[특허]Back lighting device for a panel

[미국특허] Back lighting device for a panel 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F21V-007/04
출원번호	US-0655520 (1991-02-14)
우선권정보	JP-0033813 (1990-02-16); JP-0172809 (1990-07-02)
발명자 / 주소	Kashima Keiji (Kanagawa JPX) Yoshida Naoki (Kanagawa JPX) Shoji Osamu (Tokyo JPX) Yanagi Eiichi (Kanagawa JPX) Fukunishi Takumi (Kanagawa JPX)
출원인 / 주소	Tosoh Corporation (Yamaguchi JPX 03)
인용정보	피인용 횟수 : 68 인용 특허 : 0

초록 ▼

An improved backlighting device for liquid-crystal display panels comprising a linear light source the length of which is equal to or less than the length of an end portion of a light conducting plate at which light is admitted from the linear light source placed adjacent to it, the linear light source being enclosed with a light diffusing reflector that has a slit formed in the surface through which incident light is admitted into the light conducting plate and which is provided in such a way as to form a clearance from the surface of the linear light source, one major surface of the light conducting plate being partially covered with a light diffusing material under specified conditions that has a higher refractive index than the material of which the light conducting plate is made, the major surface being further covered with a specular or light diffusing/reflecting plate, with a plurality of light diffusing plates being provided on the other major (light emerging) surface of the light conducting plate.

대표청구항 ▼

A back lighting device for a liquid-crystal panel comprising: a light conducting plate made of alight-transmissive material; a linear light source provided at an end portion of at least one side of said light conducting plate, at least a portion of said inner light source which is capable of uniform light emission being equal to or less than a length of said end portion, said linear light source being enclosed with a light diffusing reflector having a slit through which light emitted from said linear light source is admitted into one side of the light conducting plate and providing a clearance between an outer surface of the linear light source and an opposing surface of said reflector; a coating of a light diffusing material having a refractive index greater than said light-transmissive material, said coating being provided in a dot pattern on one major surface of said light conducting plate such that an area of coverage (Y) of said coating satisfies the functional relationship Y=aXn or Y=ax or the approximate relationship thereof (where X or x represents the distance from the linear light source; n=1.7-3.5; and a is a constant determined by regression of a mathematical expression) and such that an area of coverage (Y′)of said coating which is provided on said major surface of the light conducting plate in an increasing amount towards both ends of a line parallel to the axis of said linear light source satisfies the functional relationship Y′=a′X′n or Y′=a′x′or the approximate relationship thereof (where X′ or x′represents the distance the coating departs from a line vertical to the center of the linear light source towards both ends thereof; n=1.7-3.5; and a′is a constant determined by regression of a mathematical expression) over the range from the area that is nearest to the linear light source and where X′is at maximum (each end of the light conducting plate) to the area where Y=Y′with Y′decreasing or increasing gradually, and is constant with increasing X along said both ends of the light conducting plate; a specular or light diffusing/replacing plate for covering said coated surface; and at least one light scattering plate provided on the other major and light emerging surface of said light conducting plate.

이 특허를 인용한 특허 (68) 인용/피인용 타임라인 분석

Mahama, Kazutoshi; Hatanaka, Masato, Backlight device and transmission type liquid crystal display apparatus.
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Arai, Takeo, Backlight device, light source device, lens, electronic apparatus and light guide plate.
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Arai, Takeo, Backlight device, light source device, lens, electronic apparatus and light guide plate.
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Arai, Takeo, Backlight device, light source device, lens, electronic apparatus and light guide plate.
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Kashima Keiji,JPX ; Yoshida Naoki,JPX ; Shoji Osamu,JPX ; Yanagi Eiichi,JPX ; Fukunishi Takumi,JPX, Backlighting device.
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Kashima Keiji (Saitama JPX) Yoshida Naoki (Kanagawa JPX), Backlighting device free of a bright line.
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Mullen, Patrick W., Differentially cured materials and process for forming same.
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Mullen,Patrick W., Differentially cured materials and process for forming same.
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Mullen,Patrick W.; Nilsen,Robert B.; Rowland,William P., Differentially-cured materials and process for forming same.
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Parker, Jeffery R.; McCollum, Timothy A.; Ezell, Robert M., Edgelit panel with curvilinear light extracting deformities.
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Matsumoto Iwao (Toyonaka JPX), Illuminating apparatus and a method of manufacturing an edge light conductor for use therein.
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Parker Jeffery R. ; Miller Mark D. ; Kelsch Daniel N., Integrated display panel assemblies.
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McCollum, Timothy A.; Parker, Jeffery R.; Ezell, Robert M., Light emitting panel assemblies.
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McCollum, Timothy A.; Parker, Jeffery R.; Ezell, Robert M., Light emitting panel assemblies.
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McCollum, Timothy A.; Parker, Jeffery R.; Ezell, Robert M., Light emitting panel assemblies.
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McCollum, Timothy A.; Parker, Jeffery R.; Ezell, Robert M., Light emitting panel assemblies.
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McCollum, Timothy A.; Parker, Jeffery R.; Ezell, Robert M., Light emitting panel assemblies.
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McCollum, Timothy A.; Parker, Jeffery R.; Ezell, Robert M., Light emitting panel assemblies.
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McCollum,Timothy A.; Parker,Jeffery R.; Ezell,Robert M., Light emitting panel assemblies.
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Parker Jeffery R. ; Miller Mark D. ; Kelsch Daniel N., Light emitting panel assemblies.
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Parker Jeffery R. ; Miller Mark D. ; Kelsch Daniel N., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R., Light emitting panel assemblies.
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Parker, Jeffery R.; Coghlan, Gregory A.; Ezell, Robert M., Light emitting panel assemblies.
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Parker, Jeffery R.; Coghlan, Gregory A.; Ezell, Robert M., Light emitting panel assemblies.
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Parker, Jeffrey R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R., Light emitting panel assemblies.
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Parker,Jeffery R.; Coghlan,Gregory A.; Ezell,Robert M., Light emitting panel assemblies.
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Parker,Jeffery R.; Coghlan,Gregory A.; Ezell,Robert M., Light emitting panel assemblies.
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Parker,Jeffery R.; Coghlan,Gregory A.; Ezell,Robert M., Light emitting panel assemblies.
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Parker,Jeffery R.; Coghlan,Gregory A.; Ezell,Robert M., Light emitting panel assemblies.
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Parker,Jeffrey R., Light emitting panel assemblies.
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Parker,Jeffrey R.; Coghlan,Gregory A.; Ezell,Robert M., Light emitting panel assemblies.
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Parker, Jeffery R.; Miller, Mark D.; Hough, Thomas A., Light emitting panel assemblies for use in automotive applications and the like.
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Parker,Jeffery R., Light emitting panel assemblies having LEDs of multiple colors.
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Lee,Wan Woo, Light guide plate for liquid crystal display module of car audio in use with the light guide plate.
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Parker, Jeffery R.; McCollum, Timothy A., Light redirecting films having optical elements with curved surfaces.
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Parker, Jeffery R.; McCollum, Timothy A., Light redirecting films including intersecting optical elements with flat and curved surfaces.
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Parker, Jeffery R.; McCollum, Timothy A., Light redirecting films including intersecting optical elements with flat and curved surfaces.
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Parker,Jeffery R.; McCollum,Timothy A., Light redirecting films including non-interlockable optical elements.
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Koike Yasuhiro,JPX, Light scattering guiding light source device and liquid crystal display.
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Nilsen,Robert B., Light-redirecting optical structures.
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Schoniger Karl-Heinz (Barbarossastrasse 40/6 73732 Esslingen DEX), Lighted display board.
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McCollum,Timothy A.; Parker,Jeffery R.; Bourdelais,Robert; Brickey,Cheryl; Brophy,Chris; Lee,Junwon; Sudol,Ronald J., Long curved wedges in an optical film.
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Parker, Jeffery R.; McCollum, Timothy A.; Hide, Fumitomi, Optically transmissive substrates and light emitting assemblies and methods of making same, and methods of displaying images using the optically transmissive substrates and light emitting assemblies.
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Oe Makoto,JPX ; Chiba Issei,JPX, Plane light source unit.
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Oe Makoto,JPX ; Chiba Issei,JPX, Plane light source unit.
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Lien,Yen Po; Chang,Hung Wen, Stepped light guide.
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Yokoyama Kazuaki,JPX, Surface light source device.
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Ishikawa Tsuyoshi,JPX, Surface light source device of side light type having diffusing element with improved distribution pattern of light.
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Parker,Jeffery R.; McCollum,Timothy A., Transreflectors, transreflector systems and displays and methods of making transreflectors.
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[미국특허] Back lighting device for a panel 원문보기