COMPACT LIGHTING SYSTEM AND DISPLAY DEVICE

摘要

A compact backlight system has a light-emitting panel ( 1 ) with a front wall ( 2 ), a rear wall ( 3 ) situated opposite thereto, and furthermore, between the front and the rear wall ( 2, 3 ), a translucent input edge surface ( 4 ) for coupling light into the light-emitting panel ( 1 ). A light source ( 6, 6 ', . . . ) is associated with the input edge surface ( 4 ). According to the invention, the rear wall ( 3 ) in a first portion ( 12 ) of the light-emitting panel ( 1 ) is provided with a multiplicity of steps ( 13, 13 ', . . . ), and a second portion ( 22 ) of the light-emitting panel ( 1 ) widens from the input edge surface ( 4 ) in a direction facing the first portion ( 12 ). Preferably, a surface ( 17 ) of the steps ( 13, 13 ', . . . ) facing the input edge surface ( 4 ) makes an angle beta_av>=5° (with respect to a normal on a bisecting plane ( 20 ) bisecting the light-emitting panel ( 1 ).