TW202238343A - Touch sensitive processing apparatus and touch system and method thereof - Google Patents

Abstract

A touch sensitive processing method for reducing interference from pixel refresh, comprising: sensing horizontal electrodes of a touch screen three times for gathering three sensing values, the sensing steps are separated by a time period; summing the three sensing values as sums; according to the sums, determining an external conductive object is disposed near a N-th horizontal electrode among the horizontal electrode of the touch screen; emitting driving signal from the N-th horizontal electrode and sensing the driving signal via vertical electrodes of the touch screen for gathering an N-th sensing array; and calculating a position of a touch event according to the N-th sensing array and the position of the N-th horizontal electrode.

Description

Touch processing device, touch system and touch processing method thereof

The present invention relates to touch screens, in particular to reducing the touch screen's interference with touch processing when pixels are updated.

Touch screens are the primary input and output devices in modern consumer electronics systems. A typical touch screen is a circuit that places a touch panel on top of the screen. There are also so-called on-cell touch screens, or in-cell touch screens, which may be applicable to the scope of this application. For example, the content of patent application 14/081,018 submitted by the applicant to the US Patent and Trademark Office on November 15, 2013 can be used as a reference example for this case.

Each screen has display characteristics including refresh rate and resolution. Refresh rate (refresh rate) usually refers to the frequency of updating the screen, usually in units of several screen frames per second (Frame Per Second, FPS) or frame rate. Taking the analog TV standard of the National Television System Committee (NTSC) of the United States as an example, the update rate is 59.94 Hz, and the resolution is 440×480. For the standard Video Graph Array, the resolution of VGA includes 640x480, 320x200 pixels (pixel), etc., and its update rate includes 50, 60, and 70Hz, etc. The commonly used high-resolution specification 1080P has a resolution of 1920x1080 and a frame rate of 24, 25, 30, or 60 Hz.

Generally speaking, each pixel of a modern LCD screen has a corresponding pixel electrode used to reverse the polarity of the liquid crystal, thereby changing the light transmittance of the liquid crystal of the pixel. Accordingly, it is possible to control the amount of light transmitted by the light-emitting diodes of each color under the liquid crystal, and further control the color of each pixel. Generally speaking, the screen controller will use a square wave for pulse width modulation (PWM, Pulse Width Modulation). The light transmittance of the liquid crystal of the pixel is controlled by pulse width modulation. As mentioned in US Pat. No. 8,421,828, the degree of polarization of the liquid crystal layer is related to the root mean square (Root-Mean-Square) of the voltage applied to the liquid crystal layer. During the duration of vision of the human eye, pulse width modulation can be used to apply a fixed voltage signal to the pixel liquid crystal layer to control the polarization of the pixel liquid crystal, that is, to control the light transmittance of the pixel liquid crystal.

At a certain resolution, such as 640x480, it means that each horizontal axis of the screen has 640 pixels, and each vertical axis has 480 pixels. When updating the screen, usually the uppermost horizontal axis pixels are updated first, from left to right, from top to bottom, until all the horizontal axis pixels are updated, one frame of update is completed. Under the display characteristics with a refresh rate of 60Hz, the screen needs to complete 60 screen frame updates within one second. Before updating the first pixel and after the last pixel of each horizontal axis, there may be a blank period during which the screen stops moving, which is called horizontal blank. When changing to the next screen frame, there may be a blank period during which the screen stops moving, which is called vertical blank.

For example, a vertical blank on a 1080P60 screen will appear every 16.667ms, which is 1/60th of a second. Since there are 1080 horizontal axes, each horizontal blank appears once in about 15.4us, that is, 1/(60*1080) seconds.

As shown in FIG. 1 , common touch electrodes are usually distributed along the horizontal axis and the vertical axis of the touch screen 110 , assuming that a plurality of parallel touch electrodes extending along the horizontal axis are called first electrodes. 121 , a plurality of parallel touch electrodes extending along the longitudinal axis are referred to as second electrodes 122 . These first electrodes and second electrodes are usually connected to the touch processing device 130 , and the latter performs mutual capacitance and/or self capacitance touch detection.

Due to the design and cost constraints of the touch processing device, too many touch electrodes cannot be connected, so the number of the first electrodes and the second electrodes are usually less than the resolution of the screen. Taking a touch screen of about 50 inches as an example, the length of the horizontal axis is about 1130 mm, and the length of the vertical axis is about 670 mm. If the distance between the electrodes is set to 8mm, there are about 83 first electrodes and 141 second electrodes. When the specification of the touch screen is 1080P, the horizontal axis length of each pixel is 0.59 mm, and the vertical axis length of each pixel is 0.62 mm. In other words, each first electrode covers approximately 12 horizontal axes of pixels.

As shown in FIG. 2 , which is a partially enlarged view of the touch screen, the interconnected diamond-shaped circuits on the upper layer are respectively the first electrodes 121 in the horizontal direction and the second electrodes 122 in the vertical direction. The lower layer includes a pixel array composed of individual pixels 210, not all of which are shown due to the large number of pixels. When the screen is updated, the horizontal axis 220 of pixels is used as the unit for updating. It can be seen that in FIG. 2 , each first electrode 121 covers six pixel horizontal axes 220 . Wherein, the pixel horizontal axis 221 is located between the two first electrodes, and the pixel horizontal axis 222 is located within the coverage of the first electrodes.

Generally speaking, the touch processing device 130 and the screen controller connected to the same touch screen 110 operate independently. The touch processing device 130 usually does not know the display settings of the touch screen 110 , such as resolution and update rate, and naturally does not know which horizontal pixel axis of the touch screen 110 is updated by the screen controller. The touch processing device 130 may perform mutual capacitance sensing, that is, to make a certain first electrode 121 parallel to the horizontal axis of the pixel emit a plurality of square waves as a driving signal, and make all the second electrodes 122 receive the driving signal. Signal. If the touch processing device 130 happens to be When the horizontal axis of the pixel covered by the first electrode 121 is updated, since the touch drive signal is a square wave, and the pixel update also uses the pulse width modulation of the square wave, the drive signal will seriously interfere with the pixel liquid crystal. Due to the degree of polarization, the user of the touch screen may see abnormally dark and bright conditions near the first electrode 121 . However, since the detection cycle of the touch controller and the update cycle of the screen are very fast, the intersection time of the two is shorter than the duration of human vision, so the probability of the user noticing abnormal dimness during mutual capacitance sensing is not high.

When performing mutual capacitance detection, the touch processing device 130 will make the touch driving electrodes send out driving signals in turn, and make the touch sensing electrodes sense the driving signals. Since the sensing circuit of the processor requires a larger cost than the driving circuit, in the above design, the designer may use a small number of first electrodes as touch sensing electrodes, and a large number of second electrodes as touch sensing electrodes. Touch drive electrodes.

When the second electrode is used as a touch driving electrode, full-screen mutual capacitance detection is performed, and the touch processing device 130 will make the second electrode send out an AC pulse signal in turn, either as a square wave or as a sine wave. When the frequency of the AC pulse signal is 200KHz, and each pulse sends out 30 cycles, the time for each second electrode to send out the signal is about 0.15ms or 150us, that is, 30/200,000 seconds. Since there are 141 second electrodes, and it takes processing time to replace the second electrodes, it takes at least 0.02115s or 21.15ms or 21150us to perform a full-screen mutual capacitance detection, which is much longer than the 15.4us for updating the horizontal axis of each pixel. . When the frequency of the AC pulse signal is 100 KHz, and each pulse sends out 30 cycles, the time for each second electrode to send out the signal is about 0.33 ms, that is, 30/100,000 seconds. Since there are 141 second electrodes, and it takes processing time to replace the second electrodes, it takes about 0.04653s or 46.53ms or 46530us to perform a full-screen mutual capacitance detection, which is much longer than the 15.4ms time for updating the horizontal axis of each pixel.

When using the first electrodes and the second electrodes to perform self-capacitance detection, the touch processing device 130 will respectively make all the first electrodes and all the second electrodes send driving signals, and make all the first electrodes and all the The second electrode measures the signal. If the same 200KHz 30-period AC pulse signal is used, the time spent by all the first electrodes is 0.15ms, and the time spent by all the second electrodes is also 0.15ms. The combination of the two is 0.3ms or 300us, which is much longer than each The update time of the pixel horizontal axis is 15.4us.

When updating a horizontal axis of pixels, new pixel data will be sent to the corresponding pixel electrodes in the horizontal axis. Therefore, the liquid crystal screen near the horizontal axis will emit greater electromagnetic interference than the liquid crystal screens in other places, and this electromagnetic interference phenomenon will affect the touch electrodes. In the above example, since one first electrode covers about 12 pixel horizontal axes, most of the pixel horizontal axes will only seriously interfere with a single first electrode, such as the pixel horizontal axis 222 in FIG. 2 . A small number of pixel horizontal axes are located between the two first electrodes, such as the pixel horizontal axis 221 in FIG. 2 , which will cause interference to these two first electrodes without causing serious interference to the far first electrodes.

Since the touch processing device responsible for touch sensing and the display processor responsible for display are not connected together, there is no way for the touch processing device to avoid updating the horizontal axis of a certain pixel from updating the horizontal axis of the pixel. The first electrode performs touch sensing, so as to avoid the electromagnetic interference emitted when receiving the update of the pixel.

Therefore, the problem to be solved in the present application is how to distinguish which lateral electrodes are related to touch sensing, and to perform further detection on these lateral electrodes, so as to measure a more accurate touch position. .

According to an aspect of the present application, a touch processing method is provided for reducing image Interference during element update. The touch processing method includes: performing first sensing on a plurality of horizontal electrodes on a touch screen to obtain a plurality of first sensing values; Sensing for the second time to obtain a plurality of second sensing values; after the interval time, the plurality of horizontal electrodes are sensed for the third time to obtain a plurality of third sensing values; corresponding to the plurality of horizontal electrodes The plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values of the electrodes are respectively summed into a plurality of sums of sensing values; according to the sum of the plurality of sensing values, it is judged that the There is an external conductive object close to the touch screen near the Nth horizontal electrode among the multiple horizontal electrodes; a driving signal is sent from the Nth horizontal electrode, and the driving signal is sensed from the mutual capacitance of the multiple vertical electrodes of the touch screen signal to obtain an Nth sensing value array; and calculate the position of a touch event according to the position of the Nth sensing value array and the Nth horizontal electrode, wherein the plurality of horizontal electrodes and the touch The transverse axes of the pixels of the screen are parallel to each other, the plurality of longitudinal electrodes are perpendicular to the transverse axes of the pixels of the touch screen, and the plurality of longitudinal electrodes and the plurality of transverse electrodes overlap each other to form a plurality of overlapping regions, and N is greater than The natural number of 1.

Furthermore, in order to locate the touch event more precisely, the touch processing method further includes: sending driving signals from the N-1th and N+1th horizontal electrodes respectively, and mutual capacitance from the plurality of vertical electrodes Sensing the driving signal to respectively obtain an N-1th sensing value array and an N+1th sensing value array; and according to the N-1th sensing value array, the Nth sensing value array, The position of the N+1th sensing value array and the N−1th to the N+1th horizontal electrodes is used to calculate the position of the touch event.

According to an aspect of the present application, a touch processing device is provided, which is used to reduce the interference when updating pixels, including: a driving circuit module; a sensing circuit module; and a sensor module connected to the driving circuit module and the sensing A processor module of the circuit module for performing non-volatile memory instructions in the memory to implement the following steps: make the sensing circuit module perform the first sensing on a plurality of horizontal electrodes on a touch screen to obtain a plurality of first sensing values; Afterwards, make the sensing circuit module conduct second sensing on the multiple horizontal electrodes to obtain multiple second sensing values; after the interval time, make the sensing circuit module sense the multiple horizontal electrodes The electrodes are sensed for the third time to obtain a plurality of third sensing values; the plurality of first sensing values corresponding to the plurality of horizontal electrodes, the plurality of second sensing values and the plurality of third sensing values The sensing values are respectively summed into a plurality of sensing value sums; according to the plurality of sensing value sums, it is judged that there is an external conductive object close to the touch screen near the Nth transverse electrode among the plurality of transverse electrodes; The circuit module sends a driving signal to the Nth horizontal electrode, and makes the sensing circuit module sense the driving signal from the mutual capacitance of the plurality of vertical electrodes of the touch screen to obtain an Nth sensing value array; and According to the position of the sensing value array and the Nth horizontal electrode, the position of a touch event is calculated, wherein the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, and the multiple vertical electrodes are parallel to the horizontal axis of the pixel of the touch screen. The horizontal axes of the pixels of the touch screen are perpendicular to each other, and the plurality of vertical electrodes and the plurality of horizontal electrodes overlap each other to form a plurality of overlapping regions, and N is a natural number greater than 1.

Furthermore, in order to locate the touch event more precisely, the processor module is further used to: respectively make the driving circuit module send a driving signal from the N-1th and N+1th horizontal electrodes, and make the The sensing circuit module senses the drive signal from a plurality of longitudinal electrode mutual capacitances to respectively obtain an N-1 array of sensing values and an array of N+1 sensing values; and according to the N-1 array of sensing values Positions of the measured value array, the Nth sensed value array, the N+1th sensed value array, and the N−1th to the N+1th horizontal electrodes are used to calculate the position of the touch event.

According to an aspect of the present application, a touch processing method is provided, which is used to reduce interference when updating pixels, including: first sensing multiple horizontal electrodes on a touch screen, to obtain a plurality of first sensing values; after an interval time, the plurality of horizontal electrodes are sensed for the second time to obtain a plurality of second sensing values; after the interval time, the plurality of horizontal electrodes The electrodes are sensed for the third time to obtain a plurality of third sensing values; the plurality of first sensing values corresponding to the plurality of horizontal electrodes, the plurality of second sensing values and the plurality of third sensing values The sensing values are respectively summed into a plurality of sums of sensing values; according to the sum of the plurality of sensing values, it is judged that there is an external The conductive object is close to the touch screen; and the drive signal is respectively sent from the Nth and the N+1th horizontal electrodes, and the drive signal is sensed by the mutual capacitance of a plurality of vertical electrodes of the touch screen to obtain a first N sensing value array and an N+1th sensing value array; and according to the Nth sensing value array, the N+1th sensing value array, the position of the Nth lateral electrode and the Nth The position of +1 horizontal electrode is used to calculate the position of a touch event, wherein the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, and the multiple vertical electrodes are mutually parallel to the horizontal axis of the pixel of the touch screen. vertical, and the plurality of vertical electrodes and the plurality of horizontal electrodes overlap each other to form a plurality of overlapping regions, and N is a natural number greater than 1.

Furthermore, in order to locate the touch event more precisely, the touch processing method further includes: sending driving signals from the N-1th and N+2th horizontal electrodes respectively, and mutual capacitance from the plurality of vertical electrodes Sensing the driving signal to respectively obtain an N-1th sensing value array and an N+2th sensing value array; and according to the N-1th sensing value array, the Nth sensing value array, The position of the N+1th sensing value array, the N+2th sensing value array and the N−1th to the N+2th horizontal electrodes is used to calculate the position of the touch event.

According to an aspect of the present application, a touch processing device is provided, which is used to reduce the interference when updating pixels, including: a driving circuit module; a sensing circuit module; and a sensor module connected to the driving circuit module and the sensing A processor module of the circuit module for performing non-volatile memory instructions in the memory to implement the following steps: make the sensing circuit module perform the first sensing on a plurality of horizontal electrodes on a touch screen to obtain a plurality of first sensing values; Afterwards, make the sensing circuit module conduct second sensing on the multiple horizontal electrodes to obtain multiple second sensing values; after the interval time, make the sensing circuit module sense the multiple horizontal electrodes The electrodes are sensed for the third time to obtain a plurality of third sensing values; the plurality of first sensing values corresponding to the plurality of horizontal electrodes, the plurality of second sensing values and the plurality of third sensing values The sensing values are respectively summed into a plurality of sums of sensing values; according to the sum of the plurality of sensing values, it is judged that there is an external The conductive object is close to the touch screen; and the driving circuit module is respectively made to send a driving signal from the Nth and the N+1th horizontal electrodes, and the sensing circuit module is sent from a plurality of the touch screen. The longitudinal electrodes sense the driving signal by mutual capacitance to obtain an Nth sensing value array and an N+1th sensing value array; and according to the Nth sensing value array, the N+1th sensing value array , the position of the Nth horizontal electrode and the position of the N+1th horizontal electrode, and calculate the position of a touch event, wherein the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, and the multiple The vertical electrodes are perpendicular to the horizontal axis of the pixels of the touch screen, and the multiple vertical electrodes overlap with the multiple horizontal electrodes to form multiple overlapping regions, and N is a natural number greater than 1.

Furthermore, in order to locate the touch event more precisely, the processor module is further used to: respectively make the driving circuit module send a driving signal from the N-1th and N+2th horizontal electrodes, and make the The sensing circuit module senses the drive signal from the plurality of vertical electrodes to obtain an N-1th sensing value array and an N+2th sensing value array respectively; and according to the N-1th sensing value array Sensing value array, the Nth sensing value array, the N+1th sensing value array, the N+2th sensing value array and the N-1th to the N+2th horizontal The position of the electrode, the bit to calculate the touch event place.

According to an aspect of the present application, a touch control system is provided for reducing interference during pixel update, including: the touch processing device as described above; and a touch screen connected to the touch processing device.

The present application provides a touch processing device or a touch system and a touch processing method thereof, using the sensing results of multiple lateral electrodes at appropriate intervals to determine which sensing result of the lateral electrode is indeed related to touch, or Determine which horizontal electrode's sensing result has nothing to do with touch, and exclude its sensing result from the touch calculation, or perform more than one vertical electrode sensing based on its sensing result, so that the touch calculation It is possible to avoid or at least reduce the influence of electromagnetic interference caused by updating the horizontal axis of pixels.

100: Electronic systems

110:Touch screen

121: the first electrode

122: second electrode

130: Touch processing device

140: Host

141: I/O interface module

142: CPU module

143: Graphics processor module

144:Memory module

145: Network interface module

146:Memory module

210: pixels

220: pixel horizontal axis

221: pixel horizontal axis

222: pixel horizontal axis

300: Touch system

310: touch processing device

311:Connect to the network module

312:Drive circuit module

313: Sensing circuit module

314: processor module

315: interface module

330: stylus

335: touchpad eraser

400: Touch processing method

410~469: Steps

500: Touch processing method

550~560: steps

600: Touch processing method

610~670: Steps

700: Touch processing method

710~775: Steps

FIG. 1 is a schematic diagram of a traditional touch electronic system.

FIG. 2 is a partially enlarged view of the touch screen in FIG. 1 .

FIG. 3 is a schematic block diagram of a touch control system 300 according to an embodiment of the invention.

FIG. 4A is a schematic flowchart of a touch processing method 400 according to an embodiment of the present application.

4B-4D are respectively a schematic flowchart of step 460.

FIG. 5A is a schematic flowchart of a touch processing method 500 according to an embodiment of the present application.

5B-5D are respectively a schematic flowchart of step 560.

FIG. 6 is a schematic flowchart of a touch processing method 600 according to an embodiment of the present application.

FIG. 7A is a schematic flowchart of a touch processing method 700 according to an embodiment of the present application.

FIG. 7B is a schematic flowchart of a touch processing method 700 according to an embodiment of the present application.

FIG. 7C is a schematic flowchart of a touch processing method 700 according to an embodiment of the present application.

FIG. 7D is a schematic flowchart of a touch processing method 700 according to an embodiment of the present application.

The present invention will be described in detail in some embodiments as follows. However, the invention can be broadly implemented in other embodiments besides the disclosed ones. The scope of the present invention is not limited by these embodiments, but is subject to the scope of subsequent patent applications. In order to provide a clearer description and enable those skilled in the art to understand the content of the invention, the various parts in the illustrations are not drawn according to their relative sizes, and the ratio of certain sizes to other related dimensions will be highlighted and It appears exaggerated, and irrelevant details are not fully drawn in order to simplify the illustration.

Please refer to FIG. 3 , which is a schematic block diagram of a touch control system 300 according to an embodiment of the present invention. The touch control system 300 can be a common desktop, laptop, tablet PC, industrial control computer, smart phone or other computer systems with touch function.

The touch system 300 may include a touch processing device 310 , a touch panel or screen 110 connected to the touch processing device, and a host 140 connected to the touch processing device. The touch system 300 may further include one or more stylus 330 and/or touchpad eraser 335 . Hereinafter in this application, the touch panel or screen 120 may be commonly referred to as a touch screen 120, but if it is in an embodiment lacking a display function, those skilled in the art can 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 electrodes 121 may intersect with multiple second electrodes 122 to form multiple sensing points or sensing areas. Likewise, the second electrode 122 can be connected with a plurality of first An electrode 121 is interlaced to form a plurality of sensing points or sensing regions. In some embodiments, the application may refer to the first electrode 121 as the first touch electrode 121 , and may also refer to the second electrode 122 as the second touch electrode 122 . This application also collectively refers to the first electrodes 121 and the second electrodes 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 may be on the same electrode layer, and the plurality of conductive sheets of each first electrode 121 or second electrode 122 are connected by a bridge. The first electrode 121 and the second electrode 122 may also be on different electrode layers stacked one above the other. Unless otherwise specified, the present application is generally applicable to embodiments of a single layer or multiple electrode layers. The first axis and the second axis are generally perpendicular to each other, but the 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 an updating axis of the touch screen 120 .

The touch processing device 310 may include the following hardware circuit modules: an Interconnection Network module 311, a driving circuit module 312, a sensing circuit module 313, a processor module 314 and An interface module 315 . The touch processing device 310 can be implemented in a single integrated circuit, and the integrated circuit can include one or more chips. The touch processing device 310 can also be realized by using multiple integrated circuits and an interconnected circuit board carrying the multiple integrated circuits. The touch processing device 310 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, the present application does not limit the implementation of the touch processing device 310 .

The connection network module 311 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 311 can accept the control command of the processor module 314 for connecting the driving circuit module 112 with any one or more touch electrodes, It is also used to connect the sensing circuit module 313 with any one or more touch electrodes. The connection network module 311 may include a combination of one or more multiplexers (MUX) to implement the above functions.

The driving circuit module 312 may include components such as a clock 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 for processing according to the The control command of the device module 314 provides a driving signal to any one or more touch electrodes through the above-mentioned connection network module 311. Various analog signals or digital signal modulations can be performed 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), vestigial sideband modulation (Vestigial Sideband Modulation), Amplitude Shift Modulation (ASK), Phase Shift Modulation (PSK), Quadrature Amplitude Modulation (QAM), Frequency Shift Modulation (FSK), Continuous Phase Modulation (CPM), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiplexing (OFDM), Pulse Width Modulation (PWM) and other technologies. The driving signal may comprise one or more square waves, sinusoidal waves or any modulated waveforms. The driving circuit module 112 can include one or more channels, and each channel can be connected to any one or more touch electrodes through the connection network module 111 .

The sensing circuit module 313 may include an integrator, a sampler, a clock 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 Devices and other components are used to sense any one or more touch electrodes through the above-mentioned connection network module 311 according to the control command of the processor module 314 . When the touch signal is sent through the above-mentioned one touch electrode, the other touch electrode can sense the touch signal. The sensing circuit module 313 can cooperate with the modulation method performed by the above-mentioned driving circuit module 312 to perform corresponding demodulation on the driving signal sensed by the other touch electrode, so that Restore the information carried by the drive signal. The sensing circuit module 313 can include one or more channels, and each channel can be connected to any one or more touch electrodes through the connection network module 311 . At the same time, each channel can be simultaneously sensed and demodulated.

In one embodiment, the aforementioned driving circuit module 312 and sensing circuit module 313 may include an analog front-end (AFE, analog front-end) circuit. In another embodiment, in addition to the analog front-end circuit, the above-mentioned driving circuit module 312 and sensing circuit module 313 may include a digital back-end (DBE, digital back-end) circuit. When the above-mentioned driving circuit module 312 and sensing circuit module 313 only include analog front-end circuits, digital back-end circuits can be implemented in the processor module 314 .

The processor module 314 may include a digital signal processor, which is used to respectively connect the analog front-end circuits of the above-mentioned driving circuit module 312 and the sensing circuit module 313, and may also connect the above-mentioned driving circuit module 312 and the sensing circuit module 313 respectively. The digital back-end circuit of the circuit module 313. The processor module 314 may include an embedded processor, non-volatile memory and volatile memory. The non-volatile memory can store a common operating system or a real-time operating system, as well as applications executed under the operating system. The aforementioned operating system and application program include a plurality of instructions and data, which can be used to control other modules of the touch processing device 110 after the processor (including the embedded processor and/or digital signal processor) executes these instructions. set, including the connection network module 311 , the driving circuit module 312 , the sensing circuit module 313 and the interface module 315 . For example, the processor module 314 may include 8051 series processors commonly used in the industry, i960 series processors of Intel, Cortex-M series processors of ARM, and the like. The application does not limit the type and number of processors included in the processor module 314 .

The multiple instructions and materials mentioned above can be used to implement the various steps, and processes and methods composed of these steps. Certain instructions, such as arithmetic and logic operations, can operate independently inside the processor module 314 . Other instructions can be used to control other modules of the touch processing device 310 , and these instructions can include the I/O interface of the processor module 314 to control other modules. Other modules can also provide information to the operating system and/or application program executed by the processor module 314 through the I/O interface of the processor module 314 . Those of ordinary skill in the art should have common knowledge of computer organization and architecture, and can understand that the processes and methods mentioned in this application can be implemented by the above-mentioned modules and instructions.

The above-mentioned interface module 315 may include various serial or parallel buses, such as Universal Serial Bus (USB), Integrated Circuit Bus (I ² C), Peripheral Interconnect Standard (PCI), Express Peripheral Interconnect standard (PCI-Express), IEEE 1394 and other industry standard input and output interfaces. The touch processing device 310 is connected to the host 140 through the interface module 315 .

The touch system 300 can include one or more stylus 330 and/or touchpad eraser 335 . The above-mentioned stylus 330 or touchpad eraser 335 can be a transmitter that sends out electrical signals, which can include an active transmitter that actively sends out electrical signals, or a passive transmitter that passively sends out electrical signals, or It is called a reactive transmitter that sends out electrical signals in response to external electrical signals. The above-mentioned stylus 330 or touchpad eraser 335 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. 120 sends out an electrical signal. These electrical signals may adopt one or more modulation methods as described above.

The above-mentioned stylus 330 or touchpad eraser 335 can be a conductor for conducting a driving signal or grounding through the user's hand or body. The above-mentioned stylus 330 or touchpad eraser 335 can be connected to the I/O module 141 of the host 140 in a wired or wireless manner, or the I/O module Other modules under surface module group 141.

The touch processing device 310 can use the touch screen 120 to detect one or more external conductive objects, such as human fingers, palms, or passive stylus 330 or touchpad eraser 335, and can also detect A stylus 130 or a touchpad eraser 135 that emits electrical signals. The touch processing device 310 can use mutual-capacitance or self-capacitance to detect external conductive objects. The above-mentioned stylus 330 or touchpad eraser 335 and the touch processing device 310 can use the above-mentioned signal modulation and corresponding signal demodulation to transmit information by using electrical signals. The touch processing device 310 can use electrical signals to detect one or more proximity positions where the stylus 330 or the touchpad eraser 335 approaches or touches the touch screen 120 , or on the stylus 330 or the touchpad eraser 335 sensor status (such as pressure sensor or button), the direction of the stylus 330 or the touchpad eraser 335, or the inclination angle of the stylus 330 or the touchpad eraser 335 corresponding to the plane of the touch screen 120 Waiting for news.

The host 140 is the main device for controlling the touch control system 300, and may include an I/O interface module 141 connected to the interface module 115, a central processing unit module 142, a graphics processing unit module 143, connected to the A memory module 144 of the CPU module 142 is connected to a network interface module 145 and a memory module 146 of the I/O interface module 141 .

The memory module 146 includes non-volatile memory, common examples are hard disk, 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 LAN standard, IEEE 802.3 wired LAN standard, 3G, 4G, and/or 5G wireless communication Network standards, Bluetooth wireless communication network standards, etc.

The CPU module 142 can be directly or indirectly connected to the above-mentioned I/O interface module 141 , graphics processor module 143 , memory module 144 , network interface module 145 and a memory module 146 . The CPU module 142 may include one or more processors or processor cores. Common processors can include processors with x86 and x64 instruction sets from Intel, AMD, and VIA Electronics, or processors with ARM instruction sets from Apple, Qualcomm, and MediaTek, and can also include other forms of complex computers. Instruction Set (CISC) or Reduced Computer Instruction Set (RISC) processor. The aforesaid operating system and application program include a plurality of instructions and data corresponding to the above instruction set, and these instructions can be used to control other modules of the touch control system 300 after being executed by the CPU module 142 .

The optional graphics processor module 143 is usually used to process the calculation part related to the graphics output. The GPU module 143 can be connected to the aforementioned touch screen 120 for controlling the output of the touch screen 120 . In some applications, the host computer 140 may not require special processing by the graphics processor module 143 , and may directly enable the CPU module 142 to execute calculations related to graphics output.

The host 140 may also include other components or components not shown in FIG. 1 , such as an audio 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 common knowledge of computer structure and architecture, and can understand that the touch control system 300 mentioned in this application is only a schematic description, and the rest of the parts related to the technical features of the invention provided by this application , you need to refer to the specification and the scope of the patent application.

Please refer to Table 1, which is a touch sensing method according to an embodiment of the present invention sensing results. The touch sensing method can be implemented by the touch processing device 310 in FIG. 3 . The touch sensing method can also be instructions stored in the non-volatile memory module and executed by the processor module 314 . In Table 1, the adjacent horizontal electrodes or the first electrodes 121 perform three sensings, and each sensing time is separated by a certain appropriate time. The sensing of the horizontal electrodes referred to in Table 1 can be the above-mentioned mutual capacitance sensing, or the above-mentioned self-capacitance sensing, or the above-mentioned mutual capacitance first and then self-capacitance sensing, or it can be for the active Stylus detection. The present invention does not limit the sensing, as long as it is the sensing of the touch electrodes updated parallel to the horizontal axis of the pixel.

In Table 1, during the first sensing, the N-1th horizontal electrode is disturbed by the update of the horizontal axis of the pixel, so the N-1th horizontal electrode has a sensing value, or its sensing value is greater than a certain value. threshold. In addition, the Nth horizontal electrode also has a touch signal caused by a real touch. If the touch calculation is performed only based on the first sensing result, the interference received by the N-1th horizontal electrode must be included in the calculation.

When the second sensing is performed after an appropriate interval time, since the horizontal axis of the pixels updated on the screen has moved down with time, it is the Nth horizontal electrode that is disturbed instead. At the same time, the touch signal is still sensed by the Nth horizontal electrode, so the N-1st and N+1th horizontal electrodes None of the electrodes sensed a signal.

Then, when the third sensing is performed after an appropriate interval time, since the horizontal axis of the pixels updated on the screen has moved down with time, it is the N+1th horizontal electrode that is disturbed instead. At the same time, the touch signal is still sensed by the Nth horizontal electrode, so the Nth and N+1th horizontal electrodes have sensing values.

After three times of sensing, the touch processing device that implements the touch processing method can be found according to the results in Table 1 that the phenomenon of update interference affects N-1, N, and N+1 respectively over time. horizontal electrodes. However, the Nth horizontal electrode has sensing values in the three sensings, so it can be judged that the sensing values of the Nth horizontal electrode in the first and third sensings are valid and can be used to perform touch computing.

In another embodiment, the touch processing device implementing the touch processing method can add up the sensing values of the three times. Since the sensing value of the Nth horizontal electrode is the largest, it can be considered that the Nth horizontal electrode The sensed value is the real touch signal.

Since the second sensing value is the largest among the three sensing values of the Nth horizontal electrode, the first or third sensing result can be used for calculation. Alternatively, the smallest sensing result among the three sensing values may be used for calculation. When calculating, the sensing value of the adjacent horizontal electrode can be regarded as interference and neglected. For example, when calculating the first or third sensing result, the sensing results of the N−1th and N+1th horizontal electrodes can be ignored.

In one embodiment, after knowing that a touch event has occurred near the Nth horizontal electrode, a driving signal can be sent through the Nth horizontal electrode, and the driving signal can be sensed by mutual capacitance using all the vertical electrodes or the second electrode 122 , to obtain an array of sensing values, wherein each element of the array is relative to the Nth horizontal electrode and one of the multiple vertical electrodes. pole overlapping region. Then, the position of the touch event is calculated according to the array of the sensing value and the position of the Nth horizontal electrode. Since the horizontal axis of the pixel refreshed on the screen has moved down with time, the update interference phenomenon is no longer near the Nth horizontal electrode, so the mutual capacitance sensing results obtained by the vertical electrodes should be comparable to the first or the first time with the update interference phenomenon. Triple sensing results are more accurate. Moreover, all the vertical electrodes or the second electrodes 122 have horizontal update interference phenomenon, which should be the average value for all the vertical electrodes or the second electrodes 122 . Therefore, in calculating the position of the horizontal axis, it will not be affected by unevenness.

In another embodiment, after knowing that the Nth horizontal electrode is the position related to the touch event, the driving signals can be sent to the N-1th, Nth, and N+1th horizontal electrodes in time division, and use All the vertical electrodes or the second electrodes 122 perform mutual capacitive sensing of the driving signal to obtain an array of three sensing values. Then, the position of the touch event is calculated according to the array of the three sensing values and the positions of the N-1, N and N+1 horizontal electrodes. Since the horizontal axis of the pixels updated on the screen has moved down with time, the update interference phenomenon is no longer near the N-1 to N+1th horizontal electrodes, so the mutual capacitance sensing results obtained by the vertical electrodes should be comparable to those with an updated The first or third sensing of disturbing phenomena is more accurate.

In the embodiment shown in Table 1, the interval time between each sensing can be a value stored in advance. For example, in consumer electronics products, the user cannot change the resolution of the touch screen, so the touch processor can perform multiple sensings according to the preset stored interval time.

In another embodiment, the touch processing device 310 or its driver can obtain the resolution, update rate and size of the touch screen 120 from the operating system of the touch system 300, and then calculate the update time of the pixel on the horizontal axis. . And according to the number of pixels on the horizontal axis covered by each horizontal electrode, the interval time is set to be greater than or equal to the product of the two, that is, the two horizontal electrodes sense The measurement interval time will make the different horizontal electrodes receive the maximum interference from the update of the horizontal axis of the pixel. For example, in the above example, when each first electrode 121 covers 12 pixel horizontal axes, and the update time of each pixel horizontal axis is 15.4 us, the time interval between two scans can be greater than 184.8 us.

In some embodiments, if the touch processing device 310 cannot obtain the aforementioned resolution, refresh rate and size of the touch screen 120 , the interval time can be dynamically adjusted. For example, when the touch processing device 310 does not detect any object, the interval time can be corrected until the results shown in Table 2 appear.

Since the sensing values of the three horizontal electrodes are roughly equal after the sum of the three sensings, and the sensing values move sequentially, the touch processing device 310 can understand that the sensing interval time set at this time is appropriate. of. You can use this interval later as a detection parameter.

Please refer to Table 3, which is the sensing result according to another embodiment of the present invention. When one horizontal electrode covers multiple pixel horizontal axes, most of the sensing results will be as shown in Table 1. However, in a few cases, when the horizontal electrodes are sensing, the horizontal axis of the pixel between the horizontal electrodes is updated, and the results shown in Table 3 will appear.

In the embodiment shown in Table 3, when the first sensing occurs, the horizontal axis of the pixel between the N-1th and Nth horizontal electrodes is updated, so both horizontal electrodes sense partial updates interference. During the second sensing, the horizontal axis of the pixel between the N th and N+1 th horizontal electrodes is updated, so the two horizontal electrodes sense partial update interference. During the last sensing, there will be updating of the horizontal axis of the pixel between the N+1th and N+2th horizontal electrodes, so these two horizontal electrodes sense partial update interference.

In the embodiment shown in Table 3, when the first sensing occurs, the horizontal axis of the pixel between the N-1th and Nth horizontal electrodes is updated, so both horizontal electrodes sense partial updates interference. During the second sensing, the horizontal axis of the pixel between the N th and N+1 th horizontal electrodes is updated, so the two horizontal electrodes sense partial update interference. During the last sensing, there will be updating of the horizontal axis of the pixel between the N+1th and N+2th horizontal electrodes, so these two horizontal electrodes sense partial update interference.

After adding the sensing values of the three sensing results, the Nth horizontal electrode The sum of the sensing values will still be higher than the other three horizontal electrodes, so the touch processing device will regard the Nth horizontal electrode as the horizontal electrode receiving the touch signal.

Similarly, since the third sensing value is the smallest among the three sensing values of the Nth horizontal electrode, the smallest sensing result among the three sensing values can be used for calculation, or the two closer sensing values can be calculated. can be ignored. During calculation, the sensing values of two adjacent horizontal electrodes can be regarded as interference and ignored. For example, when calculating the third sensing result, the sensing results of the N-2, N-1, N+1, and N+2th horizontal electrodes can be ignored.

In one embodiment, as in the embodiment described in Table 1, when it is known that a touch event occurs near the Nth horizontal electrode, a driving signal is sent through the Nth horizontal electrode, and all the vertical electrodes or the Nth horizontal electrode are used. The two electrodes 122 perform mutual capacitance sensing of the driving signal to obtain an array of sensing values, wherein each element of the array corresponds to an overlapping area of the Nth horizontal electrode and one of the plurality of vertical electrodes. Then, the position of the touch event is calculated according to the array of the sensing value and the position of the Nth horizontal electrode.

In another embodiment, after knowing that the Nth horizontal electrode is the position related to the touch event, the driving signals can be sent to the N-1th, Nth, and N+1th horizontal electrodes in time division, and use All the vertical electrodes or the second electrodes 122 perform mutual capacitive sensing of the driving signal to obtain an array of three sensing values. Then, the position of the touch event is calculated according to the array of the three sensing values and the positions of the N-1, N and N+1 horizontal electrodes. Since the horizontal axis of the pixels updated on the screen has moved down with time, the update interference phenomenon is no longer near the N-1 to N+1th horizontal electrodes, so the mutual capacitance sensing results obtained by the vertical electrodes should be comparable to those with an updated The first to third sensing results of interference phenomena are more accurate.

Please refer to Table 4 and Table 5, which is the sensing according to another embodiment of the present invention result. Since the size of the external conductive object may be large, and it may also straddle more than two lateral electrodes, the results in Table 4 or Table 5 may appear.

In the embodiment shown in Table 4, the N-1th and Nth horizontal electrodes sense touch signals. Similarly, in the embodiment shown in Table 5, the Nth and N+1th horizontal electrodes sense touch signals.

The touch processing device can determine that two adjacent horizontal electrodes receive touch signals according to the summation results of the three sensings. In the embodiment in Table 4, the sum of the sensing values of the N-1th and Nth horizontal electrodes is greater than the sum of the sensing values of the N+1th horizontal electrodes, so it is judged that The N-1 and Nth horizontal electrodes receive the touch signal, and the N+1th horizontal electrode does not receive the touch signal. In the embodiment of Table 5, the sum of the sensing values of the Nth and N+1th horizontal electrodes is greater than the sum of the sensing values of the N-1th horizontal electrodes, so it is judged that the Nth and N+1th The horizontal electrode receives the touch signal, and the N-1th horizontal electrode does not receive the touch signal.

In a certain embodiment, the touch calculation can be calculated by taking the sensing result that the horizontal electrode that does not receive the touch signal is disturbed. For example, in the embodiment of Table 4, the N+1th horizontal electrode does not receive the touch signal, it is disturbed in the third sensing and has a sensing value, so the third sensing result is used to The touch is calculated, but the sensing value of the N+1th horizontal electrode is ignored. For example, in the embodiment of Table 5, the N-1th horizontal electrode has not received the touch signal, and it has a sensing value due to interference during the first sensing, so the first sensing result is used to calculate the touch, but the sensing value of the N-1th horizontal electrode is ignored.

In another embodiment, similar sensing values of the horizontal electrodes receiving the touch signal can be used for calculation. For example, in the embodiment of Table 4, the results of the last two sensings of the N-1th horizontal electrode are similar, and the results of the first and third sensings of the Nth horizontal electrode are similar, so the third sensing is used. Sensing results are calculated. In the embodiment of Table 5, the first and third sensing results of the Nth horizontal electrode are similar, and the first and second sensing results of the N+1th horizontal electrode are similar, so the first Calculated based on the sensing results.

In yet another embodiment, the calculation may be performed by taking the average of similar sensing values of the horizontal electrodes receiving the touch signal. For example, in the embodiment of Table 4, the last two sensing results of the N-1th horizontal electrode are similar, and the first and third sensing results of the Nth horizontal electrode are similar, so the N-th horizontal electrode is used. The average of the last two sensing results of one horizontal electrode, and the first and third sensing results of the Nth horizontal electrode are calculated. In the embodiment of Table 5, the Nth horizontal electrode The first and third sensing results are similar, and the first and second sensing results of the N+1th horizontal electrode are similar, so the first and third sensing results of the Nth horizontal electrode are used and the average of the first and second sensing results of the N+1th horizontal electrode are calculated.

In one embodiment, when it is known that the touch event occurs near the Nth and N+1th horizontal electrodes, a driving signal is sent through the Nth and N+1th horizontal electrodes, using all the vertical electrodes or The second electrode 122 performs mutual capacitance sensing of the driving signal to obtain two arrays of sensing values. Then, the position of the touch event is calculated according to the array of the two sensing values and the positions of the Nth and N+1th horizontal electrodes.

In another embodiment, after knowing that the touch event occurred on the Nth and N+1th horizontal electrodes, the N-1st, Nth, N+1th, and Nth horizontal electrodes can be time-shared The +2 horizontal electrodes send a driving signal, and all the vertical electrodes or the second electrodes 122 are used for mutual capacitance sensing of the driving signal, so as to obtain an array of four sensing values. Then, the position of the touch event is calculated according to the array of the three sensing values and the positions of the N−1, N, N+1 and N+2 horizontal electrodes. Since the horizontal axis of the pixels updated on the screen has moved down with time, the update interference phenomenon is no longer near the N-1 to N+2th horizontal electrodes, so the mutual capacitance sensing results obtained by the vertical electrodes should be comparable to those with an updated The first to third sensing results of interference phenomena are more accurate.

Those of ordinary skill in the art can understand that although in the embodiments of Tables 1 to 5, only three sensings are used as an implementation example, the scope of the present invention is not limited to three sensings, and can be extended to more than three sensings example of . Those skilled in the art should be able to self-promote based on the content of the present invention.

In summary, the present application provides a touch control method for a touch processor, which uses the sensing results of multiple horizontal electrodes at appropriate intervals to determine which horizontal electrode has a sensing junction. If it is indeed related to touch, or determine which horizontal electrode has no sensing result related to touch, and exclude its sensing result from the touch calculation, or make more than one vertical survey based on its sensing result Electrode sensing enables touch computing to avoid or at least reduce the influence of electromagnetic interference caused by updates on the horizontal axis of pixels.

Please refer to FIG. 4A , which is a schematic flowchart of a touch processing method 400 according to an embodiment of the present invention, which can be applied to the embodiments in Table 1 and Table 3. The touch processing method 400 can be implemented by the touch processing device 310 in FIG. 3 . The touch processing method 400 can also be an instruction stored in a non-volatile memory module and executed by the processor module 314 . The touch processing method 400 includes but not limited to the following steps. Step 410: Sensing the plurality of sensing electrodes on a touch screen for the first time to obtain a plurality of first sensing values; Step 420: After an interval time, performing the first sensing on the plurality of sensing electrodes Sensing twice to obtain a plurality of second sensing values; Step 430: after the interval time, performing a third sensing to the plurality of sensing electrodes to obtain a plurality of third sensing values; Step 440 : Summing up the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values corresponding to the plurality of sensing electrodes into a plurality of sensing value sums; step 450 : According to the sum of the plurality of sensing values, it is judged that an external conductive object is close to the touch screen near the Nth sensing electrode among the plurality of sensing electrodes; Step 460: According to the plurality of first sensing values, the One of the plurality of second sensing values and the plurality of third sensing values is used to determine a position of the external conductive object relative to the plurality of sensing electrodes. Wherein, the plurality of sensing electrodes are parallel to the horizontal axes of pixels of the touch screen.

Step 460 may include three different embodiments. Please refer to FIG. 4B , which is a schematic flowchart of a first embodiment of step 460 of the touch processing method 400 . In the first embodiment, step 461: ignore the first sensing value corresponding to the N-1th sensing electrode first sensing value; and step 462 : judging the position of the external conductive object relative to the plurality of sensing electrodes according to the plurality of first sensing values. Please refer to FIG. 4C , which is a schematic flowchart of a second embodiment of step 460 of the touch processing method 400 . In the second embodiment, step 463: ignore the third sensing value corresponding to the N+1th sensing electrode among the plurality of third sensing values; and step 464: according to the plurality of third sensing values The measured value is used to determine the position of the external conductive object relative to the plurality of sensing electrodes. Please refer to FIG. 4D , which is a schematic flowchart of a third embodiment of step 460 of the touch processing method 400 . In the third embodiment, step 465: finding the minimum among the first sensing value, the second sensing value and the third sensing value corresponding to the Nth sensing electrode; step 466: Find one of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values corresponding to the minimum; step 467: ignore the minimum corresponding to the One of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values corresponds to the N−1th sensing electrode and the N+1th sensing electrode The sensing value of; optional but not necessary step 468: ignore the minimum corresponding to the plurality of first sensing values, the plurality of second sensing values or the plurality of third sensing values among them One of them corresponds to the sensed values of the N-2th sensing electrode and the N+2th sensing electrode; Step 469: According to the plurality of first sensing values corresponding to the smallest one, the plurality of The second sensing value or one of the plurality of third sensing values is used to determine the position of the external conductive object relative to the plurality of sensing electrodes.

According to an embodiment of the present invention, the touch processing method 400 may be executed by the touch processing device 310 in FIG. 3 . The sensing circuit module 313 is used to connect the plurality of sensing electrodes or the first electrodes 121 and is responsible for performing steps 410 , 420 and 430 . The processor module 314 is used to connect to the sensing circuit module 313 and is responsible for executing steps 340 , 350 and 360 , and steps 361 - 369 in the three embodiments included in step 360 . The processor module 314 can be an embedded processor or an independent An independent processor implements the above steps by executing software or instructions.

In other words, according to the embodiment, the present invention provides a touch processing device for reducing interference when updating pixels, including a sensing circuit and a processor connected to the sensing circuit. The sensing circuit is used for: first sensing a plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; Sensing a second time to obtain a plurality of second sensing values; and after the interval time, performing a third sensing to the plurality of sensing electrodes to obtain a plurality of third sensing values. The processor is used for: summing the plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values corresponding to the plurality of sensing electrodes into a plurality of sensing values respectively sum; according to the sum of the plurality of sensing values, it is judged that there is an external conductive object near the Nth sensing electrode in the plurality of sensing electrodes approaching the touch screen; according to the plurality of first sensing values, the plurality of One of the second sensing value and the plurality of third sensing values is used to determine a position of the external conductive object relative to the plurality of sensing electrodes. Wherein, the plurality of sensing electrodes are parallel to the horizontal axes of pixels of the touch screen.

In an embodiment, the above-mentioned processor is further configured to: ignore the first sensing value corresponding to the N-1th sensing electrode among the plurality of first sensing values; and The measured value is used to determine the position of the external conductive object relative to the plurality of sensing electrodes. In another embodiment, the above-mentioned processor is further configured to: ignore the third sensing value corresponding to the N+1th sensing electrode among the plurality of third sensing values; and The sensing value is used to determine the position of the external conductive object relative to the plurality of sensing electrodes. In yet another embodiment, the above-mentioned processor is further configured to: find the minimum of the first sensing value, the second sensing value and the third sensing value corresponding to the Nth sensing electrode ; Find one of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values corresponding to the minimum; ignore the plurality of corresponding minimum values First One of the sensing values, the plurality of second sensing values, or the plurality of third sensing values corresponds to the sensing value of the N−1th sensing electrode and the N+1th sensing electrode ; and according to one of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values corresponding to the smallest one, it is judged that the external conductive object is relative to the plurality of sensing values. This position of the strip sensing electrode. In a variation, the processor is further configured to: ignore one of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values corresponding to the minimum , corresponding to the sensing values of the N−2th sensing electrode and the N+2th sensing electrode.

According to an embodiment of the present invention, the present invention provides an electronic system for reducing interference when updating pixels, comprising: a touch screen and a touch processing device connected to the touch screen. The touch processing device includes a sensing circuit and a processor connected to the sensing circuit. The sensing circuit is used for: first sensing the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values; after an interval time, performing the sensing on the plurality of sensing electrodes Sensing a second time to obtain a plurality of second sensing values; and after the interval time, performing a third sensing to the plurality of sensing electrodes to obtain a plurality of third sensing values. The processor is used for: summing the plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values corresponding to the plurality of sensing electrodes into a plurality of sensing values respectively sum; according to the sum of the plurality of sensing values, it is judged that there is an external conductive object near the Nth sensing electrode in the plurality of sensing electrodes approaching the touch screen; according to the plurality of first sensing values, the plurality of One of the second sensing value and the plurality of third sensing values is used to determine a position of the external conductive object relative to the plurality of sensing electrodes. Wherein, the plurality of sensing electrodes are parallel to the horizontal axes of pixels of the touch screen.

Please refer to FIG. 5A , which is a schematic flowchart of a touch processing method 500 according to an embodiment of the present invention, which can be applied to the embodiments in Table 4 and Table 5 . the touch The processing method 500 can be implemented by the touch processing device 310 in FIG. 3 . The touch processing method 500 can also be an instruction stored in a non-volatile memory module and executed by the processor module 314 . The touch processing method 500 includes but not limited to the following steps, wherein steps 410 , 420 , 430 are the same as 440 and the steps shown in FIG. 4A , and will not be described in detail here. Step 550 : According to the sum of the plurality of sensing values, determine that there is an external conductive object approaching the touch screen near at least two adjacent sensing electrodes among the plurality of sensing electrodes. For example, when at least two adjacent sensing values are greater than a threshold, it can be determined that there is an external conductive object approaching the touch screen near the at least two sensing electrodes corresponding to the adjacent sensing values. Or, when there are at least two adjacent sensing values greater than the adjacent sensing values, that is, when the difference is greater than another threshold value, it can be judged that at least two adjacent sensing values correspond to An external conductive object near the sensing electrode is close to the touch screen. Next, step 560 is executed, according to one of the plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values, it is judged that the external conductive object is relative to the plurality of sensing electrodes. of a location. For example, in the embodiment of Table 4, step 550 can determine that the N-1th and Nth sensing electrodes are the at least two sensing electrodes, and in the embodiment of Table 5, step 550 can determine that the Nth The bar and the N+1th sensing electrode are the at least two sensing electrodes.

Please refer to FIG. 5B , which is a schematic flowchart of an embodiment of step 560 . Step 561: According to the largest among the first sensing value, the second sensing value and the third sensing value corresponding to one of the adjacent sensing electrodes of the at least two sensing electrodes, determine the largest one Corresponding to any one of the first sensing, the second sensing or the third sensing. Step 562 : Ignore the sensing value corresponding to the adjacent sensing electrode among one of the first sensing, the second sensing or the third sensing corresponding to the largest one. Step 563: According to one of the first sensing, the second sensing or the third sensing corresponding to the largest one, determine that the external conductive object is relatively at the position of the plurality of sensing electrodes. For example, in the embodiment of Table 4, the adjacent sensing electrode in step 561 may be the N+1th one, which is the largest among the first sensing value, the second sensing value and the third sensing value. is the third sensing value, and therefore corresponds to the third sensing. In step 462, ignore the sensing value (update disturbance value) corresponding to the N+1th sensing electrode in the third sensing, and then in step 562, according to the plurality of third sensing values , to determine the position of the external conductive object relative to the plurality of sensing electrodes. For example, in the embodiment of Table 4, the adjacent sensing electrode in step 561 may be the N-1th one, which is the largest among the first sensing value, the second sensing value and the third sensing value. is the first sensing value, so it corresponds to the first sensing. In step 562, ignore the sensing value (update disturbance value) corresponding to the N-1th sensing electrode in the first sensing, and then in step 563, according to the plurality of first sensing values , to determine the position of the external conductive object relative to the plurality of sensing electrodes.

Please refer to FIG. 5C , which is a schematic flowchart of another embodiment of step 560 . Step 464: According to each of the at least two sensing electrodes, the one of the first sensing value, the second sensing value, and the third sensing value that has the largest difference with the other two is ignored. The plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values corresponding to the largest one. Step 565: According to one of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values that are not ignored, ignore an interval between the at least two sensing electrodes Sensed values of adjacent sensing electrodes. Step 566, according to one of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values that are not ignored, determine whether the external conductive object is relative to the plurality of sensing values. The position of the measuring electrode. For example, in step 564 of the embodiment in Table 4, the difference between the first sensing value of the N-1th sensing electrode and the other two is the largest, so the multiple first sensing values are ignored, and the Nth sensing electrode The difference between the second sensing value of the measuring electrode and the other two is the largest, so the plurality of second sensing values are ignored. step In 465 , among the plurality of third sensing values that are not ignored, the sensing value corresponding to the adjacent sensing electrode (the N+1 th bar) is ignored. In step 566, the position of the external conductive object relative to the plurality of sensing electrodes is determined according to the plurality of third sensing values. For example, in step 564 of the embodiment in Table 5, the difference between the second sensing value of the Nth sensing electrode and the other two is the largest, so the plurality of second sensing values are ignored, and the N+1th sensing electrode The difference between the third sensing value of the measuring electrode and the other two is the largest, so the plurality of third sensing values are ignored. In step 565 , among the plurality of first sensing values that are not ignored, the sensing value corresponding to the adjacent sensing electrode (the N−1th bar) is ignored. In step 566, the position of the external conductive object relative to the plurality of sensing electrodes is determined according to the plurality of first sensing values.

Please refer to FIG. 5D , which is a schematic flowchart of another embodiment of step 560 . Step 567: According to each of the at least two sensing electrodes, find out the one of the first sensing value, the second sensing value and the third sensing value which has the largest difference with the other two, And take the average sensing value of the other two. Step 568: Determine the position of the external conductive object relative to the plurality of sensing electrodes according to the average sensing value corresponding to each of the at least two sensing electrodes. For example, in the embodiment of Table 4, the last two sensing results of the N-1th horizontal electrode are similar, and the first and third sensing results of the Nth horizontal electrode are similar, so in step 567 , is calculated by using the average of the last two sensing results of the N-1th horizontal electrode, and the first and third sensing results of the Nth horizontal electrode. In the embodiment of Table 5, the first and third sensing results of the Nth horizontal electrode are similar, and the first and second sensing results of the N+1th horizontal electrode are similar, so in step 567 Among them, the average of the first and third sensing results of the Nth horizontal electrode and the average of the first and second sensing results of the N+1th horizontal electrode are used for calculation.

In one embodiment, the present application provides a touch processing device for reducing image The interference when pixel is updated includes: a sensing circuit and a processor connected to the sensing circuit. The sensing circuit is used for: first sensing a plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; Sensing a second time to obtain a plurality of second sensing values; and after the interval time, performing a third sensing to the plurality of sensing electrodes to obtain a plurality of third sensing values. The processor is used for: summing the plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values corresponding to the plurality of sensing electrodes into a plurality of sensing values respectively sum; according to the sum of the plurality of sensing values, it is judged that there is an external conductive object close to the touch screen near at least two adjacent sensing electrodes among the plurality of sensing electrodes; and according to the plurality of first sensing values , one of the plurality of second sensing values and the plurality of third sensing values to determine a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes and the plurality of sensing electrodes The horizontal axes of the pixels of the touch screen are parallel to each other.

In one example, the processor is further configured to: according to the first sensing value, the second sensing value and the third sensing value corresponding to one of the sensing electrodes adjacent to the at least two sensing electrodes The largest among them, judge that the largest corresponds to which one of the first sensing, the second sensing or the third sensing; ignore the first sensing, the second sensing corresponding to the largest Among one of the second sensing or the third sensing, the sensing value corresponding to the adjacent sensing electrode; and according to the first sensing, the second sensing corresponding to the largest or one of the third sensings to determine the position of the external conductive object relative to the plurality of sensing electrodes.

In another example, the processor is further configured to: according to each of the at least two sensing electrodes, the first sensing value, the second sensing value and the third sensing value are compared with each other The difference between the other two is the largest, ignoring the plurality of first sensing values, the plurality of second sensing values or the plurality of third sensing values corresponding to the largest; The first sensing value, the One of the plurality of second sensing values or the plurality of third sensing values, ignoring the sensing value of the sensing electrode adjacent to one of the at least two sensing electrodes; and according to the plurality of non-ignored One of the first sensing value, the plurality of second sensing values or the plurality of third sensing values is used to determine the position of the external conductive object relative to the plurality of sensing electrodes.

In yet another example, the processor is further configured to: find out the first sensing value, the second sensing value and the third sensing value according to each of the at least two sensing electrodes Among them, the difference between the other two is the largest, and the average sensing value of the other two is taken; and according to the average sensing value corresponding to each sensing electrode of the at least two sensing electrodes, it is judged that the external conductive object is relatively at the position of the plurality of sensing electrodes.

In one embodiment, the present application provides an electronic system for reducing interference when updating pixels, comprising: a touch screen and a touch processing device connected to the touch screen. The touch processing device includes: a sensing circuit; and a processor connected to the sensing circuit. The sensing circuit is used for: first sensing the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values; after an interval time, performing the sensing on the plurality of sensing electrodes Sensing a second time to obtain a plurality of second sensing values; and after the interval time, performing a third sensing to the plurality of sensing electrodes to obtain a plurality of third sensing values. The processor is configured to: sum the plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values corresponding to the plurality of sensing electrodes into a plurality of sensing values respectively. The sum of the measured values; according to the sum of the plurality of sensing values, it is determined that there is an external conductive object close to the touch screen near at least two adjacent sensing electrodes among the plurality of sensing electrodes; and according to the plurality of first sensing electrodes Measured value, one of the plurality of second sensing values and the plurality of third sensing values to determine a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes The horizontal axes of the pixels of the touch screen are parallel to each other.

Please refer to FIG. 6 , which is a schematic flow chart of a touch processing method 600 according to an embodiment of the present invention, which can be applied to the embodiment in Table 2, and the obtained interval time can be used in FIG. 4A- D and the embodiment of Fig. 5A-D. The touch processing method 600 can be implemented by the touch processing device 310 in FIG. 3 . The touch processing method 600 can also be instructions stored in the non-volatile memory module, and executed by the processor module 314 . Step 610: Set an interval time, for example, give an initial value. Step 620: Make sure that the touch screen does not have any external conductive objects in close proximity. Step 630: Sensing the plurality of sensing electrodes on the touch screen three times to respectively obtain a plurality of first sensing values, a plurality of second sensing values and a plurality of third sensing values, each sensing at this interval. This step 530 is the same as steps 310-330. Step 640: Determine whether there is only a single maximum value among the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values? If yes, go to step 650 , otherwise go to step 670 . Step 650: Determine if the three maximum values correspond to three adjacent sensing electrodes? If yes, go to step 660 , otherwise go to step 670 . Step 660: Store the interval time. Step 670: Adjust the interval time. For example, when the three maximum values correspond to the same or two adjacent sensing electrodes, then the interval time is increased. For example, when three maximum values correspond to three non-adjacent sensing electrodes, the interval time is reduced.

In one embodiment, the present application provides a touch processing device, which is used to obtain an interval time, so as to use the interval time to execute a touch processing method for reducing interference when updating pixels, including: a sensing circuit and a connection to a processor of the sensing circuit. The sensing circuit is used for: first sensing a plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; Sensing for the second time to obtain a plurality of second sensing values; and after the interval time, performing a third sensing operation on the plurality of sensing electrodes sensing to obtain a plurality of third sensing values. The processor is used for: judging whether there is only a single maximum value among the plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values; when the plurality of first sensing values value, the plurality of second sensing values and the plurality of third sensing values, when there is only a single maximum value, it is judged whether the three maximum values correspond to three adjacent sensing electrodes; if the three maximum values The interval time is stored corresponding to three adjacent sensing electrodes, wherein the plurality of sensing electrodes are parallel to the horizontal axis of the pixel of the touch screen.

In one embodiment, the present application provides an electronic system for obtaining an interval time, so as to use the interval time to execute a touch processing method for reducing interference when updating pixels, including: a touch screen; a sensing circuit; and a processor connected to the sensing circuit. The sensing circuit is used for: first sensing a plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; Sensing a second time to obtain a plurality of second sensing values; and after the interval time, performing a third sensing to the plurality of sensing electrodes to obtain a plurality of third sensing values. The processor is used for: judging whether there is only a single maximum value among the plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values; when the plurality of first sensing values value, the plurality of second sensing values and the plurality of third sensing values, when there is only a single maximum value, it is judged whether the three maximum values correspond to three adjacent sensing electrodes; if the three maximum values The interval time is stored corresponding to three adjacent sensing electrodes, wherein the plurality of sensing electrodes are parallel to the horizontal axis of the pixel of the touch screen.

Please refer to FIG. 7A , which is a schematic flowchart of a touch processing method 700 according to an embodiment of the present invention, which can be applied to the embodiments in Table 1 and Table 3. The touch processing method 700 can be implemented by the touch processing device 310 in FIG. 3 . The touch processing method 700 can also be an instruction stored in a non-volatile memory module and executed by the processor module 314 .

Step 710: Perform first sensing on multiple horizontal electrodes or first electrodes on a touch screen to obtain multiple first sensing values.

Step 720 : After an interval, perform second sensing on the plurality of horizontal electrodes to obtain a plurality of second sensing values. The interval time may be the interval time found in the embodiment shown in FIG. 6 .

Step 730 : After the interval time, perform a third sensing on the plurality of horizontal electrodes to obtain a plurality of third sensing values.

Step 740 : Summing up the plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values corresponding to the plurality of horizontal electrodes respectively to form a plurality of sums of sensing values.

Step 750 : According to the sum of the plurality of sensing values, it is determined that an external conductive object approaches the touch screen near the Nth horizontal electrode among the plurality of horizontal electrodes.

Step 760 : Send out a driving signal from the Nth horizontal electrode, and sense the driving signal from a plurality of vertical electrodes with mutual capacitance to obtain an array of sensing values.

Step 770: Calculate the position of the touch event according to the position of the sensing value array and the Nth horizontal electrode.

Please refer to FIG. 7B , which is a schematic flowchart of a touch processing method 700 according to an embodiment of the present invention, which can be applied to the embodiments in Table 1 and Table 3. The touch processing method 700 shown in FIG. 7B is a modification of the embodiment shown in FIG. 7A . After step 750 is executed, the touch processing method 700 shown in FIG. 7B continues to execute step 765 .

Step 765 : Send out driving signals from the N−1 th, N th and N+1 th horizontal electrodes respectively, and sense the driving signals from the mutual capacitance of a plurality of vertical electrodes to obtain three sensing value arrays. Next, the process executes step 775 .

Step 775 : Calculate the position of the touch event according to the three sensing value arrays and the positions of the N−1 th to N+1 th horizontal electrodes.

Please refer to FIG. 7C , which is a schematic flowchart of a touch processing method 700 according to an embodiment of the present invention, which can be applied to the embodiments in Table 4 and Table 5 . The touch processing method 700 shown in FIG. 7C is a modification of the embodiment shown in FIG. 7A . After step 740 is executed, the touch processing method 700 shown in FIG. 7C continues to execute step 752 .

Step 752 : According to the sum of the plurality of sensing values, it is determined that there is an external conductive object close to the touch screen near the Nth and N+1th horizontal electrodes among the plurality of horizontal electrodes.

Step 762 : sending driving signals from the N th and N+1 th horizontal electrodes respectively, and mutual capacitance sensing of the driving signals by the plurality of vertical electrodes to obtain two sensing value arrays.

Step 764 : Calculate the position of the touch event according to the two sensing value arrays and the positions of the Nth and N+1th horizontal electrodes.

Please refer to FIG. 7D , which is a schematic flowchart of a touch processing method 700 according to an embodiment of the present invention, which can be applied to the embodiments in Table 4 and Table 5 . The touch processing method 700 shown in FIG. 7D is a modification of the embodiment shown in FIG. 7C . After step 752 is executed, the touch processing method 700 shown in FIG. 7B continues to execute step 764 .

Step 764 : sending driving signals from the N−1 th to N+2 th horizontal electrodes respectively, and mutual capacitance sensing of the driving signals by multiple vertical electrodes to obtain four arrays of sensing values.

Step 774 : Calculate the position of the touch event according to the four sensing value arrays and the positions of the N−1 th to N+2 th horizontal electrodes.

According to an aspect of the present application, a touch processing method is provided, which is used for reducing interference when updating pixels. The touch processing method includes: a plurality of horizontal electrodes on a touch screen performing a first sensing to obtain a plurality of first sensing values; after an interval, performing a second sensing to the plurality of horizontal electrodes to obtain a plurality of second sensing values; Afterwards, a third sensing is performed on the plurality of horizontal electrodes to obtain a plurality of third sensing values; corresponding to the plurality of first sensing values, the plurality of second sensing values value and the plurality of third sensing values are respectively summed into a plurality of sensing value sums; according to the plurality of sensing value sums, it is judged that there is an external conductive object near the Nth transverse electrode among the plurality of transverse electrodes. A touch screen; a drive signal is sent from the Nth horizontal electrode, and the drive signal is sensed by mutual capacitance from a plurality of vertical electrodes of the touch screen to obtain an Nth array of sensing values; and according to the Nth sensor measuring the position of the value array and the Nth horizontal electrode, and calculating the position of a touch event, wherein, the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, and the multiple vertical electrodes are parallel to the touch screen The horizontal axes of the pixels are perpendicular to each other, and the plurality of vertical electrodes and the plurality of horizontal electrodes overlap each other to form a plurality of overlapping regions, and N is a natural number greater than 1.

Furthermore, in order to locate the touch event more precisely, the touch processing method further includes: sending driving signals from the N-1th and N+1th horizontal electrodes respectively, and mutual capacitance from the plurality of vertical electrodes Sensing the driving signal to respectively obtain an N-1th sensing value array and an N+1th sensing value array; and according to the N-1th sensing value array, the Nth sensing value array, The position of the N+1th sensing value array and the N−1th to the N+1th horizontal electrodes is used to calculate the position of the touch event.

According to an aspect of the present application, a touch processing device is provided, which is used to reduce the interference when updating pixels, including: a driving circuit module; a sensing circuit module; and a sensor module connected to the driving circuit module and the sensing A processor module of the circuit module is used to execute instructions in the non-volatile memory to realize the following steps: make the sensing circuit module control a touch screen A plurality of horizontal electrodes are sensed for the first time to obtain a plurality of first sensing values; a second sensing value; after the interval time, make the sensing circuit module sense the plurality of horizontal electrodes for the third time to obtain a plurality of third sensing values; corresponding to the plurality of horizontal electrodes The plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values of the electrodes are respectively summed into a plurality of sums of sensing values; according to the sum of the plurality of sensing values, it is judged that the There is an external conductive object close to the touch screen near the Nth horizontal electrode among the multiple horizontal electrodes; the driving circuit module is made to send a driving signal to the Nth horizontal electrode, and the sensing circuit module is activated from the touch screen. Multiple longitudinal electrodes of the control screen sense the drive signal by mutual capacitance to obtain an Nth array of sensing values; and calculate the position of a touch event according to the position of the array of sensing values and the Nth horizontal electrode, Wherein, the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, the multiple vertical electrodes are perpendicular to the horizontal axis of the pixel of the touch screen, and the multiple vertical electrodes and the multiple horizontal electrodes intersect each other stacked to form multiple overlapping regions, and N is a natural number greater than 1.

Furthermore, in order to locate the touch event more precisely, the processor module is further used to: respectively make the driving circuit module send a driving signal from the N-1th and N+1th horizontal electrodes, and make the The sensing circuit module senses the drive signal from a plurality of longitudinal electrode mutual capacitances to respectively obtain an N-1 array of sensing values and an array of N+1 sensing values; and according to the N-1 array of sensing values Positions of the measured value array, the Nth sensed value array, the N+1th sensed value array, and the N−1th to the N+1th horizontal electrodes are used to calculate the position of the touch event.

According to an aspect of the present application, a touch processing method is provided, which is used to reduce the interference when updating pixels, including: first sensing multiple horizontal electrodes on a touch screen to obtain multiple first senses measured value; after an interval time, the plurality of horizontal electrodes are subjected to a second Sensing for the second time to obtain a plurality of second sensing values; after the interval time, the plurality of horizontal electrodes are sensed for the third time to obtain a plurality of third sensing values; corresponding to the plurality of horizontal electrodes The plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values of the electrodes are respectively summed into a plurality of sums of sensing values; according to the sum of the plurality of sensing values, it is judged that the There is an external conductive object close to the touch screen near two adjacent Nth and N+1th horizontal electrodes among the plurality of horizontal electrodes; a driving signal, and sensing the driving signal from a plurality of vertical electrodes mutual capacitance of the touch screen to obtain an Nth sensing value array and an N+1th sensing value array; and according to the Nth sensing value array, the N+1th sensing value array, the position of the Nth horizontal electrode and the position of the N+1th horizontal electrode, and calculate the position of a touch event, wherein the plurality of horizontal electrodes and the The transverse axes of the pixels of the touch screen are parallel to each other, the plurality of longitudinal electrodes are perpendicular to the transverse axes of the pixels of the touch screen, and the plurality of longitudinal electrodes and the plurality of transverse electrodes overlap each other to form a plurality of overlapping regions, N is a natural number greater than 1.

Furthermore, in order to locate the touch event more precisely, the touch processing method further includes: sending driving signals from the N-1th and N+2th horizontal electrodes respectively, and mutual capacitance from the plurality of vertical electrodes Sensing the driving signal to respectively obtain an N-1th sensing value array and an N+2th sensing value array; and according to the N-1th sensing value array, the Nth sensing value array, The position of the N+1th sensing value array, the N+2th sensing value array and the N−1th to the N+2th horizontal electrodes is used to calculate the position of the touch event.

According to an aspect of the present application, a touch processing device is provided, which is used to reduce the interference when updating pixels, including: a driving circuit module; a sensing circuit module; and a sensor module connected to the driving circuit module and the sensing A processor module of the circuit module is used to execute instructions in the non-volatile memory to realize the following steps: make the sensing circuit module control a touch screen A plurality of horizontal electrodes are sensed for the first time to obtain a plurality of first sensing values; a second sensing value; after the interval time, make the sensing circuit module sense the plurality of horizontal electrodes for the third time to obtain a plurality of third sensing values; corresponding to the plurality of horizontal electrodes The plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values of the electrodes are respectively summed into a plurality of sums of sensing values; according to the sum of the plurality of sensing values, it is judged that the There is an external conductive object close to the touch screen near two adjacent Nth and N+1th horizontal electrodes among the plurality of horizontal electrodes; +1 horizontal electrode sends a driving signal, and makes the sensing circuit module sense the driving signal from the mutual capacitance of multiple vertical electrodes of the touch screen to obtain an Nth sensing value array and an N+1th sensing value array. a measurement array; and according to the Nth sensing value array, the N+1th sensing value array, the position of the Nth horizontal electrode and the position of the N+1th horizontal electrode, calculate a touch The position of the event, wherein, the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, the multiple vertical electrodes are perpendicular to the horizontal axis of the pixel of the touch screen, and the multiple vertical electrodes are parallel to the multiple The lateral electrodes overlap each other to form multiple overlapping regions, and N is a natural number greater than 1.

Furthermore, in order to locate the touch event more precisely, the processor module is further used to: respectively make the driving circuit module send a driving signal from the N-1th and N+2th horizontal electrodes, and make the The sensing circuit module senses the drive signal from the plurality of vertical electrodes to obtain an N-1th sensing value array and an N+2th sensing value array respectively; and according to the N-1th sensing value array Sensing value array, the Nth sensing value array, the N+1th sensing value array, the N+2th sensing value array and the N-1th to the N+2th horizontal The position of the electrode, calculate the position of the touch event.

According to an aspect of the present application, a touch control system is provided for reducing interference during pixel update, including: the touch processing device as described above; and a touch screen connected to the touch processing device.

The present application provides a touch processing device or a touch system and a touch processing method thereof, using the sensing results of multiple lateral electrodes at appropriate intervals to determine which sensing result of the lateral electrode is indeed related to touch, or Determine which horizontal electrode's sensing result has nothing to do with touch, and exclude its sensing result from the touch calculation, or perform more than one vertical electrode sensing based on its sensing result, so that the touch calculation It is possible to avoid or at least reduce the influence of electromagnetic interference caused by updating the horizontal axis of pixels.

700: Touch processing method

710~775: Steps

Claims (9)

A touch processing method for reducing noise when updating pixels, comprising: performing first sensing on multiple horizontal electrodes on a touch screen to obtain multiple first sensing values; After an interval time, perform second sensing on the plurality of horizontal electrodes to obtain a plurality of second sensing values; After the interval time, perform a third sensing on the plurality of horizontal electrodes to obtain a plurality of third sensing values; summing up the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values corresponding to the plurality of horizontal electrodes to form a plurality of sums of sensing values; According to the sum of the plurality of sensing values, it is determined that an external conductive object is close to the touch screen near the Nth horizontal electrode among the plurality of horizontal electrodes; Sending a driving signal from the Nth horizontal electrode, and sensing the driving signal from a plurality of vertical electrodes of the touch screen with mutual capacitance to obtain an Nth sensing value array; and calculating the position of a touch event according to the position of the Nth sensing value array and the Nth horizontal electrode, Wherein, the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, the multiple vertical electrodes are perpendicular to the horizontal axis of the pixel of the touch screen, and the multiple vertical electrodes and the multiple horizontal electrodes intersect each other stacked to form multiple overlapping regions, and N is a natural number greater than 1. For example, the touch processing method of item 1 of the scope of the patent application includes: Send driving signals from the N-1th and N+1th horizontal electrodes respectively, and send out driving signals from the multiple vertical electrodes Sensing the driving signal by mutual capacitance between poles to obtain an N-1th sensing value array and an N+1th sensing value array respectively; and According to the N-1th sensing value array, the Nth sensing value array, the N+1th sensing value array and the positions of the N-1th to the N+1th horizontal electrodes, Calculate the location of the touch event. A touch processing device for reducing interference when updating pixels, comprising: A driving circuit module; a sensing circuit module; and A processor module connected to the driving circuit module and the sensing circuit module is used to execute instructions in the non-volatile memory to realize the following steps: making the sensing circuit module perform first sensing on a plurality of horizontal electrodes on a touch screen to obtain a plurality of first sensing values; After an interval time, make the sensing circuit module perform second sensing on the plurality of horizontal electrodes to obtain a plurality of second sensing values; After the interval time, make the sensing circuit module sense the plurality of horizontal electrodes for the third time to obtain a plurality of third sensing values; summing up the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values corresponding to the plurality of horizontal electrodes to form a plurality of sums of sensing values; According to the sum of the plurality of sensing values, it is determined that an external conductive object is close to the touch screen near the Nth horizontal electrode among the plurality of horizontal electrodes; making the driving circuit module send a driving signal to the Nth horizontal electrode, and making the sensing circuit module sense the driving signal from the mutual capacitance of the vertical electrodes of the touch screen to obtain a an Nth sensing value array; and calculating the position of a touch event according to the position of the sensing value array and the Nth horizontal electrode, Wherein, the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, the multiple vertical electrodes are perpendicular to the horizontal axis of the pixel of the touch screen, and the multiple vertical electrodes and the multiple horizontal electrodes intersect each other stacked to form multiple overlapping regions, and N is a natural number greater than 1. For example, the touch processing device of item 3 of the patent scope of the application, wherein the processor module is further used for: Respectively make the driving circuit module send a driving signal from the N-1th and N+1th horizontal electrodes, and make the sensing circuit module sense the driving signal from the mutual capacitance of a plurality of vertical electrodes to obtain a first N-1 sensing value array and an N+1th sensing value array; and According to the N-1th sensing value array, the Nth sensing value array, the N+1th sensing value array and the positions of the N-1th to the N+1th horizontal electrodes, Calculate the location of the touch event. A touch processing method for reducing noise when updating pixels, comprising: performing first sensing on multiple horizontal electrodes on a touch screen to obtain multiple first sensing values; After an interval time, perform second sensing on the plurality of horizontal electrodes to obtain a plurality of second sensing values; After the interval time, perform a third sensing on the plurality of horizontal electrodes to obtain a plurality of third sensing values; combining the plurality of first sensing values corresponding to the plurality of horizontal electrodes, the plurality of second sensing values and the plurality of A plurality of third sensing values are respectively added to a sum of a plurality of sensing values; According to the sum of the plurality of sensing values, it is determined that there is an external conductive object close to the touch screen near two adjacent Nth and N+1th lateral electrodes among the plurality of lateral electrodes; and sending driving signals from the Nth and the N+1th horizontal electrodes respectively, and sensing the driving signals from the mutual capacitance of the multiple vertical electrodes of the touch screen to obtain an Nth sensing value array and an Nth sensing value array and an Nth +1 array of sense values; and Calculate the position of a touch event according to the Nth sensing value array, the N+1th sensing value array, the position of the Nth horizontal electrode and the position of the N+1th horizontal electrode, Wherein, the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, the multiple vertical electrodes are perpendicular to the horizontal axis of the pixel of the touch screen, and the multiple vertical electrodes and the multiple horizontal electrodes intersect each other stacked to form multiple overlapping regions, and N is a natural number greater than 1. For example, the touch processing method of item 5 of the scope of patent application further includes: sending driving signals from the N-1th and N+2th horizontal electrodes respectively, and sensing the driving signals from the mutual capacitance of the plurality of vertical electrodes to respectively obtain an N-1th sensing value array and an N+th 2 arrays of sensed values; and According to the N-1th sensing value array, the Nth sensing value array, the N+1th sensing value array, the N+2th sensing value array and the N-1th to The position of the N+2th horizontal electrode is used to calculate the position of the touch event. A touch processing device for reducing interference when updating pixels, comprising: A driving circuit module; a sensing circuit module; and A processor module connected to the driving circuit module and the sensing circuit module is used to execute instructions in the non-volatile memory to realize the following steps: making the sensing circuit module perform first sensing on a plurality of horizontal electrodes on a touch screen to obtain a plurality of first sensing values; After an interval time, make the sensing circuit module perform second sensing on the plurality of horizontal electrodes to obtain a plurality of second sensing values; After the interval time, make the sensing circuit module sense the plurality of horizontal electrodes for the third time to obtain a plurality of third sensing values; summing up the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values corresponding to the plurality of horizontal electrodes to form a plurality of sums of sensing values; According to the sum of the plurality of sensing values, it is determined that there is an external conductive object close to the touch screen near two adjacent Nth and N+1th lateral electrodes among the plurality of lateral electrodes; and Respectively make the driving circuit module send a driving signal from the Nth and the N+1th horizontal electrodes, and make the sensing circuit module sense the driving signal from the mutual capacitance of the plurality of vertical electrodes of the touch screen to obtain an Nth sensing value array and an N+1th sensing value array; and Calculate the position of a touch event according to the Nth sensing value array, the N+1th sensing value array, the position of the Nth horizontal electrode and the position of the N+1th horizontal electrode, Wherein, the multiple horizontal electrodes are parallel to the horizontal axis of the pixel of the touch screen, the multiple vertical electrodes are perpendicular to the horizontal axis of the pixel of the touch screen, and the multiple vertical electrodes and the multiple horizontal electrodes intersect each other stacked to form multiple overlapping regions, and N is a natural number greater than 1. For example, the touch processing device of item 7 of the patent scope of the application, wherein the processor module is further used for: Respectively make the driving circuit module send driving signals from the N-1th and N+2th horizontal electrodes, and make the sensing circuit module sense the driving signals from the mutual capacitance of the plurality of vertical electrodes to obtain a An N-1th sensing value array and an N+2th sensing value array; and According to the N-1th sensing value array, the Nth sensing value array, the N+1th sensing value array, the N+2th sensing value array and the N-1th to The position of the N+2th horizontal electrode is used to calculate the position of the touch event. A touch system for reducing distraction when updating pixels, comprising: Such as the touch processing device of one of items 3, 4, 7 and 8 of the scope of patent application; and A touch screen connected to the touch processing device.

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