Compound diffusion plate structure, backlight module, and liquid crystal display

A backlight module, comprising:

• a reflection unit, which has a reflection plate, an installation space formed by the surrounding reflection plate, and a reflection coating formed on the internal surface of the reflection plate;
• a light emitting unit, which has a plurality of light emitting components installed within the installation space, wherein light-emitting unit generates a first optical path and a second optical path;
• and
• a compound diffusion plate structure, which is installed beside the light emitting unit, wherein the compound diffusion plate structure comprises:
• a body unit, which has a light entrance plane and a light exit plane;
• a plurality of convex lens units having a plurality of first structures and second structures, wherein the first structures and the second structures are arranged on the light entrance plane, the first structures are adjacent to each other, every two second structures are separated from each other by a predetermined gap, and the first structures correspond to the light-emitting unit;
• and
• a micro structure lens diffusion unit arranged on the light exit plane;
• wherein when one part of the first optical path passes through the first structures, the one part of the first optical path is refracted by the first structures and the body unit and is transmitted to the micro structure lens diffusion unit to generate divergence;
• wherein when the second optical path passes through the second structures, the second optical path is refracted by the second structures and the body unit and is transmitted to the micro structure lens diffusion unit to generate divergence.

A liquid crystal display, comprising:

• a liquid crystal display panel;
• a backlight module, which is installed under the liquid crystal display panel to provide the required light source for the liquid crystal display panel, wherein the backlight module comprises:
• a reflection unit, which consists of a reflection plate, an installation space formed by the surrounding reflection plate, and a reflection coating formed on the internal surface of the reflection plate;
• and
• a light emitting unit, which has a plurality of light emitting components installed within the installation space, wherein light-emitting unit generates a first optical path and a second optical path;
• and
• a compound diffusion plate structure, which is installed beside the light emitting unit, wherein the compound diffusion plate structure comprises:
• a body unit, which has a light entrance plane and a light exit plane;
• a plurality of convex lens units having a plurality of first structures and second structures, wherein the first structures and the second structures are arranged on the light entrance plane, the first structures are adjacent to each other, every two second structures are separated from each other by a predetermined gap, and the first structures correspond to the light-emitting unit;
• and
• a micro structure lens diffusion unit arranged on the light exit plane;
• wherein when one part of the first optical path passes through the first structures, the one part of the first optical path is refracted by the first structures and the body unit and is transmitted to the micro structure lens diffusion unit to generate divergence;
• wherein when the second optical path passes through the second structures, the second optical path is refracted by the second structures and the body unit and is transmitted to the micro structure lens diffusion unit to generate divergence.