Array substrate, display substrate and electronic equipment

Abstract

The invention provides an array substrate, a display substrate and electronic equipment. The array substrate comprises a TDDI circuit, wherein the TDDI circuit comprises a touch module and a display driving module; the touch control module and the display driving module share a digital analog converter, and the digital analog converter is used for converting a digital touch control signal received by the touch control module into an analog touch control voltage and converting digital pixel data received by the display driving module into an analog pixel voltage. According to the embodiment, the touch module and the display driving module share the digital analog converter of the display driving module, the number of the digital analog converters in the array substrate can be reduced, the area of a TDDI circuit can be reduced, and the size of the array substrate can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of circuit technology, and in particular to an array substrate, a display substrate and an electronic device. Background Art

[0002] Electronic devices are usually provided with a touch function and a display function, and a touch control module of the touch control function and a display driver module of the display function are integrated into one module, such as a TDDI (Touch and Display Driver Integration) chip.

[0003] The touch control module in the existing TDDI chip converts the received digital signal into a sine wave (sine or cosine) to control the touch control circuit. In addition, the display driving module in the existing TDDI chip converts the pixel data into a sine wave to control the pixel circuit.

[0004] Considering that the touch module and display driver module in the TDDI chip need to use a digital-to-analog converter (DAC) when converting digital signals into sine waves, however, the larger area of ​​the DAC will increase the area of ​​the TDDI chip. Summary of the invention

[0005] The present disclosure provides an array substrate, a display substrate and an electronic device to solve the above technical problems.

[0006] According to a first aspect of the present disclosure, an array substrate is provided, the array substrate comprising a TDDI circuit, the TDDI circuit comprising a touch module and a display driver module; the touch module and the display driver module share a digital-to-analog converter, the digital-to-analog converter is used to convert a digital touch signal received by the touch module into an analog touch voltage, and to convert digital pixel data received by the display driver module into an analog pixel voltage.

[0007] Optionally, the touch control module and the display driving module time-share multiplex a digital-to-analog converter.

[0008] Optionally, the touch control module includes a touch control digital circuit and a transmission buffer;

[0009] The input end of the digital-to-analog converter is electrically connected to the output end of the touch digital circuit, and the output end of the digital-to-analog converter is electrically connected to the input end of the sending buffer; the sending buffer is used to output an analog touch voltage.

[0010] Optionally, the display driver module includes a pixel digital circuit and an output buffer;

[0011] The input end of the digital-to-analog converter is electrically connected to the output end of the pixel digital circuit, and the output end of the digital-to-analog converter is electrically connected to the input end of the output buffer; the output buffer is used to output an analog pixel voltage.

[0012] Optionally, the digital-to-analog converter includes a first group of input and output terminals and a second group of input and output terminals;

[0013] The touch control module is electrically connected to an input terminal of the first group of input and output terminals, and an output terminal of the first group of input and output terminals is electrically connected to a sending buffer;

[0014] The display driving module is electrically connected to an input terminal of the second group of input and output terminals, and an output terminal of the second group of input and output terminals is electrically connected to an output buffer.

[0015] Optionally, the digital-to-analog converter comprises a first control unit, a second control unit, a latch, a register and a converter;

[0016] The input end of the latch is electrically connected to the input end of the digital-to-analog converter, the output end of the latch is electrically connected to the input end of the register, and the enable end of the latch is used to receive a first write signal;

[0017] The output end of the register is electrically connected to the input end of the converter, and the enable end of the register is used to receive a second write signal;

[0018] The output end of the converter is electrically connected to the output end of the digital-to-analog converter.

[0019] According to a second aspect of the present disclosure, a display substrate is provided, comprising a controller, an array substrate as described in any one of the first aspects, and a light emitting device disposed on the array substrate;

[0020] The controller is used to receive a digital signal and output a first write signal or a second write signal according to the digital signal, wherein the first write signal is used to write the digital signal into a latch of a digital-to-analog converter on the array substrate, and the second write signal is used to write the digital signal from the latch into the register.

[0021] Optionally, the controller receives a digital signal and outputs a first write signal or a second write signal according to the digital signal, including:

[0022] receiving first digital pixel data and a first write signal in a first sub-period of each control period to write the first digital pixel data into the latch;

[0023] receiving a digital touch signal, a first write signal, and a second write signal in a second sub-period of each control period to write the digital touch signal into the latch and write the first digital pixel data into a register;

[0024] receiving second digital pixel data, a first write signal, and a second write signal in a third sub-period of each control period, so as to write the second digital pixel data into the latch and write the digital touch signal into the register;

[0025] receiving second digital pixel data, a first write signal and a second write signal in a fourth sub-period of each control period to write the second digital pixel data into the latch and write the second digital pixel data signal into the register;

[0026] receiving first digital pixel data, a first write signal and a second write signal in a fifth sub-period of each control period to write the first digital pixel data into the latch and write the second digital pixel data signal into the register;

[0027] A digital touch signal, a first write signal, and a second write signal are received in a sixth sub-period of each control period to write the digital touch data into the latch and write the second digital pixel data signal into the register.

[0028] Optionally, the controller receives a digital signal and outputs a first write signal or a second write signal according to the digital signal, including:

[0029] A digital signal is received, and a first write signal and a second write signal are output; the digital signal includes a digital touch signal and digital pixel data.

[0030] According to a third aspect of the present disclosure, an electronic device is provided, the electronic device comprising the display substrate according to any one of the first aspects and a processor; the processor is electrically connected to the display substrate;

[0031] The processor is used to provide a digital signal to the display substrate;

[0032] The display substrate is used to generate an analog touch voltage to drive a touch circuit according to the digital signal, and to generate an analog pixel voltage to drive a light emitting device.

[0033] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0034] The array substrate provided by the solution of this embodiment includes a TDDI circuit, and the TDDI circuit includes a touch module and a display driver module; the touch module and the display driver module share a digital-to-analog converter, and the digital-to-analog converter is used to convert a digital touch signal received by the touch module into an analog touch voltage, and to convert digital pixel data received by the display driver module into an analog pixel voltage. In this way, the touch module and the display driver module in this embodiment share the digital-to-analog converter of the display driver module, which can reduce the number of digital-to-analog converters in the array substrate, reduce the area of ​​the TDDI circuit, and help reduce the size of the array substrate.

[0035] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The block diagram is a block diagram of an array substrate according to an embodiment of the present disclosure.

[0037] Figure 2 The block diagram is another array substrate according to an embodiment of the present disclosure.

[0038] Figure 3 The block diagram is a further array substrate according to an embodiment of the present disclosure.

[0039] Figure 4 The block diagram is a digital-to-analog converter DAC according to an embodiment of the present disclosure.

[0040] Figure 5 A timing diagram of a TDDI circuit according to an embodiment of the present disclosure.

[0041] Figure 6 A timing diagram of the operation of a digital-to-analog converter DAC according to an embodiment of the present disclosure.

[0042] Figure 7 A timing diagram of another digital-to-analog converter DAC according to an embodiment of the present disclosure.

[0043] Figure 8 The block diagram is another array substrate according to an embodiment of the present disclosure.

[0044] Fig. 9 The present invention is a block diagram of a display substrate according to an embodiment of the present invention.

[0045] Fig.10 The present invention is a block diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0047] The embodiment of the present disclosure provides an array substrate, a display substrate and an electronic device. The electronic device includes a display substrate, and the display substrate includes an array substrate. Figure 1 This embodiment provides an array substrate 10, including: a substrate 11 and a TDDI circuit 12 disposed on the substrate 11. The TDDI circuit 12 includes a touch module 121 and a display driver module 122; the touch module 121 and the display driver module 122 share a digital-to-analog converter DAC, and the digital-to-analog converter DAC is used to convert a digital touch signal received by the touch module 121 into an analog touch voltage, and convert digital pixel data received by the display driver module 122 into an analog pixel voltage.

[0048] It should be noted that the touch control module 121 and the display driver module 122 share the digital analog converter DAC, which may include: (1) time-division multiplexing of the digital analog converter DAC, where time-division multiplexing means that the touch control module 121 and the display driver module 122 use the digital analog converter DAC separately at a certain time; (2) using the digital analog converter DAC simultaneously.

[0049] In one example, see Figure 2 , the touch control module 121 includes a touch control digital circuit 201 and a transmission buffer TxBuffer 202;

[0050] The input end of the digital-to-analog converter DAC is electrically connected to the output end of the touch digital circuit 201, and the output end of the digital-to-analog converter DCA is electrically connected to the input end of the transmission buffer Tx Buffer 202; the transmission buffer 202 is used to output an analog touch voltage. The analog touch voltage can be applied to the touch circuit to perform touch operation detection, wherein the content of the touch operation detection can refer to the relevant technology.

[0051] In one example, see Figure 3 The touch digital circuit 201 may include a first interface circuit 301, a clock Timer, a microprocessor MCU, a memory RAM, a direct memory DMA, and an analog front-end interface circuit 302. The specific structure of the touch digital circuit 201 can be set according to the specific scenario. When the touch digital circuit 201 can provide a digital touch signal, the corresponding solution falls within the protection scope of the present disclosure.

[0052] In one example, continue to see Figure 2 The display driving module 122 includes a pixel digital circuit 203 and an output buffer 204. The input end of the digital-to-analog converter DAC is electrically connected to the output end of the pixel digital circuit 203, and the output end of the digital-to-analog converter DAC is electrically connected to the input end of the output buffer Source output Buffer 204; the output buffer 204 is used to output an analog pixel voltage. The analog pixel voltage can be applied to the light-emitting device to drive the light-emitting device to perform a light-emitting operation, and the content of driving the light-emitting device to emit light can refer to the relevant technology.

[0053] In one example, continue to see Figure 3 The pixel digital circuit 203 may include a second interface circuit 303, a clock controller TCON, a source control Source control, a shift register Shift Register and a latch Latch and other units. The specific composition of the pixel digital circuit 203 can be set according to the specific scenario. When the pixel digital circuit 203 can provide digital pixel data, the corresponding scheme falls within the protection scope of the present disclosure.

[0054] In one example, see Figure 4 , the digital-to-analog converter DAC includes a latch 401, a register 402 and a converter 403. The input end of the latch 401 is electrically connected to the input end of the digital-to-analog converter DAC, the output end of the latch 401 is electrically connected to the input end of the register 402, the enable end of the latch 401 is used to receive a first write signal; the output end of the register 402 is electrically connected to the input end of the converter 403, the enable end of the register 402 is used to receive a second write signal; the output end of the converter 403 is electrically connected to the output end of the digital-to-analog converter DAC.

[0055] It should be noted that, continue to refer to Figure 4 After the input end of the digital-to-analog converter DAC receives the digital signal, and after the latch 401 receives the first write signal, the latch 401 of the digital-to-analog converter DAC can latch the digital signal. After the latch 401 has latched the digital signal, the register 402 can read the digital signal from the latch 401 and determine whether conversion processing is required before outputting it to the converter 403. Figure 2 and Figure 4 After the digital signal is input to the converter 403 , the converter 403 may convert the digital signal into an analog signal and output it to the transmit buffer TxBuffer 202 or the output buffer output buffer 204 .

[0056] When the sending buffer Tx Buffer 202 receives the analog signal, it can be output to the touch circuit for touch operation detection; when the output buffer output buffer 204 receives the analog signal, it can be applied to the light-emitting device to drive the light-emitting device to perform light-emitting operation, that is, the effect of displaying the picture.

[0057] It is understandable that the above-mentioned digital signal includes a digital touch signal and digital pixel data, and the digital-to-analog converter DAC can receive the digital touch signal or the digital pixel data at a certain moment, thereby achieving the effect of time-sharing multiplexing of the digital-to-analog converter DAC by the touch module and the display driver module.

[0058] In one example, digital signals can be output to the touch control module and the display driving module respectively. Figure 5 After the frame synchronization signal Vsync is triggered, the pixel digital circuit of the display driver module can first output digital pixel data S1, and at this time, the blank mode is performed, that is, the display screen will display a black image (or it can be understood as not displaying an image), and the digital pixel data S1 remains unchanged; then, the ROW mode is performed, and the digital pixel data S2 is output, and the level of the digital pixel data S2 is changing, and the display surface is also changing; after that, the digital pixel data S1 is output, and the black mode is performed, and a black image is displayed at this time. The touch control digital circuit of the touch control module can output a digital touch signal with a constant level according to the set frequency.

[0059] Based on the above analysis, this example can be divided into 6 time periods according to the working cycle T of the digital-to-analog converter DAC, namely, the first sub-period t1, the second sub-period t2, the third sub-period t3, the fourth sub-period t4, the fifth sub-period t5 and the sixth sub-period t6. Figure 7 The working process of the digital-to-analog converter DAC in each working cycle includes:

[0060] receiving the first digital pixel data S1 and the first write signal WR1(s) in the first sub-period to write the first digital pixel data S1 into the latch;

[0061] In the second sub-period, a digital touch signal T, a first write signal WR1(t), and a second write signal WR2(s) are received to write the digital touch signal T into the latch and the first digital pixel data S1 into the register;

[0062] In the third sub-period, the second digital pixel data S2, the first write signal WR1(s) and the second write signal WR2(t) are received to write the second digital pixel data S2 into the latch and write the digital touch signal T into the register;

[0063] In a fourth sub-period, receiving second digital pixel data S2, a first write signal WR1(s), and a second write signal WR2(s) to write the second digital pixel data S2 into a latch and write the second digital pixel data signal S2 into a register;

[0064] In the fifth sub-period, the first digital pixel data S1, the first write signal WR1(s) and the second write signal WR2(s) are received to write the first digital pixel data S1 into the latch and write the second digital pixel data S2 into the register;

[0065] In the sixth sub-period, the digital touch signal T, the first write signal WR1(t) and the second write signal WR2(s) are received to write the digital touch data T into the latch and write the second digital pixel data signal S1 into the register.

[0066] It should be noted that Figure 6 Here, S1, S2 and T represent digital signals, while S1', S2' and T' represent analog signals.

[0067] It should also be noted that the write mark (s) after the first write signal WR1 indicates that the first write signal WR1 is used to write digital pixel data S1 or S2 to the latch; the write mark (t) after the first write signal WR1 indicates that the first write signal WR1 is used to write digital touch data T to the latch. The write mark (s) after the second write signal WR2 indicates that the second write signal WR2 is used to write digital pixel data S1 or S2 to the register; the write mark (t) after the second write signal WR2 indicates that the second write signal WR2 is used to write digital touch data T to the register.

[0068] It should also be noted that the above examples describe the situation where digital touch data is input at a fixed frequency. In some possible examples, digital touch data can also be output in a variable frequency manner to achieve the effect of improving control accuracy.

[0069] In one example, the input terminal 701 and the output terminal 702 of the digital-to-analog converter DAC can be implemented with 8 bits, 16 bits or more bits. For example, the input terminal 701 and the output terminal 702 are implemented with 8 bits respectively. Figure 8 The digital-to-analog converter DAC includes: a first group of input-output terminals D0-D1 and a second group of input-output terminals D2-D7. The touch control module is electrically connected to the input terminals of the first group of input-output terminals D0-D1, and the output terminals of the first group of input-output terminals D0-D1 are electrically connected to the transmission buffer Tx Buffer; the display driving module is electrically connected to the input terminals of the second group of input-output terminals D2-D7, and the output terminals of the second group of input-output terminals D2-D7 are electrically connected to the output buffer Output Buffer.

[0070] Continue to see Figure 8 , the working process of the digital-to-analog converter DAC in this example includes:

[0071] The digital touch signal and the digital pixel data can be inputted at the same time, and written into the latch 401, the register 402 and the converter 403 at the same time, and finally written into the transmission buffer TxBuffer and the output buffer Output Buffer through their respective output terminals.

[0072] It should be noted that the first write signal WR1 and the second write signal WR2 of the digital-to-analog converter DAC in this example can be controlled by the clock controller TCON of the pixel digital circuit 203. In one example, the clock controller TCON can control the frequency of the digital pixel data to control the input of the digital signal, and output the digital touch signal according to the refresh frequency of the pixel data (for example, the fifth sub-cycle t5 stage of the above example), and there is no need to change the control timing of the existing clock controller TCON in this example. In another example, the clock controller TCON can control the frequency of the digital pixel data to control the input of the digital signal, and output the digital touch signal in a frequency conversion manner (for example, the second sub-cycle t2 and the fifth sub-cycle t5 stage of the above example) to ensure the control accuracy of the touch circuit.

[0073] Based on an array substrate provided in an embodiment of the present disclosure, an embodiment of the present disclosure further provides a display substrate, see Fig. 9 , including a controller 901, the above-mentioned array substrate and a light-emitting device OLED arranged on the array substrate; the controller is used to receive a digital signal and output a first write signal or a second write signal according to the digital signal, the first write signal is used to write the digital signal into the latch of the digital-to-analog converter on the array substrate, and the second write signal is used to write the digital signal from the latch into the register.

[0074] It should be noted that the display substrate can be provided with a separate controller, which can be implemented by a microprocessor, a single-chip microcomputer, a digital information processing chip, etc. A clock controller TCON can also be used as the controller 901. Those skilled in the art can select a corresponding implementation method according to a specific scenario, and the corresponding solution falls within the protection scope of the present disclosure.

[0075] In some possible examples, the controller receives a digital signal and outputs a first write signal or a second write signal according to the digital signal, including:

[0076] receiving first digital pixel data and a first write signal in a first sub-period of each control period to write the first digital pixel data into the latch;

[0077] receiving a digital touch signal, a first write signal, and a second write signal in a second sub-period of each control period to write the digital touch signal into the latch and write the first digital pixel data into a register;

[0078] receiving second digital pixel data, a first write signal, and a second write signal in a third sub-period of each control period, so as to write the second digital pixel data into the latch and write the digital touch signal into the register;

[0079] receiving second digital pixel data, a first write signal and a second write signal in a fourth sub-period of each control period to write the second digital pixel data into the latch and write the second digital pixel data signal into the register;

[0080] receiving first digital pixel data, a first write signal and a second write signal in a fifth sub-period of each control period to write the first digital pixel data into the latch and write the second digital pixel data signal into the register;

[0081] A digital touch signal, a first write signal, and a second write signal are received in a sixth sub-period of each control period to write the digital touch data into the latch and write the second digital pixel data signal into the register.

[0082] In this example, the working process of the controller controlling the digital-to-analog converter DAC can refer to the embodiment of the clock controller TCON, which will not be described in detail here.

[0083] In some possible examples, the controller receives a digital signal and outputs a first write signal or a second write signal according to the digital signal, including: receiving a digital signal, outputting a first write signal and a second write signal; the digital signal includes a digital touch signal and digital pixel data.

[0084] It should be noted that the display substrate provided in the embodiment of the present disclosure is based on the addition of a controller and a light-emitting device compared to the array substrate. Based on the controller outputting digital signals and the light-emitting device and the touch circuit receiving analog signals, other contents may refer to the relevant contents of the array substrate.

[0085] Based on a display substrate provided in an embodiment of the present disclosure, an electronic device is also provided in an embodiment of the present disclosure, see Fig.10, including the above-mentioned display substrate and a processor 1001; the processor 1001 is electrically connected to the display substrate; the processor 1001 is used to provide a digital signal to the display substrate; the display substrate is used to generate an analog touch voltage to drive the touch circuit according to the above-mentioned digital signal, and to generate an analog pixel voltage to drive the light-emitting device. It should be noted that in this example, the processor 1001 can send a digital signal to the display substrate. After the display substrate receives the digital signal, the controller of the display substrate will process the digital signal, and generate a first write signal and a second write signal according to the preset touch timing and display timing, so as to control the digital signal to be input to the digital-to-analog converter DAC to obtain an analog signal. Finally, the analog signal is used to drive the touch circuit or the light-emitting device.

[0086] The array substrate, display substrate and electronic device provided in this embodiment have the following advantages, including: (1) the electromagnetic performance and touch performance of the substrate can be improved; (2) the area of ​​the TDDI circuit is reduced, the cost of the TDDI circuit is reduced, and the integration of TDDI is improved; (3) the digital-to-analog converter DAC is shared, the conversion stage of the digital signal is reasonably allocated, and the DAC power consumption can be reduced; (4) the solution is applicable to all TDDI solutions of different display solutions such as OLED, LCD, Micro LED, etc.; (5) it is applicable to TDDI solutions for application scenarios such as wearable devices, mobile terminals, laptops and smart cars.

[0087] The terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit the disclosure. Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by people with ordinary skills in the field to which the disclosure belongs. Similar words such as "one" or "one" used in this disclosure specification and claims do not indicate a quantitative limitation, but indicate that there is at least one. "Multiple" means at least two. Similar words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms of "one", "said" and "the" used in this disclosure specification and the attached claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0088] As for the method embodiment, since it basically corresponds to the device embodiment, the relevant parts can be referred to the partial description of the device embodiment. The method embodiment and the device embodiment complement each other.

[0089] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. An array substrate, characterized in that: The array substrate includes a TDDI circuit, and the TDDI circuit includes a touch module and a display driver module; the touch module and the display driver module share a digital-to-analog converter, and the digital-to-analog converter is used to convert a digital touch signal received by the touch module into an analog touch voltage, and to convert digital pixel data received by the display driver module into an analog pixel voltage.

2. The array substrate according to claim 1, characterized in that: The touch control module and the display driving module time-share multiplex digital-to-analog converters.

3. The array substrate according to claim 2, characterized in that: The touch control module includes a touch control digital circuit and a transmission buffer; The input end of the digital-to-analog converter is electrically connected to the output end of the touch digital circuit, and the output end of the digital-to-analog converter is electrically connected to the input end of the sending buffer; the sending buffer is used to output an analog touch voltage.

4. The array substrate according to claim 1, characterized in that: The display driving module includes a pixel digital circuit and an output buffer; The input end of the digital-to-analog converter is electrically connected to the output end of the pixel digital circuit, and the output end of the digital-to-analog converter is electrically connected to the input end of the output buffer; the output buffer is used to output an analog pixel voltage.

5. The array substrate according to claim 1, characterized in that: The digital-to-analog converter comprises a first group of input and output terminals and a second group of input and output terminals; The touch control module is electrically connected to an input terminal of the first group of input and output terminals, and an output terminal of the first group of input and output terminals is electrically connected to a sending buffer; The display driving module is electrically connected to an input terminal of the second group of input and output terminals, and an output terminal of the second group of input and output terminals is electrically connected to an output buffer.

6. The array substrate according to any one of claims 1 to 5, characterized in that: The digital-to-analog converter includes a latch, a register and a converter; The input end of the latch is electrically connected to the input end of the digital-to-analog converter, the output end of the latch is electrically connected to the input end of the register, and the enable end of the latch is used to receive a first write signal; The output end of the register is electrically connected to the input end of the converter, and the enable end of the register is used to receive a second write signal; The output end of the converter is electrically connected to the output end of the digital-to-analog converter.

7. A display substrate, characterized in that: It comprises a controller, an array substrate according to any one of claims 1 to 6, and a light emitting device arranged on the array substrate; The controller is used to receive a digital signal and output a first write signal or a second write signal according to the digital signal, wherein the first write signal is used to write the digital signal into a latch of a digital-to-analog converter on the array substrate, and the second write signal is used to write the digital signal from the latch into the register.

8. The display substrate according to claim 7, characterized in that: The controller receives a digital signal and outputs a first write signal or a second write signal according to the digital signal, including: receiving first digital pixel data and a first write signal in a first sub-period of each control period to write the first digital pixel data into the latch; receiving a digital touch signal, a first write signal, and a second write signal in a second sub-period of each control period to write the digital touch signal into the latch and write the first digital pixel data into a register; receiving second digital pixel data, a first write signal, and a second write signal in a third sub-period of each control period, so as to write the second digital pixel data into the latch and write the digital touch signal into the register; receiving second digital pixel data, a first write signal and a second write signal in a fourth sub-period of each control period to write the second digital pixel data into the latch and write the second digital pixel data signal into the register; receiving first digital pixel data, a first write signal and a second write signal in a fifth sub-period of each control period to write the first digital pixel data into the latch and write the second digital pixel data signal into the register; A digital touch signal, a first write signal, and a second write signal are received in a sixth sub-period of each control period to write the digital touch data into the latch and write the second digital pixel data signal into the register.

9. The display substrate according to claim 7, characterized in that: The controller receives a digital signal and outputs a first write signal or a second write signal according to the digital signal, including: A digital signal is received, and a first write signal and a second write signal are output; the digital signal includes a digital touch signal and digital pixel data.

10. An electronic device, characterized in that: The electronic device comprises a display substrate as claimed in any one of claims 7 to 9 and a processor; the processor is electrically connected to the display substrate; The processor is used to provide a digital signal to the display substrate; The display substrate is used to generate an analog touch voltage to drive a touch circuit according to the digital signal, and to generate an analog pixel voltage to drive a light emitting device.

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