Liquid crystal display device

1. A liquid crystal display device, comprising:

a first substrate;

a second substrate arranged facing the first substrate;

a liquid crystal layer arranged between the first substrate and the second substrate;

a plurality of pixels arranged in a matrix and each pixel including sub-pixels corresponding to a plurality of different color areas,

wherein the first substrate includes a plurality of color filters corresponding to the different color areas,

wherein the sub-pixels each include a sub-pixel cell thickness defined by a distance between the second substrate and the color filters,

wherein the sub-pixels each include a sub-pixel slit pitch,

wherein, in each pixel, the sub-pixels include a blue sub-pixel, a green sub-pixel, and a red sub-pixel, and

wherein the blue sub-pixel includes a blue sub-pixel cell thickness and a blue sub-pixel slit pitch, the green sub-pixel includes a green sub-pixel cell thickness and a green sub-pixel slit pitch, and the red sub-pixel includes a red sub-pixel cell thickness and a red sub-pixel slit pitch;

a first electrode arranged in each of the sub-pixels; and

a second electrode arranged at a portion facing the first electrode, wherein

the first electrode comprises:

an electrode base portion extending in a first direction; and

a plurality of comb tooth portions extending in a second direction different from the first direction from the electrode base portion with a certain gap interposed therebetween,

wherein each sub-pixel slit pitch corresponding to a gap between the comb tooth portions adjacent to each other,

wherein the blue sub-pixel slit pitch is greater than the green sub-pixel slit pitch or the red sub-pixel slit pitch, and

wherein the blue sub-pixel cell thickness is less than the green sub-pixel cell thickness or the red sub-pixel cell thickness.

2. The liquid crystal display device according to claim 1 , wherein the sub-pixel slit pitch in a color area having a highest human visibility out of the different color areas is smaller than the sub-pixel slit pitch in the other color area.

3. The liquid crystal display device according to claim 1 , wherein

a color filter thickness of the blue sub-pixel is larger than a color filter thickness of the green sub-pixel or the red sub-pixel.

4. The liquid crystal display device according to claim 1 , wherein values obtained by multiplying the sub-pixel cell thickness by the sub-pixel slit pitch in the respective sub-pixels are substantially equal to one another.

5. The liquid crystal display device according to claim 3 , wherein:

a cell thickness is a distance between the second substrate and the color filters, and

values obtained by multiplying the sub-pixel cell thickness by the sub-pixel slit pitch in the respective sub-pixels are substantially equal to one another.

6. The liquid crystal display device according to claim 1 , wherein

the sub-pixels include a fourth sub-pixel that represents a different color area than the blue sub-pixel, the green sub-pixel and the red sub-pixel, and

a slit pitch of the fourth sub-pixel is different from at least one of the blue sub-pixel slit pitch, the green sub-pixel slit pitch and the red sub-pixel slit pitch.

7. The liquid crystal display device according to claim 6 , wherein the liquid crystal display device switches between a three-pixel mode for performing display with the blue sub-pixel, the green sub-pixel, and the red sub-pixel, and a four-pixel mode for performing display with the blue sub-pixel, the green sub-pixel, the red sub-pixel, and the fourth sub-pixel.

8. The liquid crystal display device according to claim 1 , further comprising an orientation film, wherein liquid crystal molecules are aligned in parallel to the second direction.

9. The liquid crystal display device according to claim 1 , wherein the liquid crystal display device includes a plurality of the first electrodes including a first-first electrode and a second-first electrode that is adjacent to the first-first electrode.

10. The liquid crystal display device according to claim 9 , wherein a tip of the comb tooth portions of the first-first electrode and a tip of the comb tooth portions of the second-first electrode are arranged alternately in the first direction.

11. The liquid crystal display device according to claim 10 , wherein the tip of the comb tooth portions of the first-first electrode and the tip of the comb tooth portions of the second-first electrode are alternately opposed to each other.