Rhythm-adjustable LED light source for elderly lighting and preparation method thereof

Abstract

The present invention relates to the field of LED technology, and in particular to a rhythmically adjustable LED light source for elderly lighting and a preparation method thereof, comprising a bracket and a plurality of LED chips, a bowl cup being provided on the bracket, a region on the bracket located in the bowl cup being divided into a warm white light functional region and a positive white light functional region, each LED chip being distributed in the warm white light functional region and the positive white light functional region, each LED chip located in the warm white light functional region being provided with a first fluorescent glue layer, and the bowl cup being filled with a second fluorescent glue layer covering each LED chip in the first fluorescent glue layer and the positive white light functional region, and the ratio of fluorescent powder to glue in the first fluorescent glue layer being greater than the ratio of fluorescent powder to glue in the second fluorescent glue layer. The LED light source of the present invention has adjustable color temperature, controllable rhythm factor, and a single light source can achieve a single cup dual-color effect, while having the characteristic of good uniformity of light; at the same time, the M / P ratio and S / P ratio of the mixed light full color temperature section are substantially the same as those of sunlight with the same color temperature, which is beneficial for rest and work of the elderly.

Description

Technical Field

[0001] The present invention relates to the field of LED technology, and in particular to a rhythmically adjustable LED light source for elderly lighting and a preparation method thereof. Background Art

[0002] As we all know, most countries and regions in the world are rapidly entering an aging society. The problems faced by the elderly, such as declining physical functions, impaired perception, especially decreased visual ability, and more prone to circadian rhythm disorders, must be taken into account in elderly-friendly lighting.

[0003] From a visual point of view, the decline in visual function of the elderly is mainly due to changes in the physiological structure of the eyes, with notable features such as pupil constriction, a sharp decrease in the amount of light entering the retina, yellowing and hardening of the lens, reduced transparency, and increased flashes in the eyes.

[0004] Another is reduced sensitivity. The most common reason is insufficient eye adjustment, such as presbyopia, and dark adaptation. Young people go from a brighter environment to a darker environment and have a dark light adaptation process, while the elderly will be slower. These are all things that should be considered in elderly-friendly lighting.

[0005] First, as they age, the pupils of the elderly gradually shrink. Under the conditions of natural daylight adaptation, the pupil diameter of a 70-year-old is about half that of a 20-year-old. In other words, its area is only 25%. Young people think it is a normal light environment, but the elderly only receive 25% of the light, so they will feel that the light is dim.

[0006] Second, as people age, their lenses turn yellow. For example, compared with young people, the transmittance of red and blue light bands of 80, 65 and 50-year-olds is basically the same, but the transmittance of short-wave blue light bands drops sharply. For the elderly, it is equivalent to wearing a yellow filter to observe the world. Another problem is that the amount of light entering is further reduced, especially the blue light part.

[0007] Third, as people age, light scattering in the eye increases significantly, making them particularly sensitive to glare. For example, the elderly tend to find light dazzling.

[0008] In addition to the visual issues mentioned above, problems with circadian rhythm are also important to consider.

[0009] For example, the human body has a 24-hour cycle from day to night, regulating some important body functions, including metabolism, sleep and wakefulness, heart rate, blood pressure, etc. This is a very important physiological mechanism. Physiological mechanisms are closely related to health.

[0010] The light environment has a great impact on the human body's circadian rhythm. Generally, people receive strong light stimulation, natural sunlight, and avoid light stimulation at night, so that they can obtain a healthy circadian rhythm. For young people, it is easier to achieve a healthy light environment. However, for the elderly, especially the older ones, they may stay in a space for a long time during the day, and the amount of light they receive is drastically reduced, especially the blue light related to the rhythm, which makes the problem of rhythm health of the elderly more serious.

[0011] Furthermore, people of different ages have different circadian rhythm patterns. People of different ages go to bed at night and get up in the morning at different times. Disorders begin to occur when we are older. There are many reasons for this. On the one hand, the overall body function declines, the amount of light intake decreases, which has a significant impact on the rhythm. The reduction of blue light and the loss of the social clock of the elderly lead to more serious rhythm health problems. Summary of the invention

[0012] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a rhythm-adjustable LED light source for elderly lighting and a preparation method thereof.

[0013] In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a rhythm-adjustable LED light source for elderly lighting, comprising a bracket and a plurality of LED chips, wherein a bowl cup is arranged on the bracket, and the area on the bracket located within the bowl cup is divided into a warm white light functional area and a positive white light functional area, wherein the LED chips are distributed in the warm white light functional area and the positive white light functional area, and a first fluorescent glue layer is arranged on each of the LED chips located in the warm white light functional area, and the bowl cup is filled with a second fluorescent glue layer covering the first fluorescent glue layer and each of the LED chips in the positive white light functional area, and the ratio of fluorescent powder to glue in the first fluorescent glue layer is greater than the ratio of fluorescent powder to glue in the second fluorescent glue layer.

[0014] Optionally, a first fluorescent glue solution is prepared, and the first fluorescent glue solution is sprayed on the surface of each LED in the warm white light functional area to form the first fluorescent glue layer;

[0015] The first fluorescent glue solution is a mixture of a diluent and glue, green powder with an emission wavelength of 535-545 nm, red powder with an emission wavelength of 630-640 nm, and red powder with an emission wavelength of 650-660 nm.

[0016] Furthermore, the mass ratio of the diluent: the glue: the green powder with an emission wavelength of 535-545 nm: the red powder with an emission wavelength of 630-640 nm: the red powder with an emission wavelength of 650-660 nm is 15:3: (2.0-2.5): (0.2-0.3): (0.1-0.15).

[0017] Optionally, a second fluorescent glue solution is prepared, and the second fluorescent glue solution is filled into the bowl to form the second fluorescent glue layer;

[0018] The second fluorescent glue solution is a mixture of glue, green powder with an emission wavelength of 535-545nm, red powder with an emission wavelength of 630-640nm, fluoride red powder with an emission wavelength of 625-635nm, and infrared fluorescent powder with an emission wavelength of 725-735nm.

[0019] Furthermore, the mass ratio of the glue: the green powder with an emission wavelength of 535-545 nm: the red powder with an emission wavelength of 630-640 nm: the fluoride red powder with an emission wavelength of 625-635 nm: the infrared fluorescent powder with an emission wavelength of 725-735 nm is 3: (0.5-0.7): (0.01-0.02): (0.25-0.5): (0.2-0.3).

[0020] Furthermore, the plurality of LED chips include a first LED chip with a main wavelength of 440-445nm, a second LED chip with a main wavelength of 450-455nm, a third LED chip with a main wavelength of 465-470nm, a fourth LED chip with a peak wavelength of 407-413nm and a fifth LED chip with a peak wavelength of 475-485nm. The warm white light functional area is provided with the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip, and the positive white light functional area is provided with the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip.

[0021] Furthermore, the bare crystal peak spectral energy ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip is Фe (407-413nm): Фe (440-445nm): Фe (450-455nm): Фe (465-470nm): Фe (475-485nm) = (0.2-0.3): (0.8-1.0): (0.8-1.0): (0.6-0.9): (0.1-0.3).

[0022] Furthermore, the chip area ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip is (0.8-1.0): (0.8-1.0): (0.8-1.0): (0.8-1.0): (0.8-1.0).

[0023] Furthermore, the warm white light functional area is provided with a quantity ratio of the first LED chip: the second LED chip: the third LED chip: the fourth LED chip: the fifth LED chip of 3:3:3:1:1;

[0024] The quantity ratio of the first LED chip: the second LED chip: the third LED chip: the fourth LED chip: the fifth LED chip arranged in the positive white light functional area is 3:3:3:1:1.

[0025] The present invention also provides a method for preparing a rhythmically adjustable LED light source suitable for elderly lighting, which comprises the following steps:

[0026] S100: multiple LED chips are placed in the bowl on the bracket according to the drawing requirements, and are fixed on the bracket by a die bonding machine through insulating glue or silver glue. After the die bonding is completed, they are baked in an oven at 150-160° C. for 2h±10min to completely fix each LED chip on the bracket;

[0027] S200: connecting each LED chip to the positive and negative electrodes of the bracket by gold wire bonding using a gold wire bonding machine;

[0028] S300: prepare fluorescent powder and glue to form a first fluorescent glue solution, pour the first fluorescent glue solution into the glue barrel of the powder sprayer, and after the glue and bubbles are removed, spray the first fluorescent glue solution on each LED chip in the warm white light functional area according to the color parameter requirements. After spraying, bake at 160℃ / 0.5H;

[0029] S400: prepare a second fluorescent glue solution by mixing fluorescent powder and glue, pour the second fluorescent glue solution into the glue barrel of the glue dispensing machine, and after the glue and bubbles are discharged, dispense the second fluorescent glue solution into the bowl according to the color parameter requirements. After the dispensing is completed, bake at 80℃ / 0.5H+160℃ / 4H;

[0030] S500: After baking, threshing is performed and the spectrometer is used to separate the light according to the given color parameters to form a rhythmically adjustable LED light source suitable for elderly lighting.

[0031] Compared with the prior art, the rhythmically adjustable LED light source for elderly lighting of the present invention realizes adjustable color temperature of the light source and controllable rhythmic factor by setting a warm white light functional area and a pure white light functional area, and by designing a first fluorescent glue layer and a second fluorescent glue layer of different concentrations. Moreover, a single light source can achieve a single cup dual-color effect, and the good uniformity of the light is conducive to relaxing the eyes' visual angle, creating a comfortable and healthy light environment, and helping the elderly to see objects clearly. The M / P ratio and S / P ratio are basically the same as those of sunlight with the same color temperature, which is conducive to rest and work for the elderly. The blue ratio is lower than that of sunlight to prevent blue light hazards. The landing point is controlled within the range of 2800-5300K, between the Duv=-0.003 curve and the Duv=0.006 curve. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the layout structure of the LED chip in the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention.

[0033] Figure 2 It is a front view of the rhythm-adjustable LED light source for elderly lighting provided by the present invention.

[0034] Figure 3 It is a back view of the rhythm-adjustable LED light source for elderly lighting provided by the present invention.

[0035] Figure 4 It is a transverse cross-sectional view of the rhythm-adjustable LED light source for elderly lighting provided by the present invention.

[0036] Figure 5 It is a longitudinal cross-sectional view of the rhythm-adjustable LED light source for elderly lighting provided by the present invention.

[0037] Figure 6 This is a layout diagram of the first fluorescent glue layer and the second fluorescent glue layer of the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention.

[0038] Figure 7 It is a schematic diagram of the structure of an isolation plate used in the preparation process of the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention.

[0039] Figure 8 It is a bare crystal spectrum diagram of the LED chip of the rhythmically adjustable elderly-friendly lighting LED light source provided by the present invention.

[0040] Fig. 9 It is a spectrum diagram of the light quality of the warm white light functional area in the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention.

[0041] Fig.10 The blue light hazard efficiency K of the light quality of the warm white light functional area in the rhythmically adjustable elderly-friendly lighting LED light source provided by the present invention isB，V .

[0042] Fig.11 This is a comparison chart of the similarity between the light quality of the warm white light functional area in the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention and the 3000K sunlight spectrum.

[0043] Fig.12 This is a result diagram of the television lighting index TLCI-2012 of the light quality of the warm white light functional area in the rhythmically adjustable elderly-friendly lighting LED light source provided by the present invention.

[0044] Fig.13 This is a test report diagram of the light quality of the warm white light functional area in the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention.

[0045] Fig.14 It is a spectrum diagram of the light quality of the positive white light functional area in the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention.

[0046] Fig.15 The blue light hazard efficiency K of the light quality of the positive white light functional area in the rhythmically adjustable elderly-friendly lighting LED light source provided by the present invention is B，V .

[0047] Fig.16 This is a comparison chart of the similarity between the light quality of the positive white light functional area in the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention and the 3000K sunlight spectrum.

[0048] Fig.17 This is a result diagram of the television lighting index TLCI-2012 of the light quality of the positive white light functional area in the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention.

[0049] Fig.18 This is a test report diagram of the light quality of the positive white light functional area in the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention.

[0050] Fig.19 The present invention provides a chromaticity and BIN drop point diagram of the rhythmically adjustable elderly-friendly lighting LED light source.

[0051] Fig. 20 It is a full color temperature spectrum diagram of the rhythm-adjustable elderly-friendly lighting LED light source provided by the present invention.

[0052] Reference numerals:

[0053] 1- Warm white light negative electrode functional area 2- Positive white light negative electrode functional area 3- Positive white light positive electrode functional area

[0054] 4- Warm white light positive electrode functional area 5- Welding wire intersection 6- Second fluorescent glue layer

[0055] 7- Bracket 8- Bracket marking point 9- Bracket functional area

[0056] 10-bowl cup 11-warm white light negative electrode pad 12-positive white light negative electrode pad

[0057] 13- Warm white light positive electrode pad 14- Normal white light positive electrode pad 15- Bottom functional area heat dissipation pad

[0058] 16-Isolation belt 17-Copper material functional area 18-First fluorescent glue layer

[0059] 19-LED chip 20-isolation board 21-opening position

[0060] 191-first LED chip 192-second LED chip 193-third LED chip

[0061] 194 - fourth LED chip 195 - fifth LED chip. DETAILED DESCRIPTION

[0062] The following is combined with Figures 1 to 20 The technical solution of the present invention is further described in detail. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Although this specification is described according to the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The various embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0063] 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:

[0064]

[0065] 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.

[0066] See Figure 1As shown, the embodiment of the present invention provides a rhythmically adjustable LED light source for elderly lighting, including a bracket 7 and a plurality of LED chips, the bracket 7 is provided with a bowl 10, the bracket 7 is provided with a bracket functional area 9 in the area inside the bowl 10, the bracket functional area 9 is divided into a warm white light functional area and a positive white light functional area, the warm white light functional area includes a warm white light negative electrode functional area 1 and a warm white light positive electrode functional area 4, and the positive white light functional area includes a positive white light negative electrode functional area 2 and a positive white light positive electrode functional area 3. The bracket 7 is also provided with a bracket marking point 8, the function of which is to facilitate feeding identification and operation identification.

[0067] Combination Figure 6 As shown, each LED chip 19 is distributed in the warm white light functional area and the positive white light functional area. The LED chips in the warm white light functional area adopt J-line arc welding wire, and the LED chips in the positive white light functional area adopt trapezoidal line arc. Figure 1 As shown, there is a wire intersection 5 between the LED chips in the warm white light functional area and the LED chips in the positive white light functional area to prevent short circuit caused by wire intersection. The wires in this embodiment use J-wire arc wires, which can improve the product's resistance to cold and hot shocks, thereby improving the reliability of the product; secondly, except for the five intersecting wire arcs, the warm white light arc uses a J-wire arc, the positive white light uses a trapezoidal wire arc, and the rest use J-wire arc wires.

[0068] Recombination Figure 6 As shown, a first fluorescent glue layer 18 is provided on each of the LED chips 19 in the warm white light functional area, and the bowl cup 10 is filled with a second fluorescent glue layer 6 covering the first fluorescent glue layer 18 and each of the LED chips 19 in the positive white light functional area, and the ratio of fluorescent powder to glue in the first fluorescent glue layer 18 is greater than the ratio of fluorescent powder to glue in the second fluorescent glue layer 6.

[0069] The rhythmically adjustable LED light source for elderly lighting of the embodiment of the present invention realizes adjustable color temperature of the light source and controllable rhythm factor by setting a warm white light functional area and a pure white light functional area, and by designing a first fluorescent glue layer and a second fluorescent glue layer of different concentrations. Moreover, a single light source can achieve a dual-color effect in a single cup, and the good uniformity of the light is conducive to relaxing the eyes' viewing angle, creating a comfortable and healthy light environment, and helping the elderly to see objects clearly. The M / P ratio and S / P ratio are basically the same as those of sunlight with the same color temperature, which is conducive to rest and work for the elderly. The blue ratio is lower than that of sunlight to prevent blue light hazards. The landing point is controlled within the range of 2800-5300K, between the Duv=-0.003 curve and the Duv=0.006 curve.

[0070] In this embodiment, Figures 4-5As shown, the bracket 7 includes a copper material functional area 17. The copper material functional area 17 adopts a copper-nickel-on-silver process to improve the luminous flux of the product and the solderability of the product, thereby improving the reliability function of the product. Furthermore, an isolation belt 16 is provided on the copper material functional area 17. The isolation belt 16 is also called a white track, which plays the role of insulation and separation of positive and negative poles. The T-shaped waterproof groove design is adopted to play the role of waterproofing and increasing the air tightness of the product.

[0071] More specifically, if Figures 2-3 As shown, the bottom surface of the bracket 7 is provided with a warm white light negative electrode pad 11, a positive white light negative electrode pad 12, a warm white light positive electrode pad 13, a positive white light positive electrode pad 14 and a bottom functional area heat dissipation pad 15, which respectively correspond to the positions of the warm white light negative electrode functional area 1, the positive white light negative electrode functional area 2, the warm white light positive electrode functional area 4, the positive white light positive electrode functional area 3 and the bracket functional area 9.

[0072] Furthermore, a first fluorescent glue solution of a certain concentration is prepared, and the first fluorescent glue solution is sprayed on the surface of each LED in the warm white light functional area to form the first fluorescent glue layer 18; the first fluorescent glue solution is a mixture of diluent and glue, green powder with an emission wavelength of 535-545nm, red powder with an emission wavelength of 630-640nm, and red powder with an emission wavelength of 650-660nm.

[0073] Furthermore, the mass ratio of the diluent: the glue: the green powder with an emission wavelength of 535-545 nm: the red powder with an emission wavelength of 630-640 nm: the red powder with an emission wavelength of 650-660 nm=15:3:(2.0-2.5):(0.2-0.3):(0.1-0.15). Specifically, the mass ratio of the diluent: the glue: the green powder with an emission wavelength of 535-545 nm: the red powder with an emission wavelength of 630-640 nm: the red powder with an emission wavelength of 650-660 nm can be 15:3:2.0:0.2:0.1 or 15:3:2.5:0.3:0.15 or 15:3:2.3:0.25:0.13.

[0074] Furthermore, a second fluorescent glue solution of another concentration is prepared, and the second fluorescent glue solution is filled in the bowl cup 10 to form the second fluorescent glue layer 6; the second fluorescent glue solution is a mixture of glue and green powder with an emission wavelength of 535-545nm, red powder with an emission wavelength of 630-640nm, fluoride red powder with an emission wavelength of 625-635nm, and infrared fluorescent powder with an emission wavelength of 725-735nm.

[0075] Furthermore, the mass ratio of the glue: the green powder with an emission wavelength of 535-545nm: the red powder with an emission wavelength of 630-640nm: the fluoride red powder with an emission wavelength of 625-635nm: the infrared fluorescent powder with an emission wavelength of 725-735nm is 3: (0.5-0.7): (0.01-0.02): (0.25-0.5): (0.2-0.3). Specifically, the mass ratio of the glue: the green powder with an emission wavelength of 535-545nm: the red powder with an emission wavelength of 630-640nm: the fluoride red powder with an emission wavelength of 625-635nm: the infrared fluorescent powder with an emission wavelength of 725-735nm can be 3:0.5:0.01:0.25:0.2 or 3:0.7:0.02:0.5:0.3 or 3:0.6:0.015:0.35:0.25.

[0076] Furthermore, the green powder with an emission wavelength of 535-545 nm is Lu 3 Al 5 O 12 :Ce 3+ Component, half-wave width is 95-105nm; the half-wave width can be 95nm, 100nnm or 105nm.

[0077] The red powder with an emission wavelength of 630-640nm is CaAlSiN 3 : Eu component, half-wave width is 60-80nm; the half-wave width can be 60nm, 70nm or 80nm.

[0078] The red powder with an emission wavelength of 650-660nm is CaAlSiN 3 : Eu component, half-wave width is 95-105nm; the half-wave width can be 95nm, 100nm or 105nm.

[0079] The fluoride red powder with an emission wavelength of 625-635 nm is K 2 SiF 6 :Mn 4+ There are several small peaks around 630nm.

[0080] The infrared phosphor with an emission wavelength of 725-735 nm is composed of Ga4GeO8:Cr3+, and has a half-wave width of 140-160 nm, which may be 140 nm, 150 nm or 160 nm.

[0081] The light color quality of the warm white light spectrum LED in this embodiment meets the relative spectrum height shown in Table 1 below.

[0082]

[0083] See further Fig.10 The blue light hazard efficiency K of the rhythm-adjustable LED light source for elderly lighting in this embodiment is B，V =0.000321276, which is the blue light hazard efficiency K of sunlight with the same color temperature B，V Low (K B，V / K B，V (3000K sunlight) = 90.13%), meets the blue light exemption RG0 standard, and the eye protection spectrum is healthier.

[0084] See Fig.11 The rhythm-adjustable elderly-friendly lighting LED light source in this embodiment has excellent spectral similarity parameters with 3000K sunlight spectrum, SSI (380-780nm)>91, SSI (430-690nm)>96, which restores the color of natural light, allowing people to experience nature and enjoy sunshine bathing.

[0085] Furthermore, the 3000K light color and electrical parameters of the rhythmically adjustable elderly-friendly lighting LED light source of this embodiment are as shown in Table 2:

[0086]

[0087]

[0088] It can be seen from Table 2 above that the light color parameters of the rhythmically adjustable LED light source for elderly lighting according to the embodiment of the present invention meet the following requirements:

[0089] 1.Ra>97, R1-15>90;

[0090] 2. CQS (color quality index)>97;

[0091] 3.TM-30-20, Rg>98, Rf>95, Rf, skin>95;

[0092] 4. TV lighting index TLCI-2012>99;

[0093] 5. Relative sunlight color gamut area index GAI-BB>100;

[0094] 6.LER (effective light efficiency) = Ф (luminous flux) / Ф e (Light power)>250Lm / W, 54.27% higher than sunlight with the same color temperature of 3000K (LER=164lm / w).

[0095] Furthermore, the important spectrum parameters of the rhythmically adjustable elderly-friendly lighting LED light source according to the embodiment of the present invention are shown in Table 3 below:

[0096]

[0097]

[0098] As can be seen from Table 3 above, the S / P ratio (dark-light visual brightness ratio) of the rhythmically adjustable elderly-friendly lighting LED light source of the embodiment of the present invention is basically the same as that of sunlight with the same color temperature of 3000K, which is conducive to relaxing the eyes, creating a comfortable and healthy light environment, and is conducive to the elderly seeing things clearly. The M / P ratio (non-bright visual brightness ratio) is basically the same as that of sunlight with the same color temperature of 3000K, which is conducive to the elderly resting. The blue ratio is lower than that of sunlight, preventing blue light hazards. From the perspective of crop utilization, it is conducive to the growth and development of plants, and is suitable for the elderly to grow flowers and plants and cultivate sentiments.

[0099] like Fig.12 It can be seen that the rhythm-adjustable LED light source for elderly lighting of the embodiment of the present invention has the following characteristics:

[0100] 1. The S / P ratio (dark-light visual brightness ratio) is the same as that of sunlight with the same color temperature of 3000K, which is conducive to relaxing the eyes, creating a comfortable and healthy light environment and allowing objects to be seen clearly and brightly;

[0101] 2. The M / P ratio (non-photopic brightness ratio) is the same as that of sunlight with the same color temperature of 3000K, which promotes the secretion of melatonin and is conducive to the rest of the elderly;

[0102] 3. SSI (380-780nm) spectrum similarity, 100% restoration of natural light color, healthier and more ecological;

[0103] 4. High TLCI-2012 parameters, light shines on books or fonts, the restoration is clearer, and the human body or equipment can be seen more clearly.

[0104] 5.MDER, melanopsin equivalent daylight efficiency is the same as sunlight with the same color temperature of 3000K, which is conducive to eye relaxation and clearer vision;

[0105] 6. High color quality and high brightness help the elderly see things clearly.

[0106] Further, see Fig.13 , test report of the rhythm-adjustable elderly-friendly LED light source 3000K according to an embodiment of the present invention.

[0107] The light color quality of the positive white light 5000K spectrum LED in this embodiment meets the relative spectrum height as shown in Table 4 below:

[0108]

[0109] Further, see Fig.15 The blue light hazard efficiency K of the rhythm-adjustable LED light source for elderly lighting in this embodiment isB，V =0.000687997, which is the blue light hazard efficiency K of sunlight with the same color temperature B，V Low (K B，V / K B，V (5000K sunlight) = 95.11%), meets the blue light exemption RG0 standard, and the eye protection spectrum is healthier.

[0110] See Fig.16 , with excellent spectral similarity parameters of SSI (380-780nm)>91 and SSI (430-690nm)>96 with 3000K sunlight spectrum, it restores the color of natural light, allowing people to experience nature and enjoy the sun bath.

[0111] Furthermore, the rhythm-adjustable elderly-friendly lighting LED light source of this embodiment has a spectral similarity with 5000K sunlight, SSI (380-780nm)>85, SSI (430-690nm)>92, and has excellent spectral similarity parameters, which restores the color of natural light, allowing people to experience nature and enjoy a sun bath.

[0112] The 5000K light color and electrical parameters of the rhythmically adjustable elderly-friendly LED light source of this embodiment are shown in Table 5 below:

[0113]

[0114]

[0115] It can be seen from Table 5 above that the light color parameters of the rhythmically adjustable LED light source for elderly lighting according to the embodiment of the present invention meet the following requirements:

[0116] 1.Ra>95, R1-15>90;

[0117] 2. CQS (color quality index)>95;

[0118] 3.TM-30-20, Rg>98, Rf>95, Rf, skin>95;

[0119] 4. TV lighting index TLCI-2012>99;

[0120] 5. Relative sunlight color gamut area index GAI-BB>98;

[0121] 6.LER (effective light efficiency) = Ф (luminous flux) / Ф e (Light power)>255Lm / W, 24.84% higher than sunlight with the same color temperature of 5000K (LER=207.38lm / w);

[0122] 7.COI (acid index) <3.3, meeting the standards of medical light sources.

[0123] Furthermore, the important spectrum parameters of the rhythmically adjustable LED light source for elderly lighting according to the embodiment of the present invention are shown in Table 6 below:

[0124]

[0125] As can be seen from Table 6 above, the rhythmically adjustable elderly-friendly lighting LED light source of the embodiment of the present invention has a higher S / P ratio (dark-light visual brightness ratio) than the sunlight with the same color temperature of 5000K, which is conducive to relaxing the eyes, creating a comfortable and healthy light environment, and is conducive to the elderly seeing things clearly. The M / P ratio (non-photopic visual brightness ratio) is higher than the sunlight with the same color temperature of 5000K, which is conducive to the elderly working, studying and reading. The red ratio is higher than that of sunlight, which is conducive to the consumption and release of energy ATP. From the perspective of crop utilization, it is conducive to the growth and development of plants, and is suitable for the elderly to grow flowers and plants and cultivate sentiments.

[0126] like Fig.17 It can be seen that the rhythm-adjustable LED light source for elderly lighting of the embodiment of the present invention has the following characteristics:

[0127] 1. The S / P ratio (dark-light visual brightness ratio) is higher than that of sunlight with the same color temperature of 5000K, which is conducive to relaxing the eyes' viewing angle, creating a comfortable and healthy light environment and allowing objects to be seen clearly and brightly;

[0128] 2. The M / P ratio (non-photopic brightness ratio) is higher than that of sunlight with the same color temperature of 5000K, which inhibits the secretion of melatonin, makes people more energetic, and is beneficial for the elderly to work, study and read;

[0129] 3. High SSI (380-780nm) spectrum similarity, 100% restoration of natural light color, healthier and more ecological;

[0130] 4. High TLCI-2012 parameters, light shines on books or fonts, the restoration is clearer, and the human body or equipment can be seen more clearly;

[0131] 5.MDER, melanopsin equivalent daylight efficiency is as high as sunlight with the same color temperature of 5000K, which is conducive to eye relaxation and clearer vision.

[0132] Further, see Fig.18 , test report of 5000K rhythm-adjustable elderly-friendly LED light source according to an embodiment of the present invention.

[0133] The single-cup dual-color dimming data of the rhythm-adjustable elderly-friendly LED light source according to the embodiment of the present invention are shown in Table 7 below:

[0134]

[0135] like Fig.19The chromaticity and BIN drop point diagram of the rhythm-adjustable elderly-friendly lighting LED light source provided by the embodiment of the present invention are shown, further combined with the following Table 8:

[0136]

[0137]

[0138] According to Table 8, we can know that:

[0139] 1. The color gamut area index of the full color temperature range relative to sunlight GAI-BB>100, which meets the requirements of lighting chromaticity index, and the light color quality is very positive;

[0140] 2. The color rendering index of the full color temperature range is Ra>95, the special color rendering index is R9>80, R12>90;

[0141] 3. TV lighting index in full color temperature range TLCI-2012>99;

[0142] 4. Color quality index CQS>95 in all color temperature ranges;

[0143] 5. Full color temperature range TM-30, Rg>98, Rf>95, Rf,skin>95.

[0144] Further combined with the following Table 9:

[0145]

[0146] It can be seen that the rhythm-adjustable LED light source for elderly lighting provided by the embodiment of the present invention has the following advantages:

[0147] 1. The S / P ratio of all color temperature ranges is higher than the parameters of sunlight with the same color temperature, which is conducive to relaxing the eyes, creating a comfortable and healthy light environment and allowing objects to be seen clearly and brightly;

[0148] 2. The M / P ratio of all color temperature ranges is higher than the parameters of sunlight with the same color temperature. The rhythm factor is adjustable. Low color temperature promotes the secretion of melatonin, which helps the elderly to rest. High color temperature inhibits the secretion of melatonin, which helps the elderly to carry out daily activities and read books and newspapers.

[0149] 3.3300-5000K, COI (acid index) <3.3, meeting the medical light source standards;

[0150] 4. The similarity between the full color temperature range and the sunlight spectrum SSI (380-780nm)>85, SSI (430-690nm)>92, 100% restoration of natural light color, healthier and more ecological, and beneficial to the vision protection of the elderly;

[0151] 5. In the full color temperature range, MDER, the melanopsin equivalent daylight efficiency is higher than that of sunlight with the same color temperature, which is conducive to eye relaxation and clearer vision.

[0152] The full color temperature spectrum of the rhythm-adjustable LED light source for elderly lighting according to the embodiment of the present invention is shown in FIG. Fig. 20 . Its full color temperature spectrum meets the following requirements: relative spectrum height 380-500nm<0.6, 700-780nm>0.2; peak wavelength is between 620-640nm and there are multiple peaks between 600-650nm. The adjustable color temperature is adjustable from 3000K-5000K, and the falling points are between the Duv=-0.003 curve and the Duv=+0.003 curve. The color is very positive, suitable for lighting sources, and more suitable for lighting for the elderly.

[0153] Further, see Figures 1-2 and 6, the plurality of LED chips include a first LED chip 191 with a main wavelength of 440-445nm, a second LED chip 192 with a main wavelength of 450-455nm, a third LED chip 193 with a main wavelength of 465-470nm, a fourth LED chip 194 with a peak wavelength of 407-413nm, and a fifth LED chip 195 with a peak wavelength of 475-485nm. The first LED chip 191, the second LED chip 192, the third LED chip 193, the fourth LED chip 194, and the fifth LED chip 195 are arranged in the warm white light functional area, and the first LED chip 191, the second LED chip 192, the third LED chip 193, the fourth LED chip 194, and the fifth LED chip 195 are arranged in the positive white light functional area. Specifically, see Figure 1 , wherein the green LED chip is the first LED chip 191 , the blue LED chip is the second LED chip 192 , the orange LED chip is the third LED chip 193 , the black LED chip is the fourth LED chip 194 , and the purple LED chip is the fifth LED chip 195 .

[0154] Further, see Figure 8, the bare crystal peak spectral energy ratio of the first LED chip 191, the second LED chip 192, the third LED chip 193, the fourth LED chip 194 and the fifth LED chip 195 is Фe (407-413nm): Фe (440-445nm): Фe (450-455nm): Фe (465-470nm): Фe (475-485nm) = (0.2-0.3): (0.8-1.0): (0.8-1.0): (0.6-0.9): (0.1-0.3). Among them, Фe (407-413nm): Фe (440-445nm): Фe (450-455nm): Фe (465-470nm): Фe (475-485nm) can be 0.2: 0.8: 0.8: 0.6: 0.1 or 0.3: 1.0: 1.0: 0.9: 0.3 or 0.25: 0.9: 0.9: 0.75: 0.2.

[0155] Further, the chip area ratio of the first LED chip 191, the second LED chip 192, the third LED chip 193, the fourth LED chip 194 and the fifth LED chip 195 is (0.8-1.0): (0.8-1.0): (0.8-1.0): (0.8-1.0). Specifically, the chip area ratio of the first LED chip 191, the second LED chip 192, the third LED chip 193, the fourth LED chip 194 and the fifth LED chip 195 can be 0.8: 0.9: 1.0: 0.8: 0.9 or 1.0: 0.8: 0.9: 1.0: 0.8 or 0.9: 1.0: 0.8: 0.9: 1.0.

[0156] Furthermore, the quantity ratio of the first LED chip 191 : the second LED chip 192 : the third LED chip 193 : the fourth LED chip 194 : the fifth LED chip 195 in the warm white light functional area is 3:3:3:1:1.

[0157] Furthermore, the quantity ratio of the first LED chip 191 : the second LED chip 192 : the third LED chip 193 : the fourth LED chip 194 : the fifth LED chip 195 arranged in the positive white light functional area is 3:3:3:1:1.

[0158] The embodiment of the present invention also provides a method for preparing a rhythm-adjustable LED light source for elderly lighting, which comprises the following steps:

[0159] S100: multiple LED chips are placed in the bowl 10 on the bracket 7 according to the drawing requirements, and are fixed on the bracket 7 by a die bonding machine through insulating glue or silver glue. After the die bonding is completed, they are baked in an oven at a temperature of 150-160° C. for 2h±10min, so that each LED chip is completely fixed on the bracket 7;

[0160] S200: connecting each LED chip to the positive and negative electrodes of the bracket 7 by gold wire bonding using a gold wire bonding machine;

[0161] S300: prepare fluorescent powder and glue to form a first fluorescent glue solution, pour the first fluorescent glue solution into the glue barrel of the powder sprayer, and after the glue and bubbles are removed, spray the first fluorescent glue solution on each LED chip in the warm white light functional area according to the color parameter requirements. After spraying, bake at 160℃ / 0.5H;

[0162] S400: preparing a second fluorescent glue solution by mixing fluorescent powder and glue, pouring the second fluorescent glue solution into the glue barrel of the glue dispensing machine, dispensing the second fluorescent glue solution into the bowl 10 according to the color parameter requirements after the glue dispensing is completed, and baking at 80°C / 0.5H+160°C / 4H;

[0163] S500: After baking, threshing is performed and the spectrometer is used to separate the light according to the given color parameters to form a rhythmically adjustable LED light source suitable for elderly lighting.

[0164] Further, in step S300, an isolation plate 20 (see Figure 7 ), the isolation plate 20 has opening positions 21 corresponding to the LED chips in the warm white light functional area, and the opening positions 21 are 3%-5% larger than the area of ​​the corresponding LED chips. The first fluorescent glue solution can be sprayed on the LED chips, and at the same time, the first fluorescent glue solution can be prevented from splashing to the LED chips in the positive white light functional area to prevent the risk of cross contamination.

[0165] 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 rhythm-adjustable LED light source for elderly lighting, characterized in that: It comprises a bracket and a plurality of LED chips, wherein a bowl cup is arranged on the bracket, and the area of ​​the bracket located in the bowl cup is divided into a warm white light functional area and a positive white light functional area, and each of the LED chips is distributed in the warm white light functional area and the positive white light functional area, and each of the LED chips located in the warm white light functional area is provided with a first fluorescent glue layer, and the bowl cup is filled with a second fluorescent glue layer covering the first fluorescent glue layer and each of the LED chips in the positive white light functional area, and the ratio of fluorescent powder to glue in the first fluorescent glue layer is greater than the ratio of fluorescent powder to glue in the second fluorescent glue layer; A first fluorescent glue solution is prepared, and the first fluorescent glue solution is sprayed on the surface of each LED in the warm white light functional area to form the first fluorescent glue layer; the first fluorescent glue solution is a mixture of a diluent and glue, a green powder with an emission wavelength of 535-545nm, a red powder with an emission wavelength of 630-640nm, and a red powder with an emission wavelength of 650-660nm; the mass ratio of the diluent: the glue: the green powder with an emission wavelength of 535-545nm: the red powder with an emission wavelength of 630-640nm: the red powder with an emission wavelength of 650-660nm=15:3:(2.0-2.5):(0.2-0.3):(0.1-0.15); A second fluorescent glue solution is prepared, and the second fluorescent glue solution is filled into the bowl to form the second fluorescent glue layer; the second fluorescent glue solution is a mixture of glue and green powder with an emission wavelength of 535-545nm, red powder with an emission wavelength of 630-640nm, fluoride red powder with an emission wavelength of 625-635nm, and infrared fluorescent powder with an emission wavelength of 725-735nm; the mass ratio of the glue: the green powder with an emission wavelength of 535-545nm: the red powder with an emission wavelength of 630-640nm: the fluoride red powder with an emission wavelength of 625-635nm: the infrared fluorescent powder with an emission wavelength of 725-735nm = 3: (0.5-0.7): (0.01-0.02)：(0.25-0.5)：(0.2-0.3)。 2. The rhythm-adjustable LED light source for elderly lighting according to claim 1, characterized in that: The multiple LED chips include a first LED chip with a main wavelength of 440-445nm, a second LED chip with a main wavelength of 450-455nm, a third LED chip with a main wavelength of 465-470nm, a fourth LED chip with a peak wavelength of 407-413nm and a fifth LED chip with a peak wavelength of 475-485nm. The warm white light functional area is provided with the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip, and the positive white light functional area is provided with the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip.

3. The rhythm-adjustable elderly-friendly LED light source according to claim 2, characterized in that: The bare crystal peak spectral energy ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip is Фe (407-413nm): Фe (440-445nm): Фe (450-455nm): Фe (465-470nm): Фe (475-485nm) = (0.2-0.3): (0.8-1.0): (0.8-1.0): (0.6-0.9): (0.1-0.3).

4. The rhythm-adjustable LED light source for elderly lighting according to claim 2, characterized in that: The chip area ratio of the first LED chip, the second LED chip, the third LED chip, the fourth LED chip and the fifth LED chip is (0.8-1.0): (0.8-1.0): (0.8-1.0): (0.8-1.0).

5. The rhythm-adjustable LED light source for elderly lighting according to claim 2, characterized in that: The warm white light functional area is provided with a quantity ratio of the first LED chip: the second LED chip: the third LED chip: the fourth LED chip: the fifth LED chip of 3:3:3:1:1; The quantity ratio of the first LED chip: the second LED chip: the third LED chip: the fourth LED chip: the fifth LED chip arranged in the positive white light functional area is 3:3:3:1:

1.

6. A method for preparing a rhythm-adjustable LED light source for elderly lighting according to any one of claims 1 to 5, characterized in that: The following steps are involved: S100: multiple LED chips are placed in the bowl on the bracket according to the drawing requirements, and are fixed on the bracket by a die bonding machine through insulating glue or silver glue. After the die bonding is completed, they are baked in an oven at 150-160° C. for 2h±10min to completely fix each LED chip on the bracket; S200: connecting each LED chip to the positive and negative electrodes of the bracket by gold wire bonding using a gold wire bonding machine; S300: prepare fluorescent powder and glue to form a first fluorescent glue solution, pour the first fluorescent glue solution into the glue barrel of the powder sprayer, and after the glue and bubbles are removed, spray the first fluorescent glue solution on each LED chip in the warm white light functional area according to the color parameter requirements. After spraying, bake at 160℃ / 0.5H; S400: prepare a second fluorescent glue solution by mixing fluorescent powder and glue, pour the second fluorescent glue solution into the glue barrel of the glue dispensing machine, and after the glue and bubbles are discharged, dispense the second fluorescent glue solution into the bowl according to the color parameter requirements. After the dispensing is completed, bake at 80℃ / 0.5H+160℃ / 4H; S500: After baking, threshing is performed and the spectrometer is used to separate the light according to the given color parameters to form a rhythmically adjustable LED light source suitable for elderly lighting.

Images