CN111754914B - Gamma debugging method and device for display module and display module - Google Patents
Gamma debugging method and device for display module and display module Download PDFInfo
- Publication number
- CN111754914B CN111754914B CN202010611816.3A CN202010611816A CN111754914B CN 111754914 B CN111754914 B CN 111754914B CN 202010611816 A CN202010611816 A CN 202010611816A CN 111754914 B CN111754914 B CN 111754914B
- Authority
- CN
- China
- Prior art keywords
- brightness level
- brightness
- point
- gamma
- interval
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
-
- 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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- 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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
Abstract
The embodiment of the invention discloses a gamma debugging method and device for a display module and the display module, wherein the display brightness level of the display module is divided into a plurality of dimming intervals, the dimming intervals at least comprise a first data voltage dimming interval and a second data voltage dimming interval, and the first brightness level tie point is the maximum display brightness level of the display module; the power supply voltage corresponding to the second brightness level binding point is greater than the power supply voltage corresponding to the first brightness level binding point, the maximum voltage of the gamma circuit corresponding to the second brightness level binding point is less than the maximum voltage corresponding to the first brightness level binding point, and the minimum voltage corresponding to the second brightness level binding point is greater than the minimum voltage corresponding to the first brightness level binding point; in the first data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit, and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed. According to the technical scheme, the power consumption of the display module can be reduced and the gamma debugging efficiency can be improved at the same time.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a gamma debugging method, a gamma debugging device and a display module.
Background
With the development of display technologies, the image quality requirements for display products are also increasing.
In the prior art, generally, according to the sequence of display brightness levels from high to low, the range from the highest display brightness level to a certain display brightness level is generally a data voltage dimming range, and at least two sets of gamma circuits are debugged in the data voltage dimming range to improve the image quality of the display panel.
Disclosure of Invention
The invention provides a display module gamma debugging method and device and a display module, which are used for saving power consumption, shortening gamma debugging time of the display module and improving production line capacity.
In a first aspect, an embodiment of the present invention provides a gamma debugging method for a display module, including:
dividing the display brightness level of the display module into a plurality of dimming intervals, wherein the plurality of dimming intervals at least comprise a first data voltage dimming interval and a second data voltage dimming interval, the second data voltage dimming interval is continuous with the first data voltage dimming interval, and interval endpoints of the second data voltage dimming interval are respectively a first brightness level binding point and a second brightness level binding point, wherein the first brightness level binding point is the maximum display brightness level of the display module; the power supply voltage corresponding to the second brightness level binding point is greater than the power supply voltage corresponding to the first brightness level binding point, the maximum voltage of the gamma circuit corresponding to the second brightness level binding point is less than the maximum voltage corresponding to the first brightness level binding point, and the minimum voltage of the gamma circuit corresponding to the second brightness level binding point is greater than the minimum voltage corresponding to the first brightness level binding point; in the first data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed;
in the first data voltage dimming interval, calculating gamma register values under other brightness level binding points according to a reference curve corresponding to second brightness level binding points in the first data voltage dimming interval, wherein the reference curve is a relation curve between the gamma register values under the second brightness level binding points in the first data voltage dimming interval and the brightness of each first binding point;
wherein each brightness level binding point corresponds to a set of gamma register values.
In a second aspect, an embodiment of the present invention further provides a gamma debugging apparatus for a display module, including:
the display module comprises a dividing module, a first dimming module, a second dimming module and a control module, wherein the dividing module is used for dividing the display brightness level of the display module into a plurality of dimming intervals, the plurality of dimming intervals at least comprise a first data voltage dimming interval and a second data voltage dimming interval, the second data voltage dimming interval is continuous with the first data voltage dimming interval, the interval endpoints of the second data voltage dimming interval are respectively a first brightness level binding point and a second brightness level binding point, and the first brightness level binding point is the maximum display brightness level of the display module; the power supply voltage corresponding to the second brightness level binding point is greater than the power supply voltage corresponding to the first brightness level binding point, the maximum voltage corresponding to the second brightness level binding point is less than the maximum voltage corresponding to the first brightness level binding point, and the minimum voltage corresponding to the second brightness level binding point is greater than the minimum voltage corresponding to the first brightness level binding point; in the first data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed;
the calculation module is used for calculating gamma register values under other brightness level binding points according to a reference curve corresponding to a second brightness level binding point in a first data voltage dimming interval in the first data voltage dimming interval, wherein the reference curve is a relation curve between the gamma register values under the second brightness level binding point in the first data voltage dimming interval and the brightness of each first binding point;
wherein each brightness level binding point corresponds to a set of gamma register values.
In a third aspect, an embodiment of the present invention further provides a display module, where the display module performs gamma debugging by using the gamma debugging method for the display module provided in the first aspect.
According to the gamma debugging method, the gamma debugging device and the line module of the display module, provided by the embodiment of the invention, the display brightness level of the display module is divided into a plurality of dimming intervals; the plurality of dimming intervals at least comprise a first data voltage dimming interval and a second data voltage dimming interval, wherein the second data voltage dimming interval is continuous with the first data voltage dimming interval, interval endpoints of the second data voltage dimming interval are respectively a first brightness level binding point and a second brightness level binding point, a power supply voltage corresponding to the second brightness level binding point is set to be greater than a power supply voltage corresponding to the first brightness level binding point, a maximum voltage corresponding to the second brightness level binding point is smaller than a maximum voltage of a gamma circuit corresponding to the first brightness level binding point, and a minimum voltage of the gamma circuit corresponding to the second brightness level binding point is greater than a minimum voltage corresponding to the first brightness level binding point; so that the display module can keep lower power consumption. And in the interval of adjusting luminance through setting up first data voltage, the PWM duty cycle, gamma circuit's maximum voltage and minimum voltage, and the mains voltage to emitting device negative pole access in the display module assembly is fixed, can realize in first data voltage interval of adjusting luminance, according to the reference curve that second brightness level tie point corresponds in first data voltage interval of adjusting luminance calculate the gamma register value under other brightness level tie points, and then can make in two intervals of adjusting luminance in first data voltage interval of adjusting luminance and second data voltage interval of adjusting luminance, only need carry out gamma debugging under first brightness level tie point and second brightness level tie point can, the gamma register value that other brightness level tie points correspond all can be obtained through calculating, and then be favorable to improving gamma debugging efficiency. Therefore, compared with the prior art, the gamma debugging method provided by the embodiment can simultaneously realize the reduction of the power consumption of the display module and the improvement of the gamma debugging efficiency.
Drawings
FIG. 1 is a flowchart of a gamma debugging method for a display module according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a 7T1C pixel circuit commonly used in the prior art;
FIG. 3 is a flowchart illustrating another gamma adjustment method for a display module according to an embodiment of the present invention;
FIG. 4 is a relationship curve between binding gray scale and difference value corresponding to the display module according to the embodiment of the present invention;
FIG. 5 is a flowchart illustrating another gamma adjustment method for a display module according to an embodiment of the present invention;
FIG. 6 is a schematic illustration of a reference curve provided by an embodiment of the present invention;
fig. 7 is an enlarged view of a curve segment on a reference curve corresponding to a first binding luminance interval when a second binding luminance provided by an embodiment of the present invention is between a middle luminance corresponding to two endpoints and a second end luminance;
fig. 8 is an enlarged view of a curve segment on a reference curve corresponding to a first binding luminance interval when a second binding luminance provided by an embodiment of the present invention is between a middle luminance corresponding to two endpoints and a second end luminance;
fig. 9 is a schematic structural diagram of a gamma adjustment device for a display module according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the 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, in the prior art, generally, according to the sequence of display brightness levels from high to low, the display brightness level from the highest display brightness level to a certain display brightness level is generally a data voltage dimming interval, and at least two sets of gamma circuits are debugged in the data voltage dimming interval to improve the image quality of the display panel. The inventor has found that the above problems occur because, in the prior art, in order to save the power consumption of the high brightness section, in the data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit are generally set to be fixed values, however, the power voltage connected to the cathode of the light emitting device in the display module under the different brightness level binding points changes, and when the brightness corresponding to the brightness level binding points is lower, the power voltage connected to the cathode is increased (the power voltage is a negative value, so the absolute value of the power voltage is reduced when the power voltage is increased), in the data voltage dimming interval, the gamma register value can be calculated by adopting a certain algorithm only when the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage (in the embodiment of the invention, the power supply voltage points to the power supply voltage connected to the cathode of the light-emitting device in the display module) are fixed. Therefore, in the prior art, the gamma register value corresponding to the brightness level binding point cannot be obtained in a direct calculation manner, but only can be obtained in an actual debugging manner within the data voltage dimming interval. Specifically, for example, gamma debugging under one brightness level tie point is performed, a plurality of tie point gray scales are set under the brightness level tie point, gamma register values are continuously adjusted and display brightness is obtained until the obtained display brightness reaches target brightness corresponding to the tie point gray scales, the gamma register value corresponding to the target brightness is determined as the gamma register value corresponding to the tie point gray scale, and after adjustment and test are performed on each tie point gray scale, the gamma register value corresponding to each tie point gray scale is determined as a group of gamma register values under the brightness level tie point. The process of obtaining a set of gamma register value through the gamma debugging process under the binding point of a brightness level is known, the gamma debugging process is more complicated, obtain multiunit gamma register value through carrying out gamma debugging under the binding point of different brightness levels, and then the mode that increases gamma debugging group number causes gamma debugging time longer, and after obtaining multiunit gamma register value, still need burn the multiunit gamma register value to the driver chip, make burning record time also can corresponding extension, and debugging and burning record's constitution is accomplished on producing the line usually, consequently finally lead to producing line gamma debugging and burn record time and all lengthen, the production capacity is produced in the influence. Therefore, the prior art solution cannot simultaneously achieve both small power consumption and high gamma debugging efficiency.
Based on the above problem, an embodiment of the present invention provides a gamma debugging method for a display module, fig. 1 is a flowchart of the gamma debugging method for a display module provided by the embodiment of the present invention, and referring to fig. 1, the gamma debugging method for a display module includes:
the plurality of dimming intervals at least comprise a first data voltage dimming interval and a second data voltage dimming interval, wherein the second data voltage dimming interval is continuous with the first data voltage dimming interval, and interval endpoints of the second data voltage dimming interval are respectively a first brightness level tie point and a second brightness level tie point, wherein the first brightness level tie point is the maximum display brightness level of the display module; the power supply voltage corresponding to the second brightness level binding point is greater than the power supply voltage corresponding to the first brightness level binding point, the maximum voltage corresponding to the second brightness level binding point is less than the maximum voltage of the gamma circuit corresponding to the first brightness level binding point, and the minimum voltage of the gamma circuit corresponding to the second brightness level binding point is greater than the minimum voltage corresponding to the first brightness level binding point; in the first data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit, and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed.
Specifically, a Display device such as a mobile phone or a computer generally includes a Brightness adjustment key, and a user changes an input Display Brightness level (DBV), which is also called a Display Brightness Value (Display Brightness Value). The display brightness corresponding to the maximum gray scale in each display brightness level is different, and after the display brightness corresponding to the maximum gray scale in the display panel is changed, the display brightness corresponding to other gray scales is also changed. Specifically, when the display brightness corresponding to the maximum gray scale in the display panel is increased, the display brightness corresponding to other gray scales is also increased; when the display brightness corresponding to the maximum gray scale in the display panel is reduced, the display brightness corresponding to other gray scales is also reduced. That is, when the display brightness corresponding to the maximum gray scale in the display panel is larger, the brightness level is larger, and the overall display brightness of the display panel is larger; when the display brightness corresponding to the maximum gray scale in the display panel is smaller, the brightness level is smaller, and the whole display brightness of the display panel is smaller.
Specifically, the plurality of dimming intervals at least include a first data voltage dimming interval and a second data voltage dimming interval, wherein the second data voltage dimming interval is continuous with the first data voltage dimming interval, and interval endpoints of the second data voltage dimming interval are respectively a first brightness level tie point and a second brightness level tie point, wherein the first brightness level tie point is a maximum display brightness level of the display module. Here, for the data voltage dimming interval (including the first data voltage dimming interval, the second data voltage dimming interval, and the third data voltage dimming interval in the following embodiments) in any embodiment of the present invention, the PWM duty ratio is a constant value, and the following embodiments of the present invention can be referred to for specific explanation of the PWM duty ratio. The brightness level tie point is a certain display brightness level (specifically, which display brightness levels are selected as the brightness level tie points, which may be set by a person skilled in the art according to experience, or calculated according to a set calculation manner, etc.), and when gamma debugging or calculation is performed, a group of gamma register values under the brightness level tie point needs to be obtained. In this embodiment, the power supply voltage corresponding to the second brightness level binding point is set to be greater than the power supply voltage corresponding to the first brightness level binding point, and the larger the power supply voltage is, the smaller the absolute value of the power supply voltage is. Fig. 2 is a schematic diagram of a 7T1C pixel circuit commonly used in the prior art, in which the power voltage is connected to the first power voltage input terminal ELVSS, and the voltage provided to the second power voltage input terminal ELVDD of the pixel circuit is constant. Because the first brightness level tie point is the maximum display brightness level of the display module, the power voltage corresponding to the first brightness level tie point is set to be smaller, so that the voltage difference between the second power voltage input end ELVDD and the first power voltage input end ELVSS is larger, and the light-emitting device D1 can be ensured to reach the maximum brightness corresponding to the maximum display brightness level. Because the second brightness level binding point is smaller than the first brightness level binding point, and therefore, the maximum brightness corresponding to the second brightness level binding point is smaller than the maximum brightness corresponding to the first brightness level binding point, the power voltage corresponding to the second brightness level binding point is set to be larger than the power voltage corresponding to the first brightness level binding point, accordingly, the voltage difference between the second power voltage input end ELVDD and the first power voltage input end ELVSS at the second brightness level binding point can be smaller than the voltage difference between the second power voltage input end ELVDD and the first power voltage input end ELVSS at the first brightness level binding point, and the larger the voltage difference between the second power voltage input end ELVDD and the first power voltage input end ELVSS is, the larger the power consumption of the display module is, so that on the basis that the light emitting device D1 can reach the maximum brightness corresponding to the second brightness level binding point at the second display brightness level, so that the display module has smaller power consumption.
The maximum voltage of the gamma circuit corresponding to the second brightness level binding point is smaller than the maximum voltage of the gamma circuit corresponding to the first brightness level binding point, and the minimum voltage of the gamma circuit corresponding to the second brightness level binding point is larger than the minimum voltage of the gamma circuit corresponding to the first brightness level binding point. Specifically, the gamma circuit may include a first voltage terminal, a second voltage terminal, and a voltage dividing resistor between the first voltage terminal and the second voltage terminal, wherein the first voltage terminal may access a maximum voltage, the second voltage terminal may access a minimum voltage, and the gamma circuit controls a voltage divided by each voltage dividing resistor according to the upper limit circuit and the minimum voltage, and further controls an output of the gamma circuit to control data voltages corresponding to different gray scales. In the driver chip, the range of gamma register values is fixed, e.g., the range of gamma registers is 0-4095. In the prior art, in the second data voltage dimming interval and the first data voltage dimming interval, that is, in any display brightness level in the second data voltage dimming interval and the first data voltage dimming interval, the maximum voltage of the gamma circuit and the minimum voltage corresponding to the gamma circuit remain unchanged, and then the range of the gamma register value corresponding to the maximum display brightness level (the first brightness level tie point) is 0 to 4095, for example, the gamma register value corresponding to the minimum gray scale in the maximum display brightness level may be 4095, and the gamma register value corresponding to the maximum gray scale may be 0; because the maximum brightness (i.e., the brightness corresponding to the maximum gray scale) under the second brightness level binding point is less than the maximum brightness under the first brightness level binding point, the gamma register corresponding to the minimum gray scale is 4095 under the second brightness level binding point, and the gamma register value corresponding to the maximum gray scale is greater than 0, for example, the gamma register value corresponding to the maximum gray scale is 2000, the range of the gamma register value under the second brightness level binding point is only 2000-4095, and taking the gray scale range of 0-255 as an example, the range of the gamma register value corresponding to the 0-255 gray scale under the second brightness level binding point is only 2000-4095, so the gamma debugging precision is deteriorated. In this embodiment, the maximum voltage of the gamma circuit corresponding to the second brightness level binding point is less than the maximum voltage of the gamma circuit corresponding to the first brightness level binding point, the minimum voltage of the gamma circuit corresponding to the second brightness level binding point is greater than the minimum voltage of the gamma circuit corresponding to the first brightness level binding point, namely, the second brightness level binding point, the maximum voltage and the minimum voltage of the gamma circuit are changed, and the gamma register value corresponding to the maximum voltage is fixed, i.e., the minimum value 0 of the corresponding gamma register value, the gamma register value corresponding to the minimum voltage is also fixed, namely, the maximum value 4095 of the gamma register values, so that the range of the gamma register values corresponding to the 0-255 gray scale is also 0-4095 under the second brightness level binding, and the gamma debugging precision under the second brightness level binding can be further improved.
And, the calculation standard of the corresponding relation between the gamma register value and the data voltage is the same only when the PWM duty ratio corresponding to different display brightness levels, the maximum voltage and the minimum voltage of the gamma circuit, and the power voltage accessed to the cathode of the light emitting device in the display module are the same. Therefore, in the first data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit, and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed, that is, in the first data voltage dimming interval, the PWM duty ratio corresponding to each display brightness level, the maximum voltage and the minimum voltage of the gamma circuit, and the power supply voltage connected to the cathode of the light emitting device in the display module are respectively the same, so that in the first data voltage dimming interval, the calculation standard of the corresponding relationship between the gamma register value and the data voltage is the same, and further, the gamma register value can be obtained by adopting a calculation method in the subsequent steps, and the time for gamma debugging is reduced. And because under the arbitrary display brightness level in the first data voltage dimming interval, the maximum voltage and the minimum voltage of the gamma circuit are equal and are respectively equal to the maximum voltage and the minimum voltage of the gamma circuit under the second brightness level tie point, namely the maximum voltage and the minimum voltage of the gamma voltage in the first data voltage dimming interval are different from those under the first brightness level tie point, the gamma debugging time is reduced on the basis of improving the gamma debugging precision. Optionally, in a plurality of brightness level tie points of display module assembly, second brightness level tie point is adjacent with first brightness level tie point, in second data voltage adjusts luminance the interval promptly, only include two brightness level tie points, because of in first data voltage adjusts luminance the interval, supply voltage size is inconsistent, consequently can't adopt the calculation mode to obtain the corresponding gamma register value of brightness level tie point, consequently set up in second data voltage adjusts luminance the interval, only include two brightness level tie points, be favorable to gamma debugging efficiency's improvement.
And each binding point gray scale corresponds to the display brightness under the condition that each first binding point brightness is the second brightness level binding point.
Specifically, as described above, in the first data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit, and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed, that is, in the first data voltage dimming interval, the PWM duty ratio corresponding to each display brightness level, the maximum voltage and the minimum voltage of the gamma circuit, and the power supply voltage connected to the cathode of the light emitting device in the display module are respectively the same, so that in the first data voltage dimming interval, the gamma register value corresponding to each brightness level binding point can be obtained in a calculation manner. Since the first data voltage dimming interval and the second data voltage dimming interval are consecutive, for example, the first brightness level is Hbm, the second brightness level is Nor1, the second data voltage dimming interval may be Hbm-Nor1, and the first data voltage dimming interval is Nor1-Norn, where Nor1 is an end point of the first data voltage dimming interval, and Norn indicates another end point of the first data voltage dimming interval. Therefore, the second brightness level tie point is the maximum display brightness level in the first data voltage dimming interval, the display brightness corresponding to the maximum gray scale is the maximum, and the display brightness corresponding to the minimum gray scale is usually 0, so that in the first data voltage dimming interval, the display brightness corresponding to each gray scale under other display brightness levels falls within the brightness range corresponding to the minimum gray scale to the maximum gray scale under the second brightness level tie point, and the trend of the relationship curve corresponding to the brightness of each brightness level tie point and the gamma register value is generally consistent, so in this step, the gamma register values under other brightness level tie points are calculated according to the reference curve corresponding to the second brightness level tie point in the first data voltage dimming interval to calculate the gamma register values under other brightness level tie points. Specifically, in the first data voltage dimming interval, the gamma register value under other brightness level tie points and the corresponding relation curve of tie point brightness can be a part of the reference curve, so that the gamma register value under other brightness level tie points can be calculated according to the reference curve, and then in the first data voltage dimming interval, only the gamma debugging is carried out under the second brightness level tie points, and further the gamma debugging time is saved. Wherein, the reference curve can be obtained according to the actual gamma adjustment under the second brightness level binding point.
In the gamma debugging method provided by this embodiment, the display brightness level of the display module is divided into a plurality of dimming intervals; the plurality of dimming intervals at least comprise a first data voltage dimming interval and a second data voltage dimming interval, wherein the second data voltage dimming interval is continuous with the first data voltage dimming interval, interval endpoints of the second data voltage dimming interval are respectively a first brightness level binding point and a second brightness level binding point, a power supply voltage corresponding to the second brightness level binding point is set to be greater than a power supply voltage corresponding to the first brightness level binding point, a maximum voltage corresponding to the second brightness level binding point is smaller than a maximum voltage of a gamma circuit corresponding to the first brightness level binding point, and a minimum voltage of the gamma circuit corresponding to the second brightness level binding point is greater than a minimum voltage corresponding to the first brightness level binding point; so that the display module can keep lower power consumption. And through setting up in the first data voltage interval of adjusting luminance, the PWM duty cycle, gamma circuit's maximum voltage and minimum voltage, and to the display module assembly in the power supply voltage of emitting device negative pole access fixed, can realize in the first data voltage interval of adjusting luminance, according to the reference curve that second brightness level tie point corresponds in the first data voltage interval of adjusting luminance gamma register value under other brightness level tie points of calculation, and then can make in two intervals of adjusting luminance of first data voltage interval of adjusting luminance and second data voltage interval of adjusting luminance, only need under first brightness level tie point and second brightness level tie point carry out gamma debugging can, gamma register value that other brightness level tie points correspond all can be obtained through the calculation, and then be favorable to improving gamma debugging efficiency. Therefore, compared with the prior art, the gamma debugging method provided by the embodiment can simultaneously realize the reduction of the power consumption of the display module and the improvement of the gamma debugging efficiency.
On the basis of the above technical solution, optionally, the plurality of dimming intervals further include a PWM dimming interval; in the PWM dimming interval, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage connected to the cathode of the light-emitting device in the display module are fixed;
fig. 3 is a flowchart of another gamma debugging method for a display module according to an embodiment of the present invention, and referring to fig. 3, the gamma debugging method for a display module further includes:
and step 230, in the PWM dimming interval, determining gamma data under other brightness level bindings according to a group of gamma data under the maximum brightness level binding point and a group of gamma data under the minimum brightness level binding point in the PWM dimming interval, wherein the gamma data comprise PWM duty ratios and gamma register values.
Specifically, the PWM dimming interval is a display brightness level interval for adjusting the display brightness at least by adjusting a PWM duty ratio in the pixel circuit, where the PWM duty ratio may be a low-level pulse width duty ratio or a high-level pulse width duty ratio of the light emission control signal. Optionally, in this embodiment, the PWM dimming interval adjusts the display brightness level interval of the display brightness by adjusting a low-level pulse width duty ratio (or a high-level pulse width duty ratio) of the light emission control signal in the pixel circuit and the data voltage provided to the pixel circuit, where the data voltage does not change significantly in the PWM dimming interval. With continuing reference to fig. 2, the pixel circuit 7T1C, where the light-emitting control signal is connected to the light-emitting control signal input end Emit, and the low-level pulse width duty ratio (or high-level pulse width duty ratio) of the light-emitting control signal is used to control the light-emitting time of the light-emitting device in one frame; the data voltage is connected to the data voltage input terminal Vdata, and the magnitude of the data voltage is used to control the driving current flowing through the light emitting device D1. The display panel is usually driven by a driving chip, that is, the driving chip provides a data voltage to the display panel, and the data voltage exists in the driving chip in the form of a gamma register value, so in this embodiment, the PWM dimming interval is a display brightness level interval for adjusting the display brightness by adjusting the low-level pulse width duty ratio (or the high-level pulse width duty ratio) of the light-emitting control signal in the pixel circuit and the gamma register value.
Specifically, the step 230 may include:
231, acquiring gamma data corresponding to the maximum brightness level binding point and gamma data corresponding to the minimum brightness level binding point in the PWM dimming interval; the gamma data comprises brightness and gamma register values corresponding to the binding point gray scale;
the binding point of the maximum brightness level in the PWM dimming interval can be the maximum display brightness level in the PWM dimming interval; the minimum brightness level binding point in the PWM dimming interval may be the minimum display brightness level in the PWM dimming interval.
Optionally, gamma debugging may be performed in advance under the maximum brightness level binding point within the PWM dimming interval to obtain duty ratio and gamma data corresponding to the maximum brightness level binding point; and performing gamma debugging in advance under the minimum display brightness level in the PWM dimming interval to obtain the minimum display brightness level, and performing gamma debugging to obtain a duty ratio and gamma data corresponding to the minimum display brightness level, wherein the gamma data comprise brightness corresponding to each binding point gray scale and a corresponding gamma register value. The binding gray level includes a maximum gray level, for example, when the display gray level ranges from 0 to 255 gray levels, the binding gray level includes 255 gray levels.
Step 232, determining the maximum brightness and the corresponding PWM duty ratio inserted into the brightness level binding point according to the gamma data corresponding to the first brightness level binding point and the PWM duty ratio or the gamma register value corresponding to the second brightness level binding point; the first brightness level binding point is the maximum brightness level binding point in the PWM dimming interval, and the second brightness level binding point is the minimum brightness level binding point in the PWM dimming interval; or the first brightness level binding point is the minimum brightness level binding point in the PWM dimming interval, and the second brightness level binding point is the maximum brightness level binding point in the PWM dimming interval.
Optionally, the PWM dimming interval sequentially includes level 1 to level m binding from large to small according to the display brightness level, where the maximum brightness level binding is the level 1 binding, the minimum display brightness level is the level m binding, and the inserting display brightness level includes level 2 to level (m-1) binding; wherein m is more than or equal to 3. Wherein the interpolated display brightness level is between the maximum brightness level binding and the minimum display brightness level.
Optionally, the first brightness level tie point is a maximum brightness level tie point in a PWM dimming interval, and the second brightness level tie point is a minimum brightness level tie point in the PWM dimming interval.
Optionally, the step 232 may include:
step 2321, determining the maximum brightness corresponding to the insertion display brightness level and the corresponding duty ratio according to the duty ratio and the maximum brightness corresponding to the maximum brightness level binding point and the maximum brightness corresponding to the minimum display brightness level; optionally, the maximum brightness corresponding to the inserted display brightness level is calculated according to the following formula:
Wherein L is q Representing the maximum brightness corresponding to the q-th level binding point; l is 1 Representing the corresponding maximum brightness under the maximum brightness level tie-point; l is m Representing the corresponding maximum brightness at the minimum display brightness level;
specifically, the maximum brightness corresponding to the maximum brightness level binding point is the brightness corresponding to the maximum display gray scale under the maximum brightness level binding point; the maximum luminance corresponding to the minimum display luminance level is the luminance corresponding to the minimum display gray scale at the minimum display luminance level. Within the PWM dimming interval, the maximum brightness corresponding to the maximum brightness level binding point and the maximum brightness corresponding to the minimum display brightness level are known.
Calculating the duty ratio corresponding to the inserted display brightness level according to the following formula:
wherein EM q Representing the duty ratio corresponding to the q-th level binding point, wherein q is more than or equal to 2 and less than or equal to (m-1); EM 1 Indicating the duty cycle corresponding to the maximum brightness level binding point.
Optionally, the step 232 may include:
step 2322, determining the maximum brightness corresponding to the insertion display brightness level and the corresponding duty ratio according to the duty ratio corresponding to the maximum brightness level binding point, the maximum brightness and the duty ratio corresponding to the minimum display brightness level; preferably, the maximum luminance corresponding to the interpolated display luminance level is calculated according to the following formula:
Wherein L is q Representing the maximum brightness corresponding to the q-th level binding point; l is 1 Representing the corresponding maximum brightness under the maximum brightness level tie point; EM 1 Indicating duty cycle, EM, corresponding to a maximum brightness level binding point m Indicating the duty ratio corresponding to the minimum display brightness level;
calculating the duty ratio corresponding to the inserted display brightness level according to the following formula:
wherein EM q And (3) representing the duty ratio corresponding to the q-th level binding point, wherein q is more than or equal to 2 and less than or equal to (m-1).
In the present embodiment, the step 2321 and the step 2322 are two parallel implementations of the step 232 under the condition that the first brightness level tie is the maximum brightness level tie in the PWM dimming interval, and the second brightness level tie is the minimum brightness level tie in the PWM dimming interval, that is, the step 2321 may be adopted to determine the maximum brightness corresponding to the inserted display brightness level and the corresponding duty ratio, and the step 2322 may also be adopted to determine the maximum brightness corresponding to the inserted display brightness level and the corresponding duty ratio. That is, the display brightness level (the display brightness level corresponds to the maximum brightness one-to-one, and after the maximum brightness is determined, the inserted display brightness level is determined) and the corresponding duty cycle in this embodiment may be determined according to the duty cycle corresponding to the maximum brightness level binding point, the maximum brightness corresponding to the maximum brightness level binding point, and the maximum brightness corresponding to the minimum display brightness level, or according to the duty cycle corresponding to the maximum brightness level binding point, the maximum brightness, and the duty cycle corresponding to the minimum display brightness level, so that the duty cycle corresponding to the inserted display brightness level does not need to be determined by debugging, which is beneficial to saving the debugging time.
Optionally, the first brightness level tie point is a minimum brightness level tie point in the PWM dimming interval, and the second brightness level tie point is a maximum brightness level tie point in the PWM dimming interval.
Optionally, the step 232 may include:
step 2323, determining the maximum brightness corresponding to the insertion display brightness level and the corresponding duty ratio according to the duty ratio and the maximum brightness corresponding to the minimum brightness level binding point and the maximum brightness corresponding to the maximum display brightness level; optionally, the maximum brightness corresponding to the inserted display brightness level is calculated according to the following formula:
L q ＝L m *λ (m-q) wherein
Wherein L is q Representing the maximum brightness corresponding to the q-th level binding point; l is 1 Representing the lower pair of maximum display brightness levelsThe corresponding maximum brightness; l is m Representing the corresponding maximum brightness at the minimum display brightness level;
calculating the duty ratio corresponding to the inserted display brightness level according to the following formula:
EM q ＝EM m *λ (m-q) ；
wherein EM q Representing the duty ratio corresponding to the q-th level binding point, wherein q is more than or equal to 2 and less than or equal to (m-1); EM m Indicating the duty cycle corresponding to the minimum display brightness level.
Optionally, the step 232 may include:
step 2324, determining the maximum brightness corresponding to the insertion display brightness level and the corresponding duty ratio according to the duty ratio corresponding to the minimum brightness level binding point, the maximum brightness and the duty ratio corresponding to the maximum display brightness level; optionally, the maximum brightness corresponding to the inserted display brightness level is calculated according to the following formula:
L q ＝L m *λ (m-q) wherein
Wherein L is q Representing the maximum brightness corresponding to the q-th level binding point; l is m Representing the corresponding maximum brightness at the minimum display brightness level; EM 1 Indicating the duty cycle, EM, corresponding to the maximum display brightness level m Indicating the duty ratio corresponding to the minimum display brightness level;
calculating the duty ratio corresponding to the inserted display brightness level according to the following formula:
EM q ＝EM m *λ (m-q) ；
wherein EM q Representing the duty ratio corresponding to the q-th level binding point, wherein q is more than or equal to 2 and less than or equal to (m-1); EM m Indicating the duty cycle corresponding to the minimum display brightness level.
In this embodiment, step 2323 and step 2324 are two parallel implementation manners of step 232 under the condition that the first brightness level tie is the minimum brightness level tie in the PWM dimming interval, and the second brightness level tie is the maximum brightness level tie in the PWM dimming interval.
Step 233, judging the magnitude relation between the binding point gray scale under the inserted brightness level binding point and a preset gray scale threshold value, and when the binding point gray scale under the inserted brightness level binding point is larger than the preset gray scale threshold value, calculating a gamma register value corresponding to the binding point gray scale according to a preset calculation formula;
the preset gray scale threshold value is determined by the difference distribution of a gamma register value obtained by actually carrying out gamma debugging on a preset number of display modules under the condition of inserting the brightness level tie point and a gamma register value obtained by calculating according to an initial linear calculation formula; the preset calculation formula is a correction formula of the initial linear formula according to the difference distribution.
Optionally, the initial linear calculation formula is: v qk ＝((q-1)*V mk +(m-q)*V 1k )/(m-1)；
Wherein, V qk Expressing a gamma register value corresponding to a kth binding point gray scale under the q-th level binding point; v 1k Expressing a gamma register value corresponding to a kth binding point gray scale under the 1 st level binding point, wherein k is more than or equal to 1 and less than or equal to p, and p represents the number of total binding point gray scales under the insertion of the brightness level binding points;
the preset calculation formula is as follows:
determining difference distribution of gamma register values obtained by actually carrying out gamma debugging on a preset number of display modules under the condition of inserting the brightness level tie points and gamma register values obtained by an initial linear calculation formula according to a and b, wherein Gray [ k ] represents the kth tie point Gray scale under the condition of inserting the brightness level tie points;
wherein, the determination process of a and b comprises the following steps:
drawing a relation curve of binding point gray scale and difference values according to the difference values of a gamma register value obtained by actually carrying out gamma debugging on the display module group under the condition of inserting the brightness level binding points and a gamma register value obtained by calculating an initial linear calculation formula;
and determining a and b according to the slope of the relation curve of the difference values corresponding to each display module and the maximum difference of the difference values corresponding to each display module under the same binding point gray scale.
Optionally, determining a and b according to the slope of the relationship curve of the difference value corresponding to each display module and the maximum difference of the difference value corresponding to each display module under the same binding point gray scale includes:
when the binding gray scale is between the preset gray scale threshold and the first binding gray scale,
a＝(R 1 -R th )/(Gray[k 1 ]-Gray[k th ])，
b＝-(R 1 -R th )*Gray[k th ]/(Gray[k 1 ]-Gray[k th ])+R th ，
wherein R is 1 The mean value of the difference value R corresponding to each display module under the first binding point gray scale under the insertion display brightness level th The average value of the difference values corresponding to each display module group under the preset Gray scale threshold value under the condition of indicating the insertion display brightness level, Gray [ k ] 1 ]Representing a first binding Gray level, Gray [ k ] th ]Representing a predetermined gray level threshold, where k 1 >k th And k is not less than 1 1 ≤p，1≤k th ≤p；
When the binding point gray scale is between the preset gray scale threshold and the first binding point gray scale, the positive slope and the negative slope of a relation curve between any two adjacent binding point gray scales are the same;
when the binding gray scale is smaller than a preset gray scale threshold, the maximum difference of the difference values corresponding to all the display modules under the same binding gray scale is larger than a first difference value threshold; when the binding gray scale is larger than the preset gray scale threshold value, the maximum difference of the difference values corresponding to the display modules is smaller than a first difference value threshold value.
Fig. 4 is a relationship curve between a binding point Gray scale and a difference value corresponding to the display module according to the embodiment of the present invention, wherein an abscissa Gray in fig. 4 represents a Gray scale, and an ordinate Rcl represents a difference value between a gamma register value obtained by actually performing gamma debugging on the display module at the display brightness level and a gamma register value obtained by an initial linear calculation formula. Referring to FIG. 4, FIG. 4 schematically shows the relationship between the binding gray scale and the difference value of four display modules at the same insertion display brightness level, which are respectively a curve 11, a curve 12, a curve 13 and a curve 14, andthe example is given by taking four display modules as the preset number of display modules. Referring to FIG. 4, the Gray level at the binding point is smaller and less than the preset Gray level threshold Gray [ k ] th ]During the process, the display modules are subjected to the difference discrete distribution of the gamma register value obtained by actually carrying out gamma debugging under the condition of inserting the display brightness level and the gamma register value obtained by an initial linear calculation formula, and under the same binding point Gray level, the maximum difference (namely the maximum difference) of the difference values corresponding to the display modules is large, at the moment, the curves corresponding to the display modules are also relatively disordered, so that the binding point Gray level is smaller than a preset Gray level threshold Gray [ k ] at the binding point Gray level th ]The difference cannot be characterized by a uniform calculation formula. And at the binding point Gray level greater than the preset Gray level threshold Gray k th ]At a predetermined Gray level threshold Gray k, for example th ]And a first binding Gray level Gray k 1 ]In the middle, on the corresponding relation curve of each display module, under any binding point Gray scale, the maximum difference of the difference values is smaller, the positive and negative slopes of the connecting line between any two adjacent binding points on the same relation curve are the same, and the slopes of the two same adjacent binding points on different relation curves are the same, so that the preset Gray scale threshold Gray [ k ] of any display panel is equal th ]And a first binding Gray level Gray k 1 ]The relationship between the Gray level threshold Gray k and the Gray level threshold Gray k can be approximately viewed as a straight line th ]Coordinate points formed by the corresponding difference values, and a first binding Gray level Gray [ k ] 1 ]The coordinate points formed by the corresponding difference values are two end points of the straight line respectively, and because the preset number of display modules are multiple and the relationship curves are in one-to-one correspondence with the display modules, the relationship curves are multiple, and the corresponding difference values of different relationship curves under the same binding point Gray scale may be different, therefore, the preset Gray scale threshold Gray k is used in the embodiment th ]And a preset Gray level threshold Gray k th ]Taking a coordinate point corresponding to the difference value average value corresponding to each lower display module under the first binding Gray scale as an endpoint of the straight line, and taking the first binding Gray scale k 1 ]And each display module group at the first binding Gray level Gray k 1 ]The coordinate point corresponding to the lower corresponding difference average value is used as the other end point of the straight line, and the straight line can be obtainedThe lines correspond to functions. When the binding gray scale is between the preset gray scale threshold and the first binding gray scale, the difference value corresponding to the binding gray scale is considered to be on the straight line, so that the corresponding difference value can be obtained through the function corresponding to the straight line and the binding gray scale.
The specific calculation process is as follows:
(R k -R th )/(Gray[k]-Gray[k th ])＝(R 1 -R th )/(Gray[k 1 ]-Gray[k th ])，
and then can obtain
R k ＝(R 1 -R th )/(Gray[k 1 ]-Gray[k th ])*Gray[k]-(R 1 -R th )*Gray[k th ]/(Gray[k 1 ]-Gray[k th ])+R th ，
Wherein R is k Representing any binding Gray level Gray [ k ] between the preset Gray level threshold and the first binding Gray level]A corresponding difference value; the formula is corresponding to a preset calculation formula,
can obtain
a＝(R 1 -R th )/(Gray[k 1 ]-Gray[k th ])，
b＝-(R 1 -R th )*Gray[k th ]/(Gray[k 1 ]-Gray[k th ])+R th 。
Optionally, when the binding gray scale is between the first binding gray scale and the second binding gray scale,
a＝(R 2 -R 1 )/(Gray[k 2 ]-Gray[k 1 ])；
b＝-(R 2 -R 1 )*Gray[k 1 ]/(Gray[k 2 ]-Gray[k 1 ])+R 1 ；
wherein R is 2 The mean value of the difference values corresponding to each display module group under the second binding Gray scale under the insertion display brightness level is shown, Gray [ k ] 2 ]Representing a second binding gray level; k is more than or equal to 1 2 ≤p，k 2 >k 1 ；
When the binding gray scale is between the first binding gray scale and the second binding gray scale, the positive slope and the negative slope of a relation curve between any two adjacent binding gray scales are the same;
the slope of a relation curve between the preset gray level threshold and the first binding gray level is opposite to the slope of a relation curve between the first binding gray level and the second binding gray level.
Specifically, with continued reference to FIG. 4, at the binding point Gray level is greater than the predetermined Gray level threshold Gray k th ]At a predetermined Gray level threshold, for example, the first binding Gray level Gray k 1 ]And a second binding Gray level Gray k 2 ]In the middle, on the relationship curve corresponding to each display module, under any binding point Gray scale, the maximum difference of the difference values is smaller, the positive and negative slopes of the connecting line between any two adjacent binding points on the same relationship curve are the same, and the slopes of the two adjacent binding points on different relationship curves are the same, so that for any display module, at the first binding point Gray scale k 1 ]And a second binding Gray level Gray k 2 ]The relationship between the Gray levels can be approximately viewed as a straight line, and the first binding Gray level Gray k 1 ]Coordinate points formed by the corresponding difference values and a second binding Gray level Gray [ k ] 2 ]And the corresponding difference values are two end points of the straight line respectively, because the preset number of display modules are multiple, the relationship curves are in one-to-one correspondence with the display modules, the relationship curves are multiple, the corresponding difference values of different relationship curves under the same binding point Gray scale may be different, and therefore, the first binding point Gray scale Gray k is adopted in the embodiment 1 ]And a first binding Gray level Gray k 1 ]Taking the coordinate point corresponding to the difference value average value corresponding to the first binding Gray scale of each lower display module as an end point of the straight line, and taking the second binding Gray scale Gray [ k ] 2 ]And each display module group at the second binding Gray level Gray k 2 ]And taking the coordinate point corresponding to the lower corresponding difference average value as the other end point of the straight line, and solving a function corresponding to the straight line. When the binding gray scale is between the first binding gray scale and the second binding gray scale, the difference value corresponding to the binding gray scale is considered to be on the straight line, so that the corresponding difference value can be obtained through the function corresponding to the straight line and the binding gray scale.
The specific calculation process is similar to the process when the binding point gray scale is between the preset gray scale threshold and the first binding point gray scale, and is not repeated herein, and finally, calculation formulas corresponding to a and b can be obtained.
Optionally, when the tie point gray level is between the second tie point gray level and the maximum gray level,
a＝0，b＝0；
when wherein the tie point gray scale when second tie point gray scale and maximum gray scale, under arbitrary tie point gray scale, the absolute value of the difference that each display module group corresponds is less than the absolute value of predetermineeing the difference, and wherein the absolute value of predetermineeing the difference is less than the absolute value of first difference, and first difference is the tie point gray scale when predetermineeing gray scale threshold value to second tie point gray scale between, on the relation curve of arbitrary difference, the difference that the tie point gray scale corresponds.
Specifically, when the tie point gray scale is between the second tie point gray scale and the maximum gray scale, the absolute value of the difference value corresponding to each display panel is smaller than the absolute value of the preset difference value, which may be short, and the absolute value of the preset difference value is close to 0, for example, the absolute value of the preset difference value is equal to 3; that is, when the tie point gray scale is between the second tie point gray scale and the maximum gray scale, the corresponding difference of each display module is small, and it can be considered that the difference is approximately 0, and then the gamma register value corresponding to the tie point gray scale is calculated according to the initial linear calculation formula, that is, a is 0, and b is 0.
It should be noted that fig. 4 only exemplifies that the preset number is 4, and the actual preset number may be a larger number, for example, far greater than four, and may be 100, 200, and the like, and the embodiment is not limited in detail herein.
Optionally, the plurality of dimming intervals further includes a hybrid dimming interval and a third data voltage dimming interval,
fig. 5 is a flowchart of another gamma adjustment method for a display module according to an embodiment of the present invention, and referring to the flowchart, the gamma adjustment method for a display module includes:
and in the third data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed.
Optionally, according to the sequence of the display brightness levels of the display modules from high to low, the second data voltage dimming interval, the first data voltage dimming interval, the hybrid dimming interval, the PWM dimming interval, and the third data voltage dimming interval are sequentially continuous.
Specifically, in the prior art, the lowest brightness segment is usually a hybrid dimming interval, where the hybrid dimming interval is a display brightness level interval in which display brightness is adjusted by adjusting a PWM duty cycle and a data voltage, and the data voltage changes significantly in the hybrid dimming interval, so that a gamma register value cannot be obtained in a calculation manner, and the data voltage adjustable range is very small in the lowest brightness segment, so that the gamma debugging difficulty is large, and the gamma debugging efficiency is affected. In this embodiment, the lowest brightness segment is used as the third data voltage dimming interval, and in the third data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit, and the power voltage connected to the cathode of the light emitting device in the display module are fixed, so that the gamma register value corresponding to the display brightness level in the third data voltage dimming interval is conveniently obtained through a calculation method, which may be the same as the calculation method in step 120, that is, the calculation is performed according to the relationship curve between the gamma register value corresponding to the maximum display brightness level in the third data voltage dimming interval and the tie point brightness, and details are not repeated here. And, will mix the luminance grade section that the interval setting is close to the middle zone in showing the luminance grade for the adjustable range of data voltage increases, and then is favorable to reducing the gamma debugging degree of difficulty, is favorable to the promotion of gamma debugging efficiency. And because of in the mixed light modulation interval, PWM duty cycle and gamma register value that different brightness level tie points correspond may have great difference, promptly when the gamma debugging, not only will carry out the debugging of PWM duty cycle, carry out the debugging of gamma register value again, therefore the time that the gamma debugging needs can be longer relatively, consequently, optionally, mixed light modulation interval includes two demonstration brightness level points, and then is favorable to shortening gamma debugging time.
Optionally, the third data voltage dimming interval includes two brightness level tie points, so that the time of gamma calculation in the third data voltage dimming interval can be shortened, and the gamma debugging efficiency can be improved.
Optionally, the first data voltage dimming interval and the PWM dimming interval include at least three brightness level bindings. Specifically, because of the interval and the PWM interval of adjusting luminance of first data voltage all can calculate gamma register value through the mode of calculation, and then set up the interval and the PWM interval of adjusting luminance of first data voltage and all include at least three brightness level tie, can increase gamma group number on the basis of guaranteeing gamma debugging efficiency, and then be favorable to the promotion of picture quality.
Illustratively, the brightness level bindings included in the order of the display brightness level from high to low are shown in table 1.
TABLE 1
Wherein the maximum brightness corresponding to the brightness level binding points gradually decreases from Hbm to Norm +1 (i.e., the brightness gradually decreases from L0 to Lm + 1), illustratively, the second data voltage dimming interval is Hbm-Nor1, the first data voltage dimming interval is Nor1-Nor, the hybrid dimming interval is Nor-Nor +1, the PWM dimming interval is Nor +1-Norm, and the third data voltage dimming interval is Norm-Norm +1, the present embodiment only needs to perform gamma adjustment at the brightness level tie points Hbm, Nor1, Nor +1, and Norm for the way of dividing the display brightness level into the dimming interval, gamma register values under other brightness level bindings can be obtained by calculation according to the gamma register values under the four brightness level bindings, and specifically, the gamma register values under the brightness level bindings (including Norn) in the first data voltage dimming interval can be obtained by calculation according to the gamma register values under Nor 1; because the mixed dimming interval is continuous with the first data voltage dimming interval, gamma debugging is only needed to be carried out under Norn +1 in the mixed dimming interval; because the mixed dimming interval is continuous with the PWM dimming interval, gamma debugging is only needed to be carried out under Norm in the PWM dimming interval; in addition, since the PWM dimming interval is continuous with the third data voltage dimming interval, in the third data voltage dimming interval, a set of gamma register values under Norm +1 is directly calculated according to the gamma register values under Norm; and then make the whole display brightness level of display module adjust luminance within range only need carry on 4 times gamma debug can, be favorable to further improving gamma debugging efficiency.
Optionally, the interval endpoints in the hybrid dimming interval are respectively a third brightness level tie and a fourth brightness level tie, and among the multiple brightness level ties of the display module, the third brightness level tie is adjacent to the fourth brightness level tie, and the third brightness level tie is greater than the fourth brightness level tie;
the power supply voltage corresponding to the fourth brightness level binding point is smaller than the power supply voltage corresponding to the third brightness level binding point, the maximum voltage corresponding to the fourth brightness level binding point is smaller than the maximum voltage corresponding to the third brightness level binding point, and the minimum voltage corresponding to the fourth brightness level binding point is larger than the minimum voltage corresponding to the third brightness level binding point.
Specifically, because the display brightness level corresponding to the fourth brightness level binding point in the hybrid dimming interval is relatively low, the power supply voltage corresponding to the fourth brightness level binding point is smaller than the power supply voltage corresponding to the third brightness level binding point, so that the low gray scale uniformity is better at a lower brightness level. In addition, the maximum voltage corresponding to the fourth brightness level binding point is set to be smaller than the maximum voltage corresponding to the third brightness level binding point, the minimum voltage corresponding to the fourth brightness level binding point is larger than the minimum voltage corresponding to the third brightness level binding point, the gamma debugging precision is favorably improved, the specific principle is the same as the principle of the relation between the maximum voltage corresponding to the first brightness level binding point and the second brightness level binding point and the relation between the maximum voltage and the minimum voltage, and the description is omitted.
Optionally, step 120, step 220, and step 320 in the above embodiments may all include:
step 21, acquiring a reference curve;
specifically, the reference curve may be obtained according to actual gamma debugging under the second brightness level tie point, where the reference curve may be a curve obtained by performing gamma debugging on any color sub-pixel in the display panel, and fig. 6 is a schematic diagram of the reference curve provided in the embodiment of the present invention, where an abscissa L represents brightness and an ordinate R represents a gamma register value.
Step 22, determining a register gain value corresponding to the second binding point brightness on a straight line connecting line according to two end point straight line connecting lines of the second binding point brightness corresponding to the first binding point brightness interval belonging to the reference curve under the condition that the brightness level to be calculated is bound in the first data voltage dimming interval;
specifically, the step 22 may include:
determining an interval formed by taking the maximum first binding brightness smaller than the second binding brightness and the minimum first binding brightness larger than the second binding brightness on the reference curve as interval endpoints as a first binding brightness interval to which the second binding brightness belongs;
determining the slope of the straight line connection line according to the first end point brightness and the corresponding first gamma register value, the second end point brightness and the corresponding second gamma register value,
wherein, the first and the second end of the pipe are connected with each other,
where k denotes the slope of the straight line connecting line, R i+1 Represents the second gammaRegister value, R i Representing a first gamma register value, L i+1 Indicating a second endpoint brightness, L i Representing a first endpoint brightness; the first endpoint brightness and the second endpoint brightness are respectively two endpoint brightness of the first binding point brightness interval, and the first endpoint brightness is smaller than the second endpoint brightness;
determining a register gain value corresponding to the second tie point brightness on the straight line connecting line according to the slope of the straight line connecting line and the second tie point brightness;
wherein R is Lk ＝k(L k -L i )+R i ，
Wherein R is Lk Representing the register gain value, L k Representing a second tie point intensity.
Step 23, determining a target register offset value corresponding to the second binding luminance according to a preset corresponding relationship between the target register offset value corresponding to the second binding luminance and a preset midpoint offset value corresponding to the middle luminance of the two end points, wherein in the preset corresponding relationship, the target register offset value is positively correlated with the preset midpoint offset value, the target register offset value is negatively correlated with an absolute value of a first luminance difference value, and the first luminance difference value is a difference value between the second binding luminance and the middle luminance of the two end points;
optionally, step 23 may include:
when the second binding point brightness is between the first endpoint brightness and the middle brightness corresponding to the two endpoints, determining a preset corresponding relation according to the similarity between a first triangle with the first endpoint, the corresponding point of the second binding point brightness on the straight line connecting line, the corresponding point of the second binding point brightness on the reference curve as the vertex, the middle point of the straight line connecting line and a second triangle with the corresponding point of the middle brightness of the two endpoints on the reference curve as the vertex;
when the second binding point brightness is between the middle brightness and the second end point brightness corresponding to the two end points, determining a preset corresponding relation according to the similarity of the second end point, a corresponding point of the second binding point brightness on a straight line connecting line, a third triangle with the corresponding point of the second binding point brightness on a reference curve as a vertex, the second end point, a middle point of the straight line connecting line, and a fourth triangle with the corresponding point of the middle brightness of the two end points on the reference curve as a vertex; the first endpoint is a corresponding point of the first endpoint brightness of the first binding brightness interval on the reference curve, the second endpoint is a corresponding point of the second endpoint brightness of the first binding brightness interval on the reference curve, and the first endpoint brightness is smaller than the second endpoint brightness;
determining a target register offset value according to the preset corresponding relation and the preset midpoint offset value;
preferably, the preset corresponding relationship is
Wherein, O k Indicating a register offset value, O mid Represents a predetermined midpoint offset value, L i+1 Denotes the first endpoint luminance, L i Indicating a second endpoint brightness, L k Representing the register gain value.
Fig. 7 is an enlarged view of a curve segment on a reference curve corresponding to a first binding luminance interval when the second binding luminance is between the middle luminance corresponding to two endpoints and the second endpoint luminance according to an embodiment of the present invention. Referring to fig. 7, the second binding luminance L k Brightness L between the first end point i Intermediate luminance L corresponding to both end points mid In between, the first triangle Δ S1S0S0 'with the vertex corresponding to the first endpoint S1, the second tie point brightness S0 on the straight line connecting line, and the second triangle Δ S1S3S 3' with the vertex corresponding to the second tie point brightness S0 'on the reference curve is similar to the first endpoint S1, the middle point S3 of the straight line connecting line, and the vertex corresponding to the middle brightness S3' on the reference curve, and according to the similar property of the two triangles, it can be known that the corresponding sides of the first triangle Δ S1S0S0 'and the second triangle Δ S1S3S 3' are proportional, and there is a ratio between the corresponding sides of the first triangle Δ S1S0S0 'and the second triangle Δ S1S3S 3', and there is a ratio between
Wherein, | S0S0'| represents the distance between points S0 and S0', that is to saySecond binding Point luminance L k The corresponding target register offset value Ok, | S3S3'| represents the distance between the point S3 and the point S3', that is, the preset midpoint offset value Omid; i S1S0| represents the length of straight-line segment S1S0, | S0S3| represents the length of straight-line segment S0S3, | S1S3| represents the length of straight-line segment S1S 3.
While
Thus, can obtain
Fig. 8 is an enlarged view of a curve segment on a reference curve corresponding to a first binding luminance interval when a second binding luminance is between a middle luminance and a second end luminance corresponding to two end points according to an embodiment of the present invention, and fig. 8 shows a second binding luminance L k Intermediate brightness L between two end points mid And a second end lighting luminance L i+1 The case in between. Referring to fig. 8, the second binding luminance L k Intermediate brightness L between two endpoints mid And a second end luminance L i+1 In between, the third triangle Δ S2S0S 0' with the second endpoint S2, the middle point S3 of the straight line connection, and the fourth triangle Δ S2S3S 3' with the corresponding point S3' of the reference curve as the vertex of the middle brightness of the two endpoints are similar to the third triangle Δ S2S0S 0' with the second endpoint S1, the corresponding point S0 of the second tie point brightness on the straight line connection, and the corresponding point S0' of the second tie point brightness on the reference curve as the vertex, so according to the similar property of the two triangles, it can be known that the corresponding sides of the third triangle Δ S2S0S 0' and the fourth triangle Δ S2S3S 3' are proportional, and there is a proportion of the corresponding sides of the third triangle Δ S2S0S 0' and the fourth triangle Δ S2S3S 3', and there is a proportion of the corresponding sides
Where, | S0S0'| represents the distance between the points S0 and S0', i.e., the second binding luminance L k Corresponding target register biasThe shift value Ok, | S3S3'| represents the distance between the point S3 and the point S3', that is, the preset midpoint offset value Omid; | S2S0| represents the length of straight-line segment S2S0, | S0S3| represents the length of straight-line segment S0S3, and S2S3 represents the length of straight-line segment S2S 3.
While
Thus, can obtain
Summarizing a calculation formula of the target register offset value corresponding to the second binding luminance when the second binding luminance is between the first endpoint luminance and the intermediate luminance corresponding to the two endpoints and the target register offset value corresponding to the second binding luminance when the second binding luminance is between the intermediate luminance corresponding to the two endpoints and the second endpoint luminance, it is possible to obtain
The above formula is applicable to the calculation of the offset value of the target register corresponding to the second bound luminance when the second bound luminance is between the first endpoint luminance and the intermediate luminance corresponding to the two endpoints and when the second bound luminance is between the second endpoint luminance.
That is, the preset corresponding relationship of the second bound illumination intensity between the first endpoint illumination intensity, or the middle illumination intensity corresponding to the two endpoints and the second endpoint illumination intensity is that the second bound illumination intensity is between the first endpoint illumination intensity and the second endpoint illumination intensity
Wherein, O k Indicating a register offset value, O mid(i,i+1) Denotes a preset midpoint offset value, L i+1 Representing the first endpoint luminance, L i Indicating a second endpoint brightness, L k Representing the register gain value.
And step 24, determining a gamma register value corresponding to the second binding brightness under the brightness level binding to be calculated according to the register gain value and the target register offset value.
Optionally, the sum of the register gain value and the target register offset value is determined as the gamma register value corresponding to the second binding brightness under the brightness level binding to be calculated.
The embodiment of the present invention further provides a gamma debugging device for a display module, fig. 9 is a schematic structural diagram of the gamma debugging device for a display module provided in the embodiment of the present invention, and with reference to fig. 9, optionally, the gamma debugging device for a display module includes:
the dividing module 410 is configured to divide the display brightness level of the display module into a plurality of dimming intervals, where the plurality of dimming intervals at least include a first data voltage dimming interval and a second data voltage dimming interval, where the second data voltage dimming interval is continuous with the first data voltage dimming interval, and interval endpoints of the second data voltage dimming interval are a first brightness level tie point and a second brightness level tie point respectively, where the first brightness level tie point is a maximum display brightness level of the display module; the power supply voltage corresponding to the second brightness level binding point is greater than the power supply voltage corresponding to the first brightness level binding point, the maximum voltage corresponding to the second brightness level binding point is less than the maximum voltage corresponding to the first brightness level binding point, and the minimum voltage corresponding to the second brightness level binding point is greater than the minimum voltage corresponding to the first brightness level binding point; in the first data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed;
the calculating module 420 is configured to calculate, in the first data voltage dimming interval, gamma register values under other brightness level bindings according to a reference curve corresponding to the second brightness level binding point in the first data voltage dimming interval, where the reference curve is a relationship curve between the gamma register values under the second brightness level binding point in the first data voltage dimming interval and the brightness of each first binding point;
wherein each brightness level binding point corresponds to a set of gamma register values.
According to the gamma debugging device for the display module, the display brightness level of the display module is divided into a plurality of dimming intervals through the dividing module; the dimming control circuit comprises a plurality of dimming intervals, a first data voltage dimming interval, a second data voltage dimming interval, a first brightness level binding point, a second brightness level binding point, a gamma circuit and a second data voltage dimming interval, wherein the plurality of dimming intervals at least comprise the first data voltage dimming interval and the second data voltage dimming interval, the second data voltage dimming interval is continuous with the first data voltage dimming interval, the interval endpoints of the second data voltage dimming interval are respectively a first brightness level binding point and a second brightness level binding point, the power voltage corresponding to the second brightness level binding point is set to be greater than the power voltage corresponding to the first brightness level binding point, the maximum voltage corresponding to the second brightness level binding point is smaller than the maximum voltage of the gamma circuit corresponding to the first brightness level binding point, and the minimum voltage of the gamma circuit corresponding to the second brightness level binding point is greater than the minimum voltage corresponding to the first brightness level binding point; so that the display module can keep lower power consumption. And through setting up in the first data voltage interval of adjusting luminance, the PWM duty cycle, gamma circuit's maximum voltage and minimum voltage, and to the display module assembly in the power supply voltage of emitting device negative pole access fixed, can realize that the calculation module is in the first data voltage interval of adjusting luminance, according to the reference curve that the second brightness level tie corresponds in the first data voltage interval of adjusting luminance calculates the gamma register value under other brightness level ties, and then can make in two intervals of adjusting luminance of first data voltage interval of adjusting luminance and second data voltage interval of adjusting luminance, only need carry out gamma debugging under first brightness level tie and the second brightness level tie can, the gamma register value that other brightness level ties correspond all can be obtained through the calculation, and then be favorable to improving gamma debugging efficiency. Therefore, compared with the prior art, the gamma debugging method provided by the embodiment can simultaneously realize the reduction of the power consumption of the display module and the improvement of the gamma debugging efficiency.
The embodiment of the invention also provides a display module, and the display module can adopt the gamma debugging method of the display module to carry out gamma debugging.
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 (12)
1. A gamma debugging method for a display module is characterized by comprising the following steps:
dividing the display brightness level of the display module into a plurality of dimming intervals, wherein the dimming intervals at least comprise a first data voltage dimming interval and a second data voltage dimming interval, the second data voltage dimming interval is continuous with the first data voltage dimming interval, and the interval end points of the second data voltage dimming interval are respectively a first brightness level tie point and a second brightness level tie point, wherein the first brightness level tie point is the maximum display brightness level of the display module; the power supply voltage corresponding to the second brightness level binding point is greater than the power supply voltage corresponding to the first brightness level binding point, the maximum voltage of the gamma circuit corresponding to the second brightness level binding point is less than the maximum voltage corresponding to the first brightness level binding point, and the minimum voltage of the gamma circuit corresponding to the second brightness level binding point is greater than the minimum voltage corresponding to the first brightness level binding point; in the first data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage connected to the cathode of a light emitting device in the display module are fixed;
in the first data voltage dimming interval, calculating gamma register values under other brightness level binding points according to a reference curve corresponding to second brightness level binding points in the first data voltage dimming interval, wherein the reference curve is a relation curve between the gamma register values under the second brightness level binding points in the first data voltage dimming interval and the brightness of each first binding point;
wherein each of the brightness level bindings corresponds to a set of gamma register values.
2. The gamma debugging method of claim 1, wherein the plurality of dimming intervals further comprises a PWM dimming interval; in the PWM dimming interval, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed;
the gamma debugging method for the display module further comprises the following steps:
and in the PWM dimming interval, determining gamma data under other brightness level bindings according to a group of gamma data under the maximum brightness level binding point and a group of gamma data under the minimum brightness level binding point in the PWM dimming interval, wherein the gamma data comprise PWM duty ratio and gamma register value.
3. The gamma debugging method of claim 2, wherein the plurality of dimming intervals further comprises a hybrid dimming interval and a third data voltage dimming interval,
divide the display brightness level of display module assembly into a plurality of sections of adjusting luminance, include:
dividing the display brightness level of the display module into a second data voltage dimming interval, a first data voltage dimming interval, a mixed dimming interval, a PWM dimming interval and a third data voltage dimming interval from high to low;
and in the third data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage connected to the cathode of a light emitting device in the display module are fixed.
4. The gamma debugging method of claim 2 or 3, wherein said first data voltage dimming interval and said PWM dimming interval comprise at least three brightness level ties.
5. The gamma debugging method of claim 3, wherein,
the hybrid dimming interval includes two brightness level tie points.
6. The gamma adjustment method for display module of claim 5, wherein the third data voltage dimming interval comprises two brightness level ties.
7. The gamma debugging method of claim 3, wherein,
the end points of the mixed dimming interval are respectively a third brightness level binding point and a fourth brightness level binding point, and the third brightness level binding point is adjacent to the fourth brightness level binding point in the plurality of brightness level binding points of the display module, and is greater than the fourth brightness level binding point;
the power supply voltage corresponding to the fourth brightness level binding point is smaller than the power supply voltage corresponding to the third brightness level binding point, the maximum voltage corresponding to the fourth brightness level binding point is smaller than the maximum voltage corresponding to the third brightness level binding point, and the minimum voltage corresponding to the fourth brightness level binding point is larger than the minimum voltage corresponding to the third brightness level binding point.
8. The gamma debugging method of claim 1, wherein during the first data voltage dimming interval, calculating gamma register values under other brightness level bindings from a set of gamma register values under a second brightness level binding point within the first data voltage dimming interval comprises:
acquiring a reference curve;
determining a register gain value corresponding to second binding point brightness on a straight line connecting line according to two end point straight lines of the second binding point brightness corresponding to the first binding point brightness interval belonging to the reference curve under the condition that the brightness level to be calculated is bound in the first data voltage dimming interval;
determining a target register offset value corresponding to the second binding point brightness according to a preset corresponding relationship between the target register offset value corresponding to the second binding point brightness and a preset midpoint offset value corresponding to the middle brightness of the two endpoints, wherein in the preset corresponding relationship, the target register offset value is positively correlated with the preset midpoint offset value, the target register offset value is negatively correlated with an absolute value of a first brightness difference value, and the first brightness difference value is the middle brightness difference value between the second binding point brightness and the two endpoints;
and determining a gamma register value corresponding to the second binding brightness under the brightness level binding to be calculated according to the register gain value and the target register offset value.
9. The gamma debugging method of claim 8, wherein determining the target register offset value corresponding to the second tied-illumination level according to the preset correspondence between the target register offset value corresponding to the second tied-illumination level and the preset midpoint offset value corresponding to the middle illumination level of the two endpoints comprises:
when the second tie point brightness is between the first endpoint brightness and the intermediate brightness corresponding to the two endpoints, determining the preset corresponding relationship according to the similarity between the first endpoint, the corresponding point of the second tie point brightness on the straight line connecting line, the first triangle with the corresponding point of the second tie point brightness on the reference curve as the vertex, and the first endpoint, the middle point of the straight line connecting line, and the second triangle with the corresponding point of the intermediate brightness of the two endpoints on the reference curve as the vertex;
when the second tie point brightness is between the middle brightness and the second end point brightness corresponding to the two end points, determining the preset corresponding relationship according to the similarity between the second end point, the corresponding point of the second tie point brightness on the straight line connecting line, a third triangle with the corresponding point of the second tie point brightness on the reference curve as a vertex, and a fourth triangle with the second end point, the middle point of the straight line connecting line, and the corresponding point of the middle brightness of the two end points on the reference curve as a vertex; wherein the first endpoint is a corresponding point of a first endpoint brightness of the first binding brightness interval on the reference curve, the second endpoint is a corresponding point of a second endpoint brightness of the first binding brightness interval on the reference curve, and the first endpoint brightness is smaller than the second endpoint brightness;
and determining the target register offset value according to the preset corresponding relation and the preset midpoint offset value.
10. The gamma debugging method of claim 9,
the preset corresponding relation is
Wherein, O k Represents the register offset value, O mid Represents the preset midpoint offset value, L i+1 Representing the first endpoint luminance, L i Represents the second endpoint brightness, L k Representing the register gain value.
11. The utility model provides a display module assembly gamma debugging device which characterized in that includes:
the display module comprises a dividing module, a display module and a control module, wherein the dividing module is used for dividing the display brightness level of the display module into a plurality of dimming intervals, the plurality of dimming intervals at least comprise a first data voltage dimming interval and a second data voltage dimming interval, the second data voltage dimming interval is continuous with the first data voltage dimming interval, and the interval endpoints of the second data voltage dimming interval are respectively a first brightness level binding point and a second brightness level binding point, wherein the first brightness level binding point is the maximum display brightness level of the display module; the power supply voltage corresponding to the second brightness level binding point is greater than the power supply voltage corresponding to the first brightness level binding point, the maximum voltage corresponding to the second brightness level binding point is less than the maximum voltage corresponding to the first brightness level binding point, and the minimum voltage corresponding to the second brightness level binding point is greater than the minimum voltage corresponding to the first brightness level binding point; in the first data voltage dimming interval, the PWM duty ratio, the maximum voltage and the minimum voltage of the gamma circuit and the power supply voltage connected to the cathode of the light emitting device in the display module are fixed;
the calculation module is used for calculating gamma register values under other brightness level binding points according to a reference curve corresponding to a second brightness level binding point in the first data voltage dimming interval, wherein the reference curve is a relation curve between the gamma register values under the second brightness level binding point in the first data voltage dimming interval and the brightness of each first binding point;
wherein each said brightness level binding point corresponds to a set of gamma register values.
12. A display module, wherein the display module employs the gamma debugging method of any one of claims 1-10 to perform gamma debugging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010611816.3A CN111754914B (en) | 2020-06-29 | 2020-06-29 | Gamma debugging method and device for display module and display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010611816.3A CN111754914B (en) | 2020-06-29 | 2020-06-29 | Gamma debugging method and device for display module and display module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111754914A CN111754914A (en) | 2020-10-09 |
| CN111754914B true CN111754914B (en) | 2022-09-30 |
Family
ID=72678181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010611816.3A Active CN111754914B (en) | 2020-06-29 | 2020-06-29 | Gamma debugging method and device for display module and display module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111754914B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7590299B2 (en) * | 2004-06-10 | 2009-09-15 | Samsung Electronics Co., Ltd. | Increasing gamma accuracy in quantized systems |
| KR101679360B1 (en) * | 2010-08-05 | 2016-11-25 | 삼성디스플레이 주식회사 | An apparatus and a method for generating gray-scale voltage, and an organic electroluminescent display |
| KR101857813B1 (en) * | 2011-12-15 | 2018-05-15 | 엘지디스플레이 주식회사 | Gamma voltage generation circuit and organic light emitting diode display device including the same |
| CN109036327A (en) * | 2018-10-24 | 2018-12-18 | 惠科股份有限公司 | Gamma value adjusting method, device and the computer readable storage medium of display panel |
| CN110491330B (en) * | 2019-09-26 | 2022-10-14 | 昆山国显光电有限公司 | Gamma adjusting method and device and display device |
| CN110634437B (en) * | 2019-09-26 | 2022-10-11 | 昆山国显光电有限公司 | Gamma curve acquisition method and device for multi-segment display brightness and display equipment |
| CN110738960B (en) * | 2019-11-29 | 2021-02-02 | 上海天马有机发光显示技术有限公司 | Display device and control method and device thereof |
-
2020
- 2020-06-29 CN CN202010611816.3A patent/CN111754914B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111754914A (en) | 2020-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108630148B (en) | Method for compensating brightness difference of display panel and display | |
| CN111754912B (en) | Gamma debugging method and device | |
| CA2674871C (en) | Systems and methods for reducing power consumption in a device through a content adaptive display | |
| CN110634437B (en) | Gamma curve acquisition method and device for multi-segment display brightness and display equipment | |
| CN108962126A (en) | A kind of displaying panel driving method, drive system and the display device comprising it | |
| CN106297731A (en) | Strengthen the method and device of picture contrast, display screen and intelligent terminal | |
| CN111754913B (en) | Gamma calculation method and device and display panel | |
| CN111508414B (en) | Gamma adjusting method and device for display panel | |
| JP7248579B2 (en) | Complementary color method for WOLED display device, WOLED display device | |
| KR20160132247A (en) | Display device and method for driving the same | |
| US20070211179A1 (en) | Colour display device | |
| KR101073006B1 (en) | Display device and method for controling brightness of images in display device | |
| CN110197640B (en) | Display screen brightness adjusting method and device and display screen | |
| CN102034431A (en) | Gamma correction method and device for LED | |
| CN114023235B (en) | Display panel driving method, electronic device, and computer-readable storage medium | |
| CN111754914B (en) | Gamma debugging method and device for display module and display module | |
| US20210241722A1 (en) | Devices and methods for dimming a display screen | |
| CN106373517B (en) | Display and display method | |
| CN108022545A (en) | Display screen light-dimming method, device, storage medium and electronic equipment | |
| JP2018180423A (en) | Led display system and led display device | |
| TW202226188A (en) | Gamma debugging method and gamma debugging device for display panel | |
| CN114464123B (en) | Gamma debugging method and gamma debugging device for display panel | |
| CN114822342A (en) | Gamma debugging method and device for display panel | |
| KR100708823B1 (en) | Apparatus for controling brightness of plasma display panel and method therefor | |
| TWI757078B (en) | Electronic device and brightness adjustment method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |