LED illumination device

Abstract

The invention relates to an LED illumination device which comprises a plurality of LED light sources, a light guide plate and a lampshade, wherein at least one end of the light guide plate forms a light inlet surface, the light inlet surface is arranged opposite to the LED light sources, both side surfaces of the light guide plate respectively form a reflection surface, a plurality of salient and sunken dimming grains are arranged on at least one side surface, exit lights of the LED light sources carry out internal reflection transmission between the both side surfaces of the light guide plate after entering the light guide plate from the light inlet surface, a light beam illuminating to the dimming grains generates diffusion and is emitted, and a light beam exiting from the side surfaces of the light guide plate is illuminated on the inner surface of the lampshade and finally exits to the outside through the lampshade. Through arrangement of the light guide plate, the LED illumination device can obtain a double surface light source with uniform exit lights, can obtain an all-round uniform light emitting surface by matching with an all-round lampshade to satisfy the demands of the wide angle illumination characteristic and can improve the direct glare effect of the LED light sources.

Description

technical field [0001] The invention relates to an LED lighting device, in particular to a fluorescent lamp type LED lighting device with a good irradiation angle. Background technique [0002] Compared with traditional light sources, light-emitting diodes (LEDs) have the advantages of high luminous efficiency, low radiation, long life, low power consumption, low pollution, low driving voltage, and miniaturization of lamps. LEDs are gradually used as lighting devices for fluorescent lamps. It has been widely used and gradually replaced traditional fluorescent lamps. However, LED is a point light source with a small luminous angle and strong directionality. The luminous angle of LED fluorescent lamp is about 100-140 degrees, while the traditional fluorescent lamp emits light evenly around 360 degrees. The effective lighting range of LED fluorescent lamp is far Smaller than traditional fluorescent lamps, so the use of LED fluorescent lamps in the application of traditional fl...

AI Technical Summary

Problems solved by technology

In the production process or due to the error of the material texture, the luminous efficiency and wavelength of the LED point light source of each LED fluorescent lamp will also be uneven, and the color rendering will be poor, which will affect the lighting quality.

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