Backlight lamp and back light module of liquid crystal display

Abstract

The invention relates to a backlight lamp and a backlight module for liquid crystal display devices. The backlight lamp comprises a tube which outer wall is provided with a plurality of prisms for reducing the entrance of the external light from the tube. The backlight module adopts the liquid crystal display device backlight lamp, a light guide plate and a backlight reflection plate, wherein the backlight lamp is arranged at the side edge of the light guide plate and arranged in the backlight lamp reflection plate. The technical scheme of the invention reduces the external light incidence of the tube that reflected into the tube, to reduce light loss, improve the brightness of the backlight source of a liquid crystal display device and reduce energy consumption.

Description

technical field [0001] The invention relates to a backlight of a liquid crystal display device and a backlight module, in particular to a backlight providing a backlight for a liquid crystal display and a backlight module using the backlight. Background technique [0002] The backlight module of the existing liquid crystal display device is a simple and effective module structure for converting a linear light source into a planar light source with high brightness and high surface uniformity. The general structure of the backlight module of a liquid crystal display device is as follows: Figure 1A with 1B As shown, it includes: a reflection plate 10 arranged at the bottom; on the reflection plate 10, a light guide plate 11 that converts the line light source into a surface light source; a lower diffusion sheet 12 that disperses the light emitted from the light guide plate 11, an upper diffusion plate Sheet 15; the lower prism film 13 and the upper prism film 14 that condense...

AI Technical Summary

Problems solved by technology

[0004] In the process of carrying out the research of the present invention, the inventor found that at least one problem in the backlight source of the liquid crystal display device adopted above is: when the lamp tube 1 used as the backlight is working, as image 3 As shown, a part of the light directly enters the light guide plate 11, such as the light path a, and another part of the light will be directed to the backlight reflector 17. Under the reflection of the backlight reflector 17, a part of the light is reflected and enters the light guide plate 11, such as Light path b, another part of the light is directed to the lamp tube 1 and is partially absorbed by the lamp tube 1, such as the light path c, it is also possible that the light is reflected by the light guide plate 11 and then enters the lamp tube 1

There is still no technical solution that can effectively solve this problem in the prior art

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