CN111968580A - Gamma debugging method, gamma debugging device and storage medium - Google Patents

Gamma debugging method, gamma debugging device and storage medium Download PDF

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CN111968580A
CN111968580A CN202010935293.8A CN202010935293A CN111968580A CN 111968580 A CN111968580 A CN 111968580A CN 202010935293 A CN202010935293 A CN 202010935293A CN 111968580 A CN111968580 A CN 111968580A
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reference voltage
gamma
display brightness
current display
voltage
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CN111968580B (en
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张志广
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Chengdu BOE Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

Abstract

The application discloses a gamma debugging method, gamma debugging equipment and a storage medium, wherein the gamma debugging method comprises the steps of determining a first reference voltage and a second reference voltage of the current display brightness according to the first reference voltage and the second reference voltage of each gamma group corresponding to the upper and lower adjacent display brightness of the current display brightness in a multi-section debugging mode if no gamma group corresponding to the current display brightness exists; and debugging the voltage of at least part of gray scale binding points in the range of the first reference voltage and the second reference voltage of the current display brightness to enable the gray scale brightness value corresponding to the gray scale binding points to reach a target gray scale brightness value. According to the first reference voltage and the second reference voltage of each gamma group corresponding to the adjacent display brightness of the current display brightness, the first reference voltage and the second reference voltage of the current display brightness are determined, namely according to the difference of the display brightness, the first reference voltage and the second reference voltage can change along with the brightness, and the gamma debugging precision in low brightness can be improved.

Description

Gamma debugging method, gamma debugging device and storage medium
Technical Field
The present invention relates to the field of display module detection, and in particular, to a gamma debugging method, a gamma debugging device, and a storage medium.
Background
When an AMOLED (Active-Matrix Organic Light Emitting Diode) displays a picture, a Gamma (Gamma)2.2 curve relationship between gray scale and brightness needs to be satisfied.
In order to ensure the display effect under each display brightness, it is generally necessary to perform multi-stage debugging, that is, Gamma debugging (Gamma Tuning) is performed on each of a plurality of display brightnesses, and one Gamma curve is corresponding to each display brightness, which may also be called as a Gamma group (Gamma Band).
Disclosure of Invention
In view of the above-mentioned drawbacks or deficiencies in the prior art, it is desirable to provide a gamma debugging method, a gamma debugging device, and a storage medium, at least for improving the accuracy of gamma debugging at low brightness.
In a first aspect, the present invention provides a gamma debugging method, including the following steps:
in a multi-stage debugging mode, if no gamma group corresponding to the current display brightness exists, determining a first reference voltage and a second reference voltage of the current display brightness according to a first reference voltage and a second reference voltage of each gamma group corresponding to the display brightness adjacent to the current display brightness up and down;
and debugging the voltage of at least part of gray scale binding points in the range of the first reference voltage and the second reference voltage of the current display brightness to enable the gray scale brightness value corresponding to the gray scale binding points to reach a target gray scale brightness value.
And as an implementation mode, debugging the voltage of partial gray scale binding points, and determining the binding voltage of the gray scale binding points of which the current display brightness is not debugged according to the binding voltages of the gray scale binding points of each gamma group corresponding to the upper and lower adjacent display brightness of the current display brightness.
As an implementation manner, the determining the first reference voltage and the second reference voltage of the current display brightness according to the first reference voltage and the second reference voltage of each gamma group corresponding to the display brightness adjacent to the current display brightness includes:
the first reference voltage and the second reference voltage of the current display luminance are determined according to the following relation,
Figure BDA0002671712180000021
Figure BDA0002671712180000022
VGSP is a first reference voltage of current display brightness, VGMP is a second reference voltage of current display brightness, DBV is current display brightness, and DBV isn-1For display luminances adjacent below the current display luminance, DBVnFor display luminances adjacent above the current display luminance, VGSPn-1Is a DBVn-1Of the first reference voltage, VGMPn-1Is a DBVn-1Of the second reference voltage, VGSPnIs a DBVnOf the first reference voltage, VGMPnIs a DBVnN is a natural number and n is 2 or more.
As an implementation manner, the binding voltage of the gray scale binding point of which the current display brightness is not debugged is determined according to the following relational expression,
Figure BDA0002671712180000023
Figure BDA0002671712180000024
Figure BDA0002671712180000025
wherein the content of the first and second substances,
Figure BDA0002671712180000026
for the mth binding voltage of the (n-1) th gamma group,
Figure BDA0002671712180000027
for the mth binding voltage, V, of the nth gamma groupmFor the m-th un-debugged gray scale of the current display brightnessThe binding voltage of the binding is set to be,
Figure BDA0002671712180000028
a register value of the mth binding voltage for the (n-1) th gamma group,
Figure BDA0002671712180000029
a register value of an mth binding voltage for an nth gamma group.
As an implementation manner, the register value of each binding point of the gamma group of the current display luminance is determined according to the first reference voltage, the second reference voltage and the voltage of each binding point of the current display luminance.
As an implementation, the register values of each binding point of the gamma group of the current display luminance are determined according to the following relation:
Figure BDA0002671712180000031
where round () is the rounding function, regsiIs the register value of the ith binding point, bn is the number of bytes of the divider resistor string in the gamma circuit, i is a natural number, viIs the voltage value of the ith binding point.
As an implementation, the number and/or location of the debugged bindings in each of the gamma groups may be adjustable.
As an implementation manner, the number of tie points for debugging in the gamma group corresponding to the low display brightness is greater than the number of tie points for debugging in the gamma group corresponding to the high display brightness.
In a second aspect, a gamma debugging device is provided, which includes a memory and a processor, wherein the memory stores a program, and the program realizes the above gamma debugging method when being read and executed by the processor.
In a third aspect, a storage medium is provided, on which a computer program executable on a processor is stored, the computer program implementing the above gamma debugging method when executed by the processor.
According to the technical scheme provided by the embodiment of the application, the first reference voltage and the second reference voltage of the current display brightness are determined according to the first reference voltage and the second reference voltage of each gamma group corresponding to the upper and lower adjacent display brightness of the current display brightness, namely the first reference voltage and the second reference voltage can change along with the brightness according to the difference of the display brightness, so that the gamma debugging precision in low brightness can be improved.
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Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a flowchart illustrating gamma debugging according to an embodiment of the present invention;
FIG. 2 is a diagram of a gamma debugging apparatus according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the present embodiment provides a gamma debugging method, including the following steps:
s1: in a multi-stage debugging mode, if no gamma group corresponding to the current display brightness exists, determining a first reference voltage and a second reference voltage of the current display brightness according to a first reference voltage and a second reference voltage of each gamma group corresponding to the display brightness adjacent to the current display brightness up and down;
the multi-stage debug mode is used to perform gamma debug at different display brightness. As will be understood by those skilled in the art, for the display Panel (Panel), the display brightness of the display Panel can be adjusted according to the brightness of the use environment, for example, the display brightness can be adjustedTo be arbitrarily debugged from 0-100. If the number of bytes of the voltage dividing resistor string of the gamma circuit is 10 bits, the voltage will be 2 for any display brightness10(1024) And debugging the gray scale binding points by adopting the 1024 parts of voltage. In order to meet the requirement of industrial production and ensure certain production efficiency, generally, only a plurality of display luminances are debugged, for example, gamma debugging is performed under the display luminances of 10, 20, 30, 40, 50, 60, 70, 80, etc. One gamma group for each display brightness.
The adjacent display brightness of the current display brightness is that, of the brightness corresponding to the existing gamma group, two display brightness which are closest to the current display brightness are included, one of the two display brightness is smaller than the current display brightness, and the other display brightness is larger than the current display brightness.
If there is no gamma group corresponding to the current display brightness, for example, the current display brightness is 56, and there is no gamma group corresponding to the display brightness of 56 in the gamma groups, the first reference voltage and the second reference voltage of the current display brightness are determined according to the first reference voltage and the second reference voltage of the gamma group corresponding to the display brightness of 50 and the display brightness of 60. Generally, the first reference voltage is a peak voltage VGMP of the gamma circuit, and the second reference voltage is a valley voltage VGSP of the gamma circuit.
S2: and debugging (Tuning) the voltage of at least part of gray scale binding points in the first reference voltage range and the second reference voltage range of the current display brightness, so that the gray scale brightness value corresponding to the gray scale binding points reaches a target gray scale brightness value.
For gray scale binding points for carrying out gamma debugging, the control voltage is adjusted within the range of a first reference voltage and a second reference voltage of the current display brightness, so that the gray scale brightness value corresponding to the gray scale binding points reaches a target gray scale brightness value, wherein the target gray scale brightness value is the gray scale brightness value corresponding to the gray scale binding points in a target gamma curve.
The first reference voltage, the second reference voltage range and the control voltage obtained by debugging the binding point of each gray scale of the current display brightness can be stored in the gamma register.
According to the technical scheme provided by the embodiment of the application, the first reference voltage and the second reference voltage of the current display brightness are determined according to the first reference voltage and the second reference voltage of each gamma group corresponding to the upper and lower adjacent display brightness of the current display brightness, namely the first reference voltage and the second reference voltage can change along with the brightness according to the difference of the display brightness, so that the gamma debugging precision in low brightness can be improved, and the optical performance is improved. In addition, only partial gray scale binding points can be debugged, so that the debugging time is saved, and the production efficiency is improved.
Compared with the prior art that the first reference voltage and the second reference voltage are fixed and the first reference voltage and the second reference voltage are required to be the maximum voltage required by the gamma debugging of each brightness in order to meet the gamma debugging requirement of each brightness, the first reference voltage and the second reference voltage are changed along with the brightness, the first reference voltage and the second reference voltage with different sizes are adopted under different brightnesses, namely the maximum voltage is not required to be adopted under each brightness, and partial power consumption of a Source (Source) can be saved against the reduction of the adopted voltage.
As an implementation manner, in order to improve the debugging efficiency and reduce the Time (Tack Time) consumed by debugging, only the voltages of some gray scale bindings may be debugged, and the voltages of the remaining gray scale bindings may be obtained in a non-linear difference manner, that is, the voltages of some gray scale bindings are debugged, and the binding voltages of the gray scale bindings of which the current display brightness is not debugged are determined according to the binding voltages of the gamma group gray scale bindings corresponding to the upper and lower adjacent display brightness of the current display brightness.
As an implementation manner, the determining the first reference voltage and the second reference voltage of the current display brightness according to the first reference voltage and the second reference voltage of each gamma group corresponding to the display brightness adjacent to the current display brightness includes:
the first reference voltage and the second reference voltage of the current display luminance are determined according to the following relation,
Figure BDA0002671712180000061
Figure BDA0002671712180000062
VGSP is a first reference voltage of current display brightness, VGMP is a second reference voltage of current display brightness, DBV is current display brightness, and DBV isn-1For display luminances adjacent below the current display luminance, DBVnFor display luminances adjacent above the current display luminance, VGSPn-1Is a DBVn-1Of the first reference voltage, VGMPn-1Is a DBVn-1Of the second reference voltage, VGSPnIs a DBVnOf the first reference voltage, VGMPnIs a DBVnN is a natural number and n is 2 or more.
As an implementation manner, the tie voltage of the gray scale tie point of which the current display brightness is not debugged is determined according to the following relational expression, that is, the non-linear difference value is performed according to the following relational expression, so as to obtain the tie voltage of the gray scale tie point of which the current display brightness is not debugged.
Figure BDA0002671712180000063
Figure BDA0002671712180000064
Figure BDA0002671712180000065
Wherein the content of the first and second substances,
Figure BDA0002671712180000066
for the mth binding voltage of the (n-1) th gamma group,
Figure BDA0002671712180000067
for the mth binding voltage, V, of the nth gamma groupmThe binding voltage of the mth untuned gray level binding of the current display brightness,
Figure BDA0002671712180000068
a register value of the mth binding voltage for the (n-1) th gamma group,
Figure BDA0002671712180000069
a register value of an mth binding voltage for an nth gamma group.
As an implementation manner, the register value of each binding point of the gamma group of the current display luminance is determined according to the first reference voltage, the second reference voltage and the voltage of each binding point of the current display luminance.
As an implementation manner, the scheme is suitable for Digital Gamma (Digital Gamma) debugging, and the register value of each binding point of the Gamma group of the current display brightness is determined according to the following relation:
Figure BDA00026717121800000610
where round () is the rounding function, regsiIs the register value of the ith binding point, bn is the number of bytes of the divider resistor string in the gamma circuit, i is a natural number, viIs the voltage value of the ith binding point.
As an implementation, the number and/or location of the debugged bindings in each of the gamma groups may be adjustable. It should be noted that, in different gamma groups, the number of the bindings to be debugged may be different, and the locations of the bindings may also be different. As shown in the following table, the display brightness DBV0 and the display brightness DBV1 have different numbers of tie points to be debugged, and the debug tie points have different positions, such as the tie point Tap for gray level in the display brightness DBV03Debugging is performed to tie up the gray level Tap in the display brightness DBV13And calculating the difference value to obtain the voltage of the gray scale tie point.
As an implementation manner, in order to improve the optical performance of the display module and reduce the debugging time, the number of tie points for debugging in the gamma group corresponding to the low display brightness is greater than the number of tie points for debugging in the gamma group corresponding to the high display brightness. Generally, in the gamma group with low brightness, the middle and low gray levels can increase the number of debugged binding points, for example, but not limited to, more binding points are debugged at gray levels 0-60, and less binding points are debugged at gray levels 61-255.
Figure BDA0002671712180000071
As shown in the above table, the DBV0 to DBVn display brightness gradually increases, and the gray level binding point Tap is at the DBV01To TapmIn the middle, more gray scale binding points are debugged (the table with the same sign in the table indicates that the corresponding gray scale binding points are debugged, and the table without the same sign indicates that the voltage of the corresponding gray scale binding points is determined by difference calculation), and the debugging density of the gray scale binding points can also be considered to be high. Along with the increase of the actual brightness, the debugging gray scale binding points are reduced, and the debugging density of the gray scale binding points is low, and correspondingly, the gray scale binding points calculated by adopting the difference value are increased, so that the debugging time can be reduced.
Based on the same inventive concept, as shown in fig. 2, an embodiment of the present invention provides a gamma debugging device 10, which includes a memory 12 and a processor 11, where the memory 12 stores a program, and the program, when read and executed by the processor 11, implements the above gamma debugging method.
Based on the same inventive concept, embodiments of the present invention provide a medium on which a computer program executable on a processor is stored, the computer program implementing the above gamma debugging method when executed by the processor.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. A gamma debugging method is characterized by comprising the following steps:
in a multi-stage debugging mode, if no gamma group corresponding to the current display brightness exists, determining a first reference voltage and a second reference voltage of the current display brightness according to a first reference voltage and a second reference voltage of each gamma group corresponding to the display brightness adjacent to the current display brightness up and down;
and debugging the voltage of at least part of gray scale binding points in the range of the first reference voltage and the second reference voltage of the current display brightness to enable the gray scale brightness value corresponding to the gray scale binding points to reach a target gray scale brightness value.
2. The gamma adjustment method according to claim 1, wherein the voltage of some gray scale tie points is adjusted, and the tie point voltage of the gray scale tie point of which the current display brightness is not adjusted is determined according to the tie point voltage of each gamma group gray scale tie point corresponding to the display brightness adjacent to the current display brightness.
3. The gamma debugging method according to claim 1, wherein the determining the first reference voltage and the second reference voltage of the current display luminance according to the first reference voltage and the second reference voltage of each gamma group corresponding to the display luminance adjacent to the current display luminance includes:
the first reference voltage and the second reference voltage of the current display luminance are determined according to the following relation,
Figure FDA0002671712170000011
Figure FDA0002671712170000012
VGSP is a first reference voltage of current display brightness, VGMP is a second reference voltage of current display brightness, DBV is current display brightness, and DBV isn-1For being adjacent below the current display brightnessDisplay brightness, DBVnFor display luminances adjacent above the current display luminance, VGSPn-1Is a DBVn-1Of the first reference voltage, VGMPn-1Is a DBVn-1Of the second reference voltage, VGSPnIs a DBVnOf the first reference voltage, VGMPnIs a DBVnN is a natural number and n is 2 or more.
4. The gamma debugging method of claim 2,
determining the binding voltage of the gray scale binding point of which the current display brightness is not debugged according to the following relational expression,
Figure FDA0002671712170000021
Figure FDA0002671712170000022
Figure FDA0002671712170000023
wherein the content of the first and second substances,
Figure FDA0002671712170000024
for the mth binding voltage of the (n-1) th gamma group,
Figure FDA0002671712170000025
for the mth binding voltage, V, of the nth gamma groupmThe binding voltage of the mth untuned gray level binding of the current display brightness,
Figure FDA0002671712170000026
a register value of the mth binding voltage for the (n-1) th gamma group,
Figure FDA0002671712170000027
a register value of an mth binding voltage for an nth gamma group.
5. The gamma adjustment method according to claim 4, wherein the register value of each binding point of the gamma group of the current display brightness is determined according to the first reference voltage, the second reference voltage and the voltage of each binding point of the current display brightness.
6. The gamma debugging method according to claim 5, wherein the register values of the respective bindings of the gamma group for the current display brightness are determined according to the following relation:
Figure FDA0002671712170000028
where round () is the rounding function, regsiIs the register value of the ith binding point, bn is the number of bytes of the divider resistor string in the gamma circuit, i is a natural number, viIs the voltage value of the ith binding point.
7. A gamma debugging method according to any one of claims 1 to 6, wherein the number and/or location of the bindings in each gamma group to be debugged is adjustable.
8. The gamma adjustment method according to claim 7, wherein the number of the binding points for adjustment in the gamma group corresponding to the low display brightness is larger than the number of the binding points for adjustment in the gamma group corresponding to the high display brightness.
9. A gamma debugging device comprising a memory and a processor, the memory storing a program which, when read and executed by the processor, implements the gamma debugging method according to claims 1-8.
10. A storage medium having stored thereon a computer program executable on a processor, the computer program, when executed by the processor, implementing the gamma debugging method of any one of claims 1-8.
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