CN110767150A - Method for solving squint color cast problem of LED screen - Google Patents
Method for solving squint color cast problem of LED screen Download PDFInfo
- Publication number
- CN110767150A CN110767150A CN201910994691.4A CN201910994691A CN110767150A CN 110767150 A CN110767150 A CN 110767150A CN 201910994691 A CN201910994691 A CN 201910994691A CN 110767150 A CN110767150 A CN 110767150A
- Authority
- CN
- China
- Prior art keywords
- angle
- color cast
- value
- screen
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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]
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
The invention relates to the field of screen tuning methods, in particular to a method for solving the problem of squint color cast of an LED screen.
Description
Technical Field
The invention relates to the field of screen tuning and teaching methods, in particular to a method for solving the problem of squint color cast of an LED screen.
Background
The LED is a display mode by controlling a semiconductor light emitting diode, and it is roughly like a plurality of small lamps, usually red, green, and blue, which display characters by turning on and off the lamps. A display screen for displaying various information such as characters, figures, images, animation, quotation, video, and video signals. And the LED screen can mix different colors by controlling the brightness of the three-color small lamps.
Because the LED screen is composed of a plurality of pixel points, the pixel points can realize self-luminescence, the brightness of a three-color small lamp entering eyeballs can be reduced to a certain degree when the LED screen is obliquely viewed, and the microcosmic reduction of the brightness of three primary colors is a color cast phenomenon in the eyeballs. Especially, the color cast phenomenon is easy to occur on the curved surface part of the existing curved surface display screen adopting the LED display technology.
Disclosure of Invention
In view of the above, the present invention provides a method for solving the color cast problem of LED screen, which can make the screen display more accurate color according to different viewing angles.
Based on the purpose, the invention provides the following technical scheme:
the invention discloses a method for solving the problem of squint color cast of an LED screen, which comprises the following steps:
(1) (ii) outputting, by a computer, a pure color picture to a screen in front view, obtaining an angular-color shift correspondence table in which the RGB values (L (R) ("G) (" B)) at the point in time are taken as a reference value, (2) maintaining a pure color picture of the screen and taking a color shift gradation displayed on the screen at a different observation angle α and establishing a color shift gradation and an observation angle, (3) inputting, by a computer, different RGB values to the screen in accordance with the angular-color shift correspondence table so that the screen presents the pure color picture at the corresponding observation angle α and taking corresponding RGB values (L (R) ("L.) (L) (" B ") as a reference value, (4) bringing the reference values (L (R) (" L) ("G) (" L) (B) ("B)) into the color shift-angle correspondence table, marking the corresponding RGB values when the pure color picture is desired to be obtained at a different observation angle α, obtaining an angular-value correspondence table, and taking the angular-color shift correspondence table and taking the corresponding RGB values (Z) ((R) ((48) as a color shift correspondence table) and taking the angular-L" ((α) a color shift correspondence table and taking the angular-L "((48) as a shift correspondence table and taking a color shift ratio of the viewing angle (Z) and taking the pure color shift compensation value, and taking the screen as a shift value, and taking the angular value (K) as a reference value, and taking a shift value, and taking the value (K) compensation value (K) as a value, and taking a value of the deviation ratio of the deviation value of the pure color shift value, and taking the screen (L) (7) to the deviation ratio of the deviation value, and taking the screen at the deviation value of the viewing angle (" R "((7) of the deviation value of the viewing angle (" L) (α), and taking the pure color shift value of the screen, and taking the deviation value of the color shift compensation.
Further, the values of P (R), P (G), P (B), L (R), ', L (G),', L (B), ', L (R),', L (G), ', and L (B)' are between 0 and 255.
Further, when the xL (R) ' yL (G) ' zL (B) ' is greater than 255, 255 is directly taken out.
Furthermore, the values of x, y and z in the color cast compensation proportion x, y and z are all larger than 1.
Further, the viewing angle α ranges from 0 ° < α < 90 °.
Further, the longitudinal axis in the angle-color cast corresponding relation table, the angle-comparison value corresponding relation table and the angle-compensation corresponding relation table is an angle, and sampling is performed once every 5 degrees; the horizontal axis is the color gradation, RGB value and color cast compensation ratio corresponding to the angle.
The invention has the beneficial effects that: according to the method for solving the problem of the squint color cast of the LED screen, as described above, the compensation proportion of the LED screen at different observation angles is calculated by collecting the RGB value and the front-view reference value when the LED screen is correctly displayed at different observation angles, so that the light of the weakened part of the three primary colors of the LED screen at the time of squint is compensated, and the LED screen can display more accurate colors at different observation angles.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a schematic view of a curved screen according to the present invention;
FIG. 3 is a table showing the correspondence between the observation angle, the color cast, the contrast value and the compensation ratio according to the present invention;
Detailed Description
A method of solving the problem of color cast in a squint view of an LED screen, as shown in FIG. 1, includes the steps of (1) outputting, by a computer, a pure color picture to a screen in a plus view, obtaining RGB values (L (R) ((G) () L (B)) as a reference value, (2) maintaining the pure color picture of the screen and taking a color cast level displayed on the screen at a different observation angle α and establishing an angular color cast correspondence table for the color cast level and the observation angle, (3) inputting, by a computer, different RGB values to the screen such that the screen presents a pure color picture at the corresponding observation angle α and extracts corresponding (L (R) ((G) ((B) ((3) as a reference value, and (4) taking the reference value (L) (R) ("L) (G) ((B) ((S) ()" G) ((S))) L) ((S))) as a reference value), and) and taking a value) as a reference value), and taking a value) as a value), and taking the corresponding value), and taking the value as a contrast ratio of the pure color cast value), and taking the value (R) ((S) (26) as a contrast ratio) (26), and taking the value) as the value), and taking the value) as the value), and taking the value), when the value, the value of the value, the value) as the value, the value of the value, the deviation angle (R) ((S) as.
In this embodiment, the problem of color cast of the curved screen edge in the front view is solved, please refer to fig. 2, in which the curved screen edge has an arc-shaped surface, and the cross section of the arc-shaped surface is an arc edge, taking an arc edge of 90 degrees as an example. Firstly, dividing the arc edge into 18 partitions every 5 degrees, and taking the front-view screen plane as a reference angle, respectively: AB (0 DEG to 5 DEG), BC (5 DEG to 10 DEG), CD (10 DEG to 15 DEG), DE (15 DEG to 20 DEG), EF (20 DEG to 25 DEG), FG (25 DEG to 30 DEG), GH (30 DEG to 35 DEG), HI (35 DEG to 40 DEG), IJ (40 DEG to 45 DEG), JK (45 DEG to 50 DEG), KL (50 DEG to 55 DEG), LM (55 DEG to 60 DEG), MN (60 DEG to 65 DEG), NO (65 DEG to 70 DEG), OP (70 DEG to 75 DEG), PQ (75 DEG to 80 DEG), QR (80 DEG to 85 DEG) and RS (85 DEG to 90 DEG), the LED screen in this embodiment employs a Pentile pixel arrangement whose curved screen exhibits a significant greenish phenomenon at the edge in front view and the greenish degree is higher the closer to the edge position the greater the curvature is, the degree of color cast of the previously divided 18 regions is also gradually increased.
Therefore, according to the steps of the present invention, a pure color picture is firstly output to the control computer to the screen, the RGB value of the point a is collected as a reference value, the RGB value of the point a is measured to be (100.100.100), the screen displays gray at the moment, but the edge appears greenish which can be obviously perceived from the screen after the included angle with the front view exceeds 15 degrees, and the degree of greenish increases with the increase of the degree of the included angle with the front view.
Maintaining the front view angle, adjusting the RGB values of the 18 divided regions so that the 18 regions are displayed as a pure color picture, and recording the RGB values at this time as comparison values, as shown in fig. 3, the comparison values of the 18 regions are divided by the reference value to obtain a compensation ratio.
Finally, by debugging the screen by a computer, the compensation proportion of the corresponding region is brought into the RGB value of the region, for example, the RGB value of the AB region of the curved screen in the present embodiment can be approximately regarded as the reference value (l (r) 'l (g)' l (b) '), at which time the compensation proportion of the RS region is brought into the RGB value of the RS region, which is (1.41l (r)' l (g) '1.5 l (b)'), and the case of correcting the bias green by lowering the brightness of the other two primary colors at the time of displaying the other colors is reached in the orthographic view.
In this embodiment, when the xl (r) ' yl (g) ' zl (b) ' is greater than 255, 255 is directly extracted. Therefore, when pure white is displayed, compensation cannot be carried out, color cast can still occur in the display, but when most of color levels are displayed, the method for solving the problem of the squint color cast of the LED screen can effectively correct the color cast.
According to the invention, the compensation proportion of the LED screen under different observation angles is calculated by collecting the RGB value and the front-view reference value when the LED screen is correctly displayed under different observation angles, so that the light of the weakened part of the three primary colors of the LED screen under oblique view is compensated, and the LED screen can display more accurate colors under different observation angles.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (6)
1. A method for solving the problem of squint color cast of an LED screen is characterized in that: the method comprises the following steps:
outputting a pure color picture to a front-view screen through a computer, and obtaining RGB values (L (R), L (G), L (B)) in pixel points at the moment as reference values;
maintaining a pure color picture of the screen, collecting color cast gradations displayed on the screen under different observation angles α, and establishing an angle-color cast corresponding relation table of the color cast gradations and the observation angles;
according to the angle-color cast correspondence table, and inputting different RGB values to the screen by the computer so that the screen takes a pure color picture at the corresponding observation angle α and extracts, as a control value, the corresponding RGB value (l (r) '.l (g) '.l (b) ');
bringing the reference value (l (r) ', l (g) ', l (b) ') into the color cast-angle correspondence table, marking RGB values corresponding to when the pure color picture is desired to be obtained at a different observation angle α, obtaining an angle-reference value correspondence table;
calculating a numerical proportion (l (r) '/l (r) ()) of a monochrome luminance numerical value (l (r)', l (g) ', l (b)') to the reference value (l (r) (). l (g) (). l) (b))) at the corresponding observation angle α while maintaining the screen-output pure color picture, based on the angle-to-reference-value correspondence table, and taking the proportion as a color cast compensation proportion x: y: z, and establishing an angle-to-compensation correspondence table of the color cast compensation proportion and the corresponding observation angle α;
collecting an RGB value (l (r) ', l (g) ', l (b) ') in the squint color shift region, and selecting the corresponding compensation ratio x: y: z in accordance with the angle-compensation correspondence table and the observation angle α, and compensating the value of the region (l (r) ', l (g) ', l (b) ') into (xl (r) ', yl (g) ', zl (b) ').
2. The method for solving the problem of the squint color cast of the LED screen as claimed in claim 1, wherein: the values of P (R), P (G), P (B), L (R), ', L (G),', L (B), ', L (R),', L (G), ', and L (B)' are between 0 and 255.
3. A method of solving the problem of squint color cast of LED screens according to any one of claim 1 or claim 2, wherein: when said xL (R) ', yL (G) ', zL (B) ' is greater than 255, 255 is directly taken out.
4. The method for solving the problem of the squint color cast of the LED screen as claimed in claim 1, wherein: and the values of x, y and z in the color cast compensation proportion x, y and z are all larger than 1.
5. The method for solving the problem of the squint color cast of the LED screen as claimed in claim 1, wherein the observation angle α is in the range of 0 ° < α < 90 °.
6. The method for solving the problem of the squint color cast of the LED screen as claimed in claim 1, wherein: the longitudinal axis in the angle-color cast corresponding relation table, the angle-comparison value corresponding relation table and the angle-compensation corresponding relation table is an angle, and sampling is carried out once every 5 degrees; the horizontal axis is the color gradation, RGB value and color cast compensation ratio corresponding to the angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910994691.4A CN110767150B (en) | 2019-10-18 | 2019-10-18 | Method for solving squint color cast problem of LED screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910994691.4A CN110767150B (en) | 2019-10-18 | 2019-10-18 | Method for solving squint color cast problem of LED screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110767150A true CN110767150A (en) | 2020-02-07 |
| CN110767150B CN110767150B (en) | 2020-11-20 |
Family
ID=69332411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910994691.4A Active CN110767150B (en) | 2019-10-18 | 2019-10-18 | Method for solving squint color cast problem of LED screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110767150B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023205960A1 (en) * | 2022-04-24 | 2023-11-02 | 西安诺瓦星云科技股份有限公司 | Display screen image processing method, apparatus and system, and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160191837A1 (en) * | 2014-12-29 | 2016-06-30 | Samsung Electronics Co., Ltd. | Display apparatus and display method |
| US20170092229A1 (en) * | 2010-09-30 | 2017-03-30 | Apple Inc. | Ambient Display Adaptation For Privacy Screens |
| CN108305579A (en) * | 2018-01-26 | 2018-07-20 | 昆山国显光电有限公司 | Screen adjustment method and display device |
| CN108399901A (en) * | 2018-02-28 | 2018-08-14 | 青岛海信电器股份有限公司 | Liquid crystal display color calibration method and device and electronic equipment |
| CN109300435A (en) * | 2018-11-06 | 2019-02-01 | 深圳天珑无线科技有限公司 | Flexible screen display methods and display equipment |
| CN109300434A (en) * | 2018-10-31 | 2019-02-01 | 上海天马微电子有限公司 | Display device and adjusting method of viewing angle chromatic aberration thereof |
| CN109461409A (en) * | 2018-10-31 | 2019-03-12 | 北京小米移动软件有限公司 | Screen display method and device |
-
2019
- 2019-10-18 CN CN201910994691.4A patent/CN110767150B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170092229A1 (en) * | 2010-09-30 | 2017-03-30 | Apple Inc. | Ambient Display Adaptation For Privacy Screens |
| US20160191837A1 (en) * | 2014-12-29 | 2016-06-30 | Samsung Electronics Co., Ltd. | Display apparatus and display method |
| CN108305579A (en) * | 2018-01-26 | 2018-07-20 | 昆山国显光电有限公司 | Screen adjustment method and display device |
| CN108399901A (en) * | 2018-02-28 | 2018-08-14 | 青岛海信电器股份有限公司 | Liquid crystal display color calibration method and device and electronic equipment |
| CN109300434A (en) * | 2018-10-31 | 2019-02-01 | 上海天马微电子有限公司 | Display device and adjusting method of viewing angle chromatic aberration thereof |
| CN109461409A (en) * | 2018-10-31 | 2019-03-12 | 北京小米移动软件有限公司 | Screen display method and device |
| CN109300435A (en) * | 2018-11-06 | 2019-02-01 | 深圳天珑无线科技有限公司 | Flexible screen display methods and display equipment |
Non-Patent Citations (2)
| Title |
|---|
| 丁柏秀 等: "《发光二极管显示屏CCD图像的修正》", 《光学精密工程》 * |
| 宋聪 等: "《ADS类面板色偏关键影响因素》", 《液晶与显示》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023205960A1 (en) * | 2022-04-24 | 2023-11-02 | 西安诺瓦星云科技股份有限公司 | Display screen image processing method, apparatus and system, and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110767150B (en) | 2020-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10373551B2 (en) | Display unit, image processing unit, and display method for improving image quality | |
| US8743152B2 (en) | Display apparatus, method of driving display apparatus, drive-use integrated circuit, driving method employed by drive-use integrated circuit, and signal processing method | |
| US7983506B2 (en) | Method, medium and system processing image signals | |
| US9378691B2 (en) | Display device and method for driving display device | |
| US10347198B2 (en) | Image displaying methods and display devices | |
| CN111968570A (en) | Display compensation information acquisition method, display compensation method and device | |
| JP5897159B2 (en) | Display device and control method thereof | |
| US11030971B2 (en) | Display device and image processing method for color correction based on image type | |
| CN109935219B (en) | Display method of spliced panel | |
| WO2016169021A1 (en) | Image display driving method, apparatus and device | |
| KR20180063611A (en) | Display device and image data processing method of the same | |
| US20200105225A1 (en) | Ambient Saturation Adaptation | |
| US20200118503A1 (en) | Driving Method of Display Device and Display Device | |
| CN106023927A (en) | Method of correcting Gamma voltages and white dots of replacement RGBW panel | |
| CN107742508B (en) | Driving method and driving device of display device | |
| CN114067724A (en) | Gray scale data processing method, device and system and display device | |
| CN110767150B (en) | Method for solving squint color cast problem of LED screen | |
| WO2022120799A1 (en) | Image processing method and apparatus, electronic device, and storage medium | |
| US8860746B2 (en) | Video display device | |
| KR101981269B1 (en) | Method for reducing burn-in in a display | |
| CN108898987A (en) | A kind of grayscale conversion method, gray level conversion device and display device | |
| TWI678097B (en) | Method and apparatus for performing display control of a display panel equipped with red, green, blue, and white sub-pixels | |
| KR20180052836A (en) | Display apparatus and driving method thereof | |
| JP2007324665A (en) | Image correction apparatus and video display apparatus | |
| KR102582156B1 (en) | Display Device and Method of Driving the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100085 1408, Building 29, yard 9, anningzhuang West Road, Haidian District, Beijing Patentee after: Beijing kaishida Technology Co.,Ltd. Address before: 100085 1408, Building 29, yard 9, anningzhuang West Road, Haidian District, Beijing Patentee before: BEIJING KYSTAR TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220526 Address after: 410000 room 1702, block a, building 14, Jinyue Yayuan phase II business, No. 268, Luyun Road, Tianding street, Yuelu District, Changsha City, Hunan Province Patentee after: Hunan bowan Technology Co.,Ltd. Address before: 100085 1408, Building 29, yard 9, anningzhuang West Road, Haidian District, Beijing Patentee before: Beijing kaishida Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |