Electro-optic displays, and methods for driving same
A method for driving an electro-optic display having a plurality of display pixels, the method includes dithering a grayscale image into a black and white image, updating the plurality of display pixels to display the black and white image, and converting the black and white image back to the grayscale image.
1. A method for driving an electro-optic display having a plurality of display pixels, the method comprising:
dithering a grayscale image into a black and white image;
updating the plurality of display pixels to display the black and white image using n n number of waveforms, the waveforms having n frames, n being an integer number; and
converting the black and white image back to the grayscale image.
2. The method of claim 1 further comprising applying a waveform configured to remove artifacts from the plurality of display pixels.
3. The method of claim 1 , wherein the step of dithering the grayscale image into a black and white image comprises using a half-toning algorithm.
4. The method of claim 3 , wherein the half-toning algorithm is a green noise half-toning algorithm.
5. The method of claim 1 , wherein the step of dithering the grayscale image into a black and white image comprises using a clustered half-toning map.
6. The method of claim 1 , wherein the step of updating the plurality of display pixels comprises applying a single frame negative polarity voltage to a display pixel when the display pixel switches from a black optical state to a white optical state.
7. The method of claim 1 , wherein the step of updating the plurality of display pixels comprises applying a single frame positive polarity voltage to a display pixel when the display pixel switches from a white optical state to a black optical state.
8. The method of claim 1 wherein n=3.
9. The method of claim 1 wherein the step of updating the plurality of display pixels comprises using 27 waveforms.
10. The method of claim 1 , wherein the step of updating the plurality of display pixels is substantially DC balanced.
11. The method of claim 1 wherein the electro-optic display is an electrophoretic display having an electro-optic medium.
12. The electro-optic display of claim 11 wherein the electro-optic medium is a rotating bichormal member or electrochromic medium.
13. The electro-optic display of claim 11 wherein the electro-optic medium is an electrophoretic medium comprising a plurality of charged particles in a fluid and capable of moving through the fluid on application of an electric field to the electro-optic medium.