[특허]Visual display having see-through function and stacked liquid crystal shutters of opposite viewing angle directions

Visual display having see-through function and stacked liquid crystal shutters of opposite viewing angle directions 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G02B-027/02 G02F-001/1347
출원번호	US-0067130 (1993-05-26)
우선권정보	JP-0133854 (1992-05-26); JP-0267505 (1992-10-06); JP-0346087 (1992-12-25); JP-0346089 (1992-12-25); JP-0010163 U (1993-03-10); JP-0014401 U (1993-03-26)
발명자 / 주소	Okamura Toshiro (Tokyo JPX) Tabata Seiichiro (Tokyo JPX) Shimada Naoto (Tokyo JPX) Kuba Keiichi (Tokyo JPX) Yasugaki Masato (Tokyo JPX) Iba Yoichi (Tokyo JPX) Tochigi Akiyoshi (Tokyo JPX)
출원인 / 주소	Olympus Optical Co., Ltd. (Tokyo JPX 03)
인용정보	피인용 횟수 : 86 인용 특허 : 0

초록 ▼

A head-mounted see-through display which enables an outside image and an electronic image to be selectively observed by making a liquid crystal shutter transparent or opaque. To eliminate the problem that during the observation of the electronic image the outside image is undesirably seen through the peripheral region of the electronic image, display light from a two-dimensional display device (11) is first transmitted by a half-mirror (12), and the transmitted light is reflected by a concave mirror (13). Then, the reflected light is reflected by the half-mirror (12) so as to be led to the observer\s eye as an enlarged image. To prevent the outside light from entering the eye through the half-mirror (12) during the observation of the electronic image, a negative or positive type TN or STN liquid crystal shutter (10) is disposed in front of the half-mirror (12). When the electronic image is to be viewed, the shutter (10) is made opaque, whereas, when the outside image is to be viewed, the shutter (10) is made transparent.

대표청구항 ▼

A display apparatus adapted to be mounted on an individual\s head and including a device for displaying an image, an ocular optical system for projecting the image displayed by said image display device towards at least one eye of the individual, and a liquid crystal shutter unit for selectively transmitting and intercepting an outside image in its path toward the observer\s eye to enable said outside image to be selectively observed, wherein the improvement comprises said liquid crystal shutter unit having at least two liquid crystal shutters, each including two polarizing plates and a liquid crystal molecular layer provided therebetween, and each having a viewing angle direction defined by a direction in which a highest degree of viewing contrast is obtained, said at least two liquid crystal shutters being stacked one on top of another such that the viewing angle direction of one of said at least two liquid crystal shutters and the viewing angle direction of another of said at least two liquid crystal shutters are rotated relative to each other through approximately 180°in respective planes of said liquid crystal shutters so as to be opposite to each other.

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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
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연합인증

Visual display having see-through function and stacked liquid crystal shutters of opposite viewing angle directions 원문보기

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Visual display having see-through function and stacked liquid crystal shutters of opposite viewing angle directions 원문보기

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대표청구항 ▼

연구과제 타임라인

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