Touch control chip, display screen module and electronic equipment

Abstract

The utility model provides a touch chip, a display screen module and electronic equipment, the touch chip is used for being arranged in the electronic equipment, the electronic equipment comprises a plurality of transverse electrodes and a plurality of longitudinal electrodes, and the touch chip comprises a plurality of first touch pins and a plurality of second touch pins; the first touch pins are used for being connected with the transverse electrodes and outputting one of mutual capacitance driving signals and self-capacitance driving signals to the transverse electrodes; the second touch pin is used for being connected with the longitudinal electrode and outputting the other one of the mutual capacitance driving signal and the self-capacitance driving signal to the longitudinal electrode; wherein the mutual capacitance driving signal and the self-capacitance driving signal are different in signal amplitude and / or frequency. According to the touch chip provided by the embodiment of the invention, touch detection can be carried out by adopting a self-capacitance and mutual-capacitance superposition mode through the electrodes, so that the sensitivity of touch detection is improved.

Description

Technical Field

[0001] This application relates to the field of touch chip technology, and more particularly to a touch chip, a display screen module, and an electronic device. Background Technology

[0002] Touch technology is a human-computer interaction method. Users interact with electronic devices by touching or gesturing on the touch area of ​​the electronic device. With the development of smart devices, touch technology has become the mainstream operation method for mobile phones and other electronic devices. Mobile phones and other electronic devices receive touch commands input by users on the display screen and recognize the corresponding touch operations according to the touch commands.

[0003] Currently, electronic devices use self-capacitive electrodes to identify the user's touch position on the display screen.

[0004] However, when using a self-capacitive electrode scheme to identify the user's touch position, the high capacitance of the electrode to ground results in a low signal quantity, leading to low recognition sensitivity. Utility Model Content

[0005] In view of this, embodiments of this application provide a touch chip, a display screen module, and an electronic device to at least partially solve the above-mentioned problems.

[0006] According to a first aspect of the present application, a touch chip is provided for use in an electronic device, the electronic device including a plurality of lateral electrodes and a plurality of vertical electrodes, the touch chip including a plurality of first touch pins and a plurality of second touch pins; the first touch pins are used to connect to the lateral electrodes and output one of a mutual capacitance driving signal and a self-capacitance driving signal to the lateral electrodes; the second touch pins are used to connect to the vertical electrodes and output the other of the mutual capacitance driving signal and the self-capacitance driving signal to the vertical electrodes; wherein the signal amplitude and / or frequency of the mutual capacitance driving signal and the self-capacitance driving signal are different.

[0007] In one possible implementation, the amplitude of the mutual capacitance driving signal is greater than the amplitude of the self-capacitance driving signal.

[0008] In one possible implementation, the first touch pin and the second touch pin alternately output the mutual capacitance drive signal and the self-capacitance drive signal to the connected electrodes.

[0009] In one possible implementation, the plurality of lateral electrodes are divided into a plurality of first electrode groups, each first electrode group including at least one lateral electrode, different first electrode groups including different lateral electrodes, and when a first electrode group includes multiple lateral electrodes, the multiple lateral electrodes included in the first electrode group are adjacent; the plurality of lateral electrodes are divided into a plurality of second electrode groups, each second electrode group including at least one lateral electrode, different second electrode groups including different lateral electrodes, and when a second electrode group includes multiple lateral electrodes, the multiple lateral electrodes included in the second electrode group are adjacent; two lateral electrodes that are adjacent to each other and located in different first electrode groups are located in the same second electrode group; in a first driving cycle, the mutual capacitance driving signals received by adjacent first electrode groups are out of phase, and in a second driving cycle, the mutual capacitance driving signals received by adjacent second electrode groups are out of phase.

[0010] In one possible implementation, the plurality of longitudinal electrodes are divided into a plurality of third electrode groups, each third electrode group including at least one longitudinal electrode, different third electrode groups including different longitudinal electrodes, and when a third electrode group includes multiple longitudinal electrodes, the multiple longitudinal electrodes included in the third electrode group are adjacent; the plurality of longitudinal electrodes are divided into a plurality of fourth electrode groups, each fourth electrode group including at least one longitudinal electrode, different fourth electrode groups including different longitudinal electrodes, and when a fourth electrode group includes multiple longitudinal electrodes, the multiple longitudinal electrodes included in the fourth electrode group are adjacent; two longitudinal electrodes that are adjacent to each other and located in different third electrode groups are located in the same fourth electrode group; in a third driving cycle, the mutual capacitance driving signals received by adjacent third electrode groups are out of phase, and in a fourth driving cycle, the mutual capacitance driving signals received by adjacent fourth electrode groups are out of phase.

[0011] In one possible implementation, the mutual capacitance drive signal and the self-capacitance drive signal are out of phase.

[0012] In one possible implementation, the touch chip includes a plurality of recognition units; the plurality of recognition units includes a plurality of first recognition units and a plurality of second recognition units; the first recognition units are connected to the first touch pins, and different first recognition units are connected to different first touch pins; the second recognition units are connected to the second touch pins, and different second recognition units are connected to different second touch pins; the first recognition unit is configured to send one of the mutual capacitance driving signal and the self-capacitance driving signal to the connected first touch pin; the second recognition unit is configured to send the other of the mutual capacitance driving signal and the self-capacitance driving signal to the connected second touch pin.

[0013] In one possible implementation, the identification unit includes a driving subunit and an identification subunit; both the driving subunit and the identification subunit are electrically connected to the first touch pin or the second touch pin; the driving subunit is configured to output the mutual capacitance driving signal or the self-capacitance driving signal to the connected first touch pin or the second touch pin; the identification subunit is configured to receive a sensing signal through the connected first touch pin or the second touch pin, and generate an identification signal based on the sensing signal, and the touch chip performs touch detection based on the identification signal.

[0014] In one possible implementation, the identification subunit includes: a first resistor, an amplifier, a second resistor, and a capacitor; a first end of the first resistor is connected to the first touch pin or the second touch pin, a second end of the first resistor is connected to the negative input terminal of the amplifier, the positive input terminal of the amplifier is connected to a common-mode voltage, a first end of the second resistor is connected to both the negative input terminal of the amplifier and the second end of the first resistor, a second end of the second resistor is connected to the output terminal of the amplifier, a first end of the capacitor is connected to the first end of the second resistor, and a second end of the capacitor is connected to the second end of the second resistor.

[0015] In one possible implementation, the driving subunit includes a first driving subunit and a second driving subunit. The output terminal of the first driving subunit is connected to the positive input terminal of the amplifier, and the output terminal of the second driving subunit is electrically connected to the first touch pin or the second touch pin. The first driving subunit is used to output the self-capacitive driving signal, and the common-mode voltage includes the self-capacitive driving signal output by the first driving subunit. The second driving subunit is used to output the mutual-capacitive driving signal.

[0016] In one possible implementation, the output terminal of the driving subunit is connected to the first terminal of the first resistor.

[0017] In one possible implementation, the identification unit further includes a switch; a first end of the switch is connected to the first touch pin or the second touch pin, and a second end of the switch is connected to the first resistor; the switch is configured to open when the driving subunit outputs the mutual capacitance driving signal to the electrode, thereby disconnecting the first touch pin or the second touch pin from the first resistor, and to close when the driving subunit outputs the self-capacitance driving signal, thereby enabling the identification subunit to receive the sensing signal output by the first touch pin or the second touch pin.

[0018] According to a second aspect of the embodiments of this application, a display screen module is provided, including electrodes and a touch chip as described in the first aspect, wherein the electrodes include a plurality of horizontal electrodes and a plurality of vertical electrodes.

[0019] According to a third aspect of the embodiments of this application, an electronic device is provided, including a display screen module as described in the second aspect.

[0020] According to the touch chip provided in the embodiments of this application, the touch chip includes a first touch pin and a second touch pin. The first touch pin is connected to a horizontal electrode, and the second touch pin is connected to a vertical electrode. The first touch pin outputs either a mutual capacitance driving signal or a self-capacitance driving signal to the horizontal electrode, and the second touch pin outputs either a mutual capacitance driving signal or a self-capacitance driving signal to the vertical electrode. Since the amplitude and / or frequency of the mutual capacitance driving signal and the self-capacitance driving signal are different, a potential difference can be formed between the electrode receiving the mutual capacitance driving signal and the electrode receiving the self-capacitance driving signal. This allows the horizontal electrode and the vertical electrode to perform touch detection through mutual capacitance. When one of the horizontal electrode and the vertical electrode receives the mutual capacitance driving signal, the other receives the self-capacitance driving signal. The electrode receiving the self-capacitance driving signal can perform touch detection through self-capacitance. Thus, when a finger touches the screen, touch detection can be performed by superimposing self-capacitance and mutual capacitance. Compared with the prior art, since touch detection is performed by superimposing self-capacitance and mutual capacitance, the signal change generated by the electrode when the finger touches the screen is larger, which can improve the sensitivity of touch detection. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of a touch chip provided in an embodiment of this application;

[0023] Figure 2 This is a schematic diagram illustrating an identification principle provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of a mutual compatibility driver provided in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of another mutual capacitance drive provided in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram illustrating another identification principle provided in an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of another touch chip provided in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of an identification unit provided in an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of an identification subunit provided in an embodiment of this application;

[0030] Figure 9 This is a schematic diagram of a driving subunit provided in an embodiment of this application;

[0031] Figure 10 This is a schematic diagram of another driving subunit provided in an embodiment of this application;

[0032] Figure 11 This is a schematic diagram of another identification unit provided in an embodiment of this application;

[0033] Figure 12 This is a schematic diagram of another identification unit provided in an embodiment of this application;

[0034] Figure 13 This is a schematic diagram of a display screen module provided in an embodiment of this application;

[0035] Figure 14 This is a schematic diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0037] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0038] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0039] As mentioned earlier, touch technology is a human-computer interaction method. Users interact with electronic devices by touching or gesturing on the touch area. With the development of smart devices, touch technology has become the mainstream operating method for mobile phones and other electronic devices. Mobile phones and other electronic devices receive touch commands input by users on the display screen and recognize the corresponding touch operations based on the touch commands. Currently, electronic device displays use self-capacitive electrodes to recognize the user's touch position on the display screen. However, when using the self-capacitive electrode scheme to recognize the user's touch position, because the electrode's capacitance to ground is relatively high (e.g., 100pF to 1000pF), but the change in capacitance when touched by a finger is only about 0.5pF, the signal strength generated is low, resulting in low recognition sensitivity.

[0040] This application provides a touch chip including a first touch pin and a second touch pin. The first touch pin is connected to a horizontal electrode, and the second touch pin is connected to a vertical electrode. The first touch pin outputs either a mutual capacitance driving signal or a self-capacitance driving signal to the horizontal electrode, and the second touch pin outputs the other of the mutual capacitance driving signal or the self-capacitance driving signal to the vertical electrode. Since the amplitude and / or frequency of the mutual capacitance driving signal and the self-capacitance driving signal are different, a potential difference can be formed between the electrode receiving the mutual capacitance driving signal and the electrode receiving the self-capacitance driving signal. This allows the horizontal and vertical electrodes to perform touch detection through mutual capacitance. When one of the horizontal and vertical electrodes receives the mutual capacitance driving signal, the other receives the self-capacitance driving signal. The electrode receiving the self-capacitance driving signal can perform touch detection through self-capacitance. Therefore, when a finger touches the screen, touch detection can be performed by superimposing self-capacitance and mutual capacitance. Compared with the prior art, since touch detection is performed by superimposing self-capacitance and mutual capacitance, the signal change generated by the electrode during finger touch is larger, which can improve the sensitivity of touch detection.

[0041] Figure 1 This is a schematic diagram of a touch chip provided in an embodiment of this application. The touch chip 100 is used to be installed in an electronic device, such as... Figure 1 As shown, the electronic device includes multiple lateral electrodes 2011 and multiple longitudinal electrodes 2012. Figure 1 The image shows only 6 horizontal electrodes 2011 and 6 vertical electrodes 2012. The touch chip 100 includes a first touch pin 1011 and a second touch pin 1012. The first touch pin 1011 is connected to the horizontal electrode 2011 and outputs one of a mutual capacitance drive signal and a self-capacitance drive signal to the horizontal electrode 2011. The second touch pin 1012 is connected to the vertical electrode 2012 and outputs the other of a mutual capacitance drive signal and a self-capacitance drive signal to the vertical electrode 2012. The mutual capacitance drive signal and the self-capacitance drive signal have different signal amplitudes and / or frequencies.

[0042] The first touch pin 1011 can output one of a mutual capacitance drive signal and a self-capacitance drive signal to the horizontal electrode 2011, while the second touch pin 1012 can output the other of a mutual capacitance drive signal and a self-capacitance drive signal to the vertical electrode 2012. That is, when the first touch pin 1011 outputs a mutual capacitance drive signal, the second touch pin 1012 outputs a self-capacitance drive signal, or when the first touch pin 1011 outputs a self-capacitance drive signal, the second touch pin 1012 outputs a mutual capacitance drive signal. The mutual capacitance drive signal and the self-capacitance drive signal have different signal amplitudes and / or frequencies. The mutual capacitance drive signal and the self-capacitance drive signal can be one of a sine wave signal, a square wave signal, and a trapezoidal wave signal. In one example, the mutual capacitance drive signal and the self-capacitance drive signal can be drive signals with the same waveform shape. In another example, the mutual capacitance drive signal and the self-capacitance drive signal can be drive signals with different waveform shapes.

[0043] It should be understood that when a finger touches the surface, since one of the horizontal electrode 2011 and the vertical electrode 2012 receives a self-capacitive driving signal, the horizontal electrode 2011 or the vertical electrode 2012 receiving the self-capacitive driving signal can perform touch detection through self-capacitance. The other of the horizontal electrode 2011 and the vertical electrode 2012 receives a mutual capacitive driving signal, and the amplitude and / or frequency of the mutual capacitive driving signal are different from those of the self-capacitive driving signal, causing a potential difference between the horizontal electrode 2011 and the vertical electrode 2012. Touch detection can be performed through mutual capacitive recognition between the horizontal electrode 2011 and the vertical electrode 2012. Thus, the touch chip 100 can perform touch detection through the superposition of mutual capacitive and self-capacitive signals. It should also be understood that when the frequencies of the first driving signal and the second driving signal are different, a potential difference is generated between the horizontal electrode 2011 and the vertical electrode 2012 for at least a portion of the time. For example, when the signal amplitudes are the same, and the frequency of the mutual capacitive driving signal is half that of the self-capacitive driving signal, a potential difference can be generated between the mutual capacitive driving signal and the self-capacitive driving signal.

[0044] In this embodiment, the touch chip 100 includes a first touch pin 1011 and a second touch pin 1012. The first touch pin 1011 is connected to a horizontal electrode 2011, and the second touch pin 1012 is connected to a vertical electrode 2012. The first touch pin 1011 outputs either a mutual capacitance driving signal or a self-capacitance driving signal to the horizontal electrode 2011, and the second touch pin 1012 outputs either a mutual capacitance driving signal or a self-capacitance driving signal to the vertical electrode 2012. Since the mutual capacitance driving signal and the self-capacitance driving signal have different signal amplitudes and / or frequencies, the electrode receiving the mutual capacitance driving signal and the electrode receiving the self-capacitance driving signal can be... A potential difference is formed, allowing the lateral electrode 2011 and the vertical electrode 2012 to perform touch detection via mutual capacitance. When one of the lateral electrode 2011 and the vertical electrode 2012 receives a mutual capacitance driving signal, the other receives a self-capacitance driving signal. The electrode receiving the self-capacitance driving signal can then perform touch detection via self-capacitance. Thus, when a finger touches the object, touch detection can be performed using a combination of self-capacitance and mutual capacitance. Compared with existing technologies, the signal change generated by the electrodes during finger touch is larger due to the combination of self-capacitance and mutual capacitance, which can improve the sensitivity of touch detection.

[0045] In one possible implementation, the amplitude of the mutual capacitance drive signal is greater than the amplitude of the self-capacitance drive signal.

[0046] When mutual capacitance identification is used between the transverse electrode 2011 and the longitudinal electrode 2012, the current flows from the high-level electrode to the low-level electrode. Therefore, in order to realize the self-capacitance driving signal identification of the electrode, the signal amplitude of the mutual capacitance driving signal needs to be greater than the signal amplitude of the self-capacitance driving signal, so that the current flows from the electrode receiving the mutual capacitance driving signal to the electrode receiving the self-capacitance driving signal.

[0047] The following explanation uses the example of the first touch pin 1011 outputting a mutual capacitance drive signal to the horizontal electrode 2011, the second touch pin 1012 outputting a self-capacitance drive signal to the vertical electrode 2012, and the mutual capacitance drive signal and the self-capacitance drive signal having the same phase.

[0048] Figure 2 This is a schematic diagram illustrating an identification principle provided in an embodiment of this application, such as... Figure 2 As shown, the first touch pin 1011 outputs a sine wave mutual capacitance drive signal to the horizontal electrode 2011, and the second touch pin 1012 outputs a sine wave self capacitance drive signal to the vertical electrode 2012, as follows. Figure 2The capacitor C33 shown is the mutual capacitance between the third lateral electrode 2011 and the third longitudinal electrode 2012, and CS3 is the capacitance of the third longitudinal electrode 2012 to ground. The lateral electrode 2011 and the longitudinal electrode 2012 are mutually capacitively identified. Because the amplitude of the mutual capacitance driving signal is greater than the amplitude of the self-capacitance driving signal, the current I1 flows as follows... Figure 2 The dashed line shows the current I2 flowing from the first touch pin 1011 to the horizontal electrode 2011, and then through capacitor C33 to the vertical electrode 2012. The vertical electrode 2012 is a self-capacitive sensor, and the current I2 flows as shown in the diagram. Figure 2 The solid line in the diagram shows the flow from the second touch pin 1012 to the vertical electrode 2012 and then to the ground capacitor CS3. When a finger touches the recognition area of ​​the third horizontal electrode 2011 and the third vertical electrode 2012, the capacitance of capacitor C33 decreases and its impedance increases, thus the current I1 decreases. The capacitance of capacitor CS3 increases and its impedance decreases, thus the current I2 increases. Since the currents I1 and I2 are in opposite directions, the current signal received for the second touch pin 1012 increases by the sum of the changes in I1 and I2. The touch chip 100 can perform touch detection based on the signal received from the second touch pin 1012.

[0049] The second touch pin 1012 outputs a mutual capacitance drive signal to the vertical electrode 2012, which is similar in principle to the first touch pin 1011 outputting a mutual capacitance drive signal to the horizontal electrode 2011 in the example above, and will not be described again here.

[0050] In this embodiment, the amplitude of the mutual capacitance driving signal is greater than that of the self-capacitance driving signal. This allows the voltage of the electrode receiving the mutual capacitance driving signal to be greater than that of the electrode receiving the self-capacitance driving signal, causing current to flow from the electrode receiving the mutual capacitance driving signal to the electrode receiving the self-capacitance driving signal. This enables the electrode receiving the self-capacitance driving signal to form a superimposed mutual capacitance and self-capacitance sensing signal. Thus, the touch chip 100 can perform touch detection through the superposition of self-capacitance and mutual capacitance of the electrodes. Because touch detection is performed by superimposing self-capacitance and mutual capacitance, the signal change generated by the electrodes when touched by a finger is larger, which can improve the sensitivity of touch detection.

[0051] In one possible implementation, the first touch pin 1011 and the second touch pin 1012 alternately output mutual capacitance drive signals to the connected electrodes.

[0052] If the first touch pin 1011 outputs a self-capacitive drive signal to the horizontal electrode 2011, and the second touch pin 1012 outputs a mutual capacitive drive signal to the vertical electrode 2012, the horizontal electrode 2011, using the self-capacitive method, can only identify the horizontal coordinate (X-axis coordinate) of the touch position. The vertical electrode 2012 and the horizontal electrode 2011 use a mutual capacitive method, with the vertical electrode 2012 receiving the mutual capacitive drive signal as the transmitting electrode and the horizontal electrode 2011 as the receiving electrode. Since only the horizontal coordinate (X-axis coordinate) of the touch position can be identified, the first touch pin is required. The first touch pin 1011 and the second touch pin 1012 alternately output mutual capacitance driving signals to the connected electrodes. Specifically, the first touch pin 1011 outputs a self-capacitive driving signal to the horizontal electrode 2011, and the second touch pin 1012 outputs a mutual capacitance driving signal to the vertical electrode 2012 to identify the horizontal coordinate X of the touch position. Then, the first touch pin 1011 outputs a mutual capacitance driving signal to the horizontal electrode 2011, and the second touch pin 1012 outputs a self-capacitive driving signal to the vertical electrode 2012 to identify the vertical coordinate Y of the touch position, thereby realizing the identification of the touch position (X,Y).

[0053] In this embodiment, the first touch pin 1011 and the second touch pin 1012 alternately output mutual capacitance driving signals to the connected electrodes, which can identify the horizontal and vertical coordinates of the touch position respectively, thereby realizing touch position recognition. Since the horizontal and vertical coordinates of the touch position are identified separately, the touch position recognition accuracy is higher compared with only the horizontal or vertical coordinate recognition of the touch position. At the same time, while the first touch pin 1011 and the second touch pin 1012 alternately output mutual capacitance driving signals to the connected electrodes, the second touch pin 1012 and the first touch pin 1011 alternately output self-capacitance driving signals to the connected electrodes. Touch detection can be performed by superimposing self-capacitance and mutual capacitance, thereby improving the sensitivity of touch detection.

[0054] In one possible implementation, the plurality of lateral electrodes 2011 are divided into a plurality of first electrode groups 203, each first electrode group 203 including at least one lateral electrode 2011, different first electrode groups 203 including different lateral electrodes 2011, and when a first electrode group 203 includes a plurality of lateral electrodes 2011, the plurality of lateral electrodes 2011 included in the first electrode group 203 are adjacent to each other. The plurality of lateral electrodes 2011 are further divided into a plurality of second electrode groups 204, each second electrode group 204 including at least one lateral electrode 2011, different... The second electrode group 204 includes different lateral electrodes 2011. When the second electrode group 204 includes multiple lateral electrodes 2011, the multiple lateral electrodes 2011 included in the second electrode group 204 are adjacent. Two lateral electrodes 2011 that are adjacent to each other and located in different first electrode groups 203 are located in the same second electrode group 204. In the first driving cycle, the mutual capacitance driving signals received by adjacent first electrode groups 203 are out of phase. In the second driving cycle, the mutual capacitance driving signals received by adjacent second electrode groups 204 are out of phase.

[0055] The following explanation uses the example of six transverse electrodes 2011 being divided into two first electrode groups 203 and six transverse electrodes 2011 being divided into two second electrode groups 204.

[0056] In one example, Figure 3 This is a schematic diagram of a mutual compatibility driver provided in an embodiment of this application. Figure 4 This is a schematic diagram of another mutual capacitance drive provided in an embodiment of this application, such as... Figure 3 As shown, multiple lateral electrodes 2011 are divided into two first electrode groups 203. The first first electrode group 203 includes four lateral electrodes 2011 arranged adjacently, and the second first electrode group 203 includes two lateral electrodes 2011 arranged adjacently. In the first driving cycle, the first first electrode group 203 and the second first electrode group 203, as adjacent first electrode groups, receive mutual capacitance driving signals with opposite phases, for example: Figure 3 The first electrode group 203 shown receives a positive-phase mutual capacitance drive signal, and the second electrode group 203 receives a negative-phase mutual capacitance drive signal. For example... Figure 4 As shown, the first second electrode group 204 includes two lateral electrodes 2011, and the second second electrode group 204 includes four lateral electrodes 2011. In the second driving cycle, the first second electrode group 204 and the second second electrode group 204, as adjacent second electrode groups, receive mutually capacitive driving signals with opposite phases, for example: Figure 4 The first second electrode group 204 shown receives a negative phase mutual capacitance drive signal, and the second second electrode group 204 receives a positive phase mutual capacitance drive signal.

[0057] It should be understood that, such as Figure 3 As shown, since the first driving cycle outputs mutually capacitive driving signals with opposite phases to the adjacent fourth and fifth lateral electrodes 2011, if a finger touches between the fourth and fifth lateral electrodes 2011 at this time, the signals will cancel each other out, resulting in no signal change and making it impossible to recognize the finger's touch position. However, if... Figure 4 As shown, in the second driving cycle, the fourth lateral electrode 2011 and the fifth lateral electrode 2011 are located in the same second electrode group 204. At this time, mutual capacitance driving signals with the same phase are output to the fourth lateral electrode 2011 and the fifth lateral electrode 2011, which can identify the touch position of the finger touching between the fourth lateral electrode 2011 and the fifth lateral electrode 2011. That is, two lateral electrodes 2011 that are adjacent among the multiple lateral electrodes 2011 and located in different first electrode groups 203 are located in the same second electrode group 204.

[0058] It should be noted that in other embodiments, the first touch pin 1011 and the second touch pin 1012 alternately output mutual capacitance drive signals to the connected electrodes. However, in this embodiment, the first touch pin 1011 can output mutual capacitance drive signals to the horizontal electrode 2011 twice. That is, after the first drive cycle and the second drive cycle described above, the second touch pin 1012 outputs mutual capacitance drive signals to the vertical electrode 2012 to prevent the touch coordinates of the finger from being unrecognized when the finger touches two adjacent horizontal electrodes 2011 in multiple horizontal electrodes 2011 and located between two horizontal electrodes 2011 in different first electrode groups 203.

[0059] It should be understood that the above is merely an example for convenience of explanation. In other implementations, the transverse electrode 2011 can be divided into two or more first electrode groups 203 and two or more second electrode groups 204. The number of first electrode groups 203 may not be the same as the number of second electrode groups 204, and in cases such as... Figure 4 In the example, the second driving cycle can output a positive phase mutual capacitance driving signal to the first second electrode group 203 and a negative phase mutual capacitance driving signal to the second second electrode group 204. Therefore, the above example should not impose any limitations on this scheme. The specific grouping rules and mutual capacitance driving signal output rules can be set as needed.

[0060] In this embodiment, the plurality of lateral electrodes 2011 are divided into a plurality of first electrode groups 203 and a plurality of second electrode groups 204. In the first driving cycle, adjacent first electrode groups 203 receive mutual capacitance driving signals with opposite phases. This allows positive-phase mutual capacitance driving signals to be output to some of the lateral electrodes 2011, and negative-phase mutual capacitance driving signals to be output to other lateral electrodes 2011. This causes the mutual capacitance driving signals received by some of the lateral electrodes 2011 to cancel each other out, thereby canceling the signal interference received by some of the lateral electrodes 2011, reducing the signal interference received by the touch chip 100, and improving the dynamic range of touch detection by the touch chip 100. Two adjacent lateral electrodes 2011 located in different first electrode groups 203 are located in the same second electrode group 204. During the second driving cycle, the two adjacent lateral electrodes 2011 located in different first electrode groups 203 receive mutual capacitance driving signals of the same phase. This can prevent the signals between adjacent lateral electrodes 2011 from canceling each other out when adjacent lateral electrodes 2011 receive mutual capacitance driving signals of opposite phase, thus preventing the inability to identify the touch position of the finger touching between the two lateral electrodes 2011. This can improve the dynamic range of touch detection of the touch chip 100 while preventing the inability to identify the touch position of the finger.

[0061] In one possible implementation, a plurality of longitudinal electrodes 2012 are divided into a plurality of third electrode groups, each third electrode group including at least one longitudinal electrode 2012. Different third electrode groups include different longitudinal electrodes 2012. When a third electrode group includes a plurality of longitudinal electrodes 2012, the plurality of longitudinal electrodes 2012 in the third electrode group are adjacent. The plurality of longitudinal electrodes 2012 are divided into a plurality of fourth electrode groups, each fourth electrode group including at least one longitudinal electrode 2012. Different fourth electrode groups include different longitudinal electrodes 2012. When a fourth electrode group includes a plurality of longitudinal electrodes 2012, the plurality of longitudinal electrodes 2012 in the fourth electrode group are adjacent. Two longitudinal electrodes 2012 that are adjacent to each other and located in different third electrode groups are located in the same fourth electrode group. In the third driving cycle, the mutual capacitance driving signals received by adjacent third electrode groups are out of phase. In the fourth driving cycle, the mutual capacitance driving signals received by adjacent fourth electrode groups are out of phase.

[0062] The signal output method of the second touch pin 1012 to the vertical electrode 2012 is similar to the signal output method of the first touch pin 1011 to the horizontal electrode 2011. For a detailed description, please refer to the description of the grouping of the horizontal electrode 2011 and the output of the mutual capacitance drive signal of the first touch pin 1011 in the above embodiment, which will not be repeated here.

[0063] In this embodiment, the multiple vertical electrodes 2012 are divided into multiple third electrode groups and multiple fourth electrode groups. In the first driving cycle, adjacent third electrode groups receive mutual capacitance driving signals with opposite phases. This allows positive-phase mutual capacitance driving signals to be output to some of the vertical electrodes 2012, and negative-phase mutual capacitance driving signals to be output to other parts of the vertical electrodes 2012. This causes the mutual capacitance driving signals received by some of the vertical electrodes 2012 to cancel each other out, thereby canceling the signal interference received by some of the vertical electrodes 2012, reducing the signal interference received by the touch chip 100, and improving the dynamic range of touch detection by the touch chip 100. Furthermore, two adjacent vertical electrodes 2012 located in different third electrode groups are located in the same fourth electrode group. During the second driving cycle, the two adjacent vertical electrodes 2012 located in different third electrode groups receive mutual capacitance driving signals of the same phase. This prevents the signals between adjacent vertical electrodes 2012 from canceling each other out when adjacent vertical electrodes 2012 receive mutual capacitance driving signals of opposite phase, thus preventing the inability to identify the touch position of the finger touching between the two vertical electrodes 2012. This can improve the dynamic range of touch detection performed by the touch chip 100 while preventing the inability to identify the touch position of the finger.

[0064] In one possible implementation, the mutual capacitance drive signal and the self-capacitance drive signal are out of phase.

[0065] The mutual capacitance driving signal and the self-capacitance driving signal can be out of phase. In this case, foreign objects on the display screen, such as water droplets, can be identified by using the horizontal electrode 2011 and the vertical electrode 2012 in a self-capacitance and mutual capacitance manner.

[0066] The following explanation will be based on the example of the first touch pin 1011 outputting a mutual capacitance drive signal to the horizontal electrode 2011, which is a negative phase signal, and the second touch pin 1012 outputting a self-capacitance drive signal to the vertical electrode 2012, which is a positive phase signal.

[0067] Figure 5 This is a schematic diagram illustrating another identification principle provided in an embodiment of this application, such as... Figure 5 As shown, the first touch pin 1011 outputs a sine wave mutual capacitance drive signal to the horizontal electrode 2011, and the second touch pin 1012 outputs a sine wave self-capacitance drive signal to the vertical electrode 2012. The mutual capacitance drive signal and the self-capacitance drive signal are out of phase, as shown. Figure 5The capacitor C33 shown is the mutual capacitance between the third transverse electrode 2011 and the third longitudinal electrode 2012, and CS3 is the capacitance of the third longitudinal electrode 2012 to ground. The transverse electrode 2011 and the longitudinal electrode 2012 are mutually capacitively identified. Since the mutual capacitance driving signal is a negative phase signal and the self-capacitance driving signal is a positive phase signal, the direction of current I3 is as follows... Figure 5 The dashed line shows the current flowing from the second touch pin 1012 to the vertical electrode 2012, and then through capacitor C33 to the horizontal electrode 2011. The vertical electrode 2012 is self-capacitive, and the current I4 flows as shown. Figure 5 The solid line in the diagram shows the flow from the second touch pin 1012 to the vertical electrode 2012, and then to the ground capacitor CS3. When the water droplet is located in the recognition area of ​​the third horizontal electrode 2011 and the third vertical electrode 2012, the capacitance of capacitor C33 decreases, the impedance decreases, and therefore the current I3 increases. The capacitance of capacitor CS3 increases, the impedance decreases, and therefore the current I4 increases. Since the currents I3 and I4 are in the same direction, the current signal received by the second touch pin 1012 increases by the sum of the changes in I3 and I4.

[0068] The second touch pin 1012 outputs a mutual capacitance drive signal to the vertical electrode 2012, which is similar in principle to the first touch pin 1011 outputting a mutual capacitance drive signal to the horizontal electrode 2011 in the example above, and will not be described again here.

[0069] Optionally, the mutual capacitance driving signal can be output according to a set timing sequence. Specifically, taking the output of a mutual capacitance driving signal with the same phase as the self-capacitance driving signal for touch detection as an example, the mutual capacitance driving signal with the same phase as the self-capacitance driving signal can be output n times according to the timing sequence for touch detection, and then a mutual capacitance driving signal with the opposite phase to the self-capacitance driving signal can be output once for foreign object recognition on the display screen. The specific output timing sequence is not limited in this embodiment of the application.

[0070] In this embodiment, the mutual capacitance driving signal and the self-capacitance driving signal are out of phase, thereby enabling the identification of foreign objects such as water droplets located in the touch area, realizing the identification function of foreign objects on the display screen, which can meet different identification needs and has strong functional expandability.

[0071] Figure 6 This is a schematic diagram of another touch chip provided in an embodiment of this application, as shown below. Figure 6As shown, the touch chip 100 includes multiple recognition units 103, each of which includes multiple first recognition units 1031 and multiple second recognition units 1032. The first recognition units 1031 are connected to a first touch pin 1011, with different first recognition units 1031 connected to different first touch pins 1011. The second recognition units 1032 are connected to second touch pins 1012, with different second recognition units 1032 connected to different second touch pins 1012. The first recognition units 1031 are used to send one of a mutual capacitance driving signal and a self-capacitance driving signal to the connected first touch pin 1011. The second recognition units 1032 are used to send the other of a mutual capacitance driving signal and a self-capacitance driving signal to the connected second touch pin 1012.

[0072] The touch chip 100 also includes multiple recognition units 103, including a first recognition unit 1031 and a second recognition unit 1032. The first recognition unit 1031 is connected to the horizontal electrode 2011 via a first touch pin 1011, and the second recognition unit 1032 is connected to the vertical electrode 2012 via a second touch pin 1012. The first recognition unit 1031 can output one of a mutual capacitance driving signal and a self-capacitance driving signal, and the driving signal output by the first recognition unit 1031 is transmitted to the horizontal electrode 2011 via the first touch pin 1011. The second recognition unit 1032 can output the other of a mutual capacitance driving signal and a self-capacitance driving signal, and the driving signal output by the second recognition unit 1032 is transmitted to the vertical electrode 2012 via the second touch pin 1012, thereby realizing the output of mutual capacitance driving signals and self-capacitance driving signals to the electrodes. Optionally, the first recognition unit 1031... When unit 1031 outputs a mutual capacitance driving signal to the horizontal electrode 2011 through the first touch pin 1011, the second recognition unit 1032 outputs a self-capacitance driving signal to the vertical electrode 2012 through the second touch pin 1012, and the second recognition unit 1032 receives the sensing signal generated by the vertical electrode 2012 through the second touch pin 1012. When the first recognition unit 1031 outputs a self-capacitance driving signal to the horizontal electrode 2011 through the first touch pin 1011, the second recognition unit 1032 outputs a mutual capacitance driving signal to the vertical electrode 2012 through the second touch pin 1012, and the first recognition unit 1031 receives the sensing signal generated by the horizontal electrode 2011 through the first touch pin 1011. The first recognition unit 1031 or the second recognition unit 1032 can generate a recognition signal according to the sensing signal, and the touch chip 100 can perform touch detection according to the recognition signal.

[0073] In this embodiment, the touch chip 100 includes multiple recognition units 103, each including multiple first recognition units 1031 and multiple second recognition units 1032. The first recognition unit 1031 can output one of a mutual capacitance driving signal and a self-capacitance driving signal to the horizontal electrode 2011 via a first touch pin 1011. The second recognition unit 1032 can output the other of a mutual capacitance driving signal and a self-capacitance driving signal to the vertical electrode 2012 via a second touch pin 1012. Because the mutual capacitance driving signal and the self-capacitance driving signal have different amplitudes and / or frequencies, the electrode receiving the mutual capacitance driving signal and the electrode receiving the self-capacitance driving signal can be... The electrodes of the signal form a potential difference, allowing the lateral electrode 2011 and the vertical electrode 2012 to perform touch detection through mutual capacitance. When one of the lateral electrode 2011 and the vertical electrode 2012 receives a mutual capacitance driving signal, the other of the lateral electrode 2011 and the vertical electrode 2012 receives a self-capacitance driving signal. The electrode receiving the self-capacitance driving signal can perform touch detection through self-capacitance. Thus, when a finger touches the screen, touch detection can be performed by superimposing self-capacitance and mutual capacitance. Compared with the prior art, the signal strength of the induced signal generated by the electrodes is higher due to the superposition of self-capacitance and mutual capacitance for touch detection, which can improve the sensitivity of touch detection.

[0074] Figure 7 This is a schematic diagram of an identification unit provided in an embodiment of this application, such as... Figure 7 As shown, the identification unit 103 includes a driving subunit 1034 and an identification subunit 1033. Both the driving subunit 1034 and the identification subunit 1033 are electrically connected to the first touch pin 1011 or the second touch pin 1012. The driving subunit 1034 can output a mutual capacitance driving signal or a self-capacitance driving signal to the connected first touch pin 1011 or the second touch pin 1012. The identification subunit 1033 can receive a sensing signal through the connected first touch pin 1011 or the second touch pin 1012 and generate an identification signal based on the sensing signal. The touch chip 100 performs touch detection based on the identification signal.

[0075] The identification unit 103 can be a first identification unit 1031 and a second identification unit 1032. The first identification unit 1031 and the second identification unit 1032 have the same structure, both including a driving subunit 1034 and an identification subunit 1033.

[0076] Optionally, when the driving subunit 1034 in the first identification unit 1031 outputs a mutual capacitance driving signal to the horizontal electrode 2011 through the first touch pin 1011, the driving subunit 1034 in the second identification unit 1032 outputs a self-capacitive driving signal to the vertical electrode 2012 through the second touch pin 1012, and the identification subunit 1033 in the second identification unit 1032 receives the sensing signal generated by the vertical electrode 2012 and generates an identification signal based on the sensing signal. When the driving subunit 1034 in the second identification unit 1032 outputs a mutual capacitance driving signal to the vertical electrode 2012 through the second touch pin 1012, the driving subunit 1034 in the first identification unit 1031 outputs a self-capacitive driving signal to the horizontal electrode 2011 through the first touch pin 1011, and the identification subunit 1033 in the first identification unit 1031 receives the sensing signal generated by the horizontal electrode 2011 and generates an identification signal based on the sensing signal.

[0077] Specifically, if the first touch pin 1011 outputs a self-capacitive drive signal to the horizontal electrode 2011, and the second touch pin 1012 outputs a mutual capacitive drive signal to the vertical electrode 2012, the horizontal electrode 2011, using a self-capacitive method, can only identify the horizontal coordinate (X-axis coordinate) of the touch position. The vertical electrode 2012 and the horizontal electrode 2011 use a mutual capacitive method, with the vertical electrode 2012 receiving the mutual capacitive drive signal as the transmitting electrode and the horizontal electrode 2011 as the receiving electrode. They can only identify the horizontal coordinate (X-axis coordinate) of the touch position. If the second touch pin 1011 outputs a self-capacitive drive signal to the horizontal electrode 2011, and the second touch pin 1012 outputs a mutual capacitive drive signal to the vertical electrode 2012, then the horizontal electrode 2011 can only identify the horizontal coordinate (X-axis coordinate) of the touch position. The control pin 1012 outputs a self-capacitive drive signal to the vertical electrode 2012, and the first touch pin 1011 outputs a mutual capacitive drive signal to the horizontal electrode 2011. The vertical electrode 2012, using a self-capacitive method, can only recognize the vertical coordinate (Y-axis coordinate) of the touch position. The horizontal electrode 2011 and the vertical electrode 2012 use a mutual capacitive method. The horizontal electrode 2011, receiving the mutual capacitive drive signal, acts as the transmitting electrode, and the vertical electrode 2012 acts as the receiving electrode. It can only recognize the vertical coordinate (Y-axis coordinate) of the touch position. As can be seen from the above, when the first recognition unit... When the driving subunit 1034 in 1031 outputs a mutual capacitance driving signal to the horizontal electrode 2011 through the first touch pin 1011, the driving subunit 1034 in the second recognition unit 1032 outputs a self-capacitive driving signal to the vertical electrode 2012 through the second touch pin 1012. The recognition subunit 1033 in the second recognition unit 1032 receives the sensing signal generated by the vertical electrode 2012 and generates a recognition signal based on the sensing signal. The touch chip 100 recognizes the Y-axis coordinate of the touch position based on the recognition signal. When the second recognition unit 103... When the driving subunit 1034 in 2 outputs a mutual capacitance driving signal to the vertical electrode 2012 through the second touch pin 1012, the driving subunit 1034 in the first recognition unit 1031 outputs a self-capacitive driving signal to the horizontal electrode 2011 through the first touch pin 1011, and the recognition subunit 1033 in the first recognition unit 1031 receives the sensing signal generated by the horizontal electrode 2011 and generates a recognition signal according to the sensing signal. The touch chip 100 recognizes the X-axis coordinate of the touch position according to the recognition signal, and realizes the touch position (X,Y) recognition.

[0078] In this embodiment, the identification unit 103 includes a driving subunit 1034 and an identification subunit 1033. Both the driving subunit 1034 and the identification subunit 1033 are electrically connected to the first touch pin 1011 or the second touch pin 1012. The driving subunit 1034 can output a mutual capacitance driving signal or a self-capacitance driving signal to the first touch pin 1011 or the second touch pin 1012. Thus, when a finger touches the screen, the horizontal electrode 2011 or the vertical electrode 2012 can generate a sensing signal. The identification subunit 1033 can generate an identification signal based on the sensing signal. The touch chip 100 Touch detection can be performed based on the recognition signal. Since the driving subunit 1034 in the first recognition unit 1031 outputs one of the mutual capacitance driving signal and the self-capacitance driving signal through the first touch pin 1011, and the driving subunit 1034 in the second recognition unit 1032 outputs the other of the mutual capacitance driving signal and the self-capacitance driving signal through the second touch pin 1012, touch detection is achieved by superimposing the self-capacitance and mutual capacitance. Compared with the prior art, since the touch detection is performed by superimposing the self-capacitance and mutual capacitance, the signal strength of the sensing signal generated by the electrode is higher, which can improve the sensitivity of touch detection.

[0079] Figure 8 This is a schematic diagram of an identification subunit provided in an embodiment of this application, such as... Figure 8 As shown, the identification subunit 1033 includes a first resistor R1, an amplifier D1, a second resistor R2, and a capacitor C1. The first end of the first resistor R1 is connected to the first touch pin 1011 or the second touch pin 1012. The second end of the first resistor R1 is connected to the negative input terminal of the amplifier D1. The positive input terminal of the amplifier D1 is connected to the common-mode voltage VCMI. The first end of the second resistor R2 is connected to both the negative input terminal of the amplifier D1 and the second end of the first resistor R1. The second end of the second resistor R2 is connected to the output terminal of the amplifier D1. The first end of the capacitor C1 is connected to the first end of the second resistor R2. The second end of the capacitor C1 is connected to the second end of the second resistor R2.

[0080] The second resistor R2 can be used as the feedback resistor of amplifier D1. The feedback resistor, capacitor C1 and amplifier D1 can form a transimpedance amplifier circuit. The transimpedance amplifier circuit can convert the sensed signal (current signal) transmitted by the first touch pin 1011 or the second touch pin 1012 into a recognition signal (voltage signal).

[0081] In this embodiment, an amplifier D1, a resistor R2, and a capacitor C1 can be used to form a transimpedance amplifier circuit. The transimpedance amplifier circuit can convert the sensing signal generated by the electrode into a recognition signal. The touch chip 100 can recognize the touch position of the user's finger or foreign objects on the display screen based on the recognition signal, thereby realizing the touch detection function.

[0082] Figure 9 This is a schematic diagram of a driving subunit provided in an embodiment of this application, as shown below. Figure 9 As shown, the driving subunit 1034 includes a self-capacitive driving unit 10341 and a mutual-capacitive driving unit 10342. The output terminal of the self-capacitive driving unit 10341 is connected to the positive input terminal of the amplifier D1, and the output terminal of the mutual-capacitive driving unit 10342 is electrically connected to the first touch pin 1011 or the second touch pin 1012. The self-capacitive driving unit 10341 is used to output a self-capacitive driving signal, and the common-mode voltage VCMI includes the self-capacitive driving signal output by the self-capacitive driving unit 10341. The mutual-capacitive driving unit 10342 is used to output a mutual-capacitive driving signal.

[0083] The self-capacitive drive unit 10341 is electrically connected to either the first touch pin 1011 or the second touch pin 1012 via amplifier D1. The mutual capacitance drive unit 10342 is also electrically connected to either the first touch pin 1011 or the second touch pin 1012. The output terminal of the self-capacitive drive unit 10341 is connected to the positive input terminal of amplifier D1. Since amplifier D1 is a transimpedance amplifier, according to the circuit principle of transimpedance amplifiers, the negative input terminal of amplifier D1 will have the same input level as the positive input terminal. Therefore, when the output terminal of the self-capacitive drive unit 10341 outputs a self-capacitive drive signal to the positive input terminal of amplifier D1, it is equivalent to the negative input terminal of amplifier D1 outputting a self-capacitive drive signal to either the first touch pin 1011 or the second touch pin 1012, thus realizing the output of a self-capacitive drive signal to the electrode. The output terminal of 10341 outputs a self-capacitive drive signal to the positive input terminal of amplifier D1, which can act as the common-mode voltage VCMI input to the positive input terminal of amplifier D1. When a current signal is input to the negative input terminal, a voltage signal can be generated based on the current signal. The mutual capacitance drive unit 10342 can output a mutual capacitance drive signal to the first touch pin 1011 or the second touch pin 1012. In one example, one of the self-capacitive drive unit 10341 and the mutual capacitance drive unit 10342 in the same drive subunit 1034 outputs a drive signal. That is, when the self-capacitive drive unit 10341 outputs a self-capacitive drive signal, the mutual capacitance drive unit 10342 does not output a mutual capacitance drive signal, and when the mutual capacitance drive unit 10342 outputs a mutual capacitance drive signal, the self-capacitive drive unit 10341 does not output a self-capacitive drive signal.

[0084] In this embodiment, the output terminal of the self-capacitive drive unit 10341 is connected to the positive input terminal of amplifier D1. Through the circuit structure of amplifier D1, the self-capacitive drive signal output by the self-capacitive drive unit 10341 can be transmitted to the first touch pin 1011 or the second touch pin 1012 connected to amplifier D1. Furthermore, the self-capacitive drive signal output by the self-capacitive drive unit 10341 can provide a common-mode voltage VCMI to amplifier D1. The output terminal of the mutual capacitance drive unit 10342 is electrically connected to the first touch pin 1011 or the second touch pin 1012, and the mutual capacitance drive unit 10342 can output to the first touch pin 1011 or the second touch pin 1012. The mutual capacitance driving signal allows the driving subunit 1034 to output either a self-capacitance driving signal or a mutual capacitance driving signal to the electrode. Since the driving subunit 1034 in the first identification unit 1031 outputs one of the mutual capacitance driving signal and the self-capacitance driving signal through the first touch pin 1011, and the driving subunit 1034 in the second identification unit 1032 outputs the other of the mutual capacitance driving signal and the self-capacitance driving signal through the second touch pin 1012, touch detection is achieved by superimposing the self-capacitance and mutual capacitance of the electrode. Compared with the prior art, since touch detection is performed by superimposing the self-capacitance and mutual capacitance, the signal strength of the sensing signal generated by the electrode is higher, which can improve the sensitivity of touch detection.

[0085] Figure 10 This is a schematic diagram of another driving subunit provided in an embodiment of this application, as shown below. Figure 10 As shown, the output terminal of the drive subunit 1034 is connected to the first terminal of the first resistor R1.

[0086] In this embodiment, the output terminal of the driving subunit 1034 is connected to the first terminal of the first resistor R1, so that the first touch pin 1011 or the second touch pin 1012 connected to the first terminal of the first resistor R1 can receive the mutual capacitance driving signal or the self-capacitance driving signal output by the driving subunit 1034. Since the driving subunit 1034 in the first identification unit 1031 outputs one of the mutual capacitance driving signal and the self-capacitance driving signal, and the driving subunit 1034 in the second identification unit 1032 outputs the other of the mutual capacitance driving signal and the self-capacitance driving signal, touch detection can be achieved by superimposing the self-capacitance and mutual capacitance of the electrodes. Compared with the prior art, since the touch detection is performed by superimposing the self-capacitance and mutual capacitance, the signal strength of the sensing signal generated by the electrodes is higher, which can improve the sensitivity of touch detection.

[0087] Figure 11 This is a schematic diagram of another identification unit provided in an embodiment of this application. Figure 12 This is a schematic diagram of another identification unit provided in the embodiments of this application, such as... Figure 11 and Figure 12As shown, the identification unit 103 also includes a switch K. The first end of the switch K is connected to the first touch pin 1011 or the second touch pin 1012, and the second end of the switch K is connected to the first resistor R1. The switch K is used to disconnect when the driving subunit 1034 outputs a mutual capacitance driving signal to the first touch pin 1011 or the second touch pin 1012, so that the first touch pin 1011 or the second touch pin 1012 is disconnected from the first resistor R1, and to close when the driving subunit 1034 outputs a self-capacitive driving signal, so that the identification subunit 1033 receives the sensing signal output by the first touch pin 1011 or the second touch pin 1012.

[0088] When the first identification unit 1031 outputs a mutual capacitance driving signal to the lateral electrode 2011, the identification subunit 1033 in the second identification unit 1032 receives the sensing signal generated by the longitudinal electrode 2012 and generates an identification signal based on the sensing signal. Conversely, when the second identification unit 1032 outputs a mutual capacitance driving signal to the longitudinal electrode 2012, the identification subunit 1033 in the first identification unit 1031 receives the sensing signal generated by the lateral electrode 2011 and generates an identification signal based on the sensing signal. Therefore, the driving subunit 1034 ( Figure 11 The mutual capacitance drive unit 10342 in the middle, Figure 12 When the driving subunit 1034 in the identification unit 103 outputs a mutual capacitance driving signal, the identification subunit 1033 may not operate. Figure 11 The self-capacitive drive unit 10341 in the middle, Figure 12 When the driving subunit 1034 outputs a self-capacitive driving signal, the identification subunit 1033 receives the sensing signal. Therefore, the identification unit 103 may include a switch K. When the driving subunit 1034 outputs a self-capacitive driving signal, the switch K is open. At this time, the first touch pin 1011 or the second touch pin 1012 is disconnected from the first resistor R1, and the identification subunit 1033 does not participate in the identification. When the driving subunit 1034 outputs a self-capacitive driving signal, the switch K is closed, and the identification subunit 1033 can receive the sensing signal transmitted by the first touch pin 1011 or the second touch pin 1012.

[0089] It should be noted that when the identification unit 103 includes a switch K, the driving subunit 1034 or the mutual capacitance driving unit 10342 and the touch pin (first touch pin 1011 or second touch pin 1012) are electrically connected to the first end of the switch K, and the second end of the switch K is connected to the first resistor R1. Therefore, when the driving subunit 1034 or the mutual capacitance driving unit 10342 outputs the mutual capacitance driving signal to the first touch pin 1011 or the second touch pin 1012, it will not be affected by the switch K.

[0090] In this embodiment, the identification unit 103 may include a switch K. When the driving subunit 1034 outputs a mutual capacitance driving signal to the first touch pin 1011 or the second touch pin 1012, the switch K is opened to disconnect the first touch pin 1011 or the second touch pin 1012 from the first resistor R1. When the driving subunit 1034 outputs a self-capacitive driving signal, the switch K is closed to allow the identification subunit 1033 to receive the sensing signal transmitted by the first touch pin 1011 or the second touch pin 1012. The switch K can connect the identification subunit 103 to the electrode receiving the mutual capacitance driving signal. 3. It does not participate in touch position recognition. When the first recognition unit 1031 outputs a mutual capacitance driving signal to the horizontal electrode 2011, the recognition subunit 1033 in the second recognition unit 1032 receives the sensing signal generated by the vertical electrode 2012 and generates a recognition signal based on the sensing signal. When the second recognition unit 1032 outputs a mutual capacitance driving signal to the vertical electrode 2012, the recognition subunit 1033 in the first recognition unit 1031 receives the sensing signal generated by the horizontal electrode 2011 and generates a recognition signal based on the sensing signal. This enables the separate detection of the X and Y coordinates of the touch position, resulting in high detection accuracy.

[0091] Figure 13 This is a schematic diagram of a display screen module provided in an embodiment of this application, such as... Figure 13 As shown, the display screen module 200 includes the touch chip 100 and electrodes as described in any of the above embodiments, and the electrodes include multiple horizontal electrodes and multiple vertical electrodes.

[0092] In this embodiment, the touch chip can be the touch chip 100 in any of the above embodiments, the electrode can be the horizontal electrode 2011 or the vertical electrode 2012 in any of the above embodiments, and it can perform the operations in any of the above embodiments and can be the structure in any of the above embodiments, which will not be described again here.

[0093] Figure 14 This is a schematic diagram of an electronic device provided in an embodiment of this application, such as... Figure 14 As shown, the display screen module 200 in the above embodiment of the electronic device 300.

[0094] It should be noted that, depending on the implementation needs, the various components / steps described in the embodiments of this application can be broken down into more components / steps, or two or more components / steps or parts of the operation of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of this application.

[0095] Those skilled in the art will recognize that the units and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this application.

[0096] The above embodiments are only used to illustrate the embodiments of this application, and are not intended to limit the embodiments of this application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of this application. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of this application, and the patent protection scope of the embodiments of this application should be defined by the claims.

Claims

1. A touch chip for use in an electronic device, the electronic device comprising a plurality of lateral electrodes and a plurality of vertical electrodes, characterized in that, The touch chip includes multiple first touch pins and multiple second touch pins; The first touch pin is used to connect to the lateral electrode and output one of a mutual capacitance drive signal and a self-capacitance drive signal to the lateral electrode; The second touch pin is used to connect to the vertical electrode and output the other of the mutual capacitance drive signal and the self-capacitance drive signal to the vertical electrode; The mutual capacitance driving signal has a different amplitude and / or frequency than the self-capacitance driving signal.

2. The touch chip according to claim 1, characterized in that, The amplitude of the mutual capacitance driving signal is greater than the amplitude of the self-capacitance driving signal.

3. The touch chip according to claim 1, characterized in that, The first touch pin and the second touch pin alternately output the mutual capacitance drive signal and the self-capacitance drive signal to the connected electrodes.

4. The touch chip according to claim 1, characterized in that, The plurality of lateral electrodes are divided into a plurality of first electrode groups, each first electrode group including at least one of the lateral electrodes, different first electrode groups including different lateral electrodes, and when a first electrode group includes a plurality of the lateral electrodes, the plurality of lateral electrodes included in the first electrode group are adjacent to each other. The plurality of lateral electrodes are divided into a plurality of second electrode groups, each second electrode group including at least one of the lateral electrodes, different second electrode groups including different lateral electrodes, and when a second electrode group includes a plurality of the lateral electrodes, the plurality of lateral electrodes included in the second electrode group are adjacent to each other. Two of the plurality of lateral electrodes that are adjacent and located in different first electrode groups are located in the same second electrode group; In the first driving cycle, the mutual capacitance driving signals received by adjacent first electrode groups are out of phase, and in the second driving cycle, the mutual capacitance driving signals received by adjacent second electrode groups are out of phase.

5. The touch chip according to claim 1, characterized in that, The plurality of longitudinal electrodes are divided into a plurality of third electrode groups, each third electrode group including at least one of the longitudinal electrodes, different third electrode groups including different longitudinal electrodes, and when a third electrode group includes a plurality of the longitudinal electrodes, the plurality of longitudinal electrodes included in the third electrode group are adjacent to each other. The plurality of longitudinal electrodes are divided into a plurality of fourth electrode groups, each of the fourth electrode groups including at least one of the longitudinal electrodes, different fourth electrode groups including different longitudinal electrodes, and when a fourth electrode group includes a plurality of the longitudinal electrodes, the plurality of longitudinal electrodes included in the fourth electrode group are adjacent to each other. Two of the plurality of longitudinal electrodes that are adjacent and located in different third electrode groups are located in the same fourth electrode group; In the third driving cycle, the mutual capacitance driving signals received by adjacent third electrode groups are out of phase, and in the fourth driving cycle, the mutual capacitance driving signals received by adjacent fourth electrode groups are out of phase.

6. The touch chip according to claim 1, characterized in that, The mutual capacitance driving signal and the self-capacitance driving signal are out of phase.

7. The touch chip according to any one of claims 1-6, characterized in that, The touch chip includes multiple recognition units; The plurality of identification units includes a plurality of first identification units and a plurality of second identification units; The first identification unit is connected to the first touch pin, and different first identification units are connected to different first touch pins; The second identification unit is connected to the second touch pin, and different second identification units are connected to different second touch pins; The first identification unit is configured to send one of the mutual capacitance driving signal and the self-capacitance driving signal to the connected first touch pin; The second identification unit is used to send the other of the mutual capacitance drive signal and the self-capacitance drive signal to the connected second touch pin.

8. The touch chip according to claim 7, characterized in that, The identification unit includes: a driving subunit and an identification subunit; Both the driving subunit and the recognition subunit are electrically connected to the first touch pin or the second touch pin; The driving subunit is used to output the mutual capacitance driving signal or the self-capacitance driving signal to the connected first touch pin or second touch pin; The identification subunit is used to receive a sensing signal through the connected first touch pin or the second touch pin, and generate an identification signal based on the sensing signal. The touch chip performs touch detection based on the identification signal.

9. The touch chip according to claim 8, characterized in that, The identification subunit includes: a first resistor, an amplifier, a second resistor, and a capacitor; The first end of the first resistor is connected to the first touch pin or the second touch pin, the second end of the first resistor is connected to the negative input terminal of the amplifier, the positive input terminal of the amplifier is connected to the common-mode voltage, the first end of the second resistor is connected to both the negative input terminal of the amplifier and the second end of the first resistor, the second end of the second resistor is connected to the output terminal of the amplifier, the first end of the capacitor is connected to the first end of the second resistor, and the second end of the capacitor is connected to the second end of the second resistor.

10. The touch chip according to claim 9, characterized in that, The driving subunit includes a first driving subunit and a second driving subunit. The output terminal of the first driving subunit is connected to the positive input terminal of the amplifier, and the output terminal of the second driving subunit is electrically connected to the first touch pin or the second touch pin. The first driving subunit is used to output the self-capacitive driving signal, and the common-mode voltage includes the self-capacitive driving signal output by the first driving subunit; The second driving subunit is used to output the mutual capacitance driving signal.

11. The touch chip according to claim 9, characterized in that, The output terminal of the driving subunit is connected to the first terminal of the first resistor.

12. The touch chip according to any one of claims 9-11, characterized in that, The identification unit also includes a switch; The first end of the switch is connected to the first touch pin or the second touch pin, and the second end of the switch is connected to the first resistor; The switch is configured to open when the driving subunit outputs the mutual capacitance driving signal to the electrode, thereby disconnecting the first touch pin or the second touch pin from the first resistor, and to close when the driving subunit outputs the self-capacitance driving signal, thereby enabling the identification subunit to receive the sensing signal output by the first touch pin or the second touch pin.

13. A display screen module, characterized in that, It includes electrodes and a touch chip as described in any one of claims 1-12, wherein the electrodes include a plurality of lateral electrodes and a plurality of longitudinal electrodes.

14. An electronic device, characterized in that, Includes the display screen module as described in claim 13.

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