| US 7,575,360 B2 | ||
| Spread illuminating apparatus | ||
| Yasuo Ohno, Kitasaku-gun (Japan); Katsumi Nagata, Kitasaku-gun (Japan); and Masahisa Nishio, Kitasaku-gun (Japan) | ||
| Assigned to Minebea Co., Ltd., Kitasaku (Japan) | ||
| Filed on Jun. 27, 2007, as Appl. No. 11/819,454. | ||
| Claims priority of application No. 2006-189666 (JP), filed on Jul. 10, 2006. | ||
| Prior Publication US 2008/0007956 A1, Jan. 10, 2008 | ||
| Int. Cl. F21V 7/04 (2006.01) | ||
| U.S. Cl. 362—633 [362/26; 362/27; 362/634; 362/362; 362/600; 362/612; 362/616] | 8 Claims |
| 1. A spread illuminating apparatus comprising:
a point light source;
a light conductor plate having an end surface as a light inlet surface facing the point light source; and
a housing frame to hold the point light source and the light conductor plate, the housing frame comprising an inner frame
member and an outer frame member to house the inner frame member, wherein:
the point light source is disposed at an end wall of the outer frame member;
the light conductor plate is jointed to the inner frame member by a pair of joint mechanisms such that the light inlet surface
of the light conductor plate is positioned inward of a forefront face of the inner frame member so as to provide a clearance
between the point light source and the light inlet surface of the light conductor plate; and
the inner frame member is formed in a substantially square U-shape so as to define an open end.
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