[특허]Polymer dispersed liquid crystal panel with diffraction grating

Polymer dispersed liquid crystal panel with diffraction grating 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G02F-001/137 G02F-001/13
출원번호	US-0896967 (1992-06-11)
우선권정보	JP-0139113 (1991-06-11); JP-0139114 (1991-06-11); JP-0245601 (1991-09-25); JP-0249012 (1991-09-27); JP-0249016 (1991-09-27); JP-0249020 (1991-09-27)
발명자 / 주소	Omae Hideki (Suita JPX) Takahara Hirosi (Neyagawa JPX) Tanaka Takaaki (Katano JPX)
출원인 / 주소	Matsushita Electric Industrial Co., Ltd. (Osaka JPX 03)
인용정보	피인용 횟수 : 130 인용 특허 : 0

초록 ▼

A layer having an irregular sectional surface is formed on the surface of at least one of a pixel electrode and confronting electrode of a liquid crystal layer so as to confront a liquid crystal layer. The liquid crystal layer is formed of a polymer dispersed liquid crystal. If the layer having an irregular sectional surface is formed in a convex and concave pattern regularly and cyclically, the thus formed layer serves as a diffraction grating. When the liquid crystal is in an OFF condition, the refractive index n of the diffraction grating is different from the refractive index of the liquid crystal layer. As a result, an incident light to the liquid crystal panel is scattered and at the same time, diffracted. When the liquid crystal in in an ON condition, there is no difference in the refractive index between the diffraction grating and the liquid crystal, and the incident light passes straight through. Using the liquid crystal panel as a light valve, the light from a light source is incident to the liquid crystal panel, and the image formed on the liquid crystal panel is projected through a projection lens onto a screen. In the case of a black display, the incident light is scattered or diffracted in the liquid crystal panel according to the projected image. The scattered or diffracted light is stopped by a light shielding part of a aperture, and thus does not arrive at the screen.

대표청구항 ▼

A liquid crystal panel comprising: a first substrate and a second substrate which confront each other, at least one of said substrates being light transmissible; electrode layers respectively formed on confronting surfaces of said first and second substrates; a polymer dispersed liquid crystal layer sandwiched between said first and second substrates and comprising a polymer and a liquid crystal material dispersed in said polymer; and an irregular surface layer having an array of microlenses formed on a surface of an electrode provided on at least one of said first and second substrates; wherein a difference between a refractive index np of said polymer and a refractive index nt of said irregular surface layer is 0.1 or less; wherein the irregular sectional surface and polymer dispersed liquid crystal cooperate to form a diffraction grating when the polymer dispersed liquid crystal is in a scattering state and no diffraction grating when the liquid crystal is in a transmissive state.

이 특허를 인용한 특허 (130)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
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Polymer dispersed liquid crystal panel with diffraction grating 원문보기

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Polymer dispersed liquid crystal panel with diffraction grating 원문보기

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