WO2006100856A1 - Unite d’affichage - Google Patents

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Publication number
WO2006100856A1
WO2006100856A1 PCT/JP2006/302959 JP2006302959W WO2006100856A1 WO 2006100856 A1 WO2006100856 A1 WO 2006100856A1 JP 2006302959 W JP2006302959 W JP 2006302959W WO 2006100856 A1 WO2006100856 A1 WO 2006100856A1
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WO
WIPO (PCT)
Prior art keywords
image
display device
light
display unit
area
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
Application number
PCT/JP2006/302959
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English (en)
Japanese (ja)
Inventor
Hitoshi Matsumoto
Tomoo Takatani
Masakatsu Tominaga
Toshiaki Fujihara
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Sharp Corp
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Sharp Corp
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Publication of WO2006100856A1 publication Critical patent/WO2006100856A1/fr
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors

Definitions

  • the present invention relates to a display device. More specifically, the present invention relates to a dual image display type display device capable of displaying different images for a plurality of observers.
  • a display device including a viewing angle separation unit such as a parallax barrier has been proposed as a display device that displays different images and videos (hereinafter simply referred to as images) for a plurality of viewpoints.
  • a display device that displays different images for a plurality of observers has been proposed.
  • Such a display device is disclosed in, for example, Japanese Laid-Open Patent Publication No. 2004-206089 (published on July 22, 2004: Patent Document 1).
  • Patent Document 1 discloses a two-parallax display in which a plurality of observers can see different information with the same display power.
  • a display device that displays such a double image
  • the first image and the second image separated through the viewing angle separation unit such as a parallax barrier are observed by different observers. That is, each observer observes a different image.
  • an active matrix liquid crystal display device for example, an active matrix liquid crystal display device can be given.
  • This active matrix type liquid crystal display device has a liquid crystal display panel, and an active matrix substrate of the liquid crystal display panel is provided with a plurality of source bus lines and a plurality of gate bus lines.
  • the active matrix substrate is provided with a plurality of Cs bus lines in parallel with the gate bus lines.
  • a TFT 72 Thin Film Transistor
  • the source electrode of TFT72 is connected to the source bus line
  • the gate electrode is connected to the gate bus line.
  • a pixel electrode 74 is provided in a portion surrounded by the source bus line 70 and the gate bus line 71 where the TFT 72 is not provided. This pixel electrode 74 is connected to the drain electrode of TFT72. Yes.
  • the drain electrode of the TFT 72 is also connected to the Cs bus line 73.
  • the liquid crystal display device When the liquid crystal display device is a transmissive liquid crystal display device, it has a backlight. The light emitted from the backlight passes through the liquid crystal panel and is emitted to the outside. As a result, the observer can observe the image.
  • the light emitted from the knock light cannot be transmitted through the portion provided with the TFT 72, the source bus line 70, the gate bus line 71, and the Cs bus line 73. Therefore, the light emitted from the knocklight passes through the area where only the pixel electrode 74 is provided. A portion through which light emitted from the backlight is transmitted is referred to as an opening.
  • a parallax barrier is disposed at a position closer to the viewer than the pixel electrode 74 provided in a matrix shape.
  • the parallax barrier is composed of noria and slits, and a plurality of noria and slits are alternately arranged at the same interval as the interval between adjacent pixel electrodes 74.
  • FIG. 20 is a diagram schematically illustrating the state of the opening that can be visually recognized for each observation angle when the observer observes the liquid crystal display device including the liquid crystal display panel and the parallax barrier. .
  • this liquid crystal display device has a pixel electrode that displays an image that can be viewed by a viewer who is observing at the left position, and an observer who is observing at the right position.
  • Each pixel electrode that displays a visually recognizable image is an adjacent pixel electrode.
  • the image that can be observed with the left side force can be made different from the image that can be observed from the right side! / .
  • the observer's viewpoint is not always constant and swings to the left and right, so that the observer does not always observe the liquid crystal display device at a constant angle.
  • the viewpoint swings left and right in this way the area of the opening that can be seen through the parallax barrier changes. example For example, if the viewpoint when observing the liquid crystal display device from the front is 0 °, the viewer's visibility is 30 ° on the right side, 15 ° on the right side, 30 ° on the left side, 30 ° on the left side, and 15 ° on the left side.
  • Figure 20 shows.
  • the area of the visible opening changes.
  • the luminance observed by the observer the intensity of light emitted from the liquid crystal panel
  • the change in the area of the observable pixel electrode means that the area of the opening changes, and the intensity of light that can be observed changes.
  • FIG. 17 is a graph showing the relationship between the angle observed by the observer and the area of the opening at each of the left and right angles. As shown in Fig. 17, when observing at + 30 ° and -30 ° positions, the area of the opening visible to the left and right observers is the same, but when the viewpoint changes (especially (In the 0 ° direction), the area of the opening visible at the same angle on the left and right is different.
  • this problem is not limited to the above active matrix liquid crystal display device.
  • organic EL Electro Luminescence
  • inorganic EL display devices LED (Light Emitting Diode) display devices
  • display devices such as FED (Field Emission Display) ⁇ PDP (Plasma a Display Panel), etc.
  • An active matrix display device having a viewing angle separation section that enables display will have the same problems.
  • An object of the present invention is to realize a display device capable of displaying a double image and capable of providing an image with an equivalent display quality to left and right observers. There is to do.
  • a display device emits a light amount corresponding to an input signal to the outside, and a first image display unit that displays a first image
  • a display device comprising: a second image display unit that displays the second image; and a viewing angle separation unit that separates the first image and the second image into different viewing angles.
  • the first image display unit displays the first image
  • the second image display unit displays the second image.
  • Each of these image display units displays an image by controlling the amount of light emitted to the outside in accordance with the input signal.
  • the image display unit is a part that can be visually recognized as a display screen by an observer of the display device. It can also be expressed as an area where the observer can recognize a visual change with the input signal. That is, the image display unit is, for example, a region that transmits light and emits it to the outside, or reflects light and emits it to the outside. For this reason, the image display unit includes not only one that emits light by emitting light but also one that simply transmits or reflects other light and emits it to the outside.
  • the display device includes a viewing angle separation unit, and separates the first image and the second image into different viewing angles. For this reason, different observers can observe the first image or the second image, respectively. In this case, the observer who observes the first image visually recognizes the first image display part, and the observer who observes the second image visually recognizes the second image display part. Will be.
  • the viewing angle separation unit includes a plurality of elongated light-impermeable portions arranged.
  • the viewing angle separating unit has a configuration in which light transmitting units and light non-transmitting units are alternately arranged, and has a so-called striped configuration.
  • the viewing angle separation unit can change the viewing angles so that the first image and the second image can be observed on the left and right with respect to the front of the display device. For example, if the first image can be observed from the left side with respect to the front of the display device, the second image can be observed on the right side with respect to the front of the display device.
  • the first image display unit and the second image display unit divide each image display unit into 2n (n is an integer of 2 or more) regions parallel to the longitudinal direction of the light-impermeable portion, Assuming that the area of the region is LI "'Ln, Rn"' Rl in order of the region force at the left end, the area of each region satisfies the relationship of Equation (1). That is, in the first image display unit and the second image display unit, the area difference between L1 and R1 and the area difference between Ln and Rn are all within (3.5 ⁇ 8Z2n)%. When dividing the image display unit, it is preferable to divide the width of the image display unit into 2 ⁇ equal parts so that the widths of 2n regions are the same.
  • the display device can display an image having the same luminance (quality) to both the right observer and the left observer.
  • the display device includes a first image display unit that displays a first image by emitting a light amount according to an input signal to the outside, and A display device comprising: a second image display unit that displays a second image; and a viewing angle separation unit that separates the first image and the second image into different viewing angles.
  • the corner separation unit includes a plurality of elongated light-impermeable portions, and the amount of light emitted from the first image display unit is equal to the amount of light emitted from the second image display unit. It is.
  • the first image display unit displays the first image
  • the second image display unit Display the second image.
  • Each of these image display units displays an image by controlling the amount of light emitted to the outside in accordance with the input signal.
  • the image display unit is a part that can be visually recognized as a display screen by an observer of the display device. It can also be expressed as an area where the observer can recognize a visual change with the input signal. That is, the image display unit is, for example, a region that transmits light and emits it to the outside, or reflects light and emits it to the outside. For this reason, the image display unit includes not only one that emits light by emitting light but also one that simply transmits or reflects other light and emits it to the outside.
  • the display device includes a viewing angle separation unit, and separates the first image and the second image into different viewing angles. For this reason, different observers can observe the first image or the second image, respectively. In this case, the observer who observes the first image visually recognizes the first image display part, and the observer who observes the second image visually recognizes the second image display part.
  • the viewing angle separation unit includes a plurality of elongated light-impermeable portions arranged.
  • the viewing angle separating unit has a configuration in which light transmitting units and light non-transmitting units are alternately arranged, and has a so-called striped configuration.
  • the viewing angle separation unit can change the viewing angles so that the first image and the second image can be observed on the left and right with respect to the front of the display device. For example, if the first image can be observed from the left side with respect to the front of the display device, the second image can be observed on the right side with respect to the front of the display device.
  • the amount of light emitted from the first image display unit is equal to the amount of light emitted from the second image display unit.
  • “the same amount of light” includes the case where the amount of light emitted from the first image display unit is exactly the same as the amount of light emitted from the second image display unit.
  • the present invention is not limited to this, and includes, for example, a case where the difference between the light amount emitted from the first image display unit and the light amount emitted from the second image display unit is within 10%.
  • the display device It is possible to display an image with the same luminance (quality) for both the left side observer and the left side observer.
  • FIG. 1 is a plan view showing a schematic configuration of an active matrix substrate according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a schematic configuration of a liquid crystal display device according to an embodiment of the present invention.
  • FIG. 3 is a diagram schematically showing a state in which a region in which the pixel electrode according to the first embodiment of the present invention is formed is divided into eight.
  • FIG. 4 is a diagram schematically showing a viewer's visual state when observing a plurality of angular force liquid crystal display devices according to the first embodiment of the present invention.
  • FIG. 5 is a graph showing a relationship between an observation angle and an opening area in the liquid crystal display device according to the first embodiment of the present invention.
  • FIG. 6 is a plan view showing a schematic configuration of an active matrix substrate according to a second embodiment of the present invention.
  • FIG. 7 is a graph showing a relationship between an observation angle and an area of an opening in a liquid crystal display device according to a second embodiment of the present invention.
  • FIG. 8 is a plan view showing a schematic configuration of an active matrix substrate according to a third embodiment of the present invention.
  • FIG. 9 is a graph showing a relationship between an observation angle and an area of an opening in a liquid crystal display device according to a third embodiment of the present invention.
  • FIG. 10 is a plan view showing a schematic configuration of an active matrix substrate according to a fourth embodiment of the present invention.
  • FIG. 11 is a graph showing a relationship between an observation angle and an area of an opening in a liquid crystal display device according to a fourth embodiment of the present invention.
  • FIG. 12 is a plan view showing a schematic configuration of an active matrix substrate according to a fifth embodiment of the present invention.
  • FIG. 13 is a graph showing a relationship between an observation angle and an area of an opening in a liquid crystal display device according to a fifth embodiment of the present invention.
  • FIG. 14 is a plan view showing a schematic configuration of an active matrix substrate according to a sixth embodiment of the present invention.
  • FIG. 15 is a graph showing a relationship between an observation angle and an area of an opening in a liquid crystal display device according to a sixth embodiment of the present invention.
  • FIG. 16 is a diagram showing a schematic configuration of a conventional active matrix substrate used in a first comparative example.
  • FIG. 17 is a graph showing the relationship between the viewing angle and the area of the opening in the conventional liquid crystal display device used in the first comparative example.
  • FIG. 18 is a diagram showing a schematic configuration of an active matrix substrate used in a second comparative example.
  • FIG. 19 is a graph showing a relationship between an observation angle and an opening area in a liquid crystal display device of a second comparative example.
  • FIG. 20 is a diagram schematically showing a state of an opening that can be visually recognized at each observation angle in a conventional liquid crystal display device.
  • FIG. 2 is a cross-sectional view showing a schematic configuration of a liquid crystal display device (display device) 1 according to the present embodiment.
  • the liquid crystal display device 1 according to the present embodiment is a dual image display type display device.
  • the liquid crystal display device 1 includes a liquid crystal panel 2, a parallax barrier (viewing angle separation unit) 3, and a backlight (not shown).
  • the parallax barrier 3 is arranged on the front side of the liquid crystal panel 2 (on the side of the observer observing the liquid crystal display device 1). In other words, the light emitted from the knock light passes through the liquid crystal panel 2 and then passes through the parallax barrier 3. As a result, the liquid crystal display device 1 can display a double image.
  • the liquid crystal panel 2 includes a pair of substrates (counter electrode substrate 4 and active matrix substrate 5) disposed to face each other.
  • the liquid crystal panel 2 includes a liquid crystal layer 6 made of a liquid crystal material (liquid crystal molecules) that is optically modulated by applying a voltage between the pair of substrates 4 and 5. It has the structure which pinched
  • the counter electrode substrate 4 and the active matrix substrate 5 are both made of a light-transmitting substrate.
  • the counter electrode substrate 4 has a configuration in which a common electrode (not shown) is formed on a transparent substrate having glass isotropic force.
  • the active matrix substrate 5 has a configuration in which pixel electrodes are formed in a matrix on a transparent substrate made of glass or the like.
  • the counter electrode substrate 4 and the active matrix substrate 5 are provided with a common electrode and a pixel electrode, and are arranged so that their surfaces face each other.
  • a voltage between the electrodes an electric field in a predetermined direction (for example, a direction substantially perpendicular to the active matrix substrate 5) is generated in the liquid crystal layer 6, and the liquid crystal material of the liquid crystal layer 6 is optically modulated.
  • a predetermined direction for example, a direction substantially perpendicular to the active matrix substrate 5
  • the common electrode of the counter electrode substrate 4 is formed using an electrode material such as ITO (indium stannate). This common electrode can be formed over the entire surface of the counter electrode substrate 4.
  • the pixel electrode of the active matrix substrate 5 can also be formed using an electrode material such as ITO.
  • a plurality of pixel electrodes are formed in a matrix. The detailed configuration of the active matrix substrate 5 will be described later.
  • the parallax barrier 3 is disposed closer to the viewer than the liquid crystal panel 2, and gives the viewer a plurality of viewing angles.
  • the parallax barrier 3 has a V-shaped, striped (stripe) configuration in which long noria that blocks light and slits that transmit light are alternately arranged. Yes.
  • the noria and slits of the parallax barrier 3 are arranged at regular intervals. Although this interval may be the same as the interval between adjacent pixel electrodes, it is preferable to set the interval so that the opening can be seen best from the viewpoint of the observer.
  • the parallax barrier 3 may be arranged at an arbitrary position where a plurality of viewing angles can be given to the observer, and the position can be appropriately set according to the specification.
  • the position where the liquid crystal panel 2 is observed from the front is 0 °
  • the left and right 30 ° positions are arranged so as to be the optimum observation positions.
  • the column of pixel electrodes arranged in the same direction as the longitudinal direction of the barrier or slit of the parallax barrier 3 displays an image for the right observer or the left observer.
  • a pixel electrode column adjacent to a pixel electrode column that displays an image to an observer displays an image to the left observer.
  • a pixel electrode column adjacent to a pixel electrode column that displays an image to the left observer displays an image to the right observer.
  • an image or video displayed by the liquid crystal display device is simply referred to as an image regardless of whether it is a still image or a moving image.
  • the pixel electrodes arranged in a matrix form include pixel electrode columns that display to the viewer located on the right side and pixel electrodes that display to the viewer located on the left side.
  • the parallax barrier is arranged so that the left and right observers can observe each corresponding image satisfactorily while being driven so that the columns are alternately arranged.
  • FIG. 1 is a plan view showing a schematic configuration of the active matrix substrate 5. As shown in FIG. 1, on the above active matrix substrate 5, a source bus line 7, a gate bus line 8, a pixel electrode 9, a source electrode 10, a gate electrode 11, a drain electrode 12, and an auxiliary capacitor are provided. Cs bus line 13 (storage capacitor) is formed!
  • the source bus line 7 and the gate bus line 8 are orthogonal to each other, and a TFT 14 (thin film transistor) of a three-terminal element including the source electrode 10, the gate electrode 11, and the drain electrode 12 is formed near the gate bus line 8.
  • the pixel electrode 9 is formed adjacent to the TFT 14 and is formed in a so-called matrix form on the active matrix substrate 5. Further, the source electrode 10 is electrically connected to the source bus line 7, the gate electrode 11 is electrically connected to the gate nose line 8, and the drain electrode 12 is electrically connected to the pixel electrode 9.
  • the active matrix substrate 5 uses the TFT 14 as a switching element, and the data (voltage) from the source bus line 7 is converted into the source electrode 10 and the drain electrode 12 by the signal (address signal) given to the gate bus line 8. Is written into the pixel electrode 9 via Thereby, the orientation of the liquid crystal material existing between the counter electrode substrate 4 and the amount of light transmitted through the liquid crystal panel 2 is controlled.
  • the pixel electrode 9 is formed using a transparent electrode material such as ITO. For this reason, the light emitted from the knocklight is the portion where the pixel electrode 9 is formed. Can be transmitted.
  • the source bus line 7, the gate bus line 8, the Cs bus line 13, and the TFT 14 are made of an opaque material, so that the light emitted from the knock light is transmitted through the portion where these are formed. I can't. That is, in the active matrix substrate 5, the light transmitting region is a region excluding a portion that does not transmit light in the region where the pixel electrode 9 is formed (shaded portion shown in FIG. 3).
  • the region of the active matrix substrate 5 that transmits light is referred to as an opening (first image display unit / second image display unit) 16.
  • the TFT 14 is formed along the gate bus line 8, and the intersection of the source bus line 7 and the gate bus line 8 as in the conventional configuration. It is not formed nearby. For this reason, the area surrounded by the source bus line 7 and the gate bus line 8 and excluding the TFT 14 is a quadrilateral (rectangular), and the shape of the pixel electrode formed in this area may be rectangular. it can.
  • the Cs bus line 13 is provided with the central portion of the pixel electrode 9 parallel to the gate bus line 8, and the drain electrode 12 is provided at the central portion of the pixel electrode 9. Accordingly, the opening 16 (the region where the pixel electrode 9 formation region force is also excluded from the light non-transparent portion) has a line-symmetric shape with respect to the longitudinal direction of the pixel electrode 9. In the present embodiment, the power provided with the Cs bus line 13 is provided.
  • the present invention may be configured without the Cs bus line 13.
  • the area and the area of the opening in the right region can be made the same (hereinafter, “the area of the opening” may be referred to as “opening area”).
  • the luminance (light intensity) that can be observed by the left observer is the same as the luminance (light intensity) that can be observed by the right observer.
  • FIG. 3 shows a region where the pixel electrode 9 is formed in a direction parallel to the longitudinal direction of the barrier 3a of the parallax barrier 3 ( ⁇ direction shown in FIG. 3), that is, in a direction parallel to the center line.
  • FIG. 3 shows typically the state divided into 8 (divided into 8 equal parts).
  • the center line of the eight divided areas For the four areas on the left side as a reference, L1 'L2'L3 • L4 in order from the left edge toward the center line.
  • the 4 areas on the right with respect to the center line are designated as R1 'R2'R3' R4 in order from the right end to the center line.
  • L1 to L4 and R1 to R4 may represent numbers for specifying each region, and may represent the opening area of each region (hereinafter the same).
  • FIG. 4 is a diagram schematically showing the observer's visual recognition state when the liquid crystal display device is also observed with a plurality of angular forces. Specifically, Fig. 4 shows that when the liquid crystal display device 1 is observed from the front, 0 °, when this is 0 °, and from the right and 15 ° and 30 ° to the front (+ 15 (°, + 30 °), and a cross-sectional view showing the observable area when viewing from the left 15 ° and 30 ° to the front (-15 °, -30 °), and the state of visibility of the opening Show a plan view showing!
  • the left 30 ° position and the right 30 ° position are optimum observation positions. Accordingly, when viewed from a position of ⁇ 30 ° (right visual field and left visual field), the visible opening area of the opening corresponding to each image is the largest.
  • Reference numeral 15a shown in FIG. 4 denotes a region where a pixel electrode for displaying an image for the right observer is provided. For convenience of explanation, an aperture in this region is shown. To do.
  • 15b shown in FIG. 4 shows an area in which a pixel electrode for displaying an image for the left observer is provided. For convenience of explanation, an opening in this area is shown. To do. That is, the opening 15a and the opening 15b are regions similar to the opening 16 shown in FIG. In addition, a light non-transmissive region exists between the opening 15a and the opening 15b. In other words, the observable opening 15a has the largest opening area when + 30 ° positional force is also observed, and the observable opening 15b has the largest opening area when observing from the ⁇ 30 ° position. It is summer.
  • the region of the opening 15a ′ 15b that can be visually recognized changes. For example, if the viewpoint moves from a position of + 30 ° to a position of + 15 ° or moves from a position of + 15 ° to a position of 0 °, a part of the opening 15a cannot be visually recognized. Part of the opening 15b is visible Become.
  • Table 1 shows opening areas in the respective regions L1 to L4 and R1 to R4.
  • Table 1 The opening area shown in Table 1 is the area where only the pixel electrode 9 is formed in each of the above regions (L1 to L4, R1 to R4).
  • the source bus line 7 and the gate bus line 8 do not transmit light. This does not include the area where the Cs bus line 13 and TFT 14 are formed (light-impermeable portion).
  • L1 and Rl, L2 and R2, L3 and R3, L4 and R4 have the same opening area.
  • the opening area that can be visually recognized by the observer observing from the left side and the opening area that can be visually recognized by the observer observing from the right side are those when these observers observe from the same left and right angles. Will be the same.
  • the liquid crystal display device 1 can display images of the same quality (luminance) to the left and right observers when viewed from the front at the same left and right angles.
  • FIG. 5 is a graph showing the relationship between the viewing angle and the opening area in the liquid crystal display device 1. As shown in Fig. 5, it can be seen that the opening area is symmetrical with respect to the case where the viewpoint is 0 °. That is, it can be seen that the liquid crystal display device 1 can display images of the same quality (luminance) at the same left and right angles.
  • the opening is divided into eight, and the pixel electrode 9 and the opening area of each of the left and right L1 to L4 regions and the corresponding opening area of each of the R1 to R4 regions are the same.
  • the present invention is not limited to the configuration in which the areas L1 to L4 and the corresponding areas R1 to R4 are exactly the same. It is sufficient that the area difference between the openings of these regions is within a certain range. Specifically, the ratio (%) of the area difference with respect to the total area of the opening is constant in the left-right symmetric region of the opening divided into eight (in this embodiment, for example, L1 and R1, or L2 and R2). It may be within the range.
  • the above-mentioned fixed range is most preferably 0% (that is, the area difference between the symmetrical areas is exactly the same), but for example, when the opening is divided into 8 areas
  • the difference should be within 3.5%. If the area difference is within 3.5%, the display quality at the same angle on the left and right can be made equal, and if the area difference exceeds 3.5%, the display quality at the same angle on the left and right It becomes impossible to keep it equal.
  • the opening is divided into 8 parts, the left area of the left four areas is also L1 to L4 in order, and the right area of the four areas is R1 to R4 in order of the right end force. Is an integer
  • the opening areas of L1 to L4 and the corresponding opening areas of R1 to R4 are exactly the same, so the difference in the opening area calculated by the above equation (3) Is 0%, and it can be seen that there is no difference in luminance that can be seen at the same angle on the left and right.
  • 0% is most preferable within 3.5%, but the smaller the ratio, the more preferable, for example, within 3.0%, 1. It becomes more preferable as it is within 5% and within 1.0%.
  • the opening is divided into eight parts, but the present invention is not limited to this. And any number of divisions (N divisions; N is an even number greater than or equal to 4). Even in this case, it is only necessary that the ratio of the area difference between the regions that are left-right symmetric in the N-divided openings is within the certain range.
  • the opening is divided into 2n, the opening area of the left n region is Ll to Ln in order of the left end force, and the opening area of the right n region is Rl to Rn in order of the right end force.
  • m is from 1 to n. It may be in the range represented by (integer). As n increases, the number of divisions increases. As a result, the area in one region decreases, so the area difference in each region that is symmetrical must be reduced. In the case of 8 divisions, it will be within 3.5%, but in the case of 16 divisions, it will be within 1.75%.
  • the present invention is based on the premise that the left and right regions are compared by dividing into four or more divisions.
  • a transmissive liquid crystal display device has been described as an example.
  • the present invention is not limited to this, and may be applied to, for example, a transflective liquid crystal display device. be able to.
  • the transflective liquid crystal display device has both a portion that transmits the light of the knocklight (transmission portion) and a portion that reflects external light (reflection portion) as the light opening.
  • the transmission portion and the reflection portion opening as a whole have the above formula (1) and Any relationship that satisfies equation (2) is acceptable. Also in this case, as in the present embodiment, a liquid crystal display device capable of displaying images of the same quality (luminance) at the same left and right angles can be provided.
  • a liquid crystal display device has been described as an example of a display device, but the present invention is not limited to this.
  • the present invention is a display device that displays by transmitting light from the side opposite to the observer, a display device that displays by light emitted by itself, and the like in an area where the observer can visually recognize the light. Any display device having an area that blocks light can be applied.
  • an active display device using TFT or the like can be exemplified.
  • the present invention can be applied to both a color display device and a monochrome display device.
  • FIG. 1 The following describes the second embodiment of the present invention with reference to FIGS. 2, 6, and 7.
  • FIG. 2 The following describes the second embodiment of the present invention with reference to FIGS. 2, 6, and 7.
  • the present embodiment is different from the first embodiment only in the shape of the opening, and the other configurations are the same. Therefore, in the present embodiment, the opening is mainly used. explain.
  • the same members as those in Embodiment 1 are denoted by the same reference numerals, and the description thereof is omitted.
  • the liquid crystal display device 20 includes a liquid crystal panel 2, a parallax barrier 3, and a backlight (not shown).
  • the configuration of the liquid crystal panel 2 and the parallax barrier 3 and the positional relationship between them are the same as those in the first embodiment.
  • FIG. 6 is a plan view showing a schematic configuration of the active matrix substrate 5 according to the present embodiment. As shown in FIG. 6, also in the present embodiment, on the active matrix substrate 5, the source bus line 7, the gate bus line 8, the pixel electrode 9, the source electrode 10, the gate electrode 11, the drain electrode 12, and the Cs bus line are provided. 13 is formed. The configuration and positional relationship of these members are the same as in the first embodiment.
  • light shielding is performed in a region where the pixel electrode 9 is formed.
  • a portion 21a and a light shielding portion 21b are provided.
  • the light shielding portion 21a and the light shielding portion 21b are formed using a material that does not transmit light (light impermeability). That is, the pixel electrode 9 is formed except for the portion where the source bus line 7, the gate bus line 8, the TFT 14, the Cs bus line 13, the light shielding part 21a and the light shielding part 21b are formed in the active matrix substrate 5.
  • the part that is, the part where only the pixel electrode 9 is formed) becomes an opening.
  • the light shielding part 21 a is provided in contact with one long side of the pixel electrode 9, and the light shielding part 21 b is provided in contact with the other long side of the pixel electrode 9.
  • the light shielding part 21a and the light shielding part 21b are both rectangular and have the same shape, and are arranged such that their longitudinal directions are parallel to the longitudinal direction of the pixel electrode 9. Further, the light shielding part 21 a and the light shielding part 21 b are provided on a substantially diagonal line of the pixel electrode 9. That is, the light shielding part 21 a and the light shielding part 21 b are arranged at positions that are point-symmetric with respect to the center of the pixel electrode 9.
  • the opening is divided into eight parts, and the center line force is divided into four regions on the left and right sides, L1 to L4 from the left end toward the center line, and R1 to R4 from the right end toward the center line.
  • R4 Table 3 shows the area of the opening in each of the L1 to L4 and R1 to R4 areas and the area difference between the left and right areas with respect to the total opening area. As shown in Table 3, L1 and Rl, L2 and R2, L3 and R3, L4 and R4 each have the same opening area.
  • the area of the opening that can be seen by the observer observing from the left side and the area of the opening that can be seen by the observer observing from the right side are determined by each of these observers. It becomes the same when observing from the same angle on the left and right.
  • the display device 20 can display images of equivalent quality (luminance) for the left and right viewers looking at the same left and right angles from the front.
  • FIG. 7 is a graph showing the relationship between the viewing angle and the area of the opening in the liquid crystal display device 20. As shown in FIG. 7, it can be seen that the liquid crystal display device 20 has the same visible opening area when viewed from the same angle on the left and right, with the viewpoint being 0 °. That is, FIG. 7 also shows that the liquid crystal display device 20 can display images with the same luminance at the same left and right angles.
  • FIG. 1 The following describes the third embodiment of the present invention with reference to FIGS. 2, 8, and 9.
  • FIG. 2 The following describes the third embodiment of the present invention with reference to FIGS. 2, 8, and 9.
  • Embodiments 1 and 2 are different from Embodiments 1 and 2 only in the shape of the opening, and the other configurations are the same. Therefore, in this embodiment, the opening is mainly used. The part will be explained.
  • the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the liquid crystal display device 30 includes a liquid crystal panel 2, a parallax barrier 3, and a backlight (not shown).
  • the configuration of the liquid crystal panel 2 and the parallax barrier 3 and the positional relationship between them are the same as those in the first embodiment.
  • FIG. 8 is a plan view showing a schematic configuration of the active matrix substrate 5 according to the present embodiment.
  • the source bus line 7, the gate bus line 8, the pixel electrode 9, the source electrode 10, the gate electrode 11, the drain electrode 12, and the Cs bus line are provided on the active matrix substrate 5, the source bus line 7, the gate bus line 8, the pixel electrode 9, the source electrode 10, the gate electrode 11, the drain electrode 12, and the Cs bus line are provided. 13 is formed. The configuration and positional relationship of these members are the same as in the first embodiment.
  • a light shielding part 31a and a light shielding part 31b for shielding light are provided in a region where the pixel electrode 9 is formed.
  • the light shielding portion 31a and the light shielding portion 31b are formed using a light-impermeable material.
  • the pixel electrode 9 is formed except for the portion of the active matrix substrate 5 where the source bus line 7, the gate bus line 8, the TFT 14, the Cs bus line 13, the light shielding part 31a and the light shielding part 31b are formed.
  • the part that is formed becomes the opening part (that is, the part where only the pixel electrode 9 is formed).
  • the light shielding part 3 la is provided at a corner of the region where the pixel electrode 9 is formed, and a light shielding part 31 b is provided at a corner diagonal to the corner.
  • the light shielding part 31a and the light shielding part 31b are both rectangular and have the same shape, and are arranged such that their longitudinal directions are parallel to the lateral direction of the pixel electrode 9. That is, the light shielding part 31a and the light shielding part 31b are arranged at positions that are point-symmetric with respect to the center of the pixel electrode 9. Further, both the light shielding part 3 la and the light shielding part 31 b are arranged so as to straddle both the left side area and the right side area of the pixel electrode 9.
  • the liquid crystal display device 30 including the active matrix substrate 5 having the above-described configuration the area of the opening that can be seen by an observer who observes from the same left and right angles with respect to the front surface of the liquid crystal panel 2 (that is, the observer Will be described.
  • the opening is divided into eight parts, and the center line force is divided into four left and right regions L1 to L4 from the left end to the centerline, and R1 to R4 from the right end to the centerline.
  • Table 4 shows the area of the opening in each of the L1 to L4 and R1 to R4 areas and the area difference between the left and right areas relative to the total opening area. As shown in Table 4, L1 and Rl, L2 and R2, L3 and R3, L4 and R4 each have the same opening area.
  • FIG. 9 is a graph showing the relationship between the viewing angle and the opening area in the liquid crystal display device 30. As shown in FIG. 9, it can be seen that the liquid crystal display device 30 has the same visible opening area when viewed from the same angle on the left and right, with the viewpoint being 0 °. That is, FIG. 9 also shows that the liquid crystal display device 30 can display images with the same luminance at the same left and right angles.
  • this embodiment can also be applied to a display device similar to that in Embodiment 1.
  • the present embodiment is different from the first to third embodiments only in the shape of the opening, and the other configurations are the same.
  • the opening is mainly used. The part will be explained.
  • the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the liquid crystal display device 40 includes a liquid crystal panel 2, a parallax barrier 3, and a backlight (not shown).
  • the configuration of the liquid crystal panel 2 and the parallax barrier 3 and the positional relationship between them are the same as those in the first embodiment.
  • FIG. 10 is a plan view showing a schematic configuration of the active matrix substrate 5 according to the present embodiment. As shown in FIG. 10, in this embodiment also, on the active matrix substrate 5, the source bus line 7, the gate bus line 8, the pixel electrode 9, the source electrode 10, and the gate electrode 1 are provided. 1. A drain electrode 12 and a Cs bus line 13 are formed. The configuration and positional relationship of these members are the same as in the first embodiment.
  • a light shielding part 41a, a light shielding part 41b, a light shielding part 41c, and a light shielding part 41d for shielding light are provided in a region where the pixel electrode 9 is formed.
  • the light shielding portions 41a to 41d are formed using a light-impermeable material. That is, in the active matrix substrate 5, the source bus line 7, the gate bus line 8, the TFT 14, the Cs bus line 13 and the light shielding portions 41a to 4Id are formed, except for the portion where the pixel electrode is formed. When 9 is formed, this portion becomes an opening (that is, a portion where only the pixel electrode 9 is formed).
  • the light shielding portions 41a to 41d are provided at each corner of the region where the pixel electrode 9 is formed. Specifically, the light shielding part 41a and the light shielding part 41c are provided on the diagonal line of the region where the pixel electrode 9 is formed, and the light shielding part 41b and the light shielding part 41d are provided on a diagonal line different from the diagonal line. Being
  • the light shielding part 41a and the light shielding part 41c are both rectangular and have the same shape, and are arranged so that the long direction thereof is parallel to the short direction of the pixel electrode 9.
  • the light shielding part 41 b and the light shielding part 41 d are both rectangular and have the same shape, and are arranged so that their longitudinal directions are parallel to the longitudinal direction of the pixel electrode 9. That is, the light shielding portions 41a to 41d are arranged at positions that are point-symmetric with respect to the center of the pixel electrode 9.
  • the liquid crystal display device 40 including the active matrix substrate 5 having the above-described configuration the area of the opening that can be viewed by an observer who observes from the same left and right angles with respect to the front surface of the liquid crystal panel 2 (that is, the observer Will be described.
  • the opening is divided into eight parts, and the center line force is divided into four regions on the left and right, L1 to L4 from the left end toward the centerline, and R1 to R4 from the right end to the centerline.
  • R4 Table 5 shows the area difference between the left and right areas with respect to the area of the opening and the total opening area in each of the L1 to L4 and R1 to R4 areas. As shown in Table 5, L1 and Rl, L2 and R2, L3 and R3, L4 and R4 each have the same opening area.
  • the area of the opening that can be seen by the observer observing from the left side and the area of the opening that can be seen by the observer observing from the right side are determined by each of these observers. It becomes the same when observing from the same angle on the left and right.
  • FIG. 11 is a graph showing the relationship between the viewing angle and the area of the opening in the liquid crystal display device 40. As shown in FIG. 11, when the liquid crystal display device 40 is observed at the same left and right angles with the viewpoint being 0 °, it can be seen that the areas of the visible openings are the same. That is, FIG. 11 also shows that the liquid crystal display device 40 can display images with the same luminance at the same left and right angles.
  • the present embodiment can also be applied to the same display device as that of the first embodiment.
  • the present embodiment is different from the first to fourth embodiments only in the shape of the opening, and the other configurations are the same. Therefore, in the present embodiment, the opening is mainly used. The part will be explained.
  • the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the liquid crystal display device 50 includes a liquid crystal panel 2, a parallax barrier 3, and a backlight (not shown).
  • the configuration of the liquid crystal panel 2 and the parallax barrier 3 and the positional relationship between them are the same as in the first embodiment.
  • FIG. 12 is a plan view showing a schematic configuration of the active matrix substrate 5 according to the present embodiment. As shown in FIG. 12, even in the present embodiment, on the active matrix substrate 5, the source bus line 7, gate bus line 8, pixel electrode 9, source electrode 10, gate electrode 11 1, drain electrode 12, Cs bus Line 13 is formed. The configuration and positional relationship of these members are the same as in the first embodiment.
  • a light shielding portion 51a and a light shielding portion 51b for shielding light are provided in the region where the pixel electrode 9 is formed.
  • the light shielding part 51a and the light shielding part 51b are formed using a light-impermeable material. That is, the pixel electrode 9 is formed except for the portion of the active matrix substrate 5 where the source bus line 7, the gate bus line 8, the TFT 14, the Cs bus line 13, the light shielding part 51a and the light shielding part 51b are formed.
  • the part that is formed becomes the opening part (that is, the part where only the pixel electrode 9 is formed).
  • the light-shielding portion 5la is provided at a corner of the region where the pixel electrode 9 is formed, and a light-shielding portion 51b is provided at a corner diagonal to the corner.
  • the light-shielding part 5 la and the light-shielding part 51 b are both rectangular and have the same shape, and are arranged so that their longitudinal directions are the same as the lateral direction of the pixel electrode. That is, the light shielding part 51a and the light shielding part 51b are arranged at positions that are point-symmetric with respect to the center of the pixel electrode. Further, the light shielding part 51a and the light shielding part 51b are both arranged so that one short side overlaps the outer periphery of the pixel electrode 9 and the other short side overlaps the center line.
  • the liquid crystal display device 50 including the active matrix substrate 5 having the above-described configuration the area of the opening that can be viewed by the observer who observes from the same left and right angles with respect to the front surface of the liquid crystal panel 2 (that is, the observer can observe) (Luminance) will be described.
  • the opening is divided into eight parts, and the center line force is divided into four left and right regions L1 to L4 from the left end to the centerline, and R1 to R4 from the right end to the centerline.
  • Table 6 shows the area difference between the left and right areas with respect to the area of the opening and the total opening area in each of the L1 to L4 and R1 to R4 areas.
  • L1 and Rl, L2 and R2, L3 and R3 have the same opening area, but L4 and R4 have different opening areas. This is because a part of the light shielding part 51b overlaps a part of the drain electrode 12 (light opaque part).
  • FIG. 13 is a graph showing the relationship between the viewing angle and the area of the opening in the liquid crystal display device 50. As shown in FIG. 13, in the liquid crystal display device 50, it can be seen that the area of the opening that can be visually recognized is substantially the same when observed at the same left and right angles with the viewpoint being 0 °. That is, FIG. 13 also shows that the liquid crystal display device 50 can display images with the same luminance at the same left and right angles.
  • the opening portion that changes as the viewpoint moves is changed.
  • the present invention can be applied to the same display device as in the first embodiment.
  • the present embodiment is different from the first to fifth embodiments only in the shape of the opening, and the other configurations are the same. Therefore, in the present embodiment, the opening is mainly used. The part will be explained.
  • the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the liquid crystal display device 60 according to the present embodiment includes a liquid crystal panel 2, a parallax barrier 3, and a backlight (not shown).
  • the configuration of the liquid crystal panel 2 and the parallax barrier 3 and the positional relationship between them are the same as in the first embodiment.
  • FIG. 14 is a plan view showing a schematic configuration of the active matrix substrate 5 according to the present embodiment. As shown in FIG. 14, even in the present embodiment, on the active matrix substrate 5, the source bus line 7, gate bus line 8, pixel electrode 9, source electrode 10, gate electrode 11 1, drain electrode 12, Cs bus Line 13 is formed. The configuration and positional relationship of these members are the same as in the first embodiment.
  • the light shielding part 61a and the light shielding part 61b for shielding light are provided in the region where the pixel electrode 9 is formed.
  • the light shielding portion 61a and the light shielding portion 61b are formed using a light-impermeable material. That is, the pixel electrode 9 is formed except for the portion of the active matrix substrate 5 where the source bus line 7, the gate bus line 8, the TFT 14, the Cs bus line 13, the light shielding part 61a and the light shielding part 61b are formed.
  • the part that is formed becomes the opening part (that is, the part where only the pixel electrode 9 is formed).
  • the light shielding part 6 la is provided in contact with one long side of the pixel electrode 9, and the light shielding part 6 lb is provided in contact with the other long side of the pixel electrode 9.
  • the light shielding part 6 la and the light shielding part 61b are both rectangular and have the same shape.
  • the light shielding part 61a is arranged so that its longitudinal direction is the same as the longitudinal direction of the pixel electrode, and the light shielding part 61b is arranged so that its longitudinal direction is the same as the lateral direction of the pixel electrode.
  • the light shielding part 61a and the light shielding part 61b are not point-symmetric with respect to the center of the pixel electrode 9! Placed in position.
  • the liquid crystal display device 60 including the active matrix substrate 5 having the above-described configuration the area of the opening that can be viewed by the observer who observes from the same left and right angles with respect to the front surface of the liquid crystal panel 2 (that is, the observer can observe) (Luminance) will be described.
  • the opening is divided into eight parts, and the center line force is also divided into four regions on the left and right, L1 to L4 from the left end toward the center line, and R1 to R4 from the right end to the center line.
  • Table 7 shows the area of the opening in each of the L1 to L4 and R1 to R4 areas and the area difference between the left and right areas with respect to the total opening area. As shown in Table 7, L4 and R4 are the same In contrast to the opening area, L1 and Rl, L2 and R2, L3 and R3 each have a different opening area.
  • the liquid crystal display device 60 displays images of the same quality (brightness) for the left and right observers when viewed from the same angle from the front to the left. can do.
  • FIG. 15 is a graph showing the relationship between the viewing angle and the area of the opening in the liquid crystal display device 60. As shown in FIG. 15, in the liquid crystal display device 60, it can be seen that the area of the opening that can be visually recognized is almost the same when observed at the same left and right angles with the viewpoint being 0 °. That is, it can be seen from FIG. 15 that the liquid crystal display device 60 can display images having the same luminance at the same left and right angles.
  • the opening portion that changes as the viewpoint moves is changed.
  • this embodiment can be applied to a display device similar to that of the first embodiment.
  • FIG. 16 is a diagram showing a schematic configuration of a conventional active matrix substrate used in this comparative example. As shown in FIG. 16, this comparative example is different from the first to sixth embodiments in the position where the TFT is formed and the shape of the opening.
  • the active matrix substrate has the pixel electrode 74 formed except the portion where the source bus line 70, the gate bus line 71, the TFT 72, and the Cs bus line 73 are formed.
  • the part becomes an opening.
  • the shape of the opening of this comparative example is significantly different from that of Embodiment 1 or 6.
  • the liquid crystal display device including the active matrix substrate provided with the pixel electrode 74 having the above-described configuration, the area of the opening that can be viewed by the observer viewing from the same left and right angles with respect to the front surface of the liquid crystal panel (that is, the observation Will be described.
  • the opening is divided into eight parts, and the center line force is divided into four left and right regions L1 to L4 from the left end to the centerline, and R1 to R4 from the right end to the centerline.
  • Table 8 shows the area difference between the left and right areas with respect to the area of the opening and the total opening area in each of the L1 to L4 and R1 to R4 areas. As shown in Table 8, the opening areas of the corresponding regions, L1 and Rl, L2 and R2, L3 and R3, L4 and R4 are all different.
  • FIG. 17 is a graph showing the relationship between the viewing angle and the area of the opening in the liquid crystal display device of this comparative example.
  • this liquid crystal display device has a large difference in the area of the visible opening when viewed from the same angle on the left and right, with the viewpoint at 0 °. In other words, it can be seen that this liquid crystal display device cannot display an image having the same luminance at the same left and right angles.
  • FIG. 18 is a diagram showing a schematic configuration of an active matrix substrate used in this comparative example. As shown in FIG. 18, this comparative example differs from Embodiments 1 to 6 above in that the position where the TFT is formed and the shape of the opening are the same. is there.
  • the active matrix substrate has the pixel electrode 84 formed except for the portion where the source bus line 80, the gate bus line 81, the TFT 82, and the Cs bus line 83 are formed.
  • the part becomes an opening.
  • the shape of the opening of this comparative example is significantly different from that of Embodiment 1 or 6.
  • the liquid crystal display device including the active matrix substrate provided with the pixel electrode 84 having the above-described configuration, the area of the opening that can be viewed by an observer who observes from the same left and right angles with respect to the front surface of the liquid crystal panel (that is, the observation Will be described.
  • the opening is divided into eight parts, and the center line force is also divided into four regions on the left and right, L1 to L4 from the left end toward the center line, and R1 to R4 from the right end to the center line.
  • Table 9 shows the area of the opening in each of the L1 to L4 and R1 to R4 areas and the area difference between the left and right areas with respect to the total opening area. As shown in Table 9, the areas of the corresponding regions, L1 and Rl, L2 and R2, L3 and R3, L4 and R4, are all different.
  • This liquid crystal display device displays images of the same quality (brightness) to the left and right viewers looking at the same left and right angles from the front. I can't do it.
  • FIG. 19 is a graph showing the relationship between the viewing angle and the area of the opening in the liquid crystal display device of this comparative example.
  • this liquid crystal display device has a large difference in the area of the visible opening when viewed from the same angle on the left and right with the viewpoint at 0 ° as the center. In other words, it can be seen that this liquid crystal display device cannot display an image having the same luminance at the same left and right angles.
  • the display device emits the amount of light according to the input signal to the outside, so that the first image display unit and the second image display unit display the first image.
  • a display device including a second image display unit for displaying the first image and a viewing angle separation unit for separating the first image and the second image into different viewing angles.
  • a plurality of long light-opaque portions arranged, and the first image display portion and the second image display portion include 2n pieces of each image display portion parallel to the longitudinal direction of the light-opaque portion ( n is an integer greater than or equal to 2, and the area of each region is expressed by the formula (1) when the area force at the left end is also Ll to Ln and Rn "'Rl in order.
  • the first image display unit displays the first image
  • the second image display unit displays the second image.
  • Each of these image display units displays an image by controlling the amount of light emitted to the outside in accordance with the input signal.
  • the image display unit is a part that can be visually recognized as a display screen by an observer of the display device. It can also be expressed as an area where the observer can recognize a visual change with the input signal. That is, the image display unit is, for example, a region that transmits light and emits it to the outside, or reflects light and emits it to the outside. For this reason, the image display unit includes not only one that emits light by emitting light but also one that simply transmits or reflects other light and emits it to the outside.
  • the display device includes a viewing angle separation unit, and separates the first image and the second image into different viewing angles. For this reason, different observers can observe the first image or the second image, respectively. In this case, the observer who observes the first image visually recognizes the first image display part, and the observer who observes the second image visually recognizes the second image display part.
  • the viewing angle separation unit includes a plurality of elongated light-impermeable portions.
  • the viewing angle separating unit has a configuration in which light transmitting units and light non-transmitting units are alternately arranged, and has a so-called striped configuration.
  • the viewing angle separation unit can change the viewing angles so that the first image and the second image can be observed on the left and right with respect to the front of the display device. For example, if the first image can be observed from the left side with respect to the front of the display device, the second image can be observed on the right side with respect to the front of the display device.
  • the first image display unit and the second image display unit divide each image display unit into 2n regions (n is an integer of 2 or more) parallel to the longitudinal direction of the light-impermeable portion.
  • the left side of the area of the area Assuming LI "'Ln, Rn"' Rl in the order of the region force, the area of each region satisfies the relationship of equation (1). That is, in the first image display unit and the second image display unit, the area difference between L1 and R1 and the area difference between Ln and Rn are all within (3.5 ⁇ 8Z2n)%.
  • the display device can display an image having the same luminance (quality) to both the right observer and the left observer.
  • the display device as described above, the first image display unit that displays the first image by projecting the amount of light according to the input signal to the outside, and A display device comprising: a second image display unit that displays a second image; and a viewing angle separation unit that separates the first image and the second image into different viewing angles.
  • the separation unit includes a plurality of elongated light-impermeable portions arranged, and the amount of light emitted from the first image display unit is equal to the amount of light emitted from the second image display unit. Yes.
  • the first image display unit displays the first image
  • the second image display unit displays the second image.
  • Each of these image display units displays an image by controlling the amount of light emitted to the outside in accordance with the input signal.
  • the image display unit is a part that can be visually recognized as a display screen by an observer of the display device. It can also be expressed as an area where the observer can recognize a visual change with the input signal. That is, the image display unit is, for example, a region that transmits light and emits it to the outside, or reflects light and emits it to the outside. For this reason, the image display unit includes not only one that emits light by emitting light but also one that simply transmits or reflects other light and emits it to the outside.
  • the display device includes a viewing angle separation unit, and separates the first image and the second image into different viewing angles. For this reason, different observers can observe the first image or the second image, respectively.
  • the observer observing the first image is the first image table.
  • the viewing part is visually recognized, and an observer who observes the second image visually recognizes the second image display part.
  • the viewing angle separation unit includes a plurality of elongated light-impermeable portions arranged.
  • the viewing angle separating unit has a configuration in which light transmitting units and light non-transmitting units are alternately arranged, and has a so-called striped configuration.
  • the viewing angle separation unit can change the viewing angles so that the first image and the second image can be observed on the left and right with respect to the front of the display device. For example, if the first image can be observed from the left side with respect to the front of the display device, the second image can be observed on the right side with respect to the front of the display device.
  • the light amount emitted from the first image display unit is equal to the light amount emitted from the second image display unit.
  • the same amount of light includes the case where the amount of light emitted from the first image display unit is exactly the same as the amount of light emitted from the second image display unit.
  • the present invention is not limited to this, and includes, for example, a case where the difference between the light amount emitted from the first image display unit and the light amount emitted from the second image display unit is within 10%.
  • the display device can display an image having the same luminance (quality) to both the right observer and the left observer.
  • the light emitted from the first image display unit and the light emitted from the second image display unit have the same left and right angles with respect to the front direction of the display device. It is preferable that the light is emitted. According to the above configuration, even when the observer of the first image and the observer of the second image observe from the same left and right angles with respect to the front of the display device, the display device In contrast, it is possible to display an image having the same luminance (quality).
  • the first image display unit and the second image display unit include 2n pieces (n is an integer of 2 or more) parallel to the longitudinal direction of the light-impermeable portion. ) And the area force of the left side is also Ll Ln, Rn "'Rl in order. The area of each region is the formula (1)
  • the first image display unit and the second image display unit both have an area difference between L1 and R1 ... All area differences between Ln and Rn are within (3.5 X 8Z2n)% Therefore, it is possible to emit light having the same amount of light to each observer observing at the same left and right angles with respect to the front of the display device. As a result, the display device can display an image having the same luminance (quality) to both the right observer and the left observer.
  • the area of each region of the first image display unit and the second image display unit is expressed by equation (2).
  • the first image display unit and the second image display unit both have an area difference between L1 and R1 and an area difference between Ln and Rn all 0%.
  • the areas of L1 and R1 are all the same, and the areas of Ln and Rn are all the same, and the same amount of light can be emitted to each observer when observing at the same left and right angles with respect to the front of the display device. it can.
  • the display device can display an image having the same luminance (quality) to both the right observer and the left observer.
  • the first image display unit and the second image display unit each have a line-symmetric or point-symmetric shape.
  • the first image display unit and the second image display unit have a line-symmetric or point-symmetric shape, respectively.
  • the areas of LI and Rl can be the same.
  • the display device can display an image having the same luminance (quality) for both the right observer and the left observer.
  • a light shielding portion for shielding light is further provided in the region where the first image display portion and the second image display portion are formed.
  • the light shielding portion that shields light is provided in the region where the first image display portion and the second image display portion are formed due to the configuration of the display device. Even in such a case, since the first image display unit and the second image display unit satisfy the above formula (1), the display device is able to serve both the right observer and the left observer. It is possible to display an image with the same brightness (quality).
  • the display device can display an image having the same luminance (quality) for both the right observer and the left observer.
  • the display device of the present invention can display a double image satisfactorily.
  • the display device is widely used in image display devices such as televisions and monitors, and in image display devices provided in car navigation systems. Can be applied. Therefore, the present invention can be suitably used not only in the industrial field for manufacturing display devices but also in the industrial field for manufacturing various electronic devices and parts thereof.

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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

La présente invention concerne une unité d’affichage comprenant une ouverture (16) pour afficher une image en produisant vers l’extérieur une quantité de lumière en fonction d’un signal d’entrée et une barrière de parallaxe pour séparer cette image en différents angles de vue. La barrière de parallaxe consiste en une pluralité de barrières oblongues (3a). L’ouverture (16) est divisée en 2n parties (n : un entier au moins égal à deux) de zones parallèles au sens longitudinal α d’une barrière (3a) de sorte que, lorsque l’aire de chaque zone est L1 ··· Ln, Rn ··· R1 en ordre séquentiel à partir de la zone la plus à gauche, l’aire de chaque zone satisfait à la relation de l’expression (1) (m : un entier de 1 à n). Une unité affichant des images doubles peut ainsi offrir une image de qualité d’affichage équivalente aux observateurs tant à gauche qu’à droite.
PCT/JP2006/302959 2005-03-24 2006-02-20 Unite d’affichage Ceased WO2006100856A1 (fr)

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JP2005087247 2005-03-24
JP2005-087247 2005-03-24

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WO2006100856A1 true WO2006100856A1 (fr) 2006-09-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008242055A (ja) * 2007-03-27 2008-10-09 Seiko Epson Corp 画像表示装置
JP2009098537A (ja) * 2007-10-19 2009-05-07 Fujitsu Ltd 表示装置
JP2010066642A (ja) * 2008-09-12 2010-03-25 Epson Imaging Devices Corp 液晶表示装置
WO2010119592A1 (fr) * 2009-04-15 2010-10-21 シャープ株式会社 Appareil d'affichage à cristaux liquides

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0922006A (ja) * 1995-07-04 1997-01-21 Sharp Corp 空間光変調器、自動立体ディスプレイおよびバックライト、ならびに空間光変調器の製造方法
JPH10115801A (ja) * 1996-09-27 1998-05-06 Sharp Corp 観察者追従型方向性ディスプレイ、および観察者追従型照明システム
JPH10246869A (ja) * 1996-12-07 1998-09-14 Sharp Corp 方向性ディスプレイおよび方向性ディスプレイ用のマスクを製造する方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0922006A (ja) * 1995-07-04 1997-01-21 Sharp Corp 空間光変調器、自動立体ディスプレイおよびバックライト、ならびに空間光変調器の製造方法
JPH10115801A (ja) * 1996-09-27 1998-05-06 Sharp Corp 観察者追従型方向性ディスプレイ、および観察者追従型照明システム
JPH10246869A (ja) * 1996-12-07 1998-09-14 Sharp Corp 方向性ディスプレイおよび方向性ディスプレイ用のマスクを製造する方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008242055A (ja) * 2007-03-27 2008-10-09 Seiko Epson Corp 画像表示装置
JP2009098537A (ja) * 2007-10-19 2009-05-07 Fujitsu Ltd 表示装置
JP2010066642A (ja) * 2008-09-12 2010-03-25 Epson Imaging Devices Corp 液晶表示装置
WO2010119592A1 (fr) * 2009-04-15 2010-10-21 シャープ株式会社 Appareil d'affichage à cristaux liquides

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