Backlight module and liquid crystal display device

摘要

The present invention relates to a backlight module and a liquid crystal display (LCD) device, and the backlight module comprises: a back plate disposed at the bottom of the backlight module; light emitting diode (LED) light sources disposed on the back plate; and a diffusion plate disposed on a light output surface of the backlight module. There are different distances between the LED light sources disposed in different areas of the back plate and the diffusion plate. By adopting different height of LED light sources in different areas of the back plate, the display quality of the backlight module and the LCD device according to the present invention can be increased.

主权项

1. A backlight module, comprising:
a back plate disposed at the bottom of the backlight module; at least two light emitting diode (LED) light sources disposed on the back plate; and a diffusion plate disposed on a light output surface of the backlight module; wherein there are different distances between the LED light sources disposed in different areas of the back plate and the diffusion plate, and a distribution density of the LED light sources in different areas of the back plate is different, and the distribution density of the LED light source is changed to improve “Mura” phenomenon; wherein the distance between the LED light sources in a center area of back plate and the diffusion plate is shorter than the distance between the LED light sources in side edge areas of the back plate and the diffusion plate; wherein the distribution density of the LED light sources in a center area of the back plate is greater than the distribution density of the LED light sources in the side edge areas of the back plate; and wherein a cross-sectional shape of the back plate is step-shaped, and the number of steps of the cross-sectional shape is greater than one.