[특허]Backlit display with enhanced viewing properties

Backlit display with enhanced viewing properties 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F21V-013/00
출원번호	US-0130084 (1993-09-30)
발명자 / 주소	Borchardt Jerry L. (Maple Grove MN)
출원인 / 주소	Honeywell Inc. (Minneapolis MN 02)
인용정보	피인용 횟수 : 126 인용 특허 : 0

초록 ▼

A high aspect ratio, backlit liquid crystal display in which light from opposing rows of light emitting diodes is projected into the ends of a thin optical cavity. The optical cavity is bounded by one major wall of which the interior surface is specularly reflective and an opposing major wall including a layer of transparent material having an interior surface formed with an array of regularly spaced, fine, triangular prisms which tend to collimate light received from the cavity and project it outwardly perpendicular to the major wall. A diffusion layer overlays the layer of transparent material, and a brightness enhancing film overlays the diffusion layer and functions to convert diffuse illumination received through the diffusion layer into directed illumination predominantly falling within the a viewing space bounded by predetermined angles.

대표청구항 ▼

A high aspect ratio, backlit display device with enhanced viewing properties, comprising: a message carrying member having a display surface of predetermined length and width of which at least a portion is translucent, said message carrying member having a first side from which the message is to be readable within a viewing space bounded by predetermined angles relative to the first side, said message carrying member having a second side opposite the first side; an optical structure having first and second generally parallel major walls at least partially enclosing a thin cavity having a length and width at least as great as the predetermined length and width of the display surface, the cavity having a first end substantially parallel with the width of the cavity and transverse to the first and second major walls thereof, the first major wall of said optical structure including an inner layer of transparent material having an interior surface bounding the cavity, an intermediate optical diffusion layer and an outer brightness enhancing film layer having an inner surface adjacent the diffusion layer and an outer surface adjacent the display surface, the interior surface of the inner layer and the outer surface of the outer layer each being configured with an array of regularly spaced triangular prisms parallel with the width of the cavity, the second major wall of said optical structure being adapted to provide specular reflection; and a light source adapted to project light from the end of the cavity onto the second major wall of said optical structure in a direction transverse to the triangular prisms on the inner layer at a small angle relative to an interior surface of the second major wall.

이 특허를 인용한 특허 (126)

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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

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Backlit display with enhanced viewing properties 원문보기

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Backlit display with enhanced viewing properties 원문보기

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