Light guiding system, side-inlet type backlight module and liquid crystal display

Abstract

The invention discloses a light guiding system, a side-inlet type backlight module and a liquid crystal display. The light guiding system comprises an ambient light collection system, a plurality of light guiding devices and a fluorescent film. The ambient light collection system faces ambient light to absorb the ambient light. Every light guiding device is provided with a light inlet end and a light outlet end, the light outlet end is close to a light inlet side of a light guiding plate, the light inlet end is close to the ambient light collection system, and the absorbed ambient light enters into the light inlet end and is transmitted to the light outlet end. The fluorescent film is arranged between the light outlet end and the light inlet side. The fluorescent film enables light beam emitted from the light outlet end to be scattered, so that the phenomenon of uneven brightness of the light beam emitted from the light outlet end on the light inlet side is improved and the optical taste of the side-inlet type backlight module is improved, and moreover, the fluorescent film can convert shortwave light with wavelength of 200nm to 400nm into visible light to prevent parts of the side-inlet type backlight module from being irradiated by the shortwave light, so that the service life of the parts can be prolonged, and the service life of the liquid crystal display can be prolonged.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a light introduction system, a side-entry backlight module and a liquid crystal display. Background technique [0002] Nowadays, most of the backlight modules of LCD (Liquid Crystal Display) use the original light source as the backlight light source. The original light source mentioned here refers to the light source that uses energy such as electricity to make itself illuminate, such as LED. LED has the advantage of high efficiency and energy saving, so it is widely used as a backlight light source in a backlight module. However, as people pay more attention to energy saving and environmental protection, the power consumption of the backlight light source in the current backlight module needs to be further reduced, which requires reducing the number of LEDs used to reduce the power consumption of the backlight light source, or using a new type of energy-saving li...

AI Technical Summary

Problems solved by technology

However, since the light-emitting angle of the light-emitting end 21 of the optical fiber 20 is small (usually less than 60 degrees), the brightness difference between the front of the light-emitting end 21 and the light-emitting end 21 (that is, the left and right sides of the light-emitting end 21) is too large, resulting in bright light. The phenomenon of being dark and clear, when it is serious, the position of each light outlet 21 can be distinguished, which seriously affects the optical quality of the backlight module

In addition, because the ambient light CL contains a certain amount of short-wave light (the wavelength range is about 200nm ~ 400nm), some polymer materials will undergo photochemical reactions under long-term irradiation of short-wave light, and in the backlight module, many components They are all made of polymer materials, so they are very sensitive to short-wave light. If they are irradiated by short-wave light for a long time, the functions of many components will be greatly affected and their lifespan will be reduced.

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