CN110189727B - Driving method and driving device of display panel and display device - Google Patents
Driving method and driving device of display panel and display device Download PDFInfo
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- CN110189727B CN110189727B CN201910569521.1A CN201910569521A CN110189727B CN 110189727 B CN110189727 B CN 110189727B CN 201910569521 A CN201910569521 A CN 201910569521A CN 110189727 B CN110189727 B CN 110189727B
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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
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The invention discloses a driving method and a driving device of a display panel and a display device. The method comprises the following steps: acquiring brightness to be displayed and gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a light-emitting brightness driving data; acquiring luminance compensation data corresponding to the light-emitting unit according to the luminance to be displayed and the gray scale to be displayed; determining a driving signal of the light emitting unit according to the light emitting brightness compensation data and the light emitting brightness driving data; and driving the light emitting unit to emit light according to the driving signal. The method comprises the steps of obtaining luminance compensation data corresponding to a light-emitting unit according to the luminance to be displayed and the gray scale to be displayed, comprehensively considering the luminance to be displayed and the gray scale to be displayed of the light-emitting unit, enabling the obtained luminance compensation data to better accord with the luminance deviation level of the light-emitting unit, achieving compensation of corresponding degree to the problem of uneven display under different display luminance, improving compensation effect of each display gray scale under low display luminance, and improving uniformity of a display panel under different display luminance.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a driving method and a driving device of a display panel and a display device.
Background
At present, in order to improve the display uniformity of the light emitting units in the display panel, Source dimming is generally used to adjust the light emitting brightness of the light emitting units, and the Source dimming is to adjust the light emitting brightness of the light emitting units by adjusting the driving voltage of each light emitting unit in the display panel.
However, the conventional dimming method has a poor effect of improving the display unevenness at the time of low display luminance.
Disclosure of Invention
The invention provides a driving method, a driving device and a display device of a display panel, which are used for improving the display uniformity of the display panel.
In a first aspect, an embodiment of the present invention provides a method for driving a display panel, where the display panel includes a plurality of light emitting units, the method including:
acquiring brightness to be displayed and gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a light-emitting brightness driving data;
acquiring luminance compensation data corresponding to the light-emitting unit according to the luminance to be displayed and the gray scale to be displayed;
determining a driving signal of the light emitting unit according to the light emitting brightness compensation data and the light emitting brightness driving data;
and driving the light-emitting unit to emit light according to the driving signal.
Optionally, obtaining luminance compensation data corresponding to the light-emitting unit according to the luminance to be displayed and the gray scale to be displayed includes:
determining a light-emitting brightness compensation data set corresponding to the light-emitting unit according to the brightness to be displayed; wherein, the brightness to be displayed in different value ranges corresponds to different brightness compensation data sets;
and acquiring the light-emitting brightness compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed.
Optionally, the light-emitting brightness compensation data set includes a first light-emitting brightness compensation data set and a second light-emitting brightness compensation data set;
determining a luminance compensation data set corresponding to the light-emitting unit according to the luminance to be displayed, including:
comparing the brightness to be displayed with a preset brightness threshold value;
if the brightness to be displayed is larger than the preset brightness threshold, determining the first light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit;
and if the brightness to be displayed is less than or equal to the preset brightness threshold, determining the second light-emitting brightness compensation data set as the light-emitting brightness compensation data set corresponding to the light-emitting unit.
Optionally, obtaining the light-emitting luminance compensation data from the light-emitting luminance compensation data set according to the to-be-displayed gray scale includes:
acquiring initial compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed, wherein the light-emitting brightness compensation data group comprises the initial compensation data corresponding to n display gray scales, and n is a positive integer smaller than 256;
and determining the light-emitting brightness compensation data corresponding to the gray scale to be displayed according to the initial compensation data.
Optionally, determining, according to the initial compensation data, light-emitting luminance compensation data corresponding to the gray scale to be displayed, includes:
and determining the light-emitting brightness compensation data by adopting an interpolation algorithm according to the initial compensation data.
Optionally, determining the driving signal of the light emitting unit according to the light emitting brightness compensation data and the light emitting brightness driving data includes:
and adding the light-emitting brightness compensation data and the light-emitting brightness driving data to form the driving signal.
Optionally, the light emitting unit is an organic light emitting diode, and the light emitting luminance driving data is a driving voltage of the light emitting unit.
In a second aspect, an embodiment of the present invention further provides a driving apparatus for a display panel, including:
the module for acquiring the brightness to be displayed and the gray scale to be displayed is used for acquiring the brightness to be displayed and the gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a light-emitting brightness driving data;
the compensation data acquisition module is used for acquiring the light-emitting brightness compensation data corresponding to the light-emitting unit according to the brightness to be displayed and the gray scale to be displayed;
the driving signal determining module is used for determining a driving signal of the light-emitting unit according to the light-emitting brightness compensation data and the light-emitting brightness driving data;
and the driving module is used for driving the light-emitting unit to emit light according to the driving signal.
Optionally, the compensation data acquiring module includes a comparing unit and a compensation data confirming unit;
the comparison unit is used for comparing the brightness to be displayed with a preset brightness threshold value; if the brightness to be displayed is larger than the preset brightness threshold, determining a first light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit; if the brightness to be displayed is less than or equal to the preset brightness threshold, determining a second light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit;
the compensation data acquisition unit is used for acquiring the light-emitting brightness compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed.
In a third aspect, an embodiment of the present invention further provides a display device, including a display panel and a driving device of the display panel provided in any embodiment of the present invention;
the driving device of the display panel is used for driving the display panel to display.
According to the technical scheme of the embodiment of the invention, in the process of compensating the luminance driving data, the luminance compensation data corresponding to the light-emitting unit is obtained according to the luminance to be displayed and the gray scale to be displayed, the luminance to be displayed and the gray scale to be displayed of the light-emitting unit are comprehensively considered during compensation, so that the obtained luminance compensation data is more consistent with the luminance deviation level of the light-emitting unit, the luminance deviation of the light-emitting unit under different display luminance can be correspondingly compensated, the bright spot deviation of the light-emitting unit under different display luminance is ensured to have better compensation effect, and the display panel under different display luminance is ensured to have better display uniformity.
Drawings
Fig. 1 is a flowchart of a driving method of a display panel according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating another driving method for a display panel according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating another driving method for a display panel according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating another driving method for a display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a driving apparatus of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the prior art, due to the problems of manufacturing process or leakage current and the like, the light-emitting unit in the display panel has the problem of uneven display. For example, due to the difference in semiconductor manufacturing processes, the reference voltages generated by the voltage generation modules in different source thin film drivers may also have a difference. The difference in the reference voltages may cause the driving voltages output by the source thin film driver to be different, thereby causing display nonuniformity of the light emitting cells. Or, the data storage capacitors in the pixel circuits may leak, and the data storage capacitors in different pixel circuits may leak differently, which causes the gate voltages of the driving transistors in different pixel circuits to be different, and the light emitting units to display unevenly.
In order to improve the phenomenon of uneven display of the light-emitting unit, the prior art provides a source dimming method, and when the source is dimmed, the driving chip compensates the driving voltage, so that the problem of uneven display of the light-emitting unit is solved. The existing source dimming adopts the same compensation value to compensate for the same display gray scale, but the current output by each data line on the display panel has an error, so the problem of uneven display of the light-emitting unit is poor in improvement effect under the condition of low display brightness.
Based on the foregoing technical problem, an embodiment of the present invention provides a driving method for a display panel. Fig. 1 is a flowchart of a driving method of a display panel according to an embodiment of the present invention. As shown in fig. 1, the display panel includes a plurality of light emitting cells. The driving method includes:
s110, acquiring brightness to be displayed and gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a luminance driving data.
Specifically, the light emission luminance of the light emitting unit is related to a γ value and a gray scale. Wherein, the driving voltage ranges corresponding to the 0-255 gray scales are different when the gamma values are different, and the light-emitting brightness corresponding to the 0-255 gray scales is different. Exemplarily, if the driving voltage range of the display panel is 0-6.5V, when the γ value is the maximum value, the driving voltage range corresponding to the 0-255 gray scale of the display panel is 0-6.5V, each gray scale corresponds to a voltage value within the voltage range of 0-6.5V, and each gray scale corresponds to a light emitting brightness in 0-Lmax, where Lmax is the maximum light emitting brightness of the light emitting unit; when the gamma value is 30% of the maximum value, the driving voltage range corresponding to the 0-255 gray scale of the display panel is 0-1.95V, each gray scale corresponds to a voltage value within the voltage range of 0-1.95V, and each gray scale corresponds to a light emitting brightness in 0-30% Lmax.
The brightness to be displayed is the display brightness of the light-emitting unit in the next frame of display picture to be displayed by the display panel, and the gray scale to be displayed is the display gray scale of the light-emitting unit in the next frame of display picture of the display panel. The brightness to be displayed is the display brightness determined by the gamma value to be displayed and the gray scale to be displayed together, and each brightness to be displayed corresponds to the light-emitting brightness driving data. The light emitting unit can be an organic light emitting diode, the light emitting brightness driving data can be driving voltage of the light emitting unit, and driving current flowing through the light emitting diode in the pixel circuit can be adjusted by adjusting the driving voltage, so that the light emitting brightness of the light emitting diode is adjusted.
In addition, the next frame of display picture can be acquired from the image memory of the display panel, and the brightness to be displayed and the gray scale to be displayed of each light-emitting unit are determined according to the next frame of display picture.
And S120, acquiring the light-emitting brightness compensation data corresponding to the light-emitting unit according to the brightness to be displayed and the gray scale to be displayed.
Specifically, the brightness deviation is different when the same light emitting unit displays the same gray scale under different display brightness. For example, at a higher display luminance, the luminance deviation of the light-emitting unit is smaller, and the degree of compensation of the light-emitting luminance compensation data corresponding to the light-emitting unit is smaller. Under the lower display brightness, the brightness deviation of the light-emitting unit is larger, and the compensation degree of the corresponding light-emitting brightness compensation data of the light-emitting unit is larger at the moment. Therefore, under different display brightness, the same display gray scale of the same light-emitting unit corresponds to different light-emitting brightness compensation data, so that the brightness deviation of the light-emitting unit under different display brightness can be correspondingly compensated, the compensation of corresponding degree is realized for the problem of uneven display under different display brightness, and the display uniformity of the display panel under different display brightness is improved.
The brightness to be displayed and the gray scale to be displayed of the light-emitting unit are comprehensively considered in the compensation process, so that the acquired brightness compensation data are more consistent with the brightness deviation level of the light-emitting unit, the brightness deviation of the light-emitting unit under different display brightness can be correspondingly compensated, the brightness deviation of the light-emitting unit has a better compensation effect when different display brightness is ensured, and the display panel has better display uniformity under different display brightness.
In addition, the light emission luminance compensation data may be acquired during the display panel test. In the process of testing the display panel, under the same gamma value, the driving chip outputs a plurality of frames of pictures for lighting the display panel, wherein the gray scales of the pictures of different frames are different. The method comprises the steps of shooting a plurality of frames of pictures by adopting a high-resolution and high-precision CCD camera, analyzing the color distribution characteristics of pixels according to picture data collected by the CCD camera, and identifying uneven display brightness data of a display panel through an algorithm. And generating light-emitting brightness compensation data according to the display brightness unevenness data of the display panel and a corresponding Demura compensation algorithm, and storing the generated light-emitting brightness compensation data. By setting different gamma values, the light-emitting brightness compensation data of a plurality of display gray scales in different gamma values are respectively obtained, so that the light-emitting brightness compensation data corresponding to each display gray scale under different display brightness is determined.
And S130, determining a driving signal of the light-emitting unit according to the light-emitting brightness compensation data and the light-emitting brightness driving data.
Specifically, the light emitting luminance driving data corresponds to a driving voltage of the light emitting unit, and the driving signal is the compensated driving voltage.
And S140, driving the light-emitting unit to emit light according to the driving signal.
According to the technical scheme, in the process of compensating the brightness driving data, the brightness compensation data corresponding to the light-emitting unit is obtained according to the brightness to be displayed and the gray scale to be displayed, the brightness to be displayed and the gray scale to be displayed of the light-emitting unit are comprehensively considered in the compensation process, so that the obtained brightness compensation data more accord with the brightness deviation level of the light-emitting unit, the brightness deviation of the light-emitting unit under different display brightness can be correspondingly compensated, the bright spot deviation of the light-emitting unit under different display brightness is ensured to have a better compensation effect, and the display panel under different display brightness is ensured to have better display uniformity.
Fig. 2 is a flowchart of another driving method of a display panel according to an embodiment of the invention. As shown in fig. 2, the driving method includes:
s210, acquiring brightness to be displayed and gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a luminance driving data.
S221, determining a light-emitting brightness compensation data set corresponding to the light-emitting unit according to the brightness to be displayed; wherein, the brightness to be displayed in different value ranges corresponds to different brightness compensation data sets.
Specifically, each light-emitting luminance compensation data set is a light-emitting luminance compensation data set corresponding to different display gray scales when the luminance to be displayed is within a certain range. The display brightness range with the brightness deviation close to each other can be divided into a group, each display gray scale in the brightness value range can adopt a group of compensation data, the same gray scale to be displayed can adopt the same brightness compensation data in the brightness value range, the quantity of the brightness compensation data can be greatly reduced while the better compensation of the brightness deviation with different degrees is ensured, the speed of driving the display panel is improved, and the hardware requirement on the display panel driving device can be reduced.
S222, acquiring light-emitting brightness compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed.
Specifically, one of the light-emitting luminance compensation data sets includes light-emitting luminance compensation data corresponding to a plurality of different display grayscales. And selecting the luminance compensation data corresponding to the display gray scale from the determined luminance compensation data group according to the gray scale to be displayed, thereby realizing the compensation of the luminance deviation corresponding to the light-emitting unit when displaying the luminance to be displayed and the gray scale to be displayed.
Illustratively, a first group of compensation data is adopted when the brightness to be displayed is in a range of a-b, a second group of compensation data is adopted when the brightness to be displayed is in a range of b-c, a third group of compensation data is adopted when the brightness to be displayed is in a range of c-d, and so on. Each group of compensation data can store the light-emitting brightness compensation data corresponding to a plurality of gray scales to be displayed. For example, when the luminance to be displayed is within the range of a-b and the gray scale to be displayed is 200 gray scales, the luminance compensation data corresponding to the 200 gray scales can be searched in the first group of compensation data.
In addition, the light-emitting brightness data compensation group can include light-emitting brightness compensation data corresponding to all display gray scales in the brightness range, and can also include light-emitting brightness compensation data corresponding to part of the display gray scales in the brightness range. When the light-emitting luminance data compensation set includes light-emitting luminance compensation data corresponding to all display grayscales within the luminance range, the light-emitting luminance data compensation set illustratively includes 64 light-emitting luminance compensation data corresponding to 0-64 display grayscales, respectively. At this time, the luminance compensation data corresponding to the gray scale to be displayed can be directly obtained from the luminance data compensation group according to the gray scale to be displayed.
Optionally, when the light-emitting luminance data compensation group includes light-emitting luminance compensation data corresponding to a part of display gray scales, obtaining the light-emitting luminance compensation data from the light-emitting luminance compensation data group according to the to-be-displayed gray scales, specifically including:
acquiring initial compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed, wherein the light-emitting brightness compensation data group comprises the initial compensation data corresponding to n display gray scales, and n is a positive integer less than 256; and determining the light-emitting brightness compensation data corresponding to the gray scale to be displayed according to the initial compensation data.
Specifically, the luminance data compensation group comprises luminance compensation data corresponding to part of display gray scales, and the number of the luminance compensation data can be further reduced, so that the speed of driving the display panel is further improved, and the hardware requirement on the display panel driving device can be reduced.
The initial compensation data is the light-emitting brightness compensation data included in the light-emitting brightness compensation data set. In general, the luminance compensation data corresponding to the representative display gray scale of 0-255 display gray scales can be selected. For example, the light emission luminance compensation data group includes initial compensation data of light emission luminance compensation data corresponding to display gradations of 255, 196, 128, 64, and 32. When the initial compensation data in the light-emitting brightness compensation data group is obtained according to the gray scale to be displayed, the light-emitting brightness compensation data corresponding to the display gray scale close to the gray scale to be displayed can be obtained. For example, when the gray scale to be displayed is 50, the light emission luminance compensation data corresponding to the 64 and 32 display gray scales may be acquired.
Specifically, after the initial compensation data corresponding to the gray scale to be displayed is obtained, the luminance compensation data corresponding to the gray scale to be displayed may be calculated according to the initial compensation data. For example, the light emission luminance compensation data is determined using an interpolation algorithm based on the initial compensation data. Illustratively, when the gray scale to be displayed is 50, the initial compensation data is the light-emitting luminance compensation data corresponding to 64 and 32 display gray scales. The light-emitting brightness compensation data corresponding to the display gray scales between 64 and 32 are obtained by interpolating the light-emitting brightness compensation data corresponding to the 64 and 32 display gray scales, that is, the light-emitting brightness compensation data corresponding to the 50 display gray scale is obtained.
And S230, determining a driving signal of the light-emitting unit according to the light-emitting brightness compensation data and the light-emitting brightness driving data.
And S240, driving the light emitting unit to emit light according to the driving signal.
According to the technical scheme of the embodiment, the light-emitting brightness compensation data set corresponding to the light-emitting unit is determined according to the brightness to be displayed, wherein the brightness to be displayed in different value ranges corresponds to different light-emitting brightness compensation data sets. And acquiring the light-emitting brightness compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed. When the compensation of the corresponding degree is realized to the uneven display problem of different degrees, the quantity of the luminous brightness compensation data is greatly reduced, the speed of driving the display panel is improved, and the hardware requirement on the display panel driving device can be reduced.
Fig. 3 is a flowchart of another driving method of a display panel according to an embodiment of the invention. As shown in fig. 3, the light emission luminance compensation data set includes a first light emission luminance compensation data set and a second light emission luminance compensation data set, and the driving method includes:
s310, acquiring brightness to be displayed and gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a luminance driving data.
And S321, comparing the brightness to be displayed with a preset brightness threshold value.
And if the brightness to be displayed is greater than the preset brightness threshold value, determining the first light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit.
And if the brightness to be displayed is less than or equal to the preset brightness threshold, determining the second light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit.
Specifically, the preset brightness threshold is a preset display brightness value. The first and second luminance compensation data sets may include luminance compensation data corresponding to a portion of the display gray scale. And when the light-emitting brightness compensation data is selected, determining the light-emitting brightness compensation data corresponding to the gray scale to be displayed according to the initial compensation data in the light-emitting brightness compensation data group.
Through the verification of experimental simulation, the luminance compensation data are divided into two groups according to the range of the luminance to be displayed, so that the luminance compensation data are reduced to the maximum extent while the display unevenness of different degrees is compensated well, and the display effect and the driving performance of the display panel are good.
Illustratively, when the display brightness is expressed in percentage, the preset brightness threshold may be set to 30%. When the brightness to be displayed is greater than 30%, the display brightness is higher, the display unevenness degree of the light-emitting unit is smaller, and the light-emitting brightness compensation data in the first light-emitting brightness compensation data group can be selected for compensation. When the brightness to be displayed is less than or equal to 30%, the display brightness is lower, the display unevenness degree of the light-emitting unit is more serious, and the light-emitting brightness compensation data in the second light-emitting brightness compensation data group can be selected for compensation.
And S322, acquiring the light-emitting brightness compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed.
And S330, determining a driving signal of the light-emitting unit according to the light-emitting brightness compensation data and the light-emitting brightness driving data.
And S340, driving the light emitting unit to emit light according to the driving signal.
Fig. 4 is a flowchart of another driving method of a display panel according to an embodiment of the invention. As shown in fig. 4, the driving method includes:
s410, acquiring brightness to be displayed and gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a luminance driving data.
And S420, acquiring the light-emitting brightness compensation data corresponding to the light-emitting unit according to the brightness to be displayed and the gray scale to be displayed.
And S430, adding the light-emitting brightness compensation data and the light-emitting brightness driving data to form a driving signal.
Specifically, both the light emission luminance compensation data and the light emission luminance driving data may be stored in the form of digital signals. For example, when the range of the analog signal of the light emission luminance driving data is 0 to 6.5V, it can be converted into a digital signal in the range of 0 to 4096. Therefore, the data accuracy of the light emission luminance compensation data and the light emission luminance drive data can be improved, and the accuracy of the drive signal obtained from the light emission luminance compensation data and the light emission luminance drive data can be further improved.
And S440, driving the light emitting unit to emit light according to the driving signal.
The embodiment of the invention also provides a driving device of the display panel. The display panel includes a plurality of light emitting units. Fig. 5 is a schematic structural diagram of a driving apparatus of a display panel according to an embodiment of the present invention. As shown in fig. 5, the driving apparatus includes:
a module 10 for acquiring brightness to be displayed and gray scale to be displayed, which is used for acquiring the brightness to be displayed and gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a luminance driving data.
And the compensation data acquisition module 20 is configured to acquire luminance compensation data corresponding to the light-emitting unit according to the luminance to be displayed and the gray scale to be displayed.
And a driving signal determining module 30 for determining a driving signal of the light emitting unit according to the light emitting brightness compensation data and the light emitting brightness driving data.
And the driving module 40 is used for driving the light emitting unit to emit light according to the driving signal.
According to the technical scheme of the embodiment of the invention, in the process of compensating the luminance driving data, the luminance compensation data acquisition module corresponding to the light-emitting unit can acquire the luminance compensation data corresponding to the light-emitting unit according to the luminance to be displayed and the gray scale to be displayed, and the luminance to be displayed and the gray scale to be displayed of the light-emitting unit are comprehensively considered during compensation, so that the acquired luminance compensation data more conforms to the luminance deviation level of the light-emitting unit, the luminance deviation of the light-emitting unit under different display luminances can be correspondingly compensated, the bright spot deviation of the light-emitting unit under different display luminances is ensured to have better compensation effect, and the display panel under different display luminances is ensured to have better display uniformity.
With continued reference to fig. 5, the compensation data acquisition module 20 includes a comparison unit and a compensation data validation unit.
The comparison unit is used for comparing the brightness to be displayed with a preset brightness threshold value. And if the brightness to be displayed is greater than the preset brightness threshold value, determining the first light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit. And if the brightness to be displayed is less than or equal to the preset brightness threshold, determining the second light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit.
The compensation data acquisition unit is used for acquiring the light-emitting brightness compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed.
The driving device provided by the embodiment and the driving method provided by any embodiment of the invention belong to the same inventive concept, and detailed technical details of the driving device provided by any embodiment of the invention are not shown in the detailed technical details of the embodiment.
The embodiment of the invention also provides a display device. Fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 6, the display device 60 includes a display panel 61 and a driving device 62 of the display panel provided in any embodiment of the present invention. The driving device 62 of the display panel is used for driving the display panel 61 to display.
Specifically, the display device 60 includes the driving device 62 for the display panel provided in any embodiment of the present invention, and therefore, when the driving device 62 for driving the display panel drives the display panel 61 to display, the beneficial effects of the driving device 62 for the display panel provided in any embodiment of the present invention are achieved, and are not described herein again.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A method of driving a display panel, the display panel including a plurality of light emitting cells, the method comprising:
acquiring brightness to be displayed and gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a light-emitting brightness driving data;
determining a light-emitting brightness compensation data set corresponding to the light-emitting unit according to the brightness to be displayed; wherein, the brightness to be displayed in different value ranges corresponds to different brightness compensation data sets;
acquiring the brightness compensation data from the brightness compensation data group according to the gray scale to be displayed;
adding the light-emitting brightness compensation data and the light-emitting brightness driving data to form a driving signal;
and driving the light-emitting unit to emit light according to the driving signal.
2. The method according to claim 1, wherein the light emission luminance compensation data set includes a first light emission luminance compensation data set and a second light emission luminance compensation data set;
determining a luminance compensation data set corresponding to the light-emitting unit according to the luminance to be displayed, including:
comparing the brightness to be displayed with a preset brightness threshold value;
if the brightness to be displayed is larger than the preset brightness threshold, determining the first light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit;
and if the brightness to be displayed is less than or equal to the preset brightness threshold, determining the second light-emitting brightness compensation data set as the light-emitting brightness compensation data set corresponding to the light-emitting unit.
3. The method according to claim 1, wherein obtaining the luminance compensation data from within the luminance compensation data set according to the gray scale to be displayed comprises:
acquiring initial compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed, wherein the light-emitting brightness compensation data group comprises the initial compensation data corresponding to n display gray scales, and n is a positive integer smaller than 256;
and determining the light-emitting brightness compensation data corresponding to the gray scale to be displayed according to the initial compensation data.
4. The method as claimed in claim 3, wherein determining the compensation data of the luminance of the gray scale to be displayed according to the initial compensation data comprises:
and determining the light-emitting brightness compensation data by adopting an interpolation algorithm according to the initial compensation data.
5. The method according to any one of claims 1-4, wherein:
the light emitting unit is an organic light emitting diode, and the light emitting brightness driving data is driving voltage of the light emitting unit.
6. A driving apparatus of a display panel, the display panel including a plurality of light emitting units, the driving apparatus comprising:
the module for acquiring the brightness to be displayed and the gray scale to be displayed is used for acquiring the brightness to be displayed and the gray scale to be displayed of the light-emitting unit; each brightness to be displayed corresponds to a light-emitting brightness driving data;
the compensation data acquisition module is used for determining a light-emitting brightness compensation data set corresponding to the light-emitting unit according to the brightness to be displayed; wherein, the brightness to be displayed in different value ranges corresponds to different brightness compensation data sets; acquiring the brightness compensation data from the brightness compensation data group according to the gray scale to be displayed;
the driving signal determining module is used for summing the light-emitting brightness compensation data and the light-emitting brightness driving data to form a driving signal;
and the driving module is used for driving the light-emitting unit to emit light according to the driving signal.
7. The driving apparatus of a display panel according to claim 6, wherein the compensation data obtaining module includes a comparing unit and a compensation data confirming unit;
the comparison unit is used for comparing the brightness to be displayed with a preset brightness threshold value; if the brightness to be displayed is larger than the preset brightness threshold, determining a first light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit; if the brightness to be displayed is less than or equal to the preset brightness threshold, determining a second light-emitting brightness compensation data set as a light-emitting brightness compensation data set corresponding to the light-emitting unit;
and the compensation data acquisition module is used for acquiring the light-emitting brightness compensation data from the light-emitting brightness compensation data group according to the gray scale to be displayed.
8. A display device comprising a display panel and a driving device of the display panel according to any one of claims 6 to 7;
the driving device of the display panel is used for driving the display panel to display.
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