Patent ID: 8974104
Filing Date: 2015-03-10
Classification: G02B,G02F

Abstract:
1. A backlight module, comprising: a light guide plate, comprising: a light emitting surface; a bottom surface opposite to the light emitting surface; a light-incident surface, disposed at a side of the light emitting surface and the bottom surface and distributed along a direction across the light emitting surface and the bottom surface; and a guiding tilt surface, one end of the guiding tilt surface and the light-emitting surface being intersected at a first boundary, and the other end of the guiding tilt surface connecting with a top edge of the light-incident surface, the guiding tilt surface extending toward a direction of protruding the light-emitting surface, and a horizontal distance between the first boundary and the light-incident surface being a first length; at least one light source, disposed corresponding to the light incident end, the light source having a light source surface, and a projection surface of the light source surface on the plane of the light-incident surface being covered by the light-incident surface; and a light-reflecting plate, disposed under the bottom surface of the light guide plate, and the light-reflecting plate having an end near the light-incident surface; wherein when the horizontal distance between the end of the light-reflecting plate and the light-incident surface is smaller than the first length, the horizontal distance between a vertical projection of the end of the light-reflecting plate on the plane of the light emitting surface and the first boundary is a first offset, when the horizontal distance between the end of the light-reflecting plate and the light-incident surface is larger than the first length, the horizontal distance between the vertical projection of the end of the light-reflecting plate on the plane of the light emitting surface and the first boundary is a second offset, the first offset is not larger than 0.5 mm, and the second offset is at least 0.5 mm, when the horizontal distance between the end of the light-reflecting plate and the light-incident surface is the same as the first length, the horizontal distance between the vertical projection of the end of the light-reflecting plate on the plane of the light emitting surface and the first boundary is zero.