TWI728788B - Touch apparatus, touch driving device and operation method thereof - Google Patents

Abstract

A touch apparatus, a touch driving device and an operation method are provided. The touch driving device includes a first routing circuit, a second routing circuit, and a processing circuit. The first routing circuit connects a first current electrode of first sensing electrodes to a first common terminal of the first routing circuit. The second routing circuit connects a second current electrode of second sensing electrodes to a second common terminal of the second routing circuit. The same input terminal of the processing circuit is coupled to the first common terminal and the second common terminal. In the case where a touch sensing result corresponding to the input terminal indicates that a touch event has occurred, the processing circuit checks whether the touch event also occurs on an adjacent sensing electrode adjacent to the first current electrode to determine whether the touch event occurs on the first current electrode.

Description

Touch control equipment, touch control driving device and operation method thereof

The present invention relates to an electronic device, and more particularly to a touch device and a touch drive device and operation method thereof.

Generally speaking, a touch panel has a plurality of sensing electrodes. These sensing electrodes are used to sense touch events. The analog-to-digital converter (ADC) of the processing circuit is used to convert the sensing signals of these sensing electrodes into digital data. In order to reduce the circuit cost, the general processing circuit uses a small number of analog-to-digital converters to process a large number of sensing electrodes in a time division multiplexing manner. For example, assuming that the touch panel has 192 sensing electrodes and the processing circuit has 8 analog-to-digital converters, these 8 analog-to-digital converters need to perform 24 read operations (conversion operations) to transfer the 192 sensing electrodes. The sensing signal of the sensing electrode is converted into digital data. In other words, the 8 analog-to-digital converters take 24 unit times to convert the sensing signals of the 192 sensing electrodes into digital data. Assuming that the touch panel has 192 sensing electrodes and the processing circuit has only one analog-to-digital converter, it takes 192 unit time for the analog-to-digital converter to convert the sensing signals of the 192 sensing electrodes into digital data. Reducing the number of analog-to-digital converters means that the processing time of the processing circuit will be increased.

It should be noted that the content of the "prior art" paragraph is used to help understand the present invention. Part of the content (or all of the content) disclosed in the "Prior Art" paragraph may not be the conventional technology known to those with ordinary knowledge in the technical field. The content disclosed in the "prior art" paragraph does not mean that the content has been known to those with ordinary knowledge in the technical field before the application of the present invention.

The present invention provides a touch device and a touch drive device and operation method thereof, which can reduce the number of times of reading a touch panel when the number of analog-to-digital converters (ADC) is limited ( Or it is possible to reduce the number of analog-to-digital converters when the number of reads to the touch panel is limited).

In an embodiment of the present invention, the above-mentioned touch driving device is suitable for driving a touch panel. The touch driving device includes a first routing circuit, a second routing circuit, and a processing circuit. The plurality of first selection terminals of the first routing circuit are adapted to be coupled to the plurality of first sensing electrodes of the first sub-region of the touch panel. The first routing circuit is configured to select one of the first sensing electrodes as the first current electrode in a first order, and to selectively connect the first current electrode to the first common terminal of the first routing circuit. The plurality of second selection terminals of the second routing circuit are adapted to be coupled to the plurality of second sensing electrodes of the second sub-region of the touch panel. The second routing circuit is configured to select one of the second sensing electrodes as the second current electrode in a second order (different from the first order), and to selectively connect the second current electrode to the second routing circuit The second common end. Wherein, the second common end is coupled to the first common end. The first input terminal of the processing circuit is coupled to the first common terminal and the second common terminal. The first analog-to-digital converter of the processing circuit converts the first touch sensing result corresponding to the first input terminal into the first touch sensing data. In the case that the first touch sensing data indicates that a touch event has occurred, the processing circuit checks whether at least one of the first sensing electrodes adjacent to the first current electrode in the space is also the same. When the touch event occurs, it is determined whether the touch event occurs on the first current electrode.

In an embodiment of the present invention, the above-mentioned operation method includes: the first routing circuit selects one of the plurality of first sensing electrodes in the first sub-area of the touch panel as the first current electrode in a first order, And the first current electrode is selectively connected to the first common terminal of the first routing circuit; the second routing circuit starts from the second sub-area of the touch panel in a second order (different from the first order). One of the two sensing electrodes is selected as the second current electrode, and the second current electrode is selectively connected to the second common terminal of the second routing circuit, wherein the second common terminal and the first common terminal are commonly coupled to the processing circuit The first input terminal of the processing circuit; the first touch sensing result corresponding to the first input terminal is converted into the first touch sensing data by the first analog-to-digital converter of the processing circuit; and the first touch sensing data represents In the case of a touch event, the processing circuit checks whether the touch event also occurs in at least one of the first sensing electrodes adjacent to the first current electrode in the space. Whether the touch event occurs on the first current electrode.

In an embodiment of the present invention, the aforementioned touch device includes a touch panel, a first routing circuit, a second routing circuit, and a processing circuit. The plurality of first selection terminals of the first routing circuit are coupled to the plurality of first sensing electrodes of the first sub-region of the touch panel. The first routing circuit is configured to select one of the first sensing electrodes as the first current electrode in a first order, and to selectively connect the first current electrode to the first common terminal of the first routing circuit. The plurality of second selection terminals of the second routing circuit are coupled to the plurality of second sensing electrodes of the second sub-area of the touch panel. The second routing circuit is configured to select one of the second sensing electrodes as the second current electrode in a second order (different from the first order), and to selectively connect the second current electrode to the second routing circuit The second common end. Wherein, the second common end is coupled to the first common end. The first input terminal of the processing circuit is coupled to the first common terminal and the second common terminal. The first analog-to-digital converter of the processing circuit converts the first touch sensing result corresponding to the first input terminal into the first touch sensing data. In the case that the first touch sensing data indicates that a touch event has occurred, the processing circuit checks whether at least one of the first sensing electrodes adjacent to the first current electrode in the space is also the same. When the touch event occurs, it is determined whether the touch event occurs on the first current electrode.

Based on the above, the touch device and the touch drive device and operation method thereof according to the embodiments of the present invention can divide the touch panel into a plurality of sub-areas, such as a first sub-areas and a second sub-areas. In one reading of the touch panel by the processing circuit, the first routing circuit selects a sensing electrode (the first current electrode) from the first sub-area in the first order, and the second routing circuit in the second order (Different from the first order) Select a sensing electrode (second current electrode) from the second sub-area. The first routing circuit and the second routing circuit short-circuit (electrically connect) the first current electrode and the second current electrode. At the same time (in one reading of the touch panel by the processing circuit), an identical analog-to-digital converter in the processing circuit can be obtained (read out) by the first routing circuit and the second routing circuit. The first touch sensing result of the first current electrode and the second current electrode. Therefore, when the number of analog-to-digital converters is limited, the touch drive device can reduce the number of readings of the touch panel (or can reduce the number of readings of the touch panel when the number of readings of the touch panel is limited). The number of converters).

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

The term "coupling (or connection)" used in the full text of the description of this case (including the scope of the patent application) can refer to any direct or indirect connection means. For example, if the text describes that the first device is coupled (or connected) to the second device, it should be interpreted as that the first device can be directly connected to the second device, or the first device can be connected through other devices or some This kind of connection means is indirectly connected to the second device. The terms "first" and "second" mentioned in the full text of the description of this case (including the scope of the patent application) are used to name the element (element), or to distinguish different embodiments or ranges, and are not used to limit the number of elements The upper or lower limit of is not used to limit the order of components. In addition, wherever possible, elements/components/steps with the same reference numbers in the drawings and embodiments represent the same or similar parts. Elements/components/steps that use the same reference numerals or use the same terms in different embodiments may refer to related descriptions.

FIG. 1 is a schematic diagram of a circuit block of a touch device 100 according to an embodiment of the present invention. The touch device 100 shown in FIG. 1 includes a touch panel 110 and a touch driving device 120. The touch panel 110 has a plurality of sensing electrodes (ie, a sensing electrode array), and the sensing electrodes can be divided into a plurality of sub-areas according to design requirements, such as the sub-areas 111 and the sub-areas 112 shown in FIG. 1. It should be noted that the number of the multiple sub-regions can be determined according to design requirements, and the number of sensing electrodes in any one of the multiple sub-regions can also be determined according to design requirements. In addition, the geometric shapes of the multiple sub-regions can also be determined according to design requirements.

This embodiment does not limit the implementation and details of the touch panel 110. For example, in some embodiments, the touch panel 110 may be an in-cell touch display panel or other touch panels. Among them, in some embodiments, the common voltage electrode of the in-cell touch display panel can be divided into a plurality of sub-electrodes, and these sub-electrodes can be used as the sub-region 111 and the sub-region 112. Sensing electrode.

The touch driving device 120 is suitable for driving the touch panel 110. In the embodiment shown in FIG. 1, the touch driving device 120 includes a plurality of routing circuits, such as the routing circuit 121 and the routing circuit 122 shown in FIG. 1. The routing circuit 121 has a plurality of selection terminals, and these selection terminals are suitable for coupling to a plurality of sensing electrodes of the sub-region 111 of the touch panel 110. The routing circuit 121 has at least one common terminal, such as the common terminal TC1a and the common terminal TC1b shown in FIG. 1. The number of the at least one common terminal of the routing circuit 121 can be determined according to design requirements. The routing circuit 122 has a plurality of selection terminals, and these selection terminals are suitable for coupling to a plurality of sensing electrodes of the sub-region 112 of the touch panel 110. The routing circuit 122 has at least one common terminal, such as the common terminal TC2a and the common terminal TC2b shown in FIG. 1. The number of the at least one common terminal of the routing circuit 122 can be determined according to design requirements. The at least one common terminal of the routing circuit 122 is coupled to the at least one common terminal of the routing circuit 121 in a one-to-one manner. For example, the common terminal TC2a is coupled to the common terminal TC1a, and the common terminal TC2b is coupled to the common terminal TC1b.

In the embodiment shown in FIG. 1, the touch driving device 120 further includes a processing circuit 123. The processing circuit 123 has at least one input terminal, such as the input terminal INa and the input terminal INb shown in FIG. 1. The number of the at least one input terminal of the processing circuit 123 can be determined according to design requirements. The at least one input terminal of the processing circuit 123 is coupled to the at least one common terminal of the routing circuit 121 (or the routing circuit 122) in a one-to-one manner. For example, the input terminal INa of the processing circuit 123 is coupled to the common terminal TC1a of the routing circuit 121 and the common terminal TC2a of the routing circuit 122, and the input terminal INb of the processing circuit 123 is coupled to the common terminal TC1b of the routing circuit 121 and the routing circuit. The common terminal TC2b of the circuit 122.

FIG. 2 is a schematic flowchart illustrating an operation method of the touch driving device 120 according to an embodiment of the present invention. Please refer to Figure 1 and Figure 2. The routing circuit 121 is configured to select one of the sensing electrodes of the sub-region 111 as the first current electrode in a first order, and to selectively connect the first current electrode to the common terminal TC1a of the routing circuit 121 ( Step S210). The first order can be determined according to design requirements. The routing circuit 122 is configured to select one of the sensing electrodes of the sub-region 112 as the second current electrode in a second order (different from the first order), and to selectively connect the second current electrode To the common terminal TC2a of the routing circuit 122 (step S220). The second order can be determined according to design requirements.

Step S210 and step S220 may be performed in the same time interval. For example, step S210 and step S220 may be performed in a cycle in which an analog-to-digital converter (ADC) of the processing circuit 123 performs a reading operation (conversion operation). In some embodiments, step S210 and step S220 may be performed simultaneously.

In the case that the routing circuit 121 has multiple common terminals, the routing circuit 121 selects another (or other) from these sensing electrodes of the sub-region 111 in the first order, and then transfers the other (or other) ) The sensing electrodes are selectively connected to the other common terminals of the routing circuit 121 in a one-to-one manner. For example, the routing circuit 121 selects another of the sensing electrodes of the sub-region 111 as the third current electrode in the first order, and selectively connects the third current electrode to the common electrode of the routing circuit 121 End TC1b.

In the case that the routing circuit 122 has multiple common terminals, the routing circuit 122 selects another (or other) from these sensing electrodes of the sub-region 112 in the second order, and then transfers the other (or other) ) The sensing electrodes are selectively connected to other common terminals of the routing circuit 122 in a one-to-one manner. For example, the routing circuit 122 selects another of the sensing electrodes of the sub-region 112 as the fourth current electrode in the second order, and selectively connects the fourth current electrode to the common electrode of the routing circuit 122 End TC2b.

In the embodiment shown in FIG. 1, the processing circuit 123 includes at least one analog-to-digital converter (ADC), such as the analog-to-digital converter ADCa and the analog-to-digital converter ADCb shown in FIG. 1. It should be noted that the number of the at least one analog-to-digital converter can be determined according to design requirements. Generally speaking, the number of the at least one analog-to-digital converter may be less than the number of sensing electrodes of the touch panel 110.

The analog front end (AFE) circuit (not shown in FIG. 1) of the processing circuit 123 can provide the touch sensing result corresponding to the input terminal INa to the analog-to-digital converter ADCa of the processing circuit 123. The analog-to-digital converter ADCa can convert the touch sensing result corresponding to the input terminal INa into the first touch sensing data (step S230). In the case that the processing circuit 123 has multiple analog-to-digital converters, the analog front-end circuit can provide touch sensing results corresponding to other input terminals of the processing circuit 123 to other analog-to-digital converters of the processing circuit 123. For example, the analog front-end circuit may also provide the touch sensing result corresponding to the input terminal INb to the analog-to-digital converter ADCb of the processing circuit 123, and then the analog-to-digital converter ADCb may convert the touch corresponding to the input terminal INb. The sensing result is converted into the second touch sensing data. The input terminal INb, the analog-to-digital converter ADCb and the second touch sensing data can be deduced by referring to the relevant descriptions of the input terminal INa, the analog-to-digital converter ADCa and the first touch sensing data. Go into details.

The processing circuit 123 can check the first touch sensing data of the analog-to-digital converter ADCa to determine whether the touch event occurred in the first current electrode selected by the routing circuit 121 or all the electrodes selected by the routing circuit 122. Said the second current electrode. In the case where the first touch sensing data indicates that the touch event has occurred, the processing circuit 123 may check the first sensing electrodes in the sub-region 111 adjacent to the first current electrode in space. Whether the touch event also occurs on at least one of the first adjacent sensing electrodes in, to determine whether the first current electrode has a touch event (step S240). Or in other embodiments, the processing circuit 123 may check whether at least one of the second adjacent sensing electrodes in the sub-region 112 adjacent to the second current electrode in the space is also affected. The touch event is used to determine whether the second current electrode has a touch event (step S240).

For example, when the first touch sensing data of the analog-to-digital converter ADCa indicates that the touch event occurs, and the touch event also occurs on the at least one first adjacent sensing electrode In the case of, the processing circuit 123 may determine that the first current electrode selected by the routing circuit 121 has the touch event. Conversely, when the first touch sensing data of the analog-to-digital converter ADCa indicates that the touch event occurs, and when the at least one first adjacent sensing electrode does not occur the touch event Next, the processing circuit 123 can determine that the first current electrode selected by the routing circuit 121 does not have the touch event. In addition, in the case where the first touch sensing data of the analog-to-digital converter ADCa indicates that the touch event has occurred, and the first current electrode selected by the routing circuit 121 is determined to have not occurred In the case of a touch event, the processing circuit 123 can determine that the second current electrode selected by the routing circuit 122 has the touch event.

In other embodiments, when the first touch sensing data of the analog-to-digital converter ADCa indicates that the touch event occurs, the processing circuit 123 checks the first current selected by the routing circuit 121 In addition to the electrode and its adjacent sensing electrode, the processing circuit 123 can also check at least one of the second sensing electrodes in the sub-region 112 adjacent to the second current electrode selected by the routing circuit 122 in space. Whether the touch event occurs on two adjacent sensing electrodes is used to determine whether the touch event occurs on the second current electrode. For example, when the first touch sensing data of the analog-to-digital converter ADCa indicates that the touch event occurs, and the touch event also occurs on the at least one second adjacent sensing electrode In the case of, the processing circuit 123 can determine that the second current electrode selected by the routing circuit 122 has the touch event. Conversely, when the first touch sensing data of the analog-to-digital converter ADCa indicates that the touch event occurs, and when the at least one second adjacent sensing electrode does not occur the touch event Next, the processing circuit 123 can determine that the second current electrode selected by the routing circuit 122 does not have the touch event.

The related description of the first touch sensing data of the analog-to-digital converter ADCa can also be analogized to the second touch sensing data of the analog-to-digital converter ADCb. In the case where the second touch sensing data of the analog-to-digital converter ADCb indicates that the touch event occurs, the processing circuit 123 may check that it is adjacent to the third current electrode selected by the routing circuit 121 in space Whether at least one third adjacent sensing electrode of the first sensing electrodes of the connected sub-region 111 also has the touch event, to determine whether the third current electrode has the touch event; and (or ), the processing circuit 123 can check whether at least one of the second sensing electrodes in the sub-region 112 adjacent to the fourth current electrode selected by the routing circuit 122 in the space also occurs The touch event is used to determine whether the touch event occurs on the fourth current electrode.

FIG. 3 is a schematic diagram illustrating the layout of the sensing electrode array of the touch panel 110 shown in FIG. 1 according to an embodiment of the present invention. Assume that the touch panel 110 shown in FIG. 3 has 192 sensing electrodes E1 to E192. When the touch panel 110 is an in-cell touch display panel, these sub-electrodes E1 to E192 can be used as common voltage electrodes of the in-cell touch display panel. In the embodiment shown in FIG. 3, the touch panel 110 is divided into a sub-area 111 and a sub-area 112. The sub-region 111 includes sensing electrodes E1 to E8, sensing electrodes E17 to E24, sensing electrodes E33 to E40, sensing electrodes E49 to E56, sensing electrodes E65 to E72, sensing electrodes E81 to E88, and sensing electrodes E97 To E104, sensing electrodes E113 to E120, sensing electrodes E129 to E136, sensing electrodes E145 to E152, sensing electrodes E161 to E168, and sensing electrodes E177 to E184. The sub-region 112 includes sensing electrodes E9 to E16, sensing electrodes E25 to E32, sensing electrodes E41 to E48, sensing electrodes E57 to E64, sensing electrodes E73 to E80, sensing electrodes E89 to E96, and sensing electrodes E105 To E112, sensing electrodes E121 to E128, sensing electrodes E137 to E144, sensing electrodes E153 to E160, sensing electrodes E169 to E176, and sensing electrodes E185 to E192.

Please refer to Figure 1 to Figure 3. The routing circuit 121 is configured to select the sensing electrodes E1 to E8, E17 to E24, E33 to E40, E49 to E56, E65 to E72, E81 to E88, E97 to E104, and E113 to the sensing electrodes E1 to E8, E17 to E24, E33 to E40, E49 to E56, E65 to E72, E81 to E88, E97 to E104, and E113 to the Select one of E120, E129 to E136, E145 to E152, E161 to E168, and E177 to E184 as the first current electrode, and selectively connect the first current electrode to the common terminal TC1a of the routing circuit 121 (step S210) . In the sub-region 111 shown in FIG. 3, the numbers in parentheses indicate an example of the first order. The routing circuit 122 is configured to follow the sensing electrodes E9 to E16, E25 to E32, E41 to E48, E57 to E64, E73 to E80, E89 of the subregion 112 in a second order (different from the first order). Choose one of ~E96, E105~E112, E121~E128, E137~E144, E153~E160, E169~E176, and E185~E192 as the second current electrode, and selectively connect the second current electrode to the routing circuit The common terminal TC2a of 122 (step S220). In the sub-region 112 shown in FIG. 3, the numbers in parentheses indicate an example of the second order.

Assuming that the processing circuit 123 has only one analog-to-digital converter ADCa, this analog-to-digital converter ADCa needs to perform 96 reading operations (conversion operations). For example, in the first period, the analog-to-digital converter ADCa can perform a reading operation on the sensing electrode E1 and the sensing electrode E9. In the second period, the analog-to-digital converter ADCa can perform a reading operation on the sensing electrode E2 and the sensing electrode E11. In the third period, the analog-to-digital converter ADCa can perform a reading operation on the sensing electrode E3 and the sensing electrode E13. By analogy, the analog-to-digital converter ADCa can perform a reading operation on the sensing electrode E97 and the sensing electrode E25 in the 49th period, and perform a reading operation on the sensing electrode E184 and the sensing electrode E192 in the 96th period. Take operation.

Assuming that the processing circuit 123 has 8 analog-to-digital converters, these 8 analog-to-digital converters need to perform 12 reading operations (conversion operations). For example, in the first period, these 8 analog-to-digital converters can respectively perform a pair of sensing electrodes [E1 and E9], [E2 and E11], [E3 and E13], [E4 and E15], [E5 and E10], [E6 and E12], [E7 and E14], and [E8 and E16] perform a read operation. In the second period, these 8 analog-to-digital converters can respectively perform the sensing on the sensing electrodes [E17 and E41], [E18 and E43], [E19 and E45], [E20 and E47], [E21 and E42], [ E22 and E44], [E23 and E46] and [E24 and E48] perform a read operation. In the same way, the analog-to-digital converter ADCa can perform the sensing electrodes [E177 and E185], [E178 and E187], [E179 and E189], [E180 and E191], [E181 and E186], respectively in the 12th period. [E182 and E188], [E183 and E190] and [E184 and E192] perform a read operation.

It is assumed that an object TP (for example, a finger) touches the touch panel 110, and the touch position and touch range of the object TP are as shown in FIG. 3. That is, the touch range of the object TP overlaps the sensing electrodes E1, E2, E17, and E18. Therefore, in a touch frame, the processing circuit 123 can learn that at least one of the sensing electrodes E1 and E9 has a touch event based on the touch sensing data corresponding to the sensing electrodes E1 and E9; the processing circuit 123 can be based on The touch sensing data corresponding to the sensing electrodes E2 and E11 are used to learn that at least one of the sensing electrodes E2 and E11 has a touch event; the processing circuit 123 can sense touches corresponding to the sensing electrodes E17 and E41 Data to know that at least one of the sensing electrodes E17 and E41 has a touch event; the processing circuit 123 can learn at least one of the sensing electrodes E18 and E43 according to the touch sensing data corresponding to the sensing electrodes E18 and E43 The processing circuit 123 can know that the other sensing electrodes do not have a touch event based on the touch sensing data corresponding to the other sensing electrodes.

It is assumed that the sensing electrode E1 is the first current electrode selected by the routing circuit 121 and the sensing electrode E9 is the second current electrode selected by the routing circuit 122. In the case where the sensing electrodes E1 and E9 are preliminarily determined as "touch events occur", the processing circuit 123 can check at least one first adjacent sensing electrode adjacent to the sensing electrode E1 (for example, the sensing electrode E2, E17 and/or E18) whether the touch event also occurs, and/or check at least one second adjacent sensing electrode adjacent to the sensing electrode E9 (for example, the sensing electrodes E10, E25, and/or E26) ) Whether the touch event also occurs. Because the sensing electrodes E2, E17, and/or E18 adjacent to the sensing electrode E1 also have the touch event, the processing circuit 123 can further confirm that the first current electrode (sensing electrode E1) has occurred. Touch event. Because the sensing electrodes E10, E25, and E26 adjacent to the sensing electrode E9 do not have the touch event, the processing circuit 123 can further confirm that the second current electrode (sensing electrode E9) does not have the touch. event.

It is assumed that the sensing electrode E2 is the first current electrode selected by the routing circuit 121 and the sensing electrode E11 is the second current electrode selected by the routing circuit 122. In the case that the sensing electrodes E2 and E11 are preliminarily determined as "touch events occur", the processing circuit 123 can check at least one first adjacent sensing electrode adjacent to the sensing electrode E2 (for example, the sensing electrode E1, E3, E17, E18, and/or E19) whether the touch event also occurs, and/or check at least one second adjacent sensing electrode adjacent to the sensing electrode E11 (for example, the sensing electrode E10, E12) , E26, E27 and/or E28) Whether the touch event also occurs. Because the sensing electrodes E1, E17, and/or E18 adjacent to the sensing electrode E2 also have the touch event, the processing circuit 123 can further confirm that the first current electrode (sensing electrode E2) has occurred. Touch event. Since none of the sensing electrodes E10, E12, E26, E27, and E28 adjacent to the sensing electrode E11 has the touch event, the processing circuit 123 can further confirm that the second current electrode (sensing electrode E11) is not. The touch event occurred.

It is assumed that the sensing electrode E17 is the first current electrode selected by the routing circuit 121 and the sensing electrode E41 is the second current electrode selected by the routing circuit 122. In the case where the sensing electrodes E17 and E41 are preliminarily determined as "touch events occur", the processing circuit 123 can check at least one first adjacent sensing electrode adjacent to the sensing electrode E17 (for example, the sensing electrode E1, E2, E18, E33, and/or E34) whether the touch event also occurs, and/or check at least one second adjacent sensing electrode adjacent to the sensing electrode E41 (for example, the sensing electrode E24, E25) , E26, E40, E42, E56, E57, and/or E58) Whether the touch event also occurs. Because the sensing electrodes E1, E2, and/or E18 adjacent to the sensing electrode E17 also have the touch event, the processing circuit 123 can further confirm that the first current electrode (sensing electrode E17) has occurred. Touch event. Because none of the sensing electrodes E24, E25, E26, E40, E42, E56, E57, and E58 adjacent to the sensing electrode E41 have the touch event, the processing circuit 123 can further confirm the second current electrode ( The sensing electrode E41) did not occur the touch event.

It is assumed that the sensing electrode E18 is the first current electrode selected by the routing circuit 121 and the sensing electrode E43 is the second current electrode selected by the routing circuit 122. In the case where the sensing electrodes E18 and E43 are preliminarily determined as "touch events occur", the processing circuit 123 can check at least one first adjacent sensing electrode adjacent to the sensing electrode E18 (for example, the sensing electrode E1, E2, E3, E17, E19, E33, E34, and/or E35) whether the touch event also occurs, and/or check at least one second adjacent sensing electrode adjacent to the sensing electrode E43 (for example Sensing electrodes E26, E27, E28, E42, E44, E58, E59, and/or E60) whether the touch event also occurs. Because the sensing electrodes E1, E2, and/or E17 adjacent to the sensing electrode E18 also have the touch event, the processing circuit 123 can further confirm that the first current electrode (sensing electrode E18) has occurred. Touch event. Because none of the sensing electrodes E26, E27, E28, E42, E44, E58, E59, and E60 adjacent to the sensing electrode E43 has the touch event, the processing circuit 123 can further confirm the second current electrode ( The sensing electrode E43) did not occur the touch event.

According to different design requirements, the blocks of the routing circuit 121, the routing circuit 122, and/or the processing circuit 123 can be implemented in hardware, firmware, software, or A combination of more of the foregoing three.

In terms of hardware, the blocks of the routing circuit 121, the routing circuit 122, and/or the processing circuit 123 can be implemented in a logic circuit on an integrated circuit. The related functions of the routing circuit 121, the routing circuit 122, and/or the processing circuit 123 can be implemented as hardware using hardware description languages (for example, Verilog HDL or VHDL) or other suitable programming languages. For example, the related functions of the routing circuit 121, the routing circuit 122, and/or the processing circuit 123 can be implemented in one or more controllers, microcontrollers, microprocessors, and application-specific integrated circuits (Application- Specific integrated circuit (ASIC), digital signal processor (DSP), Field Programmable Gate Array (FPGA) and/or various logic blocks, modules and circuits in other processing units .

In the form of software and/or firmware, the related functions of the routing circuit 121, the routing circuit 122, and/or the processing circuit 123 can be implemented as programming codes. For example, general programming languages (such as C, C++, or assembly language) or other suitable programming languages are used to implement the routing circuit 121, the routing circuit 122, and/or the processing circuit 123. The programming code may be recorded/stored in a recording medium. The recording medium includes, for example, a read-only memory (Read Only Memory, ROM), a storage device, and/or a random access memory (Random Access Memory, RAM). . A computer, a central processing unit (CPU), a controller, a microcontroller, or a microprocessor can read and execute the programming code from the recording medium, so as to achieve related functions. As the recording medium, a "non-transitory computer readable medium" can be used. For example, tape, disk, card, semiconductor memory, and non-transitory computer readable medium can be used. Programming logic circuits, etc. Furthermore, the program may also be provided to the computer (or CPU) via any transmission medium (communication network or broadcast wave, etc.). The communication network is, for example, the Internet, wired communication, wireless communication, or other communication media.

In summary, the above embodiments disclose the touch device 100 and the touch drive device 120 and operation method thereof, which can divide the touch panel 110 into two or more sub-areas (for example, the sub-areas 111 and the sub-areas 112). In a reading operation performed by the processing circuit 123 on the touch panel 110, the routing circuit 121 can select a sensing electrode (the first current electrode) from the sub-region 111 according to the "first order", and the routing circuit 122 can A sensing electrode (second current electrode) is selected from the sub-region 112 according to the “second order” (different from the first order). The routing circuit 121 and the routing circuit 122 short-circuit (electrically connect) the first current electrode and the second current electrode to each other. At the same time (in a read operation performed by the processing circuit 123 on the touch panel 110), a same analog-to-digital converter (such as ADCa) of the processing circuit 123 can be obtained through the routing circuit 121 and the routing circuit 122 (reading Out) corresponding to the touch sensing results of the first current electrode and the second current electrode, and then converting the touch sensing result into touch sensing data. Therefore, when the number of analog-to-digital converters is limited, the touch drive device 120 can reduce the number of readings of the touch panel 110 (or can be used when the number of readings of the touch panel 110 is limited). Reduce the number of analog-to-digital converters).

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be subject to those defined by the attached patent application scope.

100: touch device 110: Touch panel 111, 112: sub-area 120: Touch drive device 121, 122: routing circuit 123: Processing circuit ADCa, ADCb: analog-to-digital converter E1～E192: Sensing electrode INa, INb: Input terminal S210, S220, S230, S240: steps TC1a, TC1b, TC2a, TC2b: common terminal TP: Object

FIG. 1 is a schematic diagram of a circuit block of a touch device according to an embodiment of the present invention. FIG. 2 is a schematic flowchart illustrating the operation method of the touch driving device according to an embodiment of the present invention. FIG. 3 is a schematic diagram illustrating the layout of the sensing electrode array of the touch panel shown in FIG. 1 according to an embodiment of the present invention.

100: touch device

110: Touch panel

111, 112: sub-area

120: Touch drive device

121, 122: routing circuit

123: Processing circuit

ADCa, ADCb: analog-to-digital converter

INa, INb: Input terminal

TC1a, TC1b, TC2a, TC2b: common terminal

Claims (21)

A touch driving device is suitable for driving a touch panel. The touch driving device includes: A first routing circuit having a plurality of first selection terminals adapted to be coupled to a plurality of first sensing electrodes of a first sub-area of the touch panel, and is configured to start from the plurality of first sensing electrodes in a first order Selecting one of the sensing electrodes as a first current electrode, and selectively connecting the first current electrode to a first common terminal of the first routing circuit; A second routing circuit having a plurality of second selection terminals adapted to be coupled to a plurality of second sensing electrodes of a second sub-area of the touch panel, and configured as a first order different from the first order In the second sequence, one of the second sensing electrodes is selected as a second current electrode, and the second current electrode is selectively connected to a second common terminal of the second routing circuit, wherein the second common terminal Coupled to the first common terminal; and A processing circuit having a first input terminal coupled to the first common terminal and the second common terminal, wherein, A first analog-to-digital converter of the processing circuit converts a first touch sensing result corresponding to the first input terminal into a first touch sensing data; and In the case that the first touch sensing data indicates that a touch event has occurred, the processing circuit checks at least one of the first neighboring electrodes of the first sensing electrodes adjacent to the first current electrode in the space Whether the touch event also occurs on the sensing electrode is used to determine whether the touch event occurs on the first current electrode. The touch driving device according to claim 1, wherein: In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the touch event also occurs on the at least one first adjacent sensing electrode, the processing circuit determines that the first current electrode has occurred The touch event; and In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the at least one first adjacent sensing electrode does not have the touch event, the processing circuit determines that the first current electrode does not The touch event occurred. The touch driving device according to claim 2, wherein: In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the first current electrode is judged to have no such touch event, the processing circuit determines that the second current electrode has the occurrence of the touch event. Touch event. The touch driving device according to claim 1, wherein when the first touch sensing data indicates that the touch event occurs, the processing circuit also checks the space adjacent to the second current electrode Whether the touch event also occurs on at least one second adjacent sensing electrode among the second sensing electrodes is used to determine whether the touch event occurs on the second current electrode. The touch driving device according to claim 4, wherein: In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the touch event also occurs on the at least one second adjacent sensing electrode, the processing circuit determines that the second current electrode has occurred The touch event; and In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the at least one second adjacent sensing electrode does not have the touch event, the processing circuit determines that the second current electrode does not The touch event occurred. The touch driving device according to claim 1, wherein: The first routing circuit selects another of the first sensing electrodes as a third current electrode in the first order, and selectively connects the third current electrode to a third current electrode of the first routing circuit Common end The second routing circuit selects another of the second sensing electrodes as a fourth current electrode in the second order, and selectively connects the fourth current electrode to a fourth current electrode of the second routing circuit Common terminal, wherein the fourth common terminal is coupled to the third common terminal; A second input terminal of the processing circuit is coupled to the third common terminal and the fourth common terminal; A second analog-to-digital converter of the processing circuit converts a second touch sensing result corresponding to the second input terminal into a second touch sensing data; and In the case where the second touch sensing data indicates that the touch event has occurred, the processing circuit checks at least one third adjacency among the first sensing electrodes adjacent to the third current electrode in space Whether the touch event also occurs on the sensing electrode to determine whether the third current electrode has the touch event, or the processing circuit checks in the second sensing electrodes adjacent to the fourth current electrode in space To determine whether the touch event occurs on the fourth current electrode whether the touch event also occurs on the at least one fourth adjacent sensing electrode. The touch driving device according to claim 1, wherein the touch panel is an in-cell touch display panel, and the first sensing electrodes and the second sensing electrodes are used as the in-cell A common voltage electrode of the touch display panel. An operation method of a touch drive device, the touch drive device is suitable for driving a touch panel, and the operation method includes: A first routing circuit selects one of the plurality of first sensing electrodes in a first sub-area of the touch panel as a first current electrode in a first order, and selectively selects the first current electrode A first common terminal connected to the first routing circuit; A second routing circuit selects one of a plurality of second sensing electrodes in a second sub-area of the touch panel as a second current electrode in a second order different from the first order, and The second current electrode is selectively connected to a second common terminal of the second routing circuit, wherein the second common terminal and the first common terminal are commonly coupled to a first input terminal of a processing circuit; Converting a first touch sensing result corresponding to the first input terminal into a first touch sensing data by a first analog-to-digital converter of the processing circuit; and In the case where the first touch sensing data indicates that a touch event has occurred, the processing circuit checks at least one of the first sensing electrodes adjacent to the first current electrode in space. Whether the touch event also occurs adjacent to the sensing electrode is used to determine whether the touch event occurs on the first current electrode. The operation method as described in claim 8, further including: In the case where the first touch sensing data indicates that the touch event occurs, and in the case where the touch event also occurs on the at least one first adjacent sensing electrode, it is determined that the first current electrode has the touch event Event; and When the first touch sensing data indicates that the touch event has occurred, and when the touch event does not occur on the at least one first adjacent sensing electrode, it is determined that the first current electrode does not have the touch event. Touch event. The operation method described in claim 9 further includes: In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the first current electrode is judged as not having the touch event, it is determined that the second current electrode has the touch event . The operation method as described in claim 8, further including: In the case where the first touch sensing data indicates that the touch event has occurred, the processing circuit checks at least one second of the second sensing electrodes adjacent to the second current electrode in space. Whether the touch event also occurs adjacent to the sensing electrode is used to determine whether the touch event occurs on the second current electrode. The operation method described in claim 11 further includes: When the first touch sensing data indicates that the touch event occurs, and when the touch event also occurs on the at least one second adjacent sensing electrode, determine that the second current electrode has the touch event Event; and In the case that the first touch sensing data indicates that the touch event has occurred, and in the case that the at least one second adjacent sensing electrode does not have the touch event, it is determined that the second current electrode does not have the touch event. Touch event. The operation method as described in claim 8, further including: The first routing circuit selects another one of the first sensing electrodes as a third current electrode in the first order, and selectively connects the third current electrode to a second current electrode of the first routing circuit Three common ends The second routing circuit selects another of the second sensing electrodes as a fourth current electrode in the second order, and selectively connects the fourth current electrode to a first electrode of the second routing circuit Four common terminals, wherein the fourth common terminal and the third common terminal are commonly coupled to a second input terminal of the processing circuit; Converting a second touch sensing result corresponding to the second input terminal into a second touch sensing data by a second analog-to-digital converter of the processing circuit; and In the case where the second touch sensing data indicates that the touch event occurs, the processing circuit checks at least one third of the first sensing electrodes adjacent to the third current electrode in space. Whether the touch event also occurs adjacent to the sensing electrode is used to determine whether the third current electrode has the touch event, or the processing circuit checks the second sensing that is adjacent to the fourth current electrode in space Whether the touch event also occurs on at least one fourth adjacent sensing electrode among the electrodes is used to determine whether the touch event occurs on the fourth current electrode. The operation method according to claim 8, wherein the touch panel is an in-cell touch display panel, and the first sensing electrodes and the second sensing electrodes are used as the in-cell touch display panel Control a common voltage electrode of the display panel. A touch device including: A touch panel; A first routing circuit having a plurality of first selection terminals coupled to a plurality of first sensing electrodes of a first sub-area of the touch panel, and is configured to detect from the plurality of first sensing electrodes in a first order Selecting one of the electrodes as a first current electrode, and selectively connecting the first current electrode to a first common terminal of the first routing circuit; A second routing circuit having a plurality of second selection terminals coupled to a plurality of second sensing electrodes of a second sub-area of the touch panel, configured to be in a second order different from the first order One of the second sensing electrodes is selected as a second current electrode, and the second current electrode is selectively connected to a second common terminal of the second routing circuit, wherein the second common terminal is coupled To the first common end; and A processing circuit having a first input terminal coupled to the first common terminal and the second common terminal, wherein, A first analog-to-digital converter of the processing circuit converts a first touch sensing result corresponding to the first input terminal into a first touch sensing data; and In the case that the first touch sensing data indicates that a touch event has occurred, the processing circuit checks at least one of the first neighboring electrodes of the first sensing electrodes adjacent to the first current electrode in the space Whether the touch event also occurs on the sensing electrode is used to determine whether the touch event occurs on the first current electrode. The touch device according to claim 15, wherein: In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the touch event also occurs on the at least one first adjacent sensing electrode, the processing circuit determines that the first current electrode has occurred The touch event; and In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the at least one first adjacent sensing electrode does not have the touch event, the processing circuit determines that the first current electrode does not The touch event occurred. The touch device according to claim 16, wherein: In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the first current electrode is judged to have no such touch event, the processing circuit determines that the second current electrode has the occurrence of the touch event. Touch event. The touch device according to claim 15, wherein when the first touch sensing data indicates that the touch event occurs, the processing circuit also checks the space adjacent to the second current electrode Whether the touch event also occurs on at least one second adjacent sensing electrode among the second sensing electrodes is used to determine whether the touch event occurs on the second current electrode. The touch device according to claim 18, wherein: In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the touch event also occurs on the at least one second adjacent sensing electrode, the processing circuit determines that the second current electrode has occurred The touch event; and In the case where the first touch sensing data indicates that the touch event has occurred, and in the case where the at least one second adjacent sensing electrode does not have the touch event, the processing circuit determines that the second current electrode does not The touch event occurred. The touch device according to claim 15, wherein: The first routing circuit selects another of the first sensing electrodes as a third current electrode in the first order, and selectively connects the third current electrode to a third current electrode of the first routing circuit Common end The second routing circuit selects another of the second sensing electrodes as a fourth current electrode in the second order, and selectively connects the fourth current electrode to a fourth current electrode of the second routing circuit Common terminal, wherein the fourth common terminal is coupled to the third common terminal; A second input terminal of the processing circuit is coupled to the third common terminal and the fourth common terminal; A second analog-to-digital converter of the processing circuit converts a second touch sensing result corresponding to the second input terminal into a second touch sensing data; and In the case where the second touch sensing data indicates that the touch event occurs, the processing circuit checks at least one third neighbor among the first sensing electrodes adjacent to the third current electrode in space Whether the touch event also occurs on the sensing electrode to determine whether the touch event occurs on the third current electrode, or the processing circuit checks in the second sensing electrodes adjacent to the fourth current electrode in space To determine whether the touch event occurs on the fourth current electrode whether the touch event also occurs on the at least one fourth adjacent sensing electrode. The touch device according to claim 15, wherein the touch panel is an in-cell touch display panel, and the first sensing electrodes and the second sensing electrodes are used as the in-cell touch display panel A common voltage electrode of the touch display panel.

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