Image display device, method of driving image display device, and electronic apparatus

1. An image display device, comprising:

a plurality of dots each of which comprises M sub-pixels configured to display different colors and being disposed adjacent to each other in a first direction, wherein

M is an integer greater than 3, and

a ratio of a length of each dot in the first direction to a length of said dot in a second direction orthogonal to the first direction is M:3;

a resolution converter for reducing a resolution in the first direction of input image data, which defines an image to be displayed by every dot, by 3/M;

a color separating unit for separating color components of the image data converted by the resolution converter into color components corresponding to the M sub-pixels for every dot; and

a driving circuit for driving the sub-pixels to display the image at a resolution defined by the image data outputted by the color separating unit.

2. The image display device according to claim 1 , wherein

the input image data comprises M dot image data; and

the resolution converter is configured for

determining whether the M dot image data is of achromatic color, and then

converting the M dot image data to 3 dot image data in accordance with a predetermined rule on the basis of the determination.

3. The image display device according to claim 2 , wherein the resolution converter is further configured for, when it is determined that the M dot image data is of achromatic color,

comparing luminance information of the M dot image data with a predetermined threshold value, and then

converting the M dot image data into the 3 dot image data on the basis of the comparison.

4. The image display device according to claim 2 , wherein the resolution converter is further configured for, when it is determined that the M dot image data is not of achromatic color,

distributing a predetermined coefficient in the M dot image data to change the M dot image data into the 3 dot image data.

5. The image display device according to claim 1 , wherein M is 4.

6. An electronic apparatus, comprising:

the image display device according to claim 1 .

7. A method of driving an image display device in which each of a plurality of dots comprises M sub-pixels configured to display different colors and being disposed adjacent to each other in a first direction, wherein

M is an integer greater than 3, and

a ratio of a length of each dot in the first direction to a length of said dot in a second direction orthogonal to the first direction is M:3;

the method comprising:

converting input image data, which defines an image to be displayed by every dot, wherein said converting comprises reducing, by a resolution converter, a resolution in the first direction of the input image data by 3/M;

separating, by a color separating unit, color components of the image data converted by the resolution converter into color components corresponding to the M sub-pixels for every dot; and

driving, by a driving unit, the sub-pixels to display the image at a resolution defined by the image data outputted by the color separating unit.

8. The method according to claim 6 , wherein

the input image data comprises M dot image data; and

the converting further comprises

determining whether the M dot image data is of achromatic color, and then

converting the M dot image data to 3 dot image data in accordance with a predetermined rule on the basis of the determination.

9. The method according to claim 8 , wherein the converting further comprises, when it is determined that the M dot image data is of achromatic color,

comparing luminance information of the M dot image data with a predetermined threshold value, and then

converting the M dot image data into the 3 dot image data on the basis of the comparison.

10. The method according to claim 8 , wherein the converting further comprises, when it is determined that the M dot image data is not of achromatic color,

distributing a predetermined coefficient in the M dot image data to change the M dot image data into the 3 dot image data.

11. The method according to claim 8 , wherein M is 4.

12. An image display device in which one dot is displayed using M (M is an integer larger than 3) sub-pixels having different colors and being disposed adjacent to each other in a vertical direction or horizontal direction, a ratio of a length of a sub-pixel of the one dot in a disposition direction to a length in a direction orthogonal to the disposition direction being M:3, comprising:

a resolution converter that converts the resolution in the disposition direction of the image data which defines an image to be displayed for every dot to 3/M;

a color separating unit that separates color components of the image data converted by the resolution converter into color components corresponding to the M sub-pixels for every dot; and

a driving circuit that drives the sub-pixels so as to have a resolution defined by the image data separated by the color separating unit;

wherein the resolution converter determines whether the M dot image data is of achromatic, and then converts 3 dot image data with a predetermined rule on the basis of the determination.

13. The image display device according to claim 12 , wherein when it is determined that the M dots are of achromatic on the basis of the M dot image data, the resolution converter compares luminance information of the M dot image data with a predetermined threshold value, and then converts the M dot image data into 3 dot image data on the basis of the comparison.

14. The image display device according to claim 12 , wherein when it is determined that the M dot image data is not of achromatic, the resolution converter distributes a predetermined coefficient in the M dot image data to change the M dot image data into 3 dot image data.

15. The image display device according to claim 12 , wherein M is 4.