Full-spectrum lighting device and method giving consideration to main lighting and atmosphere lighting

Abstract

The invention provides a full-spectrum lighting device and method giving consideration to both main lighting and atmosphere lighting, an RGB light source scheme of which the spectrum is close to natural color light is adopted, the full-spectrum lighting device comprises an LED light source of which the spectrum is close to sky blue, falloff red and fluorescent green, and the LED light source structurally comprises an electroluminescent part and a photoluminescent part. And unique spectrum output is realized. The LED mixed color can generate white light with different color temperatures, the color rendering index is high, and the color gamut coverage rate meets specific requirements. According to the invention, the full spectrum of natural light can be simulated, a continuous spectrum and a high color rendering index (CRI) can be provided, the problems of discontinuous spectrum and high blue light energy of an existing lighting product are effectively solved, a healthy, comfortable and natural light environment is created for a user, the demand of the user for natural scenery atmosphere and daily healthy lighting demand are met, and the user experience is improved. The LED lamp has remarkable technical advantages in the fields of home lighting, decorative lighting and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of lighting devices, and in particular relates to a full-spectrum lighting device and method for taking both main lighting and atmosphere lighting into consideration. Background Art

[0002] In modern society, people have increasing requirements for living and working environments. They not only pursue health and comfort, but also desire to experience the atmosphere of natural scenery in their daily lives. This requires lighting technology solutions that take into account both main lighting and ambient lighting.

[0003] However, existing lighting products that take into account both main lighting and atmosphere have the opportunity to achieve a higher color rendering index, but often have problems such as discontinuous spectrum and high blue light energy. Figure 1 As shown, it is difficult to meet users' pursuit of health and comfort. From the perspective of spectral characteristics, the spectrum of existing LED light sources is concentrated in the blue light band (380-470nm), and the red and green light bands are not covered enough, resulting in limited color rendering; short-wave blue light (peak wavelength <450nm) accounts for a large proportion, which can easily cause visual fatigue after long-term use; existing color mixing technology is difficult to maintain a high color rendering index (CRI ≥ 90) within a wide color temperature range (such as 1700K-13000K).

[0004] Therefore, it is necessary to study technologies that can simulate the characteristics of natural light and achieve full-spectrum lighting, so as to meet users' needs for natural scenery atmosphere while meeting their daily healthy lighting needs. Summary of the invention

[0005] In order to solve the problems of spectral discontinuity, excessive blue light energy, and narrow color temperature adjustment range in the existing LED lighting technology, the present invention provides a full-spectrum lighting device and method that takes into account both main lighting and atmosphere lighting, thereby realizing the combination of natural light simulation and healthy lighting to solve the above-mentioned technical defects.

[0006] In the first aspect, the present invention proposes a full-spectrum lighting device that takes into account both main lighting and atmosphere lighting, including an LED light source structure of an electroluminescent part and a photoluminescent part, wherein the electroluminescent part includes: a blue LED unit, wherein the peak wavelength of the spectrum of the blue LED unit is 380-470nm, the half-wave width is 5-50nm, the light energy in the 480-500nm band accounts for 30%-50%, and the spectrum similarity with the CIE standard light source D65 in the range of 380-780nm is ≥85%; a red LED unit, wherein the spectrum of the red LED unit covers the 610-780nm band, the main wavelength range is 620-650nm, and the spectrum configuration has a spectrum similarity of ≥85% with the CIE standard sunset red spectrum; a green LED unit, wherein the spectrum of the green LED unit covers the 510-550nm band, the main wavelength range is 520-540nm, and the spectrum configuration has a spectrum similarity of ≥85% with the CIE standard firefly green spectrum;

[0007] The photoluminescent part comprises: a phosphor conversion layer, which covers the surface of the blue LED unit and includes cyan phosphor with a main peak emission spectrum ranging from 480 to 510 nm, yellow phosphor with a main peak emission spectrum ranging from 510 to 560 nm, orange-red phosphor with a main peak emission spectrum ranging from 560 to 610 nm, red phosphor with a main peak emission spectrum ranging from 610 to 650 nm, and dark red phosphor with a main peak emission spectrum ranging from 650 to 780 nm.

[0008] It also includes: a control module, which is configured to dynamically adjust the luminous intensity ratio of the blue LED unit, the red LED unit and the green LED unit to generate white light with a color temperature range of 1700K to 13000K and a color rendering index CRI≥90.

[0009] Preferably, the material of the blue light chip of the blue LED unit is gallium nitride or indium gallium nitride, and the substrate material is single crystal silicon, silicon carbide, sapphire, gallium nitride, gallium arsenide, aluminum nitride or zinc oxide.

[0010] Further preferably, the phosphor conversion layer is phosphor; the photoluminescent parts of the blue LED unit and the red LED unit include cyan phosphor between 480 and 510 nm, yellow phosphor between 510 and 560 nm, orange-red phosphor between 560 and 610 nm, red phosphor between 610 and 650 nm, and deep red phosphor between 650 and 780 nm; the photoluminescent part of the green LED unit includes cyan phosphor between 480 and 510 nm, yellow phosphor between 510 and 560 nm, orange-red phosphor between 560 and 610 nm, and red phosphor between 610 and 650 nm.

[0011] Further preferably, the phosphor is one compound or a mixture of multiple compounds, and the phosphor includes aluminate, gallate, molybdate, tungstate, silicate, nitride, nitrogen oxide or sulfide; the luminescence center of the phosphor includes rare earth ions and transition metal ions.

[0012] Further preferably, the mass proportion of the phosphors in each band in the phosphor conversion layer is: 10% to 20% for cyan phosphor, 30% to 40% for yellow phosphor, 20% to 30% for orange-red phosphor, and 10% to 20% for red and crimson phosphor.

[0013] Preferably, the LED light source structure also includes: the color gamut coverage of the LED light source structure is 7.1% to 13.5%, covering at least one color gamut standard including sRGB, Adobe RGB 98, NTSC, CIE, UHDTV, Apple, ProPhoto, DCI-P3, Pointer's, and Rec.709.

[0014] Preferably, it also includes: when the color rendering index of the generated white light is ≥95, the color temperature coverage range is 1700K~9600K; when the color rendering index of the generated white light is ≥90 and <95, the color temperature coverage range is 1700K~13000K.

[0015] Preferably, the spectral similarity C s The calculation formula is as follows:

[0016] Where Δλ is the wavelength integration step; Y R (λ) is the radiation power distribution of the reference spectrum; Y T (λ) is the spectral radiation power distribution of the light source to be measured.

[0017] In a second aspect, an embodiment of the present invention provides a full-spectrum lighting method that takes into account both main lighting and ambient lighting, including the full-spectrum lighting device as described in the first aspect, and further including the following steps:

[0018] S1. Provide a blue LED unit, a red LED unit, a green LED unit and a phosphor conversion layer;

[0019] S2, exciting the blue LED unit, and converting the blue light into a continuous spectrum covering 480-780nm through the phosphor conversion layer;

[0020] S3, synchronously adjusting the luminous intensity of the red LED unit and the green LED unit to supplement the 610-780nm red light and the 510-560nm green light;

[0021] S4. Calculate the RGB luminous ratio according to the target color temperature to generate white light with a color rendering index CRI ≥ 90.

[0022] Preferably, it also includes:

[0023] Detect the color temperature and brightness of ambient light;

[0024] Automatically adjust the RGB ratio based on the detection results to match the output spectrum with the ambient light.

[0025] Compared with the prior art, the beneficial results of the present invention are:

[0026] The technical solution of the present invention can provide a new lighting experience, which not only restores the realism of natural light visually, but also emotionally satisfies people's yearning for the natural environment. By precisely controlling the spectral output of RGB lamp beads, the technical solution can create a continuous spectrum and a high color rendering index (CRI), thereby reproducing the effect of outdoor natural light in the indoor environment, providing users with a healthy, comfortable and natural light environment. It can greatly increase the technical competitiveness of home lighting and decorative lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and are used together with the description to explain the principles of the present invention. It will be easy to recognize other embodiments and many expected advantages of the embodiments because they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with each other. The same reference numerals refer to corresponding similar parts.

[0028] Figure 1 It is a spectrum effect diagram of an existing product that takes into account both main lighting and ambient lighting in the background technology of the present invention;

[0029] Figure 2 A schematic diagram of a light source structure of a full-spectrum lighting device that takes into account both main lighting and ambient lighting according to an embodiment of the present invention;

[0030] Figure 3 Spectral configuration diagram of a blue LED light source according to a specific embodiment of the present invention;

[0031] Figure 4 Spectral configuration diagram of a red LED light source according to a specific embodiment of the present invention;

[0032] Figure 5 Spectral configuration diagram of a green LED light source according to a specific embodiment of the present invention;

[0033] Figure 6It is a real-life effect diagram of the whole lamp color and a schematic diagram of the RGB mode of an LED light source structure of a specific embodiment of the present invention;

[0034] Figure 7 This is a spectrum diagram of mixed white light of a whole lamp according to a specific embodiment of the present invention;

[0035] Figure 8 It is a schematic flow chart of the full-spectrum lighting method for taking both main lighting and ambient lighting into consideration according to the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In modern society, people have higher and higher requirements for living and working environment. They not only pursue health and comfort, but also desire to experience the atmosphere of natural scenery in their daily lives. That is, lighting technology solutions that take into account both main lighting and atmosphere lighting. However, although existing lighting products that take into account both main lighting and atmosphere lighting have the opportunity to achieve a higher color rendering index, they often have problems such as discontinuous spectrum and high blue light energy. Figure 1 As shown, it is difficult to meet the user's pursuit of health and comfort. Therefore, it is necessary to study the technology that can simulate the characteristics of natural light and realize full-spectrum lighting, so as to meet the user's demand for natural scenery atmosphere and the user's daily healthy lighting needs.

[0039] Therefore, the present invention aims to provide an innovative full-spectrum lighting solution, using RGB lamp beads that are close to natural color light to create a lighting device that can simulate the full spectrum of natural light to meet users' needs for natural landscape atmosphere.

[0040] In a first aspect, an embodiment of the present invention discloses a full-spectrum lighting device that takes into account both main lighting and ambient lighting, such as Figure 2 As shown, the LED light source structure includes an electroluminescent part and a photoluminescent part, and the electroluminescent part includes:

[0041] A blue LED unit, wherein the peak wavelength of the spectrum of the blue LED unit is 380-470nm, the half-wave width is 5-50nm, the light energy in the 480-500nm band accounts for 30%-50%, and the spectrum similarity with the CIE standard light source D65 in the range of 380-780nm is ≥85%;

[0042] A red LED unit, wherein the spectrum of the red LED unit covers a wavelength range of 610 to 780 nm, the main wavelength range is 620 to 650 nm, and the spectrum configuration has a spectrum similarity of ≥85% to the CIE standard sunset red spectrum;

[0043] Green LED unit, the spectrum of the green LED unit covers the 510-550nm band, the main wavelength range is 520-540nm, and the spectrum configuration has a spectrum similarity of ≥85% with the CIE standard firefly green spectrum;

[0044] The photoluminescent portion comprises:

[0045] A phosphor conversion layer, the phosphor conversion layer covers the surface of the blue LED unit, and includes cyan phosphor with a main peak emission spectrum range of 480 to 510 nm, yellow phosphor with a main peak emission spectrum range of 510 to 560 nm, orange-red phosphor with a main peak emission spectrum range of 560 to 610 nm, red phosphor with a main peak emission spectrum range of 610 to 650 nm, and dark red phosphor with a main peak emission spectrum range of 650 to 780 nm;

[0046] Also includes:

[0047] A control module is configured to dynamically adjust the luminous intensity ratio of the blue LED unit, the red LED unit and the green LED unit to generate white light with a color temperature range of 1700K to 13000K and a color rendering index CRI≥90.

[0048] Specifically, in this embodiment, the electroluminescence refers to the semiconductor LED chip, and the photoluminescence part refers to the fluorescent powder. The fluorescent powder can be a single compound or a mixture of multiple compounds.

[0049] Electroluminescence includes or mainly includes blue light chips that produce peak wavelengths within 380 to 470 nm; the half-wave width of the LED chip light spectrum is 5 to 50 nm, and the corresponding materials are: gallium nitride, indium gallium nitrogen, and the corresponding substrate materials are single crystal silicon, silicon carbide, sapphire, gallium nitride, gallium arsenide, aluminum nitride, and zinc oxide.

[0050] Furthermore, the blue LED unit, i.e. the photoluminescent part of the blue LED light source includes or mainly includes cyan phosphor between 480 and 510 nm, yellow phosphor between 510 and 560 nm, orange-red phosphor between 560 and 610 nm, red phosphor between 610 and 650 nm, and deep red phosphor between 650 and 780 nm.

[0051] The red LED unit, i.e. the photoluminescent part of the red LED light source, includes or mainly includes cyan phosphor between 480 and 510 nm, yellow phosphor between 510 and 560 nm, orange-red phosphor between 560 and 610 nm, red phosphor between 610 and 650 nm, and deep red phosphor between 650 and 780 nm.

[0052] The green LED unit, that is, the photoluminescent part of the green LED light source includes or mainly includes cyan phosphor between 480 and 510 nm, yellow phosphor between 510 and 560 nm, orange-red phosphor between 560 and 610 nm, and red phosphor between 610 and 650 nm.

[0053] The phosphor includes but is not limited to aluminates, gallates, molybdates, tungstates, silicates, nitrides, nitrogen oxides, and sulfides; the luminescent center of the phosphor includes but is not limited to rare earth ions and transition metal ions.

[0054] In a specific embodiment, the present invention discloses an RGB light source solution with a spectrum close to natural color light, comprising:

[0055] 1) A blue LED light source with a spectrum close to sky blue, the configuration of the blue LED light source spectrum is as follows Figure 3 The chip material is InGaN / GaN multi-layer quantum well structure, with a peak wavelength of 440nm±2nm; the spectral characteristics are shown in Table 1 below.

[0056] Table 1 Spectral characteristics of blue LED light source

[0057] Wavelength (nm) Light intensity (normalized unit) Function 440 1.0±0.2 Excite the main peak of phosphor 460 1.2±0.2 Supplementary blue light band 480～500 Energy ratio 40% ± 5% Matching D65 spectrum

[0058] 2) A red LED light source with a spectrum close to sunset red, the spectrum configuration of the red LED light source is as follows: Figure 4 The chip material is AlGaInP, the main wavelength is 635nm±5nm; the spectrum covers 610~780nm, and the red light accounts for ≥80% (CIE sunset red similarity 87%).

[0059] 3) A green LED light source with a spectrum close to firefly green, the spectrum configuration of the green LED light source is as follows: Figure 5 The chip material is InGaN, the main wavelength is 530nm±3nm; the spectrum covers 510~550nm, and the green light purity is ≥90% (CIE firefly green similarity is 89%).

[0060] The formula for calculating spectral similarity is as follows:

[0061]

[0062] Where Δλ is the wavelength integration step; Y R (λ) is the radiation power distribution of the reference spectrum; Y T (λ) is the spectral radiation power distribution of the light source to be measured.

[0063] In a specific embodiment, the mass proportion of the phosphors in each band in the phosphor conversion layer is: 10% to 20% for cyan phosphor, 30% to 40% for yellow phosphor, 20% to 30% for orange-red phosphor, and 10% to 20% for red and crimson phosphor.

[0064] In this embodiment, the LED color mixing of the LED light source structure can mix white light of different color temperatures. When the color rendering index of the generated white light is ≥95, the color temperature coverage range is 1700K~9600K; when the color rendering index of the generated white light is ≥90 and <95, the color temperature coverage range is 1700K~13000K.

[0065] Specifically, when the color rendering index of white light is ≥90 and <95, the color temperature covers a range of 1700K to 13000K, and the performance of different color temperature parameters is shown in Table 2 below.

[0066] Table 2

[0067] Color Temperature GFC SDCM (ANSI) R9 R15 B Ratio G Ratio R-ratio 1800K±100K ≥94％ ≤6 75～82 94～97 1％～4％ 0～3％ 95％～99％ 2200K±100K ≥95％ ≤6 78～98 91～99 0％～16％ 0％～36％ 64％～88％ 2700K±100K ≥96％ ≤6 69～96 86～95 2％～26％ 8％～65％ 30％～70％ 3000K±100K ≥97％ ≤6 65～92 85～94 8％～31％ 10％～73％ 14％～61％ 3500K±100K ≥97％ ≤6 61～86 84～93 22％～40％ 12％～75％ 0％～51％ 4000K±100K ≥98％ ≤6 61～84 83～93 37％～47％ 11％～63％ 0％～43％ 5000K±100K ≥98％ ≤6 54～84 82～94 57％～59％ 6％～43％ 0％～36％ 5700K±100K ≥98％ ≤6 54～84 83～94 64％～68％ 4％～33％ 0％～31％ 6500K±100K ≥99％ ≤6 52～85 83～94 71％～75％ 0％～25％ 0％～29％ 8000K±100K ≥99％ ≤6 71～84 89～93 84％～86％ 11％～14％ 0％～5％ 10000K±100K ≥99％ ≤6 61～81 86～92 92％～94％ 0％～5％ 1％～8％ 12000K±100K ≥99％ ≤6 54～59 84～85 97％～98％ 0％ 2％～3％

[0068] Combined with Table 2 above, GFC (goodness of fit) measures the matching degree between the actual spectrum and the target spectrum (such as D65), and ≥90% is excellent. GFC (goodness of fit) gradually increases from 94% at 1800K to 99% at 12000K, indicating that the spectrum is closer to natural light at high color temperature. GFC ≥94% proves that the phosphor ratio and RGB compensation algorithm of the present invention effectively fill the spectrum gap of traditional LEDs.

[0069] SDCM (ANSI) color deviation value, ≤7 means that the human eye cannot distinguish color difference (ANSI standard). SDCM is 6 at all color temperatures, indicating excellent color consistency and meeting film-level lighting requirements. SDCM=6 indicates that color deviation is controllable when color temperature is switched, avoiding color difference interference in stage or medical scenes.

[0070] R9 (deep red color rendering), special color rendering index (R9 ≥ 50 is the threshold for healthy lighting, R9 ≥ 80 is the requirement for film and television level). Fluctuation controllable: R9 minimum value is 52 (6500K), maximum value is 98 (2200K), and the whole segment is ≥ 50; high color temperature optimization: R9 rises to 71 at 8000K because the red light compensation algorithm is activated. R9 ≥ 50 ensures the color authenticity of red light sensitive scenes (such as surgical lighting and food display).

[0071] R15 (Asian skin color rendering), a color rendering index for yellow skin (R15 ≥ 85 is high quality). Stable high value: except for 12000K (84-85), the other color temperatures R15 are ≥ 83, and the highest is 99 (2200K). R15 ≥ 83 meets the stringent requirements of the Asian market for skin color restoration and is suitable for live broadcasting and beauty lighting.

[0072] Low color temperature (<3000K), red light dominates, simulates candlelight / sunset atmosphere, and maximizes R9 (82-98); neutral color temperature (5500K), blue-green light dominates, matches natural daylight, optimizes CRI (96) and DCI-P3 coverage (98.1%); high color temperature (>8000K), blue light is enhanced, supplements cool white light scenes (such as operating rooms), and suppresses ultraviolet emission (<1%) through phosphor conversion.

[0073] Dynamic matching achieves seamless switching from warm light to cool white and avoids the "excessive blue light" problem of traditional LEDs (B ratio ≤ 97%); the red light ratio drops sharply as the color temperature increases, but is compensated by the phosphor layer (deep red 670nm) to maintain R9 ≥ 50.

[0074] Based on the above analysis, the LED light source structure of the present invention has obvious performance advantages:

[0075] Full color temperature range GFC ≥ 94% + SDCM = 6, exceeding ANSI film and television lighting standards (SDCM ≤ 7, GFC ≥ 90%);

[0076] The dual high values ​​of R9 / R15 solve the shortcomings of traditional LEDs in red light and skin color rendering.

[0077] When the color rendering index of white light is ≥95, the color temperature covers a range of 1700K to 9600K, and the performance of different color temperature parameters is shown in Table 3.

[0078] Table 3

[0079] Color Temperature GFC SDCM (ANSI) R9 R15 B Ratio G Ratio R-ratio 1800K±100K ≥94％ ≤6 72～79 93～95 0％～2％ 0％～7％ 93～100％ 2200K±100K ≥95％ ≤6 79～95 93～99 0％～10％ 11％～32％ 66％～83％ 2700K±100K ≥97％ ≤6 80～99 93～99 7％～21％ 21％～50％ 39％～62％ 3000K±100K ≥97％ ≤6 81～99 92～99 14％～27％ 25％～53％ 28％～52％ 3500K±100K ≥98％ ≤6 82～99 93～99 27％～37％ 26％～53％ 17％～40％ 4000K±100K ≥98％ ≤6 83～100 93～99 39％～45％ 24％～48％ 11％～32％ 5000K±100K ≥98％ ≤6 78～99 92～100 57％～59％ 17％～37％ 6％～25％ 5700K±100K ≥99％ ≤6 80～99 93～98 65％～68％ 14％～30％ 4％～20％ 6500K±100K ≥99％ ≤6 78～99 93～99 72％～75％ 8％～22％ 4％～19％ 8000K±100K ≥99％ ≤6 78～99 94～99 81％～84％ 0％～84％ 6％～19％ 10000K±100K ≥99％ ≤6 87～89 94～95 90％ 0～1％ 9～10％

[0080] Combined with Table 3 above, GFC (goodness of fit) gradually increases from 94% at 1800K to 99% at 12000K. The spectrum at high color temperature is closer to natural light (such as the D65 standard), indicating that the phosphor ratio and RGB dynamic compensation algorithm effectively fill the spectral gap (such as the cyan / orange-red band).

[0081] SDCM (ANSI color tolerance) is stable at 6 in all color temperature ranges, which is better than the ANSI film and television lighting standard (≤7). In practical applications, it can ensure color consistency when color temperature is switched (such as no visual color difference interference in stage lighting).

[0082] R9 (deep red color rendering), dynamic range is 52 (6500K) ~ 98 (2200K), the whole section ≥ healthy lighting threshold (≥50), some color temperatures meet film and television levels (≥80); technical optimization: at 8000K, R9 is increased to 71 through the red light compensation algorithm, breaking through the shortcomings of traditional high color temperature LEDs.

[0083] R15 (Asian skin color rendering), stability: except for 12000K (84~85), the other color temperatures are ≥83, and the highest is 99 (2200K); Market value: meets the needs of accurate restoration of yellow skin color in live broadcast and beauty scenes.

[0084] In the RGB dynamic matching logic, low color temperature (<3000K), R: 70%~75%, red light dominates, simulating natural warm light (such as candlelight), and R9 is maximized to 98; neutral color temperature (5500K), B: 64% / G: 25%, blue-green light is dominant, matching the natural daylight spectrum, optimizing CRI and DCI-P3 color gamut coverage; high color temperature (>8000K), B: 84%~97%, strengthens blue light and suppresses ultraviolet emission (<1%), which is suitable for high-precision cold white light scenes such as operating rooms.

[0085] The silicate / nitride phosphor layer compensates the red light (670nm band) to solve the high color temperature R9 attenuation problem; the dynamic ratio algorithm is combined with PID feedback control to achieve smooth spectral transition when the color temperature is switched (ΔUV<0.001).

[0086] Based on the above analysis, the LED light source structure performance of the present invention exceeds:

[0087] The full color temperature range GFC ≥ 94% + SDCM = 6, meeting the dual standards of film and television level (ANSI 2025) and medical level (IEC 62471:2024); R9 / R15 dual high values ​​fill the application gap of traditional LEDs in red light-sensitive scenes.

[0088] Further, relative to the standard color gamut, the color gamut coverage of the light source of the embodiment of the present invention is at least greater than or equal to the values ​​in the following Table 4. In this embodiment, the color gamut coverage is calculated on the CIE 1931 chromaticity diagram.

[0089] Table 4

[0090] Color gamut Color gamut coverage (%) sRGB 12.4 Abode RGB 98 9.7 NTSC(1953) 9.5 NTSC(1987)SMPTE C 13.5 CIE (1931) 8 UHDTV (ITU-R BT.2020) 7.1 Apple 12.2 ProPhoto (ROMM RGB) 5.4 DCI-P3 9.9 Pointer's(maximum) 9.4 Rec.709 (BT.709) 12.4

[0091] As shown in Table 4 above, the color gamut coverage of the LED light source structure of the embodiment of the present invention is 7.1% to 13.5%, covering at least one color gamut standard including sRGB, Adobe RGB 98, NTSC, CIE, UHDTV, Apple, ProPhoto, DCI-P3, Pointer's, and Rec.709.

[0092] In a specific embodiment, the actual effect diagram of the whole lamp color of the LED light source structure of the present invention and the RGB mode are as follows: Figure 6 The mixed white light spectrum of the whole lamp is as follows Figure 7 shown.

[0093] In actual applications, a variety of atmosphere lighting effects can be achieved by adjusting the brightness and color ratio of the RGB lamp beads. In the bedroom scene, the blue LED light source, the red LED light source, and the green LED light source are lit in a specific ratio to create a warm and soft light. For example, the ratio of blue, red, and green light intensity is adjusted to 1:3:2, and the color temperature is about 2700K, creating a warm and comfortable sleeping environment for users. In the living room party scene, the light intensity ratio is adjusted to 3:2:3, and the color temperature is increased to about 4000K. The light is brighter and richer in color, which enhances the vitality of the space and meets the needs of users for atmosphere lighting in different scenes.

[0094] In actual production, the mixed white light spectrum is further optimized according to different application scenarios and user needs. In office places, adjust the mixed light ratio of RGB light sources to make the color rendering index reach above 95, and keep the color temperature at around 5000K to simulate the spectrum characteristics of natural light and improve employee work efficiency and visual comfort. In shopping mall lighting, optimize the spectrum according to the characteristics of goods and display needs. For jewelry products, increase the ratio of red and blue light to enhance color contrast and make jewelry more dazzling; for clothing products, adjust the spectrum to make the color rendering index reach above 92 to ensure the true restoration of clothing colors and enhance customer shopping experience.

[0095] The technical solution of the present invention can provide a new lighting experience, which not only restores the realism of natural light visually, but also emotionally satisfies people's yearning for the natural environment. By precisely controlling the spectral output of RGB lamp beads, the technical solution can create a continuous spectrum and a high color rendering index (CRI), thereby reproducing the effect of outdoor natural light in the indoor environment, providing users with a healthy, comfortable and natural light environment. It can greatly increase the technical competitiveness of home lighting and decorative lighting.

[0096] In a specific embodiment, the control module can realize dynamic color temperature adjustment through a control algorithm, and the control logic includes:

[0097] Input parameters: target color temperature (T), ambient light spectrum (feedback from detection module);

[0098] Output Regulation:

[0099]

[0100] Spectral closed-loop control: PID algorithm real-time correction to ensure similarity Cs ≥ 85%.

[0101] Through the control module, the RGB luminous intensity ratio is dynamically adjusted, the output color temperature is 1700K~13000K, CRI≥90, the ambient light is adaptive, the ambient spectrum is detected and the output is matched (such as matching the circadian rhythm of natural light).

[0102] In a second aspect, an embodiment of the present invention further discloses a full-spectrum lighting method that takes into account both main lighting and ambient lighting, including the full-spectrum lighting device as described in the first aspect, such as Figure 8 As shown, the following steps are also included:

[0103] S1. Provide a blue LED unit, a red LED unit, a green LED unit and a phosphor conversion layer;

[0104] S2, exciting the blue LED unit, and converting the blue light into a continuous spectrum covering 480-780nm through the phosphor conversion layer;

[0105] S3, synchronously adjusting the luminous intensity of the red LED unit and the green LED unit to supplement the 610-780nm red light and the 510-560nm green light;

[0106] S4. Calculate the RGB luminous ratio according to the target color temperature to generate white light with a color rendering index CRI ≥ 90.

[0107] Preferably, the method further includes: detecting the color temperature and brightness of the ambient light; and automatically adjusting the RGB ratio based on the detection result to match the output spectrum with the ambient light.

[0108] As a specific embodiment, in a home lighting scene, RGB light sources are used to mix colors to generate 3000K white light (CRI≥97), with blue accounting for 8% to 31%, green 10% to 73%, and red 14% to 61%, simulating the effect of natural daylight; in a commercial decoration scene, switch to RGB mode to create an atmospheric lighting effect of sunset red and firefly green through high color gamut coverage (such as DCI-P3 9.9%); in a healthy lighting scene, at a color temperature of 4000K, blue light accounts for 37% to 47%, and the color rendering index CRI≥98, which is suitable for office environments and reduces visual fatigue.

[0109] In summary, the present invention realizes full-spectrum lighting that takes into account both main lighting and atmosphere lighting through a unique RGB light source solution, light source structure design, and optimization of color mixing and color gamut characteristics. It has significant innovation and practicality and has broad application prospects in the field of lighting.

[0110] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A full-spectrum lighting device that takes into account both main lighting and ambient lighting, including an LED light source structure of an electroluminescent part and a photoluminescent part, characterized in that: The electroluminescent portion comprises: A blue LED unit, wherein the peak wavelength of the spectrum of the blue LED unit is 380-470nm, the half-wave width is 5-50nm, the light energy in the 480-500nm band accounts for 30%-50%, and the spectrum similarity with the CIE standard light source D65 in the range of 380-780nm is ≥85%; A red LED unit, wherein the spectrum of the red LED unit covers a wavelength range of 610 to 780 nm, the main wavelength range is 620 to 650 nm, and the spectrum configuration has a spectrum similarity of ≥85% to the CIE standard sunset red spectrum; Green LED unit, the spectrum of the green LED unit covers the 510-550nm band, the main wavelength range is 520-540nm, and the spectrum configuration has a spectrum similarity of ≥85% with the CIE standard firefly green spectrum; The photoluminescent portion comprises: A phosphor conversion layer, the phosphor conversion layer covers the surface of the blue LED unit, and includes cyan phosphor with a main peak emission spectrum range of 480 to 510 nm, yellow phosphor with a main peak emission spectrum range of 510 to 560 nm, orange-red phosphor with a main peak emission spectrum range of 560 to 610 nm, red phosphor with a main peak emission spectrum range of 610 to 650 nm, and dark red phosphor with a main peak emission spectrum range of 650 to 780 nm; Also includes: A control module is configured to dynamically adjust the luminous intensity ratio of the blue LED unit, the red LED unit and the green LED unit to generate white light with a color temperature range of 1700K to 13000K and a color rendering index CRI≥90.

2. The full-spectrum lighting device for both main lighting and ambient lighting according to claim 1, characterized in that: The material of the blue light chip of the blue LED unit is gallium nitride or indium gallium nitride, and the substrate material is single crystal silicon, silicon carbide, sapphire, gallium nitride, gallium arsenide, aluminum nitride or zinc oxide.

3. The full-spectrum lighting device for both main lighting and ambient lighting according to claim 1, characterized in that: The phosphor conversion layer is phosphor; The photoluminescent parts of the blue LED unit and the red LED unit include cyan phosphors between 480 and 510 nm, yellow phosphors between 510 and 560 nm, orange-red phosphors between 560 and 610 nm, red phosphors between 610 and 650 nm, and dark red phosphors between 650 and 780 nm; The photoluminescent part of the green LED unit includes cyan phosphor between 480 and 510 nm, yellow phosphor between 510 and 560 nm, orange-red phosphor between 560 and 610 nm, and red phosphor between 610 and 650 nm.

4. The full-spectrum lighting device for both main lighting and ambient lighting according to claim 3, characterized in that: The phosphor is a compound or a mixture of multiple compounds, and the phosphor includes aluminate, gallate, molybdate, tungstate, silicate, nitride, nitrogen oxide or sulfide; the luminescent center of the phosphor includes rare earth ions and transition metal ions.

5. The full-spectrum lighting device for both main lighting and ambient lighting according to claim 3, characterized in that: The mass proportions of the phosphors in each wavelength band in the phosphor conversion layer are: 10% to 20% for cyan phosphor, 30% to 40% for yellow phosphor, 20% to 30% for orange-red phosphor, and 10% to 20% for red and crimson phosphor.

6. The full-spectrum lighting device for both main lighting and ambient lighting according to claim 1, characterized in that: Also includes: The color gamut coverage of the LED light source structure is 7.1% to 13.5%, covering at least one color gamut standard including sRGB, Adobe RGB 98, NTSC, CIE, UHDTV, Apple, ProPhoto, DCI-P3, Pointer's, and Rec.

709.

7. The full-spectrum lighting device for both main lighting and ambient lighting according to claim 1, characterized in that: Also includes: When the color rendering index of the generated white light is ≥95, the color temperature coverage range is 1700K~9600K; When the color rendering index of the generated white light is ≥90 and <95, the color temperature coverage range is 1700K to 13000K.

8. The full-spectrum lighting device for both main lighting and ambient lighting according to claim 1, characterized in that: The spectral similarity C s The calculation formula is as follows: Where Δλ is the wavelength integration step; Y R (λ) is the radiation power distribution of the reference spectrum; Y T (λ) is the spectral radiation power distribution of the light source to be measured.

9. A full-spectrum lighting method that takes into account both main lighting and ambient lighting, characterized in that: The full-spectrum lighting device according to any one of claims 1 to 8 further comprises the following steps: S1. Provide a blue LED unit, a red LED unit, a green LED unit and a phosphor conversion layer; S2, exciting the blue LED unit, and converting the blue light into a continuous spectrum covering 480-780nm through the phosphor conversion layer; S3, synchronously adjusting the luminous intensity of the red LED unit and the green LED unit to supplement the 610-780nm red light and the 510-560nm green light; S4. Calculate the RGB luminous ratio according to the target color temperature to generate white light with a color rendering index CRI ≥ 90.

10. The full-spectrum lighting method for both main lighting and ambient lighting according to claim 9, characterized in that: Also includes: Detect the color temperature and brightness of ambient light; Automatically adjust the RGB ratio based on the detection results to match the output spectrum with the ambient light.

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