Display method of multi-primary color graphene display device

• US 10,410,588 B2
• Filed: 01/05/2017
• Issued: 09/10/2019
• Est. Priority Date: 11/01/2016
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Fan, Yong
• Primary Examiner(s): Patel, Nitin
• Assistant Examiner(s): Onyekaba, Amy
• Application Number:
  US15/328,518
• Publication Number:
  US 20180336833A1
• Time in Patent Office: 978 Days
• CPC Class Codes: G02B 1/115 Multilayers
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/34 by control of light from an independent source
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127

Abstract

Disclosed is a display method of a multi-primary color sphere display device. The method includes the steps of: dividing a pixel color gamut into color patches; determining a color patch to which a pixel chromaticity coordinate belongs; displaying through three dynamic sub-pixels according to the color patch to which the pixel chromaticity coordinate belongs; and determining output brightness of the dynamic sub-pixels by coordinates of a white point, coordinates of the dynamic sub-pixels, an output brightness value when gray level 255 in red is input, an output brightness value when gray level 255 in green is input, and an output brightness value when gray level 255 in blue is input respectively. When input gray level values of RGB three pixels are approximately the same, output brightness and white chromaticity are basically close to the same, guaranteeing the consistency of the chromaticity coordinates of the white point.

Claims

1. A display method of a multi-primary color graphene display device, wherein the method comprises the steps of:

dividing a pixel color gamut to form a plurality of different color patches;

determining, according to an input pixel chromaticity coordinate, a color patch to which the input pixel chromaticity coordinate belongs;

displaying through three dynamic sub-pixels according to the color patch to which the input pixel chromaticity coordinate belongs, each color patch of the plurality of different color patches corresponding to display colors of the three dynamic sub-pixels; and

determining output brightness of the three dynamic sub-pixels by coordinates of a white point, coordinates of the three dynamic sub-pixels, an output brightness value when gray level 255 in red is input, an output brightness value when gray level 255 in green is input, and an output brightness value when gray level 255 in blue is input;

a color point Y is an intersection point of an extension line of a connection line of a color point B and a color point W with a light-emitting color curve of graphene, and a color point C is an intersection point of an extension line of a connection line of a color point R and the color point W with a light-emitting color curve of graphene; and

wherein the pixel color gamut is divided into five triangular color patches of WBR, WCB, WGC, WYG, and WRY, and each of the triangular color patches has corresponding display colors of three dynamic sub-pixels;

when the dynamic sub-pixels are RGC or RCB, output brightness of the point R and that of the point C meet the following formula;

LRg(255)+LCg(255)=LRi(255)+LGi(255)+LBi(255) 

 

(1)

Xw=[(XRg×

LRg/YRg)+(XCg×

LCg/YCg)]/(LRg/YRg+LCg/YCg) 

 

(2)

Yw=(LRg+LCg)/(LRg/YRg+LCg/YCg) 

 

(3)

wherein Xw and Yw are horizontal and vertical coordinates of the point W respectively;

LRi (255), LGi (255), and LBi (255) are respectively an output brightness value when gray level 255 in red is input, an output brightness value when gray level 255 in green is input, and an output brightness value when gray level 255 in blue is input;

XRg and YRg are horizontal and vertical coordinates of the point R respectively;

XCg and YCg are horizontal and vertical coordinates of the point C respectively;

LCg (255) is a brightness value of gray level 255 output by the point C; and

LRg (255) represents a brightness value of gray level 255 output by the point R.

2. The method according to claim 1, wherein when the dynamic sub-pixels are RGC,

LGg(255)=a*LGi(255),

wherein LGg (255) is a brightness value of gray level 255 output by a point G, and 0.5<

a<

2.

3. The method according to claim 2, wherein 1<

a<

1.3.

4. The method according to claim 3, wherein a is 1.2.

5. The method according to claim 1, wherein when the dynamic sub-pixels are RCB,

LBg(255)=b*LBi(255),

wherein LBi (255) is a brightness value of gray level 255 output by the point B, and 0.5<

b<

2.

6. The method according to claim 5, wherein 1<

b<

1.3.

7. The method according to claim 6, wherein b=1.2.

8. The method according to claim 1, wherein Xw=0.31, Yw=0.325, LRg (255) is 29.3 nits, and LCg (255) is 70.7 nits.

9. A display method of a multi-primary color graphene display device, wherein the method comprises the steps of:

dividing a pixel color gamut to form a plurality of different color patches;

determining, according to an input pixel chromaticity coordinate, a color patch to which the input pixel chromaticity coordinate belongs;

displaying through three dynamic sub-pixels according to the color patch to which the input pixel chromaticity coordinate belongs, each color patch of the plurality of different color patches corresponding to display colors of the three dynamic sub-pixels; and

determining output brightness of the three dynamic sub-pixels by coordinates of a white point, coordinates of the three dynamic sub-pixels, an output brightness value when gray level 255 in red is input, an output brightness value when gray level 255 in green is input, and an output brightness value when gray level 255 in blue is input;

a color point Y is an intersection point of an extension line of a connection line of a color point B and a color point W with a light-emitting color curve of graphene, and a color point C is an intersection point of an extension line of a connection line of a color point R and the color point W with a light-emitting color curve of graphene; and

wherein the pixel color gamut is divided into five triangular color patches of WBR, WCB, WGC, WYG, and WRY, and each of the triangular color patches has corresponding display colors of three dynamic sub-pixels;

wherein when the dynamic sub-pixels are YGB or YRB, output brightness of the point Y and that of the point B meet the following formula;

LYg(255)+LBg(255)=LRi(255)+LGi(255)+LBi(255) 

 

(4)

Xw=[(XBg×

LBg/YBg)+(XYg×

LYg/YYg)]/(LBg/YBg+LYg/YYg) 

 

(5)

Yw=(LBg+LYg)/(LBg/YBg+LYg/YYg) 

 

(6)

wherein Xw and Yw are horizontal and vertical coordinates of the point W respectively;

LRi (255), LGi (255), and LBi (255) are respectively an output brightness value when gray level 255 in red is input, an output brightness value when gray level 255 in green is input, and an output brightness value when gray level 255 in blue is input;

XBg and YBg are horizontal and vertical coordinates of the point B respectively;

XYg and YYg are horizontal and vertical coordinates of the point Y respectively;

LYg (255) is a brightness value of gray level 255 output by the point Y; and

LBg (255) represents a brightness value of gray level 255 output by the point.

10. The method according to claim 9, wherein Xw=0.31, Yw=0.325, LBg (255) is 4.6 nits, and LYg (255) is 95.4 nits.