CN110021268A - The display control method and device of OLED - Google Patents

The display control method and device of OLED Download PDF

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Publication number
CN110021268A
CN110021268A CN201910303294.8A CN201910303294A CN110021268A CN 110021268 A CN110021268 A CN 110021268A CN 201910303294 A CN201910303294 A CN 201910303294A CN 110021268 A CN110021268 A CN 110021268A
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value
grayscale value
oled
dgc
display control
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CN201910303294.8A
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CN110021268B (en
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刘晓龙
齐爱想
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BOE Technology Group Co Ltd
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BOE Technology Group 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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)

Abstract

The application proposes the display control method and device of a kind of OLED, wherein method includes: to obtain input grayscale value, and obtain current temperature value；Corresponding digital gamma curve DGC adjusted value is obtained according to current temperature value；Grayscale value is exported according to input grayscale value and DGC adjustment calculation；And OLED is controlled according to output grayscale value.The problem of this method can be realized according to current temperature value, compensates to input grayscale value, improves OLED colour cast under low temperature.Also, without the fitting heating glass on OLED, the original advantage of OLED can be retained, extend the application scenarios of OLED.

Description

The display control method and device of OLED
Technical field
This application involves field of display technology more particularly to the display control methods and device of a kind of OLED.
Background technique
Organic light emitting display (Organic Light Emitting Display, abbreviation OLED) is more popular at present Display technology, be compared to liquid crystal display (Liquid Crystal Display, abbreviation LCD), have it is frivolous, flexible, The advantages that low-power consumption, high contrast, high colour gamut, the especially response time under low temperature, the characteristic not being affected by temperature substantially, by To liking for more and more users.Currently, OLED light emitting structure is mostly that RGB independently shines, also there is white light to add color film knot Structure.Wherein, the design that RGB independently shines is limited and is influenced by luminescent material, at -10 DEG C of low temperature or less, white picture It can show partially blue.
In order to solve the problems, such as that it is partially blue that above-mentioned white picture is shown, in the related technology, by being bonded one piece of heating on OLED Glass.But in such a way that glass is heated in fitting, heating power consumption is higher, while the flexibility that will affect OLED itself again is frivolous The features such as, can not curved-surface display, to reduce the advantage of OLED.
Summary of the invention
The application proposes the display control method and device of a kind of OLED, to realize according to current temperature value, to input ash The problem of rank value compensates, and improves OLED colour cast under low temperature.Also, without the fitting heating glass on OLED, it can retain The original advantage of OLED, extends the application scenarios of OLED.
The application one side embodiment proposes the display control method of OLED a kind of, comprising:
Input grayscale value is obtained, and obtains current temperature value；
Corresponding digital gamma curve DGC adjusted value is obtained according to the current temperature value；
Grayscale value is exported according to the input grayscale value and the DGC adjustment calculation；And
The OLED is controlled according to the output grayscale value.
As the first possible implementation of the embodiment of the present application, described obtained according to the current temperature value is corresponded to Digital gamma curve DGC adjusted value, comprising:
The default table of comparisons is inquired according to the input grayscale value and the current temperature value to obtain corresponding DGC adjustment Value.
As second of possible implementation of the embodiment of the present application, the blue grayscale value among the default table of comparisons As the reduction of the Current Temperatures is gradually decreased with the first ratio, green grayscale value is as the reduction of the Current Temperatures is with Two ratios gradually decrease.
As the third possible implementation of the embodiment of the present application, first ratio and the second ratio phase Together.
As the 4th kind of possible implementation of the embodiment of the present application, the digital gamma curve is 2.2 gamma curves, The DGC adjusted value is a^2.2, and the input grayscale value is x, and the output grayscale value is y,
It is described that grayscale value is exported according to the input grayscale value and the DGC adjustment calculation, comprising:
As the corresponding brightness l of yyBrightness L corresponding equal to xxWhen, according to formula l255=a^2.2*L255And Lx=(x/ 255)^2.2*L255, it is calculated:
ly=(y/255) ^2.2*l255=(y/255) ^2.2*a^2.2*L255=[(y/a)/255] ^2.2*L255=Lx；
Y=ax.
The display control method of the OLED of the embodiment of the present application inputs grayscale value by obtaining, and obtains current temperature value, Then, corresponding digital gamma curve DGC adjusted value is obtained according to current temperature value, then, according to input grayscale value and DGC tune Whole value calculates output grayscale value, finally, being controlled according to output grayscale value OLED.As a result, according to current temperature value, to defeated The problem of entering grayscale value to compensate, improving OLED colour cast under low temperature.Also, it, can be with without the fitting heating glass on OLED Retain the original advantage of OLED, extends the application scenarios of OLED.
The another aspect embodiment of the application proposes the display control unit of OLED a kind of, comprising:
Temperature sensor for obtaining input grayscale value, and obtains current temperature value；
Processor, for obtaining corresponding digital gamma curve DGC adjusted value according to the current temperature value；
Sequence controller, for exporting grayscale value according to the input grayscale value and the DGC adjustment calculation；And root The OLED is controlled according to the output grayscale value.
As the first possible implementation of the embodiment of the present application, the processor is stored with the default table of comparisons, institute Processor is stated, is specifically used for:
The default table of comparisons is inquired according to the input grayscale value and the current temperature value to obtain corresponding DGC tune Whole value.
As second of possible implementation of the embodiment of the present application, the blue grayscale value among the default table of comparisons As the reduction of the Current Temperatures is gradually decreased with the first ratio, green grayscale value is as the reduction of the Current Temperatures is with Two ratios gradually decrease.
As the third possible implementation of the embodiment of the present application, first ratio and the second ratio phase Together.
As the 4th kind of possible implementation of the embodiment of the present application, the digital gamma curve is 2.2 gamma curves, The DGC adjusted value is a^2.2, and the input grayscale value is x, and the output grayscale value is y,
The sequence controller, is specifically used for:
When the corresponding brightness of y is lyBrightness corresponding equal to x is LxWhen, according to formula l255=a^2.2*L255And Lx= (x/255)^2.2*L255, it is calculated:
ly=(y/255) ^2.2*l255=(y/255) ^2.2*a^2.2*L255=[(y/a)/255] ^2.2*L255=Lx；
Y=ax.
The display control unit of the OLED of the embodiment of the present application inputs grayscale value by obtaining, and obtains current temperature value, Then, corresponding digital gamma curve DGC adjusted value is obtained according to current temperature value, then, according to input grayscale value and DGC tune Whole value calculates output grayscale value, finally, being controlled according to output grayscale value OLED.As a result, according to current temperature value, to defeated The problem of entering grayscale value to compensate, improving OLED colour cast under low temperature.Also, it, can be with without the fitting heating glass on OLED Retain the original advantage of OLED, extends the application scenarios of OLED.
The another aspect embodiment of the application proposes a kind of computer readable storage medium, is stored thereon with computer journey Sequence, which is characterized in that the display control method of OLED as in the preceding embodiment is realized when the program is executed by processor.
The additional aspect of the application and advantage will be set forth in part in the description, and will partially become from the following description It obtains obviously, or recognized by the practice of the application.
Detailed description of the invention
The application is above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of display screen；
Fig. 2 is the flow diagram of the display control method of OLED provided by the embodiment of the present application one；
Fig. 3 is current temperature value and the correspondence diagram for exporting grayscale value；
Fig. 4 is the application scenarios schematic diagram of the embodiment of the present application；
Fig. 5 is the modification schematic illustration of DGC adjusted value；
Fig. 6 is the flow diagram of the display control method of OLED provided by the embodiment of the present application two；
Fig. 7 is the structural schematic diagram of the display control unit of OLED provided by the embodiment of the present application three.
Specific embodiment
Embodiments herein is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the application, and should not be understood as the limitation to the application.
In the prior art, in order to solve the problems, such as that it is partially blue that white picture is shown, by being bonded one block of heating glass on OLED. For example, with reference to Fig. 1, wherein 1 expression OLED, 2 expression leads, 3 expression heating film-coated tin indium oxides (Indium Tin Oxid, Abbreviation ITO) glass, heating film-coated ito glass 3 is set under OLED1 screen.But in such a way that glass is heated in fitting, heating Power consumption is higher, at the same will affect again OLED itself flexibility it is frivolous the features such as, can not curved-surface display, so that it is original to reduce OLED Advantage.
Therefore, the application is mainly in such a way that glass is heated in fitting, heating power consumption is higher, simultaneously in the prior art Will affect again OLED itself flexibility it is frivolous the features such as, can not curved-surface display, to reduce the technology of the original advantage of OLED Problem proposes the display control method of OLED a kind of.
The display control method of the OLED of the embodiment of the present application inputs grayscale value by obtaining, and obtains current temperature value, Then, corresponding digital gamma curve DGC adjusted value is obtained according to current temperature value, then, according to input grayscale value and DGC tune Whole value calculates output grayscale value, finally, being controlled according to output grayscale value OLED.As a result, according to current temperature value, to defeated The problem of entering grayscale value to compensate, improving OLED colour cast under low temperature.Also, it, can be with without the fitting heating glass on OLED Retain the original advantage of OLED, extends the application scenarios of OLED.
Below with reference to the accompanying drawings the display control method and device of the OLED of the embodiment of the present application are described.Specifically describing this hair Before bright embodiment, in order to make it easy to understand, common technology word is introduced first:
Grayscale, in the image of display is shown, be by it is most bright with it is most dark between brightness change, divide into several pieces, Corresponding screen intensity control is inputted in order to carry out signal.Every digitized video be all as combined by many points made of, These points are also known as pixel, each usual pixel can show many different colors, it is by red, green, blue (RGB) three A sub-pixel composition.The light source of each sub-pixel, behind can show different gray scales.And grayscale represents By most secretly to the stratum level of different brightness most bright.This intermediate level is more, and the picture effect that can be presented is also It is finer and smoother.By taking 8 gray level images as an example, 256 (2 can be shown8) a luminance level, referred to as 256 grayscale.That is, screen The color change that each is put on curtain is brought by the grayscale value variation for constituting three RGB sub-pixels of this point in fact 's.
Fig. 2 is the flow diagram of the display control method of OLED provided by the embodiment of the present application one.
The executing subject of the embodiment of the present application is the display control unit of OLED, and the display control unit of the OLED can be by It is configured in any computer equipment, so that the computer equipment can execute the presentation control function of OLED.
Wherein, computer equipment can be any equipment with computing function, such as can be PC (Personal Computer, abbreviation PC), cloud device, mobile device etc., with no restriction to this.Mobile device for example may be used Think that mobile phone, tablet computer, personal digital assistant, wearable device etc. have various operating systems, touch screen and/or display screen Hardware device.
As shown in Fig. 2, the display control method of the OLED the following steps are included:
Step 101, input grayscale value is obtained, and obtains current temperature value.
It is understood that OLED, for showing image, the pixel value of each pixel is grayscale value in image.Therefore, originally Apply to determine corresponding input grayscale value according to each pixel in input picture in embodiment.Wherein, input picture For the image that OLED is to be shown.For example, the pixel value of the pixel A in input picture is 255, then pixel A is corresponding defeated Entering grayscale value is 255.
In the embodiment of the present application, current temperature value can be acquired by temperature sensor, worked as when temperature sensor collects After preceding temperature value, the control device of the OLED of the application can obtain the current temperature value from temperature sensor.
Step 102, corresponding digital gamma curve DGC adjusted value is obtained according to current temperature value.
It is understood that due to the characteristic that OLED is not affected by temperature, at a normal temperature, input grayscale value and output Grayscale value should be equal, wherein output grayscale value is display grayscale value to be shown.For example, input grayscale value is 255, output grayscale value is also 255.When the temperature is low, for example Current Temperatures are lower than -10 DEG C, at this point, white picture shows indigo plant partially, OLED the case where there are colour casts.Therefore, in the application, the problem of in order to improve OLED colour cast under low temperature, can determine with currently The corresponding digital gamma curve of temperature value (Digital Gamma Code, abbreviation DGC) adjusted value, with according to the DGC adjusted value, Input grayscale value is adjusted.
In the embodiment of the present application, different temperatures value and digital gamma curve (DIGITAL GAMMA can be preset CODE, abbreviation DGC) corresponding relationship between adjusted value can inquire above-mentioned corresponding relationship, really after determining current temperature value Fixed DGC adjusted value corresponding with current temperature value.
Step 103, grayscale value is exported according to input grayscale value and DGC adjustment calculation.
By the analysis to picture abnormal color, it has been found that white picture shows partially blue reason are as follows: when low temperature, figure The brightness of the corresponding red sub-pixel of each pixel is lower as in, and the brightness of blue subpixels and green sub-pixels does not become Change, is shown so as to cause picture partially blue.
As an example, applicant carries out low-temperature working test to the OLED display screen of a certain type, obtains in difference Cryogenic conditions under, grayscale value (this of the grayscale value (red grayscale value is denoted as in the application) of red sub-pixel, green sub-pixels Green grayscale value is denoted as in application) and blue subpixels grayscale value (blue grayscale value is denoted as in the application) value such as Fig. 3 Shown, Fig. 3 is current temperature value and the correspondence diagram for exporting grayscale value.From the figure 3, it may be seen that working as the grayscale of a certain pixel When value is 255, under cryogenic, the grayscale value of the corresponding red sub-pixel of the pixel with the reduction of current temperature value and It gradually decreases, and blue subpixels and the grayscale value of green sub-pixels do not change with the reduction of current temperature value, from And it is partially blue to cause picture to show.
It therefore,, can be by blue subpixels and the sub- picture of green in order to balance the brightness of three colors of RGB in the application The brightness of element reduces, and restores white picture color.Blue subpixels and the grayscale value of green sub-pixels can be reduced, with flat The grayscale value for three colors of RGB that weigh, so that white picture color be made to restore.
Specifically, green grayscale value to be output and blue grayscale can be calculated according to input grayscale value and DGC adjusted value Value, red grayscale value is constant, i.e., red grayscale value is equal to input grayscale value.For example, when input grayscale value is 255 (red grayscale When value, blue grayscale value, green grayscale value are 255), the corresponding red grayscale value of output grayscale value is 255, blue grayscale value It is 250, green grayscale value is also 250.
Step 104, OLED is controlled according to output grayscale value.
In the embodiment of the present application, after output grayscale value is calculated, OLED can be controlled according to output grayscale value System.
For example, for the pixel A in input picture, corresponding input grayscale value is 255 (red grayscale Value, blue grayscale value, green grayscale value are that 255), the corresponding red grayscale value of output grayscale value is 255, and blue grayscale value is 250, green grayscale value is 250, then when OLED shows correspondence image, corresponds to pixel A, the red grayscale value of display is 255, blue grayscale value is 250, and green grayscale value is 250.
Need to illustrate when, can also be by according to corresponding input grayscale for other pixels in input picture Value and DGC adjusted value, calculate corresponding output grayscale value.That is, for different input grayscale values, it can basis DGC adjusted value determines corresponding blue grayscale value to be output and green grayscale value.Thus, it is possible to realize adjustment input picture In the corresponding blue grayscale value of each pixel and green grayscale value, and red grayscale value remains unchanged, and may be implemented in low temperature Under the conditions of, the grayscale value of three colors of RGB is balanced, so that white picture color be made to restore, OLED colour cast is asked under improvement low temperature Topic.
In the embodiment of the present application, after determining current temperature value, DGC adjusted value can be determined according to current temperature value, it Afterwards, according to the DGC adjusted value, unified adjustment, available tune are carried out to the corresponding grayscale value of each pixel in input picture The corresponding grayscale value of each pixel (content OLED to be shown) after whole, so as to promote treatment effeciency.
The display control method of the OLED of the embodiment of the present application inputs grayscale value by obtaining, and obtains Current Temperatures, and Afterwards, corresponding digital gamma curve DGC adjusted value is obtained according to current temperature value, then, is adjusted according to input grayscale value and DGC Value calculates output grayscale value, finally, being controlled according to output grayscale value OLED.As a result, according to current temperature value, to input The problem of grayscale value compensates, and improves OLED colour cast under low temperature.Also, without fitting heating glass, Ke Yibao on OLED The original advantage of OLED is stayed, the application scenarios of OLED are extended.
As an example, referring to fig. 4, can by with analog-to-digital conversion (Analog-Digital Conversion, Abbreviation ADC) function Android master chip RK3288, to input grayscale value be adjusted.Specifically, temperature sensor can be passed through Current temperature value is acquired, for example, a Current Temperatures can be detected every preset duration (such as 5 minutes) by temperature sensor Value modifies sequence controller (the Timer Control of OLED according to current temperature value by the channel lane0 of RK3288 Register, abbreviation TCON) DGC adjusted value, so as to be adjusted to input grayscale value according to DGC adjusted value.By This, by RK3288, the problem of the DGC adjusted value of real time modifying OLED may be implemented, improve OLED colour cast under low temperature.
In Fig. 4, by the principle for modifying DGC adjusted value are as follows: for example, with reference to Fig. 5, by default, DGC can be by pixel The RGB grayscale value of point is double, another grayscale is inserted between two neighboring grayscale, changes input letter by fine tuning DGC Number grayscale value finally adjust the brightness shown on OLED by simulation gamma circuit and SOURCE IC.
As shown in Figure 5, adjustment DGC is equivalent to a part chosen on complete gamma curve, in order to guarantee gal adjusted Horse curve is still 2.2 curves, it is assumed that simulation gamma circuit is not influenced by temperature, and DGC can be carried out as follows tune It is whole:
Assuming that the corresponding DGC adjusted value of current temperature value is a^2.2, x is input grayscale value, and y is output ash adjusted Rank value, LxTo adjust the corresponding brightness of preceding x, lyFor the corresponding brightness of x after adjustment.Wherein, l255=a^2.2*L255, Lx=(x/ 255)^2.2*L255, it is 255 corresponding brightness l when measuring grayscale value255When, if the corresponding brightness of grayscale value adjusted and tune Brightness before whole is equal, then available:
ly=(y/255) ^2.2*l255=(y/255) ^2.2*a^2.2*L255=[(y/a)/255] ^2.2*L255=Lx；
Due to Lx=(x/255) ^2.2*L255, can determine y/a=x, i.e. y=ax.
That is, all input grayscale values can be reduced according to a certain percentage, so that it may guarantee 2.2 gamma curves, To guarantee the display effect of display screen.
It therefore,, can be by corresponding input grayscale for each pixel in input picture for step 103 Value, is multiplied with a in DGC adjusted value, obtains output grayscale value.Wherein, the corresponding red grayscale value of each pixel is constant, Green grayscale value is with blue grayscale value as output grayscale value is adjusted.
As a kind of possible implementation, in order to promote the regulated efficiency of grayscale value, for each grayscale value, Ke Yitong It crosses experiment and obtains the grayscale value corresponding DGC adjusted value under different temperatures value, and by above-mentioned grayscale value, temperature value and DGC tune Corresponding relationship between whole value is stored in the default table of comparisons, thus, in the application, determining input grayscale value and Current Temperatures After value, the above-mentioned default table of comparisons can be inquired, DGC adjusted value corresponding with input grayscale value and current temperature value is obtained, to mention The search efficiency for rising DGC, to promote the regulated efficiency of grayscale value.Below with reference to Fig. 6, above process process is described in detail.
Fig. 6 is the flow diagram of the display control method of OLED provided by the embodiment of the present application two.
As shown in fig. 6, the display control method of the OLED may comprise steps of:
Step 201, input grayscale value is obtained, and obtains current temperature value.
The implementation procedure of step 201 may refer to the implementation procedure of step 101 in above-described embodiment, and this will not be repeated here.
Step 202, the default table of comparisons is inquired according to input grayscale value and current temperature value to adjust to obtain corresponding DGC Value.
In the embodiment of the present application, for each grayscale value, low-temperature working experiment can be carried out to OLED in advance, simulated The corresponding DGC adjusted value of the grayscale value under different temperatures, and by the correspondence between above-mentioned grayscale value, temperature value and DGC adjusted value Relationship is stored in the default table of comparisons.
Therefore, it after determining input grayscale value and current temperature value, can be looked into according to input grayscale value and current temperature value The above-mentioned default table of comparisons is ask, DGC adjusted value corresponding with input grayscale value and current temperature value is obtained.
Further, since the corresponding DGC adjustment of different types of OLED can be same or different, the application In, it, can be in advance for each type of for each grayscale value in order to promote the accuracy of DGC adjusted value definitive result OLED carries out low-temperature working experiment, simulates the corresponding DGC adjusted value of the grayscale value at different temperatures.
Step 203, grayscale value is exported according to input grayscale value and DGC adjustment calculation.
Step 204, OLED is controlled according to output grayscale value.
The implementation procedure of step 203 to 204 may refer to the implementation procedure of step 103 to 104 in above-described embodiment, herein It does not repeat them here.
It should be noted that, although color membrane structure can be added by the way that the light emitting structure of OLED is changed to white light by RGB, Come the problem of improving OLED colour cast under low temperature, still, white light adds the higher power consumption of color membrane structure, brightness, contrast and colour gamut, phase The structure independently to shine for RGB is lower.
Alternatively, the more stable luminescent material of temperature characterisitic can also be researched and developed, under Lai Gaishan low temperature the problem of OLED colour cast, But research and development higher cost.
And in the application, grayscale value is exported according to input grayscale value and DGC adjustment calculation, without sacrificing luminance, comparison Degree and colour gamut, while on the basis of not increasing heating power consumption, and on the basis of not increasing research and development cost, can improve low Under temperature the problem of OLED colour cast, the application scenarios of OLED are extended.
Technical solution in above-mentioned the embodiment of the present application at least also has further below compared to a upper embodiment Technical effect or advantage:
It, can by inquiring the default table of comparisons according to input grayscale value and current temperature value to obtain corresponding DGC adjusted value To promote the search efficiency of DGC, to promote the regulated efficiency of grayscale value.
As a kind of possible implementation, be also provided in the default table of comparisons input grayscale value, temperature value with it is defeated Corresponding relationship between grayscale value out, thus, it, can be direct after determining input grayscale value and current temperature value in the application The above-mentioned default table of comparisons is inquired, determines corresponding input grayscale value.
For example, applicant carries out low-temperature working experiment to the OLED display screen of a certain model, simulating input grayscale value is When 255, output grayscale value at different temperatures (red grayscale value, blue grayscale value and green grayscale value).
Table 1 presets the table of comparisons
As shown in Table 1, in the default table of comparisons, blue grayscale value and green grayscale value with the reduction of Current Temperatures and by It gradually reduces, red grayscale value does not adjust.
As a kind of possible implementation, blue grayscale value can with the reduction of current temperature value with the first ratio by It gradually reduces, green grayscale value can be gradually decreased with the reduction of Current Temperatures with the second ratio.For example, as shown in Table 1, first Ratio is identical with the second ratio.Certainly, the first ratio and the second ratio can also be different, specifically can be according to different model OLED display screen carries out low-temperature working experiment, and test obtains.
In order to realize above-described embodiment, the application also proposes the display control unit of OLED a kind of.
Fig. 7 is the structural schematic diagram of the display control unit of OLED provided by the embodiment of the present application three.
As shown in fig. 7, the display control unit 100 of the OLED includes: temperature sensor 101, processor 102 and timing Controller 103.
Wherein, temperature sensor 101 for obtaining input grayscale value, and obtain Current Temperatures.
Processor 102, for obtaining corresponding digital gamma curve DGC adjusted value according to current temperature value.
As an example, referring to fig. 4, processor 102 can be the Android master chip RK3288 with ADC function.
As a kind of possible implementation, processor 102 is stored with the default table of comparisons, and processor 102 is specifically used for: root The default table of comparisons is inquired according to input grayscale value and current temperature value to obtain corresponding DGC adjusted value.
As a kind of possible implementation, presets the table of comparisons and obtained by experiment.
As a kind of possible implementation, among the default table of comparisons blue grayscale value with the reduction of Current Temperatures with First ratio gradually decreases, and green grayscale value is gradually decreased with the reduction of Current Temperatures with the second ratio.
As a kind of possible implementation, the first ratio is identical with the second ratio.
Sequence controller 103 is used to export grayscale value according to input grayscale value and DGC adjustment calculation, and according to defeated Grayscale value controls OLED out.
As a kind of possible implementation, digital gamma curve is 2.2 gamma curves, and DGC adjusted value is a^2.2, defeated Entering grayscale value is x, and output grayscale value is y, and sequence controller 103 is specifically used for: when the corresponding brightness of y is lyIt is corresponding equal to x Brightness is LxWhen, according to formula l255=a^2.2*L255And Lx=(x/255) ^2.2*L255, it is calculated:
ly=(y/255) ^2.2*l255=(y/255) ^2.2*a^2.2*L255=[(y/a)/255] ^2.2*L255=Lx；
→ y=ax.
It should be noted that the explanation of the aforementioned display control method embodiment to OLED is also applied for the embodiment OLED display control unit 100, details are not described herein again.
The display control unit of the OLED of the present embodiment inputs grayscale value by obtaining, and obtains Current Temperatures, then, Corresponding digital gamma curve DGC adjusted value is obtained according to current temperature value, then, according to input grayscale value and DGC adjusted value Output grayscale value is calculated, finally, controlling according to output grayscale value OLED.As a result, according to current temperature value, to input ash The problem of rank value compensates, and improves OLED colour cast under low temperature.Also, without the fitting heating glass on OLED, it can retain The original advantage of OLED, extends the application scenarios of OLED.
In order to realize above-described embodiment, the application also proposes a kind of computer equipment, comprising: memory, processor and deposits The computer program that can be run on a memory and on a processor is stored up, when processor executes program, is realized as the application is aforementioned The display control method of the OLED proposed in embodiment.
In order to realize above-described embodiment, the application also proposes a kind of computer readable storage medium, is stored thereon with calculating Machine program, which is characterized in that realize that the OLED's proposed in such as the application previous embodiment is aobvious when the program is executed by processor Show control method.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the application.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present application, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes It is one or more for realizing custom logic function or process the step of executable instruction code module, segment or portion Point, and the range of the preferred embodiment of the application includes other realization, wherein can not press shown or discussed suitable Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be by the application Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the application can be realized with hardware, software, firmware or their combination.Above-mentioned In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage Or firmware is realized.Such as, if realized with hardware in another embodiment, following skill well known in the art can be used Any one of art or their combination are realized: have for data-signal is realized the logic gates of logic function from Logic circuit is dissipated, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile Journey gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, can integrate in a processing module in each functional unit in each embodiment of the application It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above Embodiments herein is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as the limit to the application System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of application Type.

Claims (11)

1. a kind of display control method of OLED characterized by comprising
Input grayscale value is obtained, and obtains current temperature value；
Corresponding digital gamma curve DGC adjusted value is obtained according to the current temperature value；
Grayscale value is exported according to the input grayscale value and the DGC adjustment calculation；And
Display control is carried out to the OLED according to the output grayscale value.
2. the display control method of OLED as described in claim 1, which is characterized in that described to be obtained according to the current temperature value Take corresponding digital gamma curve DGC adjusted value, comprising:
The default table of comparisons is inquired according to the input grayscale value and the current temperature value to obtain corresponding DGC adjusted value.
3. the display control method of OLED as claimed in claim 2, which is characterized in that blue among the default table of comparisons Grayscale value is gradually decreased with the reduction of the Current Temperatures with the first ratio, green grayscale value with the Current Temperatures drop It is low to be gradually decreased with the second ratio.
4. the display control method of OLED as claimed in claim 3, which is characterized in that first ratio and second ratio Example is identical.
5. the display control method of OLED as described in claim 1, which is characterized in that the digital gamma curve is 2.2 gals Horse curve, the DGC adjusted value are a^2.2, and the input grayscale value is x, and the output grayscale value is y,
It is described that grayscale value is exported according to the input grayscale value and the DGC adjustment calculation, comprising:
As the corresponding brightness l of yyBrightness L corresponding equal to xxWhen, according to formula l255=a^2.2*L255And Lx=(x/255) ^ 2.2*L255, it is calculated:
ly=(y/255) ^2.2*l255=(y/255) ^2.2*a^2.2*L255=[(y/a)/255] ^2.2*L255=Lx；
Y=ax.
6. a kind of display control unit of OLED characterized by comprising
Temperature sensor for obtaining input grayscale value, and obtains current temperature value；
Processor, for obtaining corresponding digital gamma curve DGC adjusted value according to the current temperature value；
Sequence controller, for exporting grayscale value according to the input grayscale value and the DGC adjustment calculation；And according to institute Output grayscale value is stated to control the OLED.
7. the display control unit of OLED as claimed in claim 6, which is characterized in that the processor is stored with default control Table, the processor, is specifically used for:
The default table of comparisons is inquired according to the input grayscale value and the current temperature value to obtain corresponding DGC adjustment Value.
8. the display control unit of OLED as claimed in claim 7, which is characterized in that blue among the default table of comparisons Grayscale value is gradually decreased with the reduction of the Current Temperatures with the first ratio, green grayscale value with the Current Temperatures drop It is low to be gradually decreased with the second ratio.
9. the display control unit of OLED as claimed in claim 8, which is characterized in that first ratio and second ratio Example is identical.
10. the display control unit of OLED as claimed in claim 8, which is characterized in that the digital gamma curve is 2.2 gals Horse curve, the DGC adjusted value are a^2.2, and the input grayscale value is x, and the output grayscale value is y,
The sequence controller, is specifically used for:
When the corresponding brightness of y is lyBrightness corresponding equal to x is LxWhen, according to formula l255=a^2.2*L255And Lx=(x/ 255)^2.2*L255, it is calculated:
ly=(y/255) ^2.2*l255=(y/255) ^2.2*a^2.2*L255=[(y/a)/255] ^2.2*L255=Lx；
Y=ax.
11. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor The display control method such as OLED as claimed in any one of claims 1 to 5 is realized when execution.
CN201910303294.8A 2019-04-16 2019-04-16 Display control method and device of OLED Active CN110021268B (en)

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