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:
Nov. 12, 2002
Filed:
Sep. 12, 2001
Jong Su Yi, Suwon-Shi, KR;
Dong Ha Kim, Suwon-Shi, KR;
Yong Sik Moon, Seoul, KR;
Kwang Joe Jeon, Suwon-Shi, KR;
Jong Myung Park, Anyang-Shi, KR;
Hark Lim Choi, Suwon-Shi, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, KR;
Abstract
Disclosed is an apparatus for projection display using reflection type LCDs. The apparatus for projection display using reflection type LCDs according to the invention comprises an illuminating device including a lamp and a polarizing element for illuminating S wave or P wave, a color splitter/synthesizer, including the reflection type LCDs for providing an image corresponding to an inputted image and converting a polarizing state of incident light when reflecting the light, a retarder stack for differentiating the polarized state of a predetermined color from the incident light, and polarizing beam splitters composed of a material having a photoelastic constant less than 0.03×10 mm /N at a wavelength of 589.3 nm and a minimum transmittance higher than 90% in transmitting the thickness of 25 mm at a wavelength ranged 0.42 &mgr;m-0.70 &mgr;m for performing color split, color synthesis and analysis, and a projector for projecting the image passed through the color splitter/synthesizer onto a screen.