Prism sheet, illuminating device, surface emitting device, and liquid crystal display device
First Claim
1. A prism sheet in which a plurality of rib-shaped light refracting portions each having a refractive surface and a reflective surface are consecutively provided on an incident surface of a transparent sheet, and an emission surface opposite to the incident surface is a flat surface, wherein light obliquely incident on the transparent sheet is introduced into the transparent sheet by the refractive surface of each light refracting portion, and wherein the incident light is reflected from the reflective surface inside the transparent sheet and is then emitted from the emission surface of the transparent sheet.
1 Assignment
0 Petitions
Accused Products
Abstract
A surface emitting device includes a light guiding plate, a light source, and a prism sheet. The light guiding plate is provided with prism portions each having a slight inclined plane and a steep inclined plane arranged closer to one edge than the slight inclined plane. A plurality of light refracting portions each having a refractive surface and a reflective surface are provided on an incident surface of the prism sheet. Light introduced into the light guiding plate from the light source is emitted from the slight inclined plane and is then incident on the light refracting portion. The light is introduced into the prism sheet by the refracting surface and is then reflected from the reflective surface to be emitted.
14 Citations
28 Claims
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1. A prism sheet in which a plurality of rib-shaped light refracting portions each having a refractive surface and a reflective surface are consecutively provided on an incident surface of a transparent sheet, and an emission surface opposite to the incident surface is a flat surface,
wherein light obliquely incident on the transparent sheet is introduced into the transparent sheet by the refractive surface of each light refracting portion, and wherein the incident light is reflected from the reflective surface inside the transparent sheet and is then emitted from the emission surface of the transparent sheet.
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6. An illuminating device comprising:
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a light guiding plate; and
a light source arranged in the vicinity of one edge of the light guiding plate, wherein a plurality of rib-shaped prism portions each having a slight inclined plane and a steep inclined plane arranged closer to the one edge than the slight inclined plane are consecutively provided on one surface of the light guiding plate orthogonal to the one edge, and wherein light emitted from the light source is introduced into the light guiding plate through the one edge. - View Dependent Claims (7, 8, 9, 10, 21, 22, 23)
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11. A surface emitting device comprising:
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a light guiding plate;
a light source arranged in the vicinity of one edge of the light guiding plate; and
a prism sheet composed of a transparent sheet and arranged on one surface of the light guiding plate orthogonal to the one edge, wherein a plurality of rib-shaped prism portions each having a slight inclined plane and a steep inclined plane arranged closer to the one edge than the slight inclined plane are consecutively provided on at least one of the one surface and an opposing surface of the light guiding plate opposing the one surface, wherein a plurality of rib-shaped light refracting portions each having a refractive surface and a reflecting surface are consecutively provided on an incident surface of the prism sheet facing the light guiding plate, an emission surface opposite to the incident surface is a flat surface, and the prism sheet is arranged on the light guiding plate with the refractive surfaces facing the light source, and wherein light introduced into the light guiding plate from the light source through the one edge is emitted from the slight inclined plane and is then incident on the light refracting portion, and the light incident on the light refracting portion is introduced into the transparent sheet by the refractive surface and is then refracted from the reflective surface in the transparent sheet to be emitted from the emission surface. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 24, 25, 26, 27, 28)
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Specification