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:
Feb. 28, 2012
Filed:
Oct. 31, 2008
Byungsoo Ko, Seoul, KR;
Mark D. Gehlsen, Eagan, MN (US);
Chingwen Chen, Taoyuan, TW;
Robert M. Emmons, St. Paul, MN (US);
James W. Laumer, White Bear Lake, MN (US);
Ji-hyung Kim, Anyang, KR;
Ji-hwa Lee, Suwon, KR;
Kang-il Seo, Suwon, KR;
Ryan T. Fabick, St. Paul, MN (US);
Linda M. Rivard, Stillwater, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Chideuk Kim, Sungnam, KR;
Youngsoo Park, Suwon, KR;
Byungsoo Ko, Seoul, KR;
Mark D. Gehlsen, Eagan, MN (US);
Chingwen Chen, Taoyuan, TW;
Robert M. Emmons, St. Paul, MN (US);
James W. Laumer, White Bear Lake, MN (US);
Ji-Hyung Kim, Anyang, KR;
Ji-Hwa Lee, Suwon, KR;
Kang-il Seo, Suwon, KR;
Ryan T. Fabick, St. Paul, MN (US);
Linda M. Rivard, Stillwater, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Chideuk Kim, Sungnam, KR;
Youngsoo Park, Suwon, KR;
3M Innovative Properties Company, Saint 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 films, including a diffuser layer, lie between the light source and the LCD panel to provide bright, uniform illumination. The diffuser layer is attached to a substrate which is separate from the light source and the LCD panel, or may be attached to either the LCD panel or, when using a two dimensional light source, to the light source. The other light management layers may also be attached to the separate substrate or to the LCD panel or two-dimensional light source. High levels of illumination uniformity at the LCD may be achieved with a uniform (non-patterned) diffuser, even with relatively low levels of diffusion, when the diffuser is used with a brightness enhancing layer.