Illumination – Light source and modifier – With ventilating – cooling or heat insulating means
Patent
1997-09-30
1999-11-30
Sember, Thomas M.
Illumination
Light source and modifier
With ventilating, cooling or heat insulating means
362218, 362245, 362345, 362348, 362373, 362352, F21S 300, F21V 2900
Patent
active
059930276
ABSTRACT:
As regards a surface light source device for use with back-light or the like of a transmissive display panel, the efficiency of the cooling structure for the device will be improved and dust and dirt will be prevented from adhering.The surface light source device has a housing, a diffuser panel, a reflective plate, lamps, and an electric circuit portion. The housing has a window portion located ahead, a base portion located behind and side portions forming a flat space by connecting the two. The diffuser panel is mounted to the window portion of the housing. The reflective plate is supported by the side portions and partitions the flat space into a closed space ahead and an open space behind to be interposed therebetween. The lamps are housed in the closed space, and are positioned right above the reflective plate and right under the diffuser panel to radiate light toward the diffuser panel. The electric circuit portion is housed in the open space, and is electrically connected to the lamps to light them up. On the side portions of the housing, there are formed openings, through which cooling air supplied from outside is introduced into the open space to diffuse heat accumulated within the housing.
REFERENCES:
patent: 4833571 (1989-05-01), Granovksy
patent: 5276599 (1994-01-01), Neeley
patent: 5353133 (1994-10-01), Bernkopf
patent: 5536998 (1996-07-01), Sica
patent: 5871273 (1999-02-01), Shaw
Omori Takayoshi
Suzuki Akihiro
Yamamoto Koichi
Yoneya Dai
Honeyman Marshall
Sember Thomas M.
Sony Corporation
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