Patent ID: 8836894
Filing Date: 2014-09-16
Classification: G02B,G02F

Abstract:
1. A backlight unit used for liquid crystal display devices, wherein, comprising: a light guide plate, provided with a light-outgoing top surface and an incident side adjacent to the light-outgoing top surface; an optical diaphragm, arranged at outer side of the light-outgoing top surface; a reflecting plate, arranged at a top surface of the light guide plate contrary to the light-outgoing top surface; and a light source assembly, arranged at a side of the incident side; the light source assembly comprises: a substrate, arranged at a side of the incident side; light sources, installed on the substrate, its light-outgoing direction being opposite to the incident side; and a cooling plate, connected closely to a side of the substrate contrary to the light source; wherein the substrate or cooling plate is bent at its side close to the light-outgoing top surface to form a first bent portion, which is provided on its surface close to the light source with a first reflecting surface.