185 results about "Color rendering index" patented technology

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 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 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 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 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 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 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 device (100) comprising (i) a solid state light source (10) and (ii) a luminescent material element (200); wherein the solid state light source (10) is configured to generate light source light (11), wherein the luminescent material element (200) is configured to convert at least part of the light source light (11) into luminescent material light (201); wherein the light generating device (100) is configured to generate device light (101) comprising luminescent material light (201) and light source light (11) and having a color rendering index of at least 65; wherein the luminescent material element (200) comprises n1 first luminescent materials (210) being configured to emit luminescent material light having a centroid wavelength in the 440-590 nm wavelength range, and n2 second luminescent materials (220) being configured to emit luminescent material light having a centroid wavelength in the 590-780 nm wavelength range, wherein n1≥3, n2≥0, and (n1+n2)≥5.

The invention discloses a method and device for improving the color rendering index of an LED display screen, and the method comprises the steps: adding a first white light sub-pixel W1 and a second white light sub-pixel W2 in an RGB display unit of the LED display screen, and forming an RGBW1W2 screen; the method comprises the following steps: acquiring brightness characteristics of each sub-pixel in an RGBW1W2 screen, and constructing an RGBW1W2 screen characteristic conversion matrix according to the brightness characteristics; according to the to-be-transmitted rgb signal and the RGBW1W2 screen characteristic conversion matrix, obtaining an output signal of each sub-pixel in the RGBW1W2 screen; color temperature adjustment is achieved by adjusting the output proportion of the first white light sub-pixel W1 and the second white light sub-pixel W2. By adding W1 and W2 in the RGB display screen, the color temperature of the screen can be accurate, and a high color rendering index can be kept. Meanwhile, the method can ensure that the color temperature of the screen is accurate.

The invention relates to a zero-dimensional organic-inorganic hybrid halide perovskite green light material for a white light LED and a preparation method of the zero-dimensional organic-inorganic hybrid halide perovskite green light material. The chemical composition of the material is C6H14N2ZnCl4 doped with Mn < 2 + >. According to the invention, the novel 0-dimensional organic-inorganic hybrid halide perovskite crystal is prepared by adopting a hydrothermal method. The crystal does not emit light, but generates bright green light at 535nm after being doped with Mn < 2 + >, the light is derived from d-d transition of tetrahedral coordination Mn < 2 + >, and the maximum quantum yield can reach 70%. The white light LED prepared from the material has good performance, the correlated color temperature is 6003K, and the color rendering index is 79. In addition, the material can also be used in the field of security and anti-counterfeiting. The preparation method disclosed by the invention is simple, low in cost and environment-friendly, the product has excellent photophysical properties and high yield, and a novel green luminescent material is provided for the field of white light LEDs.

The invention discloses a light source device and an optical system. The light source device comprises an exciting light module, a fluorescent module, a supplementary light module, a light combining part and a relay module. One of the first shaping unit and the second shaping unit is selectively located on a light path where the first exciting light is located so as to generate second exciting light. The fluorescent module is arranged on the light path where the second exciting light is located to generate specified fluorescent light, and the light combining piece is movably arranged on the light path where the specified fluorescent light is located. When the first shaping unit is located on the light path where the first exciting light is located, the light combining part is located on the light path where the specified fluorescence is located and used for combining the specified fluorescence and the supplementary light generated by the supplementary light module. The wavelength interval where the supplementary light is located does not coincide with the wavelength interval where the specified fluorescence is located, so that the problem that the spectrum of the specified fluorescence is narrow can be solved by adding the supplementary light, the overall spectrum of the specified light becomes continuous and smooth, and the color rendering index of the light source device is increased.

The invention discloses a golden LED light source module, a light distribution method thereof and a golden LED lamp, and the light distribution method comprises the steps: testing the parameters of a yellow LED chip and a red LED chip under the current density of 1A / cm < 2 >-10A / cm < 2 >, and building an LED light source database; the target luminous flux phi and the current density J of the golden LED light source module are determined; selecting a yellow light LED chip and a red light LED chip from the light source database, and calculating the total luminous flux phi 1 of the selected yellow light LED chip and the total luminous flux phi 2 of the selected red light LED chip meeting the requirements of the golden light color temperature and the color rendering index under the current density J according to the target luminous flux of the golden light LED light source module; calculating the required particle number N of the yellow light LED chip and the required particle number M of the red light LED chip according to the phi 1, the phi 2, the spectrum and the luminous flux parameters of the selected yellow light LED chip and the red light LED chip; and synthesizing the yellow light LED chip and the red light LED chip into golden light lamp beads, and combining the golden light lamp beads to obtain the golden light LED light source module.

This invention discloses an LED spectral distribution optimization design method and an LED light source. The design method includes the following steps: S1, establishing a basis function library based on the Gaussian emission spectral function of phosphor materials; S2, defining the full spectral distribution function and optimization variables of the phosphor mixture; S3, constructing a comprehensive evaluation function and constraints based on color temperature, spectral efficacy, and color rendering index; S4, applying simulated annealing algorithm for optimization, aiming to minimize the comprehensive evaluation function, and globally optimizing the basis function weight vector w; S5, adjusting the comprehensive evaluation function and constraints and iteratively optimizing. This design method is applicable to the spectral control of white LEDs excited by multi-color phosphors, and can achieve synergistic optimization of color rendering index, color temperature accuracy, and luminous efficacy over a wide color temperature range, significantly improving the overall light quality and design efficiency of the LED light source.

The invention relates to the technical field of lighting lamps, in particular to a light generation method giving consideration to both color rendering and luminous efficiency, a light source comprises a high-efficiency LED and a high-color rendering LED, and the method comprises the following steps: acquiring a light source irradiation mode of the current light source; respectively matching a first illumination parameter of the high-efficiency LED and a second illumination parameter of the high-color-rendering LED according to the light source irradiation mode; first projection light projected by the high-efficiency LED is adjusted according to the first illumination parameter, second projection light projected by the high-color-rendering LED is adjusted according to the second illumination parameter, the first projection light and the second projection light are projected at the same time and form mixed light, and the CRI value and the luminous flux of the mixed light both meet the set requirements of the light source irradiation mode. The high-color-rendering LED can be matched with the high-efficiency LED with the power consumption originally small enough without full-power operation, light with the CRI value high enough is achieved in a light mixing mode, and therefore the problem that the power consumption is too large due to full-power operation of the high-color-rendering LED is solved, and the endurance of the whole light source is prolonged.

This utility model relates to the field of lighting display technology, and more particularly to a stage lighting system. The stage lighting system includes: a stage light and a driving structure; the stage light includes a light source, a reflector, a color temperature mixing component, and an imaging component; the driving structure is mechanically connected to the color temperature mixing component; the reflector, color temperature mixing component, and imaging component are arranged sequentially along the light path transmission direction of the light source; the color temperature mixing component includes a first filter, a second filter, a third filter, and a color temperature adjustment filter, which are arranged in a staggered manner along the light path transmission direction; two filter halves of each filter are arranged opposite each other on both sides of the light path transmission direction; two color temperature adjustment halves of the color temperature adjustment filter are also arranged opposite each other on both sides of the light path transmission direction. This utility model's technical solution can achieve a color rendering index (CRI) of over 70 for stage lights under low color temperature and low brightness conditions.

This invention belongs to the field of luminescent materials technology, specifically disclosing a metal halide luminescent material, its preparation method, and its application. It involves reacting cuprous halide and tetraethylammonium halide to synthesize crystals emitting blue, white, and yellow light, thus completing the (TEA)₂Cu₂X luminescent material. y The preparation of the crystal enabled tunable emission spectra within the visible light region, resulting in a single-component white light emission crystal (TEA)2Cu2Br2Cl2 with excellent color rendering index and ultra-wideband emission. This single-component white light crystal exhibits ultra-wideband emission characteristics, with a full width at half maximum (FWHM) of 300 nm and CIE coordinates of (0.32, 0.32), very close to the CIE coordinates of pure white light (0.33, 0.33). These characteristics make it an ideal choice for natural white LED applications, and when fabricated into white light emission devices, it achieves a color rendering index as high as 95. Furthermore, it contains no rare earth elements, making it an environmentally friendly material. Its preparation process is simple and low-cost, enabling large-scale industrial production.

The lighting device includes a respective plurality of first and second light emitting diodes (M-LEDs, N-LEDs) arranged on a carrier. Each M-LED comprises a die having a first surface region SA1, the first surface region SA1 having a maximum spatial range SE1 of at most 100 microns. The N-LEDs are arranged on the carrier, each N-LED comprising a die having a second surface region SA2, the second surface region SA2 having a maximum spatial range SE2 of at most 300 microns. The M-LED emits a first light LG1 having a first emission peak wavelength in ultraviolet light, violet light, and / or blue light. The N-LED emits second light LG2 having a second emission peak wavelength in green light and / or red light. The ratio defined by SA2 / SA1 is equal to or greater than 10. The device light is white light having a correlated color temperature (CCT) in the range of 2000-6500 K and a color rendering index of at least 80.