3V stepless dimming infrared warm white LED structure

Abstract

The present invention belongs to the field of LED technology, and in particular relates to a 3V stepless dimming infrared warm white light LED structure, comprising a first LED light source, a second LED light source, and a third LED light source connected in series, parallel, or series-parallel; the first LED light source comprises a first LED chip and a first fluorescent glue, the first fluorescent glue comprising a mixture of glue, green powder, red powder, and infrared fluorescent powder; the second LED light source comprises a second LED chip and a second fluorescent glue, the second fluorescent glue comprising a mixture of glue, green powder, red powder, and infrared fluorescent powder; the third LED light source comprises a third LED chip and a third fluorescent glue, the third fluorescent glue comprising a mixture of glue, green powder, red powder, and infrared fluorescent powder. The 3V stepless dimming infrared LED structure provided in an embodiment of the present invention can effectively solve the problem of unstable dimming spectrum existing in LED light source products in the prior art, while saving the production cost of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of LEDs, in particular to a 3V stepless dimming infrared warm white light LED structure. Background Art

[0002] The existing 3V infrared LED light source generally uses three LED chips packaged together, such as Figure 1 As shown, the illustrated structure includes pins 10, an LED chip 11 with a dominant wavelength of 440-445nm, an LED chip 12 with a dominant wavelength of 450-455nm, an LED chip with a dominant wavelength of 460-470nm, a bowl 14, and a bracket 15. Furthermore, the test data of the above-mentioned existing LED light source with a light color of 2700K and infrared is shown in Table 1 below:

[0003]

[0004] Among them, the Ra, R9, and R12 of the existing LED light source are unstable, resulting in unstable color quality. Figure 2 As can be seen, the spectrum of these existing LED light sources is unstable from low to high current. The lower the current, the more unstable the spectrum. Furthermore, after dimming, the large spectrum fluctuations result in unpleasant light colors, which is extremely annoying for users. Therefore, they are extremely unsuitable for dimming lighting products. Summary of the Invention

[0005] The purpose of the present invention is to provide a 3V stepless dimming infrared warm white light LED structure, which can solve the problems existing in the above-mentioned prior art, has the advantages of stable dimming spectrum, and can save production costs.

[0006] The present invention adopts the following technical solutions to solve the above technical problems: providing a 3V stepless dimming infrared warm white LED structure, comprising a first LED light source, a second LED light source and a third LED light source connected in series, in parallel or in series and in parallel;

[0007] The first LED light source includes a first LED chip and a first fluorescent glue encapsulating the first LED chip, the main wavelength of the first LED chip is 440-445nm, and the first fluorescent glue includes glue, green powder with an emission peak wavelength of 520-540nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm.

[0008] The second LED light source includes a second LED chip and a second fluorescent glue encapsulating the second LED chip, the main wavelength of the second LED chip is 450-455nm, and the second fluorescent glue includes glue, green powder with an emission peak wavelength of 520-540nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm.

[0009] The third LED light source includes a third LED chip and a third fluorescent glue that encapsulates the third LED chip. The main wavelength of the third LED chip is 460-470nm. The third fluorescent glue includes glue, green powder with an emission peak wavelength of 530-545nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared fluorescent powder with an emission peak wavelength of 700-770nm.

[0010] Optionally, the number ratio of the first LED light source: the second LED light source: the third LED light source=(1-2):(1-2):1.

[0011] Optionally, in the first fluorescent glue, the mass ratio of glue: green powder with an emission peak wavelength of 520-540nm: red powder with an emission peak wavelength of 650-670nm: red powder with an emission peak wavelength of 630-640nm: infrared phosphor with an emission peak wavelength of 700-770nm is 11: (9.5-10.5): (0.35-0.5): (0.5-0.7): (2.5-3.5).

[0012] Optionally, in the second fluorescent glue, the mass ratio of glue: green powder with an emission peak wavelength of 520-540nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm is 11: (9.5-10.5): (0.35-0.5): (0.45-0.7): (4.8-5.8).

[0013] Optionally, in the third fluorescent glue, the mass ratio of glue: green powder with an emission peak wavelength of 530-545nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm is 11: (10.8-12.2): (0.35-0.5): (0.4-0.6): (3.1-4.1).

[0014] Optionally, the composition of the green powder with an emission peak wavelength of 520-540 nm is Lu3Al5O 12 :Ce 3+ , half-wave width is 80-120nm; the red powder with an emission peak wavelength of 650-670nm is composed of CaAlSiN3:Eu, and the half-wave width is 80-120nm; the red powder with an emission peak wavelength of 630-640nm is composed of CaAlSiN3:Eu, and the half-wave width is 40-80nm; the infrared phosphor with an emission wavelength of 700-770nm is composed of Ga4GeO8:Cr 3+ , half-wave width is 120-180nm.

[0015] Optionally, the composition of the green powder with an emission peak wavelength of 520-540 nm is Lu3Al5O 12 :Ce 3+ , half-wave width is 80-120nm; the red powder with an emission peak wavelength of 650-670nm is composed of CaAlSiN3:Eu, and the half-wave width is 80-120nm; the red powder with an emission peak wavelength of 630-640nm is composed of CaAlSiN3:Eu, and the half-wave width is 40-80nm; the infrared phosphor with an emission wavelength of 700-770nm is composed of Ga4GeO8:Cr 3+ , half-wave width is 120-180nm.

[0016] Optionally, the composition of the green powder with an emission peak wavelength of 530-545 nm is Lu3Al5O 12 :Ce 3+ Green powder, half-wave width is 80-120nm; red powder with emission peak wavelength of 650-670nm is composed of CaAlSiN3:Eu, half-wave width is 80-120nm; red powder with emission peak wavelength of 630-640nm is composed of CaAlSiN3:Eu, half-wave width is 40-80nm; infrared phosphor with emission wavelength of 700-770nm is composed of Ga4GeO8:Cr 3+ , half-wave width is 120-180nm.

[0017] Compared with the prior art, the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention has at least the following beneficial effects:

[0018] 1. The SSI (350-830nm) spectrum similarity of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention to the same color temperature of 2700K is greater than 90%;

[0019] 2. The 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention has a combined light Ra>95 and R1-R15>90;

[0020] 3. The TLCI-2012 TV Lighting Index of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention is >98;

[0021] 4. The GAI-BB relative blackbody trajectory color gamut index of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention is greater than 92;

[0022] 5. The TM-30-15 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention has Rg>95, Rf>97, and Rf,skin>95;

[0023] 6. The S / P Ratio and M / P ratio of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention are basically the same as those of sunlight with the same color temperature, providing a healthier rhythm and a clearer field of vision.

[0024] 7. Blue light hazard efficiency K of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention B，V Lower than the same color temperature of 2700K, low blue light hazard, meets the IEC-62471RGO exemption requirements, and is healthier for eyes.

[0025] The 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention can effectively solve the problem of unstable dimming spectrum in the LED light source products in the prior art, while saving the production cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of a 3V LED light source in the prior art.

[0027] Figure 2 This is a graph showing how the spectrum of a 3V LED light source in the prior art changes with current.

[0028] Figure 3 This is a schematic diagram of the 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0029] Figure 4 This is a circuit diagram of the 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0030] Figure 5 This is a spectrum diagram of the first LED chip of the 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0031] Figure 6 This is a spectrum test report diagram of the first LED chip of the 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0032] Figure 7 This is a comparison chart of the blue light hazard efficiency of the first LED chip of the 3V stepless dimming infrared warm white LED structure provided by an embodiment of the present invention.

[0033] Figure 8 This is a spectrum diagram of the second LED chip of the 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0034] Figure 9 This is a spectrum test report diagram of the second LED chip of the 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0035] Figure 10 This is a comparison chart of the blue light hazard efficiency of the second LED chip of the 3V stepless dimming infrared warm white LED structure provided by an embodiment of the present invention.

[0036] Figure 11 This is a spectrum diagram of the third LED chip of the 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0037] Figure 12 This is a spectrum test report diagram of the third LED chip of the 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0038] Figure 13 This is a comparison chart of the blue light hazard efficiency of the third LED chip of the 3V stepless dimming infrared warm white LED structure provided by an embodiment of the present invention.

[0039] Figure 14 This is a spectrum diagram of a 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0040] Figure 15 This is a comparison chart of the blue light hazard efficiency of a 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0041] Figure 16 This is a graph showing how the spectrum of a 3V stepless dimming infrared warm white light LED structure varies with current, provided by an embodiment of the present invention.

[0042] Figure 17 This is a binning diagram of the 3V stepless dimming infrared warm white light LED structure provided by an embodiment of the present invention.

[0043] Reference numerals:

[0044] 11 - first LED chip 12 - second LED chip 13 - third LED chip 14 - bowl 15 - bracket. DETAILED DESCRIPTION

[0045] The following is combined with Figure 3-17 The technical solutions of the present invention will be described in further detail. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The embodiments may also be appropriately combined to form other embodiments that are understandable to those skilled in the art.

[0046] 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 follows:

[0047]

[0048] 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 the value, the more likely the light source is to cause damage to the retina.

[0049] It should be noted that the rated voltage of LED chips with a main wavelength of 440-480nm is between 2.6-3.3V, which is commonly referred to as a 3V light source in the industry.

[0050] like Figures 3-4 As shown, an embodiment of the present invention provides a 3V stepless dimming infrared warm white light LED structure, which includes a first LED light source, a second LED light source and a third LED light source connected in series, in parallel or in series and parallel.

[0051] The first LED light source includes a first LED chip and a first fluorescent glue that encapsulates the first LED chip. The main wavelength of the first LED chip is 440-445nm. The first fluorescent glue includes glue, green powder with an emission peak wavelength of 520-540nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm and infrared fluorescent powder with an emission peak wavelength of 700-770nm.

[0052] The second LED light source includes a second LED chip and a second fluorescent glue that encapsulates the second LED chip. The main wavelength of the second LED chip is 450-455nm. The second fluorescent glue includes glue, green powder with an emission peak wavelength of 520-540nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared fluorescent powder with an emission peak wavelength of 700-770nm.

[0053] The third LED light source includes a third LED chip and a third fluorescent glue that encapsulates the third LED chip. The main wavelength of the third LED chip is 460-470nm. The third fluorescent glue includes glue, green powder with an emission peak wavelength of 530-545nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared fluorescent powder with an emission peak wavelength of 700-770nm.

[0054] See Figure 3 As shown, the first, second, and third LED light sources each further include a pin 10, a cup 14, and a bracket 15. A first LED chip 11 with a dominant wavelength of 440-445 nm is encapsulated in the cup 14 of the first LED light source, a second LED chip 12 with a dominant wavelength of 450-455 nm is encapsulated in the cup 14 of the second LED light source, and a third LED chip with a dominant wavelength of 450-455 nm is encapsulated in the cup 14 of the third LED light source.

[0055] The 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention can effectively solve the problem of unstable dimming spectrum in the LED light source products in the prior art, while saving the production cost of the product.

[0056] Specifically, the number ratio of the first LED light source: the second LED light source: the third LED light source=(1-2):(1-2):1.

[0057] For example, when the ratio of the first LED light source: the second LED light source: the third LED light source is 1:1:1 (see Figure 4 ), the mixed spectrum effect is shown in Figure 14 , mixed light source data is shown in Table 2 below:

[0058]

[0059]

[0060] Its blue light hazard efficiency is K B，V See Figure 15, it can be seen that the blue light hazard efficiency K of the LED structure of the embodiment of the present invention is B，V Significantly lower than the blue light hazard efficiency of sunlight with the same color temperature of 2700K B，V , low blue light hazards, meets IEC-62471RGO exemption requirements, and protects eyes more healthily.

[0061] For another example, when the ratio of the first LED light source: the second LED light source: the third LED light source is 1:2:1 (see Figure 4 ), the mixed light source data is shown in Table 3 below:

[0062]

[0063]

[0064] For another example, when the ratio of the first LED light source: the second LED light source: the third LED light source is 2:2:1 (see Figure 4 ), the mixed light source data is shown in Table 4 below:

[0065]

[0066] For another example, when the ratio of the first LED light source: the second LED light source: the third LED light source is 2:1:1 (see Figure 4 ), the mixed light source data is shown in Table 5 below:

[0067]

[0068]

[0069] Furthermore, the S / P Ratio and M / P ratio values ​​of sunlight with the same color temperature of 2700K are compared as shown in Table 6 below:

[0070] project S / PRatio M / Pratio 2700K sunlight 1.34 0.509

[0071] From the above data, it can be seen that the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention has at least the following beneficial effects:

[0072] 1. The SSI (350-830nm) spectrum similarity of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention to the same color temperature of 2700K is greater than 90%;

[0073] 2. The 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention has a combined light Ra>95 and R1-R15>90;

[0074] 3. The TLCI-2012 TV Lighting Index of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention is >98;

[0075] 4. The GAI-BB relative blackbody trajectory color gamut index of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention is greater than 92;

[0076] 5. The TM-30-15 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention has Rg>95, Rf>97, and Rf,skin>95;

[0077] 6. The S / P Ratio and M / P ratio of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention are basically the same as those of sunlight with the same color temperature, providing a healthier rhythm and a clearer field of vision.

[0078] 7. Blue light hazard efficiency K of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention B，V Lower than the same color temperature of 2700K, low blue light hazard, meets the IEC-62471RGO exemption requirements, and is healthier for eyes.

[0079] Where CCx is the 1931 chromaticity coordinate x, CCy is the 1931 chromaticity coordinate y, CCT is the correlated color temperature, Duv is the distance from the blackbody with the same color temperature, Φ is the luminous flux, Φe is the optical power, LER is the effective luminous flux efficiency, TLCI-2012 is the television lighting index, Ra is the color rendering index, R1 is the light gray-red color rendering index, R2 is the dark gray-yellow color rendering index, R3 is the saturated yellow-green color rendering index, R4 is the medium yellow-green color rendering index, R5 is the light blue-green color rendering index, R6 is the light blue color rendering index, R7 is the light purple-blue color rendering index, and R8 is the light red-purple color rendering index. , R9 is the saturated red color rendering index, R10 is the saturated yellow color rendering index, R11 is the saturated green color rendering index, R12 is the saturated blue color rendering index, R13 is the Caucasian skin color rendering index, R14 is the leaf green color rendering index, R15 is the yellow skin color rendering index, GAI-BB is the color gamut area index of the relative isochromatic black body, GAI-E is the color gamut area index of the relative isoenergetic white light point, GACRI is the color gamut area of ​​the standard color corresponding to R1-R15, SSI is the spectral similarity, Rg is the saturation, Rf is the color fidelity, and Rf,skin is the fidelity of the skin color.

[0080] Furthermore, the combined light spectrum stability data of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention from low current to high current can also be seen. Figure 16 , the test report of spectrum stability and non-deformation is shown in Table 7 below:

[0081] No. Current ccx ccy CCT Duv Ra R9 R12 1 10mA 0.4600 0.4110 2701 0.0001 95.5 98.4 85.7 2 20mA 0.4597 0.4117 2710 0.0004 96.0 98.9 87.6 3 30mA 0.4598 0.4122 2714 0.0006 96.5 98.3 89.1 4 40mA 0.4597 0.4126 2717 0.0007 96.8 97.5 90.1 5 50mA 0.4597 0.4130 2720 0.0009 97.1 96.4 91.0 6 60mA 0.4592 0.4134 2729 0.0011 97.3 95.7 92.0 7 70mA 0.4595 0.4138 2728 0.0012 97.5 94.9 92.6 8 80mA 0.4591 0.4139 2735 0.0013 97.7 93.9 93.4 9 90mA 0.4594 0.4143 2734 0.0014 97.8 93.5 93.7 10 100mA 0.4590 0.4145 2741 0.0015 98.0 92.6 94.3 11 110mA 0.4588 0.4146 2744 0.0016 98.1 92.0 94.7 12 120mA 0.4591 0.4148 2742 0.0016 98.2 91.7 94.9

[0082] As shown in Table 7, the color quality parameters of the 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention are stable from low to high current, that is, the spectrum is stable.

[0083] The luminous efficiency of the LED chip with 3V stepless dimming infrared warm white LED structure provided by the embodiment of the present invention and the prior art solution is shown in Table 8 below:

[0084]

[0085] As can be seen from Table 7 above, the average luminous efficacy of the first, second, and third LED chips in the embodiment of the present invention is 91.69 lumens per watt (Lm / W), while the luminous efficacy of the 3V LED light source in the prior art is 59.64 Lm / W. Clearly, the LED structure in the embodiment of the present invention has a luminous efficacy 53.74% higher than that of the 3V LED light source in the prior art.

[0086] In the first fluorescent glue of this embodiment, the mass ratio of glue: green powder with an emission peak wavelength of 520-540nm: red powder with an emission peak wavelength of 650-670nm: red powder with an emission peak wavelength of 630-640nm: infrared phosphor with an emission peak wavelength of 700-770nm = 11: (9.5-10.5): (0.35-0.5): (0.5-0.7): (2.5-3.5). For example, the mass ratio of glue: green powder with an emission peak wavelength of 520-540nm: red powder with an emission peak wavelength of 650-670nm: red powder with an emission peak wavelength of 630-640nm: infrared phosphor with an emission peak wavelength of 700-770nm can be 11:9.5:0.35:0.5):2.5 or 11:10.5:0.5:0.7:3.5 or 11:10:0.42:0.6:3.

[0087] Furthermore, the composition of the green powder with an emission peak wavelength of 520-540 nm is Lu3Al5O 12 :Ce 3+, half-wave width is 80-120nm, and the half-wave width can be 80nm, 90nm, 100nm, 110nm or 120nm. The red powder with an emission peak wavelength of 650-670nm is composed of CaAlSiN3:Eu, and the half-wave width is 80-120nm. The half-wave width can be 80nm, 90nm, 100nm, 110nm or 120nm. The red powder with an emission peak wavelength of 630-640nm is composed of CaAlSiN3:Eu, and the half-wave width is 40-80nm. The half-wave width can be 40nm, 50nm, 60nm, 70nm or 80nm. The infrared phosphor with an emission wavelength of 700-770nm is composed of Ga4GeO8:Cr 3+ , the half-wave width is 120-180nm, and the half-wave width can be 120nm, 130nm, 140nm, 150nm, 160nm, 170nm or 180nm.

[0088] See Figure 5 It can be seen that the spectrum of the first LED light source of the LED structure of the embodiment of the present invention is as follows. The test data of the first LED light source is shown in Table 9 below:

[0089]

[0090] Among them combined Figure 6 It can be seen that the display index Ra of a single first LED light source is relatively low.

[0091] See further Figure 7 It can be seen that the blue light hazard efficiency K of a single first LED light source is B，V Higher.

[0092] In the second fluorescent glue of this embodiment, the mass ratio of glue: green powder with an emission peak wavelength of 520-540nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm is 11: (9.5-10.5): (0.35-0.5): (0.45-0.7): (4.8-5.8). For example, the mass ratio of glue: green powder with an emission peak wavelength of 520-540nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm can be 11:9.5:0.35:0.4:4.8 or 11:10.5:0.5:0.7:5.8 or 11:10:0.4:0.6:5.

[0093] Furthermore, the composition of the green powder with an emission peak wavelength of 520-540 nm is Lu3Al5O 12 :Ce3+ , half-wave width is 80-120nm, and the half-wave width can be 80nm, 90nm, 100nm, 110nm or 120nm. The red powder with an emission peak wavelength of 650-670nm is composed of CaAlSiN3:Eu, and the half-wave width is 80-120nm. The half-wave width can be 80nm, 90nm, 100nm, 110nm or 120nm. The red powder with an emission peak wavelength of 630-640nm is composed of CaAlSiN3:Eu, and the half-wave width is 40-80nm. The half-wave width can be 40nm, 50nm, 60nm, 70nm or 80nm. The infrared phosphor with an emission wavelength of 700-770nm is composed of Ga4GeO8:Cr 3+ , the half-wave width is 120-180nm, and the half-wave width can be 120nm, 130nm, 140nm, 150nm, 160nm, 170nm or 180nm.

[0094] See Figure 8 It can be seen that the spectrum of the second LED light source of the LED structure of the embodiment of the present invention is as follows. The test data of the second LED light source is shown in Table 10 below:

[0095]

[0096] Among them combined Figure 9 It can be seen that the display index Ra of a single second LED light source can reach a higher value. Figure 10 It can be seen that the blue light hazard efficiency K of a single second LED light source is B，V Still high.

[0097] In the third fluorescent glue of this embodiment, the mass ratio of glue: green powder with an emission peak wavelength of 530-545nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm is 11: (10.8-12.2): (0.35-0.5): (0.4-0.6): (3.1-4.1). For example, the mass ratio of glue: green powder with an emission peak wavelength of 530-545nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm can be 11:10.8:0.35:0.4:3.1 or 11:12.2:0.5:0.6:4.1 or 11:11.5:0.4:0.5:3.6.

[0098] Furthermore, the composition of the green powder with an emission peak wavelength of 530-545 nm is Lu3Al5O 12 :Ce3+ Green powder, half-wave width is 80-120nm, and half-wave width can be 120nm, 130nm, 140nm, 150nm, 160nm, 170nm or 180nm. Red powder with a peak emission wavelength of 650-670nm is composed of CaAlSiN3:Eu, with a half-wave width of 80-120nm, and half-wave width can be 120nm, 130nm, 140nm, 150nm, 160nm, 170nm or 180nm. Red powder with a peak emission wavelength of 630-640nm is composed of CaAlSiN3:Eu, with a half-wave width of 40-80nm, and half-wave width can be 40nm, 50nm, 60nm, 70nm or 80nm. Infrared phosphor with an emission wavelength of 700-770nm is composed of Ga4GeO8:Cr 3+ , the half-wave width is 120-180nm, and the half-wave width can be 120nm, 130nm, 140nm, 150nm, 160nm, 170nm or 180nm.

[0099] See Figure 11 It can be seen that the spectrum of the third LED light source of the LED structure of the embodiment of the present invention is as follows. The test data of the third LED light source is shown in Table 11 below:

[0100]

[0101]

[0102] Among them combined Figure 12 It can be seen that the display index Ra of the single third LED light source is relatively low.

[0103] See further Figure 13 It can be seen that the blue light hazard efficiency K of a single third LED light source is B，V Higher.

[0104] Further, see Figure 17 As can be seen from Table 12 below, the chromaticity coordinates of the LED structure of the embodiment of the present invention fall within a chromaticity ellipse centered at (0.4578, 0.4101) with a major axis a=0.00774, a minor axis of 0.00411, and an inclination angle of 57.17°, reflecting the light color concentration and color consistency of the product.

[0105]

[0106] In summary, the first LED light source, the second LED light source and the third LED light source arranged in combination in the embodiment of the present invention can achieve a higher color rendering index and lower blue light hazard. More importantly, Figure 16It can be seen that its combined light spectrum from low current to high current is very stable, which is very similar to the LED light source of the existing technology (see Figure 2 ) forms an obvious difference in the stability of the combined light spectrum from low current to high current.

[0107] 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 scope of protection of the present invention.

Claims

1. A 3V stepless dimming infrared warm white LED structure, characterized in that: comprising a first LED light source, a second LED light source and a third LED light source connected in series, in parallel or in series and parallel; The first LED light source includes a first LED chip and a first fluorescent glue encapsulating the first LED chip, the main wavelength of the first LED chip is 440-445nm, and the first fluorescent glue includes glue, green powder with an emission peak wavelength of 520-540nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm. The second LED light source includes a second LED chip and a second fluorescent glue encapsulating the second LED chip, the main wavelength of the second LED chip is 450-455nm, and the second fluorescent glue includes glue, green powder with an emission peak wavelength of 520-540nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm. The third LED light source includes a third LED chip and a third fluorescent glue encapsulating the third LED chip, the main wavelength of the third LED chip is 460-470nm, and the third fluorescent glue includes glue, green powder with an emission peak wavelength of 530-545nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm. The ratio of the first LED light source: the second LED light source: the third LED light source is (1-2): (1-2): 1; In the first fluorescent glue, the mass ratio of glue: green powder with an emission peak wavelength of 520-540 nm: red powder with an emission peak wavelength of 650-670 nm: red powder with an emission peak wavelength of 630-640 nm: infrared phosphor with an emission peak wavelength of 700-770 nm is 11: (9.5-10.5): (0.35-0.5): (0.5-0.7): (2.5-3.5); In the second fluorescent glue, the mass ratio of glue: green phosphor with an emission peak wavelength of 520-540 nm, red phosphor with an emission peak wavelength of 650-670 nm, red phosphor with an emission peak wavelength of 630-640 nm, and infrared phosphor with an emission peak wavelength of 700-770 nm is 11: (9.5-10.5): (0.35-0.5): (0.45-0.7): (4.8-5.8); In the third fluorescent glue, the mass ratio of glue: green powder with an emission peak wavelength of 530-545nm, red powder with an emission peak wavelength of 650-670nm, red powder with an emission peak wavelength of 630-640nm, and infrared phosphor with an emission peak wavelength of 700-770nm is 11: (10.8-12.2): (0.35-0.5): (0.4-0.6): (3.1-4.1).

2. The 3V stepless dimming infrared warm white LED structure according to claim 1, characterized in that: The composition of green powder with emission peak wavelength of 520-540nm is Lu3Al5O 12 :Ce 3+ , half-wave width is 80-120nm; the red powder with an emission peak wavelength of 650-670nm is composed of CaAlSiN3:Eu, and the half-wave width is 80-120nm; the red powder with an emission peak wavelength of 630-640nm is composed of CaAlSiN3:Eu, and the half-wave width is 40-80nm; the infrared phosphor with an emission wavelength of 700-770nm is composed of Ga4GeO8:Cr 3+ , half-wave width is 120-180nm.

3. The 3V stepless dimming infrared warm white LED structure according to claim 1, characterized in that: The composition of green powder with emission peak wavelength of 520-540nm is Lu3Al5O 12 :Ce 3+ , half-wave width is 80-120nm; the red powder with an emission peak wavelength of 650-670nm is composed of CaAlSiN3:Eu, and the half-wave width is 80-120nm; the red powder with an emission peak wavelength of 630-640nm is composed of CaAlSiN3:Eu, and the half-wave width is 40-80nm; the infrared phosphor with an emission wavelength of 700-770nm is composed of Ga4GeO8:Cr 3+ , half-wave width is 120-180nm.

4. The 3V stepless dimming infrared warm white LED structure according to claim 1, characterized in that: The composition of green powder with emission peak wavelength of 530-545nm is Lu3Al5O 12 :Ce 3+ Green powder, half-wave width is 80-120nm; red powder with emission peak wavelength of 650-670nm is composed of CaAlSiN3:Eu, half-wave width is 80-120nm; red powder with emission peak wavelength of 630-640nm is composed of CaAlSiN3:Eu, half-wave width is 40-80nm; infrared phosphor with emission wavelength of 700-770nm is composed of Ga4GeO8:Cr 3+ , half-wave width is 120-180nm.

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