Lighting system and display device
AssigneeSharp Kabushiki Kaisha
InventorsRyuzo Yuki, Takeshi Ishida
Life of this patent
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Abstract
A plurality of prisms 23e which make an input angle of light from an LED 21 with respect to a rear surface of a light guiding body 23 gradually small are provided on a light emission plane 23b of the light guiding body 23, and a plurality of prisms 24b which cause the light from the LED 21 to be totally reflected to front in an interface between a rear surface of a low refractive index layer 24 and an air layer are provided on the rear surface of the light guiding plate 22. The light guiding plate 22 further includes an inclined plane 30 which is inclined to an optical axis O of the light from the LED 21. The inclined plane 30 is configured so as to cause input light to be reflected in the direction which is close to the optical axis O.
Claims10
A lighting system comprising:
- a light source;
- and
- a light guiding member for guiding light from the lighting source,
- wherein the light guiding member includes a light guiding body to which light from the light source is input, a low refractive index layer which is provided on a rear surface of the light guiding body without an air layer, and of which a refractive index is lower than that of the light guiding body, and an inclined plane which is inclined to an optical axis of the light from the light source,
- wherein a plurality of first reflecting units which make an input angle of the light from the light source with respect to the rear surface of the light guiding body gradually small are provided on a front face side, or the rear surface of the light guiding body,
- wherein a plurality of second reflecting units which cause the light from the light source to be totally reflected forward in an interface between the rear surface of the light guiding member and an air layer are provided on the rear surface of the light guiding member, and
- wherein the inclined plane causes the input light to be reflected in a direction which is close to an optical axis.
Dependencies are inferred from the claim text.