CN115588406A

CN115588406A - Gamma debugging method and device of display module and display method of display module

Info

Publication number: CN115588406A
Application number: CN202211190292.0A
Authority: CN
Inventors: 鉏文权; 李永岗; 潘卫卫; 何浏; 张亚飞; 朱修剑
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd; Hefei Visionox Technology Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd; Hefei Visionox Technology Co Ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-01-10

Abstract

The application discloses display module assembly gamma debugging method, device and display module assembly's display method, wherein, display module assembly's gamma debugging method includes: acquiring gamma debugging parameters of reference gray level binding points, wherein the gamma debugging parameters comprise gamma register values or gamma voltages; and multiplying the gamma debugging parameters of the reference gray level binding points by the debugging coefficients to obtain the gamma debugging parameters of the zero gray level binding points. The method and the device can improve the smear problem generated when the gamma debugging is carried out in the related art.

Description

Gamma debugging method and device for display module and display method for display module

Technical Field

The application belongs to the technical field of display, and particularly relates to a gamma debugging method and device for a display module and a display method for the display module.

Background

With the development of various electronic devices, display modules for displaying and/or interacting information of electronic devices are also being updated. Among them, the Organic Light-Emitting Diode (OLED) display module is becoming the mainstream, but the OLED display module generally has a smear phenomenon at present.

Disclosure of Invention

The embodiment of the application provides a gamma debugging method and device for a display module and a display method for the display module, which can solve the problem of smear caused by gamma debugging in the related art.

On one hand, the embodiment of the application provides a gamma debugging method of a display module, and the method comprises the following steps:

acquiring gamma debugging parameters of reference gray scale binding points, wherein the gamma debugging parameters comprise gamma register values or gamma voltages;

and multiplying the gamma debugging parameters of the reference gray level binding points by the debugging coefficients to obtain the gamma debugging parameters of the zero gray level binding points.

Optionally, the display module assembly includes a plurality of brightness levels, multiplies the gamma debugging parameter of reference gray scale binding point with the debugging coefficient, obtains the gamma debugging parameter of zero gray scale binding point, includes:

and multiplying the gamma debugging parameters of the reference gray scale binding points at each brightness level by the debugging coefficients at the corresponding brightness levels to obtain the gamma debugging parameters of the zero gray scale binding points at each brightness level.

Optionally, the gamma debugging parameters of the reference gray scale tie points include a first gamma debugging parameter corresponding to a red sub-pixel of the display module, a second gamma debugging parameter corresponding to a green sub-pixel of the display module, and a third gamma debugging parameter corresponding to a blue sub-pixel of the display module;

multiplying the gamma debugging parameters of the reference gray scale binding points under each brightness level by the debugging coefficients under the corresponding brightness levels to obtain the gamma debugging parameters of the zero gray scale binding points under each brightness level, and the method comprises the following steps:

multiplying a first gamma debugging parameter of a reference gray scale binding point of the red sub-pixel at each brightness level by a debugging coefficient of the red sub-pixel at the corresponding brightness level to obtain a gamma debugging parameter when the red sub-pixel at each brightness level is at a zero gray scale binding point;

multiplying a second gamma debugging parameter of the reference gray scale binding point of the green sub-pixel at each brightness level by a debugging coefficient of the green sub-pixel at the corresponding brightness level to obtain a gamma debugging parameter when the green sub-pixel at each brightness level is at zero gray scale binding point;

and multiplying the third gamma debugging parameter of the reference gray scale binding point of the blue sub-pixel at each brightness level by the debugging coefficient of the blue sub-pixel at the corresponding brightness level to obtain the gamma debugging parameter when the blue sub-pixel at each brightness level is at the zero gray scale binding point.

Optionally, the plurality of brightness levels include a first brightness level and a second brightness level, and the first brightness level is greater than the second brightness level;

the debugging coefficient at the first brightness level is greater than the debugging coefficient at the second brightness level.

Optionally, the obtaining of the gamma debugging parameter of the reference gray level tie point includes:

determining expected brightness ranges corresponding to a plurality of gray scale binding points under each brightness level, wherein the gray scale binding points comprise zero gray scale binding points and other gray scale binding points except the zero gray scale binding points;

adjusting the gamma debugging parameters of other gray scale binding points under each brightness level to record the gamma debugging parameters when the display brightness of the other gray scale binding points is in a corresponding expected brightness range; other gray level bindings include reference gray level bindings.

Optionally, determining the expected luminance ranges corresponding to the plurality of gray scale binding points under each luminance level respectively includes:

determining a plurality of brightness levels, wherein each brightness level corresponds to a plurality of gray scale binding points;

and calculating expected brightness ranges corresponding to the gray scale binding points under each brightness level according to the gamma parameters corresponding to the brightness levels.

Optionally, the reference gray level tie is the next gray level tie relative to the zero gray level tie.

Optionally, after obtaining the gamma debugging parameter of the zero gray level tie point, the method further includes:

enabling the display module to display a zero gray scale picture based on a gamma debugging parameter of the zero gray scale binding point;

switching the display module from a zero gray scale picture to a high gray scale picture;

if the smear degree of the display module when the display module is switched from a zero-gray-scale picture to a high-gray-scale picture does not meet the preset requirement, adjusting the debugging coefficient, and returning to execute the operation: multiplying the gamma debugging parameters of the reference gray level binding points by the debugging coefficients to obtain the gamma debugging parameters of the zero gray level binding points;

if the smear degree of the display module when the display module is switched from the zero gray scale picture to the high gray scale picture meets the preset requirement, the gamma debugging parameter of the zero gray scale binding point is burnt into the storage module of the display module.

Optionally, if the smear degree of the display module when the display module is switched from the zero-gray-scale picture to the high-gray-scale picture meets the preset requirement, multiplying the current debugging coefficient of the display module by the gamma debugging parameters of the reference gray-scale binding points of other display modules to obtain the gamma debugging parameters of the zero-gray-scale binding points of other display modules, and burning the gamma debugging parameters of the zero-gray-scale binding points of other display modules into the storage modules of other display modules; the display module is different from the gamma debugging parameters of the zero gray scale binding points of at least part of other display modules.

On the other hand, this application embodiment provides a gamma debugging device of display module assembly, and the device includes:

the device comprises an acquisition module, a comparison module and a comparison module, wherein the acquisition module is used for acquiring gamma debugging parameters of reference gray scale binding points, and the gamma debugging parameters comprise gamma register values or gamma voltages;

and the operation module is used for multiplying the gamma debugging parameters of the reference gray level binding points by the debugging coefficient to obtain the gamma debugging parameters of the zero gray level binding points.

In another aspect, the present disclosure provides a display method for a display module, the display module includes a plurality of brightness levels,

the plurality of brightness levels includes a first brightness level and a second brightness level, the first brightness level being greater than the second brightness level;

the ratio of the gamma debugging parameter of the zero gray scale binding point under the first brightness level to the gamma debugging parameter of the reference gray scale binding point is greater than the ratio of the gamma debugging parameter of the zero gray scale binding point under the second brightness level to the gamma debugging parameter of the reference gray scale binding point, wherein the gamma debugging parameter comprises a gamma register value or a gamma voltage.

In another aspect, an embodiment of the present application provides a display device, including:

a processor and a memory storing computer program instructions;

and when the processor executes the computer program instructions, the gamma debugging method of the display module or the display method of the display module in the aspect is realized.

In another aspect, an embodiment of the present application provides a computer-readable storage medium, where computer program instructions are stored on the computer-readable storage medium, and when the computer program instructions are executed by a processor, the steps of the gamma debugging method for a display module or the display method for a display module in the foregoing aspect are implemented.

In another aspect, an embodiment of the present application provides a computer program product, where the computer program product includes a computer program, and when the computer program is executed by a processor, the gamma debugging method of the display module or the display method of the display module in the foregoing aspect is implemented.

The gamma debugging method and device for the display module and the display method for the display module can acquire gamma debugging parameters of reference gray scale binding points, wherein the gamma debugging parameters comprise gamma register values or gamma voltages; and further multiplying the gamma debugging parameters of the reference gray level binding points by the debugging coefficients to obtain the gamma debugging parameters of the zero gray level binding points. The gamma debugging parameter of the zero gray scale binding point is a result of multiplying the gamma debugging parameter of the reference gray scale binding point and the debugging coefficient, therefore, the gamma voltage of the zero gray scale binding point is dynamically determined according to the debugging coefficient and the gamma voltage of the reference gray scale binding point, or the gamma register value of the zero gray scale binding point is dynamically determined according to the debugging coefficient and the gamma register value of the reference gray scale binding point, the accurate debugging of the zero gray scale binding point can be realized, compared with the scheme that VL0 is assigned to be fixed VGMP voltage, the problem of dynamic smear caused by the related technology can be improved, the method is applicable to all display modules, the applicability is strong, and the gamma debugging time is effectively shortened.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view illustrating an optional process of a gamma debugging method of a display module according to an embodiment of the present disclosure;

fig. 2 is a schematic view illustrating an optional detailed flow of acquiring gamma debugging parameters of reference gray level tie points in a gamma debugging method for a display module according to an embodiment of the present disclosure;

FIG. 3 is a schematic view illustrating an alternative process of a gamma debugging method for a display module according to another embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a gamma adjustment apparatus of a display module according to another embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a display device according to still another embodiment of the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of, and not restrictive on, the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

In order to make a Display panel, such as an OLED (Organic Light-Emitting Diode) Display panel, black can be written in the zero gray level at each Display Brightness level (DBV), the VGMP voltage (the maximum gray level voltage corresponding to the Display panel in the darkest state) is generally directly assigned to the gamma voltage at the zero gray level tie point during the gamma voltage adjustment.

In the process of switching the display panel from the zero-gray-scale picture to the 255-gray-scale picture, because the anode of the OLED changes between the reset signal voltage Vref and the VL0 in the zero-gray-scale picture, and the VL0 is assigned as the VGMP voltage, the voltage is higher, so that the charging rate in the first frame time is insufficient, the light-emitting brightness of the first frame image is low, and finally, a dynamic smear phenomenon appears when the first frame image is displayed on the display panel.

In the related art, there is a scheme of assigning a gamma voltage of a zero gray level binding point by increasing a compensation value. However, this scheme is mainly based on power consumption consideration, and the reference voltage values referred to by different display modules when increasing the compensation values are different, so the compensation values of the related schemes for each display module are also inconsistent, and the compensation values of each display module need to be debugged, thereby causing the problems of long gamma debugging time and poor applicability.

In order to solve the above technical problems, embodiments of the present application provide a gamma debugging method and apparatus for a display module, and a display method for a display module.

Fig. 1 is a schematic flowchart illustrating a gamma debugging method for a display module according to an embodiment of the present disclosure. As shown in fig. 1, the gamma debugging method of the display module may include the following steps:

s110, acquiring gamma debugging parameters of reference gray level binding points;

and S120, multiplying the gamma debugging parameters of the reference gray level binding points by the debugging coefficients to obtain the gamma debugging parameters of the zero gray level binding points.

Wherein, above-mentioned gamma debugging parameter can be used for carrying on the parameter that the display module assembly gamma debugs. The gamma debugging parameters include a gamma register value or a gamma voltage. In some examples, the gamma debugging parameter may be a gamma voltage (e.g., may be a driving voltage for driving the sub-pixel to emit light), or may be a gamma register value corresponding to the driving voltage (e.g., may be converted into the driving voltage through a digital-to-analog converter, etc., and then the sub-pixel is driven to emit light). The gamma register value and the gamma voltage of each gray scale binding point have a known corresponding relation. The gamma debugging parameter can be a gamma register value, and the gamma register value of the reference gray level binding point is multiplied by the debugging coefficient to obtain the gamma register value of the zero gray level binding point. The gamma debugging parameter can be gamma voltage, and the gamma voltage of the reference gray level binding point is multiplied by the debugging coefficient to obtain the gamma voltage of the zero gray level binding point.

According to the method and the device, gamma debugging parameters of reference gray scale binding points can be obtained, wherein the gamma debugging parameters comprise gamma register values or gamma voltages; and further multiplying the gamma debugging parameters of the reference gray level binding points by the debugging coefficients to obtain the gamma debugging parameters of the zero gray level binding points. The gamma debugging parameter of the zero gray scale binding point is a result of multiplying the gamma debugging parameter of the reference gray scale binding point and the debugging coefficient, therefore, the gamma voltage of the zero gray scale binding point is dynamically determined according to the debugging coefficient and the gamma voltage of the reference gray scale binding point, or the gamma register value of the zero gray scale binding point is dynamically determined according to the debugging coefficient and the gamma register value of the reference gray scale binding point, compared with the scheme that VL0 is assigned to be fixed VGMP voltage, accurate debugging of the zero gray scale binding point can be realized, the problem of dynamic smear caused by the related technology is improved, the method is applicable to all display modules, the applicability is strong, and the gamma debugging time is effectively shortened.

The gamma voltages referred to in the present application are all the magnitude of voltage, that is, the absolute value of the actual voltage. During normal debugging, the gamma voltage can be presented in the form of negative voltage, and those skilled in the art can implement gamma debugging under negative voltage according to the numerical value of the scheme.

In some optional examples, in S110, after obtaining the gamma debugging parameters of other gray scale bindings except for the zero gray scale binding at each brightness level through gamma debugging, a reference gray scale binding may be selected from the other gray scale bindings, and the gamma debugging parameters of the reference gray scale binding at each brightness level may be obtained.

Alternatively, any one of the gray level bindings may be selected from the other plurality of gray level bindings as the reference gray level binding.

For example, the reference gray level binding may be a gray level binding adjacent to the zero gray level binding, that is, a next gray level binding with respect to the zero gray level binding, and the gray level value of the reference gray level binding may be 1, 2 or 3, for example, or may be other values.

It should be noted that the gray scale binding points have corresponding RGB registers, and register values in the RGB registers can be called when the display module realizes driving display, so that the data writing end of the display module writes gamma voltages of corresponding magnitudes into the register values. Based on this, when the gamma voltage of the reference gray scale binding point is actually debugged and obtained, the register value corresponding to the gamma voltage of the reference gray scale binding point can be recorded.

Alternatively, referring to fig. 2, the above process of acquiring the gamma debugging parameters of the reference gray level tie point through gamma debugging may include the following steps S210 to S230:

s210, determining expected brightness ranges corresponding to a plurality of gray scale binding points under each brightness level, wherein the plurality of gray scale binding points can comprise zero gray scale binding points and other gray scale binding points except the zero gray scale binding points.

S220, adjusting the gamma debugging parameters of other gray scale binding points at each brightness level to record the gamma debugging parameters when the display brightness of the other gray scale binding points is in a corresponding expected brightness range, wherein the other gray scale binding points comprise reference gray scale binding points.

In this example, a process of obtaining gamma debugging parameters of reference gray level bindings at each brightness level is given, and parameter support is given for debugging the gamma debugging parameters of subsequent zero gray level bindings.

In this example, a plurality of brightness levels (bands) may be first determined, each brightness level in turn corresponding to a plurality of gray level bindings. The brightness level may be determined in the range of brightness 0DBV to 4095 DBV. For a plurality of gray scale binding points corresponding to each brightness level, the value range can be from zero gray scale to 255 gray scale, and for each brightness level, part of gray scale can be selected as gray scale binding points.

Illustratively, 10 brightness levels may be selected from the brightnesses 0DBV to 4095DBV, each of which may in turn correspond to 15 gray level ties selected from the gray levels of zero to 255. Illustratively, the selected 10 Brightness levels may correspond to HBM (High Brightness Mode) and 9 Nor modes (Normal Mode), and the 9 Nor modes may be sequentially named Nor1 to Nor9.

For all display modules participating in gamma debugging, the plurality of gray scale binding points corresponding to each brightness level have the corresponding expected brightness range (brightness spec) thereof, and the expected brightness range comprises all expected brightness values of the gray scale binding points under the brightness level.

Illustratively, the expected luminance range for an L15 gray level binding at a 2DBV luminance level is 0.005nit to 0.01nit, and all values between 0.005nit to 0.01nit are all expected luminance values.

After determining the plurality of luminance levels and the plurality of gray level bindings, obtaining therefrom an expected luminance range for the gray level binding at each luminance level may include: and calculating expected brightness ranges respectively corresponding to the gray scale binding points under each brightness level according to the gamma parameters corresponding to the brightness levels.

It should be noted that the display brightness at 255 gray levels at each brightness level is different, so that the upper and lower expected brightness limits that can be reached by each gray level binding point at each brightness level can be calculated according to the gamma parameter corresponding to the brightness level and the corresponding gamma curve formula, thereby forming the expected brightness range.

For example, the expected brightness range can be formed by increasing or decreasing 0.2 on the basis of gamma curve gamma2.2 (corresponding to gamma parameter 2.2), i.e. using gamma2.0 to calculate the upper expected brightness limit of each gray scale binding point of each brightness level, using gamma2.4 to calculate the lower expected brightness limit of each gray scale binding point of each brightness level, the lower expected brightness limit being the left end point value of the interval, and the upper expected brightness limit being the right end point value of the interval.

In the above example, when the plurality of gray scale bindings corresponding to each brightness level are obtained, and the expected brightness ranges corresponding to the plurality of gray scale bindings respectively at each brightness level are obtained, the gamma debugging parameters of other gray scale bindings at each brightness level may be adjusted, so that at the same brightness level, as the gray scale value of the gray scale binding point increases, the gamma debugging parameters gradually decrease or increase, and the display brightness of each gray scale binding point can be in the corresponding expected brightness range.

For example, a preset voltage value (for example, a VGMP voltage) may be used as an initial gamma voltage at each brightness level, and based on the initial gamma voltage, the gamma debugging parameters (for example, the gamma voltages) of other gray scale bindings at each brightness level may be adjusted.

It should be further noted that, in the process of implementing gamma debugging of other gray scale tie points by adjusting the gamma debugging parameters, the display brightness of each of the other gray scale tie points at each brightness level needs to reach an expected brightness range corresponding to the other gray scale tie points, at this time, the gamma debugging parameters reaching the expected brightness range may be recorded (for example, a minimum gamma voltage value reaching the expected brightness is recorded or a minimum register value reaching the expected brightness range is recorded), and at this time, the driving voltage in the pixel circuit is the finally-debugged gamma voltage of the gray scale tie point.

It can be understood that the other gray level bindings include reference gray level bindings, and therefore, when performing gamma debugging of the reference gray level bindings, the recorded gamma debugging parameters are the gamma debugging parameters of the reference gray level bindings.

In some examples, after the gamma debugging parameters corresponding to all other gray scale binding points are recorded, the gamma debugging parameters corresponding to the reference gray scale binding points at each brightness level are read. Illustratively, the minimum gamma debug parameter may be obtained when the display brightness of the reference gray level binding at each brightness level is in the corresponding expected brightness range.

It should be further noted that, in the embodiment of the present application, the gamma debugging parameters of other gray scale bindings at each brightness level are adjusted, so that when the display brightness of the other gray scale bindings reaches the corresponding expected brightness range, the display colors of the other gray scale bindings also need to conform to the preset color coordinate parameters.

In the example, gamma debugging of other gray level bindings is realized, and a detailed acquisition process for adjusting gamma debugging parameters of the reference gray level bindings is also provided.

In some examples, when S120 is executed, a debugging coefficient may be obtained, which can embody a relative relationship between a reference gray level binding and a zero gray level binding as a basis. The debugging coefficient can be obtained by debugging the display effect of a plurality of display modules in advance.

Exemplarily, the gamma debugging parameter corresponding to the reference gray level binding point is a _1, and the debugging coefficient is K, then the gamma debugging parameter corresponding to the zero gray level binding point a _0= K × a _1.

It can be understood that the relative value can be adjusted by multiplying the gamma debugging parameter corresponding to the reference gray scale binding point by the debugging coefficient, so that the brightness change degrees of gray scale pictures with different brightness levels are consistent when the gray scale pictures are switched, and the debugging coefficient can be suitable for different display modules. Compare and increase the gamma voltage debugging scheme that the compensation value carries out zero gray scale tie point, can be applicable to all display module assemblies, the suitability is strong, helps effectively to shorten gamma debugging time.

In some optional examples, different debugging coefficients may be set for different brightness levels, the debugging coefficients may be appropriately reduced for certain gray-scale brightness levels that require higher black-state brightness, and the debugging coefficients may be appropriately increased for a more obvious smear effect of the display module at certain brightness levels.

Illustratively, the brightness levels may include a first brightness level and a second brightness level, where the first brightness level is greater than the second brightness level, and when the debugging coefficient is correspondingly set, the debugging coefficient at the first brightness level may be greater than the debugging coefficient at the second brightness level, so that the black state brightness in a normal use scene can be ensured while the smear problem is improved.

It should be noted that when the brightness level is relatively high, the smear effect may be more obvious, and by increasing the setting of the debugging coefficient, the larger the adjustment of the gamma debugging parameter of the zero gray level tie point is, so as to ensure that the smear can be more obviously improved. Conversely, when the requirement on the black state brightness is higher, the smear expression is relatively weaker, the debugging coefficient can be properly reduced, and the black state brightness in a normal use scene is ensured.

In some optional examples, in S120, the gamma debugging parameter of the reference gray level binding point at each brightness level may be multiplied by the debugging coefficient at the corresponding brightness level to obtain the gamma debugging parameter of the zero gray level binding point at each brightness level. Therefore, accurate debugging of the zero gray scale binding point gamma voltage under each brightness level is realized.

It should be further noted that, because the corresponding RGB registers exist in the gray level tie points, the sub-pixels of different colors can also be distinguished by using their respective debugging coefficients at each luminance level, that is, the debugging coefficients can include the debugging coefficients corresponding to the red sub-pixel, the green sub-pixel, and the blue sub-pixel of the display module at each luminance level.

The gamma debugging parameters of the reference gray level tie point may include a first gamma debugging parameter corresponding to the red sub-pixel, a second gamma debugging parameter corresponding to the green sub-pixel, and a third gamma debugging parameter corresponding to the blue sub-pixel.

After the corresponding debugging coefficients are set for the sub-pixels of different colors, when the gamma debugging parameters of the zero gray scale binding points under each brightness level are obtained through calculation, the following steps can be executed:

and multiplying the first gamma debugging parameter of the reference gray scale binding point of the red sub-pixel at each brightness level by the debugging coefficient of the red sub-pixel at the corresponding brightness level to obtain the gamma debugging parameter when the red sub-pixel at each brightness level is at the zero gray scale binding point.

And multiplying the second gamma debugging parameter of the reference gray scale binding point of the green sub-pixel at each brightness level by the debugging coefficient of the green sub-pixel at the corresponding brightness level to obtain the gamma debugging parameter when the green sub-pixel at each brightness level is at the zero gray scale binding point.

It is understood that the above steps of calculating the gamma debugging parameters of the sub-pixels with different colors in the zero gray level binding point may be performed simultaneously or sequentially, and the sequence may be changed according to actual needs. And obtaining the gamma debugging parameters that the red sub-pixel, the green sub-pixel and the blue sub-pixel are in zero gray scale binding points under each brightness level, namely completing the gamma debugging of each pixel under all brightness levels.

For example, the following formula may be referred to obtain a gamma debugging parameter corresponding to a gamma voltage of each sub-pixel at a zero gray level binding point at each brightness level, thereby completing the gamma debugging at the zero gray level binding point.

R _0= R _1 × K1, where R _0 and R _1 correspond to gamma adjustment parameters corresponding to the red sub-pixel at the zero gray level binding point and the reference gray level binding point, and K1 is a first adjustment coefficient corresponding to the red sub-pixel.

G _0= G _1 × K2, where G _0 and G _1 correspond to gamma adjustment parameters corresponding to the green sub-pixel at the zero gray level tie point and the reference gray level tie point, and K2 is a second adjustment coefficient corresponding to the green sub-pixel.

B _0= B _1 × K3, where B _0 and B _1 correspond to the gamma adjustment parameters of the blue sub-pixel at the zero gray level tie point and the reference gray level tie point, and K3 is the third adjustment coefficient corresponding to the blue sub-pixel.

The corresponding debugging coefficients of the sub-pixels with different brightness levels and different colors can be different. In the examples, the corresponding debugging coefficient is set for each brightness level, so that the accurate debugging of the gamma voltages under different brightness levels can be realized, the condition that the sub-pixels with different colors under each brightness level can be written black at the zero gray scale binding point is ensured, and the phenomenon of smear can be improved.

Referring to fig. 3, in some optional examples, after S120, the following steps S130 to S160 may also be included.

S130, based on the gamma debugging parameters of the zero gray level binding points, the display module displays a zero gray level picture.

S140, the display module is switched from the zero gray scale frame to the high gray scale frame.

S150, if the smear degree of the display module is not satisfied with the preset requirement when the display module is switched from the zero-gray-scale picture to the high-gray-scale picture, adjusting the debugging coefficient, and returning to execute S120.

And S160, if the smear degree of the display module when the display module is switched from the zero gray scale picture to the high gray scale picture meets the preset requirement, burning the gamma debugging parameter of the zero gray scale binding point into a storage module of the display module.

In this example, a zero gray level picture may be displayed according to the obtained gamma debugging parameter of the zero gray level tie point, and then the zero gray level picture is switched to a high gray level picture (for example, a maximum gray level picture, such as a 255 gray level display picture, or other higher gray level display pictures), and the degree of smear of the picture is checked.

If the smear degree does not meet the preset requirement (for example, smear exists) when the picture is switched, the debugging coefficient can be adjusted, for example, the debugging coefficient is increased, new gamma debugging parameters of the zero gray level binding points are obtained again, then the zero gray level picture is continuously displayed according to the obtained gamma debugging parameters, the picture is switched, and the debugging coefficient is stopped being adjusted until the verified smear degree meets the preset requirement (for example, smear does not exist).

The gamma debugging parameters of the zero gray scale binding points meeting the preset requirements can be burnt into the storage module of the display module, and therefore the smearing degree verification and the corresponding debugging are achieved according to the obtained gamma debugging parameters of the zero gray scale binding points, and the display ghost when the follow-up display module displays can be well improved.

It should be noted that, in the gamma debugging process, may involve the multi-disc display module assembly, including present display module assembly and other display module assemblies except present display module assembly promptly, every display module assembly all needs to carry out the gamma debugging.

The gamma debugging parameters of the multi-piece display module during zero gray scale binding are different, but the debugging coefficients of the multi-piece display module are the same, and the smear problem can still be improved at the moment. So set up, only need obtain the debugging coefficient through a small amount of display module assembly (for example a slice display module assembly) tests and can be applicable to all display module assemblies, other display module assemblies need not to readjust the debugging coefficient for the light and dark degree of change of different display module assemblies when the picture switches is unanimous. Compared with the prior art, the method has the advantages that the method increases the compensation value, improves the applicability of the scheme, and shortens the gamma debugging time.

Another embodiment of the present application may further provide a display method of a display module, which may include a plurality of brightness levels when the display module displays. Wherein the plurality of brightness levels may include a first brightness level and a second brightness level, and the first brightness level may be greater than the second brightness level.

When displaying, the ratio of the gamma debugging parameter of the zero gray scale binding point at the first brightness level to the gamma debugging parameter of the reference gray scale binding point is greater than or equal to the ratio of the gamma debugging parameter of the zero gray scale binding point at the second brightness level to the gamma debugging parameter of the reference gray scale binding point, wherein the gamma debugging parameter comprises a gamma register value or a gamma voltage.

It should be noted that the above ratio corresponds to a debugging coefficient during gamma debugging. After the gamma debugging parameters of the zero gray scale binding points are written into the storage module of the display module, the display module can display each gray scale picture at different brightness levels according to the gamma debugging parameters stored in the storage module.

When the debugging coefficients under different brightness levels are set in a differentiation mode, the ratio of the gamma debugging parameters of the zero gray scale binding points under the first brightness level to the gamma debugging parameters of the reference gray scale binding points under the first brightness level can be slightly larger than the ratio of the gamma debugging parameters of the zero gray scale binding points under the second brightness level to the gamma debugging parameters of the reference gray scale binding points under the second brightness level, therefore, when a display module is displayed, the adjustment of the gamma debugging parameters of the zero gray scale binding points under the higher brightness level can be ensured to be larger, and the more obvious improvement of the smear can be further ensured.

When the ratios of different display modules at the same brightness level are designed consistently, the debugging coefficients can be obtained through a small number of display module tests, the brightness change degrees of different display modules during image switching at the same brightness level are consistent, and the scheme applicability is strong.

Fig. 4 shows a schematic hardware structure diagram of a gamma debugging apparatus of a display module according to an embodiment of the present application. In fig. 4, the gamma debugging apparatus of the display module comprises:

the obtaining module 310 may be configured to obtain gamma debugging parameters of a reference gray level tie point, where the gamma debugging parameters include a gamma register value or a gamma voltage;

the operation module 320 may be configured to multiply the gamma debugging parameter of the reference gray level tie point with the debugging coefficient to obtain a gamma debugging parameter of a zero gray level tie point.

The gamma debugging device of the display module can be used for executing the gamma debugging method of the display module in the embodiment, has the beneficial effects described in the embodiment, and is not repeated herein.

In some optional examples, the display module may include a plurality of brightness levels, and the operation module 320 may be configured to multiply the gamma debugging parameter of the reference gray level tie point at each brightness level by the debugging coefficient at the corresponding brightness level to obtain the gamma debugging parameter of the zero gray level tie point at each brightness level.

In other alternative examples, the operation module 320 may include:

the first operation unit can be used for multiplying a first gamma debugging parameter of a reference gray scale binding point of the red sub-pixel at each brightness level by a debugging coefficient of the red sub-pixel at the corresponding brightness level to obtain a gamma debugging parameter when the red sub-pixel at each brightness level is at a zero gray scale binding point;

the second operation unit can be used for multiplying a second gamma debugging parameter of the reference gray scale binding point of the green sub-pixel under each brightness level by the debugging coefficient of the green sub-pixel under the corresponding brightness level to obtain a gamma debugging parameter when the green sub-pixel under each brightness level is at a zero gray scale binding point;

the third operation unit can be used for multiplying a third gamma debugging parameter of the reference gray scale binding point of the blue sub-pixel at each brightness level by the debugging coefficient of the blue sub-pixel at the corresponding brightness level to obtain a gamma debugging parameter when the blue sub-pixel at each brightness level is at a zero gray scale binding point;

the gamma debugging parameters of the reference gray scale binding point comprise a first gamma debugging parameter corresponding to the red sub-pixel, a second gamma debugging parameter corresponding to the green sub-pixel and a third gamma debugging parameter corresponding to the blue sub-pixel.

In yet other alternative examples, the plurality of brightness levels includes a first brightness level and a second brightness level, the first brightness level being greater than the second brightness level;

the debug factor at the first brightness level is greater than the debug factor at the second brightness level.

In still other alternative examples, the obtaining module 310 may include:

the determining unit can be used for determining expected brightness ranges corresponding to a plurality of gray scale binding points under each brightness level, and the gray scale binding points comprise zero gray scale binding points and other gray scale binding points except the zero gray scale binding points;

the adjusting unit can be used for adjusting the gamma debugging parameters of other gray scale binding points under each brightness level so as to record the gamma debugging parameters when the display brightness of the other gray scale binding points is in a corresponding expected brightness range; other gray level ties include reference gray level ties.

In still other optional examples, the determining unit may include:

a determining subunit operable to determine a plurality of luminance levels, each luminance level corresponding to a plurality of gray scale bindings;

and the calculating subunit is used for calculating expected brightness ranges respectively corresponding to the plurality of gray scale binding points under each brightness level according to the gamma parameters corresponding to the brightness levels.

In still other alternative examples, the reference gray level binding is the next gray level binding relative to a zero gray level binding.

In still other optional examples, the apparatus may further comprise:

the display control module can be used for enabling the display module to display a zero gray scale picture based on a gamma debugging parameter of a zero gray scale binding point; switching the display module from a zero gray scale picture to a high gray scale picture;

the adjusting module can be used for adjusting the debugging coefficient if the smear degree of the display module does not meet the preset requirement when the display module is switched from a zero-gray-scale picture to a high-gray-scale picture, and returning to execute the operation: multiplying the gamma debugging parameters of the reference gray level binding points by the debugging coefficients to obtain the gamma debugging parameters of the zero gray level binding points;

the burning module can be used for burning the gamma debugging parameter of the zero gray scale binding point into the storage module of the display module if the smear degree of the display module when the display module is switched from the zero gray scale picture to the high gray scale picture meets the preset requirement.

Optionally, the debugging coefficient of display module assembly is the same with the debugging coefficient of the other display module assemblies of participating in gamma debugging, and the gamma debugging parameter of the reference grey scale tie of display module assembly is different with the gamma debugging parameter of the reference grey scale tie of other display module assemblies.

Fig. 5 shows a schematic hardware structure of a display device according to an embodiment of the present application. The display device may be at least one of a display panel (e.g., an OLED display panel), a home appliance, a wearable device, a mobile terminal, a virtual display device, and a display device in an automobile. The display device comprises a processor 401 and a memory 402 in which computer program instructions are stored.

Specifically, the processor 401 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more Integrated circuits of the embodiments of the present Application.

Memory 402 may include mass storage for data or instructions. By way of example, and not limitation, memory 402 may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, tape, or Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 402 may include removable or non-removable (or fixed) media, where appropriate. The memory 402 may be internal or external to the display device, where appropriate. In a particular embodiment, the memory 402 is a non-volatile solid-state memory.

The memory 402 may include Read Only Memory (ROM), flash memory devices, random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, the memory 402 includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) that may be encoded with software comprising computer-executable instructions and that, when executed (e.g., by one or more processors), is operable to perform operations described with reference to the methods in accordance with the above-described aspects of the disclosure.

The processor 401 reads and executes the computer program instructions stored in the memory 402 to implement the gamma debugging method of the display module or the display method of the display module in any of the above embodiments.

In one example, the display device may also include a communication interface 403 and a bus 410. As shown in fig. 5, the processor 401, the memory 402, and the communication interface 403 are connected via a bus 410 to complete communication therebetween.

The communication interface 403 is mainly used for implementing communication between modules, apparatuses, units and/or devices in this embodiment.

Bus 410 includes hardware, software, or both to couple the components of the display device to each other. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 410 may include one or more buses, where appropriate. Although specific buses are described and shown in the embodiments of the present application, any suitable buses or interconnects are contemplated by the present application.

The display device can be based on a gamma debugging method of the display module, so that the gamma debugging method and the gamma debugging device of the display module described in combination with the figures 1 to 4 can be realized.

In addition, in combination with the gamma debugging method of the display module in the above embodiment, the embodiment of the application can provide a computer storage medium to implement. The computer storage medium having computer program instructions stored thereon; when executed by the processor, the computer program instructions implement any one of the gamma debugging methods of the display module or the display method of the display module in the above embodiments.

In addition, an embodiment of the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps and corresponding contents of the gamma debugging method for the display module or the display method embodiment for the display module can be implemented.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

It should be understood that in the embodiment of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also be determined from a and/or other information.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention, and these modifications or substitutions are intended to be included in the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A gamma debugging method of a display module is characterized by comprising the following steps:

and multiplying the gamma debugging parameters of the reference gray scale binding points by a debugging coefficient to obtain the gamma debugging parameters of the zero gray scale binding points.

2. The method as claimed in claim 1, wherein the display module comprises a plurality of brightness levels, and the step of multiplying the gamma debugging parameters of the reference gray level tie by the debugging coefficients to obtain the gamma debugging parameters of the zero gray level tie comprises:

3. The method of claim 2, wherein the gamma debugging parameters of the reference gray level tie point comprise a first gamma debugging parameter corresponding to a red sub-pixel of the display module, a second gamma debugging parameter corresponding to a green sub-pixel of the display module, and a third gamma debugging parameter corresponding to a blue sub-pixel of the display module;

the multiplying the gamma debugging parameter of the reference gray scale binding point at each brightness level by the debugging coefficient at the corresponding brightness level to obtain the gamma debugging parameter of the zero gray scale binding point at each brightness level comprises:

multiplying a first gamma debugging parameter of the reference gray scale binding point of the red sub-pixel at each brightness level by a debugging coefficient of the red sub-pixel at the corresponding brightness level to obtain a gamma debugging parameter when the red sub-pixel at each brightness level is at the zero gray scale binding point;

multiplying a second gamma debugging parameter of the reference gray scale binding point of the green sub-pixel at each brightness level by a debugging coefficient of the green sub-pixel at the corresponding brightness level to obtain a gamma debugging parameter when the green sub-pixel at each brightness level is at the zero gray scale binding point;

4. The method of claim 2, wherein the plurality of brightness levels comprises a first brightness level and a second brightness level, the first brightness level being greater than the second brightness level;

the debugging coefficient under the first brightness level is larger than the debugging coefficient under the second brightness level.

5. The method of claim 2, wherein the obtaining gamma debugging parameters of the reference gray level binding point comprises:

determining expected brightness ranges corresponding to a plurality of gray scale binding points under each brightness level respectively, wherein the gray scale binding points comprise zero gray scale binding points and other gray scale binding points except the zero gray scale binding points;

adjusting the gamma debugging parameters of the other gray scale binding points under each brightness level to record the gamma debugging parameters when the display brightness of the other gray scale binding points is in a corresponding expected brightness range; the other gray level bindings include the reference gray level binding.

6. The method of claim 5, wherein determining the expected luminance ranges respectively corresponding to the plurality of gray scale bindings for each luminance level comprises:

7. The method according to any one of claims 1 to 6, wherein the reference gray level binding is the next gray level binding relative to the zero gray level binding.

8. The method of claim 1, further comprising, after obtaining gamma debugging parameters for a zero gray level tie:

enabling the display module to display a zero gray scale picture based on the gamma debugging parameter of the zero gray scale binding point;

if the smear degree of the display module when the display module is switched from a zero gray scale picture to a high gray scale picture does not meet the preset requirement, adjusting the debugging coefficient, and returning to execute the operation: multiplying the gamma debugging parameters of the reference gray scale binding points by a debugging coefficient to obtain gamma debugging parameters of zero gray scale binding points;

if the smear degree of the display module when the display module is switched from a zero gray scale picture to a high gray scale picture meets a preset requirement, burning the gamma debugging parameter of the zero gray scale binding point into a storage module of the display module;

preferably, if the smear degree of the display module when the display module is switched from a zero gray scale picture to a high gray scale picture meets a preset requirement, multiplying the current debugging coefficient of the display module by the gamma debugging parameters of the reference gray scale binding points of other display modules to obtain the gamma debugging parameters of the zero gray scale binding points of other display modules, and burning the gamma debugging parameters of the zero gray scale binding points of other display modules into the storage modules of other display modules; the display module assembly is different with at least some other display module assemblies the gamma debugging parameter of zero grey scale tie point.

9. The utility model provides a gamma debugging device of display module assembly which characterized in that, the device includes:

the device comprises an acquisition module, a detection module and a control module, wherein the acquisition module is used for acquiring gamma debugging parameters of reference gray scale binding points, and the gamma debugging parameters comprise gamma register values or gamma voltages;

10. A display method of a display module is characterized in that the display module comprises a plurality of brightness levels,

the ratio of the gamma debugging parameter of the zero gray scale binding point at the first brightness level to the gamma debugging parameter of the reference gray scale binding point is greater than the ratio of the gamma debugging parameter of the zero gray scale binding point at the second brightness level to the gamma debugging parameter of the reference gray scale binding point; wherein the gamma debugging parameters comprise gamma register values or gamma voltages.