Double-color-temperature LED lamp light-emitting device

Abstract

The embodiment of the utility model provides a double-color-temperature LED lamp light-emitting device, and relates to the field of light-emitting devices. Comprising a lamp cup, a light-emitting assembly, a fluorescent assembly and a light storage assembly, the light-emitting assembly comprises a first light-emitting chip and a second light-emitting chip, and the first light-emitting chip and the second light-emitting chip are arranged on the substrate. The fluorescent assembly comprises first fluorescent powder, second fluorescent powder and third fluorescent powder, the first fluorescent powder covers the first light-emitting chip, the second fluorescent powder covers the second light-emitting chip, the third fluorescent powder is filled in the lamp cup, and the thickness of the third fluorescent powder is uniformly reduced from the center to the edge; the light storage assembly comprises light storage glass, and the light storage glass is detachably connected to a cup opening of the lamp cup through a connecting piece. The light efficiency of the light-emitting device is improved, and meanwhile the light uniformity of light source toning application is improved.

Description

Technical Field

[0001] The utility model relates to the field of light-emitting devices, in particular to a dual-color temperature LED lamp light-emitting device. Background Art

[0002] Light Emitting Diode (LED) has the advantages of high efficiency, energy saving, environmental protection, long life, small size, easy maintenance, etc., and has attracted extensive attention from researchers at home and abroad. At present, LED is gradually replacing traditional light sources and becoming the mainstream of lighting sources. Its application fields include commercial lighting, industrial lighting, outdoor lighting, indoor lighting, special lighting and other fields. Smart lighting, as an important part of smart home, has also entered the fast lane of development. Dimming and color adjustment, as one of the functional means, plays a very important role in smart lighting. Its key technology is to achieve dual color temperature dimming and color adjustment on a lamp bead.

[0003] Currently, dual-color temperature lamp beads are generally used to isolate two areas on the bracket to achieve dual color temperature. However, since the light-emitting surface is not in the same area, it will cause a halo phenomenon in the secondary optical design and application of the lamp, and the uniformity is relatively poor. In addition, the small light-emitting surface makes it difficult to improve the lighting effect, and the function is also single. Utility Model Content

[0004] In view of the above problems, the embodiments of the present utility model are proposed to provide a dual-color temperature LED lamp lighting device that overcomes the above problems or at least partially solves the above problems.

[0005] A dual-color temperature LED lamp light-emitting device, comprising a lamp cup, a light-emitting component, a fluorescent component and a light-storage component, wherein a substrate is provided at the bottom of the lamp cup;

[0006] The light-emitting component comprises a first light-emitting chip and a second light-emitting chip, wherein the first light-emitting chip and the second light-emitting chip are respectively arranged on the substrate;

[0007] The fluorescent component includes a first fluorescent powder, a second fluorescent powder and a third fluorescent powder, wherein the first fluorescent powder covers the first light-emitting chip, the second fluorescent powder covers the second light-emitting chip, and the third fluorescent powder is filled in the lamp cup, and the thickness of the third fluorescent powder decreases uniformly from the center to the edge;

[0008] The light-storage component comprises light-storage glass, and the light-storage glass is detachably connected to the cup mouth of the lamp cup through a connecting piece.

[0009] Preferably, the first phosphor and the second phosphor are in a colloid or film state, and the third phosphor is in a colloid state.

[0010] Preferably, the first phosphor and the second phosphor are both formed by mixing silica gel and red phosphor, and the red phosphor is one or a mixture of nitride red powder or fluoride red powder;

[0011] The third phosphor includes a mixture of one or more of nitride cyan phosphor, aluminate yellow phosphor, aluminate green phosphor or nitride red phosphor.

[0012] Preferably, the nitride oxide cyan phosphor is BaSi2O2N2:Eu;

[0013] The aluminate yellow phosphor is Y3Al5O 12 :Ce;

[0014] The aluminate green phosphor is Y3(Al, Ga)5O 12 :Ce、Y3(Al,Si)5O 12 :Ce、Y3(Al,Si,Ga)5O 12 :Ce or Lu3Al5O 12 : A mixture of one or more Ce;

[0015] The nitride red powder is a mixture of one or more of Sr2Si5N8:Eu, CaAlSiN3:Eu or (Sr, Ca)AlSiN3:Eu;

[0016] The fluoride red powder is a mixture of one or more of K2SiF6:Mn, K2GeF6 and K2(Ge,Si)F6.

[0017] Preferably, the peak wavelength band of the nitride cyan phosphor is 490nm-500nm, the peak wavelength band of the aluminate yellow phosphor is 540nm-550nm, and the peak wavelength band of the red phosphor is 600nm-660nm.

[0018] Preferably, the light emitting band of the first light emitting chip is 435nm-447nm, and the light emitting band of the second light emitting chip is 457nm-465nm.

[0019] Preferably, at least two groups of the connecting members are provided, and the connecting members include a first fixing plate and a second fixing plate, the first fixing plate is fixed to the inner wall of the lamp cup, the second fixing plate is elastically inserted into the inner wall of the lamp cup, and the second fixing plate is located above the first fixing plate, and the distance between the first fixing plate and the second fixing plate is greater than the thickness of the light-storing glass.

[0020] Preferably, the first light-emitting chip and the second light-emitting chip are connected to two pins respectively, and a heat-conducting cavity is provided at the bottom of the lamp cup.

[0021] Preferably, a heat sink is provided in the heat conduction cavity, and the heat sink extends out of the side wall of the lamp cup.

[0022] The present application specifically includes the following advantages:

[0023] In an embodiment of the present application, a substrate is provided at the bottom of the lamp cup through a lamp cup, a light-emitting component, a fluorescent component and a light-storage component; the light-emitting component includes a first light-emitting chip and a second light-emitting chip, and the first light-emitting chip and the second light-emitting chip are respectively arranged on the substrate; the fluorescent component includes a first phosphor, a second phosphor and a third phosphor, the first phosphor covers the first light-emitting chip, the second phosphor covers the second light-emitting chip, the third phosphor is filled in the lamp cup, and the thickness of the third phosphor decreases uniformly from the center to the edge; the light-storage component includes a light-storage glass, and the light-storage glass is detachably connected to the cup mouth of the lamp cup through a connecting piece. By arranging the first light-emitting chip and the second light-emitting chip in a lamp cup, so that the light-emitting surfaces thereof are in one area, by covering the first phosphor and the second phosphor on the first light-emitting chip and the second light-emitting chip respectively, and filling the third phosphor in the lamp cup, the first light-emitting chip excites the first phosphor and the third phosphor to form the first color light, and the second light-emitting chip excites the second phosphor and the third phosphor to form the second color light, so as to realize multiple color temperature adjustment on the same light-emitting surface, fully excite the phosphor, avoid the mutual absorption between the phosphors, and improve the light efficiency of the light-emitting device, and by setting the thickness of the edge position of the third phosphor to be less than the thickness in the middle, the amount of phosphor at the edge position is reduced, the color temperature at the edge position is adjusted, and the yellow halo phenomenon is reduced; by detachably connecting the light-storage glass at the cup mouth of the lamp cup, the use of the light-storage glass can be selected according to the application scenario, especially suitable for highways, which can save costs, and the light-storage glass is arranged at the cup mouth, and the different lights emitted by the first chip and the second chip are mixed evenly after passing through the light-storage glass, thereby improving the lighting effect of the light source. The present application improves the light efficiency of the light-emitting device, and also improves the light uniformity of the light source color adjustment application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 It is a cross-sectional view of the dual-color temperature LED lamp light emitting device of the utility model;

[0026] Figure 2 This utility model Figure 1A schematic diagram of the structure enlargement in the middle;

[0027] Figure numerals: 100, lamp cup; 110, substrate; 120, heat conduction cavity; 130, heat sink; 210, first light-emitting chip; 220, second light-emitting chip; 230, first phosphor; 240, second phosphor; 250, third phosphor; 300, light-storage glass; 310, first fixing plate; 320, second fixing plate; 330, spring. DETAILED DESCRIPTION

[0028] In order to make the objects, features and advantages of the present application more obvious and understandable, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] Reference Figure 1-2 , shows a schematic diagram of the structure of a dual-color temperature LED lamp light-emitting device of the utility model, which may specifically include the following structures: a lamp cup 100, a light-emitting component, a fluorescent component and a light-storage component, wherein a substrate 110 is provided at the bottom of the lamp cup 100;

[0030] The light emitting component includes a first light emitting chip 210 and a second light emitting chip 220, wherein the first light emitting chip 210 and the second light emitting chip 220 are respectively disposed on the substrate 110;

[0031] The fluorescent component includes a first fluorescent powder 230, a second fluorescent powder 240 and a third fluorescent powder 250, wherein the first fluorescent powder 230 covers the first light-emitting chip 210, the second fluorescent powder 240 covers the second light-emitting chip 220, and the third fluorescent powder 250 is filled in the lamp cup 100, and the thickness of the third fluorescent powder 250 decreases uniformly from the center along the side wall of the lamp cup 100;

[0032] The light-storage component includes a light-storage glass 300 , and the light-storage glass 300 is detachably connected to the cup mouth of the lamp cup 100 via a connecting piece.

[0033] In an embodiment of the present application, a substrate 110 is provided at the bottom of the lamp cup 100 through a lamp cup 100, a light-emitting component, a fluorescent component and a light-storage component; the light-emitting component includes a first light-emitting chip 210 and a second light-emitting chip 220, and the first light-emitting chip 210 and the second light-emitting chip 220 are respectively arranged on the substrate 110; the fluorescent component includes a first phosphor 230, a second phosphor 240 and a third phosphor 250, the first phosphor 230 covers the first light-emitting chip 210, the second phosphor 240 covers the second light-emitting chip 220, the third phosphor 250 is filled in the lamp cup 100, and the thickness of the third phosphor 250 decreases uniformly from the center along the side wall of the lamp cup 100; the light-storage component includes a light-storage glass 300, and the light-storage glass 300 is detachably connected to the cup mouth of the lamp cup 100 through a connecting piece. By arranging the first light emitting chip 210 and the second light emitting chip 220 in a lamp cup 100 so that the light emitting surfaces thereof are in one area, by covering the first phosphor 230 and the second phosphor 240 on the first light emitting chip 210 and the second light emitting chip 220 respectively, and filling the third phosphor 250 in the lamp cup 100, the first light emitting chip 210 excites the first phosphor 230 and the third phosphor 250 to form a first color light, and the second light emitting chip 220 excites the second phosphor 240 and the third phosphor 250 to form a second color light, it is possible to realize multiple color temperature adjustment on the same light emitting surface, which can fully excite the phosphors. The light powder is used to avoid the mutual absorption between the phosphors, thereby improving the light efficiency of the light-emitting device. By setting the thickness of the edge of the third phosphor 250 to be less than the thickness in the middle, the amount of phosphor at the edge is reduced, the color temperature at the edge is adjusted, and the yellow halo phenomenon is reduced. By detachably connecting the light-storage glass 300 at the mouth of the lamp cup 100, the use of the light-storage glass 300 can be selected according to the application scenario, especially suitable for highways, which can save costs. The light-storage glass 300 is set at the mouth of the cup, and the different lights emitted by the first chip and the second chip are mixed evenly after passing through the light-storage glass 300, thereby improving the lighting effect of the light source. The present application improves the light efficiency of the light-emitting device, and also improves the light uniformity of the light source color adjustment application.

[0034] Next, a dual-color temperature LED lamp lighting device in this exemplary embodiment will be further described.

[0035] In the embodiment of the present application, the light-emitting component includes a first light-emitting chip 210 and a second light-emitting chip 220, and the first light-emitting chip 210 and the second light-emitting chip 220 are respectively arranged on the substrate 110, wherein the distance between the first light-emitting chip 210 and the second light-emitting chip 220 and the lamp cup 100 is less than 0.7 mm. The reason is that when the distance between the LED chip and the side wall of the lamp cup 100 is larger, the amount of phosphor on the side of the LED chip will be more, the color temperature will become lower, and the color temperature difference between the position with a larger emission angle and the center position of the chip will be greater, so the yellow halo phenomenon will be aggravated; therefore, controlling the distance between the LED chip and the side wall of the lamp cup 100 within a range of less than 0.7 mm can reduce the yellow halo phenomenon to a certain extent and improve the light efficiency.

[0036] In an embodiment of the present application, the fluorescent component includes a first fluorescent powder 230, a second fluorescent powder 240 and a third fluorescent powder 250, the first fluorescent powder 230 covers the first light-emitting chip 210, the second fluorescent powder 240 covers the second light-emitting chip 220, and the third fluorescent powder 250 is filled in the lamp cup 100, wherein the thickness of the third fluorescent powder 250 decreases uniformly from the center along the side wall of the lamp cup 100.

[0037] It should be noted that a phosphor layer is arranged around the blue LED chip, and the phosphor layer generally includes phosphors of three colors: red, yellow, and green, or includes phosphors of two colors: red and yellow, or red and green. The blue light emitted by the blue LED chip excites phosphors of other colors to generate complementary light, which produces a white light effect after superposition. The light intensity of the blue light emitted is not the same at each emission angle. When the emission angle is in the range near zero degrees, such as in the range of ±30°, the blue light emission intensity is relatively strong, while at the edge of the LED chip, that is, in the range of the emission angle close to 90°, such as in the range of ±80° to ±90°, the blue light emission intensity is relatively weak. The difference in light intensity between the center and edge is more obvious, and in the part from the center to the edge, the light intensity will slowly decrease as the emission angle increases. In the prior art, the thickness of the phosphor layer at the center and edge of the LED chip is roughly the same (at the same time, the concentration of each color of the phosphor layer is the same), or due to process reasons, the concentration of the phosphor at the edge is even higher than that at the center. Therefore, the light intensity at the edge is weak, which will inevitably lead to a relatively excessive amount of phosphor at the edge, and the blue light emitted by the LED chip at the edge is not enough to excite all the phosphors, which will lead to unexcited parts of phosphors of various colors. If there is unexcited red phosphor at the edge of the LED chip, the green light and yellow light that have been excited will continue to excite the red phosphor, resulting in an increase in the red light emitted at the emission angle of the LED light-emitting device at the edge, and the color temperature of the red light is low, which leads to a decrease in the overall color temperature of the light emitted at the edge of the LED light-emitting device, showing a yellow halo phenomenon. Therefore, reducing the thickness of the edge of the third phosphor 250 can reduce the occurrence of the yellow halo phenomenon to a certain extent.

[0038] As an example, the first phosphor 230 and the second phosphor 240 are in a jelly or film state, and the third phosphor 250 is in a jelly state. Since the first phosphor 230 and the second phosphor 240 are covered on the chip, the chip is small, so they can be in a jelly or film state, which is easy to process; the third phosphor 250 is filled in the lamp cup 100, so it is designed to be in a jelly state for easy filling and processing.

[0039] As an example, the first phosphor 230 and the second phosphor 240 are both formed by a mixture of silica gel and red phosphor, and the red phosphor is one or a mixture of nitride red powder or fluoride red powder; the third phosphor 250 includes a mixture of one or more of nitrogen oxide cyan phosphor, aluminate yellow phosphor, aluminate green phosphor or nitride red powder.

[0040] Specifically, the nitride cyan phosphor is BaSi2O2N2:Eu; the aluminate yellow phosphor is Y3Al5O 12 :Ce;The aluminate green phosphor is Y3(Al, Ga)5O 12 :Ce、Y3(Al,Si)5O 12 :Ce、Y3(Al,Si,Ga)5O 12 :Ce or Lu3Al5O 12 :Ce or one or more mixtures thereof; the nitride red powder is a mixture of Sr2Si5N8:Eu, CaAlSiN3:Eu or (Sr, Ca)AlSiN3:Eu or one or more mixtures thereof; the fluoride red powder is a mixture of K2SiF6:Mn, K2GeF6 and K2(Ge, Si)F6 or one or more mixtures thereof.

[0041] The third phosphor 250 can be adjusted according to the phosphor combination of the first phosphor 230 and the second phosphor 240. For example, the third phosphor 250 may contain less than 5% red powder for adjusting the color point to ensure the yield and consistency of the device after mass production, thereby reducing costs.

[0042] As an example, the peak wavelength of the nitride cyan phosphor is 490nm-500nm, the peak wavelength of the aluminate yellow phosphor is 540nm-550nm, and the peak wavelength of the red phosphor is 600nm-660nm; the light-emitting wavelength of the first light-emitting chip 210 is 435nm-447nm, and the light-emitting wavelength of the second light-emitting chip 220 is 457nm-465nm. The difference in wavelengths of the phosphors of different colors and the difference in wavelengths of the first light-emitting chip 210 and the second light-emitting chip 220 are mainly considered to make the spectrum more continuous, closer to sunlight, and have better color rendering when the color temperature is mixed.

[0043] In the embodiment of the present application, the light storage component includes a light storage glass 300, and the light storage glass 300 is detachably connected to the cup mouth of the lamp cup 100 through a connecting piece. By setting the light storage glass 300 at the cup mouth, on the one hand, when the chip is working, it can automatically store light, and after storing light, it can be widely used in various places for decoration and night warning. For example, if it is used on a highway, it will automatically emit light at night after storing light, which can save electricity; on the other hand, the light storage glass 300 located at the cup mouth can evenly mix the different lights emitted by the chip.

[0044] As an example, at least two groups of the connecting parts are provided, and the connecting parts include a first fixing plate 310 and a second fixing plate 320, the first fixing plate 310 is fixed to the inner wall of the lamp cup 100, the second fixing plate 320 is elastically inserted into the inner wall of the lamp cup 100, and the second fixing plate 320 is located above the first fixing plate 310, and the distance between the first fixing plate 310 and the second fixing plate 320 is greater than the thickness of the light-storing glass 300. The second fixing plate 320 is slidably connected to the groove provided in the side wall of the lamp cup 100, and a spring 330 is connected to the bottom thereof. When the light-storage glass 300 needs to be installed, it is directly pushed into the cup mouth from the outside. During the movement, the second fixing plate 320 is squeezed, the spring 330 is compressed, and the second fixing plate 320 retracts toward the inside of the side wall of the lamp cup 100. When the light-storage glass 300 moves downward to the first fixing plate 310, the spring 330 is restored, and the second fixing plate 320 extends, limiting the light-storage glass 300 between the first fixing plate 310 and the second fixing plate 320. When disassembly is required, the second fixing plate 320 is pressed to retract it, and the light-storage glass 300 can be taken out.

[0045] Furthermore, the outer end surface of the second fixing plate 320 is as follows Figure 2 The inclined shape shown is convenient for squeezing during installation. A protrusion can be provided on the edge of the light-storage glass 300, so that the light-storage glass 300 can be quickly taken out by holding the protrusion during disassembly.

[0046] As an example, the light-storage glass 300 is in an arc shape, and the arc-shaped structure can improve light mixing uniformity.

[0047] In the embodiment of the present application, the first light emitting chip 210 and the second light emitting chip 220 are connected to two pins respectively, and a heat conduction cavity 120 is provided at the bottom of the lamp cup 100. A heat sink 130 is provided in the heat conduction cavity 120, and the heat sink 130 extends out of the side wall of the lamp cup 100. Two pairs of pins control two light emitting chips respectively, and the heat sink 130 is located at the bottom of the two chips to form a thermoelectric separation structure, and each chip can conduct heat through the entire heat sink 130 to improve heat dissipation efficiency.

[0048] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0049] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0050] The dual-color temperature LED lamp light-emitting device provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for general technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A dual color temperature LED light emitting device, characterized in that: It includes a lamp cup, a light-emitting component, a fluorescent component and a light-storage component, wherein a substrate is provided at the bottom of the lamp cup; The light-emitting component comprises a first light-emitting chip and a second light-emitting chip, wherein the first light-emitting chip and the second light-emitting chip are respectively arranged on the substrate; The fluorescent component includes a first fluorescent powder, a second fluorescent powder and a third fluorescent powder, wherein the first fluorescent powder covers the first light-emitting chip, the second fluorescent powder covers the second light-emitting chip, and the third fluorescent powder is filled in the lamp cup, and the thickness of the third fluorescent powder decreases uniformly from the center to the edge; The light-storage component comprises light-storage glass, and the light-storage glass is detachably connected to the cup mouth of the lamp cup through a connecting piece.

2. The dual color temperature LED light emitting device according to claim 1, characterized in that: The first phosphor and the second phosphor are in a colloid or film state, and the third phosphor is in a colloid state.

3. The dual color temperature LED light emitting device according to claim 1, characterized in that: The first phosphor and the second phosphor are both formed by mixing silica gel and red phosphor, and the red phosphor is one or a mixture of nitride red powder or fluoride red powder; The third phosphor includes a mixture of one or more of nitride cyan phosphor, aluminate yellow phosphor, aluminate green phosphor or nitride red phosphor.

4. The dual color temperature LED light emitting device according to claim 3, characterized in that: The peak wavelength band of the nitrogen oxide cyan phosphor is 490nm-500nm, the peak wavelength band of the aluminate yellow phosphor is 540nm-550nm, and the peak wavelength band of the red phosphor is 600nm-660nm.

5. The dual color temperature LED light emitting device according to claim 1, characterized in that: The light emitting band of the first light emitting chip is 435nm-447nm, and the light emitting band of the second light emitting chip is 457nm-465nm.

6. The dual color temperature LED light emitting device according to claim 1, characterized in that: At least two groups of the connecting parts are provided, and the connecting parts include a first fixing plate and a second fixing plate, the first fixing plate is fixed to the inner wall of the lamp cup, the second fixing plate is elastically inserted into the inner wall of the lamp cup, and the second fixing plate is located above the first fixing plate, and the distance between the first fixing plate and the second fixing plate is greater than the thickness of the light-storing glass.

7. The dual color temperature LED light emitting device according to claim 1, characterized in that: The first light-emitting chip and the second light-emitting chip are connected to two pins respectively, and a heat-conducting cavity is provided at the bottom of the lamp cup.

8. The dual color temperature LED light emitting device according to claim 7, characterized in that: A heat sink is arranged in the heat conduction cavity, and the heat sink extends out of the side wall of the lamp cup.

9. The dual color temperature LED light emitting device according to claim 1, characterized in that: The light-storage glass is in an arc shape.

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