| 摘要 |
A backlight module ( 3 ) includes a light guide plate ( 31 ), a light source ( 32 ) and an optical conversion device ( 33 ). The light guide plate includes an incident surface ( 311 ), an emitting surface ( 312 ) adjacent to the incident surface and a bottom surface ( 313 ) parallel to the emitting surface. The incident surface maintains an oblique angle relative to the bottom surface. The light source is near the incident surface of the light guide plate for radiating light beams toward the light guide plate. The optical conversion device is disposed between the light source and the light incident surface, which is configured for transforming a polarization state of some of the light beams received from the light source such that the transformed light beams can enter the light guide plate through the incident surface.
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