CN113450693A - Driving device and driving method of display panel and display device - Google Patents

Driving device and driving method of display panel and display device Download PDF

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Publication number
CN113450693A
CN113450693A CN202110748969.7A CN202110748969A CN113450693A CN 113450693 A CN113450693 A CN 113450693A CN 202110748969 A CN202110748969 A CN 202110748969A CN 113450693 A CN113450693 A CN 113450693A
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display brightness
value
display
compensation
level
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CN113450693B (en
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卢晶晶
王铁钢
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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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
    • 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
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The embodiment of the invention discloses a driving device and a driving method of a display panel and a display device. The driving device of the display panel includes: the driving voltage adjusting module is electrically connected with the display brightness compensation module; the driving voltage adjusting module is used for adjusting the driving voltage of the display panel according to the interval to which the display brightness grade belongs, and transmitting the display brightness grade and the corresponding driving voltage and display brightness value to the display brightness compensation module in the compensation stage; the display brightness compensation module is used for compensating the display brightness value in a compensation stage so as to enable the display brightness values corresponding to adjacent display brightness levels of the display panel under different driving voltages to be continuous; the driving voltages corresponding to different display brightness grade intervals are different; the driving voltage includes at least one of a power supply voltage and an initialization voltage. The technical scheme of the embodiment of the invention is beneficial to relieving the screen flashing phenomenon of the display device.

Description

Driving device and driving method of display panel and display device
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a driving device and a driving method of a display panel and a display device.
Background
With the development of display technology, people have higher and higher requirements for the performance of display devices. At present, when the display brightness of the existing display device is adjusted, the phenomenon of sudden change of the display brightness, namely the phenomenon of screen flashing, generally exists, so that the display effect is influenced, and the user experience is reduced.
Disclosure of Invention
The embodiment of the invention provides a driving device and a driving method of a display panel and a display device, which are used for relieving the screen flashing phenomenon of the display device.
In a first aspect, an embodiment of the present invention provides a driving apparatus for a display panel, including: the display device comprises a driving voltage adjusting module and a display brightness compensation module, wherein the driving voltage adjusting module is electrically connected with the display brightness compensation module;
the driving voltage adjusting module is used for adjusting the driving voltage of the display panel according to the interval to which the display brightness grade belongs, and transmitting the display brightness grade and the corresponding driving voltage and display brightness value to the display brightness compensation module in a compensation stage;
the display brightness compensation module is used for compensating the display brightness value in a compensation stage so as to enable the display brightness value corresponding to the adjacent display brightness levels of the display panel under different driving voltages to be continuous;
the display device comprises a display brightness level range, a driving voltage and a driving voltage, wherein a plurality of display brightness level ranges are arranged between the minimum value of the display brightness levels and the maximum value of the display brightness levels, one display brightness level range corresponds to one driving voltage, and the driving voltages corresponding to different display brightness level ranges are different; the driving voltage includes at least one of a power supply voltage and an initialization voltage.
In a second aspect, an embodiment of the present invention further provides a display device, including a display panel and the driving device of the display panel according to the first aspect.
In a third aspect, an embodiment of the present invention further provides a driving method of a display panel, which is performed by a driving apparatus of the display panel, where the driving apparatus of the display panel includes: the display device comprises a driving voltage adjusting module and a display brightness compensation module, wherein the driving voltage adjusting module is electrically connected with the display brightness compensation module;
the driving method includes:
adjusting the driving voltage of the display panel through the driving voltage adjusting module according to the interval to which the display brightness grade belongs, and transmitting the display brightness grade and the corresponding driving voltage and display brightness value to the display brightness compensating module in a compensating stage;
compensating the display brightness value through the display brightness compensation module in a compensation stage so as to enable the display brightness value corresponding to the adjacent display brightness levels of the display panel under different driving voltages to be continuous;
the display device comprises a display brightness level range, a driving voltage and a driving voltage, wherein a plurality of display brightness level ranges are arranged between the minimum value of the display brightness levels and the maximum value of the display brightness levels, one display brightness level range corresponds to one driving voltage, and the driving voltages corresponding to different display brightness level ranges are different; the driving voltage includes at least one of a power supply voltage and an initialization voltage.
The driving device and the driving method for the display panel and the display device provided by the embodiment of the invention are characterized in that the driving device for the display panel comprises a driving voltage adjusting module and a display brightness compensating module, in the compensation stage, the driving voltage of the display panel is adjusted through the driving voltage adjusting module according to the interval to which the display brightness grade belongs, meanwhile, the display brightness level, the corresponding driving voltage and the display brightness value of the maximum gray scale are transmitted to the display brightness compensation module, and the display brightness compensation module compensates the display brightness value of the maximum gray scale corresponding to each display brightness level, so that the display brightness values of the maximum gray scales corresponding to the compensated adjacent display brightness levels are continuous, and thus, when the display brightness levels are adjusted, even if the driving voltages corresponding to the adjacent display brightness level intervals are different, the display brightness value of the maximum gray scale corresponding to the adjacent display brightness level intervals does not have sudden change. Compared with the prior art, when driving voltage includes mains voltage, this scheme helps reducing display device's consumption, when extension display device's stand-by time, alleviates the splash screen phenomenon of display device when showing the regulation of brightness level, and when driving voltage includes initialization voltage, this scheme helps when optimizing display effect, alleviates the splash screen phenomenon of display device when showing the regulation of brightness level, and then promotes display device's performance.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
FIG. 3 is a graph illustrating a display brightness level before compensation and a display brightness value according to an embodiment of the present invention;
FIG. 4 is a graph illustrating the compensated display brightness level and the display brightness value according to the embodiment of the present invention;
fig. 5 is a schematic block diagram of a driving apparatus of a display panel according to an embodiment of the present invention;
FIG. 6 is a graph comparing display brightness levels and display brightness values before and after compensation according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another display device according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating a driving method of a display panel 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.
As described in the background art, when the display brightness of the conventional display device is adjusted, a phenomenon of sudden change of the display brightness, i.e., a phenomenon of screen flashing, generally occurs. The inventor researches and finds that the reason for the problems is that: in order to optimize the performance of the display device, the driving voltage of the display device may be set such that the display device is driven by different driving voltages at different display luminances. For example, the driving voltage may include a power supply voltage, and the display device may be configured to be driven by different power supply voltages at different display brightness levels, where the display brightness level of the display device is generally positively correlated with the display brightness value of the maximum gray scale of the display device, and thus the display brightness may be adjusted by adjusting the display brightness level of the display device. When the user adjusts the display brightness, because the power supply voltages corresponding to different display brightness levels are different, and the relationship between the data voltages corresponding to different power supply voltages and the display brightness is different, when the display brightness level is adjusted to another display brightness level, the display brightness is suddenly changed, so that the display effect is influenced, and the user experience is reduced.
In view of the above problems, embodiments of the present invention provide a driving apparatus for a display panel. Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device shown in fig. 1 includes a display panel 10 and a driving device 20 for the display panel, and as shown in fig. 1, the driving device 20 for the display panel includes: the driving voltage adjusting module 210 and the display brightness compensating module 220, wherein the driving voltage adjusting module 210 is electrically connected with the display brightness compensating module 220;
the driving voltage adjusting module 210 is configured to adjust a driving voltage of the display panel 10 according to a region to which the display brightness level belongs, and transmit the display brightness level, a driving voltage corresponding to the display brightness level, and a display brightness value to the display brightness compensation module 220 in a compensation stage;
the display brightness compensation module 220 is configured to compensate the display brightness value in the compensation stage, so that the display brightness values corresponding to adjacent display brightness levels of the display panel 10 under different driving voltages are continuous;
the display device comprises a display brightness level control circuit, a display brightness level control circuit and a display brightness level control circuit, wherein a plurality of display brightness level intervals are arranged between the minimum value of the display brightness level and the maximum value of the display brightness level, one display brightness level interval corresponds to one driving voltage, and the driving voltages corresponding to different display brightness level intervals are different; the driving voltage includes at least one of a power supply voltage and an initialization voltage.
Specifically, the display device shown in fig. 1 may include a display panel 10, a driving device 20 and a gate driver 30 of the display panel, a plurality of scan lines GL extending in a row direction and a plurality of data lines DL extending in a column direction and crossing the scan lines GL, the crossings of the scan lines GL and the data lines DL may define a plurality of pixel units 40 on the display panel 10, and the pixel units 40 may include pixel circuits composed of thin film transistors and light emitting devices therein. The gate driver 30 may transmit a scan signal to the pixel circuits in the pixel unit 40 through the scan line GL, the driving device 20 of the display panel may transmit a data voltage to the pixel circuits in the pixel unit 40 through the data line DL, and the pixel circuits of the pixel unit 40 may perform a light emitting display at a corresponding brightness according to the received data voltage under the control of the scan signal.
Fig. 2 is a schematic structural diagram of a pixel circuit provided in an embodiment of the present invention, where the pixel circuit may be a pixel circuit in the pixel unit 40 shown in fig. 1, and fig. 2 schematically shows a case where the pixel circuit is composed of seven thin film transistors and one storage capacitor, and as shown in fig. 2, the pixel circuit includes a driving transistor DT, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, and a storage capacitor Cst. The operation phase of the pixel circuit at least comprises an initialization phase, a data writing phase and a light emitting phase, in the initialization phase, the initialization voltage Vint can be written into the gate electrode of the driving transistor DT and the storage capacitor Cst through the third transistor T3 to realize the initialization of the storage capacitor and the gate electrode potential of the driving transistor Cst, and the initialization of the anode potential of the light emitting device D1 is realized through the fourth transistor T4 to write into the anode of the light emitting device D1. In the data writing phase, the data voltage Vdata may be written into the storage capacitor Cst through the first transistor T1, the driving transistor DT, and the second transistor T2. In the light emitting stage, the first power voltage ELVDD is written to the first electrode of the driving transistor DT through the fifth transistor T5, the second power voltage ELVSS is written to the cathode of the light emitting device D1, and the driving transistor DT generates a driving current according to the data voltage Vdata stored in the storage capacitor Cst to drive the light emitting device D1 to emit light.
Referring to fig. 1 and 2, the driving device 20 of the display panel may be a driving chip, and the driving voltage adjusting module 210 and the display brightness compensating module 220 may be disposed in the driving chip of the display device. The driving device 20 of the display panel may transmit a data voltage Vdata to the pixel circuit through the data line DL, and transmit a first power voltage ELVDD, a second power voltage ELVSS, and an initialization voltage Vint to the pixel circuit. Optionally, in the embodiment of the present invention, the driving voltage corresponding to the display brightness level includes at least one of a power supply voltage and an initialization voltage Vint, where the power supply voltage is the second power supply voltage ELVSS. Alternatively, in other embodiments of the present invention, when the driving voltage includes the power supply voltage, the power supply voltage may further include the first power supply voltage ELVDD. To optimize the performance of the Display device, different driving voltages can be provided to the Display panel 10 by the Display panel driving device 20 according to different Display Brightness Values (DBV) set by a user.
A brightness adjustment button or a brightness adjustment bar is usually included in the display device, and a user can set the display brightness level of the display device by the brightness adjustment button or by sliding the brightness adjustment bar. Each display brightness level can correspond to one display brightness value of the maximum gray scale in the display picture of the display device, and after the display brightness value corresponding to the maximum gray scale in the display picture is changed, the display brightness values corresponding to other gray scales are also changed. For example, when the display brightness value corresponding to the maximum gray scale in the display frame is increased, the display brightness values corresponding to other gray scales are also increased; when the display brightness value corresponding to the maximum gray scale in the display picture is reduced, the display brightness values corresponding to other gray scales are also reduced. That is, when the display brightness value corresponding to the maximum gray scale in the display picture is larger, the display brightness level is larger, and the overall display brightness of the display picture is larger; when the display brightness value corresponding to the maximum gray scale in the display picture is smaller, the display brightness level is smaller, and the overall display brightness of the display picture is smaller.
Fig. 3 is a schematic diagram of a curve between a display brightness level before compensation and a display brightness value according to an embodiment of the present invention, where the curve may be a curve between a display brightness level before compensation and a display brightness value corresponding to a maximum gray scale, where a horizontal axis represents the display brightness level DBV and a vertical axis represents the display brightness value LV corresponding to the maximum gray scale, and taking a range of the display brightness level as 3500-4100 level as an example, a minimum value of the display brightness level of the display panel is 3500 and a maximum value of the display brightness level is 4100; taking the display luminance value corresponding to the maximum gray scale as 600-800nit as an example, the display luminance value corresponding to the maximum gray scale corresponding to the minimum value of the display luminance levels is 600nit, and the display luminance value corresponding to the maximum gray scale corresponding to the maximum value of the display luminance levels is 800 nit.
With reference to fig. 1 to 3, for example, a plurality of display brightness level intervals may be included between the minimum value 3500 of the display brightness level and the maximum value 4100 of the display brightness level, and in order to improve the performance of the display device, the driving voltage of the display panel 10 may be adjusted by the driving voltage adjusting module 210 according to the interval to which the display brightness level set by the user belongs, so as to provide the corresponding driving voltage for the display panel 10 through the driving device 20 of the display panel. One display brightness level section may correspond to one driving voltage, and a curve corresponding to each display brightness level section in fig. 3 schematically indicates a corresponding driving voltage and a section end point, where a driving voltage corresponding to a display brightness level section to which a minimum value 3500 of a display brightness level belongs is-1.5V, a driving voltage corresponding to a display brightness level section to which a maximum value 4100 of a display brightness level belongs is-2.5V, and as the display brightness level increases, the driving voltage corresponding to each display brightness level section sequentially changes, for example, may sequentially decrease, and decreases by 0.1V each time. The driving voltage may include a second power voltage ELVSS and/or an initialization voltage Vint, and when the driving voltage is the second power voltage ELVSS, the driving voltage adjusting module 210 may adjust the second power voltage ELVSS of the display panel 10 according to a section to which a display luminance level set by a user belongs, where an absolute value of the second power voltage ELVSS is greater when the display luminance level is greater, and is smaller when the display luminance level is smaller, which may help to reduce power consumption of the display device and extend a standby time of the display device. When the driving voltage is the initialization voltage Vint, the driving voltage adjusting module 210 may set the initialization voltage Vint corresponding to each display brightness level interval according to the display effect of each display brightness level interval, and different display brightness level intervals correspond to different initialization voltages Vint, so as to optimize the display effect.
Although the performance of the display device can be improved by adjusting the driving voltage of the display panel 10 according to the section to which the display brightness level belongs through the driving voltage adjusting module 210, in the process of adjusting the display brightness level of the display device by the user, because the driving voltages corresponding to the adjacent display brightness level intervals are different, and the relationship between the data voltages corresponding to different driving voltages and the display brightness values is different, when the display brightness level is adjusted from the level value in one section to the level value in another section, due to the variation of the driving voltage, the display brightness value of the maximum gray scale corresponding to the adjacent display brightness level interval has a step, that is, the curves at the respective driving voltage switching positions shown in fig. 3 have steps, and when the user adjusts the display luminance level of the display device, the step problem appears as a flickering phenomenon of the display device.
Fig. 4 is a schematic diagram of a curve of the compensated display luminance level and the display luminance value provided by the embodiment of the present invention, and fig. 4 may be a curve of the display luminance level and the display luminance value of the maximum gray scale obtained after the display luminance value is compensated in the compensation stage according to the display luminance level in fig. 3 and the corresponding driving voltage and the display luminance value of the maximum gray scale. The compensation phase may be a phase before the display device is put into use, for example, the phase may be a debugging phase before the display device is shipped from a factory. In conjunction with fig. 1 to 4, for example, in the compensation stage, while the driving voltage of the display panel 10 is adjusted by the driving voltage adjusting module 210 according to the section to which the display brightness level belongs, the display brightness level, the driving voltage corresponding to the display brightness level, and the display brightness value of the maximum gray scale may be transmitted to the display brightness compensating module 220, and the display brightness compensating module 220 may compensate the display brightness value of the maximum gray scale corresponding to each display brightness level, for example, the display brightness value in the curve shown in fig. 3 is an actual display brightness value, a target display brightness value corresponding to the actual display brightness value is preset by the display brightness compensating module 220, and the actual display brightness value of the maximum gray scale corresponding to each display brightness level is compensated, so that each actual display brightness value can be approximately equal to its corresponding target display brightness value, when the target display brightness values corresponding to adjacent display brightness levels are continuous, the actual display luminance values corresponding to the compensated adjacent display luminance levels can also be made continuous. The actual display brightness value is approximately equal to the target display brightness value corresponding to the actual display brightness value, which means that the difference between the actual display brightness value and the target display brightness value corresponding to the actual display brightness value is smaller than a preset difference, the preset difference can be set according to requirements, the target display brightness values corresponding to adjacent display brightness levels are continuous, which means that the difference between the target display brightness values corresponding to the adjacent display brightness levels is smaller than a preset threshold, and the preset threshold can be set according to requirements. As shown in fig. 4, after compensation, when the display luminance level is adjusted from the level value in one interval to the level value in another interval, the driving voltage is still changed according to the original rule, but the display luminance values of the maximum gray scales corresponding to the adjacent display luminance level intervals are continuous (i.e., the difference between the display luminance values of the maximum gray scales corresponding to the end points connected to the adjacent display luminance level intervals is smaller than the preset threshold), the curve at the switching point of each driving voltage is smooth, and when the driving voltage is changed, the display luminance value of the maximum gray scale does not have a sudden change.
In the technical scheme of the embodiment of the invention, the driving device for arranging the display panel comprises a driving voltage adjusting module and a display brightness compensating module, in the compensation stage, the driving voltage of the display panel is adjusted through the driving voltage adjusting module according to the interval to which the display brightness grade belongs, meanwhile, the display brightness level, the corresponding driving voltage and the display brightness value of the maximum gray scale are transmitted to the display brightness compensation module, and the display brightness compensation module compensates the display brightness value of the maximum gray scale corresponding to each display brightness level, so that the display brightness values of the maximum gray scales corresponding to the compensated adjacent display brightness levels are continuous, and thus, when the display brightness levels are adjusted, even if the driving voltages corresponding to the adjacent display brightness level intervals are different, the display brightness value of the maximum gray scale corresponding to the adjacent display brightness level intervals does not have sudden change. Compared with the prior art, when driving voltage includes mains voltage, this scheme helps reducing display device's consumption, when extension display device's stand-by time, alleviates the splash screen phenomenon of display device when showing the regulation of brightness level, and when driving voltage includes initialization voltage, this scheme helps when optimizing display effect, alleviates the splash screen phenomenon of display device when showing the regulation of brightness level, and then promotes display device's performance.
It should be noted that the driving voltages of-2.4V to-1.5V shown in fig. 3 and 4 are illustrated by taking the driving voltage as the second power supply voltage ELVSS as an example, and the driving voltages corresponding to different display luminance level intervals are linearly changed by 0.1V each time. In practical applications, the driving voltage may include at least one of the second power voltage ELVSS and the initialization voltage Vint, and the driving voltages corresponding to different display luminance level intervals may change linearly or nonlinearly, that is, the amplitude of each change of the driving voltages corresponding to different display luminance level intervals may be different. When the driving voltage is the initialization voltage Vint, for example, if the driving transistor in the pixel circuit is a P-type transistor, it may be configured that the absolute value of the initialization voltage Vint corresponding to each display luminance level section is sequentially increased with the increase of the display luminance level, and the initialization voltage Vint corresponding to each section is specifically set in combination with the actual display effect. According to the driving device of the display panel provided by the embodiment of the invention, the driving voltage of the display panel is adjusted by the driving voltage adjusting module according to the section to which the display brightness level belongs, and meanwhile, the display brightness value of the maximum gray scale corresponding to each display brightness level is compensated by the display brightness compensation module, so that the display brightness values of the maximum gray scales corresponding to adjacent display brightness level sections can be continuous no matter the driving voltage is the second power supply voltage ELVSS or the initialization voltage Vint, and no matter the driving voltage is linearly changed or nonlinearly changed, so that the performance of the display device is improved, and the screen flicker phenomenon of the display device during the adjustment of the display brightness level is relieved.
Referring to fig. 1, optionally, the display brightness compensation module 220 is specifically configured to determine an endpoint value of the display brightness level interval corresponding to the driving voltage, and compensate the display brightness value corresponding to the endpoint value of the display brightness level interval, so that the display brightness values corresponding to the endpoint values of adjacent display brightness level intervals are continuous.
Specifically, with reference to fig. 1, 3 and 4, the display luminance compensation module 220 may determine a display luminance level interval corresponding to each driving voltage and an endpoint value of the interval according to each received display luminance level, the driving voltage corresponding to each display luminance level, and the display luminance value of the maximum gray scale, where the endpoint value of the display luminance level interval refers to a minimum value of the display luminance level and a maximum value of the display luminance level in each display luminance level interval. Illustratively, the display brightness compensation module 220 presets a target display brightness value corresponding to the actual display brightness value, and compensates the actual display brightness value of the maximum gray scale corresponding to the endpoint value of each display brightness level interval, so that the actual display brightness value is approximately equal to the corresponding target display brightness value, and when the target display brightness values corresponding to the endpoint values of the adjacent display brightness level intervals are continuous, the actual display brightness values corresponding to the endpoint values of the adjacent display brightness level intervals after compensation can be also continuous. Because the end point of the driving voltage in the adjacent display brightness level interval changes, the scheme can enable the display brightness level of the driving voltage switching position and the curve of the display brightness value to be smoother, so that the sudden change of the display brightness value of the driving voltage switching position can be relieved to a certain extent, and the screen flashing phenomenon of the display device is further relieved.
On the basis of the above scheme, optionally, when compensating the display luminance values corresponding to the end points of the display luminance level interval, the display luminance values of the maximum gray scale corresponding to each display luminance level except the minimum value (i.e., the minimum display luminance level of the first display luminance level interval) and the maximum value (i.e., the maximum display luminance level of the last display luminance level interval) of all the display luminance levels may be compensated, so that the display luminance values corresponding to the end points of the adjacent display luminance level intervals are continuous in each display luminance level except the minimum value and the maximum value of all the display luminance levels. For the minimum value and the maximum value in all the display brightness levels, the display brightness value of the corresponding maximum gray scale is not compensated, or the actual display brightness values corresponding to the two display brightness levels are directly used as respective target display brightness values during compensation, so that the continuity of the display brightness values corresponding to the end point values of the adjacent display brightness level intervals is not influenced, and the compensation mode of the display brightness values can be simplified.
Fig. 5 is a schematic block diagram of a driving apparatus for a display panel according to an embodiment of the present invention, and the driving apparatus for a display panel shown in fig. 5 may be an embodiment of the driving apparatus 20 for a display panel in the display apparatus shown in fig. 1. With reference to fig. 1 and fig. 5, on the basis of the above scheme, optionally, the display brightness compensation module 220 includes a compensation unit 221, a register unit 222 and a gamma adjustment unit 223, and the register unit 222 is electrically connected to the compensation unit 221 and the gamma adjustment unit 223 respectively;
the compensation unit 221 is configured to determine an endpoint value of the display brightness level interval corresponding to the driving voltage; the gamma adjusting unit 223 is configured to adjust the gamma data according to the target display brightness value and the actual display brightness value corresponding to the endpoint value, so as to adjust the display brightness compensation value in the register unit 222, and determine the target display brightness compensation value when the actual display brightness value corresponding to the endpoint value is equal to the target display brightness value as the display brightness compensation value corresponding to the endpoint value, and store the display brightness compensation value in the register unit 222; the register unit 222 is configured to feed back the display brightness compensation value corresponding to the endpoint value to the compensation unit 221;
wherein the target display brightness values corresponding to adjacent display brightness levels are continuous; the display brightness compensation value is a gamma data compensation value.
Specifically, referring to fig. 1 and 5, in the compensation phase, the driving voltage adjusting module 210 adjusts the driving voltage of the display panel 10 according to the section to which the display brightness level belongs, and transmits each display brightness level, the corresponding driving voltage, and the display brightness value of the maximum gray scale to the display brightness compensation module 220. The register unit 222 may store the display brightness compensation value corresponding to each display brightness level in the form of a register value, in the compensation stage, the compensation unit 221 may determine an endpoint value of the display brightness level interval when the driving voltage changes, the register unit 222 may release the initial display brightness compensation value corresponding to the endpoint value to the gamma adjustment unit 223, the gamma adjustment unit 223 may debug the actual display brightness value according to the target display brightness value corresponding to the endpoint value, debug the data voltage corresponding to the actual display brightness value by debugging the gamma data corresponding to the actual display brightness value until the actual display brightness value is equal to the target display brightness value, at this time, the gamma data compensation value is the target display brightness compensation value, the gamma adjustment unit 223 may use the target display brightness compensation value as the display brightness compensation value corresponding to the endpoint value of the display brightness level interval, and stores the display luminance compensation value in the register unit 222 instead of the corresponding initial display luminance compensation value. The register unit 222 may also feed back the display brightness compensation value corresponding to the endpoint value of each display brightness level interval to the compensation unit 221, so as to determine the display brightness compensation value corresponding to the other display brightness level values in the display brightness level interval according to the display brightness compensation value corresponding to the endpoint value of the display brightness level interval through the compensation unit 221, and release the display brightness compensation value corresponding to each display brightness level value to the gamma adjustment unit 223 through the register unit 222, so that the display brightness value of the maximum gray scale corresponding to each display brightness level can be compensated. Because the target display brightness values corresponding to the adjacent display brightness levels are continuous, the compensated display brightness values corresponding to the adjacent display brightness levels are continuous and continuous, so that the screen flickering phenomenon of the display device during display brightness level adjustment is relieved.
Alternatively, after the compensation stage, for example, at the stage of putting the display device into use, the driving device 20 of the display panel may control the driving voltage adjusting module 210 to adjust the driving voltage of the display panel 10 only according to the section to which the display brightness level belongs, and since the compensation stage is completed at this time, the register unit 222 stores the display brightness compensation value corresponding to each display brightness level value, and thus, it is not necessary to transmit data to the display brightness compensation module 220 through the driving voltage adjusting module 210.
Optionally, the display brightness level interval includes two end values, where the two end values are a first display brightness level value and a second display brightness level value, respectively, and the first display brightness level value is smaller than the second display brightness level value; the compensation unit is further used for determining a display brightness compensation value corresponding to each display brightness level in the display brightness level interval according to the first display brightness level value and the corresponding display brightness compensation value of the display brightness level interval, and the second display brightness level value and the corresponding display brightness compensation value of the display brightness level interval.
Fig. 6 is a comparison diagram of curves of display luminance levels and display luminance values before and after compensation according to an embodiment of the present invention, where a solid line curve shown in fig. 6 is a curve of the display luminance levels and the display luminance values of the maximum gray scale before compensation, and a dotted line curve is a curve of the display luminance levels and the display luminance values of the maximum gray scale after compensation. This embodiment will be described in detail below with reference to fig. 6 as an example. Exemplarily, fig. 6 shows a case where three display luminance level sections [ DBV11, DBV12], [ DBV21, DBV22], and [ DBV31, DBV32] are included between the DBV11 and the DBV32, with the minimum value of the display luminance level being DBV11 and the maximum value of the display luminance level being DBV 32. Taking an interval [ DBV21, DBV22] as an example, a first display brightness level value of the interval is DBV21, a second display brightness level value is DBV22, a target display brightness value corresponding to an actual display brightness value of a maximum gray scale is preset by the display brightness compensation module 220, where the preset target display brightness value is a compensated display brightness value, an actual display brightness value corresponding to DBV21 is LV21, and the target display brightness value is LV21', and by compensating gamma data corresponding to the actual display brightness value LV21, a display brightness value corresponding to the display brightness level value DBV21 reaches the target display brightness value LV21', so as to obtain a display brightness compensation value corresponding to the display brightness level value DBV21, which is offset 21. The actual display brightness value corresponding to the DBV22 is LV22, the target display brightness value is LV22', and the display brightness value corresponding to the display brightness gradation value DBV22 reaches the target display brightness value LV22' by compensating the gamma data corresponding to the actual display brightness value LV22, so as to obtain the display brightness compensation value corresponding to the display brightness gradation value DBV22, which is offset 22.
The compensation unit 221 may determine the display luminance compensation values corresponding to other display luminance levels within the interval [ DBV21, DBV22] according to the display luminance level value DBV21 and the corresponding display luminance compensation value offset21, and the display luminance level value DBV22 and the corresponding display luminance compensation value offset22, for example, the display luminance level and the display luminance compensation value may be in a linear relationship, determine the specific functional relationship between the display luminance level value DBV21 and the corresponding display luminance compensation value offset21, and the display luminance level value DBV22 and the corresponding display luminance compensation value offset22, and then calculate the display luminance compensation values corresponding to other display luminance levels within the interval according to the functional relationship between the display luminance level value and the display luminance compensation value, and further compensate the display luminance value of the maximum gray scale corresponding to each display luminance level within the interval, to alleviate the phenomenon of screen flickering of the display device.
With reference to fig. 6, optionally, for the display brightness level sections [ DBV11, DBV12] to which the minimum value DBV11 of the display brightness level belongs and the display brightness level sections [ DBV31, DBV32] to which the maximum value DBV32 of the display brightness level belongs, the actual display brightness values may be compensated according to the target display brightness values corresponding to the display brightness level values to obtain the display brightness compensation values corresponding to the display brightness level values, and then the display brightness compensation values corresponding to the other display brightness levels in the display brightness level sections are calculated according to the endpoint values of each display brightness level section and the display brightness compensation values corresponding thereto. When the compensation unit 221 compensates the minimum value DBV11 of the display brightness level and the maximum value DBV32 of the display brightness level, it may directly use the actual display brightness value corresponding to each display brightness level as the target display brightness value, and further determine the display brightness compensation value, for example, when the display brightness compensation value represents a coefficient multiplied by gamma data corresponding to the actual display brightness value, the display brightness compensation values corresponding to the minimum value DBV11 of the display brightness level and the maximum value DBV32 of the display brightness level may both be 1.
Referring to fig. 5, based on the above scheme, optionally, the display brightness compensation value varies linearly with respect to the display brightness level, the compensation unit 221 is specifically configured to determine a variation amplitude of the display brightness compensation value with respect to the display brightness level according to the first display brightness level value and the display brightness compensation value corresponding thereto, and determine the display brightness compensation value corresponding to each display brightness level in the display brightness level interval according to the variation amplitude of the display brightness compensation value with respect to the display brightness level, and the endpoint value of the display brightness level interval and the display brightness compensation value corresponding thereto.
For example, assuming that a display brightness level interval is [ DBV1, DBV2], where DBV1 is a first display brightness level value, DBV2 is a second display brightness level value, offsetA is a display brightness compensation value corresponding to the first display brightness level value, and offsetB is a display brightness compensation value corresponding to the second display brightness level value, when the display brightness compensation value is a linear function with respect to the display brightness level, the display brightness compensation values corresponding to other display brightness levels in the display brightness level interval may be determined according to a change magnitude of the display brightness compensation value with respect to the display brightness level, and any one endpoint value of the display brightness level interval and its corresponding display brightness compensation value.
Alternatively, the magnitude K of the change of the display luminance compensation value with respect to the display luminance level is expressed as:
K＝(offsetB-offsetA)/(DBV2-DBV1)；
accordingly, the display luminance compensation value offset corresponding to the display luminance level value DBVi (DBV1 < DBVi < DBV2) in the interval can be expressed as:
offseti＝offsetA+K(DBVi-DBV1)；
or may also be expressed as:
offseti＝offsetB-K(DBV2-DBVi)。
with reference to fig. 1 and 5, optionally, the driving device 20 of the display panel further includes a source driver 230, and the source driver 230 is electrically connected to the gamma adjusting unit 223; the compensation unit 221 is further configured to output a corresponding display brightness compensation value to the register unit 222 according to the input display brightness level; the gamma adjusting unit 223 is further configured to output gamma data to the source driver 230 according to the display brightness compensation value in the register unit 222, so as to implement compensation of the display brightness value through compensation of the gamma data; the source driver 230 is used for generating a data voltage according to the gamma data and transmitting the data voltage to the display panel 10.
Illustratively, the driving apparatus 20 of the display panel further includes an application processor 240, an interface 250, and a memory 260, and the application processor 240, the interface 250, the memory 260, and the gamma adjusting unit 223 are electrically connected in sequence. The Application Processor (AP) 240 may transmit the image data to the Memory 260 through the Interface 250 for storage, where the Interface 250 may be a Mobile Industry Processor Interface (MIPI), and the Memory 260 may be a Random Access Memory (RAM). In the compensation stage, the compensation unit 221 is further configured to output a corresponding display brightness compensation value to the register unit 222 according to a display brightness level input by a user, the gamma adjustment unit 223 may generate gamma data according to the display brightness compensation value in the register unit 222 and the image data in the memory 260, and transmit the gamma data to the source driver 230, where the gamma data may include a gamma register value corresponding to a display brightness value of each gray scale (including a maximum gray scale) at the display brightness level input by the user, and the source driver 230 may convert the gamma data according to the received image data to obtain a corresponding data voltage. The driving device 20 of the display panel compensates the gamma data by the display brightness compensation value corresponding to the display brightness level, and further compensates the display brightness value to alleviate the screen splash phenomenon of the display device.
Optionally, on the basis of the above solutions, the present embodiment further describes the function of the driving device of the display panel. Table 1 schematically shows a set of display brightness levels DBV and their corresponding drive voltages, target display brightness values, actual display brightness values and display brightness compensation values. With reference to table 1, in the present embodiment, the driving voltage is the second power voltage ELVSS, the range of the display luminance level DBV is 2047-. Illustratively, in conjunction with fig. 1 and 5, in the compensation phase, the driving voltage adjusting module 210 adjusts the second power supply voltage ELVSS of the display panel 10 according to the section to which the display luminance level belongs, the second power supply voltage ELVSS corresponding to the display luminance level section [3892, 4095] to which the maximum value 4095 of the display luminance level belongs is-2.5V, the second power supply voltage ELVSS corresponding to the minimum value 2047 of the display luminance level (which includes only one display luminance level) is-1.5V, and the second power supply voltage ELVSS corresponding to adjacent display luminance level sections linearly changes and sequentially changes by 0.1V for other sections within the range from the maximum value to the minimum value of the display luminance level. The display brightness compensation module 220 may compensate the actual display brightness value according to the target display brightness value corresponding to the endpoint value of each display brightness level interval, so as to obtain a display brightness compensation value when the actual display brightness value is equal to the corresponding target display brightness value, where the target display brightness values corresponding to the endpoint values of adjacent display brightness level intervals are continuous, and optionally, the target display brightness values corresponding to the endpoint values of the adjacent display brightness level intervals may change linearly.
Since the actual display luminance values corresponding to the end point values of the section to which the maximum value 4095 of the display luminance levels belongs and the section to which the minimum value 2047 of the display luminance levels belongs are close to the target display luminance value, the end point value of each display luminance level section corresponds to one display luminance compensation value except for the two sections. For example, for the display luminance level interval [3686, 3891] in which the second power supply voltage ELVSS is-2.4V, the display luminance compensation value corresponding to the display luminance level 3891 is offset1_ a, the display luminance compensation value corresponding to the display luminance level 3686 is offset1_ B, and when the actual display luminance value corresponding to the display luminance level 3891 is compensated, the gamma data offset1_ a and Vsource required for debugging the actual display luminance value 768nit to the target display luminance value 780nit can be determined, where the display luminance compensation value offset1_ a is the gamma data compensation value and Vsource is the gamma data corresponding to the actual display luminance value 768nit (for example, when the gamma data is the gamma register value, the display luminance compensation value offset1_ a is the gamma register value compensation value).
TABLE 1
Figure BDA0003145387340000191
After the display brightness compensation values corresponding to the endpoint values of the display brightness level intervals are obtained, the display brightness compensation module 220 may calculate the display brightness compensation values corresponding to the other display brightness levels in the display brightness level intervals, for example, for the display brightness level interval [3686, 3891], the display brightness compensation value corresponding to the display brightness level 3891 is offset1_ a, and the display brightness compensation value corresponding to the display brightness level 3686 is offset1_ B, and perform a linear difference operation according to the two sets of endpoint values, so that the display brightness compensation values corresponding to the other display brightness levels in the interval may be automatically calculated, and the display brightness compensation values corresponding to the display brightness levels in the other display brightness level intervals may be calculated accordingly.
TABLE 2
Figure BDA0003145387340000201
Table 2 schematically shows a set of display brightness levels DBV and their corresponding drive voltages and display brightness compensation values. With reference to table 2, optionally, in this embodiment, the driving voltage varies linearly, the range of the driving voltage is M to N, and the range of the display brightness level DBV is DBV _ M to DBV _ N, for example, the description is given. The driving voltage may be the second power voltage ELVSS or the initialization voltage Vint, and for each interval from the maximum value to the minimum value of the display luminance levels, the driving voltages corresponding to adjacent display luminance level intervals are linearly changed and sequentially changed by 0.1V. The above embodiments can be referred to for determining the display brightness compensation value corresponding to the endpoint value of each display brightness level interval. For other display brightness levels within the display brightness level interval except for the endpoint values, the change amplitude K1 of the display brightness compensation value with respect to the display brightness level can be determined according to the change amplitude of the display brightness compensation value within an interval, for example, for the display brightness level interval [ end of DBV segment, beginning of DBV segment ]:
k1 ═ offset a-offset b)/(DBV _ segment start-DBV _ segment end).
Fig. 7 is a schematic structural diagram of another display device provided in the embodiment of the present invention, and with reference to fig. 1 and 7, the display device 100 may be an electronic device with a display function, such as a mobile phone, a computer, a tablet computer, and the like, and fig. 7 only schematically illustrates a case where the display device 100 is a mobile phone. The display device provided by the embodiment of the present invention includes the display panel 10 and the driving device 20 provided by any of the above embodiments of the present invention, so that the display device has the corresponding structure and beneficial effects of the driving device of the display panel, and the detailed description is omitted here.
The embodiment of the invention also provides a driving method of a display panel, and fig. 8 is a flow diagram of the driving method of the display panel provided by the embodiment of the invention. The driving method of the display panel provided by the embodiment of the present invention can be executed by the driving apparatus of the display panel provided by any of the above embodiments of the present invention, and referring to fig. 1, the driving apparatus 20 of the display panel includes: the driving voltage adjusting module 210 and the display brightness compensating module 220, wherein the driving voltage adjusting module 210 is electrically connected with the display brightness compensating module 220; accordingly, as shown in FIG. 8,
the driving method of the display panel comprises the following steps:
s110, adjusting the driving voltage of the display panel through the driving voltage adjusting module according to the interval to which the display brightness grade belongs, and transmitting the display brightness grade, the driving voltage corresponding to the display brightness grade and the display brightness value to the display brightness compensating module in the compensating stage.
And S120, compensating the display brightness value through the display brightness compensation module in a compensation stage so as to enable the display brightness values corresponding to adjacent display brightness levels of the display panel under different driving voltages to be continuous.
The display device comprises a display brightness level control circuit, a display brightness level control circuit and a display brightness level control circuit, wherein a plurality of display brightness level intervals are arranged between the minimum value of the display brightness level and the maximum value of the display brightness level, one display brightness level interval corresponds to one driving voltage, and the driving voltages corresponding to different display brightness level intervals are different; the driving voltage includes at least one of a power supply voltage and an initialization voltage.
In the technical scheme of the embodiment of the invention, the driving device for arranging the display panel comprises a driving voltage adjusting module and a display brightness compensating module, in the compensation stage, the driving voltage of the display panel is adjusted through the driving voltage adjusting module according to the interval to which the display brightness grade belongs, meanwhile, the display brightness level, the corresponding driving voltage and the display brightness value of the maximum gray scale are transmitted to the display brightness compensation module, and the display brightness compensation module compensates the display brightness value of the maximum gray scale corresponding to each display brightness level, so that the display brightness values of the maximum gray scales corresponding to the compensated adjacent display brightness levels are continuous, and thus, when the display brightness levels are adjusted, even if the driving voltages corresponding to the adjacent display brightness level intervals are different, the display brightness value of the maximum gray scale corresponding to the adjacent display brightness level intervals does not have sudden change. Compared with the prior art, when driving voltage includes mains voltage, this scheme helps reducing display device's consumption, when extension display device's stand-by time, alleviates the splash screen phenomenon of display device when showing the regulation of brightness level, and when driving voltage includes initialization voltage, this scheme helps when optimizing display effect, alleviates the splash screen phenomenon of display device when showing the regulation of brightness level, and then promotes display device's performance.
On the basis of the foregoing scheme, optionally, step S120 specifically includes:
and determining an endpoint value of a display brightness grade interval corresponding to the driving voltage through the display brightness compensation module, and compensating the display brightness value corresponding to the endpoint value of the display brightness grade interval so as to ensure that the display brightness values corresponding to the endpoint values of the adjacent display brightness grade intervals are continuous.
With reference to fig. 1 and fig. 5, on the basis of the above scheme, optionally, the display brightness compensation module 220 includes a compensation unit 221, a register unit 222 and a gamma adjustment unit 223, the register unit 222 being electrically connected to the compensation unit 221 and the gamma adjustment unit 223, respectively; correspondingly, step S120 specifically includes:
adjusting gamma data according to a target display brightness value and an actual display brightness value corresponding to the endpoint value through a gamma adjusting unit to realize adjustment of a display brightness compensation value in a register unit, determining the target display brightness compensation value when the actual display brightness value corresponding to the endpoint value is equal to the target display brightness value as the display brightness compensation value corresponding to the endpoint value, and storing the display brightness compensation value in the register unit; feeding back a display brightness compensation value corresponding to the endpoint value to the compensation unit through the register unit; wherein the target display brightness values corresponding to adjacent display brightness levels are continuous; the display brightness compensation value is a gamma data compensation value.
On the basis of the above scheme, optionally, the display brightness level interval includes two endpoint values, where the two endpoint values are a first display brightness level value and a second display brightness level value, respectively, and the first display brightness level value is smaller than the second display brightness level value; accordingly, step S120 further includes:
and determining the display brightness compensation value corresponding to each display brightness grade in the display brightness grade interval through the compensation unit according to the first display brightness grade value and the corresponding display brightness compensation value of the display brightness grade interval, the second display brightness grade value and the corresponding display brightness compensation value of the display brightness grade interval.
On the basis of the above scheme, optionally, the display brightness compensation value varies linearly with respect to the display brightness level; correspondingly, the determining, by the compensation unit, the display brightness compensation value corresponding to each display brightness level in the display brightness level interval according to the first display brightness level value and the corresponding display brightness compensation value thereof, and the second display brightness level value and the corresponding display brightness compensation value thereof specifically includes:
determining a change amplitude of the display brightness compensation value relative to the display brightness grade according to the first display brightness grade value and the corresponding display brightness compensation value thereof, and determining a display brightness compensation value corresponding to each display brightness grade in the display brightness grade interval according to the second display brightness grade value and the corresponding display brightness compensation value thereof, and the end point value of the display brightness grade interval and the corresponding display brightness compensation value thereof;
alternatively, the magnitude of the change of the display luminance compensation value with respect to the display luminance level is represented as:
K＝(offsetB-offsetA)/(DBV2-DBV1)；
where K is a variation amplitude of the display brightness compensation value with respect to the display brightness level, DBV1 is a first display brightness level value, DBV2 is a second display brightness level value, offset a is a display brightness compensation value corresponding to the first display brightness level value, and offset b is a display brightness compensation value corresponding to the second display brightness level value.
With reference to fig. 1 and 5, optionally, the driving device 20 of the display panel further includes a source driver 230, and the source driver 230 is electrically connected to the gamma adjusting unit 223; correspondingly, the method for determining the display brightness compensation value corresponding to each display brightness level in the display brightness level interval by the compensation unit according to the first display brightness level value and the corresponding display brightness compensation value of the display brightness level interval, and the second display brightness level value and the corresponding display brightness compensation value thereof further comprises the following steps:
and S210, outputting a corresponding display brightness compensation value to the register unit through the compensation unit according to the input display brightness level.
And S220, outputting the gamma data to the source driver through the gamma adjusting unit according to the display brightness compensation value in the register unit, so as to compensate the display brightness value through the compensation of the gamma data.
And S230, generating a data voltage according to the gamma data through the source driver and transmitting the data voltage to the display panel.
The driving method of the display panel provided in the embodiments of the present invention can be executed by the driving apparatus of the display panel provided in any of the embodiments of the present invention, and thus, has the corresponding beneficial effects of the driving apparatus of the display panel, and is 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 (10)

1. A driving apparatus of a display panel, comprising: the display device comprises a driving voltage adjusting module and a display brightness compensation module, wherein the driving voltage adjusting module is electrically connected with the display brightness compensation module;
the driving voltage adjusting module is used for adjusting the driving voltage of the display panel according to the interval to which the display brightness grade belongs, and transmitting the display brightness grade and the corresponding driving voltage and display brightness value to the display brightness compensation module in a compensation stage;
the display brightness compensation module is used for compensating the display brightness value in a compensation stage so as to enable the display brightness value corresponding to the adjacent display brightness levels of the display panel under different driving voltages to be continuous;
the display device comprises a display brightness level range, a driving voltage and a driving voltage, wherein a plurality of display brightness level ranges are arranged between the minimum value of the display brightness levels and the maximum value of the display brightness levels, one display brightness level range corresponds to one driving voltage, and the driving voltages corresponding to different display brightness level ranges are different; the driving voltage includes at least one of a power supply voltage and an initialization voltage.
2. The device according to claim 1, wherein the display brightness compensation module is specifically configured to determine an endpoint value of the display brightness level interval corresponding to the driving voltage, and compensate the display brightness value corresponding to the endpoint value of the display brightness level interval, so that the display brightness values corresponding to the endpoint values of the adjacent display brightness level intervals are continuous.
3. The driving apparatus of a display panel according to claim 2, wherein the display brightness compensation module comprises a compensation unit, a register unit and a gamma adjustment unit, the register unit being electrically connected to the compensation unit and the gamma adjustment unit, respectively;
the compensation unit is used for determining an endpoint value of the display brightness grade interval corresponding to the driving voltage; the gamma adjusting unit is used for adjusting gamma data according to a target display brightness value and an actual display brightness value corresponding to the endpoint value so as to adjust a display brightness compensation value in the register unit, determining the target display brightness compensation value when the actual display brightness value corresponding to the endpoint value is equal to the target display brightness value as the display brightness compensation value corresponding to the endpoint value, and storing the display brightness compensation value in the register unit; the register unit is used for feeding back the display brightness compensation value corresponding to the endpoint value to the compensation unit;
wherein the target display brightness values corresponding to adjacent display brightness levels are consecutive; the display brightness compensation value is a gamma data compensation value.
4. The apparatus according to claim 3, wherein the display brightness level section comprises two end values, which are a first display brightness level value and a second display brightness level value, respectively, and the first display brightness level value is smaller than the second display brightness level value;
the compensation unit is further configured to determine a display brightness compensation value corresponding to each display brightness level in the display brightness level interval according to the first display brightness level value and the display brightness compensation value corresponding to the first display brightness level value in the display brightness level interval, and the second display brightness level value and the display brightness compensation value corresponding to the second display brightness level value.
5. The apparatus according to claim 4, wherein the display brightness compensation value varies linearly with respect to the display brightness level, the compensation unit is specifically configured to determine a variation amplitude of the display brightness compensation value with respect to the display brightness level according to the first display brightness level value and the corresponding display brightness compensation value thereof, and the second display brightness level value and the corresponding display brightness compensation value thereof, and determine a display brightness compensation value corresponding to each of the display brightness levels in the display brightness level interval according to the variation amplitude of the display brightness compensation value with respect to the display brightness level, and an endpoint value of the display brightness level interval and the corresponding display brightness compensation value thereof;
preferably, the magnitude of the change of the display luminance compensation value with respect to the display luminance level is represented as:
K＝(offsetB-offsetA)/(DBV2-DBV1)；
wherein, K is the change amplitude of the display brightness compensation value about the display brightness level, DBV1 is the first display brightness level value, DBV2 is the second display brightness level value, offset a is the display brightness compensation value corresponding to the first display brightness level value, and offset b is the display brightness compensation value corresponding to the second display brightness level value.
6. The driving apparatus of a display panel according to claim 4, further comprising a source driver electrically connected to the gamma adjusting unit;
the compensation unit is also used for outputting a corresponding display brightness compensation value to the register unit according to the input display brightness grade; the gamma adjusting unit is further used for outputting gamma data to the source driver according to the display brightness compensation value in the register unit so as to realize compensation of the display brightness value through compensation of the gamma data; the source driver is used for generating data voltage according to the gamma data and transmitting the data voltage to the display panel.
7. A display device comprising a display panel and a driving device of the display panel according to any one of claims 1 to 6.
8. A driving method of a display panel, characterized by being performed by a driving apparatus of a display panel, the driving apparatus of the display panel comprising: the display device comprises a driving voltage adjusting module and a display brightness compensation module, wherein the driving voltage adjusting module is electrically connected with the display brightness compensation module;
the driving method includes:
adjusting the driving voltage of the display panel through the driving voltage adjusting module according to the interval to which the display brightness grade belongs, and transmitting the display brightness grade and the corresponding driving voltage and display brightness value to the display brightness compensating module in a compensating stage;
compensating the display brightness value through the display brightness compensation module in a compensation stage so as to enable the display brightness value corresponding to the adjacent display brightness levels of the display panel under different driving voltages to be continuous;
the display device comprises a display brightness level range, a driving voltage and a driving voltage, wherein a plurality of display brightness level ranges are arranged between the minimum value of the display brightness levels and the maximum value of the display brightness levels, one display brightness level range corresponds to one driving voltage, and the driving voltages corresponding to different display brightness level ranges are different; the driving voltage includes at least one of a power supply voltage and an initialization voltage.
9. The method according to claim 8, wherein the compensating the display brightness value by the display brightness compensation module in a compensation phase to make the display brightness values corresponding to adjacent display brightness levels of the display panel under different driving voltages continuous comprises:
and determining an endpoint value of the display brightness grade interval corresponding to the driving voltage through the display brightness compensation module, and compensating the display brightness value corresponding to the endpoint value of the display brightness grade interval so as to ensure that the display brightness value corresponding to the endpoint value of the adjacent display brightness grade interval is continuous.
10. The driving method of the display panel according to claim 9, wherein the display brightness compensation module includes a compensation unit, a register unit and a gamma adjustment unit, the register unit being electrically connected to the compensation unit and the gamma adjustment unit, respectively;
compensating the display brightness value by the display brightness compensation module in a compensation stage so that the display brightness values corresponding to adjacent display brightness levels of the display panel under different driving voltages are continuous, specifically comprising:
determining an endpoint value of the display brightness grade interval corresponding to the driving voltage through the compensation unit;
adjusting gamma data according to a target display brightness value and an actual display brightness value corresponding to the endpoint value through the gamma adjusting unit to realize adjustment of a display brightness compensation value in the register unit, determining the target display brightness compensation value when the actual display brightness value corresponding to the endpoint value is equal to the target display brightness value as the display brightness compensation value corresponding to the endpoint value, and storing the display brightness compensation value in the register unit;
feeding back the display brightness compensation value corresponding to the endpoint value to the compensation unit through the register unit;
wherein the target display brightness values corresponding to adjacent display brightness levels are consecutive; the display brightness compensation value is a gamma data compensation value.
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CN112509519A (en) * 2020-10-20 2021-03-16 厦门天马微电子有限公司 Display panel driving method and display device
CN112581896A (en) * 2020-12-10 2021-03-30 昆山国显光电有限公司 Display panel and compensation method and compensation device thereof
CN112950657A (en) * 2021-03-29 2021-06-11 合肥京东方显示技术有限公司 Gamma value correction method, gamma value correction device, electronic device, and readable storage medium

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CN114420071B (en) * 2022-01-28 2023-08-25 Oppo广东移动通信有限公司 Brightness calibration method, brightness calibration device, electronic equipment and storage medium
CN114387920A (en) * 2022-02-16 2022-04-22 武汉华星光电半导体显示技术有限公司 OLED display device and brightness driving method thereof
WO2023155254A1 (en) * 2022-02-16 2023-08-24 武汉华星光电半导体显示技术有限公司 Oled display device and brightness driving method thereof
US11798494B2 (en) 2022-02-16 2023-10-24 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. OLED display device and brightness driving method thereof
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