Spread illumnating apparatus
AssigneeMinebea Co., Ltd.
InventorDaisuke NAKAYAMA
Life of this patent
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Abstract
Light that enters from an incident light surface of a light guide plate includes not only light which is guided toward the forward direction in front but also light whose optical path is modified by optical elements while progressing through the inside of the light guide plate, and thus wasteful emission from an emitting surface is inhibited. Lights are guided in a longitudinal direction of the optical elements. Light is diffused in the course over which the lights are guided and the region to which they are guided. The lights are guided by the optical elements in the longitudinal direction of the optical elements, and thereby light diffusivity is exhibited in the region in which the optical elements are provided while controlling the directivity of the light.
Claims10
A spread illuminating apparatus comprising:
- a plurality of light sources, and
- a light guide plate including an incident light surface at which the plurality of light sources are disposed and a principal surface adjacent to the incident light surface,
- wherein a plurality of optical elements formed linearly are provided in a predetermined region of the principal surface of the light guide plate adjacent to the incident light surface,
- each of the plurality of optical elements has a concave/convex shaped part in which concave parts and/or convex parts are repeatedly aligned in a longitudinal direction of the optical elements, and
- the plurality of optical elements are disposed so as to extend from the front of the plurality of light sources toward the forward direction in front of an adjacent light source(s).
Dependencies are inferred from the claim text.