Backlight module and liquid crystal display using the same

摘要

The present disclosure provides a backlight module. The backlight module includes at least one light tube. Each light tube includes a light emitting side for emitting light and a first micro-structure disposed on the light emitting side for breaking total reflections of the light in the light tube. With the first micro-structure disposed on the light emitting side of the light tube, the total reflections of the light in the light tube can be broken to allow the light to be emitted from the light tube evenly. Also, the reflecting structure is disposed on non-light emitting side for improving the using efficiency of the light and reducing the manufacturing cost of the backlight module. Additionally, the fluorescent layer is coated on the light emitting side for improving a color saturation level of a LCD using the backlight module.

主权项

1. A backlight module comprising a light tube, wherein the light tube comprises a light emitting side for emitting light and a first micro-structure disposed on the light emitting side for breaking total reflections of the light in the light tube; the backlight module further comprises a fluorescence layer coated on a surface of the first micro-structure; the light tube is made of polymethyl methacrylate or silicon dioxide, and the light tube further comprises a non-light emitting side opposite to the light emitting side and a reflecting structure disposed on the non-light emitting side; the light tube further comprises a second micro-structure disposed on the non-light emitting side, the reflecting structure is a reflecting plate or a reflecting film disposed on the second micro-structure; and the second micro-structure comprises a plurality of protrusions protruding from the non-light emitting side and a cross section of each protrusion is hemisphere, rhombic, or semi-oval; wherein the first micro-structure comprises a plurality of grooves defined on the light emitting side and the cross section of each groove is hemisphere, rhombic, or semi-oval;
a cross section of the light tube is circular or elliptical; or the cross section of the light tube is fan shaped, and the light tube comprises an arch surface corresponding to the non-light emitting side and two flat surfaces corresponding to the light emitting surface.