CN111679483A - Method for adjusting color gamut of liquid crystal display panel - Google Patents

Method for adjusting color gamut of liquid crystal display panel Download PDF

Info

Publication number
CN111679483A
CN111679483A CN202010487890.9A CN202010487890A CN111679483A CN 111679483 A CN111679483 A CN 111679483A CN 202010487890 A CN202010487890 A CN 202010487890A CN 111679483 A CN111679483 A CN 111679483A
Authority
CN
China
Prior art keywords
display panel
light
color gamut
gray scale
blue light
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.)
Pending
Application number
CN202010487890.9A
Other languages
Chinese (zh)
Inventor
海博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
TCL Huaxing Photoelectric Technology Co Ltd
Original Assignee
TCL Huaxing Photoelectric Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TCL Huaxing Photoelectric Technology Co Ltd filed Critical TCL Huaxing Photoelectric Technology Co Ltd
Priority to CN202010487890.9A priority Critical patent/CN111679483A/en
Publication of CN111679483A publication Critical patent/CN111679483A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509Filters, e.g. light shielding masks
    • G02F1/133514Colour filters

Abstract

A method for adjusting color gamut of a display panel includes the following steps: s1: respectively adjusting the gray scales of the red light, the green light and the blue light in the display panel, and recording the color coordinates of the red light, the green light and the blue light with different gray scales on the color gamut map to obtain the relationship between the gray scales of the red light, the green light and the blue light and the color coordinates of the gray scales on the color gamut map; s2: and adjusting the gray scale of the red light, the green light or the blue light in the display panel according to the relationship between the gray scale of the red light, the green light and the blue light and the color coordinates of the red light, the green light and the blue light on the color gamut map so as to adjust the display panel to a preset color gamut. When the display panel is a multi-domain vertical alignment liquid crystal display (VA LCD), the step S2 is: the gray scale of the blue light in the display panel is reduced to increase the color gamut of the display panel.

Description

Method for adjusting color gamut of liquid crystal display panel
Technical Field
The present invention relates to the field of display panel technology, and more particularly, to a method for adjusting color gamut of a display panel.
Background
Color gamut is an important parameter for evaluating the quality of a display panel, and represents a range region formed by the number of colors that can be displayed by a display device, and common color gamut representation methods include color gamuts such as NTSC, SRGB and DCI-P3.
The color gamut of a liquid crystal display panel is required to be different for different customers, and the conventional method for improving the color gamut is to increase the thickness of a Color Filter (CF), however, the above method will require to change the manufacturing process of a liquid crystal cell (cell), and for panel manufacturers, both the increase of the CF thickness and the change of the cell manufacturing process will increase the production cost, so that there is an urgent need to develop a method for adjusting the color gamut of a display panel without changing the cell manufacturing process.
Disclosure of Invention
The present invention provides a method for adjusting color gamut of a display panel, which can adjust the color gamut of the display panel without changing the cell process, and meet the requirements of different customers, the method comprises the following steps:
s1: respectively adjusting the gray scales of the red light, the green light and the blue light in the display panel, and recording the color coordinates of the red light, the green light and the blue light with different gray scales on the color gamut map to obtain the relationship between the gray scales of the red light, the green light and the blue light and the color coordinates of the gray scales on the color gamut map;
s2: and adjusting the gray scale of the red light, the green light or the blue light in the display panel according to the relationship between the gray scale of the red light, the green light and the blue light and the color coordinates of the red light, the green light and the blue light on the color gamut map so as to adjust the display panel to a preset color gamut.
In one embodiment of the present invention, the gray scale of the red light, the green light and the blue light is adjusted in a range of 0 to 255.
In an embodiment of the present invention, the step of adjusting the gray scales of the red light, the green light, and the blue light in the display panel in S1 is:
and inputting the value corresponding to the gray scale of the red light, the green light or the blue light to a white balance optical system in the display panel.
In an embodiment of the present invention, when the display panel is a multi-domain vertical alignment liquid crystal display (VA LCD), the step S2 is: the gray scale of the blue light in the display panel is reduced to increase the color gamut of the display panel.
In one embodiment of the present invention, when the gray scale of the red light of the display panel is turned down, the x coordinate of the red light of the display panel on the color gamut map is decreased.
In one embodiment of the invention, when the gray scale of the red light of the display panel is adjusted to be reduced, the y coordinate of the red light of the display panel on the color gamut map is reduced.
In one embodiment of the present invention, when the gray scale of the green light of the display panel is turned down, the x-coordinate of the green light of the display panel on the color gamut map is decreased.
In one embodiment of the present invention, when the gray scale of the green light of the display panel is turned down, the y coordinate of the green light of the display panel on the color gamut map is decreased.
In one embodiment of the invention, when the gray scale of the blue light of the display panel is reduced, the x coordinate of the blue light of the display panel on the color gamut map is unchanged.
In one embodiment of the invention, when the gray scale of the blue light of the display panel is reduced, the y coordinate of the blue light of the display panel on the color gamut map is reduced.
The method for adjusting the color gamut of the display panel can adjust the color gamut area of the display panel under the condition of not changing the cell process, can meet different requirements of different customers on the color gamut of the display panel by using a single cell process, and greatly reduces the production cost of the display panel because the cell process does not need to be changed for panel manufacturers.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
In the drawings, there is shown in the drawings,
FIG. 1 is a flowchart illustrating a method for adjusting a color gamut of a display panel according to the present invention.
Fig. 2 is a trend graph of red x coordinate and green y coordinate of the display panel in CIE 1931 color space with the change of the gray scale values of red light and green light by using the method for adjusting the color gamut of the display panel according to the embodiment of the invention.
Fig. 3 is a trend graph of red y coordinate and green x coordinate of the display panel in CIE 1931 color space with the change of the gray scale values of red light and green light by using the method for adjusting the color gamut of the display panel according to the embodiment of the invention.
Fig. 4 is a trend graph of a change of a blue light x coordinate and a blue light y coordinate of the display panel in CIE 1931 color space with a gray scale value of the blue light using the method for adjusting the color gamut of the display panel according to the embodiment of the invention.
Fig. 5 is a schematic diagram of red, green and blue (x, y) coordinates of 255 gray levels of the display panel in CIE 1931 color space using the method for adjusting the color gamut of the display panel according to the embodiment of the invention.
Fig. 6 is a trend graph of the coverage of the color gamut area of the display panel on the NTSC surface with the gray scale value of the blue light by using the method for adjusting the color gamut of the display panel according to the embodiment of the invention.
Fig. 7 is a flowchart illustrating a step of adjusting a color gamut of a display panel when the display panel is a multi-domain vertical alignment liquid crystal display (VA LCD) panel according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 1, an embodiment of the invention provides a method for adjusting a color gamut of a display panel, which includes the following steps:
s1: and respectively adjusting the gray scales of the red light, the green light and the blue light in the display panel, and recording the color coordinates of the red light, the green light and the blue light with different gray scales on the color gamut map to obtain the relationship between the gray scales of the red light, the green light and the blue light and the color coordinates of the gray scales of the red light, the green light and the blue light on the color gamut map.
In this embodiment, the display panel using the method for adjusting the color gamut of the display panel is a multi-domain Vertical Alignment Liquid Crystal Display (VALCD), and it should be noted that the method provided in this embodiment is also applicable to a twisted nematic liquid crystal display (TN LCD), an in-plane switching (IPS) LCD, or other types of display panels.
In this embodiment, first, the gray scale values of the red light and the green light of the VA LCD are adjusted, please refer to fig. 2 and fig. 3, in which the horizontal axis is the gray scale value and the vertical axis is the color coordinate value, and it can be known from the figure that the red color coordinates (Rx, Ry) and the green color coordinates (Gx, Gy) of the VA LCD are positively correlated to the gray scale values of the red light and the green light, that is, the red color coordinates (Rx, Ry) and the green color coordinates (Gx, Gy) of the VA LCD increase with the increase of the gray scale values of the red light and the green light and decrease with the decrease of the gray scale values of the red light and the green light.
Then, the blue light gray scale value of the VA LCD is adjusted, please refer to fig. 4, in which the horizontal axis is the gray scale value and the vertical axis is the color coordinate value, it can be known from the figure that the blue light color coordinate (Bx) of the VA LCD does not change substantially with the change of the blue light gray scale value, and the blue light color coordinate (By) of the VA LCD is positively correlated with the blue light gray scale value, that is, the blue light color coordinate (By) of the VA LCD increases with the increase of the blue light gray scale value and also decreases with the decrease of the blue light gray scale value.
Therefore, referring to fig. 5, in the present embodiment, to increase the color gamut of the VA LCD, a user needs to decrease the gray scale value of the blue light to move the y coordinate of the blue light (point a) downward to increase the area of the triangular region surrounded by the line segments (Mod) (i.e., the color gamut area of the VALCD).
S2: and adjusting the gray scale of the red light, the green light or the blue light in the display panel according to the relationship between the gray scale of the red light, the green light and the blue light and the color coordinates of the red light, the green light and the blue light on the color gamut map so as to adjust the display panel to a preset color gamut.
The VA LCD includes a white balance optical system, and a user can directly input a preset gray scale value to the white balance optical system in the VALCD to adjust red, green, or blue light to a preset gray scale value, thereby increasing the color gamut of the VALCD, wherein the adjustable range of the gray scale value is 0-255.
Referring to fig. 6, the horizontal axis shows the adjustment range of the blue gray scale value of the VA LCD, the vertical axis shows the coverage of the color gamut area of the VA LCD on the NTSC area, the gray scale value of the blue light of the VA LCD is initially 255, and when the gray scale value of the blue light is adjusted to 235, the coverage of the color gamut area of the VA LCD on the NTSC area is increased from about 79.45% to about 80.25%, that is, the coverage of the color gamut area of the VA LCD on the NTSC area is increased as the gray scale value of the blue light is decreased, so that in this embodiment, it can be proved that decreasing the blue light gray scale value can increase the color gamut area of the VA LCD.
Therefore, through the above analysis, if the color gamut of the VA LCD product is to be increased, the present application finds that the color of the gray scale needs to be adjusted to blue by the white balance optical system. The direction of the blue gray scale is adjusted by reducing the display gray scale of blue in the white picture color combination. The reason is that the chromaticity coordinate (By) of blue can be reduced By reducing the display gray scale of blue, thereby increasing the color gamut area, please refer to fig. 7.
The method for adjusting the color gamut of the display panel can adjust the color gamut of the display panel without replacing the cell process, not only meets the requirements of different customers, but also greatly reduces the production cost of panel manufacturers, however, the method is not limited to be applied to the VA LCD mentioned in the embodiment, the influence of the gray scale value change of the red light, the green light and the blue light of different display panels on the color gamut area of the different display panels is possibly different, the relationship between the gray scale value change of the red light, the green light and the blue light of the display panel and the color coordinate change of the display panel on the color gamut diagram can be effectively measured by the method, and different users can obtain the color gamuts with different requirements after adjusting according to the relationship.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A method for adjusting color gamut of a display panel includes the following steps:
s1: respectively adjusting the gray scales of the red light, the green light and the blue light in the display panel, and recording the color coordinates of the red light, the green light and the blue light with different gray scales on the color gamut map to obtain the relationship between the gray scales of the red light, the green light and the blue light and the color coordinates of the gray scales on the color gamut map;
s2: and adjusting the gray scale of the red light, the green light or the blue light in the display panel according to the relationship between the gray scale of the red light, the green light and the blue light and the color coordinates of the red light, the green light and the blue light on the color gamut map so as to adjust the display panel to a preset color gamut.
2. The method as claimed in claim 1, wherein the gray scale of the red, green and blue lights is adjusted in a range of 0-255.
3. The method of claim 2, wherein the step of adjusting the gray scale of the red light, the green light and the blue light in the display panel in S1 is:
and inputting the value corresponding to the gray scale of the red light, the green light or the blue light to a white balance optical system in the display panel.
4. The method of claim 1, wherein when the display panel is a multi-domain Vertical Alignment Liquid Crystal Display (VALCD), the step S2 is: the gray scale of the blue light in the display panel is reduced to increase the color gamut of the display panel.
5. The method as claimed in claim 1, wherein when the gray scale of the red light of the display panel is decreased, the x-coordinate of the red light of the display panel on the color gamut map is decreased.
6. The method as claimed in claim 1, wherein when the gray scale of the red light of the display panel is decreased, the y coordinate of the red light of the display panel on the color gamut map is decreased.
7. The method as claimed in claim 1, wherein when the gray scale of the green light of the display panel is decreased, the x-coordinate of the green light of the display panel on the color gamut map is decreased.
8. The method as claimed in claim 1, wherein when the gray scale of the green light of the display panel is decreased, the y coordinate of the green light of the display panel on the color gamut map is decreased.
9. The method as claimed in claim 1, wherein when the gray scale of the blue light of the display panel is reduced, the x coordinate of the blue light of the display panel on the color gamut map is unchanged.
10. The method as claimed in claim 1, wherein when the gray scale of the blue light of the display panel is decreased, the y coordinate of the blue light of the display panel on the color gamut map is decreased.
CN202010487890.9A 2020-06-02 2020-06-02 Method for adjusting color gamut of liquid crystal display panel Pending CN111679483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010487890.9A CN111679483A (en) 2020-06-02 2020-06-02 Method for adjusting color gamut of liquid crystal display panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010487890.9A CN111679483A (en) 2020-06-02 2020-06-02 Method for adjusting color gamut of liquid crystal display panel

Publications (1)

Publication Number Publication Date
CN111679483A true CN111679483A (en) 2020-09-18

Family

ID=72434654

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010487890.9A Pending CN111679483A (en) 2020-06-02 2020-06-02 Method for adjusting color gamut of liquid crystal display panel

Country Status (1)

Country Link
CN (1) CN111679483A (en)

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030038058A (en) * 2001-11-08 2003-05-16 한국전자통신연구원 Method and apparatus for extending gamut of color devices
KR100719930B1 (en) * 2005-11-24 2007-05-18 비오이 하이디스 테크놀로지 주식회사 Color coordinates control method for liquid crystal display
CN101587695A (en) * 2009-04-09 2009-11-25 深圳华映显示科技有限公司 Image processing method capable of reducing color deviation
CN102044230A (en) * 2010-12-31 2011-05-04 昆山龙腾光电有限公司 Liquid crystal display device, color gamut conversion method thereof and color gamut conversion circuit
CN103747223A (en) * 2014-01-15 2014-04-23 京东方科技集团股份有限公司 Color gamut adjusting device, color gamut adjusting method and display system
CN104299585A (en) * 2014-10-14 2015-01-21 京东方科技集团股份有限公司 Method for improving color errors, color error adjustment structure and display device
CN105741815A (en) * 2016-04-01 2016-07-06 广东欧珀移动通信有限公司 Color gamut adjusting method and device of display screen
CN106409251A (en) * 2016-09-06 2017-02-15 武汉华星光电技术有限公司 Display panel brightness and chroma adjustment and calculation method and system
WO2017062314A1 (en) * 2015-10-09 2017-04-13 Intematix Corporation Narrow band red phosphor
CN106816143A (en) * 2016-12-30 2017-06-09 上海天马有机发光显示技术有限公司 Display panel gamut conversion method, device, system, display panel and display device
CN107742507A (en) * 2017-10-31 2018-02-27 武汉华星光电技术有限公司 Improve the method and system of display color gamut
CN108063935A (en) * 2018-01-05 2018-05-22 京东方科技集团股份有限公司 White balance adjusting method and system, the display device of display screen
CN207992627U (en) * 2017-11-01 2018-10-19 惠州市华星光电技术有限公司 Liquid crystal display
CN110322857A (en) * 2019-07-05 2019-10-11 青岛海信电器股份有限公司 Color compensation method and display equipment
CN110662022A (en) * 2019-09-29 2020-01-07 京东方科技集团股份有限公司 Color gamut adjusting system and color gamut adjusting method
CN110675797A (en) * 2019-09-25 2020-01-10 深圳Tcl数字技术有限公司 Color gamut mapping method, color gamut mapping assembly, display device and storage medium

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030038058A (en) * 2001-11-08 2003-05-16 한국전자통신연구원 Method and apparatus for extending gamut of color devices
KR100719930B1 (en) * 2005-11-24 2007-05-18 비오이 하이디스 테크놀로지 주식회사 Color coordinates control method for liquid crystal display
CN101587695A (en) * 2009-04-09 2009-11-25 深圳华映显示科技有限公司 Image processing method capable of reducing color deviation
CN102044230A (en) * 2010-12-31 2011-05-04 昆山龙腾光电有限公司 Liquid crystal display device, color gamut conversion method thereof and color gamut conversion circuit
CN103747223A (en) * 2014-01-15 2014-04-23 京东方科技集团股份有限公司 Color gamut adjusting device, color gamut adjusting method and display system
CN104299585A (en) * 2014-10-14 2015-01-21 京东方科技集团股份有限公司 Method for improving color errors, color error adjustment structure and display device
WO2017062314A1 (en) * 2015-10-09 2017-04-13 Intematix Corporation Narrow band red phosphor
CN105741815A (en) * 2016-04-01 2016-07-06 广东欧珀移动通信有限公司 Color gamut adjusting method and device of display screen
CN106409251A (en) * 2016-09-06 2017-02-15 武汉华星光电技术有限公司 Display panel brightness and chroma adjustment and calculation method and system
CN106816143A (en) * 2016-12-30 2017-06-09 上海天马有机发光显示技术有限公司 Display panel gamut conversion method, device, system, display panel and display device
CN107742507A (en) * 2017-10-31 2018-02-27 武汉华星光电技术有限公司 Improve the method and system of display color gamut
CN207992627U (en) * 2017-11-01 2018-10-19 惠州市华星光电技术有限公司 Liquid crystal display
CN108063935A (en) * 2018-01-05 2018-05-22 京东方科技集团股份有限公司 White balance adjusting method and system, the display device of display screen
CN110322857A (en) * 2019-07-05 2019-10-11 青岛海信电器股份有限公司 Color compensation method and display equipment
CN110675797A (en) * 2019-09-25 2020-01-10 深圳Tcl数字技术有限公司 Color gamut mapping method, color gamut mapping assembly, display device and storage medium
CN110662022A (en) * 2019-09-29 2020-01-07 京东方科技集团股份有限公司 Color gamut adjusting system and color gamut adjusting method

Similar Documents

Publication Publication Date Title
CN109147702B (en) Chromaticity adjusting method and device of display panel
US8698855B2 (en) White balance adjusting method
CN100557669C (en) Image quality control method and use the flat-panel monitor of this method
US20190221174A1 (en) Image processing method of display device, image processing structure, and display device
TWI388220B (en) Image processing method capable of reducing color shift
CN105259687A (en) Liquid crystal display screen picture consistency adjusting method and system
KR102350818B1 (en) Method and apparatus for detecting high-frequency components in an image
CN103106884A (en) Method and system for improving visual angle complexion color shift of liquid crystal display
WO2020103242A1 (en) Array substrate and display panel
WO2016052309A1 (en) Image processing device, display device, position determining device, position determining method, and recording medium
US20140218411A1 (en) Method and System for Improving a Color Shift of Viewing Angle of Skin Color of an LCD Screen
US11322103B2 (en) Driving method and driving device of display panel and display device
US10048061B2 (en) Measuring method and measuring system thereof
WO2018045676A1 (en) Method and system for adjusting and calculating brightness and chrominance of display panel
KR102008073B1 (en) Liquid crystal panel and pixel unit setting method thereof
CN103559866B (en) A kind of image display control method and device
WO2019119607A1 (en) Driving method and device for display device and a display device
WO2019119603A1 (en) Driving method and driving apparatus for display apparatus, and display apparatus
CN102542998B (en) Gamma correction method
WO2020259555A1 (en) Display brightness debugging method and device
CN110189717A (en) A kind of driving method of display module, drive system and display device
WO2010134247A1 (en) Liquid crystal display apparatus, liquid crystal display apparatus driving method, and television receiver
US20240013698A1 (en) Control method of display panel and display device
KR20050033297A (en) Apparatus and method for compensating gamma of video display device
CN112382247A (en) Display device and gamma curve adjusting method thereof

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