United States Patent
Gove et al.
[54] PIXEL DATA PROCESSING FOR SPATIAL LIGHT MODULATOR HAVING STAGGERED PLXELS
[75] Inventors: Robert J. Gove, Los Gatos, Calif.;
Vishal Markandey, Dallas, Tex.
[73] Assignee: Texas Instruments Incorporated, Dallas, Tex.
[21] Appl. No.: 407,938
[22] Filed: Mar. 21,1995
[51] Int. CI.6 H04N 5/74; H04N 7/01
[52] U.S. CI 348/441; 348/448; 348/771
[58] Field of Search 348/770, 771,
348/441, 448, 581; 345/127, 204, 214;
H04N 5/74, 7/01
[56] References Cited
U.S. PATENT DOCUMENTS 4,879,602 11/1989 Glenn 348/271
ill mil I i ii III in inn II:: Iiii 11II in II
US005530482A [ii] Patent Number: 5,530,482 [45] Date of Patent: Jun. 25, 1996
4,916,541 4/1990 Hashimoto et al 348/448
5,422,658 6/1995 Kawaguchi 348/448
5,442,411 8/1995 Urbanus 348/771
Primary Examiner—Victor R. Kostak
Attorney, Agent, or Firm—Julie L. Reed; James C. Kester
son; Richard L. Donaldson
[57] ABSTRACT
Methods of processing pixel data for display on a spatial light modulator (SLM) (15) having staggered pixels. An analog image signal in interlaced field format is sampled to provide staggered pixel data in field format, where pixel values in odd lines are offset from pixel values in even lines. This staggered pixel data may be converted to progressive scan frame format using special calculations to accommodate the line-to-line offset of the pixels (FIGS. 2-6). Vertical scaling may also be performed, either before or after the data is converted to frame format (FIGS. 7 and 8).
10 Claims, 3 Drawing Sheets
