CN111816120A - Display panel brightness compensation method and display panel - Google Patents
Display panel brightness compensation method and display panel Download PDFInfo
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- CN111816120A CN111816120A CN202010626286.XA CN202010626286A CN111816120A CN 111816120 A CN111816120 A CN 111816120A CN 202010626286 A CN202010626286 A CN 202010626286A CN 111816120 A CN111816120 A CN 111816120A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229920001621 AMOLED Polymers 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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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
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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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
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- General Physics & Mathematics (AREA)
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The display panel brightness compensation method comprises the following steps: providing a display panel comprising: a plurality of pixel units, each pixel unit being connected to a source line; and the source driver is connected with a plurality of source lines of the pixel units, an initial end of each source line is connected with the source driver, one tail end of at least two of the source lines is respectively connected with a test pad, and the test pads are used for measuring a tail end voltage of the tail ends of the source lines and comparing the tail end voltage with a preset voltage of the initial ends of the source lines, so that the preset voltage of the display panel is corrected according to the tail end voltage. A display panel is also provided.
Description
Field of the technology
The present disclosure relates to the field of display technologies, and in particular, to a method for compensating brightness of a display panel and a display panel.
Description of the background
Compared with a Liquid Crystal Display (LCD), an Active-matrix organic light-emitting diode (AMOLED) display has the unique advantage of self-luminescence, and continuous development and progress of display technologies of the AMOLED display brings rich large-size display products.
In a light emitting stage of a panel of a large-sized display, in a fan-out (fanout) region, a voltage input to a pixel cell near a scan driver is high with respect to a voltage input to a pixel cell at a position farther from the scan driver, for example, a last column of pixel cells. This causes a delay in the charging time of the pixel units far from the scan driver, which may result in insufficient charging time of the capacitors of the pixel units far from the scan driver, thereby causing brightness difference between the pixel units in different columns by the same source driver.
As shown in fig. 1, the length of the scan line 2 (the distance from the scan driver 3 to the pixel unit 401) in the middle portion of the fan-out (fanout) region 1 is the smallest, so that the delay time is the smallest and the influence of insufficient charging is the smallest; the length of the scan lines 2 (the distance from the scan driver 3 to the pixel unit 402) on both sides of the fan-out (fanout) region 1 is the largest, so that the delay time is the largest, and the influence of insufficient charging is also the largest. The display luminance at both sides of the scan driver 3 in the fan-out (fanout) region 1 is darker than that at the center. The phenomenon of the brightness difference is referred to as moire (mura). This may result in a reduction in the quality of the display picture, thereby adversely affecting the quality and display effect of the display.
The conventional solution is to use the scan driver to output data signals to the pixel units in different rows at different times, the scan driver will output data signals to the pixel units far away from the scan driver in the fanout (fanout) area first, and the pixel units near to the scan driver in the fanout (fanout) area will output data signals with a time difference. The problem that the brightness of the pixel unit closer to the scan driver in the fan-out (fanout) area is larger than that of the pixel unit far away from the scan driver in the fan-out (fanout) area is solved. However, as the display resolution and the refresh frequency increase, the conventional solution still fails to fundamentally solve the problem of insufficient charging time of the capacitor of the pixel unit far away from the scan driver because the gate is turned on for a short time.
Disclosure of Invention
In view of the above, the present disclosure provides a method for compensating brightness of a display panel and a display panel, so as to solve the problem in the prior art that the charging time of the capacitor of the pixel unit far from the source driver is not sufficient because the gate is turned on for a short time.
The present disclosure provides a display panel brightness compensation method, including:
providing a display panel, the display panel comprising: a plurality of pixel units, each pixel unit being connected to a source line; the source driver is connected with a plurality of source lines of the pixel units, an initial end of each source line is connected with the source driver, and one tail end of at least two of the source lines is respectively connected with a test pad;
providing a preset first voltage aiming at the initial end of each source line, and measuring a tail end voltage of the test pad;
providing a plurality of preset second voltages for an initial end of each source line, wherein the test pads are measured until the terminal voltage of the test pad of each source line is respectively equal to a preset first voltage of each source line, wherein the preset second voltage is greater than or equal to the preset first voltage;
establishing a lookup table of the preset second voltage and the preset first voltage; and
storing the lookup table in a memory unit of the display panel.
According to an embodiment of the present disclosure, the preset first voltage and the preset second voltage are dc voltages.
According to an embodiment of the present disclosure, the step of providing a plurality of preset second voltages to the initial end of each source line further includes the steps of:
comparing the preset first voltage of the initial end with the terminal voltage;
calculating a difference value between the preset first voltage and the tail end voltage to be used as a compensation voltage;
and compensating the compensation voltage to the terminal voltage to obtain the preset second voltage.
According to an embodiment of the present disclosure, the preset first voltage and the preset second voltage are ac voltages.
According to an embodiment of the present disclosure, the step of providing a plurality of preset second voltages to the initial end of each source line further includes the steps of:
the predetermined first voltage is provided for the initial end of each source line, wherein the predetermined second voltage is provided in a first period and the predetermined first voltage is provided in a second period.
The present disclosure further provides a display panel, including:
a plurality of pixel units, each pixel unit being connected to a source line;
one or more source drivers, each source driver being connected to a plurality of source lines of the plurality of pixel units, an initial end of each source line being connected to the source driver, a terminal end of each source line being connected to a test pad, respectively, the test pad being configured to measure a terminal voltage of the terminal end of the source line, the source driver being configured to compare the terminal voltage with a preset first voltage of the initial end of the source line, so as to correct the first voltage of the display panel according to a difference between the preset first voltage and the terminal voltage, so as to obtain a second preset voltage; and
and the memory unit is used for storing a lookup table comprising the preset first voltage and the preset second voltage.
According to an embodiment of the present disclosure, the preset first voltage and the preset second voltage are dc voltages.
According to an embodiment of the present disclosure, the source driver is configured to calculate the difference between the preset first voltage and the end voltage as a compensation voltage, and compensate the compensation voltage to the end voltage to obtain the preset second voltage.
According to an embodiment of the present disclosure, the preset first voltage and the preset second voltage are ac voltages.
According to an embodiment of the present disclosure, the source driver is configured to provide the predetermined second voltage during a first time period and provide the predetermined first voltage during a second time period.
The beneficial effects of the present disclosure are as follows. The disclosure provides a display panel brightness compensation method and a display panel. Connecting a test pad to each of the ends of at least two of the source lines, measuring a voltage at the end of the source line by using the test pad, and comparing the measured voltage with a preset voltage at the initial end of the source line, so as to correct the preset voltage of the source driver according to the voltage at the end. Furthermore, a voltage difference value needing to be compensated is obtained by comparing the terminal voltage with a preset voltage, and a lookup table of the voltage needing to be compensated and the preset voltage is established, so that the moire phenomenon caused by the problem of insufficient brightness of a pixel unit far away from a source driver in a fan-out (fanout) area is compensated. And by establishing a lookup table, the display panel with the same style only needs to be compared once without repeated testing, so that the production process is saved.
Drawings
FIG. 1 is a cross-sectional view of a fan-out area of a conventional display panel.
FIG. 2 is a flowchart illustrating a method for compensating brightness of a display panel according to a first embodiment of the present disclosure.
FIG. 3 is a diagram illustrating a method for compensating brightness of a display panel according to a second embodiment of the present disclosure.
FIG. 4 is a diagram illustrating a method for compensating brightness of a display panel according to a third embodiment of the present disclosure.
FIG. 5 is a schematic view of a display panel according to the present disclosure.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the disclosure may be practiced. In the drawings, elements having similar structures are denoted by the same reference numerals.
The following describes the implementation of the embodiments of the present disclosure in detail with reference to the accompanying drawings.
Please refer to fig. 2 in conjunction with fig. 5. FIG. 2 is a flowchart illustrating a method for compensating brightness of a display panel according to a first embodiment of the present disclosure. Fig. 5 is a schematic view of a display panel according to the present disclosure. The present disclosure provides a display panel brightness compensation method, comprising the following steps:
step S01: providing a display panel, the display panel comprising: a plurality of pixel units 10, each pixel unit 10 being connected to a source line 20; a source driver 30 connected to the source lines 20 of the pixel units 10, wherein an initial end 201 of each source line 20 is connected to the source driver 30, and an end 202 of at least two of the source lines 20 is connected to a test pad 40;
step S02: providing a predetermined first voltage V to the initial end 201 of each source line 20iniMeasuring an end voltage of the test pad 40;
step S03: providing a plurality of preset second voltages for the initial end 201 of each source line 20, wherein the test pads 40 are measured until the end voltage of each test pad 40 is respectively equal to a preset first voltage of the initial end 201 of each source line 20, wherein the preset second voltage is greater than or equal to the preset first voltage;
step S04: establishing a lookup table of the preset second voltage and the preset first voltage; and
step S05: the look-up table is stored in a memory unit 50 of the display panel.
According to an embodiment of the present disclosure, the test pad is disposed in a dummy pad area 70 at the edge of the display panel.
In the first embodiment, taking a fan-out area 60 of the display panel as an example, the source driver 30 includes N source lines 20. In one embodiment, the ends 202 of the N source lines 20 are respectively connected to a test pad 40. In various embodiments, the ends 202 of the N source lines 20 are connected to a test pad 40 at intervals. In another embodiment, the ends 40 of M source lines 20 of the N source lines 20 are arbitrarily selected to be connected to a test pad 40, respectively, where M is smaller than N. In yet another embodiment, a test pad 40 is disposed on each of the source lines 20 selected from the two side regions and the middle region of the fan-out region 60. In the above embodiment, the voltage of the end voltage can be confirmed by interpolation or the like without providing the test pad 40.
In a first embodiment, the preset first voltage and the preset second voltage are dc voltages.
In step S02, when a gate (not shown) is turned on, the source lines 20 are measuredThe end voltage at the farthest end from the source driver 30 is V1、V2、V3……VN。
In step S03, the preset first voltage V of the initial terminal 201 is setiniAnd the terminal voltage V1、V2、V3……VNComparing to obtain a preset first voltage ViniThe difference between the voltages of the test pads 40 is used as a compensation voltage Δ V, e.g., Δ V1＝Vini-V1、ΔV2＝Vini-V2、ΔV3＝Vini-V3……ΔVN＝Vini-VN. Then, the compensation voltage Δ V is compensated to the terminal voltage to obtain the preset second voltage VcompE.g. Vcomp1、Vcomp2、Vcomp3……VcompN. The source drivers 30 respectively use the preset second voltages Vcomp1、Vcomp2、Vcomp3……VcompNThe end voltage of each test pad 40 is output and tested again. The compensation voltage Δ V may just compensate for the voltage lost by each source line 20 at the end 202 away from the source driver 30. And may compensate to different degrees for different locations of the fan-out section 60, such as two side locations and a middle location of the fan-out section 60. For example, the length of the source line 20 (the distance from the source driver 30 to the pixel unit 10) in the middle portion of the fan-out section 60 is the smallest, so that the delay time is the smallest and the influence of insufficient charging is the smallest; the source line 20 length (distance between the source driver 30 and the pixel unit 10) on both sides of the fan-out section 60 is the largest, so that the delay time is the largest, and the influence of insufficient charging is also the largest. After the voltage difference values are measured by the test pads 40 and compensated by the source driver 30, the voltages at the middle portion of the fan-out area 60 and the ends of the test pads 40 at the two sides of the fan-out area 60 are the same, so that the moire phenomenon caused by the voltage difference generated by insufficient charging can be avoided.
In steps S04 to S05, a lookup table of the preset second voltages and the preset first voltages of the test pads of the entire display panel is established, and a memory unit 50 is stored, so that a timing controller of the display panel can adjust the output voltage value according to the lookup table. The test pads disposed in the empty pin area 70 may also be removed in a subsequent process. The display panel of the same model only needs to adjust the output voltage value according to the pre-established lookup table, and the test is not needed to be carried out on each display panel of the same model, so that the production process is saved. Therefore, in the industrial process, the voltage test average value of a plurality of display panels can be adopted to replace the voltage test average value of the large-size display panels in the whole batch, so that the workload of data acquisition is reduced, and the test times are reduced.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a method for compensating brightness of a display panel according to a second embodiment of the disclosure. In a second embodiment, the preset first voltage and the preset second voltage are ac voltages, wherein the preset second voltage is greater than the preset first voltage. The difference between the second embodiment and the first embodiment is that in step S03, the method further includes providing the predetermined second voltage V for a first period of timecompProviding the predetermined first voltage V in a second intervalini. Specifically, in the time period t1, the source driver 30 outputs the first voltage V higher than the preset voltage ViniVoltage (e.g. the preset second voltage V)compBut not limited thereto), during the time period t2, the source driver 30 outputs the first voltage V higher than or equal to the predetermined first voltage ViniThe terminal voltage of (2) is the same as the predetermined first voltage as long as the terminal voltage of the test pad 40 at the terminal 202 of the source line 20 is finally measured. The time period t1 and the time period t2 may be adjusted according to the model of the display panel and the measured voltage value, but not limited thereto. By compensating the terminal voltages of the source lines 20 farthest from the source driver 30 by outputting the ac voltage and controlling the output time of the ac voltage, the voltages measured at the middle portion of the fan-out area 60 and the terminal voltages measured by the test pads 40 at the two sides of the fan-out area 60 are the same, so that the occurrence of the moire phenomenon caused by the voltage difference due to the insufficient charging can be avoided.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a method for compensating brightness of a display panel according to a third embodiment of the disclosure. In the third embodiment, the display panel further includes a gate driver 80 connected to the gate lines 90 of the pixel units 10, an initial end of each gate line 90 is connected to the gate driver 80, and ends of at least two of the gate lines 90 are respectively connected to a test pad 40.
In addition to the source line 20 described above, the gate line 90 may also be provided with a test pad 40 for measuring the delay time of the capacitive charge of the gate in the third embodiment. The test pads 40 at the middle portion of the fan-out section 60 and at both sides of the fan-out section 60 can also be aligned and compensated according to the above-described method. For example, the length of the gate line 90 (the distance from the gate driver 80 to the pixel unit 10) in the middle portion of the fan-out region 60 is minimized, so that the delay time is minimized and the influence of insufficient charging is minimized; the gate line 90 length (distance between the gate driver 80 and the pixel unit 10) on both sides of the fan-out area 60 is the largest, so the delay time is the largest, and the influence of insufficient charging is also the largest. After the voltage difference values are measured by the test pads 40 and compensated by the source driver 30, the voltages at the middle portion of the fan-out area 60 and the ends of the test pads 40 at the two sides of the fan-out area 60 are the same, so that the moire phenomenon caused by the voltage difference generated by insufficient charging can be avoided.
As shown in fig. 5, the present disclosure provides a display panel, including: a plurality of pixel units 10, each pixel unit 10 being connected to a source line 20; one or more source drivers 30, each source driver 30 is connected to a plurality of source lines 20 of a plurality of pixel units 10, an initial end 201 of each source line 20 is connected to the source driver 30, an end 202 of each source line 20 is connected to a test pad 40, the test pad 40 measures an end voltage of the end 202 of the source line 20, the source driver 30 is configured to compare the end voltage with a preset first voltage of the initial end 201 of the source line 20, so as to correct the first voltage of the display panel according to a difference between the preset first voltage and the end voltage to obtain a second preset voltage; and a memory unit 50 for storing a lookup table including the preset first voltage and the preset second voltage.
The display panel is used for executing the display panel brightness compensation method in the above embodiments.
When the preset first voltage and the preset second voltage are dc voltages, the source driver 30 is configured to calculate the difference between the preset first voltage and the terminal voltage as a compensation voltage, and compensate the compensation voltage to the terminal voltage to obtain the preset second voltage. The compensation voltage may just compensate for the voltage lost by each source line 20 at the end 202 away from the source driver 30. And may compensate to different degrees for different locations of the fan-out section 60, such as two side locations and a middle location of the fan-out section 60. And the display panel of the same model only needs to adjust the output voltage value according to the pre-established lookup table, and the test is not needed to be carried out on each display panel of the same model, so that the production process is saved.
When the preset first voltage and the preset second voltage are ac voltages, the source driver 30 is configured to provide the preset second voltage in a first time period and provide the preset first voltage in a second time period. By compensating the terminal voltages of the source lines 20 farthest from the source driver 30 by outputting the ac voltage and controlling the output time of the ac voltage, the voltages measured at the middle portion of the fan-out area 60 and the terminal voltages measured by the test pads 40 at the two sides of the fan-out area 60 are the same, so that the occurrence of the moire phenomenon caused by the voltage difference due to the insufficient charging can be avoided.
The beneficial effects of the present disclosure are as follows. The disclosure provides a display panel brightness compensation method and a display panel. Connecting a test pad to each of the ends of at least two of the source lines, measuring a voltage at the end of the source line by using the test pad, and comparing the measured voltage with a preset voltage at the initial end of the source line, so as to correct the preset voltage of the source driver according to the voltage at the end. Furthermore, a voltage difference value needing to be compensated is obtained by comparing the terminal voltage with a preset voltage, and a lookup table of the voltage needing to be compensated and the preset voltage is established, so that the moire phenomenon caused by the problem of insufficient brightness of a pixel unit far away from a source driver in a fan-out (fanout) area is compensated. And by establishing a lookup table, the display panel with the same style only needs to be compared once without repeated testing, so that the production process is saved.
While the foregoing is directed to the preferred embodiment of the present disclosure, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the disclosure, and it is intended that such changes and modifications be covered by the appended claims.
Claims (10)
1. A method for compensating brightness of a display panel, comprising:
providing a display panel, the display panel comprising: a plurality of pixel units, each pixel unit being connected to a source line; the source driver is connected with a plurality of source lines of the pixel units, an initial end of each source line is connected with the source driver, and one tail end of at least two of the source lines is respectively connected with a test pad;
providing a preset first voltage aiming at the initial end of each source line, and measuring a tail end voltage of the test pad;
providing a plurality of preset second voltages for an initial end of each source line, wherein the test pads are measured until the terminal voltage of the test pad of each source line is respectively equal to a preset first voltage of each source line, wherein the preset second voltage is greater than or equal to the preset first voltage;
establishing a lookup table of the preset second voltage and the preset first voltage; and
storing the lookup table in a memory unit of the display panel.
2. The method of claim 1, wherein the predetermined first voltage and the predetermined second voltage are DC voltages.
3. The method of claim 2, wherein the step of providing a plurality of predetermined second voltages to the initial ends of the source lines further comprises the steps of:
comparing the preset first voltage of the initial end with the terminal voltage;
calculating a difference value between the preset first voltage and the tail end voltage to be used as a compensation voltage;
and compensating the compensation voltage to the terminal voltage to obtain the preset second voltage.
4. The method of claim 1, wherein the predetermined first voltage and the predetermined second voltage are AC voltages.
5. The method of claim 4, wherein the step of providing a plurality of preset second voltages to the initial ends of the source lines further comprises the steps of:
the predetermined first voltage is provided for the initial end of each source line, wherein the predetermined second voltage is provided in a first period and the predetermined first voltage is provided in a second period.
6. A display panel, comprising:
a plurality of pixel units, each pixel unit being connected to a source line;
one or more source drivers, each source driver being connected to a plurality of source lines of the plurality of pixel units, an initial end of each source line being connected to the source driver, a terminal end of each source line being connected to a test pad, respectively, the test pad being configured to measure a terminal voltage of the terminal end of the source line, the source driver being configured to compare the terminal voltage with a preset first voltage of the initial end of the source line, so as to correct the first voltage of the display panel according to a difference between the preset first voltage and the terminal voltage, so as to obtain a second preset voltage; and
and the memory unit is used for storing a lookup table comprising the preset first voltage and the preset second voltage.
7. The display panel according to claim 6, wherein the predetermined first voltage and the predetermined second voltage are DC voltages.
8. The display panel of claim 7, wherein the source driver is configured to calculate the difference between the preset first voltage and the end voltage as a compensation voltage, and compensate the compensation voltage to the end voltage to obtain the preset second voltage.
9. The display panel according to claim 6, wherein the predetermined first voltage and the predetermined second voltage are AC voltages.
10. The display panel of claim 9, wherein the source driver is configured to provide the predetermined second voltage during a first time period and provide the predetermined first voltage during a second time period.
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