CN107038995A - A kind of white point color-complementing method, device and the display device of WOLED devices - Google Patents
A kind of white point color-complementing method, device and the display device of WOLED devices Download PDFInfo
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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]
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Abstract
The invention discloses a kind of white point color-complementing method, color-complementing device and the display device of WOLED devices, the color-complementing method includes：The degree of aging of WOLED devices is detected, the degree of aging data of WOLED devices are determined；Degree of aging data and the compensating proportion database prestored are contrasted, it is determined that the compensating proportion of correspondence degree of aging data；WOLED devices are compensated according to the compensating proportion of determination.Degree of aging so by detecting current WOLED devices, compensated for current WOLED degree of aging using corresponding compensating proportion, relative in the prior art using a kind of fixed compensating proportion progress white balance compensation, accurate complementary color can be realized, the compensation degree of accuracy is improved, so as to realize that the white balance of WOLED devices under different degree of agings is accurately compensated.
Description
Technical Field
The invention relates to the technical field of display, in particular to a white point complementary color method and device of a WOLED device and a display device.
Background
In nature, any color can be obtained by matching RGB three primary colors with different proportions. Currently, a White Organic Light Emitting Diode (WOLED) product with a medium and large size generally implements color display based on White W + RGB color technology. The pixels of the WOLED product are composed of sub-pixels with four colors of red, green, blue and white, the red, green and blue light emitted by the red, green and blue sub-pixels are the red, green and blue light obtained by a WOLED device (emitting white light) through red, green and blue color films, and the light emitted by the white sub-pixel is the white light directly emitted by the WOLED device. Therefore, when the product needs to display white, the white sub-pixel is turned on, but the light emitted by the white sub-pixel is the light of the WOLED device, but because the color point of the white sub-pixel in the WOLED is not the target white point displayed by the display panel, the light of the WOLED device is difficult to completely conform to the white point specification of the product, so that the sub-pixel of one or two other colors is required to emit light of corresponding colors according to a certain proportion, and the light of the white sub-pixel is mixed with the light of the white sub-pixel to obtain the white point (the color coordinate of the white picture) of the product, so as to achieve the target white point, namely, the white balance compensation technology.
Specifically, the white balance compensation technology is to acquire the color point of RGBW of the WOLED device, calculate through a color coordinate, obtain a white balance compensation proportion, and write the white balance compensation proportion into a driver. However, in the conventional compensation scheme, the compensation ratio is fixed, but as the WOLED ages, the spectrum of the light emitted by the white sub-pixel changes, and the color point changes accordingly (referred to as "aged color difference"), if the compensation is still performed according to the most original compensation ratio, the problem that the white balance cannot compensate the target white point is caused. For example, at a drive current density of 10mA/cm 2, it can be seen from Table 1 that:
TABLE 1
When a white picture needs to be displayed in the initial state of the WOLED, the R and the B respectively emit 1.11% and 0.89% of brightness for compensation, and the target white point can be achieved, namely the RGBW mixed color brightness ratio is as follows: 1.11: 0: 0.89: when 98, the target white point (0.285,0.3) can be obtained; when WOLED displays white picture at LT60, R and B need to respectively emit 1.13% and 9.62% of brightness for compensation to achieve the target white point, that is, the RGBW mixed color brightness ratio is: 1.13: 0: 9.62: at 89.25, the target white point (0.285,0.3) was obtained. Therefore, as the WOLED ages, the color coordinates of the white sub-pixel change, and the color coordinates of RGB are affected, and the final color mixing ratio is different. The conventional white balance compensation adopts a fixed compensation proportion for compensation, so that the brightness of the WOLED device is greatly changed along with the aging of the WOLED device, and the white balance compensation is inaccurate.
Therefore, how to implement white point compensation for WOLED devices with different aging degrees and improve the white balance compensation accuracy of WOLED products is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a white point color complementing method and device of a WOLED device and a display device, and aims to solve the problem that WOLED white balance compensation is inaccurate in the prior art.
The embodiment of the invention provides a white point complementary color method of a WOLED device, which comprises the following steps:
detecting the aging degree of the WOLED device, and determining aging degree data of the WOLED device;
comparing the aging degree data with a pre-stored compensation proportion database, and determining the compensation proportion corresponding to the aging degree data;
and compensating the WOLED device according to the determined compensation proportion.
In a possible implementation manner, in the white point color complementing method provided by an embodiment of the present invention, detecting the aging degree of the WOLED device, and determining the aging degree data of the WOLED device specifically includes:
carrying out aging detection on the current WOLED device under the drive of a preset drive current to obtain color coordinates of each color pixel of the WOLED device; wherein the WOLED device comprises pixels of four colors of red, green, blue and white;
and determining the aging degree data of the WOLED device at present according to the acquired color coordinates of the pixels of each color.
In a possible implementation manner, in the white point color compensating method provided by an embodiment of the present invention, comparing the aging degree data with a pre-stored compensation ratio database, and determining a compensation ratio corresponding to the aging degree data specifically includes:
comparing the aging degree data with the compensation proportion database, and determining a compensation gradient corresponding to the aging data; wherein the compensation proportion database comprises a plurality of compensation gradients, and each compensation gradient corresponds to one compensation proportion;
and determining a compensation proportion corresponding to the compensation gradient according to the determined compensation gradient.
In a possible implementation manner, in the white point complementary color method provided by the embodiment of the present invention, the compensation ratio is a ratio of light emission luminance of a pixel of three colors of red, blue and white when a white color point coordinate of the current WOLED device is the same as a target white point coordinate.
The embodiment of the invention provides a white point complementary color device of a WOLED device, which comprises: the device comprises a detection module, a determination module and a compensation module; wherein,
the detection module is used for detecting the aging degree of the WOLED device and determining the aging degree data of the WOLED device;
the determining module is used for comparing the aging degree data with a pre-stored compensation proportion database and determining the compensation proportion corresponding to the aging degree data;
the compensation module is used for compensating the WOLED device according to the determined compensation proportion.
In a possible implementation manner, in the white point color compensation device provided in an embodiment of the present invention, the detection module is specifically configured to:
carrying out aging detection on the current WOLED device under the drive of a preset drive current to obtain color coordinates of each color pixel of the WOLED device; wherein the WOLED device comprises pixels of four colors of red, green, blue and white;
and determining the aging degree data of the WOLED device at present according to the acquired color coordinates of the pixels of each color.
In a possible implementation manner, in the white point color compensation device provided in an embodiment of the present invention, the determining module is specifically configured to:
comparing the aging degree data with the compensation proportion database, and determining a compensation gradient corresponding to the aging data; wherein the compensation proportion database comprises a plurality of compensation gradients, and each compensation gradient corresponds to one compensation proportion;
and determining a compensation proportion corresponding to the compensation gradient according to the determined compensation gradient.
In a possible implementation manner, in the above white point color compensation apparatus provided by the embodiment of the present invention, the compensation ratio is a ratio of light emission luminance of a pixel of three colors of red, blue, and white when a white color point coordinate of the current WOLED device is the same as a target white point coordinate.
The embodiment of the invention provides a display device which comprises the white point complementary color device of the WOLED device provided by the embodiment of the invention.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a white point complementary color method, a complementary color device and a display device of a WOLED device, wherein the complementary color method comprises the following steps: detecting the aging degree of the WOLED device, and determining the aging degree data of the WOLED device; comparing the aging degree data with a pre-stored compensation proportion database, and determining the compensation proportion corresponding to the aging degree data; and compensating the WOLED device according to the determined compensation proportion. Therefore, the aging degree of the current WOLED device is detected, the corresponding compensation proportion is adopted for compensating the aging degree of the current WOLED device, and compared with the prior art that white balance compensation is carried out by adopting a fixed compensation proportion, accurate color compensation can be realized, the compensation accuracy is improved, and therefore white balance accurate compensation of the WOLED device under different aging degrees is realized.
Drawings
Fig. 1 is a flowchart of a white point color compensating method for a WOLED device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a white point color compensating apparatus of a WOLED device according to an embodiment of the present invention.
Detailed Description
The following describes in detail specific embodiments of a white point color compensating method, a color compensating device and a display device of a WOLED device according to an embodiment of the present invention with reference to the accompanying drawings.
The embodiment of the invention provides a white point complementary color method of a WOLED device, as shown in FIG. 1, comprising the following steps:
s101, detecting the aging degree of the WOLED device, and determining the aging degree data of the WOLED device;
s102, comparing the aging degree data with a pre-stored compensation proportion database, and determining the compensation proportion corresponding to the aging degree data;
s103, compensating the WOLED device according to the determined compensation proportion.
In the white point color complementing method provided by the embodiment of the invention, the aging degree of the current WOLED device is detected, the corresponding compensation proportion is adopted for compensating the aging degree of the current WOLED, and compared with the prior art that the white balance compensation is carried out by adopting a fixed compensation proportion, the accurate color complementing can be realized, the compensation accuracy is improved, and the white balance accurate compensation of the WOLED device under different aging degrees is realized.
Specifically, the current WOLED has target white point color coordinates of (0.285, 0.30) in the display field, while WOLED generally cannot achieve the white point of the display with color coordinates of (0.285, 0.30), so that other colors are added for compensation to achieve the target white point (0.285, 0.30). The formula for color mixing is as follows:
wherein x isryr，xgyg，xbybRespectively RGB color coordinates, and Lr, Lg, Lb respectively RGB hairLuminance, xy, is the color coordinate of the target white point.
As can be seen from the formula, the color coordinate of any color can be obtained by mixing the three colors of RGB. If one color of RGB is changed into the color coordinate of W, mixing the color coordinates with other two colors, and obtaining a target white point (x, y) — (0.285, 0.3); the brightness ratio of RGB required by the target point calculated by the above formula can be realized, that is, the white balance compensation ratio can be realized by converting one color into W to mix with the other two colors. As can be seen from the formula, the target white point (x, y) is fixed, and the luminance ratio obtained varies depending on the color coordinates of the mixed color component, and the color coordinates vary, and the mixed color ratio thereof also varies. Therefore, the color coordinates of W change and affect the color coordinates of RGB, and the final color mixing ratio is also different. As the WOLED device ages, when its luminance brightness is different, the color point of W is different, and the white balance compensation ratio is also different. For example: under the current density of 10mA/cm ^2, the color coordinate of the WOLED initial state is (0.2867, 0.3078), and the color coordinates of the corresponding RGB are (0.649, 0.339), (0.224, 0.678), (0.136, 0.076) respectively; the calculated ratio is W98%, R1.11%, and B0.89%. While when the WOLED ages to LT60 stage, the WOLED color point becomes (0.3718, 0.4388) when the current density is still at 10mA/cm 2, and if compensated for as well according to the above ratio, the WOLED product exhibits a white color point of (0.3640, 0.4196), resulting in complementary color "failure".
Therefore, as the RGB components in the WOLED aging device have different attenuation amounts and attenuation speeds, the color point can be changed, and the invention selects the corresponding complementary color proportion according to the different WOLED aging degrees, thereby realizing accurate complementary color and realizing accurate white balance compensation of the WOLED device under different aging degrees. The white picture color points that reached the various stages were all the target white points (0.285, 0.3).
In specific implementation, in the white point complementary color method provided in the embodiment of the present invention, step S101 specifically includes: carrying out aging detection on the current WOLED device under the drive of a preset drive current to obtain color coordinates of each color pixel of the WOLED device; the WOLED device comprises pixels of four colors of red, green, blue and white; and determining the aging degree data of the current WOLED device according to the acquired color coordinates of the pixels of each color. Specifically, the process of detecting the aging of the WOLED device to extract the WOLED aging information and determining the aging data of the WOLED device according to the extracted WOLED aging information is the same as the prior art and will not be described in detail herein.
In specific implementation, in the white point complementary color method provided in the embodiment of the present invention, step S102 specifically includes: comparing the aging degree data with a compensation proportion database, and determining a compensation gradient corresponding to the aging data; the compensation proportion database comprises a plurality of compensation gradients, and each compensation gradient corresponds to one compensation proportion; and determining a compensation proportion corresponding to the compensation gradient according to the determined compensation gradient. In particular, the white point complementary color method of the present invention is directed to the aging degree of the WOLED device, the color point of which will change, and because the color point of the WOLED changes, different compensation ratios are selected to obtain the standard target color point, instead of the conventional fixed-ratio color point compensation. Different WOLED devices have different attenuation speeds, and some WOLED devices have smaller color point change along with aging, so that fewer compensation gradients can be divided; some WOLEDs have a large variation in color point in the morning, more compensation gradients can be divided. Therefore, the compensation proportion can be divided into a proper number of compensation gradients according to the characteristics of a specific WOLED device (namely the attenuation speed and proportion of RGB components in the device), so that accurate compensation of the WOLED can be realized, and the accuracy of WOLED white balance compensation is improved.
In practical implementation, in the white point complementary color method provided by the embodiment of the present invention, the compensation ratio is the luminance ratio of the red, blue and white pixels when the color point coordinate of the white sub-pixel of the current WOLED device is the same as the target white point coordinate. In particular, because the light emitted by a general WOLED device is deviated from yellow light, the red, blue and white sub-pixels are selected for mixed light compensation, and white balance compensation is realized. In specific implementation, the sub-pixels of the corresponding color and the white sub-pixels may be selected to mix light according to the characteristics of the WOLED device, so as to implement white balance compensation, which is not limited herein.
Based on the same inventive concept, an embodiment of the present invention provides a white point color complementing apparatus for a WOLED device, as shown in fig. 2, which may include: the device comprises a detection module 01, a determination module 02 and a compensation module 03; wherein,
the detection module 01 is used for detecting the aging degree of the WOLED device and determining the aging degree data of the WOLED device;
the determining module 02 is used for comparing the aging degree data with a pre-stored compensation proportion database and determining the compensation proportion corresponding to the aging degree data;
the compensation module 03 is used for compensating the WOLED device according to the determined compensation proportion.
In the white point color compensation device provided by the embodiment of the invention, the aging degree of the current WOLED device is detected by the detection module, the compensation proportion corresponding to the aging degree of the current WOLED is determined by the determination module, so that the compensation module compensates the aging degree of the current WOLED by adopting the corresponding compensation proportion, the accurate color compensation can be realized, the compensation accuracy is improved, and the accurate white balance compensation of the WOLED device under different aging degrees is realized.
In a specific implementation, in the white point color compensation device provided in the embodiment of the present invention, the detection module is specifically configured to: carrying out aging detection on the current WOLED device under the drive of a preset drive current to obtain color coordinates of each color pixel of the WOLED device; the WOLED device comprises pixels of four colors of red, green, blue and white; and determining the aging degree data of the current WOLED device according to the acquired color coordinates of the pixels of each color. Specifically, in the white point color compensation device provided in the embodiment of the present invention, the detection module may perform aging detection on the WOLED device to extract WOLED aging information, determine aging degree data of the WOLED device according to the extracted WOLED aging information, and a process of extracting the WOLED aging information to determine the aging degree of the WOLED device is the same as that in the prior art, and will not be described in detail herein.
In a specific implementation, in the white point color compensation device provided in the embodiment of the present invention, the determining module is specifically configured to: comparing the aging degree data with a compensation proportion database, and determining a compensation gradient corresponding to the aging data; the compensation proportion database comprises a plurality of compensation gradients, and each compensation gradient corresponds to one compensation proportion; and determining a compensation proportion corresponding to the compensation gradient according to the determined compensation gradient. Specifically, different WOLED devices have different attenuation speeds, and some WOLED devices have smaller color point change along with aging, so that fewer compensation gradients can be divided; some WOLEDs have a large variation in color point in the morning, more compensation gradients can be divided. Therefore, the compensation proportion can be divided into a proper number of compensation gradients according to the characteristics of a specific WOLED device (namely the attenuation speed and proportion of RGB components in the device), so that accurate compensation of the WOLED can be realized, and the accuracy of WOLED white balance compensation is improved. As shown in table 1, the aging stage of a WOLED device can be divided into LT00, LT95, LT90 … …, and each attenuation of 5% is replaced by a compensation gradient corresponding to a compensation proportion, so that the determining module can determine the compensation gradient according to the aging data of the WOLED device, and further determine the corresponding compensation proportion.
In practical implementation, in the white point color compensation apparatus provided by the embodiment of the present invention, the compensation ratio is a luminance ratio of the red, blue, and white pixels when the white point coordinate of the current WOLED device is the same as the target white point coordinate. In particular, because the light emitted by a general WOLED device is deviated from yellow light, the red, blue and white sub-pixels are selected for mixed light compensation, and white balance compensation is realized. In specific implementation, the sub-pixels of the corresponding color and the white sub-pixels may be selected to mix light according to the characteristics of the WOLED device, so as to implement white balance compensation, which is not limited herein.
Based on the same inventive concept, the embodiment of the invention provides a display device, which comprises the white point complementary color device of the WOLED device provided by the embodiment of the invention. The display device can be applied to any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Because the principle of solving the problems of the display device is similar to that of the white point complementary color device of the WOLED device, the implementation of the display device can refer to the implementation of the white point complementary color device of the WOLED device, and repeated parts are not repeated.
The embodiment of the invention provides a white point complementary color method, a complementary color device and a display device of a WOLED device, wherein the complementary color method comprises the following steps: detecting the aging degree of the WOLED device, and determining the aging degree data of the WOLED device; comparing the aging degree data with a pre-stored compensation proportion database, and determining the compensation proportion corresponding to the aging degree data; and compensating the WOLED device according to the determined compensation proportion. Therefore, the aging degree of the current WOLED device is detected, the corresponding compensation proportion is adopted for compensating the aging degree of the current WOLED device, and compared with the prior art that white balance compensation is carried out by adopting a fixed compensation proportion, accurate color compensation can be realized, the compensation accuracy is improved, and therefore white balance accurate compensation of the WOLED device under different aging degrees is realized.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A white point complementary color method of a WOLED device is characterized by comprising the following steps:
detecting the aging degree of the WOLED device, and determining aging degree data of the WOLED device;
comparing the aging degree data with a pre-stored compensation proportion database, and determining the compensation proportion corresponding to the aging degree data;
and compensating the WOLED device according to the determined compensation proportion.
2. The white point complementary color method of claim 1, wherein detecting the aging degree of the WOLED device and determining the aging degree data of the WOLED device specifically comprises:
carrying out aging detection on the current WOLED device under the drive of a preset drive current to obtain color coordinates of each color pixel of the WOLED device; wherein the WOLED device comprises pixels of four colors of red, green, blue and white;
and determining the aging degree data of the WOLED device at present according to the acquired color coordinates of the pixels of each color.
3. The white point complementary color method of claim 1, wherein comparing the aging degree data with a pre-stored compensation ratio database to determine the compensation ratio corresponding to the aging degree data comprises:
comparing the aging degree data with the compensation proportion database, and determining a compensation gradient corresponding to the aging data; wherein the compensation proportion database comprises a plurality of compensation gradients, and each compensation gradient corresponds to one compensation proportion;
and determining a compensation proportion corresponding to the compensation gradient according to the determined compensation gradient.
4. The white point complementary color method of any one of claims 1 to 3, wherein the compensation ratio is the ratio of the luminance of the red, blue and white pixels when the white color point coordinate of the WOLED device is the same as the target white point coordinate.
5. A white point complementary color device of a WOLED device is characterized by comprising: the device comprises a detection module, a determination module and a compensation module; wherein,
the detection module is used for detecting the aging degree of the WOLED device and determining the aging degree data of the WOLED device;
the determining module is used for comparing the aging degree data with a pre-stored compensation proportion database and determining the compensation proportion corresponding to the aging degree data;
the compensation module is used for compensating the WOLED device according to the determined compensation proportion.
6. The white point complementary color device of claim 5, wherein the detection module is specifically configured to:
carrying out aging detection on the current WOLED device under the drive of a preset drive current to obtain color coordinates of each color pixel of the WOLED device; wherein the WOLED device comprises pixels of four colors of red, green, blue and white;
and determining the aging degree data of the WOLED device at present according to the acquired color coordinates of the pixels of each color.
7. The white point complementary color apparatus of claim 5, wherein the determining module is specifically configured to:
comparing the aging degree data with the compensation proportion database, and determining a compensation gradient corresponding to the aging data; wherein the compensation proportion database comprises a plurality of compensation gradients, and each compensation gradient corresponds to one compensation proportion;
and determining a compensation proportion corresponding to the compensation gradient according to the determined compensation gradient.
8. The white point complementary color device of any one of claims 5-7, wherein the compensation ratio is the ratio of the luminance of the red, blue and white pixels when the white color point coordinate of the WOLED device is the same as the target white point coordinate.
9. A display apparatus comprising a white point complementary color apparatus of the WOLED device of any one of claims 5 to 8.
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| CN107680544A (en) * | 2017-09-14 | 2018-02-09 | 维沃移动通信有限公司 | A kind of colour temperature calibration method and mobile terminal |
| CN109948184A (en) * | 2019-02-01 | 2019-06-28 | 东莞广亮山贸易有限公司 | Illuminate light mixing calculation method, device, computer equipment and storage medium |
| CN110634444A (en) * | 2019-09-24 | 2019-12-31 | 昆山国显光电有限公司 | Compensation method of display panel |
| CN111354287A (en) * | 2018-12-20 | 2020-06-30 | 京东方科技集团股份有限公司 | Method, device and equipment for determining aging attenuation degree of pixel and compensating pixel |
| WO2022116291A1 (en) * | 2020-12-02 | 2022-06-09 | Tcl华星光电技术有限公司 | White balance adjustment method and liquid crystal display |
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Application publication date: 20170811 |