Spread illuminating apparatus with multi-layer light conductive member
First Claim
1. A spread illuminating apparatus of side light type, comprising:
- a transparent substrate made of a light-transmissible material; and
at least one light source which is composed of a bar-like light conductive member and at least one spot-like light source provided at an end of the bar-like light conductive member, and which is provided close to an end surface of the transparent substrate, characterized in that;
the bar-like light conductive member is a multi-layer light conductive member consisting of a plurality of plate-like light conductive members put into lamination, and that;
an optical path conversion means is provided on a surface of each of the plate-like light conductive members constituting the multi-layer light conductive member.
1 Assignment
0 Petitions
Accused Products
Abstract
A spread illuminating apparatus provides uniform illumination and high brightness over a whole screen. A plurality of plate-like light conductive members form a multi-layer light conductive member. An optical path conversion means composed of grooves formed parallel to the thickness direction of each plate-like light conductive member and flat portions is provided on one surface of each of the plate-like light conductive members. Each groove of each plate-like light conductive member overlaps partly with each groove of adjacent plate-like light conductive members thereby constituting each multiple groove. A plurality of multiple grooves of the light conductive member are formed with inclination such that one multiple groove thereof overlaps partly with adjacent multiple grooves with the longitudinal direction of the light conductive member.
28 Citations
9 Claims
-
1. A spread illuminating apparatus of side light type, comprising:
-
a transparent substrate made of a light-transmissible material; and
at least one light source which is composed of a bar-like light conductive member and at least one spot-like light source provided at an end of the bar-like light conductive member, and which is provided close to an end surface of the transparent substrate, characterized in that;
the bar-like light conductive member is a multi-layer light conductive member consisting of a plurality of plate-like light conductive members put into lamination, and that;
an optical path conversion means is provided on a surface of each of the plate-like light conductive members constituting the multi-layer light conductive member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification