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LED (light emitting diode) encapsulation structure for reducing blue light damage

A technology of LED packaging and LED chips, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of large influence of TV backlight, yellowish display color, visual effect, etc., to reduce blue light harm, good picture quality, Damage reduction effect

Inactive Publication Date: 2015-05-20
SHINEON BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the harm of this low-band blue light, the main method at present is to take some light filtering measures for human eyes and backlight, such as using anti-blue light glasses, pasting blue light filter film on the display, and adjusting the display to prevent blue light through software. This method can filter out part of the blue light, but it will lead to loss of brightness, and it will also cause the color of the display to be yellowish, and the visual effect will be affected
This method especially has a greater impact on the TV backlight

Method used

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  • LED (light emitting diode) encapsulation structure for reducing blue light damage

Examples

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Effect test

Embodiment 1

[0024] Prepare LED package structures according to the following proportions.

[0025] 1) Conventional white light LED: use a blue light chip with a wavelength of 450nm, the phosphor concentration is 10%, of which 85% is yellow powder with a wavelength of 557nm; 12% is green powder with a wavelength of 525nm; the proportion of red powder with a wavelength of 650nm is 3%;

[0026] 2) The white light LED capable of reducing the harm of blue light according to the present invention: a blue light chip with a wavelength of 460nm is used, and the phosphor concentration is 15%, of which 80% is yellow powder with a wavelength of 568nm; 16% is green powder with a wavelength of 525nm; The ratio of 650nm red powder is 3%;

[0027] Compare the blue light spectra of the above 1) and 2) white LED packaging structures, the results are shown in figure 1 . figure 1 Among them, the spectrum corresponding to the peak on the left is the white light LED spectrum using a common blue light chip 44...

Embodiment 2

[0030] 2) The white light LED capable of reducing blue light damage prepared in Example 1 was packaged into a white light LED, and the crystal was fixed on the backlight light bar to realize an 18.5-inch side-type backlight.

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Abstract

The invention relates to an LED (light emitting diode) encapsulation structure for reducing blue light damage. A blue light chip of the LED encapsulation structure adopts a high-wave blue light chip grater than 455nm, meanwhile, the concentration and the proportion ratio of fluorescent powder in a fluorescent layer are simultaneously regulated, and products of the invention are obtained. The LED encapsulation structure for reducing blue light damage is particularly suitable for being used as a back light source of a television, a display and the like. Compared with the LED encapsulation structure used by the existing backlight source, the LED encapsulation structure has the following advantages that the long wave blue light chip is adopted, the injury of blue light on human eyes is greatly reduced, meanwhile, the blue light wave band of the traditional LED is upwards moved, a pair of protection glasses, a display screen blue-light-proof film and software do not need to be used for regulating display blue light wave bands, in addition, through the regulation on the proportion of the fluorescent powder in the fluorescent powder layer, the brightness of the display cannot be reduced, meanwhile, the yellow color of the backlight source cannot be caused, the image grade cannot be influenced, and in addition, higher brightness and better image grade can be realized.

Description

technical field [0001] The invention relates to the technical field of semiconductor lighting, in particular to a low blue light LED packaging structure capable of reducing blue light hazards. Background technique [0002] LED replaces traditional incandescent lamps, fluorescent lamps and metal halide lamps, becoming the fourth generation of light sources and lighting products, and has been widely used in various lighting and display fields. [0003] At present, there are three main forms of synthetic white light: one is to synthesize white light LED by exciting yellow phosphor powder with blue light chip; [0004] Among the three synthesis methods, blue light is an important component, and the damage of light to human eyes is mainly concentrated in ultraviolet rays, near ultraviolet rays, infrared rays and blue light with a wavelength of 400-500nm. When the light is at a short wavelength, the photochemical reaction plays a major role. The shorter the wavelength, the greate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/48H01L33/50
CPCH01L33/48H01L33/50
Inventor 刘国旭朱贺玲赵玉磊
Owner SHINEON BEIJING TECH
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