| US 7,525,528 B2 | ||
| Technique that preserves specular highlights | ||
| Xiao-Fan Feng, Vancouver, Wash. (US) | ||
| Assigned to Sharp Laboratories of America, Inc., Camas, Wash. (US) | ||
| Filed on Sep. 22, 2005, as Appl. No. 11/233,748. | ||
| Claims priority of provisional application 60/628799, filed on Nov. 16, 2004. | ||
| Prior Publication US 2006/0103621 A1, May 18, 2006 | ||
| Int. Cl. G09G 3/36 (2006.01) | ||
| U.S. Cl. 345—87 [345/102] | 8 Claims |
| 1. A method for displaying an image on a liquid crystal display that includes an array of a plurality of light-emitting elements
and a light valve, said method comprising:
(a) receiving an said image;
(b) creating a first modification of said received image by:
(i) applying a first low-pass filter to said image to produce a first filtered image; and
(ii) sub-sampling said first filtered image at the resolution of said array of plurality of light-emitting elements;
c) creating a second modification of said image, independent from said first modification of said image, by:
(i) applying a second low-pass filter to said image, different from said first low pass filter, to produce a second low pass
filtered image, said second low pass filter based on an anticipated specular pattern; and
(ii) segmenting said second low pass filtered image into a plurality of blocks, each said block associated with one of said
light-emitting elements, and calculating a respective substantial maximum luminance in each said block;
(d) creating a composite of said first modification and said second modification by selecting, for each said light-emitting
element, a respective one of either said substantial maximum luminance associated with said light emitting element in said
second modification of said image, or a predetermined statistical measure of the sub-sampled luminance value, associated with
said light-emitting element, in said first modification of said image; and
(e) using said composite to drive said array of a plurality of light-emitting elements.
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