LED white light source device

Abstract

The invention provides an LED white light source device. The LED white light source device comprises a heat dissipation substrate, an inner encapsulation layer, a blue light shielding encapsulation layer, an anti-dazzling layer, a light uniformizing optical structure, red LED chips, a green LED chip, blue LED chips and a lamp cup; the heat dissipation substrate is arranged on the outer bottom faceof the lamp cup, the red LED chips, the green LED chip and the blue LED chips are located on the inner bottom face of the lamp cup and are in conductive contact with the heat dissipation substrate, the inner encapsulation layer is arranged on the LED chips, the blue light shielding encapsulation layer is arranged on the inner encapsulation layer, the anti-dazzling layer is arranged on the blue light shielding encapsulation layer, and the light uniformizing optical structure is arranged on the anti-dazzling layer; and the shielding rate of the blue light shielding encapsulation layer on lightwith the wave band below 460 nm is 80% or above, the shielding rate of the blue light shielding encapsulation layer on blue-violet light with the wave band ranging from 350 nm to 460 nm ranges from 90% to 98%, and the light transmission rate of the blue light shielding encapsulation layer on visible light with the wave band ranging from 470 nm to 750 nm keeps at 85% or above. The white LED illuminating device can reach the blue light shielding rate of 90% or above, can well filter out blue-violet harmful wave band light and emit white soft light, can be widely applied to various LED illuminating, is an innovation for an existing white LED illuminating device and is wide in development prospect.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to an LED white light source device. Background technique [0002] Semiconductor light-emitting diodes (LED for short) have been used in various lighting fields such as decorative lighting, automotive lighting, and backlight due to their long service life, energy saving, and small size. LED has been recognized as the most valuable new technology in the 21st century. light source. Now almost every one of us comes into contact with LED light sources every day, such as household lighting and computer backlights, etc. Most of the LED lighting devices in these applications are LED lighting devices that emit white light. There are three kinds of light emitting principles of the white LED lighting device in the prior art: blue LED chip + YAG yellow phosphor, RGB three-color LED chip, ultraviolet LED chip + multi-color phosphor. Among them, the technology of emitting white light based on the c...

AI Technical Summary

Problems solved by technology

[0003] White light LED lighting devices have been widely used, including desk lamps in daily life. However, although the existing white light LED lighting devices emit white light, there is a lot of light in the blue-violet band, which is difficult for human eyes to distinguish. Moreover, in order to increase the brightness of white LED lamps, many manufacturers directly increase the overall brightness of white LEDs by increasing the intensity of blue light. Therefore, the white light spectrum emitted by white LED lighting devices in the prior art contains strong blue light components.

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