Backlight module

Abstract

The invention provides a backlight module. The backlight module comprises a back board, a backlight source, a guide plate, a light guide plate, a reflective piece, an optical membrane set, a rubber frame and a baffle wall, wherein the backlight source is arranged in the back board; the light guide plate is arranged in the back board and is opposite to the backlight source; the reflective piece is arranged between the guide plate and the back board; the optical membrane set is arranged on the guide plate; the rubber frame is arranged on the back board; the baffle wall is arranged between the light guide plate and the rubber frame and is opposite to the backlight source; the trapezoidal baffle wall is provided with a bevel close to the backlight source; the bevel is provided with a reflective layer; and light incident to the baffle wall is reflected to the light guide plate by arranging the baffle wall with the reflective layer in a position opposite to the backlight source between the rubber frame and the light guide plate, so that the light is prevented from being refracted from a gap between the optical membrane set and the light guide plate to form a bright line, thereby the bright line problem of an incident side in a side incident backlight module is solved well. The backlight module provided by the invention has higher light coupling efficiency; and meanwhile, with the adoption of the backlight module, the brightness of the light guide plate is improved, brightness loss of light emitted by an LED (light emitting diode) light source is avoided, and the utilization ratio of the LED light source is improved.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to a backlight module for improving the brightness of a light guide plate. Background technique [0002] Liquid Crystal Display (LCD, Liquid Crystal Display) has many advantages such as thin body, power saving, no radiation, etc., and has been widely used. Most of the liquid crystal display devices on the current market are backlight type liquid crystal display devices, which include a liquid crystal panel and a backlight module. The working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates. The direction of the liquid crystal molecules is controlled by whether the power is turned on or not, and the light of the backlight module is refracted. out to produce a picture. Since the liquid crystal panel itself does not emit light, it needs ...

AI Technical Summary

Problems solved by technology

see figure 2 , this is because part of the light emitted by the LED light source 200 will be incident on the plastic frame 600. For this reason, the existing technical solution is to make the plastic frame 600 relative to the LED light source 200, the light guide plate 300 and the optical film 500. The reflective layer 700 is set on the position to reflect the light incident on the plastic frame 600 back, but some light will still be reflected into the gap between the light guide plate 300 and the plastic frame 600, thus escaping into bright lines, causing the LED light source 200 to emit light. loss of brightness of the light

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