WO2015182035A1 - タッチセンサシステム用識別体およびタッチセンサシステム - Google Patents
タッチセンサシステム用識別体およびタッチセンサシステム Download PDFInfo
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- WO2015182035A1 WO2015182035A1 PCT/JP2015/002206 JP2015002206W WO2015182035A1 WO 2015182035 A1 WO2015182035 A1 WO 2015182035A1 JP 2015002206 W JP2015002206 W JP 2015002206W WO 2015182035 A1 WO2015182035 A1 WO 2015182035A1
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- sensor system
- touch sensor
- touch
- conductive pattern
- circuit
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
- G06F3/0442—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
- G06F3/039—Accessories therefor, e.g. mouse pads
- G06F3/0393—Accessories for touch pads or touch screens, e.g. mechanical guides added to touch screens for drawing straight lines, hard keys overlaying touch screens or touch pads
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
- G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
Definitions
- the present invention relates to a touch sensor system identifier for performing user authentication, and a touch sensor system in which identification is performed and a touch or multi-touch input operation is performed.
- Patent Document 1 discloses that user authentication of an electronic device is performed using identification information when print data is output from the printing apparatus by making a print request to the print data temporarily stored on the server. It is carried out.
- touch sensor technology has been developed rapidly as smartphones and tablet PCs are used as input devices for computing systems.
- the initial touch panel technology identifies an input position by one touch
- the current mainstream is a touch panel capable of detecting a plurality of simultaneous touch inputs (multi-touch input).
- a method for detecting a plurality of simultaneous touch inputs there is an electrostatic capacitance method that reads a change in charge of sensors arranged in a matrix.
- a signal may be detected in addition to the position where the user intentionally touches the screen. This is known as a ghost touch or ghost point (herein simply referred to as ghost).
- ghost A ghost that occurs in a touch sensor system that detects multi-touch is caused by the interference of the sensor through the indicator when the indicator, such as a human finger, is insufficiently grounded.
- Patent Document 2 A technique for correcting this ghost on the controller side of the touch sensor system is disclosed in Patent Document 2.
- Patent Document 3 A technique for discriminating between a ghost and a true touch at the sensor unit of the touch sensor system is disclosed in Patent Document 3.
- Patent Documents 2 and 3 assume touch of a human finger on the touch panel surface, and assume a case where interference such as a floating conductive material is strong or reading of a conductor pattern having a complicated shape. If the disclosed technique is used, the amount of correction calculation is very large, the touch sensor system is complicated and complicated, and the number of position detectable points is limited. .
- the present invention solves the above-mentioned conventional problem, and does not correct the ghost on the controller side of the touch sensor system or discriminate the ghost from the true touch at the sensor unit, but improves the ghost on the discriminator side. Then, it aims at providing the identification body for touch sensors which can detect the shape of the identification body seen from the touchscreen surface more correctly, and a touch sensor system using the same.
- An identification body for a touch sensor system includes a conductive pattern portion in which a conductive pattern having a shape for allowing the touch sensor system to recognize the touch sensor system in contact with or in proximity to the touch panel surface of the touch sensor system, A virtual grounding circuit unit having an energy loss unit that is connected to the conductive pattern unit and consumes energy with respect to the frequency of the drive signal used in the touch sensor system. Achieved.
- the energy loss part is formed of a series resonance circuit.
- an antenna circuit is used as the virtual grounding circuit section.
- the energy loss part is designed to be resonant at a frequency lower than the drive frequency.
- a coil circuit or a coil circuit including an eddy current loss part (a conductor around the coil) is used as the virtual grounding circuit part.
- the conductive pattern itself is a part or all of the virtual ground circuit portion.
- the conductive pattern itself is a part or all of the virtual grounding circuit portion, and the conductive pattern is formed of a coil.
- the identification body for a touch sensor system makes a virtual ground and touches an ungrounded indicator by touching or approaching the touch panel surface of the touch sensor system that enables position input operation of the indicator.
- the sensor system is made readable, whereby the above object is achieved.
- a conductive pattern portion in which a conductive pattern having a predetermined shape is arranged as the shape of the indicator facing the touch panel surface, and the conductive pattern
- a virtual grounding circuit unit having a function equivalent to that of a grounding circuit connected to the conductive pattern.
- a conductive pattern portion in which a conductive pattern having a predetermined shape is disposed as the shape of the indicator is provided opposite to the touch panel surface, and the conductive pattern
- the pattern itself is a virtual grounding circuit unit having a function equivalent to that of the ground circuit.
- the virtual grounding circuit unit in the touch sensor system identification body of the present invention is configured by at least one of a coil circuit and an antenna circuit.
- the touch sensor system according to the present invention includes the touch sensor system identification body according to the present invention mounted on the touch panel surface that enables a position input operation of an indicator, thereby providing conductivity of the touch sensor system identification body.
- the pattern shape can be read and identified, thereby achieving the above object.
- a conductive pattern portion in which a conductive pattern having a shape to be recognized by the touch sensor system is placed in contact with or in proximity to the touch panel surface of the touch sensor system, and the conductive pattern portion is connected to the conductive pattern portion.
- a virtual grounding circuit unit having an energy loss unit that consumes energy with respect to the frequency of the drive signal used in the touch sensor system.
- the energy loss part consumes energy with respect to the frequency of the drive signal used in the touch sensor system, so that even if the indicator is not grounded, the indicator is virtually grounded and is equivalent to the ground circuit. Because it has a function, it does not correct the ghost on the controller side of the touch sensor system or distinguish the ghost and true touch at the sensor part as in the past, but improves the ghost on the identification body side, It becomes possible to more accurately detect the shape of the identification body viewed from the touch panel surface.
- the energy loss unit consumes energy with respect to the frequency of the drive signal used in the touch sensor system, so that the indicator is virtually grounded even if the indicator is not grounded. Because it has the same function as the grounding circuit, it is not necessary to correct the ghost on the controller side of the touch sensor system or distinguish the ghost from the true touch at the sensor part as in the past. Improvement can be made on the body side, and the shape of the identification body viewed from the touch panel surface can be detected more accurately. Furthermore, the detected signal can be increased.
- FIG. 1 It is a block diagram which shows the structural example of the identification body for touch sensor systems in Embodiment 1 of this invention. It is a top view which shows the example of the electroconductive pattern in the electroconductive pattern part of FIG. It is a schematic diagram which shows the example of security authentication which has placed the identification body for touch sensor systems which mounted the virtual grounding circuit on the touch panel of the touch sensor system of FIG. It is a block diagram which shows the structural example of the virtual grounding circuit part of FIG. (A) is a schematic diagram which shows typically the example of a partial plane structure of the touch panel of the touch sensor system of FIG. 1, and (b) is a signal waveform diagram obtained from the touch panel.
- (A) is an equivalent circuit diagram of a capacitive touch sensor system of a self-capacitance type, and (b) is an equivalent circuit diagram for explaining the capacitance detection mechanism thereof.
- (A) is an equivalent circuit diagram of the capacitive touch sensor system of a mutual capacitance system
- (b) is an equivalent circuit diagram for demonstrating the capacity
- FIG. 12 is an equivalent circuit diagram when the virtual grounding circuit is a series resonance circuit in the contact object of FIG. 11.
- (A) is an equivalent circuit diagram when the contact capacitor and the series resonant circuit are resonated with the contact object of FIG. 11, and (b) is a diagram showing the equivalent circuit of (a) in terms of power factor.
- (A) is an equivalent circuit diagram in which the RL series circuit component of the contact is connected to both sides of the parasitic capacitance when operated at a driving frequency higher than the resonance frequency
- (b) is an equivalent circuit of (a). It is the figure shown with the power factor.
- (A) And (b) is a current waveform diagram for demonstrating the position detection mechanism by the signal inversion at the time of designing a virtual grounding circuit by an active element (element with a power supply).
- (A) And (b) is a current waveform diagram for demonstrating the position detection mechanism by a phase delay at the time of designing a virtual grounding circuit by an active element (element with a power supply). It is a top view which shows the example of a detection of the conductive pattern at the time of mounting the 20-mm diameter circular conductive pattern single-piece
- FIG. 4 is a capacitance signal distribution diagram of a circular conductor pattern, where (a) is a capacitance signal distribution diagram in a floating state, (b) is a capacitance signal distribution diagram in a ground state, and (c) is a capacitance signal distribution in a virtual ground by a monopole antenna.
- FIG. It is a block diagram which shows the structural example of the identification body for touch sensor systems in Embodiment 2 of this invention. It is a perspective view which shows typically the specific example of the identification body for touch sensor systems in Embodiment 2 of this invention. It is a perspective view which shows typically the other specific example of the identification body for touch sensor systems in Embodiment 2 of this invention.
- FIG. 29 is a block diagram illustrating a configuration example of a controller of the touch sensor system of FIG. 28.
- FIG. 1 is a block diagram illustrating a configuration example of an identification body for a touch sensor system according to Embodiment 1 of the present invention.
- a touch sensor system identifier 1 includes a conductive pattern portion 2 in which a conductive pattern having a predetermined shape is disposed facing a touch panel screen of the touch sensor system 4, and a conductive pattern. And a virtual grounding circuit unit 3 having a function equivalent to that of a grounding circuit mounted on a touch panel surface of a touch sensor system 4 that enables a position input operation of an indicator, and is used for user authentication or the like.
- the touch sensor system discriminator 1 is in contact with or close to the touch panel surface of the touch sensor system 4 that enables the position input operation of an indicator such as a finger, and is described below in a predetermined shape that is not grounded.
- the touch sensor system 4 can be read by setting the sex pattern 21 in the grounding state.
- the conductive pattern portion 2 is made of a conductive material to react (shape detection) with the touch sensor system 4 and has a cross shape (FIG. 2 (a)) as a planar view shape as viewed from the touch panel surface as the conductive pattern. It is formed in various shapes such as a circle (FIG. 2 (b)), a triangle (FIG. 2 (c)) and a quadrangle (square, rectangle, rhombus, trapezoid) although not shown.
- the shape of the conductive pattern 21 indicates code information such as ID information for user authentication.
- these various shapes include a combination of a plurality of figures (for example, a combination of a circle and a triangle corresponds to a predetermined character, a combination of a circle and a square corresponds to another character), and a number string Or a character string including a symbol string. Of course, it may be a character string that does not include a numeric string or symbol string.
- the touch sensor system identifier 1 used here is placed on the touch panel surface, the substrate of the touch sensor system identifier 1 is made transparent and conductive in order to improve the visibility of the display screen below it. It is preferable to use a transparent electrode such as a mesh pattern of material or ITO, but a solid electrode such as aluminum may be used for the conductive pattern.
- the shape of the conductive pattern of the conductive material may be processed so that the shape cannot be seen from the outside, such as by coating the surface of the conductive pattern with an opaque resin film. desirable.
- the virtual grounding circuit unit 3 if the drive signal applied to the plurality of drive lines of the touch sensor system 4 is an AC signal and energy is consumed by changing the frequency of the AC signal, current flows and charges. Therefore, it is configured to have the same function as the ground circuit for the conductive pattern.
- FIG. 3 is a schematic diagram illustrating a security authentication example in which the touch sensor system identification body 1 in which the virtual grounding circuit 3 is mounted on the touch panel 41 of the touch sensor system 4 of FIG. 1 is placed.
- the touch sensor system identifier 1 is mounted on the touch panel 41 of the touch sensor system 4 having the authentication system, and a predetermined area on the sensor screen of the touch panel 41 is touched with an indicator such as a finger. A state in which the information device is operated by operating a function corresponding to the touch area is shown.
- the information device reads the conductive pattern 21 of the touch sensor system identifier 1 on the touch panel 41, determines the user of the information device, and displays an appropriate operation screen on the screen of the touch panel 41. The user can use the information device by operating the operation screen with the touch panel 41.
- the conductive pattern 21 of the touch sensor system identifier 1 is preferably placed on the sensor screen of the touch panel 41 so that the shape seen from the sensor screen of the touch panel 41 can be read.
- the conductive pattern 21 may be disposed on a flat or three-dimensional bottom surface, may be disposed on the bottom surface of a cylinder (or prism) such as a seal, or may be disposed on a key-like member. However, it may be arranged on the bottom of a stuffed animal or doll. Moreover, a cylinder or a doll itself may be a conductor and its bottom shape may be read. ID information can be expressed using the difference in shape of the conductive pattern 21, and identification can be performed by a change in a signal read from a sensor on the touch panel surface.
- FIG. 4 is a block diagram illustrating a configuration example of the virtual grounding circuit unit 3 of FIG.
- the virtual grounding circuit unit 3 includes a conductive pattern connection unit 31 and a ground compensation circuit unit 32 to which the conductive pattern unit 2 is connected via the conductive pattern connection unit 31.
- the function of the ground compensation circuit unit 32 is realized so as to function in the same manner as when the pattern unit 2 is grounded.
- the conductive pattern connecting portion 31 is a portion that connects the conductive pattern portion 2 and the ground compensation circuit portion 32, and is preferably connected with a low impedance so as not to disturb the design of the ground compensation circuit portion 32. Further, when the ground compensation circuit unit 32 is formed of a conductive material, the conductive pattern connection unit 31 electrically connects the ground compensation circuit unit 32 so that the ground compensation circuit unit 32 does not react to the touch sensor system 4. You may have a role to shield.
- the ground compensation circuit unit 32 is a circuit intended to compensate for a change in electric charge with respect to the frequency of the drive signal used in the touch sensor system 4 and has a structure having energy loss with respect to the frequency of the drive signal.
- the structure can be realized with an antenna operating at the frequency of the drive signal.
- the conductive pattern connection unit 31 and the ground compensation circuit unit 32 which are the configuration of the virtual grounding circuit unit 3 may be integrated so as to have both functions.
- FIG. 5A is a schematic diagram schematically showing a partial planar configuration example of the touch panel 41 of the touch sensor system 4 of FIG. 1, and FIG. 5B is a signal waveform diagram obtained from the touch panel 41. is there.
- the capacitive touch sensor system 4 is called a drive signal in the drive lines 101, 102, 103, 104 arranged in parallel in the vertical direction on the touch panel 41.
- An AC signal is applied to detect a change in the current signal waveform of a plurality of parallel sense lines 111, 112, 113, 114 that intersects the drive lines 101, 102, 103, 104 at right angles, respectively.
- a change in the capacitance C at the place is detected.
- reference numeral 42 denotes a reference current signal waveform in a state where no pointing object is placed on the sensor surface of the touch panel 41, and the pointing object is placed on the sensor surface of the touch panel 41.
- the current signal waveform increases or decreases as the current signal waveform 43 increases with respect to the current signal waveform 42.
- the touch sensor system 4 reads that the current signal waveform increases or decreases. This amount of change is defined as a change in the capacitance C.
- the capacitance C at the intersection of the placed drive line and sense line increases or decreases.
- the drive lines 101, 102, 103, and 104 and the sense lines 111, 112, 113, and 114 may be inverted, and the line for applying the drive signal and the line for sensing may be alternately switched.
- Capacity detection mechanism by finger touch 6A is an equivalent circuit diagram of the self-capacitance type capacitive touch sensor system 4A, and FIG. 6B is an equivalent circuit diagram for explaining the capacitance detection mechanism.
- a drive voltage is applied to detect a current on the same line, and whether the detected current changes (change in capacitance C). I am reading the touch position.
- the capacitor C is grounded via the capacitors C1 and C2 in parallel at both ends.
- the pointing object 5 such as a finger is on the sensor surface as shown in FIG. 6B.
- the impedance viewed from the ammeter A is reduced compared to the state where no pointing object 5 is placed, so that the current increases compared to the state where no pointing object 5 is placed.
- the capacitance also increases.
- the direct current resistance and the inductance component are omitted.
- FIG. 7A is an equivalent circuit diagram of the mutual capacitance type capacitive touch sensor system 4B
- FIG. 7B is an equivalent circuit diagram for explaining the capacitance detection mechanism.
- the drive voltage is applied to the lower drive line, the current I is detected by the upper sense line, and the detected current I is The touch position is read based on whether or not there is a change (change in the capacitance C).
- change in the capacitance C when a human finger touches the sensor surface of the touch panel, it can be considered that the capacitor C is grounded via the capacitors C1 and C2 in parallel at both ends.
- the pointing object 5 such as a finger is placed on the sensor surface as shown in FIG. 7B.
- the capacitive touch sensor system 4B is grounded via the capacitors C1 and C2 in parallel at both ends of the capacitor C, the current I2 flowing through the ammeter A is larger than the state where the pointing object 5 is not placed.
- the current I1 decreases.
- the capacitance C also decreases. Thus, it is determined that the finger touch is made at the position where the capacitance C has decreased.
- FIG. 8 is an equivalent circuit diagram in a state where a floating conductor is placed at one intersection on the touch panel of the capacitive touch sensor system 4B of the mutual capacitance type, and FIG. 8A is applied to the drive line.
- FIG. 8B is an equivalent circuit diagram showing a case where the drive signal applied to the drive line is a high voltage.
- FIG. 9 is a schematic diagram showing a planar state in which a predetermined floating conductor 61 is placed on a partial area of the touch panel of the touch sensor system 4 of FIG.
- FIG. 9 the rectangular shape in plan view over the intersection of the drive line 101 and the sense line 111, the intersection of the drive line 102 and the sense line 112, and the plurality of intersections on the intersection of the drive line 102 and the sense line 113.
- the floating conductor 61 is disposed on the touch panel 41. In this case, a current path is generated with low impedance at the intersection of the drive line 101 and the sense line 111, the intersection of the drive line 102 and the sense line 112, and the intersection of the drive line 102 and the sense line 113.
- the signal affects not only the intersection (sensor) of the sense line 111 but also the intersection (sensor) of the sense lines 112 and 113, and an intersection area other than the area where the rectangular conductor floating conductor 61 is placed, for example, the drive line 101
- the current signal is sensed at each intersection region (sensor unit) between the first and second sense lines 112 and 113 as if the capacitance has changed. This generates a ghost.
- FIG. 10A is a schematic diagram showing a planar state in which a predetermined floating conductor 62 is placed on a partial area of the touch panel of the touch sensor system 4 of FIG. 1, and FIG. It is an equivalent circuit diagram when a predetermined floating conductor 62 is placed on the capacitive touch sensor system.
- two intersections P1 and P4 are targeted, on the intersection P1 between the drive line 101 and the sense line 111, and on the drive line 102 and the sense line.
- a floating conductor 62 having a rectangular shape in plan view is mounted on the touch panel 41 so as to overlap the two intersections P1 and P4 on the intersection P4 with the 113.
- the ghost generation principle in this case will be described.
- the voltage value V101 of the drive line 101 is the voltage value of the drive line 102.
- V102 is greater than V102 (V101 ⁇ V102> 0)
- the current value A111 of the sense line 111 decreases and the current value A113 of the sense line 113 increases.
- the capacitance C at the intersection P1 of the drive line 101 decreases and the capacitance C at the intersection P2 increases.
- the current decreases at the intersection P1 where the floating conductor 62 is placed, and the current increases at the other intersection P2 to generate a ghost.
- the position between the position X1 and the position X2 may be generated, and a change in increase or decrease beyond a predetermined value may be given from the reference current signal waveform 42 as shown in FIG.
- the reference current signal waveform 42 may be decreased by a predetermined value or more, for example, as a current signal waveform 43.
- FIG. 11 is an equivalent circuit diagram showing a state in which the contact object E1 is placed on the mutual capacitance type capacitive touch sensor system 4B.
- the contact object E1 is placed on one sensor unit (for example, an intersection P1).
- the parasitic capacitance Cs is the capacitance of one sensor unit between the drive line (drive line) and the sense line
- the contact capacitance C1 is the capacitance between the sense line and the contact object E1
- the contact capacitance C2 is the contact object E1 and the drive line (drive). Capacity).
- the resistance component Ra may be increased. As described above, the larger the resistance component Ra, the larger the energy loss and the grounding.
- the impedance ZE1 of the entire circuit due to the mounting of the contact E1 is high, a parallel parasitic capacitance Cs (parallel path) exists, and therefore the contact It becomes difficult for current to flow through E1, and energy loss at the contact object E1 is reduced.
- FIG. 12 is an equivalent circuit diagram when the virtual grounding circuit is a series resonance circuit in the contact object E1 of FIG.
- the series resonant circuit formed by the contact E1 is an equivalent circuit of an r component and L component series circuit and a virtual grounding circuit of contact capacitors C1 and C2 on both sides thereof. If the combined capacity of the contact capacities C1 and C2 due to the contact object E1 is C ′, and the r component and L component in series are expressed,
- the impedance z is maximized at the resonance frequency, and the current flowing through the circuit is minimized.
- FIG. 13A is an equivalent circuit diagram when the contact capacitors C1 and C2 and the series resonance circuit (r component and L component) are caused to resonate with the contact object E1 of FIG. 11, and FIG. It is the figure which showed the equivalent circuit of Fig.13 (a) by the power factor.
- the contact capacitors C1 and C2 and the series resonance circuit are formed by the contact object E1, but when the resonance design is performed at the drive frequency of the touch sensor system 4B.
- the contact capacitors C1 and C2 and the L component of the series resonant circuit disappear at the time of resonance, and the resistance component (r component) of the contact object E1 on both sides of the parasitic capacitance Cs of the drive line (drive line) and the sense line. Only equals what is connected.
- inductance component L component
- the resonance design of the contact product E1 performed at a frequency lower than the drive frequency. If the drive frequency is, for example, 500 KHz as the resonance frequency ⁇ 0 , it is set to 400 KHz, and ⁇ L is canceled by ⁇ C and set to 0. This is shown by the following equations (5) to (7).
- FIG. 14A is an equivalent circuit diagram in which the RL series circuit component of the contact E1 is connected to both sides of the parasitic capacitance Cs when operated at a drive frequency ⁇ 2 higher than the resonance frequency ⁇ 0 ,
- FIG. ) Is a diagram showing the equivalent circuit of FIG. 14A in terms of power factor.
- the combined impedance z of the contact object E1 becomes the following formula (5), and the power factor of the RL series circuit component becomes the following (6).
- the contact object E1 is placed across a plurality of sensor parts (intersections P1, P4) as shown in FIG. 10A, not only the capacitors C1 and C2 (one sensor part) in FIG.
- the resonance design may be performed including the contact capacitance.
- the virtual grounding circuit is formed by passive elements (elements having no power supply) has been described.
- the case where the virtual grounding circuit is designed by active elements (elements having a power supply) is described. Will be described.
- 15 (a) and 15 (b) are current waveform diagrams for explaining a position detection mechanism by signal inversion when the virtual grounding circuit is designed by an active element (an element having a power supply).
- the signal read from the sensor unit changes so that the level decreases from the reference current signal waveform T11 that is not in contact with the sensor unit to the detection signal T14.
- the changed signal amount becomes large, it is possible to detect a large capacitance signal. Therefore, position detection with a touch pen becomes easy.
- 16 (a) and 16 (b) are current waveform diagrams for explaining a position detection mechanism by phase delay when the virtual grounding circuit is designed with an active element (an element having a power supply).
- the signal read from the drive signal T10 by the virtual grounding circuit of the touch pen is If the design is made so that the phase delay signal T13 delayed in phase by half a wavelength in the virtual grounding circuit is output from the touch pen to the touch screen, no signal read from the sensor unit (intersection) is in contact with the sensor unit.
- the level changes from a non-reference current signal waveform T11 to a detection signal T12. In this case, since the changed signal amount becomes large, it is possible to detect a large capacitance signal.
- the above-described method of detecting the position by inverting the signal or delaying the phase with the active element can strongly detect the change in the capacitance signal.
- the drive signal of the touch panel system 4 is generated for each drive sense.
- the signals are different. Therefore, when the contact object E1 is large and is in contact across a plurality of sense lines, the phase of the signal waveform of each drive line (drive line) can be delayed by a half wavelength, or the signal waveform can be inverted. is necessary. In other words, it is necessary to design the signals so that the current signals at the points on the grid with the same interval as the touch panel system 4 are read on a plane and the signals are output at the points on the grid with the same interval as the touch panel system 4.
- the first embodiment proposes a method of increasing the change in the detected capacitance signal while suppressing interference called ghost itself.
- ghost itself a method of increasing the change in the detected capacitance signal while suppressing interference called ghost itself.
- FIG. 17 is a plan view showing a detection example of the conductive pattern 21 when a circular conductive pattern 21 having a diameter of 20 mm is placed on the touch panel 41 of the touch sensor system 4 of FIG.
- FIG. 17 shows a capacitance signal map obtained from the sensor in a state in which a circular conductive pattern 21 having a diameter of 20 mm is in contact with the touch panel 41 of the touch sensor system 4 without mounting the virtual grounding circuit unit 3. ing.
- a single circular conductive pattern 21 having a diameter of 20 mm is used for the conductive pattern portion 2.
- the grid spacing is 5 mm.
- a capacitive signal region 45 formed by a ghost pattern is detected in the vicinity thereof.
- FIG. 18 shows a detection example when the virtual grounding circuit unit 3 is connected to a single circular conductive pattern 21 having a diameter of 20 mm as an effect of the first embodiment.
- FIG. 18 is a plan view showing a detection example of the conductive pattern 21 when the circular conductive pattern 21 having a diameter of 20 mm and the virtual grounding circuit 3 are mounted on the touch panel 41 of the touch sensor system 4 of FIG.
- the virtual grounding circuit unit 3 is connected to and mounted on the conductive pattern 21, and the sensor is obtained with the circular conductive pattern 21 having a diameter of 20 mm being in contact with the touch panel 41 of the touch sensor system 4.
- the capacity signal map to be displayed is shown.
- FIG. 19A and 19B are capacitance signal distribution diagrams of the circular conductor pattern 21.
- FIG. 19A is a capacitance signal distribution diagram in a floating state
- FIG. 19B is a capacitance signal distribution diagram in a ground state
- FIG. ) Is a capacitance signal distribution diagram of virtual ground by a monopole antenna which is a series resonance circuit.
- the conductive pattern 21 in which the conductive pattern 21 having a shape for making the touch sensor system 4 recognize is brought into contact with or close to the surface of the touch panel 41 of the touch sensor system 4.
- the energy loss unit consumes energy with respect to the frequency of the drive signal used in the touch sensor system, so that the identification object 1 (indicator) is not grounded. Since it is virtual grounded and has the same function as the ground circuit, the ghost is corrected on the controller side of the touch sensor system 4 as in the past, or the ghost and the true touch are discriminated by the sensor unit. The ghost can be improved on the identification body 1 side, and the shape of the identification body 1 viewed from the touch panel 41 surface can be detected more accurately. For this reason, it becomes possible to apply the touch sensor system 4 as an identification tool such as user authentication, whereby it can be used for a security authentication system as shown in FIG. 3 or used for amusement. .
- the touch performance of the existing touch sensor system 4 is not affected. For this reason, it is useful that the finger shape or the touch pen and the identification body 1 can be used together to identify the region shape as well as the touch position.
- the touch sensor system identification body 1 that detects the shape by using the capacitance type touch sensor system 4 has been described.
- the shape detection method of the touch sensor system 4 that generates a ghost may be used.
- the first embodiment can be applied to prevent ghosts.
- FIG. 20 is a block diagram illustrating a configuration example of the touch sensor system identifier 1A according to the second embodiment of the present invention.
- the touch sensor system identifier 1 ⁇ / b> A includes a conductive pattern portion 2 in which a conductive pattern 21 having a predetermined shape is arranged facing the screen of the touch panel, and a ground circuit for the conductive pattern 21.
- a conductive pattern 21 having a predetermined shape is arranged facing the screen of the touch panel, and a ground circuit for the conductive pattern 21.
- the touch sensor system identification body 1A is brought into contact with or brought close to the touch panel surface of the touch sensor system 4 that enables the position input operation of an indicator such as a finger, so that a conductive pattern of a predetermined shape that is not grounded.
- the touch sensor system 4 can be read by setting 21 to a virtual ground state.
- the virtual grounding circuit unit 3A includes a conductive pattern connection unit 31 and a ground compensation circuit unit 32A in which the conductive pattern 21 of the conductive pattern unit 2 is connected via the conductive pattern connection unit 31.
- the coil 321 is used as the ground compensation circuit unit 32A so as to function in the same manner as the ground pattern 21 is grounded.
- a coil circuit including one or a plurality of coils 321 is used to form a series resonance circuit with the touch sensor system at the drive signal frequency of the touch sensor system 4 and to the drive signal frequency. Mount a coil with a large energy loss (coil that works in the same way as when grounded).
- the ground compensation circuit unit 32A is used as an energy loss circuit (grounding circuit) for the frequency of the drive signal (AC signal for driving the drive line) of the touch sensor system 4.
- the coil 321 is mounted on the coil 321, and the conductor 322 is disposed around the coil 321.
- the conductor 322 acts as an iron core or a core such as aluminum as well as iron. As a result, it works in the same way as a ground circuit. By this conductor 322, the eddy current loss of the coil 321 is positively promoted, and grounding is more strongly performed.
- the coil 321 is a conductor, it is necessary not to react to the touch sensor system 4.
- the conductive pattern 21 is conductive. Since the member on which the sexual pattern portion 2 is arranged is not grounded and reacts to the touch sensor, a shield process such as a Faraday shield cannot be implemented.
- the conductive pattern connecting portion 31 needs to have a wiring configuration that allows a sufficient distance between the coil 321 and the sensor surface.
- the conductor 322 is mounted around the coil 321, but the conductor 322 needs to be configured so as not to react to the touch sensor system 4.
- FIG. 21 is a perspective view schematically showing a specific example of the touch sensor system identifier 1A according to the second embodiment of the present invention.
- a conductive pattern 21 is provided by printing or vapor deposition on the bottom surface 22 of a rectangular plate having a thickness in plan view, and is connected to the conductive pattern 21 and directly above it by a predetermined distance.
- the coil 321 and the conductor 322 are disposed around the coil 321 as the ground compensation circuit portion 32A in a state where the coil 321 is separated from the coil 321.
- the bottom surface 22 of the plate-like body on which the conductive pattern 21 is formed is placed on the touch panel surface of the touch sensor system 4.
- the ground compensation circuit unit 32A having the coil 321 and the conductor 322 is a conductor, the ground compensation circuit unit 32A having the coil 321 and the conductor 322 and the sensor surface are prevented from reacting to the touch sensor system 4. It is necessary to take enough distance. Although the thickness of the plate-like body on which the conductive pattern 21 is formed on the bottom surface 22 may be increased (for example, 10 mm or more; there is no influence of false detection if the distance is 10 mm), the ground compensation circuit unit 32A is electrically conductive.
- the ground compensation circuit section 32A is erected so as to be separated by a distance (for example, 10 mm or more) that does not react to the touch sensor system 4 via the sexual pattern connection section 31 (here, the ground compensation circuit section 32A is floated by wiring). May be arranged.
- a non-conductive magnetic shield such as ferrite (magnet material) may be provided on the wiring of the conductive pattern connecting portion 31 or the upper surface side of the plate-like body. Further, by reducing the vertical thickness d (thickness in the distance direction with respect to the touch panel surface) of the ground compensation circuit unit 32A, the conductive ground compensation circuit unit 32A is less likely to react to the touch sensor system 4. Can do.
- FIG. 22 is a perspective view schematically showing another specific example of the touch sensor system identifier 1A according to the second embodiment of the present invention.
- a conductive pattern 21 is provided by printing or vapor deposition on the bottom surface 22 of a rectangular plate (which may be card-shaped) in a plan view, and is connected to the conductive pattern 21 and directly beside it.
- a coil 321A is disposed integrally in an adjacent state.
- the bottom surface 22 of the plate-like body on which the conductive pattern 21 is formed is placed on the touch panel surface of the touch sensor system 4.
- a coil 321A and a conductor around it may be arranged.
- the interference of the shape detection with respect to the conductive pattern 21 can be prevented by allowing a touch reaction (position detection) other than the size of the area 321B in which the coil 321A is arranged.
- interference with the shape detection of the conductive pattern 21 can be prevented by not using the detection of the region 321B where the coil 321A is disposed.
- the touch sensor system identifier 1A is mounted at a processing position on the touch panel 41 of the touch sensor system 4, if the mounting direction is made constant while clarifying the front and back, the left region of the touch sensor system identifier 1A This can be easily discarded without adopting the detection result of (region 321B in which the coil 321A is disposed).
- the coil 321A can be mounted without separating the distance of the coil 321A as the ground compensation circuit unit 32A from the sensor surface of the touch sensor system 4 upward.
- a rectangular plate-like body in plan view can be thinly formed on a card-like touch sensor system code identification card as another specific example of the touch sensor system identification body 1A.
- ground compensation circuit unit 32 As a specific example of the ground compensation circuit unit 32, a case where an antenna 325 is realized by a coil 323 described later and an antenna circuit having the antenna 325 is used will be described.
- FIG. 23 is a block diagram illustrating a configuration example of the touch sensor system identifier 1B according to the second embodiment of the present invention.
- a touch sensor system identifier 1B of another configuration example of the second embodiment includes a conductive pattern portion 2 in which a conductive pattern 21 having a predetermined shape is arranged facing the screen of the touch panel, and this conductive pattern.
- a virtual grounding circuit unit 3B having a function equivalent to that of the ground circuit for the sexual pattern 21 and enables position input operation of an indicator such as a finger (grounded indicator) And is used for user authentication.
- the touch sensor system identification body 1B having the virtual grounding circuit portion 3B is grounded by being brought into contact with or approaching the touch panel surface of the touch sensor system 4 that enables the position input operation of an indicator such as a finger.
- the touch sensor system 4 can read the conductive pattern 21 having a predetermined shape that is not in a virtual ground state.
- the virtual grounding circuit unit 3B includes a conductive pattern connection unit 31 and a ground compensation circuit unit 32B in which the conductive pattern 21 of the conductive coat pattern unit 2 is connected via the conductive pattern connection unit 31.
- An antenna 325 is realized by the coil 323 and the loss resistance component 326 as the ground compensation circuit unit 32B so as to function in the same manner as when the conductive pattern 21 is grounded, and an antenna circuit having these is used.
- An antenna 325 targeting the drive signal frequency of the touch sensor system 4 is mounted. The antenna 325 can be grounded more strongly.
- the ground compensation circuit unit 32B is realized by the antenna 325.
- the antenna 325 is equivalently formed from a coil 323 and a loss resistance component 326.
- a series resonance circuit is formed by the coil 323, the loss resistance component 326, and the contact capacitors 324a and 324b. Since it is a series resonance circuit, a loop is equivalently formed in FIG. 23, but it is not actually necessary to form a closed loop.
- this antenna circuit resonates with the frequency of the drive signal of the touch sensor system 4. Since the resonance wavelength with respect to the drive frequency of the touch sensor system 4 exceeds the meter order, a minute antenna shorter than the resonance wavelength is used. Therefore, the larger the size of the antenna 325, the easier it is to radiate. However, since the size of the antenna 325 that can be mounted is determined by the size of the identification body 1B for the touch sensor system, the coil 323 that is the inductance component of the antenna 325 and the contact capacitance Capacitors and inductors may be connected in series so as to compensate for 324a and 324b.
- the antenna 325 actually has a capacitance component, and the conductive pattern connection portion 31 and the conductive pattern portion 2 also have a capacitance component, an inductor component, and a resistance component. Actually, it is necessary to design in consideration of these.
- the conductive pattern connection portion 31 is raised so as not to react to the touch sensor system 4 as in the case of the coil so that the antenna circuit is distanced, or the antenna circuit is placed on the plane of the conductive pattern 21. It can be set as the structure which arrange
- the antenna circuit of the ground compensation circuit unit 32B can also be used in place of the coil 321 or the coil circuit of the 321A of the ground compensation circuit unit 32A of FIGS. However, the antenna circuit of the ground compensation circuit unit 32B may be used together with the coil 321 of the ground compensation circuit unit 32A or the coil circuit of 321A of FIGS.
- the antenna circuit is used to have a function equivalent to that of using the ground circuit for the conductive pattern 21, a ghost is corrected on the controller side of the touch sensor system 4 as in the conventional example, or a sensor is used.
- a ghost is corrected on the controller side of the touch sensor system 4 as in the conventional example, or a sensor is used.
- the detected capacitance signal can be detected more strongly. For this reason, it becomes possible to apply the touch sensor system 4 as an identification tool such as user authentication, so that it can be used for a security authentication system as shown in FIG. 3 or an amusement application. It becomes.
- the touch performance of the existing touch sensor system 4 is not affected. For this reason, it is useful to be able to identify the touch position and the shapes of the identification bodies 1A and 1B using the identification bodies 1A and 1B together with a finger touch or a touch pen.
- the touch sensor system identifier 1A or 1B for detecting a predetermined shape by using the capacitance type touch sensor system 4 has been described.
- the shape of the touch sensor system in which a ghost is generated If it is a detection method, it can be applied to prevent ghosts and increase the detection signal using the second embodiment.
- the conductor 322 is disposed around the coil 321.
- the coil 321 may be simply used as long as the conductive pattern 21 has a function equivalent to that of the ground circuit.
- the ground compensation circuit unit 32B using the coil circuit and / or the antenna circuit has been described.
- the skin effect using an iron plate or the like is used as a material that causes energy loss to realize the ground compensation circuit unit 32B. It may also be a thing that uses dielectric loss using a high dielectric material.
- FIG. 24 is a block diagram illustrating a configuration example of the identifier for the touch sensor system according to the third embodiment of the present invention.
- the touch sensor system identifier 1C has a conductive pattern 23 having a predetermined shape facing the touch panel surface of the touch sensor system 4 that enables a position input operation of an indicator such as a finger.
- a virtual grounding circuit portion 3C that is disposed and has a function equivalent to that of the ground circuit for the conductive pattern 23 is provided as the conductive pattern portion 2C.
- the touch sensor system identification body 1C is brought into contact with or brought close to the touch panel surface of the touch sensor system 4 that enables the position input operation of an indicator such as a finger, so that a conductive pattern of a predetermined shape that is not grounded.
- the touch sensor system 4 can be read by setting 23 to a virtual ground state.
- the conductive pattern 23 having a high impedance with respect to alternating current is configured in a state having the function of the ground compensation circuit portion 32C.
- the direct current resistance is small, and in order to suppress interference between the sensors, the conductive pattern 23 is realized with a structure having a large inductance component.
- a coil having an inductance component coupled between different intersections P1 and P4 is disposed. This coil is provided as a conductive pattern 23 on the surface facing the touch panel surface of the touch sensor system identifier 1C.
- the inductance component can be increased by a microstrip line, a stub structure, a small coil element, or the like.
- 25 (a) to 25 (c) are plan views schematically showing examples of the outer shape of the conductive pattern 23 formed of coils.
- the coils are arranged so that the outer shape of the conductive pattern 23 in a plan view is circular so as to face the touch panel surface of the touch sensor system 4.
- FIG.25 (c) it forms with the coil so that the planar view external shape of the electroconductive pattern 23 may become a square shape.
- a strip-shaped coil in which the outer shape of the conductive pattern 23 in the plan view is arranged in the vertical direction so as to face the touch panel surface of the touch sensor system 4.
- the conductive pattern 23 formed of these coils does not detect the central portion when the detection area becomes wide, but detects the outer shape with a predetermined width. If it is necessary to detect the central portion, a coil may be provided at the central portion. In order to suppress the occurrence of ghost, the inductance component can be increased without increasing the DC resistance.
- FIG. 26A is a schematic diagram showing a planar state in which the touch sensor system identifier 1C having a predetermined conductive pattern 23 is placed on a partial area of the touch panel 41 of the touch sensor system 4 of FIG.
- FIG. 26B is a block diagram illustrating a configuration example of the touch sensor system identifier 1C of FIG.
- FIG. 26B is equivalent to FIG.
- the touch sensor system identification body 1C is placed across the intersections P1 and P4 of the touch panel 41 of the touch sensor system 4.
- the touch sensor system identification body 1C is shown in a shifted manner.
- the rectangular shape in plan view overlaps with two intersections P1 and P4 on the intersection P1 between the drive line 101 and the sense line 111 and on the intersection P4 between the drive line 102 and the sense line 113.
- a touch sensor system identification body 1 ⁇ / b> C is mounted on the touch panel 41. An equivalent circuit at this time is shown.
- FIG. 27 (a) and 27 (b) are plan views schematically showing the conductive pattern 23.
- FIG. 27 (a) and 27 (b) are plan views schematically showing the conductive pattern 23.
- a coil is formed of a conductive material, and the conductive pattern 23 is displayed from the screen of the touch panel 41.
- the planar shape seen it can be formed in various shapes such as an oblique strip shape.
- the conductive pattern 23 itself of the conductive pattern portion 2C is formed by using the coil, and thereby, the function equivalent to that in which the ground circuit is used for the conductive pattern 23. Therefore, it is not necessary to correct the ghost on the controller side of the touch sensor system 4 or discriminate between the ghost and the true touch in the sensor unit as in the conventional example, but to improve the ghost on the identification body 1C side.
- the shape of the identification body 1C viewed from the touch panel surface can be detected more accurately. For this reason, it becomes possible to apply the touch sensor system 4 as an identification tool such as user authentication, whereby it can be used for a security authentication system as shown in FIG. 3 or used for amusement. .
- the touch performance of the existing touch sensor system 4 is not affected. For this reason, the touch position and the touch shape can be identified by using the finger touch or the touch pen in combination with the identification body 1C, which is useful.
- the touch sensor system identification body 1C that detects the shape by using the capacitance type touch sensor system 4 has been described.
- any shape detection method of the touch sensor system that generates a ghost may be used.
- the present embodiment 3 can be applied to prevent ghosts.
- a coil and a conductor coil circuit may be provided around the coil so that the conductive pattern 23 has a function equivalent to that of a ground circuit.
- an antenna circuit may be provided, or a radio wave absorber material may be used for the conductive pattern 23 as a material that causes energy loss at the driving frequency of the touch panel.
- the radio wave absorber refers to a so-called shield material that converts an AC signal having a driving frequency of the touch panel into heat or the like.
- FIG. 28 is a block diagram showing an example of the overall configuration of the touch sensor system 4 according to Embodiment 4 of the present invention.
- the touch sensor system 4 of the fourth embodiment includes a display device 7 having a display screen for image display, a position detection touch panel 41 provided on the display screen, and a flexible device connected to the touch panel 41.
- a connection part 81 such as a printed circuit board (FPC), a control board 82 connected to the connection part 81, a controller part 83 mounted on the control board 82 and performing position detection control processing, and a control board on the controller part 83
- a host terminal 9 connected to the controller unit 83 via the connection cable 84 and connected to the display device 7 to control the display of the display device 7.
- FPC printed circuit board
- the touch panel 41 is provided in parallel with each other along the touch panel surface, and has a plurality of drive lines to which drive signals are respectively applied, and further intersects with the plurality of drive lines (stereoscopic intersection; vertical intersection and other angles). And a plurality of sense lines provided in parallel to each other along the touch panel surface.
- the touch panel 41 responds to a change in capacitance by a contact or proximity indicator (in addition to a finger or a touch pen, or at least one of the touch sensor system identifiers 1 and 1A to 1C of the first to third embodiments).
- Output signals can be output.
- the plurality of output signals from the plurality of sense lines are signals that are output via the intersection P of the drive line and the sense line (both dotted lines) in the touch panel surface and the vicinity thereof when the drive line is driven. .
- the signal from the sense line SL changes. That is, the signal obtained from this sense line is the positional information (x, y) of the two-dimensional detection area E indicating the presence or absence of contact or proximity to the instruction detection area, and the information on the capacitance (z) by the indicator. Is a signal indicating three-dimensional coordinate information. As the Z value of the capacitance information (z) decreases, the signal level indicating the capacitance value decreases.
- the display device 7 may be anything that can display an image on a display screen in addition to a liquid crystal display (liquid crystal display device), a plasma display, an organic EL display, an electrolytic emission display, and the like.
- liquid crystal display liquid crystal display device
- plasma display plasma display
- organic EL display organic EL display
- electrolytic emission display and the like.
- the controller unit 83 drives each drive line and processes a signal from each sense line to detect a touch position and a touch shape (conductive pattern detection region) of the indicator on the touch panel surface.
- the host terminal 9 is configured by a personal computer or the like, and controls the controller unit 83 via the connection cable 84 and also detects the position of the indicator detected by the controller unit 83 (position information (x, y of touch instruction detection area)). )) And the electrostatic capacity information (z), the display of the image displayed on the display screen of the display device 7 is made controllable.
- the host terminal 9 connected to the touch sensor system 4 may be on the server side like a cloud service, and the display can be controlled by providing the function of the host terminal 9 to the touch sensor system 4 itself. is there.
- FIG. 29 is a block diagram illustrating a configuration example of the controller 83 of the touch sensor system 4 of FIG.
- the controller unit 83 processes a plurality of signals from a plurality of sense lines to perform the position of the indicator (position information (x, y) of the instruction detection region) and static on the touch panel surface. It has an indicator position detection unit 830 that detects information (z) of electric capacity, and a drive line drive unit 837 that sequentially drives the drive.
- the indicator position detection unit 830 amplifies a plurality of output signals output from the plurality of sense lines SL, and a signal obtained by acquiring each output signal amplified by the amplification unit 831 and outputting in time division An acquisition unit 832, an A / D conversion unit 833 that converts an analog signal output from the signal acquisition unit 832 into a digital signal, and a digital signal that is A / D converted by the A / D conversion unit 833 in the detection plane P
- the decoding processing unit 834 for obtaining the distribution of the change amount of the capacitance and the position information generation unit 836 described later detect the position of the indicator (position information (x, y) of the instruction detection area) in the touch panel surface.
- a detection reference setting unit 835 that sets a detection reference value (threshold value) to be used, and a touch panel surface based on the detection reference value with respect to the distribution of the amount of change in capacitance obtained by the decoding processing unit 834 The position where the touch position (position information (x, y)) and the touch shape (position information (x, y) of the detection area of the conductive pattern) of the indicator are detected to generate position information indicating the position of the indicator And an information generation unit 836.
- the position information generation unit 836 obtains the touch position (including the area) of the indicator on the touch panel surface using the distribution of the amount of change in capacitance within the touch panel surface and the detection reference obtained by the decoding processing unit 834. To generate position information.
- the position information generation unit 836 obtains the touch position or touch area (conducting pattern shape) in the distribution of the change amount of the electrostatic capacitance in the touch panel surface, and the change amount of the electrostatic capacitance at the touch position or the touch area is obtained. If it is larger than the detection reference value, the touch position or the touch position area can be the touch position or touch area (the shape of the conductive pattern) of the indicator that is in contact with or close to the touch panel surface. If the instruction detection area on the touch panel surface is larger than the predetermined area or different from the predetermined shape, if it is recognized as at least one of the touch sensor system identifiers 1 and 1A to 1C instead of the finger or the touch pen, the conductivity The shape of the sex pattern can be used for code verification. In this manner, the finger or the touch pen can be distinguished from at least one of the identifiers 1 and 1A to 1C not only by the size of the detection area but also by a predetermined shape (difference in shape).
- the upper electrode in FIG. 21 may be a drive line
- the lower electrode may be a sense line
- the upper electrode may be a sense line
- the lower electrode may be a drive line.
- the present invention relates to a touch sensor system identifier for performing user authentication using identification, and touching a ghost in the field of touch sensor systems in which identification is performed and touch or multi-touch input operation is performed.
- the identification body viewed from the touch panel surface by improving the ghost on the identification body side and increasing the detection signal instead of correcting it on the controller side of the sensor system or discriminating the ghost and true touch at the sensor unit Can be detected more accurately.
Abstract
Description
2、2C 導電性パターン部
21、23 導電性パターン
22 底面
3、3A~3C 仮想接地化回路部
31 導電性パターン接続部
32、32A~32C 接地補償回路部
321、321A、323 コイル
321B 領域
322 導体
324a,324b 接触容量
325 アンテナ
326 損失抵抗成分
4、4A、4B、4D タッチセンサシステム
41 タッチパネル
42 指示物体が置かれていない場合の基準の電流信号波形
43 指示物体が置かれた場合の電流信号波形
44~46 容量信号領域(検出領域)
101、102、103、104 ドライブライン
111、112、113、114 センスライン
C1~C3 接触容量
C,Cs 寄生容量
I,I1,I2 電流
P1~P4 交差点
E1 接触物
5 指示物体(指などの接地された指示物体)
6,61,62 フローティング導体
7 表示装置
81 接続部
82 制御基板
83 コントローラ部
830 指示体位置検出部
831 増幅部
832 信号取得部
833 A/D変換部
834 復号処理部
835 検出基準設定部
836 位置情報生成部
837 ドライブライン駆動部
84 接続ケーブル
9 ホスト端末
図1は、本発明の実施形態1におけるタッチセンサシステム用識別体の構成例を示すブロック図である。
図3は、図1のタッチセンサシステム4のタッチパネル41上に仮想接地化回路3を実装したタッチセンサシステム用識別体1を置いたセキュリティ認証例を示す模式図である。
図4は、図1の仮想接地化回路部3の構成例を示すブロック図である。
図5(a)は、図1のタッチセンサシステム4のタッチパネル41の一部平面構成例を模式的に示す模式図であり、図5(b)は、そのタッチパネル41から得られる信号波形図である。
図6(a)は、自己容量方式の静電容量タッチセンサシステム4Aの等価回路図であり、図6(b)は、これの容量検知メカニズムを説明するための等価回路図である。
図8は、相互容量方式の静電容量タッチセンサシステム4Bのタッチパネル上の1か所の交点にフローティング導体を置いた状態の等価回路図であって、図8(a)はドライブラインに印加する駆動信号がロー電圧の場合を示す等価回路図、図8(b)はドライブラインに印加する駆動信号がハイ電圧の場合を示す等価回路図である。
図9は、図1のタッチセンサシステム4のタッチパネルの一部領域上に所定のフローティング導体61を置いた平面状態を示す模式図である。
タッチパネル41上に接触する、複数のセンサ部(例えば図10(a)の交差点P1,P4)に跨る大きさの物体が接地されている場合、図10(b)に示すように位置X1と位置X2との間の電圧に差が生じない。つまりこの時はゴーストは発生しない。
となる。
VωCを打ち消すためにはインダクタンス成分(L成分)が必要であるため、共振周波数ω0より高い駆動周波数ω2で動作させるように、接触物E1の共振設計は駆動周波数より低い周波数で行う。共振周波数ω0として駆動周波数を例えば500KHzとすれば、400KHzに設定して、ωLをωCで打ち消して0に設定する。これが次の式(5)~式(7)で示される。
例えば図10(a)のように複数のセンサ部(交差点P1,P4)に跨って接触物E1が置かれる場合には、図11の容量C1、C2(一つのセンサ部)だけでなく、関連する接触容量を含めて共振設計を行えばよい。
図17は、図1のタッチセンサシステム4のタッチパネル41上に直径20mmの円形の導電性パターン21単体を載せた場合の導電性パターン21の検出例を示す平面図である。
を備えている。
本実施形態2では、導電性パターン21に対する接地回路と同等の機能を持つ接地補償回路部32の具体例として後述するコイル321やアンテナ325の回路を用いた場合について説明する。
本実施形態3では、接地補償回路部32Cのタッチセンサシステム4による反応を避けるために、導電体のコイル回路やアンテナ回路を有する接地補償回路部32Cを用いて導電性パターン部2Cの導電性パターン23を構成する場合について説明する。要するに、導電性パターン自体を導電体のコイル回路やアンテナ回路で構成する場合である。
本実施形態4では、上記実施形態1~3のタッチセンサシステム用識別体1、1A~1Cの少なくともいずれかとこれらに対応したタッチセンサシステム4とを含めたタッチセンサシステム4Dとして構成する場合について説明する。
Claims (8)
- タッチセンサシステムのタッチパネル面に接触または近接して、
該タッチセンサシステムに認識させるための形状である導電性パターンが配置される導電性パターン部と、
該導電性パターン部に接続され、
該タッチセンサシステムで用いる駆動信号の周波数に対して、エネルギーを消費させるエネルギー損失部を有する仮想接地化回路部と
を備えたタッチセンサシステム用識別体。 - 前記エネルギー損失部が直列共振回路で形成されている請求項1に記載のタッチセンサシステム用識別体。
- 前記仮想接地化回路部としてアンテナ回路を使用する請求項1に記載のタッチセンサシステム用識別体。
- 前記エネルギー損失部は前記駆動周波数よりも低い周波数で共振設計されている請求項2または3に記載のタッチセンサシステム用識別体。
- 前記仮想接地化回路部として、
コイル回路または、渦電流損失部を含んだコイル回路を使用する請求項1~4のいずれかに記載のタッチセンサシステム用識別体。 - 前記導電性パターン自体が、前記仮想接地化回路部の一部または全部である請求項1~5のいずれかに記載のタッチセンサシステム用識別体。
- 前記導電性パターン自体が、前記仮想接地化回路部の一部または全部であり、
該導電性パターンがコイルで形成されている請求項1~5のいずれかに記載のタッチセンサシステム用識別体。 - 請求項1~7のいずれかに記載のタッチセンサシステム用識別体を、位置入力操作を可能とする前記タッチパネル面上に搭載することにより、該タッチセンサシステム用識別体の導電性パターンの形状を読み取って識別可能とするタッチセンサシステム。
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US15/313,324 US20170192612A1 (en) | 2014-05-28 | 2015-04-23 | Identifying body for touch-sensor system and touch-sensor system |
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JP2018005728A (ja) * | 2016-07-06 | 2018-01-11 | 株式会社セガゲームス | 指示デバイス、及び製造方法 |
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