[특허]Method for producing high efficiency polarizing filters

Method for producing high efficiency polarizing filters 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G02B-026/00
출원번호	US-0561104 (1990-08-01)
발명자 / 주소	Faris Sades M. (24 Pocantico River Rd. Pleasantville NY 10570)
인용정보	피인용 횟수 : 74 인용 특허 : 0

초록 ▼

The manufacturing cost of color liquid crystal displays depends on improving the yield of making color filter arrays and the polarization efficiency of polarizers to increase the brightnesse, and to reduce the power of the back light. The invention describes a method for combining the filter function, with the polarization function on the same substrate, resulting in improved yield, improved color quality, reduced cost, and increased polarization efficiency, approaching 100% in the transmission mode. The new method comprises a periodic stack of laminates each of which has a reflector layer on one side of a clear glass substrate, and a polarizing filter layer on the other side of the substrate. Each period consists of red, green and blue filters. The laminates are bonded together and sliced at 45 degree angle. Each slice is polished on both sides to obtain an optical finish and thus becomes polarizing filter array for use as the starting material for fabricating liquid crystal displays.

대표청구항 ▼

A method for manufacturing polarizing color filter arrays with high transmission mode polarization efficiency, comprising the following steps: a. providing a plurality of sheets having identical optical properties or having different optical properties but are arranged to repeat periodically in a stack configuration that minimizes material waste in subsequent processing steps, said plurality of sheets are bonded together forming the stack; b. making many slices of thickness ranging from 0.1 mm to 10 mm, by slicing the bonded stack at an angle with respect to the direction of the stack that varies between 10°to 70°depending on the application; and c. polishing both sides of each slice to obtain an optical finish suitable for imagining applications, said polished slices are the desired polarizing filter arrays.

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Method for producing high efficiency polarizing filters 원문보기

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