CN106708316B

CN106708316B - Touch control device

Info

Publication number: CN106708316B
Application number: CN201611096919.0A
Authority: CN
Inventors: 吴锡尧; 罗文凯
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Cheng Cheng Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Cheng Cheng Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2016-12-02
Filing date: 2016-12-02
Publication date: 2019-12-10
Anticipated expiration: 2036-12-02
Also published as: CN106708316A; TWI598792B; TW201821956A

Abstract

A touch device comprises a touch sensing substrate, a cover glass, a first connecting pad, a second connecting pad, a plurality of third connecting pads and a controller. The cover glass is used for being attached to the touch sensing substrate. The first pad is arranged on the cover glass. The second pads are arranged on the touch sensing substrate corresponding to the first pads. The second pad is used for receiving a driving signal. The third pads are arranged on the touch sensing substrate. The third pads are used for respectively receiving a plurality of coupling signals which are from the first pads and correspond to the driving signals. The controller is used for judging an offset condition of the cover glass relative to the touch sensing substrate according to the coupling signals. Therefore, the touch device can judge the offset condition of the cover glass.

Description

Touch control device

Technical Field

embodiments described herein relate generally to a touch technology, and more particularly, to a touch device.

Background

with the development of technology, touch devices have been applied to various electronic devices, such as: smart phones, smart wearable devices, tablet computers and other electronic devices, and the like.

In a conventional method, the touch sensing substrate and the cover glass are aligned with each other by using ink. When the alignment between the touch sensing substrate and the cover glass has an error, the touch position determined by the touch device will be different from the actual touch position.

disclosure of Invention

In view of the above, the present disclosure provides a touch device.

One embodiment of the present disclosure relates to a touch device. The touch device comprises a touch sensing substrate, a cover glass, a first connecting pad, a second connecting pad, a plurality of third connecting pads and a controller. The cover glass is used for being attached to the touch sensing substrate. The first pad is arranged on the cover glass. The second pads are arranged on the touch sensing substrate corresponding to the first pads. The second pad is used for receiving a driving signal. The third pads are arranged on the touch sensing substrate. The third pads are used for respectively receiving a plurality of coupling signals which are from the first pads and correspond to the driving signals. The controller is used for judging an offset condition of the cover glass relative to the touch sensing substrate according to the coupling signals.

In some embodiments, the number of the third pads is four. The third pads are respectively arranged on four sides of the second pads.

In some embodiments, the third pads surround the second pads.

In some embodiments, the offset condition includes an offset and an offset direction.

In some embodiments, the controller is further configured to determine that the cover glass is aligned with the touch sensing substrate when the coupling signals are equal to a reference signal.

In some embodiments, the controller is further configured to determine an offset of the cover glass relative to the touch sensing substrate according to a voltage level difference between each of the coupling signals and the reference signal.

In some embodiments, the controller is further configured to compensate an original touch coordinate according to the offset.

In some embodiments, at least one of the third pads is disposed in a direction opposite to the second pad. When a receiving coupling signal of the at least one third pad is greater than the reference signal, the controller determines that the cover glass has an offset in a direction relative to the touch sensing substrate.

In some embodiments, the controller includes a transmit circuit and a receive circuit. The transmitting circuit is electrically connected to the second pad and is used for generating a driving signal. The receiving circuit is electrically connected to the third pads and is used for receiving the coupling signals.

in some embodiments, the first pad has a first area. The second pad has a second area. Each of the third pads has a third area. The first area is larger than the second area. The second area is greater than the third area.

In summary, the touch device in the present disclosure outputs the driving signal to the second pad disposed on the touch sensing substrate, and receives the coupling signal from the first pad disposed on the cover glass via the third pad disposed on the touch sensing substrate. Therefore, the controller can judge the offset condition of the cover glass relative to the touch sensing substrate according to the coupling signal.

Drawings

The foregoing and other objects, features, advantages and embodiments of the disclosure will be more readily understood from the following description taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic diagram of a touch device according to an embodiment of the disclosure;

FIG. 2 is a top view of the touch device of FIG. 1 without being shifted;

FIG. 3 is a schematic diagram of a controller of the touch device shown in FIG. 1;

FIG. 4 is a top view of the touch device of FIG. 1 in an offset condition;

FIG. 5 is a top view of the touch device of FIG. 1 in another offset condition; and

Fig. 6 is a flowchart illustrating a compensation method according to an embodiment of the disclosure.

Description of the main elements

100: touch control device

120: touch control induction substrate

140: cover glass

160: controller

162: transmitting circuit

164: receiving circuit

CG-PAD: first pad

TX: second pad

RX-L: third connecting pad

RX-R: third connecting pad

RX-D: third connecting pad

RX-U: third connecting pad

X: direction of rotation

Y: direction of rotation

Z: direction of rotation

TS: drive signal

CS 1: coupled signals

CS 2: coupled signals

CS 3: coupled signals

CS 4: coupled signals

600: compensation method

S602 and S604: step (ii) of

Detailed Description

The following detailed description of the embodiments with reference to the accompanying drawings is provided for purposes of illustration only and is not intended to limit the scope of the present disclosure, which is to be construed as a limitation on the scope of the disclosure, and any arrangement of components which results in a structure having equivalent functionality is intended to be included therein. In addition, the drawings are for illustrative purposes only and are not drawn to scale. For ease of understanding, the same or similar elements will be described with the same reference numerals in the following description.

Further, the terms (terms) used throughout the specification and claims have the ordinary meaning as commonly understood in the art, in the disclosure herein and in the claims, unless otherwise indicated. Certain terms used to describe the present disclosure will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present disclosure.

As used herein, the terms "about," "approximately," or "substantially" generally refer to an error or range of values, which can vary depending on the technique and the scope of the invention is to be accorded the broadest interpretation so as to encompass all such modifications and similar structures as is known to those skilled in the art. In one embodiment, the error or range of values is within twenty percent, preferably within ten percent, and more preferably within five percent. Unless expressly stated otherwise, the numerical values set forth herein are considered to be approximations, such as errors or ranges that may be expressed as, for example, terms such as "about," "about," or "substantially," or other approximations.

It will be understood that relative terms, such as "upper" or "lower," used throughout the specification to describe one element's relationship to another element as illustrated in the figures. Relative terms are used to describe different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then become on the "upper" side of the other elements. Thus, the exemplary words "lower" can encompass both a "lower" and an "upper" orientation, depending on the particular orientation of the figure.

As used herein, the terms "first," "second," …, etc. do not denote any order or importance, nor do they limit the present invention, but rather are used to distinguish one element from another element or operation described in the same technical language.

As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.

Fig. 1 is a schematic diagram of a touch device 100 according to an embodiment of the disclosure. Fig. 2 is a top view of the touch device 100 of fig. 1 without deviation. For ease of understanding, FIG. 2 depicts only the relative positions of the pads in the X-Y plane.

As shown in fig. 1, the touch device 100 includes a touch sensing substrate 120 and a cover glass (cover glass) 140. In some embodiments, the cover glass 140 is disposed opposite to the touch sensing substrate 120 in the direction Z. In some embodiments, the cover glass 140 is used to adhere to the touch sensing substrate 120. In some embodiments, the cover glass 140 and the touch sensing substrate 120 are bonded by using an adhesive or other bonding material. In some embodiments, the cover glass 140 is a strengthened glass to enhance the strength of the touch device 100. In some embodiments, the touch sensing substrate 120 has a touch sensing electrode disposed thereon.

Please refer to fig. 1 and fig. 2 simultaneously. The touch device 100 further includes a first PAD CG-PAD, a second PAD TX, a third PAD RX-L, a third PAD RX-R, a third PAD RX-U, and a third PAD RX-D.

In some embodiments, the first PAD CG-PAD is disposed on the cover glass 140. The second PAD TX is disposed corresponding to the first PAD CG-PAD and is disposed on the touch sensing substrate 120. In some embodiments, the first PAD CG-PAD is disposed on the lower side of the cover glass 140. The second pads TX are disposed on the upper side of the touch sensing substrate 120. In some embodiments, the third pads RX-L, RX-R, RX-U and RX-D are disposed on the upper side of the touch sensing substrate 120.

the relative positions of the pads (pads) are for illustrative purposes only. Various configurations of these pads are within the scope of the present disclosure.

In the example of fig. 2, the third pad RX-L, the third pad RX-R, the third pad RX-U, and the third pad RX-D are disposed on four sides of the second pad TX, respectively. In some embodiments, the third pad RX-L, the third pad RX-R, the third pad RX-U, and the third pad RX-D surround the second pad TX. In some embodiments, the third pads have the same area, but the disclosure is not limited thereto. In some other embodiments, the areas of the third pads are different from each other or partially the same.

The number of such pads is for exemplary purposes only. Various numbers of such pads are within the scope of the present disclosure. For example, in some other embodiments, the touch device 100 includes more than four third pads. When the number of the third pads is larger, the determination of the offset condition of the cover glass 140 will be more accurate. In other words, the number of the third pads is not limited to four. The number of the third pads can be selected according to actual requirements.

In addition, the material of the pads can be metal, metal oxide or other materials with conductive characteristics.

In some embodiments, the area of the first PAD CG-PAD is referred to as a first area. The area of the second pad TX is referred to as a second area. The area of each of these third pads is referred to as a third area. In some embodiments, the first area is greater than the second area, and the second area is greater than the third area. However, the present disclosure is not limited to the above.

In addition, the touch device 100 further includes a controller 160. Please refer to fig. 3. Fig. 3 is a schematic diagram of the controller 160 of the touch device 100 of fig. 1.

In some embodiments, the controller 160 is implemented in hardware circuitry. For example, the controller 160 may be a control circuit, a microcontroller, a touch chip, or other various hardware components with control functions. The controller 160 is configured to output various signals. In some embodiments, the controller 160 is disposed on a circuit board. In some embodiments, the circuit board may be a printed circuit board or a flexible circuit board.

For the example of fig. 3, the controller 160 includes a transmit circuit 162 and a receive circuit 164. The transmitting circuit 162 is used for transmitting the driving signal TS. The receiving circuit 164 is used for receiving the coupling signal CS1, the coupling signal CS2, the coupling signal CS3 and the coupling signal CS 4.

In some examples, the controller 160 further includes processing circuitry. The processing circuit is used for determining the deviation condition of the cover glass 140 relative to the touch sensing substrate 120 according to the coupling signals CS 1-CS 4. In some examples, the offset condition represents a degree of offset between the cover glass 140 and the touch sensing substrate 120.

The configuration of the controller 160 in fig. 3 is for illustrative purposes only, and various configurations used to implement the controller 160 are within the contemplation of the present disclosure.

please refer to fig. 2 and fig. 3. In some embodiments, the second pad TX is electrically connected to the transmitting circuit 162 of the controller 160. Accordingly, the second pad TX receives the driving signal TS. The first PAD CG-PAD is used for coupling the driving signal TS.

In some embodiments, the third pad RX-L is electrically connected to the receiving circuit 164 of the controller 160. Accordingly, the third PAD RX-L receives the coupling signal CS1 coupled by the first PAD CG-PAD. Similarly, the third pad RX-R is electrically connected to the receiving circuit 164 of the controller 160. Accordingly, the third PAD RX-R receives the coupling signal CS2 coupled by the first PAD CG-PAD. Similarly, the third pad RX-U is electrically connected to the receiving circuit 164 of the controller 160. Accordingly, the third PAD RX-U receives the coupling signal CS3 coupled by the first PAD CG-PAD. Similarly, the third pad RX-D is electrically connected to the receiving circuit 164 of the controller 160. Accordingly, the third PAD RX-D receives the coupling signal CS4 coupled by the first PAD CG-PAD.

These coupled signals are received by the receiving circuit 164 of the controller 160. Thus, the controller 160 can determine the offset condition of the cover glass 140 relative to the touch sensing substrate 120 according to the coupling signals. In some embodiments, the offset condition includes an offset amount and an offset direction.

In some embodiments, the first PAD CG-PAD is electrically connected to the controller 160. In some other embodiments, the first PAD CG-PAD is not electrically connected to the controller 160.

Please refer to fig. 2. In fig. 2, the cover glass 140 is not offset from the touch sensing substrate 120. In this case, the third PAD RX-L and the first PAD CG-PAD do not overlap in the Z direction. Accordingly, the coupling signal CS1 received by the third pad RX-L has a lower voltage level. In this case, the coupling signal CS1 may be used as a reference signal. Similarly, the coupling signal CS2, the coupling signal CS3 and the coupling signal CS4 have lower voltage levels.

In some embodiments, when the voltage levels of all the coupled signals are equal to the voltage level of the reference signal, the controller 160 determines that the cover glass 140 is aligned with the touch sensing substrate 120. That is, the cover glass 140 is not shifted relative to the touch sensing substrate 120. Explained another way, the cover glass 140 has zero offset with respect to the touch sensing substrate 120. In some embodiments, the voltage level of the reference signal is pre-stored in a register of the controller 160.

Please refer to fig. 4. Fig. 4 is a top view of the touch device 100 of fig. 1 under an offset condition. In fig. 4, the cover glass 140 is offset to the upper right of the drawing with respect to the touch sensing substrate 120. For ease of understanding, components in FIG. 4 that are similar to those in FIG. 2 will be assigned the same reference numerals.

In the example of fig. 4, since the cover glass 140 is offset to the upper right of the drawing plane relative to the touch sensing substrate 120, the third PAD RX-U overlaps the first PAD CG-PAD in the Z direction, and the third PAD RX-R overlaps the first PAD CG-PAD in the Z direction. Since the third PAD RX-U overlaps the first PAD CG-PAD in the Z direction, the coupling signal CS3 received by the third PAD RX-U from the first PAD CG-PAD has a higher voltage level. In this case, the voltage level of the coupling signal CS3 is higher than that of the reference signal. In other words, the voltage level of the coupled signal CS3 has a difference with the voltage level of the reference signal. The controller 160 determines the upward shift of the cover glass 140 according to the voltage level difference between the coupling signal CS3 and the reference signal.

Similarly, since the third PAD RX-R overlaps the first PAD CG-PAD in the Z direction, the coupling signal CS2 received by the third PAD RX-R from the first PAD CG-PAD also has a higher voltage level. The controller 160 determines the amount of shift of the cover glass 140 to the right according to the voltage level difference between the coupling signal CS2 and the reference signal.

In some embodiments, the controller 160 can determine the offset direction of the cover glass 140 relative to the touch-sensing substrate 120 according to the coupling signal CS2 and the coupling signal CS 3. In this embodiment, since the voltage levels of the coupling signal CS2 and the coupling signal CS3 are higher, the controller 160 determines that the cover glass 140 is shifted to the upper right with respect to the touch-sensitive substrate 120.

In addition, the third PAD RX-L and the first PAD CG-PAD do not overlap in the Z-direction. The third PAD RX-D and the first PAD CG-PAD do not overlap in the Z direction. Accordingly, the voltage levels of the coupled signal CS1 and the coupled signal CS4 are still low.

In some embodiments, the controller 160 compensates the original touch coordinates according to the offset. Specifically, when a touch event occurs, the controller 160 generates an original touch coordinate according to a touch signal generated by a touch sensing electrode on the touch sensing substrate 120. If the cover glass 140 is not shifted relative to the touch sensing substrate 120 (e.g., fig. 2), the original touch coordinates correspond to a specific position on the cover glass 140. However, when the cover glass 140 is shifted relative to the touch sensing substrate 120 (e.g., FIG. 4), the original touch coordinates will not correspond to the specific position. That is, the touch position of the touch event is determined by mistake. As shown in fig. 4, the controller 160 can compensate the original touch coordinate according to the offset by configuring the touch device 100. In some embodiments, the compensation procedure may be implemented in software.

Please refer to fig. 5. FIG. 5 is a top view of the touch device 100 of FIG. 1 under another offset condition. In fig. 5, the cover glass 140 is offset to the lower left of the drawing with respect to the touch sensing substrate 120. For ease of understanding, components in FIG. 5 that are similar to components in FIG. 4 will be assigned the same reference numerals.

In the example of fig. 5, since the cover glass 140 is offset to the lower left of the drawing surface relative to the touch sensing substrate 120, the third PAD RX-L and the first PAD CG-PAD overlap in the Z direction, and the third PAD RX-D and the first PAD CG-PAD also overlap in the Z direction. Since the third PAD RX-L overlaps the first PAD CG-PAD in the Z direction, the coupling signal CS1 received by the third PAD RX-U from the first PAD CG-PAD has a higher voltage level. In this case, the voltage level of the coupling signal CS1 is higher than that of the reference signal. The controller 160 determines the amount of displacement of the cover glass 140 to the left according to the voltage level difference between the coupling signal CS1 and the reference signal.

Similarly, since the third PAD RX-D and the first PAD CG-PAD overlap in the Z direction, the coupling signal CS4 received by the third PAD RX-D from the first PAD CG-PAD also has a higher voltage level. The controller 160 determines the downward offset of the cover glass 140 according to the voltage level difference between the coupling signal CS4 and the reference signal.

In some embodiments, the controller 160 can determine the offset direction of the cover glass 140 relative to the touch-sensing substrate 120 according to the coupling signal CS1 and the coupling signal CS 4. In this embodiment, since the voltage levels of the coupling signal CS1 and the coupling signal CS4 are higher, the controller 160 determines that the cover glass 140 is shifted to the lower left with respect to the touch sensing substrate 120.

In addition, the third PAD RX-R and the first PAD CG-PAD do not overlap in the Z-direction. The third PAD RX-U and the first PAD CG-PAD do not overlap in the Z direction. Accordingly, the voltage levels of the coupled signal CS2 and the coupled signal CS3 are still low.

It should be noted that, in the above embodiments, the cover glass 140 is shifted to the upper right (for example, fig. 4) or the lower left (for example, fig. 5) relative to the touch sensing substrate 120. However, embodiments in which the cover glass 140 is shifted in other directions (e.g., up, left, down, right down, or left up) relative to the touch-sensitive substrate 120 have similar operation. And will not be described in detail herein.

Please refer to fig. 6. Fig. 6 is a flowchart illustrating a compensation method 600 according to an embodiment of the disclosure. In some embodiments, the compensation method 600 is applied to the touch device 100.

In step S602, the controller 160 calculates the deviation of the cover glass 140 according to one or more of the coupling signals CS 1-CS 4. In some embodiments, the controller 160 calculates the offset of the cover glass 140 relative to the touch-sensing substrate 120 in different directions (e.g., the X direction and the Y direction).

In step S604, the controller 160 compensates the original touch coordinates according to the offset condition (offset). The relevant contents of this step are already described in the foregoing embodiments. And will not be described in detail herein.

While the foregoing is directed to embodiments of the present disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. A touch device, comprising:

A touch sensing substrate;

The cover glass is used for being attached to the touch sensing substrate;

A first pad disposed on the cover glass;

the second connecting pad is arranged on the touch control induction substrate corresponding to the first connecting pad and used for receiving a driving signal;

A plurality of third pads disposed on the touch sensing substrate, the third pads being configured to receive a plurality of coupling signals corresponding to the driving signal from the first pad, respectively; and

And the controller is used for judging the offset condition of the cover glass relative to the touch sensing substrate according to the coupling signals.

2. The touch device as recited in claim 1, wherein the number of the third pads is four, and the third pads are respectively disposed on four sides of the second pad.

3. The touch device as recited in claim 1, wherein the third pads surround the second pads.

4. The touch device of claim 1, wherein the offset condition comprises an offset amount and an offset direction.

5. the touch device of claim 1, wherein the controller is further configured to determine that the cover glass is aligned with the touch sensing substrate when the coupling signals are equal to a reference signal, wherein the reference signal corresponds to an un-offset condition of the cover glass relative to the touch sensing substrate.

6. The touch device of claim 5, wherein the controller is further configured to determine an offset of the cover glass relative to the touch sensing substrate according to a voltage level difference between each of the coupling signals and the reference signal.

7. The touch device of claim 6, wherein the controller is further configured to compensate an original touch coordinate according to the offset.

8. The touch device as recited in claim 5, wherein at least one of the third pads is disposed in a direction relative to the second pad, and when a receive coupling signal of the at least one third pad is greater than the reference signal, the controller determines that the cover glass has an offset in the direction relative to the touch sensing substrate.

9. The touch device of claim 1, wherein the controller comprises:

A transmitting circuit electrically connected to the second pad and used for generating the driving signal; and

And the receiving circuit is electrically connected with the third connecting pads and is used for receiving the coupling signals.

10. The touch device as recited in claim 1, wherein the first pad has a first area, the second pad has a second area, and each of the third pads has a third area, the first area being larger than the second area, and the second area being larger than the third area.