A brightness compensation method, device and display device for a display panel

Abstract

The present invention discloses a brightness compensation method, device and display device for a display panel. The brightness compensation method includes: obtaining the position information of a data line in the display panel; wherein, the position information includes the serial number information of the data lines arranged along a set direction; the serial number information represents the position of the border circuit corresponding to the data line; the border circuit is used to connect the data line and the data signal generation module, and different positions of the border circuit have different transmission impedances; according to the position information, a brightness compensation model is used to determine the data signal input to the data line; wherein, the brightness compensation model establishes a relationship model between the position information and the brightness compensation value, and the brightness compensation model includes a brightness compensation model table. Compared with the prior art, the present invention can improve the brightness uniformity of the display panel and the display effect of the display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and in particular, to a method, an apparatus, and a display device for compensating the brightness of a display panel. Background Art

[0002] With the continuous development of display technologies, people have higher and higher requirements for display panels. In particular, the display image quality of display panels has always been the goal that people constantly pursue. However, when the existing display panels are displaying, there will be a problem of uneven display brightness, which is mainly reflected in that the middle area of the display panel is too bright or the two side areas of the display panel are too bright, that is, there is a bright band problem when the existing display panels are displaying. Summary of the Invention

[0003] The present invention provides a method, an apparatus, and a display device for compensating the brightness of a display panel, so as to improve the brightness uniformity of the display panel and the display effect of the display panel.

[0004] According to one aspect of the present invention, there is provided a method for compensating the brightness of a display panel, the brightness compensation method including:

[0005] Obtaining position information of data lines in the display panel; wherein, the position information includes serial number information of the data lines arranged along a set direction; the serial number information represents the position of a border circuit corresponding to the data line; the border circuit is used to connect the data line and a data signal generation module, and different positions of the border circuit have different transmission impedances;

[0006] According to the position information, determining a data signal input to the data line by using a brightness compensation model; wherein, the brightness compensation model establishes a relationship model between the position information and a brightness compensation value, and the brightness compensation model includes a brightness compensation model table.

[0007] Optionally, the position information further includes pixel position information corresponding to the data signal currently transmitted by the data line;

[0008] The brightness compensation model includes a border circuit impedance model, a data line impedance model, and a brightness compensation model table;

[0009] The determining a data signal input to the data line according to the position information and the brightness compensation model specifically includes:

[0010] Determining the transmission impedance of the data line according to the pixel position information and the data line impedance model;

[0011] Determining the transmission impedance of the border circuit corresponding to the data line according to the serial number information and the border circuit impedance model;

[0012] Look up the corresponding brightness compensation value from the brightness compensation model table according to the transmission impedance of the data line corresponding to the data line and the transmission impedance of the border circuit.

[0013] Optionally, the border circuit includes at least one of: a multiplexing circuit and fan-out region traces;

[0014] Among them, the transmission impedances of the multiplexing circuits at different positions are different; the brightness compensation model table establishes a relationship model between the transmission impedance of the multiplexing circuit and the brightness compensation value;

[0015] The fan-out region traces are used to transmit the data signal to the data line, and the transmission impedances of the fan-out region traces at different positions are different; the brightness compensation model table establishes a relationship model between the transmission impedance of the fan-out region traces and the brightness compensation value;

[0016] Preferably, the brightness compensation model table establishes a relationship model between the comprehensive transmission impedance of the multiplexing circuit and the fan-out region traces and the brightness compensation value.

[0017] Optionally, the border circuit impedance module includes a first impedance sub-model corresponding to the multiplexing circuit and a second impedance sub-model corresponding to the fan-out region traces;

[0018] The specific process of determining the transmission impedance of the border circuit corresponding to the data line according to the serial number information and the border circuit impedance model includes:

[0019] Determine the transmission impedance of the multiplexing traces corresponding to the data line according to the serial number information and the first impedance sub-model;

[0020] Determine the transmission impedance of the fan-out region traces corresponding to the data line according to the serial number information and the second impedance sub-model.

[0021] Optionally, the brightness compensation model establishes a relationship model between the comprehensive serial number information, the pixel position information and the brightness compensation value.

[0022] Optionally, the brightness compensation value is the compensated data signal; or, the brightness compensation value is a compensation coefficient; the compensated data signal is determined by the compensation coefficient and the data signal before brightness compensation.

[0023] Optionally, the brightness compensation value represents the driving force of the data signal; or, the brightness compensation value represents the voltage of the data signal.

[0024] Optionally, before determining the data signal input to the data line using the brightness compensation model, it further includes:

[0025] Establish the brightness compensation model; the input of the brightness compensation model is the position information, and the output of the brightness compensation model is the data signal;

[0026] Preferably, the step of obtaining the brightness compensation model is executed before the display panel leaves the factory; the brightness compensation model matches different display panels.

[0027] According to another aspect of the present invention, there is provided a brightness compensation device for a display panel, the brightness compensation device comprising:

[0028] A position information acquisition module, configured to acquire the position information of the data line in the display panel; wherein, the position information includes the serial number information of the data lines arranged along a set direction; the serial number information represents the position of the border circuit corresponding to the data line; the border circuit is used to connect the data line and the data signal generation module, and the transmission impedance is different when the positions of the border circuits are different;

[0029] A data signal compensation module, configured to determine the data signal input to the data line according to the position information by using a brightness compensation model; wherein, the brightness compensation model establishes a relationship model between the position information and the brightness compensation value, and the brightness compensation model includes a brightness compensation model table.

[0030] According to another aspect of the present invention, there is provided a display device, the display device comprising a driving chip and a display panel, and the driving chip is configured to execute the brightness compensation method provided in any embodiment of the present invention to perform brightness compensation on the display panel.

[0031] This embodiment provides a brightness compensation method for a display panel, which establishes a relationship model between the position information of the data line and the brightness compensation value, that is, a brightness compensation model. Among them, the position information includes the serial number information of the data lines arranged along a set direction. Since different data lines have different positions in the display panel, the corresponding positions of the border circuits are different, and the corresponding transmission impedances are different. Therefore, in this embodiment, the position information (including the serial number information) of the data line is first obtained, and then the brightness compensation value corresponding to the position information is found in the brightness compensation model according to the position information, and the final data signal input to the data line is determined according to the brightness compensation value. Among them, the brightness compensation value can compensate for the line loss caused by the transmission impedance of different positions of the border circuit of the data signal, thereby reducing the problem of uneven brightness in different areas of the display panel. In summary, the brightness compensation method for the display panel provided in this embodiment can improve the brightness uniformity of the display panel and the display effect of the display panel.

[0032] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become readily apparent from the following description. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 is a schematic flowchart of a method for compensating the brightness of a display panel according to an embodiment of the present invention;

[0035] Figure 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;

[0036] Figure 3 is a schematic structural diagram of another display device according to an embodiment of the present invention;

[0037] Figure 4 is a schematic structural diagram of another display device according to an embodiment of the present invention;

[0038] Figure 5 is a schematic structural diagram of another display device according to an embodiment of the present invention;

[0039] Figure 6 is a schematic flowchart of another method for compensating the brightness of a display panel according to an embodiment of the present invention;

[0040] Figure 7 is a schematic flowchart of another method for compensating the brightness of a display panel according to an embodiment of the present invention;

[0041] Figure 8 is a schematic structural diagram of a device for compensating the brightness of a display panel according to an embodiment of the present invention. Detailed Embodiments

[0042] In order to enable those skilled in the art to better understand the solution of the present invention, the following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0044] Figure 1 is a schematic flow chart of a brightness compensation method for a display panel provided according to an embodiment of the present invention. Refer to Figure 1 The brightness compensation method provided in this embodiment includes the following steps:

[0045] S110. Obtain the position information of the data line in the display panel; wherein, the position information includes the serial number information of the data lines arranged along the set direction; the serial number information represents the position of the border circuit corresponding to the data line; the border circuit is used to connect the data line and the data signal generation module, and different positions of the border circuit have different transmission impedances.

[0046] Specifically, the data signal generation module is used to generate and output data signals, and the data lines are used to drive the pixel circuit with the received data signals to generate corresponding driving currents. The border circuit is connected between the data signal generation module and the data line, and is used to transmit the data signals generated by the data signal generation module to the corresponding data line.

[0047] The serial number information of the data line refers to the position of the data line in the display panel, and this serial number information can be the number of the data line. Since there is a corresponding relationship between the data line and the border circuit, the serial number information can represent the position of the border circuit corresponding to the data line. Exemplarily, Figure 2 is a schematic structural diagram of a display device provided according to an embodiment of the present invention. Refer to Figure 2 The display device includes a data signal generation module 110, a border area 120 and a display area 130. The border area 120 includes border circuits, such as fan-out area traces. The display area 130 includes sub-pixel units arranged in an array and data lines arranged in sequence. Figure 2 D1, D2, D3... D8 in Figure 2It can be seen that the positions of the border circuits corresponding to different serial number information are different. For example, the data lines with serial number information D1 and D8 are close to the edge of the display panel, and the data lines with serial number information D4 and D5 are close to the middle of the display panel. To meet the wiring requirements of the display panel, the lengths of the fan-out area traces are different, and the corresponding transmission impedances are also different. For example, the fan-out area traces located at the edge of the display panel are longer and have a larger transmission impedance; the fan-out area traces located in the middle of the display panel are shorter and have a smaller transmission impedance. Therefore, the transmission impedances of the data signals at different positions of the border circuit are different. Exemplarily, taking Figure 2 the R11, R12... R18 in

[0048] S120, the data signal input to the data line is determined according to the position information by using a brightness compensation model; wherein, the brightness compensation model establishes a relationship model between the position information and the brightness compensation value, and the brightness compensation model includes a brightness compensation model table.

[0049] Specifically, as can be seen from the foregoing analysis, after the display panel is manufactured, the connection positions of different data lines to the border circuit have been determined, and the transmission impedance at the corresponding position in the border circuit is also determined. Therefore, a corresponding brightness compensation value can be established according to the position information of the data line, thereby forming a brightness compensation model. In this brightness compensation model, when the position information of the data line is determined, the brightness compensation value corresponding to this position information can be found accordingly, and then the data signal input to the data line can be determined according to the brightness compensation value.

[0050] This embodiment provides a brightness compensation method for a display panel. This method establishes a relationship model between the position information of data lines and the brightness compensation value, that is, the brightness compensation model. Among them, the position information includes the serial number information of the data lines arranged in a set direction. Since different data lines have different positions in the display panel, the corresponding positions of the border circuits are different, and the corresponding transmission impedances are different. Therefore, in this embodiment, the position information (including serial number information) of the data lines is first obtained, and then the brightness compensation value corresponding to the position information is found in the brightness compensation model according to the position information, and the data signal finally input to the data line is determined according to the brightness compensation value. Among them, the brightness compensation value can compensate for the line loss caused by the transmission impedance of different positions of the border circuit of the data signal, thereby reducing the problem of uneven brightness in different areas of the display panel. In summary, the brightness compensation method for the display panel provided in this embodiment can improve the brightness uniformity of the display panel and the display effect of the display panel.

[0051] Optionally, the position information further includes the pixel position information corresponding to the data signal currently transmitted by the data line; the brightness compensation model includes a border circuit impedance model, a data line impedance model, and a brightness compensation model table. Determining the data signal input to the data line according to the position information and the brightness compensation model specifically includes: determining the transmission impedance of the data line according to the pixel position information and the data line impedance model; determining the transmission impedance of the border circuit corresponding to the data line according to the serial number information and the border circuit impedance model; and looking up the corresponding brightness compensation value from the brightness compensation model table according to the transmission impedance of the data line corresponding to the data line and the transmission impedance of the border circuit.

[0052] Specifically, the brightness compensation model includes a border circuit impedance model, a data line impedance model, and a brightness compensation model table. The brightness compensation model table includes both the brightness compensation values corresponding to different transmission impedances in the data line and the brightness compensation values corresponding to different transmission impedances in the border circuit. According to the pixel position information, the distance between the current pixel and the border circuit can be determined, so as to determine the transmission impedance of the data line corresponding to the current pixel. Different serial number information corresponds to different positions of the border circuit, and different positions in the border circuit correspond to corresponding transmission impedances. Therefore, the transmission impedance corresponding to the serial number information is found in the border circuit impedance model. The reason why the transmission impedance of the border circuit and the transmission impedance of the data line both affect the light emission brightness of the display panel is that the data signal generates line loss due to the transmission impedance of the border circuit and the transmission impedance of the data line, so that the output data signal is different from the pixel received data signal. Therefore, the brightness compensation value can compensate for the line loss on the border circuit and the line loss on the data line of the data signal, make the light emission brightness of different areas of the display panel approximately the same, improve the uniformity of the light emission of the display panel, and improve the display effect.

[0053] Optionally, the border circuit includes at least one of a multiplexing circuit and fan-out region traces. Exemplarily, Figure 3 is a schematic structural diagram of another display device provided according to an embodiment of the present invention. Refer to Figure 3 , the fan-out region trace S1 is used to transmit data signals to the data lines, and the transmission impedances of the fan-out region traces S1 at different positions are different; the brightness compensation model table establishes a relationship model between the transmission impedance of the fan-out region trace S1 and the brightness compensation value.

[0054] Specifically, Figure 3 The border circuit shown in includes a fan-out region 122, and the fan-out region trace S1 is located in the fan-out region 122. The transmission impedances of the fan-out region traces S1 with different lengths are different. The longer the length of the fan-out region trace S1, the greater the transmission impedance of the fan-out region trace S1, and the greater the line loss of the fan-out region trace S1. Exemplarily, the length of the fan-out region trace S1 in the middle region within the fan-out region 122 is less than the length of the fan-out region trace S1 in the two side regions. Therefore, the transmission impedance in the middle region within the fan-out region 122 is less than the transmission impedance in the two side regions. If the data signal is not compensated, it will cause the brightness in the middle region of the display panel to be too high. The brightness compensation model in this embodiment may include the transmission impedance of the fan-out region trace S1 corresponding to the position information, so that the brightness compensation value corresponding to the transmission impedance of the fan-out region trace S1 can be obtained according to the position information. The brightness compensation value can compensate for the line loss of the data signal on the fan-out region trace S1, thereby reducing the problem of uneven brightness of the display panel caused by the transmission impedance of the fan-out region trace S1.

[0055] Optionally, Figure 4 is a schematic structural diagram of another display device provided according to an embodiment of the present invention. Refer to Figure 4 , the multiplexing circuit 121 is controlled by a multiplexing signal; the transmission impedances of the multiplexing circuits 121 at different positions are different; the brightness compensation model table establishes a relationship model between the transmission impedance of the multiplexing circuit and the brightness compensation value.

[0056] Specifically, Figure 4 The border circuit in the display device shown in includes a multiplexing circuit 121. The multiplexing circuit 121 includes a plurality of multiplexing switches T1 and at least one multiplexing trace MUX. The transmission impedances of the multiplexing circuits 121 corresponding to different data lines are different. Specifically, the multiplexing signals received by the multiplexing switches T1 at different positions are different. Among them, the greater the line loss of the multiplexing signal, the smaller the opening degree of the multiplexing switch T1, and the greater the line loss of the data signal. Exemplarily, refer to Figure 4, in the direction where the data line D1 points to the data line D8, the multiplexing signal is transmitted on the multiplexing trace MUX. The farther the multiplexing signal is transmitted on the multiplexing trace MUX, the greater the impedance at the corresponding position. Therefore, for the same multiplexing trace MUX, the transmission impedance at the first multiplexing switch T1 is less than that at the second multiplexing switch T1, and the transmission impedance at the second multiplexing switch T1 is less than that at the third multiplexing switch T2... Correspondingly, the opening degree of the first multiplexing switch T1 is greater than that of the second multiplexing switch T1, and the opening degree of the second multiplexing switch T1 is greater than that of the third multiplexing switch T1... The greater the opening degree of the multiplexing switch T1, the smaller the on-resistance of the multiplexing switch T1 itself, and the smaller the line loss of the data signal. When the data signal received by the multiplexing switch T1 is not compensated, compared with the data line D2, the line loss of the data signal received by the data line D1 is smaller, and compared with the data line D3, the line loss of the data signal received by the data line D2 is smaller... Different data signals received by different data lines will cause uneven brightness of the display panel. In this embodiment, a relationship model between the transmission impedance of the multiplexing circuit and the brightness compensation value is established, so that the multiplexing circuits 121 at different positions correspond to different brightness compensation values, that is, the data lines at different positions correspond to different brightness compensation values, and finally the data signals received by each data line are approximately equal, making the display of the display panel more uniform.

[0057] In the above embodiment, taking the multiplexing signal input from the left side of the display panel as an example for illustration, it is not a limitation to the present invention. In other embodiments, the multiplexing signal can also be set to be input from the right side of the display panel, or the multiplexing signal can also be input from both sides of the multiplexing circuit 121 to the middle. If the multiplexing signal is input from both sides of the multiplexing circuit 121 to the middle, the transmission impedance in the middle area of the multiplexing circuit 121 is greater than that on both sides, that is, the line loss of the multiplexing signal in the middle area of the multiplexing circuit 121 is greater than that on both sides. If the data signal is not compensated, it will cause the brightness of the two side areas of the display panel to be greater than that of the middle area. The brightness compensation method provided in this embodiment establishes corresponding brightness compensation values according to the multiplexing circuits 121 at different positions, so that the data signals passing through the border circuit and input to different data lines are approximately the same, and finally reduces the problem that the brightness of the display panel 130 is uneven due to the transmission impedance of the multiplexing circuit.

[0058] It should be noted that Figure 4The type of the multiplexing circuit 121 shown is 1:2 type, and two multiplexing traces MUX are required, which is not a limitation of the present invention. In other embodiments, the type of the multiplexing circuit 121 can also be set to other types such as 1:3 type, 1:6 type, etc., and can be set according to needs in actual applications, and the brightness compensation method provided by the embodiments of the present invention can be adopted.

[0059] Optionally, the brightness compensation model table establishes a relationship model between the transmission impedance of the comprehensive multiplexing circuit and the fan-out region traces and the brightness compensation value.

[0060] Specifically, Figure 5 is a schematic structural diagram of another display device provided by the embodiment of the present invention. Refer to Figure 5 , Figure 5 In the shown border circuit, it includes both the multiplexing circuit 121 and the fan-out region 122. There are multiple fan-out region traces S1 with different lengths in the fan-out region 122, and the line losses of the data signal on the fan-out region traces S1 with different lengths are different. The transmission impedances corresponding to different positions of the multiplexing circuit 121 are different, and there is a line loss of the multiplexing signal on the multiplexing circuit 121. The transmission impedance of the multiplexing circuit 121 and the transmission impedance of the fan-out region traces S1 will both affect the light emission brightness of the display panel, mainly because the line losses of the multiplexing signal and the data signal will both affect the light emission brightness of the display panel. Therefore, by establishing a relationship model for brightness compensation based on the comprehensive transmission impedance of the multiplexing circuit and the fan-out region traces S1, the corresponding brightness compensation value can be obtained according to the position information. The brightness compensation value can compensate for the line losses of the multiplexing signal and the fan-out region traces S1 corresponding to the position information, thereby reducing the problem of uneven brightness of the display panel caused by the transmission impedance of the fan-out region traces S1 and the transmission impedance of the multiplexing circuit 121. The brightness compensation model provided by this embodiment has a wide application range and can match different border circuits, thereby compensating different display panels. The brightness compensation model can be directly stored in the driving chip of the display panel. The brightness compensation model includes the data signal corresponding to the position information, specifically including the transmission impedance of the border circuit corresponding to the position information and the data signal corresponding to the transmission impedance of the border circuit. Compared with storing the compensation value corresponding to each pixel or the compensation value corresponding to every few pixels, the brightness compensation model provided by this embodiment occupies less data storage space and can reduce the compensation cost.

[0061] The brightness compensation method provided by this embodiment makes the light emission brightness of the display panel consistent by changing the data signal output by the data signal generation module 110, without having to increase the voltage of the multiplexing signal to ensure that the opening degree of each multiplexing switch T1 is consistent, which can reduce power consumption and compensation cost to a certain extent.

[0062] Optionally, the brightness compensation model establishes a relationship model integrating serial number information, pixel position information, and brightness compensation values; preferably, the line loss of the border circuit is positively correlated with the transmission impedance of the border circuit, and the line loss of the data line is positively correlated with the transmission impedance of the data line.

[0063] Specifically, referring to Figure 5 further, the transmission impedance of the border circuit can be determined based on the transmission impedance of the multiplexing circuit 121 in the border circuit and the transmission impedance of the fan-out region trace S1. The greater the transmission impedance of the border circuit, the greater the line loss of the border circuit.

[0064] Since the transmission impedances at different positions on the data line are different. Exemplarily, in the data line D1, the transmission impedance of the data line D1 corresponding to the bottommost pixel is less than the transmission impedance of the data line D1 corresponding to the topmost pixel. Therefore, the line losses of the data signal transmitted to different positions on the data line will be different. If the line loss on the data line is not compensated, it will cause different pixel emission brightnesses at different positions connected to the same data line. Therefore, it is necessary to determine the pixel position information, so that the transmission impedance corresponding to the pixel on the data line can be determined according to the pixel position information, and then corresponding compensation can be made according to the transmission impedance. Therefore, setting the position information to further include the pixel position information corresponding to the data signal currently transmitted on the data line can make the brightness compensation further integrate the transmission impedance of the border circuit and the transmission impedance on the data line, further ensuring the uniformity of the display panel emission and improving the display effect of the display panel.

[0065] Optionally, the border circuit impedance model includes a first impedance sub-model corresponding to the multiplexing circuit and a second impedance sub-model corresponding to the fan-out region trace.

[0066] Determining the transmission impedance of the border circuit corresponding to the data line according to the serial number information and the border circuit impedance model specifically includes: determining the transmission impedance of the multiplexing trace circuit corresponding to the data line according to the serial number information and the first impedance sub-model.

[0067] Specifically, the first impedance sub-model includes the transmission impedances of the multiplexing circuits corresponding to different data lines of different display panels. Continuing to refer to Figure 5, according to the serial number information, the position of the multiplexer switch T1 connected to the data line can be determined. Thus, the transmission impedance corresponding to the same position can be found in the first impedance sub-model according to the position of the multiplexer switch T1, and then the transmission impedance of the multiplexing circuit 121 corresponding to the serial number information can be determined. Exemplarily, if the serial number information of the data line D1 is D1, then it can be determined according to the serial number information D1 that the multiplexer switch T1 connected to the data line D1 is located at the leftmost side of the first multiplexing trace MUX. After determining the position of the multiplexer switch T1 connected to the data line D1, the transmission impedance corresponding to the multiplexer switch T1 at the same position is found in the first impedance sub-model, so that the transmission impedance corresponding to the serial number information D1 can be determined. The data lines D2, D3, etc. use the same method to obtain the transmission impedance of the multiplexing circuit 121 at the corresponding positions.

[0068] Determine the transmission impedance of the fan-out trace corresponding to the data line according to the serial number information and the second impedance sub-model.

[0069] Specifically, the second impedance sub-model includes the transmission impedances corresponding to the different fan-out traces of different display panels. Continuing to refer to Figure 5 , according to the serial number information, the position of the fan-out trace S1 for transmitting the data signal to the corresponding data line can also be determined. According to the position of the fan-out trace S1, the corresponding transmission impedance is found from the second impedance sub-model. Exemplarily, if the serial number information of the data line D1 is D1, then it can be determined according to the serial number information D1 that the fan-out trace S1 connected to the data line D1 is located at the leftmost side of the fan-out area 122. According to the position of the fan-out trace S1, the transmission impedance corresponding to the fan-out trace S1 at the same position is found from the second impedance sub-model. The data lines D2, D3, etc. use the same method to obtain the transmission impedance of the fan-out trace S1 at the corresponding positions.

[0070] Figure 6 is a schematic flowchart of another brightness compensation method for a display panel provided according to an embodiment of the present invention. Refer to Figure 6 , the brightness compensation method provided in this embodiment includes the following steps:

[0071] S110. Obtain the position information of the data line in the display panel; wherein, the position information includes the serial number information of the data lines arranged along the set direction; the serial number information represents the position of the border circuit corresponding to the data line; the border circuit is used to connect the data line and the data signal generation module, and different positions of the border circuit have different transmission impedances.

[0072] S121. Determine the transmission impedance of the data line according to the pixel position information and the data line impedance model.

[0073] S122. Determine the transmission impedance of the multiplexing circuit corresponding to the data line according to the serial number information and the first impedance sub-model.

[0074] S123. Determine the transmission impedance of the fan-out area trace corresponding to the data line according to the serial number information and the second impedance sub-model.

[0075] S124. Look up the corresponding brightness compensation value from the brightness compensation model table according to the transmission impedance of the data line corresponding to the data line, the transmission impedance of the multiplexing circuit corresponding to the data line, and the transmission impedance of the fan-out area trace. Specifically, the brightness compensation model table stores the brightness compensation values in tabular form and establishes a mapping relationship between the transmission impedance of the data line corresponding to the comprehensive data line, the transmission impedance of different fan-out area traces, the transmission impedance of different multiplexing circuits, and the brightness compensation values. Such a setting can achieve the technical effect of querying the corresponding brightness compensation value through the transmission impedance of the data line, the transmission impedance of the multiplexing circuit, and the transmission impedance of the fan-out area trace.

[0076] As can be seen from the above steps, in the process of brightness compensation in the embodiment of the present invention, corresponding compensation queries are performed through the data line impedance model, the first impedance sub-model, and the second impedance sub-model, which is not a limitation of the present invention. In other embodiments, it is also possible to set the brightness compensation model table to directly establish a mapping relationship between the position of the data line and the brightness compensation value. In this way, the corresponding compensation value can be directly queried through the position of the data line. Correspondingly, the data line impedance model, the first impedance sub-model, and the second impedance sub-model can be established and applied before the display panel leaves the factory, and the following is a specific description.

[0077] Figure 7 is a schematic flowchart of another brightness compensation method for a display panel provided by an embodiment of the present invention. Refer to Figure 7 , the brightness compensation method provided in this embodiment includes the following steps:

[0078] S210. Establish a data line impedance model, a first impedance sub-model, and a second impedance sub-model.

[0079] Specifically, detect the transmission impedance corresponding to pixels at different positions to establish a data line impedance model, detect the transmission impedance corresponding to multiplexing circuits at different positions to establish a first impedance sub-model, and detect the transmission impedance corresponding to different fan-out area traces to establish a second impedance sub-model. Establishing the data line impedance model, the first impedance sub-model, and the second impedance sub-model before leaving the factory can shorten the time for brightness compensation of the display panel. Exemplarily, when the serial number information of the data line is obtained, the position of the multiplexing circuit can be determined according to the serial number information, and thus the transmission impedance corresponding to the same position can be found in the first impedance sub-model according to the position of the multiplexing circuit.

[0080] S220. Establish a brightness compensation model table.

[0081] The establishment of the brightness compensation model table is completed before determining the data signal input to the data line using the brightness compensation model. The input of the brightness compensation model is position information, and the output of the brightness compensation model is the data signal. Preferably, the steps for obtaining the brightness compensation model are executed before the display panel leaves the factory. The brightness compensation model matches different display panels.

[0082] Specifically, the brightness compensation model provided in this embodiment has a wide range of applications and can match different border circuits, thereby compensating different display panels. The brightness compensation model can be directly stored in the driving chip of the display panel. The brightness compensation model includes the data signal corresponding to the position information, specifically including the transmission impedance of the border circuit corresponding to the position information and the transmission impedance corresponding to the pixel, the data signal corresponding to the transmission impedance of the border circuit, and the data signal corresponding to the combined transmission impedance of the data line.

[0083] S230. Obtain the position information of the data line.

[0084] S240. Determine the corresponding brightness compensation value according to the position information, the data line impedance model, the first impedance sub-model, the second impedance sub-model, and the brightness compensation model table.

[0085] Specifically, after obtaining the position information of the data line, the position of the pixel, the position of the multiplexing circuit, and the position of the fan-out area trace can be determined according to the position information. Thus, the transmission impedance corresponding to the same position can be found in the data line impedance model according to the position of the pixel, the transmission impedance corresponding to the same position can be found in the first impedance sub-model according to the position of the multiplexing circuit, and the transmission impedance corresponding to the same position can be found in the second impedance sub-model according to the position of the fan-out area trace. Then, the data signal corresponding to the transmission impedance of the data line, the data signal corresponding to the transmission impedance of the fan-out area trace, and the data signal corresponding to the transmission impedance of the multiplexing circuit are found in the brightness compensation model table, and finally the data signal corresponding to the position information is determined.

[0086] Optionally, the brightness compensation value is the data signal after compensation. Alternatively, the brightness compensation value is a compensation coefficient; the data signal after brightness compensation is determined by the compensation coefficient and the data signal before brightness compensation.

[0087] Specifically, the brightness compensation value is the compensated data signal. The compensated data signal can compensate for the line loss caused by the transmission impedance of the border circuit and the line loss caused by the transmission impedance of the data line. Inputting the compensated data signal into the data line can reduce the problem of uneven brightness of the display panel and improve the display effect of the display panel. Exemplarily, the brightness-compensated data signal can be determined by the product of the compensation coefficient and the data signal before brightness compensation; or the brightness-compensated data signal can be determined by the addition of the compensation coefficient and the data signal before brightness compensation.

[0088] Optionally, the brightness compensation value characterizes the driving force of the data signal; or, the brightness compensation value characterizes the voltage of the data signal.

[0089] Specifically, the greater the driving force, the stronger the driving ability of the data signal. When the impedance corresponding to some positions of the border circuit is large, a larger driving force can be applied to this part, so that the brightness compensation value can compensate for the line loss of this part. The greater the voltage of the data signal, the stronger the ability of the data signal to compensate for the line loss caused by the transmission impedance of the border circuit and the line loss caused by the transmission impedance of the data line.

[0090] The embodiment of the present invention also provides a brightness compensation device for a display panel. This device can be implemented by hardware and / or software, and this device can be integrated into the driving chip of the display panel. For example, it can be integrated into the data signal generation module. This device can be used to execute the brightness compensation method provided by any embodiment of the present invention.

[0091] Figure 8 It is a schematic structural diagram of a brightness compensation device for a display panel provided by an embodiment of the present invention. Refer to Figure 8 , the brightness compensation device provided in this embodiment includes: a position information acquisition module 210, configured to acquire the position information of the data line in the display panel; wherein, the position information includes the serial number information of the data line arranged along the set direction; the serial number information characterizes the position of the border circuit corresponding to the data line; the border circuit is used to connect the data line and the data signal generation module, and the transmission impedance of the border circuit is different at different positions; a data signal compensation module 220, configured to determine the data signal input to the data line according to the position information by using a brightness compensation model; wherein, the brightness compensation model establishes a relationship model between the position information and the brightness compensation value, and the brightness compensation model includes a brightness compensation model table.

[0092] Optionally, the position information further includes pixel position information corresponding to the data signal currently transmitted by the data line; the data signal compensation module is specifically configured to determine the transmission impedance of the data line according to the pixel position information and the data line impedance model; determine the transmission impedance of the border circuit corresponding to the data line according to the serial number information and the border circuit impedance model; and look up the corresponding brightness compensation value from the brightness compensation model table according to the transmission impedance of the data line corresponding to the data line and the transmission impedance of the border circuit.

[0093] The brightness adjustment device of the display panel provided by the embodiments of the present invention has corresponding beneficial effects with the brightness adjustment method of the display panel provided by any embodiment of the present invention. The technical details not elaborated in this embodiment are elaborated in the brightness adjustment method of the display panel provided by any embodiment of the present invention.

[0094] The embodiments of the present invention further provide a display device, which includes a driving chip and a display panel. The driving chip is configured to execute the brightness compensation method provided by any embodiment of the present invention to perform brightness compensation on the display panel.

[0095] Specifically, the driving chip includes a data signal generation module.

[0096] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0097] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A brightness compensation method for a display panel, characterized in that, Including: Obtaining the position information of the data line in the display panel; wherein, the position information includes the serial number information of the data lines arranged along a set direction; the serial number information represents the position of the border circuit corresponding to the data line; the border circuit is used to connect the data line and the data signal generation module, and the transmission impedance of the border circuit is different due to different positions; According to the position information, determining the data signal input to the data line by using a brightness compensation model; wherein, the brightness compensation model establishes a relationship model between the position information and the brightness compensation value, and the brightness compensation model includes a brightness compensation model table; The border circuit at least includes: a multiplexing circuit; wherein, the transmission impedance of the multiplexing circuits at different positions is different; the brightness compensation model table establishes a relationship model between the transmission impedance of the multiplexing circuit and the brightness compensation value.

2. The brightness compensation method according to claim 1, wherein The position information further includes the pixel position information corresponding to the data signal currently transmitted by the data line; The brightness compensation model includes a border circuit impedance model, a data line impedance model, and a brightness compensation model table; the determining of the data signal input to the data line according to the position information and the brightness compensation model specifically includes: Determining the transmission impedance of the data line according to the pixel position information and the data line impedance model; Determining the transmission impedance of the border circuit corresponding to the data line according to the serial number information and the border circuit impedance model; Looking up the corresponding brightness compensation value from the brightness compensation model table according to the transmission impedance of the data line corresponding to the data line and the transmission impedance of the border circuit.

3. The brightness compensation method according to claim 2, wherein The border circuit further includes fan-out region traces; the fan-out region traces are used to transmit the data signal to the data line, and the transmission impedance of the fan-out region traces at different positions is different; the brightness compensation model table establishes a relationship model between the transmission impedance of the fan-out region traces and the brightness compensation value.

4. The brightness compensation method according to claim 3, wherein The brightness compensation model table establishes a relationship model between the comprehensive transmission impedance of the multiplexing circuit and the fan-out region traces and the brightness compensation value.

5. The brightness compensation method according to claim 3, wherein The border circuit impedance model includes a first impedance sub-model corresponding to the multiplexing circuit and a second impedance sub-model corresponding to the fan-out region traces; The determining of the transmission impedance of the border circuit corresponding to the data line according to the serial number information and the border circuit impedance model specifically includes: Determining the transmission impedance of the multiplexing traces corresponding to the data line according to the serial number information and the first impedance sub-model; Determining the transmission impedance of the fan-out region traces corresponding to the data line according to the serial number information and the second impedance sub-model.

6. The brightness compensation method according to claim 2, wherein The brightness compensation model establishes a relationship model between the comprehensive serial number information, the pixel position information and the brightness compensation value.

7. The brightness compensation method according to claim 2 or 5, characterized in that, The brightness compensation value is the compensated data signal; or, the brightness compensation value is a compensation coefficient; The data signal after brightness compensation is determined by the compensation coefficient and the data signal before brightness compensation.

8. The brightness compensation method according to claim 2 or 5, characterized in that, The brightness compensation value represents the driving force of the data signal; or, the brightness compensation value represents the voltage of the data signal.

9. The brightness compensation method according to claim 1, wherein Before determining the data signal input to the data line by using the brightness compensation model, the following steps are further included: Establish the brightness compensation model; the input of the brightness compensation model is the position information, and the output of the brightness compensation model is the data signal.

10. The brightness compensation method according to claim 9, wherein The obtaining step of the brightness compensation model is executed before the display panel leaves the factory; the brightness compensation model matches different display panels.

11. A brightness compensation device for a display panel, characterized in that, It includes: A position information acquisition module, configured to acquire the position information of the data line in the display panel; wherein, the position information includes the serial number information of the data lines arranged along a set direction; the serial number information represents the position of the border circuit corresponding to the data line; the border circuit is used to connect the data line and the data signal generation module, and the transmission impedance of the border circuit is different when its position is different; A data signal compensation module, configured to determine the data signal input to the data line by using the brightness compensation model according to the position information; wherein, the brightness compensation model establishes a relationship model between the position information and the brightness compensation value, and the brightness compensation model includes a brightness compensation model table; The border circuit at least includes: a multiplexing circuit; wherein, the transmission impedance of the multiplexing circuits at different positions is different; the brightness compensation model table establishes a relationship model between the transmission impedance of the multiplexing circuit and the brightness compensation value.

12. A display device, characterized in that, It includes a driving chip and a display panel, and the driving chip is configured to execute the brightness compensation method according to any one of claims 1-10 to perform brightness compensation on the display panel.

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