Side incident LED (Light Emitting Diode) light source backlight module

Abstract

The invention provides a side incident LED (Light Emitting Diode) backlight module structure which comprises an LED light-bar light source, a middle frame bracket, an optical sheet, a light guide plate, a reflective sheet, heat radiating fins, a back plate, a mirror reflection bar and a light absorption buffer bar, wherein the mirror reflection bar and the light absorption buffer bar are adhered on the middle frame bracket, the mirror reflection bar corresponds to a gap between the surface of the LED light-bar light source and the incident surface of the light guide plate, and the light absorption buffer bar is located between the optical sheet and the middle frame bracket. When the scheme is adopted, light leaked out of the gap between the surface of an LED lamp and the incident surface of the light guide plate can be reflected back to the light guide plate through the mirror reflection bar, so that light loss is effectively reduced; the light absorption buffer bar absorbs remaining light beams, and prevents the remaining light beams from leaking from the gap between the optical sheet and the middle frame bracket, so that the light leakage phenomenon is improved; and meanwhile, the problems of the light loss and light leakage because an LED light emitting surface is equal to or larger than the incident surface of the light guide plate are solved, and the luminance, the energy efficiency and the luminance uniformity of the backlight module are improved.

Description

technical field [0001] The invention relates to an LED backlight module, in particular to a side-entry LED light source backlight module for a liquid crystal display or a TV. Background technique [0002] With the development of LED lamp technology and customers' demand for thinner and lighter LCD monitors and LCD TVs, the backlight module of side-in LED light source (LED lamp placed on the side of the light guide plate) has become an existing technology in the past two years. The mainstream of technology; the backlight module of the side-in LED light source has the advantages of energy saving, environmental protection, low power consumption, and ultra-thin. [0003] The side-type LED light source is a point light source. In order to turn the point light source into a line light source and a surface light source, the side-type backlight needs to use a light guide plate; the light emitted by the side LED point light source enters the light guide plate through the light incide...

AI Technical Summary

Problems solved by technology

Depend on figure 2 It can be seen that since the vertical light-emitting surface of the LED lamp exceeds the light incident surface of the light guide plate, part of the light will pass from the surface of the LED lamp 1 to the gap 14 between the light incident surface of the light guide plate 4 to between the optical sheet 3 and the middle frame bracket 2 leakage in the gap 123, resulting in light leakage and light loss

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