Four color liquid crystal display and panel therefor

Abstract

A liquid crystal display is provided, which includes a liquid crystal panel assembly including a plurality of red, green, blue and white pixel areas, and a backlight unit placed at a side of the liquid crystal panel assembly. The light emitted from the backlight unit has a color coordinate (x, y) where x ranges from about 0.31 to about 0.34, and y ranges from about 0.32 to about 0.35.

1. A liquid crystal display comprising:
 a liquid crystal panel assembly including a plurality of red, green, blue and white pixel areas, wherein the blue pixel area has an area smaller than the red pixel area and the green pixel area; and 
 a backlight unit placed at a side of the liquid crystal panel assembly, wherein light emitted from the backlight unit has a color coordinate (x, y) where x ranges from about 0.31 to about 0.34, and y ranges from about 0.32 to about 0.35. 
 
     
     
       2. The liquid crystal display of  claim 1 , wherein the liquid crystal panel assembly comprises:
 a first insulating substrate; 
 a plurality of thin film transistors formed on the first insulating substrate; 
 a plurality of pixel electrodes formed on the first insulating substrate and connected to the thin film transistors; 
 a second insulating substrate facing the first insulating substrate; 
 a black matrix formed on the second insulating substrate and defining the pixel areas; 
 red, green and blue color filters formed substantially in the red, green and blue pixel areas, respectively; 
 a common electrode formed on the color filters; and 
 a liquid crystal layer interposed between the first and the second insulating substrates. 
 
     
     
       3. The liquid crystal display of  claim 1 , wherein the white pixel area has an area smaller than the red pixel area and the green pixel area. 
     
     
       4. The liquid crystal display of  claim 1 , wherein total area of the blue pixel area and the white pixel area is substantially the same as the area of any one of the red pixel area and the green pixel area. 
     
     
       5. The liquid crystal display of  claim 1 , wherein the width of the black matrix near the white pixel area is wider than near the other pixel areas. 
     
     
       6. A liquid crystal display comprising:
 a liquid crystal panel assembly including a plurality of red, green, blue and white pixels arranged in an array of a plurality of sets of the red, green, blue and white pixels, each set including the blue and the white pixels adjacent to each other, a pair of the red pixels obliquely facing each other across the blue and the white pixels, and a pair of the green pixels obliquely facing each other across the blue and the white pixels and adjacent to the red pixels, each pixel including a pixel electrode and a thin film transistor; 
 a backlight unit placed at a side of the liquid crystal panel assembly, wherein light emitted from the backlight unit has a color coordinate (x, y) where x ranges from about 0.31 to about 0.34, and y ranges from about 0.32 to about 0.35; 
 a plurality of gate lines extending in a row direction for transmitting a gate signal to the plurality of red, green, blue and white pixels; and 
 a plurality of data lines extending in a column direction for transmitting data signals to the plurality of red, green, blue and white pixels, 
 wherein the blue pixel and the white pixel have triangular shapes. 
 
     
     
       7. The liquid crystal display of  claim 6 , wherein relative positions of the blue pixel and the white pixel in two sets of pixels adjacent in a column direction or in a row direction are reversed. 
     
     
       8. The liquid crystal display of  claim 6 , wherein the pixels have rectangular shapes and the blue and the white pixels are arranged in the column direction to form a separate column. 
     
     
       9. The liquid crystal display of  claim 6 , wherein the blue pixel and the white pixel have triangular shapes to form a diamond shape. 
     
     
       10. The liquid crystal display of claim  9  6, wherein a boundary line between the blue pixel and the white pixel extends in the row direction or the column direction. 
     
     
       11. The liquid crystal display of  claim 6 , wherein the red pixels in adjacent two columns are located in different rows and the red pixels those in adjacent rows are located in different columns, wherein the green pixels in adjacent two columns are placed in different rows and the green pixels in adjacent rows are located in different columns, and wherein either the blue pixels or the white pixels in two sets of pixels adjacent in the row direction are located in different rows, or the blue pixels or the white pixels in two sets adjacent in the column direction are located in different columns. 
     
     
       12. The liquid crystal display of  claim 6 , wherein the liquid crystal display is driven by rendering. 
     
     
       13. A liquid crystal display comprising:
 an array of pixels including a first color pixel representing a first color and a second color pixel representing a second color adjacent to each other, a pair of third color pixels each representing a third color and obliquely facing each other across the first color pixel and the second color pixel, and a pair of fourth color pixels each representing a fourth color and obliquely facing each other across the first color pixel and the second color pixel and adjacent to the third color pixels, each pixel including a pixel electrode and a thin film transistor;   a plurality of gate lines extending in a row direction for transmitting a gate signal to the pixels; and   a plurality of data lines extending in a column direction for transmitting data signals to the pixels,   wherein the first color pixel and the second color pixel have triangular shapes,   one of the pair of third color pixels has an edge adjacent to an edge of the first color pixel, and the other of the pair of third color pixels has an edge adjacent to an edge of the second color pixel,   one of the pair of fourth color pixels has an edge adjacent to an edge of the first color pixel, and the other of the pair of fourth color pixels has an edge adjacent to an edge of the second color pixel, and   the first color, the second color, the third color and the fourth color are different from one another.   
     
     
       14. The liquid crystal display of claim 13, where in the first color, the second color, the third color, and the fourth color respectively correspond to one of red, green, blue and white. 
     
     
       15. The liquid crystal display of claim 14, wherein the first color is white. 
     
     
       16. A display device comprising a pixel group comprising two first color pixels, two second color pixels, a third color pixel and a fourth color pixel, the pixel group further comprises a first row of three pixels and a second row of three pixels, the first row and the second row being adjacent to each other in the column direction,
 wherein the first row comprises one of the two first color pixels, one of the two second color pixels and the third color pixel,   the second row comprises the other of the two first color pixels, the other of the two second color pixels and the fourth color pixel,   the first color pixel, the second color pixel, the third color pixel and the fourth color pixel represent different colors from each other, and   at least one color pixel in each row has a different shape and a different number of edges than the remaining color pixels in the row.   
     
     
       17. The display device of claim 16, wherein the first color pixel is a green pixel, the second color pixel is a red pixel, the third color pixel is a blue pixel, and the fourth color pixel is a white pixel, respectively. 
     
     
       18. The display device of claim 16, wherein the first color pixel is a red pixel, the second color pixel is a green pixel, the third color pixel is a blue pixel, and the fourth color pixel is a white pixel, respectively. 
     
     
       19. A display device comprising:
 a first pixel group comprising at least two pixels, the first pixel group having a substantially quadrilateral shape including four edges, each of the four edges being oblique with respect to a row direction;   a second pixel group substantially surrounding the first pixel group, the second pixel group comprising four pixels adjacent to the four edges of the first pixel group, respectively;   a plurality of gate lines extending in a row direction, the plurality of gate lines transmitting a gate signal to the first pixel group and the second pixel group; and   a plurality of data lines extending in a column direction, the plurality of data lines transmitting data signals to the first pixel group and the second pixel group,   wherein each color of the at least two pixels of the first pixel group is different from each color of the four pixels of the second pixel group, and   the four pixels of the second pixel group have at least two colors.   
     
     
       20. The display device of claim 19, wherein colors of the at least two pixels of the first pixel group are different from each other. 
     
     
       21. The display device of claim 20, wherein a shape of each of the at least two pixels of the first pixel group is triangular. 
     
     
       22. The display device of claim 21, wherein a pixel of the first pixel group and two pixels of the second pixel group are arranged in a row direction. 
     
     
       23. The display device of claim 20, wherein the colors of the two pixels of the first pixel group include blue and white. 
     
     
       24. The display device of claim 20, wherein the colors of the pixels of the second pixel group include red and green.