Color display, liquid crystal display, and semi-transmissive liquid crystal display

1. A color display device having a matrix array of unit pixel layouts each comprised of four colors of sub-pixels for performing color displaying, wherein each color is made substantially equal in total area while causing an area of sub-pixel and a number thereof to be different on a per-color basis,

wherein

each sub-pixel includes a single unit sub-pixel or a plurality of unit sub-pixels which are placed adjacent to each other;

size of each of the unit sub-pixels is substantially equal each other;

said four colors include two colors red (R) and blue (B) with lower visual sensitivity and two colors with higher visual sensitivity;

the two colors of sub-pixels with higher visual sensitivity among said four colors of sub-pixels are each constituted from two unit sub-pixels which are not directly adjacent to each other;

each of the red (R) sub-pixel and the blue (B) sub-pixel comprises two unit sub-pixels, which are directly adjacent to each other;

each of the single unit sub-pixels consists of one color of sub-pixels;

each of the two unit sub-pixels included in the red (R) and blue (B) sub-pixels includes a thin-film transistor;

two thin-film transistors of the two unit sub-pixels included in the red (R) sub-pixel are connected to a same signal line; and

two thin-film transistors of the two unit sub-pixels included in the blue (B) sub-pixel are connected to a same signal line,

each of the single unit sub-pixels of the two colors of sub-pixels with higher visual sensitivity among said four colors of sub-pixels includes one thin-film transistor.

2. The color display device according to claim 1 , wherein an area of two colors of sub-pixels with higher visual sensitivity among said four colors of sub-pixels is set at approximately one-half of an area of remaining two colors of sub-pixels with lower visual sensitivity among said four colors of sub-pixels and wherein the two colors of sub-pixels with higher visual sensitivity among said four colors of sub-pixels are two times greater in number than the two colors of sub-pixels with lower visual sensitivity among said four colors of sub-pixels.

3. The color display device according to claim 2 , wherein colors of the two colors of sub-pixels with higher visual sensitivity among said four colors of sub-pixels are green (G) and white (W) whereas colors of the two colors of sub-pixels with lower visual sensitivity among said four colors of sub-pixels are red (R) and blue (B).

4. The color display device according to claim 2 , wherein colors of the two colors of sub-pixels with higher visual sensitivity among said four colors of sub-pixels are blue-blended green (CG) and yellow-blended green (YG) whereas colors of the two colors of sub-pixels with lower visual sensitivity among said four colors of sub-pixels are red (R) and blue (B).

5. The color display device according to claim 1 , wherein sub-pixels included in a pixel unit arrangement for use as a repeat unit is made up, in total, of twelve (12) sub-pixels consisting essentially of a total of eight (8) ones each corresponding to any one of two colors of sub-pixels with higher visual sensitivity among said four colors of sub-pixels and a total of four ones each corresponding to any one of two colors of sub-pixels with lower visual sensitivity among said four colors of sub-pixels.

6. The color display device according to claim 1 , wherein at each of intersections of signal lines and scan lines which are disposed to cross together in a matrix form, an intersection of a signal line and a scan line with a plurality of thin-film transistors being disposed for connection to the signal line and the scan line and an intersection of a signal line and a scan line with a one thin-film transistor being disposed are arranged to coexist.

7. The color display device according to claim 1 ,

wherein said color display device having a layer of liquid crystal material as filled in a gap space between two substrates with a color display device being provided for performing color displaying while letting unit pixel layouts be disposed in a matrix form, each said unit pixel layout being configured from a plurality of subpixels of red (R), green (G), blue (B) and white (W), wherein each said subpixel an arrangement is employed to drive the liquid crystal by a comb-shaped signal electrode and a common electrode provided on one substrate, and wherein a distance between the signal line and the signal electrode end portion is changed on a per-color basis, wherein a red or blue color filter is formed on a signal line, and wherein a red or blue color filter is disposed nearer to a white (W) subpixel than the signal line,

wherein a number of teeth of the comb-shaped signal electrode is changed on a per-color basis,

wherein comb teeth of signal electrode of white (W) subpixel are arranged to be greater in number than comb teeth of signal electrode of those subpixels of the other colors,

wherein the distance between the signal line and signal electrode end portion is designed to be shorter than a distance between a signal line and a signal electrode end portion in at least one of the subpixel from three primary colors.

8. A color liquid crystal display device having a layer of liquid crystal material as filled in a gap space between two substrates with a color display device being provided for performing color displaying while letting unit pixel layouts be disposed in a matrix form, each said unit pixel layout being configured from a plurality of subpixels of red (R), green (G), blue (B) and white (W), which form a plurality of unit sub-pixels which are placed adjacent to each other with a size of each of the unit sub-pixels being substantially equal each other,

wherein a black matrix is formed between directly adjacent subpixels of red (R) and green (G) and also between directly adjacent subpixels of blue (B) and green (G);

wherein the black matrix is prevented from being formed between directly adjacent subpixels of red (R) and white (W) and between directly adjacent subpixels of blue (B) and white (W) and wherein a red or blue color filter is formed on a signal line;

wherein each of the red (R) subpixel and the blue (B) subpixel includes two unit sub-pixels which are directly adjacent to each other;

wherein each of the green (G) subpixel and the white (W) subpixel includes a single unit sub-pixel;

each of the single unit sub-pixels consists of one color of sub-pixels;

wherein the unit subpixel of the subpixel included in the subpixel of one of red (R), green (G), blue (B) and white (W) has a thin film transistor placed different position from the other unit subpixel.

9. The color liquid crystal display device according to claim 8 , wherein a boundary of red and blue color filters between red (R) and blue (B) subpixels and white (W) subpixel is disposed to be more adjacent to the white (W) subpixel side than a signal line between the red (R) and blue (B) subpixels and the white (W) subpixel.

10. The color liquid crystal display device according to claim 8 , wherein in each said subpixel an arrangement is employed to drive the liquid crystal by a comb-shaped signal electrode and a common electrode provided on one substrate, and wherein a distance of a signal line and a signal electrode end portion is changed on a per-color basis.

11. The color liquid crystal display device according to claim 8 , wherein a number of teeth of the comb-shaped signal electrode is changed on a per-color basis.