Display device and driving method thereof
A display device includes a scale factor provider, a grayscale converter, and pixels. The scale factor provider calculates an n-th scale factor based on n-th input grayscales received during an n-th frame period. The grayscale converter calculates (n+p)th output grayscales by applying the n-th scale factor to (n+p)th input grayscales received during an (n+p)th frame period in a first mode. The pixels output light to display an image based on the (n+p)th output grayscales, where n is an integer greater than 0 and p is an integer greater than 1.
1. A display device, comprising:
a scale factor provider configured to calculate an n-th scale factor based on n-th input grayscales received from a processor or a timing controller during an n-th frame period;
a grayscale converter configured to calculate (n+p)th output grayscales by applying the n-th scale factor to (n+p)th input grayscales received from the processor or the timing controller during an (n+p)th frame period in a first mode; and
pixels configured to output light to display an image based on the (n+p)th output grayscales,
wherein n is an integer greater than 0 and wherein p is an integer greater than 1.
2. The display device of claim 1 , wherein the first mode is a mode in which p frame periods are one cycle and a first image having substantially same input grayscales is provided for each cycle.
3. The display device of claim 2 , wherein the first image is a black image.
4. The display device of claim 3 , wherein the grayscale converter is configured to calculate output grayscales by applying the n-th scale factor to input grayscales received during an (n+q)th frame period in a second mode, and wherein q is an integer greater than 0 and less than p.
5. The display device of claim 4 , wherein:
the first mode is a Motion Picture Response Time (MPRT) improvement mode, and
the second mode is a normal mode.
6. The display device of claim 1 , wherein the scale factor provider is configured to calculate the n-th scale factor after receiving all of input grayscales of the n-th frame period and before the reception of input grayscales of an (n+1)th frame period starts.
7. The display device of claim 1 , wherein the pixels are configured to start output of the light to display the image based on the (n+p)th output grayscales during the (n+p)th frame period.
8. The display device of claim 7 , wherein the pixels are configured to end output of the light of the image based on the (n+p)th output grayscales during an (n+p+1)th frame period.
9. The display device of claim 1 , wherein the scale factor provider is configured to calculate the n-th scale factor smaller as a load value of the n-th input grayscales increases.
10. The display device of claim 9 , wherein the load value is a sum of gamma conversion values of the n-th input grayscales.
11. A method of driving a display device, the method comprising:
calculating an n-th scale factor based on n-th input grayscales received from a processor or a timing controller during an n-th frame period;
calculating (n+p)th output grayscales by applying the n-th scale factor to (n+p)th input grayscales received during an (n+p)th frame period from the processor or the timing controller in a first mode; and
displaying an image by pixels based on the (n+p)th output grayscales,
wherein n is an integer greater than 0 and wherein p is an integer greater than 1.
12. The method of claim 11 , wherein the first mode is a mode in which p frame periods are one cycle and a first image having substantially the same input grayscales is provided for each cycle.
13. The method of claim 12 , wherein the first image is a black image.
14. The method of claim 13 , further comprising:
calculating output grayscales by applying the n-th scale factor to input grayscales received during an (n+q)th frame period in a second mode, wherein q is an integer greater than 0 and less than p.
15. The method of claim 14 , wherein:
the first mode is a Motion Picture Response Time (MPRT) improvement mode, and
the second mode is a normal mode.
16. The method of claim 11 , wherein in the calculating the n-th scale factor, the n-th scale factor is calculated after receiving all of input grayscales of the n-th frame period and before the reception of input grayscales of an (n+1)th frame period starts.
17. The method of claim 11 , wherein in the displaying the image, the pixels start to display the image based on the (n+p)th output grayscales during the (n+p)th frame period.
18. The driving method of claim 17 , wherein the pixels end displaying the image based on the (n+p)th output grayscales during an (n+p+1)th frame period.
19. The driving method of claim 11 , wherein in the calculating the n-th scale factor, the n-th scale factor is calculated smaller as a load value of the n-th input grayscales increases.
20. The driving method of claim 19 , wherein the load value is a sum of gamma conversion values of the n-th input grayscales.