292 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 provides an LED light source uniformity and color deviation detection method, which comprises the following steps: setting environmental parameters of a constant temperature and humidity test box, monitoring the environment in the box in real time through a temperature and humidity sensor, and triggering a temperature and humidity control system to adjust when detecting that the temperature and humidity deviate from a set value; according to the initial color characteristic database, placing an LED light source in the constant-temperature and constant-humidity test box for an accelerated aging test, and obtaining spectral data of the light source at different time points by adopting a spectrum analyzer; calculating chromaticity coordinates, color temperatures and color rendering indexes corresponding to the spectral data at different time points, calculating a color deviation value of the LED light source, and fitting a change curve of the color deviation along with time; and according to an accelerated aging test result of the LED light source, calculating the color maintenance life of the light source in a high-temperature and high-humidity environment, and completing color deviation detection through a color stability uniformity index of the LED light source.

The invention relates to the technical field of lighting, in particular to a driving power supply control circuit, a control method and a lighting application method. Comprising the steps that an acquisition module acquires spectral data and temperature data of a current environment; the receiving module receives the target color rendering index, the target color temperature and the target illumination; the control module is connected with the acquisition module and the receiving module, and is used for calculating a PWM duty ratio needing to be compensated according to the temperature data, obtaining a target PWM duty ratio based on the current color rendering index Ra, the current correlated color temperature CCT, the current illumination and the control parameters, and outputting a PWM signal based on the target PWM duty ratio and the PWM duty ratio needing to be compensated; and independent and stable constant-current signals are finally output by using the voltage balancing circuit and the driving module. The problems that an existing LED driving power source is single in function and lacks self-adaptive control capacity and monochromatic light trailing are solved. The LED powder-free lamp can continuously and stably operate, and meanwhile, high color rendering index and dynamic light color balance are achieved.

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 an LED multi-light-color regulation and control method and system based on a multi-objective evolutionary algorithm, and the method comprises the steps: firstly obtaining the spectrum and electric power data of each single-color LED, and carrying out the preprocessing of the data through combining a cubic spline interpolation method and a fitting function; secondly, optimizing light color indexes such as color coordinates, color rendering index, color temperature, SDCM value and power consumption by designing an evaluation function; the core of the algorithm is to iteratively optimize the population through individual evaluation, survival of the fittest, heredity and mutation operations by using a multi-target genetic algorithm until an optimal PWM combination meeting all light color index requirements is found. Specifically, the method has the advantages of being high in flexibility, good in expansibility and the like, can adapt to different LED channel configurations, provides a light color regulation and control scheme with high pertinence, is particularly suitable for factory regulation of fluorescent powder-free multi-primary-color LED lamps, and provides an efficient and automatic solution for light color optimization.

The invention relates to the technical field of endoscope optical performance testing, in particular to an improved endoscope optical performance testing method based on machine vision. The method converts the optical performance test of the endoscope from the traditional manual operation into automatic measurement, and specifically comprises the following steps of: measuring images of the endoscope under different test conditions by using a machine vision system so as to calculate various optical indexes of the endoscope; a mode of combining a Canny edge detection algorithm with a corresponding physical target is adopted, so that the calculation precision is improved; in the calculation process of indexes such as a field angle and an a value, a high-precision camera is used for analyzing imaging of a target, the calculation rate is improved by calculating geometric parameters and image features, and when sensitive indexes such as effective luminosity, unit relative distortion and a color rendering index are calculated, software is used for processing data obtained by a machine vision system, so that the calculation efficiency is improved. And personal errors are avoided.

Provided is a light-emitting device, a lighting appliance, and a street light that emit light with minimal negative effects on the behavior of sea turtles and which makes irradiated objects easily visible to humans. The light-emitting device includes a light-emitting element having an emission peak wavelength within a range from 400 nm to 490 nm; and a first phosphor having an emission peak wavelength within a range from 570 nm to 680 nm, wherein the light-emitting device, lighting appliance, and street light emit light that has a correlated color temperature of 1950 K or less, an average color rendering index Ra of 40 or greater, a full width at half maximum of an emission spectrum indicating a maximum emission intensity in an emission spectrum of the light-emitting device of 110 nm or less, and a sea turtle light attraction index T derived from Equation (1) of 0.416 or less.

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.

The invention provides a light generating system (1000) comprising n first vertical cavity surface emitting lasers (110) and a control system (300), wherein n≥1, wherein each of the n first vertical cavity surface emitting lasers (110) is configured to generate first laser light (111) changing between at least two centroid wavelengths (λnc,1, λnc,2) having a wavelength difference of at least 10 nm, with a changing frequency of at least 50 Hz; wherein the control system (300) is configured to control the n first vertical cavity surface emitting lasers (110) such that system light (1001) is generated comprising the first laser light (111) of at least one of the n first vertical cavity surface emitting lasers (110), and wherein the control system (300) is configured to control a spectral power distribution of the system light (1001), wherein the system light (1001) is white light having a correlated color temperature in a range from 1800 K to 8000 K and a color rendering index of at least 70.

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 relates to the field of LED healthy lighting, and discloses a method for generating sun-like white light through LED mixing and an LED lamp set. Comprising the steps that the color point of each LED lamp bead is determined around a black-body radiation ray, and each LED lamp bead is independently packaged and comprises an LED chip with a specific peak wavelength and various kinds of fluorescent powder; determining l target type solar white light color points on the black body radiation line, and calculating to obtain l groups of luminous flux parameters; and selecting one group of luminous flux parameters from the l groups of luminous flux parameters according to a preset target, and controlling the m LED lamp beads to form mixed light, namely sun-like white light. According to the combination of different intensities of various light sources, the problem that an existing full-spectrum white-light LED emits white light by exciting fluorescent powder from a single wave band and has a single color temperature is changed into multi-wave-band LED chip mixed dimming, the sunken part of the wave band about 480 nm of the spectrum is filled, the color rendering index is higher, the mixed spectrum is more continuous, and the light emitting efficiency is improved. And sunlight-like dimming along black-body radiation rays can be realized.

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.