LED (Light Emitting Diode) illumination device

Abstract

The invention relates to an LED (Light Emitting Diode) illumination device comprising a light source substrate, a plurality of LED light sources, a light guide plate and a lampshade. The plurality of LED light sources are fixed on the light source substrate; the light guide plate is arranged inside the lampshade; a light-incident surface is formed at one end of the light guide plate and is arranged opposite to the LED light source; the light guide plate comprises two lateral surfaces both of which are reflection surfaces and respectively form a first curved surface and a second curved surface; and a plurality of projected or recessed dimming grains are arranged on at least one lateral surface of the light guide plate. Emergent lights of the LED light source entering from the light-incident surface are reflected and transmitted between two lateral surfaces of the light guide plate and are irradiated on the dimming grains to generate diffusion for light emergence; light beams emitting from the lateral surface of the light guide plate are irradiated on the inner surface of the lampshade and are finally emitted to outside through the lampshade. The invention can obtain even emergent lights through the light guide plate, improves the direct glaring effect of the LED light source and ensures that the LED illumination device has favorable irradiation angle.

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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