Blue light preventing packaging LED and backlight module thereof

A light-emitting device and anti-blue light technology, which is applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of reduced brightness of LED packages and changes in module color points, and achieves the advantages of easy promotion and application, reduction of harmful short-wave blue light, and eye protection Effect

Pending Publication Date: 2018-06-08
APT ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, LED anti-blue light technology is mainly divided into two types: one method is the module structure, adding materials for filtering specific wavelengths in the module structure to filter specific blue light wavelengths, which can effectively reduce harmful blue light energy, but reduce blue light The energy will change the RGB rat

Method used

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  • Blue light preventing packaging LED and backlight module thereof
  • Blue light preventing packaging LED and backlight module thereof
  • Blue light preventing packaging LED and backlight module thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1

[0038] This embodiment provides an anti-blue encapsulated LED light emitting device, which is composed of an LED blue light chip with a peak wavelength of 445 nm and a fluorescence conversion layer. The fluorescence conversion layer is composed of white light conversion phosphor, fluorescence conversion material and silica gel.

[0039] In this embodiment, the white light conversion phosphor absorbs yellow light in the wavelength range of 500-600 nm emitted by the LED blue light chip, and the blue light emitted by the LED blue chip and the yellow light emitted by the white light conversion phosphor are mixed into white light. In order to reduce the harm of high-energy short-wave blue light in the 400-450nm band, and to avoid the color coordinate shifting out of the range required by the backlight source simply due to the decrease in the content of blue light, the fluorescent conversion material of the present invention is added. The fluorescence conversion mate...

Example Embodiment

[0040] Example 2

[0041] This embodiment provides an anti-blue encapsulated LED light-emitting device, and the same parts as those in the first embodiment will not be repeated.

[0042] The peak wavelength of the LED blue chip in this embodiment is 455nm, the white light conversion phosphor absorbs the green and red light emitted by the LED blue chip, and the blue light emitted by the LED blue chip is mixed with the green light and red light emitted by the white light conversion phosphor. Into white light. The fluorescence conversion material in this embodiment is LuGaAG, the absorption peak wavelength is located at 410 nm, and the absorption of blue light with a wavelength of 455 nm is 15% of the maximum absorption peak. The half-wave width of the absorption peak of the fluorescence conversion material in this embodiment is 50 nm, and its emission peak is 500 nm, and it emits in the range of 465-500 nm. The weight percentage of the fluorescence conversion material in this embo...

Example Embodiment

[0043] Example 3

[0044] This embodiment provides an anti-blue encapsulated LED light-emitting device, and the same parts as those in the first embodiment will not be repeated.

[0045] The peak wavelength of the LED blue light chip in this embodiment is 435nm, the white light conversion phosphor absorbs the green and red light emitted by the LED blue light chip, and the blue light emitted by the LED blue chip is mixed with the green light and red light emitted by the white light conversion phosphor Into white light. The fluorescence conversion material in this embodiment is GaYAG, the absorption peak wavelength is at 430 nm, and the absorption of blue light with a wavelength of 455 nm is 5% of the maximum absorption peak. The half-wave width of the absorption peak of the fluorescence conversion material in this embodiment is 60 nm, and its emission peak is 520 nm, and it emits in the range of 465-500 nm. The weight percentage of the fluorescence conversion material in this emb...

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Abstract

The invention discloses a blue light preventing packaging LED and a backlight module thereof. The blue light preventing packaging LED includes at least one LED blue light chip. The LED blue light chipis covered with a fluorescence converting layer including a white light converting fluorescent powder and thermosetting gel. The fluorescence converting layer also includes a fluorescence convertingmaterial capable of absorbing blue light whose peak wavelength within a wave band range of 435 to 475 nm so as to make red shift of the peak wavelength of blue light. The backlight module is therein provided with the blue light preventing packaging LED. The invention aims to reduce damage of blue light as well as to keep prior packaging color dots and luminance for the LED and the backlight moduleprovided with the LED.

Description

technical field [0001] The invention relates to the technical field of LEDs, in particular to an anti-blue light packaged LED light-emitting device and a backlight module thereof. Background technique [0002] Anti-blue light has become a new hot spot in the LED field, and the market demand for anti-blue light products is also increasing. Traditional blue light exists in large quantities in the light emitted by computer monitors, fluorescent lamps, mobile phones, digital products, display screens, LEDs, etc. Blue light within this wavelength will increase the amount of toxins in the macular area of ​​the eye, seriously threatening human eye health. Harmful blue light between 400nm-450nm has the highest energy and is the most harmful to human eyes. [0003] At present, LED anti-blue light technology is mainly divided into two types: one method is the module structure, adding materials for filtering specific wavelengths in the module structure, so that it can filter specific ...

Claims

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Application Information

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IPC IPC(8): H01L33/50
CPCH01L33/502
Inventor 姚述光龙小凤万垂铭姜志荣曾照明侯宇肖国伟
Owner APT ELECTRONICS
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