TWI779225B - Touch system - Google Patents

Abstract

A touch system includes a touch panel and a sensing circuit. The touch panel includes a first touch electrode and a second touch electrode. The first touch electrode is adjacent to the second touch electrode to form a sensing unit. The sensing unit includes a first area and a second area. The first area is configured to generate a touch signal having a first level in response to contact points of an object. The second area is configured to generate the touch signal having a second level in response to the contact points, in which the first level is different from the second level. The sensing circuit is configured to receive the touch signal and identify the object according to the touch signal having the first level.

Description

touch system

The present disclosure relates to a touch system, and in particular to a touch system for identifying objects.

In the prior art, an image capture device (such as a camera) is used to identify objects. However, due to the high cost and complexity of the recognition system using the camera to capture objects, the volume of the overall system will also increase significantly. In addition, due to the movement or rotation of the object, the recognition system may also make misjudgments, resulting in a reduction in the resolution of the recognition.

In order to solve the above problems, in an embodiment of the present disclosure, a touch control system includes a touch panel and a sensing circuit. The touch panel includes a first touch electrode and a second touch electrode, the first touch electrode and the second touch electrode are adjacent to form a sensing unit, and the sensing unit includes a first area and a second area. The first area is used for generating a touch signal with a first potential in response to a plurality of contact points of the object. The second area is used for generating a touch signal with a second potential in response to the contact points, wherein the first potential is different from the second potential. The sensing circuit is used to receive the touch signal, and according to the touch signal with the first potential Identify objects.

To sum up, the touch system provided by some embodiments of this case can reduce the identification cost of using the camera to capture objects, and the size of the identification system will also be reduced, and the application of different sensing areas of the touch panel and the predetermined database can be implemented. Cooperate to improve identification resolution and reduce misjudgment.

100‧‧‧touch system

110‧‧‧objects

120‧‧‧touch panel

130‧‧‧Sensing circuit

140‧‧‧memory

150‧‧‧display

202‧‧‧Sensing unit

204‧‧‧Bridging

205‧‧‧Glass

220‧‧‧The first area

230‧‧‧The second area

S310, S320, S330, S340, S350, S360‧‧‧operation

CMD1‧‧‧touch signal

CMD2‧‧‧Reference Signal

CMD3‧‧‧control signal

TH‧‧‧threshold value

Tx‧‧‧first touch electrode

Rx‧‧‧Second touch electrode

dummy‧‧‧dummy block

X‧‧‧first direction

Y‧‧‧Second direction

A-A’‧‧‧Line segment

REF‧‧‧reference potential

TP‧‧‧delivery path

V1‧‧‧First Potential

B-B’‧‧‧Line segment

V2‧‧‧Second Potential

The illustrations of this case are as follows: Fig. 1 is a schematic diagram of a touch control system according to some embodiments of this case; Fig. 2A is a schematic diagram of a touch panel according to some embodiments of this case; Fig. 2B The figure is a schematic diagram of a single sensing unit in Figure 2A according to some embodiments of the present case; Figure 2C is a cross-sectional view along the line AA' of Figure 2B according to some embodiments of the present case and a schematic diagram of touch operation; FIG. 2D is a cross-sectional view drawn along line BB' of FIG. 2B and a schematic diagram of touch operation according to some embodiments of this case; FIG. 2E is a schematic diagram of some implementations according to this case A schematic diagram of the measurement of the touch sensing intensity of the sensing unit in Figure 2B drawn by the example; Figure 3 is a flow chart of the control method according to some embodiments of the present case; Figure 4A is another implementation according to the present case Schematic diagram of the dummy block shown in the example; FIG. 4B is a schematic diagram of a dummy block according to other embodiments of the present application; and FIG. 4C is a schematic diagram of a dummy block according to other embodiments of the present application.

In this document, terms such as first, second and third are used to describe various elements, components, regions, layers and/or blocks to be understood. But these elements, components, regions, layers and/or blocks should not be limited by these terms. These terms are limited to identifying a single element, component, region, layer and/or block. Therefore, a first element, component, region, layer and/or block hereinafter may also be referred to as a second element, component, region, layer and/or block without departing from the original meaning of the present application.

In this article, "a" and "the" can generally refer to one or more, unless the article is specifically limited in the context. It will be further understood that the terms "comprising", "comprising", "having" and similar words used herein indicate the features, regions, integers, steps, operations, elements and/or components described therein, but do not exclude One or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof described or additional thereto.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have their ordinary meanings that can be understood by those skilled in the art. Furthermore, the definitions of the above-mentioned terms in commonly used dictionaries should be interpreted as relevant to this case in the content of this manual. domain-consistent meaning. Unless specifically defined, these terms are not to be interpreted in an idealized or overly formal sense.

As used herein, "about," "approximately," or "substantially" includes stated values and averages within acceptable deviations from a particular value as determined by one of ordinary skill in the art, taking into account the measurements in question and relative A specific amount of measurement-related error (ie, a limitation of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value. Furthermore, "about", "approximately" or "substantially" used herein may select a more acceptable deviation range or standard deviation according to optical properties, etching properties or other properties, and may not use one standard deviation to apply to all properties .

When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or there may be an additional element present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no additional elements present.

The following will disclose multiple implementation modes of this case with diagrams. For the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the present case. That is to say, in some implementations of this case, these practical details are unnecessary. In addition, for the sake of simplifying the drawings, some well-known structures and components will be shown in a simple and schematic manner in the drawings.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a touch control system 100 according to some embodiments of the present application. The touch system 100 includes a touch panel 120 , a sensing circuit 130 , a memory 140 and a display 150 . When the object 110 touches the touch panel 120, the touch panel 120 will generate one or more touch The control signal CMD1 is sent to the sensing circuit 130 . The sensing circuit 130 compares and searches one or more touch signals CMD1 to a predetermined database in the memory 140 to identify the object 110 . After the identification is completed, the sensing circuit 130 outputs the control signal CMD3 to the display 150 . The display 150 outputs a display image related to the object 110 according to the control signal CMD3.

For example, in some applications, object 110 may be chess. A plurality of contact points (such as bumps) are preset on the lower surface of the chess. Depending on the chess piece, the arrangement of multiple contact points will be different. In this way, when the object 110 touches the touch panel 120 , the touch panel 120 will output different touch signals CMD1 to the sensing circuit 130 . The sensing circuit 130 can search the predetermined database of the memory 140 according to the received touch signal CMD1 to identify what kind of chess piece the object 110 is. In some embodiments, the memory 140 may pre-store a look-up table (ie, the aforementioned predetermined database) that records the correspondence between the type of the object 110 , the arrangement of the corresponding contact points, and the touch signal CMD1 . In addition, when the sensing circuit 130 recognizes that the object 110 is chess, the sensing circuit 130 can send a control signal CMD3 to the display 150 to control the display 150 to display a chess board image, so that the user can play chess on the touch system 100 .

The above application of the touch control system 100 and the object 110 is for example, and this application is not limited thereto.

Referring to FIG. 2A , FIG. 2A is a schematic diagram of a touch panel 120 according to some embodiments of the present application. In some embodiments, the touch panel 120 includes a plurality of sensing units 202 . Each sensing unit 202 is used to sense the touch of the object 110 to facilitate subsequent recognition by the touch control system 100 .

Referring to FIG. 2B , FIG. 2B is a schematic diagram of the single sensing unit 202 shown in FIG. 2A according to some embodiments of the present application. The sensing unit 202 includes a first touch electrode Tx, a second touch electrode Rx, a dummy block dummy and a bridge 204 . In some embodiments, the first touch electrodes Tx extend approximately in the first direction X, and the second touch electrodes Rx approximately extend in the second direction Y, wherein the first direction X and the second direction Y are interlaced. In some embodiments, the first touch electrode Tx and the second touch electrode Rx are adjacent to and not connected to the dummy block. As shown in FIG. 2B , the plurality of second touch electrodes Rx in the second direction Y are connected to each other by bridges 204 , while the first touch electrodes Tx in the first direction X are directly connected.

In some embodiments, the first touch electrode Tx, the second touch electrode Rx and the dummy region dummy can be implemented by indium tin oxide (ITO). In some embodiments, the first touch electrode Tx, the second touch electrode Rx, and the dummy block dummy can be implemented by other suitable conductive materials, such as alloy, metal oxide, metal nitride, metal oxynitride, and and/or stacked layers of other conductive materials, etc.

The above implementations about the first touch electrode Tx, the second touch electrode Rx and the dummy block are for example, and the present application is not limited thereto.

As shown in FIG. 2B , the first touch electrode Tx is coupled to the sensing circuit 130 to receive the reference signal CMD2 . When the sensing unit 202 is touched by multiple contact points of the object 110 , the second touch electrode Rx generates a corresponding touch signal CMD1 to the sensing circuit 130 in response to the multiple contact points and the reference signal CMD2 .

In some embodiments, the dummy block dummy is disposed between the first touch electrode Tx and the second touch electrode Rx, and does not contact the first touch electrode Tx or the second touch electrode Rx. In some embodiments, the dummy block dummy is used to configure the area ratio between the first region (such as the region 220 shown in FIG. 2E ) and the second region (such as the region 230 in FIG. 2E ) in the sensing unit 202 , wherein the first area 220 and the second area 230 have different sensitivity to touch, and the following paragraphs will refer to FIG. 2C to FIG. 2E in detail.

In some embodiments, the dummy block dummy can be set to any shape and any area according to design requirements. For example, as shown in FIG. 2B, the shape of the dummy block dummy can be set as a rhombus or a polygon similar to a rhombus.

Referring to FIG. 2C, FIG. 2C is a cross-sectional view along line A-A' of FIG. 2B and a schematic diagram of touch operation according to some embodiments of the present application. The sensing unit 202 is covered by a layer of glass 205 (for example, the surface of the touch panel 120 ), as shown in the sensing unit 202 in FIG. 2C . The first touch electrode Tx is used to transmit the reference signal CMD2 to the second touch electrode Rx, wherein the reference signal CMD2 has a reference potential REF. Since the dummy block dummy is separated between the first touch electrode Tx and the second touch electrode Rx, the reference signal CMD2 passes through the glass 205 to cross the dummy block dummy (as shown in the transfer path TP) to the second touch electrode Rx. The second touch electrode Rx outputs the received second touch electrode Rx as a touch signal CMD1 having a first potential V1.

In some embodiments, when the object 110 touches the sensing unit 202 , the object 110 will affect the reference signal CMD2 penetrating the glass 205 , so that the potential of the reference signal CMD2 received by the second touch electrode Rx is significantly lower than the reference potential REF. Accordingly, the second touch electrode Rx outputs the received reference signal CMD2 as the control signal CMD1 having the first potential V1, wherein the first potential V1 is lower than the reference potential REF.

Referring to FIG. 2D, FIG. 2D is a cross-sectional view along line B-B' of FIG. 2B and a schematic diagram of touch operation according to some embodiments of the present application. Compared with FIG. 2C, since there is no dummy block between the first touch electrode Tx and the second touch electrode Rx, the reference signal CMD2 can be directly transmitted under the glass 205 (such as the transmission path TP), and It is not necessary to penetrate the glass 205 to cross the dummy block. Therefore, no matter whether the object 110 is in contact with the glass 205 or not, the reference potential REF of the reference signal CMD2 received by the second touch electrode Rx has little change. Correspondingly, in this arrangement, the touch signal CMD2 output by the second touch electrode Rx has a second potential V2, and the second potential V2 is substantially the same as the reference potential REF.

In some embodiments, the output reference signal CMD2 of the first touch electrode Tx can be adjusted according to design requirements, and the adjustment content includes the transmission path TP and the reference potential REF of the reference signal CMD2 .

According to FIG. 2C and FIG. 2E , the dummy region dummy can be set to change the reference potential REF of the reference signal CMD2 received by the second touch electrode Rx, so that the sensing unit 202 has a strong sensing ability for touch. One area (such as the area 220 in FIG. 2E ), and let the sensing unit 202 have a second area (such as the area 230 in FIG. 2E ) that has a weaker touch sensing capability.

As previously shown in FIG. 1 , in some embodiments, the sensing circuit 130 is used to receive the touch signal CMD1 and identify the object 110 according to the touch signal CMD1 having the first potential V1. In some embodiments, the sensing circuit 130 compares the touch signal CMD1 with the threshold value TH in the memory 140 to determine whether the touch signal CMD1 has the first potential V1 or the second potential V2. If the potential of the touch signal CMD1 is lower than the threshold value TH, the sensing circuit 130 determines that the touch signal CMD1 has the first potential V1. If the potential of the touch signal CMD1 is not less than the threshold value TH, the sensing circuit 130 determines that the touch signal CMD1 has the second potential V2.

In some embodiments, when the touch signal CMD1 is determined to have the first potential V1, it means that the first sensing area 220 of the sensing unit 202 is touched by the contact point of the object 110 . In this way, according to the touch signal CMD1 with the first potential V1 returned by one or more sensing units 202, the sensing circuit 130 can determine the arrangement of multiple contact points on the object 110, and then search the memory 140 for further The type of the object 110 is identified.

Refer to Figure 2E. FIG. 2E is a schematic diagram of measuring the touch sensing intensity of the sensing unit in FIG. 2B according to some embodiments of the present application. In FIG. 2E , dots represent pressing points in the sensing unit 202 that have obvious responses to touch. As previously discussed in FIG. 2C, by setting the dummy block, the second touch electrode Rx can output the control signal CMD1 with a lower potential V1 according to the contact of the object 110, so it can clearly reflect whether there is an object or not. 110 touch points touch. As shown in FIG. 2E , through the measurement test, the first area 220 is the sensing area of the sensing unit 220 that has a relatively obvious response to touch.

Alternatively, as shown in FIG. 2E , the blank portion represents the pressing point in the sensing unit 202 that has little response to the touch. As previously discussed in FIG. 2D, if the dummy block is not set at the position, no matter whether the object 110 is in contact or not, the second touch electrode Rx outputs a control signal having the same second potential V2 as the reference potential REF. CMD1 cannot reflect whether it is touched by the contact point of the object 110. Through the measurement test, as shown in FIG. 2E , the second area 230 (that is, the blank portion) is the sensing area of the sensing unit 220 that has no obvious response to the touch.

As shown in FIG. 2B , the dummy blocks dummy are all arranged at the corners of the sensing unit 202 , so that the first area 220 in FIG. 2E is roughly correspondingly distributed on the periphery. Since there is no dummy block dummy at the center of the sensing unit 202 , the center block in FIG. 2E is approximately the second area 230 . In other words, in some embodiments, the area of the dummy block dummy in the first region 220 is larger than the area of the dummy block dummy in the second region 230 .

In some embodiments, the dummy block dummy is used to set the area ratio of the first region 220 and the second region 230 in the sensing unit 202 .

In some embodiments, among the plurality of contact points contained in the object 110, when the square root of the area of a single contact point and the square root of the area of the sensing unit 202 combine to form the square root of the area of a single sensor area, the touch system 100 The recognition rate is high. The recognition rate of the touch system 100 can also be improved when the area of the contact point is smaller and the area of the sensing unit 202 is larger. In some embodiments, the area of the first region 220 is greater than the area of the second region 230 . For example, in some non-limiting experimental examples, the area ratio of the first region 220 and the second region 230 can be set to about 7:3, and the touch system 100 has a sufficiently high recognition rate (for example For example, in this experimental example, depending on the contact angle of the object 110 , the recognition rate can range from at least about 73.3% to 93.3%).

In some embodiments, through experimental tests, when the object 110 touches the touch panel 120, the area covered by a single contact point on the first region 220 is not less than a quarter of the area of a single contact point, and the touch system 100 Induction can be generated. In some embodiments, the sum of the area of the single contact point of the object 110 and the area of the first region 220 may be set to be about 0.8˜1.2 times the sum of the area of the first region 220 and the second region 230 . In actual application, the setting of the area of each of the above regions can be further adjusted according to the feasibility of the contact point of the object 110 and/or the layout of the sensing unit 202 .

Referring to FIG. 3 , FIG. 3 is a flowchart of a control method according to some embodiments of the present application. Based on the application that the sensing unit 202 uses two different sensing areas, the touch system 100 can avoid the recognition error caused by the rotation or the deviation of the touch angle of the object 110, and achieve the object 110 with the comparison and search of the preset database. identification work.

In operation S310 , the object 110 touches a plurality of contact points to the sensing unit 202 of the touch panel 120 .

In operation S320 , the reference signal CMD2 on the surface of the sensing unit 202 changes the reference potential V of the reference signal CMD2 due to the contact of the object 110 , and the reference signal CMD2 is received by the second touch electrode Rx.

In operation S330 , the sensing unit 202 generates a touch signal CMD1 in response to the reference signal CMD2 whose reference potential V is changed, and transmits the touch signal CMD1 to the sensing circuit 130 for identification operation.

In operation S340, the sensing circuit 130 receives the touch signal CMD1, and determine whether the potential of the touch signal CMD1 is the first potential or the second potential.

In operation S350 , the sensing circuit 130 searches a default database to identify the object 110 . The default database includes a plurality of object data for the sensing circuit 130 to compare the touch signal CMD1. When the sensing circuit 130 identifies the object 110 successfully, it will generate a control signal CMD3 to the display 150 .

In operation S360 , the display 150 receives the control signal CMD3 and outputs a display image associated with the object 110 .

Referring to FIG. 4A, FIG. 4B and FIG. 4C, FIG. 4A, FIG. 4B and FIG. 4C are a plurality of schematic diagrams of dummy blocks according to some embodiments of the present application. The dummy block can be configured in any shape and any area ratio according to the requirements of application and design. For example, the setting method of the dummy block dummy can be an ellipse or a quasi-ellipse as shown in FIG. 4A, or a triangle as shown in FIGS. 4B and 4C. Different designs of dummy blocks will affect the area ratio of the first region 220 and the second region 230 .

The shape of the dummy block dummy shown in each figure is for example. Various configurations of dummy blocks that can be used to set the first area 220 and the second area 230 are within the scope of this application.

To sum up, the touch system provided by some embodiments of this case can reduce the identification cost of using the camera to capture objects, and the size of the identification system will also be reduced, and the application of different sensing areas of the touch panel and the predetermined database can be implemented. Cooperate to improve identification resolution and reduce misjudgment.

Although this case has disclosed the above in the way of implementation, it does not limit this case. Anyone who is familiar with this technology can make various changes and modifications without departing from the spirit and scope of this case. Therefore, the scope of protection of this case should be regarded as attached The one defined in the scope of the patent application shall prevail.

100‧‧‧touch system

110‧‧‧objects

120‧‧‧touch panel

130‧‧‧Sensing circuit

140‧‧‧memory

150‧‧‧display

CMD1‧‧‧touch signal

CMD3‧‧‧control signal

TH‧‧‧threshold value

Claims (7)

A touch control system, comprising: a touch panel, including a plurality of sensing units, wherein each of the sensing units includes: a first touch electrode extending in a first direction; a second touch electrode extending in a first direction extending in two directions, wherein the first direction is intersected with the second direction Y; and at least one dummy block is disposed between the first touch electrode and the second touch electrode, wherein the first touch electrode, The second touch electrode is adjacent to and not connected to the at least one dummy block, wherein the first touch electrode is used to transmit a reference signal to the second touch electrode, wherein when an object touches the sensing unit set There is a first region of the at least one dummy block, the potential of the reference signal received by the second touch electrode is a first potential, and the at least one dummy block is not provided when the object touches the sensing unit A second area, the potential of the reference signal received by the second touch electrode is a second potential, the second potential is greater than the first potential, wherein the first potential is set according to the size of the at least one dummy block A ratio of an area to the second area in the sensing unit, wherein the first area is distributed on the periphery of the second area; a sensing circuit, coupled to the touch panel; and a memory, coupled to the The sensing circuit is used to store a threshold value, wherein the sensing circuit is further used to compare the threshold value with the reference signal received by the second touch electrode to determine the threshold value received by the second touch electrode. The reference signal has the first potential or the second potential. The touch control system as claimed in claim 1, wherein the reference signal has a reference potential. The touch system according to claim 2, wherein the second touch electrode is used to receive the reference signal to generate a touch signal in response to the object being touched. The touch system according to claim 1, wherein if the reference signal received by the second touch electrode is smaller than the threshold value, the sensing circuit determines that the reference signal received by the second touch electrode has the first a potential, and if the potential of the reference signal received by the second touch electrode is not less than the threshold value, the sensing circuit determines that the reference signal received by the second touch electrode has the second potential. The touch system as described in claim 1, wherein the memory is further used to store a default database, and the touch system further includes: a display, which is used to output a display according to a control signal of the sensing circuit screen, and the display screen is associated with the object, wherein the sensing circuit is further used to search the default database according to the reference signal received by the second touch electrode having the first potential, so as to output the control signal . The touch control system according to claim 1, wherein in the sensing unit, the first area has a first area and the second area has a second area, and the first area is larger than the second area. The touch control system according to claim 6, wherein a ratio of the first area to the second area is 7:3.

Images