Backlight and frontlight, intermediate light guide, cover...

Details Backlight and frontlight, intermediate light guide, cover... Backlight and frontlight, intermediate light guide, cover...

2007-04-17

2007-04-17

Schechter, Andrew (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C349S062000, C349S065000, C362S616000, C362S626000

Reexamination Certificate

active

10375830

ABSTRACT:
A backlight is disposed on a rear surface side of a subject to be irradiated and illuminates the subject to be irradiated from the rear surface side. The backlight includes: a light guide plate; an intermediate light guide disposed along an end surface on one side of the light guide plate; and a light source disposed to an end portion of the intermediate light guide. One surface side of the light guide plate is formed into a reflection surface on which a concavoconvex shape is formed so as to reflect light propagating inside thereof. The other surface side of the light guide plate is formed into an exit surface that outputs the light reflected by the reflection surface. The reflection surface includes a plurality of grooves that are formed of a gentle slope portion and a steep slope portion. The subject to be irradiated is disposed outside of the exit surface.

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