Gray level control method and optical projection system
US9852671B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | May 15, 2014 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Oct 19, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a gray level control method for outputting a total gray level during a total period, including: dividing the total period into M unit periods; alternatively outputting a gray level “0” or a selected gray level during each unit period; and integrating the gray levels output during the M unit periods to obtain the total gray level, wherein during each of N successive unit periods of the M unit periods the selected gray level is a first gray level, and during each of the remaining (M−N) unit periods the selected gray level is lower than the first gray level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.