Data driving circuit, driving module and display device

Abstract

This application belongs to the field of displays, and particularly relates to a data driving circuit, a driving module, and a display device. The data driving circuit includes a data processing unit, a first buffer, a touch signal acquisition unit, and a touch signal processing unit. The first buffer is used to convert a data signal into a data voltage and output it to a data line. The touch signal acquisition unit includes a second buffer and a differential amplifier. The second buffer is connected to the output end of the first buffer. The first input end of the differential amplifier is connected to the output end of the first buffer. The second input end of the differential amplifier is connected to the output end of the second buffer. The output end of the differential amplifier is connected to the touch signal processing unit. The touch signal acquisition unit and the first buffer are connected to the same data line. The touch signal acquisition unit acquires touch signals during the interval when the first buffer outputs the data voltage, which can avoid touch detection from occupying the pixel charging time and improve the display effect of the display panel.

Description

Technical Field

[0001] This application belongs to the field of displays, and particularly relates to a data driving circuit, a driving module, and a display device. Background Art

[0002] Thin Film Transistor Liquid Crystal Displays (TFT-LCDs) are widely used in various consumer electronic products such as mobile phones, TVs, and laptop computers due to their advantages of high picture quality, power saving, thin body, and mature and stable manufacturing processes. With the development of display technology, the touch function has gradually become a priority consideration for consumers when purchasing electronic products.

[0003] A liquid crystal display includes pixel units arranged in an array. After a scan driving circuit provides a scan driving signal on a corresponding scan line, all transistors connected to the scan line are switched to the on state, so that each pixel on this scan line receives a display signal from its respective connected data line and controls the deflection degree of the liquid crystal in different pixels according to the display signal, thereby realizing the display of one row of pixels.

[0004] In existing liquid crystal displays, touch detection is performed multiple times during the period of displaying one frame of the picture. The touch detection will occupy the pixel charging time, and insufficient pixel charging may cause problems such as uneven brightness, ghosting, and reduced contrast, affecting the display effect of the liquid crystal display. Summary of the Invention

[0005] The purpose of this application is to provide a data driving circuit, a driving module, and a display device to avoid the touch detection from occupying the pixel charging time and improve the display effect of the liquid crystal display.

[0006] To achieve the above purpose, this application provides a display panel, including a data processing unit and a plurality of first buffers. The first buffers are connected to the data processing unit. The data processing unit can output data signals, and the first buffers are used to convert the data signals into data voltages and output them to the data lines. The data driving circuit further includes:

[0007] A touch signal acquisition unit. The touch signal acquisition unit is connected to the first buffers in a one-to-one correspondence. The touch signal acquisition unit includes a second buffer and a differential amplifier. The second buffer is connected to the output end of the first buffer. The first input end of the differential amplifier is connected to the output end of the first buffer, and the second input end of the differential amplifier is connected to the output end of the second buffer;

[0008] A touch signal processing unit is connected to the output terminal of the differential amplifier. The touch signal processing unit is used to output a touch signal, and the touch signal processing unit at least includes a digital-to-analog conversion circuit.

[0009] Optionally, the touch signal acquisition unit further includes an isolation device. The isolation device is connected to the first input terminal of the differential amplifier and the output terminal of the first buffer. The connection from the output terminal of the first buffer to the first input terminal of the differential amplifier is unidirectionally conductive through the isolation device.

[0010] Optionally, the isolation device includes a diode. The anode of the diode is connected to the output terminal of the first buffer, and the cathode of the diode is connected to the first input terminal of the differential amplifier.

[0011] Optionally, the second buffer includes an enable control terminal. The touch signal acquisition unit further includes an enable controller. The enable controller is connected to the enable control terminal. When the enable controller outputs a second control signal, the second buffer forms a high-impedance state for the output terminal of the first buffer. When the enable controller outputs a first control signal, the touch voltage at the output terminal of the first buffer can be written into the differential amplifier through the second input terminal of the differential amplifier.

[0012] Optionally, the differential amplifier includes an enable control terminal. When the enable controller outputs a second control signal, the differential amplifier forms a high-impedance state for the output terminal of the first buffer. When the enable controller outputs a first control signal, the touch voltage at the output terminal of the first buffer can be written into the differential amplifier through the first input terminal of the differential amplifier.

[0013] Optionally, the enable controller is connected to the enable control terminal and the data processing unit. The data processing unit controls the enable controller to output a first control signal or a second control signal.

[0014] Optionally, the first buffer includes a control output terminal. When the first buffer outputs a data voltage, the control output terminal outputs a first control signal. When the first buffer stops outputting the data voltage, the control output terminal outputs a second control signal. The first control signal is a high-level signal, and the second control signal is a low-level signal. The enable controller includes an inverter, and the inverter is connected to the control output terminal and the enable control terminal.

[0015] This application further provides a driving module, including:

[0016] The data driving circuit;

[0017] A timing controller, which is connected to the data driving circuit.

[0018] The present application further provides a display device, including:

[0019] The driving module;

[0020] A display panel, connected to the driving module.

[0021] Optionally, the display panel includes a touch layer, an array substrate, a liquid crystal layer, and a counter substrate. The liquid crystal layer is disposed between the array substrate and the counter substrate. On a side of the array substrate close to the liquid crystal layer, there are provided multiple rows of scan lines, multiple columns of data lines, multiple thin film transistors, and multiple pixel electrodes. The thin film transistors correspond one by one to the intersections of the scan lines and the data lines. The control ends of the thin film transistors are connected to the scan lines of their respective rows. The first ends of the thin film transistors are connected to the data lines of their respective columns. The second ends of the thin film transistors are connected to the pixel electrodes. The thin film transistors are photosensitive devices;

[0022] The touch layer is disposed on a side of the array substrate away from the counter substrate. The touch layer includes multiple touch parts. The positions of the touch parts correspond to the positions of at least one of the thin film transistors. The light intensity for irradiating the thin film transistors through the touch parts is different in touch and non-touch states.

[0023] The data driving circuit, driving module, and display device disclosed in the present application have the following beneficial effects:

[0024] In the present application, the data driving circuit includes a data processing unit, a first buffer, a touch signal acquisition unit, and a touch signal processing unit. Multiple first buffers are connected to the data processing unit. The first buffers are used to convert data signals into data voltages and output them to the data lines. The touch signal acquisition units are connected to the first buffers one by one. The touch signal acquisition unit includes a second buffer and a differential amplifier. The second buffer is connected to the output end of the first buffer. The first input end of the differential amplifier is connected to the output end of the first buffer. The second input end of the differential amplifier is connected to the output end of the second buffer. The output end of the differential amplifier is connected to the touch signal processing unit. The touch signal acquisition unit is connected to the output end of the first buffer, that is, the touch signal acquisition unit and the first buffer are connected to the same data line. The touch signal acquisition unit acquires touch signals during the interval when the first buffer outputs data voltages, which can avoid touch detection from occupying the pixel charging time and improve the display effect of the display panel.

[0025] Other features and advantages of the present application will become apparent through the following detailed description, or will be partially learned through the practice of the present application.

[0026] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the present disclosure. Description of the Drawings

[0027] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic structural diagram of a display panel in Embodiment 1 of the present application.

[0029] Figure 2 It is a schematic structural diagram of an array substrate in Embodiment 1 of the present application.

[0030] Figure 3 It is a schematic structural diagram of a data driving circuit in Embodiment 1 of the present application.

[0031] Figure 4 It is a schematic structural diagram of a touch signal acquisition unit in Embodiment 1 of the present application.

[0032] Figure 5 It is a schematic diagram of the data voltage output by the data driving circuit in Embodiment 1 of the present application.

[0033] Figure 6 It is a schematic diagram of the data driving circuit collecting touch signals in Embodiment 1 of the present application.

[0034] Figure 7 It is a schematic structural diagram of a driving module in Embodiment 2 of the present application.

[0035] Figure 8 It is a schematic structural diagram of a display device in Embodiment 3 of the present application.

[0036] Figure 9 It is a schematic structural diagram of a pixel driving circuit in Embodiment 3 of the present application.

[0037] Description of the Reference Numerals:

[0038] 10. Display panel; 100. Touch layer; 101. Touch part; 200. Array substrate; 201. Scan line; 202. Data line; 203. Thin film transistor; 204. Pixel electrode; 300. Liquid crystal layer; 400. Opposite substrate;

[0039] 20. Driving module; 500. Data driving circuit; 510. Data processing unit; 520. First buffer; 521. Control output terminal; 530. Touch signal acquisition unit; 531. Second buffer; 532. Differential amplifier; 533. Isolation device; 534. Enable controller; 540. Touch signal processing unit; 600. Timing controller; 700. Scanning driving circuit. Detailed implementation manners

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art.

[0041] In addition, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of this application. However, those skilled in the art will realize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be employed. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of this application.

[0042] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted here that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0043] Embodiment 1

[0044] Referring to Figure 1 and Figure 2 As shown, the display panel 10 includes a touch layer 100, an array substrate 200, a liquid crystal layer 300, and a counter substrate 400. The liquid crystal layer 300 is disposed between the array substrate 200 and the counter substrate 400, and the counter substrate 400 includes a color filter substrate. A plurality of scan lines 201, a plurality of data lines 202, and a plurality of photosensitive devices are disposed on one side of the array substrate 200 close to the liquid crystal layer 300. The photosensitive devices are thin film transistors 203, and the thin film transistors 203 correspond one by one to the intersections of the scan lines 201 and the data lines 202. The control terminal of the thin film transistor 203 is connected to the scan line 201 of the corresponding row, and the first terminal of the thin film transistor 203 is connected to the data line 202 of the corresponding column.

[0045] The touch control layer 100 is disposed on a side of the array substrate 200 away from the counter substrate 400. The touch control layer 100 includes a plurality of touch control parts 101, and the positions of the touch control parts 101 correspond to the positions of at least one thin film transistor 203. That is to say, one touch control part 101 can be correspondingly disposed above each thin film transistor 203, or one touch control part 101 can be correspondingly disposed above a plurality of thin film transistors 203. In touch and non-touch states, the light intensity of the light irradiated on the thin film transistor 203 through the touch control part 101 is different.

[0046] For example, a light source is disposed on a side of the touch control layer 100. When the touch control part 101 is not under a touch pressure, light undergoes total internal reflection within the touch control part 101, and no light irradiates the thin film transistor 203 corresponding to the touch control part 101. The touch control voltage of the current signal flowing into the data line 202 through the thin film transistor 203 is V1; when the touch control part 101 is under a touch pressure, the touch control part 101 undergoes elastic deformation, light refracts within the touch control part 101 and irradiates the thin film transistor 203, and the touch control voltage of the current signal flowing into the data line 202 through the thin film transistor 203 is V2. By detecting the change in the touch control voltage, the touched area of the display panel 10 can be detected, that is, the touch control function is realized.

[0047] The scan lines 201 of the display panel 10 are connected to the scan driving circuit 700, and the data lines 202 of the display panel 10 are connected to the data driving circuit 500. After the scan driving circuit 700 provides a scan driving signal on the corresponding scan line 201, all the transistors connected to the scan line 201 are switched to an on state, so that each pixel on this scan line 201 respectively receives a display signal (i.e., a data voltage) from its respective connected data line 202, and controls the deflection degree of the liquid crystal in different pixels according to the display signal, thereby realizing the display of a row of pixels. By controlling the transistors to be turned on row by row and writing the data voltage row by row, the display of a frame of picture can be realized.

[0048] See Figure 3 and Figure 4 As shown, the data driving circuit 500 includes a data processing unit 510, a first buffer 520, a touch control signal acquisition unit 530, and a touch control signal processing unit 540. A plurality of first buffers 520 are connected to the data processing unit 510. The data processing unit 510 can output a data signal, and the first buffer 520 is used to convert the data signal into a data voltage and output it to the data line 202. The data signal is a digital signal, and the data voltage is an analog signal.

[0049] The touch signal acquisition unit 530 is connected to the first buffer 520 in a one-to-one correspondence. The touch signal acquisition unit 530 includes a second buffer 531 and a differential amplifier 532. The second buffer 531 is connected to the output terminal of the first buffer 520. The first input terminal of the differential amplifier 532 is connected to the output terminal of the first buffer 520. The second input terminal of the differential amplifier 532 is connected to the output terminal of the second buffer 531. The output terminal of the differential amplifier 532 is connected to the touch signal processing unit 540.

[0050] The touch signal processing unit 540 is used to output touch signals. The touch signal processing unit 540 at least includes a digital-to-analog conversion circuit. The output signal of the differential amplifier 532 is an analog signal, and the touch signal processing unit 540 can convert the analog signal into a digital signal. In addition, the touch signal processing unit 540 can also output touch position information according to the scanning time.

[0051] In the design of some liquid crystal displays, multiple touch detections are performed within the time period of displaying one frame of the picture. The touch detection will occupy the pixel charging time, and insufficient pixel charging may cause problems such as uneven brightness, ghosting, and reduced contrast, affecting the display effect of the liquid crystal display.

[0052] In this embodiment, the data driving circuit 500 includes a data processing unit 510, a first buffer 520, a touch signal acquisition unit 530, and a touch signal processing unit 540. Multiple first buffers 520 are connected to the data processing unit 510. The first buffer 520 is used to convert the data signal into a data voltage and output it to the data line 202. The touch signal acquisition unit 530 is connected to the first buffer 520 in a one-to-one correspondence. The touch signal acquisition unit 530 includes a second buffer 531 and a differential amplifier 532. The second buffer 531 is connected to the output terminal of the first buffer 520. The first input terminal of the differential amplifier 532 is connected to the output terminal of the first buffer 520. The second input terminal of the differential amplifier 532 is connected to the output terminal of the second buffer 531. The output terminal of the differential amplifier 532 is connected to the touch signal processing unit 540. The touch signal acquisition unit 530 is connected to the output terminal of the first buffer 520, that is, the touch signal acquisition unit 530 and the first buffer 520 are connected to the same data line 202. The touch signal acquisition unit 530 acquires touch signals during the gap when the first buffer 520 outputs the data voltage, which can avoid the touch detection from occupying the pixel charging time and improve the display effect of the display panel 10.

[0053] In some embodiments, the touch signal acquisition unit 530 further includes an isolation device 533. The isolation device 533 is connected to the first input terminal of the differential amplifier 532 and the output terminal of the first buffer 520. The connection from the output terminal of the first buffer 520 to the first input terminal of the differential amplifier 532 is unidirectionally conductive through the isolation device 533.

[0054] An isolation device 533 is disposed between the first input terminal of the differential amplifier 532 and the output terminal of the first buffer 520, which can reduce or eliminate the influence of the differential amplifier 532 on the data voltage and improve the display effect of the display panel 10.

[0055] In some embodiments, the isolation device 533 includes a diode. The anode of the diode is connected to the output terminal of the first buffer 520, and the cathode of the diode is connected to the first input terminal of the differential amplifier 532. The isolation device 533 can be a diode, but is not limited thereto. The isolation device 533 can also use a field effect transistor, which can be determined according to the specific situation.

[0056] The isolation device 533 includes a diode. The diode has a simple structure and does not require voltage control, which is beneficial to reducing the manufacturing cost of the data driving circuit 500.

[0057] In some embodiments, the second buffer 531 includes an enable control terminal. The touch signal acquisition unit 530 further includes an enable controller 534, and the enable controller 534 is connected to the enable control terminal. When the enable controller 534 outputs a second control signal, the second buffer 531 forms a high impedance state with respect to the output terminal of the first buffer 520, that is, the second buffer 531 forms a high impedance state with respect to the data line 202. When the enable controller 534 outputs a first control signal, the touch voltage at the output terminal of the first buffer 520 can be written into the differential amplifier 532 through the second input terminal of the differential amplifier 532. The first control signal can be a high level signal, and the second control signal can be a low level signal. In addition, the differential amplifier 532 can also include an enable control terminal, and the enable control terminal of the differential amplifier 532 is also connected to the enable controller 534.

[0058] The enable controller 534 controls the first buffer 520 to form a high impedance state with respect to the data line 202, which can reduce or eliminate the influence of the first buffer 520 on the data voltage and improve the display effect of the display panel 10.

[0059] In some embodiments, the first buffer 520 includes a control output terminal 521. When the first buffer 520 outputs a data voltage, the control output terminal 521 outputs a first control signal; when the first buffer 520 stops outputting the data voltage, the control output terminal 521 outputs a second control signal. The first control signal is a high level signal, and the second control signal is a low level signal. The enable controller 534 includes an inverter, and the inverter is connected to the control output terminal 521 and the enable control terminal.

[0060] The enable controller 534 is connected to the control output terminal 521 and the enable control terminal. The enable controller 534 enables the first buffer 520 and the touch signal acquisition unit 530 to work in a time-sharing manner. That is, when the first buffer 520 outputs a data voltage, the second buffer 531 and the differential amplifier 532 form a high impedance state for the data line 202 to reduce or eliminate the influence of the second buffer 531 and the differential amplifier 532 on the data voltage. When the first buffer 520 stops outputting the data voltage, the second buffer 531 and the differential amplifier 532 acquire the touch signal.

[0061] In some embodiments, the enable controller 534 is connected to the enable control terminal and the data processing unit 510, and the data processing unit 510 controls the enable controller 534 to output a first control signal or a second control signal.

[0062] The enable controller 534 is directly controlled by a digital signal. While the data processing unit 510 controls the first buffer 520 to output a data voltage, it controls the enable controller 534 to output a low-level signal, so that the second buffer 531 and the differential amplifier 532 form a high impedance state for the data line 202. While the data processing unit 510 controls the first buffer 520 to stop outputting the data voltage, it controls the enable controller 534 to output a high-level signal, so that the second buffer 531 and the differential amplifier 532 acquire the touch signal for the data line 202.

[0063] The array substrate 200 includes N row scan lines 201 and M column data lines 202, where both N and M are integers greater than or equal to 2. The scan signal of the nth row scan line 201 is Gn, the scan signal of the (n + 1)th row scan line 201 is Gn+1, and the scan signal of the (n + 2)th row scan line 201 is Gn+2. The data voltage of the mth column data line 202 is Vdata, and the data voltage Vdata includes a positive-polarity data voltage and a negative-polarity data voltage. n + 2 is less than or equal to N, and m is less than or equal to M. The enable control terminal signal when scanning the nth row is enable(n), and the enable control terminal signal when scanning the (n + 1)th row is enable(n + 1).

[0064] See Figure 5 As shown, when the scan signal Gn of the nth row scan line 201 arrives, the output terminal of the first buffer 520 outputs the data voltage Vdata, and the enable control terminal signal enable(n) is a low-level signal. The second buffer 531 and the differential amplifier 532 form a high impedance state for the data line 202 to reduce or eliminate the influence of the second buffer 531 and the differential amplifier 532 on the data voltage.

[0065] See Figure 6As shown, when the scan signal Gn of the n-th row scan line 201 arrives, the data voltage Vdata is output from the output terminal of the first buffer 520, and the enable control signal enable(n) is a low-level signal. The second buffer 531 and the differential amplifier 532 form a high impedance state for the data line 202. After the pixel charging is completed, the enable control signal enable(n) is a high-level signal, and the second buffer 531 and the differential amplifier 532 collect the touch voltage. If there is no touch display panel 10, the touch voltage is V1;

[0066] When the scan signal Gn+1 of the (n + 1)-th row scan line 201 arrives, the data voltage Vdata is output from the output terminal of the first buffer 520, and the enable control signal enable(n + 1) is a low-level signal. The second buffer 531 and the differential amplifier 532 form a high impedance state for the data line 202. After the pixel charging is completed, the enable control signal enable(n + 1) is a high-level signal, and the second buffer 531 and the differential amplifier 532 collect the touch voltage. If there is a touch on the touch display panel 10, the touch voltage is V2. By detecting the change of the touch voltage, the touched area of the display panel 10 can be detected, that is, the touch function is realized.

[0067] Embodiment 2

[0068] The present application also provides a driving module 20. Refer to Figure 7 As shown, the driving module 20 includes the data driving circuit 500 and the timing controller 600 disclosed above. The timing controller 600 is connected to the data driving circuit 500. The data driving circuit 500 includes a data processing unit 510 and a touch signal processing unit 540. Both the data processing unit 510 and the touch signal processing unit 540 are connected to the timing controller 600. In addition, the driving module 20 may further include a scan driving circuit 700, and the scan driving circuit 700 is connected to the timing controller 600. In some embodiments, the scan driving circuit 700 may also be disposed on the array substrate 200, and the scan driving circuit 700 is a gate driver on array (GOA).

[0069] The driving module 20 includes a data driving circuit 500. The data driving circuit 500 includes a data processing unit 510, a first buffer 520, a touch signal acquisition unit 530, and a touch signal processing unit 540. A plurality of first buffers 520 are connected to the data processing unit 510. The first buffer 520 is used to convert a data signal into a data voltage and output it to the data line 202. The touch signal acquisition unit 530 is connected to the output end of the first buffer 520, that is, the touch signal acquisition unit 530 and the first buffer 520 are connected to the same data line 202. The touch signal acquisition unit 530 acquires a touch signal during the interval when the first buffer 520 outputs a data voltage, which can avoid the touch detection from occupying the pixel charging time and improve the display effect of the display panel 10.

[0070] Embodiment III

[0071] The present application further provides a display device. Refer to Figure 8 As shown, the display device includes the driving module 20 and the display panel 10 disclosed above, and the display panel 10 is connected to the driving module 20. The driving module 20 includes a timing controller 600. The data line 202 of the display panel 10 is connected to the timing controller 600 through the data driving circuit 500, and the scan line 201 of the display panel 10 is connected to the timing controller 600 through the scan driving circuit 700.

[0072] The display panel 10 includes an array substrate 200. On the side of the array substrate 200 close to the liquid crystal layer 300, there are multiple rows of scan lines 201, multiple columns of data lines 202, and multiple photosensitive devices. The photosensitive devices are thin film transistors 203. The scan lines 201, the data lines 202, and the photosensitive devices form a touch circuit. The thin film transistors 203 correspond one-to-one to the intersection points of the scan lines 201 and the data lines 202. The control end of the thin film transistor 203 is connected to the scan line 201 of the corresponding row, the first end of the thin film transistor 203 is connected to the data line 202 of the corresponding column, and the second end of the thin film transistor 203 can be connected to a bias power supply.

[0073] On the side of the array substrate 200 close to the liquid crystal layer 300, there are also multiple pixel electrodes 204 and multiple switching transistors. The scan lines 201, the data lines 202, and the switching transistors form a pixel driving circuit. The switching transistors correspond one-to-one to the intersection points of the scan lines 201 and the data lines 202. The control end of the switching transistor is connected to the scan line 201 of the corresponding row, the first end of the switching transistor is connected to the data line 202 of the corresponding column, and the second end of the switching transistor is connected to the pixel electrode 204, as Figure 9 shown.

[0074] In some embodiments, the touch control circuit and the pixel driving circuit are combined into one. Specifically, on the side of the array substrate 200 close to the liquid crystal layer 300, a plurality of pixel electrodes 204 and a plurality of switching transistors are further provided. The switching transistors correspond one by one to the intersection points of the scanning lines 201 and the data lines 202. The control terminal of the switching transistor is connected to the scanning line 201 of the corresponding row, the first terminal of the switching transistor is connected to the data line 202 of the corresponding column, and the second terminal of the switching transistor is connected to the pixel electrode 204. The switching transistor is a thin film transistor 203, that is to say, the switching transistor is a photosensitive device.

[0075] The thin film transistor 203 serves both as the switching transistor of the pixel driving circuit and as the photosensitive device of the touch control circuit. The touch control circuit and the pixel driving circuit are combined into one, which simplifies the structure of the display panel 10 and is conducive to reducing the manufacturing cost of the display panel 10 and the display device.

[0076] The terms "first", "second", etc. are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0077] In the present application, unless otherwise clearly specified and limited, terms such as "assembly", "connection", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0078] In the description of this specification, the description with reference to terms such as "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0079] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and the specification of the present application shall fall within the scope covered by the patent of the present application.

Claims

1. A data-driven circuit, comprising a data processing unit and a plurality of first buffers. The first buffers are connected to the data processing unit. The data processing unit is capable of outputting a data signal, and the first buffers are configured to convert the data signal into a data voltage and output it to a data line. It is characterized in that The data driving circuit further includes: A touch signal acquisition unit, which is connected to the first buffer in a one-to-one correspondence. The touch signal acquisition unit includes a second buffer and a differential amplifier. The second buffer is connected to the output end of the first buffer. The second buffer can acquire the touch voltage on the data line during the gap when the first buffer outputs the data voltage. The first input end of the differential amplifier is connected to the output end of the first buffer, and the second input end of the differential amplifier is connected to the output end of the second buffer; A touch signal processing unit, which is connected to the output end of the differential amplifier. The touch signal processing unit is used to output a touch signal, and the touch signal processing unit at least includes a digital-to-analog conversion circuit.

2. The data-driven circuit according to claim 1, wherein The touch signal acquisition unit further includes an isolation device, which connects the first input end of the differential amplifier and the output end of the first buffer. The output end of the first buffer to the first input end of the differential amplifier is unidirectionally conductive through the isolation device.

3. The data-driven circuit according to claim 2, wherein, The isolation device includes a diode. The anode of the diode is connected to the output end of the first buffer, and the cathode of the diode is connected to the first input end of the differential amplifier.

4. The data-driven circuit according to claim 1, wherein The second buffer includes an enable control end. The touch signal acquisition unit further includes an enable controller, which is connected to the enable control end. When the enable controller outputs a second control signal, the second buffer forms a high impedance state for the output end of the first buffer. When the enable controller outputs a first control signal, the touch voltage at the output end of the first buffer can be written into the differential amplifier through the second input end of the differential amplifier.

5. The data-driven circuit according to claim 4, wherein The differential amplifier includes an enable control end. When the enable controller outputs a second control signal, the differential amplifier forms a high impedance state for the output end of the first buffer. When the enable controller outputs a first control signal, the touch voltage at the output end of the first buffer can be written into the differential amplifier through the first input end of the differential amplifier.

6. The data-driven circuit according to claim 4 or 5, characterized in that The enable controller is connected to the enable control end and the data processing unit, and the data processing unit controls the enable controller to output a first control signal or a second control signal.

7. The data-driven circuit according to claim 4 or 5, characterized in that, The first buffer includes a control output end. When the first buffer outputs a data voltage, the control output end outputs a first control signal. When the first buffer stops outputting the data voltage, the control output end outputs a second control signal. The first control signal is a high-level signal, and the second control signal is a low-level signal. The enable controller includes an inverter, and the inverter is connected to the control output end and the enable control end.

8. A driving module, characterized in that, Including: The data driving circuit according to any one of claims 1 to 7; A timing controller, which is connected to the data driving circuit.

9. A display device, characterized in that, Including: The driving module according to claim 8; A display panel, which is connected to the driving module.

10. The display device according to claim 9, wherein The display panel includes a touch layer, an array substrate, a liquid crystal layer, and a counter substrate. The liquid crystal layer is disposed between the array substrate and the counter substrate. On a side of the array substrate close to the liquid crystal layer, there are provided multiple rows of scan lines, multiple columns of data lines, multiple thin film transistors, and multiple pixel electrodes. The thin film transistors correspond one by one to the intersection points of the scan lines and the data lines. A control end of the thin film transistor is connected to the scan line of the corresponding row. A first end of the thin film transistor is connected to the data line of the corresponding column. A second end of the thin film transistor is connected to the pixel electrode. The thin film transistor is a photosensitive device; The touch layer is disposed on a side of the array substrate away from the counter substrate. The touch layer includes multiple touch parts. The position of the touch part corresponds to the position of at least one of the thin film transistors. In a touch state and a non-touch state, the light intensity of the light irradiated on the thin film transistor through the touch part is different.

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