PANEL LIGHT EMITTING DEVICE

摘要

PURPOSE:To substantially prevent the generation of clogging of a plate and defect such as ink thinning and to stabilize the quality at the time of mass production by providing a diffuse transmission parts with patterns of 20 to 29 line density. CONSTITUTION:The diffuse transmission parts 5 of such gradation to gradually increase the areas thereof the further from a light source 1 are formed on the area surface of a transparent light transmission part 2. The light arriving from a light source 1 at the diffuse transmission parts 5 diffuses there and heads further in the multiple directions of the transparent light transmission part 2 such as the directions apart from the light source 1. The diffuse transmission parts 5 are formed by confining the density to <30 lines in order to improve the yield of printing at this time. The high brightness is obtd. in this way and the unequal brightness is obviated. The fluctuations in the quality are eliminated and the quality at the time of mass production is stabilized.