TWI619063B - Touch sensitive processing method, apparatus and electronic system for reducing interference from pixel update - Google Patents

Abstract

The present invention provides a touch processing method for reducing interference during pixel update, including: performing sensing three times on a plurality of sensing electrodes on a touch screen at intervals of time to obtain a plurality of first senses And measuring the plurality of second sensing values and the plurality of third sensing values; adding the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values to And summing the plurality of sensing values; determining, according to the sum of the plurality of sensing values, an external conductive object adjacent to the touch screen in the vicinity of the Nth sensing electrodes; and determining the plurality of first senses according to the plurality of first sensing electrodes Determining, by the one of the plurality of second sensing values and the plurality of third sensing values, a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes The horizontal axis of the pixel with the touch screen is parallel to each other.

Description

Touch processing method, device and electronic system for reducing interference during pixel update

The invention relates to a touch screen, in particular to reducing the interference of the touch screen on the touch processing when the pixel is updated.

The touch screen is the main input and output device of modern consumer electronic systems. A typical touch screen is a circuit in which a touch panel is placed above the screen. There are also touch screens in the form of on-cells, or touch screens in the form of in-cells, which may be applicable to the scope of the present application. For example, the content of the applicant's 14/081,018 patent application filed on November 15, 2013, to the U.S. Patent and Trademark Office, may be incorporated herein by reference.

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

In general, each pixel of a modern liquid crystal screen has a corresponding pixel electrode for twisting the polarity of the liquid crystal, thereby changing the transmittance of the liquid crystal of the pixel. According to this, it is possible to control the amount of light transmitted by the respective light-emitting diodes under the liquid crystal, and further control the color of each pixel. In general, the screen controller uses a square wave for Pulse Width Modulation (PWM). The pulse width modulation is used to control the transmittance of the liquid crystal of the pixel. As mentioned in U.S. Patent No. 8,421,828, the degree of polarization of the liquid crystal layer is related to the Root-Mean-Square of the voltage applied to the liquid crystal layer. In the visual persistence period of the human eye, the signal of the fixed voltage can be modulated by the pulse width, and applied to the liquid crystal layer of the pixel, thereby controlling the degree of polarization of the liquid crystal of the pixel, that is, controlling the transmittance of the liquid crystal of the pixel.

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

For example, the vertical blank of the 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 at about 15.4us, which is 1/(60*1080) seconds.

As shown in FIG. 1 , a general touch electrode is also distributed along the horizontal axis and the vertical axis of the touch screen 110. It is assumed that a plurality of parallel touch electrodes extending along the horizontal axis are referred to as a first electrode. 121. A plurality of parallel touch electrodes extending along the longitudinal axis are referred to as second electrodes 122. The first electrode and the second electrode 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 limitation of the touch processing device, too many touch electrodes cannot be accessed, so the number of the first electrode and the second electrode is usually less than the resolution of the screen. For example, a touch screen of about 50 inches has a horizontal axis length of about 1130 mm and a longitudinal axis length of about 670 mm. If the spacing between the electrodes is set to 8 mm, there are about 83 first electrodes and 141 second electrodes. When the size 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 of the first electrodes covers about 12 horizontal axes of pixels.

As shown in FIG. 2, it is a partial enlarged view of the touch screen. The upper interconnected diamond circuits are a horizontal first electrode 121 and a longitudinal second electrode 122, respectively. The lower layer contains a pixel array composed of individual pixels 210, and since there are many pixels, they are not all shown. When the screen is updated, it is updated in units of the pixel horizontal axis 220. It can be seen that in FIG. 2, each of the first electrodes 121 covers six pixel horizontal axes 220. 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 electrode.

Generally, the touch processing device 130 and the screen controller connected to the same touch screen 110 operate independently of each other. The touch processing device 130 generally does not know the display setting values of the touch screen 110, such as the resolution and the update rate, and naturally does not know the horizontal axis of the pixel on which the screen controller updates the touch screen 110. The touch processing device 130 may perform mutual capacitance sensing, that is, the first electrode 121 parallel to the horizontal axis of the pixel emits a plurality of square waves as a driving signal, and the sensing of the driving signals by all the second electrodes 122 is received. signal. If the touch processing device 130 happens to be at the same time When the horizontal axis of the pixel covered by the first electrode 121 is updated, since the driving signal of the touch is a square wave, and the pixel update is also modulated by the pulse width of the square wave, the driving signal will seriously interfere with the pixel liquid crystal. The degree of polarization causes the user of the touch screen to see an abnormally bright situation near the first electrode 121. However, since the detection cycle of the touch controller and the update period of the screen are fast, the time for the intersection of the two is less than the period of the human visual persistence, so the probability that the user is aware of the abnormal darkness when the mutual capacitance is sensed is not high.

During the mutual capacitance detection, the touch processing device 130 rotates the touch driving electrodes to generate driving signals, and causes the touch sensing electrodes to 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 smaller number of first electrodes as the touch sensing electrodes, and a larger number of second electrodes as Touch drive electrode.

When the second electrode is used as the touch driving electrode, the full-screen mutual capacitance detection is performed, and the touch processing device 130 rotates the second electrode to emit an alternating pulse signal, which is a square wave or a sine wave. When the frequency of the AC pulse signal is 200 KHz, and each pulse emits 30 cycles, the time for each second electrode to emit a signal is about 0.15 ms or 150 us, that is, 30/200,000 seconds. Since there are 141 second electrodes, and the replacement of the second electrode requires processing time, 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 update time of each pixel horizontal axis. . When the frequency of the AC pulse signal is 100 kHz and each pulse is issued for 30 cycles, the time for each second electrode to emit a signal is about 0.33 ms, that is, 30/100,000 seconds. Since there are 141 second electrodes, and the replacement of the second electrode requires processing time, it takes 0.04653s or 46.53ms or 46530us to perform a full-screen mutual capacitance detection, which is much longer than the update time of each pixel horizontal axis of 15.4ms.

When self-capacitance detection is performed by using the first electrode and the second electrode, the touch processing device 130 respectively causes all the first electrodes and all the second electrodes to emit driving signals, and all the first electrodes and all the The second electrode measures the signal. If the AC pulse signal of 30 cycles of 200KHz is also used, all the first electrodes consume 0.15ms, and all the second electrodes consume 0.15ms, which is 0.3ms or 300us, which is much longer than each. The pixel horizontal axis update time is 15.4us.

Another detection mode is to perform self-capacitance detection first, and then perform mutual capacitance detection according to the result of self-capacitance detection. For example, the touch processor first uses all of the first electrodes for self-capacitance detection, and the elapsed time is 0.15 ms, and it is found that N first electrodes are touched. Then, the touch processor drives the N first electrodes in turn, and finds the touch area according to the sensing results of all the second electrodes. Under this condition, the elapsed time is approximately (N + 1) * 0.15 ms. Even if the eleven fingers touch at the same time, let N be 11 and the elapsed time is about 1.8ms, which is much longer than the update time of each pixel on the horizontal axis of 15.4us.

In addition to detecting external conductive objects, the touch processor can be similar to the self-capacitance method, and all the first electrodes and the second electrodes detect the active stylus that emits electromagnetic signals. Assuming that the electrical signal emitted by the active stylus is the same as the aforementioned driving signal, the detection time required for all the touch electrodes is about 0.15 ms, which is longer than the update time of each pixel on the horizontal axis of 15.4 us.

When a horizontal axis of a pixel is updated, new pixel data is sent to the corresponding pixel electrode in the horizontal axis. Therefore, the liquid crystal screen near the horizontal axis of the strip will emit greater electromagnetic interference than the liquid crystal screen in other places, and the electromagnetic interference phenomenon will affect the touch electrode. In the above example, since one first electrode covers about 12 horizontal axes of pixels, most of the horizontal axis of the pixel will only cause severe interference to a single first electrode, such as the pixel horizontal axis 222 of FIG. less The horizontal axis of the pixel is located between the two first electrodes, such as the pixel horizontal axis 221 of FIG. 2, which causes interference between the two first electrodes without causing severe interference to the farther first electrode.

Since the touch processing device responsible for touch sensing is not connected to the display processor responsible for display, the touch processing device has no way to avoid covering the horizontal axis of the pixel when the horizontal axis of a certain pixel is updated. The first electrode performs touch sensing to avoid receiving electromagnetic interference generated when the pixel is updated.

Therefore, one of the purposes of the present application is to provide a touch processing method for a touch processing device, which utilizes sensing results of a plurality of lateral electrodes performed at appropriate intervals to determine which sensing result of the lateral electrodes is indeed touched. Control the correlation, or determine which lateral electrode sensing result is independent of the touch, and exclude the sensing result from the touch calculation, so that the touch calculation can avoid or at least reduce the electromagnetic interference affected by the pixel update. . Another object of the present application is to provide a touch processing method for a touch processing device for finding the appropriate interval time.

In an embodiment, the present application provides a touch processing method for reducing interference when a pixel is updated, including: performing a first sensing on a plurality of sensing electrodes on a touch screen to obtain a plurality of a sensing value; after an interval time, performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing values; after the interval time, performing the plurality of sensing electrodes Three times of sensing to obtain a plurality of third sensing values; the plurality of first sensing values corresponding to the plurality of sensing electrodes, the plurality of second sensing values, and the plurality of third sensing The values are respectively added to the sum of the plurality of sensing values; determining, according to the sum of the plurality of sensing values, an external conductive object adjacent to the touch screen in the vicinity of the Nth sensing electrodes of the plurality of sensing electrodes; Multiple first sensing Determining, by the one of the plurality of second sensing values and the plurality of third sensing values, a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes are The horizontal axes of the pixels of the touch screen are parallel to each other.

In an example, the step of determining the location further includes: ignoring the first sensed value corresponding to the N-1th sense electrode among the plurality of first sensed values; and according to the plurality of first senses The measured value is used to determine the position of the external conductive object relative to the plurality of sensing electrodes.

In an example, the step of determining the location further includes: ignoring the third sensing value corresponding to the (N+1)th sensing electrode among the plurality of third sensing values; and according to the plurality of third senses The measured value is used to determine the position of the external conductive object relative to the plurality of sensing electrodes.

In an example, the step of determining the location further includes: finding a first one of the first sensing value, the second sensing value, and the third sensing value corresponding to the Nth sensing electrode; Finding 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; ignoring the plurality of the corresponding ones Sensing corresponding to the (N-1)th sensing electrode and the (N+1th)th sensing electrode among one of the sensing values, the plurality of second sensing values, or the plurality of third sensing values And determining, 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 minimum one, the external conductive object relative to the The position of the plurality of sensing electrodes.

In an example, the step of determining the location further includes: ignoring the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values corresponding to the minimum one One of the sensing values corresponding to the N-2th sensing electrode and the N+2th sensing electrode.

In one embodiment, the present application provides a touch processing device for reducing interference when a pixel is updated, including a sensing circuit and a processor connected to the sensing circuit. The feeling The measuring circuit is configured to: perform a first sensing on the plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; and after the interval time, perform a second sensing on the plurality of sensing electrodes Sub-sensing to obtain a plurality of second sensing values; and after the interval time, performing a third sensing on the plurality of sensing electrodes to obtain a plurality of third sensing values. The processor is configured to add 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 to each of the plurality of sensing values And summing, according to the sum of the plurality of sensing values, an external conductive object in the vicinity of the Nth sensing electrodes of the plurality of sensing electrodes is adjacent to the touch screen; and the plurality of first sensing values, the plurality of The second sensing value and one of the plurality of third sensing values determine a position of the external conductive object relative to the plurality of sensing electrodes. The plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

In an example, the processor is further configured to: ignore the first sensing value corresponding to the N-1th sensing electrodes among the plurality of first sensing values; and according to the plurality of first sensing The value is used to determine the position of the outer conductive object relative to the plurality of sensing electrodes.

In another example, the processor is further configured to: ignore the third sensing value corresponding to the (N+1)th sensing electrode among the plurality of third sensing values; and according to the plurality of third senses The measured value is used to determine the position of the external conductive object relative to the plurality of sensing electrodes.

In a further example, the processor is further configured to: find a first one of the first sensing value, the second sensing value, and the third sensing value corresponding to the Nth sensing electrode; Finding 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; ignoring the plurality of the corresponding ones Sensing corresponding to the (N-1)th sensing electrode and the (N+1th)th sensing electrode among one of the sensing values, the plurality of second sensing values, or the plurality of third sensing values a value; and the plurality of first sensings corresponding to the minimum one The value, the plurality of second sensed values, or one of the plurality of third sensed values is used to determine the position of the outer conductive object relative to the plurality of sense electrodes.

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 one Corresponding to the sensing value of the N-2th sensing electrode and the N+2th sensing electrode.

In an embodiment, the present application provides an electronic system for reducing interference when a pixel is updated, including: a touch screen and a touch processing device connected to the touch screen. The touch processing device includes a sensing circuit and a processor coupled to the sensing circuit. The sensing circuit is configured to: perform a first sensing on the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes The second sensing is performed to obtain a plurality of second sensing values; and after the interval time, the plurality of sensing electrodes are subjected to a third sensing to obtain a plurality of third sensing values. The processor is configured to add 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 to each of the plurality of sensing values And summing, according to the sum of the plurality of sensing values, an external conductive object in the vicinity of the Nth sensing electrodes of the plurality of sensing electrodes is adjacent to the touch screen; and the plurality of first sensing values, the plurality of The second sensing value and one of the plurality of third sensing values determine a position of the external conductive object relative to the plurality of sensing electrodes. The plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

In an embodiment, the present application provides a touch processing method for reducing interference when a pixel is updated, including: performing a first sensing on a plurality of sensing electrodes on a touch screen to obtain a plurality of a sensing value; after an interval time, performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing values; after the interval time, the plurality of sensing electrodes Performing a third sensing to obtain a plurality of third sensing values; the plurality of first sensing values corresponding to the plurality of sensing electrodes, the plurality of second sensing values, and the plurality of third The sensing values are respectively added to the sum of the plurality of sensing values; determining, according to the sum of the plurality of sensing values, that an external conductive object is adjacent to the touch in the vicinity of at least two adjacent sensing electrodes of the plurality of sensing electrodes And determining, according to the plurality of first sensing values, the plurality of second sensing values and the plurality of third sensing values, one of the external conductive objects relative to the plurality of sensing electrodes a position, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

In an example, the step of determining the location further includes: the first sensing value, the second sensing value, and the third sensing corresponding to the sensing electrode according to one of the at least two sensing electrodes The largest of the measured values, determining whether the largest one corresponds to the first sensing, the second sensing, or the third sensing; ignoring the first sensing corresponding to the largest one, a sensing value corresponding to the neighboring sensing electrode of the second sensing or the third sensing; and the first sensing, the second time corresponding to the largest one The sensing or the third sensing is performed to determine the position of the external conductive object relative to the plurality of sensing electrodes.

In another example, the step of determining the location further includes: according to each of the at least two sensing electrodes, the first sensing value, the second sensing value, and the third sensing value Having the largest difference from the other two, ignoring the plurality of first sensed values, the plurality of second sensed values, or the plurality of third sensed values corresponding to the largest one; And sensing one of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values, ignoring the sensing values of the sensing electrodes of the at least two sensing electrodes; And determining, 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, the external conductive object relative to the plurality of sensing electrodes The location.

In a further example, the step of determining the location further includes: finding, according to each of the at least two sensing electrodes, the first sensing value, the second sensing value, and the third sensing value. The difference between the other two is the largest, and the average of the other two is measured; and the external conductive is determined according to the average sensed value corresponding to each of the at least two sensing electrodes The position of the object relative to the plurality of sensing electrodes.

In an embodiment, the present application provides a touch processing device for reducing interference when a pixel is updated, including: a sensing circuit and a processor connected to the sensing circuit. The sensing circuit is configured to: perform a first sensing on the plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes The second sensing is performed to obtain a plurality of second sensing values; and after the interval time, the plurality of sensing electrodes are subjected to a third sensing to obtain a plurality of third sensing values. The processor is configured to add 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 to each of the plurality of sensing values And summing, according to the sum of the plurality of sensing values, determining that an external conductive object is adjacent to the touch screen in the vicinity of at least two adjacent sensing electrodes of the plurality of sensing electrodes; and according to the plurality of first sensing values Determining, by the one of the plurality of second sensing values and the plurality of third sensing values, a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes and the The pixel horizontal axes of the touch screen are parallel to each other.

In an example, the processor is further configured to: the first sensing value, the second sensing value, and the third sensing value corresponding to the sensing electrodes of the at least two sensing electrodes The largest of the ones, determining whether the largest one corresponds to the first sensing, the second sensing, or the third sensing; ignoring the first sensing corresponding to the largest one, the first a sensing value corresponding to the neighboring sensing electrode in one of the second sensing or the third sensing; and according to the sensing value The one of the first sensing, the second sensing, or the third sensing corresponding to the largest one determines 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 The largest difference between the other two, ignoring the plurality of first sensing values, the plurality of second sensing values or the plurality of third sensing values corresponding to the largest one; according to the plurality of not ignored One of the first sensing value, the plurality of second sensing values, or the plurality of third sensing values, ignoring the sensing value of the sensing electrode of the at least two sensing electrodes; and Determining, by 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, determining the external conductive object relative to the plurality of sensing electrodes position.

In a further example, the processor is further configured to: find, according to each of the at least two sensing electrodes, the first sensing value, the second sensing value, and the third sensing value. The difference between the other two is the largest, and the average of the other two sensed values; and the average sensed value corresponding to each of the at least two sensing electrodes is determined, and the external conductive object is determined to be relatively The position of the plurality of sensing electrodes.

In an embodiment, the present application provides an electronic system for reducing interference when a pixel is updated, including: 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 configured to: perform a first sensing on the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes The second sensing is performed to obtain a plurality of second sensing values; and after the interval time, the plurality of sensing electrodes are subjected to a third sensing to obtain a plurality of third sensing values. The processor is configured to: correspond to the The plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values of the plurality of sensing electrodes are respectively summed into a sum of the plurality of sensing values; according to the plurality of sensing values Summarizing, determining that an external conductive object is adjacent to the touch screen in the vicinity of at least two adjacent sensing electrodes of the plurality of sensing electrodes; and the plurality of second sensing values according to the plurality of first sensing values And determining, by one of the plurality of third sensing values, a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes and the horizontal axis of the touch screen of the touch screen are parallel to each other .

In an embodiment, the present application provides a touch processing method for obtaining an interval time for performing another touch processing method for reducing interference during pixel update by using the interval time, including: setting the interval time; Determining that a touch screen does not have any adjacent external conductive objects; performing three sensing on the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values, a plurality of second sensing values, and a plurality of a three-sensing value, each time interval is separated by the interval; determining whether the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values are only one maximum a value; when the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values have only a single maximum value, determining whether the three maximum values correspond to the adjacent three Sensing the electrode; and storing the interval when the three maximum values correspond to the adjacent three sensing electrodes, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

In one embodiment, the present application provides a touch processing device for obtaining an interval time for performing a touch processing method for reducing interference during pixel update, including: a sensing circuit and a connection. To a processor of the sensing circuit. The sensing circuit is configured to: perform a first sensing on the plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes The second sensing is performed to obtain a plurality of second sensing values; and after the interval time, the plurality of sensing electrodes are subjected to the third time Sensing to obtain a plurality of third sensed values. The processor is configured to: determine whether the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values have only a single maximum value; when the plurality of first sensing When the value, the plurality of second sensing values and the plurality of third sensing values have only a single maximum value, determining whether the three maximum values correspond to the adjacent three sensing electrodes; if the three maximum values The interval time is stored corresponding to the adjacent three sensing electrodes, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

In an embodiment, the present application provides an electronic system for obtaining an interval time for performing a touch processing method for reducing interference during pixel update, including: a touch screen and connecting to the A touch processing device for a touch screen. The touch processing device includes: a sensing circuit; and a processor connected to the sensing circuit. The sensing circuit is configured to: perform a first sensing on the plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes The second sensing is performed to obtain a plurality of second sensing values; and after the interval time, the plurality of sensing electrodes are subjected to a third sensing to obtain a plurality of third sensing values. The processor is configured to: determine whether the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values have only a single maximum value; when the plurality of first sensing When the value, the plurality of second sensing values and the plurality of third sensing values have only a single maximum value, determining whether the three maximum values correspond to the adjacent three sensing electrodes; if the three maximum values The interval time is stored corresponding to the adjacent three sensing electrodes, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

In summary, according to the touch processing method, apparatus, and electronic system provided by the above embodiments, interference during pixel update can be reduced. In addition, the touch processing method, device, and electronic system provided by the above embodiments are used to obtain an interval time to utilize the interval. A touch processing method is performed to reduce interference when the pixels are updated.

100‧‧‧Electronic system

110‧‧‧ touch screen

121‧‧‧First electrode

122‧‧‧second electrode

130‧‧‧Touch processing device

210‧‧ ‧ pixels

220‧‧‧pixel horizontal axis

221‧‧‧pixel horizontal axis

222‧‧‧pixel horizontal axis

300‧‧‧Touch processing method

310~369‧‧‧Steps

400‧‧‧Touch processing method

460~468‧‧‧Steps

500‧‧‧Touch processing method

510~570‧‧‧Steps

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

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

FIG. 3A is a schematic flow chart of a touch processing method 300 according to an embodiment of the present application.

3B-3D are schematic diagrams of a process of step 360, respectively.

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

4B~4D are schematic diagrams of a process of step 460, respectively.

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

The invention will be described in detail below with some embodiments. However, the invention may be applied to other embodiments in addition to the disclosed embodiments. The scope of the present invention is not limited by the embodiments, which are subject to the scope of the claims. To provide a clearer description and to enable those skilled in the art to understand the invention, the various parts of the drawings are not drawn according to their relative dimensions, and the ratio of certain dimensions to other related dimensions will be highlighted. The exaggerated and irrelevant details are not completely drawn to illustrate the simplicity of the illustration.

Please refer to Table 1, which is a sensing result of the touch sensing method according to an embodiment of the invention. In Table 1, adjacent lateral electrodes are subjected to three sensing, and each sensing time is separated by an appropriate time. The sensing of the lateral electrodes in Table 1 may be the mutual capacitance sensing described above, or the sensing of the self-capacitance described above, or the sensing of the self-capacitance by performing mutual capacitance first, or may be directed to active Stylus detection. The invention is not limited to what sense As long as it is a sensing of the touch electrode that is updated parallel to the horizontal axis of the pixel.

In Table 1, in the first sensing, the N-1th lateral electrode is disturbed by the update of the horizontal axis of the pixel, so the N-1th lateral electrode has a sensed value, or the sensed value is greater than a certain Threshold value. In addition, the Nth lateral electrode also has a touch signal caused by the real touch. If the touch calculation is performed on the first sensing result alone, the interference of the N-1th lateral electrode will be counted.

When the second sensing is performed after a certain interval time, since the horizontal axis of the pixel updated by the screen has moved down with time, the Nth horizontal electrode is disturbed. At the same time, the touch signal is still sensed by the Nth lateral electrode, so neither the N-1th nor the N+1th lateral electrodes sense the signal.

Then, when the third sensing is performed after a certain interval time, since the horizontal axis of the pixel updated by the screen has moved down with time, it is replaced by the N+1th horizontal electrode being interfered. At the same time, the touch signal is still sensed by the Nth lateral electrode, so the Nth and N+1th lateral electrodes have sensed values.

Touch processing device for performing the touch processing method after performing three sensing According to the results of Table 1, it can be found that the phenomenon of updating the interference affects the N-1th, Nth, and N+1th lateral electrodes with time. However, the Nth lateral electrode has a sensed value in three senses, so it can be judged that the sensed value of the Nth lateral electrode in the first and third senses is effective and can be used for Touch calculation.

In another embodiment, the touch processing device that performs the touch processing method can add the three sensed values together. Since the sensing value of the Nth lateral electrode is the largest, the Nth horizontal electrode can be considered. The sensed value is the true touch signal.

Since the second sensed value is the largest among the three sensed values of the Nth lateral electrode, the first or third sensed result can be taken for calculation. Alternatively, the smallest sensing result of the three sensing values may be taken for calculation. In the calculation, the sensed value of the adjacent lateral electrodes can be regarded as interference and ignored. For example, when the first or third sensing results are calculated, the sensing results of the N-1th and N+1th lateral electrodes can be ignored.

In the embodiment of Table 1, the interval of each sensing may be a value stored in advance. For example, in a consumer electronic product, the user cannot change the resolution of the touch screen, so the touch processor can perform multiple sensing according to the predetermined storage interval.

In another embodiment, the touch processing device or the driver thereof can obtain the resolution, the update rate, and the size of the touch screen from the operating system of the electronic system, thereby calculating the time for updating the horizontal axis of the pixel. And according to the number of horizontal axes of pixels covered by each lateral electrode, the interval time is set to be greater than or equal to the product of the two, that is, the interval time between the two lateral electrodes sensing, the different horizontal electrodes are updated by the horizontal axis of the pixel The biggest interference. For example, in the above example, when each first electrode covers 12 horizontal axes of pixels and the horizontal axis update time of each pixel is 15.4 us, the interval between two scans can be greater than 184.8 us.

In some embodiments, if the touch processing device cannot obtain the resolution, update rate, and size of the touch screen, the interval time can be dynamically adjusted. For example, when the touch processor does not detect any objects, the interval can be corrected until the result of Table 2 appears.

Since the sensed values of the three lateral electrodes are substantially equal after the summation of the three senses, and the sensed values are sequentially moved, the touch processor can understand that the sensing interval time set at this time is appropriate. . This interval can be used later as a detection parameter.

In the embodiment of Table 1, the sensing must be performed three times, and the touch processor can perform the touch calculation according to the correct result, and then return the correct touch point to the operating system. However, in another embodiment, the touch calculation and the report point described above may be a pipeline. For example, the first report is based on the first to third senses, the second report is based on the second to fourth senses, and the third report is based on the third to fifth senses. Test, and so on. Therefore, only the first time the report is slow, and the rest of the time is corresponding to each sense.

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

In the embodiment of Table 3, when the first sensing is performed, the horizontal axis of the pixel between the N-1th and Nth lateral electrodes is just updated, so both lateral electrodes sense partial updates. interference. When the second sensing occurs, the horizontal axis of the pixel between the Nth and N+1th lateral electrodes is updated, so that both of the lateral electrodes sense partial update interference. When the last sensing, the horizontal axis of the pixel between the N+1th and N+2th lateral electrodes is updated, so the two lateral electrodes sense partial update interference.

In the embodiment of Table 3, when the first sensing is performed, the horizontal axis of the pixel between the N-1th and Nth lateral electrodes is just updated, so both lateral electrodes sense partial updates. interference. When the second sensing occurs, the horizontal axis of the pixel between the Nth and N+1th lateral electrodes is updated, so that both of the lateral electrodes sense partial update interference. When the last time, A pixel horizontal axis update between the N+1th and N+2th lateral electrodes is encountered, so the two lateral electrodes sense partial update interference.

When the sensed values of the three sensed results are added, the sum of the sensed values of the Nth lateral electrodes is still higher than the other three lateral electrodes, so the touch processing device treats the Nth lateral electrodes as To the lateral electrode of the touch signal.

Similarly, since the third sensed value is the smallest among the three sensed values of the Nth lateral electrode, the smallest sensed result of the three sensed values may be taken, or two closer sensed values may be obtained. can be ignored. In the calculation, the sensed values of the two adjacent lateral electrodes can be regarded as interference and neglected. For example, when the third sensing result is used for calculation, the sensing results of the N-2, N-1, N+1, and N+2 lateral electrodes can be ignored.

Please refer to Tables 4 and 5, which are sensing results according to another embodiment of the present invention. Since the size of the external conductive object may be large, it is also possible to span more than two lateral electrodes, so the results of Table 4 or Table 5 may occur.

In the embodiment of Table 4, the N-1th and Nth lateral electrodes sense the touch signal. Similarly, in the embodiment of Table 5, the Nth and N+1th lateral electrodes sense the touch signal.

The touch processing device can determine that two adjacent lateral electrodes receive the touch signal according to the summation result of the three sensings. In the embodiment of Table 4, the sum of the sensed values of the N-1th and Nth lateral electrodes is greater than the sum of the sensed values of the N+1th lateral electrodes, so the N-1th and Nthth clauses are judged. The lateral electrode receives the touch signal, and the N+1th lateral electrode does not receive the touch signal. In the embodiment of Table 5, the sum of the sensed values of the Nth and N+1th lateral electrodes is greater than the sum of the sensed values of the N-1th lateral electrodes, so the Nth and N+1th pieces are judged. The lateral electrode receives the touch signal, and the N-1th lateral electrode does not receive the touch signal.

In an embodiment, the touch may be calculated by taking the sensing result that the lateral electrode that has not received the touch signal is disturbed. For example, in the embodiment of Table 4, the N+1th lateral electrode does not receive the touch signal, and it is interfered with the sensed value during the third sensing, so the third sensing result is used. The touch is calculated, but the sensed value of the N+1th lateral electrode is omitted. For example, in the embodiment of Table 5, the N-1th lateral electrode does not receive the touch signal, and it is interfered with the sensed value during the first sensing, so the first sensing result is used. To calculate the touch, but the sensed value of the N-1th lateral electrode is omitted.

In another embodiment, the sensing value similar to the lateral electrodes of the received touch signal may be used for calculation. For example, in the embodiment of Table 4, the second two sensing results of the N-1th lateral electrode are similar, and the first and third sensing results of the Nth lateral electrode are similar, so the third time is adopted. Sensing results to calculate. In the embodiment of Table 5, the first and third sensing results of the Nth lateral electrode are similar, and the first and second sensing results of the N+1th lateral electrode are similar, so the first is adopted. The second sensing result is calculated.

In a further embodiment, the average of the sensed values of the lateral electrodes receiving the touch signal can be calculated. For example, in the embodiment of Table 4, the second two sensing results of the N-1th lateral electrode are similar, and the first and third sensing results of the Nth lateral electrode are similar, so the N-th is adopted. The average of the last two sensing results of one lateral electrode, and the first and third sensing results of the Nth lateral electrode are calculated. In the embodiment of Table 5, the first and third sensing results of the Nth lateral electrode are similar, and the first and second sensing results of the N+1th lateral electrode are similar, so the Nth is adopted. The average of the first and third sensing results of the strip lateral electrodes, and the average of the first and second sensing results of the N+1th lateral electrodes are calculated.

It will be understood by those skilled in the art that although only three sensings are used as an example in the embodiments of Tables 1 to 5, the scope of the present invention is not limited to three sensing, and can be extended to three or more sensing. Example. Those of ordinary skill in the art should be able to promote themselves in accordance with the teachings of the present invention.

In summary, the present application provides a touch control method for a touch processor, and determines, by using a plurality of lateral electrodes sensing results at appropriate intervals, which sensing result of the lateral electrode is actually related to the touch, or Determining which sensing result of the lateral electrode is independent of the touch, and excluding the sensing result from the touch calculation, so that the touch calculation can be avoided or at least reduced Affected by electromagnetic interference that is updated by the horizontal axis of the pixel.

Please refer to FIG. 3A , which is a schematic flowchart of a touch processing method 300 according to an embodiment of the invention, which can be applied to the embodiments of Table 1 and Table 3. The touch processing method 300 includes, but is not limited to, the following steps. Step 310: Perform a first sensing on the plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values. Step 320: After an interval time, perform the first sensing electrodes on the plurality of sensing electrodes. Second sensing, to obtain a plurality of second sensing values; Step 330: After the interval time, performing a third sensing on the plurality of sensing electrodes to obtain a plurality of third sensing values; Adding 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 to a total of the plurality of sensing values; step 350 And determining, according to the sum of the plurality of sensing values, an external conductive object adjacent to the touch screen in the vicinity of the Nth sensing electrodes of the plurality of sensing electrodes; and step 360: according to the plurality of first sensing values, the Determining a position of the external conductive object relative to the plurality of sensing electrodes by one of the plurality of second sensing values and the plurality of third sensing values. The plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

Step 360 can include three different embodiments. Please refer to FIG. 3B , which is a schematic flowchart of the first embodiment of the step 360 of the touch processing method 300 . In the first embodiment, step 361: ignoring the first sensing value corresponding to the N-1th sensing electrodes among the plurality of first sensing values; and step 362: determining the plurality of first senses according to the plurality of first 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. 3C , which is a schematic flowchart of a second embodiment of step 360 of the touch processing method 300 . In the second embodiment, step 363: ignoring the third sensing value corresponding to the (N+1)th sensing electrode among the plurality of third sensing values; and step 364: according to the plurality of third senses Measured to determine the external conductive object relative to the plurality of senses This position of the electrode. Please refer to FIG. 3D , which is a schematic flowchart of a third embodiment of the step 360 of the touch processing method 300 . In the third embodiment, step 365: finding the first sensing value corresponding to the Nth sensing electrode, the smallest of the second sensing value and the third sensing value; Step 366: Finding 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 one; step 367: ignoring the corresponding one of the minimum ones One of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values, corresponding to the (N-1)th sensing electrode and the (N+1)th sensing electrode Sensed value; optional but not necessary to perform step 368: ignoring the plurality of first sensed values, the plurality of second sensed values, or the plurality of third sensed values corresponding to the smallest one One of the sensing values of the Nth and 2nd sensing electrodes corresponding to the N-2th sensing electrode; and 369: the plurality of first sensing values corresponding to the minimum one, the plurality of The second sensed value or one of the plurality of third sensed values is used to determine the position of the outer conductive object relative to the plurality of sense electrodes.

According to an embodiment of the invention, the touch processing method 300 can be performed by the touch processing device 130 of FIG. 1 . The touch processing device 130 can include a sensing circuit for connecting the plurality of sensing electrodes, and is responsible for performing steps 310, 320, and 330. The touch processing device 130 can include a processor for connecting to the sensing circuit, responsible for performing steps 340, 350, and 360, and steps 361-369 of the three embodiments included in step 360. The processor may be an embedded processor or a stand-alone processor that implements the steps described above using software or instructions executed.

In other words, according to the embodiment, the present invention provides a touch processing device for reducing interference when a pixel is updated, comprising a sensing circuit and a processor connected to the sensing circuit. The sensing circuit is configured to: perform a first sensing on the plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes second Sub-sensing to obtain a plurality of second sensing values; and after the interval time, performing a third sensing on the plurality of sensing electrodes to obtain a plurality of third sensing values. The processor is configured to add 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 to each of the plurality of sensing values And summing, according to the sum of the plurality of sensing values, an external conductive object in the vicinity of the Nth sensing electrodes of the plurality of sensing electrodes is adjacent to the touch screen; and the plurality of first sensing values, the plurality of The second sensing value and one of the plurality of third sensing values determine a position of the external conductive object relative to the plurality of sensing electrodes. The plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

In an embodiment, the processor is further configured to: ignore the first sensing value corresponding to the N-1th sensing electrodes among the plurality of first sensing values; and according to the plurality of first senses 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 processor is further configured to: ignore the third sensing value corresponding to the (N+1)th sensing electrode among the plurality of third sensing values; and according to the plurality of third The sensed value is used to determine the position of the outer conductive object relative to the plurality of sensing electrodes. In a further embodiment, the processor is further configured to: find the first sensing value corresponding to the Nth sensing electrode, the smallest of the second sensing value and the third sensing value Finding 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; ignoring the plurality of the corresponding ones Sense of the N-1th sensing electrode and the (N+1th)th sensing electrode among one of the first sensing value, the plurality of second sensing values, or the plurality of third sensing values And determining, 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 minimum, the external conductive object relative to The position of the plurality of sensing electrodes. In a variation, the processor is further configured to: ignore the plurality of first sensing values corresponding to the minimum one, and the plurality of second One of the sensing value or the plurality of third sensing values corresponds to a sensing value of the N-2th sensing electrode and the N+2th sensing electrode.

According to an embodiment of the invention, the present invention provides an electronic system for reducing interference during pixel update, 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 coupled to the sensing circuit. The sensing circuit is configured to: perform a first sensing on the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes The second sensing is performed to obtain a plurality of second sensing values; and after the interval time, the plurality of sensing electrodes are subjected to a third sensing to obtain a plurality of third sensing values. The processor is configured to add 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 to each of the plurality of sensing values And summing, according to the sum of the plurality of sensing values, an external conductive object in the vicinity of the Nth sensing electrodes of the plurality of sensing electrodes is adjacent to the touch screen; and the plurality of first sensing values, the plurality of The second sensing value and one of the plurality of third sensing values determine a position of the external conductive object relative to the plurality of sensing electrodes. The plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

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 of Table 4 and Table 5. The touch processing method 400 includes, but is not limited to, the following steps, wherein steps 310, 320, 330, and 340 are the same as those shown in FIG. 3A, and are not described in detail herein. Step 450: Determine, according to the sum of the plurality of sensing values, that an external conductive object is adjacent to the touch screen in the vicinity of at least two adjacent sensing electrodes of the plurality of sensing electrodes. For example, when there are at least two adjacent sensing values greater than a threshold value, it can be determined that the adjacent sensing value has an external conductive object adjacent to the adjacent at least two sensing electrodes. The touch screen. Or, when there are at least two adjacent sensing values greater than the sensing values of the neighboring edges, that is, when the difference is greater than another threshold, the adjacent sensing values may be determined to correspond to at least two An external conductive object is adjacent to the touch screen in the vicinity of the sensing electrode. Then, step 460 is performed to determine, according to the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values, the external conductive object relative to the plurality of sensing electrodes a position. For example, in the embodiment of Table 4, step 450 can determine that the N-1th and Nth sensing electrodes are the at least two sensing electrodes. In the embodiment of Table 5, step 450 can determine the Nth. The strip and the (N+1)th sensing electrode are the at least two sensing electrodes.

Please refer to FIG. 4B , which is a schematic flowchart of an embodiment of step 460 . Step 461: Determine the largest one of the first sensing value, the second sensing value, and the third sensing value corresponding to one of the at least two sensing electrodes. Corresponding to which of the first sensing, the second sensing, or the third sensing. Step 462: Ignore the sensed value of the neighboring sensing electrode among one of the first sensing, the second sensing, or the third sensing corresponding to the largest one. Step 463: determining, according to the first sensing, the second sensing, or the third sensing corresponding to the largest one, the external conductive object relative to the plurality of sensing electrodes position. For example, in the embodiment of Table 4, the neighboring sensing electrode of step 461 may be the N+1th strip, and the largest of the first sensing value, the second sensing value, and the third sensing value. It is the third sensed value and therefore corresponds to the third sense. In step 462, the sensed value (updated interference value) corresponding to the (N+1)th sensing electrode is ignored in the third sensing, and then in step 462, according to the plurality of third sensing values. And determining the position of the external conductive object relative to the plurality of sensing electrodes. For example, in the embodiment of Table 4, the neighboring sensing electrode of step 461 may be the N-1th, and the first sensing value, the second sensing value, and the third sensing value are The largest is the first sensed value, so it corresponds to the first sense. In step 462, the sensed value corresponding to the (N-1th) sensing electrode (updated interference value) is ignored in the first sensing, and then in step 462, according to the plurality of first sensing values. And determining the position of the external conductive object relative to the plurality of sensing electrodes.

Please refer to FIG. 4C , which is a schematic flowchart of another embodiment of step 460 . Step 464: ignoring the difference between the other of the first sensing value, the second sensing value, and the third sensing value according to the at least two sensing electrodes. 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 465: Ignore one of the at least two sensing electrodes 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. Sensing value of the adjacent sensing electrode. Step 466: Determine, 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, the external conductive object relative to the plurality of senses This position of the electrode. For example, in step 464 of the embodiment of Table 4, the difference between the first sensing value of the N-1th sensing electrode and the other two is the largest, so the plurality of first sensing values are ignored, the Nth sense The second sensed value of the electrode is the largest difference from the other two, so the plurality of second sensed values are ignored. In step 465, among the plurality of third sensing values that are not to be ignored, the sensing values corresponding to the neighboring sensing electrodes (N+1) are ignored. In step 466, 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 464 of the embodiment of 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 sense The third sensing value of the measuring electrode is the largest difference from the other two, so the plurality of third sensing values are ignored. In step 465, among the plurality of first sensing values that are not to be ignored, the sensing values corresponding to the neighboring sensing electrodes (the N-1th) are ignored. In step 466, according to the multi The first sensing value determines 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 another embodiment of step 460 . Step 467: Find, according to each of the at least two sensing electrodes, a difference between the first sensing value, the second sensing value, and the third sensing value, and the other two, And take the average of the other two sensed values. Step 468: Determine the position of the external conductive object relative to the plurality of sensing electrodes according to an average sensing value corresponding to each sensing electrode of the at least two sensing electrodes. For example, in the embodiment of Table 4, the second two sensing results of the N-1th lateral electrode are similar, and the first and third sensing results of the Nth lateral electrode are similar, so in step 467 Using the average of the last two sensing results of the N-1th lateral electrode and the first and third sensing results of the Nth lateral electrode. In the embodiment of Table 5, the first and third sensing results of the Nth lateral electrode are similar, and the first and second sensing results of the N+1th lateral electrode are similar, so in step 467 The average of the first and third sensing results of the Nth lateral electrode and the average of the first and second sensing results of the N+1th lateral electrode are calculated.

In an embodiment, the present application provides a touch processing device for reducing interference when a pixel is updated, including: a sensing circuit and a processor connected to the sensing circuit. The sensing circuit is configured to: perform a first sensing on the plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes The second sensing is performed to obtain a plurality of second sensing values; and after the interval time, the plurality of sensing electrodes are subjected to a third sensing to obtain a plurality of third sensing values. The processor is configured to add 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 to each of the plurality of sensing values Sum; determining the plurality of sensing powers based on the sum of the plurality of sensing values An external conductive object is adjacent to the touch screen in the vicinity of at least two adjacent sensing electrodes of the pole; and the plurality of second sensing values and the plurality of third sensing according to the plurality of first sensing values One of the values determines a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

In an example, the processor is further configured to: the first sensing value, the second sensing value, and the third sensing value corresponding to the sensing electrodes of the at least two sensing electrodes The largest of the ones, determining whether the largest one corresponds to the first sensing, the second sensing, or the third sensing; ignoring the first sensing corresponding to the largest one, the first a sensing value corresponding to the neighboring sensing electrode in one of the second sensing or the third sensing; and the first sensing, the second sensing according to the maximum one Or the third sensing is performed 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 The largest difference between the other two, ignoring the plurality of first sensing values, the plurality of second sensing values or the plurality of third sensing values corresponding to the largest one; according to the plurality of not ignored One of the first sensing value, the plurality of second sensing values, or the plurality of third sensing values, ignoring the sensing value of the sensing electrode of the at least two sensing electrodes; and Determining, by 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, determining the external conductive object relative to the plurality of sensing electrodes position.

In a further example, the processor is further configured to: find, according to each of the at least two sensing electrodes, the first sensing value, the second sensing value, and the third sensing value. The difference between the other and the other two, and take the average of the other two; and according to the The average sensed value corresponding to each of the sensing electrodes of the two sensing electrodes determines the position of the external conductive object relative to the plurality of sensing electrodes.

In an embodiment, the present application provides an electronic system for reducing interference when a pixel is updated, including: 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 configured to: perform a first sensing on the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes The second sensing is performed to obtain a plurality of second sensing values; and after the interval time, the plurality of sensing electrodes are subjected to a third sensing to obtain a plurality of third sensing values. The processor is configured to: add 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 to each of the plurality of sensing values a sum of the measured values; determining, according to the sum of the plurality of sensing values, an external conductive object adjacent to the touch screen in the vicinity of at least two adjacent sensing electrodes; and according to the plurality of first senses Determining, by the one of the plurality of second sensing values and the plurality of third sensing values, a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes The horizontal axis of the pixel with the touch screen is parallel to each other.

Please refer to FIG. 5 , 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 embodiment of Table 2, and the obtained interval time can be used in FIG. 3A. D is in the embodiment of Figures 4A-D. Step 510: Set an interval time, for example, given an initial value. Step 520: Determine that the touch screen does not have any adjacent external conductive objects. Step 530: Perform three sensing on the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values, a plurality of second sensing values, and a plurality of third sensing values, each sensing The interval is separated. This step 530 is the same as steps 310-330. Step 540: Determine the plurality of first sensing Is the value, the plurality of second sensed values, and the plurality of third sensed values having only a single maximum value? If yes, proceed to step 550, otherwise proceed to step 570. Step 550: Determine whether the three maximum values correspond to the adjacent three sensing electrodes? If so, proceed to step 560, otherwise proceed to step 570. Step 560: Store the interval. Step 570: Adjust the interval time. For example, when the three maximum values correspond to the same or two adjacent sensing electrodes, the interval time is increased. For example, when the 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 for obtaining an interval time for performing a touch processing method for reducing interference during pixel update, including: a sensing circuit and a connection. To a processor of the sensing circuit. The sensing circuit is configured to: perform a first sensing on the plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; and after an interval time, perform the plurality of sensing electrodes The second sensing is performed to obtain a plurality of second sensing values; and after the interval time, the plurality of sensing electrodes are subjected to a third sensing to obtain a plurality of third sensing values. The processor is configured to: determine whether the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values have only a single maximum value; when the plurality of first sensing When the value, the plurality of second sensing values and the plurality of third sensing values have only a single maximum value, determining whether the three maximum values correspond to the adjacent three sensing electrodes; if the three maximum values The interval time is stored corresponding to the adjacent three sensing electrodes, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

In an embodiment, the present application provides an electronic system for obtaining an interval to perform a touch processing method for reducing interference during pixel update, including: a touch screen; a circuit; and a processor coupled to the sensing circuit. The sensing circuit is configured to: perform a first sensing on a plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; after an interval time, performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing values; and after the interval, the plurality of sensing The sensing electrode performs a third sensing to obtain a plurality of third sensing values. The processor is configured to: determine whether the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values have only a single maximum value; when the plurality of first sensing When the value, the plurality of second sensing values and the plurality of third sensing values have only a single maximum value, determining whether the three maximum values correspond to the adjacent three sensing electrodes; if the three maximum values The interval time is stored corresponding to the adjacent three sensing electrodes, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other.

Claims (23)

A touch processing method for reducing interference when a pixel is updated, comprising: performing first sensing on a plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; at an interval time And performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing values; after the interval time, performing a third sensing on the plurality of sensing electrodes to obtain multiple a third sensing value; 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 a sum of values; determining, according to the sum of the plurality of sensing values, an external conductive object in the vicinity of the Nth sensing electrodes of the plurality of sensing electrodes is adjacent to the touch screen; and according to the plurality of first sensing values, Determining, by the one of the plurality of second sensing values and the plurality of third sensing values, a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes and the touch The horizontal axes of the pixels of the screen are parallel to each other. The touch processing method of claim 1, wherein the determining the location further comprises: ignoring the first sensing value corresponding to the N-1th sensing electrode among the plurality of first sensing values; And determining the position of the external conductive object relative to the plurality of sensing electrodes according to the plurality of first sensing values. The touch processing method of claim 1, wherein the determining the location further comprises: ignoring the third sensing value corresponding to the (N+1)th sensing electrode among the plurality of third sensing values; And determining the position of the external conductive object relative to the plurality of sensing electrodes according to the plurality of third sensing values. The touch processing method of claim 1, wherein the determining the location further comprises: finding the first sensing value corresponding to the Nth sensing electrode, the second sensing value, and the third a minimum of the sensed values; finding one of the plurality of first sensed values, the plurality of second sensed values, or the plurality of third sensed values corresponding to the smallest one; ignoring the minimum One of the plurality of first sensing values, the plurality of second sensing values, or the plurality of third sensing values corresponding to the N-1th sensing electrode and the N+th Sensing value of one 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 minimum one The position of the outer conductive object relative to the plurality of sensing electrodes is determined. The touch processing method of claim 4, wherein the step of determining the location further comprises: ignoring the plurality of first sensing values, the plurality of second sensing values, or the plurality corresponding to the smallest one Among the third sensing values, the sensing values of the N-2th sensing electrode and the N+2th sensing electrode are corresponding. A touch processing device for reducing interference when a pixel is updated, comprising: a sensing circuit, configured to: perform sensing for a plurality of sensing electrodes on a touch screen for a first time to obtain a plurality of first Sensing a value; after an interval of time, performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing values; and after the interval time, performing the plurality of sensing electrodes Three times of sensing to obtain a plurality of third sensing values; and a processor coupled to the sensing circuit, configured to: the plurality of first sensing values corresponding to the plurality of sensing electrodes, the The plurality of second sensing values and the plurality of third sensing values are respectively added to a total of the plurality of sensing values; determining, according to the sum of the plurality of sensing values, the Nth sensing of the plurality of sensing electrodes An external conductive object is adjacent to the touch screen in the vicinity of the electrode; and the external conductive object is determined according to the plurality of first sensed values, the plurality of second sensed values, and one of the plurality of third sensed values a position of the plurality of sensing electrodes, wherein the plurality of sensing electrodes and the image of the touch screen The horizontal axes are parallel to each other. The touch processing device of claim 6, wherein the processor is further configured to: ignore the first sensing value corresponding to the N-1th sensing electrode among the plurality of first sensing values; Determining the position of the external conductive object relative to the plurality of sensing electrodes according to the plurality of first sensing values. The touch processing device of claim 6, wherein the processor is further configured to: ignore the third sensing value corresponding to the (N+1)th sensing electrode among the plurality of third sensing values; And determining the position of the external conductive object relative to the plurality of sensing electrodes according to the plurality of third sensing values. The touch processing device of claim 6, wherein the processor is further configured to: find the first sensing value, the second sensing value, and the third feeling corresponding to the Nth sensing electrode a minimum of the measured values; finding 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; ignoring the minimum one Corresponding 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 N-1th sensing electrode and the N+1th Sensing a sensing value of the sensing electrode; and determining, according to the plurality of first sensing values, the plurality of second sensing values, or one of the plurality of third sensing values corresponding to the minimum The position of the outer conductive object relative to the plurality of sensing electrodes. The touch processing device of claim 9, wherein the processor is further configured to: ignore the plurality of first sensing values, the plurality of second sensing values, or the plurality of Among the three sensing values, the sensing values of the N-2th sensing electrode and the N+2th sensing electrode are corresponding. An electronic system used to reduce interference when updating pixels, including: a touch screen; a touch processing device connected to the touch screen, further comprising: a sensing circuit, configured to: perform a first sensing on the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values; after an interval of time, performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing values; and after the interval, the plurality of sensing The measuring electrode performs a third sensing to obtain a plurality of third sensing values; and a processor coupled to the sensing circuit, configured to: the plurality of first senses corresponding to the plurality of sensing electrodes The measured value, the plurality of second sensing values and the plurality of third sensing values are respectively added to a total of the plurality of sensing values; and the first of the plurality of sensing electrodes is determined according to the sum of the plurality of sensing values An external conductive object is adjacent to the touch screen in the vicinity of the N sensing electrodes; and determining the one of the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values. a position of the outer conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes and the touch screen The horizontal axes of the pixels are parallel to each other. A touch processing method for reducing interference when a pixel is updated, comprising: performing first sensing on a plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; at an interval time And performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing values; after the interval time, performing a third sensing on the plurality of sensing electrodes to obtain multiple a third sensing value; the plurality of first sensing values corresponding to the plurality of sensing electrodes, the plurality of second sensing values, and the The plurality of third sensing values are respectively added to the sum of the plurality of sensing values; determining, according to the sum of the plurality of sensing values, an external conductive object in the vicinity of at least two adjacent sensing electrodes of the plurality of sensing electrodes Proximate to the touch screen; and determining, according to the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values, the external conductive object relative to the plurality of senses a position of the measuring electrode, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other. The touch processing method of claim 12, wherein the step of determining the location further comprises: first sensing the first sensing value corresponding to the sensing electrode according to one of the at least two sensing electrodes, the second Determining, by the largest one of the sensing value and the third sensing value, which of the first sensing, the second sensing, or the third sensing is performed; ignoring the corresponding one And one of the first sensing, the second sensing, or the third sensing, corresponding to the sensing value of the neighboring sensing electrode; and the first corresponding to the largest one The second sensing, the second sensing, or the third sensing is performed to determine the position of the external conductive object relative to the plurality of sensing electrodes. The touch processing method of claim 12, wherein the determining the location further comprises: according to each of the at least two sensing electrodes, the first sensing value, the second sensing value, and the The difference between the other of the three sensed values is the largest, and the plurality of first sensed values, the plurality of second sensed values, or the plurality of third sensed values corresponding to the largest one are ignored. ; Ignoring one of the at least two sensing electrodes 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 a sensing value of the electrode; and determining, 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, determining the external conductive object relative to The position of the plurality of sensing electrodes. The touch processing method of claim 12, wherein the determining the location further comprises: finding the first sensing value and the second sensing value according to each of the at least two sensing electrodes And the difference between the other two of the third sensing values, and the average of the other two; and the average sense of the sensing electrodes according to each of the at least two sensing electrodes The measured value determines the position of the external conductive object relative to the plurality of sensing electrodes. A touch processing device for reducing interference when a pixel is updated, comprising: a sensing circuit, configured to: perform sensing for a plurality of sensing electrodes on a touch screen for a first time to obtain a plurality of first Sensing a value; after an interval of time, performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing values; and after the interval time, performing the plurality of sensing electrodes Three times of sensing to obtain a plurality of third sensing values; and a processor coupled to the sensing circuit, configured to: the plurality of first sensing values corresponding to the plurality of sensing electrodes, the The plurality of second sensing values and the plurality of third sensing values are respectively added up to a total of the plurality of sensing values; determining, according to the sum of the plurality of sensing values, at least two of the plurality of sensing electrodes An external conductive object is adjacent to the touch screen in the vicinity of the adjacent sensing electrode; and determining according to the plurality of first sensing values, the plurality of second sensing values, and one of the plurality of third sensing values a position of the external conductive object relative to the plurality of sensing electrodes, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other. The touch processing device of claim 16, wherein the processor is further configured to: according to the first sensing value corresponding to the sensing electrode of the at least two sensing electrodes, the second sensing Determining, by the largest one of the measured value and the third sensing value, which of the first sensing, the second sensing, or the third sensing is performed; ignoring the corresponding one a sensing value corresponding to the neighboring sensing electrode in one of the first sensing, the second sensing, or the third sensing; and the first time corresponding to the largest one The sensing, the second sensing or the third sensing is performed to determine the position of the external conductive object relative to the plurality of sensing electrodes. The touch processing device of claim 16, wherein 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 first The difference between the three of the three sensed values and the other two is the largest, ignoring the plurality of first sensed values, the plurality of second sensed values, or the plurality of third sensed values corresponding to the largest one; Ignoring one of the at least two sensing electrodes 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 a sensed value of the electrode; and the plurality of first sensed values, the plurality of second sensed values, or the plurality of third senses that are not ignored One of the measured values determines the position of the outer conductive object relative to the plurality of sensing electrodes. The touch processing device of claim 16, wherein the processor is further configured to: find, according to each of the at least two sensing electrodes, the first sensing value, the second sensing value, and The difference between the other of the three sensed values is the largest, and the average of the other two sensed values; and the average sense corresponding to each of the at least two sense electrodes a value that determines the position of the outer conductive object relative to the plurality of sensing electrodes. An electronic system for reducing interference during pixel update includes: a touch screen; a touch processing device connected to the touch screen, further comprising: a sensing circuit for: on the touch screen The plurality of sensing electrodes are first sensed to obtain a plurality of first sensing values; after an interval of time, the plurality of sensing electrodes are subjected to a second sensing to obtain a plurality of second senses Measured; and after the interval time, performing a third sensing on the plurality of sensing electrodes to obtain a plurality of third sensing values; and a processor coupled to the sensing circuit for: The plurality of first sensing values corresponding to the plurality of sensing electrodes, the plurality of second sensing values and the plurality of third sensing values are respectively added to a total of the plurality of sensing values; a sum of the sensing values, determining that an external conductive object is adjacent to the touch screen in the vicinity of at least two adjacent sensing electrodes of the plurality of sensing electrodes; and the plurality of second sensing values according to the plurality of first sensing values Sensing the value and one of the plurality of third sensing values to determine the external conductive object phase To the plurality of sensing a position of the electrode, The plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other. A touch processing method for obtaining an interval time for performing another touch processing method for reducing interference during pixel update by using the interval time, including: setting the interval time; determining that a touch screen does not have any proximity An external conductive object; performing three sensing on the plurality of sensing electrodes on the touch screen to obtain a plurality of first sensing values, a plurality of second sensing values, and a plurality of third sensing values, each sensing Between the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values, whether there is only a single maximum value; when the plurality of first senses When the measured value, the plurality of second sensing values and the plurality of third sensing values have only a single maximum value, determining whether the three maximum values correspond to the adjacent three sensing electrodes; and when the three maximum When the value corresponds to the adjacent three sensing electrodes, the interval time is stored, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other. A touch processing device is configured to obtain an interval time for performing a touch processing method for reducing interference during pixel update by using the interval time, comprising: a sensing circuit, configured to: on a touch screen The plurality of sensing electrodes perform a first sensing to obtain a plurality of first sensing values; after an interval time, performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing a value; and after the interval time, performing a third sensing on the plurality of sensing electrodes to obtain a plurality of third sensing values; a processor connected to the sensing circuit, configured to: determine whether the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values have a single maximum value When the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values have only a single maximum value, determining whether the three maximum values correspond to the adjacent three The sensing electrode stores the interval time if the three maximum values correspond to the adjacent three sensing electrodes, wherein the plurality of sensing electrodes and the horizontal axis of the pixel of the touch screen are parallel to each other. An electronic system for obtaining a time interval for performing a touch processing method for reducing interference during pixel update, comprising: a touch screen; a touch processing device connected to the touch screen, The touch processing device further includes: a sensing circuit, configured to: perform a first sensing on the plurality of sensing electrodes on a touch screen to obtain a plurality of first sensing values; after an interval time Performing a second sensing on the plurality of sensing electrodes to obtain a plurality of second sensing values; and after the interval time, performing a third sensing on the plurality of sensing electrodes to obtain a plurality of a third sensing value; and a processor connected to the sensing circuit, configured to: determine the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values, Whether there is only a single maximum value; when the plurality of first sensing values, the plurality of second sensing values, and the plurality of third sensing values have only a single maximum value, determining three maximum values Whether it corresponds to three adjacent sensing electrodes; if the three maximum values correspond to Three adjacent sensing electrodes, storing the time interval, wherein the plurality of pixel electrodes and sensing the touch screen and the horizontal axis parallel to each other.