Patent ID: 6307648
Filing Date: 2001-10-23
Classification: H04N

Abstract:
A line source unit comprising a cover member, a light guiding member which is independent of said cover member, and which is transparent and is placed within the cover member, and a light source equipped to neighbor both the cover member and the light guiding member, wherein in said line source unit, light emitted by the light source undergoes total reflection to travel through said light guiding member and the light reflected by a light diffusing portion which is formed on the light guiding member is released to outside of the light guiding member via a predetermined facet of the light guiding member, said line source unit including:a first portion of an internal surface of the cover member being in close contact with the light guiding member and extending a predetermined range from said light source, said first portion being constructed to have a light reflection rate smaller than that of a second portion of said internal surface of said cover member excluding the first portion.