Backlight Module and LCD Display

Abstract

The invention provides a backlight module and a liquid crystal display. The backlight module includes: a light guide plate, at least one light source is provided on the side of the light guide plate; between each light source and the light guide plate are: a first lens and a second lens oppositely arranged; the first lens includes a first lens in the center The light-transmitting area and the first light-reflecting area on the edge, the second lens includes the second light-transmitting area in the center and the second light-reflecting area on the edge; the reflective surfaces of the first light-reflecting area and the second light-reflecting area are oppositely arranged; the first lens and the second light-reflecting area The two lenses are used to make part of the light emitted by the light source pass through the first light-transmitting area and the second light-transmitting area to enter the light guide plate in sequence, and part of the light emitted by the light source passes through the first light-transmitting area and then irradiates to the second light-reflecting area and passes through the second light-transmitting area. The second reflective area and the first reflective area reflect in turn and enter the light guide plate through the second light-transmitting area. Thus, the utilization rate of the light energy emitted by the light source 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) because the liquid crystal itself does not emit light, it is necessary to install an external light source in the LCD, and transmit or reflect the light emitted by the external light source 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 g...

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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