Patent ID: 6494588
Filing Date: 2002-12-17
Classification: G02B

Abstract:
A spread illuminating apparatus in which a bar-like light source comprising a light conductive member made of a transparent material and a spot-like light source disposed on at least one end of the light conductive member and emitting light directly to the light conductive member is disposed close to an end of a transparent substrate of a transparent material, wherein an optical path conversion means is provided on the light conductive member, an optical path conversion plate having a row of prisms as an optical conversion means on a surface thereof opposite to a surface facing the transparent substrate is provided between the light conductive member and the transparent substrate, and the light emitted from the spot-like light source enters the light conductive member, is reflected by the optical path conversion means in a slanted direction so as to go away from the spot-like light source, slantingly exits out the light conductive member, passes through the optical path conversion plate and is made incident on the transparent substrate.