Display device and manufacturing method thereof

1. A apparatus, comprising:

a light source for emitting light of a plurality of colors;

an element provided in each of a plurality of pixels, for switching transmission and non-transmission of the light from the light source; and

a control unit for driving the light source and the element to represent a gray level based on presence and absence of a light transmission period in each of a plurality of sub-frame periods constituting one frame period for displaying one image, wherein:

the plurality of sub-frame periods are divided into:

a first group to which sub-frame periods with the same length of light transmission periods belong; and

a second group to which sub-frame periods with lengths of light transmission periods shorter than the length of the light transmission periods of the sub-frame periods in the first group belong;

within the frame period, sub-frame periods from the first group increase in number from a middle of the frame period toward the start and end of the frame period in accordance with an increase of the gray level; and

each of the plurality of sub-frame periods comprises a plurality of light transmission periods in which light of the plurality of colors is transmitted.

2. The apparatus according to claim 1 , wherein the sub-frame periods that belong to the first group alternate with sub-frame periods that belong to the second group.

3. The apparatus according to claim 1 , wherein one or more sub-frame periods that belong to the second group are arranged before and after a sub-frame period having the light transmission period at the lowest gray level among the sub-frame periods that belong to the first group.

4. The apparatus according to claim 1 , wherein a blank period or corresponding one of the sub-frame periods that belong to the second group is arranged between every adjacent two of the sub-frame periods that belong to the first group.

5. The apparatus according to claim 1 , wherein sub-frame periods associated with blue color are arranged on the start and end points of the frame period.

6. The apparatus according to claim 5 , wherein one of the sub-frame periods that belongs to the first group is arranged between a light transmission period of the second group for the blue color and light transmission periods of the second group for other colors.

7. The apparatus according to claim 1 , further comprising:

a first pixel in which the sub-frame periods having the light transmission period among the sub-frame periods that belong to the first group increase in number from the start point side and the end point side of the frame period towards a center of the frame period, in an alternate manner in accordance with the increase of the gray level so as to make a symmetrical relation to a first pixel gray level; and

a second pixel in which the sub-frame periods having the light transmission period among the sub-frame periods that belong to the first group increase in number from the start point side and the end point side of the frame period in an alternate manner with the increase in the gray level, so that the first pixel and the second pixel are arranged two-dimensionally in an alternate manner.

8. The apparatus according to claim 7 , wherein the first pixel and the second pixel switch places for each frame period.

9. The apparatus according to claim 1 , further comprising:

a display including the light source and the plurality of pixels;

a processor that is capable of communicating with the display, the processor being capable of processing image data; and

a memory device that is capable of communicating with the processor.

10. The apparatus according to claim 9 , further comprising:

a driver circuit capable of sending at least one signal to the display; and wherein

the processor is further capable of sending at least a portion of the image data to the driver circuit.

11. The apparatus according to claim 9 , further comprising:

an image source module capable of sending the image data to the processor, wherein the image source module includes at least one of a receiver, transceiver, and transmitter.

12. The apparatus according to claim 9 , further comprising:

an input device capable of receiving input data and to communicate the input data to the processor.

13. A method of forming an image on a display, comprising:

driving a light source and a plurality of elements provided in respective pixels of the display to represent a gray level based on presence and absence of a light transmission period in each of a plurality of sub-frame periods constituting one frame period for displaying one image, wherein:

the plurality of sub-frame periods are divided into:

a first group to which sub-frame periods with the same length of light transmission periods belong; and

a second group to which sub-frame periods with lengths of light transmission periods shorter than the length of the light transmission periods of the sub-frame periods in the first group belong;

within the frame period, sub-frame periods from the first group increase in number from a middle of the frame period toward the start and end of the frame period in accordance with an increase of the gray level; and

each of the plurality of sub-frame periods comprises a plurality of light transmission periods in which light of the plurality of colors is transmitted.

14. The method according to claim 13 , wherein the sub-frame periods that belong to the first group alternate with sub-frame periods that belong to the second group.

15. The method according to claim 13 , wherein one or more sub-frame periods that belong to the second group are arranged before and after a sub-frame period having the light transmission period at the lowest gray level among the sub-frame periods that belong to the first group.

16. The method according to claim 13 , wherein a blank period or corresponding one of the sub-frame periods that belong to the second group is arranged between every adjacent two of the sub-frame periods that belong to the first group.

17. The method according to claim 13 , wherein sub-frame periods associated with blue color are arranged on the start and end points of the frame period.

18. The method according to claim 17 , wherein one of the sub-frame periods that belongs to the first group is arranged between a light transmission period of the second group for the blue color and light transmission periods of the second group for other colors.

19. The method according to claim 17 , wherein the light source and plurality of elements are drive such that:

for a first pixel, the sub-frame periods having the light transmission period among the sub-frame periods that belong to the first group increase in number from the start point side and the end point side of the frame period towards a center of the frame period, in an alternate manner in accordance with the increase of the gray level so as to make a symmetrical relation to a first pixel gray level; and

for a second pixel, the sub-frame periods having the light transmission period among the sub-frame periods that belong to the first group increase in number from the start point side and the end point side of the frame period in an alternate manner with the increase in the gray level, so that the first pixel and the second pixel are arranged two-dimensionally in an alternate manner.

20. A computer readable medium storing processor executable instructions, which when executed by a processor cause the processor to carry out a method of forming an image on a display, the method comprising:

driving a light source and a plurality of elements provided in respective pixels of the display to represent a gray level based on presence and absence of a light transmission period in each of a plurality of sub-frame periods constituting one frame period for displaying one image, wherein:

the plurality of sub-frame periods are divided into:

a first group to which sub-frame periods with the same length of light transmission periods belong; and

a second group to which sub-frame periods with lengths of light transmission periods shorter than the length of the light transmission periods of the sub-frame periods in the first group belong;

within the frame period, sub-frame periods from the first group increase in number from a middle of the frame period toward the start and end of the frame period in accordance with an increase of the gray level; and

each of the plurality of sub-frame periods comprises a plurality of light transmission periods in which light of the plurality of colors is transmitted.

21. The computer readable medium according to claim 20 , wherein the sub-frame periods that belong to the first group alternate with sub-frame periods that belong to the second group.

22. The computer readable medium according to claim 20 , wherein one or more sub-frame periods that belong to the second group are arranged before and after a sub-frame period having the light transmission period at the lowest gray level among the sub-frame periods that belong to the first group.

23. The computer readable medium according to claim 20 , wherein a blank period or corresponding one of the sub-frame periods that belong to the second group is arranged between every adjacent two of the sub-frame periods that belong to the first group.

24. The computer readable medium according to claim 20 , wherein sub-frame periods associated with blue color are arranged on the start and end points of the frame period.

25. The computer readable medium according to claim 24 , wherein one of the sub-frame periods that belongs to the first group is arranged between a light transmission period of the second group for the blue color and light transmission periods of the second group for other colors.

26. The computer readable medium according to claim 20 , wherein the processor executable instructions cause the processor to drive the light source and plurality of elements such that:

for a first pixel, the sub-frame periods having the light transmission period among the sub-frame periods that belong to the first group increase in number from the start point side and the end point side of the frame period towards a center of the frame period, in an alternate manner in accordance with the increase of the gray level so as to make a symmetrical relation to a first pixel gray level; and

for a second pixel, the sub-frame periods having the light transmission period among the sub-frame periods that belong to the first group increase in number from the start point side and the end point side of the frame period in an alternate manner with the increase in the gray level, so that the first pixel and the second pixel are arranged two-dimensionally in an alternate manner.