Lens light guide plate and surface light equipment using the same
First Claim
1. A lens light transparent guide plate comprising:
- a light-emerging surface,a light-reflecting surface opposed to the light-emerging surface, anda plurality of side end surfaces adjacent to the light-emerging surface and to the light-reflecting surface, at least one of the side end surfaces comprising a light-entering surface from which light emitted by a linear light source enters,wherein the cross-sectional shape of the lens guide plate, taken along a line connecting the side end surface on the light-source side and the side end surface opposite to the light source has a thickness that becomes smaller as a distance from the side end surface on the light-source side becomes longer, and the light-reflecting surface is curved relative to the light-emerging surface.
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Accused Products
Abstract
A non-light-diffusive light guide plate, the light-diffusing properties being not imparted thereto by means of printing or the like, has a light-emerging surface provided with a condenser lens which is produced by arranging columnar lenses having convex cross-sections so that their ridge lines will be parallel with each other, and, at the same time, vertical to the side end surface, the light-entering surface of the light guide plate. The shape of the cross-section of the light guide plate is such that the thickness becomes smaller as the distance from the side end surface on the light-source side becomes longer and that the inclination of the line corresponding to the light-reflecting surface which is opposed to the light-emerging surface is steeper on the light-source side than on the non-light-source side. A surface light equipment comprises, as a means for raising light which emerges from the light-emerging surface of the light guide plate to the direction of the normal of the light-emerging surface, a lens film on which columnar lenses having triangular cross-sections are arranged so that their ridge lines will be parallel with each other. This lens film is arranged so that the ridge lines of the columnar lenses will be parallel with the side end surface serving as the light-entering surface and that the vertexes of the triangles will face the light guide plate.
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Citations
14 Claims
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1. A lens light transparent guide plate comprising:
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a light-emerging surface, a light-reflecting surface opposed to the light-emerging surface, and a plurality of side end surfaces adjacent to the light-emerging surface and to the light-reflecting surface, at least one of the side end surfaces comprising a light-entering surface from which light emitted by a linear light source enters, wherein the cross-sectional shape of the lens guide plate, taken along a line connecting the side end surface on the light-source side and the side end surface opposite to the light source has a thickness that becomes smaller as a distance from the side end surface on the light-source side becomes longer, and the light-reflecting surface is curved relative to the light-emerging surface. - View Dependent Claims (2, 3, 4, 5, 6, 13)
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7. A surface light equipment, comprising:
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a lens light transparent guide plate, a linear light source provided on the light-entering side of the lens light guide plate, and a lens film provided on the light-emerging surface of the lens light guide plate, wherein the lens light transparent guide plate comprises, a light-emerging surface, a light-reflecting surface opposed to the light-emerging surface, and a plurality of side end surfaces adjacent to the light-emerging surface and to the light-reflecting surface, at least one of the side end surfaces comprising a light-entering surface from which light emitted by the light-source enters, wherein the cross-sectional shape of the lens light guide plate, taken along a line connecting the side end surface on the light source side and the side end surface opposite to the light source has a thickness that becomes smaller as a distance from the side end surface on the light-source side becomes longer, and the light-reflecting surface is curved relative to the light-emerging surface; and the lens film comprising a plurality of columnar lenses having triangular cross-sectional shapes arranged so that their ridge lines are parallel with each other, and provided in a manner that the ridge lines thereof are parallel with the light-entering surface of the light guide plate in order to allow light entering from the light-entering surface of the lens light guide plate to emerge in the direction of the normal of the light-emerging surface so that the vertexes of the triangles face the lens light guide plate. - View Dependent Claims (8, 9, 10, 11, 12, 14)
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Specification