Patent ID: 9405149
Filing Date: 2016-08-02
CPC Classification: G02B,G02F

Claim Text:
1. A direct backlight module, comprising a backplane that comprises a bottom board and side boards connected to the bottom board, a plurality of light emitting diode (LED) light bars retained on the bottom board of the backplane, a plurality of light guide plates arranged alternate with respect to the LED light bars and set on the bottom board of the backplane, and a diffusion plate mounted on the backplane, wherein each of the light guide plates has two sides at which two positioning plates are respectively mounted, each of the positioning plates comprising a support section that has an end perpendicularly mounted to the bottom board and a retention section extending from a first side surface of the support section that faces the light guide plate and parallel to the bottom board so as to receive the side of the light guide plate therein and securely fix the light guide plate on the bottom board, and wherein two positioning plates are located on opposite sides of each of the LED light bars in such a way that each of the two positioning plates has a second side surface that is opposite to the first side surface and faces the LED light bar, the two second side surfaces of the two positioning plates being opposite to each other and spaced from each other to define therebetween a space for accommodating the LED light bar so that the positioning plates are each located between the LED light bar and one of the light guide plates; wherein at least a portion of the light from the light emitting diode (LED) light bars go directly to the diffusion plate.