Golden light emitting device

Abstract

The utility model belongs to the technical field of lighting devices, and particularly provides a golden yellow light emitting device which comprises a blue light emitting unit, a red light emitting unit and fluorescent glue, the fluorescent glue covers the blue light emitting unit and the red light emitting unit, and yellow fluorescent powder and / or red fluorescent powder are / is contained in the fluorescent glue. Blue light emitted by the blue light emitting unit can excite yellow fluorescent powder in the fluorescent glue to generate yellow light, and then the yellow light is mixed with red light emitted by the red light emitting unit to obtain golden yellow light with the color temperature ranging from 1700 K to 2500 K. Compared with a traditional white light LED lamp, the blue light component and the color temperature can be effectively reduced, and the service life of the LED lamp is prolonged. The LED lamp improves the penetrating power of light rays under severe weather conditions such as rain, fog and dust and the road surface reflection efficiency, is particularly suitable for municipal lighting such as urban road lighting and tunnel lighting, enables a driver to see pedestrians and obstacles on the road surface more easily and clearly, and improves the driving safety coefficient.

Description

Technical Field

[0001] This application belongs to the field of lighting device technology, specifically relating to a golden light emitting device. Background Technology

[0002] White LED lights are widely used in urban road lighting and tunnel entrance lighting due to their low cost and energy-saving and environmentally friendly advantages. They generally produce high color temperature white light by combining blue LED chips with phosphors. However, the high blue light content in white light, with its short wavelength and high energy, can easily cause "blue light hazards". Moreover, it has weak penetration under adverse weather conditions such as rain, fog, and dust, resulting in a shortened effective lighting distance. In addition, it is easily absorbed on cement or asphalt roads, resulting in low road surface reflection efficiency and posing safety hazards in places such as expressways. Utility Model Content

[0003] The purpose of this application is to provide a golden light emitting device, which aims to solve the technical problems of high blue light content, weak penetration and low road surface reflection efficiency of existing white LED lights.

[0004] To achieve the above objectives, the technical solution adopted in this application is: a golden light emitting device, comprising a blue light emitting unit, a red light emitting unit, and a fluorescent adhesive, wherein the fluorescent adhesive covers the blue light emitting unit and the red light emitting unit, and the fluorescent adhesive contains yellow phosphor, and the blue light emitting unit, the red light emitting unit, and the fluorescent adhesive work together to emit golden light with a color temperature of 1700K-2500K.

[0005] Furthermore, the fluorescent adhesive also contains red fluorescent powder.

[0006] Furthermore, the blue light emitting unit has an emission wavelength of 450nm-455nm, the red light emitting unit has an emission wavelength of 620nm-625nm, and the ratio of the peak intensity of the blue light emitting unit to the red light emitting unit in the relative spectrum during emission is 1 to 3; the yellow phosphor has an emission peak wavelength of 560nm-570nm.

[0007] Furthermore, the fluorescent adhesive also contains red phosphor with an emission peak wavelength of 620nm-630nm, and the mass ratio of yellow phosphor to red phosphor is greater than or equal to 10.

[0008] Furthermore, the golden light emitting device also includes a support frame with a bowl cup, in which both blue light emitting units and red light emitting units are placed, and fluorescent adhesive is filled inside the bowl cup.

[0009] Furthermore, there are multiple red light emitting units, and these multiple red light emitting units are arranged around the blue light emitting unit.

[0010] Furthermore, the fluorescent adhesive includes a bottom layer and a top layer. The bottom layer covers blue light-emitting units and red light-emitting units, and contains yellow phosphor. The top layer covers the side of the bottom layer that is opposite to the blue light-emitting units and red light-emitting units, and contains red phosphor.

[0011] Furthermore, the thickness of the bottom layer is greater than the thickness of the top layer.

[0012] Furthermore, the stent is a PCT stent, an EMC stent, or a ceramic stent.

[0013] Furthermore, both the blue light-emitting unit and the red light-emitting unit are LED light-emitting chips.

[0014] Compared with existing technologies, the beneficial effects of the golden light emitting device provided in this application are as follows: the blue light emitted by the blue light emitting unit can excite the yellow phosphor in the fluorescent adhesive to produce yellow light, and the yellow light is then mixed with the red light emitted by the red light emitting unit to obtain golden light with a color temperature of 1700K-2500K. Compared with traditional white LED lights, it can effectively reduce the blue light component and color temperature, improve the penetration of light in adverse weather conditions such as rain, fog, and dust, and improve the road surface reflection efficiency. It is especially suitable for municipal lighting such as urban road lighting and tunnel lighting, which can make it easier for drivers to see pedestrians and obstacles on the road and improve driving safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A cross-sectional view of the golden light emitting device provided in the embodiments of this application.

[0017] The following are the labeling elements in the figure:

[0018] 10. Blue light emitting unit;

[0019] 20. Red light emitting unit;

[0020] 30. Fluorescent adhesive; 31. Base layer; 32. Top layer;

[0021] 40. Bracket. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0023] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] White LED streetlights are widely used in urban road lighting and tunnel entrance lighting due to their low cost and energy efficiency. They generally produce high color temperature white light by combining blue LED chips with phosphors. The high blue light content in white light, with its short wavelength and high energy, can easily cause "blue light hazard". In addition, high color temperature white light has weak penetration under adverse weather conditions such as rain, fog, and dust, and is easily absorbed on cement or asphalt roads, resulting in low road surface reflection efficiency and posing safety hazards in places such as expressways.

[0027] To address the above problems, embodiments of this application provide a golden light emitting device, such as... Figure 1As shown, the golden light emitting device includes a blue light emitting unit 10, a red light emitting unit 20, and a fluorescent adhesive 30. The fluorescent adhesive 30 covers the blue light emitting unit 10 and the red light emitting unit 20. The fluorescent adhesive 30 contains yellow phosphor. The blue light emitting unit 10, the red light emitting unit 20, and the fluorescent adhesive 30 work together to emit golden light with a color temperature of 1700K-2500K.

[0028] The blue light emitted by the blue light-emitting unit 10 excites the yellow phosphor in the fluorescent adhesive 30 to produce yellow light. This yellow light is then mixed with the red light emitted by the red light-emitting unit 20 to obtain golden light with a color temperature of 1700-2500K. Compared to the high color temperature white light emitted by traditional white LED lights, this effectively reduces the blue light component and color temperature, improving the light's penetration and road surface reflection efficiency under adverse weather conditions such as rain, fog, and dust. It is particularly suitable for municipal lighting such as urban road lighting and tunnel lighting, making it easier for drivers to see pedestrians and obstacles on the road, thus improving driving safety. Specifically, urban traffic road surfaces are mainly made of cement or asphalt, which more easily absorbs short-wavelength light, such as blue light, while long-wavelength light, such as yellow and red light, is more easily reflected. Therefore, emitting golden light, obtained by mixing yellow and red light, can effectively improve road surface reflection efficiency. At the same time, the long-wavelength characteristic of golden light can improve the light's penetration under adverse weather conditions such as rain, fog, and dust, increasing the effective lighting distance.

[0029] In some embodiments, both the blue light emitting unit 10 and the red light emitting unit 20 are LED light-emitting chips. The use of LED light-emitting chips in both units offers advantages such as fast start-up, high color rendering index (Ra), low cost, and energy efficiency. For municipal lighting, white LED lamps and high-pressure sodium lamps are the dominant choices. While white LED lamps offer advantages such as fast start-up, high Ra, low cost, and energy efficiency, their high blue light content, short wavelength, and high energy can easily lead to "blue light hazard." Furthermore, they have weak penetration under adverse weather conditions such as rain, fog, and dust, and are easily absorbed by cement or asphalt surfaces, resulting in low road surface reflection efficiency. High-pressure sodium lamps emit yellow light, offering advantages such as a soft tone, strong penetration, and high road surface reflectivity. However, their manufacturing and maintenance costs are high, and their start-up time is relatively long, typically 5-10 minutes. Their Ra color rendering index is also low, only 20 to 30. Additionally, they consume a large amount of power; a standard 9-meter pole high-pressure sodium lamp can consume thousands of kilowatt-hours annually. The golden light emitting device provided in this application combines the advantages of high-pressure sodium lamps and white LED lamps. It not only has the advantages of high-pressure sodium lamps, such as soft color tone, strong penetration and high road surface reflectivity, but also has the advantages of white LED lamps, such as fast start-up, high color rendering index Ra, low cost and energy saving and environmental protection.

[0030] The cost of yellow LED chips is generally tens to hundreds of times that of blue LED chips. Compared to the "chip-type" solution that uses a combination of yellow and red LED chips to obtain golden light, the embodiments of this application obtain golden light through a "fluorescent-type" solution that combines blue light-emitting unit 10, red light-emitting unit 20, and phosphor adhesive 30. This reduces production costs, improves the uniformity of yellow and red light mixing, and also increases the color rendering index Ra and luminous efficacy. The color rendering index Ra can reach over 70, and the luminous efficacy can reach over 110 lm / W. A higher color rendering index Ra means that the colors of objects can be reproduced more realistically, providing a clearer and more natural visual experience. Higher luminous efficacy means that less electricity can be consumed under the same lighting requirements, thereby reducing operating costs and environmental impact.

[0031] In some embodiments, the blue light emitting unit 10 emits light at a wavelength of 450nm-455nm, and the red light emitting unit 20 emits light at a wavelength of 620nm-625nm. The ratio of the peak intensity of the relative spectrum of the blue light emitting unit 10 and the red light emitting unit 20 during emission is 1 to 3. The peak emission wavelength of the yellow phosphor is 560nm-570nm. Excessive excitation intensity of the blue light emitting unit 10 can lead to an increased color temperature, a whiter light, and reduced light penetration. Although increasing the amount of phosphor 30 can suppress blue light, it will reduce red light flux, which is detrimental to illumination. Conversely, excessive excitation intensity of the red light emitting unit 20 can lead to a reddish light, a lower color rendering index, and a lower color temperature. By controlling the peak intensity ratio of the blue light emitting unit 10 to the red light emitting unit 20 in the relative spectrum during emission to be 1 to 3, and selecting the emission wavelength of the blue light emitting unit 10 to be 450nm-455nm, the emission wavelength of the red light emitting unit 20 to be 620nm-625nm, and the emission peak wavelength of the yellow phosphor to be 560nm-570nm, the blue light component can be effectively reduced, and a golden yellow light with a color temperature of 1700K-2500K can be obtained.

[0032] In one specific embodiment, there is one blue light emitting unit 10 with an emission wavelength of 452.5nm-455nm, one red light emitting unit 20 with an emission wavelength of 622.5nm-625nm, and the emission peak wavelength of the yellow phosphor is 560nm. The yellow phosphor accounts for 70% of the fluorescent adhesive 30. The resulting golden light has a blue light component accounting for ≤0.5% of the total spectrum, a color temperature of 2400K, a color rendering index Ra of 72, a luminous flux of 32lm, and a luminous efficacy of 116lm / W.

[0033] In some embodiments, the fluorescent adhesive 30 is formed by mixing transparent adhesive and fluorescent powder. The fluorescent powder includes yellow fluorescent powder, and the proportion of fluorescent powder in the fluorescent adhesive 30 is 45%-80%. The proportion of transparent adhesive in the fluorescent adhesive 30 is 20%-55%, and the transparent adhesive can be silicone. The color temperature of the light can be adjusted by adjusting the proportion of fluorescent powder in the fluorescent adhesive 30. The fluorescent powder can be a single type of yellow fluorescent powder or a mixture of fluorescent powders of multiple colors.

[0034] In some embodiments, the fluorescent adhesive 30 also contains red phosphor. By adding red phosphor to the fluorescent adhesive 30, red light can be enhanced and the color temperature can be reduced. By adjusting the proportion of red phosphor in the fluorescent adhesive 30, the color temperature of the light can be adjusted.

[0035] In some embodiments, the emission peak wavelength of the red phosphor is 620nm-630nm, and the mass ratio of the yellow phosphor to the red phosphor is greater than or equal to 10. With the emission wavelength of the blue light-emitting unit 10 selected as 450nm-455nm, the emission wavelength of the red light-emitting unit 20 selected as 620nm-625nm, the peak intensity ratio of the relative spectra of the blue light-emitting unit 10 and the red light-emitting unit 20 during emission being 1 to 3, and the emission peak wavelength of the yellow phosphor selected as 560nm-570nm, the emission peak wavelength of the red phosphor is selected as 620nm-630nm, and the mass ratio of the yellow phosphor to the red phosphor is controlled to be greater than or equal to 10. This further reduces the blue light component and color temperature, resulting in golden light where the blue light component accounts for ≤0.5% of the total spectrum, and the light color temperature is between 1700K and 2400K. The emission peak wavelength of the red phosphor is close to or equal to the emission wavelength of the red light-emitting unit 20, which effectively maintains the spectral structure and reduces the color temperature.

[0036] In one specific embodiment, there is one blue light emitting unit 10 with an emission wavelength of 452.5nm-455nm, and one red light emitting unit 20 with an emission wavelength of 622.5nm-625nm. The phosphor is a combination of yellow and red phosphors, with the yellow phosphor having an emission peak wavelength of 560nm and the red phosphor having an emission peak wavelength of 620nm. The mass ratio of yellow to red phosphor is 20:1, and the phosphor accounts for 70% of the phosphor in the fluorescent adhesive 30. The resulting golden light has a blue light component accounting for ≤0.5% of the total spectrum, a color temperature of 2100K, a color rendering index Ra of 78, a luminous flux of 30lm, and a luminous efficacy of 112lm / W.

[0037] In another specific embodiment, there is one blue light emitting unit 10 with an emission wavelength of 452.5nm-455nm, and one red light emitting unit 20 with an emission wavelength of 622.5nm-625nm. The phosphor is a combination of yellow and red phosphors, with the yellow phosphor having an emission peak wavelength of 570nm and the red phosphor having an emission peak wavelength of 620nm. The mass ratio of yellow to red phosphor is 10:1, and the phosphor accounts for 70% of the phosphor in the fluorescent adhesive 30. The resulting golden light has a blue light component accounting for ≤0.5% of the total spectrum, a color temperature of 1800K, a color rendering index Ra of 80, a luminous flux of 30lm, and a luminous efficacy of 110lm / W.

[0038] In some embodiments, such as Figure 1 As shown, the golden light emitting device also includes a support 40, which has a bowl-shaped cup. Both the blue light emitting unit 10 and the red light emitting unit 20 are placed inside the bowl-shaped cup, and fluorescent adhesive 30 is filled inside. By placing the bowl-shaped cup on the support 40, simultaneously placing the blue light emitting unit 10 and the red light emitting unit 20 inside, and filling the bowl-shaped cup with fluorescent adhesive 30 to cover the blue light emitting unit 10 and the red light emitting unit 20, the uniformity of light mixing can be improved. The manufacturing method of the golden light emitting device is as follows: A bracket 40, a blue light emitting unit 10, and a red light emitting unit 20 are provided. The blue light emitting unit 10 and the red light emitting unit 20 are placed in the cup of the bracket 40, and the blue light emitting unit 10 and the red light emitting unit 20 are connected in series or in parallel. Fluorescent adhesive 30 is provided; transparent adhesive and fluorescent powder are thoroughly mixed to obtain fluorescent adhesive 30. The fluorescent adhesive 30 is filled into the cup of the bracket 40, covering the blue light emitting unit 10 and the red light emitting unit 20. The device is then baked and cured to obtain the golden light emitting device. The material of the bracket 40 is not limited. For example, the bracket 40 can be a PCT (Polycarbonate) bracket 40, an EMC (Epoxy Molding Compound) bracket 40, or a ceramic bracket 40, which has good heat dissipation performance and is suitable for high-power streetlights.

[0039] In some embodiments, such as Figure 1As shown, there are multiple red light emitting units 20, and these units are arranged around the blue light emitting unit 10. By arranging multiple red light emitting units 20, the red light can be enhanced, effectively reducing the color temperature of the light. Furthermore, by arranging the multiple red light emitting units 20 around the blue light emitting unit 10, the red light emitted by the red light emitting units 20 and the yellow light generated by the phosphor excited by the blue light emitted by the blue light emitting units 10 can be mixed uniformly to obtain a uniform golden light. Specifically, the multiple red light emitting units 20 can be evenly distributed around the blue light emitting unit 10 to improve the uniformity of light mixing, ensuring that the uniformity of light mixing is greater than or equal to 90%.

[0040] In some embodiments, such as Figure 1 As shown, the fluorescent adhesive 30 includes a bottom layer 31 and a top layer 32. The bottom layer 31 covers the blue light-emitting unit 10 and the red light-emitting unit 20, and contains yellow phosphor. The top layer 32 covers the side of the bottom layer 31 facing away from the blue light-emitting unit 10 and the red light-emitting unit 20, and contains red phosphor. During operation, the blue light emitted by the blue light-emitting unit 10 first enters the bottom layer 31, exciting the yellow phosphor within the bottom layer 31 to produce yellow light. The yellow light passes through the top layer 32. The red light emitted by the red light-emitting unit 20 passes through the bottom layer 31 and the top layer 32, mixing with the yellow light to produce golden light. This layered coating process improves the excitation efficiency of the phosphor, enhances spectral continuity, and increases the color rendering index Ra. Specifically, the thickness of the bottom layer 31 is greater than the thickness of the top layer 32, which facilitates increasing the proportion of yellow phosphor in the phosphor, allowing the blue light emitted by the blue light-emitting unit 10 to fully excite the yellow phosphor to produce yellow light, thereby effectively reducing the blue light component.

[0041] In some embodiments, the golden light emitting device further includes a lamp panel, on which multiple light source modules are disposed. Each light source module includes a bracket 40, a blue light emitting unit 10, a red light emitting unit 20, and fluorescent adhesive 30. The multiple light source modules can be arranged in a rectangular array or a circular array on the lamp panel.

[0042] In one embodiment, the golden light emitting device further includes a lamp post and a lamp fixture, with the lamp fixture disposed at the top of the lamp post. The lamp fixture includes a lamp housing, a lamp panel, and a light source module, with the lamp panel disposed within the lamp housing.

[0043] It should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A golden light emitting device, characterized in that, It includes a blue light emitting unit, a red light emitting unit, and a fluorescent adhesive. The fluorescent adhesive covers the blue light emitting unit and the red light emitting unit. The fluorescent adhesive contains yellow phosphor. The blue light emitting unit, the red light emitting unit, and the fluorescent adhesive work together to emit golden yellow light with a color temperature of 1700K-2500K.

2. The golden light emitting device according to claim 1, characterized in that: The fluorescent adhesive also contains red fluorescent powder.

3. The golden light emitting device according to claim 1, characterized in that: The blue light emitting unit has an emission wavelength of 450nm-455nm, the red light emitting unit has an emission wavelength of 620nm-625nm, and the ratio of the peak intensity of the blue light emitting unit to the red light emitting unit in the relative spectrum when emitting light is 1 to 3; the yellow phosphor has an emission peak wavelength of 560nm-570nm.

4. The golden light emitting device according to claim 3, characterized in that: The fluorescent adhesive also contains red phosphor, the emission peak wavelength of which is 620nm-630nm, and the mass ratio of the yellow phosphor to the red phosphor is greater than or equal to 10.

5. The golden light emitting device according to claim 1, characterized in that: The golden light emitting device also includes a support frame, which has a bowl cup. The blue light emitting unit and the red light emitting unit are both disposed in the bowl cup, and the fluorescent adhesive is filled in the bowl cup.

6. The golden light emitting device according to claim 5, characterized in that: The number of red light emitting units is multiple, and the multiple red light emitting units are arranged around the blue light emitting unit.

7. The golden light emitting device according to claim 5, characterized in that: The fluorescent adhesive includes a bottom layer and a top layer. The bottom layer covers the blue light-emitting unit and the red light-emitting unit, and contains the yellow phosphor. The top layer covers the side of the bottom layer opposite to the blue light-emitting unit and the red light-emitting unit, and contains the red phosphor.

8. The golden light emitting device according to claim 7, characterized in that: The thickness of the bottom layer is greater than the thickness of the top layer.

9. The golden light emitting device according to claim 5, characterized in that: The support is a PCT support, an EMC support, or a ceramic support.

10. The golden light emitting device according to any one of claims 1-9, characterized in that: Both the blue light emitting unit and the red light emitting unit are LED light-emitting chips.

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