Lateral entering type backlight module

Abstract

The invention provides a lateral entering type backlight module, which comprises a backlight source for emitting blue light, a light guide plate and a fluorescent powder layer, wherein the light guide plate comprises a light entering surface, the backlight source corresponding to the light entering surface is arranged on the side of the light guide plate, the fluorescent powder layer is arranged on the light entering surface of the light guide plate through an adhesive layer, the end surface of the adhesive layer contacting with the fluorescent powder layer is a smooth and continuous curved surface, the fluorescent powder layer is arranged along the curved surface, the fluorescent powder layer is excited by the blue light emitted by the backlight source to generate white light, and the white light penetrates through the adhesive layer and enters the light guide plate. The service lives of the module and the backlight source can be prolonged, the color cast degree of the module is reduced, light is scattered more evenly, condensation points are decreased, and uniformity of the light guide plate is improved.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a side-entry backlight module. Background technique [0002] The liquid crystal display device is referred to as LCD (Liquid Crystal Display). Its working principle is to place liquid crystal molecules between two parallel glasses. , to refract light to produce a picture. Since the liquid crystal display device has many advantages such as thin body, power saving, and no radiation, it has been widely used. Most of the liquid crystal display devices currently on the market are backlight liquid crystal displays, which generally include a liquid crystal panel and a backlight module. Backlight modules can be divided into side-type backlight modules and direct-type backlight modules according to the incident position of the light source, so as to provide backlight to the liquid crystal display. The structure of the existing side-entry backlight module generally includes a back...

AI Technical Summary

Problems solved by technology

[0004] 1. When the light emitted by the light source chip passes through the phosphor, there is a difference in optical path, resulting in serious color shift

[0005] 2. The white light emitted by the WLED passes through the light guide plate with a flat side, and the refraction that occurs when the light path is sparse to light dense makes the light concentrated and reduces the uniformity

[0006] 3. It is easy to cause serious focus points due to uneven light mixing between LEDs

[0007] 4. During the use of WLED as a backlight source, the heat generated by the LED light source chip is easy to heat the phosphor powder, causing light decay, and the luminous efficiency of the phosphor powder is seriously reduced, which affects the light intensity of the module.

[0008] To solve the above problems, such as figure 1 As shown, an existing edge-lit backlight module includes a light source module 100 that emits blue light and a light guide plate 200. The light incident surface of the light guide plate 200 is provided with a fluorescent powder for being excited by blue light to generate white light. The phosphor film 300, the phosphor film 300 includes phosphor and colloid, and the phosphor film 300 is set separately from the light source module 100, which can effectively avoid the light decay phenomenon caused by the phosphor being heated, but fails to solve the problem of uneven light mixing, resulting in serious spotlight problem

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