Patent ID: 8206000

Claim:
A hollow edge-type backlight module, comprising: a light-emitting array comprising a plurality of light-emitting units arranged in rows and columns, wherein each of the light-emitting units has a first reflection structure, a second reflection structure, at least one first light source and at least one second light source, wherein the first reflection structure and the second reflection structure are mutually mirror-reflected in shape; wherein the first reflection structure has a first horizontal surface and a first reflective surface connected to the first horizontal surface, and there is a first angle between the first reflective surface and a surface extended from the first horizontal surface, and the first light source is disposed adjacent to the first horizontal surface; and the second reflection structure has a second horizontal surface and a second reflective surface connected to the second horizontal surface, and there is a second angle included between the second reflective surface and a surface extended from the second horizontal surface, and the second reflective surface is connected to the first reflective surface, and the second light source is disposed adjacent to the second horizontal surface, wherein the first reflective surface, the second reflective surface and extensions of the first horizontal surface and the second horizontal surface form a space, and the space has a triangular cross-section; and a diffuser disposed above the light-emitting array, wherein the diffuser has contacts with the first reflective surface and the second reflective surface, and the diffuser, the first light source, the first horizontal surface and the first reflective surface define a first air cavity, and the diffuser, the second light source, the second horizontal surface and the second reflective surface define a second air cavity, and the space is located between the first air cavity and the second air cavity.