COMPACT LIGHTING SYSTEM AND DISPLAY DEVICE

摘要

A compact backlight system for illuminating a display device (12) has a light-emitting panel (1) with a front wall (2) and an opposed rear wall (3) and with edge surfaces (4, 5). At least one of the edge surfaces (4) is light-transmitting. The backlight system has a light source (6) comprising a limited number of LEDs. Light from the light source (6) is coupled into the light-emitting panel (1) via the edge surface that is light-transmitting. According to the invention, the light-emitting panel (1) is wedge-shaped, and the surface area Si of the light-transmitting edge surface (4) and the surface area Sr of the opposite edge surface (5) fulfill the relation: 1 <(Sr/Si) <10, preferably 1.5 <(Sr/Si) <5. Light travelling for the first time from the light-transmitting edge surface through the light-emitting panel (1) towards the opposite edge surface (5) cannot be coupled out of the light emitting panel (1).