CN108469924A - Touch control device - Google Patents

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 device

technical field

The invention relates to an electronic device, in particular to a touch device.

Background technique

Whether it's a phone, tablet or laptop, touch devices have their place. The use of touch devices has also gradually advanced from finger touch to the use of active stylus. There are many technologies of active stylus, which can be mainly divided into electromagnetic type and capacitive type. The electromagnetic stylus requires an independent electromagnetic induction board, and the stylus is unique in that it can actively send signals through electromagnetic induction, and its performance has been excellent for a long time. The capacitive stylus achieves electric field output by preloading a voltage on the pen tip, and calculates the touch position of the pen tip above the touch panel through the electric field receiver at the sensing end. The biggest advantage of the capacitive stylus is that it does not need a separate sensor board, and the existing touch panel can sense the finger and the active stylus, so it has an advantage in cost. However, since the finger and the active stylus share two sets of sensing electrodes, the performance of sensing the finger and the active stylus is not easy to improve.

Contents of the invention

The invention provides a touch device with good performance.

The touch device of the present invention includes a plurality of first sensing electrodes, a plurality of second sensing electrodes and a plurality of third sensing electrodes. The first sensing electrodes extend along the 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 electrodes, at least part of the second sensing electrodes and at least part of the third sensing electrodes are respectively formed in different film layers.

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

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

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

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

3 is a schematic diagram of 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 present invention.

4 is a schematic diagram of 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 present 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 present invention.

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

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

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

FIG. 9 is a schematic cross-sectional view of a touch device according to yet another embodiment of the present invention.

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

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

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

FIG. 13 is a schematic cross-sectional view of a touch device according to yet another embodiment of the present invention.

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

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

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

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

FIG. 18 shows a corresponding first sensing electrode and a third sensing electrode according to another embodiment of the present invention.

FIG. 19 shows a corresponding first sensing electrode and a third sensing electrode according to yet another embodiment of the present invention.

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

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

Explanation of reference signs:

100, 100A～100J: touch device

110: first sensing electrode

110a: opening

112: The first line

120: second sensing electrode

122: Second trace

130: the third sensing electrode

132: The third trace

134: Diamond pattern

136: bridge line

138: Branch Department

140: Control unit

150: Protection element

160, 162, 163, 164, 180: Adhesive layer

170: first substrate

172, 174: film

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

210: first substrate

220: second substrate

230: display media

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: stack structure

T: frame time

T1: Time of the first subframe

T2: second subframe time

x, y, z: direction

Detailed ways

Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used in the drawings and 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 present invention. Please refer to FIG. 1 , the 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 second sensing electrodes 120 extending along a first direction x. a plurality of extended third sensing electrodes 130 . 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 part of the first sensing electrodes 110 , at least a part of the second sensing electrodes 120 and at least a part of the third sensing electrodes 130 are respectively formed in different layers.

Please refer 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 this embodiment, the touch device 100 further includes a plurality of first wires 112 , a plurality of second wires 122 and a plurality of third wires 132 . The first sensing electrode 110 can be electrically connected to the control unit 140 through the first wiring 112 . The second sensing electrode 120 can be electrically connected to the control unit 140 through the second wiring 122 . The third sensing electrode 130 can be electrically connected to the control unit 140 through the third wiring 132 . The control unit 140 is, for example, an integrated circuit (IC) having a plurality of pins, but the present invention is not limited thereto. In this embodiment, the plurality of first traces 112 , the plurality of second traces 122 and the plurality of third traces 132 may be separated from each other and each connected to a plurality of pins of the control unit 140 . However, the present invention is not limited thereto. In another embodiment, each third wire 132 and a corresponding first wire 112 may also be connected together before extending to the control unit 140, so that the control unit 140 does not The number of pins needs to be increased due to the arrangement of the third sensing electrodes 130 .

The touch device 100 can determine the touch position of the user's finger according to the 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 worth noting that, through the arrangement of the third sensing electrode 130 , the performance of the touch device 100 in sensing the finger and/or the stylus can be improved, which will be illustrated below using FIG. 1 , FIG. 2 and FIG. 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 . 2 is a schematic diagram of the signal S ₁₁₀ on the first sensing electrode 110 and the signal S 120 on the second sensing electrode ₁₂₀ of the touch device of the comparative example. Please refer to FIG. 2 , the touch device of the comparative example senses the finger and the stylus within the frame time T, wherein the stylus 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 ₁₁₀ on the first sensing electrode 110 and the signal S on the second sensing electrode 120 at the first sub-frame time T1 and the second sub-frame time T2 respectively. _120-1 to 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 first sensing electrodes 110 (that is, the control unit inputs a signal S ₁₁₀ to the first sensing electrodes 110) and reads the second sensing electrode 110. The signal S ₁₂₀ on the electrode 120 is detected to determine the touch position of the finger. In the comparative example, the processing time of the stylus is, for example, 3.6 microseconds (μs), the processing time of the finger is, for example, 3.9 microseconds (μs), and the frame time for one sensing of the finger and the stylus is, for example, 7.5 microseconds , The report rate is, for example, 133 hertz (Hz).

3 shows the signal S _110-1 on the first sensing electrode 110, the signal S 120-1 on the second sensing electrode 120, and the signal S _130-1 on the third sensing electrode ₁₃₀ according to an embodiment of the present invention. schematic diagram. Referring to FIG. 1 and FIG. 2 , the touch device 100 senses the finger and the stylus within the 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 the first sub-frame time T1, the control unit 140 simultaneously reads the signal S _120-1 on the second sensing electrode 120 and the signal S 130-1 on the third sensing electrode ₁₃₀ to determine the stylus Touch location. During the second sub-frame time T2, the control unit 140 drives a plurality of first sensing electrodes 110 (that is, the control unit 140 inputs the signal S _110-1 to the first sensing electrodes 110) and reads the second sensing electrodes 120 The signal S _{120 - 1} on the signal to determine the touch position of the finger. It is worth mentioning that, due to the arrangement of the third sensing electrode 130, when the touch device 100 senses the stylus, the control unit 140 does not need to operate at different time intervals (such as the first sub-frame time T1 and The second sub-frame time T2) respectively reads the signals on the two groups of sensing electrodes, and simultaneously reads the signal S120-1 on the second sensing electrode ₁₂₀ and the signal S130 on the third sensing electrode _{130 -1} . Thereby, the processing time of the stylus can be shortened, thereby improving the performance of the touch device 100 in sensing the finger and/or the stylus. For example, compared with the touch device of the comparative example, in this embodiment, the processing time of the stylus can be shortened to 2.3 microseconds (μs), and the frame time to complete one sensing of the finger and the stylus can be reduced from 7.5 The microsecond (μs) is shortened to 6.2 microseconds, and the report rate can be increased from 133 Hz to 160 Hz, but the present invention is not limited thereto.

4 shows the signal S ₁₁₀ - 2 on the first sensing electrode 110 , the signal S 120 - 2 on the second sensing electrode 120 and the signal S ₁₃₀ - on the third sensing electrode ₁₃₀ according to another embodiment of the present invention. ₂ schematic. Referring to FIG. 1 and FIG. 4 , the touch device 100 senses the finger and the stylus within the 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 the first sub-frame time T1, the control unit 140 reads the signal S _120-2 on the second sensing electrode 120 and the signal S 130-2 on the third sensing electrode ₁₃₀ to determine the touch position of the finger . In particular, during the first sub-frame time T1 and the second sub-frame time T2, the control unit 140 drives the first sensing electrode 110 (that is, the control unit 140 inputs the signal S _110-2 to the first sensing electrode 110) And read the signal S _120-2 on the second sensing electrode 120 to determine the touch position of the finger. It is worth mentioning that due to the arrangement of the third sensing electrode 130 , the touch device 100 can partially sense the action of the stylus during the time of sensing the finger. In this way, the report update rate can be shortened, thereby improving the performance of the touch device 100 in sensing fingers and/or stylus. For example, in this embodiment, the time to complete a frame for sensing the finger and the stylus can be shortened from 7.5 microseconds (μs) to 3.9 microseconds, and the report rate can be roughly reduced from 133 Hz (Hz) is raised to 260 Hz, but the present invention is not limited thereto.

In addition to sensing the touch position of the third sensing electrode 130 , the third sensing electrode 130 can also be used to sense the orientation of the stylus. The orientation of the stylus includes the distance between the stylus suspended outside the touch device 100 and the touch surface of the touch device 100 and the inclination of the stylus, such as the free movement of the stylus in the orientation in the three-dimensional space, Rotation, tilting, etc. can be included. The inclination of the stylus refers to the length of the touch surface of the touch device (for example: 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 the stylus. The size of the angle between the directions. The following uses FIG. 5 to illustrate how the touch device 100 senses the distance between the stylus suspended outside the touch device 100 and the touch surface of the touch device 100 and the inclination 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 present invention. Please refer to FIG. 1 and FIG. 5. As shown in the second row of FIG. 5, when the stylus is suspended outside the touch device 100 (that is, the stylus does not touch the touch surface), the stylus and the third sense The distance between the sensing electrodes 130 is long, the capacitance between the stylus and the third sensing electrodes 130 is small, and the signal on the third sensing electrodes 130 is small. As shown in the third row of FIG. 5 , when the stylus touches the touch surface of the touch device 100 , the distance between the stylus and the third sensing electrode 130 is short, and the distance between the stylus and the third sensing electrode 130 is short. The capacitance between them 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 device 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, Then it can be determined whether the stylus is suspended outside the touch device 100 . Furthermore, the distance between the stylus suspended outside the touch device 100 and the touch surface of the touch device 100 can be determined by the difference between the signal on the third sensing electrode 130 and the standard signal.

In addition, please refer to FIG. 1 and FIG. 5, as shown in the third column of FIG. The signal emitted by the stylus) and the signal on the third sensing electrode 130 (that is, the signal emitted by the stylus pen received by the third sensing electrode 130 ) to obtain a 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 can simultaneously read the signal on the first sensing electrode 110 and the signal on the third sensing electrode 130 , to obtain the second signal difference. The control unit 140 compares the first signal difference and the second signal difference to determine the inclination of the stylus. For example, as shown in the third column of FIG. 5 , the stylus has a low degree of inclination (for example: almost no inclination), at this time, the signal signal on the first sensing electrode 110 and the signal signal on the third sensing electrode 130 The difference in signals is a 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 the second signal difference. If the second signal difference is smaller than the first signal difference, the inclination of the stylus can be determined. Furthermore, when the second signal difference is smaller than the first signal difference, the smaller the second signal difference, the greater the inclination of the stylus.

FIG. 6 is a schematic cross-sectional view of a touch device according to an embodiment of the present invention. Referring to FIG. 1 and FIG. 6 , in this embodiment, the first sensing electrode 110 may be a transmitting electrode (Transmission; Tx), and the second sensing electrode 120 may be a receiving electrode (Reception; Rx). The third sensing electrode 130, the second sensing electrode 120, and the first sensing electrode 110 can be selectively arranged in sequence along the line of sight direction z, wherein the line of sight direction z is the same as the extending direction of the first sensing electrode 110 (ie, the first The direction x) is perpendicular to the extending direction of the second sensing electrodes 120 (ie, the second direction y). However, the present invention is not limited thereto, where 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 In the embodiment, the first sensing electrodes 110 , the second sensing electrodes 120 and the third sensing electrodes 130 may also be arranged in other proper order.

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

It should be noted that the manner in which the first sensing electrodes 110, the second sensing electrodes 120 and the third sensing electrodes 130 are arranged in the touch device 100 shown in FIG. to limit the invention. In other embodiments, the first sensing electrodes 110 , the second sensing electrodes 120 and the third sensing electrodes 130 can also be stacked in other ways to form various types of touch devices. The various types of touch devices are also within the protection scope of the present invention. The following will illustrate with examples in conjunction with FIGS. 7 to 16 .

FIG. 7 is a schematic cross-sectional view of a touch device according to another embodiment of the present invention. Please refer to FIG. 7 , in this embodiment, in addition to the first sensing electrode 110 , the second sensing electrode 120 and the third sensing electrode 130 , the touch device 100A also includes a protection element 150 , an adhesive layer 160 , an insulating layer 190 and the first substrate 170 . The first sensing electrodes 110 are formed on the lower surface of the first substrate 170 . The second sensing electrodes 120 are 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 electrodes 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 stack structure S9 . The stacked structure S9 can be connected to the protection element 150 by using the adhesive layer 160 . In this embodiment, the touch device 100A may further include an adhesive layer 180 and a display module LCM. The protection element 150 , the adhesive layer 160 and the stacked structure S9 can be pasted on the display module LCM by using the adhesive layer 180 , so that the touch device 100A also has a display function. In this 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 The LCMs may be arranged sequentially along the line of sight direction z.

FIG. 8 is a schematic cross-sectional view of a touch device according to another embodiment of the present invention. Please refer to FIG. 8. In this embodiment, in addition to the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130, the touch device 100B also includes a protection element 150, an insulating layer 191 and an insulating layer. Layer 192. The third sensing electrode 130 is formed on the lower surface of the protection member 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 stack structure S4. In this embodiment, the touch device 100B may further include an adhesive layer 180 and a display module LCM. The stack structure S4 can be attached to the display module LCM by using the adhesive layer 180 , so that the touch device 100B also has a display function. In this 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 can be along the line of sight The directions z are arranged sequentially.

FIG. 9 is a schematic cross-sectional view of a touch device according to yet another embodiment of the present invention. In this embodiment, besides the first sensing electrode 110, the second sensing electrode 120 and the third sensing electrode 130, the touch device 100C also includes a protection element 150, an insulating layer 191, an adhesive layer 162 and a film ( Film) 172. The third sensing electrode 130 is formed on the lower surface of the protection member 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 stack structure S5 . The first sensing electrode 110 is formed on the upper surface of the film (Film) 172 . The first sensing electrode 110 and the thin film 172 form a stack structure S6. The stack structure S5 is attached to the stack structure S6 by using the adhesive layer 162 . In this embodiment, the touch device 100C may further include an adhesive layer 180 and a display module LCM. The stack structure S5 and the stack structure S6 are attached to the display module LCM by using the adhesive layer 180 , so that the touch device 100C also has a display function. In this 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 can be Arranged sequentially along the line of sight direction z.

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

FIG. 11 is a schematic cross-sectional view of a touch device according to another embodiment of the present invention. In this embodiment, besides the first sensing electrode 110 , the second sensing electrode 120 and the third sensing electrode 130 , the touch device 100E also includes a protection element 150 , an adhesive layer 163 , an insulating layer 191 and a film 172 . The first sensing electrodes 110 are 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 thin film 172 , the second sensing electrode 120 , the insulating layer 191 and the third sensing electrode 130 form a stack structure S9 . The stacked structure S9 is attached to the lower surface of the protection element 150 by using the adhesive layer 163 . In this embodiment, the touch device 100E may further include an adhesive layer 180 and a display module LCM. The protection element 150 and the stack structure S9 are pasted on the display module LCM by using the adhesive layer 180 , so that the touch device 100E also has a display function. In this 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 can be Arranged sequentially along the line of sight direction z.

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

FIG. 13 is a schematic cross-sectional view of a touch device according to yet another embodiment of the present invention. In this embodiment, besides the first sensing electrode 110 , the second sensing electrode 120 and the third sensing electrode 130 , the touch device 100G further includes a display module LCM, an insulating layer 193 and an insulating layer 194 . 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 all be disposed on the display module LCM. Specifically, 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, and the insulating layer 194 covers the second sensing electrode 110. The sensing electrode 120 and the third sensing electrode 130 are 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 stacked in sequence along the viewing direction z .

FIG. 14 is a schematic cross-sectional view of a touch device according to an embodiment of the present invention. In this embodiment, besides the first sensing electrode 110 , the second sensing electrode 120 and the third sensing electrode 130 , the touch device 100H further includes a display module LCM and an insulating layer 193 . 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 part 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 part 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 this embodiment, the first sensing electrodes 110 can be disposed in the display module LCM, that is, between the first substrate 210 and the second substrate 220 . In detail, the first sensing electrodes 110 may be disposed between the second substrate 220 of the display module LCM and the display medium 230 . 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 this 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 can be arranged along the viewing direction z Stacked sequentially. However, the present invention is not limited thereto. 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 The two sensing electrodes 120 , the second substrate 220 , the display medium 230 , the first sensing electrodes 110 and the first substrate 210 can be stacked sequentially along the viewing direction z.

FIG. 15 is a schematic cross-sectional view of a touch device according to another embodiment of the present invention. In this embodiment, besides the first sensing electrode 110 , the second sensing electrode 120 and the third sensing electrode 130 , the touch device 100I also includes a display module LCM. 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 this embodiment, the first sensing electrodes 110 and the second sensing electrodes 120 may be disposed in the display module LCM, that is, 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 electrodes 110 may be disposed on the first substrate 210 of the display module LCM, and located between the display medium 230 and the first substrate 210 . The second sensing electrodes 120 can be disposed on the second substrate 220 and located between the second substrate 220 and the display medium 230 . The third sensing electrodes 130 may be disposed on the upper surface of the second substrate 220 . In this 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 can be stacked sequentially along the viewing direction z. However, the present invention is not limited thereto. 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 z; Can be stacked sequentially 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 present invention. In this embodiment, besides the first sensing electrode 110 , the second sensing electrode 120 and the third sensing electrode 130 , the touch device 100J also includes a display module LCM and an insulating layer 195 . 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 this embodiment, the first sensing electrode 110 , the second sensing electrode 120 and the third sensing electrode 130 may all be disposed in the display module LCM. For example, the first sensing electrodes 110 may be disposed on the first substrate 210 of the display module LCM, the insulating layer 195 covers the first sensing electrodes 110 , and the second sensing electrodes 120 are 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 located between the second substrate 220 and the display medium 230 . In this 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 can be arranged along the line of sight direction z Stacked sequentially, but the present invention is not limited thereto.

Any of the above-mentioned touch devices 100A-100J can sense the touch position of the finger and the touch position of the stylus using the same sensing method as the touch-control device 100; Either of them can also be used to sense the inclination of the stylus, which will not be repeated here.

Referring to FIG. 1 , in this embodiment, each third sensing electrode 130 partially overlaps with a corresponding first sensing electrode 110 . In other words, each third sensing electrode 130 will not completely cover the corresponding one of the first sensing electrodes 110 . Thus, 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 arrangement of the third sensing electrode 130 will not excessively affect the first sensing electrode 110 and the second sensing electrode 120. The finger sensing value of the second sensing electrode 120 . In this embodiment, the third sensing electrode 130 may be located inside the first sensing electrode 110 . However, the present invention is not limited thereto. In other embodiments, the third sensing electrodes 130 and the first sensing electrodes 110 may also be configured in other appropriate ways. The following uses FIGS. 17 to 21 as examples for illustration.

FIG. 17 shows a corresponding first sensing electrode and a third sensing electrode 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 corresponding first sensing electrode and a third sensing electrode according to another 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 exceed the first sensing electrode 110 . FIG. 19 shows a corresponding first sensing electrode and a third sensing electrode according to yet another embodiment of the present invention. In the embodiment of FIG. 19, the first sensing electrode 110 has an opening 110a, and the orthographic projection of a third sensing electrode 130 corresponding to the first sensing electrode 110 on the surface where the first sensing electrode 110 is located may be Located within the opening 110a. FIG. 20 shows a corresponding first sensing electrode and a third sensing electrode 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, and one third sensing electrode 130 corresponding to the first sensing electrode 110 may have a plurality of branch portions 138, and the plurality of branch portions 138 are in the The orthographic projections on the surface where the first sensing electrodes 110 are located may be respectively located in the plurality of openings 110a.

In addition, in the embodiments shown in FIGS. 17 to 20 , the shape of the third sensing electrodes 130 is strips as an example, and the shape of the first sensing electrodes 110 is a strip pattern or a plurality of strips connected to each other. pattern as an example. However, the present invention is not limited thereto. In other embodiments, the third sensing electrodes 130 and the first sensing electrodes 110 may also have other appropriate shapes, and FIG. 21 is taken as an example for illustration below. FIG. 21 shows a corresponding first sensing electrode and a third sensing electrode according to another embodiment of the present invention. In the embodiment of FIG. 21, the third sensing electrode 130 may include a plurality of rhombus patterns 134 and a plurality of bridge lines 136, wherein each bridge line 136 connects two adjacent rhombus patterns 134, and the first sensing electrode The opening 110 a of 110 may have serrated edges corresponding to the plurality of diamond patterns 134 . The first sensing electrode 110 and the third sensing electrode 130 of any one of FIGS. 17 to 21 can be applied to any of the aforementioned touch devices 100 , 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I or 100J.

In summary, the touch device according to an embodiment of the present 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 sensing electrodes extending along the first direction. A plurality of third sensing electrodes extending and electrically isolated from the second sensing electrodes. By using the third sensing electrode other than the first sensing electrode and the second sensing electrode, the performance of the touch device for sensing the finger and/or the stylus can be improved.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall prevail as defined by the claims.

Claims (19)

1. A touch device, characterized in that, 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; and 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 The electrodes and the plurality of third sensing electrodes are respectively formed in different multiple film layers. 2. The touch device according to claim 1, further comprising: a control unit electrically connected to the plurality of first sensing electrodes, the plurality of second sensing electrodes, and the plurality of third sensing electrodes, wherein the control unit The signals on the detection electrode and the plurality of second sensing electrodes determine the touch position of the finger, and the signals on the plurality of second sensing electrodes and the plurality of third sensing electrodes determine the touch pen the touch position. 3. The touch device according to claim 1, further comprising: A control unit electrically connected to the plurality of first sensing electrodes, the plurality of second sensing electrodes, and the plurality of third sensing electrodes, wherein, During the first sub-frame time, the control unit simultaneously reads the signals on the plurality of second sensing electrodes and the plurality of third sensing electrodes to determine the touch position of the stylus; During 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, so as to Determines where the finger touches. 4. The touch device according to claim 1, further comprising: A control unit electrically connected to the plurality of first sensing electrodes, the plurality of second sensing electrodes, and the plurality of third sensing electrodes, wherein, Within the first subframe time, the control unit reads the signals on the plurality of second sensing electrodes and the signals on the plurality of third sensing units respectively, and according to the The signals on the plurality of second sensing electrodes and the signals on the plurality of third sensing electrodes read within the frame time determine the touch position of the stylus; During 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 the plurality of first sensing electrodes. The second senses the signal on the electrode to determine the touch position of the finger. 5. The touch device according to claim 1, further comprising: A control unit electrically connected to the plurality of first sensing electrodes, the plurality of second sensing electrodes, and the plurality of third sensing electrodes, wherein, The control unit simultaneously reads signals on the plurality of first sensing electrodes and signals on the plurality of third sensing electrodes to obtain a first signal difference; The control unit simultaneously reads signals on the plurality of first sensing electrodes and signals on the plurality of third sensing electrodes to obtain a second signal difference; The control unit compares the first signal difference with the second signal difference to determine the orientation of the stylus. 6. The touch device according to claim 1, wherein the plurality of third sensing electrodes, the plurality of second sensing electrodes and the plurality of first sensing electrodes are aligned with the first direction and the line-of-sight direction perpendicular to the second direction are arranged in sequence. 7. The touch device according to claim 1, further comprising: protection element; 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 Arranged sequentially along the line of sight. 8. The touch device according to claim 1, further comprising: protection element; Adhesive layer; insulation; and The 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 The first sensing electrodes are stacked sequentially along the viewing direction. 9. The touch device according to claim 1, further comprising: protective elements; and an insulating layer, wherein the protective element, the plurality of third sensing electrodes, the insulating layer, the plurality of second sensing electrodes, and the plurality of first sensing electrodes are stacked sequentially along the line of sight direction . 10. The touch device according to claim 1, further comprising: protection element; Insulation; adhesive layer; and 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 The films are stacked sequentially along the line of sight. 11. The touch device according to claim 1, further comprising: protection element; first adhesive layer; first film; a second adhesive layer; and The second film, wherein the protection 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 stacked sequentially along the viewing direction. 12. The touch device according to claim 1, further comprising: protection element; Adhesive layer; insulation; and film, wherein the protection element, the adhesive layer, the plurality of third sensing electrodes, the insulating layer, the plurality of second sensing electrodes, the film, and the plurality of first sensing electrodes The electrodes are stacked sequentially along the line of sight. 13. The touch device according to claim 1, further comprising: protection element; 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 along the line of sight Stacked sequentially. 14. The touch device according to claim 1, further comprising: first substrate; a second substrate, relative 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 the viewing direction. 15. The touch device according to claim 1, further comprising: first substrate; a second substrate, relative to the first substrate; and A display medium, configured between the first substrate and the second substrate, wherein the plurality of third sensing electrodes, the plurality of second sensing electrodes, the second substrate, and the display medium And the first substrates are stacked sequentially along the viewing direction, and the first sensing electrodes are located between the first substrate and the second substrate. 16. The touch device according to claim 1, further comprising: first substrate; a second substrate, relative to the first substrate; and a display medium, configured 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 The first sensing electrodes and the first substrate are sequentially stacked along the viewing direction. 17. The touch device according to claim 1, further comprising: first substrate; a second substrate, relative to the first substrate; and The display medium is disposed between the first substrate and the second substrate, wherein the second substrate, the display medium, and the first substrate are stacked sequentially along the viewing direction, and the plurality of first A sensing electrode, the plurality of second sensing electrodes and the plurality of third sensing electrodes are located between the first substrate and the second substrate. 18. The touch device according to claim 1, wherein each of the third sensing electrodes partially overlaps with a corresponding first sensing electrode. 19. The touch device according to claim 1, wherein each of the third sensing electrodes is staggered and not overlapped with a corresponding first sensing electrode.