Display signal conversion apparatus

1. A display signal conversion apparatus for converting a first signal having a first color format and color arrangement into a second signal having a second color format and color arrangement, the display signal conversion apparatus comprising:

a color conversion unit configured to convert the first color format into the second color format;

a pattern determination unit configured to determine a signal pattern of the first signal;

a unit configured to determine a color arrangement of a pixel position of the second signal corresponding to a pixel position of the first signal; and

a sub pixel signal generation unit configured to generate a sub pixel signal having the second color format and color arrangement based on a result of the signal pattern determination and a result of the color arrangement determination.

2. The display signal conversion apparatus according to claim 1 , wherein the first signal comprises a signal of disposing RGB sub pixels at individual pixels, and

wherein the second signal comprises a signal of disposing one of RG sub pixels and BW sub pixels at individual pixels.

3. The display signal conversion apparatus according to claim 2 , wherein the color conversion unit converts RGB of the first signal into RGBW of the second signal, and

wherein the color conversion unit controls amplitude of a W signal based on a result of the pattern determination unit.

4. The display signal conversion apparatus according to claim 2 , wherein the color conversion unit converts RGB of the first signal into RGBW of the second signal, and

wherein the color conversion unit controls amplitude of a W signal based on chroma saturation of a screen.

5. The display signal conversion apparatus according to claim 2 , wherein the color conversion unit converts RGB of the first signal into RGBW of the second signal, and

wherein the color conversion unit controls amplitude of a W signal based on environmental brightness.

6. The display signal conversion apparatus according to claim 2 , wherein the color conversion unit converts RGB of the first signal into RGBW of the second signal, and

wherein the color conversion unit controls amplitude of a W signal based on a time interval of operation by a user.

7. The display signal conversion apparatus according to claim 1 , wherein the color format of the second signal comprises RGBW, and

wherein the pixel of the second signal that is associated with the pixel position of the first signal has two colors selected from the groups consisting of R, G, B and W.

8. The display signal conversion apparatus according to claim 1 , wherein the pattern determination unit sets a background color and a foreground color in an arbitrary region in color space having a coordinate axis of one of a first color and a second color,

wherein the pattern determination unit generates binary signals indicating whether a target pixel and adjacent pixels belong to the arbitrary region, and

wherein the pattern determination unit sets a combination of the binary signals of the target pixel and the adjacent pixels as a determination target.

9. The display signal conversion apparatus according to claim 8 , wherein the pattern determination unit generates binary signal patterns of at least yellow color, blue color, white color, and black color, and

wherein the binary signal patterns indicate a pixel arrangement as one of the background color and the foreground color.

10. The display signal conversion apparatus according to claim 1 , wherein the first signal comprises:

an RGB signal supplied externally and an RGB signal generated internally; and

wherein the second signal comprises:

R, G, B and W formats of sub pixels on a line width of a pixel.

11. The display signal conversion apparatus according to claim 1 , wherein:

the color format of the first signal comprises RGB;

the color formats of the second signal corresponding to the pixel position of the first signal are four formats of RGB, GBW, BWR, and WRG; and

the color arrangement of the second signal comprises a cyclic arrangement of RGB, GBW, BWR, and WRG in a horizontal direction.

12. The display signal conversion apparatus according to claim 1 , wherein the sub pixel signal generation unit generates the sub pixel signal having a period shorter than a pixel period of an input signal.

13. A display signal conversion apparatus comprising:

a unit configured to perform color conversion of an input RGB signal into an RGBW signal;

a unit configured to determine a signal pattern of a two-dimensional position of one of the input RGB signal and the RGBW signal after the color conversion;

a pattern determination unit configured to determine a sub pixel arrangement corresponding to a pixel position of an input signal; and

a sub pixel signal generation unit configured to generate a sub pixel signal using a predetermined arrangement conversion based on a result of the signal pattern determination and the sub pixel arrangement determination.

14. The display signal conversion apparatus according to claim 13 , wherein the sub pixel signal generation unit generates the sub pixel signal by converting the RGBW signal of a target pixel into one of a different pixel and a different color based on a signal pattern determination signal of the target pixel and a sub pixel arrangement signal.

15. The display signal conversion apparatus according to claim 14 , wherein the sub pixel signal generation unit comprises a logic circuit configured to generate the sub pixel signal that meets conditions of the signal pattern determination signal of the target pixel and the sub pixel arrangement signal.