Patent ID: 7230603

Claim:
An illumination device having a light pipe of a substantially parallel flat-form sheet, of which one surface is an outgoing light surface, and a light source unit is placed along one side edge and opposite both side edges, the device comprising: a light axis of lights unparallel to said outgoing light surface of said light pipe after the lights having entered said light pipe from said light source; a reflection body unit consisting of plural unit reflection bodies divided into m in a vertical direction of said light source unit at an opposite side surface of said outgoing light surface of said light pipe; and a reflection surface existing inside said unit reflection bodies, and reflecting lights which have entered within the reflection body from inside of the light pipe in contacting said light pipe in the outgoing light surface direction of the light pipe, wherein said reflection body unit can contact and separate from the opposite side surface of said outgoing light surface of said light pipe for every said unit reflection bodies, and wherein each unit reflection body composing said unit reflection body is composed of material substantially equal in a refractive index to said light pipe.