KR20170024434A - Single plate touch sensor advanced touch sensitivity - Google Patents

Single plate touch sensor advanced touch sensitivity Download PDF

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Publication number
KR20170024434A
KR20170024434A KR1020150119707A KR20150119707A KR20170024434A KR 20170024434 A KR20170024434 A KR 20170024434A KR 1020150119707 A KR1020150119707 A KR 1020150119707A KR 20150119707 A KR20150119707 A KR 20150119707A KR 20170024434 A KR20170024434 A KR 20170024434A
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electrode
receiving
driving
trace
driving electrode
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KR1020150119707A
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Korean (ko)
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KR102025283B1 (en
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이범우
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주식회사 엘지화학
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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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

The present invention provides a one-sided touch sensor in which the touch sensitivity is improved by changing the electrode structure of the one-sided touch sensor.
More specifically, the cross-sectional touch sensor electrode structure is formed symmetrically to increase the sensitivity of the touch sensor by making the intensity of signals applied to the two reception electrodes Rx1 and Rx2 equal to each other
Thereby providing a single-sided touch sensor.

Description

[0001] The present invention relates to a single-plate touch sensor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode structure of a single-sided touch sensor, and more particularly, to an apparatus for improving a touch sensitivity and a resolution by eliminating a dead zone.

The touch sensor can be divided into a laminated touch sensor that detects a touch position by stacking several sensing layers and a one-touch sensor that senses a touch area as a sensing layer. The laminated touch sensor includes a horizontal position sensing layer including a driving electrode for sensing a horizontal position, a vertical position sensing layer including a reception electrode for sensing a vertical position, Shielding layer.

As described above, there is a disadvantage in that the thickness of a laminated touch sensor that senses a touch position with two sensing layers and a shield layer increases the size of the product.

As an alternative to this, a single-sided touch sensor that senses a touch position using only one sensing layer is advantageous in that the size of the product is reduced by only one layer.

However, in the single-sided touch sensor, both the driving electrode and the receiving electrode used in the two layers of the laminated structure are formed in one sensing layer. In this case, in the conventional structure, the receiving electrode traces are disposed between the driving electrode and the receiving electrode, There was a difficulty in signal processing of the receiving electrode.

The present invention provides a one-sided touch sensor in which the touch sensitivity is improved by changing the electrode structure of the one-sided touch sensor.

More specifically, the single-sided touch sensor electrode structure is symmetrically formed to increase the sensitivity of the touch sensor by equalizing the intensity of signals applied to the two receiving electrodes Rx1 and Rx2.

The present invention relates to a one-sided touch sensor including a plurality of sensing regions arranged in a two-dimensional array to form a sensing region and a controller for controlling a touch sensor signal, A first receiving electrode and a second receiving electrode receiving the driving signal and spaced apart from the driving electrode by a predetermined distance, a driving electrode trace region through which a driving electrode trace connecting the driving electrode and the control unit is wired, A first receiving electrode trace connecting the first receiving electrode and the control unit, and a second receiving electrode trace connecting the second receiving electrode and the control unit.

And a direction perpendicular to the X-axis direction is a Y-axis direction, the first receiving electrode has a predetermined area And the second receiving electrode is disposed within a second quadrant of the virtual orthogonal coordinate system set to the X axis and the Y axis, the second receiving electrode has a predetermined region, and the fourth quadrant of the virtual orthogonal coordinate system set to the X axis and the Y axis Wherein the driving electrode is arranged in a first quadrant and a third quadrant of a virtual orthogonal coordinate system set in the X and Y axes, a predetermined region arranged in the first quadrant, Wherein the connection region is formed by connecting the first receiving electrode and the second receiving electrode so that a region overlapping the first receiving electrode and the second receiving electrode is not generated, Of the new electrode and the predetermined distance it is disposed spaced apart.

The first receiving electrode is disposed so as to be spaced apart from the driving electrode in the first quadrant by a predetermined distance D1 in the X axis direction and a predetermined distance D2 in the Y axis direction is different from the driving electrode in the third quadrant, And the second receiving electrode is disposed so as to be spaced apart from the driving electrode in the third quadrant by a predetermined distance D3 from the driving electrode in the second quadrant, The first receiving electrode trace is spaced apart from the first receiving electrode by a predetermined distance D5 and is wired along the Y axis to the opposite side of the second receiving electrode with respect to the Y axis, The electrode trace is spaced apart from the second receiving electrode by a predetermined distance D6 and is wired along the Y axis to the opposite side of the first receiving electrode with respect to the Y axis, A driving electrode trace region to which the driving electrode traces are wired is disposed between the driving electrode and the first and second receiving electrodes and between the driving electrode and the first and second receiving electrode traces.

The distance (D1 to D4) between the driving electrode and the first and second receiving electrodes is a value between 300 mu m and 450 mu m.

The distance (D1 to D4) between the driving electrode and the first and second receiving electrodes is determined by a distance between the driving electrode traces and the first receiving electrode, which are closest to the first receiving electrode or the second receiving electrode, A distance between a receiving electrode and a driving electrode trace set by a distance between two receiving electrodes and a distance between a driving electrode trace and a driving electrode closest to the first receiving electrode or the second receiving electrode of the driving electrode traces of the driving electrode trace region, And the distance between the driving electrode-driving electrode traces is set to a value obtained by adding the number n of driving electrode traces X (between adjacent driving electrode traces and between the driving electrode and the driving electrode traces, The distance between the traces (s) + one driving electrode trace width (w)).

The one driving electrode trace width (w) is set to 30 μm or less, and the distance between the receiving electrode and the driving electrode traces is set to 100 μm or more.

By changing the electrode structure of the one-sided touch sensor, the dead zone is reduced and the sensitivity of the touch sensor is improved.

Further, by changing the electrode structure of the one-sided touch sensor, the difference in capacitance between the first receiving electrode and the second receiving electrode can be made similar to each other, thereby facilitating signal analysis.

1 is a conventional cross-sectional touch sensor structure.
2 is a structure of a detection region in the one-sided touch sensor of the present invention.
3 is an electrode structure of the present invention.
4 is an electrode structure of an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know.

1 is an electrode structure of a conventional one-sided touch sensor.

1, a trace 111 of the first receiving electrode 110 is wired between the driving electrode 130 and the second receiving electrode 120 to form a first receiving electrode trace 111 signal There is a case in which noise due to noise is generated.

Accordingly, in the present invention, it is possible to improve the sensitivity of the touch sensor by reducing the dead zone by reducing the noise phenomenon caused by the first receiving electrode traces 111 by changing the conventional electrode structure.

2, the one-sided touch sensor of the present invention includes a plurality of sensing areas 300 arranged in a two-dimensional manner to form a sensing area 200 and a control part 400.

3, the electrode structure of the present invention includes one driving electrode 330, two receiving electrodes (a first receiving electrode 310 and a second receiving electrode 320) A driving electrode trace region 340, a first receiving electrode trace 311, and a second receiving electrode trace 321.

More specifically, when one of a horizontal or vertical direction of the sensing region is defined as an X-axis direction and a direction perpendicular to the X-axis direction is referred to as a Y-axis direction based on the center of the sensing region, 310 are disposed in a second quadrant of a virtual orthogonal coordinate system set to the X axis and the Y axis and the second receiving electrode 320 is disposed in a fourth quadrant of the virtual orthogonal coordinate system set to the X axis and the Y axis, Wherein the driving electrode 330 is disposed within the first quadrant and the third quadrant and a connection region connecting the predetermined region disposed within the first quadrant and the predetermined region disposed within the third quadrant, Area.

The connection region connects a predetermined region of the driving electrode 330 disposed in the first quadrant and a predetermined region of the driving electrode 330 disposed in the third quadrant, The second receiving electrode 320 and the second receiving electrode 320. The first receiving electrode 310 and the second receiving electrode 320 are spaced apart from each other by a predetermined distance,

More specifically, the first receiving electrode 310 is spaced apart from the driving electrode 330 in the first quadrant by a predetermined distance D1 in the X-axis direction, and the driving electrode 330 ) By a predetermined distance D2 in the Y-axis direction.

The second receiving electrode 320 is spaced apart from the driving electrode 330 in the third quadrant by a predetermined distance D3 in the X-axis direction, and the driving electrode 330 disposed in the first quadrant, Axis direction by a predetermined distance D4.

The distances D 1 and D 2 between the first receiving electrode 310 and the driving electrode 330 and the distance D 3 and D 4 between the second receiving electrode 320 and the driving electrode 330 are 300 μm Lt; RTI ID = 0.0 > 450um. ≪ / RTI >

The first receiving electrode trace 311 is a wire connecting the first receiving electrode 310 and the control unit 400 and the second receiving electrode trace 321 is a wiring connecting the second receiving electrode 320 and the control unit 400. [ 400).

A first receiving electrode trace 311 connecting the first receiving electrode 310 and the control unit 400 is spaced apart from the first receiving electrode 310 by a predetermined distance D5, The second receiving electrode trace 321 connecting the second receiving electrode 320 is spaced apart from the second receiving electrode 320 by a predetermined distance D6, And is wired along the Y axis to the opposite side of the first receiving electrode 310 with respect to the Y axis.

The driving electrode trace region 340 is a region in which a driving electrode trace connecting the driving electrode 330 and the control unit 400 and supplying a driving signal to the driving electrode is wired.

The driving electrode trace region 340 is formed between the driving electrode 330 and the first receiving electrode 310 and the second receiving electrode 320 and between the driving electrode 330 and the first receiving electrode trace 311, And is wired between the electrode traces 321.

More specifically, the distance (D1 to D4) between the driving electrode and the first and second receiving electrodes is determined by the distance between the first receiving electrode 310 or the second receiving electrode 320 among the driving electrode traces in the driving electrode tracing region 340, A distance A2 between the reception electrode and the drive electrode trace set by the nearest drive electrode trace and a drive distance between the first reception electrode 310 and the second reception electrode 320 among the drive electrode traces of the drive electrode trace region And the distance A1 between the receiving electrode and the driving electrode trace set by the distance between the electrode trace and the driving electrode 330. [

The distance A1 between the driving electrode and the driving electrode traces is determined by the number (n) X of driving electrode traces wired to the driving electrode and the first receiving electrode or the second receiving electrode (distance (s) + The driving electrode trace width (w) of the driving electrode).

Preferably, the one driving electrode width w is less than or equal to 30 micrometers, and the distance between the receiving electrode and driving electrode traces is greater than or equal to 100 micrometers.

The distances D1 and D2 between the driving electrode 330 and the first receiving electrode 310 and the distances D3 and D4 between the driving electrode 330 and the second receiving electrode 320, Is set to a value between 300 [mu] m and 450 [mu] m.

As described above, when the first receiving electrode traces 311 and the second receiving electrode traces 321 are disposed at the outer periphery of the sensing region, the first receiving electrode traces 111 2 receiving electrode traces) are disposed between the second receiving electrode 120 (or the first receiving electrode) and the driving electrode 130 so that the first receiving electrode traces 111 (or the second receiving electrode traces) It is possible to solve the problem that it is difficult to analyze the touch signal by influencing the touch panel 120 (or the first receiving electrode).

When the distances D1 and D2 between the driving electrode 330 and the first receiving electrode 310 and the distances D3 and D4 between the driving electrode 330 and the second receiving electrode 320 are all the same The sensing area 300 has a symmetrical structure and there is no difference in driving signals applied to the first receiving electrode 310 and the second receiving electrode 320.

In the symmetrical structure in which there is no signal difference between the driving electrode 33 and the first receiving electrode 310 or the second receiving electrode 320, The number of cases in which the receiving electrode generates noise to the other receiving electrodes is reduced, thereby facilitating signal analysis and reducing the possibility of malfunction of the touch sensor.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.

FIG. 4 is an enlarged view of one sensing area when one sensing area 300 is applied to a 7-inch tablet having a size of 6 mm x 10.82 mm, according to the electrode structure and the trace structure of the present invention.

In the embodiment of the present invention, when one sensing area 300 is applied to a 7-inch tablet having a size of 6 mm x 10.82 mm, the sensing area of the tablet is structured such that 14 sensing areas are arranged vertically.

When fourteen sensing areas 300 are arranged vertically, first to fourteenth driving electrodes that are different from each other are disposed for each sensing area 300, and first to fourteenth driving electrode traces 341 to 347 , 351 to 357 are connected.

The first to fourth driving electrode traces 341 to 347 and 351 to 357 are wired between the first receiving electrode 310 and the driving electrode 330 and the second receiving electrode 320 and the driving electrode 330, 7 < / RTI >

The first to fourteenth driving electrode traces 341 to 347 and 351 to 357 are disposed between the first receiving electrode 310 and the driving electrode 330 and between the second receiving electrode 320 and the driving electrode 330 The reason for wiring the first to fourth driving electrode traces 341 to 347 and 351 to 357 is to divide the first to fourth driving electrode traces 341 to 347 and 351 to 357 between the first receiving electrode 310 and the driving electrode 330 or the second receiving electrode 320 Electrodes 341 to 347 and 351 to 357 are disposed between the driving electrode 330 and the electrode 330, the interval between the driving electrode 330 and the receiving electrode is distant from the interval between the first to fourteenth driving electrode traces 341 to 347 and 351 to 357 The driving electrode traces 341 to 347 out of the first to fourteenth driving electrode traces 341 to 347 and 351 to 357 have the first receiving electrode 310 and the second receiving electrode traces 341 to 347, Is wired between the driving electrodes 330, and the remaining seven driving electrode trays 351 to 357 are wired between the second receiving electrode 320 and the driving electrode 330.

The first to fourteenth driving electrode traces 341 to 347 and 351 to 357 arranged in the above-described manner are formed such that the width of each of the driving electrode traces is 27 mu m, the distance between adjacent driving electrodes, And the drive electrode trace is 3 [mu] m.

Therefore, the distance between the driving electrode-driving electrode traces in the embodiment of the present invention is determined by the number (n) X of driving electrode traces wired between the driving electrode and the first receiving electrode or the second receiving electrode (the distance between adjacent driving electrode traces and The distance between the receiving electrode and driving electrode traces is 7 x (3 um + 27 um) = 210 m by the formula of the distance s between the driving electrode and the driving electrode trace adjacent to each other + the width w of one driving electrode trace) And the distance D1 to D4 between the driving electrode 330 and the first receiving electrode 310 or the second receiving electrode 320 is set to 330 mu m.

Referring to Table 1, in the above-described preferred embodiment, the first driving electrode traces 341 are arranged such that the noise affecting the electrostatic capacitance of the first receiving electrode 310 is less than the electrostatic capacitance of the driving electrode 330 received at the first receiving electrode The first to fourth drive electrode traces 341 and 342 are set to values within a range in which the touch recognition can be correctly recognized by less than 20% while the values between the drive electrode 330 and the first reception electrode or the second reception electrode are fixed. The distance between the first driving electrode traces 341 and the first receiving electrodes 310 and the distance between the second driving electrode traces 351 and the second receiving electrodes 351, The noise between the first driving electrode traces 341 and the second driving electrode traces 351 on the capacitances of the first receiving electrode 310 and the second receiving electrode 320 becomes 29% And the correct touch recognition becomes difficult.

Trace width 27um (3um gap between traces), Tx - Rx Gap 330um,
Rx - nearest Tx trace spasing 120um Unit: pF Tx 13 Tx11_trace Tx9_trace Tx7_trace Tx5_trace Tx3_trace Tx1_trace Rx1 0.34144 0.02497 0.02796 0.03208 0.03772 0.04687 0.06152 Noise ratio 7% 8% 9% 11% 14% 18% Unit: pF Tx 14 Tx12_trace Tx10_trace Tx8_trace Tx6_trace Tx4_trace Tx2_trace Rx2 0.34217 0.02494 0.02791 0.03201 0.03762 0.04674 0.06229 Noise ratio 7% 8% 9% 11% 14% 18% Trace width 32um (3um gap between traces), Tx - Rx Gap 330um,
Rx - nearest Tx trace spasing 85um Unit: pF Tx 13 Tx11_trace Tx9_trace Tx7_trace Tx5_trace Tx3_trace Tx1_trace Rx1 0.31071 0.02872 0.03495 0.04331 0.05469 0.07031 0.09843 Noise ratio 8% 10% 13% 16% 20% 29% Unit: pF Tx 14 Tx12_trace Tx10_trace Tx8_trace Tx6_trace Tx4_trace Tx2_trace Rx2 0.31137 0.02868 0.03489 0.04321 0.05455 0.07011 0.09966 Noise ratio 8% 10% 13% 16% 20% 29% Trace width 37um (3um gap between traces), Tx - Rx Gap 330um,
Rx - nearest Tx trace spasing 50um Unit: pF Tx 13 Tx11_trace Tx9_trace Tx7_trace Tx5_trace Tx3_trace Tx1_trace Rx1 0.27315 0.02996 0.03634 0.04491 0.05658 0.07499 0.12919 Noise ratio 9% 11% 13% 16% 22% 38% Unit: pF Tx 14 Tx12_trace Tx10_trace Tx8_trace Tx6_trace Tx4_trace Tx2_trace Rx2 0.27373 0.02992 0.03628 0.04487 0.05643 0.07478 0.13080 Noise ratio 9% 11% 13% 16% 22% 38%

When the widths of the first to fourteenth driving electrode traces 341 to 347 and 351 to 357 are increased to 37 μm in a state where the values between the driving electrode 330 and the first receiving electrode or the second receiving electrode are fixed The distance between the first driving electrode traces 341 and the first receiving electrodes 310 and the distance between the second driving electrode traces 351 and the second receiving electrodes 320 become close to each other, And the second driving electrode traces 351 increase the capacitances of the first receiving electrode 310 and the second receiving electrode 320 to 38%, respectively, so that correct touch recognition becomes more difficult.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention.

310: driving electrode 340: driving electrode trace region
320: first receiving electrode 321: first receiving electrode trace
330: second receiving electrode 331: second receiving electrode trace

Claims (5)

1. A one-sided touch sensor comprising a plurality of sensing areas arranged two-dimensionally to form a sensing area and to control a touch sensor signal,
The plurality of sensing areas
A driving electrode for supplying a driving signal;
A first receiving electrode and a second receiving electrode receiving the driving signal and spaced apart from the driving electrode by a predetermined distance;
A driving electrode trace region in which a driving electrode trace connecting the driving electrode and the control unit is wired;
A first receiving electrode trace connecting the first receiving electrode and the control unit, and a second receiving electrode trace connecting the second receiving electrode and the control unit;
Wherein the touch sensor is configured to include: The method according to claim 1,
One of a horizontal direction and a vertical direction of the sensing region is defined as an X-axis direction with respect to the center of the sensing region;
When a direction perpendicular to the X-axis direction is a Y-axis direction,
Wherein the first receiving electrode has a predetermined area and is disposed in a second quadrant of the virtual orthogonal coordinate system set in the X and Y axes,
Wherein the second receiving electrode has a predetermined area and is disposed in a fourth quadrant of the virtual orthogonal coordinate system set in the X and Y axes,
Wherein the driving electrode comprises: a predetermined region disposed in a first quadrant and a third quadrant of the virtual orthogonal coordinate system set in the X and Y axes; a predetermined region disposed in the first quadrant; and a predetermined region disposed in the third quadrant, And a connection area for connecting the area of the first antenna to the second antenna,
Wherein the connection region is spaced apart from the first reception electrode and the second reception electrode by a predetermined distance so that a region overlapping the first reception electrode and the second reception electrode is not generated. The method of claim 2,
The first receiving electrode is disposed so as to be spaced apart from the driving electrode in the first quadrant by a predetermined distance D1 in the X axis direction and a predetermined distance D2 in the Y axis direction is different from the driving electrode in the third quadrant, Respectively,
Wherein the second receiving electrode is spaced apart from the driving electrode in the third quadrant by a predetermined distance D3 in the X axis direction and is spaced apart from the driving electrode in the first quadrant by a predetermined distance D4 in the Y axis direction Respectively,
The first receiving electrode trace is spaced apart from the first receiving electrode by a predetermined distance D5 and is wired along the Y axis to the opposite side of the second receiving electrode with respect to the Y axis,
The second receiving electrode trace is spaced apart from the second receiving electrode by a predetermined distance D6 and is wired along the Y axis to the opposite side of the first receiving electrode with respect to the Y axis,
Wherein the driving electrode trace region in which the driving electrode traces are wired is disposed between the driving electrode and the first and second receiving electrodes and between the driving electrode and the first and second receiving electrode traces. The method of claim 3,
Wherein a distance (D1 to D4) between the driving electrode and the first and second receiving electrodes is between 300 mu m and 450 mu m. The method of claim 4,
The distance (D1 to D4) between the driving electrode and the first and second receiving electrodes
A distance between a receiving electrode-driving electrode trace set by a distance between a driving electrode trace closest to the first receiving electrode or the second receiving electrode and a first receiving electrode or a second receiving electrode among the driving electrode traces of the driving electrode trace region, ; And
A distance between a driving electrode and a driving electrode trace set by a distance between a driving electrode trace and a driving electrode closest to a first receiving electrode or a second receiving electrode of the driving electrode traces in the driving electrode trace region;
Is set,
The distance between the driving electrode-driving electrode traces
(N) X (distance between adjacent drive electrode traces and distance between drive electrode and drive electrode traces (s) + one drive electrode trace width (w))
Lt; / RTI >
Wherein the one drive electrode trace width (w) is less than or equal to 30 [mu] m,
Wherein the distance between the receiving electrode and the driving electrode trace is set to be equal to or greater than 100 < RTI ID = 0.0 > um. ≪ / RTI &
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109947288A (en) * 2019-02-27 2019-06-28 武汉华星光电半导体显示技术有限公司 A kind of embedded touch control panel and manufacturing method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230085302A (en) 2021-12-07 2023-06-14 주식회사 엘엑스세미콘 Touch sensing apparatus, and touch sensing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110007220A (en) * 2008-04-25 2011-01-21 애플 인크. Ground guard for capacitive sensing
KR101474350B1 (en) * 2013-10-24 2014-12-18 주식회사 리딩유아이 Touch panel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110007220A (en) * 2008-04-25 2011-01-21 애플 인크. Ground guard for capacitive sensing
KR101474350B1 (en) * 2013-10-24 2014-12-18 주식회사 리딩유아이 Touch panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109947288A (en) * 2019-02-27 2019-06-28 武汉华星光电半导体显示技术有限公司 A kind of embedded touch control panel and manufacturing method

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