BACKLIGHT MODULE AND LIQUID CRYSTAL DISPLAY DEVICE USING SAME

摘要

A backlight module includes a number of laser units, a number of diffraction units, and a number of diverging units. Each laser unit includes three colored lasers arranged in a first straight line. The three lasers respectively emit red, green, and blue light. Each of the diffraction units includes three diffraction elements. The three diffraction elements are configured to diffract the light along the first straight line. Each of the diverging units is substantially an elongated semi-cylinder, and the longitudinal direction is along the first straight line. The diverging units diffract the three colors of light along a direction which is perpendicular to the direction of the first straight line.

主权项

1. A backlight module, comprising:
a laser unit, comprising:
a first laser light source emitting a red laser light;a second laser light source emitting a green laser light;a third laser light source emitting a blue laser light;wherein the first laser light source, the second laser light source, and the third laser light source are arranged along a straight line in a first direction; a diffraction unit corresponding to the laser unit, which is positioned at the output light path of the laser unit, the diffraction unit comprising
a first diffraction element that is corresponding to the first laser light source and is configured to diffract said red laser light from a point laser light source to a linear laser light source with a linear optical distribution;a second diffraction element that is corresponding to the second laser light source and is configured to diffract said green laser light from a point laser light source to a linear laser light source with a linear optical distribution;a third diffraction element that is corresponding to the third laser light source and is configured to diffract said blue laser light from a point laser light source to a linear laser light source with a linear optical distribution; and a diverging unit, that is corresponding to the diffraction unit and is substantially an elongated semi-cylinder to match the liner optical field distribution, the longitudinal direction of the diverging unit is along the first direction and the diverging unit is configured to diverge the diffracted laser light along a second direction which is perpendicular to the first direction.