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US 8,665,206 B2Granted
Driving method to neutralize grey level shift for electrophoretic displays
AssigneeSiPix Imaging, Inc.
InventorsCraig Lin, Jiing Shiuh Chu
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Abstract
The present invention provides driving methods for a display having a binary color system of a first color and a second color, which methods can effectively neutralize the grey level shifts due to degradation of a display medium.
Claims12
A driving method for an electrophoretic display, which comprises:
- a) selecting a first waveform or a second waveform to drive a pixel to a desired color, wherein said first waveform shifts intermediate color states between a first color state and a second color state towards the first color state after degradation, and said second waveform shifts the intermediate color states between the first color state and the second color state towards the second color state after degradation;
- b) determining a shift error value from a grey level variation chart based on the selected first or second waveform in (a) above and the desired color of the pixel;
- c) adding the shift error value to a cumulative error value of said pixel;
- and
- d) performing error diffusion based on the cumulative error value and the grey level variation chart.
2 more elements
Dependencies are inferred from the claim text.