Display device and color conversion method
First Claim
Patent Images
1. A display device comprising:
- an image display unit including a plurality of pixels including a first pixel, a second pixel arrayed next to the first pixel, and a third pixel arrayed next to the first pixel, the first pixel interposed between the second pixel and the third pixel, each of the plurality of pixels including;
a first sub-pixel for displaying a red component according to an amount of lighting of a self-emitting element;
a second sub-pixel for displaying a green component according to an amount of lighting of a self-emitting element;
a third sub-pixel for displaying a blue component according to an amount of lighting of a self-emitting element; and
a fourth sub-pixel for displaying an additional color component different from the respective components of the first sub-pixel, the second sub-pixel, and the third sub-pixel according to an amount of lighting of a self-emitting element, and having a higher luminance or a higher power efficiency to display the additional color component as compared to representation with the first sub-pixel, the second sub-pixel, and the third sub-pixel;
a conversion processing unit configured to;
receive a first input signal including first color information on the red component, the green component, and the blue component for display at a predetermined pixel of the plurality of pixels and is obtained based on an input video signal,perform a smoothing process including a calculation to obtain a sum R(n′
) of red component information R(n), which is multiplied by a predetermined weight of (a−
2)/a and contained in a piece of the first color information used for display at the first pixel, red component information R(n−
1), which is multiplied by a predetermined weight of 1/a and contained in a piece of the first color information used for display at the second pixel, and red component information R(n+1), which is multiplied by the predetermined weight of 1/a and contained in a piece of the first color information used for display at the third pixel, the calculation being expressed as R(n′
)=1/a×
R(n−
1)+((a−
2)/a)×
R(n)+1/a×
R(n+1) where n and a are natural numbers excluding zero, to replace the piece of the first color information used for display at the first pixel with the sum R(n′
),convert a saturation of the first color information into a saturation of second color information on the red component, the green component, and the blue component, in which the saturation of the first color information is reduced by an amount of saturation attenuation defined such that saturation variation falls within a predetermined range according to the first color information,output a second input signal including the second color information; and
a fourth sub-pixel signal processing unit configured to output, to a drive circuit that drives the image display unit, a third input signal including third color information on the red component, the green component, the blue component, and the additional color component that are converted based on the second color information in the second input signal,wherein the conversion processing unit converts the saturation of the first color information into the saturation of the second color information such that a color having the saturation of the second color information is shifted toward a color with a greater amount of the additional color component as compared to a color having the saturation of the first color information, andthe conversion processing unit performs a calculation to reduce a saturation such that a luminance of the first color information and a luminance of the second color information remain substantially equal to each other.
1 Assignment
0 Petitions
Accused Products
Abstract
The display device includes an image display unit including a plurality of pixels each including first to third sub-pixels and a fourth sub-pixel for displaying an additional color component according to an amount of lighting of a self-emitting element; a conversion processing unit that receives a first input signal including first color information for display at a predetermined pixel, where the first input signal is obtained based on an input video signal, the conversion processing unit being configured to outputs a second input signal including second color information with a saturation reduced by an amount of saturation attenuation defined such that saturation variation falls within a predetermined range according to the first color information; and a fourth sub-pixel signal processing unit that outputs, to the image display unit, a third input signal including third color information with red, green, blue components and the additional color component that are converted based on the second color information.
-
Citations
10 Claims
-
1. A display device comprising:
-
an image display unit including a plurality of pixels including a first pixel, a second pixel arrayed next to the first pixel, and a third pixel arrayed next to the first pixel, the first pixel interposed between the second pixel and the third pixel, each of the plurality of pixels including; a first sub-pixel for displaying a red component according to an amount of lighting of a self-emitting element; a second sub-pixel for displaying a green component according to an amount of lighting of a self-emitting element; a third sub-pixel for displaying a blue component according to an amount of lighting of a self-emitting element; and a fourth sub-pixel for displaying an additional color component different from the respective components of the first sub-pixel, the second sub-pixel, and the third sub-pixel according to an amount of lighting of a self-emitting element, and having a higher luminance or a higher power efficiency to display the additional color component as compared to representation with the first sub-pixel, the second sub-pixel, and the third sub-pixel; a conversion processing unit configured to; receive a first input signal including first color information on the red component, the green component, and the blue component for display at a predetermined pixel of the plurality of pixels and is obtained based on an input video signal, perform a smoothing process including a calculation to obtain a sum R(n′
) of red component information R(n), which is multiplied by a predetermined weight of (a−
2)/a and contained in a piece of the first color information used for display at the first pixel, red component information R(n−
1), which is multiplied by a predetermined weight of 1/a and contained in a piece of the first color information used for display at the second pixel, and red component information R(n+1), which is multiplied by the predetermined weight of 1/a and contained in a piece of the first color information used for display at the third pixel, the calculation being expressed as R(n′
)=1/a×
R(n−
1)+((a−
2)/a)×
R(n)+1/a×
R(n+1) where n and a are natural numbers excluding zero, to replace the piece of the first color information used for display at the first pixel with the sum R(n′
),convert a saturation of the first color information into a saturation of second color information on the red component, the green component, and the blue component, in which the saturation of the first color information is reduced by an amount of saturation attenuation defined such that saturation variation falls within a predetermined range according to the first color information, output a second input signal including the second color information; and a fourth sub-pixel signal processing unit configured to output, to a drive circuit that drives the image display unit, a third input signal including third color information on the red component, the green component, the blue component, and the additional color component that are converted based on the second color information in the second input signal, wherein the conversion processing unit converts the saturation of the first color information into the saturation of the second color information such that a color having the saturation of the second color information is shifted toward a color with a greater amount of the additional color component as compared to a color having the saturation of the first color information, and the conversion processing unit performs a calculation to reduce a saturation such that a luminance of the first color information and a luminance of the second color information remain substantially equal to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A color conversion method on an input signal supplied to a drive circuit of an image display unit, the image display unit including a plurality of pixels including a first pixel, a second pixel arrayed next to the first pixel, and a third pixel arrayed next to the first pixel, the first pixel interposed between the second pixel and the third pixel, each of the plurality of pixels including:
-
a first sub-pixel for displaying a red component according to an amount of lighting of a self-emitting element; a second sub-pixel for displaying a green component according to an amount of lighting of a self-emitting element; a third sub-pixel for displaying a blue component according to an amount of lighting of a self-emitting element; and a fourth sub-pixel for displaying an additional color component different from the respective components of the first sub-pixel, the second sub-pixel, and the third sub-pixel according to an amount of lighting of a self-emitting element, and having a higher luminance or a higher power efficiency to display the additional color component as compared to representation with the first sub-pixel, the second sub-pixel, and the third sub-pixel, the color conversion method comprising; receiving a first input signal including first color information on the red component, the green component, and the blue component for display at a predetermined pixel of the plurality of pixels, and is obtained based on an input video signal; performing an image analysis on the input video signal, and if an image is a binary dither image or a brush effect image in which a single color is represented with adjacent pixels as a result of the image analysis, then performing a smoothing process including a calculation to obtain a sum R(n′
) of red component information R(n), which is multiplied by a predetermined weight of (a−
2)/a and contained in a piece of the first color information used for display at the first pixel, red component information R(n−
1), which is multiplied by a predetermined weight of 1/a and contained in a piece of the first color information used for display at the second pixel, and red component information R(n+1), which is multiplied by the predetermined weight of 1/a and contained in a piece of the first color information used for display at a pixel adjacent to the third pixel, the calculation being expressed as R(n′
)=1/a×
R(n−
1)+((a−
2)/a)×
R(n)+1/a×
R(n+1) where n and a are natural numbers excluding zero, to replace the piece of the first color information used for display at the first pixel with the sum R(n′
);converting a saturation of the first color information into a saturation of second color information on the red component, the green component, and the blue component, in which the saturation of the first color information is reduced by an amount of saturation attenuation defined such that saturation variation falls within a predetermined range according to the first color information; outputting a second input signal including the second color information; performing a calculation to reduce a saturation such that a luminance of the first color information and a luminance of the second color information remain substantially equal to each other; and outputting, to the image display unit, a third input signal including third color information on the red component, the green component, the blue component, and the additional color component that are converted based on the second color information in the second input signal, wherein converting the saturation of the first color information is performed such that a color having the saturation of the second color information is shifted toward a color with a greater amount of the additional color component as compared to a color having the saturation of the first color information. - View Dependent Claims (9, 10)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeJapan Display Incorporated
-
Original AssigneeJapan Display Incorporated
-
InventorsYata, Tatsuya, Nakanishi, Takayuki
-
Primary Examiner(s)SALVUCCI, MATTHEW D
-
Application NumberUS14/518,672Publication NumberTime in Patent Office1,275 DaysField of SearchNoneUS Class CurrentCPC Class CodesG09G 2300/0452 Details of colour pixel set...G09G 2320/04 Maintaining the quality of ...G09G 2340/0457 Improvement of perceived re...G09G 2340/06 Colour space transformationG09G 3/3233 with pixel circuitry contro...G09G 5/02 characterised by the way in...H04N 5/57 Control of contrast or brig...H04N 9/73 Colour balance circuits, e....
