Primary color optimization method for multi-primary color display and display device

Abstract

The invention discloses a primary color optimization method for a multi-primary color display, which comprises the steps of firstly determining the primary color number, white spot color coordinates and white spot brightness of the display; then selecting a uniform color space (UCS) for gamut evaluation and a target gamut, giving the boundary of the target gamut in the uniform color space and thegamut volume, and selecting a value range which can be a continuous or discrete value range and an initial value of a color coordinate of each primary color light source; then calculating the shape ofa display gamut accomplished by the primary color coordinate combination in the selected uniform color space, normalizing the white spot brightness of the display gamut to the white spot of the target gamut, and calculating the volume of an intersection area of the display gamut and the target gamut; and setting a reasonable stopping condition through maximizing the volume of the intersection area or the ratio of the volume of the intersection area and the volume of the target gamut, and obtaining the optimized primary color coordinates and the brightness. The invention further discloses multi-primary color display device.

Description

technical field

[0001] The invention belongs to the field of display chromaticity, in particular to a primary color optimization method suitable for multi-primary color display and a display device realized by the method. Background technique

[0002] With the development of display technology, displays can achieve larger and larger color gamuts, and people's demand for displays with large color gamuts is also becoming more and more urgent. The current common display color gamut standard is sRGB, but this standard only covers a small part of the colors in the chromaticity diagram. The current NTSC color gamut, which is the target of display color gamut evaluation, can only cover less than half of the area of ​​the chromaticity diagram. The current display standard with the largest color gamut area is the Rec.2020 standard, but it can only cover 73.8% of the area of ​​the xy chromaticity diagram. Moreover, most of the current displays cannot meet this color gamut size stand...

Examples

Embodiment 1

[0082] For the method of optimizing the base color of high-brightness six-primary-color laser projection display, the process is as follows:

[0083] (1) Determine that the primary color number of the display is 6, the white point color coordinate is D65 standard light source, and the display brightness is 20000lm;

[0084] (2) Select the uniform color space (UCS) for color gamut evaluation as CIELAB uniform color space, and select the target color gamut as optimal color gamut;

[0085] (3) The value range of the wavelength of each primary color laser light source is 380-780nm in the visible light band, and the initial value is 380nm;

[0086] (4) Normalize the brightness of the white point of the display color gamut to L*=100 in the CIELAB space, and select the optimal color gamut with a white point of D65 and a maximum brightness of L*=100 for the target color gamut. Divide the polygon formed by the display color gamut and the target color gamut into 100 pieces equally divi...

Embodiment 2

[0091] The realized four primary color LED display primary color optimization method, its process is as follows:

[0092] (1) Determine that the primary color number of the display is 4, the white point color coordinate is D65 standard light source, and the display brightness is 2000lm;

[0093] (2) Select the uniform color space (UCS) for color gamut evaluation as the CIELUV uniform color space, select the target color gamut as Pointer’s gamut, and convert the target color gamut white point to D65;

[0094] (3) The spectrum of each primary color LED light source is approximately a Gaussian distribution with a full width at half maximum of 50nm, the value range of the central wavelength is 380-780nm in the visible light band, and the initial values ​​are 420nm, 480nm, 550nm and 650nm respectively;

[0095] (4) In the CIELUV space, the white point brightness of the display color gamut is normalized to L*=100, and the target color gamut is selected as a Pointer's gamut with a wh...

Embodiment 3

[0100] The realized five primary color quantum dot backlight LCD (QD-LCD) display primary color optimization method, its process is as follows:

[0101] (1) Determine that the primary color number of the display is 5, the white point color coordinate is D65 standard light source, and the display brightness is 1000lm;

[0102] (2) Select the uniform color space (UCS) for color gamut evaluation as CAM02-UCS uniform color space, and select the target color gamut to convert the white point into Pointer’s gamut of D65 light source;

[0103] (3) The spectrum of each primary color light source displayed on the LCD is approximately a Gaussian distribution with a full width at half maximum of 30nm. The value range of the central wavelength is 380-780nm in the visible light band, and the initial values ​​are 380nm, 480nm, 580nm, 680nm, and 780nm;

[0104] (4) In CAM02-UCS Ja c b c In the space, the brightness of the white point of the display color gamut is normalized to J=100, and th...

technical field

[0001] The invention belongs to the field of display chromaticity, in particular to a primary color optimization method suitable for multi-primary color display and a display device realized by the method. Background technique

[0002] With the development of display technology, displays can achieve larger and larger color gamuts, and people's demand for displays with large color gamuts is also becoming more and more urgent. The current common display color gamut standard is sRGB, but this standard only covers a small part of the colors in the chromaticity diagram. The current NTSC color gamut, which is the target of display color gamut evaluation, can only cover less than half of the area of ​​the chromaticity diagram. The current display standard with the largest color gamut area is the Rec.2020 standard, but it can only cover 73.8% of the area of ​​the xy chromaticity diagram. Moreover, most of the current displays cannot meet this color gamut size stand...

Examples

Embodiment 1

[0082] For the method of optimizing the base color of high-brightness six-primary-color laser projection display, the process is as follows:

[0083] (1) Determine that the primary color number of the display is 6, the white point color coordinate is D65 standard light source, and the display brightness is 20000lm;

[0084] (2) Select the uniform color space (UCS) for color gamut evaluation as CIELAB uniform color space, and select the target color gamut as optimal color gamut;

[0085] (3) The value range of the wavelength of each primary color laser light source is 380-780nm in the visible light band, and the initial value is 380nm;

[0086] (4) Normalize the brightness of the white point of the display color gamut to L*=100 in the CIELAB space, and select the optimal color gamut with a white point of D65 and a maximum brightness of L*=100 for the target color gamut. Divide the polygon formed by the display color gamut and the target color gamut into 100 pieces equally divi...

Embodiment 2

[0091] The realized four primary color LED display primary color optimization method, its process is as follows:

[0092] (1) Determine that the primary color number of the display is 4, the white point color coordinate is D65 standard light source, and the display brightness is 2000lm;

[0093] (2) Select the uniform color space (UCS) for color gamut evaluation as the CIELUV uniform color space, select the target color gamut as Pointer’s gamut, and convert the target color gamut white point to D65;

[0094] (3) The spectrum of each primary color LED light source is approximately a Gaussian distribution with a full width at half maximum of 50nm, the value range of the central wavelength is 380-780nm in the visible light band, and the initial values ​​are 420nm, 480nm, 550nm and 650nm respectively;

[0095] (4) In the CIELUV space, the white point brightness of the display color gamut is normalized to L*=100, and the target color gamut is selected as a Pointer's gamut with a wh...

Embodiment 3

[0100] The realized five primary color quantum dot backlight LCD (QD-LCD) display primary color optimization method, its process is as follows:

[0101] (1) Determine that the primary color number of the display is 5, the white point color coordinate is D65 standard light source, and the display brightness is 1000lm;

[0102] (2) Select the uniform color space (UCS) for color gamut evaluation as CAM02-UCS uniform color space, and select the target color gamut to convert the white point into Pointer’s gamut of D65 light source;

[0103] (3) The spectrum of each primary color light source displayed on the LCD is approximately a Gaussian distribution with a full width at half maximum of 30nm. The value range of the central wavelength is 380-780nm in the visible light band, and the initial values ​​are 380nm, 480nm, 580nm, 680nm, and 780nm;

[0104] (4) In CAM02-UCS Ja c b c In the space, the brightness of the white point of the display color gamut is normalized to J=100, and th...

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