| 摘要 |
An exemplary backlight module ( 20 ) includes a light guide plate ( 21 ), a plurality of point light sources ( 22 ), and a transparent light diffusing element ( 23 ). The light guide plate includes a light incident surface ( 211 ). The point light sources are positioned adjacent to the light incident surface. The light diffusing element is positioned between the point light sources and has a light incident surface. The light diffusing element includes a plurality of recesses ( 231 ) which face the light incident surface and correspond to the point light sources. The light diffusing element can diffuse light from the point light sources, therefore increasing emitting angles of the point light sources. The recesses of the light diffusing element can make light from the point light sources more uniform.
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