CN108469924B

CN108469924B - Touch control device

Info

Publication number: CN108469924B
Application number: CN201710098775.0A
Authority: CN
Inventors: 柯杰斌; 陈志强
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2017-02-23
Filing date: 2017-02-23
Publication date: 2021-04-06
Anticipated expiration: 2037-02-23
Also published as: CN108469924A

Abstract

The invention provides a touch device which comprises a plurality of first sensing electrodes, a plurality of second sensing electrodes and a plurality of third sensing electrodes. The first sensing electrode extends along a first direction. The second sensing electrode is electrically isolated from the first sensing electrode and extends along a second direction. The plurality of third sensing electrodes are electrically isolated from the second sensing electrodes and extend along the first direction. At least part of the first sensing electrode, at least part of the second sensing electrode and at least part of the third sensing electrode are respectively formed on different film layers.

Description

Touch control device

Technical Field

The present disclosure relates to electronic devices, and particularly to a touch device.

Background

The touch device occupies a place no matter the mobile phone, the tablet personal computer or the notebook personal computer. The use of touch devices is also gradually progressing from finger touch to the use of active styluses. Active stylus technologies are numerous and can be classified into electromagnetic and capacitive. The electromagnetic touch pen needs an independent electromagnetic induction plate, and can actively send out signals through electromagnetic induction, so that the electromagnetic touch pen is unique, and the efficiency is excellent for a long time. The capacitive touch pen achieves electric field output by preloading a voltage at the pen point, and calculates the touch position of the pen point above the touch panel through the electric field of the induction terminal receiver. The capacitive stylus has the greatest advantage that an independent sensing board is not needed, and the existing touch panel can sense the finger and the active stylus, so that the capacitive stylus has an advantage in cost. However, since the finger and the active stylus share two sets of sensing electrodes, the performance of the sensing finger and the active stylus is not easily improved.

Disclosure of Invention

The invention provides a touch device with good efficiency.

The touch device of the invention comprises a plurality of first sensing electrodes, a plurality of second sensing electrodes and a plurality of third sensing electrodes. The first sensing electrode extends along a first direction. The second sensing electrode is electrically isolated from the first sensing electrode and extends along a second direction different from the first direction. The plurality of third sensing electrodes are electrically isolated from the second sensing electrodes and extend along the first direction. At least part of the first sensing electrode, at least part of the second sensing electrode and at least part of the third sensing electrode are respectively formed on different film layers.

Based on the above, the touch device according to an embodiment of the invention can improve the efficiency of sensing the finger and/or the stylus by using the first sensing electrode and the third sensing electrode outside the second sensing electrode.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic top view of a touch device according to an embodiment of the invention.

Fig. 2 is a schematic diagram of signals on a first sensing electrode and signals on a second sensing electrode of a touch device according to a comparative example.

FIG. 3 is a diagram illustrating signals on the first sensing electrode, signals on the second sensing electrode, and signals on the third sensing electrode according to an embodiment of the invention.

FIG. 4 is a diagram illustrating signals on the first sensing electrode, signals on the second sensing electrode, and signals on the third sensing electrode according to another embodiment of the invention.

Fig. 5 shows signals on the first sensing electrode and the third sensing electrode of the touch device according to an embodiment of the invention.

Fig. 6 is a schematic cross-sectional view of a touch device according to an embodiment of the invention.

Fig. 7 is a schematic cross-sectional view of a touch device according to another embodiment of the invention.

Fig. 8 is a schematic cross-sectional view of a touch device according to another embodiment of the invention.

Fig. 9 is a schematic cross-sectional view of a touch device according to still another embodiment of the invention.

Fig. 10 is a schematic cross-sectional view of a touch device according to an embodiment of the invention.

Fig. 11 is a schematic cross-sectional view of a touch device according to another embodiment of the invention.

Fig. 12 is a schematic cross-sectional view of a touch device according to another embodiment of the invention.

Fig. 13 is a schematic cross-sectional view of a touch device according to still another embodiment of the invention.

Fig. 14 is a schematic cross-sectional view of a touch device according to an embodiment of the invention.

Fig. 15 is a schematic cross-sectional view of a touch device according to another embodiment of the invention.

Fig. 16 is a schematic cross-sectional view of a touch device according to another embodiment of the invention.

FIG. 17 shows a first sensing electrode and a third sensing electrode corresponding to each other according to another embodiment of the present invention.

FIG. 18 shows a first sensing electrode and a third sensing electrode in accordance with a further embodiment of the present invention.

Fig. 19 shows a first sensing electrode and a third sensing electrode corresponding to each other according to still another embodiment of the present invention.

FIG. 20 shows a first sensing electrode and a third sensing electrode corresponding to each other according to an embodiment of the present invention.

FIG. 21 shows a first sensing electrode and a third sensing electrode corresponding to each other according to another embodiment of the present invention.

Description of reference numerals:

100. 100A to 100J: touch control device

110: first sensing electrode

110 a: opening of the container

112: first wire

120: second sensing electrode

122: second routing

130: third sensing electrode

132: third routing

134: diamond pattern

136: bridge connection line

138: branching part

140: control unit

150: protective element

160. 162, 163, 164, 180: adhesive layer

170: first substrate

172. 174, and (3) a step of: film(s)

190. 191, 192, 193, 194, 195: insulating layer

210: first substrate

220: second substrate

230: display medium

LCM: display module

S_110-1、S_120-1、S_130-1、S_110-2、S_120-2、S_130-2、S_110-3、S_120-3、S_130-3: signal

S1-S10: stacking structure

T: time of frame

T1: first sub-frame time

T2: second sub-frame time

x, y, z: direction of rotation

Detailed Description

Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

Fig. 1 is a schematic top view of a touch device according to an embodiment of the invention. Referring to fig. 1, a touch device 100 includes a plurality of first sensing electrodes 110 extending along a first direction x, a plurality of second sensing electrodes 120 extending along a second direction y, and a plurality of third sensing electrodes 130 extending along the first direction x. The first sensing electrode 110 is electrically isolated from the second sensing electrode 120. The third sensing electrode 130 is electrically isolated from the second sensing electrode 120. At least a portion of the first sensing electrode 110, at least a portion of the second sensing electrode 120, and at least a portion of the third sensing electrode 130 are formed on different film layers, respectively.

Referring to fig. 1, the touch device 100 further includes a control unit 140. The first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130 are electrically connected to the control unit 140. In the present embodiment, the touch device 100 further includes a plurality of first traces 112, a plurality of second traces 122, and a plurality of third traces 132. The first sensing electrode 110 can be electrically connected to the control unit 140 through the first trace 112. The second sensing electrode 120 can be electrically connected to the control unit 140 through the second trace 122. The third sensing electrode 130 can be electrically connected to the control unit 140 through the third trace 132. The control unit 140 is, for example, an Integrated Circuit (IC) having a plurality of pins (pins), but the invention is not limited thereto. In the present embodiment, the first wires 112, the second wires 122 and the third wires 132 can be separated from each other and connected to the pins of the control unit 140 respectively. However, the present invention is not limited thereto, and in another embodiment, each of the third traces 132 and the corresponding one of the first traces 112 may also be connected together before extending to the control unit 140, so that the control unit 140 does not need to increase the number of pins due to the arrangement of the third sensing electrode 130.

The touch device 100 can determine a touch position of a finger of a user according to signals on the first sensing electrode 110 and the second sensing electrode 120. The touch device 100 can also determine the touch position of the stylus according to the signals on the second sensing electrode 120 and the third sensing electrode 130. It is noted that, by disposing the third sensing electrode 130, the performance of the touch device 100 for sensing a finger and/or a stylus can be improved, as illustrated in fig. 1, 2 and 3.

The touch device of the comparative example includes the first sensing electrode 110 and the second sensing electrode 120 of the touch device 100, but does not include the third sensing electrode 130 of the touch device 100. FIG. 2 shows a signal S on the first sensing electrode 110 of the touch device of the comparative example₁₁₀Signal S on the second sensing electrode 120₁₂₀Schematic representation of (a). Referring to fig. 2, the touch device of the comparative example senses a finger and a stylus pen within a frame time T, wherein the stylus pen can send a signal. The frame time T includes a first sub-frame time T1, a second sub-frame time T2 following the first sub-frame time T1, and a third sub-frame time T3 following the second sub-frame time T2. The control unit of the touch device of the comparative example reads the signal S on the first sensing electrode 110 at the first sub-frame time T1 and the second sub-frame time T2 respectively₁₁₀And signal S on second sense electrode 120_120-1To determine the touch position of the stylus. During the third sub-frame time T3, the control unit of the touch device of the comparative example drives a plurality of the first sub-framesA sensing electrode 110 (i.e. control unit input signal S)₁₁₀To the first sensing electrode 110) and read the signal S on the second sensing electrode 120₁₂₀So as to determine the touch position of the finger. In the comparative example, the stylus processing time is, for example, 3.6 microseconds (μ s), the finger processing time is, for example, 3.9 microseconds (μ s), the frame time for completing one sensing of the finger and the stylus is, for example, 7.5 microseconds, and the reporting rate is, for example, 133 hertz (Hz).

FIG. 3 shows a signal S on the first sensing electrode 110 according to an embodiment of the invention_110-1Signal S on the second sensing electrode 120_120-1And signal S on the third sensing electrode 130_130-1Schematic representation of (a). Referring to fig. 1 and 2, the touch device 100 senses a finger and a stylus during a frame time T, wherein the stylus can send a signal. The frame time T includes a first sub-frame time T1 and a second sub-frame time T2 following the first sub-frame time T1. During a first sub-frame time T1, control unit 140 simultaneously reads signal S on second sense electrode 120_120-1And signal S on the third sensing electrode 130_130-1To determine the touch position of the stylus. During a second subframe time T2, control unit 140 drives the plurality of first sensing electrodes 110 (i.e., control unit 140 inputs signal S)_110-1To the first sensing electrode 110) and read the signal S on the second sensing electrode 120_120-1So as to determine the touch position of the finger. It should be noted that, due to the arrangement of the third sensing electrode 130, when the touch device 100 senses the stylus pen, the control unit 140 does not need to read the signals on the two sets of sensing electrodes at different time periods (e.g. the first sub-frame time T1 and the second sub-frame time T2 in fig. 2) respectively, but can read the signal S on the second sensing electrode 120 simultaneously_120-1And signal S on the third sensing electrode 130_130-1. Accordingly, the processing time of the stylus can be shortened, thereby improving the efficiency of the touch device 100 in sensing the finger and/or the stylus. For example, compared to the touch device of the comparative example, in the present embodiment, the processing time of the touch pen can be shortened to 2.3 microseconds (μ s), the frame time for completing one sensing of the finger and the touch pen can be shortened from 7.5 microseconds (μ s) to 6.2 microseconds (μ s), and the report rate (report rate)Generally, the frequency can be increased from 133 hertz (Hz) to 160 Hz, but the invention is not limited thereto.

FIG. 4 shows a signal S on the first sensing electrode 110 according to another embodiment of the present invention_110-2Signal S on the second sensing electrode 120_120-2And signal S on the third sensing electrode 130_130-2Schematic representation of (a). Referring to fig. 1 and 4, the touch device 100 senses a finger and a stylus within a frame time T, wherein the stylus can send a signal. The frame time T includes a first sub-frame time T1 and a second sub-frame time T2 following the first sub-frame time T1. During a first sub-frame time T1, control unit 140 reads signal S on second sense electrode 120_120-2And signal S on the third sensing electrode 130_130-2So as to determine the touch position of the finger. In particular, the control unit 140 drives the first sensing electrode 110 (i.e. the control unit 140 inputs the signal S) during the first sub-frame time T1 and the second sub-frame time T2_110-2To the first sensing electrode 110) and read the signal S on the second sensing electrode 120_120-2So as to determine the touch position of the finger. It should be noted that, due to the arrangement of the third sensing electrode 130, the touch device 100 can perform a part of the sensing of the motion of the stylus pen within the time of sensing the finger. Therefore, the update rate of the report can be shortened, and the efficiency of the touch device 100 for sensing the finger and/or the stylus can be further improved. For example, in the present embodiment, the frame time for completing one sensing of the finger and the stylus can be shortened from 7.5 microseconds (μ s) to 3.9 μ s, and the reporting rate can be increased from 133 hertz (Hz) to 260 Hz, but the invention is not limited thereto.

The third sensing electrode 130 can be used for sensing the orientation of the stylus pen, in addition to sensing the touch position of the third sensing electrode 130 by the third sensing electrode 130. The orientation of the stylus includes a distance between the stylus suspended outside the touch device 100 and the touch surface of the touch device 100, and a tilt degree of the stylus, which includes free movement, rotation, tilt, and the like of the stylus in the orientation of the three-dimensional space. The tilt of the touch pen is an angle between a touch surface of the touch device (e.g., the upper surface of the protection element 150 or the upper surface of the second substrate 220 of the display module LCM described in the following paragraphs) and a length direction of the touch pen. Fig. 5 is a diagram illustrating how the touch device 100 senses a distance between a stylus suspended outside the touch device 100 and a touch surface of the touch device 100 and a tilt of the stylus.

Fig. 5 shows signals on the first sensing electrode and the third sensing electrode of the touch device according to an embodiment of the invention. Referring to fig. 1 and 5, as shown in the second row of fig. 5, when the stylus is suspended outside the touch device 100 (i.e., the stylus does not touch the touch surface), the distance between the stylus and the third sensing electrode 130 is long, the capacitance between the stylus and the third sensing electrode 130 is small, and the signal on the third sensing electrode 130 is small. As shown in the third row of fig. 5, when the stylus touches the touch surface of the touch apparatus 100, the distance between the stylus and the third sensing electrode 130 is close, the capacitance between the stylus and the third sensing electrode 130 is large, and the signal on the third sensing electrode 130 is large. Whether the stylus is suspended outside the touch device 100 can be determined by the magnitude of the signal on the third sensing electrode 130. For example, when the stylus touches the touch surface of the touch control apparatus 100, the signal on the third sensing electrode 130 is a standard signal; if the signal on the third sensing electrode 130 is smaller than the standard signal, it can be determined whether the stylus pen is suspended outside the touch device 100. Furthermore, the difference between the signal on the third sensing electrode 130 and the standard signal can also be used to determine the distance between the stylus suspending outside the touch device 100 and the touch surface of the touch device 100.

In addition, referring to fig. 1 and 5, as shown in the third column of fig. 5, the control unit 140 can simultaneously read the signal on the first sensing electrode 110 (i.e., the signal received by the first sensing electrode 110 and transmitted by the stylus pen) and the signal on the third sensing electrode 130 (i.e., the signal received by the third sensing electrode 130 and transmitted by the stylus pen) to obtain the first signal difference. As shown in the fourth column of fig. 5, at a second time point different from the first time point, the control unit 140 may simultaneously read the signal on the first sensing electrode 110 and the signal on the third sensing electrode 130 to obtain a second signal difference. The control unit 140 compares the first signal difference with the second signal difference to determine the tilt of the stylus. For example, as shown in the third row of FIG. 5, the stylus is tilted to a low degree (e.g., hardly tilted), and the difference between the signal on the first sensing electrode 110 and the signal on the third sensing electrode 130 is the first signal difference. As shown in the fourth column of fig. 5, the difference between the signal on the first sensing electrode 110 and the signal on the third sensing electrode 130 is a second signal difference. If the second signal difference is smaller than the first signal difference, the tilt of the stylus pen can be determined. More specifically, when the second signal difference is smaller than the first signal difference, the smaller the second signal difference, the greater the tilt of the stylus pen.

Fig. 6 is a schematic cross-sectional view of a touch device according to an embodiment of the invention. Referring to fig. 1 and 6, in the present embodiment, the first sensing electrode 110 may be a Transmission electrode (Tx) and the second sensing electrode 120 may be a Reception electrode (Rx). The third sensing electrode 130, the second sensing electrode 120 and the first sensing electrode 110 may be selectively arranged in sequence along a line of sight direction z, wherein the line of sight direction z is perpendicular to an extending direction of the first sensing electrode 110 (i.e., the first direction x) and an extending direction of the second sensing electrode 120 (i.e., the second direction y). However, the present invention is not limited thereto, and the first sensing electrode 110 and the second sensing electrode 120 can sense a finger, and the second sensing electrode 120 and the third sensing electrode 130 can sense a stylus, in other embodiments, the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130 can be arranged in other suitable order.

Referring to fig. 6, in the present embodiment, the touch device 100 may further include a cover lens (cover lens)150, an adhesive layer 160 and a first substrate 170 in addition to the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130. The first substrate 170 is, for example, a glass substrate, but the present invention is not limited thereto. The first sensing electrode 110 and the second sensing electrode 120 may be respectively formed on the upper and lower surfaces of the first substrate 170 to form a stacked structure S1. The third sensing electrode 130 may be formed on the lower surface of the protection element 150 to form a stacked structure S2. The stack structure S1 and the stack structure S2 can be connected together by an adhesive layer 160. In the embodiment, the touch device 100 may further include an adhesive layer 180 and a display module LCM. The stacked structure S1 and the stacked structure S2 can be attached to the display module LCM by the adhesive layer 180, so that the touch device 100 has a display function. In the embodiment, the protection element 150, the third sensing electrode 130, the adhesive layer 160, the second sensing electrode 120, the first substrate 170, the first sensing electrode 110, the adhesive layer 180, and the display module LCM may be sequentially arranged along the viewing direction z.

It should be noted that the manner in which the first sensing electrode 110, the second sensing electrode 120, and the third sensing electrode 130 are disposed in the touch device 100 shown in fig. 6 is only for illustrating the invention and is not meant to limit the invention. In other embodiments, the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130 can be stacked in other manners to form a plurality of different types of touch devices. Such various types of touch devices are also within the intended scope of the present invention. The following description will be given with reference to fig. 7 to 16.

Fig. 7 is a schematic cross-sectional view of a touch device according to another embodiment of the invention. Referring to fig. 7, in the present embodiment, the touch device 100A includes a protection element 150, an adhesive layer 160, an insulating layer 190 and a first substrate 170 in addition to the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130. The first sensing electrode 110 is formed on a lower surface of the first substrate 170. The second sensing electrode 120 is formed on the upper surface of the first substrate 170. An insulating layer 190 is formed on the upper surface of the first substrate 170 to cover the second sensing electrode 120. The third sensing electrode 130 is formed on the insulating layer 190 to be electrically isolated from the second sensing electrode 120. The first sensing electrode 110, the first substrate 170, the second sensing electrode 120, the insulating layer 190 and the third sensing electrode 130 form a stacked structure S9. The stacked structure S9 may be connected to the protection element 150 by an adhesive layer 160. In the embodiment, the touch device 100A may further include an adhesive layer 180 and a display module LCM. The protective element 150, the adhesive layer 160 and the stack structure S9 can be attached to the display module LCM by the adhesive layer 180, so that the touch device 100A has a display function. In the embodiment, the protection element 150, the adhesive layer 160, the third sensing electrode 130, the insulating layer 190, the second sensing electrode 120, the first substrate 170, the first sensing electrode 110, the adhesive layer 180, and the display module LCM may be sequentially arranged along the viewing direction z.

Fig. 8 is a schematic cross-sectional view of a touch device according to another embodiment of the invention. Referring to fig. 8, in the present embodiment, the touch device 100B includes a protection element 150, an insulating layer 191 and an insulating layer 192 in addition to the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130. The third sensing electrode 130 is formed on the lower surface of the protection element 150. The insulating layer 191 covers the third sensing electrode 130. The second sensing electrode 120 is formed on the insulating layer 191. The insulating layer 192 covers the second sensing electrode 120. The first sensing electrode 110 is formed on the insulating layer 192. The protection element 150, the third sensing electrode 130, the insulating layer 191, the second sensing electrode 120, the insulating layer 192, and the first sensing electrode 110 form a stacked structure S4. In the embodiment, the touch device 100B may further include an adhesive layer 180 and a display module LCM. The stacked structure S4 can be attached to the display module LCM by the adhesive layer 180, so that the touch device 100B also has a display function. In the embodiment, the protection element 150, the third sensing electrode 130, the insulating layer 191, the second sensing electrode 120, the insulating layer 192, the first sensing electrode 110, the adhesive layer 180 and the display module LCM may be sequentially arranged along the viewing direction z.

Fig. 9 is a schematic cross-sectional view of a touch device according to still another embodiment of the invention. In the embodiment, the touch device 100C includes a protection element 150, an insulating layer 191, an adhesive layer 162 and a thin Film (Film)172 in addition to the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130. The third sensing electrode 130 is formed on the lower surface of the protection element 150. The insulating layer 191 covers the third sensing electrode 130. The second sensing electrode 120 is formed on the insulating layer 191. The protection element 150, the third sensing electrode 130, the insulating layer 191 and the second sensing electrode 120 form a stacked structure S5. The first sensing electrode 110 is formed on an upper surface of a thin Film (Film) 172. The first sensing electrode 110 and the film 172 form a stacked structure S6. The stacked structure S5 is attached to the stacked structure S6 by the adhesive layer 162. In the embodiment, the touch device 100C may further include an adhesive layer 180 and a display module LCM. The stacked structure S5 and the stacked structure S6 are attached to the display module LCM by the adhesive layer 180, so that the touch device 100C also has a display function. In the embodiment, the protection element 150, the third sensing electrode 130, the insulating layer 191, the second sensing electrode 120, the adhesive layer 162, the first sensing electrode 110, the film 172, the adhesive layer 180, and the display module LCM may be sequentially arranged along the viewing direction z.

Fig. 10 is a schematic cross-sectional view of a touch device according to an embodiment of the invention. In the embodiment, the touch device 100D includes a protection element 150, an adhesive layer 163, a film 172, an adhesive layer 164, and a film 174 in addition to the first sensing electrode 110, the second sensing electrode 120, and the third sensing electrode 130. The third sensing electrode 130 is formed on the upper surface of the film 172. The second sensing electrode 120 is formed on the lower surface of the film 172. The third sensing electrode 130, the film 172 and the second sensing electrode 120 form a stacked structure S7. The stacked structure S7 is attached to the lower surface of the protection device 150 by an adhesive layer 163. The first sensing electrode 110 is formed on an upper surface of another thin Film (Film) 174. The first sensing electrode 110 and the film 174 constitute a stacked structure S8. The stacked structure S7 is attached to the stacked structure S8 by the adhesive layer 164. In the embodiment, the touch device 100D may further include an adhesive layer 180 and a display module LCM. The protection element 150, the stack structure S7, and the stack structure S8 are attached to the display module LCM by the adhesive layer 180, so that the touch device 100D also has a display function. In the embodiment, the protection element 150, the adhesive layer 163, the third sensing electrode 130, the film 172, the second sensing electrode 120, the adhesive layer 164, the first sensing electrode 110, the film 174, the adhesive layer 180, and the display module LCM may be sequentially arranged along the viewing direction z.

Fig. 11 is a schematic cross-sectional view of a touch device according to another embodiment of the invention. In the embodiment, the touch device 100E includes a protection element 150, an adhesive layer 163, an insulating layer 191 and a film 172 in addition to the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130. The first sensing electrode 110 is formed on the lower surface of the film 172. The second sensing electrode 120 is formed on the upper surface of the film 172. The insulating layer 191 covers the second sensing electrode 120. The third sensing electrode 130 is formed on the insulating layer 191. The first sensing electrode 110, the film 172, the second sensing electrode 120, the insulating layer 191, and the third sensing electrode 130 form a stacked structure S9. The stacked structure S9 is attached to the lower surface of the protection device 150 by an adhesive layer 163. In the embodiment, the touch device 100E may further include an adhesive layer 180 and a display module LCM. The protection element 150 and the stacked structure S9 are attached to the display module LCM by the adhesive layer 180, so that the touch device 100E has a display function. In the embodiment, the protection element 150, the adhesive layer 163, the third sensing electrode 130, the insulating layer 191, the second sensing electrode 120, the film 172, the first sensing electrode 110, the adhesive layer 180, and the display module LCM may be sequentially arranged along the viewing direction z.

Fig. 12 is a schematic cross-sectional view of a touch device according to another embodiment of the invention. In the embodiment, the touch device 100F includes a protection element 150, an adhesive layer 163, an insulating layer 191, an insulating layer 192, and a film 172 in addition to the first sensing electrode 110, the second sensing electrode 120, and the third sensing electrode 130. The first sensing electrode 110 is formed on the upper surface of the film 172. The insulating layer 192 covers the first sensing electrode 110. The second sensing electrode 120 is formed on the insulating layer 192. The insulating layer 191 covers the second sensing electrode 120. The third sensing electrode 130 is formed on the insulating layer 191. The film 172, the first sensing electrode 110, the insulating layer 192, the second sensing electrode 120, the insulating layer 191 and the third sensing electrode 130 form a stacked structure S10. The stacked structure S10 is attached to the lower surface of the protection device 150 by an adhesive layer 163. In the embodiment, the touch device 100F may further include an adhesive layer 180 and a display module LCM. The protection element 150 and the stacked structure S10 are attached to the display module LCM by the adhesive layer 180, so that the touch device 100F also has a display function. In the embodiment, the protection element 150, the adhesive layer 163, the third sensing electrode 130, the insulating layer 191, the second sensing electrode 120, the insulating layer 192, the first sensing electrode 110, the film 172, the adhesive layer 180, and the display module LCM may be sequentially arranged along the viewing direction z.

Fig. 13 is a schematic cross-sectional view of a touch device according to still another embodiment of the invention. In the embodiment, the touch device 100G includes a display module LCM, an insulating layer 193, and an insulating layer 194 in addition to the first sensing electrode 110, the second sensing electrode 120, and the third sensing electrode 130. The display module LCM includes a first substrate 210, a second substrate 220 opposite to the first substrate 210, and a display medium 230 disposed between the first substrate 210 and the second substrate 220. The first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130 may be all disposed on the display module LCM. In detail, the first sensing electrode 110 is formed on the upper surface of the second substrate 220, the insulating layer 193 covers the first sensing electrode 110, the second sensing electrode 120 is formed on the insulating layer 193, the insulating layer 194 covers the second sensing electrode 120, and the third sensing electrode 130 is formed on the insulating layer 194. The third sensing electrode 130, the insulating layer 194, the second sensing electrode 120, the insulating layer 193, the first sensing electrode 110, the second substrate 220, the display medium 230, and the first substrate 210 are sequentially stacked along the line-of-sight direction z.

Fig. 14 is a schematic cross-sectional view of a touch device according to an embodiment of the invention. In the embodiment, the touch device 100H further includes a display module LCM and an insulating layer 193 in addition to the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130. The display module LCM includes a first substrate 210, a second substrate 220 opposite to the first substrate 210, and a display medium 230 disposed between the first substrate 210 and the second substrate 220. A portion of the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130 may be disposed in the display module LCM. A portion of the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130 may be disposed outside the display module LCM. For example, in the present embodiment, the first sensing electrode 110 may be disposed in the display module LCM, i.e., between the first substrate 210 and the second substrate 220. In detail, the first sensing electrode 110 may be disposed between the second substrate 220 and the display medium 230 of the display module LCM. The second sensing electrode 120 may be formed on an upper surface of the second substrate 220. The insulating layer 193 covers the second sensing electrode 120. The third sensing electrode 130 is formed on the insulating layer 193. In the present embodiment, the third sensing electrode 130, the insulating layer 193, the second sensing electrode 120, the second substrate 220, the first sensing electrode 110, the display medium 230, and the first substrate 210 may be sequentially stacked along the line-of-sight direction z. However, the invention is not limited thereto, and in other embodiments, the first sensing electrode 110 may also be disposed between the display medium 230 and the first substrate 210, and the third sensing electrode 130, the insulating layer 193, the second sensing electrode 120, the second substrate 220, the display medium 230, the first sensing electrode 110 and the first substrate 210 may be sequentially stacked along the line of sight direction z.

Fig. 15 is a schematic cross-sectional view of a touch device according to another embodiment of the invention. In the embodiment, the touch device 100I further includes a display module LCM in addition to the first sensing electrode 110, the second sensing electrode 120, and the third sensing electrode 130. The display module LCM includes a first substrate 210, a second substrate 220 opposite to the first substrate 210, and a display medium 230 disposed between the first substrate 210 and the second substrate 220. In the embodiment, the first sensing electrode 110 and the second sensing electrode 120 may be disposed in the display module LCM, i.e., between the first substrate 210 and the second substrate 220. The third sensing electrode 130 may be disposed outside the display module LCM. For example, the first sensing electrode 110 may be disposed on the first substrate 210 of the display module LCM and between the display medium 230 and the first substrate 210. The second sensing electrode 120 may be disposed on the second substrate 220 and located between the second substrate 220 and the display medium 230. The third sensing electrode 130 may be disposed on the upper surface of the second substrate 220. In the present embodiment, the third sensing electrode 130, the second substrate 220, the second sensing electrode 120, the display medium 230, the first sensing electrode 110, and the first substrate 210 may be sequentially stacked along the line of sight direction z. However, the present invention is not limited thereto, and in yet another embodiment, the third sensing electrode 130, the second substrate 220, the second sensing electrode 120, the first sensing electrode 110, the display medium 230, and the first substrate 210 may be sequentially stacked along the line-of-sight direction z; in yet another embodiment, the third sensing electrode 130, the second substrate 220, the display medium 230, the second sensing electrode 120, the first sensing electrode 110, and the first substrate 210 may be sequentially stacked along the line of sight direction z.

Fig. 16 is a schematic cross-sectional view of a touch device according to another embodiment of the invention. In the embodiment, the touch device 100J includes a display module LCM and an insulating layer 195 in addition to the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130. The display module LCM includes a first substrate 210, a second substrate 220 opposite to the first substrate 210, and a display medium 230 disposed between the first substrate 210 and the second substrate 220. In the embodiment, the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130 may be all disposed in the display module LCM. For example, the first sensing electrode 110 may be disposed on the first substrate 210 of the display module LCM, the insulating layer 195 covers the first sensing electrode 110, and the second sensing electrode 120 is formed on the insulating layer 195. The second sensing electrode 120, the insulating layer 195 and the first sensing electrode 110 may be located between the display medium 230 and the first substrate 210. The third sensing electrode 130 may be disposed on the second substrate 220 of the display module LCM and between the second substrate 220 and the display medium 230. In the present embodiment, the second substrate 220, the third sensing electrode 130, the display medium 230, the second sensing electrode 120, the insulating layer 195, the first sensing electrode 110 and the first substrate 210 may be sequentially stacked along the line of sight direction z, but the invention is not limited thereto.

Any of the touch devices 100A to 100J can sense the touch position of the finger and the touch position of the stylus by the same sensing method as the touch device 100; in addition, any one of the touch devices 100A to 100J can also be used to sense the inclination degree of the stylus, which is not repeated here.

Referring to fig. 1, in the present embodiment, each of the third sensing electrodes 130 partially overlaps a corresponding one of the first sensing electrodes 110. In other words, each of the third sensing electrodes 130 does not completely shield the corresponding one of the first sensing electrodes 110. Therefore, even if the third sensing electrode 130 is closer to the user than the first sensing electrode 110 and the second sensing electrode 120, the finger sensing amount of the first sensing electrode 110 and the second sensing electrode 120 is not excessively affected by the arrangement of the third sensing electrode 130. In the present embodiment, the third sensing electrode 130 may be located within the first sensing electrode 110. However, the present invention is not limited thereto, and in other embodiments, the third sensing electrode 130 and the first sensing electrode 110 may be configured in other suitable manners, which are described below with reference to fig. 17 to 21.

FIG. 17 shows a first sensing electrode and a third sensing electrode corresponding to each other according to another embodiment of the present invention. In the embodiment of fig. 17, the third sensing electrode 130 may be located beside the first sensing electrode 110, in other words, the third sensing electrode 130 may be staggered and not overlapped with the first sensing electrode 110. FIG. 18 shows a first sensing electrode and a third sensing electrode in accordance with a further embodiment of the present invention. In the embodiment of fig. 18, the third sensing electrode 130 may also partially overlap the first sensing electrode 110 and extend beyond the first sensing electrode 110. Fig. 19 shows a first sensing electrode and a third sensing electrode corresponding to each other according to still another embodiment of the present invention. In the embodiment of fig. 19, the first sensing electrode 110 has an opening 110a, and an orthographic projection of a third sensing electrode 130 corresponding to the first sensing electrode 110 on the surface of the first sensing electrode 110 can be located within the opening 110 a. FIG. 20 shows a first sensing electrode and a third sensing electrode corresponding to each other according to an embodiment of the present invention. In the embodiment of fig. 20, the first sensing electrode 110 has a plurality of openings 110a, one third sensing electrode 130 corresponding to the first sensing electrode 110 may have a plurality of branches 138, and orthographic projections of the plurality of branches 138 on the surface of the first sensing electrode 110 may be respectively located within the plurality of openings 110 a.

In addition, in the embodiment of fig. 17 to 20, the shape of the third sensing electrode 130 is exemplified by a stripe, and the shape of the first sensing electrode 110 is exemplified by one stripe pattern or a plurality of stripe patterns connected to each other. However, the invention is not limited thereto, and in other embodiments, the third sensing electrode 130 and the first sensing electrode 110 may have other suitable shapes, which is described below with reference to fig. 21 as an example. FIG. 21 shows a first sensing electrode and a third sensing electrode corresponding to each other according to another embodiment of the present invention. In the embodiment of fig. 21, the third sensing electrode 130 may include a plurality of diamond patterns 134 and a plurality of bridge lines 136, wherein each bridge line 136 connects two adjacent diamond patterns 134, and the opening 110a of the first sensing electrode 110 may have a saw-toothed edge corresponding to the plurality of diamond patterns 134. The first sensing electrode 110 and the third sensing electrode 130 of any one of fig. 17 to 21 can be applied to any one of the

touch devices

100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I, or 100J.

In summary, the touch device of the embodiment of the invention includes a plurality of first sensing electrodes extending along the first direction, a plurality of second sensing electrodes extending along the second direction, and a plurality of third sensing electrodes extending along the first direction and electrically isolated from the second sensing electrodes. By using the third sensing electrode outside the first sensing electrode and the second sensing electrode, the efficiency of the touch device for sensing the finger and/or the touch pen can be improved.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A touch device, comprising:

a plurality of first sensing electrodes extending along a first direction;

a plurality of second sensing electrodes electrically isolated from the plurality of first sensing electrodes and extending along a second direction different from the first direction;

a plurality of third sensing electrodes electrically isolated from the plurality of second sensing electrodes and extending along the first direction, wherein the plurality of first sensing electrodes, the plurality of second sensing electrodes and the plurality of third sensing electrodes are respectively formed on a plurality of different films; and

the control unit is electrically connected with the first sensing electrodes, the second sensing electrodes and the third sensing electrodes, and determines the touch position of a finger according to signals on the first sensing electrodes and the second sensing electrodes and determines the touch position of a stylus according to signals on the second sensing electrodes and the third sensing electrodes.

2. The touch device of claim 1,

in a first subframe time, the control unit reads signals on the plurality of second sensing electrodes and the plurality of third sensing electrodes simultaneously to determine a touch position of the stylus;

in a second sub-frame time following the first sub-frame time, the control unit drives the plurality of first sensing electrodes and reads signals on the plurality of second sensing electrodes to determine a touch position of a finger.

3. The touch device of claim 1,

in a first sub-frame time, the control unit reads signals on the second sensing electrodes and signals on the third sensing units respectively, and determines a touch position of the stylus according to the signals on the second sensing electrodes and the signals on the third sensing electrodes read in the second sub-frame time;

in the first sub-frame time and the second sub-frame time following the first sub-frame time, the control unit drives the plurality of first sensing electrodes and reads signals on the plurality of second sensing electrodes to determine a touch position of a finger.

4. The touch device of claim 1,

the control unit reads signals on the plurality of first sensing electrodes and signals on the plurality of third sensing electrodes simultaneously to obtain a first signal difference at a first time point;

the control unit simultaneously reads signals on the plurality of first sensing electrodes and signals on the plurality of third sensing electrodes to obtain second signal differences at a second time point different from the first time point;

the control unit compares the first signal difference with the second signal difference to determine the orientation of the stylus.

5. The touch device of claim 1, wherein the third plurality of sense electrodes, the second plurality of sense electrodes, and the first plurality of sense electrodes are sequentially arranged along a line of sight direction perpendicular to the first direction and the second direction.

6. The touch device of claim 1, further comprising:

a protective element;

an adhesive layer; and

a first substrate, wherein the protection element, the plurality of third sensing electrodes, the adhesive layer, the plurality of second sensing electrodes, the first substrate, and the plurality of first sensing electrodes are sequentially arranged along a line-of-sight direction.

7. The touch device of claim 1, further comprising:

a protective element;

an adhesive layer;

an insulating layer; and

a first substrate, wherein the protective element, the adhesive layer, the plurality of third sensing electrodes, the insulating layer, the plurality of second sensing electrodes, the first substrate, and the plurality of first sensing electrodes are sequentially stacked along a line-of-sight direction.

8. The touch device of claim 1, further comprising:

a protective element; and

an insulating layer, wherein the protection element, the plurality of third sensing electrodes, the insulating layer, the plurality of second sensing electrodes, and the plurality of first sensing electrodes are sequentially stacked along a line-of-sight direction.

9. The touch device of claim 1, further comprising:

a protective element;

an insulating layer;

an adhesive layer; and

a thin film, wherein the protective element, the plurality of third sensing electrodes, the insulating layer, the plurality of second sensing electrodes, the adhesive layer, the plurality of first sensing electrodes, and the thin film are sequentially stacked along a line-of-sight direction.

10. The touch device of claim 1, further comprising:

a protective element;

a first adhesive layer;

a first film;

a second adhesive layer; and

a second film, wherein the protective element, the first adhesive layer, the plurality of third sensing electrodes, the first film, the plurality of second sensing electrodes, the second adhesive layer, the plurality of first sensing electrodes, and the second film are sequentially stacked along a line-of-sight direction.

11. The touch device of claim 1, further comprising:

a protective element;

an adhesive layer;

an insulating layer; and

a thin film, wherein the protective element, the adhesive layer, the plurality of third sensing electrodes, the insulating layer, the plurality of second sensing electrodes, the thin film, and the plurality of first sensing electrodes are sequentially stacked along a line-of-sight direction.

12. The touch device of claim 1, further comprising:

a protective element;

an adhesive layer; and

a film, wherein the protective element, the adhesive layer, the plurality of third sensing electrodes, the plurality of second sensing electrodes, the plurality of first sensing electrodes, and the film are sequentially stacked along a line-of-sight direction.

13. The touch device of claim 1, further comprising:

a first substrate;

a second substrate opposite to the first substrate; and

a display medium disposed between the first substrate and the second substrate, wherein the plurality of third sensing electrodes, the plurality of second sensing electrodes, the plurality of first sensing electrodes, the second substrate, the display medium, and the first substrate are sequentially stacked along a line of sight direction.

14. The touch device of claim 1, further comprising:

a first substrate;

a second substrate opposite to the first substrate; and

a display medium disposed between the first substrate and the second substrate, wherein the plurality of third sensing electrodes, the plurality of second sensing electrodes, the second substrate, the display medium, and the first substrate are sequentially stacked along a line of sight direction, and the first sensing electrode is located between the first substrate and the second substrate.

15. The touch device of claim 1, further comprising:

a first substrate;

a second substrate opposite to the first substrate; and

a display medium disposed between the first substrate and the second substrate, wherein the plurality of third sensing electrodes, the second substrate, the plurality of second sensing electrodes, the plurality of first sensing electrodes, and the first substrate are sequentially stacked along a line of sight direction.

16. The touch device of claim 1, further comprising:

a first substrate;

a second substrate opposite to the first substrate; and

a display medium disposed between the first substrate and the second substrate, wherein the second substrate, the display medium, and the first substrate are sequentially stacked along a line of sight direction, and the plurality of first sensing electrodes, the plurality of second sensing electrodes, and the plurality of third sensing electrodes are located between the first substrate and the second substrate.

17. The touch device of claim 1, wherein each of the third sensing electrodes partially overlaps a corresponding one of the first sensing electrodes.

18. The touch device of claim 1, wherein each of the third sensing electrodes is staggered from and does not overlap a corresponding one of the first sensing electrodes.