| 摘要 |
An exemplary light guide plate ( 23 ) has a light incident surface ( 231 ); at least one side surface ( 232 ), the side surface being connected with the light incident surface; a light emitting surface ( 233 ) , orthogonal connected with the side surface and the light incident surface; and a bottom surface ( 234 ) opposite to the light emitting surface. At least one of the light emitting surface and the bottom surface has a plurality of protrusions ( 235 ) spaced a predetermined distance, each protrusion having a plurality of grooves ( 2351 ).
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