Display driving circuit, signal compensation method and display device

Abstract

Provided are a display driving circuit, a signal compensation method and a display device, belonging to the field of display technology. The display driving circuit includes a source driving circuit, a timing control circuit and a compensation circuit. Among them, the compensation circuit can respond to the control signal transmitted by the timing control circuit when it detects that the pixel to be compensated is refreshed, and compensate the first data signal generated by the source driving circuit into a second data signal with a different potential and then transmit it to the pixel to be compensated, and can respond to the control signal transmitted by the timing control circuit when it detects that the pixel other than the pixel to be compensated is refreshed, and directly transmit the first data signal to the other pixel. In this way, the grayscale compensation can be flexibly and reliably performed on the pixels where the display grayscale is prone to abnormality, so that the display device is not prone to horizontal transverse bright lines, ensuring that the display effect of the display device is better.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display driving circuit, a signal compensation method and a display device. Background Art

[0002] With the rapid development of display technology, there are more and more types of display products on the market, such as TDDI display products that integrate touch and display drivers (TDDI) and conventional display products without touch functions.

[0003] However, affected by the process or driving mode, both TDDI display products and conventional display products have their own stubborn display problems, which are prone to poor display effects. For example, for TDDI display products, they generally have multiple touch sensors arranged in an array. At the junction of touch sensors located in different rows, the grayscale of the display is prone to sudden changes, usually manifested as a grayscale jump, resulting in the appearance of horizontal horizontal bright lines (also called sensor lines) at the junction, affecting the display effect. Summary of the invention

[0004] The present disclosure provides a display driving circuit, a signal compensation method and a display device, which can solve the problem of poor display effect of the display device in the related art. The technical solution is as follows:

[0005] In one aspect, a display driving circuit is provided for driving a display panel to display, wherein the display panel includes a plurality of pixels arranged in an array; the display driving circuit includes: a source driving circuit, a timing control circuit and a compensation circuit;

[0006] The source driving circuit is coupled to an input terminal of the compensation circuit, and the source driving circuit is used to transmit a first data signal to the input terminal of the compensation circuit;

[0007] The timing control circuit is coupled to the control end of the compensation circuit, and the timing control circuit is used to determine at least one row of pixels to be compensated among the multiple rows of pixels, and to transmit a first control signal to the control end of the compensation circuit if it is detected that the at least one row of pixels is refreshed, and to transmit a second control signal to the control end of the compensation circuit if it is detected that the pixels in other rows except the at least one row of pixels are refreshed;

[0008] The output end of the compensation circuit is coupled to multiple columns of pixels. The compensation circuit is used to respond to the first control signal, compensate the first data signal into a second data signal, and transmit it to the multiple columns of pixels, and respond to the second control signal, transmit the first data signal to the multiple columns of pixels, wherein the potential of the second data signal is different from the potential of the first data signal.

[0009] Optionally, the compensation circuit comprises: a plurality of compensation sub-circuits, each of the compensation sub-circuits has the input terminal, the control terminal and the output terminal, and the control terminal comprises: a first control terminal and a second control terminal;

[0010] The source driving circuit is coupled to the input end of each compensation sub-circuit, and the source driving circuit is used to transmit a first data signal to the input end of each compensation sub-circuit;

[0011] The timing control circuit is coupled to the first control terminal and the second control terminal of each compensation sub-circuit, and the timing control circuit is used to transmit a first control signal or a second control signal to both the first control terminal and the second control terminal, and the first control signal transmitted by the timing control circuit to the first control terminal is different from the first control signal transmitted to the second control terminal, and the second control signal transmitted to the first control terminal is the same as the second control signal transmitted to the second control terminal;

[0012] The output ends of the multiple compensation sub-circuits are coupled to the multiple columns of pixels one by one, and each of the compensation sub-circuits is used to respond to the first control signal, compensate the first data signal into a second data signal, and transmit it to a correspondingly coupled column of pixels, and respond to the second control signal, transmit the first data signal to a correspondingly coupled column of pixels.

[0013] Optionally, each of the compensation sub-circuits comprises: a positive compensation unit and a negative compensation unit;

[0014] The positive compensation unit is coupled to the first control terminal, the source driving circuit and the negative compensation unit respectively, and the positive compensation unit is used to transmit the first data signal to the negative compensation unit or transmit the first data signal to the negative compensation unit after performing positive compensation in response to a first control signal received by the first control terminal, and transmit the first data signal to the negative compensation unit in response to a second control signal received by the first control terminal;

[0015] The negative compensation unit is also coupled to the second control terminal and a column of pixels, respectively. The negative compensation unit is used to transmit the signal transmitted by the positive compensation unit to the column of pixels or transmit the signal transmitted by the positive compensation unit to the column of pixels after negative compensation in response to a first control signal received by the second control terminal, and transmit the signal transmitted by the positive compensation unit to the column of pixels in response to a second control signal received by the second control terminal.

[0016] Optionally, the positive compensation unit includes: a first amplifier and a first switch subunit; the negative compensation unit includes: a second amplifier and a second switch subunit;

[0017] The first switch subunit is coupled to the source driving circuit, the first control terminal, the positive phase input terminal of the first amplifier and the output terminal of the first amplifier respectively, the negative phase input terminal of the first amplifier is coupled to the output terminal of the first amplifier, the first switch subunit is used to transmit the first data signal to the output terminal of the first amplifier or to the positive phase input terminal of the first amplifier in response to a first control signal received by the first control terminal, and to transmit the first data signal to the output terminal of the first amplifier in response to a second control signal received by the first control terminal, the first amplifier is used to perform positive compensation on the signal transmitted to the positive phase input terminal of the first amplifier and then transmit it to the output terminal of the first amplifier;

[0018] The second switch subunit is coupled to the output end of the first amplifier, the second control end, the positive phase input end of the second amplifier and the output end of the second amplifier respectively, the negative phase input end of the second amplifier is coupled to the output end of the second amplifier, and the output end of the second amplifier is also coupled to a column of pixels. The second switch subunit is used to transmit the signal received at the output end of the first amplifier to the output end of the second amplifier or to the positive phase input end of the second amplifier in response to the first control signal received at the second control end, and to transmit the signal received at the output end of the first amplifier to the output end of the second amplifier in response to the second control signal received at the second control end. The second amplifier is used to negatively compensate the signal transmitted to the positive phase input end of the second amplifier and then transmit it to the output end of the second amplifier.

[0019] Optionally, the first switch subunit includes: a first P-type transistor and a first N-type transistor; the second switch subunit includes: a second P-type transistor and a second N-type transistor;

[0020] The gate of the first P-type transistor and the gate of the first N-type transistor are both coupled to the first control terminal, the first electrode of the first P-type transistor and the first electrode of the first N-type transistor are both coupled to the source driving circuit, the second electrode of the first P-type transistor is coupled to the output terminal of the first amplifier, and the second electrode of the first N-type transistor is coupled to the non-inverting input terminal of the first amplifier;

[0021] The gate of the second P-type transistor and the gate of the second N-type transistor are both coupled to the second control terminal, the first electrode of the second P-type transistor and the first electrode of the second N-type transistor are both coupled to the output terminal of the first amplifier, the second electrode of the second P-type transistor is coupled to the output terminal of the second amplifier, and the second electrode of the second N-type transistor is coupled to the positive input terminal of the second amplifier.

[0022] Optionally, the display panel comprises: a touch and display driver integrated TDDI display panel;

[0023] The timing control circuit stores row parameters for indicating the position of the at least one row of pixels to be compensated, and the timing control circuit is used to determine the at least one row of pixels to be compensated based on the row parameters.

[0024] Optionally, the timing control circuit is further used to: receive a picture to be displayed for driving the display panel to display, and determine the at least one row of pixels to be compensated based on the picture to be displayed;

[0025] The displayed grayscale of the at least one row of pixels to be compensated is outside the grayscale threshold range, and the displayed grayscales of the other rows of pixels except the at least one row of pixels are within the grayscale threshold range.

[0026] Optionally, the timing control circuit is used to transmit a first control signal to the control end of the compensation circuit with adjacent multi-frame scans as a cycle period, wherein in each of the cycle periods, the first control signal transmitted by the timing control circuit to the control end of the compensation circuit is the same.

[0027] On the other hand, a signal compensation method is provided, which is applied to the timing control circuit included in the display driving circuit as described in the above aspect, and the method includes:

[0028] Determining at least one row of pixels to be compensated among a plurality of rows of pixels included in the display panel;

[0029] If it is detected that the at least one row of pixels is refreshed, a first control signal is transmitted to a control terminal of the compensation circuit, so that the compensation circuit compensates the first data signal into a second data signal in response to the first control signal and transmits the second data signal to the plurality of columns of pixels, wherein the first data signal is a signal transmitted by the source driving circuit to the input terminal of the compensation circuit, and the potential of the second data signal is different from the potential of the first data signal;

[0030] If it is detected that other rows of pixels except the at least one row of pixels are refreshed, a second control signal is transmitted to the control end of the compensation circuit, so that the compensation circuit transmits the first data signal to the multiple columns of pixels in response to the second control signal.

[0031] In yet another aspect, a display device is provided, the display device comprising: a display panel, and the display driving circuit as described in the above aspect;

[0032] The display panel includes a plurality of pixels arranged in an array, and the display driving circuit is coupled to the plurality of pixels to drive the plurality of pixels to emit light.

[0033] In summary, the beneficial effects brought about by the technical solution provided by the embodiments of the present disclosure may at least include:

[0034] A display driving circuit, a signal compensation method and a display device are provided. The display driving circuit includes a source driving circuit, a timing control circuit and a compensation circuit. The compensation circuit can respond to a control signal transmitted by the timing control circuit when it detects that the pixel to be compensated is refreshed, and compensate the first data signal generated by the source driving circuit into a second data signal with a different potential and transmit it to the pixel to be compensated, and can respond to a control signal transmitted by the timing control circuit when it detects that the pixel other than the pixel to be compensated is refreshed, and directly transmit the first data signal to the other pixel. In this way, the grayscale compensation can be flexibly and reliably performed on the pixels where the display grayscale is prone to abnormality, so that the display device is not prone to horizontal transverse bright lines, ensuring that the display effect of the display device is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a schematic diagram of a display product display abnormality provided by an embodiment of the present disclosure;

[0037] Figure 2is a structural schematic diagram of a display driving circuit provided by an embodiment of the present disclosure;

[0038] Figure 3 is a structural schematic diagram of another display driving circuit provided by an embodiment of the present disclosure;

[0039] Figure 4 is a schematic diagram of the structure of a compensation sub-circuit provided by an embodiment of the present disclosure;

[0040] Figure 5 is a structural schematic diagram of another compensation sub-circuit provided in an embodiment of the present disclosure;

[0041] Figure 6 is a structural schematic diagram of another compensation sub-circuit provided in an embodiment of the present disclosure;

[0042] Figure 7 is a timing diagram of a compensation method provided by an embodiment of the present disclosure;

[0043] Figure 8 is a flow chart of a signal compensation method provided by an embodiment of the present disclosure;

[0044] Fig. 9 It is a structural schematic diagram of a display device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0046] In combination with the background technology, it can be known that for TDDI display products, due to the setting of the touch sensor sensor, when the display panel displays the picture, the display grayscale of the adjacent touch sensors located in different rows is easy to be adjusted higher, which leads to the adjacent part being easy to appear as follows: Figure 1 The horizontal bright lines shown in Figure (2) can be called "sensor lines", which affect the display effect. In addition, in order to achieve touch detection, a target row of pixels is usually reserved for touch detection after each adjacent row of pixels. And for the target row of pixels, the data signal transmitted to the row of pixels is different from the data signal transmitted to other rows of pixels, and a signal fluctuation similar to a "pit" shape appears. This signal fluctuation will also cause a sudden change in the displayed grayscale, and usually also manifests as a grayscale jump, causing the target row of pixels to have a higher luminous brightness, thereby appearing at the target row. Figure 1 The horizontal bright lines shown in Figure (1) can be called "pit patterns", which also affect the display effect. For conventional display products, their display panels are prone to such Figure 1The horizontal smear H-Crosstalk phenomenon shown in Figure (3) of the video. The H-Crosstalk phenomenon refers to the grayscale difference at the boundary of the grayscale jump, which causes different display brightness and also affects the display effect. It should be noted that the H-Crosstalk phenomenon is particularly obvious when large-size display products display low-grayscale images. Generally, the grayscale difference is within 1 to 2 grayscales, which is visible to the naked eye and affects the user experience.

[0047] Based on this, the embodiments of the present disclosure provide a display driving circuit, through which data signals can be compensated, and the problems of poor lateral linearity caused by various reasons (such as sensor lines, pit lines and H-Crosstalk phenomenon recorded in the above embodiments) can be made up, thereby ensuring a better display effect.

[0048] Figure 2 1 is a schematic diagram of a display driving circuit provided by an embodiment of the present disclosure, which is used to drive the display panel 10 to display. Figure 2 It can be seen that the display panel 10 may generally include a plurality of pixels P1 arranged in an array, that is, may include a plurality of rows and columns of pixels P1. The display driving circuit 00 may include: a source driving circuit 01, a timing control circuit 02 and a compensation circuit 03, and the timing control circuit 02 may also be called a timing controller (TCON).

[0049] The source driving circuit 01 is coupled (ie, electrically connected) to the input terminal Vin of the compensation circuit 03 . The source driving circuit 01 is used to transmit a first data signal Vdata1 to the input terminal Vin of the compensation circuit 03 .

[0050] The timing control circuit 02 is coupled to the control terminal TE of the compensation circuit 03. The timing control circuit 02 is used to determine at least one row of pixels to be compensated among the multiple rows of pixels, and to transmit a first control signal to the control terminal of the compensation circuit if it is detected that the at least one row of pixels is refreshed, and to transmit a second control signal to the control terminal of the compensation circuit if it is detected that the pixels in other rows except the at least one row of pixels are refreshed.

[0051] For example, for Figure 1 When the sensor pattern shown in the first figure is compensated, the relevant parameters (hereinafter referred to as row parameters) for indicating the specific number of rows of at least one row of pixels to be compensated can be pre-stored in the timing control circuit 02. Accordingly, when working, the timing control circuit 02 can directly determine the at least one row of pixels to be compensated reliably and quickly based on the row parameters.

[0052] The output terminal Vout of the compensation circuit 03 is coupled to the multiple columns of pixels P1 ( Figure 2The coupling relationship is not shown). The compensation circuit 03 is used to compensate the first data signal Vdata1 into the second data signal Vdata2 in response to the first control signal and transmit it to the multiple columns of pixels P1, and is also used to transmit the first data signal Vdata1 to the multiple columns of pixels in response to the second control signal. That is, the compensation circuit 03 can transmit the first data signal Vdata1 or the second data signal Vdata2 after compensating the first data signal Vdata1 to the multiple columns of pixels.

[0053] Among them, the potential of the compensated second data signal Vdata2 is different from the potential of the first data signal Vdata1. For example, the potential of the second data signal Vdata2 may be greater than the potential of the first data signal Vdata1, and this compensation method may also be called positive compensation, that is, the compensation circuit 03 may increase the potential of the first data signal Vdata1. Alternatively, the potential of the compensated second data signal Vdata2 may be less than the potential of the first data signal Vdata1, and this compensation method may also be called negative compensation, that is, the compensation circuit 03 may lower the potential of the first data signal Vdata1.

[0054] In the embodiment of the present disclosure, positive compensation or negative compensation may depend on the potential of the first control signal. For example, the compensation circuit 03 may be used to positively compensate the first data signal Vdata1 in response to the first control signal of the first potential, and may be used to negatively compensate the first data signal Vdata1 in response to the first control signal of the second potential. And as described in the above embodiment, the compensation circuit 03 may also not compensate the first data signal Vdata1 in response to the received second control signal. That is, the timing control circuit 02 described in the embodiment of the present disclosure may transmit different control signals to the compensation circuit 03 so that the compensation circuit 03 selects whether to compensate the first data signal Vdata1 and how to compensate.

[0055] Optionally, in the embodiment of the present disclosure, the first potential may be a high potential, the second potential may be a low potential, and the potential of the second control signal may also be a low potential and be the same as the second potential.

[0056] In summary, the embodiments of the present disclosure provide a display driving circuit, which includes a source driving circuit, a timing control circuit and a compensation circuit. Among them, the compensation circuit can respond to the control signal transmitted by the timing control circuit when it detects that the pixel to be compensated is refreshed, and compensate the first data signal generated by the source driving circuit into a second data signal with a different potential and then transmit it to the pixel to be compensated, and can respond to the control signal transmitted by the timing control circuit when it detects that the pixel other than the pixel to be compensated is refreshed, and directly transmit the first data signal to the other pixel. In this way, the grayscale compensation of pixels that are prone to abnormal display grayscale can be flexibly and reliably performed, so that the display device is not prone to horizontal transverse bright lines, ensuring that the display effect of the display device is better.

[0057] Figure 3 FIG. 1 is a schematic diagram of another display driving circuit provided by an embodiment of the present disclosure. Figure 3 As shown, the compensation circuit 03 may include: a plurality of compensation sub-circuits 031, each compensation sub-circuit 031 may have an input terminal Vin, a control terminal TE and an output terminal Vout, and the control terminal TE may include: a first control terminal TEp and a second control terminal TEn.

[0058] The source driving circuit 01 may be coupled to the input terminal Vin of each compensation sub-circuit 031. The source driving circuit 01 may be used to transmit a first data signal Vdata1 to the input terminal of each compensation sub-circuit 031. It should be noted that the first data signal Vdata1 transmitted by the source driving circuit 01 to each compensation sub-circuit 031 is different.

[0059] Optional, reference Figure 3 It can also be seen that the timing control circuit 02 can also be coupled to the source driving circuit 01, and is used to drive the source driving circuit 01 to generate the first data signal Vdata1. For example, the timing control circuit 02 can receive the picture to be displayed, and based on the picture to be displayed, reliably drive the source driving circuit 01 to generate the first data signal Vdata1, so that the display panel 10 can display the picture to be displayed. In other words, the source driving circuit 01 can generate the first data signal Vdata1 under the drive of the timing control circuit 02.

[0060] The timing control circuit 02 can be coupled to both the first control terminal TEp and the second control terminal TEn of each compensation sub-circuit 031. The timing control circuit 02 can be used to transmit a first control signal or a second control signal to both the first control terminal TEp and the second control terminal TEn. The first control signal transmitted by the timing control circuit 02 to the first control terminal TEp is different from the first control signal transmitted to the second control terminal TEn (e.g., it can refer to different potentials), and the second control signal transmitted by the timing control circuit 02 to the first control terminal TEp is the same as the second control signal transmitted to the second control terminal TEn (e.g., the same potential). Here, different signals can refer to different signals within the same time period (e.g., one frame scan).

[0061] For example, if the potential of the first control signal transmitted by the timing control circuit 02 to the first control terminal TEp is the first potential "1" during a certain period, the potential of the first control signal transmitted to the second control terminal TEn may be the second potential "0". Conversely, if the potential of the first control signal transmitted by the timing control circuit 02 to the first control terminal TEp is the second potential "0" during a certain period, the potential of the first control signal transmitted to the second control terminal TEn may be the first potential "1". And, in the same period, the potential of the second control signal transmitted by the timing control circuit 02 to the first control terminal TEp and the potential of the second control signal transmitted to the second control terminal TEn are both the second potential "0".

[0062] The output terminals Vout of the plurality of compensation sub-circuits 031 may be coupled to the plurality of columns of pixels P1 in a one-to-one correspondence. That is, each compensation sub-circuit 031 is coupled to a column of pixels P1, and each compensation sub-circuit 031 is coupled to a different column of pixels P1. Figure 3 , the output terminal Vout of each compensation sub-circuit 031 can be coupled to each pixel P1 located in the same column through a data line Data. Accordingly, the number of compensation sub-circuits 031 included in the compensation circuit 03 can be the same as the number of columns of pixels P1. For example, if m columns of pixels P1 are included, the compensation circuit 03 can correspondingly include m compensation sub-circuits 031, where m is an integer greater than 1. Each compensation sub-circuit 031 can be used to respond to a first control signal, compensate the first data signal Vdata1 to a second data signal Vdata2, and transmit it to a corresponding coupled column of pixels P1, and respond to a second control signal, transmit the first data signal Vdata1 to a corresponding coupled column of pixels P1.

[0063] Figure 4 Schematic diagram of a compensation subcircuit provided by an embodiment of the present disclosure. Figure 4 As shown, each compensation sub-circuit 031 may include: a positive compensation unit 0311 and a negative compensation unit 0312 .

[0064] The positive compensation unit 0311 is respectively coupled to the first control terminal TEp, the source driving circuit 01 and the negative compensation unit 0312. That is, the positive compensation unit 0311 may have an input terminal Vin as described in the above embodiment to connect to the source driving circuit 01 ( Figure 4 The positive compensation unit 0311 may be configured to transmit the first data signal Vdata1 to the negative compensation unit 0312 or transmit the first data signal Vdata1 to the negative compensation unit 0312 after performing positive compensation in response to the first control signal received by the first control terminal TEp, and may transmit the first data signal Vdata1 to the negative compensation unit 0312 in response to the second control signal received by the first control terminal TEp.

[0065] For example, the positive compensation unit 0311 can perform positive compensation on the first data signal Vdata1 and then transmit it to the negative compensation unit 0312 when the potential of the received first control signal is the first potential, and can directly transmit the first data signal Vdata1 to the negative compensation unit 0312 when the potential of the received first control signal is the second potential or a second control signal is received.

[0066] The negative compensation unit 0312 may also be coupled to the second control terminal TEn and a column of pixels P1, respectively. That is, the negative compensation unit 0312 may have an output terminal Vout as described in the above embodiment to couple with a column of pixels P1 ( Figure 4 The negative compensation unit 0312 may be used to transmit the signal transmitted by the positive compensation unit 0311 to a column of pixels P1 or to transmit the signal transmitted by the positive compensation unit 0311 to a column of pixels P1 after negative compensation in response to the first control signal received by the second control terminal TEn, and may directly transmit the signal transmitted by the positive compensation unit 0311 to a column of pixels P1 in response to the second control signal received by the second control terminal TEn.

[0067] For example, the negative compensation unit 0312 may negatively compensate the signal transmitted by the positive compensation unit 0311 and transmit it to a column of pixels P1 when the potential of the received first control signal is the first potential, and may directly transmit the signal transmitted by the positive compensation unit 0311 to a column of pixels P1 when the received first control signal is the second potential or the second control signal is received. In combination with the working principle of the above-mentioned positive compensation unit 0311, it can be known that the signal transmitted by the positive compensation unit 0311 may be the first data signal Vdata1, or may be the first data signal Vdata1 after positive compensation.

[0068] It should be noted that, because in the same time period, the first control signal transmitted by the timing control circuit 02 to the first control terminal TEp is different from the first control signal transmitted to the second control terminal TEn, that is, among the first control terminal TEp and the second control terminal TEn, when the potential of the first control signal received by one control terminal is the first potential, the potential of the first control signal received by the other control terminal is the second potential.

[0069] On this basis, in combination with the above embodiments, it can be known that when the positive compensation unit 0311 performs positive compensation on the first data signal Vdata1 based on the first control signal of the first potential and then transmits it to the negative compensation unit 0312, the negative compensation unit 0312 can directly transmit the first data signal Vdata1 after positive compensation transmitted by the positive compensation unit 0311 to a column of pixels through the output terminal Vout based on the first control signal of the second potential, thereby reliably achieving positive compensation of the pixels. And, when the positive compensation unit 0311 directly transmits the first data signal Vdata1 to the negative compensation unit 0312 based on the first control signal of the second potential, the negative compensation unit 0312 can perform negative compensation on the first data signal Vdata1 transmitted by the positive compensation unit 0311 based on the first control signal of the first potential and then transmit it to a column of pixels P1 through the output terminal Vout, thereby reliably achieving negative compensation of the pixels.

[0070] Figure 5 is a schematic diagram of the structure of another compensation sub-circuit provided in an embodiment of the present disclosure. Figure 5 As shown, the positive compensation unit 0311 may include: a first amplifier OP1 and a first switch subunit 03111. The negative compensation unit 0312 includes: a second amplifier OP2 and a second switch subunit 03121.

[0071] The first switch subunit 03111 can be coupled to the source driving circuit 01, the first control terminal TEp, the positive phase input terminal (+) of the first amplifier OP1 and the output terminal of the first amplifier OP1 respectively, and the negative phase input terminal (-) of the first amplifier OP1 can be coupled to the output terminal of the first amplifier OP1. That is, the first switch subunit 03111 can have the input terminal Vin described in the above embodiment to connect to the source driving circuit 01 ( Figure 5The first switch subunit 03111 can be used to transmit the first data signal Vdata1 to the output end of the first amplifier OP1 or to the positive phase input end (-) of the first amplifier OP1 in response to the first control signal received by the first control end TEp, and can transmit the first data signal Vdata1 to the output end of the first amplifier OP1 in response to the second control signal received by the first control end TEp. The first amplifier OP1 can be used to perform forward compensation on the signal transmitted to the positive phase input end (+) of the first amplifier OP1 and transmit it to the output end of the first amplifier OP1.

[0072] For example, the first switch subunit 03111 can transmit the first data signal Vdata1 to the non-inverting input terminal (+) of the first amplifier OP1 when the potential of the received first control signal is the first potential. At this time, the first amplifier OP1 can perform forward compensation on the first data signal Vdata1 through its internal amplification function and then transmit it to the output terminal of the first amplifier OP1. Also, the first switch subunit 03111 can directly transmit the first data signal Vdata1 to the output terminal of the first amplifier OP1 when the potential of the received first control signal is the second potential or the second control signal is received. At this time, the first amplifier OP1 does not perform forward compensation on the first data signal Vdata1, that is, the first amplifier OP1 does not work.

[0073] The second switch subunit 03121 can be coupled to the output terminal of the first amplifier OP1, the second control terminal TEn, the positive phase input terminal (+) of the second amplifier OP2, and the output terminal of the second amplifier OP2, respectively. The negative phase input terminal (-) of the second amplifier OP2 is coupled to the output terminal of the second amplifier OP2, and the output terminal of the second amplifier OP2 is also coupled to a column of pixels P1. That is, the second switch subunit 03121 can have an output terminal Vout described in the above embodiment to connect to a column of pixels P1 ( Figure 5 The second switch subunit 03121 can be used to transmit the signal received at the output end of the first amplifier OP1 to the output end of the second amplifier OP2 or to the positive phase input end (+) of the second amplifier OP2 in response to the first control signal received at the second control end TEn, and can transmit the signal received at the output end of the first amplifier OP1 to the output end of the second amplifier OP2 in response to the second control signal received at the second control end TEn. The second amplifier OP2 can be used to negatively compensate the signal transmitted to the positive phase input end (+) of the second amplifier OP2 and transmit it to the output end of the second amplifier OP2.

[0074] For example, the second switch subunit 03121 can transmit the signal received at the output end of the first amplifier OP1 to the non-inverting input end (-) of the second amplifier OP2 when the potential of the received first control signal is the first potential, and the second amplifier OP2 can negatively compensate the received signal through its internal amplification function and transmit it to the output end of the second amplifier OP2. Also, the second switch subunit 03121 can directly transmit the signal received at the output end of the first amplifier OP1 to the output end of the second amplifier OP2 when the potential of the received first control signal is the second potential or the second control signal is received, so as to further transmit it to a coupled column of pixels P1, and at this time, the second amplifier OP2 does not negatively compensate the signal received at the output end of the first amplifier OP1, that is, the second amplifier OP2 does not work.

[0075] It should be noted that, as described in the above embodiment, the signal that the second amplifier OP2 performs negative compensation processing on may refer to: the first data signal Vdata1 received at the output end of the first amplifier OP1. The signal that the second amplifier OP2 does not perform negative compensation processing on may refer to: the first data signal Vdata1 received at the output end of the first amplifier OP1 after positive compensation.

[0076] Figure 6 is a schematic diagram of the structure of another compensation sub-circuit provided by an embodiment of the present disclosure. Figure 6 As shown, the first switch subunit 03111 may include: a first P-type transistor T11 and a first N-type transistor T12. The second switch subunit 03121 may include: a second P-type transistor T21 and a second N-type transistor T22.

[0077] Among them, the gate of the first P-type transistor T11 and the gate of the first N-type transistor T12 can both be coupled to the first control terminal TEp, the first electrode of the first P-type transistor T11 and the first electrode of the first N-type transistor T12 can both be coupled to the source drive circuit 01, the second electrode of the first P-type transistor T11 can be coupled to the output terminal of the first amplifier OP1, and the second electrode of the first N-type transistor T12 can be coupled to the positive input terminal (+) of the first amplifier OP1.

[0078] The gate of the second P-type transistor T21 and the gate of the second N-type transistor T22 can both be coupled to the second control terminal TEn, the first electrode of the second P-type transistor T21 and the first electrode of the second N-type transistor T22 can both be coupled to the output terminal of the first amplifier OP1, the second electrode of the second P-type transistor T21 can be coupled to the output terminal of the second amplifier OP2, and the second electrode of the second N-type transistor T22 can be coupled to the non-inverting input terminal (+) of the second amplifier OP2.

[0079] Because for a P-type transistor, it can be turned on in response to a low potential and turned off in response to a high potential, and for an N-type transistor, it can be turned off in response to a low potential and turned on in response to a high potential. Figure 6 In the structure shown, taking the first potential of the first control signal as a high potential, and the second potential of the first control signal and the potential of the second control signal as a low potential as an example, it can be seen that:

[0080] If the first control terminal TEp receives a first control signal of a high potential, the first P-type transistor T11 and the first N-type transistor T12 are turned on. At this time, the source drive circuit 01 can be connected to the positive input terminal (+) of the first amplifier OP1 through the input terminal Vin, and the first data signal Vdata1 generated by the source drive circuit 01 can be reliably transmitted to the positive input terminal (+) of the first amplifier OP1 for forward compensation by the first amplifier OP1. If the first control terminal TEp receives a first control signal of a low potential or receives a second control signal, the first P-type transistor T11 and the first N-type transistor T12 are turned on. At this time, the source drive circuit 01 can be connected to the output terminal of the first amplifier OP1 through the input terminal Vin, and the first data signal Vdata1 generated by the source drive circuit 01 can be reliably transmitted to the output terminal of the first amplifier OP1.

[0081] Similarly, if the second control terminal TEn receives a first control signal of a high potential, the second P-type transistor T21 and the second N-type transistor T22 are turned on. At this time, the output end of the first amplifier OP1 can be connected to the positive input end (+) of the second amplifier OP2, and the signal received by the output end of the first amplifier OP1 can be reliably transmitted to the positive input end (+) of the second amplifier OP2 for negative compensation by the second amplifier OP2. If the second control terminal TEn receives a first control signal of a low potential or receives a second control signal, the second P-type transistor T21 and the second N-type transistor T22 are turned on. At this time, the output end of the first amplifier OP1 can be connected to the output end of the first amplifier OP1, and the signal received by the output end of the first amplifier OP1 can be reliably transmitted to the output end of the first amplifier OP1.

[0082] Optionally, the transistors described in the embodiments of the present disclosure may all be metal-oxide-semiconductor field-effect transistors (MOSFETs). And one of the first and second electrodes of the transistor may be a source electrode and the other may be a drain electrode. Figure 6 , the first pole shown is the source and the second pole is the drain.

[0083] In addition, combined Figure 6 It can be seen that an offset voltage (Vos) is formed between the positive input terminal (+) and the negative input terminal (-) of the first amplifier OP1, and the same is true for the second amplifier OP2. On this basis, it can be determined that: assuming that the voltage of the first data signal Vdata1 is Vt, the voltage of the second data signal Vdata after positive compensation can be: Vt+Vos, and the voltage of the second data signal Vdata after negative compensation can be: Vt-Vos. Based on this, it can be determined that the compensation capability is related to Vos. Therefore, the first amplifier OP1 and the second amplifier OP2 can be flexibly selected to achieve reliable compensation of the display grayscale.

[0084] According to the above records, in the embodiment of the present disclosure, a compensation sub-circuit 031 including a positive compensation unit 0311 and a negative compensation unit 0312 is coupled between the source driving circuit 02 and each data line Data. Among them, the positive compensation unit 0311 may include PMOS and NMOS, and the PMOS and NMOS may be coupled to the first control terminal TEp. The negative compensation unit 0312 may also include PMOS and NMOS, and the PMOS and NMOS may be coupled to the second control terminal TEn. The first control terminal TEp and the second control terminal TEn may be controlled by TCON, that is, receive the control signal provided by TCON. The control signal received by the first control terminal TEp may further control the on or off of the coupled PMOS and NMOS, and the control signal received by the second control terminal TEn may further control the on or off of the coupled PMOS and NMOS. The final embodiment is to realize the positive compensation or negative compensation of the first data signal Vdata1 generated by the source driving circuit 02, that is, the output terminal Vout generates a voltage: Vt+ / -Vos.

[0085] As an optional implementation, the display panel described in the embodiment of the present disclosure may include: a TDDI display panel integrating a touch control and display driver. On this basis, the timing control circuit 02 may store row parameters for indicating the position of at least one row of pixels to be compensated, and the timing control circuit 02 may be used to determine at least one row of pixels to be compensated based on the row parameters.

[0086] For example, for the compensation of "pit patterns", the row parameters can be initially set in the timing control circuit 02: the row position to which the "pit patterns" belong, and the corresponding number of rows that need to be compensated, such as 1 row, 2 rows, 3 rows or 4 rows before and / or after the pit. Afterwards, the timing control circuit 02 can directly determine the row where the pixels that need to be compensated are located based on the initial setting, that is, determine at least one row of pixels to be compensated. Among them, the number of rows that need to be compensated before and / or after the pit can be flexibly set according to actual needs. For example, assuming that horizontal horizontal bright lines appear in the 4 rows before the pit, the 4 rows before the pit can be determined as pixels to be compensated, that is, data signal compensation is performed for each of the 4 rows before the pit. It should be noted that the above settings can be flexibly set and written into the timing control circuit 02 by the developer during the test phase before leaving the factory.

[0087] As another optional implementation, the timing control circuit 02 may also be used to: receive a picture to be displayed for driving the display panel to display, and determine at least one row of pixels to be compensated based on the picture to be displayed.

[0088] Among them, the display grayscale of at least one row of pixels to be compensated is outside the grayscale threshold range, and the display grayscale of other rows of pixels except at least one row of pixels is within the grayscale threshold range. The grayscale threshold range can be pre-written into the timing control circuit 02 before leaving the factory, and can include a grayscale upper limit value and a grayscale lower limit value. Pixels that are not within the grayscale threshold range can be determined by the timing control circuit 02 as pixels that need to be compensated. Of course, in some other embodiments, the grayscale threshold range can also be replaced by a grayscale threshold. The function of determining at least one row of pixels to be compensated based on the picture to be displayed can also be called a picture detection function (PDF).

[0089] Optionally, the timing control circuit 02 may be configured to transmit the first control signal to the control terminal of the compensation circuit 03 with adjacent multiple frame scans as a cycle period.

[0090] In each cycle, the first control signal transmitted by the timing control circuit 02 to the control terminal of the compensation circuit 03 may be the same. For example, the cycle may be every 4 adjacent frames, and each of the 4 adjacent frames may be supplemented with the same or different first control signals.

[0091] It should be noted that the specific auxiliary first control signal can be flexibly set in the test before delivery and written into the timing control circuit 02 in the form of instructions for subsequent use by the timing control circuit 02. Figure 6The structure shown in the figure is taken as an example, and the cycle period is every 4 adjacent frames. The following Table 1 shows a total of 15 different possible signal transmission modes. In Table 1, "+" indicates positive compensation, "-" indicates negative compensation, and " / " indicates no compensation. Every 4 adjacent frames are represented by Frame n, Frame n+1, Frame n+2 and Frame n+3, and n is an integer greater than or equal to 1.

[0092] Table 1

[0093]

[0094]

[0095] In combination with the above Table 1 and the above embodiment records, it can be known that when a first control signal of a first potential "1" is provided to the first control terminal TEp, and a first control signal of a second potential "0" is provided to the second control terminal TEn, positive "+" compensation for the first data signal Vdata1 can be achieved. When a first control signal of a second potential "0" is provided to the first control terminal TEp, and a first control signal of a first potential "1" is provided to the second control terminal TEn, negative "-" compensation for the first data signal Vdata1 can be achieved. When a second control signal of a second potential "0" is provided to the first control terminal TEp, and a second control signal of a second potential "0" is provided to the second control terminal TEn, no compensation " / " is performed on the first data signal Vdata1.

[0096] In the test phase before delivery, the 15 methods mentioned above can be used in sequence to transmit control signals to the first control terminal TEp and the second control terminal TEn, and one or more methods with relatively good display effects after final compensation are written into the timing control circuit 02. After delivery, the timing control circuit 02 can directly call the stored method to transmit the required control signals to the first control terminal TEp and the second control terminal TEn accordingly, so as to realize reliable compensation of the display grayscale.

[0097] For example, suppose that during testing, it is found that the compensation effect is relatively good when the fifth method in Table 1 above is used, that is, in the four adjacent frames, the first frame selects "TEp: high potential (1), TEn: low potential (0)", the second frame selects "TEp: low potential (0), TEn: high potential (1)", the third frame selects "TEp: low potential (0), TEn: high potential (1)", and the fourth frame selects "TEp: low potential (0), TEn: high potential (1)". Then, the potential corresponding to this method can be written into the timing control circuit 02 for the timing control circuit 02 to call, and the signal of the corresponding potential is transmitted to the first control terminal TEp and the second control terminal TEn, so as to realize reliable compensation of the displayed grayscale. Taking this as an example, Figure 7A timing diagram of a compensation method for compensating for "pit texture" is shown, wherein the horizontal axis refers to time and the vertical axis refers to voltage.

[0098] refer to Figure 7 It can be seen that in the first frame, among the four adjacent frames, the timing control circuit 02 transmits a control signal of a high potential "1" to the first control terminal TEp, and transmits a control signal of a low potential "0" to the second control terminal TEn, thereby realizing positive compensation for the first data signal Vdata1, pulling up the potential of the first data signal Vdata1, so that the potential of the first data signal Vdata1 jumps from Vt to Vt+Vos. In the second frame, the third frame, and the fourth frame, the timing control circuit 02 transmits a control signal of a low potential "0" to the first control terminal TEp, and transmits a control signal of a high potential "1" to the second control terminal TEn, thereby realizing negative compensation for the first data signal Vdata1, pulling down the potential of the first data signal Vdata1, so that the potential of the first data signal Vdata1 jumps from Vt to Vt-Vos. Figure 7 "TP" is used to indicate where the pit is located.

[0099] It should be noted that the above compensation method is also applicable to Figure 1 The display device using the display driving circuit has a better display effect.

[0100] In summary, the embodiments of the present disclosure provide a display driving circuit, which includes a source driving circuit, a timing control circuit and a compensation circuit. Among them, the compensation circuit can respond to the control signal transmitted by the timing control circuit when it detects that the pixel to be compensated is refreshed, and compensate the first data signal generated by the source driving circuit into a second data signal with a different potential and then transmit it to the pixel to be compensated, and can respond to the control signal transmitted by the timing control circuit when it detects that the pixel other than the pixel to be compensated is refreshed, and directly transmit the first data signal to the other pixel. In this way, the grayscale compensation of pixels that are prone to abnormal display grayscale can be flexibly and reliably performed, so that the display device is not prone to horizontal transverse bright lines, ensuring that the display effect of the display device is better.

[0101] Figure 8 FIG. 1 is a flow chart of a signal compensation method provided by an embodiment of the present disclosure, which can be applied to the timing control circuit 02 included in the display driving circuit in the above embodiment. Figure 8 As shown, the method includes:

[0102] Step 801: Determine at least one row of pixels to be compensated among a plurality of rows of pixels included in a display panel.

[0103] Step 802: If it is detected that the at least one row of pixels is refreshed, a first control signal is transmitted to the control terminal of the compensation circuit, so that the compensation circuit responds to the first control signal, compensates the first data signal into a second data signal, and then transmits it to multiple columns of pixels.

[0104] The first data signal may be a signal transmitted from the source driving circuit to the input end of the compensation circuit, and the potential of the second data signal is different from the potential of the first data signal.

[0105] Step 803: If it is detected that other rows of pixels except the at least one row of pixels are refreshed, a second control signal is transmitted to the control terminal of the compensation circuit, so that the compensation circuit transmits the first data signal to multiple columns of pixels in response to the second control signal.

[0106] In summary, the embodiment of the present disclosure provides a signal compensation method. In this method, when the timing control circuit detects that the pixel to be compensated is refreshed, the timing control circuit can transmit a first control signal to the compensation circuit to control the compensation circuit to compensate the first data signal generated by the source driving circuit into a second data signal with a different potential and then transmit it to the pixel to be compensated, and when the timing control circuit detects that the pixel other than the pixel to be compensated is refreshed, the timing control circuit can transmit a second control signal to the compensation circuit to control the compensation circuit to directly transmit the first data signal to the other pixel. In this way, the grayscale compensation of pixels that are prone to abnormal grayscale display can be flexibly and reliably performed, so that the display device is not prone to horizontal horizontal bright lines, ensuring that the display effect of the display device is better.

[0107] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific implementation of each step described above can refer to the corresponding description of the device embodiment, and will not be repeated here.

[0108] Fig. 9 is a schematic diagram of the structure of a display device provided by an embodiment of the present disclosure. Fig. 9 As shown, the display device includes: a display panel 10, and a display driving circuit 00 as shown in the above figures.

[0109] Among them, combined Figure 2 and Figure 3 It can be seen that the display panel 10 may include a plurality of pixels P1 arranged in an array. Fig. 9 The display driving circuit 00 can be coupled to a plurality of pixels P1 in the display panel 10 to drive the plurality of pixels P1 to emit light.

[0110] For example, in combination with the above embodiment, the display driving circuit 00 can transmit the first data signal Vdata1 or the second data signal Vdata2 to the multiple columns of pixels P1. In addition, the display driving circuit 00 can also include a gate driving circuit in addition to the circuits described in the above embodiment, and the gate driving circuit can be coupled to the multiple rows of pixels P1 in a one-to-one correspondence and used to transmit gate driving signals to the multiple rows of pixels.

[0111] On this basis, for each pixel P1, it can emit light based on the received gate drive signal and data signal. For example, each pixel P1 may include a pixel circuit and a light-emitting element, and the pixel circuit may transmit the received data signal to the light-emitting element in response to the received gate drive signal to drive the light-emitting element to emit light. In some embodiments, the gate drive circuit may transmit the gate drive signal to multiple rows of pixels P1 row by row, thereby driving the multiple rows of pixels P1 to emit light row by row.

[0112] Optionally, the display device recorded in the embodiments of the present disclosure may be: an organic light-emitting diode (OLED) display device, an active-matrix organic light-emitting diode (AMOLED) display device, a mobile phone, a tablet computer, a flexible display device, a television set, a monitor, and any other product or component with a display function.

[0113] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be the common meanings understood by people with ordinary skills in the field to which the present disclosure belongs.

[0114] For example, the words "first", "second" or "third" and similar words used in the patent application specification and claims of this disclosure do not indicate any order, quantity or importance, but are merely used to distinguish different components.

[0115] Likewise, the words “a” or “an” and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

[0116] Words such as “include” or “comprising” and the like mean that the elements or objects preceding “include” or “comprising” include the elements or objects listed after “include” or “comprising” and their equivalents, and do not exclude other elements or objects.

[0117] "Up", "down", "left" or "right" etc. are only used to indicate relative position relationship. When the absolute position of the described object changes, the relative position relationship may also change accordingly. "Connected" or "coupled" refers to electrical connection.

[0118] "And / or" indicates that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship.

[0119] The above description is only an optional 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 protection scope of the present disclosure.

Claims

1. A display driving circuit, characterized in that: Used to drive a display panel to display, wherein the display panel includes a plurality of pixels arranged in an array; The display driving circuit comprises: a source driving circuit, a timing control circuit and a compensation circuit; the compensation circuit comprises: a plurality of compensation sub-circuits, each of which has an input terminal, a control terminal and an output terminal, and the control terminal comprises: a first control terminal and a second control terminal; The source driving circuit is coupled to the input end of each compensation sub-circuit, and the source driving circuit is used to transmit a first data signal to the input end of each compensation sub-circuit; The timing control circuit is coupled to the first control terminal and the second control terminal of each compensation sub-circuit, and the timing control circuit is used to transmit a first control signal or a second control signal to both the first control terminal and the second control terminal, and the first control signal transmitted by the timing control circuit to the first control terminal is different from the first control signal transmitted to the second control terminal, and the second control signal transmitted to the first control terminal is the same as the second control signal transmitted to the second control terminal; the timing control circuit is also used to determine at least one row of pixels to be compensated among multiple rows of pixels, and to transmit the first control signal to the first control terminal and the second control terminal if it is detected that the at least one row of pixels is refreshed, and to transmit the second control signal to the first control terminal and the second control terminal if it is detected that the pixels are refreshed to other rows except the at least one row of pixels; The output ends of the multiple compensation sub-circuits are coupled to multiple columns of pixels in a one-to-one correspondence, and each of the compensation sub-circuits is used to respond to the first control signal, compensate the first data signal into a second data signal, and transmit it to a correspondingly coupled column of pixels, and respond to the second control signal, transmit the first data signal to a correspondingly coupled column of pixels, wherein the potential of the second data signal is different from the potential of the first data signal.

2. The display driving circuit according to claim 1, characterized in that: Each of the compensation sub-circuits comprises: a positive compensation unit and a negative compensation unit; The positive compensation unit is coupled to the first control terminal, the source driving circuit and the negative compensation unit respectively, and the positive compensation unit is used to transmit the first data signal to the negative compensation unit or transmit the first data signal to the negative compensation unit after performing positive compensation in response to a first control signal received by the first control terminal, and transmit the first data signal to the negative compensation unit in response to a second control signal received by the first control terminal; The negative compensation unit is also coupled to the second control terminal and a column of pixels, respectively. The negative compensation unit is used to transmit the signal transmitted by the positive compensation unit to the column of pixels or transmit the signal transmitted by the positive compensation unit to the column of pixels after negative compensation in response to a first control signal received by the second control terminal, and transmit the signal transmitted by the positive compensation unit to the column of pixels in response to a second control signal received by the second control terminal.

3. The display driving circuit according to claim 2, characterized in that: The positive compensation unit includes: a first amplifier and a first switch subunit; the negative compensation unit includes: a second amplifier and a second switch subunit; The first switch subunit is coupled to the source driving circuit, the first control terminal, the positive phase input terminal of the first amplifier and the output terminal of the first amplifier respectively, the negative phase input terminal of the first amplifier is coupled to the output terminal of the first amplifier, the first switch subunit is used to transmit the first data signal to the output terminal of the first amplifier or to the positive phase input terminal of the first amplifier in response to a first control signal received by the first control terminal, and to transmit the first data signal to the output terminal of the first amplifier in response to a second control signal received by the first control terminal, the first amplifier is used to perform positive compensation on the signal transmitted to the positive phase input terminal of the first amplifier and then transmit it to the output terminal of the first amplifier; The second switch subunit is coupled to the output end of the first amplifier, the second control end, the positive phase input end of the second amplifier and the output end of the second amplifier respectively, the negative phase input end of the second amplifier is coupled to the output end of the second amplifier, and the output end of the second amplifier is also coupled to a column of pixels. The second switch subunit is used to transmit the signal received at the output end of the first amplifier to the output end of the second amplifier or to the positive phase input end of the second amplifier in response to the first control signal received at the second control end, and to transmit the signal received at the output end of the first amplifier to the output end of the second amplifier in response to the second control signal received at the second control end. The second amplifier is used to negatively compensate the signal transmitted to the positive phase input end of the second amplifier and then transmit it to the output end of the second amplifier.

4. The display driving circuit according to claim 3, characterized in that: The first switch subunit includes: a first P-type transistor and a first N-type transistor; the second switch subunit includes: a second P-type transistor and a second N-type transistor; The gate of the first P-type transistor and the gate of the first N-type transistor are both coupled to the first control terminal, the first electrode of the first P-type transistor and the first electrode of the first N-type transistor are both coupled to the source driving circuit, the second electrode of the first P-type transistor is coupled to the output terminal of the first amplifier, and the second electrode of the first N-type transistor is coupled to the non-inverting input terminal of the first amplifier; The gate of the second P-type transistor and the gate of the second N-type transistor are both coupled to the second control terminal, the first electrode of the second P-type transistor and the first electrode of the second N-type transistor are both coupled to the output terminal of the first amplifier, the second electrode of the second P-type transistor is coupled to the output terminal of the second amplifier, and the second electrode of the second N-type transistor is coupled to the positive input terminal of the second amplifier.

5. The display driving circuit according to any one of claims 1 to 4, characterized in that: The display panel includes: a touch and display driver integrated TDDI display panel; The timing control circuit stores row parameters for indicating the position of the at least one row of pixels to be compensated, and the timing control circuit is used to determine the at least one row of pixels to be compensated based on the row parameters.

6. The display driving circuit according to any one of claims 1 to 4, characterized in that: The timing control circuit is further used for: receiving a picture to be displayed for driving the display panel to display, and determining at least one row of pixels to be compensated based on the picture to be displayed; The displayed grayscale of the at least one row of pixels to be compensated is outside the grayscale threshold range, and the displayed grayscales of the other rows of pixels except the at least one row of pixels are within the grayscale threshold range.

7. The display driving circuit according to any one of claims 1 to 4, characterized in that: The timing control circuit is used to transmit the first control signal to the first control end and the second control end with adjacent multi-frame scanning as a cycle period, wherein in each of the cycle periods, the first control signal transmitted by the timing control circuit to the first control end and the second control end is the same.

8. A signal compensation method, characterized in that: Applied to the timing control circuit included in the display driving circuit according to any one of claims 1 to 7, the method comprises: Determining at least one row of pixels to be compensated among a plurality of rows of pixels included in the display panel; If it is detected that the at least one row of pixels is refreshed, a first control signal is transmitted to a first control terminal and a second control terminal of each compensation sub-circuit in the compensation circuit, so that each compensation sub-circuit compensates the first data signal into a second data signal in response to the first control signal, and then transmits the second data signal to a correspondingly coupled column of pixels, wherein the first data signal is a signal transmitted by the source driving circuit to the input terminal of each compensation sub-circuit, and the potential of the second data signal is different from the potential of the first data signal; If it is detected that refresh is performed to other rows of pixels except for the at least one row of pixels, a second control signal is transmitted to the first control terminal and the second control terminal of each compensation sub-circuit in the compensation circuit, so that each compensation sub-circuit transmits the first data signal to a corresponding coupled column of pixels in response to the second control signal.

9. A display device, characterized in that: The display device comprises: a display panel, and a display driving circuit as claimed in any one of claims 1 to 7; The display panel includes a plurality of pixels arranged in an array, and the display driving circuit is coupled to the plurality of pixels to drive the plurality of pixels to emit light.

Images