CN106951133B - Driving method of touch panel, touch panel and touch display device - Google Patents
Driving method of touch panel, touch panel and touch display device Download PDFInfo
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- CN106951133B CN106951133B CN201710201953.8A CN201710201953A CN106951133B CN 106951133 B CN106951133 B CN 106951133B CN 201710201953 A CN201710201953 A CN 201710201953A CN 106951133 B CN106951133 B CN 106951133B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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Abstract
The application discloses a driving method of a touch panel, the touch panel and a touch display device. The integrated chip executes self-contained scanning detection on the first touch electrode and the second touch electrode to obtain a self-contained scanning detection result of the touch panel; the integrated chip analyzes the self-contained scanning detection result to determine the number of target first touch electrodes, the number of target second touch electrodes and the number of target second touch electrodes, which are subjected to touch operation, on the touch panel; when only one target first touch electrode and one target second touch electrode exist, the integrated chip continues to execute self-contained scanning detection; otherwise, the integrated chip continues to execute the mutual capacitance scanning detection. The driving method of the touch panel, the touch panel and the touch display device improve the detection sensitivity of the touch signal.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a driving method of a touch panel, a touch panel and a touch display device.
Background
With the continuous improvement of the application field and the process of the touch display technology, more touch driving electrodes can be arranged on the array substrate of the touch display panel, and more touch sensing electrodes can be arranged on the color film substrate, so as to improve the accuracy of the touch display screen in sensing touch signals.
With the market demand for large-size touch display screens becoming higher and higher, the sizes of the array substrate and the color film substrate of the touch display screen are also increasing, and the number of touch driving electrodes on the array substrate and the number of touch sensing electrodes on the color film substrate are also increasing. And in the touch control stage, the integrated drive circuit sequentially sends touch control scanning signals to each touch control drive electrode and receives sensing signals output by the touch control sensing electrodes. In practice, the operation of the touch display screen by the user through one finger (i.e. single touch signal) accounts for a large proportion of the total operation (sum of single touch signal and multiple touch signals). Although a plurality of touch signals at any position on the touch display screen can be detected according to the existing signal processing mode at the touch stage, the scanning mode consumes too much electric power when scanning one finger. In addition, in the existing touch stage, a cyclic scanning mode is adopted to scan the touch signal, so that the time spent on detecting one finger is longer, the detection speed is slower, and the sensitivity of detecting the touch signal is not high.
Disclosure of Invention
In view of the foregoing defects in the prior art, embodiments of the present application provide a driving method of a touch panel, a touch panel and a touch display device to solve the technical problems mentioned in the background section above.
In order to achieve the above object, in a first aspect, an embodiment of the present application provides a driving method for a touch panel, where the touch panel includes an integrated chip, and a first touch electrode and a second touch electrode that are arranged in an intersecting manner, and the driving method includes: the integrated chip executes self-contained scanning detection on the first touch electrode and the second touch electrode to obtain a self-contained scanning detection result of the touch panel; the integrated chip analyzes the self-contained scanning detection result to determine the number of target first touch electrodes, the number of target second touch electrodes and the number of target second touch electrodes on the touch panel, wherein the touch operations occur on the touch panel; when only one target first touch electrode and one target second touch electrode exist, the integrated chip continues to execute self-contained scanning detection; otherwise, the integrated chip continues to execute the mutual capacitance scanning detection.
In a second aspect, the present application provides a touch panel, including an integrated chip, and a first touch electrode and a second touch electrode arranged in a crossing manner; in the touch stage, the integrated chip is used for: performing self-contained scanning detection on the first touch electrode and the second touch electrode to obtain a self-contained scanning detection result of the touch panel; analyzing the self-contained scanning detection result to determine the number of target first touch electrodes, the number of target second touch electrodes and the number of target second touch electrodes on the touch panel, wherein the touch operations occur on the touch panel; and when determining that a plurality of target first touch electrodes and target second touch electrodes exist, performing mutual capacitance scanning detection on each target first touch electrode and each target second touch electrode to obtain a result of the mutual capacitance scanning detection of the touch panel.
In a third aspect, the present application provides a touch display device, including the touch panel of the second aspect.
According to the driving method of the touch panel, the touch panel and the touch display device, firstly, the touch panel is subjected to self-contained scanning detection, and quick identification of a single touch signal can be realized; and when the self-capacitance scanning detects that the touch signal is not the single touch signal, performing mutual capacitance scanning detection. The electric quantity consumed by detecting the touch signal is reduced, and the detection sensitivity of the touch signal is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings in which:
fig. 1 is a flowchart of a driving method of a touch panel provided in the present application;
fig. 2 is a schematic perspective view of a touch panel provided in the present application;
FIG. 3 is a schematic diagram illustrating the integrated chip detecting a touch signal via the first touch electrode and the second touch electrode during a self-contained scan detection and a single touch signal;
FIG. 4 is a waveform diagram corresponding to the waveforms on the first touch electrode and the second touch electrode of FIG. 3;
FIG. 5 is a schematic diagram illustrating the case of self-contained scan detection and multiple touch signals in a row, where the integrated chip detects the touch signals through the first touch electrode and the second touch electrode;
FIG. 6 is a waveform diagram corresponding to the waveforms on the first touch electrode and the second touch electrode of FIG. 5;
FIG. 7 is a diagram illustrating the integrated chip detecting touch signals via the first touch electrode and the second touch electrode in the case of self-contained scan detection and multiple touch signals in a row;
FIG. 8 is a waveform diagram corresponding to the waveforms on the first touch electrode and the second touch electrode of FIG. 7;
FIG. 9 is a schematic diagram illustrating the integrated chip detecting a touch signal via the first touch electrode and the second touch electrode during self-contained scan detection and multi-touch signal;
FIG. 10 is a waveform diagram corresponding to the waveforms on the first touch electrode and the second touch electrode of FIG. 9;
FIG. 11 is a schematic diagram illustrating the integrated chip detecting the first touch electrode and the second touch electrode by mutual capacitance scanning after the touch signal is detected by the self-capacitance scanning detection in FIG. 9;
FIG. 12 is a waveform diagram corresponding to the waveforms on the first and second touch electrodes of FIG. 11;
fig. 13 is a schematic diagram of a display device provided in the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Please refer to fig. 1, which shows a flowchart of a driving method of a touch panel provided in the present application. The touch panel comprises an integrated chip, and a first touch electrode and a second touch electrode which are arranged in a crossed mode. The driving method of the touch panel comprises the following steps:
During self-capacitance scanning detection, the integrated chip sends self-capacitance scanning signals to the first touch electrode and the second touch electrode respectively. After receiving the self-capacitance scanning signal, the first touch electrode and the second touch electrode respectively sense the touch signal through the self-capacitance scanning signal and return the respective self-capacitance sensing signal to the integrated chip. And the integrated chip compares self-capacitance scanning signals and self-capacitance induction signals returned by the first touch electrode and the second touch electrode respectively to determine a self-capacitance scanning detection result.
In some optional implementations of this embodiment, the self-contained scan detection includes: the integrated chip sends a first self-capacitance scanning signal to the first touch electrode and receives a first self-capacitance induction signal output by the first touch electrode; the integrated chip sends a second self-capacitance scanning signal to the second touch electrode and receives a second self-capacitance induction signal output by the second touch electrode.
The integrated chip sends self-capacitance scanning signals to each first touch electrode and each second touch electrode respectively and receives self-capacitance induction signals output by each first touch electrode and each second touch electrode. At this time, the integrated chip can determine which touch electrodes sense the touch signals by comparing the self-capacitance scanning signals and the self-capacitance sensing signals on each touch electrode (the first touch electrode or the second touch electrode).
The integrated chip sends self-capacitance scanning signals to each first touch electrode and each second touch electrode and receives self-capacitance induction signals output by each first touch electrode and each second touch electrode. By comparing the self-capacitance scanning signal and the self-capacitance sensing signal on each touch electrode (the first touch electrode or the second touch electrode), it can be determined which touch electrodes (i.e. the target first touch electrode and/or the target second touch electrode) sense the touch signals, and the number of the target first touch electrodes and the number of the target second touch electrodes can be determined by the target first touch electrodes and the target second touch electrodes sensing the touch signals (i.e. touch operation occurs).
For example, if there is only one target first touch electrode and one target second touch electrode, there is one touch signal on the touch panel; if there is only one target first touch electrode and a plurality of target second touch electrodes, or a plurality of target first touch electrodes and one target second touch electrode, there are a plurality of touch signals in a row or a column on the touch panel, and the number of touch signals is the number of the plurality of target second touch electrodes or the plurality of target first touch electrodes; if there are a plurality of target first touch electrodes and a plurality of target second touch electrodes, there are a plurality of dispersed touch signals on the touch panel, and the number of touch signals may have a plurality of possibilities according to the arrangement and combination of the target first touch electrodes and the target second touch electrodes.
As can be seen from the above description, the integrated chip may determine the target first touch electrodes and the target second touch electrodes, and the number of the target first touch electrodes and the number of the target second touch electrodes by sending the self-capacitance scanning signal to each first touch electrode and each second touch electrode and receiving the self-capacitance sensing signal output by each first touch electrode and each second touch electrode.
In general, a single touch signal is likely to occur on the touch panel if the integrated chip detects that a touch signal is sensed by one target first touch electrode and a touch signal is sensed by only one target second touch electrode. The touch control panel is provided with only one touch control point, and the position of the touch control signal on the touch control panel can be determined through the number of the target first touch control electrode and the number of the target second touch control electrode, so that the touch control signal can be quickly identified, the sensitivity of detecting the touch control signal is improved, and the electric quantity can be saved. And finally, in the next touch control stage, the integrated chip continues to execute self-contained scanning detection. If the integrated chip detects a plurality of target first touch electrodes or a plurality of target second touch electrodes, the self-contained scanning detection cannot determine the position of the touch signal on the touch panel except for the presence of the row or column of the plurality of touch signals. At this time, mutual capacitance scanning detection needs to be performed to determine the position of each touch signal on the touch panel.
In some optional implementations of this embodiment, the above-mentioned mutual capacitance scan detection includes: the integrated chip sends mutual capacitance scanning signals to the target second touch control electrodes one by one and receives mutual capacitance induction signals output by the target first touch control electrodes.
When there are multiple touch signals, although the position of the touch signal on the touch panel cannot be specifically determined through the self-contained scanning detection, a target first touch electrode or a target second touch electrode corresponding to the touch signal can be determined. Therefore, during mutual capacitance scanning detection, the integrated chip can determine the position of the touch signal on the touch panel by only sending a mutual capacitance scanning signal to the target second touch electrode one by one and receiving a mutual capacitance induction signal output by the target first touch electrode.
In some optional implementation manners of this embodiment, the touch panel includes a color film substrate and an array substrate that are disposed opposite to each other; the first touch electrode is arranged on the upper surface of the color film substrate, or the first touch electrode is arranged on the inner surface of the color film substrate, wherein the upper surface of the color film substrate is opposite to the array substrate, and the inner surface of the color film substrate is opposite to the array substrate; the second touch electrode is disposed on the array substrate.
The touch panel comprises a color film substrate and an array substrate, wherein the color film substrate and the array substrate are arranged oppositely, and the color film substrate is usually positioned on the array substrate. The color film substrate is provided with a first touch electrode, and the array substrate is provided with a second touch electrode. The first touch electrode may be disposed on a surface of the color filter substrate away from the array substrate (i.e., an upper surface of the color filter substrate), or may be disposed on a surface of the color filter substrate close to the array substrate (i.e., an inner surface of the color filter substrate). The array substrate is provided with a second touch electrode, and the second touch electrode is usually disposed on a surface close to the color filter substrate.
And the integrated chip sends a common voltage signal to each second touch electrode in the display stage. In the display stage, each of the first touch electrodes is suspended or grounded.
The embodiment also provides a touch panel, which comprises an integrated chip, and a first touch electrode and a second touch electrode which are arranged in a crossed manner; in the touch stage, the integrated chip is used for: performing self-contained scanning detection on the first touch electrode and the second touch electrode to obtain a self-contained scanning detection result of the touch panel; analyzing the self-contained scanning detection result to determine the number of target first touch electrodes, the number of target second touch electrodes and the number of target second touch electrodes on the touch panel, wherein the touch operations occur on the touch panel; and when determining that a plurality of target first touch electrodes and target second touch electrodes exist, performing mutual capacitance scanning detection on each target first touch electrode and each target second touch electrode to obtain a result of the mutual capacitance scanning detection of the touch panel.
The touch panel comprises a color film substrate and an array substrate which are oppositely arranged; the first touch electrode is arranged on the upper surface of the color film substrate, or the first touch electrode is arranged on the inner surface of the color film substrate, wherein the upper surface of the color film substrate is opposite to the array substrate, and the inner surface of the color film substrate is opposite to the array substrate; the second touch electrode is disposed on the array substrate. In the display stage, the second touch electrode is reused as a common electrode, so that common electrode devices are reduced. And the integrated chip sends a common voltage signal to each second touch electrode.
In the touch stage, the touch panel of this embodiment adopts a self-capacitance scanning detection mode, and the integrated chip sends the first self-capacitance scanning signal to each first touch electrode and receives the first self-capacitance sensing signal output by each first touch electrode. By comparing the first self-capacitance scanning signal and the first self-capacitance sensing signal of the same first touch electrode, whether the first touch electrode detects a touch signal can be determined. Similarly, the integrated chip sends a second self-capacitance scanning signal to each second touch electrode and receives a second self-capacitance induction signal output by each second touch electrode. And comparing a second self-capacitance scanning signal and a second self-capacitance sensing signal of the same second touch electrode to determine whether the second touch electrode detects a touch signal. During the self-contained scanning detection period, if the integrated chip only detects one target first touch electrode and one target second touch electrode, it indicates that only one touch signal is present on the touch panel. The touch signal is quickly detected, and the sensitivity of detecting the touch signal is improved. If the integrated chip detects a plurality of target first touch electrodes or a plurality of target second touch electrodes under self-contained scanning detection, mutual-contained scanning detection needs to be performed on the detected plurality of target first touch electrodes or the detected plurality of target second touch electrodes, and the corresponding relationship between the plurality of target first touch electrodes and the plurality of target second touch electrodes is further determined, so that the position of the touch signal on the touch panel is determined.
According to the driving method of the touch panel, firstly, self-contained scanning detection is carried out on the touch panel, and quick identification of a single touch signal can be realized; and when the self-capacitance scanning detects that the touch signal is not the single touch signal, performing mutual capacitance scanning detection. The electric quantity consumed by detecting the touch signal is reduced, and the detection sensitivity of the touch signal is improved.
Please refer to fig. 2, which shows a schematic perspective view of a touch panel provided in the present application.
As shown in fig. 2, the touch display panel includes an array substrate 201 and a color filter substrate 202 disposed opposite to the array substrate 201. The touch driving electrode 210 (second touch electrode) and the integrated driving circuit 211 may be disposed on the array substrate 201. The touch driving electrodes 212 are disposed on the array substrate 201 and extend along the second direction, and are arranged along the first direction. Wherein the first direction intersects the second direction.
The color filter substrate 202 includes a plurality of touch sensing electrodes 220 (first touch electrodes), and an extending direction of the touch sensing electrodes 220 may intersect an extending direction of the touch driving electrodes 210. Further, the touch sensing electrodes 220 extend along a first direction, and the touch sensing electrodes 220 are arranged along the second direction, where the first direction intersects with the second direction.
In a further embodiment, the array substrate 201 is provided with data lines and scan lines (not shown in fig. 2), the second direction may be the same as the extending direction of the scan lines, and the first direction may be the same as the extending direction of the data lines.
In this embodiment, the touch display panel 200 may further include a flexible circuit board 221. The array substrate 201 further includes an integrated chip 211. The color filter substrate 202 may have a touch signal line 222 thereon, the touch sensing electrode 220 is electrically connected to the flexible circuit board 221 through the touch signal line 222, and the flexible circuit board 221 is electrically connected to the integrated chip 211. Therefore, after the touch signal lines 222 electrically connected to the touch sensing electrodes 220 on the color filter substrate 202 are converged and electrically connected to the flexible circuit board 221, the flexible circuit board 221 is electrically connected to the integrated chip 211, so that the integrated chip 211 can receive signals returned by the touch sensing electrodes 220.
Fig. 3 is a schematic diagram illustrating that the integrated chip detects a touch signal through the first touch electrode and the second touch electrode when the touch signal is a single touch signal. The touch panel in fig. 3 includes 5 first touch electrodes (1-1, 1-2, 1-3, 1-4, and 1-5) and 5 second touch electrodes (2-1, 2-2, 2-3, 2-4, and 2-5). In the touch control stage, the integrated chip sends a first self-capacitance scanning signal to each first touch control electrode and receives a first self-capacitance induction signal output by each first touch control electrode; the integrated chip sends a second self-capacitance scanning signal to each second touch electrode and receives a second self-capacitance induction signal output by each second touch electrode. That is, each first touch electrode and each second touch electrode individually detect a touch signal. Taking fig. 3 with only one touch signal as an example, during the self-capacitance scanning detection, the integrated chip respectively sends the self-capacitance scanning signal to 5 first touch electrodes (1-1, 1-2, 1-3, 1-4 and 1-5) and 5 second touch electrodes (2-1, 2-2, 2-3, 2-4 and 2-5), and receives the self-capacitance sensing signal output by 5 first touch electrodes (1-1, 1-2, 1-3, 1-4 and 1-5) and 5 second touch electrodes (2-1, 2-2, 2-3, 2-4 and 2-5). Through comparison of the self-capacitance scanning signal and the self-capacitance sensing signal, it is found that the first touch electrodes 1-2 and the second touch electrodes 2-3 sense the touch signals, and no other first touch electrode or second touch electrode senses the touch signals. At this time, the position of the touch signal on the touch panel can be determined by the first touch electrode 1-2 and the second touch electrode 2-3, and fig. 4 shows waveforms output on each first touch electrode and each second touch electrode when the input is a square wave. Wherein GND represents ground; the square wave with the reticulate pattern is the waveform of the detected touch signal; the square wave without the reticulate pattern is a waveform without detecting the touch signal; the blank period is a waveform corresponding to a non-display area on the touch display panel. Fig. 3 illustrates that there are 4 square waves during touch, and a touch signal is detected during the period from the 2 nd square wave to the 4 th square wave during touch. It should be noted that, in the embodiment, 4 square waves exist in the touch control period as an example for description, and the number of the square waves in the touch control period can be set by itself according to needs, which is not limited herein. And the square wave can be replaced by other types of wave forms, and the wave forms are selected according to actual needs.
Fig. 5 is a schematic diagram illustrating a case where multiple touch signals are aligned in a row, and an integrated chip detects the touch signals through a first touch electrode and a second touch electrode. In fig. 5, in the touch phase, the integrated chip sends self-capacitance scanning signals to 5 first touch electrodes (1-1, 1-2, 1-3, 1-4 and 1-5) and 5 second touch electrodes (2-1, 2-2, 2-3, 2-4 and 2-5) respectively, and receives self-capacitance sensing signals output by the 5 first touch electrodes (1-1, 1-2, 1-3, 1-4 and 1-5) and the 5 second touch electrodes (2-1, 2-2, 2-3, 2-4 and 2-5). Comparing the self-capacitance scanning signal with the self-capacitance sensing signal to find that the first touch electrodes 1-2, 1-3 and 1-5 sense the touch signals; the second touch electrodes 2-3 sense a touch signal. Thus, it can be determined that 3 touch signals are detected by the self-contained scanning, and the touch signals can be determined to be arranged in a row on the touch panel according to the first touch electrodes 1-2, the first touch electrodes 1-3, the first touch electrodes 1-5 and the second touch electrodes 2-3, and fig. 6 is a waveform output on each first touch electrode and each second touch electrode when the input is a square wave.
Fig. 7 is a schematic diagram illustrating a case where multiple touch signals are aligned in a row, and an integrated chip detects the touch signals through a first touch electrode and a second touch electrode. In fig. 7, in the touch phase, the integrated chip sends self-capacitance scanning signals to the 5 first touch electrodes (1-1, 1-2, 1-3, 1-4 and 1-5) and the 5 second touch electrodes (2-1, 2-2, 2-3, 2-4 and 2-5) respectively, and receives self-capacitance sensing signals output by the 5 first touch electrodes (1-1, 1-2, 1-3, 1-4 and 1-5) and the 5 second touch electrodes (2-1, 2-2, 2-3, 2-4 and 2-5). Comparing the self-capacitance scanning signal with the self-capacitance sensing signal to find that the first touch electrode 1-2 senses the touch signal; the second touch electrode 2-1, the second touch electrode 2-4 and the second touch electrode 2-5 sense a touch signal. Thus, it can be determined that 3 touch signals are detected by the self-contained scanning, and the touch signals can be determined to be arranged in a line on the touch panel according to the first touch electrodes 1-2, the second touch electrodes 2-1, the second touch electrodes 2-4 and the second touch electrodes 2-5, and fig. 8 shows waveforms output on the first touch electrodes and the second touch electrodes when the input is a square wave.
Fig. 9 is a schematic diagram illustrating the integrated chip detecting a touch signal through the first touch electrode and the second touch electrode when a multi-touch signal is detected. During self-capacitance scanning detection, the integrated chip respectively sends self-capacitance scanning signals to the 5 first touch electrodes (1-1, 1-2, 1-3, 1-4 and 1-5) and the 5 second touch electrodes (2-1, 2-2, 2-3, 2-4 and 2-5) and receives self-capacitance sensing signals output by the 5 first touch electrodes (1-1, 1-2, 1-3, 1-4 and 1-5) and the 5 second touch electrodes (2-1, 2-2, 2-3, 2-4 and 2-5). Through comparison of the self-capacitance scanning signal and the self-capacitance sensing signal, it is found that the first touch electrode 1-1, the first touch electrode 1-2, the first touch electrode 1-5, the second touch electrode 2-2, the second touch electrode 2-3 and the second touch electrode 2-4 all sense the touch signal. However, during the self-contained scanning detection, each first touch electrode and each second touch electrode independently detect the touch signal. Therefore, after knowing that the touch signals are detected by the first touch electrodes and/or the second touch electrodes, the integrated chip cannot determine the corresponding relationship between the first touch electrodes and/or the second touch electrodes, and thus cannot determine the position of the touch signals on the touch panel. At this time, the position of the touch signal on the touch panel cannot be determined as in fig. 5 and 7, and fig. 10 shows waveforms output from the first touch electrodes and the second touch electrodes when a square wave is input. This requires performing mutual capacitance scan detection, and fig. 10 illustrates that a touch signal is detected during the 3 rd square wave to the 4 th square wave during touch.
During the self-contained scanning detection, it is detected from fig. 9 that the first touch electrode 1-1, the first touch electrode 1-2, the first touch electrode 1-5, the second touch electrode 2-2, the second touch electrode 2-3, and the second touch electrode 2-4 all sense the touch signal. Therefore, the mutual capacitance scan detection is performed only on the first touch electrode 1-1, the first touch electrode 1-2, the first touch electrode 1-5, the second touch electrode 2-2, the second touch electrode 2-3, and the second touch electrode 2-4, as shown in fig. 11. As can be seen from fig. 11, the integrated chip only sends the mutual capacitance scanning signal to the second touch electrode 2-2, the second touch electrode 2-3, and the second touch electrode 2-4, and only receives the mutual capacitance sensing signal of the first touch electrode 1-1, the first touch electrode 1-2, and the first touch electrode 1-5. The integrated chip sequentially sends mutual capacitance scanning signals to the second touch electrode 2-2, the second touch electrode 2-3 and the second touch electrode 2-4, when the mutual capacitance scanning signals are sent to the second touch electrode 2-2, mutual capacitance induction signals of the first touch electrode 1-1, the first touch electrode 1-2 or the first touch electrode 1-5 are received, and if the integrated chip detects the mutual capacitance induction signals sent by the first touch electrode 1-1, the second touch electrode 2-2 and the first touch electrode 1-1 can determine a first touch signal; continuing to send a mutual capacitance scanning signal to the second touch electrode 2-3, if the integrated chip detects a mutual capacitance induction signal sent by the first touch electrode 1-5, determining that a second touch signal is determined by the second touch electrode 2-3 and the first touch electrode 1-5; the remaining second touch electrodes 2-4 and first touch electrodes 1-2 determine a third touch signal. Finally, the position of the touch signal on the touch panel is determined by the second touch electrode 2-2 and the first touch electrode 1-1, the second touch electrode 2-3 and the first touch electrode 1-5, and the second touch electrode 2-4 and the first touch electrode 1-2, as shown in fig. 11. Not only is the detection of the touch signal realized, but also the power consumption of the mutual capacitance scanning detection is reduced, and fig. 12 shows that when the self-capacitance scanning detection is converted into the mutual capacitance scanning detection, the input of the second touch electrode is a square wave, and the waveform output from the first touch electrode is a waveform.
In practice, the touch panel has a plurality of touch periods and display periods during the period when the touch signal exists (i.e., the period from the contact of the object to the touch panel to the separation of the object from the touch panel). Therefore, in the self-capacitance stage, the detection of the touch signal during the touch process can be divided into 2 cases: in the first case: during touch, at least the last square wave (the 4 th square wave) detects a touch signal. The method specifically comprises the following steps: the touch signal is detected during the period from the 1 st square wave to the 4 th square wave, the touch signal is detected during the period from the 2 nd square wave to the 4 th square wave, the touch signal is detected during the period from the 3 rd square wave to the 4 th square wave, and the touch signal is detected only by the 4 th square wave. Since there are a plurality of touch periods and display periods during which the touch signal exists, in the first case, when the square wave in the touch period detects the touch signal, the touch signal still exists on the touch panel, which can ensure that when the square wave in the subsequent touch period detects the touch signal and the first touch electrodes and the second touch electrodes changes from self-capacitance scanning detection to mutual capacitance scanning detection, the corresponding relationship between the touch signal and the first touch electrodes and the second touch electrodes can be detected by the square wave in the subsequent touch period, as shown in fig. 12. In fig. 12, during the mutual capacitance scanning detection, the integrated chip sequentially provides the square wave signal to the second touch electrode, and the first touch electrodes are all in the receiving state. Only the first touch electrode corresponding to the second touch electrode currently having the square wave signal can detect the touch signal. As can be seen from fig. 12, the second touch electrode 2-2 corresponds to the first touch electrode 1-1, the second touch electrode 2-3 corresponds to the first touch electrode 1-5, and the second touch electrode 2-4 corresponds to the first touch electrode 1-2. That is, there are 3 touch signals on the touch panel at this time, and the corresponding relationship between the 3 touch signals and the first touch electrode and the second touch electrode is as follows: touch signal 1(2-2, 1-1), touch signal 2(2-3, 1-5), and touch signal 1(2-4, 1-2).
In the second case: the last square wave does not detect the touch signal during the touch period, that is, the touch signal is detected during the period from the 1 st square wave to the 3 rd square wave, the touch signal is detected during the period from the 1 st square wave to the 2 nd square wave, and only the touch signal is detected by the 1 st square wave. The second case exists based on the first case, but there is no second case without the first case. Since the correspondence between the touch signal and the first touch electrode and each of the second touch electrodes can be detected in the first case, the second case does not interfere with the detection of the touch signal in the present embodiment.
It should be noted that fig. 3-12 are described by taking an example in which the touch panel includes 5 first touch electrodes and 5 second touch electrodes, and for the case that the touch panel includes other numbers of first touch electrodes and second touch electrodes, the embodiment has the same touch signal identification process, and details are not repeated here.
As shown in fig. 13, the touch display device 1300 includes the touch panel of each of the embodiments, and may be a mobile phone, a tablet computer, a wearable device, and the like. It is understood that the touch display device 1300 may further include a package film, a cover glass, and other known structures, which are not described herein again.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (8)
1. A driving method of a touch panel, the touch panel including an integrated chip, and a first touch electrode and a second touch electrode arranged in a cross manner, the driving method comprising:
the integrated chip executes self-contained scanning detection on the first touch electrode and the second touch electrode so as to obtain a self-contained scanning detection result of the touch panel;
the integrated chip analyzes the self-contained scanning detection result to determine the number of target first touch electrodes, the number of target second touch electrodes and the number of target second touch electrodes, which are subjected to touch operation, on the touch panel;
when only one target first touch electrode and one target second touch electrode exist, only one target first touch electrode and a plurality of target second touch electrodes exist, and the number of touch signals is the number of the plurality of target second touch electrodes, only a plurality of target first touch electrodes and one target second touch electrode exist, and the number of touch signals is the number of the plurality of target first touch electrodes, the integrated chip continues to execute self-contained scanning detection; otherwise, the integrated chip continues to execute mutual capacitance scanning detection; wherein the content of the first and second substances,
the self-contained scan detection comprises:
the integrated chip sends a first self-capacitance scanning signal to the first touch electrode and receives a first self-capacitance induction signal output by the first touch electrode;
the integrated chip sends a second self-capacitance scanning signal to the second touch electrode and receives a second self-capacitance induction signal output by the second touch electrode;
the mutual capacitance scan detection comprises:
the integrated chip sends mutual capacitance scanning signals to the target second touch control electrodes one by one and receives mutual capacitance induction signals output by the target first touch control electrodes.
2. The driving method according to claim 1, wherein the touch panel comprises a color film substrate and an array substrate which are arranged oppositely;
the first touch electrode is arranged on the upper surface of the color film substrate, or the first touch electrode is arranged on the inner surface of the color film substrate, wherein the upper surface of the color film substrate is opposite to the array substrate, and the inner surface of the color film substrate is opposite to the array substrate;
the second touch electrode is arranged on the array substrate.
3. The driving method according to claim 2, wherein the integrated chip sends a common voltage signal to each of the second touch electrodes during a display phase.
4. The driving method according to claim 3, wherein each of the first touch electrodes is suspended or grounded during the display phase.
5. A touch panel is characterized by comprising an integrated chip, a first touch electrode and a second touch electrode which are arranged in a crossed mode;
in a touch stage, the integrated chip is configured to:
performing self-contained scanning detection on the first touch electrode and the second touch electrode to obtain a self-contained scanning detection result of the touch panel;
analyzing the self-contained scanning detection result to determine a target first touch electrode, the number of the target first touch electrodes, the number of target second touch electrodes and the number of the target second touch electrodes, which are subjected to touch operation, on the touch panel; and
when only one target first touch electrode and one target second touch electrode exist, only one target first touch electrode and a plurality of target second touch electrodes exist, and the number of touch signals is the number of the plurality of target second touch electrodes, only a plurality of target first touch electrodes and one target second touch electrode exist, and the number of touch signals is the number of the plurality of target first touch electrodes, the integrated chip continues to execute self-contained scanning detection; when a plurality of target first touch electrodes and target second touch electrodes are determined to exist, performing mutual capacitance scanning detection on each target first touch electrode and each target second touch electrode to obtain a mutual capacitance scanning detection result of the touch panel; wherein the content of the first and second substances,
the self-contained scan detection comprises:
the integrated chip sends a first self-capacitance scanning signal to the first touch electrode and receives a first self-capacitance induction signal output by the first touch electrode;
the integrated chip sends a second self-capacitance scanning signal to the second touch electrode and receives a second self-capacitance induction signal output by the second touch electrode;
the mutual capacitance scan detection comprises:
the integrated chip sends mutual capacitance scanning signals to the target second touch control electrodes one by one and receives mutual capacitance induction signals output by the target first touch control electrodes.
6. The touch panel of claim 5, wherein the touch panel comprises a color film substrate and an array substrate that are arranged opposite to each other;
the first touch electrode is arranged on the upper surface of the color film substrate, or the first touch electrode is arranged on the inner surface of the color film substrate, wherein the upper surface of the color film substrate is opposite to the array substrate, and the inner surface of the color film substrate is opposite to the array substrate;
the second touch electrode is arranged on the array substrate.
7. The touch panel of claim 6, wherein in the display phase, the second touch electrode is reused as a common electrode;
and the integrated chip sends a common voltage signal to each second touch electrode.
8. Touch display device, comprising a touch panel according to one of claims 5 to 7.
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| WO2020087298A1 (en) * | 2018-10-30 | 2020-05-07 | 深圳市柔宇科技有限公司 | Touch-control display panel and bending detection method |
| CN110633029B (en) * | 2019-09-27 | 2023-08-08 | 京东方科技集团股份有限公司 | Self-mutual-capacitance touch module, control method thereof, touch screen and touch display device |
| CN111666004B (en) * | 2020-05-29 | 2021-08-24 | 深圳市鸿合创新信息技术有限责任公司 | Scanning control method and device for mutual capacitance type capacitive screen and mutual capacitance type capacitive screen |
| CN117597660A (en) * | 2022-06-16 | 2024-02-23 | 北京小米移动软件有限公司 | Touch detection method and device, communication equipment and storage medium |
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| CN103793115A (en) * | 2012-10-30 | 2014-05-14 | 瀚宇彩晶股份有限公司 | Method and device for determining positions of multi-touch of touch panel |
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