Backlight device, particularly backlight device for head-up display and head-up display for automobile

摘要

The present invention relates to a backlight device (14) for a head-up display, among others. The apparatus comprises at least one light emitting diode (16) emitting a light beam, an optical system (20) for shaping the light beam, and a light diffuser (22) for receiving the shaped light beam, Characterized in that the diffuser further comprises a heat sink (18) formed of at least two parts comprising a base plate (50) and at least one strip (52) attached to the base plate. The strip comprises at least one fold (90) for forming at least one cooling fin (80) and at least one region (60) intended to be in thermal contact with the base plate (50) .