CN115083369B - Display panel brightness compensation method and device, chip and display device - Google Patents
Display panel brightness compensation method and device, chip and display device Download PDFInfo
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- CN115083369B CN115083369B CN202210901281.2A CN202210901281A CN115083369B CN 115083369 B CN115083369 B CN 115083369B CN 202210901281 A CN202210901281 A CN 202210901281A CN 115083369 B CN115083369 B CN 115083369B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The embodiment of the application provides a brightness compensation method and device of a display panel, a chip and a display device, wherein the compensation method of the display panel comprises the following steps: correspondingly equivalent n fan-out wires to n fan-out resistance values, and determining a reference compensation value according to the n fan-out resistance values; then determining the resistance value after compensation of each first fan-out wiring according to the 1 st fan-out resistance value, the n2 nd fan-out resistance value, the reference compensation value and the serial numbers of the first fan-out wirings, and determining the resistance value after compensation of each second fan-out wiring according to the n2+1 th fan-out resistance value, the n th fan-out resistance value, the reference compensation value and the serial numbers of the second fan-out wirings; and then, compensating the corresponding pixel voltage according to the resistance value after the compensation of each first fan-out wiring and the resistance value after the compensation of each second fan-out wiring. The embodiment of the application can ensure that the display brightness of different areas is consistent, thereby effectively improving the V-Block defect and improving the display effect.
Description
Technical Field
The application relates to the technical field of display, in particular to a brightness compensation method and device of a display panel, a chip and a display device.
Background
On the one hand, TV products are increasingly moving towards high resolution, high refresh rates, 4K, 8K display products, or 144Hz (hertz), 288Hz, 576Hz display products. On the other hand, in order to reduce the cost, the share of display products of Dual-Gate and Tri-Gate pixel architectures in the market is also increasing. Both of these trends face the problem of reduced charge time and lower charge rate.
The Fan-out wiring lengths between different channels at the Panel end are different, and the Fan-out resistances corresponding to the Fan-out wiring lengths of the different channels are also different, namely, the Fan-out resistances corresponding to the Fan-out resistances of the different Fan-out wirings are different, so that the charging time of each channel to the pixels is inconsistent. Under the condition of sufficient charging rate, the smaller fan-out resistor can be ignored, and no image quality problem exists, but when the charging rate is lower or the fan-out resistor is larger, the charging time of each channel is inconsistent, so that the display brightness of different areas is also inconsistent.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides a brightness compensation method, a device, a chip and a display device of a display panel, which are used for solving the technical problem that the display brightness of different areas is inconsistent due to inconsistent charging time of each channel when the charging rate is low or the fan-out resistance is large in the prior art.
In a first aspect, an embodiment of the present application provides a brightness compensation method for a display panel, where the display panel includes a display area and a peripheral area located at least one side of the display area, the peripheral area includes at least one fan-out area, the fan-out area includes n fan-out wires, and the brightness compensation method includes:
Corresponding n fan-out wires to n fan-out resistance values, determining a reference compensation value according to the n fan-out resistance values, wherein n is a positive integer;
According to the 1 st fan-out resistance value The fan-out resistor resistance value, the reference compensation value and the serial numbers of the first fan-out wires, the resistance value of each first fan-out wire after compensation is determined, and according to the firstThe fan-out resistor resistance, the nth fan-out resistor resistance, the reference compensation value and the serial numbers of the second fan-out wires are used for determining the resistance after compensation of each second fan-out wire; the first fan-out wiring is numbered from 1 to numberFan-out wiring of (2), the second fan-out wiring is the number slaveFan-out trace to number n;
Compensating the corresponding pixel voltage according to the resistance value of each first fan-out wiring after compensation and the equivalent fan-out resistance value of each first fan-out wiring; and compensating the corresponding pixel voltage according to the resistance value of each second fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each second fan-out wiring.
In one possible implementation, determining the reference compensation value according to the n fan-out resistor values includes:
according to the 1 st fan-out resistance value and the 1 st Determining fan-out resistor resistance values and a first sub-reference compensation value;
according to the first The fan-out resistance and the nth fan-out resistance determine a second sub-standard compensation value;
Determining a first compensation value according to the first sub-reference compensation value and the second sub-reference compensation value;
based on the first fanout wiring with the number of 1 and the number of Time difference of signals received by the first outgoing line of (a), or based on the numberThe time difference of signals received by the second outgoing line and the second outgoing line with the number n is used for determining a second compensation value;
and determining a reference compensation value according to the first compensation value and the second compensation value.
In one possible implementation, the fan-out resistor resistance according to 1 st and the secondDetermining a first sub-compensation value from fan-out resistor values, comprising: resistance value of fan-out resistance 1 andSubtracting the fan-out resistor resistance values to obtain a first sub-reference compensation value;
and according to the nth fan-out resistance and the nth Determining a second sub-compensation value from the fan-out resistor resistance values, comprising: sum of the nth fan-out resistance valueSubtracting the fan-out resistor resistance values to obtain a second sub-reference compensation value;
And determining a first compensation value based on the first sub-reference compensation value and the second sub-reference compensation value, comprising: and rounding or averaging the first sub-standard compensation value and the second sub-standard compensation value to obtain a first compensation value.
In one possible implementation, determining the reference compensation value from the first compensation value and the second compensation value includes:
and subtracting the first compensation value from the second compensation value to obtain a reference compensation value.
In one possible implementation, determining the reference compensation value according to the n fan-out resistor values includes:
according to the 1 st fan-out resistance value and the 1 st Determining fan-out resistor resistance values and a first sub-reference compensation value;
According to the nth fan-out resistance value and the nth Determining a second sub-compensation value by fan-out resistor resistance values;
a reference compensation value is determined based on the first sub-reference compensation value and the second sub-reference compensation value.
In one possible implementation, the fan-out resistor resistance according to 1 st and the secondDetermining a first sub-compensation value from fan-out resistor values, comprising: resistance value of fan-out resistance 1 andSubtracting the fan-out resistor resistance values to obtain a first sub-reference compensation value;
and according to the nth fan-out resistance and the nth Determining a second sub-compensation value from the fan-out resistor resistance values, comprising: sum of the nth fan-out resistance valueSubtracting the fan-out resistor resistance values to obtain a second sub-reference compensation value;
And determining a reference compensation value from the first sub-reference compensation value and the second sub-reference compensation value, comprising: and rounding or averaging the first sub-reference compensation value and the second sub-reference compensation value to obtain a reference compensation value.
In one possible implementation manner, compensating the corresponding pixel voltage according to the resistance value after compensation of each first fan-out line and the fan-out resistance value corresponding to the equivalent of each first fan-out line includes:
Determining the compensation value of each first fan-out wiring according to the resistance value of each first fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each first fan-out wiring;
And based on the compensation value of each first fan-out line, delaying receiving signals transmitted to corresponding pixels so as to compensate the corresponding pixel voltages.
And compensating the corresponding pixel voltage according to the resistance value after the compensation of each second fan-out wiring and the fan-out resistance value corresponding to the equivalent of each second fan-out wiring, comprising:
determining the compensation value of each second fan-out wiring according to the resistance value of each second fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each second fan-out wiring;
And based on the compensation value of each second fanout line, delaying receiving signals transmitted to corresponding pixels so as to compensate the corresponding pixel voltages.
In one possible implementation manner, determining the compensation value of each first fan-out line according to the compensated resistance value of each first fan-out line and the equivalent fan-out resistance value corresponding to each first fan-out line includes: subtracting the resistance value of the first fan-out wiring after compensation from the equivalent fan-out resistance value of the first fan-out wiring to obtain a compensation value of each first fan-out wiring;
And determining a compensation value of each second outgoing line according to the compensated resistance value of each second outgoing line and the equivalent fan-out resistance value of each second outgoing line, including: and subtracting the resistance value of the second fan-out wiring after compensation from the equivalent fan-out resistance value of the second fan-out wiring to obtain the compensation value of each second fan-out wiring.
In a second aspect, an embodiment of the present application provides a brightness compensation device for a display panel, including:
The reference compensation value determining module is used for correspondingly and equivalently converting the n fan-out wires into n fan-out resistor resistance values, determining a reference compensation value according to the n fan-out resistor resistance values, wherein n is a positive integer;
The resistance value determining module is used for determining the resistance value and the first fan-out resistance value according to the 1 st fan-out resistance The fan-out resistor resistance value, the reference compensation value and the serial numbers of the first fan-out wires, the resistance value of each first fan-out wire after compensation is determined, and according to the firstThe fan-out resistor resistance, the nth fan-out resistor resistance, the reference compensation value and the serial numbers of the second fan-out wires are used for determining the resistance after compensation of each second fan-out wire; the first fan-out wiring is numbered from 1 to numberFan-out wiring of (2), the second fan-out wiring is the number slaveFan-out trace to number n;
The compensation module is used for compensating corresponding pixel voltages according to the resistance value of each first fan-out wiring after compensation and the fan-out resistance value corresponding to each first fan-out wiring; and compensating the corresponding pixel voltage according to the resistance value of each second fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each second fan-out wiring.
In one possible implementation, the reference compensation value determining module is further configured to determine the fan-out resistance value according to the 1 st fan-out resistance value and the 1 st fan-out resistance valueDetermining fan-out resistor resistance values and a first sub-reference compensation value; according to the first The fan-out resistance and the nth fan-out resistance determine a second sub-standard compensation value; determining a first compensation value according to the first sub-reference compensation value and the second sub-reference compensation value; based on the first fanout wiring with the number of 1 and the number ofTime difference of signals received by the first outgoing line of (a), or based on the numberThe time difference of signals received by the second outgoing line and the second outgoing line with the number n is used for determining a second compensation value; and determining a reference compensation value according to the first compensation value and the second compensation value.
In a third aspect, an embodiment of the present application provides a brightness compensation chip of a display panel, including:
A memory;
A processor electrically connected to the memory;
The memory stores a computer program that is executed by the processor to implement the brightness compensation method of the display panel as in the first aspect.
In a fourth aspect, embodiments of the present application provide a display device including a display panel electrically connected to a brightness compensation chip as in the second aspect.
The technical scheme provided by the embodiment of the application has the beneficial technical effects that:
according to the brightness compensation method of the display panel, provided by the embodiment of the application, the nonlinear condition of the equivalent fan-out resistor part corresponding to different fan-out wires at the display panel end is considered, and the 1 st fan-out resistor resistance value are adopted The fan-out resistor resistance value, the reference compensation value and the serial numbers of the first fan-out wires, the resistance value of each first fan-out wire after compensation is determined, and according to the firstThe fan-out resistor resistance, the nth fan-out resistor resistance, the reference compensation value and the serial numbers of the second fan-out wires are determined, the resistance after compensation of each second fan-out wire can enable the fan-out wires to correspond to the equivalent fan-out resistor linear distribution, and then corresponding pixel voltages are compensated according to the resistance after compensation of each first fan-out wire and the equivalent fan-out resistor resistance corresponding to each first fan-out wire; and compensating corresponding pixel voltages according to the resistance value of each second outgoing line after compensation and the fan-out resistance value of each second outgoing line corresponding to the equivalent fan-out resistance value, so that charging time of each channel is consistent, display brightness of different areas is consistent, V-Block defect can be effectively improved, and display effect is improved.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a display device according to the prior art;
FIG. 2 is a schematic diagram of the V-Block phenomenon in the prior art;
FIG. 3a is a schematic diagram showing fan-out resistance values of each channel at the display panel end;
FIG. 3b is a schematic diagram of compensation values of channels at the display panel end according to the conventional scheme;
FIG. 3c is a schematic diagram of the resistance values of the compensated channels according to the conventional scheme;
fig. 4 is a flowchart of a brightness compensation method of a display panel according to an embodiment of the present application;
FIG. 5 is a flowchart illustrating a method for determining a reference compensation value according to an embodiment of the present application;
FIG. 6a is a schematic diagram of fan-out resistance values of each channel at the display panel according to an embodiment of the present application;
FIG. 6b is a schematic diagram of compensation values of channels at a display panel according to an embodiment of the present application;
FIG. 6c is a schematic diagram of the resistance values of the compensated channels according to the embodiment of the present application;
Fig. 7 is a schematic diagram of a brightness compensation method of a display panel according to an embodiment of the application;
fig. 8 is a schematic structural diagram of a brightness compensation device of a display panel according to an embodiment of the application.
Reference numerals:
100-display panel, 10-fan-out area;
200-source driving module;
300-drive circuit board.
Detailed Description
The present application is described in detail below, examples of embodiments of the application are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. Further, if detailed description of the known technology is not necessary for the illustrated features of the present application, it will be omitted. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
The inventor of the application researches and discovers that the traditional improvement scheme is to directly perform linear distribution among channels according to compensation values by a source driving module according to Fan-out resistance differences corresponding to Fan-out wires of different channels at a Panel (display Panel), so that the equal resistance design of the Fan-out wires after compensation can be basically realized. However, the delay time of the signal output of each channel in the source driving module is not considered, and the non-linearization condition of the Fan-out resistor part corresponding to the Fan-out wires of different channels at the display panel end is not considered, so that the compensation effect may not reach the expected condition on some display products with more sensitive charging rate.
As shown in fig. 1, after the signal output from the source driving module 200 connected to the driving circuit board 300 reaches the display panel 100, the fan-out line connected to the middle channel of the source driving module 200 is shorter, and the channel connected to the edge portion is longer, and the area of the dashed box in fig. 1 is one fan-out area 10, because the fan-out line length of the fan-out area 10 of the display panel 100 is inconsistent. The length of the fanout line influences the time for the signal output by the source driving module 200 to reach the pixel, and the shorter the fanout line, the earlier the signal output by the source driving module 200 reaches, and the longer the charging time is. Under the condition of sufficient charging rate, the image quality problem does not exist, but when the charging rate is low or the fan-out resistance is large, the charging time of each channel is inconsistent, so that the display brightness of different areas is also inconsistent, and the phenomenon of V-Block appears in a macroscopic view, as shown in fig. 2, namely, the phenomenon that the brightness in the display area is also inconsistent due to the inconsistent pixel voltage of the display area corresponding to one source driving module.
The lengths of different Fan-out traces of the display panel can be equivalent to different resistance values, which are generally referred to as Fan-out resistors, as shown in table 1, and the number of signal channels of the source driving module 200 is 960, and the channels are connected to the Fan-out traces in a one-to-one correspondence. The fan-out wiring of the display panel has a certain rule corresponding to the equivalent fan-out resistance, and the general trend of R_1 to R_480 and R_960 to R_481 is gradually reduced, basically symmetrical, but not absolutely linear distribution, and the local nonlinear condition exists. The graph is shown in fig. 3 a. The abscissa in fig. 3a represents the channel and the ordinate represents the fan-out resistance value.
TABLE 1 Fan-out resistance values
| Channel | CH1 | CH2 | …… | CH480 | CH481 | …… | CH958 | CH959 | CH960 |
| Resistor | R1 | R2 | …… | R480 | R481 | …… | R958 | R959 | R960 |
As can be seen from table 1, the difference between the resistances of CH480 and CH1 is R 1-R480, the difference between the resistances of CH481 and CH960 is R 960-R481, and the difference between the two results is generally small, and the two results can be directly rounded or averaged to be used as the reference compensation value Rm. The conventional compensation scheme is to directly divide Rm into equal compensation resistance values (i.e., compensation values), and uniformly compensate the values to each channel, wherein the compensation values obtained by each channel are shown in table 2. The plotted curve is shown in fig. 3 b.
TABLE 2 Compensation values based on Fan-out resistance in the conventional
As can be seen from table 2, the resistance value of each channel obtained after compensation fluctuates to some extent, which is applicable to some situations where the charging rate requirement is not too high. According to the method, the source electrode driving modules are directly distributed linearly among the channels according to the reference compensation value Rm, the left and right symmetry is achieved, the equal resistance value design of the compensated channels can be basically achieved, however, the method does not consider the delay influence of output signals among different output channels of the source electrode driving modules, does not consider the local nonlinear condition of equivalent fan-out resistors corresponding to different fan-out wires at the display panel end, and weakens the compensation effect. The compensated result obtained with this method is shown in fig. 3 c.
The application provides a brightness compensation method, a device, a chip and a display device of a display panel, and aims to solve the technical problem that display brightness of different areas is inconsistent due to inconsistent charging time of each channel when charging rate is low or fan-out resistance is large in the prior art.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments.
The embodiment of the application provides a brightness compensation method of a display panel, as shown in fig. 1, the display panel 100 includes a display area and a peripheral area located at least one side of the display area, the peripheral area includes at least one fan-out area 10, the fan-out area 10 includes n fan-out wires, the n fan-out wires are connected with n channels of a source driving module 200 in a one-to-one correspondence manner, and the source driving module 200 outputs signals to the n fan-out wires through the n channels, so as to realize image display of the display panel 100. As shown in fig. 4, the brightness compensation method includes:
S1, correspondingly and equivalently converting n fan-out wires into n fan-out resistor resistance values, determining a reference compensation value according to the n fan-out resistor resistance values, wherein n is a positive integer;
s2, according to the 1 st fan-out resistance value The fan-out resistor resistance value, the reference compensation value and the serial numbers of the first fan-out wires, the resistance value of each first fan-out wire after compensation is determined, and according to the first The fan-out resistor resistance, the nth fan-out resistor resistance, the reference compensation value and the serial numbers of the second fan-out wires are used for determining the resistance after compensation of each second fan-out wire; the first fan-out wiring is numbered from 1 to numberFan-out wiring of (2), the second fan-out wiring is the number slaveFan-out trace to number n;
S3, compensating corresponding pixel voltages according to the resistance value of each first fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each first fan-out wiring; and compensating the corresponding pixel voltage according to the resistance value of each second fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each second fan-out wiring.
According to the brightness compensation method of the display panel, provided by the embodiment of the application, the nonlinear condition of the equivalent fan-out resistor part corresponding to different fan-out wires at the display panel end is considered, and the 1 st fan-out resistor resistance value are adoptedThe fan-out resistor resistance value, the reference compensation value and the serial numbers of the first fan-out wires, the resistance value of each first fan-out wire after compensation is determined, and according to the firstThe fan-out resistor resistance, the nth fan-out resistor resistance, the reference compensation value and the serial numbers of the second fan-out wires are determined, the resistance after compensation of each second fan-out wire can enable the fan-out wires to correspond to the equivalent fan-out resistor linear distribution, and then corresponding pixel voltages are compensated according to the resistance after compensation of each first fan-out wire and the equivalent fan-out resistor resistance corresponding to each first fan-out wire; and compensating corresponding pixel voltages according to the resistance value of each second outgoing line after compensation and the fan-out resistance value of each second outgoing line corresponding to the equivalent fan-out resistance value, so that charging time of each channel is consistent, display brightness of different areas is consistent, V-Block defect can be effectively improved, and display effect is improved.
In some embodiments, as shown in fig. 5, determining the reference compensation value from the n fan-out resistor values includes:
s11, according to the 1 st fan-out resistance and the 1 st fan-out resistance Determining fan-out resistor resistance values and a first sub-reference compensation value;
S12 according to the first The fan-out resistance and the nth fan-out resistance determine a second sub-standard compensation value;
s13, determining a first compensation value according to the first sub-reference compensation value and the second sub-reference compensation value;
s14, based on the first fanout wiring with the number of 1 and the number of 1 Time difference of signals received by the first outgoing line of (a), or based on the numberThe time difference of signals received by the second outgoing line and the second outgoing line with the number n is used for determining a second compensation value;
And S15, determining a reference compensation value according to the first compensation value and the second compensation value.
The brightness compensation method of the display panel provided by the embodiment of the application is based on the first fanout wiring with the number of 1 and the first fanout wiring with the number of 1 in consideration of the delay influence of output signals among different output channels of the source electrode driving moduleTime difference of signals received by the first outgoing line of (a), or based on the numberThe second compensation value is determined according to the time difference between the signals received by the second fan-out wiring and the second fan-out wiring with the number n, and then the reference compensation value is determined according to the first compensation value and the second compensation value.
In some embodiments, according to fanout resistance value 1 andDetermining a first sub-compensation value from fan-out resistor values, comprising: resistance value of fan-out resistance 1 andSubtracting the fan-out resistor resistance values to obtain a first sub-reference compensation value;
and according to the nth fan-out resistance and the nth Determining a second sub-compensation value from the fan-out resistor resistance values, comprising: sum of the nth fan-out resistance valueSubtracting the fan-out resistor resistance values to obtain a second sub-reference compensation value;
And determining a first compensation value based on the first sub-reference compensation value and the second sub-reference compensation value, comprising: and rounding or averaging the first sub-standard compensation value and the second sub-standard compensation value to obtain a first compensation value.
In some embodiments, determining the reference compensation value from the first compensation value and the second compensation value comprises: and subtracting the first compensation value from the second compensation value to obtain a reference compensation value.
In some embodiments, compensating the corresponding pixel voltage according to the compensated resistance value of each first fan-out line and the corresponding equivalent fan-out resistance value of each first fan-out line includes:
Determining the compensation value of each first fan-out wiring according to the resistance value of each first fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each first fan-out wiring;
And based on the compensation value of each first fan-out line, delaying receiving signals transmitted to corresponding pixels so as to compensate the corresponding pixel voltages.
And compensating the corresponding pixel voltage according to the resistance value after the compensation of each second fan-out wiring and the fan-out resistance value corresponding to the equivalent of each second fan-out wiring, comprising:
determining the compensation value of each second fan-out wiring according to the resistance value of each second fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each second fan-out wiring;
And based on the compensation value of each second fanout line, delaying receiving signals transmitted to corresponding pixels so as to compensate the corresponding pixel voltages.
In some embodiments, determining the compensation value of each first fan-out line according to the compensated resistance value of each first fan-out line and the equivalent fan-out resistance value of each first fan-out line, includes: subtracting the resistance value of the first fan-out wiring after compensation from the equivalent fan-out resistance value of the first fan-out wiring to obtain a compensation value of each first fan-out wiring;
And determining a compensation value of each second outgoing line according to the compensated resistance value of each second outgoing line and the equivalent fan-out resistance value of each second outgoing line, including: and subtracting the resistance value of the second fan-out wiring after compensation from the equivalent fan-out resistance value of the second fan-out wiring to obtain the compensation value of each second fan-out wiring.
In a specific embodiment, a method for compensating brightness of a display panel according to an embodiment of the present application is described in detail.
First, a reference compensation value is determined: the reference compensation value Rm (i.e., the first compensation value of the embodiment of the present application) can be obtained through the above description, and in addition, the embodiment of the present application also takes into consideration the effect of the output Delay between the channels of the source driving module 200. When the source driving module 200 is designed, if the source driving module 200 outputs signals at the same time, the signal energy is high, electromagnetic radiation is increased, that is, EMI (Electromagnetic Interference ) is greatly affected, so that the source driving module 200 staggers the time of outputting signals of the channels. Typically, the middle channel output signal is 45-80 ns (nanoseconds) later in time than the edge channel output signal. Through simulation, we equivalent the delay of this period of time to the resistance Rn (i.e., the second compensation value of the embodiment of the present application). The first compensation value Rm and the second compensation value Rn are subtracted to obtain a reference compensation value Rm-Rn.
Secondly, determining the resistance value of each first fan-out wiring after compensation and determining the resistance value of each second fan-out wiring after compensation: unlike the conventional scheme, the embodiment of the application does not directly distribute the reference compensation values Rm-Rn to each channel, but calculates the compensation values of each channel according to the compensated resistance values and the reverse directions. Taking n=960 as an example, 960 fan-out wires are correspondingly connected with 960 channels and are sequentially arranged. As can be seen in fig. 1, the fan-out traces connected by the intermediate channels (e.g., CH480, CH 481) are shorter in length and the fan-out traces connected by the channels closer to the edge portions (e.g., CH1, CH 960) are longer. The specific implementation is as follows:
And calculating the equivalent fan-out resistance value corresponding to the fan-out wires connected with the channels at the display panel end as R i(1≤i≤480),Rj (481 is less than or equal to j is less than or equal to 960), determining the compensated resistance value of each first fan-out wire (the fan-out wires correspondingly connected with CH 1-CH 480), and determining the compensated resistance value of each second fan-out wire (the fan-out wires correspondingly connected with CH 481-CH 960).
1.1, Setting CH1 and CH960 compensation resistors (namely compensation values) to 0, setting CH480 and CH481 compensation resistors (namely compensation values) to Rm-Rn, calculating that the resistance after compensation of a first fan-out wiring connected with CH1 is R 1, the resistance after compensation of a first fan-out wiring connected with CH480 is R 480 +Rm-Rn, the resistance after compensation of a second fan-out wiring connected with CH481 is R 481 +Rm-Rn, and the resistance after compensation of a second fan-out wiring connected with CH960 is R 960;
1.2, calculating a resistance value R' i after the first fan-out wiring compensation connected with each channel according to the resistance values after the first fan-out wiring compensation connected with CH1 and CH480 respectively;
1.3, calculating a resistance value R' j after the second fan-out wiring compensation connected with each channel according to the resistance values after the second fan-out wiring compensation connected with CH481 and CH960 respectively;
Again, a compensation value R "i for each first fanout trace is determined and a compensation value R" j for each second fanout trace is determined:
According to the equivalent fan-out resistance R i corresponding to the fan-out wiring connected with each channel at the display panel end and the resistance R ' i、R′j after compensation of each channel, calculating the compensation values R ' i and R ' j of the fan-out wiring connected with the corresponding channel;
R' i＝R′i-Ri (1.ltoreq.i.ltoreq.480) expression (3)
R' j＝R′j-Rj (481. Ltoreq.j. Ltoreq.960) expression (4)
So far, the compensation value calculation of each channel of the source electrode driving module is completed. After compensation is realized by adopting the compensation value calculated by the method, the resistance value of the fan-out wiring connected with each channel is linearly distributed, so that the V-Block defect is effectively reduced.
Finally, the source driving module outputs the compensation value R ' i of each first fan-out wiring and the compensation value R ' j of each second fan-out wiring to the corresponding fan-out wiring in a delayed manner through each channel, and transmits the compensation value R ' i of each first fan-out wiring to the corresponding pixel through the corresponding fan-out wiring, so that the corresponding pixel voltage is compensated, the charging time of each channel is consistent, the display brightness of different areas is consistent, V-Block defects can be effectively improved, and the display effect is improved.
For ease of understanding, the manner of calculation is further illustrated below.
Firstly, fan-out resistance values of fan-out wires corresponding to and connected with channels at a certain display panel end are obtained, namely the fan-out wires can be equivalent to the fan-out resistance values according to the lengths of the fan-out wires, as shown in table 3, and a curve is drawn as shown in fig. 6 a. The difference in resistance between CH480 and CH1 was calculated to be 697.9 ohms and the difference in resistance between CH960 and CH481 was calculated to be 697.87 ohms. Thus, rounding 697.9 ohms and 697.87 ohms yields a first compensation value Rm, i.e., the first compensation value Rm is set to rm=698 ohms.
TABLE 3 fan-out resistance values of channels at a display panel
| Channel | CH1 | CH2 | …… | CH480 | CH481 | …… | CH958 | CH959 | CH960 |
| Resistor | 1578.62 | 1578.54 | …… | 880.719 | 880.713 | …… | 1575.14 | 1578.48 | 1578.59 |
According to the source driving module attribute, the Delay time of the middle channel and the edge channel of the source driving module is 45ns (nanosecond), and the Delay time of 45ns is equivalent to resistance rn=28 ohm (namely the second compensation value) through Mask software simulation. Therefore, the first compensation value Rm and the second compensation value Rn are subtracted to obtain a reference compensation value Rm-Rn, i.e., the reference compensation value Rm-rn=670 ohms.
Secondly, the resistance value after the first fan-out wiring compensation of the CH480 connection is calculated to be 880.719+670= 1550.719 ohms, and the CH1 compensation value is calculated to be 0, so that the resistance value after the CH1 compensation is still 1578.62 ohms. From this, according to expression (1), the resistance after the first fan-out wiring compensation of each channel connection is calculated as:
The resistance after compensation of the second fanout trace connected with CH481 is calculated to be 880.713+670= 1550.713 ohms, and the compensation value of CH960 is calculated to be 0, so that the resistance after compensation of CH960 is still 1578.59 ohms. From this, according to expression (2), the resistance after the second fan-out wiring compensation of each channel connection is calculated as:
The compensated resistance of the fan-out traces for each channel connection is shown in table 4.
TABLE 4 resistance after Compensation of each channel
| Channel | CH1 | CH2 | …… | CH480 | CH481 | …… | CH958 | CH959 | CH960 |
| Resistor | 1578.62 | 1578.57 | …… | 1550.71 | 1550.72 | …… | 1578.48 | 1578.53 | 1578.59 |
And calculating compensation values required by each channel of the source driving module according to the expression (3) and the expression (4). The calculation results are shown in Table 5. The plotted curve is shown in fig. 6 b. In practice, the resistance values (i.e., compensation values) of the compensation resistors shown in fig. 6b will be loaded inside the source driving module.
TABLE 5 Compensation values for channels of Source driver Module
| Channel | CH1 | CH2 | …… | CH480 | CH481 | …… | CH958 | CH959 | CH960 |
| Resistor | 0 | 0.03 | …… | 670 | 670 | …… | 3.34 | 0.05 | 0 |
The compensation result is the sum of the fan-out resistance value of each channel at the display panel end and the compensation value of each channel of the source electrode driving module, and a curve is drawn as shown in fig. 6c, and as can be seen from fig. 6c, the compensated resistance values are in linear distribution.
The brightness compensation method of the display panel provided by the embodiment of the application considers the signal output delay time among all channels in the source electrode driving module, equivalent the delay time into a certain resistance value, reversely calculates the compensation resistance (compensation value) needed by all channels according to the result of compensating the middle channels CH480 and CH481 with the first channel CH1 and the last channel CH960 as a reference (taking the total channel number as 960 as an example here), and can realize linear distribution of the resistance values of all channels after compensation, thereby effectively improving V-Block defect. The display panel brightness compensation method provided by the embodiment of the application can be applied to display products of Dual-Gate and Tri-Gate pixel architectures, and effectively improves V-Block defects.
As shown in fig. 7, the source driving module delays outputting the compensation value R "i of each first fan-out trace and the compensation value R" j of each second fan-out trace to the corresponding fan-out trace through each channel, and transmits the delayed output value to the corresponding pixel through the corresponding fan-out trace to compensate the corresponding pixel voltage, so that the charging time of each channel is consistent, the display brightness of different areas is consistent, the V-Block defect can be effectively improved, and the display effect is improved.
In some embodiments, determining the baseline compensation value from the n fan-out resistor values includes:
according to the 1 st fan-out resistance value and the 1 st Determining fan-out resistor resistance values and a first sub-reference compensation value;
According to the nth fan-out resistance value and the nth Determining a second sub-compensation value by fan-out resistor resistance values;
a reference compensation value is determined based on the first sub-reference compensation value and the second sub-reference compensation value.
In some embodiments, according to fanout resistance value 1 andDetermining a first sub-compensation value from fan-out resistor values, comprising: resistance value of fan-out resistance 1 andSubtracting the fan-out resistor resistance values to obtain a first sub-reference compensation value;
and according to the nth fan-out resistance and the nth Determining a second sub-compensation value from the fan-out resistor resistance values, comprising: sum of the nth fan-out resistance valueSubtracting the fan-out resistor resistance values to obtain a second sub-reference compensation value;
And determining a reference compensation value from the first sub-reference compensation value and the second sub-reference compensation value, comprising: and rounding or averaging the first sub-reference compensation value and the second sub-reference compensation value to obtain a reference compensation value.
Based on the same inventive concept, as shown in fig. 8, an embodiment of the present application provides a brightness compensation device of a display panel, including:
the reference compensation value determining module 10 is configured to correspondingly and equivalently convert the n fan-out wires into n fan-out resistance values, and determine a reference compensation value according to the n fan-out resistance values, where n is a positive integer;
a resistance determining module 20 for determining the fan-out resistance according to the 1 st fan-out resistance The fan-out resistor resistance value, the reference compensation value and the serial numbers of the first fan-out wires, the resistance value of each first fan-out wire after compensation is determined, and according to the firstThe fan-out resistor resistance, the nth fan-out resistor resistance, the reference compensation value and the serial numbers of the second fan-out wires are used for determining the resistance after compensation of each second fan-out wire; the first fan-out wiring is numbered from 1 to numberFan-out wiring of (2), the second fan-out wiring is the number slaveFan-out trace to number n;
the compensation module 30 is configured to compensate the corresponding pixel voltage according to the compensated resistance value of each first fanout line and the equivalent fanout resistance value corresponding to each first fanout line; and compensating the corresponding pixel voltage according to the resistance value of each second fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each second fan-out wiring.
The brightness compensation device for a display panel provided by the embodiment of the application has the same inventive concept and the same beneficial effects as those of the previous embodiments, and details not shown in the brightness compensation device for a display panel can refer to the previous embodiments, and are not repeated herein.
In some embodiments, the reference compensation value determination module 10 is further configured to determine the fan-out resistance value according to the 1 st fan-out resistance value and the 1 st fan-out resistance valueDetermining fan-out resistor resistance values and a first sub-reference compensation value; according to the firstThe fan-out resistance and the nth fan-out resistance determine a second sub-standard compensation value; determining a first compensation value according to the first sub-reference compensation value and the second sub-reference compensation value; based on the first fanout wiring with the number of 1 and the number ofTime difference of signals received by the first outgoing line of (a), or based on the numberThe time difference of signals received by the second outgoing line and the second outgoing line with the number n is used for determining a second compensation value; and determining a reference compensation value according to the first compensation value and the second compensation value.
Based on the same inventive concept, an embodiment of the present application provides a brightness compensation chip of a display panel, including:
A memory;
A processor electrically connected to the memory;
The memory stores a computer program that is executed by the processor to implement the brightness compensation method of the display panel provided in any one of the embodiments described above.
The brightness compensation chip of the display panel provided by the embodiment of the application has the same inventive concept and the same beneficial effects as those of the previous embodiments, and the content which is not shown in detail in the brightness compensation chip of the display panel can refer to the previous embodiments, and is not repeated here.
Based on the same inventive concept, an embodiment of the present application provides a display device including a display panel electrically connected with the brightness compensation chip provided in any one of the above embodiments.
The display device provided by the embodiment of the application has the same inventive concept and the same beneficial effects as the previous embodiments, and the content which is not shown in detail in the display device can refer to the previous embodiments, and is not repeated here.
By applying the embodiment of the application, at least the following beneficial effects can be realized:
(1) According to the brightness compensation method of the display panel, provided by the embodiment of the application, the nonlinear condition of the equivalent fan-out resistor part corresponding to different fan-out wires at the display panel end is considered, and the 1 st fan-out resistor resistance value are adopted The fan-out resistor resistance value, the reference compensation value and the serial numbers of the first fan-out wires, the resistance value of each first fan-out wire after compensation is determined, and according to the firstThe fan-out resistor resistance, the nth fan-out resistor resistance, the reference compensation value and the serial numbers of the second fan-out wires are determined, the resistance after compensation of each second fan-out wire can enable the fan-out wires to correspond to the equivalent fan-out resistor linear distribution, and then corresponding pixel voltages are compensated according to the resistance after compensation of each first fan-out wire and the equivalent fan-out resistor resistance corresponding to each first fan-out wire; and compensating corresponding pixel voltages according to the resistance value of each second outgoing line after compensation and the fan-out resistance value of each second outgoing line corresponding to the equivalent fan-out resistance value, so that charging time of each channel is consistent, display brightness of different areas is consistent, V-Block defect can be effectively improved, and display effect is improved.
(2) The brightness compensation method of the display panel provided by the embodiment of the application is based on the first fanout wiring with the number of 1 and the first fanout wiring with the number of 1 in consideration of the delay influence of output signals among different output channels of the source electrode driving moduleTime difference of signals received by the first outgoing line of (a), or based on the numberThe second compensation value is determined according to the time difference between the signals received by the second fan-out wiring and the second fan-out wiring with the number n, and then the reference compensation value is determined according to the first compensation value and the second compensation value.
Those of skill in the art will appreciate that the various operations, methods, steps in the flow, acts, schemes, and alternatives discussed in the present application may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed herein may be alternated, altered, rearranged, disassembled, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present application may also be alternated, altered, rearranged, decomposed, combined, or deleted.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the flowcharts of the figures may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily being sequential, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
The foregoing is only a partial embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present application, and such modifications and adaptations are intended to be comprehended within the scope of the present application.
Claims (12)
1. A brightness compensation method of a display panel, the display panel including a display area and a peripheral area located at least one side of the display area, the peripheral area including at least one fan-out area, the fan-out area including n fan-out wires, the brightness compensation method comprising:
Corresponding n fan-out wires to n fan-out resistance values, determining a reference compensation value according to the n fan-out resistance values, wherein n is a positive integer;
According to the 1 st fan-out resistance value The fan-out resistor resistance value, the reference compensation value and the serial numbers of the first fan-out wires, the resistance value of each first fan-out wire after compensation is determined, and according to the firstThe fan-out resistance, the nth fan-out resistance, the reference compensation value and the serial numbers of the second fan-out wires are determined, and the resistance after compensation of each second fan-out wire is determined; the first fan-out wiring is numbered from 1 to numberThe second fan-out wiring is the serial number slaveFan-out trace to number n;
Compensating the corresponding pixel voltage according to the resistance value of each first fan-out wiring after compensation and the equivalent fan-out resistance value of each first fan-out wiring; and compensating the corresponding pixel voltage according to the resistance value of each second fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each second fan-out wiring.
2. The method of claim 1, wherein determining a reference compensation value according to the n fan-out resistance values comprises:
according to the 1 st fan-out resistance value and the 1 st Determining fan-out resistor resistance values and a first sub-reference compensation value;
according to the first The fan-out resistance and the nth fan-out resistance determine a second sub-standard compensation value;
Determining a first compensation value according to the first sub-reference compensation value and the second sub-reference compensation value;
based on the first fanout wiring with the number of 1 and the number of Time difference of signals received by the first outgoing line of (a), or based on the numberThe time difference of signals received by the second outgoing line and the second outgoing line with the number n is used for determining a second compensation value;
And determining the reference compensation value according to the first compensation value and the second compensation value.
3. The method for compensating brightness of display panel according to claim 2, wherein,
The resistance value according to the 1 st fan-out resistor and the 1 st fan-out resistorDetermining a first sub-compensation value from fan-out resistor values, comprising: resistance value of fan-out resistance 1 andSubtracting the fan-out resistor resistance values to obtain a first sub-reference compensation value;
And, according to the nth fan-out resistance value and the nth Determining a second sub-compensation value from the fan-out resistor resistance values, comprising: sum of the nth fan-out resistance valueSubtracting the fan-out resistor resistance values to obtain a second sub-reference compensation value;
and determining a first compensation value from the first sub-reference compensation value and the second sub-reference compensation value, comprising: and rounding or averaging the first sub-standard compensation value and the second sub-standard compensation value to obtain the first compensation value.
4. The method of claim 2, wherein determining the reference compensation value according to the first compensation value and the second compensation value comprises:
And subtracting the first compensation value from the second compensation value to obtain the reference compensation value.
5. The method of claim 1, wherein determining a reference compensation value according to the n fan-out resistance values comprises:
according to the 1 st fan-out resistance value and the 1 st Determining fan-out resistor resistance values and a first sub-reference compensation value;
According to the nth fan-out resistance value and the nth Determining a second sub-compensation value by fan-out resistor resistance values;
And determining a reference compensation value according to the first sub-reference compensation value and the second sub-reference compensation value.
6. The method for compensating brightness of a display panel according to claim 5, wherein,
The resistance value according to the 1 st fan-out resistor and the 1 st fan-out resistorDetermining a first sub-compensation value from fan-out resistor values, comprising: resistance value of fan-out resistance 1 andSubtracting the fan-out resistor resistance values to obtain a first sub-reference compensation value;
And, according to the nth fan-out resistance value and the nth Determining a second sub-compensation value from the fan-out resistor resistance values, comprising: sum of the nth fan-out resistance valueSubtracting the fan-out resistor resistance values to obtain a second sub-reference compensation value;
And determining a reference compensation value from the first sub-reference compensation value and the second sub-reference compensation value, comprising: and rounding or averaging the first sub-reference compensation value and the second sub-reference compensation value to obtain the reference compensation value.
7. The method of claim 1, wherein compensating the corresponding pixel voltage according to the compensated resistance value of each first fan-out line and the equivalent fan-out resistance value of each first fan-out line, comprises:
Determining the compensation value of each first fan-out wiring according to the resistance value of each first fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each first fan-out wiring;
Delay receiving signals transmitted to corresponding pixels based on the compensation value of each first fan-out line so as to compensate corresponding pixel voltages;
And compensating the corresponding pixel voltage according to the compensated resistance value of each second fanout line and the equivalent fanout resistance value corresponding to each second fanout line, including:
determining the compensation value of each second fan-out wiring according to the resistance value of each second fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each second fan-out wiring;
And based on the compensation value of each second fanout line, delaying receiving signals transmitted to corresponding pixels so as to compensate the corresponding pixel voltages.
8. The method of claim 7, wherein determining the compensation value of each first fan-out line according to the compensated resistance value of each first fan-out line and the equivalent fan-out resistance value of each first fan-out line, comprises:
Subtracting the resistance value of the first fan-out wiring after compensation from the equivalent fan-out resistance value of the first fan-out wiring to obtain a compensation value of each first fan-out wiring;
and determining the compensation value of each second fan-out line according to the compensated resistance value of each second fan-out line and the equivalent fan-out resistance value corresponding to each second fan-out line, including:
And subtracting the resistance value of the second fan-out wiring after compensation from the equivalent fan-out resistance value of the second fan-out wiring to obtain the compensation value of each second fan-out wiring.
9. A brightness compensation device for a display panel, comprising:
The reference compensation value determining module is used for correspondingly and equivalently converting n fan-out wires into n fan-out resistance values, determining a reference compensation value according to the n fan-out resistance values, wherein n is a positive integer;
The resistance value determining module is used for determining the resistance value and the first fan-out resistance value according to the 1 st fan-out resistance The fan-out resistor resistance value, the reference compensation value and the serial numbers of the first fan-out wires, the resistance value of each first fan-out wire after compensation is determined, and according to the firstThe fan-out resistance, the nth fan-out resistance, the reference compensation value and the serial numbers of the second fan-out wires are determined, and the resistance after compensation of each second fan-out wire is determined; the first fan-out wiring is numbered from 1 to numberThe second fan-out wiring is the serial number slaveFan-out trace to number n;
The compensation module is used for compensating corresponding pixel voltages according to the resistance value of each first fan-out wiring after compensation and the fan-out resistance value corresponding to each first fan-out wiring; and compensating the corresponding pixel voltage according to the resistance value of each second fan-out wiring after compensation and the equivalent fan-out resistance value corresponding to each second fan-out wiring.
10. The brightness compensation device of claim 9, wherein,
The reference compensation value determining module is also used for determining the resistance value and the 1 st fan-out resistor according toDetermining fan-out resistor resistance values and a first sub-reference compensation value; according to the firstThe fan-out resistance and the nth fan-out resistance determine a second sub-standard compensation value; determining a first compensation value according to the first sub-reference compensation value and the second sub-reference compensation value; based on the first fanout wiring with the number of 1 and the number ofTime difference of signals received by the first outgoing line of (a), or based on the numberThe time difference of signals received by the second outgoing line and the second outgoing line with the number n is used for determining a second compensation value; and determining the reference compensation value according to the first compensation value and the second compensation value.
11. A brightness compensation chip of a display panel, comprising:
A memory;
a processor electrically connected to the memory;
The memory stores a computer program that is executed by the processor to implement the luminance compensation method of the display panel according to any one of claims 1 to 8.
12. A display device comprising an electrically connected display panel and the brightness compensation chip of claim 11.
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