The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2008
Filed:
Oct. 15, 2004
Mark D. Gehlsen, Eagan, MN (US);
Chingwen Chen, Taoyuan, TW;
Byungsoo Ko, Hwasugn, KR;
Robert M. Emmons, St. Paul, MN (US);
James W. Laumer, White Bear Lake, MN (US);
Ryan T. Fabick, St. Paul, MN (US);
Linda M. Rivard, Stillwater, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Youngsoo Park, Suwon, KR;
Chideuk Kim, Sungnam, KR;
James A. Stevenson, St. Paul, MN (US);
Mark D. Gehlsen, Eagan, MN (US);
Chingwen Chen, Taoyuan, TW;
Byungsoo Ko, Hwasugn, KR;
Robert M. Emmons, St. Paul, MN (US);
James W. Laumer, White Bear Lake, MN (US);
Ryan T. Fabick, St. Paul, MN (US);
Linda M. Rivard, Stillwater, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Youngsoo Park, Suwon, KR;
Chideuk Kim, Sungnam, KR;
James A. Stevenson, St. Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
In a directly-illuminated liquid crystal display (LCD), for example an LCD monitor or an LCD-TV, a number of light management layers lie between the light source and the LCD panel to provide bright, uniform illumination. The light management layers, including, for example, a diffuser, a reflective polarizer and a brightness enhancing layer, are contained in a light management unit that is formed from two subassemblies. The two subassemblies each contain a substrate and are attached together so as to leave a gap between the two subassemblies. The diffuser is located in one of the subassemblies, and the other light management layers may be in either of the subassemblies, or may be disposed in the gap between the subassemblies.