Patent ID: 9039249
Filing Date: 2015-05-26
Classification: G02B

Abstract:
1. A backlight module, comprising: a laser light source comprising one laser diode or a plurality of laser diodes; a light guiding board located at a side of the laser light source, the light guiding board comprising a light incident face and a light emerging face; and a first lens and a second lens both located at a light path of light beams emitted from the laser light source, the first lens firstly converging and then diverging the light beams emitted from the laser light source, the second lens changing the light beams passed through the first lens to be parallel light beams, the parallel light beams having a larger width than that of the light beams just emitted from the laser light source, the parallel light beams entering the light guiding board via the light incident face of the light guiding board.