WO2023017903A1 - 터치 디스플레이 장치 - Google Patents
터치 디스플레이 장치 Download PDFInfo
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- WO2023017903A1 WO2023017903A1 PCT/KR2021/014616 KR2021014616W WO2023017903A1 WO 2023017903 A1 WO2023017903 A1 WO 2023017903A1 KR 2021014616 W KR2021014616 W KR 2021014616W WO 2023017903 A1 WO2023017903 A1 WO 2023017903A1
- Authority
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- WIPO (PCT)
- Prior art keywords
- guide plate
- light guide
- light source
- source array
- camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
Definitions
- the present disclosure relates to a display device, and more particularly, to a touch display device having a touch function.
- a touch panel is one of several methods of configuring an interface between an electronic device having a display and a user, and is an input device that allows a user to operate an electronic device by directly contacting the screen of the display with a hand or a stylus pen.
- the touch panel allows you to intuitively operate electronic devices by simply touching the buttons displayed on the display screen with your finger. It is widely used in traffic information kiosks and food ordering kiosks.
- these touch panels are classified into resistive type touch panels, capacitive touch panels, ultrasonic touch panels, infrared type touch panels, etc. there is
- Such a touch panel according to the prior art has a problem in that an electronic device can be operated only when the screen of the display is directly contacted.
- an object of one aspect of the present disclosure is to provide a touch display device capable of operating an electronic device not only in contact with the display surface but also in proximity to the display surface.
- a touch display device includes a display panel including a display surface; a light guide plate installed on the upper side of the display surface of the display panel and formed to emit light incident on one side to the upper side; a first light source array installed on one side of the light guide plate and including a plurality of infrared light sources emitting infrared rays toward one side of the light guide plate; a camera installed on at least one side of the first light source array and configured to capture an image of infrared rays emitted through the entire area of the upper surface of the light guide plate; and a processor recognizing coordinates of an input object adjacent to an upper surface of the light guide plate by using an infrared image captured by the camera.
- the touch display device further includes a second light source array installed above the first light source array and including a plurality of infrared light sources emitting infrared rays toward an upper side of the upper surface of the light guide plate, wherein the camera is the first light source array. It may be formed to capture infrared rays emitted from the two-light source array.
- the plurality of infrared light sources of the second light source array may be installed in a straight line parallel to the plurality of infrared light sources of the first light source array.
- the printed circuit board may further include a plurality of infrared light sources of the first light source array and a plurality of infrared light sources of the second light source array installed in two lines.
- the processor may be installed on the printed circuit board.
- the processor recognizes a reference touchable area from the upper surface image of the light guide plate captured by the camera while the first light source array is turned on and the second light source array is turned off, and the processor determines the touch area adjacent to the light guide plate.
- the processor removes and touches an area deviating from the upper surface of the light guide plate in the image of the adjacent upper surface of the light guide plate captured by the camera while the first light source array and the second light source array are turned on.
- the coordinates of the input object may be detected by extracting a possible area and comparing the extracted touchable area with the reference touchable area.
- the light guide plate is formed in a rectangular flat plate shape and includes a first surface, a second surface facing the first surface and on which the display panel is installed, and four side surfaces, and the first light source array is the light guide plate.
- the light guide plate may be formed to emit infrared rays incident to the first side through the first side.
- the plurality of infrared light sources of the first light source array may be installed in a straight line along the first side surface of the light guide plate.
- a second side and a third side perpendicular to the first side may be formed such that infrared rays emitted from the first light source array are not emitted to the outside of the light guide plate.
- the camera may include a wide-angle lens and an image sensor to capture infrared rays emitted from the first light source array and emitted from the entire upper surface of the light guide plate.
- the angle of view of the wide-angle lens may be greater than 90 degrees.
- the camera may include a first camera installed on one side of the first light source array and configured to capture an entire area of the upper surface of the light guide plate; and a second camera installed on the other side of the first light source array, opposite to the first camera, and configured to capture the entire upper surface of the light guide plate.
- each of the first camera and the second camera includes a wide-angle lens and an image sensor, and the angle of view of the wide-angle lens may be greater than 90 degrees.
- the processor recognizes a reference touchable area from the upper surface image of the light guide plate captured by the camera while the first light source array is turned on, and the processor recognizes the coordinates of the input object adjacent to the light guide plate
- the processor extracts a touchable area by removing an area deviating from the upper surface of the light guide plate in the image of the adjacent top surface of the light guide plate captured by the camera while the first light source array is turned on, and extracts the touchable area and the reference touch It may be configured to recognize the coordinates of the input object by comparing the possible regions.
- the infrared light source may include an infrared LED.
- the touch display device having the structure as described above recognizes the coordinates of an input object when the input object contacts the upper surface of the light guide plate or when the input object is adjacent to the upper surface of the light guide plate without contacting the upper surface of the light guide plate. to control the display surface.
- the touch display device recognizes the upper surface of the light guide plate as a touchable area, an error of misrecognizing the coordinates of the input device due to infrared rays reflected from an area outside the light guide plate can be prevented.
- FIG. 1 is a diagram illustrating a touch display device according to an exemplary embodiment of the present disclosure
- FIG. 2 is a cross-sectional view illustrating a touch display device according to an exemplary embodiment of the present disclosure
- FIG. 3 is a functional block diagram of a touch display device according to an embodiment of the present disclosure.
- FIG. 4 is a diagram for explaining an operation of a touch display device according to an embodiment of the present disclosure.
- FIG. 5 is a flowchart illustrating an operation of a touch display device according to an embodiment of the present disclosure
- FIG. 6 is a diagram illustrating a touch display device according to an embodiment of the present disclosure.
- FIG. 7 is a diagram illustrating a touch display device according to an embodiment of the present disclosure.
- FIG. 8 is a cross-sectional view illustrating a touch display device according to an exemplary embodiment
- FIG. 9 is a functional block diagram of a touch display device according to an embodiment of the present disclosure.
- 10A is a diagram showing a region of infrared rays emitted from a first light source array according to an embodiment of the present disclosure
- 10B is a view showing an infrared region emitted from a first light source array and an infrared region emitted from a second light source array according to an embodiment of the present disclosure
- FIG. 11 is a diagram illustrating a case where a first camera and a second camera used in a touch display device according to an embodiment of the present disclosure are installed on a printed circuit board;
- FIG. 12 is a diagram for explaining an operation of a touch display device according to an embodiment of the present disclosure.
- FIG. 13 is a flowchart illustrating an operation of a touch display device according to an exemplary embodiment of the present disclosure
- FIG. 14 is a diagram illustrating a touch display device according to an embodiment of the present disclosure.
- first and second may be used to describe various components, but the components should not be limited by the terms. The terms may only be used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present disclosure.
- FIG. 1 is a diagram illustrating a touch display device according to an exemplary embodiment of the present disclosure.
- 2 is a cross-sectional view illustrating a touch display device according to an exemplary embodiment of the present disclosure.
- 3 is a functional block diagram of a touch display device according to an embodiment of the present disclosure.
- a touch display device 1 includes a display panel 10, a light guide plate 20, a light source array 30, cameras 51 and 52, a processor ( 90) may be included.
- the display panel 10 is formed to display images.
- the display panel 10 may be formed in a substantially rectangular flat plate shape.
- the display panel 10 may include a display surface 11 on which images are displayed.
- the display panel 10 may be implemented in various formats.
- the display panel 10 includes a liquid crystal display panel, an organic light emitting diode display panel, a quantum dot light emitting diodes panel, and a micro LED panel.
- Various types of display panels such as the like may be used. Since the display panel 10 may use a conventional display panel, a detailed description thereof will be omitted.
- the light guide plate 20 may be installed above the display panel 10 . Specifically, the light guide plate 20 may be installed above the display surface 11 of the display panel 10 . Referring to FIG. 1 , the light guide plate 20 may be positioned in front of the display panel 10 . In the following description, referring to FIG. 2 , it will be described that the light guide plate 20 is installed above the display panel 10 .
- the light guide plate 20 is formed in a rectangular flat shape, and includes a first surface (ie, upper surface 25), a second surface (ie, lower surface, 26) facing the first surface 25, and four side surfaces. can do. Specifically, the first surface 25 and the second surface 26 are formed in a rectangular shape and face each other in parallel, the first surface 25 forms the upper surface of the light guide plate 20, and the second surface 26 A lower surface of the silver light guide plate 20 may be formed.
- the four side surfaces include a first side 21, a second side 22, a third side 23, and a second side connecting the first side (ie, the upper side, 25) and the second side (ie, the lower side, 26). It may include four sides (24).
- the second side surface 22 and the third side surface 23 are perpendicular to the first side surface and are parallel to each other.
- the fourth side surface 24 is parallel to the first side surface 21 and perpendicular to the second side surface 22 and the third side surface 23 .
- the display panel 10 is installed on the lower surface (ie, the second surface 26 ) of the light guide plate 20 , that is, the second surface. Accordingly, the lower surface (ie, the second surface 26 ) of the light guide plate 20 and the display surface 11 of the display panel 10 face each other.
- the light guide plate 20 may be formed larger than the size of the display surface 11 of the display panel 10 .
- the light guide plate 20 may be formed to emit light incident from one side through the upper surface 25 .
- the light guide plate 20 may be formed to emit light incident from the first side surface 21 to the outside through the top surface 25 , that is, the first surface.
- the second side surface 22 and the third side surface 23 perpendicular to the first side surface 21 of the light guide plate 20 may be formed so that light incident on the first side surface 21 is not emitted to the outside.
- the inner surface of the second side surface 22 and the inner surface of the third side surface 23 may be formed to reflect or block light.
- the second side surface 22 and the third side surface 23 of the light guide plate 20 are formed to transmit light, and a blocking plate or light blocking plate blocks light to the second side surface 22 and the third side surface 23.
- a reflector can be installed to reflect the
- the fourth side surface 24 facing and parallel to the first side surface 21 may also be formed so that incident light is not emitted to the outside.
- the processor 90 obtains an image of the upper surface 25 of the light guide plate 20 from the infrared image of the light guide plate 20 captured by the cameras 51 and 52. (25) can be recognized. Accordingly, the processor 90 may recognize the entire area of the upper surface 25 of the light guide plate 20 as a touchable area.
- the light guide plate 20 may be formed of a transparent material through which light passes.
- the light guide plate 20 may be formed of transparent plastic or resin. Therefore, the user can see the image displayed on the display surface 11 of the display panel 10 through the light guide plate 20 .
- the light source array 30 includes a plurality of infrared light sources 31 and may be formed to emit infrared rays.
- the light source array 30 may be installed on one side of the light guide plate 20 .
- the light source array 30 may be installed adjacent to the first side surface 21 of the light guide plate 20 .
- the light source array 30 may be installed to contact the first side surface 21 of the light guide plate 20 . Accordingly, infrared rays emitted from the light source array 30 may be incident into the light guide plate 20 through the first side surface 21 of the light guide plate 20 .
- the plurality of infrared light sources 31 of the light source array 30 may be arranged in a straight line along one side surface of the light guide plate 20 .
- the light source array 30 may include a printed circuit board 33 on which a plurality of infrared light sources 31 are installed.
- the active circuit board 33 is installed parallel to one side of the light guide plate 20, and a plurality of infrared light sources 31 are installed on one side of the active circuit board 33 facing the other side of the light guide plate 20. ) It may be provided in a straight line parallel to one side of the.
- infrared rays emitted from the light source array 30 may be incident on the first side surface 21 of the light guide plate 20 and emitted to the first surface 25 of the light guide plate 20, that is, the upper surface. If some of the infrared rays leaks out to the lower surface (ie, the second surface 26) of the light guide plate 20, the leaked infrared rays are reflected by the display surface 11 of the display panel 10 and the lower surface of the light guide plate 20 (26) and can be emitted to the outside through the upper surface (25) of the light guide plate (10).
- the plurality of infrared light sources 31 constituting the light source array 30 may be formed of infrared LEDs.
- the cameras 51 and 52 are configured to capture infrared rays emitted from the light guide plate 20 .
- the cameras 51 and 52 are provided to capture an image of the entire upper surface 25 of the light guide plate 20 .
- the cameras 51 and 52 may capture infrared rays emitted through the entire area of the upper surface 25 of the light guide plate 20 .
- the cameras 51 and 52 may include a wide-angle lens and an image sensor.
- the wide-angle lens has an angle of view capable of capturing an image of the entire upper surface of the light guide plate 20 .
- the angle of view of the wide-angle lens may be 90 degrees or more.
- the image sensor is configured to generate an image of incident infrared rays. For example, when the light source array 30 emits infrared rays, the image sensor may generate a top image by capturing infrared rays emitted through the entire area of the upper surface 25 of the light guide plate 20 .
- the cameras 51 and 52 may be installed on one side of the light source array 30 .
- the positions of the cameras 51 and 52 are not limited thereto. As long as the cameras 51 and 52 can capture an image of the entire upper surface 25 of the light guide plate 20, they can be installed in any position.
- the camera may include a first camera 51 and a second camera 52 .
- the first camera 51 is installed on one side of the light source array 30 and may be provided to capture an image of the entire upper surface 25 of the light guide plate 20 .
- the first camera 51 may include a wide-angle lens 51a and an image sensor 51b to capture infrared rays emitted from the light source array 30 and emitted from the entire area of the upper surface 25 of the light guide plate 20.
- the second camera 52 is installed on the other side of the first light source array 30 opposite to the first camera 51, and may be provided to capture an image of the entire upper surface 25 of the light guide plate 20.
- the second camera 52 may include a wide-angle lens 52a and an image sensor 52b to capture infrared rays emitted from the light source array 30 and emitted from the entire area of the upper surface 25 of the light guide plate 20.
- each of the wide-angle lens 51a of the first camera 51 and the wide-angle lens 52a of the second camera 52 may be greater than or equal to 90 degrees.
- the first camera 51 and the second camera 52 may be installed on both sides of the light source array 30 on the integrated circuit board 33 .
- the first camera 51 may generate a top image of the light guide plate 20
- the second camera 52 may also create a top image of the light guide plate 20 .
- the two cameras 51 and 52 are configured to generate an upper surface image of the light guide plate 20, the coordinates of the input object 70 (see FIG. 4) that contacts or is adjacent to the light guide plate 20 can be accurately calculated. .
- the processor 90 is formed to recognize the coordinates of the input object 70 that is in contact with or adjacent to the light guide plate 20 by using the images captured by the cameras 51 and 52 .
- the processor 90 may transfer the coordinates of the recognized input object 70 to the main processor 99 .
- the coordinates of the input object 70 recognized by the processor 90 refer to two-dimensional coordinates at which the front end of the input object 70 is located on the display surface 11 . That is, the coordinates of the input object 70 are two-dimensional coordinates based on the display surface 11 .
- the input object 70 refers to an object formed to select at least one point of an image displayed through the light guide plate 20 .
- the input object 70 may include a user's finger, stylus, pen, pointing stick, baton, antenna, stick, and the like.
- the processor 90 is configured to control the light source array 30 on/off. In addition, the processor 90 turns on the light source array 30 and then controls the cameras 51 and 52 so that when the input object 70 is not adjacent to the upper surface 25 of the light guide plate 20, the light guide plate 20 An upper surface image may be generated by capturing infrared rays emitted through the upper surface 25 of the camera, and the upper surface image generated by the cameras 51 and 52 may be received from the cameras 51 and 52 .
- the processor 90 may recognize and store an image of an area corresponding to the entire area of the upper surface 25 of the light guide plate 20 in which infrared rays are emitted from the upper surface image received from the cameras 51 and 52 as a reference touchable area. .
- the processor 90 controls the cameras 51 and 52 while the light source array 30 is on, so that when the input object 70 is adjacent to or in contact with the light guide plate 20, the light emitted from the upper surface of the light guide plate 20 is emitted.
- An image of an adjacent top surface may be generated by capturing infrared rays and infrared rays reflected from the input object 70 , and the adjacent top image generated by the cameras 51 and 52 may be received.
- the upper surface of the light guide plate 20 ( 25), which is located close to Therefore, when the input object 70 is adjacent to the light guide plate 20, the case where the input object 70 is in contact with the upper surface 25 of the light guide plate 20 is different from the case where the input object 70 is in contact with the upper surface 25 of the light guide plate 20 and is close to the upper surface 25 of the light guide plate 20. location may be included.
- the processor 90 may be configured to recognize the coordinates of the input object 70 by using the top image captured by the cameras 51 and 52 and the adjacent top image. Since the image processing technology in which the processor 90 recognizes the coordinates of the input object 70 using an image may use a conventional image processing technology, a detailed description thereof will be omitted.
- the processor 90 may transmit the coordinates of the input object 70 recognized using the top image and the adjacent top image to the main processor 99 .
- the processor 90 controls the first camera 51 and the second camera 52 to enable the first camera 51 and the second camera 52 ) may receive a top view image and an adjacent top view image respectively captured.
- the processor 90 controls the first camera 51 and the second camera 52 to control the light guide plate ( 20) to take an image of the upper surface 25. Then, the first camera 51 captures infrared rays emitted from the upper surface 25 of the light guide plate 20 to generate a first image, and the second camera 52 captures the infrared rays emitted from the upper surface 25 of the light guide plate 20. A second top image may be generated by imaging the emitted infrared rays.
- the first camera 51 transmits the generated first top image to the processor 90
- the second camera 52 transmits the generated second top image to the processor 90.
- the processor 90 controls the first camera 51 and the second camera 52. to capture an image of the upper surface 25 of the light guide plate 20. Then, the first camera 51 captures infrared rays emitted from the upper surface 25 of the light guide plate 20 and reflected by the input object 70 to generate a first adjacent upper surface image, and the second camera 52 Infrared rays emitted from the upper surface 25 of the light guide plate 20 and reflected by the input object 70 may be imaged to generate a second adjacent upper surface image.
- the first camera 51 transmits the generated first adjacent top image to the processor 90
- the second camera 52 transmits the generated second adjacent top image to the processor 90 .
- the processor 90 may recognize the coordinates of the input object 70 using the first top image captured by the first camera 51 and the first adjacent top image. Also, the processor 90 may recognize the coordinates of the input object 70 using the second top image captured by the second camera 52 and the second adjacent top image. The processor 90 may store the first and second top images and the first and second adjacent top images in the memory 91 to calculate the coordinates of the input object 70 through image processing.
- the processor 90 can recognize the coordinates of one input object 70 using images captured by two cameras, the coordinates of the input object 70 can be recognized more accurately than when using one camera. can do.
- the processor 90 obtains the coordinates of the input object 70 recognized using the first and second top images captured by the first camera 51 and the second camera 52 and the first and second adjacent top images. It can be transmitted to the main processor 90.
- the processor 90 may include, for example, a processing circuit such as an electronic circuit board, various electronic components such as ASIC, ROM, RAM, and/or a program module.
- a processing circuit such as an electronic circuit board, various electronic components such as ASIC, ROM, RAM, and/or a program module.
- the memory 91 may store a program for processing or control by the processor 90, a top image for calculating the coordinates of the input object 70, and an adjacent top image.
- the memory 91 may store a plurality of application programs for the processor 90 to calculate the coordinates of the input object 70 using the top image and the adjacent top image.
- the memory 91 is accessed by the processor 90, and data read/write/modify/delete/update by the processor 90 can be performed.
- a memory 91 may be implemented as a storage medium in the display panel 10, an external storage medium, a removable disk including a USB memory, a web server through a network, and the like.
- the processor 90 and the memory 91 may be installed on the active circuit board 33 on which the light source array 30 is provided.
- the main processor 99 controls the display panel 10 to output an image on the display surface 11.
- the main processor 99 may be configured to control the display panel 10 to perform a corresponding event according to the coordinates of the input object 70 input from the processor 90 .
- the main processor 99 and the processor 90 are formed separately.
- the processor 90 may be integrally formed with the main processor 99 that controls the display panel 10 .
- the light source array 30 and the light guide plate 20 may be fixed and supported by the housing 60 .
- the housing 60 may be formed to surround the light source array 30 installed on three sides of the light guide plate 20 and one side of the light guide plate 20 .
- the printed circuit board 33 of the light source array 30 is installed on the inner surface of the housing 60, and extends to the second side 22, the third side 23, and the fourth side 24 of the light guide plate 20.
- the emitted infrared rays may be blocked or reflected by the housing 60 .
- the first camera 51 and the second camera 52 may be installed on the printed circuit board 33 or the housing 60 to capture an image of the entire top surface 25 of the light guide plate 20 .
- the housing 60 may be formed to fix and support the display panel 10 . That is, the display panel 10 , the light guide plate 20 , and the light source array 30 may be installed inside one housing 60 .
- the display panel 10 may be implemented as a display device accommodated in a separately formed housing.
- the light guide plate 20 , the light source array 30 , the first camera 51 , the second camera 52 , the processor 90 , and the housing may form a touch device.
- the touch device is installed in front of the display surface 11 of the display device, the touch display device 1 according to an embodiment of the present disclosure can be implemented.
- FIG. 4 is a diagram for explaining an operation of a touch display device according to an exemplary embodiment of the present disclosure.
- 5 is a flowchart illustrating an operation of a touch display device according to an exemplary embodiment of the present disclosure.
- the processor 90 When the touch display device 1 is turned on, the processor 90 performs calibration. Specifically, when the touch display device 1 is turned on, the processor 90 turns on the light source array 30 (S50) and controls the first camera 51 and the second camera 52, respectively, so that the light guide plate 20 The entire upper surface 25 of ) is captured (S51). That is, the processor 90 controls the first camera 51 and the second camera 52, respectively, to capture infrared rays emitted to the upper surface 25 of the light guide plate 20, and to obtain a first upper surface image and a second upper surface image. generate
- the processor 90 receives a first top image captured by the first camera 51 and a second top image captured by the second camera 52 .
- the processor 90 recognizes the area corresponding to the top surface 25 of the light guide plate 20, that is, the area where infrared rays are emitted, from the first and second top images as a touchable area, and stores this as a reference touchable area. It is stored in (91) (S52).
- the processor 90 controls the first camera 51 and the second camera 52 to capture an image of the entire upper surface 25 of the light guide plate 20 (S54). Then, an adjacent top surface image including infrared rays emitted to the upper surface 25 of the light guide plate 20 and infrared rays reflected by the finger 70 is generated.
- the first camera 51 generates a first adjacent top image including infrared rays emitted from the top surface 25 of the light guide plate 20 and infrared rays reflected by the finger 70 and transmits the image to the processor 90.
- the second camera 52 generates a second adjacent top image including infrared rays emitted from the top surface 25 of the light guide plate 20 and infrared rays reflected by the finger 70 and transmits the image to the processor 90. .
- the processor 90 extracts a touchable area from the transmitted adjacent top image (S55). Next, the processor 90 compares the extracted touchable area with the reference touchable area stored in the memory 91 to calculate the position of the input object 70 (S56).
- the processor 90 extracts an image of an area corresponding to the top surface 25 of the light guide plate 20 as a first touchable area from the transmitted first adjacent top surface image. Next, the processor 90 compares the first touchable area with the reference touchable area stored in the memory 91 to calculate a first coordinate where the tip of the finger 70 is located.
- the processor 90 extracts an image of an area corresponding to the upper surface 25 of the light guide plate 20 as a second touchable area from the transmitted second adjacent upper surface image.
- the processor 90 compares the second touchable area with the reference touchable area stored in the memory 91 to calculate the second coordinate where the tip of the finger 70 is located. At this time, since the finger 70 is located at an arbitrary point on the light guide plate 20, the first coordinate and the second coordinate calculated by the processor 90 are the same.
- the tip of the input object 70 does not directly touch the top surface 25 of the light guide plate 20 and is spaced apart from the top surface 25 of the light guide plate 20 by a predetermined distance.
- the tip coordinates of (70) can be recognized. This can be referred to as a spatial touch.
- H1 represents the space touch height H1, which is the distance from the upper surface 25 of the light guide plate 20 to the front end of the input object 70 capable of space touch.
- the touch display device 1 recognizes the coordinates of the input object 70 using two cameras, that is, the first camera 51 and the second camera 52. , Even when one of the two cameras 51 and 52 does not recognize the input object 70, the coordinates of the input object 70 can be recognized. Accordingly, an error of not recognizing the coordinates of the input object 70 can be minimized compared to the case of using one camera.
- the touch display device 1 that calculates the coordinates of the input object 70 using the two cameras 51 and 52 has been described, but the touch display device according to the present disclosure is not limited thereto.
- the touch display device 1' according to an embodiment of the present disclosure may include only one camera 51 as shown in FIG. 6 .
- FIG. 6 is a plan view illustrating a touch display device according to an exemplary embodiment of the present disclosure.
- a touch display device 1' includes a display panel 10, a light guide plate 20, a light source array 30, a camera 51, and a processor 90. can include
- the touch display device 1' shown in FIG. 6 is the touch display device 1 according to the above-described embodiment except that one camera 51 is installed to capture an image of the entire upper surface 25 of the light guide plate 20. Since it is the same as, the detailed description is omitted.
- the processor 90 captures an upper surface image and an adjacent upper surface image using one camera 51, and calculates the coordinates of the input object 70 using the images. .
- the touch display device 1' having one camera 51 inputs input compared to the touch display device 1 having two cameras 51 and 52 as in the above-described embodiment.
- an error in which the coordinates of the object 70 cannot be calculated may occur.
- FIG. 7 is a plan view illustrating a touch display device according to an exemplary embodiment of the present disclosure.
- 8 is a cross-sectional view illustrating a touch display device according to an exemplary embodiment of the present disclosure.
- 9 is a functional block diagram of a touch display device according to an embodiment of the present disclosure.
- the touch display device 1 includes a display panel 10, a light guide plate 20, light source arrays 30 and 40, and cameras (51 and 52). , and a processor 90.
- the display panel 10 is formed to display images.
- the display panel 10 may be formed in a substantially rectangular flat plate shape.
- the display panel 10 may include a display surface 11 on which images are displayed.
- the display panel 10 may be implemented in various formats.
- the display panel 10 includes a liquid crystal display panel, an organic light emitting diode display panel, a quantum dot light emitting diodes panel, and a micro LED panel.
- Various types of display panels 10 such as the like may be used. Since the display panel 10 may use a conventional display panel, a detailed description thereof will be omitted.
- the light guide plate 20 may be installed above the display panel 10 . Specifically, the light guide plate 20 may be installed above the display surface 11 of the display panel 10 .
- the light guide plate 20 is formed in a rectangular flat shape, and includes a first surface (ie, upper surface 25), a second surface (ie, lower surface, 26) facing the first surface 25, and four side surfaces. can do. Specifically, the first surface 25 and the second surface 26 are formed in a rectangular shape and face each other in parallel, the first surface 25 forms the upper surface of the light guide plate 20, and the second surface 26 A lower surface of the silver light guide plate 20 may be formed.
- the four side surfaces include a first side 21, a second side 22, a third side 23, and A fourth side surface 24 may be included.
- the second side surface 22 and the third side surface 23 are perpendicular to the first side surface 21 and are parallel to each other.
- the fourth side surface 24 is parallel to the first side surface 21 and perpendicular to the second side surface 22 and the third side surface 23 .
- the display panel 10 is installed on the lower surface of the light guide plate 20, that is, the second surface 26.
- the lower surface 26 of the light guide plate 20 may be installed to face the display surface 11 of the display panel 10 .
- the light guide plate 20 may be larger than the size of the display surface 11 of the display panel 10 .
- the light guide plate 20 may be formed to emit infrared rays incident from one side through the upper surface 15 .
- the light guide plate 20 may be formed to emit infrared rays incident from the first side surface 21 to the outside through the upper surface 25 , that is, the first surface.
- the second side surface 22 and the third side surface 23 perpendicular to the first side surface 21 of the light guide plate 20 may be formed so that infrared rays incident from the first side surface 21 are not emitted to the outside.
- the inner surface of the second side surface 22 and the inner surface of the third side surface 23 may be formed to reflect or block infrared rays.
- the second side surface 22 and the third side surface 23 of the light guide plate 20 are formed to transmit infrared rays, and the second side surface 22 and the third side surface 23 block the infrared rays.
- a reflector for reflecting infrared rays may be installed.
- the blocking plate and the reflecting plate may be implemented as an inner surface of the housing 60 to be described later.
- the fourth side surface 24 facing and parallel to the first side surface 21 may also be formed in the same way as the second and third side surfaces so that incident infrared rays are not emitted to the outside of the light guide plate 20 .
- the second side surface 22, the third side surface 23, and the fourth side surface 24 of the light guide plate 20 are formed so that infrared rays are not emitted, the infrared rays incident from the first side surface 21
- the side surface 22, the third side surface 23, and the fourth side surface 24 are not released, but only through the first surface 25.
- the processor 90 may recognize the region of the upper surface 25 of the light guide plate 20 from the infrared image of the light guide plate 20 captured by the camera. .
- the processor 90 may recognize a touchable area from an infrared image obtained by capturing the top surface 25 of the light guide plate 20 . That is, the processor 90 may recognize the entire area of the upper surface 25 of the light guide plate 20 from which infrared rays are emitted as a touchable area.
- the light guide plate 20 may be formed of a transparent material through which infrared rays pass.
- the light guide plate 20 may be formed of transparent plastic or resin. Accordingly, the user can view an image displayed on the display surface 11 of the display panel 10 through the light guide plate 20 .
- the light source array may be formed to emit infrared rays.
- the light source array may be installed on one side of the light guide plate 20 .
- the light source array may be installed adjacent to the first side surface 21 of the light guide plate 20 .
- the light source array may include a first light source array 30 and a second light source array 40 .
- the first light source array 30 includes a plurality of infrared light sources 31 and may be installed adjacent to the first side surface 21 of the light guide plate 20 . Alternatively, the first light source array 30 may be installed to contact the first side surface 21 of the light guide plate 20 . Accordingly, infrared rays emitted from the first light source array 30 may be incident into the light guide plate 20 through the first side surface 21 of the light guide plate 20 .
- the plurality of infrared light sources 31 of the first light source array 30 may be arranged in a straight line along the first side surface 21 of the light guide plate 20 .
- the plurality of infrared light sources 31 of the first light source array 30 may be installed on the printed circuit board 33 .
- the printed circuit board 33 is installed parallel to the first side surface 21 of the light guide plate 20, and a plurality of infrared light sources 31 are provided on one side of the printed circuit board 33 facing the first surface of the light guide plate 20. ) can be arranged in a straight line.
- infrared rays emitted from the first light source array 30 may be incident on the first side surface 21 of the light guide plate 20 and emitted to the first surface 25 of the light guide plate 20, that is, the upper surface.
- the leaked infrared rays are reflected by the display surface 11 of the display panel 10 and incident on the lower surface 26 of the light guide plate 20.
- Light may be emitted to the outside through the upper surface 25 of the light guide plate 20 .
- the second light source array 40 includes a plurality of infrared light sources 41 and may be installed above the first light source array 30 . That is, the second light source array 40 may be installed above the first side surface 21 of the light guide plate 20 on which the first light source array 30 is installed. Accordingly, the second light source array 40 is positioned above the upper surface 25 of the light guide plate 20 .
- infrared rays emitted from the second light source array 40 may be emitted upward of the light guide plate 20 without being incident into the inside of the light guide plate 20 . That is, infrared rays emitted from the second light source array 40 may move over the upper surface 25 of the light guide plate 20 in a direction parallel to the upper surface 25 of the light guide plate 20 .
- the plurality of infrared light sources 41 of the second light source array 40 may be arranged in a straight line parallel to the plurality of infrared light sources 31 of the first light source array 30 .
- the plurality of infrared light sources 41 of the second light source array 40 may be installed on the printed circuit board 33 on which the first light source array 30 is installed.
- the plurality of infrared light sources 41 of the second light source array 40 are provided on one side of the printed circuit board 33 on which the first light source array 30 is installed, and the plurality of infrared light sources 31 of the first light source array 30 and It can be arranged side by side in a straight line.
- the second light source array 40 may be installed on the printed circuit board 33 to be spaced apart from the first light source array 30 by a predetermined distance.
- the plurality of infrared light sources 41 of the second light source array 40 are installed so that emitted infrared rays can cover the entire area of the upper surface 25 of the light guide plate 20 .
- the second light source array 40 may be formed so that the area of infrared rays emitted from the plurality of infrared light sources 41 is larger than the area of the upper surface 25 of the light guide plate 20.
- 10A is a diagram illustrating a region of infrared rays emitted from a first light source array according to an embodiment of the present disclosure.
- 10B is a diagram illustrating an infrared region emitted from a first light source array and an infrared region emitted from a second light source array according to an embodiment of the present disclosure.
- infrared rays emitted from the first light source array 30 are incident into the light guide plate 20 through the first side surface 21 of the light guide plate 20 and cover the top surface 25 of the light guide plate 20 . emitted to the outside through At this time, since the second side surface 22, the third side surface 23, and the fourth side surface 24 of the light guide plate 20 are formed not to emit infrared rays, the infrared rays emitted from the first light source array 30
- the area TA is limited to the upper surface 25 of the light guide plate 20 . This area TA corresponds to the touchable area.
- the plurality of infrared light sources 41 of the second light source array 40 emit infrared rays toward the upper side of the light guide plate 20 in a direction parallel to the light guide plate 20, and the emitted infrared region A is the portion of the light guide plate 20. It may be formed to be larger than the area of the upper surface 25 .
- Infrared light emitted from the infrared light source 41 may spread at a certain angle rather than parallel light. That is, infrared rays emitted from the infrared light source 41 may form a substantially conical shape. Therefore, as shown in FIG. 10B , a portion A1 of infrared rays emitted from the two infrared light sources 41 installed at both ends of the second light source array 40 may deviate from the light guide plate 20 .
- infrared rays emitted from the first light source array 30 are incident on the first side surface 21 of the light guide plate 20 and emitted to the first surface 25 of the light guide plate 20, that is, the upper surface, and the second light source array ( Infrared rays emitted from 40) may be emitted toward the upper side of the upper surface 25 of the light guide plate 20 in a direction substantially parallel to the light guide plate 20.
- the infrared rays emitted from the second light source array 40 using the infrared region TA determined by the first light source array 30 and the light guide plate 20 A region (A) of can be defined. That is, as shown in FIG. 10B , of the infrared region A emitted from the second light source array 40, the upper surface 25 of the light guide plate 20 is excluded except for the infrared region A1 extending beyond the light guide plate 20. ) may be recognized as a touchable area TA.
- the plurality of infrared light sources 31 and 41 constituting the first light source array 30 and the second light source array 40 may be formed of infrared LEDs.
- the cameras 51 and 52 are configured to capture infrared rays emitted from the light guide plate 20 and the second light source array 40 .
- the cameras 51 and 52 are provided to capture an image of the entire upper surface 25 of the light guide plate 20 .
- the cameras 51 and 52 may capture images of infrared rays emitted through the entire area of the upper surface 25 of the light guide plate 20 and infrared rays emitted toward the upper side of the light guide plate 20 .
- the cameras 51 and 52 may include a wide-angle lens and an image sensor.
- the wide-angle lens has an angle of view capable of capturing an image of the entire upper surface 25 of the light guide plate 20 .
- the angle of view of the wide-angle lens may be 90 degrees or more.
- the image sensor is configured to generate an image of incident infrared rays. For example, when the first and second light source arrays 30 and 40 emit infrared rays, the image sensor generates a top image by capturing infrared rays emitted through the entire area of the upper surface 25 of the light guide plate 20 can do.
- the cameras 51 and 52 may be installed on one side of the second light source array 40 .
- the positions of the cameras 51 and 52 are not limited thereto. As long as the cameras 51 and 52 can capture an image of the entire upper surface 25 of the light guide plate 20, they can be installed in any position.
- the camera may include a first camera 51 and a second camera 52 .
- the first camera 51 is installed on one side of the second light source array 40 and may be provided to capture the entire area of the upper surface 25 of the light guide plate 20 .
- the first camera 51 emits infrared rays emitted from the first light source array 30 and emitted upward from the entire area of the upper surface 25 of the light guide plate 20, and the second light source array 40 from the upper surface of the light guide plate 20 ( 25) may include a wide-angle lens 51a and an image sensor 51b to capture infrared rays emitted to the upper side.
- the second camera 52 is installed on the other side of the second light source array 40 opposite to the first camera 51 and may be provided to capture the entire area of the upper surface 25 of the light guide plate 20 .
- the second camera 52 emits infrared rays emitted from the first light source array 30 and emitted upward from the entire area of the upper surface 25 of the light guide plate 20 and the upper surface of the light guide plate 20 from the second light source array 40 ( 25) may include a wide-angle lens 52a and an image sensor 52b to capture infrared rays emitted upward.
- each of the wide-angle lens 51a of the first camera 51 and the wide-angle lens 52a of the second camera 52 may be greater than or equal to 90 degrees.
- the first camera 51 and the second camera 52 may be installed on both sides of the second light source array 40 on the printed circuit board 33 .
- FIG. 11 is a diagram illustrating a case where a first camera and a second camera used in a touch display device according to another embodiment of the present disclosure are installed on a printed circuit board.
- the plurality of infrared light sources 31 of the first light source array 30 and the plurality of infrared light sources 41 of the second light source array 40 are installed side by side in two lines on the printed circuit board 33. has been
- the first camera 51 is installed on the printed circuit board 33 to the left of the second light source array 40
- the second camera 52 is installed on the printed circuit board 33 to the right of the second light source array 40 ( 33) is installed.
- the first camera 51 and the second camera 52 are installed on the printed circuit board 33 so as to capture an image of the entire upper surface 25 of the light guide plate 20 .
- the first camera 51 and the second camera 52 may each generate an image of the upper surface 25 of the light guide plate 20 .
- the two cameras 51 and 52 are configured to generate images of the upper surface 20 of the light guide plate 20, respectively, the coordinates of the input object 70 contacting or adjacent to the light guide plate 20 can be accurately calculated.
- the processor 90 is configured to recognize the coordinates of the input object 70 that contacts or is adjacent to the light guide plate 20 using images captured by the first camera 51 and the second camera 52 .
- the processor 90 may transfer the coordinates of the recognized input object 70 to the main processor 99 .
- the coordinates of the input object 70 recognized by the processor 90 refer to two-dimensional coordinates at which the front end of the input object 70 is located on the display surface 11 . That is, the coordinates of the input object 70 are two-dimensional coordinates based on the display surface 11 .
- the processor 90 is configured to turn on/off the first light source array 30 and the second light source array 40 .
- the processor 90 turns on the first light source array 30 and the second light source array 40 and then controls the cameras 51 and 52 so that the input object 70 is the upper surface 25 of the light guide plate 20.
- the infrared rays emitted through the upper surface 25 of the light guide plate 20 are captured to generate an upper surface image, and the first and second cameras 51 and 52 from the first and second cameras 51, 52) may receive the generated top image.
- the processor 90 converts an image of an area corresponding to the entire area of the top surface 25 of the light guide plate 20 from which infrared rays are emitted from the top surface images received from the first and second cameras 51 and 52 to the reference touchable area. can be recognized and stored.
- the processor 90 controls the first and second cameras 51 and 52 while the first light source array 30 and the second light source array 40 are turned on so that the input object 70 is the light guide plate 20
- An image of the adjacent top surface is generated by capturing infrared rays emitted from the upper surface 25 of the light guide plate 20 and infrared rays reflected from the input object 70 when adjacent to or in contact with the first and second cameras 51 and 52 It is possible to receive an adjacent top surface image generated by .
- the first and second cameras 51 and 52 are emitted from the first and second light source arrays 30 and 40 and are controlled by the input object 70.
- the processor 90 may be configured to recognize the coordinates of the input object 70 by using the top image captured by the first and second cameras 51 and 52 and the adjacent top image. Since the image processing technology in which the processor 90 recognizes the coordinates of the input object 70 using an image may use a conventional image processing technology, a detailed description thereof will be omitted.
- the processor 90 may transmit the coordinates of the input object 70 recognized using the top image and the adjacent top image to the main processor 99 .
- the processor 90 controls the first camera 51 and the second camera 52 after turning on the first light source array 30 and before the input object 70 is adjacent to the light guide plate 20.
- An image is taken of the upper surface 25 of the light guide plate 20 .
- the first camera 51 generates a first image of the upper surface 25 of the light guide plate 20 by capturing infrared rays emitted from the upper surface 25 of the light guide plate 20, and the second camera 52 captures the infrared rays emitted from the upper surface 25 of the light guide plate 20. It is possible to generate a second image of the upper surface by capturing emitted infrared rays.
- the first camera 51 transmits the generated first top image to the processor 90
- the second camera 52 transmits the generated second top image to the processor 90.
- the processor 90 extracts an image of an area where infrared rays are detected (that is, an area corresponding to the upper surface 25 of the light guide plate 20) from the received first and second top images, and extracts the image of the touchable area. , and stores this image in the memory 91 as a reference touchable area.
- the processor 90 turns on the second light source array 40 .
- the processor 90 When the input object 70 is adjacent to or in contact with the top surface 25 of the light guide plate 20 while the first and second light source arrays 30 and 40 are turned on, the processor 90 operates the first camera 51 and 2 The camera 52 is controlled to capture an image of the upper surface 25 of the light guide plate 20 .
- the first camera 51 generates a first adjacent top image by capturing the infrared rays emitted from the upper surface 25 of the light guide plate 20 and the infrared rays reflected by the input object 70
- the second camera 52 may generate a second adjacent top image obtained by capturing infrared rays emitted from the upper surface 25 of the light guide plate 20 and infrared rays reflected by the input object 70 .
- the first adjacent top image and the second adjacent top image are infrared rays emitted from the first light source array 30 and emitted through the upper surface 25 of the light guide plate 20 and infrared rays emitted from the second light source array 40 .
- the first and second cameras 51 and 52 each capture an image of the reflected state of the input object 70 .
- the first camera 51 transmits the generated first adjacent top image to the processor 90
- the second camera 52 transmits the generated second adjacent top image to the processor 90 .
- the processor 90 may recognize the coordinates of the input object 70 using the reference touchable area and the first adjacent top image captured by the first camera 51 . In addition, the processor 90 may recognize the coordinates of the input object 70 using the reference touchable region and the second adjacent top image captured by the second camera 52 .
- the processor 90 When the processor 90 recognizes the coordinates of the input object 70, the processor 90 detects an area A1 outside the light guide plate 20 in the first adjacent top image captured by the first camera 51, that is, a touch A portion outside the available area TA is removed, and a touchable area corresponding to the upper surface 25 of the light guide plate 20 is extracted. Thereafter, the processor 90 may compare the touchable area extracted from the first adjacent top image with the reference touchable area stored in the memory 91 to detect the coordinates of the input object 70 .
- the processor 90 removes the area A1 outside the light guide plate 20, that is, the part outside the touchable area TA, from the second adjacent top image captured by the second camera 52, and A touchable area corresponding to the upper surface 25 of ) is extracted. Then, the processor 90 may compare the touchable area extracted from the second adjacent top image with the reference touchable area stored in the memory 91 to detect the coordinates of the input object 70 .
- the processor 90 may store the first and second top images and the first and second adjacent top images in the memory 91 to calculate the coordinates of the input object 70 through image processing.
- the processor 90 can recognize the coordinates of one input object 70 using the images captured by the two cameras 51 and 52, the coordinates of the input object 70 can be reduced compared to the case of using one camera. can be accurately recognized.
- the processor 90 recognizes the coordinates of the input object 70 using the touchable area TA corresponding to the upper surface 25 of the light guide plate 20, the processor 90 is able to detect the outside of the light guide plate 20. It is possible to prevent an error of erroneously recognizing the coordinates of the input object 70 by the reflected infrared rays.
- the processor 90 obtains the coordinates of the input object 70 recognized using the first and second top images captured by the first camera 51 and the second camera 52 and the first and second adjacent top images. to the main processor 99.
- the processor 90 may include, for example, a processing circuit such as an electronic circuit board, various electronic components such as ASIC, ROM, RAM, and/or a program module.
- a processing circuit such as an electronic circuit board, various electronic components such as ASIC, ROM, RAM, and/or a program module.
- the memory 91 may store a program for processing or control by the processor 90, a top image for calculating the coordinates of the input object 70, and an adjacent top image.
- the memory 91 stores a plurality of application programs for the processor 90 to calculate the coordinates of the input object 70 using the first and second top images and the first and second adjacent top images.
- the memory 91 is accessed by the processor 90, and data read/write/modify/delete/update by the processor 90 can be performed.
- a memory 91 may be implemented as a storage medium in the display panel 10, an external storage medium, a removable disk including a USB memory, a web server through a network, and the like.
- the processor 90 and the memory 91 may be installed on the printed circuit board 33 on which the first and second light source arrays 30 and 40 are provided.
- the main processor 99 controls the display panel 10 to output an image on the display surface 11.
- the main processor 99 may be configured to control the display panel 10 to perform a corresponding event according to the coordinates of the input object 70 input from the processor 90 .
- the main processor 99 and the processor 90 are formed separately.
- the processor 90 may be integrally formed with the main processor 99 that controls the display panel 10 .
- the printed circuit board 33 and the light guide plate 20 on which the first light source array 30 and the second light source array 40 are installed may be fixed and supported by the housing 60.
- the housing 60 may be formed to surround the printed circuit board 33 installed on three sides of the light guide plate 20 and one side of the light guide plate 20 .
- the printed circuit board 33 is installed on the inner surface of the housing 60, and infrared rays emitted to the second side 22, the third side 23, and the fourth side 24 of the light guide plate 20 are emitted by the housing ( 60) can be blocked or reflected.
- the first camera 51 and the second camera 52 capture images of the entire area of the upper surface 25 of the light guide plate 20 and the infrared rays emitted from the second light source array 40 on the printed circuit board 33 or It can be installed in the housing 60.
- the housing 60 may be formed to fix and support the display panel 10 . That is, the display panel 10 , the light guide plate 20 , and the printed circuit board 33 may be installed inside one housing 60 .
- FIG. 12 is a diagram for explaining an operation of a touch display device according to an embodiment of the present disclosure.
- 13 is a flowchart illustrating an operation of a touch display device according to another exemplary embodiment of the present disclosure.
- the processor 90 When the touch display device 1 is turned on, the processor 90 performs calibration. Specifically, when the touch display device 1 is turned on, the processor 90 turns on the light source array 30 (S130) and controls the first camera 51 and the second camera 52, respectively, so that the light guide plate 20 The entire upper surface 25 of ) is imaged (S131). That is, the processor 90 controls the first camera 51 and the second camera 52, respectively, to capture infrared rays emitted to the upper surface 25 of the light guide plate 20, and to obtain a first upper surface image and a second upper surface image. generate
- the processor 90 receives a first top image captured by the first camera 51 and a second top image captured by the second camera 52 .
- the processor 90 extracts an image of an area corresponding to the top surface 25 of the light guide plate 20, that is, an area where infrared rays are emitted, from the first top image and the second top image, and denotes an image of the touchable area TA (FIG. 9A). reference).
- the processor 90 stores the image of the touchable area in the memory 91 as a reference touchable area (S132).
- the processor 90 turns on the second light source array 40 (S133). Then, infrared rays emitted from the second light source array 40 move upward of the upper surface 25 of the light guide plate 20 .
- infrared rays emitted from the first and second light source arrays 30 and 40 are emitted from the finger. reflected by (70). That is, infrared rays emitted from the first light source array 30 through the upper surface 25 of the light guide plate 20 and infrared rays emitted from the second light source array 40 toward the upper surface 25 of the light guide plate 20 are emitted from the fingers. reflected by (70).
- the processor 90 controls the first camera 51 and the second camera 52 to capture an image of the entire upper surface 25 of the light guide plate 20 (S135). Then, an adjacent top surface image including infrared rays emitted to the upper surface 25 of the light guide plate 20 and infrared rays reflected by the finger 70 is generated. Specifically, the first camera 51 generates a first adjacent top image including infrared rays emitted from the top surface 25 of the light guide plate 20 and infrared rays reflected by the finger 70 and transmits the image to the processor 90. The second camera 52 generates a second adjacent top image including infrared rays emitted from the top surface 25 of the light guide plate 20 and infrared rays reflected by the finger 70 and transmits the image to the processor 90. .
- the processor 90 extracts a touchable area from the transmitted adjacent top image (S136). Next, the processor 90 calculates the position of the input object 70 by comparing the extracted touchable area with the reference touchable area stored in the memory 91 (S137).
- the processor 90 removes an area outside the top surface 25 of the light guide plate 20 from the transmitted first adjacent top image, and converts the image of the area corresponding to the top surface 25 of the light guide plate 20 into a first image. Extract to the touchable area. Next, the processor 90 compares the first touchable area with the reference touchable area stored in the memory 91 to calculate a first coordinate where the tip of the finger 70 is located.
- the processor 90 removes an area outside the upper surface 25 of the light guide plate 20 from the transmitted second adjacent upper surface image, and second touches the image of the area corresponding to the upper surface 25 of the light guide plate 20. Extract to the possible domain.
- the processor 90 compares the second touchable area with the reference touchable area stored in the memory 91 to calculate the second coordinate where the tip of the finger 70 is located. At this time, since the finger 70 is located at one point of the light guide plate 20, the first coordinate and the second coordinate calculated by the processor 90 are the same.
- the touch display device 1 emits infrared rays to the first and second light source arrays 30 and 40 and inputs them to the first camera 51 and the second camera 52. Since the coordinates of the input object 70 are recognized by capturing infrared rays reflected by the object 70, the coordinates of the input object 70 can be better recognized than when using a single light source array.
- the touch display device 1 since the touch display device 1 according to an embodiment of the present disclosure emits infrared rays using the first and second light source arrays 30 and 40 arranged in two lines in parallel, as in the above-described embodiment, Compared to the touch display device 1 using the light source array 30 arranged in one line, since the amount of infrared rays reflected on the input object 70 is large, it is easy to recognize the coordinates of the input object 70 and accuracy can be improved. can
- the touch display device 1 since the touch display device 1 according to an embodiment of the present disclosure includes the second light source array 40 disposed on the light guide plate 20, it does not directly touch the upper surface 25 of the light guide plate 20.
- the height H2 at which a spatial touch capable of recognizing the coordinates of the tip of the input object 70 is a single line of light source array 30, as in the above-described embodiment. It is higher than the space touch height H1 of the touch display device 1 including .
- the touch display device 1 since the touch display device 1 according to an embodiment of the present disclosure uses two cameras 51 and 52, when one of the two cameras 51 and 52 does not recognize the input object 70 Also, the coordinates of the input object 70 can be recognized. Therefore, compared to the case of using one camera, an error in which the touch display device does not recognize the coordinates of the input object 70 can be minimized.
- a touch display device according to an embodiment of the present disclosure may include only one camera as shown in FIG. 14 .
- FIG. 14 is a diagram illustrating a touch display device according to another exemplary embodiment of the present disclosure.
- a touch display device 1' includes a display panel 10, a light guide plate 20, first and second light source arrays 30 and 40, and a camera 51. , and a processor 90.
- the touch display device 1' shown in FIG. 14 has the above-mentioned features except that one camera 51 is installed on one side of the second light source array 40 to capture an image of the entire upper surface 25 of the light guide plate 20. Since it is the same as the touch display device 1 according to the embodiment, a detailed description thereof will be omitted.
- the processor 90 captures an upper surface image and an adjacent upper surface image using one camera 51, and uses this to calculate the coordinates of the input object 70. do.
- the touch display device 1' having one camera 51 inputs input compared to the touch display device 1 having two cameras 51 and 52 as in the above-described embodiment. There is a high possibility that an error in which the coordinates of the object 70 cannot be calculated may occur.
- the touch display device having the structure as described above recognizes the coordinates of an input object when the input object contacts the upper surface of the light guide plate or when the input object is adjacent to the upper surface of the light guide plate without contacting the upper surface of the light guide plate. to control the display surface.
- the touch display device recognizes the upper surface of the light guide plate as a touchable area, an error of misrecognizing the coordinates of the input device due to infrared rays reflected from an area outside the light guide plate can be prevented.
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Abstract
Description
Claims (15)
- 디스플레이면을 포함하는 디스플레이 패널;상기 디스플레이 패널의 디스플레이면의 상측에 설치되며, 일 측면으로 입사되는 광을 상면으로 방출하도록 형성된 도광판;상기 도광판의 일측에 설치되며, 상기 도광판의 일 측면으로 적외선을 방출하는 복수의 적외선 광원을 포함하는 제1광원 어레이;상기 제1광원 어레이의 적어도 일측에 설치되며, 상기 도광판의 상면의 전체 영역을 통해 방출되는 적외선을 촬상할 수 있도록 형성된 카메라; 및상기 카메라에 의해 촬상된 적외선 이미지를 이용하여 상기 도광판의 상면에 인접한 입력물체의 좌표를 인식하는 적어도 한 개의 프로세서;를 포함하는, 터치 디스플레이 장치.
- 제 1 항에 있어서,상기 제1광원 어레이의 상측에 설치되며, 상기 도광판의 상면의 상측으로 적외선을 방출하는 복수의 적외선 광원을 포함하는 제2광원 어레이;를 더 포함하며,상기 카메라는 상기 제2광원 어레이에서 방출되는 적외선을 촬상할 수 있도록 형성되는, 터치 디스플레이 장치.
- 제 2 항에 있어서,상기 제2광원 어레이의 복수의 적외선 광원은 상기 제1광원 어레이의 복수의 적외선 광원과 평행하게 일직선으로 설치되는, 터치 디스플레이 장치.
- 제 3 항에 있어서,상기 제1광원 어레이의 복수의 적외선 광원과 상기 제2광원 어레이의 복수의 적외선 광원이 2줄로 설치된 인쇄회로기판을 더 포함하는, 터치 디스플레이 장치.
- 제 4 항에 있어서,상기 적어도 한 개의 프로세서는 상기 인쇄회로기판에 설치되는, 터치 디스플레이 장치.
- 제 2 항에 있어서,상기 적어도 한 개의 프로세서는,상기 제1광원 어레이가 온되고 상기 제2광원 어레이가 오프된 상태에서 상기 카메라가 촬상한 상기 도광판의 상면 이미지로부터 기준 터치 가능 영역을 인식하고,상기 도광판에 인접한 상기 입력물체의 좌표를 인식할 때,상기 제1광원 어레이와 상기 제2광원 어레이가 온된 상태에서 상기 카메라가 촬상한 상기 도광판의 인접 상면 이미지에서 상기 도광판의 상면에서 벗어나는 영역을 제거하여 터치 가능 영역을 추출하고, 추출한 상기 터치 가능 영역과 상기 기준 터치 가능 영역을 비교하여 상기 입력물체의 좌표를 검출하도록 형성되는, 터치 디스플레이 장치.
- 제 1 항에 있어서,상기 도광판은 직사각형의 평판 형상으로 형성되며, 제1면, 상기 제1면과 마주하며 상기 디스플레이 패널이 설치되는 제2면, 및 4개의 측면을 포함하며,상기 제1광원 어레이는 상기 도광판의 4개의 측면 중 제1측면으로 적외선을 입사시킬 수 있도록 설치되며,상기 도광판은 상기 제1측면으로 입사된 상기 적외선이 상기 제1면을 통해 방출되도록 형성되는, 터치 디스플레이 장치.
- 제 7 항에 있어서,상기 제1광원 어레이의 복수의 적외선 광원은 상기 도광판의 제1측면을 따라 일직선으로 설치되는, 터치 디스플레이 장치.
- 제 7 항에 있어서,상기 도광판은 상기 4개의 측면 중 상기 제1측면에 수직한 제2측면과 제3측면은 상기 제1광원 어레이에서 방출되는 적외선이 상기 도광판의 외부로 방출되지 않도록 형성되는, 터치 디스플레이 장치.
- 제 1 항에 있어서,상기 카메라는 상기 제1광원 어레이에서 방출되어 상기 도광판의 상면의 전체 영역에서 방출되는 적외선을 촬영할 수 있도록 광각 렌즈와 이미지 센서를 포함하는, 터치 디스플레이 장치.
- 제 10 항에 있어서,상기 광각 렌즈의 화각은 90도보다 큰, 터치 디스플레이 장치.
- 제 1 항에 있어서,상기 카메라는,상기 제1광원 어레이의 일측에 설치되며, 상기 도광판의 상면의 전체 영역을 촬영할 수 있도록 형성되는 제1카메라; 및상기 제1카메라와 반대쪽으로 상기 제1광원 어레이의 타측에 설치되며, 상기 도광판의 상면의 전체 영역을 촬영할 수 있도록 형성되는 제2카메라;를 포함하는, 터치 디스플레이 장치.
- 제 12 항에 있어서,상기 제1카메라와 상기 제2카메라는 각각 광각 렌즈와 이미지 센서를 포함하며,상기 광각 렌즈의 화각은 90도보다 큰, 터치 디스플레이 장치.
- 제 1 항에 있어서,상기 적어도 한 개의 프로세서는,상기 제1광원 어레이가 온된 상태에서 상기 카메라가 촬상한 상기 도광판의 상면 이미지로부터 기준 터치 가능 영역을 인식하고,상기 도광판에 인접한 상기 입력물체의 좌표를 인식할 때,상기 제1광원 어레이가 온된 상태에서 상기 카메라가 촬상한 상기 도광판의 인접 상면 이미지에서 상기 도광판의 상면에서 벗어나는 영역을 제거하여 터치 가능 영역을 추출하고, 추출한 상기 터치 가능 영역과 상기 기준 터치 가능 영역을 비교하여 상기 입력물체의 좌표를 인식하도록 형성되는, 터치 디스플레이 장치.
- 제 1 항에 있어서,상기 적외선 광원은 적외선 엘이디를 포함하는, 터치 디스플레이 장치.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202180101350.5A CN117795462A (zh) | 2021-08-10 | 2021-10-19 | 触摸显示装置 |
| EP21953550.7A EP4354265A4 (en) | 2021-08-10 | 2021-10-19 | TOUCH DISPLAY DEVICE |
| US17/713,733 US12159009B2 (en) | 2021-08-10 | 2022-04-05 | Touch display apparatus with light guide plate using infrared light for touch detection |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2021-0105080 | 2021-08-10 | ||
| KR1020210105080A KR20230023198A (ko) | 2021-08-10 | 2021-08-10 | 터치 디스플레이 장치 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US17/713,733 Continuation US12159009B2 (en) | 2021-08-10 | 2022-04-05 | Touch display apparatus with light guide plate using infrared light for touch detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023017903A1 true WO2023017903A1 (ko) | 2023-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2021/014616 Ceased WO2023017903A1 (ko) | 2021-08-10 | 2021-10-19 | 터치 디스플레이 장치 |
Country Status (2)
| Country | Link |
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| KR (1) | KR20230023198A (ko) |
| WO (1) | WO2023017903A1 (ko) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090118792A (ko) * | 2008-05-13 | 2009-11-18 | 김현규 | 터치 스크린 장치 |
| KR100942431B1 (ko) * | 2007-12-11 | 2010-02-17 | 주식회사 토비스 | 촬상소자와 광원을 이용한 터치 좌표 인식 방법 및 이를이용한 터치스크린 시스템 |
| KR101009912B1 (ko) * | 2010-03-23 | 2011-01-20 | (주)컴버스테크 | 다층 감광소자를 갖는 양방향 터치 스크린 시스템 |
| US20110148816A1 (en) * | 2009-12-17 | 2011-06-23 | Coretronic Corporation | Optical touch display apparatus |
| KR20120073763A (ko) * | 2010-12-27 | 2012-07-05 | 삼성전자주식회사 | 표시장치 |
-
2021
- 2021-08-10 KR KR1020210105080A patent/KR20230023198A/ko active Pending
- 2021-10-19 WO PCT/KR2021/014616 patent/WO2023017903A1/ko not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100942431B1 (ko) * | 2007-12-11 | 2010-02-17 | 주식회사 토비스 | 촬상소자와 광원을 이용한 터치 좌표 인식 방법 및 이를이용한 터치스크린 시스템 |
| KR20090118792A (ko) * | 2008-05-13 | 2009-11-18 | 김현규 | 터치 스크린 장치 |
| US20110148816A1 (en) * | 2009-12-17 | 2011-06-23 | Coretronic Corporation | Optical touch display apparatus |
| KR101009912B1 (ko) * | 2010-03-23 | 2011-01-20 | (주)컴버스테크 | 다층 감광소자를 갖는 양방향 터치 스크린 시스템 |
| KR20120073763A (ko) * | 2010-12-27 | 2012-07-05 | 삼성전자주식회사 | 표시장치 |
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| KR20230023198A (ko) | 2023-02-17 |
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