CN111679483A - Method for adjusting color gamut of liquid crystal display panel - Google Patents
Method for adjusting color gamut of liquid crystal display panel Download PDFInfo
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- 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
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 9
- 241001270131 Agaricus moelleri Species 0.000 claims abstract description 17
- 230000003247 decreasing effect Effects 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 5
- 210000004027 cell Anatomy 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000002596 correlated effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL 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
- G02F1/00—Devices 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
- G02F1/01—Devices 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
- G02F1/13—Devices 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
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
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.
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| CN202010487890.9A CN111679483A (en) | 2020-06-02 | 2020-06-02 | Method for adjusting color gamut of liquid crystal display panel |
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