WO2015002464A1 - 전자기 유도 방식의 위치감지와 정전용량 방식의 위치감지를 수행할 수 있는 타블렛 - Google Patents
전자기 유도 방식의 위치감지와 정전용량 방식의 위치감지를 수행할 수 있는 타블렛 Download PDFInfo
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- WO2015002464A1 WO2015002464A1 PCT/KR2014/005915 KR2014005915W WO2015002464A1 WO 2015002464 A1 WO2015002464 A1 WO 2015002464A1 KR 2014005915 W KR2014005915 W KR 2014005915W WO 2015002464 A1 WO2015002464 A1 WO 2015002464A1
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- conductive patterns
- antenna
- sensing
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- switch elements
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
- G06F1/169—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 the I/O peripheral being an integrated pointing device, e.g. trackball in the palm rest area, mini-joystick integrated between keyboard keys, touch pads or touch stripes
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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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of two-dimensional [2D] relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
-
- 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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
-
- 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
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
-
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive 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
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04106—Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
Definitions
- the present invention relates to a tablet capable of performing the position sensing of the electromagnetic induction method and the position sensing of the capacitive method, and more specifically, to emit from the electronic pen using the same antenna patterns without having a separate antenna pattern
- the present invention relates to a tablet capable of simultaneously detecting changes in capacitance caused by electromagnetic waves and human fingers.
- Patent Document 1 Korean Patent Registration No. 10-910348
- FIG. 1 is a view for explaining an outline of a technique disclosed in Patent Document 1.
- a tablet includes a loop antenna 10 constituting a closed loop, and a plurality of comb-shaped combs having one end electrically connected to the loop antenna 10 and arranged side by side in a manner crossing the loop antenna 10.
- Line antenna 20, and a multiplexer 30 for connecting the other ends of the line antenna 20, which are not connected to the loop antenna 10, to one of the plurality of input sides and selecting one of the plurality of input sides;
- the input of is connected to the loop antenna 10 and the other input is connected to the output side of the multiplexer 30 to determine the difference between the potential of the loop antenna 10 and the potential at the line antenna 20 selected by the multiplexer 30.
- a differential amplifier 40 for outputting.
- a technique as illustrated in FIG. 2 is disclosed in such a manner as to implement a touch panel for sensing a touch by a human finger and a position of a touch.
- a plurality of line antennas arranged in a lattice of X and Y axes are configured.
- the X-axis line antenna 21 and the Y-axis line antenna 22 may be insulated or disposed on different surfaces of the substrate so as not to be electrically connected to each other.
- An X-axis analog switch 37 is disposed at one end of the X-axis line antennas 21 so as to be selectively connected to the TX circuit 51.
- the other ends of the X-axis line antennas 21 are open.
- the Y-axis line antennas 22 connect one end to the RX circuit 52 through the Y-axis analog switch 38.
- the other end of the Y-axis line antennas 22 is open.
- a drive signal having an arbitrary voltage (or current) and waveform in the TX circuit 51 is connected to any one of the X-axis line antennas, and in this state, one Y by the Y-axis analog switch 38.
- the axial line antenna is selected and the signal (voltage or current caused by the drive signal) detected by the RX circuit 52 is measured.
- a drive signal is connected to another X-axis line antenna, and in this state, the Y-axis line antennas are selected one by one, and a scan operation of sensing signals from the selected Y-axis line antennas through the RX circuit 52 is performed. do.
- the X-axis line antenna and the Y-axis line antenna passing through the point where the finger touches or approaches can be found.
- the X-axis line antenna and the Y-axis line antenna found in this way it is possible to obtain the coordinates touched by the finger.
- the tablet device or the touch panel as described above may be disposed on the front of the display means, in this case, it is preferable that the antenna pattern formed in the sensing area is designed to be as transparent as possible.
- an object of the present invention is to provide a tablet that can selectively recognize the operation of the electronic pen and the touch of the finger by the same antenna pattern.
- the present invention improves the shape of the antenna pattern formed on the edge portion of the sensing area to adjust the arrangement of circuit elements for driving the antenna pattern, thereby minimizing the width of the bezel area, which is the outer edge of the sensing area. It is aimed at maximizing the size of the display means relatively without increasing the size of the tablet device.
- a first loop antenna having a loop antenna surrounding the first antenna, a plurality of first conductive patterns disposed in the sensing region, and a plurality of second conductive patterns crossing each other with the plurality of first conductive patterns in the sensing region.
- Line antennas having a plurality of second line antennas, switch elements controlling one end and the other end of each of the plurality of first conductive patterns, and switch elements controlling one end and the other end of each of the plurality of second conductive patterns. And controlling the switch elements to connect both ends of each of the plurality of first conductive patterns and the plurality of second conductive patterns. Controlled by a control circuit for performing position detection by the electromagnetic induction method or an electrostatic capacitance method.
- control circuit controls the switch elements connected to one end and the other end of each of the plurality of first conductive patterns so that the other end of each of the plurality of first conductive patterns is controlled. Opening or feedback connecting to one end of the plurality of second conductive patterns by controlling the switch elements connected to one end and the other end of each of the plurality of second conductive patterns.
- the apparatus may further include a transmitting circuit for transmitting a driving signal having an arbitrary waveform, and a receiving circuit for receiving a sensing signal transitioned by the driving signal of the transmitting circuit.
- the control circuit controls the switch elements connected to one end and the other end of each of the first conductive patterns so that a driving signal of the transmission circuit is supplied to one end of at least one of the plurality of first conductive patterns. And controlling the switch elements connected to one end and the other end of each of the second conductive patterns so that a receiving circuit can receive a sensing signal transferred to the second conductive patterns by a driving signal of the transmitting circuit. .
- the control circuit may control the switch elements connected to one end and the other end of each of the plurality of first conductive patterns to detect the other end of the plurality of first conductive patterns when the position sensing is performed by an electromagnetic induction method. And connecting the other end of the plurality of second conductive patterns to the loop antenna by controlling the switch elements connected to one end and the other end of each of the plurality of second conductive patterns.
- the control circuit may further include a differential amplifier for outputting an electric potential induced signal induced by the electronic pen to the first line antennas and the second line antennas and a potential difference between the loop antenna and the control circuit.
- a differential amplifier for outputting an electric potential induced signal induced by the electronic pen to the first line antennas and the second line antennas and a potential difference between the loop antenna and the control circuit.
- the position sensing in the electromagnetic induction method characterized in that it further comprises a selector for connecting the loop antenna to ground or common potential or open the closed loop of the loop antenna.
- the substrate on which the plurality of first conductive patterns and the plurality of second conductive patterns are formed and the control circuit including the switch elements are formed on different substrates.
- the plurality of first conductive patterns and the plurality of second conductive patterns may be insulated from one side of one substrate, or may be formed on one side and the other side of one substrate, or different from each other. It is characterized in that formed on the substrate.
- the loop antenna may be formed on one of the first and second substrates or a separate third substrate.
- the power coil for radiating the electromagnetic force with respect to the electronic pen is characterized in that formed on any one of the first to third substrate or a separate fourth substrate.
- the power coil is characterized by consisting of a plurality of coil patterns arranged by dividing a predetermined section in the horizontal direction or vertical direction or horizontal and vertical direction.
- the present invention can implement a tablet that can selectively recognize the operation of the electronic pen and the touch of the finger by the same antenna pattern.
- the present invention can perform a plurality of functions with one antenna pattern, the antenna pattern does not have to be formed in multiple layers, thereby improving transparency of the antenna pattern.
- the present invention improves the shape of the antenna pattern formed on the edge of the sensing area to adjust the arrangement of circuit elements for driving the antenna pattern, thereby minimizing the width of the bezel area, which is the outer edge of the sensing area. This allows to maximize the size of the display within the limited device size without increasing the size of the tablet device.
- 1 is a view for explaining the electronic pen detection circuit according to the prior art.
- FIG. 2 is a view for explaining a finger touch detection circuit according to the prior art.
- FIG 3 is a view for explaining the structure of a tablet that can detect the electronic pen and the finger in the same antenna pattern according to an embodiment of the present invention.
- FIG. 4 is a diagram illustrating an antenna pattern according to another embodiment of the present invention, and illustrates a structure in which a TX circuit is configured to simultaneously apply driving signals to both ends of a line antenna.
- FIG. 5 to 9 illustrate a transparent substrate having an X-axis line antenna and / or a transparent substrate having a Y-axis line antenna, and a pattern form of the X-axis line antenna and a Y-axis line antenna according to various embodiments of the present disclosure. Figure showing the pattern form of the.
- 10 to 12 are diagrams showing how the circuit elements are connected to the connector part when the tablet according to the present invention is operated in the electronic pen sensing mode and the touch sensing mode.
- FIG. 13 is a diagram illustrating the shape of line antennas when the antenna pattern for detecting the electronic pen shown in FIG. 1 and the double routing antenna pattern shown in FIG. 5 are combined.
- FIG. 3 is a diagram briefly illustrating a configuration principle of a tablet according to the present invention capable of measuring both positions of an electronic pen and a finger using line antenna patterns crossing each other in a sensing area.
- the principle of detecting the position of the electronic pen uses the principle shown in FIG. 1
- the principle of detecting the touch position of the finger uses the principle shown in FIG. 2.
- the loop antenna 10 is configured in the form of a closed loop to surround the sensing area A.
- the loop antenna 10 may be a common potential or a ground potential.
- the X-axis line antenna 21 or the first line antenna
- the Y-axis line antenna 22 or, 2 line antennas
- One end of the X-axis line antenna 21 is connected to one side of the first analog switch 31.
- the first analog switch 31 may select one side at a time or all of one side at the same time and connect it to the other side.
- the other side of the first analog switch 31 may be connected to a TX circuit 51 capable of outputting a driving signal for capacitive sensing by a finger.
- the TX circuit 51 is disposed between the other side of the first analog switch 31 and the control circuit 51 and is configured to alternatively operate with the differential amplifier 61.
- the first analog switch 31 has four one side and two other sides, the other side can select the connection between the TX circuit 51 and the differential amplifier 61, but such a structure is separate. It can be implemented in various ways, such as by adding a switch.
- the other end of the X-axis line antenna 21 may be connected to each input side of the second analog switch 32, the second analog switch 32 to connect all the input side to the output side at the same time or to disconnect the connection at the same time. Can be operated. Of course, an operation of selecting and connecting any one or a plurality of input sides to an output side may also be implemented.
- the differential amplifier 61 is a configuration used to sense the position of the electronic pen using the electromagnetic induction phenomenon in the sensing area, and has at least two input sides, one input side being the other side of the first analog switch 31 and It may be connected to the output side of the third analog switch 33 and the other input side may be connected to the loop antenna 10.
- Such a differential amplifier 61 has two input sides, that is, one end of any one X-axis line antenna selected by the first analog switch 31 or one Y-axis line antenna selected by the third analog switch 33. Outputs a potential difference between one end and the loop antenna 10.
- the output side of the differential amplifier 61 is connected to the control circuit 70.
- each line antenna is selected at a time when the first analog switch 31 and the third analog switch 33 do not overlap each other, so that any one of the X-axis line antennas is input to the input of the differential amplifier 61. Only one of the Y-axis line antenna is implemented to be connected.
- the TX circuit 51 is implemented to output a drive signal having an arbitrary voltage / current and waveform under the control of the control circuit.
- TX circuit 51 is implemented to alternatively operate with differential amplifier 61.
- the RX circuit 52 connects the potential of any one Y-axis line antenna selected by the third analog switch 33 to the control circuit 70 under the control of the control circuit 70.
- the driving signal applied to the X-axis line antenna crossing the intersection point is caused by the capacitance of the finger approaching the intersection point.
- the drive signal transitioned to the Y-axis line antenna crossing the intersection point and transferred by the third analog switch 33 is displayed as a sense signal to the control circuit 70 through the RX circuit 52.
- the control circuit 70 may identify the finger touch point by sequentially scanning all the Y-axis line antennas one by one with respect to every one X-axis line antenna and inspecting the sensing signal.
- the second analog switch 32 and the fourth analog switch 34 are turned on so that one end of the X-axis line antenna and one end of the Y-axis line antenna are To be connected to the loop antenna 10.
- one line antenna is sequentially selected by the first analog switch 31 and the third analog switch 33, and the differential amplifier 61 is operated to sense an induced voltage by the approach of the electronic pen to generate an electronic signal. It will detect the pen position.
- both the second analog switch 32 and the fourth analog switch 34 are turned off, and both one end of the X-axis line antenna and one end of the Y-axis line antenna are turned off.
- the differential amplifier 61 is disconnected from the first analog switch 31 and the third analog switch 33.
- the first analog switch 31 selects one X-axis line antenna and applies a driving signal applied through the TX circuit 51 to the selected X-axis line antenna.
- the third analog switch 33 selects one Y-axis line antenna, and the control circuit 70 checks the sensing signal at each selected Y-axis line antenna.
- the touch position may be determined by examining the magnitude of the detection signal.
- the pattern of the line antennas may be configured by printing a transparent conductive material on the transparent substrate, It is simple and inexpensive.
- the X-axis line antenna 21 is formed by printing a single layer on the transparent substrate 21B
- the Y-axis line antenna 22 is formed by printing a single layer on the transparent substrate 22B, and the substrates 21B, By only overlapping 22B), it is possible to form a sensing area A where the X-axis line antenna and the Y-axis line antenna cross each other in an insulated state.
- the sensing region A can be implemented with only two transparent substrates on which the transparent electrode is printed, the sensing region A can be improved in transparency.
- each analog switch is arranged in the outer edge portion of the detection area (A), and also, a plurality of antenna patterns are densely packed so that the pattern of each antenna is connected to the analog switch Since they must be placed, the edges must be thick.
- the sensing area corresponds to the display area of the display means
- the edge width of the sensing area corresponds to the bezel area of the display means.
- the width of the bezel area of the display means cannot be widened to match the size of the edge width of the tablet, it is necessary to minimize the outer edge width of the sensing area A in the tablet.
- the size of the sensing area A is improved by improving the shape of the loop antenna 10, the shape of each line antenna 21, 22, and the arrangement position of each circuit element including the analog switches 31 to 34. Maximize and minimize the size (width) of the bezel area.
- FIG. 4 is a diagram illustrating an antenna pattern according to another embodiment of the present invention, and illustrates a structure in which a TX circuit is configured to simultaneously apply driving signals to both ends of a line antenna.
- the 1st-4th analog switches 31-34 are arrange
- region A which consists of a substantially rectangular shape, and the X-axis line antenna 21 and Y-axis
- the configuration of the line antenna 22 extends in a form flowing along the edge region and is connected to each analog switch.
- the first to fourth analog switches 31 to 34 may be arranged side by side as shown in FIG. 4, but may be disposed at different positions.
- the analog switches are adjacent to each other so that a connector is formed on one side of the sensing area and all line antennas (which may further include a part of a loop antenna and a power coil) can be drawn through the connector.
- all line antennas which may further include a part of a loop antenna and a power coil
- the analog switches 31 to 34 By arranging the analog switches 31 to 34 adjacent to each other in this way, when the pattern of the line antennas 21 and 22 is configured to flow in one side toward each analog switch 31 to 34, it is transparent.
- the substrate only needs to form an antenna pattern, and various circuit elements can be separately configured on another substrate (for example, a PCB).
- a connector portion (indicated by reference numeral 'C') for electrical connection of each pattern may be configured on one side of the transparent substrate, and an electrode corresponding to the connector portion may be formed on the PCB (FIG. 5).
- the transparent substrate on which the antenna pattern is formed and the PCB on which various circuit elements are arranged may be formed by using the “connector portion” indicated by a dotted line in FIG. 4 as a boundary.
- a method of printing a conductive material may be applied to the transparent substrate in order to form a pattern of a conductive material (for example, ITO) that becomes a line antenna and a loop antenna.
- a conductive material for example, ITO
- the printing method only one layer of pattern can be formed on one substrate surface. Therefore, the X-axis line antenna 21 and the Y-axis line antenna 22, which must be insulated from each other, cannot be printed on the same side at the same time.
- the X-axis line antenna 21 and the Y-axis line antenna 22 are printed on both sides of one transparent substrate, or the first transparent substrate on which only the pattern of the X-axis line antenna 21 is printed. Only the pattern of the 21B and the Y-axis line antenna 22 can be formed in such a manner as to overlap the printed second transparent substrate 22B with each other (see Fig. 9).
- the loop antenna 10 is configured such that a part of the closed loop can be selectively opened or closed.
- a selector 15 having at least two inputs is prepared, one side of the closed loop of the loop antenna 10 is cut off, and both ends formed are connected to the input of the selector 15.
- the selector 15 connects both ends of the loop antenna 10 to each other (closed loop is completed) under the control of the control circuit 70, or keeps it cut (open loop closed).
- the loop antenna 10 is preferably maintained at a common potential or connected to ground.
- one side of the loop antenna 10 may be connected to a common potential or ground.
- the selector 15 has three inputs, and is implemented in such a manner as to connect the ground (or common potential) to the third input.
- the control circuit 70 may be configured to connect all three inputs (the loop antenna forms a closed loop and to the ground at the same time) or to open all three inputs (loop antenna). Closed loop is opened and at the same time the loop antenna is disconnected from ground).
- the selector 15 configured in this manner operates to connect all input sides in the electronic pen sensing mode, and operates to open all input sides in the touch sensing mode.
- the reason why the selector 15 is added is that, when the loop antenna 10 constituting the closed loop in the electronic pen sensing mode maintains the closed loop in the touch sensing mode, the human finger is detected by the closed loop structure. This is because the capacitance may not be sensed well enough at the line antennas 21, 22 when touching.
- the pattern of the loop antenna 10 may be formed by being printed together on either the transparent substrate 21B on which the X-axis line antenna 21 is printed or the circuit board 22B on which the Y-axis line antenna 22 is printed. It may be formed on a separate transparent substrate 10B. In addition, when the loop antenna 10 is disposed outside the sensing area A, the loop antenna 10 may be configured on an opaque substrate.
- TX circuit 51 is configured to be connected to both ends of the X-axis line antennas at the same time.
- the second analog switch 32 is controlled to select the other end of the line antenna selected by the first analog switch. In the state where the same line antenna is selected, when the driving signal is applied by the TX circuit 51, the driving signal is simultaneously applied to the first analog switch 31 and the second analog switch 31.
- the driving signal is different in size at each part of the line antenna in the sensing area.
- the conductive material forming the pattern of the line antenna may be, for example, ITO, which has a high resistivity, and when the conductive pattern is applied to a large sensing area, a driving signal applied at one end may be applied. At the other end, it may appear attenuated to a small magnitude by the electrical resistance of the conductive material. When the driving signal is attenuated in this way, it is difficult to accurately detect the touch of the finger.
- the driving signal will be sufficiently large in all parts of the sensing area even when the sensing area is large (that is, when the line antenna is long).
- FIG. 5 is a view showing a transparent substrate on which a pattern of an X-axis line antenna extending in the X-axis direction is formed.
- the X-axis line antenna 21 is configured such that one side end and the other end flow along the left and right sides of the sensing area A, respectively.
- the pattern of the X-axis line antenna 21 is formed to flow out through the connector portion 21C provided on one side (for example, the upper side) of the transparent substrate 21B.
- the connector portion 21C is a portion provided for connecting the antenna pattern to a corresponding contact of another circuit board (that may be a separate circuit board on which analog switches and / or other circuit components are mounted).
- FIG. 6 is a pattern of the Y-axis line antenna 22 extending in the vertical direction, and the line antennas are arranged side by side in the vertical direction in the inner part corresponding to the sensing area A, but flow in the edge part as closely as possible. It was configured to be drawn outward through the connector portion 22C of the upper side.
- the left half Y-axis line antenna 22 flows toward the connector part 22C along the left edge of the transparent substrate 22B, and the right half Y-axis line antenna 22 ) Is configured to flow toward the connector portion 22C along the right edge of the transparent substrate 22B.
- FIG. 7 is a diagram illustrating the shape of line antennas shown when the transparent substrate 21B on which the X-axis line antenna is printed and the transparent substrate 22B on which the Y-axis line antenna 22 is superimposed.
- the pattern of the X-axis line antenna 21 and the pattern of the Y-axis line antenna 22 are seen to cross or overlap each other, and the pattern of each line antenna is printed on individual transparent substrates 21B and 22B. Since each board is superimposed, each line antenna is actually insulated.
- the 8A and 8B illustrate another substrate on which a loop antenna is disposed.
- the loop antenna 10 may be formed simultaneously with the pattern of the power coil 12.
- the power coil 12 is a structure for radiating an electromagnetic force with respect to the electronic pen which has a resonant circuit, The operation can be understood with reference to patent document 1 mentioned above.
- a power coil 12 is provided for the purpose of providing an electromagnetic force to a non-powered electronic pen having a resonance circuit.
- the electronic pen itself has a battery or the like and receives energy from the built-in battery to emit electromagnetic waves through the resonant circuit, the configuration of the power coil may be omitted.
- the loop antenna 10 is flowing through the connector 10C in an open state without forming a complete closed loop in the substrate 10B.
- the loop antenna 10 may complete the closed loop through the selector 15 mounted on another circuit board.
- FIG. 8A shows an example in which the pattern of the loop antenna 10 and the single power coil 12 are simultaneously arranged on the substrate 10B.
- the tablet is large, supplying energy to the electronic pen with only a single power coil 12 lowers the energy supply efficiency, which causes malfunction.
- FIG. 8B illustrates an example in which a pattern of a loop antenna 10 and a plurality of power coils 12 'are simultaneously arranged on the substrate 10B.
- the operation of the plurality of power coils 12 in the electronic pen may operate only the corresponding power coil in which the electronic pen is located according to the position of the electronic pen.
- the plurality of power coils 12 ′ may be arranged by dividing the sections in the horizontal direction, and may be arranged by dividing the sections in the vertical direction.
- the plurality of power coils 12 ′ may be divided into sections in the horizontal direction and the vertical direction, respectively.
- FIG. 9 is a transparent substrate 21B on which the pattern of the X-axis line antenna 21 is formed as shown in FIG. 5, and a transparent substrate on which the pattern of the Y-axis line antenna 22 is formed as shown in FIG. 6. 22B) and the substrate 10B having the pattern of the loop antenna 10 formed thereon as shown in FIGS. 8A and 8B separately, and then the sensing region A can be realized by overlapping the substrates with each other.
- 10 to 12 illustrate the control performed on the line antenna and the loop antenna when the tablet according to the present invention is operated in the electronic pen sensing mode and the touch sensing mode, and includes connector portions 21C, 22C, and 10C. The following explains how each circuit element is connected.
- FIG. 10 is a state in which the transparent substrates 21B and 22B on which the X-axis and Y-axis line antennas 21 and 22 are printed, and the substrate 10B on which the loop antenna 10 and the power coil 12 are formed, are superimposed.
- a portion where the connector portions 21C, 22C and the connector portion 10C of the board 10B overlap with each other is regarded as one connector portion C and will be described.
- FIG. 11 is a diagram for explaining a connection relationship between antenna patterns for acquiring XY coordinates of the electronic pen when the tablet is operated in the electronic pen sensing mode.
- both ends of the X-axis line antenna 21 and the Y-axis line antenna 22 should be connected to the loop antenna 10.
- the second analog switch 32 and the fourth analog switch 34 have all input sides connected to the output side.
- the second analog switch 32 and / or the fourth analog switch 34 may include the X-axis line antenna 21 and the third analog selected by the first analog switch 31.
- the switch 33 may be configured to connect only the selected Y-axis line antenna 22 to the loop antenna one by one. In this way, if the first analog switch 31 selects one X-axis line antenna 21 and the third analog switch 33 selects any one Y-axis line antenna 22, at least the selected line antenna Are connected to the loop antenna 10.
- the loop antenna 10 is connected to the ground by the selector 15.
- a voltage pulse having a specific frequency may be applied to the power coil 12 for the purpose of supplying electromagnetic waves having an arbitrary frequency to the electronic pen.
- the output sides of the first analog switch 31 and the third analog switch 33 are respectively connected to the differential amplifier 61.
- the differential amplifier 61 is connected to the control circuit to be utilized for position detection of the electronic pen.
- FIG. 12 is a diagram for explaining a connection relationship between antenna patterns when the tablet is operated in a touch sensing mode.
- a drive signal is applied to both ends of the X-axis line antenna simultaneously by using the TX circuit 51.
- One end of the Y-axis line antenna is turned off from the loop antenna by turning off the fourth analog switch 34.
- the third analog switch 33 is selected one by one and connected to the RX circuit 52 so that the control circuit 70 senses the position of the finger touch.
- the power coil 12 does not operate. It is also desirable to open the loop antenna by turning off the selector 15.
- FIG. 13 is a diagram illustrating the shape of line antennas when the antenna pattern for detecting the electronic pen shown in FIG. 1 and the double routing antenna pattern shown in FIG. 5 are combined.
- One of the X-axis line antenna and the Y-axis line antenna is composed of an antenna pattern for detecting the electronic pen shown in FIG. That is, the loop antenna 10 constituting the closed loop, and the X-axis line antenna 21 composed of a plurality of comb-like line antenna patterns electrically connected to the loop antenna 10 and arranged in parallel with each other. .
- one of the X-axis line antenna and the Y-axis line antenna is composed of a double routing antenna pattern shown in FIG. That is, the Y-axis line antenna 21 is configured such that the double routing antenna pattern is formed close to the loop shape in the sensing area A, and one end and the other end thereof are located at one side.
- the existing antenna pattern related to the electronic pen detection is measured using the principle shown in FIG. Therefore, when the antenna pattern for detecting the electronic pen shown in FIG. 1 is implemented in the X-axis line antenna 21, a second analog switch connecting the other end of the X-axis line antenna 21 to the loop antenna 10 ( 32, there is no case, and if the Y axis line antenna 22 is implemented, there is no fourth analog switch 34 connecting the other end of the Y axis line antenna 21 to the loop antenna 10. Therefore, the operation in the case of combining the antenna pattern for sensing the electronic pen shown in FIG. 1 of FIG. 13 and the double routing antenna pattern shown in FIG. 5 will be fully understood through the description of FIGS. 3 and 4.
- Such a configuration of FIG. 13 may include two antenna layers by removing the substrate 10B on which the pattern of the loop antenna 10 shown in FIG. 9 is formed when a battery is provided in the electronic pen so that a power coil is not required. Can be.
- the antenna structure of the tablet according to the present invention as described above, it is possible to form the X-axis line antenna and the Y-axis line antenna, respectively, by the conductive pattern printed by the printing method.
- the sensing region can be realized by only two transparent circuit boards.
- the pattern of the X-axis line antenna and the pattern of the Y-axis line antenna can be formed on both surfaces of one transparent circuit board, respectively. Therefore, the number of circuit boards is small and the number of antennas crossing or overlapping each other is small, thereby improving the transparency of the sensing area.
- the pattern of the line antenna is refracted at the outer edge portion of the sensing region so as to flow toward the analog switch disposed at an arbitrary position, thereby reducing the width of the edge region as much as possible. do.
- the circuit elements can be arranged at any position, the degree of freedom in circuit design is increased.
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Abstract
Description
Claims (11)
- 전자기 유도 방식의 위치 감지와 정전용량 방식의 위치 감지를 수행할 수 있는 타블렛으로서,전자펜에서 방출하는 전자기파를 감지할 수 있는 소정의 감지영역의 적어도 일부분을 둘러싸는 루프 안테나와,상기 감지영역에 배치되는 복수의 제1 전도성 패턴들을 갖는 제1 라인 안테나들과,상기 감지영역에서 상기 복수의 제1 전도성 패턴들과 서로 교차하는 복수의 제2 전도성 패턴들을 갖는 제2 라인 안테나들과,상기 복수의 제1 전도성 패턴들 각각의 일단 및 타단을 제어하는 스위치 소자들과, 상기 복수의 제2 전도성 패턴들 각각의 일단 및 타단을 제어하는 스위치 소자들을 포함하고, 상기 스위치 소자들을 제어하여 상기 복수의 제1 전도성 패턴들 및 상기 복수의 제2 전도성 패턴들 각각의 양단에 대한 연결을 제어함으로써 전자기 유도 방식 또는 정전용량 방식으로 위치 감지를 수행하는 제어 회로를 포함하는 것을 특징으로 하는 타블렛.
- 제1항에 있어서,정전용량 방식으로 위치 감지를 수행하는 경우, 상기 제어 회로는, 상기 복수의 제1 전도성 패턴들 각각의 일단과 타단에 연결된 상기 스위치 소자들을 제어하여 상기 복수의 제1 전도성 패턴들 각각의 타단을 개방하거나 일단에 궤환연결하고, 상기 복수의 제2 전도성 패턴들 각각의 일단과 타단에 연결된 상기 스위치 소자들을 제어하여 상기 복수의 제2 전도성 패턴들 각각의 타단을 개방하거나 일단에 궤환연결하는 것을 특징으로 하는 타블렛.
- 제1항 또는 제2항에 있어서,임의의 파형으로 이루어진 구동 신호를 송신하는 송신 회로와,상기 송신 회로의 구동 신호에 의해 전이된 감지 신호를 수신하는 수신 회로를 더 포함하고,정전용량 방식으로 위치 감지를 수행하는 경우, 상기 제어 회로는, 상기 복수의 제1 전도성 패턴들 중 적어도 하나의 패턴의 일단에 상기 송신 회로의 구동 신호가 공급되도록 상기 제1 전도성 패턴들 각각의 일단과 타단에 연결된 상기 스위치 소자들을 제어하고, 상기 수신 회로가 상기 송신 회로의 구동 신호에 의해 상기 제2 전도성 패턴들에 전이된 감지 신호를 수신할 수 있도록 상기 제2 전도성 패턴들 각각의 일단과 타단에 연결된 상기 스위치 소자들을 제어하는 것을 특징으로 하는 타블렛.
- 제1항에 있어서,상기 제어 회로는, 전자기 유도 방식으로 위치 감지를 수행하는 경우, 상기 복수의 제1 전도성 패턴들 각각의 일단과 타단에 연결된 상기 스위치 소자들을 제어하여 상기 복수의 제1 전도성 패턴들의 타단을 상기 루프 안테나에 연결하고, 상기 복수의 제2 전도성 패턴들 각각의 일단과 타단에 연결된 상기 스위치 소자들을 제어하여 상기 복수의 제2 전도성 패턴들의 타단을 상기 루프 안테나에 연결하는 것을 특징으로 하는 타블렛.
- 제1항 또는 제4항에 있어서,상기 전자펜에 의해 상기 제1 라인 안테나들 및 상기 제2 라인 안테나들에 전자기 유도된 유도 신호와 상기 루프 안테나와의 전위차를 출력하기 위한 차동 증폭기를 더 포함하고,상기 제어 회로는 전자기 유도 방식으로 위치 감지를 수행하는 경우, 상기 전자펜에 의해 상기 제1 라인 안테나 및 상기 제2 라인 안테나에 전자기 유도된 유도 신호가 상기 차동 증폭기에 제공되도록 상기 복수의 제1 전도성 패턴들 및 상기 복수의 제2 전도성 패턴들 각각의 일단과 타단에 연결된 상기 스위치 소자들을 제어하는 것을 특징으로 하는 타블렛.
- 제1항에 있어서,전자기 유도 방식으로 위치 감지를 수행하는 경우에, 상기 루프 안테나를 접지 또는 공통전위에 연결하거나 상기 루프 안테나의 폐루프를 개방시키기 위한 선택기를 더 포함하는 것을 특징으로 하는 타블렛.
- 제1항에 있어서,상기 복수의 제1 전도성 패턴들 및 상기 복수의 제2 전도성 패턴들이 형성된 기판과, 상기 스위치 소자들을 포함하는 상기 제어 회로는, 서로 다른 기판에 형성되는 것을 특징으로 하는 타블렛.
- 제1항에 있어서,상기 복수의 제1 전도성 패턴들 및 상기 복수의 제2 전도성 패턴들은 하나의 기판의 한쪽 면에 절연된 상태로 형성되거나, 하나의 기판의 한쪽 면과 다른쪽 면에 각각 형성되거나, 각각 다른 기판에 형성되는 것을 특징으로 하는 타블렛.
- 제1항에 있어서,상기 루프 안테나는 상기 제1 기판 및 상기 제2 기판 중 어느 하나의 기판 또는 별도의 제3 기판에 형성되는 것을 특징으로 하는 타블렛.
- 제9항에 있어서,상기 전자펜에 대해 전자기력을 방사하는 파워 코일이 상기 제1 내지 제3 기판 중 어느 하나의 기판 또는 별도의 제4 기판에 형성되는 것을 특징으로 하는 타블렛.
- 제10항에 있어서,상기 파워 코일은 가로 방향 또는 세로 방향 또는 가로 및 세로 방향으로 소정의 구간을 나누어 배치된 복수의 코일 패턴으로 이루어지는 것을 특징으로 하는 타블렛.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016523664A JP6186081B2 (ja) | 2013-07-03 | 2014-07-02 | 電磁気誘導方式の位置感知と静電容量方式の位置感知とを行うタブレット |
| EP14819717.1A EP3018564A4 (en) | 2013-07-03 | 2014-07-02 | TABLET CAPABLE OF DETECTING POSITION USING ELECTROMAGNETIC INDUCTION AND ELECTROSTATIC CAPACITY |
| CN201480038070.4A CN105359066B (zh) | 2013-07-03 | 2014-07-02 | 能够使用电磁感应和静电电容来感测位置的平板 |
| US14/902,590 US9772660B2 (en) | 2013-07-03 | 2014-07-02 | Tablet capable of sensing location using electromagnetic induction and electrostatic capacitance |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2013-0077691 | 2013-07-03 | ||
| KR20130077691A KR101487463B1 (ko) | 2013-07-03 | 2013-07-03 | 전자기 유도 방식의 위치감지와 정전용량 방식의 위치감지를 수행할 수 있는 타블렛 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015002464A1 true WO2015002464A1 (ko) | 2015-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2014/005915 Ceased WO2015002464A1 (ko) | 2013-07-03 | 2014-07-02 | 전자기 유도 방식의 위치감지와 정전용량 방식의 위치감지를 수행할 수 있는 타블렛 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9772660B2 (ko) |
| EP (1) | EP3018564A4 (ko) |
| JP (1) | JP6186081B2 (ko) |
| KR (1) | KR101487463B1 (ko) |
| CN (1) | CN105359066B (ko) |
| WO (1) | WO2015002464A1 (ko) |
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Also Published As
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|---|---|
| JP6186081B2 (ja) | 2017-08-23 |
| US20160179134A1 (en) | 2016-06-23 |
| EP3018564A4 (en) | 2016-08-03 |
| JP2016527621A (ja) | 2016-09-08 |
| KR20150004579A (ko) | 2015-01-13 |
| CN105359066A (zh) | 2016-02-24 |
| EP3018564A1 (en) | 2016-05-11 |
| KR101487463B1 (ko) | 2015-01-28 |
| US9772660B2 (en) | 2017-09-26 |
| CN105359066B (zh) | 2018-10-30 |
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