Light controlling sheet and surface light source device

Details Light controlling sheet and surface light source device Light controlling sheet and surface light source device

2006-09-18

2009-12-08

Payne, Sharon E (Department: 2875)

Illumination

Display backlight

C362S330000, C362S561000, C362S606000, C362S619000, C385S012000, C385S032000, C385S033000, C385S074000, C385S129000

Reexamination Certificate

active

07628502

ABSTRACT:
A light controlling sheet is provided in a surface light source device including a light source portion. The light controlling sheet includes an outgoing light side lens portion having multiple unit lenses arranged to project toward the outgoing light side, and transparent portions and reflecting portions provided on the incident light side. The transparent portions and the reflecting portions are arranged alternately, and the transparent portions comprise 40% to 60% of the total area of the light controlling sheet when viewed form a direction orthogonal to the sheet surface on the incident light side.

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