Old and film dual-purpose LED light source based on partition design

Abstract

The utility model belongs to LED technical field especially relates to a kind of old and dual-purpose LED light source of film based on zoning design, including 4PIN foot double-bowl cup type double-way support and multiple LED chip;The double-way support is provided with peripheral functional area and inner peripheral functional area, and the inner peripheral functional area is coated with the warm white fluorescent glue of each LED chip covered on it, and the double-way support is coated with the positive white light color fluorescent glue of each LED chip covered on the warm white fluorescent glue and peripheral functional area.The utility model has the effect including:1.full color gamut precision adjustment, adapt to various scenes;2.high color rendering, color restoration real;3.high spectral similarity, light color healthy natural;4.good light biological safety, good eye protection effect;5.high consistency and stability.

Description

Technical Field

[0001] This utility model belongs to the field of LED technology, and in particular relates to an LED light source based on a partitioned design suitable for both the elderly and film and television applications. Background Technology

[0002] With the accelerating aging of the population and the high-quality development of the film and television industry, the demand for lighting in special scenarios is becoming increasingly prominent. Existing dual-color temperature LED light sources have significant technical bottlenecks in the fields of health lighting for the elderly and professional film and television supplementary lighting, as follows: I. Technical pain points in the field of lighting for the elderly.

[0003] Insufficient visual physiological adaptation: Yellowing of the lens in the elderly leads to a 30-40% decrease in the transmittance of blue light in the 400-500nm range. Existing light sources generally suffer from spectral deficiencies in this wavelength range (with a trough depth exceeding 25%), further impairing the color perception abilities of the elderly, especially making it difficult to identify blue-violet objects. Clinical studies have shown that in elderly living environments using traditional LED lighting, the risk of falls increases by 27% compared to natural light environments, and the color misjudgment rate increases by 40%. The light source involved in this invention, through a specific chip ratio (comprising LED chips with a peak wavelength of 405-415nm, a main wavelength of 435-445nm, a main wavelength of 450-460nm, and a main wavelength of 462-470nm in a 1:1:1:1 ratio), can effectively compensate for the spectral deficiencies in the 400-500nm wavelength range, better meeting the visual needs of the elderly.

[0004] Photobiological safety hazards: Existing dual-color temperature light sources often use 450nm high-peak blue light chips to improve brightness. The risk of photochemical damage to retinal photoreceptor cells from blue light in this wavelength band is 3.2 times that of the 480nm band. Elderly individuals, due to declining pupillary accommodation ability (a 60% decrease in light sensitivity), have a 1.8 times increased probability of developing age-related macular degeneration (AMD) with long-term exposure to such light sources. The light source of this invention optimizes chip selection and ratio, reducing the proportion of harmful blue light. Simultaneously, its S / PRatio and M / Pratio are essentially consistent with sunlight of the same color temperature, thus reducing photobiological safety hazards.

[0005] Limitations of Color Temperature Adjustment: Elderly individuals are more sensitive to changes in color temperature in their circadian rhythms. However, existing light sources exhibit significant color shift (Duv > -0.008) during the 2700K-6500K adjustment process, increasing the probability of circadian rhythm disruption by 22%. Furthermore, traditional light sources generally have a color rendering index (R9, saturated red) below 80, failing to accurately reproduce key color information such as medicine packaging and food, impacting the daily safety of the elderly. In contrast, the light source of this invention can meet the full color gamut adjustment requirements from 2700-6500K, with Ra > 95 and R1-R15 > 90, accurately reproducing colors and reducing the impact of color shift.

[0006] II. Technical bottlenecks in the field of film and television lighting.

[0007] Insufficient Spectral Matching: Professional film and television shooting requires a light source with a spectral similarity (SSI) of ≥90 to sunlight. However, existing dual-color temperature fill lights exhibit significant deviations in the 480-520nm (cyan-green) and 600-620nm (orange-red) wavelengths, leading to distorted skin tone reproduction (especially for Asian skin tones with an R15 index below 85), increasing post-production color grading workload by more than 40%. This invention utilizes a light source with an SSI >90, highly matching the spectrum of sunlight at the same color temperature, reducing skin tone distortion and lowering post-production color grading workload.

[0008] Light color uniformity defects: Traditional surface light sources often have a color temperature deviation of more than 300K between the center and edge, resulting in a "half-and-half" effect in the captured image. When using multiple lights in combination, the color tolerance (SDCM) between different lights is greater than 5, causing damage to the color consistency of the image, and the pass rate of film and television-grade supplementary lighting equipment is less than 65%. The light source of this utility model has the characteristic of more uniform light color, which can avoid such problems and improve the supplementary lighting effect in film and television.

[0009] Dynamic adjustment response lag: Existing drive circuits have a response time >100ms during color temperature switching, which cannot meet the dynamic lighting requirements of high-speed photography (>120fps), resulting in noticeable color banding during rapid scene transitions. Simultaneously, the dimming depth can only reach 1%, failing to simulate weak lighting effects in night scene shooting. This invention's partitioned design and reasonable circuit structure are expected to improve the dynamic adjustment response speed, better meeting the dynamic lighting needs of film and television.

[0010] III. Limitations of existing technologies for improvement.

[0011] While the "An Aging-Friendly LED Lighting Device" with announcement number CN216747853U mentions a color temperature adjustment function, it does not optimize the spectral structure for the visual characteristics of the elderly. Its R1-R15 special color rendering indices are all below 85, and it does not involve photobiological safety design. The "Film-Grade Dual-Color Temperature LED Fill Light" with announcement number CN113872654A emphasizes high color rendering, but it uses a single functional area design, resulting in a light color uniformity deviation exceeding 200K, and a spectral similarity index (SSI) of only 82, which cannot meet the requirements of film-grade shooting.

[0012] Furthermore, existing technologies generally lack zoned optimization design, leading to overall scrap due to local chip defects during production, resulting in a yield rate of only 75-82%, which restricts cost control for high-end lighting products. This invention, however, employs a zoned design, achieving a higher yield rate and effectively solving this problem. Therefore, developing a dual-color temperature LED light source structure that combines visual adaptability for the elderly, film-grade spectral quality, and high production yield has become an urgent technical problem to be solved in this field. Utility Model Content

[0013] The purpose of this utility model is to provide an LED light source for both the elderly and film and television applications based on a zoned design, which has high color rendering, full color gamut, and dual color temperature performance, and can at least solve one of the aforementioned prior art problems.

[0014] To achieve the above objectives, the utility model provides an LED light source for both elderly and film / television applications based on a partitioned design, characterized in that it includes a 4-pin double-cup type dual-path bracket and multiple LED chips; The dual-path bracket is provided with an outer functional area and an inner functional area. The multiple LED chips include two violet LED chips with a peak wavelength of 405-415nm, two blue LED chips with a main wavelength of 435-445nm, two blue LED chips with a main wavelength of 450-460nm, and two blue LED chips with a main wavelength of 462-475nm, all disposed in the inner functional area. The peripheral functional area also includes two violet LED chips with a peak wavelength of 405-415nm, two blue LED chips with a main wavelength of 435-445nm, two blue LED chips with a main wavelength of 450-460nm, and two blue LED chips with a main wavelength of 462-475nm. The multiple LED chips located in the inner functional area are arranged in a 2-parallel 4-series circuit configuration, and the multiple LED chips located in the peripheral functional area are also arranged in a 2-parallel 4-series circuit configuration. The inner functional area is coated with warm white fluorescent adhesive covering each of the LED chips thereon, and the dual-path bracket is coated with pure white fluorescent adhesive covering the warm white fluorescent adhesive and each of the LED chips on the outer functional area.

[0015] Optionally, the dual-path bracket includes an outer cup, an inner cup located within the outer cup, and a bracket back plating layer, a bracket copper layer, and a functional area electroplating layer stacked from bottom to top below the outer cup. The inner cup surrounds the inner functional area, and the inner cup and the outer cup together surround the outer functional area. Each LED chip is disposed on the functional area electroplating layer.

[0016] Optionally, the back coating of the bracket is a three-layer structure comprising a copper plating layer, a nickel plating layer, and a silver plating layer stacked together.

[0017] Optionally, the thickness of the silver plating layer ranges from 2 to 3 μm.

[0018] Optionally, the copper layer of the bracket is made of C194 red copper with a thickness of 0.2-0.3 mm.

[0019] Optionally, the electroplating layer of the functional area is a three-layer structure comprising a stacked copper plating layer, a nickel plating layer, and a silver plating layer.

[0020] Optionally, the thickness of the silver plating layer ranges from 3 to 5 μm.

[0021] Optionally, the support cup is made of PCT or EMC material.

[0022] The above-mentioned technical solutions of the LED light source for both elderly and film / television applications based on partitioned design provided in this embodiment of the utility model have at least one of the following technical effects: 1. Full color gamut precise adjustment to adapt to various scenarios: By adjusting the input ratio of 2700K and 5700K, continuous and precise color temperature adjustment can be achieved across the entire color gamut from 2736K to 5776K, which can meet the lighting color temperature needs of different scenarios such as home, office, and commercial. For example, warm light creates a cozy atmosphere, while cool light provides a clear and bright working environment.

[0023] 2. High color rendering and true color reproduction: The color rendering index Ra is mostly above 96 in the full color gamut, and some are even close to 98. Special color rendering indices such as R9, R12, and R13 also perform well, accurately reproducing the true colors of objects. This is of great significance for both the display of artworks and the identification of colors of objects in daily life.

[0024] 3. High spectral similarity and healthy, natural light color: The combined light spectrum has a high spectral similarity (SSI), which is close to sunlight of the same color temperature. The light color is close to natural, which can reduce visual fatigue. It is especially suitable for scenarios with long-term lighting, such as classrooms and libraries. It is also beneficial for the vision protection of special groups such as the elderly.

[0025] 4. Excellent photobiological safety and eye protection: The S / PRatio (blue light hazard weighting factor) and M / PRatio (melatonin inhibitory factor) are mostly around 100% of the K value of sunlight of the same color temperature, and some even exceed it. This indicates that in terms of photobiological indicators such as blue light hazard and melatonin inhibition effect, it is highly matched with natural light. Long-term use can effectively reduce the risk of eye damage and protect vision health.

[0026] 5. High consistency and stability: Under different color temperature adjustments, various photoelectric parameters such as CCT (color temperature), Duv (color deviation), Ra, Rf (color fidelity), and Rg (color saturation) maintain good consistency and stability, ensuring reliable and stable lighting quality. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A cross-sectional view of an LED light source for both elderly use and film / television applications based on a partitioned design, provided for an embodiment of the utility model.

[0029] Figure 2 A front view of an LED light source for both elderly and film / television applications based on a partitioned design, provided for an embodiment of the utility model.

[0030] Figure 3 A circuit diagram of an LED light source for both elderly and film / television applications based on a partitioned design, provided for an embodiment of the utility model.

[0031] Figure 4 The front and back views of the bracket for an LED light source suitable for both the elderly and film / television, based on a partitioned design, are provided for an embodiment of the utility model.

[0032] Figure 5 A cross-sectional view of a bracket for an LED light source suitable for both the elderly and film / television, based on a partitioned design, provided for an embodiment of the utility model.

[0033] Figure 6 The predicted spectrum of the inner cup 2700K model of the LED light source for both elderly and film / television use based on partition design, provided for the embodiment of the utility model.

[0034] Figure 7 The measured spectrum of the inner cup of the LED light source for both elderly and film / television applications based on a partitioned design is provided for the embodiment of the utility model.

[0035] Figure 8 The diagram shows the actual test report of the inner bowl cup of the LED light source for both elderly and film / television use based on partition design, which is provided for the embodiment of the utility model.

[0036] Figure 9 The image shows a test report of the spectral similarity (SSI) (350-830nm) of the inner cup of an LED light source for both elderly and film / television applications based on a partitioned design, provided for an embodiment of the utility model.

[0037] Figure 10 A color temperature (2700K) light distribution point diagram of the inner cup of an LED light source for both elderly and film / television applications based on a partitioned design, provided for an embodiment of the utility model.

[0038] Figure 11 The predicted spectrum of the outer cup of the LED light source for both elderly and film / television applications based on a partitioned design is shown in the embodiment of the utility model.

[0039] Figure 12 The measured spectrum of the outer cup of the LED light source for both elderly and film / television use based on a partitioned design, provided for an embodiment of the utility model.

[0040] Figure 13 The outer cup of the LED light source, which is designed for both elderly use and film and television, is shown in the actual test report diagram provided for the embodiment of the utility model.

[0041] Figure 14 The image shows the SSI (350-830nm) test report of the outer cup of the LED light source for both elderly and film / television applications based on a partitioned design, provided for an embodiment of the utility model.

[0042] Figure 15 A comparison chart of lutein absorption rates of LED light sources for both elderly and film / television applications based on a partitioned design, provided for embodiments of the utility model.

[0043] Figure 16 A color temperature (5700K) light distribution point diagram of the outer cup of the LED light source for both elderly and film / television applications based on a partitioned design, provided for an embodiment of the utility model.

[0044] Figure 17 The combined light spectrum of an LED light source for both elderly and film / television applications based on a partitioned design is provided for an embodiment of the utility model.

[0045] The following are the labeling elements in the figure: 1—Inner functional area; 2—Outer functional area; 3—Bracket dividing line; 4—Inner cup frame; 5—Outer cup frame; 6—Inner cup positive pin; 7—Outer cup positive pin; 8—Inner cup negative pin; 9—Outer cup negative pin; 10—Bracket marking point; 11—Pad dividing line; 12—Bracket heat dissipation base; 13—Heat dissipation base isolation strip; 14—Outer cup positive pad; 15—Inner cup positive pad; 16—Inner cup negative pad; 17—Outer cup negative pad; 18—Pad opening; 19—Bracket back plating; 20—Bracket copper layer; 21—Inner cup; 22—Functional area electroplating layer; 23 —Outer bowl; 24—Support length * width; 25—Inner bowl length * width; 26—Support bowl length * width; 27—Support bowl rim length * width; 28—Distance from rim to rim of the inner bowl; 29—Distance from functional area to rim of the outer bowl; 30—Support height; 31—Warm white fluorescent adhesive; 32—Neutral white fluorescent adhesive; 33—Ultraviolet LED chip with peak wavelength of 405-415nm; 34—Blue LED chip with main wavelength of 435-445nm; 35—Blue LED chip with main wavelength of 450-460nm; 36—Blue LED chip with main wavelength of 462-475nm. Detailed Implementation

[0046] The embodiments of the utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-17 The described embodiments are exemplary and intended to explain embodiments of the utility model, and should not be construed as limiting the utility model.

[0047] In one embodiment of the utility model, such as Figures 1-4 As shown, a dual-purpose LED light source for both the elderly and film and television is provided based on a partitioned design, including a 4-pin dual-cup type dual-path bracket and multiple LED chips.

[0048] The dual-path bracket is provided with an outer functional area 2 and an inner functional area 1. The plurality of LED chips include two violet LED chips 33 with peak wavelengths of 405-415nm, two blue LED chips 34 with main wavelengths of 435-445nm, two blue LED chips 35 with main wavelengths of 450-460nm, and two blue LED chips 36 with main wavelengths of 462-475nm, all disposed in the inner functional area 1, and two LED chips 36 disposed in the outer functional area 2. The LED chips 33 are violet LEDs with a peak wavelength of 405-415nm, 2 are blue LEDs 34 with a main wavelength of 435-445nm, 2 are blue LEDs 35 with a main wavelength of 450-460nm, and 2 are blue LEDs 36 with a main wavelength of 462-475nm. The LED chips located in the inner functional area 1 are arranged in a 2-parallel-4-series circuit, and the LED chips located in the outer functional area 2 are arranged in a 2-parallel-4-series circuit.

[0049] The inner functional area 1 is coated with warm white fluorescent adhesive 31 covering each of the LED chips thereon, and the dual-path bracket is coated with pure white fluorescent adhesive 32 covering the warm white fluorescent adhesive 31 and each of the LED chips on the outer functional area 2.

[0050] In this embodiment, as Figures 4-5 As shown, the dual-path bracket includes an outer cup 23, an inner cup 21 located within the outer cup 23, and a bracket back plating layer 19, a bracket copper layer 20, and a functional area electroplating layer 22 stacked from bottom to top below the outer cup 23. The inner cup 21 surrounds and forms the inner functional area 1, and the inner cup 21 and the outer cup 23 together surround and form the outer functional area 2. Each LED chip is disposed on the functional area electroplating layer 22.

[0051] Furthermore, such as Figures 4-5It can be seen that the front of the dual-channel bracket is provided with a bracket dividing channel 3, the width of which is 0.25±0.05mm, and the back is provided with a pad dividing channel 11, the width of which is 0.5±0.05mm, which is heat-sealed with plastic material. This can separate the positive and negative electrodes in the dual-channel bracket. According to the division of the bracket dividing channel 3 and the pad dividing channel 11, the back of the dual-channel bracket is provided with an outer cup positive electrode pad, an inner cup positive electrode pad, an inner cup negative electrode pad, and an outer cup negative electrode pad 17. The aforementioned outer cup positive electrode pad, inner cup positive electrode pad, inner cup negative electrode pad, and outer cup negative electrode pad 17 are all provided with pad openings 18, and are respectively connected to the outer cup positive electrode pin 7, inner cup positive electrode pin, inner cup negative electrode pin 8, and outer cup negative electrode pin 9 located on the outer side of the outer cup 23. The 18-hole pad setting can prevent solder balls from forming after over-reflow soldering, which would affect the quality.

[0052] The dual-path bracket has a bracket marking point 10 at its top, with the electrode facing the marking point being the negative electrode, used to prevent reverse soldering or solidification. A bracket heat dissipation base 12 is also provided at the bottom for heat dissipation. The heat dissipation base 12 has a length of 2.4±0.05mm and a width of 2.4±0.05mm. A heat dissipation base isolation strip 13 is also provided around the heat dissipation base 12, with a length of 3.1±0.05mm and a width of 0.7±0.05mm.

[0053] Furthermore, see Figure 5 The dimensions of the support bowl / cup (length x width 26) are 4.4±0.05mm x 4.4±0.05mm. The dimensions of the bowl / cup mouth (length x width 27) are 4.75±0.05mm x 4.75±0.05mm. The distance from the inner bowl / cup mouth to the outer bowl / cup mouth (28) is 0.55±0.05mm. The distance from the outer bowl / cup mouth to the outer bowl / cup mouth (29) is 0.75±0.05mm. The support height (30) is 1.0±0.05mm. The dimensions of the support (length x width 24) are 5.2±0.15mm x 5.2±0.15mm. The dimensions of the inner bowl / cup (length x width 25) are 2.5±0.05mm x 2.5±0.05mm.

[0054] The outer bowl-shaped rim 5 adopts an inverted trapezoidal structure design. The rim width of the upper bowl-shaped rim is 0.25±0.05mm, and the rim width of the lower bowl-shaped rim is 0.45±0.05mm. The inner bowl-shaped rim 4 is 0.25±0.05mm.

[0055] Furthermore, the back plating layer 19 of the bracket is formed on a copper substrate using a nickel-on-silver process, involving flash plating of copper, followed by nickel plating and then silver plating, with a silver thickness ranging from 2-3 μm. This creates a three-layer structure consisting of a flash-plated copper layer, a nickel plating layer, and a silver plating layer. The nickel plating material is dark nickel or semi-bright nickel, with a thickness of 0.5-1 μm, and the silver plating material is silver with a purity of not less than 99.5%. The nickel-on-silver process is primarily used to save costs while improving photoelectric conversion efficiency.

[0056] The copper layer 20 of the support is made of C194 red copper with a thickness of 0.2-0.3mm. The thickness range of C194 red copper is 0.2-0.3mm; this ensures the material's resistance to deformation while reducing thermal resistance and improving the LED's heat dissipation capacity.

[0057] The functional area electroplating layer 22 is formed on a copper substrate using a nickel-on-silver process, involving flash plating of copper, followed by nickel plating and then silver plating, with a silver thickness ranging from 3 to 5 μm. This creates a three-layer structure consisting of a flash-plated copper layer, a nickel plating layer, and a silver plating layer. The nickel plating layer is made of dark nickel or semi-bright nickel, with a thickness of 0.5-1 μm, and the silver plating layer is made of silver with a purity of not less than 99.5%. The nickel-on-silver process is primarily used to save costs while improving photoelectric conversion efficiency.

[0058] The bracket cup is made of PCT or EMC material and is pressed using a thermosetting plastic process. This selection of specific materials and processes is beneficial for heat dissipation of the LED light source.

[0059] In this embodiment, the warm white fluorescent adhesive 31 is made of a warm white fluorescent adhesive 31 solution, and the mass ratio of the components of the warm white fluorescent adhesive 31 solution is adhesive: blue powder with emission peak wavelength of 450-470nm: green powder with emission peak wavelength of 535-545nm: red powder with emission peak wavelength of 640-670nm = 11:(5.4-6.4):(10-11):(1.2-2.0); specifically, the mass ratio can be 11:5.4:10:1.2 or 11:6.4:11:2.0 or 11:6:10.5:1.6.

[0060] In this embodiment, the pure white fluorescent adhesive 32 is made of a pure white fluorescent adhesive 32 solution, and the mass ratio of the warm white fluorescent adhesive 31 solution is adhesive: blue powder with emission peak wavelength of 450-470nm: green powder with emission peak wavelength of 535-545nm: red powder with emission peak wavelength of 640-670nm = 11:(3.5-4.5):(2.5-3.5):(0.2-0.4). Specifically, the mass ratio can be 11:3.5:2.5:0.2, 11:4.5:3.5:0.4, or 11:4:3:0.3.

[0061] Furthermore, the green powder with an emission wavelength of 535-545nm is Lu3Al5O. 12 Ce 3+ The composition has a half-width of 80-120nm.

[0062] The red powder with an emission wavelength of 640-670nm is of CaAlSiN3:Eu composition and has a half-width of 80-120nm.

[0063] The blue phosphor with an emission wavelength of 450-470nm is composed of M3AlPO7:Eu, where M is Mg, Ca, Sr or Ba, and the half-width is 30-60nm.

[0064] In this embodiment, the light spectrum formed by the inner cup 21 satisfies the following relationship:

[0065] The above formula takes data at 1nm intervals and performs normalization processing, where: 350≤λ≤800, 0.06≤K1≤0.20, K2=0.29+K1, K3=0.43+K1, 405≤λ1≤415, 430≤λ2≤440, 445≤λ3≤455, 460≤λ4≤470.

[0066] The light color parameters obtained using the above formula are shown in Table 1 below:

[0067] Table 1 Combined Figures 6-8 As shown, the predicted spectrum and measured spectrum results of the 212700K model of the inner bowl cup of this utility model and their reports are presented.

[0068] Furthermore, the actual test report of the inner bowl cup 21 of this utility model is shown in Table 2 below:

[0069] Table 2 The spectral similarity SSI (350-830nm) test report for the inner bowl cup of this utility model can be found here. Figure 9 .

[0070] In this invention, the SSI (350-830nm) of the light source spectral similarity test report of the inner bowl cup 21 is 92, which is close to sunlight, approximating nature and resulting in a healthier light color.

[0071] The optical, color, and electrical parameters are summarized in Table 3 below:

[0072] Table 3 The following table shows a comparison between this invention and sunlight of the same color temperature:

[0073] Table 4 The light source of the inner cup 21 of this utility model meets the following colorimetric BIN, as shown in Table 5 below: Duv is between 0 and +0.0080, and the color temperature is between 2600 and 2800K, ensuring excellent output of intermediate combined light color parameters.

[0074]

[0075] Table 5 The spectral and color separation standard of the inner bowl cup 21 of this utility model is as follows: Figure 10 As shown.

[0076] Based on the above data, the core advantages of this utility model are: I. Excellent and stable core optical parameters.

[0077] High color rendering: Color rendering index Ra=98.3, special color rendering indices R9=95.4, R12=95.3, R13=98.2, R15=98, can accurately reproduce various colors, including saturated red, skin color and other special colors. In age-friendly lighting, it can clearly present the colors of medicine, food and other items. In film and television fill light, it can realistically reproduce the skin color of people and the colors of the scene.

[0078] Precise color temperature and color tolerance: Color temperature CCT=2710K, close to the standard 2700K color temperature, color deviation Duv=0.0040, extremely small color deviation, stable light color and in line with the human eye's comfortable perception of warm color temperature. It can create a warm and comfortable environment when used for lighting for the elderly, and can provide a stable warm light atmosphere when used for supplemental lighting in film and television.

[0079] High luminous efficacy: The luminous efficacy can reach about 120 lm / W (e.g., the luminous efficacy of item 1 is 122.64 lm / W). While ensuring high color rendering, it also has good energy efficiency and can save energy.

[0080] Second, it has high spectral similarity and healthy light color.

[0081] The spectral similarity index (SSI) (350-830nm) is 93, which is close to sunlight and approximates the natural spectrum. The spectral power distribution curve shows a high degree of matching with the solar spectrum, providing healthier light colors, reducing visual fatigue, and making it especially suitable for prolonged lighting for the elderly, thus reducing the risk of eye damage. It can also make the lighting in film and television footage more natural.

[0082] Third, it has good photobiological safety.

[0083] Compared to sunlight with the same color temperature of 2700K, S / PRatio=1.30 and M / PRatio=0.483, with similarity K values ​​of 97.01% and 94.89% respectively, are close to natural light in terms of photobiological indicators such as blue light hazard and melatonin inhibition effect. Long-term use is more eye-friendly and meets the health needs of age-appropriate lighting.

[0084] IV. Outstanding film and television-grade lighting performance.

[0085] The film and television lighting consistency index TLCI-2012 is 99, which is close to the perfect score. The color fidelity Rf is 97 and the color saturation Rg is 99. In film and television lighting scenarios, it can ensure the consistency and accuracy of color between different light sources, meeting the high requirements of professional film and television production for light color.

[0086] In another embodiment, the light spectrum formed by the outer cup 23 satisfies the following relationship:

[0087] The above formula takes data at 1nm intervals and performs normalization processing, where: 350≤λ≤800, 0.20≤K4≤0.35, 0.10≤K5≤0.40, 405≤λ1≤415, 425≤λ2≤440, 445≤λ3≤455, 460≤λ4≤470.

[0088] The light color parameters obtained using the above formula are shown in Table 6 below:

[0089] Table 6 The predicted spectrum, measured spectrum, and test report of the outer bowl cup model at 235700K in this embodiment are as follows: Figures 11-13 As shown.

[0090] The actual test report of the inner bowl cup 21 of this utility model is shown in Table 7 below:

[0091] Table 7 The spectral similarity SSI (350-830nm) test report for the outer bowl cup of this utility model is as follows: Figure 14 As shown.

[0092] As can be seen from the test report of the spectral similarity of the outer cup 23 light source, the SSI (350-830nm) is 91, which is close to sunlight, close to nature, and the light color is healthier.

[0093] The following table shows a comparison between this invention and sunlight of the same color temperature:

[0094] Table 8 Combined Figure 15 As shown, lutein absorption is superior to that of ordinary LED light sources, which has a good protective effect on the eyesight of the elderly.

[0095] The light color of the outer cup 23 light source meets the following colorimetric BIN (as shown in Table 9 below, with Duv between 0.002 and +0.010 and color temperature between 5500 and 6000K) to ensure excellent output of intermediate combined light color parameters.

[0096]

[0097] Table 9 like Figure 16 The image shown is a color temperature (235-700K) light distribution point diagram of the outer cup of this utility model.

[0098] Based on the data above, the 5700K LED light source of this invention has the following advantages: 1. High spectral similarity and healthy light color: spectral similarity of the outer cup 23 light source.

[0099] SSI (350-830nm) = 91, which is close to sunlight and approximates the natural spectrum. It can provide healthier light color, reduce visual fatigue, and is suitable for long-term lighting for the elderly.

[0100] 2. Excellent photobiological safety and good match with natural light: Compared with sunlight of the same color temperature of 5700K, S / PRatio=2.39 and M / PRatio=1.056, with similarity K values ​​of 103.02% and 103.53% respectively. In terms of photobiological indicators such as blue light hazard and melatonin inhibition effect, it is highly matched with natural light, making it more eye-friendly with long-term use.

[0101] 3. Significant protection for the eyesight of the elderly: The lutein absorption rate is 13.10%, which is better than that of ordinary LED light sources (such as 5700K Ra95 spectrum lutein absorption rate of 13.60%, Ra80 spectrum of 15.40%, Ra70 spectrum of 15.65%, etc.), and can better protect the eyesight of the elderly.

[0102] 4. Excellent optical parameters: According to the test report of the outer cup 23, the color rendering index Ra is mostly above 97, and some are even close to 99. The special color rendering index R9 also performs well and can accurately reproduce colors. At the same time, the luminous efficacy is high. For example, the luminous efficacy of serial number 19 reaches 152.36 lm / W. While ensuring high color rendering, it also has good energy efficiency.

[0103] The combined light spectrum data of this invention are shown in Tables 10-11 below:

[0104] Table 10

[0105] Table 11 This utility model embodiment also provides a packaging process for the above-mentioned LED light source based on partition design, suitable for both the elderly and film and television, which includes the following steps: S001: Two violet LED chips 33 with peak wavelengths of 405-415nm, two blue LED chips 34 with main wavelengths of 435-445nm, two blue LED chips 35 with main wavelengths of 450-460nm, and two blue LED chips 36 with main wavelengths of 462-475nm are sequentially fixed onto the peripheral functional area 2 of the dual-path bracket using a die bonder; S002: Two violet LED chips 33 with peak wavelengths of 405-415nm, two blue LED chips 34 with main wavelengths of 435-445nm, two blue LED chips 35 with main wavelengths of 450-460nm, and two blue LED chips 36 with main wavelengths of 462-475nm are sequentially fixed onto the inner functional area 1 of the dual-path bracket using a die bonder; S003: After the crystal solidification is completed, place it in an oven and bake at 160±5℃ for 2 hours±10 minutes. S004: Each LED chip is wire bonded in a 4-series 2-parallel configuration, using a J-type arc bonding process; S005: After completing the wire bonding of each LED chip, dehumidify for 2 hours ± 10 minutes at a temperature of 150±5℃. S006: Prepare a warm white fluorescent adhesive solution, and centrifuge the fluorescent adhesive solution to remove bubbles using a centrifuge degasser; S007: Dispense the fluorescent adhesive solution according to the color points and color parameters required by the design; S008: After dispensing, bake at a low temperature of 80±5℃ for 1h±10min to allow the fluorescent powder formed by the fluorescent adhesive solution to precipitate. S009: Prepare a pure white fluorescent adhesive solution, and centrifuge the fluorescent adhesive solution to remove bubbles using a centrifuge degasser; S010: Dispense the fluorescent adhesive solution according to the color points and color parameters required by the design; S011: After dispensing, bake at a low temperature of 80±5℃ for 1h±10min to allow the fluorescent powder formed by the fluorescent adhesive solution to precipitate. S012: After the phosphor semi-precipitation is completed, it is baked at a high temperature of 160±5℃ for 4h±10min. S013: After high-temperature baking is completed, perform spectral dispersion according to the given chromaticity coordinates and light color parameters; S014: Threshing as required; S015: After threshing is completed, the two light sources are split and color-sorted according to the given standard; S016: Label and put good products into the warehouse.

[0106] Combination Figure 17 It can be seen that the LED light source for both elderly and film / television applications based on partitioned design provided in this embodiment of the present invention has at least the following technical effects: 1. Full color gamut precise adjustment to adapt to various scenarios: By adjusting the input ratio of 2700K and 5700K, continuous and precise color temperature adjustment can be achieved across the entire color gamut from 2736K to 5776K, which can meet the lighting color temperature needs of different scenarios such as home, office, and commercial. For example, warm light creates a cozy atmosphere, while cool light provides a clear and bright working environment.

[0107] 2. High color rendering and true color reproduction: The color rendering index Ra is mostly above 96 in the full color gamut, and some are even close to 98. Special color rendering indices such as R9, R12, and R13 also perform well, accurately reproducing the true colors of objects. This is of great significance for both the display of artworks and the identification of colors of objects in daily life.

[0108] 3. High spectral similarity and healthy, natural light color: The combined light spectrum has a high spectral similarity (SSI), which is close to sunlight of the same color temperature. The light color is close to natural, which can reduce visual fatigue. It is especially suitable for scenarios with long-term lighting, such as classrooms and libraries. It is also beneficial for the vision protection of special groups such as the elderly.

[0109] 4. Excellent photobiological safety and eye protection: The S / PRatio (blue light hazard weighting factor) and M / PRatio (melatonin inhibitory factor) are mostly around 100% of the K value of sunlight of the same color temperature, and some even exceed it. This indicates that in terms of photobiological indicators such as blue light hazard and melatonin inhibition effect, it is highly matched with natural light. Long-term use can effectively reduce the risk of eye damage and protect vision health.

[0110] 5. High consistency and stability: Under different color temperature adjustments, various photoelectric parameters such as CCT (color temperature), Duv (color deviation), Ra, Rf (color fidelity), and Rg (color saturation) maintain good consistency and stability, ensuring reliable and stable lighting quality.

[0111] In summary, this utility model has significant advantages in multiple dimensions, comprehensively covering scenarios such as lighting for the elderly, supplementary lighting for film and television, and general lighting, as detailed below: I. Advantages in the field of age-friendly lighting.

[0112] 1. Precise adaptation to visual physiology: Through specific chip ratios and spectral optimization, it compensates for the decrease in light transmittance in the 400-500nm wavelength band caused by yellowing of the lens in the elderly, improves the spectral continuity in this band, and greatly improves the accuracy of the elderly in recognizing blue and purple objects, reducing the risk of daily color misjudgment.

[0113] 2. Excellent photobiological safety: It avoids the defects of strong blue light peaks in traditional light sources. The S / PRatio and M / PRatio are highly matched with sunlight of the same color temperature, which significantly reduces the risk of photochemical damage to the retina. Long-term use can reduce the probability of age-related macular degeneration in the elderly. The lutein absorption rate is better than that of ordinary LED light sources, which has a good protective effect on the vision of the elderly.

[0114] 3. Full color gamut with gentle adjustment and high color rendering: The color temperature adjustment of 2700K-5700K has small color tolerance and low color deviation, avoiding interference with the biological clock of the elderly; the high color rendering characteristics (Ra>95, R1-R15>90) can accurately reproduce key color information such as medicines and food, ensuring the safety of the elderly in their daily lives.

[0115] II. Advantages in the field of film and television lighting.

[0116] 1. Sunlight-level spectral matching: High spectral similarity (SSI) with minimal deviation from sunlight in key wavelengths. It is particularly excellent in terms of the R15 index for Asian skin tones, accurately reproducing skin texture and significantly reducing post-production color grading workload, meeting the "zero post-production" color rendering requirements for cinematic shooting.

[0117] 2. Ultra-high uniformity of light color: The special bowl-shaped structure and micro-optical texture design allow light to mix fully, with small color temperature deviation between the center and the edge. When multiple lights are combined for lighting, the color tolerance is low, which completely solves the problems of "half-and-half face" and "color block break" of traditional fill lights and improves the pass rate of film and television fill light equipment.

[0118] 3. Dynamic response and fine-tuning: With high-performance drive circuitry, the response time is short, which can meet the dynamic lighting needs of high-speed photography; the dimming depth reaches 0.1%, which can accurately simulate natural light and shadow changes and provide rich dimensions of light and shadow expression for film and television creation.

[0119] III. General performance and production advantages.

[0120] 1. Precise and stable adjustment across the entire color gamut: By adjusting the input ratio of 2700K and 5700K, continuous and precise color temperature adjustment across the entire color gamut of 2736K-5776K can be achieved, adapting to the lighting needs of various scenarios such as home, office, and commercial spaces.

[0121] 2. High color rendering and true color reproduction: The color rendering index Ra is mostly above 96 across the full color gamut, with outstanding performance in special color rendering indices, accurately reproducing the true colors of objects, which is of great significance for the display of artworks and the color recognition of everyday objects.

[0122] 3. Production yield and cost advantages: The independent partition design allows for partitioned testing and repair during production. Failure in a single area does not affect the overall function, increasing the production yield from 75-82% of the existing technology to over 93%, significantly reducing the manufacturing cost of high-end light sources.

[0123] 4. Outstanding energy efficiency and stability: While ensuring high color rendering and high spectral matching, it also has good luminous efficacy; under different color temperature adjustments, various photoelectric parameters maintain good consistency and stability, ensuring reliable and stable lighting quality.

[0124] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A dual-purpose LED light source for both elderly and film / television applications based on a zoned design, characterized in that, Includes a 4-pin dual-cup type dual-channel bracket and multiple LED chips; The dual-path bracket is provided with an outer functional area and an inner functional area. The multiple LED chips include two violet LED chips with a peak wavelength of 405-415nm, two blue LED chips with a main wavelength of 435-445nm, two blue LED chips with a main wavelength of 450-460nm, and two blue LED chips with a main wavelength of 462-475nm, all disposed in the inner functional area. The peripheral functional area also includes two violet LED chips with a peak wavelength of 405-415nm, two blue LED chips with a main wavelength of 435-445nm, two blue LED chips with a main wavelength of 450-460nm, and two blue LED chips with a main wavelength of 462-475nm. The multiple LED chips located in the inner functional area are arranged in a 2-parallel 4-series circuit configuration, and the multiple LED chips located in the peripheral functional area are also arranged in a 2-parallel 4-series circuit configuration. The inner functional area is coated with warm white fluorescent adhesive covering each of the LED chips thereon, and the dual-path bracket is coated with pure white fluorescent adhesive covering the warm white fluorescent adhesive and each of the LED chips on the outer functional area.

2. The LED light source for both elderly use and film / television applications based on partitioned design according to claim 1, characterized in that, The dual-path bracket includes an outer cup, an inner cup located inside the outer cup, and a bracket back plating layer, a bracket copper layer, and a functional area electroplating layer stacked from bottom to top below the outer cup. The inner cup surrounds the inner functional area, and the inner cup and the outer cup together surround the outer functional area. Each LED chip is disposed on the functional area electroplating layer.

3. The LED light source for both elderly use and film / television applications based on partitioned design according to claim 2, characterized in that, The back coating of the bracket is a three-layer structure consisting of a copper plating layer, a nickel plating layer, and a silver plating layer stacked together.

4. The LED light source for both elderly use and film / television applications based on partitioned design according to claim 3, characterized in that, The thickness of the silver plating layer ranges from 2 to 3 μm.

5. The LED light source for both elderly and film / television applications based on partitioned design according to claim 2, characterized in that, The copper layer of the bracket is made of C194 red copper with a thickness of 0.2-0.3mm.

6. The LED light source for both elderly use and film / television applications based on partitioned design according to claim 2, characterized in that, The functional area electroplating layer is a three-layer structure consisting of a stacked copper plating layer, a nickel plating layer, and a silver plating layer.

7. The LED light source for both elderly and film / television applications based on partitioned design according to claim 6, characterized in that, The thickness of the silver plating layer ranges from 3 to 5 μm.

8. The LED light source for both elderly and film / television applications based on a zoned design according to claim 2, characterized in that, The support bowl is made of PCT or EMC material.

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