Backlight module and liquid crystal display

Abstract

The invention provides a backlight module and a liquid crystal display. The backlight module comprises a light guide plate, and the side edge of the light guide plate is provided with at least one light source. First lenses and second lenses, which are opposite to each other, are arranged between every light source and the light guide plate. Every first lens comprises a first transmissible area at the center and a first reflective area at the edge, and every second lens comprises a second transmissible area at the center and a second reflective area at the edge, the reflective surface of the first reflective area and the reflective surface of the second reflective area are oppositely arranged, the first lens and the second lens are used for enabling part of light emitted by the light sources to sequentially pass through the first transmissible area and the second transmissible area to enter the light guide plate, and part of light emitted by the light sources passes through the first transmissible area and then shines to the second reflective area, and is sequentially reflected by the second reflective area and the first reflective area and then passes through the second transmissible area to enter the light guide plate. Accordingly, the utilization rate of light energy emitted by the light sources is improved.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a backlight module and a liquid crystal display. Background technique [0002] Liquid crystal display (Liquid Crystal Display, hereinafter referred to as: LCD) Since the liquid crystal itself does not emit light, an external light source needs to be installed in the LCD, and the light emitted by the external light source is transmitted or reflected on the liquid crystal layer to display images. [0003] The backlight module is the main component of the LCD. According to the position of the light source, the backlight module can be divided into an edge-type backlight module and a direct-type backlight module. The edge-lit backlight module includes: a light guide plate, a light source located on the side of the light guide plate, a bottom reflection plate located below the light guide plate, and a light-emitting optical film group located above the light guide plate. The light ...

AI Technical Summary

Problems solved by technology

[0004] However, if figure 1 As shown, in the existing edge-lit backlight module, among the light emitted by the light source 1, only the light with an angle within the range of θ can irradiate the light guide plate 2 and thus enter the light guide plate 2, while the light with an angle greater than θ can only irradiate to the top or bottom of the light guide plate 2, so it cannot enter the light guide plate 2 and be wasted, and the utilization rate of light energy is not high

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