CN111813256B - Touch processing method, device and touch system - Google Patents

Abstract

The invention discloses a touch processing method, which comprises the following steps: selecting a detection range, wherein the detection range comprises N first electrodes, and N is a positive integer greater than 2; the following steps are repeatedly performed N times: selecting N-1 out of the N first electrodes as an ith combination, wherein i is a positive integer from 1 to N; simultaneously sending driving signals to the plurality of first electrodes in the ith combination; and measuring the sensed driving signals through a plurality of second electrodes to obtain dimension sensing information of an ith period, wherein the ith combination and the jth combination respectively comprise a plurality of first electrodes, the combinations are different, j is a positive integer from 1 to N, and i is not equal to j; respectively summing all the i-th period one-dimensional sensing information into full-period one-dimensional sensing information; and calculating the two-dimensional sensing information.

Description

Touch processing method, device and touch system

Technical field

The present invention relates to the field of touch detection technology, and in particular to touch processing methods, devices and touch systems.

Background technique

Touch screen or panel is one of the common input and output interfaces of modern electronic systems. As the size of the touch screen becomes larger and larger, the number of touch electrodes on the touch screen increases, and the speed of scanning the touch screen for external conductive objects becomes slower. How to speed up the scanning speed of the touch screen so as to maintain or even speed up the reporting frequency of scanning results is a problem to be solved by the present invention.

Contents of the invention

The object of the present invention is to provide a touch processing method, device and touch system to solve the problem that as the number of touch electrodes on the touch screen increases, the speed of scanning the touch screen for external conductive objects will decrease. Slowing down problem.

The present invention provides a touch processing method, which is suitable for a touch panel. The touch panel includes a plurality of first electrodes parallel to a first direction and a plurality of second electrodes parallel to a second direction. The touch processing method Including: selecting a detection range that includes N first electrodes, where N is a positive integer greater than 2; repeating the following steps N times: selecting N-1 of the N first electrodes as The i-th combination, where i is a positive integer from 1 to N; simultaneously sends driving signals to the plurality of first electrodes in the i-th combination for a first period of time; and measures the induced energy through the plurality of second electrodes. Driving signals to obtain one-dimensional sensing information in the i-th period, where the i-th combination and the j-th combination respectively contain different combinations of the plurality of first electrodes, j is a positive integer from 1 to N, and i is not equal to j; Sum up all the one-dimensional sensing information of the i-th period to obtain the one-dimensional sensing information of the whole period; and calculate the two-dimensional sensing information based on the one-dimensional sensing information of the whole period and all the one-dimensional sensing information of the i-th period. test information.

In one embodiment, the touch processing method further includes: detecting whether there is a proximity event on the touch panel near the selected N first electrodes according to the two-dimensional sensing information, wherein the proximity event It is an event in which an external conductive object approaches or contacts the touch panel. When the first electrode corresponding to the proximity event sends a driving signal for the first period of time, the second electrode corresponding to the proximity event cannot Sufficient driving signal is measured to detect the proximity event.

In one embodiment, when the first electrode corresponding to the proximity event emits a driving signal for N-1 first time periods, a sufficient driving signal can be measured from the second electrode corresponding to the proximity event. to detect the proximity event.

In one embodiment, each step of the above embodiment is repeatedly executed until all the first electrodes are selected for the detection range by the selection step.

In one embodiment, when performing the step of selecting the detection range for at least the kth time, M pieces of the first electrodes are selected, where M is a positive integer greater than 2, and M is not equal to N.

In one embodiment, the M first electrodes selected when performing the step of selecting the detection range for the kth time correspond to another proximity event detected in the previous time, where M is smaller than N.

In one embodiment, the touch processing method further includes: obtaining a plurality of two-dimensional sensing information obtained after repeatedly executing the steps of the above embodiment; and according to the plurality of two-dimensional sensing information and each of the two-dimensional sensing information. The selected N first electrodes corresponding to the two-dimensional sensing information respectively calculate the two-dimensional sensing information of the full touch panel corresponding to the touch panel; and based on the two-dimensional sensing information of the full touch panel Detect whether there is a proximity event on the touch panel.

In one embodiment, the i-th first electrode that is not selected in the i-th combination is different from the i+1-th first electrode that is not selected in the i+1-th combination. neighboring.

In one embodiment, among the two-dimensional sensing information, the sensing information corresponding to the i-th first electrode is the difference between the one-dimensional sensing information corresponding to the entire period and a quotient value, where the quotient value It is the quotient of the one-dimensional sensing information in the N-i+1 period divided by (N-1).

In one embodiment, the touch processing method further includes: simultaneously sending a second driving signal to one of the first electrodes outside the i-th combination for the first period of time, wherein in the two-dimensional sensing information , the sensing information corresponding to the i-th first electrode is corresponding to the product of (N-2)/N and the difference, which is the one-dimensional sensing information of the whole period minus the N-i+1th One-dimensional sensing information occurs during a period, wherein the second driving signal is an inverse signal of the driving signal.

According to an embodiment of the present application, a touch processing device is provided for controlling a touch panel. The touch panel includes a plurality of first electrodes parallel to a first direction and a plurality of second electrodes parallel to a second direction. , the touch processing device includes: a driving circuit module; a sensing circuit module; a connection network module for connecting the driving circuit module to any one or more of the first electrodes and connecting the sensing circuit module to any one or more of the first electrodes. the second electrode; and a processor module for executing a program stored in the non-volatile memory to implement the following steps: select a detection range, the detection range includes N first electrodes, where N is greater than 2 is a positive integer; repeat the following steps N times: select N-1 of the N first electrodes as the i-th combination, where i is a positive integer from 1 to N; let the drive circuit module select the i-th combination The plurality of first electrodes within simultaneously emit driving signals for a first period of time; and the sensing circuit module measures the sensed driving signals through the plurality of second electrodes to obtain the one-dimensional sensing information of the i-th period , where the i-th combination and the j-th combination respectively contain different combinations of the plurality of first electrodes, j is a positive integer from 1 to N, i is not equal to j; all the one-dimensional sensing information of the i-th period are summed up respectively. is the one-dimensional sensing information for the entire period; and calculates the two-dimensional sensing information based on the one-dimensional sensing information for the entire period and all the one-dimensional sensing information for the i-th period.

In one embodiment, the processor module is also used to execute a program to detect whether there is a proximity event on the touch panel near the selected N first electrodes based on the two-dimensional sensing information, wherein The proximity event is an event in which an external conductive object approaches or contacts the touch panel. When the first electrode corresponding to the proximity event sends a driving signal for the first period of time, the one of the first electrodes corresponding to the proximity event cannot The second electrode measures sufficient driving signal to detect the proximity event.

In one embodiment, when the first electrode corresponding to the proximity event emits a driving signal for N-1 first time periods, a sufficient driving signal can be measured from the second electrode corresponding to the proximity event. to detect the proximity event.

In one embodiment, the processor module is further configured to execute a program to implement: repeatedly executing each step of the above embodiment until all the first electrodes are selected for the detection range by the selection step.

In one embodiment, when performing the step of selecting the detection range for at least the kth time, M pieces of the first electrodes are selected, where M is a positive integer greater than 2, and M is not equal to N.

In one embodiment, the M first electrodes selected when performing the step of selecting the detection range for the kth time correspond to another proximity event detected in the previous time, where M is smaller than N.

In one embodiment, the processor module is also used to execute a program to: obtain a plurality of two-dimensional sensing information obtained after repeatedly executing each step of the above embodiment; and according to the plurality of two-dimensional sensing information and each Calculate the two-dimensional sensing information of the full touch panel corresponding to the selected N first electrodes respectively corresponding to the two-dimensional sensing information; and according to the two-dimensional sensing information of the full touch panel The detection information detects whether there is a proximity event on the touch panel.

In one embodiment, the i-th first electrode that is not selected in the i-th combination is different from the i+1-th first electrode that is not selected in the i+1-th combination. neighboring.

In one embodiment, the step of selecting N-1 first electrodes in the i-th combination is performed randomly.

In one embodiment, among the two-dimensional sensing information, the sensing information corresponding to the i-th first electrode is the difference between the one-dimensional sensing information corresponding to the entire period and a quotient value, where the quotient value It is the quotient of the one-dimensional sensing information in the N-i+1 period divided by (N-1).

In one embodiment, the step of simultaneously sending drive signals to the plurality of first electrodes in the i-th combination for the first period of time further includes: simultaneously sending drive signals to one of the first electrodes outside the i-th combination. The second driving signal is emitted for the first period of time, wherein among the two-dimensional sensing information, the sensing information corresponding to the i-th first electrode is corresponding to the difference between (N-2)/N and product, the difference is the one-dimensional sensing information of the whole period minus the one-dimensional sensing information of the N-i+1th period, wherein the second driving signal is the inverse signal of the driving signal.

According to an embodiment of the present application, a touch system is provided, including the touch panel and the touch processing device described in any of the above embodiments.

According to the touch processing method, device and touch system provided by the present invention, compared with the traditional mutual capacitance sensing method, a fixed arithmetic operation time can be spent within the desired detection range, thereby reducing The sensing time of the period. When N is larger, more sensing time can be saved. The advantage of the present invention is that it can speed up the scanning speed of the touch screen, so as to speed up the reporting frequency of scanning results.

Description of the drawings

Figure 1 is a block diagram of a touch system according to an embodiment of the present invention;

Figure 2 is a schematic diagram of a touch screen according to an embodiment of the present invention;

Figure 3 is a schematic flow chart of a mutual capacitance sensing method according to an embodiment of the present invention;

FIG. 4 is a schematic flowchart of a mutual capacitance sensing method according to another embodiment of the present invention.

【Symbol Description】

100: Touch system

110: Touch processing device

111: Interconnection Network module

112: Drive circuit module

113: Sensing circuit module

114: Processor module

115: Interface module

120: Touch screen or panel

121, 121A~C: first electrode

122, 122A~H: second electrode

130: stylus

135: Touchpad eraser

140: Host

141: Input/output interface module

142:CPU module

143: Graphics Processor Module

144: Memory module

145: Network interface module

146: Memory module

300: Mutual capacitance sensing method

310～390: Step 400: Mutual capacitance sensing method

Detailed ways

Please refer to FIG. 1 , which is a block diagram of a touch system 100 according to an embodiment of the present invention. The touch system 100 can be a common desktop, laptop, tablet personal computer, industrial control computer, smart phone or other form of calculator system with touch function.

The touch system 100 may include a touch processing device 110, a touch panel or screen 120 connected to the touch processing device, and a host 140 connected to the touch processing device. The touch system 100 may further include one or more stylus pens 130 and/or touch pads 135 . In the following in this application, the touch panel or screen 120 may be generally referred to as the touch screen 120. However, in an embodiment lacking a display function, those of ordinary skill in the art will know that the touch screen referred to in this application is Touch panel.

The touch screen 120 includes a plurality of first electrodes 121 parallel to the first axis and a plurality of second electrodes 122 parallel to the second axis. The first electrode 121 may be interleaved with a plurality of second electrodes 122 to form multiple sensing points or sensing areas. Likewise, the second electrodes 122 may be interleaved with multiple first electrodes 121 to form multiple sensing points or sensing areas. In certain embodiments, this application may refer to the first electrode 121 as the first touch electrode 121 and the second electrode 122 as the second touch electrode 122. This application also collectively refers to the first electrode 121 and the second electrode 122 as touch electrodes. In some embodiments of the touch screen 120, the first electrode 121 and the second electrode 122 are made of transparent materials. The first electrode 121 and the second electrode 122 can be connected on the same electrode layer using a cross-bridge between multiple conductive sheets of each first electrode 121 or second electrode 122 . The first electrode 121 and the second electrode 122 may also be in different upper and lower electrode layers. Unless otherwise specified, the present application can generally be applied to embodiments of a single layer or multiple electrode layers. The first axis and the second axis are usually perpendicular to each other, but this application does not limit the first axis to be perpendicular to the second axis. In one embodiment, the first axis may be a horizontal axis or a new axis of the touch screen 120 .

The touch processing device 110 may include the following hardware circuit modules: an Interconnection Network module 111, a driving circuit module 112, a sensing circuit module 113, a processor module 114 and an interface module 115. The touch processing device 110 can be implemented in a single integrated circuit, and the integrated circuit can include one or more chips. The touch processing device 110 may also be implemented using multiple integrated circuits and an interconnected circuit board carrying the multiple integrated circuits. The touch processing device 110 can also be implemented in the same integrated circuit as the above-mentioned host 140, or can be implemented in the same chip as the above-mentioned host 140. In other words, this application does not limit the implementation of the touch processing device 110 .

The connection network module 111 is used to respectively connect the plurality of first electrodes 121 and/or the plurality of second electrodes 122 of the touch screen 120 . The connection network module 111 can accept control commands from the processor module 114 and is used to connect the driving circuit module 112 with any one or more touch electrodes, and is also used to connect the sensing circuit module 113 with any one or more touch electrodes. Touch electrodes. The connection network module 111 may include a combination of one or more multiplexers (MUX) to implement the above functions.

The drive circuit module 112 may include components such as a frequency generator, a frequency divider, a frequency multiplier, a phase locked loop, a power amplifier, a DC-DC voltage converter, a rectifier and/or a filter, and is used according to the processor module The control command 114 provides a driving signal to any one or more touch electrodes through the above-mentioned connection network module 111. Various analog signals or digital signals can be modulated on the above-mentioned driving signals in order to transmit certain information. The above modulation methods include but are not limited to frequency modulation (FM), phase modulation (Phase Modulation), amplitude modulation (AM), double sideband modulation (DSB), single sideband modulation (SSB-AM), residual sideband modulation (Vestigial Sideband Modulation), amplitude offset modulation (ASK), phase offset modulation (PSK), quadrature amplitude modulation (QAM), frequency offset modulation (FSK), continuous phase modulation (CPM), Technologies such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiplexing (OFDM), and Pulse Width Modulation (PWM). The driving signal may include one or more square waves, sine waves, or any modulated waveform. The driving circuit module 112 may include one or more channels, and each channel may be connected to any one or more touch electrodes through the connection network module 111 .

The sensing circuit module 113 may include an integrator, a sampler, a frequency generator, a frequency divider, a frequency multiplier, a phase locked loop, a power amplifier, a multiplier, a DC-DC voltage converter, a rectifier and/or a filter, etc. The component is used to sense any one or more touch electrodes through the above-mentioned connection network module 111 according to the control command of the processor module 114 . When the touch signal is sent through one of the above touch electrodes, the other touch electrode can sense the touch signal. The sensing circuit module 113 can cooperate with the modulation method performed by the driving circuit module 112 to perform corresponding demodulation changes on the driving signal sensed by the other touch electrode, so as to restore the content carried by the driving signal. information. The sensing circuit module 113 may include one or more channels, and each channel may be connected to any one or more touch electrodes through the connection network module 111 . At the same time, each channel can be sensed and demodulated simultaneously.

In one embodiment, the above-mentioned driving circuit module 112 and sensing circuit module 113 may include an analog front-end (AFE) circuit. In another embodiment, in addition to the analog front-end circuit, the above-mentioned driving circuit module 112 and sensing circuit module 113 may include a digital back-end (DBE) circuit. When the above-mentioned driving circuit module 112 and sensing circuit module 113 only include analog front-end circuits, the digital back-end circuit can be implemented within the processor module 114 .

The processor module 114 may include a digital signal processor for connecting the analog front-end circuits of the above-mentioned driving circuit module 112 and the sensing circuit module 113 respectively, and may also be used to connect the above-mentioned driving circuit module 112 and the sensing circuit module 113 respectively. Digital back-end circuit. The processor module 114 may include an embedded processor, non-volatile memory and volatile memory. The non-volatile memory can store a normal operating system or a real-time operating system, as well as application programs executed under the operating system. The aforementioned operating system and application program include a plurality of instructions and data. After these instructions are executed by the processor (including an embedded processor and/or a digital signal processor), they can be used to control other modules of the touch processing device 110 , including the connection network module 111, the driving circuit module 112, the sensing circuit module 113 and the interface module 115. For example, the processor module 114 may include an 8051 series processor commonly used in the industry, an Intel i960 series processor, an ARM Cortex-M series processor, etc. This application does not limit the type and number of processors included in the processor module 114.

The above-mentioned multiple instructions and data can be used to implement various steps mentioned in this application, as well as the processes and methods composed of these steps. Certain instructions may operate independently within the processor module 114, such as arithmetic and logic operations. Other instructions may be used to control other modules of the touch processing device 110 , and these instructions may include input/output interfaces of the processor module 114 to control other modules. Other modules can also provide information to the operating system and/or application programs executed by the processor module 114 through the input and output interfaces of the processor module 114 . Those of ordinary skill in the art should have general knowledge of computer organization and architecture, and can understand that the processes and methods mentioned in this application can be implemented through the above-mentioned modules and instructions.

The above-mentioned interface module 115 may include various serial or parallel buses, such as Universal Serial Bus (USB), Integrated Circuit Bus (I ² C), Peripheral Interconnect (PCI), Peripheral Interconnect Express (PCI). -Express), IEEE1394 and other industrial standard input and output interfaces. The touch processing device 110 is connected to the host 140 through the interface module 115 .

The touch system 100 may include one or more stylus pens 130 and/or touch pads 135 . The above-mentioned stylus 130 or touch pad 135 can be a transmitter that emits electrical signals. It can include an active transmitter that actively emits electrical signals, or it can be a passive transmitter that passively emits electrical signals. A reactive transmitter that emits electrical signals in response to external electrical signals. The above-mentioned stylus 130 or touch eraser 135 may include one or more electrodes for receiving electrical signals from the touch screen 120 synchronously or asynchronously, or sending electrical signals to the touch screen 120 synchronously or asynchronously. Signal. These electrical signals may use one or more modulation methods as described above.

The above-mentioned stylus 130 or touch pad 135 may be a conductor, used to conduct driving signals or ground through the user's hand or body. The above-mentioned stylus 130 or touch pad 135 can be connected to the input/output interface module 141 of the host 140 or other modules under the input/output interface module 141 in a wired or wireless manner.

The touch processing device 110 can detect one or more external conductive objects through the touch screen 120, such as human fingers, palms, or a passive stylus 130 or touch pad 135, and can also detect an object that emits light. electrical signal to the stylus 130 or the touchpad eraser 135. The touch processing device 110 may use mutual-capacitance or self-capacitance to detect external conductive objects. The above-mentioned stylus 130 or touch eraser 135 and the touch processing device 110 can use the above-mentioned signal modulation and corresponding signal demodulation to transmit information using electrical signals. The touch processing device 110 can use electrical signals to detect one or more proximity locations where the stylus 130 or touch eraser 135 approaches or contacts the touch screen 120 , or sensors on the stylus 130 or touch eraser 135 Information such as status (for example, pressure sensor or button), the direction of the stylus 130 or touch eraser 135 , or the inclination angle of the stylus 130 or touch eraser 135 corresponding to the plane of the touch screen 120 .

The host 140 is the main device for controlling the touch system 110 and may include an input/output interface module 141 connected to the interface module 115, a central processing unit module 142, a graphics processor module 143, and a computer connected to the central processing unit module 142. The memory module 144, the network interface module 145 and the memory module 146 are connected to the input/output interface module 141.

The memory module 146 includes non-volatile memory. Common examples are hard disk, electronically erasable rewritable read-only memory (EEPROM), or flash memory. The memory module 146 can store a common operating system and application programs executed under the operating system. The network interface module 145 may include a hardware network connection interface for wired connection and/or wireless connection. The network interface module 145 can comply with common industrial standards, such as IEEE 802.11 wireless local area network standard, IEEE 802.3 wired local area network standard, 3G, 4G, and/or 5G wireless communication network standards, Bluetooth wireless communication network standards, etc.

The central processing unit module 142 can be directly or indirectly connected to the above-mentioned input/output interface module 141, graphics processor module 143, memory module 144, network interface module 145 and memory module 146. The central processing unit module 142 may include one or more processors or processor cores. Common processors can include x86 and x64 instruction set processors from Intel, AMD, and VIA Electronics, or ARM instruction set processors from Apple, Qualcomm, and MediaTek, and can also include other forms of complex computer instruction sets. (CISC) or reduced computer instruction set (RISC) processors. The aforementioned operating system and application program include multiple instructions and data corresponding to the above-mentioned instruction set. After these instructions are executed by the central processor module 142, they can be used to control other modules of the touch system 100.

The optional graphics processor module 143 is typically used to handle the calculations associated with graphics output. The graphics processor module 143 can be connected to the above-mentioned touch screen 120 for controlling the output of the touch screen 120 . In some applications, the host 140 may not require special processing by the graphics processor module 143 and may directly cause the central processing unit module 142 to perform calculations related to graphics output.

The host 140 may also include other components or components not shown in FIG. 1 , such as a sound effect input/output interface, a keyboard input interface, a mouse input interface, a trackball input interface, and/or other hardware modules. Those of ordinary skill in the art should have general knowledge of computer structures and architectures, and can understand that the touch system 100 mentioned in this application is only a schematic description, and the rest is related to the technical features of the invention provided in this application. For parts, it is necessary to refer to the scope of the description and claims.

Please refer to FIG. 2 , which is a schematic diagram of a touch screen 120 according to an embodiment of the present invention. For convenience of explanation, the touch screen 120 only includes three first electrodes 121, which are the first electrodes 121A, 121B, and 121C in order. The touch screen 120 includes a plurality of second electrodes 122A˜122H. Those of ordinary skill in the art can understand that the touch screen 120 may include N first electrodes 121 , where N is a positive integer. In some embodiments, N is a positive integer greater than 10.

In the traditional mutual capacitance detection method, the driving circuit module 112 provides a driving signal to one of the three first electrodes 121 in a time-sharing manner. When the driving signal is provided, the sensing circuit module 113 is caused to sense all the second electrodes 122 three times at the same time, so as to obtain three sets of one-dimensional sensing information. Each set of one-dimensional sensing information includes sensing results for each second electrode 122 . These three sets of one-dimensional sensing information can form two-dimensional sensing information or sensing images according to the order of their corresponding first electrodes 121 that emit driving signals. Using the two-dimensional sensing information or sensing image, the processor module 114 can detect whether an external conductive object is close to the touch screen 120 .

Assume that each first electrode 121 needs to be driven for a period of time T so that the sensing circuit module 113 can accumulate a sufficient amount of signal. In the traditional mutual capacitance detection method mentioned above, it takes at least 3T to scan the touch screen 120 once. Broadly speaking, if the touch screen 120 has N first electrodes 121, scanning the touch screen 120 once requires at least a length of time N x T.

According to an embodiment of the present invention, a method of scanning multiple first electrodes 121 simultaneously is provided. Please refer to Table 1, which shows a timing chart for simultaneous scanning of the touch screen 120 shown in FIG. 2 .

Table I

In the embodiment shown in Table 1, the driving and sensing operations are performed in three periods, but the length of each period is T/2. In other words, for each period alone, the driving signal emitted by each first electrode 121 is not enough for the sensing circuit module 113 to accumulate a sufficient amount of sensing signals. However, after three periods, the time length for each first electrode 121 to emit a driving signal has accumulated to T, allowing the sensing circuit module 113 to accumulate a sufficient amount of sensing signals.

In each period, two first electrodes 121 send out driving signals at the same time. Therefore, the induction signal sensed by any second electrode 122 accumulates the induction energy of the driving signals emitted by the two first electrodes 121 . In the last column of Table 1, we can see the source of the driving signal induced by any second electrode 122 in each period. For example, during the first period, the source of the driving signal sensed by any second electrode 122 is the first electrode 121A and 121B. In each period, the signal obtained by sensing each second electrode 122 may also constitute one-dimensional sensing information.

After the driving and sensing operations of the three periods are completed, a set of one-dimensional sensing information of the first period, a set of one-dimensional sensing information of the second period, and a set of one-dimensional sensing information of the third period can be generated respectively. Then, each element of these three sets of one-dimensional sensing information is accumulated, and a set of accumulated one-dimensional sensing information can be obtained. For the value of any element of the accumulated one-dimensional sensing information, the accumulated sensing signal corresponds to twice the first electrode 121A, the first electrode 121B and the first electrode 121C emitted in a single period. The sum of the driving signals. When the value of any element is divided by two, the accumulated sensing signal corresponds to the sum of the driving signals emitted by the first electrode 121A, the first electrode 121B and the first electrode 121C in a single period. Then, the difference obtained by subtracting the corresponding element of the one-dimensional sensing information in the first period from the half value of any element corresponds to the driving signal emitted by the first electrode 121C in a single period. Finally, the difference is multiplied by twice the product, which corresponds to the driving signal emitted by the first electrode 121C during the two periods.

Similarly, the difference obtained by subtracting the half value of any element of the accumulated one-dimensional sensing information from the corresponding element of the one-dimensional sensing information in the second period corresponds to the value emitted by the first electrode 121B in a single period. drive signal. The difference is then multiplied by the product of twice, which corresponds to the driving signal emitted by the first electrode 121B during the two periods.

Similarly, the difference obtained by subtracting the half value of any element of the accumulated one-dimensional sensing information from the corresponding element of the one-dimensional sensing information in the third period corresponds to the value emitted by the first electrode 121A in a single period. drive signal. The difference is then multiplied by the product of twice, which corresponds to the driving signal emitted by the first electrode 121A during the two periods.

The corresponding element values of the above-mentioned one-dimensional sensing information in the first period, one-dimensional sensing information in the second period and one-dimensional sensing information in the third period are respectively represented as M ₁ , M ₂ and M ₃ . The element value of the accumulated one-dimensional sensing information is expressed as M _total , which is the sum of M ₁ +M ₂ +M ₃ .

M _total ＝M ₁ +M ₂ +M ₃ (1)

The element value X _C corresponding to the one-dimensional sensing information of the first electrode 121C can be expressed as:

The element value X _B corresponding to the one-dimensional sensing information of the first electrode 121B can be expressed as:

The element value X _A corresponding to the one-dimensional sensing information of the first electrode 121A can be expressed as:

After the above calculation, one-dimensional sensing corresponding to the first electrode 121C can be obtained through the one-dimensional sensing information in the first period, the one-dimensional sensing information in the second period, and the one-dimensional sensing information in the third period. Information, one-dimensional sensing information corresponding to the first electrode 121B, one-dimensional sensing information corresponding to the first electrode 121A. These three sets of one-dimensional sensing information corresponding to the first electrodes 121A˜C respectively correspond to a certain second electrode 122 . In other words, three values corresponding to the three intersection points of the first electrodes 121A, 121B, and 121C and a certain second electrode 122 are respectively obtained. Multiple sets of one-dimensional sensing information corresponding to multiple second electrodes can also form two-dimensional sensing information or sensing images. Using the two-dimensional sensing information or sensing image, the processor module 114 can detect whether an external conductive object is close to the touch screen 120 .

Compared with the traditional approach, in equation (1), the above embodiment requires two additional additions in parallel to obtain the accumulated one-dimensional sensing information. Next, in equations (2), (3), and (4), three-dimensional division and three-dimensional subtraction are used in parallel to obtain sensing values corresponding to the three first electrodes 121 respectively. Since the denominator of division in equations (2), (3), and (4) is 2, division can be performed using a right shift operation of one bit. Overall, compared to the traditional mutual capacitance sensing method, the above embodiment takes eight additional arithmetic operations, but reduces the sensing time by 1.5T period. Since the instruction cycle of the processor module 114 is much higher than the sensing time of the sensing circuit module 113, and the processor module 114 usually has a vector parallel operation unit that can process multiple sets of operations at one time, scanning the touch screen 120 once saves The time is very considerable. Accordingly, the frequency with which the touch processing device 110 reports to the host 140 that an external conductive object is close to the touch screen 120 can be increased.

According to an embodiment of the present invention, a method for scanning N first electrodes 121 _i simultaneously is provided, where N is a positive integer greater than 1, and i ranges from 1 to N. Please refer to Table 2, which shows a timing chart for simultaneously scanning the touch screen 120 having N first electrodes 121 .

Table II

In the embodiment shown in Table 2, the driving and sensing operations are performed in N periods, but the length of each period is T/(N-1). In other words, for each period alone, the driving signal emitted by each first electrode 121 _i is not enough for the sensing circuit module 113 to accumulate a sufficient amount of sensing signals. However, after N periods, the time length for each first electrode 121 _i to emit a driving signal is accumulated to T, which allows the sensing circuit module 113 to accumulate a sufficient amount of sensing signal.

In each period, (N-1) first electrodes 121 simultaneously send out driving signals. Therefore, the induction signal sensed by any second electrode 122 accumulates the induction energy of the driving signals emitted by (N-1) first electrodes 121 . In the last column of Table 2, we can see the source of the driving signal induced by any second electrode 122 in each period. For example, during the first period, the source of the driving signal induced by any second electrode 122 is the first electrode 121 ₁ to 121 _N-1 . In each period, the signal obtained by sensing each second electrode 122 may also constitute one-dimensional sensing information.

After the driving and sensing operations for N periods are completed, N sets of one-dimensional sensing information for the i-th period can be generated respectively. Then, each element of the N sets of one-dimensional sensing information is accumulated, and a set of accumulated one-dimensional sensing information can be obtained. For the value of any element of the accumulated one-dimensional sensing information, the accumulated sensing signal corresponds to (N-1) times of the first electrode 121 ₁ to the first electrode 121 _N in a single period. The sum of the driving signals emitted. When the value of any element is divided by (N-1), its accumulated sensing signal corresponds to the sum of the driving signals emitted by the first electrode 121 ₁ to the first electrode 121 _N in a single period. Then, the difference obtained by dividing the quotient of any element by (N-1) and subtracting the corresponding element of the one-dimensional sensing information in the first period corresponds to the value emitted by the first electrode 121 _N in a single period. drive signal. The difference is then multiplied by a product of (N-1) times, which corresponds to the driving signal emitted by the first electrode 121 _N during (N-1) periods.

The corresponding element values of the one-dimensional sensing information in the i-th period mentioned above are respectively represented as M _i , and the element values of the accumulated one-dimensional sensing information are represented as M _total , which can be expressed as:

The element value _Xi corresponding to the one-dimensional sensing information of the first electrode 121 _i can be expressed as:

After the above calculation, the one-dimensional sensing information respectively corresponding to the N first electrodes 121 _i can be obtained through the above-mentioned N sets of one-dimensional sensing information in the i-th period. These N groups respectively correspond to the one-dimensional sensing information of the first electrode 121 _i , and can also form two-dimensional sensing information or a sensing image. Using the two-dimensional sensing information or sensing image, the processor module 114 can detect whether an external conductive object is close to the touch screen 120 .

Compared with the traditional approach, in equation (5), the above embodiment requires additional (N-1) additions in parallel to obtain the accumulated one-dimensional sensing information. Next, in equation (6), one division and two subtractions are used in parallel to obtain the sensing values corresponding to the N first electrodes 121 respectively. In general, compared to the traditional mutual capacitance sensing method, the above-mentioned embodiment spends additional fixed arithmetic operation time, but reduces The sensing time of the period. For example, when N is 10, the sensing time can be reduced by 8.89T. When the N value is larger, more sensing time is saved.

Since the instruction cycle of the processor module 114 is much higher than the sensing time of the sensing circuit module 113, and the processor module 114 usually has a vector parallel operation unit that can process multiple sets of operations at one time, scanning the touch screen 120 once saves The time is very considerable. Accordingly, the frequency with which the touch processing device 110 reports to the host 140 that an external conductive object is close to the touch screen 120 can be increased.

In one embodiment, the touch screen 120 may have HxN first electrodes 121 , or more than (H-1)N but less than HxN first electrodes 121 . Therefore, it can be divided into H operations, and H is a positive integer. Each operation can perform the above-mentioned mutual capacitance detection on the N first electrodes 121, so as to obtain one-dimensional sensing information corresponding to the N first electrodes 121. After completing H operations, one-dimensional sensing information corresponding to HxN first electrodes 121 can be obtained. Using the two-dimensional sensing information or sensing image, the processor module 114 can detect whether an external conductive object is close to the touch screen 120 .

In this embodiment, the N first electrodes 121 targeted by each operation may not be adjacent to each other. In order to reduce the electromagnetic interference phenomenon caused by the fixed sequence of the driving signals, N non-adjacent first electrodes 121 can be selected for detection in each of the H operations. Or in each of the H operations, select N adjacent first electrodes 121 for detection. However, in two consecutive operations, the 2N first electrodes 121 may not be adjacent. The aforementioned selection of the first electrode 121 can also be randomly generated using random numbers to avoid the generation of electromagnetic interference at a fixed frequency.

According to an embodiment of the present invention, a method of scanning multiple first electrodes 121 simultaneously is provided. Please refer to Table 3, which shows a timing chart for simultaneous scanning of the touch screen 120 shown in FIG. 2 .

Table 3

In the embodiment shown in Table 3, the driving and sensing operations are performed in three periods, but the length of each period is T/2. Compared with the embodiment in Table 1, during the first period, the driving signal emitted by the first electrode 121C is inverse phase with the driving signal emitted by the first electrode 121A or the first electrode 121B. Since inverted driving signals will cancel each other when received by the same second electrode 122, the driving signal received by a certain second electrode 122 during the first period can be expressed as 121A+121B-121C. Similarly, during the second period, the driving signal sent by the first electrode 121B is inverse phase with the driving signal sent by the first electrode 121A or the first electrode 121C, and the driving signal received by the second electrode 122 can be Expressed as 121A-121B+121C. Similarly, during the third period, the driving signal sent by the first electrode 121A is inverse phase with the driving signal sent by the first electrode 121B or the first electrode 121C, and the driving signal received by the second electrode 122 can be Expressed as -121A+121B+121C.

After the driving and sensing operations of the three periods are completed, a set of one-dimensional sensing information of the first period, a set of one-dimensional sensing information of the second period, and a set of one-dimensional sensing information of the third period can be generated respectively. Then, each element of these three sets of one-dimensional sensing information is accumulated, and a set of accumulated one-dimensional sensing information can be obtained. For the value of any element of the accumulated one-dimensional sensing information, the accumulated sensing signal corresponds to the positive phase signal emitted by the first electrode 121A, the first electrode 121B and the first electrode 121C in a single period. The sum of the driving signals is expressed as 121A+121B+121C.

If the value of any element of the accumulated one-dimensional sensing information is subtracted from the value of the one-dimensional sensing information in the first period, the difference corresponds to twice the sensing amount of the driving signal emitted by the first electrode 121C. Then divide this difference by two, which is equivalent to the induction amount corresponding to the driving signal emitted by the first electrode 121C. Similarly, the difference obtained by subtracting the value of any element of the accumulated one-dimensional sensing information from the value of the one-dimensional sensing information in the second period corresponds to twice the induction of the driving signal emitted by the first electrode 121B. quantity. Then divide this difference by two, which is equivalent to the induction amount corresponding to the driving signal emitted by the first electrode 121B. Similarly, the difference obtained by subtracting the value of any element of the accumulated one-dimensional sensing information from the value of the one-dimensional sensing information in the third period corresponds to twice the induction of the driving signal emitted by the first electrode 121A. quantity. Then divide this difference by two, which is equivalent to the induction amount corresponding to the driving signal emitted by the first electrode 121A.

The element value X _C corresponding to the one-dimensional sensing information of the first electrode 121C can be expressed as:

X _C =(M _total -M ₁ )/2 (7)

The element value X _B corresponding to the one-dimensional sensing information of the first electrode 121B can be expressed as:

X _B =(M _total -M ₂ )/2 (8)

The element value X _A corresponding to the one-dimensional sensing information of the first electrode 121A can be expressed as:

X _A =(M _total -M ₃ )/2 (9)

After the above calculation, one-dimensional sensing corresponding to the first electrode 121C can be obtained through the one-dimensional sensing information in the first period, the one-dimensional sensing information in the second period, and the one-dimensional sensing information in the third period. Information, one-dimensional sensing information corresponding to the first electrode 121B, one-dimensional sensing information corresponding to the first electrode 121A. These three groups respectively correspond to the one-dimensional sensing information of the first electrodes 121A to 121C, and can also form two-dimensional sensing information or sensing images.

According to an embodiment of the present invention, a method of simultaneously scanning N first electrodes 121 _i is provided, where N is a positive integer greater than one, and i ranges from 1 to N. Please refer to Table 4, which shows a timing chart for simultaneously scanning the touch screen 120 having N first electrodes 121 .

Table 4

In the embodiment shown in Table 4, just like the embodiment in Table 3, during the i-th period, the first electrode 121 _N-i+1 emits an inverted driving signal. So that the element value _Xi corresponding to the one-dimensional sensing information of the first electrode 121 _i can be expressed as:

After the above calculation, the one-dimensional sensing information respectively corresponding to the N first electrodes 121 _i can be obtained through the above-mentioned N sets of one-dimensional sensing information in the i-th period. The N groups of corresponding elements corresponding to the one-dimensional sensing information of the first electrode 121 _i all correspond to a certain second electrode 122 . In other words, N values corresponding to the N intersection points of the first electrodes 121 ₁ , 121 ₂ , ..., 121 _N and a certain second electrode 122 are respectively obtained. Multiple sets of the one-dimensional sensing information corresponding to the plurality of second electrodes 122 can also form two-dimensional sensing information or sensing images. Using the two-dimensional sensing information or sensing image, the processor module 114 can detect whether an external conductive object is close to the touch screen 120 .

In equation (10), two divisions and two subtractions are used to obtain sensing values corresponding to N first electrodes 121 respectively. In general, compared to the traditional mutual capacitance sensing method, the above-mentioned embodiment spends additional fixed arithmetic operation time, but reduces The sensing time of the period. For example, when N is 10, the sensing time can be reduced by 8.89T. When the N value is larger, more sensing time is saved.

Please refer to FIG. 3 , which is a schematic flowchart of a mutual capacitance sensing method 300 according to an embodiment of the present invention. The mutual capacitance sensing method can be applied to the touch processing device 110 shown in FIG. 1 , in particular, the processor module 114 is used to execute multiple instructions compiled according to the method for realizing the mutual capacitance sensing. Touch processing methods.

Step 310: Select N first electrodes that do not send out driving signals.

Step 320: Select N-1 of the N first electrodes as a new combination.

Step 330: Send driving signals to the first electrodes in the combination simultaneously to obtain one-dimensional sensing information in the i-th period. where i can be a positive integer between 1 and N. In step 330, the driving signal is sent through the driving circuit module 112, and the time length for sensing the driving signal sensed by the second electrode through the sensing circuit module 113 has the characteristics shown in the second embodiment of Table 2.

In one embodiment, step 330 may also send an inverse driving signal to a first electrode outside the combination at the same time. This embodiment is the same as the embodiments shown in Table 3 and Table 4.

Step 340: Determine whether the driving signal has been sent to the first electrode of the combination N times. If the result is no, the process returns to step 320. If the result is yes, the process proceeds to step 350.

Step 350: Calculate the one-dimensional sensing information corresponding to the N first electrodes based on the one-dimensional sensing information of the N i-th time periods obtained by performing step 330 N times. When the inverse driving signal is not sent through the first electrode other than the combination in step 330, the calculation steps of step 350 are as described in the embodiments shown in Table 1 or Table 2. More precisely, it can be done according to equation (6). When, in step 350, an inverse driving signal is emitted through the first electrode other than the combination, the calculation steps of step 350 are as described in the embodiments shown in Table 3 or Table 4. Also precisely, it can be done according to equation (10).

Step 360: Determine whether the scanning of the touch screen is completed. If the judgment result is no, the process returns to step 310. If the judgment result is yes, the process proceeds to step 370.

Step 370: Compose two-dimensional sensing information based on the one-dimensional sensing information corresponding to each first electrode. Each one-dimensional sensing information among the two-dimensional sensing information is arranged in sequence according to the relative position of its corresponding first electrode.

Step 380: Calculate the proximity event of the external conductive object based on the two-dimensional sensing information.

Optional step 390: Report the proximity event to the host.

Please refer to FIG. 4 , which is a schematic flowchart of a mutual capacitance sensing method 400 according to an embodiment of the present invention. The mutual capacitance sensing method can be applied to the touch processing device 110 shown in FIG. 1 , in particular, the processor module 114 is used to execute multiple instructions compiled according to the method for realizing the mutual capacitance sensing. Touch processing methods.

Compared with the mutual capacitance sensing method 300 of Figure 3, the mutual capacitance sensing method 400 of Figure 4 obtains the two-dimensional sensing information corresponding to each detection range, calculates and reports the proximity events in the detection range to the host. The mutual capacitance sensing method 300 in Figure 3 splices each one-dimensional sensing information into two-dimensional sensing information of a single full touch panel, and then calculates and reports proximity events on the touch panel to the host. The embodiment shown in Figure 3 has higher accuracy for proximity events located at the edges of two detection ranges. However, it must store more one-dimensional sensing information to calculate and report points for an entire touch panel. The embodiment in Figure 4 can perform individual detections for certain detection ranges without having to collect an entire touch panel before calculating and reporting points.

According to an embodiment of the present invention, the present application provides a touch processing method suitable for a touch panel. The touch panel includes a plurality of first electrodes parallel to a first direction and a plurality of second electrodes parallel to a second direction. Electrodes, the touch processing method includes: selecting a detection range, the detection range includes N first electrodes, where N is a positive integer greater than 2; repeating the following steps N times: selecting the N first electrodes Among them, N-1 are used as the i-th combination, where i is a positive integer from 1 to N; driving signals are simultaneously sent to the plurality of first electrodes in the i-th combination for a first period of time; and through the plurality of first electrodes The second electrode measures the induced driving signal to obtain one-dimensional sensing information during the i-th period, where the i-th combination and the j-th combination respectively include different combinations of the plurality of first electrodes, and j is a positive number from 1 to N. Integer, i is not equal to j; sum up all the one-dimensional sensing information of the i-th period to obtain the one-dimensional sensing information of the whole period; and according to the one-dimensional sensing information of the whole period and all the one-dimensional sensing information of the i-th period information to calculate the two-dimensional sensing information.

In one embodiment, in order to detect proximity events only within the selected detection range, the touch processing method further includes: based on the two-dimensional sensing information, detecting proximity events near the selected N first electrodes. Whether there is a proximity event on the touch panel, where the proximity event is an event in which an external conductive object approaches or contacts the touch panel, and when the first electrode corresponding to the proximity event emits a driving signal for the first period of time For a long time, the second electrode corresponding to the proximity event cannot measure enough driving signals to detect the proximity event.

In one embodiment, in order to shorten the detection time as much as possible and increase the detection reporting rate as much as possible, when the first electrode corresponding to the proximity event sends out a driving signal for N-1 first time periods , only the second electrode corresponding to the proximity event can measure enough driving signals to detect the proximity event.

In one embodiment, in order to detect the proximity event of the entire touch panel, the touch processing method further includes: repeatedly executing the above steps until all the first electrodes are selected as the detection range by the selection step. .

In one embodiment, in order to enhance or weaken the detection accuracy of a certain area of the touch panel, or to detect the remaining zero distortion range of the touch panel, the detection range can be reduced or increased, and the process is executed for at least the kth time. When selecting the detection range step, select M first electrodes, where M is a positive integer greater than 2, and M is not equal to N.

In one embodiment, since proximity events are usually continuous, in order to enhance the detection accuracy of the range near another proximity event detected previously, the M selected when performing the step of selecting a detection range for the kth time The first electrodes correspond to another previously detected proximity event, where M is smaller than N.

In one embodiment, in order to detect proximity events of the entire touch panel, especially for proximity events at the edges of two adjacent detection ranges, the touch processing method further includes: obtaining and repeatedly executing each of the above steps. The plurality of two-dimensional sensing information obtained after the step; according to the plurality of two-dimensional sensing information and the selected N first electrodes corresponding to each of the two-dimensional sensing information, calculate the corresponding Full-touch panel two-dimensional sensing information of the touch panel; and detecting whether there is a proximity event on the touch panel based on the two-dimensional sensing information of the full-touch panel.

In one embodiment, in order to avoid continuous interference with adjacent areas, the i-th first electrode not selected in the i-th combination and the i-th first electrode not selected in the i+1-th combination are The i+1 first electrodes are not adjacent.

In one embodiment, in order to avoid periodic electromagnetic interference, the step of selecting N-1 first electrodes in the i-th combination is performed randomly.

In one embodiment, in order to generate sensing information values corresponding to the driving signals of each first electrode, among the two-dimensional sensing information, the sensing information corresponding to the i-th first electrode is corresponding to The difference between the one-dimensional sensing information in the whole period and the quotient value, where the quotient value is the quotient value of the one-dimensional sensing information in the N-i+1th period divided by (N-1).

In one embodiment, in order to generate sensing information values corresponding to the driving signals of each first electrode, the plurality of first electrodes in the i-th combination simultaneously emit driving signals for the first period of time. The step also includes: simultaneously sending a second driving signal to the first electrode outside the i-th combination for the first period of time, wherein the two-dimensional sensing information corresponds to the i-th first electrode. The sensing information of the electrode is corresponding to the product of (N-2)/N and the difference, which is the one-dimensional sensing information of the whole period minus the one-dimensional sensing information of the N-i+1th period, where the The second driving signal is the inverse signal of the driving signal.

According to an embodiment of the present invention, a touch processing device is provided for controlling a touch panel. The touch panel includes a plurality of first electrodes parallel to a first direction and a plurality of second electrodes parallel to a second direction. , the touch processing device includes: a driving circuit module; a sensing circuit module; a connection network module for connecting the driving circuit module to any one or more of the first electrodes and connecting the sensing circuit module to any one or more of the first electrodes. the second electrode; and a processor module for executing a program stored in the non-volatile memory to implement the following steps: select a detection range, the detection range includes N first electrodes, where N is greater than 2 is a positive integer; repeat the following steps N times: select N-1 of the N first electrodes as the i-th combination, where i is a positive integer from 1 to N; let the drive circuit module select the i-th combination The plurality of first electrodes within simultaneously emit driving signals for a first period of time; and the sensing circuit module measures the sensed driving signals through the plurality of second electrodes to obtain the one-dimensional sensing information of the i-th period , where the i-th combination and the j-th combination respectively contain different combinations of the plurality of first electrodes, j is a positive integer from 1 to N, i is not equal to j; all the one-dimensional sensing information of the i-th period are summed up respectively. is the one-dimensional sensing information for the entire period; and calculates the two-dimensional sensing information based on the one-dimensional sensing information for the entire period and all the one-dimensional sensing information for the i-th period.

In one embodiment, in order to detect proximity events only within the selected detection range, the processor module is also used to execute a program to implement: based on the two-dimensional sensing information, detect the proximity event in the selected N items. Whether there is a proximity event on the touch panel near the first electrode, where the proximity event is an event in which an external conductive object approaches or contacts the touch panel, and when the first electrode corresponding to the proximity event sends a driving signal to the During the first period of time, the second electrode corresponding to the proximity event cannot measure enough driving signals to detect the proximity event.

In one embodiment, in order to shorten the detection time as much as possible and increase the detection reporting rate as much as possible, when the first electrode corresponding to the proximity event sends out a driving signal for N-1 first time periods , only the second electrode corresponding to the proximity event can measure enough driving signals to detect the proximity event.

In one embodiment, in order to detect the proximity event of the entire touch panel, the processor module is also used to execute a program to implement: repeat the above steps until all the first electrodes are selected by the selection step. to the detection range.

In one embodiment, in order to enhance or weaken the detection accuracy of a certain area of the touch panel, or to detect the remaining zero distortion range of the touch panel, the detection range can be reduced or increased, and the process is executed for at least the kth time. When selecting the detection range step, select M first electrodes, where M is a positive integer greater than 2, and M is not equal to N.

In one embodiment, since close events are usually continuous, in order to enhance the detection accuracy of the range near another previously detected close event, the k-th selected detection range step is selected when executing the step of selecting a detection range. M first electrodes correspond to another previously detected proximity event, where M is smaller than N.

In one embodiment, in order to detect proximity events of the entire touch panel, especially proximity events at the edges of two adjacent detection ranges, the processor module is also used to execute a program to achieve: obtain repeated A plurality of two-dimensional sensing information obtained after executing each of the above steps; according to the plurality of two-dimensional sensing information and the selected N first electrodes respectively corresponding to each of the two-dimensional sensing information, calculate Full-touch panel two-dimensional sensing information corresponding to the touch panel; and detecting whether there is a proximity event on the touch panel based on the two-dimensional sensing information of the full-touch panel.

In one embodiment, in order to avoid continuous interference with adjacent areas, the i-th first electrode not selected in the i-th combination and the i-th first electrode not selected in the i+1-th combination are The i+1 first electrodes are not adjacent.

In one embodiment, in order to avoid periodic electromagnetic interference, the step of selecting N-1 first electrodes in the i-th combination is performed randomly.

In one embodiment, in order to generate a sensing information value corresponding to the driving signal of each first electrode, in the two-dimensional sensing information, the sensing information corresponding to the i-th first electrode is corresponding to The difference between the one-dimensional sensing information in the whole period and the quotient value, where the quotient value is the quotient value of the one-dimensional sensing information in the N-i+1th period divided by (N-1).

In one embodiment, in order to generate sensing information values corresponding to the driving signals of each first electrode, the plurality of first electrodes in the i-th combination simultaneously emit driving signals for the first period of time. The step also includes: simultaneously sending a second driving signal to the first electrode outside the i-th combination for the first period of time, wherein the two-dimensional sensing information corresponds to the i-th first electrode. The sensing information of the electrode is corresponding to the product of (N-2)/N and the difference, which is the one-dimensional sensing information of the whole period minus the one-dimensional sensing information of the N-i+1th period, where the The second driving signal is the inverse signal of the driving signal.

According to an embodiment of the present invention, a touch system is provided, including the touch panel and the touch processing device.

The embodiments described in this application are not intended to limit the scope of the present invention. Those of ordinary skill in the art can make various changes or improvements to the embodiments. The technical features described in a certain embodiment can also be applied to other embodiments on the premise that there is no technical contradiction. Components or steps with the same names but corresponding to different reference symbols between embodiments may also have the same technical features. As long as there is no causal relationship between the action mechanisms or process steps of each component in the claims, description, or drawings, they can be implemented in any sequence. Parts of the illustrations may not be drawn according to their relative sizes, and the scale of some parts may be different from the scale of other parts in order to highlight some parts. And irrelevant details may not be fully drawn for the sake of neatness.

Claims (23)

1. A touch processing method, characterized in that it is suitable for a touch panel. The touch panel includes a plurality of first electrodes parallel to a first direction and a plurality of second electrodes parallel to a second direction. The touch panel includes: Control processing methods include: Select a detection range, which includes N first electrodes, where N is a positive integer greater than 2; Repeat the following steps N times: Select N-1 of the N first electrodes as the i-th combination, where i is a positive integer from 1 to N; Simultaneously emitting driving signals to the plurality of first electrodes in the i-th combination for a first period of time; and The induced driving signals are measured through the plurality of second electrodes to obtain the one-dimensional sensing information of the i-th period, wherein the i-th combination and the j-th combination respectively contain different combinations of the plurality of first electrodes, and j is 1 To a positive integer of N, i is not equal to j; Sum up all the one-dimensional sensing information of the i-th period to obtain the one-dimensional sensing information of the whole period; and Two-dimensional sensing information is calculated based on the one-dimensional sensing information of the whole period and all the one-dimensional sensing information of the i-th period. 2. The touch processing method according to claim 1, further comprising; According to the two-dimensional sensing information, detect whether there is a proximity event on the touch panel near the selected N first electrodes, where the proximity event is an event in which an external conductive object approaches or contacts the touch panel, When the first electrode corresponding to the proximity event emits a driving signal for the first period of time, the second electrode corresponding to the proximity event cannot measure enough driving signal to detect the proximity event. 3. The touch processing method according to claim 2, wherein the proximity event can only be responded to when the first electrode corresponding to the proximity event emits a driving signal for N-1 first time periods. One of the second electrodes measures a sufficient driving signal to detect the proximity event. 4. The touch processing method according to claim 1, further comprising: Repeat each step of claim 1 until all the first electrodes are selected for the detection range in the step of selecting N-1 of the N first electrodes as the i-th combination. 5. The touch processing method according to claim 4, wherein when performing the step of selecting the detection range for at least the kth time, M pieces of the first electrodes are selected, where M is a positive integer greater than 2, And M is not equal to N. 6. The touch processing method according to claim 5, wherein the M first electrodes selected when performing the step of selecting the detection range for the kth time correspond to another proximity event detected previously. , where M is less than N. 7. The touch processing method according to claim 4, further comprising: Obtain a plurality of the two-dimensional sensing information obtained after repeatedly executing the steps of claim 1; Calculate the two-dimensional sensing information of the full touch panel corresponding to the touch panel based on the plurality of two-dimensional sensing information and the selected N first electrodes corresponding to each of the two-dimensional sensing information. ;as well as Detect whether there is a proximity event on the touch panel based on the two-dimensional sensing information of the full touch panel. 8. The touch processing method according to claim 1, wherein the i-th first electrode that is not selected in the i-th combination and the i-th first electrode that is not selected in the i+1-th combination are The i+1 first electrodes are not adjacent. 9. The touch processing method according to claim 1, wherein the step of selecting N-1 first electrodes in the i-th combination is performed randomly. 10. The touch processing method according to claim 1, wherein among the two-dimensional sensing information, the sensing information corresponding to the i-th piece of the first electrode is corresponding to the full-time one-dimensional sensing information. The difference between the information and the quotient value, where the quotient value is the quotient value of the one-dimensional sensing information in the N-i+1 period divided by (N-1). 11. The touch processing method according to claim 1, wherein the step of simultaneously sending drive signals to the plurality of first electrodes in the i-th combination for the first period of time further includes: The first electrode outside the i-th combination simultaneously sends a second driving signal for the first period of time, wherein among the two-dimensional sensing information, the sensing information corresponding to the i-th first electrode is Corresponding to the product of (N-2)/N and the difference, the difference is the one-dimensional sensing information of the whole period minus the one-dimensional sensing information of the N-i+1th period, where the second driving signal is The inverse of the drive signal. 12. A touch processing device, characterized in that it is used to control a touch panel. The touch panel includes a plurality of first electrodes parallel to a first direction and a plurality of second electrodes parallel to a second direction. The touch processing device includes: Drive circuit module; Sensing circuit module; A connection network module for connecting the driving circuit module to any one or more of the first electrodes and connecting the sensing circuit module to any one or more of the second electrodes; and The processor module is used to execute the program stored in the non-volatile memory to implement the following steps: Select a detection range, which includes N first electrodes, where N is a positive integer greater than 2; Repeat the following steps N times: Select N-1 of the N first electrodes as the i-th combination, where i is a positive integer from 1 to N; causing the driving circuit module to simultaneously send driving signals to the plurality of first electrodes in the i-th combination for a first period of time; and Let the sensing circuit module measure the induced driving signals through the plurality of second electrodes to obtain the one-dimensional sensing information of the i-th period, wherein the i-th combination and the j-th combination respectively include combinations of the plurality of first electrodes. They are all different, j is a positive integer from 1 to N, and i is not equal to j; Sum up all the one-dimensional sensing information of the i-th period to obtain the one-dimensional sensing information of the whole period; and Two-dimensional sensing information is calculated based on the one-dimensional sensing information of the whole period and all the one-dimensional sensing information of the i-th period. 13. The touch processing device according to claim 12, wherein the processor module is also used to execute a program to implement: According to the two-dimensional sensing information, detect whether there is a proximity event on the touch panel near the selected N first electrodes, where the proximity event is an event in which an external conductive object approaches or contacts the touch panel, When the first electrode corresponding to the proximity event emits a driving signal for the first period of time, the second electrode corresponding to the proximity event cannot measure enough driving signal to detect the proximity event. 14. The touch processing device according to claim 13, wherein the proximity event can only be responded to when the first electrode corresponding to the proximity event emits a driving signal for N-1 first time periods. One of the second electrodes measures a sufficient driving signal to detect the proximity event. 15. The touch processing device according to claim 12, wherein the processor module is also used to execute a program to implement: Repeat the steps of claim 12 until all the first electrodes are selected for the detection range in the step of selecting N-1 of the N first electrodes as the i-th combination. 16. The touch processing device according to claim 15, wherein when performing the step of selecting the detection range for at least the kth time, M pieces of the first electrodes are selected, where M is a positive integer greater than 2, And M is not equal to N. 17. The touch processing device according to claim 16, wherein the M first electrodes selected when performing the step of selecting the detection range for the kth time correspond to another proximity event detected previously. , where M is less than N. 18. The touch processing device according to claim 15, wherein the processor module is also used to execute a program to implement: Obtain a plurality of two-dimensional sensing information obtained after repeatedly executing the steps of claim 12; Calculate the two-dimensional sensing information of the full touch panel corresponding to the touch panel based on the plurality of two-dimensional sensing information and the selected N first electrodes corresponding to each of the two-dimensional sensing information. ;as well as Detect whether there is a proximity event on the touch panel based on the two-dimensional sensing information of the full touch panel. 19. The touch processing device according to claim 12, wherein the i-th first electrode not selected in the i-th combination and the i-th first electrode not selected in the i+1-th combination are The i+1 first electrodes are not adjacent. 20. The touch processing device according to claim 12, wherein the step of selecting N-1 first electrodes in the i-th combination is performed randomly. 21. The touch processing device according to claim 12, wherein among the two-dimensional sensing information, the sensing information corresponding to the i-th first electrode corresponds to the full-time one-dimensional sensing information. The difference between the information and the quotient value, where the quotient value is the quotient value of the one-dimensional sensing information in the N-i+1 period divided by (N-1). 22. The touch processing device according to claim 12, wherein the step of simultaneously sending drive signals to the plurality of first electrodes in the i-th combination for the first period of time further includes: The first electrode outside the i-th combination simultaneously sends a second driving signal for the first period of time, wherein among the two-dimensional sensing information, the sensing information corresponding to the i-th first electrode is Corresponding to the product of (N-2)/N and the difference, the difference is the one-dimensional sensing information of the whole period minus the one-dimensional sensing information of the N-i+1th period, where the second driving signal is The inverse of the drive signal. 23. A touch system, comprising the touch panel and the touch processing device according to any one of claims 12 to 22.