Light emitting device and backlight module

摘要

A light emitting device includes a laser light source, a converging lens, and a diverging lens. The laser light source is configured to emit combined red, green, and blue laser beams. The combined red, green, and blue laser beams appear to be collimated white light beams. The converging lens is configured to receive the collimated white light beams. The diverging lens faces the converging lens and is configured to diverge the collimated white light beams exiting from the converging lens. A distance between the diverging lens and the converging lens is larger than the focal length of the converging lens.

主权项

1. A light emitting device comprising:
a laser light source configured to emit red, green, and blue laser beams, the red, green, and blue laser beams combining to form a collimated white light beam; a converging lens configured to receive the collimated white light beam; a diverging lens facing the converging lens and configured to diverge the collimated white light beam exiting from the converging lens, and a distance between the diverging lens and the converging lens being larger than the focal length of the converging lens; and a diffusion plate, the diffusion plate and the converging lens positioned at opposite sides of the diverging lens, and the diffusion plate facing the diverging lens.