Color reflective display device and operating method thereof

1. A color reflective display device comprising:

a plurality of color sub-pixels, wherein a first color sub-pixel of the color sub-pixels comprises a first color filter and a plurality of mini-pixels located under the first color filter, wherein each of the mini-pixels comprises a reflective display layer, and the reflective display layer only includes a plurality of white particles and a plurality of black particles; and

a control circuit,

wherein, in a first operating state, the control circuit provides a first driving signal to at least one of the mini-pixels of the first color sub-pixel to locate the white particles on a viewing surface of the reflective display layer to display a first color through the first color filter according to the first driving signal;

the control circuit provides a second driving signal to another at least one of the mini-pixels of the first color sub-pixel to locate the black particles on the viewing surface of the reflective display layer to display a second color through the first color filter according to the second driving signal, wherein the second color is different from the first color; and

the control circuit provides a third driving signal to a second color sub-pixel of the color sub-pixels to locate the white particles on the viewing surface of the reflective display layer, such that the second color sub-pixel displays a third color according to the third driving signal,

wherein the first color is one of three primary colors, the third color is another one of the three primary colors and the second color is black color, and the first color and the second color are used to adjust reflectivity of the third color.

2. The color reflective display device as claimed in claim 1 , wherein a reflectivity of a fourth color mixed by the first color, the second color, and the third color is higher than the reflectivity of the third color.

3. The color reflective display device as claimed in claim 1 , wherein a third color sub-pixel of the color sub-pixels comprises a plurality of mini-pixels, and the control circuit is configured to, in the first operating state, provide the first driving signal to at least one of the mini-pixels of the third color sub-pixel, such that the at least one of the mini-pixels of the third color sub-pixel receiving the first driving signal displays a sixth color according to the first driving signal, and provide the second driving signal to another at least one of the mini-pixels of the third color sub-pixel, such that the another at least one of the mini-pixels of the third color sub-pixel receiving the second driving signal displays a seventh color different from the sixth color according to the second driving signal.

4. The color reflective display device as claimed in claim 3 , wherein the first color is one of red, green, and blue, the sixth color is another one of red, green, and blue, and the third color is the remaining one of red, green, and blue.

5. The color reflective display device as claimed in claim 3 , wherein the second color sub-pixel is a green sub-pixel, the first color sub-pixel is one of a red sub-pixel and a blue sub-pixel, and the third color sub-pixel is another one of the red sub-pixel and the blue sub-pixel.

6. The color reflective display device as claimed in claim 1 , wherein in a situation where there is more than one of the mini-pixels receiving the first driving signal in the first color sub-pixel, the mini-pixels receiving the first driving signal are evenly disposed in the first color sub-pixel.

7. The color reflective display device as claimed in claim 1 , wherein, in a second operating state, the control circuit provides the first driving signal to at least one of the mini-pixels of the first color sub-pixel, such that the at least one of the mini-pixels of the first color sub-pixel receiving the first driving signal to locate the white particle on a viewing surface of the reflective display layer to display the first color through the first color filter according to the first driving signal, and

wherein a number of the mini-pixel receiving the first driving signal to display the first color in the first operating state is different from a number of the mini-pixel receiving the first driving signal to display the first color in the second operating state, such that a reflectivity of a fourth color mixed by the first color, the second color, and the third color in the first operating state is different from a reflectivity of a fifth color mixed by the first color, the second color, and the third color in the second operating state,

wherein the control circuit is configured to determine whether to function in the first operating state or the second operating state according to an ambient light.

8. The color reflective display device as claimed in claim 1 , wherein the control circuit is further configured to provide a fourth driving signal to a fourth color sub-pixel during providing the first driving signal and the second driving signal to the first color sub-pixel, such that the fourth color sub-pixel displays an eighth color according to the fourth driving signal.

9. The color reflective display device as claimed in claim 8 , wherein the eighth color is white.

10. An operating method of a color reflective display device, wherein the color reflective display device comprises a first color sub-pixel, and the first color sub-pixel comprises a fist color filter and a plurality of mini-pixels under the first color filter, the operating method comprising:

providing, in a first operating state, a first driving signal to at least one of the mini-pixels of the first color sub-pixel, wherein each of the mini-pixels comprises a reflective display layer, and the reflective display layer only has a plurality of white particles and black particles, and the first driving signal is provided to locate the white particles on a viewing surface of the reflective display layer to display a first color through the first color filter according to the first driving signal;

providing, in the first operating state, a second driving signal to another at least one of the mini-pixels of the first color sub-pixel to locate the black particles on the viewing surface of the reflective display layer to display a second color through the first color filter according to the second driving signal, wherein the second color is different from the first color; and

providing, in the first operating state, a third driving signal to a second color sub-pixel of the color sub-pixels to locate the white particles on the viewing surface of the reflective display layer such that the second color sub-pixel displays a third color according to the third driving signal,

wherein the first color is one of three primary colors, the third color is another one of the three primary colors and the second color is black color, and the first color and the second color are used to adjust reflectivity of the third color.

11. The operating method as claimed in claim 10 , wherein the reflectivity of fourth color mixed by the first color, the second color, and the third color is higher than a reflectivity of the third color.

12. The operating method as claimed in claim 10 , wherein a third color sub-pixel of the color sub-pixels comprises a plurality of mini-pixels, the operating method comprising:

providing, in the first operating state, the first driving signal to at least one of the mini-pixels of the third color sub-pixel, such that the at least one of the mini-pixels of the third color sub-pixel receiving the first driving signal displays a sixth color according to the first driving signal; and

providing, in the first operating state, the second driving signal to another at least one of the mini-pixels of the third color sub-pixel, such that the another at least one of the mini-pixels of the third color sub-pixel receiving the second driving signal displays a seventh color different from the sixth color according to the second driving signal.

13. The color reflective display device as claimed in claim 12 , wherein the first color is one of red, green, and blue, the sixth color is another one of red, green, and blue, and the third color is the remaining one of red, green, and blue.

14. The color reflective display device as claimed in claim 12 , wherein the second color sub-pixel is a green sub-pixel, the first color sub-pixel is one of a red sub-pixel and a blue sub-pixel, and the third color sub-pixel is another one of the red sub-pixel and the blue sub-pixel.

15. The operating method as claimed in claim 10 , wherein in a situation where there is more than one of the mini-pixels receiving the first driving signal in the first color sub-pixel, the mini-pixels receiving the first driving signal are evenly disposed in the first color sub-pixel.

16. The operating method as claimed in claim 10 , further comprising:

providing, in a second operating state, the first driving signal to at least one of the mini-pixels of the first color sub-pixel, such that the at least one of the mini-pixels of the first color sub-pixel receiving the first driving signal to locate the white particles on a viewing surface of the reflective display layer to display the first color through the first color filter according to the first driving signal,

wherein a number of the mini-pixel receiving the first driving signal to display the first color in the first operating state is different from a number of the mini-pixel receiving the first driving signal to display the first color in the second operating state, such that a reflectivity of a fourth color mixed by the first color, the second color, and the third color in the first operating state is different from a reflectivity of a fifth color mixed by the first color, the second color, and the third color in the second operating state,

wherein whether to function in the first operating state or the second operating state is determined according to an ambient light.

17. The operating method as claimed in claim 10 further comprising:

providing a fourth driving signal to a fourth color sub-pixel during providing the first driving signal and the second driving signal to the first color sub-pixel, such that the fourth color sub-pixel displays an eighth color according to the fourth driving signal.

18. The operating method as claimed in claim 17 , wherein the eighth color is white.

19. The color reflective display device as claimed in claim 7 , wherein the ambient light corresponds to a first intensity when the control circuit is configured to determine to function in the first operating state, the ambient light corresponds to a second intensity when the control circuit is configured to determine to function in the second operating state, and the first intensity is weaker than the second intensity.

20. The operating method as claimed in claim 16 , wherein the ambient light corresponds to a first intensity if the first operating state is determined to be functioned in, the ambient light corresponds to a second intensity if the second operating state is determined to be functioned in, and the first intensity is weaker than the second intensity.