CN111477170B - Method for reducing gamma lines in OLED product by using multi-stage interpolation - Google Patents
Method for reducing gamma lines in OLED product by using multi-stage interpolation Download PDFInfo
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- CN111477170B CN111477170B CN202010256633.4A CN202010256633A CN111477170B CN 111477170 B CN111477170 B CN 111477170B CN 202010256633 A CN202010256633 A CN 202010256633A CN 111477170 B CN111477170 B CN 111477170B
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/90—Determination of colour characteristics
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/843—Demosaicing, e.g. interpolating colour pixel values
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
Abstract
The invention relates to a method for reducing gamma lines in an OLED product by using multi-stage interpolation, which comprises the following steps: setting a multi-stage interpolation area: the area with the gray value smaller than the first gray value is a non-interpolation area; the area with the gray value more than or equal to the first gray value and less than the second gray value is a 1-bit interpolation area; the area with the gray value more than or equal to the second gray value and less than the third gray value is a 2-bit interpolation area; the area with the gray value more than or equal to the third gray value and less than the fourth gray value is a 3-bit interpolation area; the number of gamma lines G of a single gamma voltage block in the OLED product is (first gray value) × 1+ (second gray value-first gray value)/2 + (third gray value-second gray value)/4 + (fourth gray value-third gray value)/8. By adopting a multi-stage interpolation method, the number of gamma lines can be reduced more remarkably, and finally, the area of an integrated circuit of a driving chip of an OLED product is greatly reduced.
Description
Technical Field
The invention relates to the technical field of OLED products, in particular to a method for reducing gamma lines in an OLED product by using multi-stage interpolation.
Background
The color of many mobile OLED products uses 24 bits (1670 ten thousand colors), and in addition the color representation capability increases from 24 bits to 32 bits (1000M colors). In the design of the driving chip of the OLED product, the number of bits of a color is closely related to the number of gamma lines.
To represent 24-bit (i.e., 16.7M) colors, each R, G, B needs to have 8-bit color numbers, the total color number (24-bit) ═ R color number (8-bit) X G color number (8-bit) X B color number (8-bit), and 256 (i.e., 2) corresponding to the 8-bit color number is needed8) And gamma lines.
As shown in fig. 1, the conventional OLED driving chip includes a channel amplifier, a decoder, a pixel data block, and a gamma voltage block. The 24-bit pixel data of the pixel data block is output to a decoder, the 256R/G/B gamma voltages of the gamma voltage block are output to the decoder, the decoder is output to the channel amplifier, and the selected gamma value is displayed as an output of the channel amplifier. Each R/G/B color is 8 bits, corresponding to 256 x 3 gamma lines. This is disadvantageous for the hardware area design of the driver chip, and requires a larger area chip.
As shown in FIG. 2, the existing method for reducing the gamma line in the OLED product adopts a one-stage interpolation method, and adds an interpolation register LSB [1:0], and the interpolation register LSB [1:0] is allocated to a channel amplifier to apply interpolation.
As shown in fig. 4, the X axis represents gray scale, the Y axis represents voltage, an interpolation region may be set in consideration of characteristics of a gamma voltage curve, a non-interpolation region is set smaller than the gray scale 32, a 2-bit interpolation region is set equal to or greater than the gray scale 32 and smaller than the gray scale 256, the gamma curve is stably changed, and the number G of total gamma lines is {32+ (256-32)/2 ═2}*3＝88*3。
The 24-bit pixel data of the pixel data block is output to a decoder, the 88R/G/B gamma voltage of the gamma voltage block is output to the decoder, the decoder is output to the channel amplifier, and the selected gamma value and the value of the interpolation register LSB [1:0] are combined and displayed as the output of the channel amplifier.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a method for reducing gamma lines in an OLED product by using multi-stage interpolation is provided, and the number of the gamma lines can be further reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for reducing gamma lines in an OLED product by using multi-stage interpolation, which adopts a multi-stage interpolation method to reduce the number of gamma lines, and the multi-stage interpolation method comprises the following steps: setting a multi-stage interpolation area: the area with the gray value smaller than the first gray value is a non-interpolation area; the area with the gray value more than or equal to the first gray value and less than the second gray value is a 1-bit interpolation area; the area with the gray value more than or equal to the second gray value and less than the third gray value is a 2-bit interpolation area; the area with the gray value more than or equal to the third gray value and less than the fourth gray value is a 3-bit interpolation area; the number of gamma lines G of a single gamma voltage block in the OLED product is (first gray value) × 1+ (second gray value-first gray value)/2 + (third gray value-second gray value)/4 + (fourth gray value-third gray value)/8.
Preferably, the first gray scale value is gray scale 8, the second gray scale value is gray scale 32, the third gray scale value is gray scale 48, and the fourth gray scale value is gray scale 256.
Preferably, the driving chip of the OLED product includes a pixel data block, a gamma voltage block, a decoder, a channel amplifier, and an interpolation register LSB [2:0], the pixel data of the pixel data block is output to the decoder, the gamma voltage of the gamma voltage block is output to the decoder, the decoder is output to the channel amplifier, and the interpolation register LSB [2:0] is allocated to the channel amplifier for interpolation.
The invention has the beneficial effects that: by adopting a multi-stage interpolation method, the number of gamma lines can be reduced more remarkably, and finally, the area of an integrated circuit of a driving chip of an OLED product is greatly reduced.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a driving chip of a conventional OLED product;
FIG. 2 is a schematic diagram of a driving chip of an OLED product using a one-level interpolation method;
FIG. 3 is a schematic diagram of a driving chip of an OLED product using a multi-stage interpolation method;
FIG. 4 is a schematic diagram of a gamma curve using a one-stage interpolation method;
FIG. 5 is a schematic diagram of a gamma curve using a multi-stage interpolation method;
Detailed Description
The invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The preferred embodiment of the present invention, as shown in fig. 3 and 5, is a method for reducing gamma lines in an OLED product using multi-stage interpolation, and a driving chip of the OLED product includes a pixel data block 101, a gamma voltage block 102, a decoder 103, a channel amplifier, and an interpolation register LSB [2:0 ].
In fig. 5, the X-axis represents gray scale, the Y-axis represents voltage, and considering the gamma curve characteristic of the OLED product, it is preferable that the first gray scale value is gray scale 8, the second gray scale value is gray scale 32, the third gray scale value is gray scale 48, and the fourth gray scale value is gray scale 256, that is, gray scale 0 to gray scale 7 are non-interpolation regions, and gray scale 8 to gray scale 31 are 1-bit interpolation regions. When the gamma curve changes steadily, the gray levels 32 to 47 are 2-bit interpolation regions. And 3-bit interpolation areas are formed from 48-255 gray levels, and a gamma curve is realized by adopting a 3-bit interpolation method.
The total gamma line number G ═ {8 × 1+ (32-8)/2+ (48-32)/2 ═ G ═ 8 } 2+2+(256-48)/23}*3＝50*3。
The 24-bit pixel data of the pixel data block is output to a decoder, the 50R/G/B gamma voltage of the gamma voltage block is output to the decoder, the decoder is output to the channel amplifier, and the selected gamma value and the value of the interpolation register LSB [2:0] are combined and displayed as the output of the channel amplifier. Interpolation registers LSB [2:0] are assigned to the channel amplifiers for interpolation, and the R/G/B gamma voltage can be reduced to 50 lines.
Therefore, the number of gamma lines can be reduced more remarkably by adopting a multi-stage interpolation method, and finally, the area of an integrated circuit of a driving chip of an OLED product is greatly reduced.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (2)
1. A method for reducing gamma lines in an OLED product using multi-stage interpolation, comprising: reducing the number of gamma lines by adopting a multi-stage interpolation method, wherein the multi-stage interpolation method comprises the following steps: setting a multi-stage interpolation area: the area with the gray value smaller than the first gray value is a non-interpolation area; the area with the gray value more than or equal to the first gray value and less than the second gray value is a 1-bit interpolation area; the area with the gray value more than or equal to the second gray value and less than the third gray value is a 2-bit interpolation area; the area with the gray value more than or equal to the third gray value and less than the fourth gray value is a 3-bit interpolation area; the number of gamma lines G of a single gamma voltage block in the OLED product is (first gray value) × 1+ (second gray value-first gray value)/2 + (third gray value-second gray value)/4 + (fourth gray value-third gray value)/8;
the driving chip of the OLED product comprises a pixel data block, a gamma voltage block, a decoder, a channel amplifier and an interpolation register LSB [2:0], wherein the pixel data of the pixel data block is output to the decoder, the gamma voltage of the gamma voltage block is output to the decoder, the decoder is output to the channel amplifier, and the interpolation register LSB [2:0] is distributed to the channel amplifier for interpolation.
2. The method of reducing gamma rays in an OLED product using multi-stage interpolation of claim 1, wherein: the first gray scale value is gray scale 8, the second gray scale value is gray scale 32, the third gray scale value is gray scale 48, and the fourth gray scale value is gray scale 256.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608780A (en) * | 2012-03-22 | 2012-07-25 | 北京国科世纪激光技术有限公司 | Gamma curve linearization adjustment method of liquid crystal spatial light modulator |
| CN103617780A (en) * | 2013-12-06 | 2014-03-05 | 北京航空航天大学 | AMOLED display screen drive circuit and nonlinear interpolation construction method thereof |
| CN105827898A (en) * | 2016-03-28 | 2016-08-03 | 深圳英飞拓科技股份有限公司 | Gama curve regulation method and device applied to camera |
| CN106531050A (en) * | 2016-12-27 | 2017-03-22 | 上海天马有机发光显示技术有限公司 | Method, device and system for gray scale compensation of display panel |
| CN106846273A (en) * | 2017-01-23 | 2017-06-13 | 上海兴芯微电子科技有限公司 | A kind of method and device of Gamma corrections |
| CN110827739A (en) * | 2018-08-14 | 2020-02-21 | 美格纳半导体有限公司 | Display device and driving method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8681082B2 (en) * | 2009-11-11 | 2014-03-25 | Sony Corporation | Display device and drive method therefor, and electronic unit |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608780A (en) * | 2012-03-22 | 2012-07-25 | 北京国科世纪激光技术有限公司 | Gamma curve linearization adjustment method of liquid crystal spatial light modulator |
| CN103617780A (en) * | 2013-12-06 | 2014-03-05 | 北京航空航天大学 | AMOLED display screen drive circuit and nonlinear interpolation construction method thereof |
| CN105827898A (en) * | 2016-03-28 | 2016-08-03 | 深圳英飞拓科技股份有限公司 | Gama curve regulation method and device applied to camera |
| CN106531050A (en) * | 2016-12-27 | 2017-03-22 | 上海天马有机发光显示技术有限公司 | Method, device and system for gray scale compensation of display panel |
| CN106846273A (en) * | 2017-01-23 | 2017-06-13 | 上海兴芯微电子科技有限公司 | A kind of method and device of Gamma corrections |
| CN110827739A (en) * | 2018-08-14 | 2020-02-21 | 美格纳半导体有限公司 | Display device and driving method thereof |
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Address after: 526070 Room 127, Building B, Zhaoqing Investment Development Co., Ltd., North Eight District, Guicheng New Town, Dinghu District, Zhaoqing City, Guangdong Province Applicant after: Guangdong Shenghe Microelectronics Co., Ltd Address before: 526070 Room 127, Building B, Zhaoqing Investment Development Co., Ltd., North Eight District, Guicheng New Town, Dinghu District, Zhaoqing City, Guangdong Province Applicant before: Guangdong Shenghe Technology Co.,Ltd. |
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Address after: 526000 room 5, 203, building C1, maker business center, Zhanqian Avenue, Zhaoqing New District, Dinghu District, Zhaoqing City, Guangdong Province Patentee after: Shenghe Microelectronics (Zhaoqing) Co.,Ltd. Address before: 526070 Room 127, Building B, Zhaoqing Investment Development Co., Ltd., North Eight District, Guicheng New Town, Dinghu District, Zhaoqing City, Guangdong Province Patentee before: Guangdong Shenghe Microelectronics Co., Ltd |