| 摘要 |
An exemplary optical plate ( 20 ) includes a transparent plate ( 21 ) and a light diffusion layer ( 22 ). The transparent plate includes a light output surface ( 212 ), a light input surface ( 211 ) opposite to the light output surface, and a plurality of elongated recessed portions ( 213 ) formed at the light input surface. The light diffusion layer is coated in the elongated recessed portions. The light diffusion layer and the light input surface cooperatively define a flat surface. A backlight module using the present optical plate is also provided. The present backlight module using the optical plate can have a thin body with a good optical performance.
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