TWI779678B - Mutual capacitive touch device and touch display device and electronic equipment using the same - Google Patents

Abstract

A mutual capacitive touch device, which has a rectangular touch panel, the rectangular touch panel has M first electrodes and M*N groups of second electrodes to provide sensing areas of M rows and N columns, and M and N are both positive integers , characterized in that: each of the first electrodes corresponds to N groups of the second electrodes and has a plurality of pairs of lateral branches, wherein each group of the second electrodes has a left pattern electrode and a right pattern electrode for A plurality of pairs of lateral branches in a sensing region are surrounded by complementary shapes, and one sensing region in any two adjacent sensing regions of each row is connected with a pair of lateral branches and another The sensing areas are adjacent to each other.

Description

Mutual capacitive touch device, touch display device and electronic equipment using it

The invention relates to a capacitive touch device, in particular to a mutual capacitive touch device which can improve the effect of linear interpolation.

Please refer to FIG. 1 , which shows an electrode distribution diagram of a local area of a conventional mutual capacitive touch panel. As shown in Figure 1, the local area has four driving electrodes 11 and one sensing electrode 12, wherein each driving electrode 11 is comb-shaped, and the sensing electrode 12 is complementary in shape to these driving electrodes 11 to provide 4 a sensing area.

During operation, a driving circuit sequentially transmits a driving signal to each driving electrode 11 , and receives a sensing signal through the sensing electrode 12 to obtain sensing values of the four sensing areas to determine at least one touch point.

In addition, the driving circuit can also perform a linear interpolation calculation on the sensing values of two adjacent sensing areas to increase the touch resolution. However, when the linear interpolation function is used, since the boundary area between any two adjacent sensing regions is only composed of a lateral branch of one driving electrode 11 and a lateral branch of the other driving electrode 11, the sensing electrode 12 is not included. Therefore, the boundary area will become a sensing blind area and affect the effect of linear interpolation.

In order to solve the above problems, there is a great need in the art for a novel touch electrode structure.

The main purpose of the present invention is to disclose a mutual capacitive touch device, which can combine a left pattern electrode and a right pattern electrode in each sensing region by making the strip electrodes corresponding to a plurality of sensing regions have multiple pairs of lateral branches. The electrodes form a vein structure to improve the sensing sensitivity, and a pair of transverse branches are located at the bottom of each sensing area to prevent any two vertically adjacent sensing areas from forming a sensing blind area at the boundary, thereby improving the effect of linear interpolation.

To achieve the above-mentioned purpose, a mutual capacitive touch device is proposed, which has a rectangular touch panel, and the rectangular touch panel has M first electrodes and M*N groups of second electrodes to provide a sensing area of M rows and N columns , M and N are both positive integers, characterized in that:

Each of the first electrodes corresponds to N groups of the second electrodes and has a plurality of pairs of lateral branches, wherein each group of the second electrodes has a left pattern electrode and a right pattern electrode surrounded by a complementary shape Multiple pairs of lateral branches in one sensing area, and one sensing area in any two adjacent sensing areas of each row is adjacent to another sensing area with a pair of lateral branches .

In one embodiment, the first electrodes are sensing electrodes, and the second electrodes are driving electrodes.

In one embodiment, the first electrodes are driving electrodes, and the second electrodes are sensing electrodes.

In one embodiment, the back of the rectangular touch panel has M first signal contacts and N second signal contacts for outputting M sensing signals and receiving N driving signals.

In one embodiment, the back of the rectangular touch panel has M first signal contacts and N second signal contacts for receiving M driving signals and outputting N sensing signals.

In order to achieve the aforementioned purpose, the present invention further proposes a touch display device, which has a rectangular touch panel and a driving circuit for driving the rectangular touch panel, and the rectangular touch panel has M first electrodes and M*N groups of first electrodes. Two electrodes provide the sensing area of M rows and N columns, M and N are both positive integers, characterized in that:

Each of the first electrodes corresponds to N groups of the second electrodes and has a plurality of pairs of lateral branches, wherein each group of the second electrodes has a left pattern electrode and a right pattern electrode surrounded by a complementary shape Multiple pairs of lateral branches in one sensing area, and one sensing area in any two adjacent sensing areas of each row is adjacent to another sensing area with a pair of lateral branches .

In one embodiment, the first electrodes are sensing electrodes, and the second electrodes are driving electrodes.

In one embodiment, the first electrodes are driving electrodes, and the second electrodes are sensing electrodes.

In one embodiment, the back of the rectangular touch panel has M first signal contacts and N second signal contacts for outputting M sensing signals and receiving N driving signals.

In one embodiment, the back of the rectangular touch panel has M first signal contacts and N second signal contacts for receiving M driving signals and outputting N sensing signals.

In one embodiment, the touch display device has a display module to form a touch screen with the rectangular touch panel.

In a possible embodiment, the display module can be a liquid crystal display module, a mini light emitting diode display module, a micro light emitting diode display module, a quantum dot light emitting diode display module or An organic light emitting diode display module.

To achieve the aforementioned purpose, the present invention further proposes an electronic device having a central processing unit and the aforementioned touch display device, wherein the central processing unit is used for communicating with the driving circuit.

In a possible embodiment, the electronic device may be a smart phone, a portable computer, a vehicle computer or an access control device.

In order to enable your review committee to further understand the structure, characteristics and purpose of the present invention, the drawings and detailed descriptions of preferred embodiments are hereby attached.

Please refer to FIG. 2 , which is a schematic diagram of an embodiment of a mutual capacitive touch device of the present invention. As shown in FIG. 2 , a mutual capacitive touch device 100 includes a rectangular touch panel 110 and a driving circuit 120 for driving the rectangular touch panel 110, wherein the rectangular touch panel 110 has M first electrodes 111 and M*N sets of second electrodes provide sensing areas of M rows and N columns, M and N are both positive integers, and each set of second electrodes has a left pattern electrode 112a and a right pattern electrode 112b. That is, each sensing area includes a left pattern electrode 112 a , a right pattern electrode 112 b and a part of the first electrode 111 .

Each of the first electrodes 111 corresponds to N groups of the second electrodes and has a plurality of pairs of lateral branches (111a, 111b), wherein each group of the second electrodes is connected by the left pattern electrode 112a and the right pattern electrode 112b surrounds a plurality of pairs of lateral branches (111a, 111b) in a sensing area in a complementary shape, and one of the sensing areas in any two adjacent sensing areas of each row is bounded by a pair of the sensing areas. Said lateral branch (111a, 111b) is adjacent to another said sensing area.

In this embodiment, the first electrodes 111 are sensing electrodes and the second electrodes (112a, 112b) are driving electrodes, and the back of the rectangular touch panel 110 has M first signal contacts A ₁ -A The _M and N second signal contacts B ₁ -B _N are used to output M sensing signals RX ₁ -RX _M and receive N driving signals TX ₁ -TX _N .

In this embodiment, although the first electrodes 111 are sensing electrodes and the second electrodes (112a, 112b) are driving electrodes, in possible variant embodiments, their roles can also be reversed, so that the The first electrodes 111 are driving electrodes and the second electrodes (112a, 112b) are sensing electrodes. When the first electrodes 111 are driving electrodes and the second electrodes (112a, 112b) are sensing electrodes, the M first signal contacts and N second signal contacts are used to receive M Drive signals and output N induction signals.

According to the above-mentioned design, the present invention can prevent any two vertically adjacent sensing areas from generating a sensing blind area at the boundary, thereby improving the effect of linear interpolation.

According to the above description, the present invention further provides a touch display device. Please refer to FIG. 3 , which shows a block diagram of an embodiment of the touch display device of the present invention. As shown in FIG. 3 , a touch display device 200 has a touch display driving circuit 210 and a touch screen 220, wherein the touch screen 220 includes a rectangular touch panel 110, and the touch display driving circuit 210 includes a The driving circuit 120 . In addition, the display module of the touch screen 220 can be a liquid crystal display module, a mini LED display module, a micro LED display module, a quantum dot LED display module or a Organic light emitting diode display module.

According to the above description, the present invention further provides an electronic device. Please refer to FIG. 4 , which shows a block diagram of an embodiment of the electronic device of the present invention. As shown in FIG. 4 , an electronic device 300 has a central processing unit 310 and a touch display device 320, wherein the touch display device 320 is realized by the touch display device 200, and the central processing unit 310 is used to communicate with the touch display device. Control the display driver circuit 210 to communicate.

In addition, the electronic device 300 can be a smart phone, a portable computer, a vehicle computer or an access control device.

With the design disclosed above, the mutual capacitive touch device of the present invention can provide the following effects:

The mutual capacitive touch device of the present invention can form a vein structure with a left pattern electrode and a right pattern electrode in each sensing region by making the strip electrodes corresponding to a plurality of sensing regions have multiple pairs of lateral branches to improve Sensing sensitivity, and making a pair of horizontal branches located at the lower end of each sensing area prevents any two vertically adjacent sensing areas from forming a sensing blind area at the boundary, thereby improving the effect of linear interpolation and optimizing the touch experience.

What is disclosed in this case is a preferred embodiment. For example, any partial changes or modifications derived from the technical ideas of this case and easily deduced by those who are familiar with the technology are within the scope of the patent right of this case.

To sum up, this case, no matter the purpose, means or efficacy, shows that it is very different from the conventional technology, and its first invention is practical, and indeed meets the requirements of a patent for a new model. I urge your review committee to clearly understand and grant a patent as soon as possible to benefit the society. , is for the Most Prayer.

11: Drive electrodes 12: Induction electrode 100: Mutual capacitive touch device 110: Rectangular touchpad 111: the first electrode 111a: Horizontal branches 111b: Horizontal branch 112a: left pattern electrode 112b: right pattern electrode 120: drive circuit 200: touch display device 210: Touch display drive circuit 220: touch screen 300: Electronic equipment 310: central processing unit 320: touch display device

FIG. 1 is a diagram showing the distribution of electrodes in a local area of a conventional mutual capacitive touch panel.

FIG. 2 is a schematic diagram of an embodiment of a mutual capacitive touch device of the present invention.

FIG. 3 shows a block diagram of an embodiment of the touch display device of the present invention.

FIG. 4 shows a block diagram of an embodiment of the electronic device of the present invention.

100: Mutual capacitive touch device

110: Rectangular touchpad

111: the first electrode

111a: Horizontal branches

111b: Horizontal branch

112a: left pattern electrode

112b: right pattern electrode

120: drive circuit

Claims (11)

A mutual capacitive touch device, which has a rectangular touch panel, the rectangular touch panel has M first electrodes and M*N groups of second electrodes to provide sensing areas of M rows and N columns, and M and N are both positive integers , characterized by: Each of the first electrodes corresponds to N groups of the second electrodes and has a plurality of pairs of lateral branches, wherein each group of the second electrodes has a left pattern electrode and a right pattern electrode surrounded by a complementary shape Multiple pairs of lateral branches in one sensing area, and one sensing area in any two adjacent sensing areas of each row is adjacent to another sensing area with a pair of lateral branches . The mutual capacitive touch device described in item 1 of the scope of the patent application, wherein, the first electrode is a sensing electrode, and the second electrode is a driving electrode; or the first electrode is a driving electrode, and the The second electrode is an induction electrode. The mutual capacitive touch device described in item 1 of the scope of the patent application, wherein, the back of the rectangular touch panel has M first signal contacts and N second signal contacts for outputting M sensing signals and receiving N a drive signal. The mutual capacitive touch device as described in item 1 of the scope of the patent application, wherein, the back of the rectangular touch panel has M first signal contacts and N second signal contacts to receive M driving signals and output N an induction signal. A touch display device, which has a rectangular touch panel and a drive circuit for driving the rectangular touch panel, the rectangular touch panel has M first electrodes and M*N groups of second electrodes to provide M rows and N columns In the sensing area, M and N are both positive integers, characterized in that: Each of the first electrodes corresponds to N groups of the second electrodes and has a plurality of pairs of lateral branches, wherein each group of the second electrodes has a left pattern electrode and a right pattern electrode surrounded by a complementary shape Multiple pairs of lateral branches in one sensing area, and one sensing area in any two adjacent sensing areas of each row is adjacent to another sensing area with a pair of lateral branches . The touch display device described in item 5 of the scope of patent application, wherein, the first electrode is a sensing electrode, and the second electrode is a driving electrode; or the first electrode is a driving electrode, and the first electrode is a driving electrode. The two electrodes are sensing electrodes. The touch display device as described in item 5 of the scope of the patent application, wherein the back of the rectangular touch panel has M first signal contacts and N second signal contacts for outputting M sensing signals and receiving N driving signals Signal. The touch display device as described in item 5 of the scope of the patent application, wherein, the back of the rectangular touch panel has M first signal contacts and N second signal contacts to receive M driving signals and output N sensing Signal. The touch display device as described in item 5 of the scope of the patent application has a display module to form a touch screen with the rectangular touch panel, wherein the display module is composed of a liquid crystal display module, a mini light emitting A display module selected from the group consisting of a diode display module, a micro light emitting diode display module, a quantum dot light emitting diode display module and an organic light emitting diode display module. An electronic device, which has a central processing unit and the touch display device described in any one of items 5 to 9 of the scope of the patent application, wherein the central processing unit is used to communicate with the driving circuit. The electronic device described in item 10 of the scope of the patent application is an electronic device selected from a group consisting of a smart phone, a portable computer, a vehicle computer and an access control device.

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