229 results about "Color rendering index" patented technology

The embodiment of the invention provides an intelligent illumination automatic adjustment method and device based on illumination intensity and personnel detection, and reliability evaluation and abnormity correction are carried out on data by synchronously collecting environment illumination intensity and personnel activity data. An illumination activity association model is innovatively constructed, and feature fusion is realized by using a fuzzy logic algorithm. The system establishes a complete evaluation index system including illumination uniformity, a color rendering index and a glare value, and performs constraint optimization based on an illumination scene adaptation model. Through introducing a dynamic compensation mechanism of a personnel detection probability value and a time period priority factor, accurate illumination adjustment control is realized. The method breaks through the limitation of dimming in a traditional fixed mode, and provides a comprehensive technical solution for an intelligent lighting system.

The invention relates to the technical field of semiconductors, and particularly discloses a multiband LED chip and a preparation method thereof, and a white light LED light source, the LED chip comprises a light-emitting layer, and the light-emitting layer comprises a first cyan light multi-quantum well layer, a second long-wave blue light multi-quantum well layer, a third short-wave blue light multi-quantum well layer and a fourth purple light multi-quantum well layer which are sequentially stacked in the epitaxial direction; the first cyan light multi-quantum well layer, the second long-wave blue light multi-quantum well layer, the third short-wave blue light multi-quantum well layer and the fourth purple light multi-quantum well layer are each of a periodic structure formed by alternately stacking well layers and barrier layers, and the light-emitting wavelengths of the first cyan light multi-quantum well layer, the second long-wave blue light multi-quantum well layer, the third short-wave blue light multi-quantum well layer and the fourth purple light multi-quantum well layer are sequentially decreased. And the forbidden band widths of the barrier layers are sequentially decreased. According to the LED chip, the overall excitation efficiency can be effectively improved, and the output full-spectrum white light LED light source is higher in color rendering index, better in stability, less in damage to human eyes and high in light emitting efficiency.

The invention relates to the technical field of photoelectricity, and discloses a full-spectrum LED epitaxial wafer, a preparation method thereof and an LED chip, the epitaxial wafer comprises a substrate, and the substrate is sequentially provided with a buffer layer, an N-type GaN layer, a multispectral light-emitting well layer and a P-type GaN layer; the multispectral light-emitting well layer comprises a first light-emitting well layer, a second light-emitting well layer and a third light-emitting well layer which are stacked in sequence, the first light-emitting well layer comprises a plurality of groups of InxGa (1-x) N quantum well layers, AlaGa (1-a) N interface layers and first GaN quantum barrier layers which are stacked in sequence, the second light-emitting well layer comprises a plurality of groups of InyGa (1-y) N quantum well layers, AlbGa (1-b) N interface layers and second GaN quantum barrier layers which are stacked in sequence, and the third light-emitting well layer comprises a plurality of groups of InzGa (1-z) N quantum well layers, AlcGa (1-c) N interface layers and third GaN quantum barrier layers which are stacked in sequence. According to the full-spectrum LED epitaxial wafer provided by the invention, the luminous efficiency and the color rendering index of a full-spectrum chip can be improved.

The light source module comprises a first light-emitting unit, a second light-emitting unit, a third light-emitting unit and a fourth light-emitting unit which are electrically independent from one another and have different light colors, and the light color of the single-color light-emitting unit is optimized by the light source module, so that the color temperature coverage range of white light obtained by light mixing is wide; compared with the prior art, the light source module has the advantages that the coverage range is from 1800 K to 20000 K, meanwhile, the light source module has good color rendering property, the color rendering index CRI is larger than 90 in the color temperature range of 1800-20000 K, the color rendering index CRI is larger than 95 in the color temperature interval range of 2100-20000 K, the light quality of the light source module is superior to that of an existing RGB, RGBW and other all-in-one light source, and the light source module is more suitable for the field of general indoor illumination. Meanwhile, color light can be compatible by controlling the multiple light emitting units, and a multi-color light mixing system capable of giving consideration to high-quality white light and color light atmosphere at the same time is formed.

A light source module, a lighting system and a lamp. The light source module comprises a first light-emitting unit (100), a second light-emitting unit (200) and a third light-emitting unit (300) which are electrically independent of each other, light emitted from the light-emitting units being mixed to form white light. By means of the selection of the light colors and spectral characteristics of the light-emitting units, the white light obtained by the light source module has a wide color temperature coverage range and a color deviation Duv value less than 0.003, thereby solving the problem of white light color deviation. In addition, the white light spectrum of the light source module simulates a target spectrum, when the correlated color temperature is 4000K or above, the target spectrum being the solar spectrum, and when the correlated color temperature is lower than 4000K, the target spectrum being the blackbody radiation spectrum. Because the spectrum simulates the solar or blackbody radiation spectrum, the obtained white light spectrum has a good color rendering index and spectral similarity, such that the color of the white light of the light source module is closer to that of daylight, thereby being more adapted to the field of general lighting.

The invention provides a light generating system (1000) configured to generate system light (1001) having a spectral power distribution with spectral intensity at a plurality of wavelengths within the wavelength range of 380-780 nm, wherein relative to a total radiant flux of the system light (1001) in the 380-780 nm wavelength range, 15-40% of the total radiant flux is within the 385-440 nm wavelength range, and 60-85% of the total radiant flux is within the 440-780 nm wavelength range, and wherein the system light (1001) has an R9 value of at maximum 85, and a color rendering index selected from the range of 55-85.

The invention provides a light generating system (1000) comprising one or more first light generating devices (110), one or more second light generating devices (120), and one or more third light generating devices (130), wherein: —the one or more first light generating devices (110) are configured to generate white first device light (111) having a first color rendering index CRI1 and a first correlated color temperature Tc1; —the one or more second light generating devices (120) are configured to generate white second device light (121) having a second color rendering index CRI2 and a second correlated color temperature Tc2; —the one or more third light generating devices (130) are configured to generate third device light (131) having a third dominant wavelength λd3 selected from the range of 470-500 nm; —CRI1−CRI2≥10; CRI1≥85; Tc2−Tc1≥1000K; Tc1≤3500K; and Tc2≥3000K; and—the light generating system (1000) is configured to generate system light (1001) comprising one or more of the first device light (111), the second device light (121), and the third device light (131).

The invention provides a preparation method of a perovskite cyan light illuminant film and a white light emitting diode, the light emitting surface of the white light emitting diode is provided with the perovskite cyan light illuminant film, and the perovskite cyan light illuminant film can reduce the color temperature of the white light emitting diode. The color rendering index of the white light emitting diode is improved; the perovskite blue light illuminant film absorbs blue light which is emitted by the white light emitting diode and has a wavelength less than 455nm, and compensates for the deficiency of blue light with a wavelength range of 470-520nm; the chemical formula of the cyan light illuminant is CsPb (BrCl) 3: Ba; wherein Ba is a doped barium ion. According to the perovskite blue light illuminant film, the color rendering index of a WLED is improved, and meanwhile blue light emitted by an LED chip is absorbed, so that harm to a human body is reduced.

The microwave neodymium lamp is composed of a magnetron, a rectangular waveguide, a resonant cavity and a quartz lamp tube, the magnetron is powered by a transformer to generate 2.45 GHz microwaves, and the 2.45 GHz microwaves are transmitted to the rectangular waveguide through a transmitting antenna. The Nd I < 3->-Na system neodymium compound in the quartz lamp tube is excited to emit light by coupling a cone resonant cavity through a slit with a specific size. The ideal microwave light source with the lighting effect larger than 150 Lm / W and the color rendering index higher than 95 can be provided.

A light emitting device includes one or more light emitting elements and a plurality of fluorescent materials, and emits a first light, a second light, and a third light, wherein the first light has a correlated color temperature between 1,500 K and 3,500 K and a color rendering index R9 of 50 or more, the second light has a correlated color temperature between 3,500 K and 5,500 K and a color rendering index R9 of 50 or more, the third light has values of X and Y coordinates in the chromaticity diagram of the CIE1931 color system smaller than the values of X and Y coordinates at a color temperature of 5,500 K on the black body radiation locus, and a light having a correlated color temperature of 6,500 K has a color rendering index R9 of 50 or more and a melanopic ratio of 1.0 or more.

The invention provides a europium ion doped titanate compound as well as a preparation method and application thereof, and relates to the technical field of rare earth luminescent materials. The chemical formula of the titanate compound provided by the invention is K2Ti6O13: xEu < 3 + >, the titanate compound is in a monoclinic system. A proper amount of Eu < 3 + > ions are doped in K2Ti6O13, so that the prepared rare earth fluorescent powder has higher color rendering index and quantum yield, and the luminescent property of a white light LED can be greatly improved; as K2Ti6O13 has good electrochemical performance and relatively high conductivity, the rare earth fluorescent powder provided by the invention can also be used in the fields of illumination, display, photocatalysis and energy storage. And on the other hand, the preparation method provided by the invention is simple in process, mild in condition, convenient for large-scale production and wide in development and application space.

The invention relates to the technical field of semiconductors, and particularly discloses an LED chip and a white light LED light source, the LED chip comprises a substrate and an epitaxial layer arranged on the substrate, and the epitaxial layer comprises a light emitting layer. The light-emitting layer comprises a first wavelength multi-quantum well layer, a second wavelength multi-quantum well layer, a third wavelength multi-quantum well layer and a fourth wavelength multi-quantum well layer which are sequentially stacked in the epitaxial direction; wherein lambda1 > lambda2 > lambda3 = lambda4, 460 nm < = lambda1 < = 480 nm, 445 nm < = lambda2 < = 460 nm, and 430 nm < = lambda3 = lambda4 < = 445 nm; each multi-quantum well layer is of a periodic structure formed by alternately stacking well layers and barrier layers, the barrier layer of the first wavelength multi-quantum well layer and the barrier layer of the second wavelength multi-quantum well layer are doped with Si, the barrier layer of the fourth wavelength multi-quantum well layer is doped with Mg, and the barrier layer of the third wavelength multi-quantum well layer is a material layer which is not intentionally doped with Mg and Si. The LED chip serves as an excitation light source for exciting the red and green mixed fluorescent powder layer, the color rendering index of the output full-spectrum white light LED light source is higher, and meanwhile higher luminous efficiency is achieved.

The invention discloses a multi-channel LED spectrum adjusting method and system. The method comprises the steps that a light source containing three LED channels is configured; wherein the first LED channel light source outputs short-wave purple light of 400-430 nm, and a purple light chip packaged by packaging glue containing first fluorescent powder is adopted; the second LED channel light source outputs full-wave-band white light of 400-700 nm, and a purple light chip packaged by packaging glue containing second fluorescent powder is adopted; the third LED channel light source outputs long-wave red light of 700-780 nm, and a blue light chip packaged by packaging glue containing third fluorescent powder is adopted; collecting spectral data of a target area through a four-node cross-distributed spectral sensor to obtain a current spectrum; determining a deviation value between the current spectrum and a preset template; and dynamically adjusting the three LED channel light sources according to the deviation value. The radiation intensity of short-wave purple light and long-wave red light can be remarkably improved, the color rendering index is optimized, and the high-precision illumination requirement is met.

The invention relates to the technical field related to energy-saving illumination control, in particular to an energy-saving illumination method, system and equipment integrating tasks and human body perception, and the method comprises the steps: dividing task scenes, configuring reference illumination parameters, evaluating an illumination comfort index, dynamically adjusting output power and spectral distribution, and determining an adaptive perception interval. And setting an illumination adaptive switching mechanism, when task scene switching is detected, performing illumination parameter smooth transition in combination with the adaptive sensing interval, and generating a non-dominated sorting optimization strategy according to energy consumption feedback and illumination comfort index optimization control. The technical problems that energy-saving control depends on fixed threshold adjustment, excessive low illumination is caused by energy consumption reduction, and visual fatigue is aggravated are solved, task scene division and reference parameter configuration are achieved, fuzzy control is adopted to adjust output power and spectral distribution in real time, and the real-time adjustment of the output power and spectral distribution is achieved in an adaptive sensing interval. Energy consumption optimization is carried out on the premise that the color rendering index and the illumination are guaranteed, and the energy efficiency of the lighting system is improved.

The invention discloses a high-color-rendering-index and high-thermal-conductivity composite fluorescent ceramic for solid-state illumination and a preparation method thereof. The composition of the composite fluorescent ceramic is xLu2.94 Al5O12: 0.02 Ce < 3 + >-K1. 98SiF6: 0.02 Mn < 4 + >, x refers to the mass fraction of LuAG in KSF, and x is greater than or equal to 1wt% and less than or equal to 10wt%. The preparation method comprises the following steps: preparing Lu2.94 Al5O12: 0.02 Ce < 3 + > green fluorescent powder by adopting a solid-phase reaction method, preparing K1. 98SiF6: 0.02 Mn < 4 + > nanoscale fluoride powder by adopting a hydrothermal synthesis method, respectively weighing the two kinds of fluorescent powder according to a chemical formula xLu2.94 Al5O12: 0.02 Ce < 3 + >-K1. 98SiF6: 0.02 Mn < 4 + >, loading into a graphite mold, carrying out vacuum sintering, carrying out air annealing, and then carrying out double-sided polishing to obtain the composite fluorescent ceramic. The color rendering index of the ceramic is obviously improved and reaches up to 90 or above under the excitation of a blue light LED chip with the wavelength of 450 nm. By adding LuAG, the heat conductivity and luminous efficiency of the KSF can be effectively improved, and meanwhile, the method is easy to realize industrial production.

The invention provides a light generating system (1000) configured to generate system light (1001), wherein the light generating system (1000) comprises N first light generating devices (110) and M second light generating devices (120), wherein: (A) each first light generating device (110) comprises a first light source (10) and a first luminescent converter (2100); (B) the first light source (10) is configured to generate first light source light (11); (C) the first luminescent converter (2100) comprises a first luminescent material (210) and a second luminescent material (220); the first luminescent material (210) is configured to convert part of the first light source light (11) into first luminescent material light (211) having a first luminescent material centroid wavelength (λlc1) selected from the range of 510-570 nm; the second luminescent material (220) is configured to convert part of the first light source light (11) into second luminescent material light (221) having a second luminescent material centroid wavelength (λlc2) selected from the range of 625-635 nm; (D) each first light generating device (110) is configured to generate first device light (111) having a spectral power distribution in the wavelength range of 380-780 nm with at maximum 30% of the spectral power provided by the first light source light (11) and at least 70% of the spectral power provided by the first luminescent material light (211) and the second luminescent material light (221); (E) each second light generating device (120) comprises a second light source (20) and a second luminescent converter (2200); (F) the second light source (20) is configured to generate second light source light (21); (G) the second luminescent converter (2200) comprises a third luminescent material (230); the third luminescent material (230) is configured to convert at least part of the second light source light (21) into third luminescent material light (231) having a third luminescent material centroid wavelength (λlc3) selected from the range of 600-660 nm; (H) each second light generating device (120) is configured to generate second device light (121) having a spectral power distribution in the wavelength range of 380-780 nm with at least 70% of the spectral power provided by the third luminescent material light (231) and at maximum 30% of the spectral power provided by the second light source light (21); and (I) in a first operational mode of the light generating system (1000), the system light (1001) is white light having a correlated color temperature in a range from 2000-6500 K and a color rendering index of at least 80.

The invention discloses a preparation method of a low-blue-light LED panel lamp, and belongs to the technical field of LED illumination. According to the method, through blue light chip screening, composite fluorescent powder system optimization, multi-layer optical structure design and heat dissipation coordinated regulation and control, the radiation power proportion of the blue light wave band (430-460 nm) is smaller than or equal to 5%, meanwhile, it is guaranteed that the color rendering index Ra is larger than or equal to 85, and the lighting effect is larger than or equal to 100 lm / W. The core innovation of the LED lamp is that the double-effect eye protection layer of quantum dot doped silica gel and cerium yttrium aluminum garnet composite fluorescent powder is adopted, and the optical matching design of the micro-nano texture light guide plate and the gradual change type diffusion film is combined, so that the technical problems that an existing low-blue-light LED lamp is low in lighting effect, poor in color rendering property, uneven in blue light filtering and the like are solved. The blue light hazard level of the prepared LED panel lamp reaches RG0 level, and the LED panel lamp is suitable for long-time close-range illumination scenes such as classrooms, offices and bedrooms and has wide application prospects.

The utility model provides a light source device and a lamp. A containing groove is formed in a support of the light source device. The first blue light chip is arranged on the groove bottom of the accommodating groove, and the first blue light chip is used for emitting blue light of which the peak wavelength is a; the second blue light chip is arranged on the groove bottom of the containing groove, the second blue light chip and the first blue light chip are arranged in a spaced mode, the second blue light chip is used for emitting blue light with the peak wavelength being b, and b is larger than a; the first fluorescent structure covers the first blue light chip; the second fluorescent structure covers the second blue light chip and the first fluorescent structure, and the second fluorescent structure comprises yellow-green fluorescent powder; according to the invention, a regional excitation structure can be formed, light of different colors can be excited in a targeted manner to complement spectrum deficiency, and the overall color rendering index can be improved; meanwhile, mutual absorption loss between different fluorescent structures is reduced through dual-wavelength hierarchical excitation and physical isolation of the fluorescent structures, and optimization of light extraction efficiency is facilitated.

The invention discloses an LED glass cement compatibility testing method, and relates to the technical field of LED testing, and the method comprises the steps: welding an LED at the center of a PCB; uniformly coating the bottom of the high-temperature-resistant glass bottle with glass cement, and after the surface of the glass cement is dried, enabling the opening of the high-temperature-resistant glass bottle to face downwards, surrounding the LED and inversely buckling the high-temperature-resistant glass bottle on the PCB; glass cement consistent with the bottle bottom is smeared on the peripheral side of a bottle opening of the high-temperature-resistant glass bottle, so that the LED and the glass cement at the bottle bottom are sealed in the closed space; putting the LED glass cement compatibility test device into a high-low temperature test box, setting the temperature to be 80 DEG C, the heating time to be 20 minutes and the relative humidity to be 50%, and performing constant-temperature aging for 500 hours; taking out the aged LED glass cement compatibility test device from the high-low temperature test box, separating the high-temperature-resistant glass bottle from the PCB, communicating a positive lead and a negative lead of the PCB with a circuit, electrifying the LED, measuring the aged color temperature value, and calculating whether the color temperature change rate, the color rendering index and the color tolerance of the LED reach set thresholds or not.

The utility model discloses an LED light source structure comprising a substrate, the substrate is connected with a light emitting unit and a first light blocking ring surrounding the outer side of the light emitting unit, and the light emitting unit comprises a purple light LED wafer, a blue light LED wafer, an ultraviolet light LED wafer, a red light generating structure and an infrared light generating structure. The surface of the blue light LED wafer is provided with first fluorescent powder or first fluorescent conversion glue capable of converting part of blue light into yellow light, purple light, blue light, yellow light, ultraviolet light, red light and infrared light are integrated, the light source structure can generate wider spectral distribution, and the color quality and the color rendering index of light are improved. The lighting quality can be improved, and the requirements of specific application fields such as plant growth lamps, special lighting in medical equipment and the like can be met. Through the design of the multi-wavelength LED wafer combination, spectral components are controlled more accurately, so that the energy conversion efficiency is optimized, unnecessary energy loss is reduced, higher luminous efficiency is achieved, and meanwhile energy consumption is reduced.

The utility model provides an educational lighting LED, which comprises an LED body, the LED body comprises a support, a fluorescent glue layer, a pin, a first wafer, a second wafer and a bowl cup, the bowl cup is arranged in the support, the first wafer and the second wafer are arranged in the bowl cup in series and connected with the support, the pin is connected with the support, and the fluorescent glue layer is arranged on the support. The fluorescent glue layer is arranged in the bowl cup in a wrapping manner, and the fluorescent glue layer is a mixture layer formed by combining blue powder, green powder, red powder, infrared fluorescent powder and transparent silica gel; the wavelength of the first wafer is set to be 450 to 455 nm, and the wavelength of the second wafer is set to be 465 to 470 nm; the color rendering index Regt of the LED body; 95; a color saturation index Rgt of the LED body; 95; a color fidelity index Rfgt of the LED body; 90; students are enabled to be more active and more positive in learning, the effective brightness of the light source is high, the students are wider in view and clearer in object watching, and myopia prevention of the students is facilitated.

The utility model provides an endoscope operating lamp adjustable in color and brightness, and relates to the technical field of medical instruments. The single-chip microcomputer is used for controlling the first driving module, so that the first driving module transmits the driving current to the first endoscope lamp module to drive the first endoscope lamp module to emit the target visible light, and the single-chip microcomputer can be used for controlling the first driving module to adjust the driving current to change the color and / or brightness of the target visible light. In the endoscopic surgery, a doctor can give an instruction to the single chip microcomputer so as to guide the single chip microcomputer to control the first driving module to adjust the driving current, and therefore the color and / or brightness of the target visible light are / is changed. Namely, the color and the brightness of the endoscope operating lamp can be adjusted at will, the color rendering index of the endoscope operating lamp is compensated, multi-color and multi-brightness lamplight can be provided for a doctor to select, the normal eye using habit of the doctor is met, and meanwhile visual fatigue caused by the fact that the doctor performs an operation under single-color lamplight for a long time is avoided.

The present invention is applicable to the field of light source technology, and provides a light-emitting device and a light-emitting system, wherein the light-emitting device includes a driving circuit, a red light source, a green light source, a blue light source, a first color temperature white light source and a second color temperature white light source; the driving circuit is respectively connected to the red light source, the green light source, the blue light source, the first color temperature white light source and the second color temperature white light source to respectively adjust the luminous flux of each light source, and emits white light in a first color temperature range by matching the first color temperature white light source, the red light source and the green light source, so that the weight of the red light component emitted by the white light source during light emission can be reduced, thereby reducing the use of red phosphor and increasing the luminous flux of the white light in the first color temperature range, and by adjusting the luminous flux of the red light source and the green light source through the driving circuit, the color rendering index of the white light in the first color temperature range can be improved, so that the white light in the first color temperature range has a higher luminous flux and a higher color rendering index.

The present invention relates to the technical field of lightning. Disclosed are a circadian lighting fixture system and a control method therefor. A circadian lighting fixture comprises a base, and a first light source, a second light source, a third light source, a fourth light source, and a fifth light source which are arranged on the base, wherein the first light source emits white light, the second light source emits red light, the third light source emits green light, the fourth light source emits blue light and the fifth light source emits yellow light. The control method comprises: adjusting the light emitting ratios of the first light source, the second light source, the third light source, the fourth light source and the fifth light source, so that the M / P ratio of the circadian lighting fixture reaches a first preset value, the color rendering index thereof reaches a second preset value, and the spectral radiation efficiency thereof reaches a third preset value. By implementing the present invention, a circadian lighting fixture system having suitable circadian effect and lighting effect can be obtained.

The application relates to the field of LED health lighting, and discloses a method for LED mixed generation of sunlight-like white light and an LED lamp set. The method comprises the following steps: determining the color points of each LED lamp bead around a blackbody radiation line, independently packaging each LED lamp bead, and comprising LED chips with specific peak wavelengths and various fluorescent powders; determining l target sunlight-like white light color points on the blackbody radiation line, and calculating l groups of luminous flux parameters; selecting a group of luminous flux parameters from the l groups of luminous flux parameters according to a preset target, and using the group of luminous flux parameters to control the m LED lamp beads to form mixed light, i.e. sunlight-like white light. According to the combination of different intensities of various light sources, the application changes the single waveband excitation of fluorescent powder for emitting white light by the existing full-spectrum white light LED into multi-waveband LED chip mixed dimming, fills the gap of the spectrum of about 480 nm, has a higher color rendering index, and has a more continuous mixed spectrum, and can realize sunlight-like dimming along the blackbody radiation line.

A light emitting device includes a light emitting element having a light emission peak wavelength of 430 nm or more and 470 nm or less, and a fluorescent member containing a first fluorescent material having a light emission peak wavelength of 510 nm or more and less than 590 nm and a second fluorescent material having a light emission peak wavelength of 590 nm or more and 670 nm or less and containing a first fluoride fluorescent material having a composition included in the compositional formula represented by the following formula (1):where A1 includes K, M1 includes Si and Al, a and b satisfy 0<a<0.2 and 5<b<7, and c represents the absolute value of the charge of [M11-aMnaFb] ions.The light emitting device satisfies the following condition (A) or (B):the condition (A) is that an average color rendering index Ra is 80 or more and 90 or less and a color rendering index R9 is 50 or more and 90 or less; andthe condition (B) is that an average color rendering index Ra is 80 or more and 87 or less and a color rendering index R9 is 50 or more.

The utility model relates to the technical field of LED light sources, and discloses an LED light source capable of improving spectral continuity, which comprises a substrate, the substrate is provided with a light-emitting area, and the light-emitting area is provided with a plurality of short-wave blue light-emitting chips, a plurality of long-wave blue light-emitting chips and a plurality of red light-emitting chips; the light-emitting area is filled with a fluorescent glue layer; the fluorescent glue layer covers the plurality of short-wave blue light-emitting chips, the plurality of long-wave blue light-emitting chips and the plurality of red light-emitting chips; green fluorescent powder and red fluorescent powder are mixed in the fluorescent glue layer; in the process that light rays emitted by the short-wave blue light emitting chips, the long-wave blue light emitting chips and the red light emitting chips penetrate through the fluorescent glue layer, green fluorescent powder and red fluorescent powder are excited respectively, so that the emitted light rays are high in spectral continuity and have the advantages of being high in color temperature, low in blue light, high in color rendition degree and the like; the light emitted by the LED light source is closer to the solar spectrum, and the color rendering index is higher.

The invention provides a light source device and a lamp, a light emitting chip of the light source device is used for outputting first color light, the first color light is blue light, and first sub-color light and second sub-color light of the first color light are arranged along a continuous and progressive increasing wave band; the fluorescent structure is configured to absorb the first sub-color light and excite second color light based on the first sub-color light, and the wave band of the second color light is larger than that of the first color light; the fluorescent structure is further configured to transmit the second sub-color light so as to output mixed color light of the mixed second sub-color light and the second color light; the blue light chip is adopted to output the mixed color light, the cost can be reduced, the first color light is divided into the first sub-color light and the second sub-color light, the first sub-color light is used for exciting the second color light such as yellow-green light and dark red light, the second sub-color light directly emits out to compensate for the blue light wave band which is originally lost in the mixed color light, and the light efficiency is improved. And the color rendering index of the mixed color light can be improved.

The application provides a method for calculating the duty cycle of white light color temperature when RGBY four-way mixed light is generated, which comprises the following steps: four color points of RGBY form a quadrilateral on a CIE 1931 chromaticity diagram; an intersection A1(x A1 , y A1 ) of the straight line and the straight line is obtained; two intersections of the straight line and the other two straight lines are obtained, and only one of the two intersections is located in the interior of a triangle formed by three color points of three-way light used for mixed light, and the one is selected as A2(x A2 , y A2 ); a line segment connecting A1(x A1 , y A1 ) and A2(x A2 , y A2 ) is divided into n nodes, the corresponding duty cycles are calculated by using the three color points of the three-way light used for mixed light, and the duty cycle of the remaining one-way light is calculated by using a two-way mixed light algorithm; the highest color rendering index duty cycle is selected from the obtained n groups of duty cycles; and the relationship between the duty cycle of the four-way light and the color temperature is fitted into a function. The method can effectively reduce the product cost and improve the use value of the RGB mixed light product.

The invention provides a light generating system (1000) configured to provide system light (1001), wherein the light generating system (1000) comprises a first light generating device (110), a second light generating device (120), a third light generating device (130), and a luminescent element (200); wherein: (A) the first light generating device (110) comprises a first solid state light source (10), and wherein the first light generating device (110) is configured to generate first device light (111) having a first centroid wavelength (λc1), wherein the first centroid wavelength (λc1) is selected from the range of 440-460 nm; (B) the second light generating device (120) comprises a second solid state light source (20), and wherein the second light generating device (120) is configured to generate second device light (121) having a second centroid wavelength (λc2), wherein the second centroid wavelength (λc2) is selected from the range of 485-505 nm; (C) the third light generating device (130) comprises a third solid state light source (30), and wherein the third light generating device (130) is configured to generate third device light (131) having a third centroid wavelength (λc3), wherein the third centroid wavelength (λc3) is selected from the range of 520-570 nm; (D) the luminescent element (200) comprises a first luminescent material (210) configured to convert at least part of the first device light (111) received by the first luminescent material (210) into first luminescent material light (211); wherein the first luminescent material (210) comprises a luminescent material of the type M'xM2-2xAX6 doped with tetravalent manganese, wherein M' comprises an alkaline earth cation, wherein M comprises an alkaline cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, wherein X comprises a monovalent anion, at least comprising fluorine; and (E) the light generating system (1000) is configured such that (a) the luminescent element (200) is configured in the transmissive mode, wherein less than 5% of the first device light (111) is transmitted through the luminescent element (200), (b) the second device light (121) and the third device light (131) are transmitted by the luminescent element (200); and (c) in an operational mode the system light (1001) is white light having a correlated color temperature selected from the range of 1500-6500 K and a color rendering index of at least 80.