Patent ID: 8388208
Filing Date: 2013-03-05
Classification: G02B

Abstract:
1. A method for uniforming light emitted from a backlight module, the backlight module comprising a light guide plate (LGP), the method comprising: providing a plurality of optical microstructures on the LGP, wherein each of the optical microstructures comprises a plurality of optical sub-microstructures; and providing at least one light source at a light input surface, wherein a distribution intensity of the optical microstructures on the LGP increases as the optical microstructures are farther from the light source along X-axis and Y-axis, a distribution intensity of the optical sub-microstructures on the optical microstructure increases as the optical sub-microstructures are farther from the light source along X-axis and Y-axis, and the optical sub-microstructures vary along Z-axis as the optical sub-microstructures are further from the light source, wherein X-axis is defined along a lateral side of the LGP at which the light input surface is configured, Y-axis is defined along another lateral side of the LGP, and Z-axis is defined as being perpendicular with X-axis and Y-axis.