Backlight lighting device and backlight lighting method thereof

Abstract

The invention discloses a backlight lighting device and a backlight lighting method thereof. The backlight lighting device comprises a point light source and a light guide plate, wherein the light guide plate is fixed in a packaging shell; a reflecting sheet is arranged on one side of the light guide plate; and a diffusing sheet and a brightening film are arranged on the other side of the light guide plate sequentially. The point light source is converted into a surface light source in a mode of placing the point light source in the centre of a hemispherical groove, or in a mode of printing reflective ink spots on the light guide plate or carving grid lines, or in a mode of adding nanometre light-scattering particles into the light guide plate. In the backlight lighting method, a light ray which is emitted from the point light source is converted into the surface light source by the light guide plate. The backlight lighting device and the backlight lighting method thereof have the advantages of uniform and soft light ray, relatively low light loss, high brightness, low cost and the like.

Description

technical field [0001] The invention relates to a backlight lighting device and a backlight lighting method thereof, in particular to a backlight lighting device for refrigerator lighting and a backlight lighting method thereof. Background technique [0002] LED is an energy-saving, environmentally friendly, and radiation-free laser-type point light source, so the greater the power, the more dazzling it will be. When multiple LEDs are used together for lighting, there will be uneven light output. Existing electric light sources are various, and can be divided into point light sources, line light sources and extended light sources (also known as extended light sources or surface light sources) according to the size of the illuminant. With the improvement of people's living standards, the requirements for lighting sources are also constantly increasing, especially for household appliances and landscape lighting in public places, which not only have certain requirements for bri...

AI Technical Summary

Problems solved by technology

Some also use white plastic or translucent fabric lampshades to overcome the direct glare produced by point light sources, which not only consumes a lot of light energy, but also is very unsafe.

Although the existing fluorescent lamp line light source and AC electroluminescent surface light source can overcome the direct glare produced by the point light source illuminant, due to its complicated processing technology, poor anti-vibration ability and high cost, especially the AC electroluminescent surface The light source can only be made into a low-illuminance surface light source, which cannot be widely used

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