A led white light source device

Abstract

The present invention provides an LED (light-emitting diode) white light source device. The device comprises a heat dissipation substrate, an inner encapsulation layer, a blue light blocking encapsulation layer, an antiglare layer, a uniform light optical structure, a blue light LED chip and a lamp cup; and the heat dissipation substrate is disposed on the outer bottom surface of the lamp cup; theblue light LED chip is located at the inner bottom surface of the lamp cup and is in conductive contact with the heat dissipation substrate; the inner encapsulation layer covers the blue light LED chip and contains yellow light fluorescent powder; the blue light blocking encapsulation layer is disposed on the inner encapsulation layer; the antiglare layer is disposed on the blue light blocking encapsulation layer; the uniform light optical structure is disposed on the antiglare layer; and the blue light blocking encapsulation layer has a blocking rate of 80% or more for light in wavelength bands of 460 nm or below, has a blocking rate of 90 to 98% for blue and violet light in wave bands ranging from 350 to 460 nm, and keeps a light transmittance rate of 85% or above for visible light in bands ranging from 470 to 750 nm. The light source device of the present invention can achieve blue light blocking efficiency of more than 90%, can well filter out of blue and violet harmful wavelengthlights, emit soft white light, can be widely used in various kinds of LED lighting, and is an innovated LED (light-emitting diode) lighting device.

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 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 implementation process of the blue LED chip + YAG yellow p...

AI Technical Summary

Problems solved by technology

Among them, the implementation process of the blue LED chip + YAG yellow phosphor is relatively simple and widely used, but this method needs to effectively process the blue-violet band light emitted by the LED.

[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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