Prism sheet, illuminating device, surface emitting device,...

Details Prism sheet, illuminating device, surface emitting device,... Prism sheet, illuminating device, surface emitting device,...

2007-04-03

2007-04-03

Harrington, Alicia (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

C359S626000, C359S627000, C359S638000, C359S640000

Reexamination Certificate

active

10999588

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.

REFERENCES:
patent: 6222689 (2001-04-01), Higuchi et al.
patent: 2003/0169586 (2003-09-01), Miyashita et al.
patent: 2004/0061812 (2004-04-01), Maeda
patent: H2-84618 (1990-03-01), None
patent: 2003177406 (2003-06-01), None

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