TW201821956A - Touch device - Google Patents

Abstract

A touch device includes a touch sensor substrate, a cover glass, a first pad, a second pad, a plurality of third pads, and a controller. The cover glass is configured to be laminated to the touch sensor substrate. The first pad is disposed on the cover glass. The second pad is disposed on the touch sensor substrate and corresponding to the first pad. The second pad is configured to receive a driving signal. The third pads are disposed on the touch sensor substrate. The third pads are configured to receive a plurality of coupled signals from the first pad and corresponding to the driving signal, respectively. The controller is configured to determining a deviating condition of the cover glass with respect to the touch sensor substrate according to the coupled signals.

Description

   Touch device   

The embodiments described in this disclosure are related to a touch technology, and more particularly to a touch device.

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.

In the traditional method, the alignment method between the touch sensing substrate and the cover glass is ink alignment. When there is an error in the alignment between the touch sensing substrate and the cover glass, the touch position determined by the touch device will be different from the actual touch position.

In view of this, the present disclosure proposes a touch device.

One embodiment of the present disclosure relates to a touch device. The touch device includes a touch sensing substrate, a cover glass, a first pad, a second pad, a plurality of third pads, and a controller. The cover glass is used for bonding with the touch sensing substrate. The first pad is disposed on the cover glass. The second pad is disposed on the touch sensing substrate corresponding to the first pad. The second pad is used to receive a driving signal. The third pads are disposed on the touch sensing substrate. The third pads are used to receive a plurality of coupling signals corresponding to the driving signals from the first pads, respectively. The controller is configured to determine an offset condition of the cover glass with respect 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 disposed on four sides of the second pad.

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

In some embodiments, the offset condition includes an offset amount 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 a reference signal, the controller determines that the cover glass is offset from the touch sensing substrate in a direction.

In some embodiments, the controller includes a transmitting circuit and a receiving 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 used to receive 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 larger than the third area.

In summary, the touch device in the present disclosure outputs a driving signal to the second pad provided on the touch-sensing substrate, and receives the third pad provided on the touch-sensing substrate from the cover disposed on the cover. The coupling signal of the first pad of the glass. In this way, the controller can determine the offset state of the cover glass with respect to the touch sensing substrate according to the coupling signal.

100‧‧‧ touch device

120‧‧‧ touch sensing substrate

140‧‧‧ Covered glass

160‧‧‧controller

162‧‧‧Transmitting circuit

164‧‧‧Receiving circuit

CG-PAD‧‧‧The first pad

TX‧‧‧Second Pad

RX-L‧‧‧The third pad

RX-R‧‧‧The third pad

RX-D‧‧‧The third pad

RX-U‧‧‧The third pad

X‧‧‧ direction

Y‧‧‧ direction

Z‧‧‧ direction

TS‧‧‧Drive Signal

CS1‧‧‧Coupled signal

CS2‧‧‧Coupled signal

CS3‧‧‧Coupled signal

CS4‧‧‧Coupled signal

600‧‧‧Compensation method

S602, S604‧‧‧ steps

In order to make the above and other objects, features, advantages, and embodiments of the present disclosure more comprehensible, the description of the drawings is as follows: FIG. 1 is a schematic diagram of a touch device according to an embodiment of the present disclosure. Figure 2 is a top view of the touch device of Figure 1 without being shifted; Figure 3 is a schematic diagram of the controller of the touch device of Figure 1; Figure 4 is the touch device of Figure 1 Top view in the case of an offset; FIG. 5 is a top view of the touch device in FIG. 1 in another offset; and FIG. 6 is a compensation method according to an embodiment of the present disclosure flow chart.

The following is a detailed description with examples and the accompanying drawings, but the examples provided are not intended to limit the scope covered by this disclosure, and the description of the structure operation is not intended to limit the order of its execution, and any recombination of components The structure of the device and the device with the same effect are all covered by the present disclosure. In addition, the drawings are for illustration purposes only, and are not drawn to the original dimensions. In order to facilitate understanding, the same elements or similar elements in the following description will be described with the same symbols.

In addition, the terms used throughout the specification and the scope of patent applications, unless otherwise specified, usually have the ordinary meaning of each term used in this field, the content disclosed here, and the special content. . Certain terms used to describe this disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art on the description of this disclosure.

About "about", "approximately", "approximately" or "substantially" used in this article is generally the error or range of the index value, which varies according to different technologies, and its range has common knowledge in the field It is understood by the author to have the broadest interpretation, thereby covering all variants and similar structures. In one embodiment, the error or range of the above-mentioned values refers to within 20%, preferably within 10%, and more preferably within 5%. Unless explicitly stated in the text, the numerical values mentioned are regarded as approximate values, such as errors or ranges indicated by "about", "approximately" or "approximately" or "essentially", or other approximate values.

It should be understood that relative terms such as "upper" or "lower" contained throughout this specification are used to describe the relationship between one element and another element as shown in the figures. Relative vocabulary is used to describe different orientations of the device beyond those described in the drawings. It is understandable. For example, if the device in a figure is turned over, the components originally described on the "lower" side of other components will become on the "upper" side of other components. Therefore, according to the specific direction of the drawing, the exemplary word "down" may include two directions of "down" and "up".

Regarding the "first", "second", ..., etc. used herein, they do not specifically refer to the order or order, nor are they used to limit the present invention. They are only used to distinguish elements described in the same technical terms. Or just operate.

The terms "including", "including", "having", "containing" and the like used in this article are all open-ended terms, which means 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 being shifted. For ease of understanding, FIG. 2 only illustrates the relative positions of the plural pads on the X-Y plane.

As shown in FIG. 1, the touch device 100 includes a touch sensing substrate 120 and a cover glass 140. In some embodiments, the cover glass 140 and the touch sensing substrate 120 are oppositely disposed 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 adhesive or other bonding materials. In some embodiments, the cover glass 140 is reinforced glass to increase the strength of the touch device 100. In some embodiments, a touch-sensing electrode is disposed on the touch-sensing substrate 120.

Next, please refer to Figure 1 and Figure 2 at the same time. 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 pad TX is disposed on the upper side of the touch sensing substrate 120. In some embodiments, the third pad RX-L, the third pad RX-R, the third pad RX-U, and the third pad RX-D are disposed on the upper side of the touch sensing substrate 120.

The relative positions of the pads described above are for example purposes only. Various configurations of these pads are within the scope of the present disclosure.

Taking the example in FIG. 2 as an example, the third pad RX-L, the third pad RX-R, the third pad RX-U, and the third pad RX-D are respectively disposed on the four pads of the second pad TX. side. 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 these pads described above is for example purposes only. Various numbers of these 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 judgment about the offset status 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 third pads can be selected according to actual needs.

In addition, the materials of the above-mentioned pads may be metal, metal oxide, or other various materials having conductive properties.

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 called a second area. The area of each of the third pads is called a third area. In some embodiments, the first area is larger than the second area, and the second area is larger than the third area. However, this disclosure is not limited by the above.

In addition, the touch device 100 further includes a controller 160. Please refer to Figure 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 a hardware circuit. For example, the controller 160 may be a control circuit, a microcontroller, a touch chip, or various other hardware components with control functions. The controller 160 is used 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.

Taking the example in FIG. 3, the controller 160 includes a transmitting circuit 162 and a receiving circuit 164. The transmitting circuit 162 is used for transmitting a driving signal TS. The receiving circuit 164 is configured to receive the coupling signal CS1, the coupling signal CS2, the coupling signal CS3, and the coupling signal CS4.

In some examples, the controller 160 further includes a processing circuit. The processing circuit is configured to determine the offset status of the cover glass 140 relative to the touch sensing substrate 120 according to the coupling signals CS1 to CS4. In some examples, the offset condition represents a degree of offset between the cover glass 140 and the touch-sensing substrate 120.

The structure of the controller 160 in FIG. 3 is for illustrative purposes only, and various structures used to implement the controller 160 are within the scope of consideration of this disclosure.

Next, please refer to Figure 2 and Figure 3 at the same time. 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 to couple 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.

The above coupling signals are received by the receiving circuit 164 of the controller 160. In this way, the controller 160 can determine the offset status of the cover glass 140 with respect 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.

Next, please refer to Figure 2. In FIG. 2, the cover glass 140 and the touch sensing substrate 120 are not offset. 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 can be used as a reference signal. Similarly, the coupling signal CS2, the coupling signal CS3, and the coupling signal CS4 also have lower voltage levels.

In some embodiments, when the voltage levels of all the coupling signals are equal to the voltage levels of the reference signal, the controller 160 determines that the cover glass 140 is aligned with the touch sensing substrate 120. In other words, the offset status of the cover glass 140 relative to the touch-sensing substrate 120 is not offset. Explained in another way, the offset amount of the cover glass 140 relative to the touch-sensing substrate 120 is zero. In some embodiments, the voltage level of the reference signal is stored in a register in the controller 160 in advance.

Please refer to Figure 4. FIG. 4 is a top view of the touch device 100 of FIG. 1 in the case of an offset. In FIG. 4, the cover glass 140 is shifted to the upper right of the drawing with respect to the touch sensing substrate 120. For ease of understanding, elements similar to those in FIG. 4 in FIG. 4 will be assigned the same reference numerals.

Taking the example in FIG. 4, because the cover glass 140 is shifted to the upper right of the drawing relative to the touch sensing substrate 120, the third pad RY-U and the first pad CG-PAD overlap in the Z direction. The third pad RX-R and the first pad CG-PAD also overlap in the Z direction. Because the third pad RX-U and the first pad CG-PAD overlap 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 the voltage level of the aforementioned reference signal. In other words, there is a difference between the voltage level of the coupling signal CS3 and the voltage level of the aforementioned reference signal. The controller 160 can determine 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 and the first pad CG-PAD also overlap 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 is able to determine the offset amount 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 CS3. In this embodiment, since the voltage level of the coupling signal CS2 and the coupling signal CS3 is high, the controller 160 determines that the cover glass 140 is shifted to the upper right with respect to the touch sensing 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 coupling signal CS1 and the coupling signal CS4 are still low.

In some embodiments, the controller 160 compensates the original touch coordinates according to the above-mentioned 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 offset from the touch sensing substrate 120 (eg, FIG. 2), the original touch coordinates will correspond to a specific position on the cover glass 140. However, when the cover glass 140 is offset from the touch sensing substrate 120 (eg, FIG. 4), the original touch coordinates will not correspond to the specific position. In other words, the touch position of the touch event will be misjudged. Taking the example in FIG. 4, with the configuration of the touch device 100, the controller 160 can compensate the original touch coordinates according to the aforementioned offset. In some embodiments, the compensation procedure may be implemented by software.

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

Taking the example in FIG. 5, because the cover glass 140 is shifted to the lower left of the drawing relative to the touch sensing substrate 120, the third pad RX-L and the first pad CG-PAD overlap in the Z direction The third pad RX-D and the first pad CG-PAD also overlap in the Z direction. Because the third pad RX-L and the first pad CG-PAD overlap 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 the voltage level of the aforementioned reference signal. The controller 160 is able to determine the offset 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 also overlap in the Z direction, the coupling signal CS4 received by the third pad RX-D from the first pad CG-PAD is also Has a higher voltage level. The controller 160 can determine the downward shift amount 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 CS4. In this embodiment, since the voltage levels of the coupling signal CS1 and the coupling signal CS4 are high, 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 also do not overlap in the Z direction. Accordingly, the voltage levels of the coupling signal CS2 and the coupling signal CS3 are still low.

It should be noted that, in the foregoing embodiments, the cover glass 140 is shifted to the upper right (for example, FIG. 4) or lower left (for example, FIG. 5) with respect to the touch sensing substrate 120 as an example. However, the embodiment in which the cover glass 140 is shifted relative to the touch-sensing substrate 120 in other directions (for example, up, left, down, bottom right, or top left) has similar operation content. I will not repeat them here.

Please refer to Figure 6. FIG. 6 is a flowchart of 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 an offset condition of the cover glass 140 according to one or more of the coupling signals CS1 to CS4. In some embodiments, the controller 160 calculates an offset of the cover glass 140 with respect to the touch-sensing substrate 120 in different directions (for example, the X direction and the Y direction).

In step S604, the controller 160 compensates the original touch coordinates according to the above-mentioned offset condition (offset amount). The relevant content of this step has been described in the foregoing embodiments. I will not repeat them here.

In summary, the touch device in the present disclosure outputs a driving signal to the second pad provided on the touch-sensing substrate, and receives the third pad provided on the touch-sensing substrate from the cover disposed on the cover. The coupling signal of the first pad of the glass. In this way, the controller can determine the offset state of the cover glass with respect to the touch sensing substrate according to the coupling signal.

Although this disclosure has been disclosed as above in the form of implementation, it is not intended to limit this disclosure. Any person with ordinary knowledge in the field can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, this disclosure The scope of protection shall be determined by the scope of the attached patent application.

Claims (10)

    A touch device includes: a touch sensing substrate; a cover glass for bonding with the touch sensing substrate; a first pad disposed on the cover glass; a second pad corresponding to the first A pad is disposed on the touch-sensing substrate, the second pad is used to receive a driving signal; a plurality of third pads are provided on the touch-sensing substrate, and the third pads are used to receive signals from A first pad and a plurality of coupling signals corresponding to the driving signal; and a controller for determining an offset condition of the cover glass relative to the touch sensing substrate according to the coupling signals.         The touch device according to 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.         The touch device according to claim 1, wherein the third pads surround the second pads.         The touch device according to claim 1, wherein the offset condition includes an offset amount and an offset direction.         The touch device according to 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.         The touch device according to claim 5, wherein the controller is further configured to determine a voltage 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. Offset.         The touch device according to claim 6, wherein the controller is further configured to compensate an original touch coordinate according to the offset.         The touch device according to claim 5, wherein at least one of the third pads is disposed in a direction opposite to the second pad, and when a receiving coupling signal of the at least one third pad is greater than In the reference signal, the controller determines that the cover glass is offset from the touch sensing substrate in the direction.         The touch device according to claim 1, wherein the controller includes: a transmitting circuit electrically connected to the second pad to generate the driving signal; and a receiving circuit electrically connected to the third contacts And is used to receive the coupling signals.         The touch device according to 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 The first area is larger than the second area, and the second area is larger than the third area.