CN203746905U - White-light LED structure with high color-rendering index and high luminous efficiency - Google Patents
White-light LED structure with high color-rendering index and high luminous efficiency Download PDFInfo
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- CN203746905U CN203746905U CN201420071300.4U CN201420071300U CN203746905U CN 203746905 U CN203746905 U CN 203746905U CN 201420071300 U CN201420071300 U CN 201420071300U CN 203746905 U CN203746905 U CN 203746905U
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- fluorescence coating
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- 238000009877 rendering Methods 0.000 title abstract description 11
- 239000003086 colorant Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims description 96
- 239000011248 coating agent Substances 0.000 claims description 90
- 238000004020 luminiscence type Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 abstract description 38
- 238000002156 mixing Methods 0.000 abstract description 8
- 230000008021 deposition Effects 0.000 abstract description 3
- 230000031700 light absorption Effects 0.000 abstract 2
- 239000000463 material Substances 0.000 description 17
- 239000000047 product Substances 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
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- 229910002027 silica gel Inorganic materials 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910003564 SiAlON Inorganic materials 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 1
- 108010043121 Green Fluorescent Proteins Proteins 0.000 description 1
- 229910002114 biscuit porcelain Inorganic materials 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Abstract
The utility model relates to a white-light LED structure with the high color-rendering index and high luminous efficiency. In the prior art, the LED employs the fluorescent layer with mixed fluorescent powders; and the fluorescent powders can not be mixed uniformly and easily; and thus the finished product yield is low, light absorption exists, the fluorescent powder utilization rate is low, and the cost is high. However, with the white-light LED structure, the above-mentioned problems can be solved. The provided white-light LED structure comprises a bowl cup; and a light-emitting chip is arranged at the bottom of the bowl cup. Besides, the white-light LED structure includes two fluorescent layers with different colors, wherein the two fluorescent layers include a first fluorescent layer and a second fluorescent layer; the first fluorescent layer and a second fluorescent layer are successively superposed in the same bowl cup or are respectively and individually arranged in different bowl cups. According to the scheme, the provided white-light LED structure has the following advantages: the mixed fluorescent layer in the LED bowl cup is separated into two individual fluorescent layers, so that a problem of low finished product yield caused by non-uniform mixing of fluorescent powders and different deposition rates of different fluorescent powders of the mixed fluorescent layer can be solved; meanwhile, the mutual light absorption problem between different fluorescent powders can be solved and the color-rendering index is ensured.
Description
Technical field
The utility model relates to a kind of LED technical field, relates in particular to a kind ofly to ensure that the height that shows index, reduce costs is aobvious and refer to high light efficiency white-light LED structure.
Background technology
Along with the lifting of light-emitting diode (LED) chip and encapsulation technology, white light LEDs is progressively subject to people's favor as general lighting light source.It has the series of advantages such as low pressure, low-power consumption, high reliability, long-life, be widely used in the field such as LED street lamp, LED light fixture, be the green new light sources that one meets country's " energy-saving and emission-reduction " policy, be expected to replace the fluorescent lamp and the incandescent lamp that dominate at lighting field at present.
But the color rendering of white light LEDs is to restrict it to enter room lighting, the particularly technical bottleneck of reading lighting, medical illumination.For a long time, rare-earth garnet (YAG:Ce3+) yellow fluorescent powder that people adopt InGaN base blue-light LED chip and Ce3+ to activate combines to prepare cold white light LEDs (Tc>5,000K), can realize color rendering index higher than 80, but prepare warm white LED (Tc<5,000K) time, because the unbalanced people of making of white light LEDs spectrum are difficult to realize low colour temperature and high-color rendering technically simultaneously.
Make at present the high aobvious method referring to of low colour temperature and have following two kinds:
Adopt blue-light LED chip to excite more than the Tc of green and the white light LEDs that red fluorescence powder obtains and Ra be respectively 3,000 K and 80, the light efficiency of device only has 90lm/W.
Adopt blue-light LED chip to excite β-SiAlON:Eu green emitting phosphor, Ca-α-SiAlON:Eu yellow fluorescent powder and CaAlSiN3:Eu red fluorescence powder, obtained colour temperature from cold white to the warm white light that adjustable, color rendering index is 80 in vain.The advantage of the method is the adjustable color temperature that can obtain by adjusting the ratio of three kinds of fluorescent material certain limit;
Above two kinds of modes are all after different fluorescent material all mixes, to apply or put glue operation, easily cause powder to be difficult for mixing or mixing inhomogeneous, and there is each other absorption effects, especially rouge and powder absorption green glow converts part ruddiness to, because part ruddiness is the process that is being converted to ruddiness and has individual light secondary to change by absorbing the green glow that sends of green emitting phosphor, according to becoming quantum efficiency to reduce, the consumption that causes green powder (fluorescent material) increase and the price of green emitting phosphor be yellow fluorescent powder 2-3 doubly, cause cost to increase.And the launching efficiency of the green glow of rouge and powder to different wave length is different, so rouge and powder sends the absorption of green glow to green powder, the change of indirect the emission spectrum of green powder, thereby we need to mate and just can reach the high color developing effect that we want with the shorter green powder of wavelength, this also indirect increase the cost of fluorescent material.Be illustrated in figure 1 the excitation wavelength of rouge and powder, excitation wavelength span is to green-yellow light, and the efficiency of green-yellow light can be lower than blue light part, so red fluorescence powder can absorb green-yellow light and green glow, causes whole efficiency step-down, and much larger with powder quantitative change.Patent: warm white light emitting device of a kind of low colour temperature and preparation method thereof, the patent No.: 200810101762.5, enter just this kind of drawback, first it apply yellow fluorescent glue, at coated red fluorescent glue, because rouge and powder can cause whole efficiency step-down to the absorption of green-yellow light and green glow, green flour amount increases, and can not play the effect that improves product light efficiency.In addition because the settling rate of different fluorescent material is different, finished product colour temperature consistency deviation after the encapsulation easily causing, the problem that finished product yield is on the low side.
Summary of the invention
The utility model has mainly solved the fluorescence coating of LED employing mixed fluorescent powder in prior art, exist fluorescent material to mix difficult, inhomogeneous, cause finished product yield low, there is each other extinction, fluorescent material utilance is low, the problem that cost is high, provides a kind of and has ensured that the height that shows index, reduces costs shows the high light efficiency white-light LED structure of finger.
The utility model solves the technical scheme that its technical problem adopts: a kind of high aobvious high light efficiency white-light LED structure that refers to, comprise bowl cup, bowl cup bottom arranges luminescence chip, comprise the fluorescence coating of two different colours, be respectively the first fluorescence coating and the second fluorescence coating, the successively stack of described the first fluorescence coating and the second fluorescence coating is arranged in same bowl cup, or is independently arranged on respectively in different bowl cups.The mixing fluorescence coating in LED bowl cup is separated into two independently fluorescence coatings by the utility model, two fluorescence coatings are successively arranged in bowl cup or are independently arranged in different bowl cups, solve mixing fluorescence coating because fluorescent material mixes inhomogeneous, and the rate of deposition of different fluorescent material is different and cause fluorescence coating finished product yield problem on the low side, also avoided problem between different fluorescent material, the problem includes: mutual extinction problem has ensured color rendering index simultaneously.Divide in addition the fluorescence coating of the different colours that is arranged, setting position can be adjusted flexibly, has reduced the problem of extinction, has ensured color rendering index.
As a kind of preferred version, described the first fluorescence coating is red fluorescence layer, and the second fluorescence coating is yellow or yellow-green fluorescence layer, and described the second fluorescence coating is arranged on the top of the first fluorescence coating.The first fluorescence coating is mixed by red fluorescence powder and epoxy or silica gel, and the second fluorescence coating is mixed by yellow or yellow-green fluorescence powder and epoxy or silica gel.The successively gradation of the first fluorescence coating and the second fluorescence coating is molded in bowl cup, and first in bowl cup bottom, the first fluorescence coating is set, the second fluorescence coating is set on the first fluorescence coating, gold-tinted that in the first fluorescence coating, red fluorescence powder sends the second fluorescence coating or the absorption of green-yellow light are solved like this, yellow or the low problem of yellow-green fluorescence powder utilance are avoided, reduce cost, ensured high aobvious index, improved light efficiency simultaneously.
As a kind of preferred version, described the first fluorescence coating is red fluorescence layer, and the second fluorescence coating is yellow fluorescence layer, is provided with two bowl cups that lean on mutually, and the first fluorescence coating and the second fluorescence coating are independently arranged on respectively in two bowl cups.The first fluorescence coating is mixed by red fluorescence powder and epoxy or silica gel, and the second fluorescence coating is mixed by yellow fluorescent powder and epoxy or silica gel.The first fluorescence coating and the second fluorescence coating are separately independently arranged in different bowl cups, have so also avoided the absorption of the gold-tinted that in the first fluorescence coating, red fluorescence powder sends the second fluorescence coating, have avoided the low problem of yellow fluorescent powder utilance, have reduced cost.This set structure decrease has even reduced the use of high aobvious finger product Green fluorescent material in addition, reduce product cost, solve that the different fluorescent material of conventional hybrid fluorescence coating is difficult for mixing, different fluorescent material sinking speed differs and causes the problem that product yield is low and fluorescent material utilance is low, has improved the light efficiency of product simultaneously.
As a kind of preferred version, on the fluorescence coating on described bowl cup surface, be provided with the low refraction substratum transparent of one deck, the refractive index of described substratum transparent is less than the refractive index of fluorescence coating.Low refraction substratum transparent is in order to further raising light extraction efficiency.
As a kind of preferred version, the upper surface of described the first fluorescence coating is arcuate structure.This first fluorescence coating upper surface forms the cover body structure of the structure of arc convex, has further improved the light emission rate of LED.
As a kind of preferred version, the upper surface of described the first fluorescence coating and the second fluorescence coating is arcuate structure.This first fluorescence coating and the second fluorescence coating upper surface form the cover body structure of the structure of arc convex, have further improved the light emission rate of LED.
The utility model has the advantages that: the mixing fluorescence coating in LED bowl cup is separated into two independently fluorescence coatings, two fluorescence coatings are successively arranged in bowl cup or are independently arranged in different bowl cups, solve mixing fluorescence coating because fluorescent material mixes inhomogeneous, and the rate of deposition of different fluorescent material is different and cause fluorescence coating finished product yield problem on the low side, also avoided problem between different fluorescent material, the problem includes: mutual extinction problem has ensured color rendering index simultaneously.Point the be arranged fluorescence coating of different colours, and red fluorescence bisque is arranged on below yellow or green phosphor layer, reduced the problem of extinction, reduced the consumption of bloom or green powder, improved product luminous efficiency when having improved color rendering index.
Brief description of the drawings
Fig. 1 is red fluorescence powder excitation wavelength figure;
Fig. 2 is a kind of structural representation of the present utility model;
Fig. 3 is another kind of structural representation of the present utility model.
1-bowl cup 2-luminescence chip 3-first fluorescence coating 4-the second fluorescence coating 5-substratum transparent.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described.
Embodiment 1:
A kind of high aobvious high light efficiency white-light LED structure that refers to of the present embodiment, as shown in Figure 2, comprise bowl cup 1, be provided with luminescence chip 2 in bowl cup bottom, in bowl cup, include the fluorescence coating of two different colours, be respectively the first fluorescence coating 3 being mixed by red fluorescence powder and silica gel, the second fluorescence coating 4, the first fluorescence coatings that are mixed by yellow fluorescent powder and silica gel and be arranged on bowl cup bottom, the second fluorescence coating is arranged on the first fluorescence coating top.In the middle of the upper surface of the first fluorescence coating, be provided with circular protrusions, the second fluorescence coating lower shape matches with the first fluorescence coating upper surface, and the second fluorescence coating and the first fluorescence coating fit tightly.The upper surface of the second fluorescence coating is arcuate structure.In order further to improve light extraction efficiency, on second fluorescence coating on bowl cup surface, be provided with the low refraction substratum transparent of one deck, the refractive index of substratum transparent is less than the refractive index of fluorescence coating.
Embodiment 2:
The present embodiment has provided the high light efficiency white-light LED structure of the aobvious finger of another kind of height, as shown in Figure 3, includes 1, two bowl cup of two bowl cups and is close together mutually, and bowl cup bottom is provided with luminescence chip.Also include the fluorescence coating of two different colours, being respectively the first fluorescence coating 3 being mixed by red fluorescence powder and silica gel, the second fluorescence coating 4, the first fluorescence coatings that are mixed by yellow fluorescent powder and silica gel and the distribution of the second fluorescence coating is arranged in two bowl cups.The upper surface of the first fluorescence coating and the second fluorescence coating is arcuate structure.In order further to improve light extraction efficiency, be provided with the low refraction substratum transparent of one deck at the first fluorescence coating with above the second fluorescence coating, the refractive index of substratum transparent is less than the refractive index of fluorescence coating.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although more used the terms such as bowl cup, luminescence chip, the first fluorescence coating, the second fluorescence coating herein, do not got rid of the possibility that uses other term.Use these terms to be only used to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all contrary with spirit of the present invention.
Claims (6)
1. the one kind high high light efficiency white-light LED structure of aobvious finger, comprise bowl cup, bowl cup bottom arranges luminescence chip, it is characterized in that: the fluorescence coating that comprises two different colours, be respectively the first fluorescence coating (3) and the second fluorescence coating (4), the successively stack of described the first fluorescence coating and the second fluorescence coating is arranged in same bowl cup, or is independently arranged on respectively in different bowl cups.
2. the high light efficiency white-light LED structure of the aobvious finger of height according to claim 1, is characterized in that described the first fluorescence coating (3) is red fluorescence layer, and the second fluorescence coating (4) is yellow or yellow-green fluorescence layer, and described the second fluorescence coating is arranged on the top of the first fluorescence coating.
3. the high light efficiency white-light LED structure of the aobvious finger of height according to claim 1, it is characterized in that described the first fluorescence coating (3) is red fluorescence layer, the second fluorescence coating (4) is yellow fluorescence layer, be provided with two bowl cups that lean on mutually, the first fluorescence coating and the second fluorescence coating are independently arranged on respectively in two bowl cups.
4. the high light efficiency white-light LED structure of the aobvious finger of height according to claim 1, is characterized in that being provided with the low refraction substratum transparent of one deck (5) on the fluorescence coating on described bowl cup surface, and the refractive index of described substratum transparent is less than the refractive index of fluorescence coating.
5. according to the high light efficiency white-light LED structure of the aobvious finger of the height described in claim 2 or 4, the upper surface that it is characterized in that described the first fluorescence coating (3) is arcuate structure.
6. the high light efficiency white-light LED structure of the aobvious finger of height according to claim 3, is characterized in that the upper surface of described the first fluorescence coating (3) and the second fluorescence coating (4) is arcuate structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420071300.4U CN203746905U (en) | 2014-02-19 | 2014-02-19 | White-light LED structure with high color-rendering index and high luminous efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420071300.4U CN203746905U (en) | 2014-02-19 | 2014-02-19 | White-light LED structure with high color-rendering index and high luminous efficiency |
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| Publication Number | Publication Date |
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| CN203746905U true CN203746905U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420071300.4U Expired - Lifetime CN203746905U (en) | 2014-02-19 | 2014-02-19 | White-light LED structure with high color-rendering index and high luminous efficiency |
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| Country | Link |
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| CN (1) | CN203746905U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463337A (en) * | 2019-01-22 | 2020-07-28 | 深圳市斯迈得半导体有限公司 | High color rendering index L ED light source of red and green double-color combination |
-
2014
- 2014-02-19 CN CN201420071300.4U patent/CN203746905U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463337A (en) * | 2019-01-22 | 2020-07-28 | 深圳市斯迈得半导体有限公司 | High color rendering index L ED light source of red and green double-color combination |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |
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| CX01 | Expiry of patent term |