| 摘要 |
A backlight module ( 1 ) includes a light source ( 121 ), a light guide plate ( 122 ) and a grating plate ( 123 ). The light guide plate includes a light incident surface ( 1221 ), a bottom surface ( 1223 ) adjacent the light incident surface. The light source is provided adjacent to the light incident surface of the light guide plate. The grating plate is provided adjacent to the bottom surface of the light guide plate. The grating plate is configured for reflecting light beams and polarizing the light beams.
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