Patent ID: 8593587

Claim:
A liquid crystal display module comprising a liquid crystal panel and a back plate, characterized in that: said liquid crystal display module comprises a multi-level light guide plate located between the liquid crystal panel and the back plate; said multi-level light guide plate is divided into multiple sections sequentially connected with each other in a direction, and at least one light bar is disposed at an outward side of each section of said multiple sections; and a bottom surface of any section of the multiple sections has a plurality of grooves parallel to each other, which further divide the section into multiple sub-sections, an edge light incident side of each sub-section corresponds to a portion of LEDs connected in series in the light bar and a reflective film or reflective coating is adhered on a wall of each of the grooves at an interface between every two sub-sections to prevent light rays of one sub-section from entering another so that brightness of the sub-sections is individually controlled, said grooves extending in a direction perpendicular to a direction that the light bar of the section is disposed, wherein sections relatively located in a middle position of said multi-level light guide plate and the light bars thereof are on a relatively lower level, while sections relatively located at outward sides of said multi-level light guide plate and the light bars thereof are on another relatively higher level; and wherein said back plate is a ladder-like back plate which matches a bottom surface of said multi-level light guide plate for bearing the multiple sections relatively located in the middle position and outward sides of the multi-level light guide plate; a reflective film or reflective coating is provided between each two adjacent sections; two adjacent sections located on different levels have a portion where they overlap with each other so that the relatively lower section defines a mixed-light region in the overlapping portion.