Patent ID: 9583048
Date: 2017-02-28
CPC Classifications: G02B,G09G

Claim:
1. A backlight module including at least one light source and a light guide plate, wherein a lower surface of the light guide plate includes at least one V-shaped groove configured to reflect a light ray, which is incident onto the lower surface of the light guide plate from sides of the light guide plate, onto an upper surface of the light guide plate by sides of the at least one V-shaped groove, the reflected light ray leaving the light guide plate from the upper surface thereof; wherein the angles between the two sides of the V-shaped groove of the light guide plate and the lower surface of the light guide plate are in a range of 10°-80°; and wherein the light guide plate further comprises a first concave lens/first concave lenses provided at one side/two sides thereof and configured to convert substantially all of a convergent light ray from the at least one light source, which enters the light guide plate from the one side/two sides of the light guide plate, into a mutually parallel light ray to be incident onto the lower surface of the light guide plate.