Sky blue spectrum LED light source

Abstract

The utility model belongs to the technical field of LEDs, and particularly relates to a sky blue spectrum LED light source, which comprises a plurality of LED wafers, a support, silica gel and fluorescent glue, the support is provided with a bowl cup, a positive electrode and a negative electrode, the plurality of LED wafers are arranged in the bowl cup, the LED wafers are connected with the positive electrode and the negative electrode through gold wire bonding, and the fluorescent glue is coated on the LED wafers; the plurality of LED wafers comprise a first LED wafer, a second LED wafer and a third LED wafer; the sky blue spectrum LED light source provided by the utility model is matched with natural light sky blue SSI (350-830nm) gt; 95, SSI (430-690 nm) gt; and the color of natural light is restored, so that people can experience nature and enjoy sunshine bath, the blue light exemption RG0 standard is met, and the eye protection spectrum is healthier.

Description

Technical Field

[0001] The utility model relates to the technical field of LEDs, in particular to a sky blue spectrum LED light source. Background Art

[0002] Before the emergence of artificial light sources, sunlight was the only light source. Our ancestors worked from sunrise to sunset and rested from sunset to sunrise, relying on the sun to live. Sunlight not only provides lighting and energy for the earth, but also regulates human physiological rhythms, affects human biology, psychology, and human body. The life process and evolution of surface organisms have long relied on sunlight. However, modern urbanites, especially office workers, stay indoors for a long time and are rarely exposed to sunlight, so they cannot benefit from the sun.

[0003] With the development of LED lighting technology and market, the LED light source technology that simulates sunlight has been studied by different institutions and enterprises. However, the spectrum of simulated sunlight is varied, which can only be similar in appearance but not in spirit, and is extremely harmful to human eyes and cannot pass the RG0 standard. Utility Model Content

[0004] The purpose of the utility model is to provide a sky blue spectrum LED light source, which can at least solve one of the problems existing in the above-mentioned prior art.

[0005] The utility model adopts the following technical solutions to solve the above technical problems: providing a sky blue spectrum LED light source, including a plurality of LED chips, a bracket, silica gel and fluorescent glue, the bracket having a bowl and positive and negative electrodes, the plurality of LED chips are arranged in the bowl, and each LED chip is connected to the positive and negative electrodes by gold wire bonding, and the fluorescent glue is coated on each LED chip;

[0006] The plurality of LED chips include a first LED chip with a main wavelength of 440-445 nm, a second LED chip with a main wavelength of 450-455 nm, and a third LED chip with a main wavelength of 465-470 nm.

[0007] Optionally, a boss is provided in the middle of the bowl, the third LED chip is provided on the boss, and the first LED chip and the second LED chip are respectively located below two opposite sides of the third LED chip.

[0008] Optionally, the height of the boss is 0.1 mm. The design of the boss protrudes the 465-470nm chip (the third LED chip), which is beneficial for the eyes to contact this part of photons, thereby improving the M / P and S / P values ​​of the product, thereby effectively protecting the human eyes. And it also greatly improves the brightness of the product.

[0009] Optionally, the positive and negative electrodes are both arranged on the bottom side of the bracket, and the positive and negative electrodes do not extend out of the bracket. This design can make the sky blue spectrum LED light source occupy a smaller installation area, which is conducive to miniaturized design, compact and beautiful. In addition, the overall area of ​​the positive and negative electrodes can be increased, the heat dissipation area can be increased, the thermal resistance can be reduced, and thus the heat dissipation can be improved.

[0010] Optionally, the area ratio of the positive electrode to the negative electrode of the positive and negative electrodes is 3:7.

[0011] Optionally, the top edge of the bowl is chamfered to improve the light effect of the sky blue spectrum LED light source.

[0012] Compared with the prior art, the sky blue spectrum LED light source of the utility model has the following beneficial effects: SSI (350-830nm)>95, SSI (430-690nm)>97 with natural light sky blue, excellent spectral similarity parameters, restore the color of natural light, let people experience nature, enjoy the sun bath, meet the blue light exemption RG0 standard, and the eye protection spectrum is healthier. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front schematic diagram of the structure of a sky blue spectrum LED light source provided by an embodiment of the utility model.

[0014] Figure 2 It is a schematic diagram of the back structure of the sky blue spectrum LED light source provided by an embodiment of the utility model.

[0015] Figure 3 A cross-sectional view of a sky blue spectrum LED light source provided by an embodiment of the utility model.

[0016] Figure 4 It is a bare crystal luminescence spectrum curve diagram of the sky blue spectrum LED light source provided by the embodiment of the utility model.

[0017] Figure 5 It is a luminous spectrum curve diagram of a finished product of a sky blue spectrum LED light source provided by an embodiment of the utility model.

[0018] Figure 6 This is a test report of the sky blue spectrum LED light source provided by the embodiment of the utility model.

[0019] Figure 7 It is the chromaticity landing point bin diagram requirement index of the sky blue spectrum LED light source product provided by the embodiment of the utility model.

[0020] Reference numerals:

[0021] 10—positive and negative electrodes 11—first LED chip 12—second LED chip

[0022] 13—third LED chip 14—bowl 15—bracket

[0023] 16—fluorescent glue 17—boss. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-7 The technical solution of the utility model is further described in detail. It should be understood that these embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model. Although this specification is described according to the implementation mode, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The various embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0025] like Figures 1 to 3 As shown, an embodiment of the utility model provides a sky blue spectrum LED light source, including multiple LED chips, a bracket 15, silica gel and fluorescent glue 16, the bracket 15 has a bowl cup 14 and positive and negative electrodes 10, the multiple LED chips are arranged in the bowl cup 14, and each LED chip is connected to the positive and negative electrodes 10 by gold wire bonding, and the fluorescent glue 16 is coated on each LED chip.

[0026] The plurality of LED chips include a first LED chip 11 with a main wavelength of 440-445 nm, a second LED chip 12 with a main wavelength of 450-455 nm, and a third LED chip 13 with a main wavelength of 465-470 nm.

[0027] In another embodiment of the present invention, see Figure 1 and 3 A boss 17 is provided in the middle of the bowl 14, the third LED chip 13 is provided on the boss 17, and the first LED chip 11 and the second LED chip 12 are respectively located below two opposite sides of the third LED chip 13. The design of the boss 17 can place the third LED chip 13 at a higher position, which is conducive to the eyes contacting this part of photons and also greatly improves the brightness of the product.

[0028] Further, see Figure 3 The height of the boss 17 is 0.1 mm. The design of the boss 17 realizes the protrusion of the 465-470nm chip, which is conducive to the eyes contacting this part of photons, thereby improving the M / P and S / P values ​​of the product, thereby effectively protecting the human eye. And it also greatly improves the brightness of the product.

[0029] In another embodiment of the present invention, see Figure 2 , the positive and negative electrodes 10 are both arranged on the bottom side of the bracket 15, and the positive and negative electrodes 10 do not extend out of the bracket 15. This design can make the sky blue spectrum LED light source installation occupy a smaller area, which is conducive to miniaturized design, compact and beautiful. In addition, the overall area of ​​the positive and negative electrodes 10 can be increased, the heat dissipation area is increased, the thermal resistance is reduced, and thus the heat dissipation is improved.

[0030] Preferably, see Figure 2 , the positive electrode of the positive and negative electrodes 10 ( Figure 2 Upper position) and negative pole ( Figure 2 The area ratio of the positive and negative electrodes 10 is 3:7. This can maximize the design of the positive and negative electrodes 10 without extending beyond the bracket.

[0031] In another embodiment of the present invention, see Figure 1 The top edge of the bowl 14 is chamfered. The chamfered design can improve the light effect of the sky blue spectrum LED light source.

[0032] Furthermore, the fluorescent glue 16 includes blue powder, green powder, red powder and infrared fluorescent powder, and the color quality of the LED light formed in the bowl cup 14 satisfies that the S / P ratio and M / P ratio are higher than the sunlight of the same color temperature, the color temperature satisfies the specified chromaticity standard coordinates, the chromaticity coordinates meet the 3-order color tolerance chromaticity standard, the SSI coefficient of similarity with the natural sky blue spectrum is greater than 95%, and the blue light hazard efficiency K B，V =0.000770122, which is the blue light hazard efficiency K of sunlight with the same color temperature B，V Low, meets the blue light exemption RG0 standard.

[0033] It should be noted that the blue light hazard efficiency K B，V To calculate, that is, the blue light hazard weighted radiance L B The ratio of the corresponding photometric value is calculated as:

[0034]

[0035] Among them, K m =683lm / W, V(λ) is the spectral luminous efficiency (or visibility function), and B(λ) is the blue light hazard weighting function. K B，V Characterizes the relative amount of blue light components in visible radiation. When the brightness of lighting products is the same, K B，V The higher it is, the more likely the light source is to harm the retina.

[0036] In another embodiment of the present invention, Figures 1 to 5As shown, the bare crystal peak spectral energy ratio of the first LED chip 11 with a main wavelength of 440-445nm, the second LED chip 12 with a main wavelength of 450-455nm and the third LED chip 13 with a main wavelength of 465-470nm is: Фe(440-445nm):Фe(450-455nm):Фe(475-485nm)=(0.5-0.7):(0.8-1.0):(0.8-1.0). Specifically, the bare crystal peak spectral energy ratio of the first LED chip 11, the second LED chip 12 and the third LED chip 13 can be: Фe (440-445nm): Фe (450-455nm): Фe (475-485nm) = 0.5:0.8:0.8, or Фe (440-445nm): Фe (450-455nm): Фe (475-485nm) = 0.7:1.0:1.0, or Фe (440-445nm): Фe (450-455nm): Фe (475-485nm) = 0.6:0.9:0.9.

[0037] In another embodiment of the utility model, the fluorescent glue 16 is formed by preparing a 6500K fluorescent glue solution, which is a mixture of glue and blue powder with an emission wavelength of 475-485nm, green powder with an emission wavelength of 530-540nm, red powder with an emission wavelength of 630-640nm and infrared fluorescent powder with an emission wavelength of 745-755nm.

[0038] In another embodiment of the utility model, the 6500K fluorescent glue solution is prepared by the ratio of glue: blue powder with an emission wavelength of 480nm: green powder with an emission wavelength of 535nm: phosphor with an emission wavelength of 635nm: infrared phosphor with an emission wavelength of 750nm = 3: (0.05-0.15): (0.5-0.7): (0.03-0.05): (1.0-1.2). For example, the 6500K fluorescent glue solution is prepared by the ratio of glue: blue powder with an emission wavelength of 480nm: green powder with an emission wavelength of 535nm: phosphor with an emission wavelength of 635nm: infrared phosphor with an emission wavelength of 750nm = 3: 0.05: 0.5: 0.03: 1.0, or = 3: 0.15: 0.7: 0.05: 1.2, or = 3: 0.1: 0.6: 0.04: 1.1.

[0039] Preferably, the blue powder with an emission wavelength of 475-485 nm is Lu3Al5O 12 :Ce 3+ Ingredients: The green powder having an emission wavelength of 530-540 nm is Lu3Al5O 12 :Ce 3+The red powder with an emission wavelength of 635-645nm is CaAlSiN3:Eu; the infrared phosphor with an emission wavelength of 745-755nm is Ga4GeO8:Cr 3+ Element.

[0040] The light color quality of the sky blue spectrum LED light source formed by the above structure and configuration of the utility model meets the spectral energy ratio of: Ф e (350-399nm): Ф e (400-499nm): Ф e (500-599nm): Ф e (600-699nm): Ф e (700-1000nm)=(0.0%-0.1%): (25%-27%): (26%-28%): (26%-27%): (19.5%-20.5%).

[0041] In another embodiment of the present invention, the LED light color quality satisfies the following relative spectrum height: 600-730nm≥0.4; the peak wavelength is 470-480nm. In this way, the sky blue spectrum LED light source of the present invention embodiment has a superior spectrum continuity effect, which is beneficial to inhibit the growth of the eye axis, thereby achieving myopia protection function.

[0042] In another embodiment of the utility model, the LED light color quality satisfies the spectrum from 350-800nm ​​continuous, and the 650-730nm energy height>0.4. It helps to protect the eyes and activate the conversion of eye macromolecules into small molecule water, thereby playing the role of moisturizing and protecting the eyes.

[0043] In another embodiment of the utility model, the LED light color quality satisfies the existence of a small wave peak in the 700-800nm ​​spectrum, which plays a role in micro-infrared light stimulation, protecting the eyes and making them healthier.

[0044] The present invention also provides a method for preparing a sky blue spectrum LED light source, comprising the following steps:

[0045] Step S100: The first LED chip 11 with a main wavelength of 440-445nm, the second LED chip 12 with a main wavelength of 450-455nm, and the third LED chip 13 with a main wavelength of 465-470nm are arranged in the bowl 14, and fixed on the bracket 15 by a die bonding machine through insulating glue or silver glue, and baked in an oven at 150-160°C for 2h±10min after the die bonding, so that the first LED chip 11 with a main wavelength of 440-445nm, the second LED chip 12 with a main wavelength of 450-455nm, and the third LED chip 13 with a main wavelength of 465-470nm are completely fixed in the bowl 14;

[0046] Step S200: connecting the first LED chip 11 with a main wavelength of 440-445 nm, the second LED chip 12 with a main wavelength of 450-455 nm, and the third LED chip 13 with a main wavelength of 465-470 nm to the positive and negative electrodes 10 by gold wire bonding using a gold wire bonding machine;

[0047] Step S300: preparing a fluorescent glue solution, wherein the fluorescent glue solution is a mixture of glue and blue powder, green powder, red powder and infrared fluorescent powder;

[0048] Step S400: pour the prepared fluorescent glue solution into the glue barrel of the glue dispensing machine. After the glue and bubbles are discharged, the fluorescent glue solution is dispensed into the bowl 14 according to the color parameter requirements. After the dispensing is completed, it is baked at 80℃ / 0.5H+160℃ / 4H.

[0049] Step S500: After the LED is threshed after baking, it is spectroscopically tested according to the given color parameters, so that the LED light color quality formed in the bowl cup 14 meets the S / P ratio and M / P ratio higher than the sunlight of the same color temperature, the color temperature meets the specified chromaticity standard coordinates, the chromaticity coordinates meet the 3-order color tolerance chromaticity standard, the SSI coefficient of similarity with the natural sky blue spectrum is greater than 95%, and the blue light hazard efficiency K B，V =0.000770122, which is the blue light hazard efficiency K of sunlight with the same color temperature B，V Low, meets the blue light exemption RG0 standard.

[0050] in, Figure 7 It is the chromaticity landing point bin diagram requirement index of the sky blue spectrum LED light source product provided by the embodiment of the utility model.

[0051] Furthermore, the sky blue spectrum LED light source produced by the above-mentioned preparation method of this embodiment can be reflected according to the following five tables in comparison with sunlight.

[0052] Among them, Table 1 is a distribution diagram of the sky blue spectrum LED light source and the solar spectrum provided in an embodiment of the utility model.

[0053] Spectral bands 350-399nm 400-499nm 500-599nm 600-699nm 700-1000nm The utility model content 5.58052E-05 0.022220862 0.02323442 0.02262511 0.017236484 The proportion of this utility model 0.07％ 26.03％ 27.22％ 26.50％ 20.19％

[0054] Table 1

[0055] Among them, Table 2 is a comparison of the sky blue spectrum LED light source provided by the embodiment of the utility model and the sunlight 6500KS / Pratio and M / P ratio.

[0056]

[0057] Table 2

[0058] Among them, Table 3 is the blue light hazard efficiency K of the sky blue spectrum LED light source and sunlight 6500K provided by the embodiment of the utility model B，V Comparison table of .

[0059] project <![CDATA[K B，V ]]> 6500K sunlight 0.00096426 The utility model 0.000770122 <![CDATA[Comparison (K B，V(本实用新型) / K B，V(6000Ksunlight) > 79.87％

[0060] Table 3

[0061] Among them, Table 4 is a spectral parameter table of the sky blue spectrum LED light source provided by an embodiment of the utility model.

[0062]

[0063] Table 4

[0064] Furthermore, after testing the sky blue spectrum LED light source of the embodiment of the utility model, the photobiological hazard type test (IECIEC 62471:2006) results thereof can be shown in Table 5 below:

[0065]

[0066]

[0067] Table 5

[0068] It can be seen that the sky blue spectrum LED light source provided by the embodiment of the utility model has at least the following beneficial effects:

[0069] 1. With the sky blue SSI (350-830nm)>95, SSI (430-690nm)>97 of natural light, the spectrum similarity parameters are excellent, which can restore the color of natural light, allowing people to experience nature and enjoy the sun bathing;

[0070] 2. Blue light hazard efficiency K B，V =0.000770122, which is the blue light hazard efficiency K of sunlight with the same color temperature B，VLow (K B，V / K B，V (6500K sunlight) = 79.87%), in line with the blue light exemption RG0 standard, the eye protection spectrum is healthier;

[0071] 3. The peak wavelength of the spectrum is 470-480nm, which conforms to the non-visual spectrum brightness function, inhibits the secretion of melatonin, and makes people more energetic;

[0072] 4. The 600-700nm spectrum height is above 0.4, and the excellent spectrum continuity effect is conducive to inhibiting the growth of the eye axis, thereby achieving myopia protection function;

[0073] 5. S / Pratio (dark-light visual brightness ratio) is 18.7% higher than sunlight with the same color temperature of 6500K, providing a clearer field of vision, higher visual efficiency, and clearer viewing;

[0074] 6. The M / P ratio (non-photopic brightness ratio) is 23.03% higher than the sunlight with the same color temperature of 6500K, which makes people more energetic and provides a bright and abundant visual environment, making people happy physically and mentally;

[0075] 7. The spectrum is continuous from 350-800nm, and the energy height of 650-730nm is >0.4, which helps to protect the eyes and activate the conversion of large molecules of the eyes into small molecules of water, thereby playing a role in moisturizing and protecting the eyes;

[0076] 8. There is a small wave peak in the 700-800nm ​​spectrum, which stimulates the eyes with micro-infrared light and protects them healthier.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sky blue spectrum LED light source, characterized in that: It includes a plurality of LED chips, a bracket, silica gel and fluorescent glue, wherein the bracket has a bowl and positive and negative electrodes, the plurality of LED chips are arranged in the bowl, and each LED chip is connected to the positive and negative electrodes by gold wire bonding, and the fluorescent glue is coated on each LED chip; The plurality of LED chips include a first LED chip with a main wavelength of 440-445 nm, a second LED chip with a main wavelength of 450-455 nm, and a third LED chip with a main wavelength of 465-470 nm.

2. The sky blue spectrum LED light source according to claim 1, characterized in that: A boss is arranged in the middle of the bowl, the third LED chip is arranged on the boss, and the first LED chip and the second LED chip are respectively located below two opposite sides of the third LED chip.

3. The sky blue spectrum LED light source according to claim 2, characterized in that: The height of the boss is 0.1 mm.

4. The sky blue spectrum LED light source according to claim 2, characterized in that: The positive and negative electrodes are both arranged on the bottom side of the bracket, and the positive and negative electrodes do not extend out of the bracket.

5. The sky blue spectrum LED light source according to claim 4, characterized in that: The area ratio of the positive electrode to the negative electrode of the positive and negative electrodes is 3:

7.

6. The sky blue spectrum LED light source according to any one of claims 1 to 5, characterized in that: The top edge of the bowl is chamfered.

Images