(12) United States Patent ao) Patent No.: us 6,412,972 Bi
Pujol et al. (45) Date of Patent: Jul. 2,2002
(54) DIGITAL LIGHT PROTECTION APPARATUS WITH DIGITAL MICROMIRROR DEVICE AND ROTATABLE HOUSING
(75) Inventors: Roger A. Pujol, Mohegan Lake;
Thomas P. Tyler, Wallkill, both of NY
(US)
(73) Assignee: Altman Stage Lighting Company,
Yonkers, NY (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/458,603
(22) Filed: Dec. 10, 1999
(51) Int. CI.7 F21V 21/28
(52) U.S. CI 362/272; 362/269; 359/292;
352/198
(58) Field of Search 362/269-274,
362/277, 280-284, 287, 322-324; 359/244, 245, 240, 238, 290-292, 298, 299, 839, 846, 855; 352/40-42, 198, 202, 232; 353/81,
84
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