Illumination – Light fiber – rod – or pipe – Illuminating or display apparatus
Patent
1998-12-04
2000-07-18
Tso, Laura K.
Illumination
Light fiber, rod, or pipe
Illuminating or display apparatus
362 30, 362 29, G02F 11335
Patent
active
060897392
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: 5070431 (1991-12-01), Kitazawa et al.
patent: 5486983 (1996-01-01), Cordier et al.
patent: 5659376 (1997-08-01), Uehara et al.
patent: 5664873 (1997-09-01), Kanda et al.
patent: 5666172 (1997-09-01), Ida et al.
patent: 5779339 (1998-07-01), Konishi et al.
Omori Takayoshi
Suzuki Akihiro
Yamamoto Koichi
Yoneya Dai
Sony Corporation
Tso Laura K.
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