SIGNAL CONVERSION CIRCUIT, AND MULTIPLE PRIMARY COLOR LIQUID CRYSTAL DISPLAY DEVICE HAVING THE CIRCUIT
First Claim
1. A signal conversion circuit for use in a multiprimary liquid crystal display device which performs display in a vertical alignment mode by using four or more primary colors, the signal conversion circuit converting 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
There is provided a signal conversion circuit which is suitably used in a multiprimary liquid crystal display device (especially a multiprimary liquid crystal display device which performs display in a vertical alignment mode), and a multiprimary liquid crystal display device having such a signal conversion circuit.
A signal conversion circuit according to the present invention is for use in a multiprimary liquid crystal display device which performs display in a vertical alignment mode, 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 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.
-
Citations
14 Claims
-
1. A signal conversion circuit for use in a multiprimary liquid crystal display device which performs display in a vertical alignment mode by using four or more primary colors, the signal conversion circuit converting 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, 9, 10, 11, 12, 13, 14)
- u′
-
4. A signal conversion circuit for use in a multiprimary liquid crystal display device which performs display in a vertical alignment mode by using four or more primary colors, the signal conversion circuit converting 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.
- u′
Specification