| US 7,612,757 B2 | ||
| Liquid crystal display with modulated black point | ||
| Xiao-fan Feng, Vancouver, Wash. (US); and Scott J. Daly, Kalama, Wash. (US) | ||
| Assigned to Sharp Laboratories of America, Inc., Camas, Wash. (US) | ||
| Filed on Oct. 15, 2004, as Appl. No. 10/966,308. | ||
| Claims priority of provisional application 60/568433, filed on May 04, 2004. | ||
| Claims priority of provisional application 60/570177, filed on May 11, 2004. | ||
| Claims priority of provisional application 60/589266, filed on Jul. 19, 2004. | ||
| Prior Publication US 2005/0248593 A1, Nov. 10, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G09G 3/36 (2006.01) | ||
| U.S. Cl. 345—102 | 1 Claim |
| 1. A method for displaying an image on a liquid crystal display comprising:
(a) illuminating a first pixel at a first maximum non-zero illumination level during a first frame;
(b) illuminating said first pixel at a second maximum non-zero illumination level during a second frame, wherein said second
frame is the next frame immediately following said first frame, wherein said second maximum illumination level is greater
than said first maximum illumination level;
(c) wherein said first pixel is decreased in illumination to an intermediate level less than said first maximum illumination
level prior to illuminating said first pixel at said second maximum illumination level during said second frame; and
(d) wherein the magnitude and duration of said second maximum non-zero illumination level are automatically calculated as
a function of said intermediate level and a target image brightness for said next frame, wherein said function is (Target
Brightness−Intermediate level*(frame duration−second maximum illumination level duration))/second maximum illumination level
duration and wherein said target image brightness for said second frame is achieved and said duration is as small as can be
achieved given the brightest value obtainable by said pixel.
|