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:
Dec. 12, 2000
Filed:
Mar. 04, 1999
Ting-Chiang Hsieh, Hsinchu, TW;
Chen-Lung Kuo, Hsinchu, TW;
Industrial Technology Research Institute, Hsin-Chu, TW;
Abstract
Prior art solutions to liquid crystal birefringence (which causes the emergent light to become elliptically polarized) have involved use of a single birefringent layer (macrocompensator) to compensate for this. This approach is only partly successful. The present invention improves the color balance still further by providing a separate set of microcompensators. Two of the color filters share a common microcompensator while a third color filter has its own microcompensator. The color filters are first formed on one of the two substrates' inner surfaces, with the appropriate microcompensators being then formed on the outward looking surface of the other substrate. By this means, a near perfect match between the color distortion introduced by the liquid crystal layer and the phase compensation needed to correct this can be made.