CN104638092A - LED (light emitting diode) encapsulation structure for reducing blue light damage - Google Patents
LED (light emitting diode) encapsulation structure for reducing blue light damage Download PDFInfo
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- CN104638092A CN104638092A CN201510039301.XA CN201510039301A CN104638092A CN 104638092 A CN104638092 A CN 104638092A CN 201510039301 A CN201510039301 A CN 201510039301A CN 104638092 A CN104638092 A CN 104638092A
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- 238000005538 encapsulation Methods 0.000 title claims abstract description 28
- 230000008832 photodamage Effects 0.000 title abstract 3
- 239000000843 powder Substances 0.000 claims abstract description 31
- 230000006378 damage Effects 0.000 claims abstract description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 15
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 4
- 208000027418 Wounds and injury Diseases 0.000 abstract description 4
- 208000014674 injury Diseases 0.000 abstract description 4
- 239000011521 glass Substances 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 238000001228 spectrum Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 4
- 241001025261 Neoraja caerulea Species 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000258 photobiological effect Effects 0.000 description 2
- 238000006552 photochemical reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
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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
The present invention relates to technical field of semiconductor illumination, specifically, relate to a kind of low blue-ray LED encapsulating structure that can reduce blue light harm.
Background technology
LED substitutes traditional incandescent lamp, fluorescent lamp and Metal halogen lamp, becomes forth generation light source and illuminating product, extensively required to various illumination and display field.
Current synthesize white light mainly contains three kinds of forms: a kind of excite yellow fluorescent powder synthesize white light LED for blue chip; Another kind of tricolor powder is excited to be mixed into white light for ultraviolet leds; The third is for adopting red-green-blue composition white light LEDs.
In three kinds of synthesis modes, blue light is all important part, and light mainly concentrates on to the injury of human eye the blue light that ultraviolet, near ultraviolet ray, infrared ray and wavelength are 400 ~ 500nm, when light is in short wavelength, photochemical reaction plays a major role, wavelength is shorter, and the photon energy being in short wavelength region is larger, and photochemical reaction is more serious.When light is in long wave, mainly thermal effect plays a major role, and light absorption causes the rising of human organ temperature, protein denaturation.
The photo-biological fail safe of LED depends primarily on blue light components, the transmissivity of blue light to human eye is high, and mainly concentrate on the blue light components of 400-500nm, wherein the harm of shortwave blue light to human eye of 400-450 is maximum, the photosensitive position of human eye to the absworption peak of light all in this wavelength band.Be applied to the LED product of TV backlight, go out to shield the requirement to color dot and white balance according to it, selected blue-light LED chip wave band mainly concentrates on 440nm-450nm.
Traditional TV backlight is CCFL or common LED backlight product, and these two kinds of backlight forms all exist the blue wave band of 400-450nm human eye being had to harm; The blue wave band of LED backlight mainly concentrates in the shortwave blue light of 440-455nm.People more and more pay attention to photo-biological fail safe and are devoted to reduce or eliminate low band blue light to the injury of human body in recent years.For the harm of this low band blue light, current main method be take for human eye and backlight some to the filtration measure of light, as adopted anti-blue light glasses, over the display subsides filter blue Light Film and carrying out anti-blue light by software adjustment display, these methods can filter a part of blue light, but cause luminance loss, also display color can be caused partially yellow, visual effect is affected simultaneously.This method is especially larger on the impact of TV backlight.
Based on above-mentioned defect, the invention provides a kind of LED encapsulation structure that can reduce blue light harm.
Summary of the invention
The object of this invention is to provide a kind of LED encapsulation structure that can reduce blue light harm.
The LED encapsulation structure that can reduce blue light harm of the present invention, comprises substrate, the blue-light LED chip be fixed on substrate, the phosphor powder layer be stacked on blue-light LED chip, and wherein, described blue chip adopts the high ripple blue chip being greater than 455nm.
Further, described high band blue chip is 460nm and the blue chip higher than 460nm;
Preferably, described high band blue chip is the blue chip of 460nm.
Replace original low ripple blue chip with the high ripple blue chip being greater than 455nm, namely adopt the blue chip of 460nm or more, reduce or eliminate the harm of blue light to human eye.But because normal backlight product uses chip wavelength at 447.5-452.5nm, the fluorescent material (555-565nm) on market is also most best based on efficiency under this wavelength.Maintaining out screen white point, colour gamut, when brightness equal-specification is constant, use high wavelength blue chip coordinate common phosphors in the market cannot reach needs go out to shield white point, colour gamut, brightness, for reaching same specification, the present invention also have adjusted the proportioning of fluorescent material, reduces or eliminates the harm of blue light to human eye.
In described phosphor powder layer, fluorescent material adopts the longer bloom (wavelength 565-585nm) of wavelength to realize maintaining out screen white point coordinates; Add rouge and powder, green powder ensures out the gamut standards of screen simultaneously, selects high luminous power chip to keep the brightness specifications of screen.
Preferably, in described phosphor powder layer, fluorescent material adopts the bloom of wavelength 568nm.
Specifically, Conventional white LED chooses 450nm blue-light LED chip, its phosphor concentration about 10%, and wherein 557nm bloom 85%, 525nm green powder 12%, 650nm rouge and powder is 3%;
Specifically, in the LED encapsulation structure of reduction blue light harm of the present invention, described blue-light LED chip adopts 460nm blue-light LED chip, and phosphor concentration increases to 12%-16%, and wherein employing wavelength is the bloom 78-82% of 568nm; Wavelength is the green powder 15-18% of 525nm; Wavelength is the rouge and powder ratio of 650nm is 2%-4%.
Preferably, in the LED encapsulation structure of reduction blue light harm of the present invention, described blue-light LED chip adopts 460nm blue-light LED chip, and phosphor concentration increases to 15%, and wherein employing wavelength is the bloom 80% of 568nm; Wavelength is the green powder 16% of 525nm; Wavelength is the rouge and powder ratio of 650nm is 4%.
In addition, for adopting in the LED encapsulation structure of blue-light LED chip of more than 460nm, compared with the white light LEDs of routine, described phosphor concentration increases 4%-6%, and its medium green powder increases by 1%, and rouge and powder ratio increases 2%-4%; Wavelength is the bloom of 565-585nm is surplus.
The LED encapsulation structure that can reduce blue light harm of the present invention is especially suitable for use as the backlight of TV, display etc.Compared with the encapsulating structure of existing backlight LED used, there is following advantage:
LED encapsulation structure of the present invention have employed long wave blue chip, greatly reduce the damage of blue light to human eye, move on the blue wave band of traditional LED simultaneously, in the application of backlight, without the need to using safety goggles, display screen anti-blue light film and software to adjust display blue wave band, and by adjusting the ratio of fluorescent material in fluorescence coating, the brightness of display can not be reduced, backlight color can not be caused partially yellow simultaneously, affect picture taste; And compared with reducing with above-mentioned traditional LED the method that display blue light endangers, adopt the LED encapsulation structure that can reduce blue light harm of the present invention, more high brightness and the taste of better picture can be had.
Accompanying drawing explanation
The wavelength that the blue chip of Fig. 1 to be conventional wavelengths be 447nm and the present invention adopt is the blue spectrum comparison diagram of 460nm blue chip, and wherein the peak on the left side is the LED white-light spectrum of common employing 450nm blue chip; The right be the white-light spectrum that the present invention adopts the LED of 460nm high band blue chip; Its X-axis unit is nm, and Y-axis is that (blue-ray LED of 450nm is defined as 1 in the largest light intensity value of integrating sphere build-in test to luminous intensity normalized value, and other light intensity value equal proportion divides.
Embodiment
Following examples only for illustration of the present invention, but are not used for limiting invention scope of the present invention.The technician in this field can make some nonessential improvement and adjustment according to the content of foregoing invention to the present invention.If no special instructions, the method adopted is the method and apparatus that this area is commonly used.
Embodiment 1
LED encapsulation structure is prepared respectively in following ratio.
1) Conventional white LED: adopt wavelength to be the blue chip of 450nm, phosphor concentration is 10%, wherein employing wavelength is the bloom 85% of 557nm; Wavelength is the green powder 12% of 525nm; Wavelength is the rouge and powder ratio of 650nm is 3%;
2) white light LEDs that can reduce blue light harm of the present invention: adopt wavelength to be the blue chip of 460nm, phosphor concentration is 15%, wherein employing wavelength is the bloom 80% of 568nm; Wavelength is the green powder 16% of 525nm; Wavelength is the rouge and powder ratio of 650nm is 3%;
More above-mentioned 1) and 2) blue spectrum of White-light LED package structure, the results are shown in Figure 1.In Fig. 1, the spectrum that left side crest is corresponding is the white light LEDs spectrum adopting normal blue optical chip 447mm, the spectrum that the right crest is corresponding is the white light LEDs spectrum of high band blue chip 460nm, more visible, blue light is to long wave translation 13nm, white-light spectrum is translation 13nm also, greatly reduces the injury of below 450nm blue light to human eye.
Utilize the encapsulation white light LEDs of 21 above-mentioned 1W, make 32 cun of LCD TV backlight sources.This New LED coordinates secondary optical lens, adopts the backlight mode of straight-down negative, realizes the liquid crystal display of low blue light harm.
Embodiment 2
By prepared by embodiment 1 2) white-light LED encapsulation that can reduce blue light harm of the present invention is white light LEDs, die bond, on backlight lamp bar, realizes 18.5 cun of side-edge type backlights.
Claims (8)
1. can reduce a LED encapsulation structure for blue light harm, comprise substrate, the blue-light LED chip be fixed on substrate, the phosphor powder layer be stacked on blue-light LED chip, it is characterized in that, described blue chip adopts the high ripple blue chip being greater than 455nm.
2. LED encapsulation structure as claimed in claim 1, it is characterized in that, described high band blue chip is 460nm and the blue chip higher than 460nm.
3. LED encapsulation structure as claimed in claim 1 or 2, it is characterized in that, described high band blue chip is the blue chip of 460nm.
4. LED encapsulation structure as claimed in claim 1, is characterized in that, the bloom in described phosphor powder layer in fluorescent material adopts wavelength to be the bloom of 565-585nm.
5. the LED encapsulation structure as described in claim 1 or 4, is characterized in that, the bloom in described phosphor powder layer in fluorescent material adopts the bloom of wavelength 568nm.
6. the LED encapsulation structure as described in claim 1,4 or 5, is characterized in that, described blue-light LED chip adopts 460nm blue-light LED chip, and phosphor concentration increases to 12%-16%, and wherein employing wavelength is the bloom 78-82% of 568nm; Wavelength is the green powder 15-18% of 525nm; Wavelength is the rouge and powder ratio of 650nm is 2%-4%.
7. the LED encapsulation structure as described in claim 1,4,5 or 6, is characterized in that, described blue-light LED chip adopts 460nm blue-light LED chip, and phosphor concentration increases to 15%, and wherein employing wavelength is the bloom 80% of 568nm; Wavelength is the green powder 16% of 525nm; Wavelength is the rouge and powder ratio of 650nm is 4%.
8. the LED encapsulation structure as described in as arbitrary in claim 1-7, is characterized in that, for adopting in the LED encapsulation structure of blue-light LED chip of more than 460nm, compared with the white light LEDs of routine, described phosphor concentration increases 4%-6%, and its medium green powder increases by 1%, and rouge and powder ratio increases 2%-4%; Wavelength is the bloom of 565-585nm is surplus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510039301.XA CN104638092A (en) | 2015-01-27 | 2015-01-27 | LED (light emitting diode) encapsulation structure for reducing blue light damage |
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| CN201510039301.XA CN104638092A (en) | 2015-01-27 | 2015-01-27 | LED (light emitting diode) encapsulation structure for reducing blue light damage |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322225A (en) * | 2015-06-16 | 2017-01-11 | 群创光电股份有限公司 | Backlight source of display device |
| CN108154852A (en) * | 2017-12-29 | 2018-06-12 | 深圳Tcl新技术有限公司 | Backlight assembly, backlight module, display device and its control method |
| CN108289211A (en) * | 2017-01-10 | 2018-07-17 | 深圳市掌网科技股份有限公司 | The eye care method of equipment is shown for virtual reality head |
| CN108458323A (en) * | 2018-02-14 | 2018-08-28 | 易事化控制设备股份有限公司 | It is a kind of to reduce the LED lamp bead fluorescent powder of blue light harm, LED lamp bead and preparation method thereof |
| CN108646456A (en) * | 2018-04-28 | 2018-10-12 | 厦门天马微电子有限公司 | Display module and display device |
| CN108777256A (en) * | 2018-05-04 | 2018-11-09 | 厦门市朗星节能照明股份有限公司 | A kind of classroom eyeshield LED light |
| CN109884845A (en) * | 2017-12-06 | 2019-06-14 | 深圳光峰科技股份有限公司 | Projection device |
| CN109884846A (en) * | 2017-12-06 | 2019-06-14 | 深圳光峰科技股份有限公司 | Projection device |
| CN109950384A (en) * | 2019-04-15 | 2019-06-28 | 旭宇光电（深圳）股份有限公司 | A kind of full spectrum COB light source and the COB lamps and lanterns containing the light source |
| WO2021190384A1 (en) * | 2020-03-26 | 2021-09-30 | 华为技术有限公司 | Backlight module, liquid crystal display screen and terminal |
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Patent Citations (3)
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| US20080048193A1 (en) * | 2006-08-25 | 2008-02-28 | Samsung Electro-Mechanics Co., Ltd. | White light emitting diode module |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322225A (en) * | 2015-06-16 | 2017-01-11 | 群创光电股份有限公司 | Backlight source of display device |
| CN106322225B (en) * | 2015-06-16 | 2019-05-10 | 群创光电股份有限公司 | The backlight of display device |
| CN108289211B (en) * | 2017-01-10 | 2020-09-08 | 深圳市掌网科技股份有限公司 | Eye protection method for virtual reality head display equipment |
| CN108289211A (en) * | 2017-01-10 | 2018-07-17 | 深圳市掌网科技股份有限公司 | The eye care method of equipment is shown for virtual reality head |
| CN109884846B (en) * | 2017-12-06 | 2021-10-26 | 深圳光峰科技股份有限公司 | Projection device |
| CN109884845A (en) * | 2017-12-06 | 2019-06-14 | 深圳光峰科技股份有限公司 | Projection device |
| CN109884846A (en) * | 2017-12-06 | 2019-06-14 | 深圳光峰科技股份有限公司 | Projection device |
| CN109884845B (en) * | 2017-12-06 | 2021-10-26 | 深圳光峰科技股份有限公司 | Projection device |
| CN108154852A (en) * | 2017-12-29 | 2018-06-12 | 深圳Tcl新技术有限公司 | Backlight assembly, backlight module, display device and its control method |
| CN108458323A (en) * | 2018-02-14 | 2018-08-28 | 易事化控制设备股份有限公司 | It is a kind of to reduce the LED lamp bead fluorescent powder of blue light harm, LED lamp bead and preparation method thereof |
| CN108458323B (en) * | 2018-02-14 | 2020-01-17 | 易事化控制设备股份有限公司 | LED lamp bead fluorescent powder capable of reducing blue light harm, LED lamp bead and preparation method of LED lamp bead fluorescent powder |
| CN108646456A (en) * | 2018-04-28 | 2018-10-12 | 厦门天马微电子有限公司 | Display module and display device |
| CN108646456B (en) * | 2018-04-28 | 2021-04-30 | 厦门天马微电子有限公司 | Display module and display device |
| CN108777256A (en) * | 2018-05-04 | 2018-11-09 | 厦门市朗星节能照明股份有限公司 | A kind of classroom eyeshield LED light |
| CN109950384A (en) * | 2019-04-15 | 2019-06-28 | 旭宇光电（深圳）股份有限公司 | A kind of full spectrum COB light source and the COB lamps and lanterns containing the light source |
| WO2021190384A1 (en) * | 2020-03-26 | 2021-09-30 | 华为技术有限公司 | Backlight module, liquid crystal display screen and terminal |
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Application publication date: 20150520 |