Signal conversion circuit and multiple primary color liquid crystal display device with the circuit
First Claim
1. A signal conversion circuit for use in a multiprimary liquid crystal display device which performs display by using four or more primary colors, comprising:
- a signal conversion circuit configured to convert an input video signal to a multiprimary signal corresponding to four or more primary colors, whereinwhen generating a multiprimary signal for a pixel of the multiprimary liquid crystal display device to display dark skin according to the Macbeth chart, the signal conversion circuit applies a conversion to the video signal so that a color difference Δ
u′
v′
=((u′
−
u60′
)2+(v′
−
v60′
)2) is 0.03 or less, the color difference Δ
u′
v′
being defined by CIE1976 chromaticity coordinates (u′
, v′
) representing a chromaticity when the pixel is viewed from a frontal direction and CIE1976 chromaticity coordinates (u60′
, v60′
) representing a chromaticity when the pixel is viewed from a 60°
oblique direction.
1 Assignment
0 Petitions
Accused Products
Abstract
In one embodiment of the present invention, a signal conversion circuit is disclosed which is suitably used in a multiprimary liquid crystal display device, and a multiprimary liquid crystal display device having such a signal conversion circuit. A signal conversion circuit according to one embodiment of the present invention is for use in a multiprimary liquid crystal display device, and converts an input video signal to a multiprimary signal corresponding to four or more primary colors. When generating a multiprimary signal for displaying dark skin, the signal conversion circuit according to an embodiment of the present invention applies a conversion to the video signal so that a color difference Δu′v′=((u′−u60′)2+(v′−v60′)2) is 0.03 or less, the color difference Δu′v′ being defined by CIE1976 chromaticity coordinates (u′, v′) representing a chromaticity when the pixel is viewed from the frontal direction and CIE1976 chromaticity coordinates (u60′, v60′) representing a chromaticity when the pixel is viewed from a 60° oblique direction.
22 Citations
12 Claims
-
1. A signal conversion circuit for use in a multiprimary liquid crystal display device which performs display by using four or more primary colors, comprising:
-
a signal conversion circuit configured to convert an input video signal to a multiprimary signal corresponding to four or more primary colors, wherein when generating a multiprimary signal for a pixel of the multiprimary liquid crystal display device to display dark skin according to the Macbeth chart, the signal conversion circuit applies a conversion to the video signal so that a color difference Δ
u′
v′
=((u′
−
u60′
)2+(v′
−
v60′
)2) is 0.03 or less, the color difference Δ
u′
v′
being defined by CIE1976 chromaticity coordinates (u′
, v′
) representing a chromaticity when the pixel is viewed from a frontal direction and CIE1976 chromaticity coordinates (u60′
, v60′
) representing a chromaticity when the pixel is viewed from a 60°
oblique direction. - View Dependent Claims (2, 3, 5, 6, 7, 8)
-
-
4. A signal conversion circuit for use in a multiprimary liquid crystal display device which performs display by using four or more primary colors, comprising:
-
a signal conversion circuit configured to convert an input video signal to a multiprimary signal corresponding to four or more primary colors, wherein when generating a multiprimary signal for a pixel of the multiprimary liquid crystal display device to display light skin according to the Macbeth chart, the signal conversion circuit applies a conversion to the video signal so that a color difference Δ
u′
v′
=((u′
−
u60′
)2+(v′
−
v60′
)2) is 0.01 or less, the color difference Δ
u′
v′
being defined by CIE1976 chromaticity coordinates (u′
, v′
) representing a chromaticity when the pixel is viewed from a frontal direction and CIE1976 chromaticity coordinates (u60′
, v60′
) representing a chromaticity when the pixel is viewed from a 60°
oblique direction. - View Dependent Claims (9, 10, 11, 12)
-
Specification
-
- Resources
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Current AssigneeSharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
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Original AssigneeSharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
-
InventorsTomizawa, Kazunari, Mori, Tomohiko, Ueki, Shun, Muroi, Takao
-
Primary Examiner(s)Beck, Alexander S
-
Assistant Examiner(s)Rayan, Mihir
-
Application NumberUS12/312,747Publication NumberTime in Patent Office1,799 DaysField of Search345/694US Class Current345/694CPC Class CodesG02F 1/133514 Colour filtersG02F 2201/52 RGB geometrical arrangementsG09G 2300/0447 for multi-domain technique ...G09G 2300/0452 Details of colour pixel set...G09G 2320/0242 Compensation of deficiencie...G09G 2340/06 Colour space transformationG09G 3/3607 for displaying colours or f...
