TW202024875A - Touch sensing method, touch display device and information processing apparatus capable of outputting a driving signal by virtue of a driving unit so as to alternately drive Y electrode driving wires - Google Patents

Abstract

Disclosed is a touch sensing method, including: outputting a driving signal by virtue of a driving unit so as to alternately drive Y electrode driving wires; coupling X*Y first connecting ends of a sensing signal transmission unit to X*Y electrode sensing wires, coupling a sensing compensation end to the driving signal, and making X groups of multitask circuits form a connection group state during a driving period, so as to connect X of the electrode sensing wires connected with X scanned touch sensing components to X corresponding connecting ends in X*Y second connecting ends, and connect the driving signal to X*(Y-1) of the first connecting ends; and coupling X*Y channel input ends of a channel selection unit to X*Y of the second connecting ends so as to connect X of the corresponding connecting ends to X channel output ends of the channel selection unit during a driving period.

Description

Touch sensing method, touch display device and information processing device

The present invention relates to a touch sensing method, in particular to a touch sensing method capable of reducing parasitic capacitance effects.

In order to make portable touch electronic devices thinner, an in-cell touch display panel that includes a display module and a touch module at the same time has been developed and has been widely used Among various portable touch electronic devices nowadays. FIG. 1 shows a partial structure diagram of a conventional in-cell touch display panel. As shown in Figure 1, the in-cell touch display panel includes multiple gate drive lines 11, multiple source drive lines 12, multiple thin film transistors 13, multiple pixel units 14, and X×Y A touch sensor array, a plurality of electrode driving lines 16 and a plurality of electrode sensing lines 17 are formed by the touch sensor element 15. It can be seen from FIG. 1 that the touch sensing elements 15 in column X are electrically connected to X×Y electrode sensing lines 17 respectively, and the touch sensing elements 15 in row Y are electrically connected to Y electrode driving lines 16 respectively. connection. It is conceivable that if the electrode sensing line 17 of each touch sensing element 15 is electrically connected to a sensing circuit unit or chip, it will occupy a lot of area of the touch module, which is disadvantageous to a narrow frame design.

In addition, during the operation of the in-cell touch display panel, as shown in FIG. 1, a first parasitic capacitance 101 is formed between each of the electrode driving lines 16 and each of the gate driving lines 11. A second parasitic capacitance 102 is formed between each of the electrode driving lines 16 and each of the source driving lines 12, and a second parasitic capacitance 102 is formed between each of the touch sensing elements 15 and each of the electrode driving lines 16 Three parasitic capacitances 103, and a fourth parasitic capacitance 104 is formed between each of the touch sensing elements 15 and each of the electrode sensing lines 17, and these parasitic capacitances will affect the sensitivity and sensitivity of capacitive touch sensing. Reliability.

In order to reduce the influence of parasitic capacitance, Chinese Patent Publication No. CN106557198A discloses a full-drive method whose working principle is:

During the touch sensing period, pulse signals of the same phase, same frequency and same amplitude are provided to the gate drive line, source drive line and electrode drive line. Among them, the pulse signal (or excitation signal) is mainly used for driving A touch sensing element. Theoretically, when the potential changes at both ends of a parasitic capacitance are exactly the same, the influence of the parasitic capacitance on a touch sensing operation can be ignored (eliminated).

However, as shown in FIG. 1, the full driving method cannot eliminate the parasitic capacitance of a first sensing unit 151 and a parasitic capacitance of a second sensing unit formed between two adjacent touch sensing elements 15 152.

Therefore, a novel touch sensing solution is urgently needed in the art.

An object of the present invention is to provide a touch sensing method, which can greatly reduce the number of circuit traces between a control chip and a touch display panel and greatly reduce the number of pins of the control chip through a multiplex connection circuit At the same time, a signal compensation mechanism is used to reduce the parasitic capacitance effect between adjacent sensing units, thereby providing a sensitive and reliable touch sensing effect.

Another object of the present invention is to provide a touch display device, which can greatly reduce the number of circuit traces between a control chip and a touch display panel and greatly reduce the number of pins of the control chip through a multiplex connection circuit At the same time, a signal compensation mechanism is used to reduce the parasitic capacitance effect between adjacent sensing units, thereby providing a sensitive and reliable touch sensing effect.

Another object of the present invention is to provide an information processing device that can reduce the parasitic capacitance effect between adjacent sensing units through a signal compensation mechanism of a touch display device, thereby providing a good touch sensing effect.

To achieve the above objective, a touch sensing method is proposed to perform touch sensing on a touch panel, wherein the touch panel has X×Y touch sensing elements, Y electrode driving lines, and X × Y electrode sensing lines, wherein X × Y touch sensing elements are arranged in an X column and Y row touch sensor array, and Y of the electrode driving lines are connected to the Y row of the touch sensor array. The control sensing element is coupled, and X×Y electrode sensing lines are coupled to X×Y touch sensing elements, X and Y are both integers greater than 1, and the touch sensing method includes The following steps:

(1) Utilize a driving unit to output a driving signal to alternately drive Y of the electrode driving lines, so as to drive X corresponding to X in a row of X×Y touch sensing elements during each driving period Touch sensing element;

(2) Utilizing X×Y first connection terminals of a sensing signal transmission unit to couple X×Y electrode sensing lines, and a sensing compensation terminal to couple the driving signal, and a driving period , Making the X groups of multiplex circuits of the sensing signal transmission unit form a connection configuration, so that the X electrode sensing lines connected to the X corresponding touch sensing elements are connected to the sensing signal transmission unit X corresponding connection terminals of the X×Y second connection terminals of, and connecting the drive signal to X×(Y-1) said first connection terminals; and

(3) Utilize the X×Y channel input terminals of a channel selection unit to couple the X×Y second connection terminals of the sensing signal transmission unit, so as to combine the X×Y channels in a driving period. The X corresponding connection terminals in the second connection terminals are connected to the X channel output terminals of the channel selection unit.

In an embodiment, the channel selection unit has X multiplexers, and each of the multiplexers has Y input terminals coupled to Y of the channel input terminals, and one output terminal and one channel The output terminal is coupled.

In an embodiment, the X channel output ends of the channel selection unit are used to couple with a processor.

In one embodiment, the touch panel is an in-cell touch display panel.

In order to achieve the above objective, the present invention further provides a touch display device, which has a touch display panel and a control circuit for driving the touch display panel, wherein the control circuit has a driving unit and a sensing signal Transmission unit, a channel selection unit and a processor; the touch display panel has X×Y touch sensing elements, Y electrode driving lines, and X×Y electrode sensing lines, wherein X×Y The touch sensing elements are arranged in an X column and Y row touch sensor array, Y of the electrode driving lines are coupled to the Y row of the touch sensing elements, and X×Y of the electrodes The sensing line is coupled to the X×Y touch sensing elements, X and Y are integers greater than 1, and the control circuit is used to execute a touch sensing method, which includes the following steps:

(1) Utilize the driving unit to output a driving signal to alternately drive the Y electrode driving lines, so as to drive X corresponding to X in a row of X×Y touch sensing elements during each driving period Touch sensing element;

(2) Use the X×Y first connection terminals of the sensing signal transmission unit to couple X×Y electrode sensing lines, and a sensing compensation terminal to couple the driving signal, and in a driving period , Making the X groups of multiplex circuits of the sensing signal transmission unit form a connection configuration, so that the X electrode sensing lines connected to the X corresponding touch sensing elements are connected to the sensing signal transmission unit X corresponding connection terminals of the X×Y second connection terminals of, and connecting the drive signal to X×(Y-1) said first connection terminals; and

(3) Use the X×Y channel input ends of the channel selection unit to couple the X×Y second connection ends of the sensing signal transmission unit, so that the X×Y channel input ends can be The X corresponding connection terminals of the second connection terminals are connected to the X channel output terminals of the channel selection unit to provide touch sensing information to the processor.

In an embodiment, the channel selection unit has X multiplexers, and each of the multiplexers has Y input terminals coupled to Y of the channel input terminals, and one output terminal and one channel The output terminal is coupled.

In one embodiment, the touch panel is an in-cell touch display panel.

In one embodiment, the in-cell touch display panel is an active matrix organic light-emitting diode in-cell touch display panel.

In addition, the present invention further provides an information processing device having a central processing unit and the aforementioned touch display device, wherein the central processing unit is coupled to the processor to receive the touch sensing information.

In possible embodiments, the information processing device may be a smart phone, a tablet computer, a notebook computer, an all-in-one computer, or a smart watch.

In order to enable your reviewer to further understand the structure, features, purpose, and extreme advantages of the present invention, drawings and detailed descriptions of preferred specific embodiments are attached as follows.

Please refer to FIG. 2, which shows a flow chart of an embodiment of the touch sensing method of the present invention, wherein the touch sensing method is used to perform touch sensing on a touch panel, which is more It is preferably an in-cell touch display panel; and the touch panel has X×Y touch sensing elements, Y electrode driving lines, and X×Y electrode sensing lines, and X×Y touch sensors The sensing elements are arranged in an X-column and Y-row touch sensor array, Y of the electrode driving lines are coupled to the Y-row of the touch sensing elements, and X×Y of the electrode sensing lines are It is coupled to X×Y touch sensing elements, and X and Y are both integers greater than 1.

As shown in FIG. 2, the touch sensing method includes the following steps: Utilize a driving unit to output a driving signal to alternately drive Y of the electrode driving lines, so as to drive positions in X×Y positions during each driving period. X corresponding touch sensing elements in a row of the touch sensing element (step a); using X×Y first connection ends of a sensing signal transmission unit to couple X×Y electrode sensing lines , And a sensing compensation terminal is coupled to the driving signal, and in a driving period, the X groups of multiplex circuits of the sensing signal transmission unit form a connection configuration, so that the corresponding touch The X electrode sensing lines connected to the sensing element are connected to X corresponding connection ends of the X×Y second connection ends of the sensing signal transmission unit, and the driving signal is connected to X×(Y-1 ) The first connection terminals (step b); and use the X×Y channel input terminals of a channel selection unit to couple the X×Y second connection terminals of the sensing signal transmission unit to one During the driving period, the X corresponding connection terminals of the X×Y second connection terminals are connected to the X channel output terminals of the channel selection unit (step c).

In step c, the channel selection unit may have X multiplexers, and each of the multiplexers has Y input terminals that are coupled to the Y channel input terminals, and one output terminal and one channel The output terminal is coupled, and the X channel output terminals of the channel selection unit are used for coupling with a processor to provide touch sensing information to the processor.

That is to say, the technical spirit of the present invention is that by forming a connection configuration of X groups of multiplex circuits during a driving period, the sensing signals of X touch sensing elements scanned by a driving signal are transmitted to A processor and at the same time connect the driving signal to X×(Y-1) touch sensing elements to greatly reduce the peripheral parasitic capacitance of the touch sensing element being scanned. In other words, according to the technical solution of the present invention, not only can the number of circuit traces between a control chip and a touch display panel be greatly reduced and the number of pins of the control chip can be greatly reduced, but also the touch sensing can be greatly improved at the same time. The sensitivity and reliability.

Based on the above principle 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 2 has a touch display panel 21 and a control circuit for driving the touch display panel 21. The touch display panel 21 may be an in-cell touch display panel. For example, but not limited to, an active matrix organic light emitting diode (AMOLED) in-cell touch display panel; the control circuit has a driving unit 22, a sensing signal transmission unit 23, and a channel The selection unit 24 and a processor 25; the touch display panel 21 has X×Y touch sensing elements 210, Y electrode driving lines 212, and X×Y electrode sensing lines 211, of which X×Y touch The sensing elements 210 are arranged in an X-column and Y-row touch sensor array, Y electrode driving lines 212 are coupled with Y-row touch sensing elements 210, and X×Y electrode sensing lines 211 are connected to X×Y touch sensing elements 210 are coupled, X and Y are both integers greater than 1; and the control circuit is used to execute a touch sensing method, which includes the following steps:

(1) Utilizing the driving unit 22 to output a driving signal VSTIM to alternately drive the Y electrode driving lines 212 to drive X corresponding touches in a row of X×Y touch sensing elements 210 during each driving period. Control sensing element;

(2) Use the X×Y first connection terminals of the sensing signal transmission unit 23 to couple the X×Y electrode sensing lines 211, and a sensing compensation terminal to couple the driving signal VSTIM, and during a driving period, Make the X sets of multiplex circuits of the sensing signal transmission unit 23 (each set of multiplex circuits include Y multiplexers 231) to form a connection configuration, so that the X connected to the X corresponding touch sensing elements One electrode sensing line 211 is connected to X corresponding connection terminals of the X×Y second connection terminals of the sensing signal transmission unit 23, and the driving signal VSTIM is connected to X×(Y-1) said first connection terminals. Connection end; and

(3) The X×Y channel input ends of the channel selection unit 24 are used to couple the X×Y second connection ends of the sensing signal transmission unit 23, so that the X×Y number of The X corresponding connection terminals of the second connection terminals are connected to the X channel output terminals of the channel selection unit 24 to provide touch sensing information to the processor 25.

In one embodiment, the channel selection unit 24 may have X multiplexers 241, and each multiplexer 241 has Y input terminals coupled to the Y channel input terminals, and one output terminal is coupled to one of the The channel output terminal is coupled.

Accordingly, not only can the number of circuit traces between the processor 25 and the touch display panel 21 be greatly reduced and the number of pins of the processor 25 can be greatly reduced, but the sensitivity and reliability of touch sensing can also be greatly improved.

Based on the above description, the present invention further provides an information processing device. Please refer to FIG. 4, which shows a block diagram of an embodiment of the information processing device of the present invention. As shown in FIG. 4, an information processing device 100, which can be a smart phone, a tablet computer, a notebook computer, an all-in-one computer, or a smart watch, has a central processing unit 110 and a touch display device 120. The control display device 120 is implemented by the touch display device 2 of FIG. 3, and the central processing unit 110 is coupled to the processor 25 to receive the touch sensing information.

In this way, the above has completely and clearly explained the method, principle and technical solution of the present invention; and from the above, it can be seen that the present invention has the following advantages:

(1) The touch sensing method of the present invention can greatly reduce the number of circuit traces between a control chip and a touch display panel and the number of pins of the control chip through a multiplex connection circuit.

(2) The touch sensing method of the present invention can reduce the parasitic capacitance effect between adjacent sensing units through a signal compensation mechanism, thereby providing a sensitive and reliable touch sensing effect.

It must be emphasized that the foregoing disclosures in this case are preferred embodiments, and any partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by those who are familiar with the art will not deviate from the patent of this case. Right category.

In summary, regardless of the purpose, means and effect of this case, it is shown that it is very different from the conventional technology, and its first invention is suitable for practicality, and it does meet the patent requirements of the invention. I sincerely ask the examiner to check it out and grant the patent as soon as possible. Society is for the best prayer.

<The present invention> Step a: Utilize a driving unit to output a driving signal to alternately drive the Y electrode driving lines, so as to drive X corresponding to X in a row of X×Y touch sensing elements during each driving period Touch sensing element Step b: Utilize X×Y first connection terminals of a sensing signal transmission unit to couple X×Y electrode sensing lines, and a sensing compensation terminal to couple the driving signal, and a driving period , Making the X groups of multiplex circuits of the sensing signal transmission unit form a connection configuration, so that the X electrode sensing lines connected to the X corresponding touch sensing elements are connected to the sensing signal transmission unit X corresponding connection ends of the X×Y second connection ends of, and the drive signal is connected to X×(Y-1) said first connection ends Step c: Utilize the X×Y channel input ends of a channel selection unit to couple the X×Y second connection ends of the sensing signal transmission unit, so as to transfer the X×Y channels in a driving period. X of the second connection terminals are connected to the X channel output terminals of the channel selection unit 2: Touch display device 21: Touch display panel 22: drive unit 23: Sensing signal transmission unit 24: Channel selection unit 25: processor 100: Information processing device 110: Central Processing Unit 120: Touch display device 210: Touch sensor 211: Electrode sensing line 212: Electrode drive line 231: Multiplexer 241: Multiplexer

＜Acquaintances＞ 11: Gate drive line 12: Source drive line 13: Thin film transistor 14: pixel unit 15: Touch sensor components 16: Electrode drive line 17: Electrode sensing line 101: The first parasitic capacitance 102: second parasitic capacitance 103: third parasitic capacitance 104: Fourth parasitic capacitance 151: Parasitic capacitance of the first sensing unit 152: Parasitic capacitance of the second sensing unit

FIG. 1 shows a partial structure diagram of a conventional in-cell touch display panel. Fig. 2 shows a flowchart of an embodiment of the touch sensing method 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 information processing device of the present invention.

Step a: Utilize a driving unit to output a driving signal to alternately drive the Y electrode driving lines, so as to drive X corresponding to X in a row of X×Y touch sensing elements during each driving period Touch sensing element

Step b: Utilize X×Y first connection terminals of a sensing signal transmission unit to couple X×Y electrode sensing lines, and a sensing compensation terminal to couple the driving signal, and a driving period , Making the X groups of multiplex circuits of the sensing signal transmission unit form a connection configuration, so that the X electrode sensing lines connected to the X corresponding touch sensing elements are connected to the sensing signal transmission unit X corresponding connection ends of the X×Y second connection ends of, and the drive signal is connected to X×(Y-1) said first connection ends

Step c: Utilize the X×Y channel input ends of a channel selection unit to couple the X×Y second connection ends of the sensing signal transmission unit, so as to transfer the X×Y channels in a driving period. X of the second connection terminals are connected to the X channel output terminals of the channel selection unit

Claims (10)

A touch sensing method for performing touch sensing on a touch panel, wherein the touch panel has X×Y touch sensing elements, Y electrode driving lines, and X×Y electrode sensing lines , Wherein, X×Y touch sensor elements are arranged into a touch sensor array with X columns and Y rows, and Y electrode driving lines are coupled to Y rows of touch sensor elements , And X×Y electrode sensing lines are coupled to X×Y touch sensing elements, X and Y are both integers greater than 1, and the touch sensing method includes the following steps: (1) Utilize a driving unit to output a driving signal to alternately drive Y of the electrode driving lines, so as to drive X corresponding touch sensors in a row of X×Y touch sensing elements during each driving period (2) Utilize X×Y first connection terminals of a sensing signal transmission unit to couple X×Y electrode sensing lines, and a sensing compensation terminal to couple the driving signal, and a During the driving period, the X groups of multiplex circuits of the sensing signal transmission unit are formed into a connection configuration, so that the X electrode sensing lines connected to the X corresponding touch sensing elements are connected to the sensing X corresponding connection terminals among the X×Y second connection terminals of the signal transmission unit, and connect the drive signal to the X×(Y-1) first connection terminals; and (3) Use one channel to select The X×Y channel input ends of the unit are coupled to the X×Y second connection ends of the sensing signal transmission unit, so that during a driving period, the X×Y second connection ends The X corresponding connection terminals are connected to the X channel output terminals of the channel selection unit. According to the touch sensing method described in claim 1, wherein the channel selection unit has X multiplexers, and each of the multiplexers has Y input terminals and Y channel input terminals Is coupled, and an output terminal is coupled to a channel output terminal. The touch sensing method according to the scope of patent application, wherein the X channel output terminals of the channel selection unit are used for coupling with a processor. According to the touch sensing method described in the scope of the patent application, the touch panel is an in-cell touch display panel. A touch display device has a touch display panel and a control circuit for driving the touch display panel, wherein the control circuit has a driving unit, a sensing signal transmission unit, a channel selection unit and a processing The touch display panel has X×Y touch sensing elements, Y electrode drive lines, and X×Y electrode sensing lines, wherein X×Y touch sensing elements are arranged into an X Column Y row of the touch sensor array, Y of the electrode driving lines are coupled to the Y row of the touch sensing elements, and X×Y of the electrode sensing lines and X×Y of the The touch sensing element is coupled, X and Y are integers greater than 1; and the control circuit is used to implement a touch sensing method, which includes the following steps: (1) Utilize the driving unit to output a driving signal to Alternately drive Y of the electrode driving lines to drive X corresponding touch sensing elements in a row of X×Y touch sensing elements during each driving period; (2) Use this sense The X×Y first connection ends of the signal transmission unit are coupled to the X×Y electrode sensing lines, and a sensing compensation end is coupled to the driving signal, and during the driving period, the sensing signal The X groups of multiplex circuits of the transmission unit form a connection configuration, so that the X electrode sensing lines connected to the X corresponding touch sensing elements are connected to the X×Yth electrode sensing lines of the sensing signal transmission unit. X corresponding connection terminals of the two connection terminals, and connect the drive signal to X×(Y-1) said first connection terminals; and (3) Use the X×Y channel input terminals of the channel selection unit The X×Y second connection terminals of the sensing signal transmission unit are coupled to connect X of the X×Y second connection terminals to the The X channel output terminals of the channel selection unit provide touch sensing information to the processor. The touch display device according to item 5 of the scope of patent application, wherein the channel selection unit has X multiplexers, and each of the multiplexers has Y input terminals coupled with Y channel input terminals And an output terminal is coupled to one of the channel output terminals. According to the touch display device described in claim 5, the touch display panel is an in-cell touch display panel. According to the touch display device described in claim 7, wherein the in-cell touch display panel is an active matrix organic light-emitting diode in-cell touch display panel. An information processing device, which has a central processing unit and the touch display device as described in any one of items 5-8 of the scope of patent application, wherein the central processing unit is coupled to the processor to receive the Of touch sensing information. The information processing device described in item 9 of the scope of patent application is a device selected by the group consisting of smart phones, tablet computers, notebook computers, all-in-one computers, and smart watches.

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