23results about How to "High color rendering index" patented technology

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 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 discloses a white light emitting layer material and a white light organic electroluminescent device, and belongs to the technical field of organic electroluminescent devices. The white light emitting layer material is composed of a red light emitting layer, a green light emitting layer and a blue light emitting layer in sequence or composed of a yellow light emitting layer and a blue light emitting layer in sequence. The red light-emitting layer is composed of a TADF host material and a red phosphorescent light-emitting material; the green light-emitting layer is composed of a TADF host material and a green phosphorescent light-emitting material; the blue light-emitting layer is composed of a host material containing phosphorus-oxygen double bonds and a blue TADF light-emitting material; the yellow light-emitting layer is composed of a TADF host material and a yellow phosphorescent light-emitting material. The white light emitting layer material has spectrum coverage with the emission wavelength of 400-780 nm, and when the white light emitting layer material is applied to a white light organic electroluminescent device, the device has the advantages of low turn-on voltage, low color temperature, low efficiency roll-off, high efficiency, high color rendering index and excellent color stability.

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.

The present invention discloses a high color rendering index PoCs phosphor and a preparation method and application thereof. The phosphor is composed of Y3Al5O 12 The YAG (YAG) matrix fluorescent ceramic is the substrate, and the substrate is coated with red fluorescent powder or green fluorescent powder. The present invention coats the fluorescent ceramic substrate with fluorescent powder (such as fluorescent red powder or fluorescent green powder), thereby avoiding the problems of direct blue light and low utilization rate caused by excessively high transmittance of the fluorescent ceramic, and reflects the blue light that directly penetrates the fluorescent ceramic back to the fluorescent ceramic, and is excited again by the activated ions, thereby improving the utilization efficiency of the blue light.

The invention discloses a reflection mode fluorescence conversion white light source for communication and illumination, and belongs to the field of visible light communication and solid-state illumination. The divergence angle, the modulation bandwidth, the color rendering index, the angle color uniformity and the thermal stability of the white light source are remarkably improved, and the overall performance of a visible light communication and solid-state lighting system is enhanced. The specific implementation method comprises the following steps: 1, adjusting parameters such as fluorescence conversion material concentration and glass cavity thickness according to light source performance requirements; the cesium lead bromide and the cadmium selenide / zinc sulfide are respectively excited by 450nm laser to radiate 521nm light and 632nm light. And 2, fixing the fluorescence conversion material on the reflecting surface of the reflecting mirror so as to improve the transmitting power of the light source. Backward radiated 521nm and 632nm light and unconverted residual 450nm light are reflected by the reflecting mirror and are combined with forward radiated light to generate a white light beam. Thirdly, a radiator is assembled on the back face of the reflector, and the thermal stability of the system is improved. The method is not only suitable for the fields of visible light communication and solid-state illumination, but also provides important technical support for various related applications such as intelligent illumination and indoor wireless communication.

The embodiment of the utility model provides a light source module and a lighting device, the light source module comprises a red LED light source, a green LED light source, a blue LED light source and a cyan LED light source, the red LED light source is used for emitting red light with the dominant wavelength ranging from 610 nm to 650 nm; the green LED light source is used for emitting green light with the dominant wavelength ranging from 510 nm to 540 nm. The blue LED light source is used for emitting blue light with the dominant wavelength ranging from 440 nm to 470 nm. The blue-green LED light source is used for emitting blue-green light with the peak wavelength ranging from 490 nm to 532 nm, and the radiation intensity of the blue-green light at 480 nm and the radiation intensity of the blue-green light at 550 nm are both larger than or equal to 0.5 times of the radiation intensity of the peak wavelength of the blue-green light. Thus, the cyan LED light source not only helps to improve the utilization efficiency of light energy of the light source module, but also helps to expand the spectral range of the light source module and improve the color rendering index, thereby enhancing the authenticity and accuracy of color rendition, and helping to meet the requirement of professional fields for high color fidelity.

The invention relates to the field of organic light-emitting materials, and discloses a color conversion composition, a blue light-driven LED and a preparation method thereof, organic boron heteropolycyclic aromatic hydrocarbon organic light-emitting materials (BODIPY and BN) in the color conversion composition are utilized, the molar extinction coefficient is large, the emission spectrum half-peak width is very narrow (10-50 nm), the quantum yield is high, and the thermal stability and chemical stability are good. Compared with the prior art, the color conversion film provided by the invention has the characteristics of simple structure and diverse structure, can realize complete coverage from the whole visible light area to the near-infrared light area, and has excellent compatibility with a base material (such as binder resin), so that the color conversion film with excellent performance is formed, and green light and red light with high luminous efficiency and high color purity can be obtained when the color conversion film is applied to an LED driven by blue light, so that the color rendering index of the LED is improved.

The invention discloses a high-color-rendering-index white light device and a preparation method and application thereof, yellow YAG and wide-band red and green nitride fluorescent powder improve the color rendering index of an LED, a flexible polymer is used as a packaging material, and the high-color-rendering-index white light LED device applied to a lighting source is prepared; red fluorescent powder and green fluorescent powder are added on the basis of yellow fluorescent powder, and a white light LED device with the color rendering index of 96.9 is obtained. The color rendering index is high, meanwhile, the mass ratio of the 6901A silica gel to the 6901B silica gel is adjusted, the fluorescent powder is packaged, and the flexible fluorescent powder composite light-emitting film with the maximum deformation displacement and the optimal fracture stress is obtained and used for device preparation. The color rendering index of the device can be effectively improved, and the adopted packaging film can still show excellent mechanical properties when subjected to stretching and cyclic physical deformation. Wide application prospects are realized in the fields of high-performance white light LED lighting devices, wearable equipment and flexible display.

The present invention relates to a spectral dimming packaging structure containing a violet or near-ultraviolet chip, and also to a manufacturing method of the packaging structure, which is characterized by comprising a first wavelength blue light chip, a second wavelength blue light chip, a violet or near-ultraviolet chip and a packaging layer, a long wavelength phosphor glue layer is arranged on the surface of the first wavelength blue light chip to form a long wavelength package, a short wavelength phosphor glue layer is arranged on the surface of the violet or near-ultraviolet chip to form a short wavelength package, and the packaging layer is used to encapsulate each short wavelength package, the second wavelength blue light chip and the long wavelength package as a whole. The advantages of the present invention are: using multiple chips with different wavelengths for excitation can take into account the excitation wavelengths of different phosphors, and can avoid the short wavelength fluorescence generated by the short wavelength phosphor from exciting the long wavelength phosphor again and being reabsorbed; the optimal excitation wavelength achieves the highest quantum efficiency and improves the light efficiency of the light source at the same time.

This invention discloses a fluorophosphate-based red fluorescent material, its preparation method, and its application. The fluorophosphate-based red fluorescent material has the chemical composition shown in formula (1): K 2+2x Ca 1‑y‑ x Eu y PO4F(1), where 2+2x represents the mole fraction of K, y represents the mole fraction of Eu, 1-y-x represents the mole fraction of Ca, 0≤x≤0.2, 0.005≤y≤0.02. This fluorophosphate-based red fluorescent material emits red fluorescence with a strongest emission peak at a wavelength of 660nm when excited by light in the 300–470nm wavelength range.

The light-emitting device provided by the present invention includes a first light source, a second light source, a dichroic mirror, a wavelength conversion device, a first optical path adjustment device or a second optical path adjustment device, and a first scattering optical system. In the present invention, the light mixing effect of the emitted light can be improved by using the first scattering optical system. The color temperature of the emitted light of the light-emitting device can be freely adjusted by adjusting the power of the first light source and the second light source separately. A laser that can emit light of different main wavelengths can also be used in the second light source to improve the color rendering index of the emitted light of the light-emitting device. The light emitted by the first light source in the present invention is all used to excite the wavelength conversion device. Compared with the prior art solution, the light-emitting device provided in the present invention can achieve a higher luminous flux output without increasing the optical extension. If a polarization selection element is used in the first light source, the luminous flux output of the light-emitting device can be further improved.

The utility model discloses a lighting device, which comprises a light source assembly, a main light source assembly and an auxiliary light source assembly, and is characterized in that the main light source assembly is used for generating main light; the auxiliary light source assembly is used for generating auxiliary light and comprises a second auxiliary light source assembly, and the auxiliary light emitted by the second auxiliary light source assembly is used for compensating the main light; the light condensing assembly is arranged on an emergent light path of the light source assembly and used for condensing the main light and the auxiliary light to obtain projection light; auxiliary light emitted by the second auxiliary light source assembly at least comprises a first peak wavelength and a second peak wavelength, the first peak wavelength is larger than 580 nm, and the second peak wavelength is smaller than 550 nm; the Duv color deviation of the auxiliary light emitted by the second auxiliary light source assembly on a chromaticity diagram is smaller than or equal to 0.02. In this way, the color cast phenomenon and the color temperature change can be improved, and the color rendering index can be adjusted.

The present invention relates to a high-rendering index and high-light-efficiency package, comprising a support member, on which a first LED chip and a second LED chip are arranged; a red phosphor colloid layer is arranged on at least the top surface of the surface of the second LED chip to form a package A; a short-wavelength phosphor colloid layer that does not contain red phosphor is arranged outside the first LED chip and the package A to form an overall package. The advantages of the present invention are that the high-rendering index and high-light-efficiency package of the present invention can take into account the excitation wavelengths of different phosphors by using multiple chips with different wavelengths for excitation.

The application belongs to the technical field of RGB mixed light, and provides a light emitting device, a light mixing method, a light mixing device, a terminal device and a storage medium. B = 0.1474 ± 0.100, y B = 0.0330 ± 0.100; a green light source with a peak wavelength of 536nm ± 10nm and a half wave width greater than 100nm, color coordinates on a CIExyY chromaticity diagram are x G = 0.3899 ± 0.100, y G = 0.5381 ± 0.100; and a red light source with a peak wavelength of 630nm ± 10nm and a half wave width greater than 75nm, color coordinates on a CIExyY chromaticity diagram are x R = 0.6358 ± 0.100, y R = 0.3192 ± 0.100. The light emitting device provided by the application has high color rendering index and light efficiency of mixed white light.

The application provides a full-spectrum complex-phase fluorescent ceramic and a preparation method and application thereof. 1‑x‑y Sr y AlSiN3:xEu (0 1‑x‑a‑b Y a Gd b )3(Al 1‑c Ga c )5O 12 :xCe (0 12 The short-time ceramic sintering and the faster temperature rising and falling rate in the application effectively slow down the grain growth in the ceramic sintering process, and in the short-time sintering process, the nitride powder forms the oxide phase in situ without causing large decomposition or sintering so as to make it invalid. In short, through the short-time high-temperature pulse sintering, the sintering densification of the complex-phase ceramic is promoted, and the nitride phase is avoided from being oxidized in the long-time high-temperature process to cause the sharp drop of the luminous efficiency.

This application provides an LED lamp bead and an LED light source, belonging to the field of LED technology. It includes: a substrate; at least one blue LED chip located on the substrate; and a phosphor layer located on the substrate and the blue LED chip. The phosphor layer contains a first nitride red phosphor, a second nitride red phosphor, a fluoride red phosphor, a green phosphor, and a yellow-green phosphor. The peak wavelength of the fluoride red phosphor is greater than the peak wavelength of the first nitride red phosphor and less than the peak wavelength of the second nitride red phosphor. This allows the LED lamp bead to achieve both a high color rendering index and good luminous efficiency.

The invention discloses a fluorescent glass film as well as a preparation method and application thereof. The fluorescent glass film comprises a glass substrate and a fluorescent film coated on the glass substrate, the fluorescent film comprises fluorescent powder and glass powder, and the fluorescent powder is formed by mixing cyan emitting fluorescent powder and red emitting fluorescent powder according to the weight ratio of (5-20): 1; the chemical composition of the cyan emitting fluorescent powder is Ba < 1.93 > Mg < 1-x > CaxSi2O7: 0.07 Eu < 2 + >, x is the molar coefficient of Ca, and x is more than or equal to 0.1 and less than or equal to 0.9; the chemical composition of the red emitting fluorescent powder is (Ca, Sr) AlSiN3: Eu < 2 + >. The fluorescent glass film can generate warm white light with high color rendering index and low color temperature under excitation of purple light; and meanwhile, better light quality can be obtained.

The invention relates to the technical field of illumination, in particular to a composite luminescent material, a luminous body and a lamp. The composite luminescent material comprises a white light material and a near-infrared fluorescent material, wherein the color temperature of white light emitted by the white light material is 2400-3000 K; after the normalization processing, the emission spectrogram of the white light material and the excitation spectrogram of the near-infrared fluorescent material at least partially coincide with each other under the curve area, and the ratio of the coincide area to the excitation spectrogram under the curve area is greater than or equal to 70%. The white light material can excite the near-infrared fluorescent material to emit near-infrared light, so that the composite luminescent material can emit white visible light and near-infrared light, and illumination and human health promotion are both considered. The area of the overlapping area is large, the excitation effect of white light on the near-infrared fluorescent material is improved, and the energy conversion efficiency is improved. The color temperature of the white light is beneficial to reducing color temperature shift, so that visible light finally emitted by the composite luminescent material is warm white light, and the composite luminescent material is suitable for bedroom illumination and other scenes.

The white light LED light source with good color rendering effect has the advantages that the red light emitted by the red fluorescent powder can increase the red light component in the white light, effectively improves the color rendering index (CRI) and special color rendering index (R9) of the white light, and the light source has good color rendering effect. Since the red fluorescent powder surrounds the yellow fluorescent powder, the red fluorescent powder can absorb the excessive blue light escaping from the yellow fluorescent powder area, and the red light emitted by the red fluorescent powder and radiating outward from the peripheral side will not be absorbed by the yellow fluorescent powder, so that the effective output of the red light can be ensured.

The invention discloses a preparation method of surface plasmon enhanced Mn < 4 + > doped double perovskite fluorescent powder, which comprises the following steps: S1, selecting specific A, B 'and B' 'source compounds, mixing according to a stoichiometric ratio, adding zirconium oxide balls into a ball milling tank, carrying out planetary ball milling for 3-8 hours, putting into an alumina crucible, sintering at 900-1300 DEG C for 6-15 hours to obtain a substrate, cooling, carrying out particle size treatment, and carrying out XRD detection; s2, selecting a Mn < 4 + >-containing compound according to the concentration of 0.1-5 mol%, and carrying out ball milling on the Mn < 4 + >-containing compound and And S3, carrying out metal nanometer treatment on a metal salt solution and the material obtained in the previous step. The luminous efficiency of the fluorescent powder is remarkably improved, the intensity can be improved by 30%-50% compared with that of traditional fluorescent powder, color regulation and control are accurate, multicolor fluorescence emission can be achieved, the color saturation and luminous efficiency can be improved when the fluorescent powder is applied to a display technology, the color rendering index and luminous efficiency can be improved when the fluorescent powder is used for illumination, and the anti-counterfeiting effect in the anti-counterfeiting field is enhanced; the chemical stability is good, the preparation is easy to control, and industrial production and multi-field application expansion are facilitated.

The utility model provides a light source device and a lamp, the light source device comprises a support and a plurality of light-emitting chips, and the support is provided with a first electrode and a second electrode; the plurality of light-emitting chips are arranged on the bracket, the plurality of light-emitting chips comprise a plurality of blue light chips and at least one purple light chip, the plurality of blue light chips are used for exciting a plurality of blue light with different peak wavelengths, and the plurality of purple light chips are used for exciting blue light with different peak wavelengths from the plurality of blue light; wherein the plurality of light-emitting chips are respectively arranged on the first electrode and the second electrode, at least one of the plurality of light-emitting chips is arranged on the first electrode, and at least one of the plurality of light-emitting chips is arranged on the second electrode; on one hand, the purple light part of the spectrum is compensated through the purple light chip, the spectrum continuity can be enhanced, and the color rendering index and the saturated blue index can be improved; and on the other hand, blue light with different peak wavelengths is excited in a segmented manner through the plurality of blue light chips, so that the energy peak value of the blue light can be dispersed, and the blue light harm can be reduced.

This utility model relates to a dual-light source heat dissipation vanity light structure, belonging to the field of lighting fixture technology. The vanity light includes a mounting box, a heat sink, and two optical components. The mounting box has a frame structure with an integrated groove on the back. The heat sink is located on the front of the mounting box, with slots on both sides. The two optical components are respectively located on the upper and lower sides of the heat sink. Each optical component includes an aluminum substrate, an LED light source, and a light-transmitting cover. The aluminum substrate is fixedly connected to the heat sink, and the light-transmitting cover is snapped into the slot. A mounting plate with mounting holes is centrally located in the groove on the back of the mounting box, and a driver and switch assembly are integrated at the bottom of the groove. This utility model achieves uniform and soft vanity lighting through a dual-light source side-mounted layout, significantly improves heat dissipation efficiency through the direct connection between the centrally located heat sink and the aluminum substrate, and achieves a compact structure, stable installation, and convenient maintenance through modular electrical integration on the back, making it particularly suitable for high-humidity environments such as bathrooms.