CN107507902A - A kind of burst of ultraviolel white LED lamp structure - Google Patents

Abstract

The invention discloses a kind of burst of ultraviolel white LED lamp structure, including being in totally fusiform lamp body, lamp body is in divergent shape transition from the left and right sides to upper and lower both sides, the inner at left and right sides of lamp body has one piece of substrate respectively, two substrates install one group of UV LED chip to inner side respectively, respectively inwards covered with blue fluorescent glue and yellow fluorescent glue, the blue fluorescent glue, yellow fluorescent glue are passed through by blue phosphor, yellow fluorescent material respectively to be handled to obtain UV LED chip described in this two groups with adhesive process；On the inside of the lamp body UV absorption coating is coated with from the border of blue fluorescent glue and yellow fluorescent glue to upper and lower two side portions.Present invention incorporates gold-tinted quantum dot fluorescent glue and ripe blue light fluorescent RE powder, it is by ultraviolet excitation and is mixed into white light, and shape design is unique, has light disperse function, but low dispersion, very color reduction, there is high decoration and practical value applied to life.

Description

A UV-excited white light LED lamp structure

technical field

The invention relates to the technical field of LEDs, in particular to a structure of an ultraviolet-excited white light LED lamp.

Background technique

At present, the LED technology on the market has matured, and the white light LEDs that have been commercialized are based on the GaN matrix LED chip emitting 450-470 nm blue light and the phosphor powder coated on the surface to excite yellow light emission by blue light, mainly cerium-doped aluminum Yttrium Oxide phosphor. This commercial phosphor also has some disadvantages, mainly poor color saturation and instability of color temperature.

The ultraviolet excitation white light LED light source is realized by exciting the red, green and blue phosphors of the three primary colors by LED light to produce various colors of fluorescence, and then mixing these fluorescence and LED light. The white light LED has high color rendering index, high luminous effect and adjustable color temperature because it has all three primary colors, and this fluorescent system is easy to obtain. Therefore, UV-excited LEDs are the current trend. Phosphor powder Rare earth doped aluminosilicate, nitride, silicate powder is a mature system of phosphor.

In addition, corresponding to the ultraviolet light source used for excitation, the shell and internal structure of the LED lamp also need to be redesigned to meet the requirements of the new excitation method and light energy release.

Contents of the invention

Purpose of the invention: In order to solve the above problems, the purpose of the present invention is to provide an ultraviolet excitation white light LED lamp structure to efficiently mix various colors of light into white light, thereby obtaining a higher color index, and reducing the damage and damage of ultraviolet light sources. side effect.

Summary of the invention: A UV-excited white light LED lamp structure, including a spindle-shaped lamp body, the lamp body diverges from the left and right sides to the upper and lower sides, and the inner ends of the left and right sides of the lamp body respectively have a substrate, two A group of ultraviolet LED chips are respectively installed on the inner side of the substrate, and the two groups of ultraviolet LED chips are respectively covered with blue fluorescent glue and yellow fluorescent glue inwardly, and the blue fluorescent glue and yellow fluorescent glue are respectively made of blue fluorescent powder and yellow fluorescent powder. It is obtained through a glue compounding process; the inside of the lamp body is coated with an ultraviolet absorbing coating from the boundary between the blue fluorescent glue and the yellow fluorescent glue to the upper and lower sides.

Preferably, the material of the lamp body is low dispersion glass, and the shape is a concave lens. The low-dispersion glass reduces the dispersion and restores the true color, and the concave lens makes the light emitted from the LED lamp diverge.

Preferably, the blue phosphor is one of Eu2+-excited barium magnesium aluminum silicate, barium magnesium aluminum oxide, aluminum oxynitride, strontium magnesium silicate, strontium beryllium oxychloride, and barium calcium phosphate . The above minerals excited by Eu ²⁺ emit blue light with high efficiency, pure and stable light color, and the technology is mature.

Preferably, the yellow fluorescent powder is one of CdSe quantum dots, CdTe quantum dots, CuInS quantum dots and graphene quantum dots with a shell structure. The yellow fluorescence quantum efficiency of the above several quantum dots is high, and the coating shell structure is for the quantum dots to be more stable in various adverse environments.

Further, the shell structure covered by the quantum dots of the yellow phosphor is one of ZnS, CdS, and SiO ₂ . The emission energy level of the coating shell structure is higher than that of the core structure, so that a stable protective shell structure can be obtained, and the emission energy level of the shell structure required by green light is higher than that corresponding to red light.

Preferably, the upper and lower sides of the lamp body are curved outwards, and the width of the upper and lower sides of the lamp body, the width of the middle part is 1.4-1.7 times of the width of both ends. The different widths of the upper and lower sides of the lamp body and the narrow shape of the two ends of the middle drum are conducive to the divergence of light and the assembly of multiple LED lights.

Further, the Abbe number of the low dispersion glass is greater than 68.5. The Abbe number is large and the dispersion is small. 68.5 is equivalent to the dispersion of FK-61 lens produced by Chengdu Guangming. It is already a low dispersion standard, and the color reproduction is natural and true.

The beneficial effect of the present invention lies in that the structure of an ultraviolet-excited white light LED lamp of the present invention is exquisite in design. The curved shape design of the lamp body itself and the way of internal packaging substrate and phosphor are novel and unique; the concave lens and low dispersion design can make the light spread wider and the color reproduction more realistic; the UV absorbing coating absorbs excess unused or fluorescent Part of the ultraviolet light leaked after powder attenuation; CdSe quantum dots, CdTe quantum dots, CuInS quantum dots, and graphene quantum dots with a shell structure as yellow light quantum dots have controllable emission peaks and high quantum efficiency; rare earth blue light phosphors have been obtained In order to be widely used, ultraviolet excitation of blue light has high efficiency and long life; the intensity ratio and deployment of these two light colors are easy to obtain high-quality white light LEDs. The invention combines yellow light quantum dot fluorescent glue and mature blue light rare earth fluorescent powder, all of which are excited by ultraviolet light and mixed into white light. The shape design is unique and has light divergence, but it has low dispersion and true color restoration. It has great advantages in life. High decorative and practical value.

specific implementation

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: 1-lamp body, 2-substrate, 3-ultraviolet LED chip, 4-blue fluorescent glue, 5-yellow fluorescent glue, 6-ultraviolet absorbing coating, 7-reflective lens.

detailed description

In order to illustrate the embodiments of the present application or the technical solutions in the prior art more clearly, the embodiments will be briefly introduced below.

As shown in Figure 1, a UV-excited white light LED lamp structure includes a spindle-shaped lamp body 1 as a whole, the material of the lamp body 1 is low dispersion glass, and the shape is a concave lens, and the Abbe number of the low dispersion glass is greater than 68.5 , preferably FK-61 produced by Chengdu Guangming, FPL-51 and FPL-53 produced by Japan Ohara;

The lamp body 1 diverges from the left and right sides to the upper and lower sides. The upper and lower sides of the lamp body 1 are curved outwards. The width of the upper and lower sides of the lamp body 1 is 1.4 of the width of its two ends. -1.7 times, the inner side of the lamp body 1 is distributed with a number of reflectors from the left and right ends to the middle, and the inner ends of the left and right sides of the lamp body 1 respectively have a substrate 2, and a group of ultraviolet LED chips 3 are respectively installed on the inner side of the two substrates 2, the The two groups of ultraviolet LED chips 3 are respectively covered with blue fluorescent glue 4 and yellow fluorescent glue 5 inwardly, and the blue fluorescent glue 4 and yellow fluorescent glue 5 are respectively obtained from blue fluorescent powder and yellow fluorescent powder through glue compounding process; The blue phosphor is one of barium magnesium aluminum silicate, barium magnesium aluminum oxide, aluminum oxynitride, strontium magnesium silicate, strontium beryllium oxychloride, barium calcium phosphate excited by Eu ²⁺ , The yellow fluorescent powder is one of CdSe quantum dots, CdTe quantum dots, CuInS quantum dots, and graphene quantum dots with a coated shell structure, and the quantum dot-coated shell structure of the yellow fluorescent powder is ZnS, CdS, One of _SiO2 ;

The inner side of the lamp body 1 is coated with an ultraviolet absorbing coating 6 from the boundary of the blue fluorescent glue 4 and the yellow fluorescent glue 5 to the upper and lower sides. The combination of aminobenzoic acid and its esters and the mixture of methoxycinnamate are preferred.

The above embodiments are only used to illustrate the preferred technical solutions of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present invention, any improvements or equivalent replacements made are considered as For the protection scope of the present invention, it should still be included in the claims of the present invention.

Claims (7)

1. A UV-excited white light LED lamp structure, characterized in that it comprises a spindle-shaped lamp body as a whole, the lamp body diverges from the left and right sides to the upper and lower sides, and the inner ends of the left and right sides of the lamp body respectively have a Substrate, a group of ultraviolet LED chips are respectively mounted on the inner side of the two substrates, and the ultraviolet LED chips of the two groups are respectively covered with blue fluorescent glue and yellow fluorescent glue inwardly, and the blue fluorescent glue and yellow fluorescent glue are respectively composed of blue fluorescent powder, The yellow fluorescent powder is obtained through a glue compounding process; the inside of the lamp body is coated with an ultraviolet absorbing coating from the boundary between the blue fluorescent glue and the yellow fluorescent glue to the upper and lower sides. 2 . The structure of an ultraviolet excited white LED lamp according to claim 1 , wherein the material of the lamp body is low dispersion glass, and the shape is a concave lens. 3. A kind of ultraviolet excitation white light LED lamp structure according to claim 1, is characterized in that, described blue fluorescent powder is barium magnesium aluminum silicate, barium magnesium aluminum oxide, aluminum oxynitride excited by Eu ²⁺ , strontium magnesium silicate, strontium beryllium oxychloride, barium calcium phosphate in one. 4. A kind of ultraviolet excitation white light LED lamp structure according to claim 1, is characterized in that, described yellow fluorescent powder is the CdSe quantum dot of coating shell structure, CdTe quantum dot, CuInS quantum dot, graphene quantum dot kind of. 5 . The structure of an ultraviolet-excited white LED lamp according to claim 4 , wherein the shell structure coated with quantum dots of the yellow phosphor is one of ZnS, CdS, and SiO ₂ . 6. The structure of an ultraviolet-excited white light LED lamp according to claim 1, characterized in that, the upper and lower sides of the lamp body are curved outwards, and the width of the upper and lower sides of the lamp body, the width of the middle part is 1.4-1.7 times the width at both ends. 7. The structure of an ultraviolet-excited white light LED lamp according to claim 2, wherein the Abbe number of the low-dispersion glass is greater than 68.5.