KR102025283B1 - Single plate touch sensor advanced touch sensitivity - Google Patents

Single plate touch sensor advanced touch sensitivity Download PDF

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Publication number
KR102025283B1
KR102025283B1 KR1020150119707A KR20150119707A KR102025283B1 KR 102025283 B1 KR102025283 B1 KR 102025283B1 KR 1020150119707 A KR1020150119707 A KR 1020150119707A KR 20150119707 A KR20150119707 A KR 20150119707A KR 102025283 B1 KR102025283 B1 KR 102025283B1
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South Korea
Prior art keywords
electrode
receiving
trace
driving
receiving electrode
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KR1020150119707A
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Korean (ko)
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KR20170024434A (en
Inventor
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

Abstract

The present invention provides a single-sided touch sensor with improved touch sensitivity by changing the electrode structure of the single-sided touch sensor.
More specifically, the cross-sectional touch sensor electrode structure is configured symmetrically to make the intensity of the signal applied to the two receiving electrodes Rx1 and Rx2 the same, thereby improving the sensitivity of the touch sensor.
Provides a single-sided touch sensor.

Description

Single plate touch sensor advanced touch sensitivity}

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 touch sensitivity and resolution by eliminating dead zones.

The touch sensor may be classified into a stacked touch sensor that detects a touch position by stacking a plurality of sensing layers and a single-sided touch sensor that senses a touch area with one sensing layer. The stacked touch sensor blocks a horizontal position sensing layer configured as a driving electrode for sensing a horizontal position, a vertical position sensing layer configured as a receiving electrode for sensing a vertical position, and electrical noise for the horizontal sensing layer and the vertical sensing layer. It consists of a shielding layer for.

As described above, the stacked touch sensor that senses a touch position by using two sensing layers and a shielding layer has a drawback in that the thickness of the product increases.

As an alternative to this, the single-sided touch sensor that detects the touch position using only one sensing layer has an advantage of reducing the size of the product by configuring only one layer.

However, the single-sided touch sensor configures both the driving electrode and the receiving electrode used in the two layers of the stacked structure in one sensing layer. In this case, in the conventional structure, the receiving electrode trace is 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 single-sided touch sensor with improved touch sensitivity by changing the electrode structure of the single-sided touch sensor.

More specifically, the cross-sectional touch sensor electrode structure is configured symmetrically to equalize the intensity of the signal applied to the two receiving electrodes (Rx1, Rx2) to provide a single-sided touch sensor with improved sensitivity of the touch sensor.

The present invention relates to a single-sided touch sensor configured by a plurality of sensing regions arranged in two dimensions to form a detection region, and including a control unit for controlling a touch sensor signal, wherein the plurality of sensing regions are configured to supply a driving signal. An electrode, a driving electrode trace region in which a first receiving electrode and a second receiving electrode receiving the driving signal and spaced apart from the driving electrode by a predetermined distance, and a driving electrode trace connecting the driving electrode and the control unit are wired; And 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.

When the horizontal or vertical direction of the sensing area is the X-axis direction and the direction perpendicular to the X-axis direction is the Y-axis direction with respect to the center of the sensing area, the first receiving electrode is a predetermined area. And a fourth quadrant of the virtual quadrature coordinate system set in the X and Y axes, and the second receiving electrode having a predetermined region, and a fourth quadrant of the virtual quadrature coordinate system set in the X and Y axes. And a driving region disposed in the first and third quadrants of the virtual Cartesian coordinate system set in the X and Y axes, and a predetermined region and a third quadrant disposed in the first quadrant. And a connection area for connecting a predetermined area disposed in the connection area, wherein the connection area includes a first reception electrode and a second area such that an area overlapping the first and second reception electrodes does not occur. Of the new electrode and the predetermined distance it is disposed spaced apart.

The first receiving electrode is disposed to be spaced apart from the driving electrode in the first quadrant by a predetermined distance D1 in the X-axis direction, and the predetermined distance D2 is spaced apart from the driving electrode in the third quadrant in the Y-axis direction. The second receiving electrode is disposed to be spaced apart from the driving electrode in the third quadrant by a predetermined distance D3 in the X axis direction, and the predetermined distance (D) in the Y axis direction with the driving electrode in the first quadrant. D4) is spaced apart from each other, the first receiving electrode trace is spaced apart from the first receiving electrode at a predetermined interval D5 and wired along the Y axis to the second receiving electrode opposite to the Y axis, and the second receiving The electrode trace is spaced apart from the second receiving electrode at a predetermined interval D6 and is wired along the Y axis to the opposite side of the first receiving electrode with respect to the Y axis, and the driving electrode trace is wired. Is disposed between the between the drive electrode and the first and second receiving electrode and the drive 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 um and 450 um.

The distance D1 to D4 between the driving electrode and the first and second receiving electrodes may include a driving electrode trace and a first receiving electrode or the first receiving electrode closest to the first receiving electrode or the second receiving electrode among the driving electrode traces of the driving electrode trace area. 2 The distance between the receiving electrode and the driving electrode trace set by the distance between the receiving electrodes and the distance between the driving electrode trace and the driving electrode closest to the first receiving electrode or the second receiving electrode among the driving electrode traces of the driving electrode trace area. The distance between the drive electrode-drive electrode traces set by the sum of the drive electrode-drive electrode traces is set, and the distance between the drive electrode-drive electrode traces is the number of drive electrode traces (n) X (between the adjacent drive electrode traces and between the drive electrodes and the drive electrodes). The distance between the traces (s) + one drive electrode trace width (w).

And the one driving electrode trace width w is 30 um or less, and the distance between the receiving electrode and the driving electrode trace is set to 100 um or more.

By changing the electrode structure of the single-sided touch sensor, the dead zone is reduced to improve the sensitivity of the touch sensor.

Further, by changing the electrode structure of the single-sided touch sensor, signal analysis is facilitated by making the mutual capacitance difference received by the first receiving electrode and the second receiving electrode similar.

1 is a conventional sectional touch sensor structure.
2 is a structure of a detection area in the single-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, with reference to the accompanying drawings will be described an embodiment of the present invention; However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you.

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

Referring to FIG. 1, the trace 111 of the first receiving electrode 110 is wired between the driving electrode 130 and the second receiving electrode 120 to signal the first receiving electrode trace 111 to the second receiving electrode 120. There is a case where noise occurs due to.

Accordingly, in the present invention, the sensitivity of the touch sensor may be improved by reducing the noise phenomenon caused by the first receiving electrode trace 111 and reducing the dead zone by changing the conventional electrode structure.

Referring to FIG. 2, the single-sided touch sensor according to the present invention includes a plurality of sensing regions 300 arranged in two dimensions to form a detection region 200 and include a controller 400.

More specifically, referring to FIG. 3, the electrode structure of the present invention includes one driving electrode 330 and two receiving electrodes (first receiving electrode 310 and second receiving electrode 320). The driving electrode trace area 340 includes a first receiving electrode trace 311 and a second receiving electrode trace 321.

More specifically, when one of the horizontal or vertical direction of the sensing area with respect to the center of the sensing area in the X-axis direction, the direction perpendicular to the X-axis direction is called the Y-axis direction, the first receiving electrode ( 310 is disposed in the second quadrant of the virtual rectangular coordinate system set to the X-axis and the Y-axis, and the second receiving electrode 320 is the fourth quadrant of the virtual rectangular coordinate system to the X-axis and the Y-axis. The driving electrode 330 is connected to connect a predetermined region disposed in the first and third quadrants, a predetermined region disposed in the first quadrant, and a predetermined region disposed in the third quadrant. It is configured to include an 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, wherein the first receiving electrode 310 and the first region The first and second receiving electrodes 310 and 320 may be spaced apart from each other by a predetermined distance such that the regions overlapping the second receiving electrodes 320 do not occur.

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

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

The separation distances D1 and D2 between the first receiving electrode 310 and the driving electrode 330 and the separation distances D3 and D4 between the second receiving electrode 320 and the driving electrode 330 are 300 μm. It is preferable to have a value between 450um.

Meanwhile, the first receiving electrode trace 311 is a wire connecting the first receiving electrode 310 and the controller 400, and the second receiving electrode trace 321 is the second receiving electrode 320 and the controller ( 400 is a wiring for connecting.

The first receiving electrode trace 311 connecting the first receiving electrode 310 and the controller 400 is spaced apart from the first receiving electrode 310 by a predetermined distance D5 to receive a second reception based on the Y axis. The second receiving electrode trace 321, which is wired along the Y axis to the opposite side of the electrode 320 and connects the second receiving electrode 320, is spaced apart from the second receiving electrode 320 by a predetermined distance D6. The Y-axis is wired along the Y-axis to the opposite side of the first receiving electrode 310.

Meanwhile, the driving electrode trace area 340 is a region in which a driving electrode trace for connecting the driving electrode 330 and the controller 400 to supply the driving signal to the driving electrode is wired.

The driving electrode trace area 340 is between the driving electrode 330, the first receiving electrode 310, and the second receiving electrode 320, and the driving electrode 330, the first receiving electrode trace 311, and the second receiving electrode. It 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 may be equal to the first receiving electrode 310 or the second receiving electrode 320 among the driving electrode traces in the driving electrode trace area 340. The driving distance closest to the first receiving electrode 310 or the second receiving electrode 320 among the driving electrode traces in the driving electrode trace area and the distance A2 between the receiving electrode and the driving electrode traces set by the closest driving electrode trace. It is set to the sum of the distances A1 between the receiving electrode-driven electrode traces set by the distance between the electrode traces and the drive electrode 330.

The distance A1 between the driving electrode and the driving electrode trace is the number of driving electrode traces to be routed between the driving electrode and the first receiving electrode or the second receiving electrode (n) X (the distance s between the adjacent adjacent driving electrode traces + one). Drive electrode trace width w).

Preferably, the one driving electrode width w is 30 um or less, and the distance between the receiving electrode and the driving electrode traces is 100 um or more.

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 set as described above. Is preferably set to a value between 300um and 450um.

As described above, when the first receiving electrode trace 311 and the second receiving electrode trace 321 are disposed outside the sensing area, the first receiving electrode trace 111 (or the first receiving electrode trace 111 in the conventional single-sided touch sensor structure). The second receiving electrode trace is disposed between the second receiving electrode 120 (or the first receiving electrode) and the driving electrode 130 so that the first receiving electrode trace 111 (or the second receiving electrode trace) is the second receiving electrode. The problem of affecting the 120 (or the first receiving electrode), which is difficult to interpret the touch signal, may be solved.

And 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 the same. The sensing region 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.

As described above, in the symmetrical structure in which there is no signal difference between the driving electrode 33 applied to the first receiving electrode 310 and the second receiving electrode 320, either one of the first receiving electrode 310 and the second receiving electrode 320 may be used. The case in which the receiving electrode generates noise on the other receiving electrode 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. 4.

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

According to an 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 detection area of the tablet has 14 sensing areas arranged vertically.

When 14 sensing regions 300 are vertically arranged, different first to fourteenth driving electrodes are disposed in each sensing region 300, and first to fourteenth driving electrode traces 341 to 347 for each driving electrode. , 351 to 357 are connected.

The first to fourteenth driving electrode traces 341 to 347 and 351 to 357 are connected to each other between the first receiving electrode 310 and the driving electrode 330, and the second receiving electrode 320 and the driving electrode are connected to each other. Seven are wired in between.

The first to fourteenth driving electrode traces 341 to 347 and 351 to 357 are placed 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 why the wiring is divided into pieces is that the first to fourteenth driving electrode traces 341 to 347 and 351 to 357 are driven between the first receiving electrode 310 and the driving electrode 330 or the second receiving electrode 320. When only one of the electrodes 330 is disposed between the electrodes 330, the gap between the driving electrode 330 and the receiving electrode becomes far between the first to fourteenth driving electrode traces 341 to 347 and 351 to 357. Since the sensitivity of the touch sensor is severely degraded, seven driving electrode traces 341 to 347 of the first to fourteenth driving electrode traces 341 to 347 and 351 to 357 are respectively connected to the first receiving electrode 310. Wired between the drive electrodes 330, the remaining seven drive electrode trays The switches 351 to 357 are wired between the second receiving electrode 320 and the driving electrode 330.

Meanwhile, the first to fourteenth driving electrode traces 341 to 347 and 351 to 357 disposed as described above have a width of 27 um for each of the driving electrode traces, and the distance between the driving electrodes adjacent to each other and the driving electrodes adjacent to each other. And the distance between the drive electrode trace is 3um.

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

Referring to Table 1, in the above-described preferred embodiment, the noise of the first driving electrode trace 341 on the capacitance of the first receiving electrode 310 is determined by the capacitance of the driving electrode 330 received at the first receiving electrode. Although the touch recognition value is less than 20% within a range in which the touch recognition can be correctly recognized, the first to fourteenth driving electrode traces 341 are fixed while the value between the driving electrode 330 and the first receiving electrode or the second receiving electrode is fixed. Increasing the widths of the first to the second driving electrode trace 341 and the first receiving electrode 310 and the second driving electrode trace 351 and the second receiving electrode when the widths of the first to the second driving electrodes traces 341 to 347 and 351 to 357 are increased to 32 um. As the distance between the first and second driving electrode traces 341 and 351 increases, the noise of the first driving electrode trace 341 and the second driving electrode trace 351 on the capacitance of the first receiving electrode 310 and the second receiving electrode 320 is 29%. This increases the difficulty of correct touch recognition.

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 value between the driving electrode 330 and the first receiving electrode or the second receiving electrode is fixed, the width of the first to fourteenth driving electrode traces 341 to 347 and 351 to 357 is increased to 37 um. The distance between the first driving electrode trace 341 and the first receiving electrode 310 and the distance between the second driving electrode trace 351 and the second receiving electrode 320 become closer to each other, thereby driving the first driving electrode trace 341. And the noise of the second driving electrode trace 351 on the capacitance of the first receiving electrode 310 and the second receiving electrode 320 is increased to 38%, respectively, so that correct touch recognition becomes more difficult.

On the other hand, although the technical spirit of the present invention has been described in detail according to the above embodiment, it should be noted that the above embodiment is for the purpose of explanation and not for the limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

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

Claims (5)

In the single-sided touch sensor comprising a plurality of sensing areas are arranged in two dimensions to form a detection area, the control unit for controlling the 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 arranged to receive the driving signal and be spaced apart from the driving electrode by a predetermined distance;
A driving electrode trace region to which a driving electrode trace connecting the driving electrode and the controller 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;
It is configured to include,
An X-axis direction in one of horizontal and vertical directions of the sensing area with respect to the center of the sensing area;
When a direction perpendicular to the X axis direction is referred to as a Y axis direction,
The first receiving electrode has a predetermined area and is disposed in a second quadrant of the virtual Cartesian coordinate system set to the X and Y axes,
The second receiving electrode has a predetermined area and is disposed in a fourth quadrant of the virtual rectangular coordinate system set to the X and Y axes,
The driving electrode is a predetermined region disposed in the first and third quadrants of the virtual Cartesian coordinate system set to the X-axis and the Y-axis, and a predetermined region disposed in the first quadrant and the third quadrant. It consists of a connection area that connects the area of
The connection region is disposed to be spaced apart from the first receiving electrode and the second receiving electrode at a predetermined interval so that an area overlapping the first receiving electrode and the second receiving electrode does not occur.
The first receiving electrode and the second receiving electrode are arranged to have a symmetrical structure around the driving electrode,
And a predetermined distance (D1 to D4) spaced apart between the driving electrode and the first and second receiving electrodes is in a range between 300 um and 450 um.
delete The method according to claim 1,
The first receiving electrode is disposed to be spaced apart from the driving electrode in the first quadrant by a predetermined distance D1 in the X-axis direction, and the predetermined distance D2 is spaced apart from the driving electrode in the third quadrant in the Y-axis direction. Are placed,
The second receiving electrode is disposed to be spaced apart from the driving electrode in the third quadrant by a predetermined distance D3 in the X-axis direction, and spaced apart from the driving electrode in the first quadrant by a predetermined distance D4 in the Y-axis direction. Are placed,
The first receiving electrode trace is spaced apart from the first receiving electrode at a predetermined interval D5 and wired along the Y axis to the opposite side of the second receiving electrode based on the Y axis,
The second receiving electrode trace is spaced apart from the second receiving electrode at a predetermined interval D6 and wired along the Y axis to the opposite side of the first receiving electrode based on the Y axis,
And a driving electrode trace area to which the driving electrode trace is 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.
delete The method according to claim 3,
The distance D1 to D4 between the driving electrode and the first and second receiving electrodes is
The distance between the receiving electrode and the driving electrode trace set by the distance between the driving electrode trace closest to the first receiving electrode or the second receiving electrode and the first receiving electrode or the second receiving electrode among the driving electrode traces in the driving electrode trace region. (A2); And
A distance A1 between a drive electrode-drive electrode trace set by a distance between a drive electrode trace and a drive electrode closest to a first receive electrode or a second receive electrode among the drive electrode traces in the drive electrode trace region;
Is set to the sum of
The distance A1 between the driving electrode and the driving electrode trace is calculated based on Equation 1 below.
The one drive electrode trace width w is 30um or less,
And a distance between the receiving electrode and the driving electrode trace is set to 100 μm or more.
(Formula 1)
A2 = number of drive electrode traces X (distance between adjacent drive electrode traces + one drive electrode trace width (w))
KR1020150119707A 2015-08-25 2015-08-25 Single plate touch sensor advanced touch sensitivity KR102025283B1 (en)

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US11842020B2 (en) 2021-12-07 2023-12-12 Lx Semicon Co., Ltd. Touch sensing apparatus

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CN109947288B (en) * 2019-02-27 2020-06-30 武汉华星光电半导体显示技术有限公司 Embedded touch panel and manufacturing method thereof

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KR101474350B1 (en) * 2013-10-24 2014-12-18 주식회사 리딩유아이 Touch panel

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US8487898B2 (en) * 2008-04-25 2013-07-16 Apple Inc. Ground guard for capacitive sensing

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KR101474350B1 (en) * 2013-10-24 2014-12-18 주식회사 리딩유아이 Touch panel

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US11842020B2 (en) 2021-12-07 2023-12-12 Lx Semicon Co., Ltd. Touch sensing apparatus

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