83results about How to "Improve color temperature" patented technology

Solid state modules and fixtures comprising different combinations and arrangements of a light source, one or more wavelength conversion materials, thermally conductive connection adapters allowing dissipation of heat outside of the module, and a remote power supply unit. This arrangement allows for greater thermal efficiency and reliability while employing solid state lighting and providing emission patterns that are equivalent with ENERGY STAR® standards. Some embodiments additionally place compensation circuits, previously included with power supply units, on the optical element itself, remote from the power supply unit. Various embodiments of the invention may be used to address many of the difficulties associated with utilizing efficient solid state light sources such as LEDs in the fabrication of lamps or bulbs suitable for direct replacement of traditional incandescent bulbs or fixtures using bulbs.

The invention relates to an illumination system, a luminaire and a display-device (200) comprising the illumination system. The illumination system (100, 101) comprises a light emitting diode (D1, D2), a light exit window (105) and a luminescent layer (120) arranged between the light emitting diode and the light exit window. The light emitting diode emits light of a first primary color (72, 75). The luminescent layer is arranged between the light emitting diode and the light exit window for converting part of the light emitted by the light emitting diode into light of a second primary color. The luminescent layer comprises a garnet luminescent material comprising at least Lutetium, Cerium, Silicon and Nitrogen (73), or it comprises a combination of a garnet luminescent material comprising at least Lutetium and Cerium (70) and a garnet luminescent material comprising at least Cerium and at least one element of the group comprising Yttrium and Gadolinium (71, 74). The light exit window emits light generated by the illumination system towards the display device.

An LED lighting unit and a method for manufacturing the same can include a first cavity and a second cavity which has a depth that is different from that of the first cavity. The first and the second cavities can include an LED chip and an encapsulating resin including a phosphor. Color temperatures of light emitted from these cavities can be controlled by changing thicknesses of the encapsulating resin based on the depth of each of these cavities so as to be located on a substantially black body, and the variability of the optical characteristics can be reduced due to the simple structure. Thus, the LED lighting unit can emit light having a favorable color temperature that is close to a natural light using light that is emitted from these cavities. The manufacturing method can include forming the thickness of the encapsulating resin with accuracy, and therefore can provide a suitable LED lighting unit for various lighting systems.

An OLED device having two spaced electrodes including: first, second, and third light-emitting units disposed between the electrodes, the first light-emitting unit produces light that has multiple peaks at wavelengths longer than 500 nm and substantially no emission at wavelengths shorter than 480 nm, and the second and third light-emitting units produce light that has substantial emission at wavelengths shorter than 500 nm; intermediate connectors respectively disposed between the first and second light-emitting units, and between the second and third light-emitting units; and wherein the OLED device emits light with a color temperature greater than 7,000K.

The invention discloses a method for preparing mononuclear AgInS2 quantum dots, comprising the following steps of: (1) adding AgNO3, InCl3, oleic acid, dodecyl mercaptan and solvent octadecene in a reaction container, to obtain an Ag and In precursor mixed liquor; (2) adding sulfur powder into oleylamine, and heating until the sulfur powder is fully dissolved, to obtain an S precursor solution; (3) under protection of argon, heating the Ag and In precursor mixed liquor from room temperature to 50-80 DEG C, and maintaining for 10-60min, in order to discharging air; and then raising temperature to 100-120 DEG C, maintaining for 1-5min, and injecting the S solution, wherein a mol ratio of Ag to S is 1:2, and reaction time is 5-90min; (4) sampling, and dissolving a sample into hexane, to obtain a AgInS2 quantum dot solution; and (5) adding waterless ethanol into the AgInS2 quantum dot solution obtained in the step (4), and centrifugally separating to obtain the mononuclear AgInS2 quantum dots. The method of the invention further raises fluorescent quantum yield of the mononuclear AgInS2 quantum dots prepared by a thermal injection method, in order to reach practical application requirement.

The present invention relates to a double-layer YAG:Ce / (Gd,Y)AG:Ce composite transparent ceramic phosphor for white light LED packaging, and a preparation method thereof. The composite transparent ceramic phosphor comprises two laminated transparent ceramic layers, wherein the chemical composition of the first transparent ceramic layer is (CexY1-x)3Al5O12, x is more than or equal to 0.0005 and is less than or equal to 0.05, the chemical composition of the second transparent ceramic layer is (CeyGdzY1-y-z)3Al5O12, y is more than or equal to 0.0005 and is less than or equal to 0.05, and z is more than or equal to 0.25 and is less than or equal to 0.75. According to the present invention, under the excitation of the blue light emitted by the LED chip and having the wavelength of about 465 nm, the cerium-yttrium-aluminum-doped garnet (YAG:Ce) transparent ceramic can emit the wide spectrum yellow light with the peak value of 530 nm, and the cerium-gadolinium-yttrium-aluminum-doped garnet ((Gd,Y)AG:Ce) transparent ceramic can emit the red yellow light with the wavelength of close to 580 nm, such that the white light spectrum with the sufficient red light component can be obtained through the compounding so as to effectively improve the LED luminescence color temperature while obtain the high luminous efficiency.

A voltage monitor and LED color controller circuit detects wall light dimmer and wall light switch on / off status based upon the output of an LED driver located downstream from the wall light dimmer and switch. Various switch time delays will produce several different outputs from an LED array, enabling wall dimmer switch control of intensity and Correlated Color Temperature (CCT). In addition, a preferred embodiment will first turn on in a default mode with a spectrum that is substantially devoid of violet wavelengths and provides only nominal amounts of blue light, to avoid undesirable disruption of circadian rhythm. In other embodiments, various controls may be provided that permit custom light therapy for various purpose and benefit.

A wavelength adjustable high-brightness fluorescent powder for white LED has a chemical formula: Y3-xAl5O12:xCe3+, where x=0.01-0.05. It is prepared from aluminium oxide, yttrium oxide, cerium oxide and flux through proportionally mixing, grinding, loading the mixture in calcining container, putting the container in furnace and the carbon rod outside the container, heating to 900 deg.C, holding the temp for 30 min, heating to 1550 deg.C, for calcining it and cooling. Its advantages are high light intensity and high dispersity in transparent gel.

The invention discloses a control method used for controlling a camera system to take a picture. The camera system comprises an electronic device and a selfie stick, wherein the electronic device is used for taking the picture on the selfie stick; the selfie stick comprises a plurality of flashlights with different color temperatures; and the control method controls a selfie system to open the flashlight corresponding to the color temperature of a scene and take the picture to obtain a light filling image. According to the control method in the embodiments of the invention, the color temperature of the image is matched with the color temperature of the scene, so that the image quality can be improved. In addition, the invention also discloses a control device and the camera system.

The invention discloses near-ultraviolet-excited white-light LED (light-emitting diode) fluorescent powder and a preparation method thereof, and relates to the field of rear-earth-doped light-emitting materials and solid illumination. The fluorescent powder material takes molybdate / tungstate as a substrate, and has a chemical formula of AR2(WO4)4-x(MoO4)x:Eu<2+>, Mn<2+>, wherein A is one or a combination of more of Mg, Ca, Sr, Ba, Cu and Zn; R is one or a combination of more of Al, Sc, La, Gd, Y, Bi and the like; x ranges from 0 to 4. The fluorescent powder disclosed by the invention is stable in physical and chemical properties while being excited by near ultraviolet, and excellent in luminescence property at a high temperature, and the substrate of the material can absorb near-ultraviolet photons which are transmitted to Eu<2+> and Mn<2+> ions through energy, so that fluorescent emission excitement of the Eu<2+> and Mn<2+> ions within a range of 420 nm to 650 nm can be realized. The fluorescent powder material has the advantages of high absorption efficiency, stable performance, high light-emitting efficiency, adjustable color and the like in a near-ultraviolet region, and the preparation process is simple.

A plasma display panel includes an upper plate having a sustain electrode, a lower plate having an address electrode, and a partition formed between the upper plate and the lower plate and having an inorganic ion exchanger. The yellow discoloration of the partition is prevented to improve color brightness and light permeability.

The invention discloses a preparation method of Eu<3+> doped molybdate red fluorescent powder used for a white light LED (Light Emitting Diode). A chemical formula of the red fluorescent powder is Sr2CaMoO6:xEu<3+>, wherein x is greater than or equal to 0.01 and less than or equal to 0.15. Raw materials are weighed according to a stoichiometric ratio, the raw materials and a fluxing agent are fully and evenly mixed, and a mixture is added into double crucibles made of corundum, wave absorbent is arranged between the double crucibles, the double crucibles are loaded into a microvan, temperature is quickly raised to 750 to 950DEG C, the mixture is sintered in an oxidation environment, and heat preservation time is 0.5 to 4h; finally, cooling, grinding, washing and drying are carried out to obtain the red fluorescent powder used for the white light LED. During microvan sintering, the fluxing agent is added to accelerate the formation and growth of molybdate polycrystal, the sintering degree of the fluorescent powder is obviously lowered, sintering time is obviously shortened, a powder body is loose and does not need to be mechanically smashed, in addition, the shapes of aluminate fluorescent powder particles are effectively controlled, and the particles with a small particle diameter and even distribution are obtained, wherein the appearance of the particles is similar to a sphere.

The invention discloses a multi-angle rotary portable vidicon for network security and protection. The multi-angle rotary portable vidicon comprises a camera and a connecting rod, the camera is installed on the vidicon, a guide rail is arranged on the camera, a slide block is installed on the guide rail, a controller is installed on the slide block, the connecting rod is installed on the guide rail through the slide block, a hair brush is arranged on the connecting rod, an alarm is installed at the top of the vidicon, an infrared distance measuring sensor is installed on one side of the vidicon, a data line interface is formed in the vidicon, a USB interface is formed in one side of the data line interface, a power supply interface is formed in the other side of the data line interface, a heat dissipation window is formed in one side of the power supply interface, a cold light lamp is arranged at the bottom of the vidicon, the vidicon is installed on a servo motor by a supporting rod, and the servo motor is installed on the base. The vidicon is simple and convenient to install, and has the advantages of wide monitoring range and reliable security performance.

A day / night switchable light adjusting device and light adjusting method thereof are provided. The day / night switchable light adjusting device is composed of a plurality of panels; each panel includes a reflecting surface and at least one lighting unit. Each lighting unit can emit various wavelength region lights, and the various wavelength lights are mixed on a light collecting component. A control unit is provided for adjusting the various wavelength region lights corresponding to day / night variation. A light intensity of a cyan region light or a blue region light is reduced for preventing an over-inhibition on a quantity of Melatonin.

A YAG transparent ceramic for white light LED lamps. Sintering raw materials comprise, by weight, 220-300 parts of Al2O3, 300-380 parts of Y2O3, 60-75 parts of SiO2, 15-20 parts of CeO2, 5-10 parts of Pr2O3, 2-5 parts of Eu2O3, 2-4 parts of Lu2O3, 1-2 parts of LiF, 3-5 parts of B2O3, 3-5 parts of SiC, and 0.5-1 part of CaO. The purity of all the raw materials is above 99.99 wt%. The transparent ceramic has a light transmittance in the visible light region of up to 65%-75%, and has a color temperature of 4000-5000 k. Compared with the prior art, the transparent ceramic is improved in aspects of shrinkage percentage, light transmittance, color rendering index, and color temperature, and has the characteristics of high thermal conductivity, good chemical stability, long service life, and high luminous efficiency.

A wavelength conversion member which can achieve high color purity and optimize color temperature according to environmental changes, a light source assembly including the wavelength conversion member, and a liquid crystal display (LCD) including the light source assembly. The light source assembly includes a light-emitting chip which generates light and a wavelength conversion member which includes wavelength conversion particles that convert the light into light having a predetermined wavelength, the predetermined wavelength being determined according to the size of the wavelength conversion particles.

A plasma display panel for improving a color coordinates correction and a color temperature is disclosed. In the plasma display panel, a vertical barrier rib separates red, green and blue discharge cells from each other in a longitudinal direction. A horizontal barrier rib is provided between the vertical barrier ribs to separate the red, green and blue discharge cells from each other in a wide direction. The horizontal barrier rib has a first horizontal barrier rib provided between the red discharge cells, a second horizontal barrier rib provided between the green discharge cells, and a third horizontal barrier rib provided between the blue discharge cells and having a smaller width than the first and second horizontal barrier ribs.

The invention discloses an HID (high intensity discharge) high-efficiency street lamp reflecting mirror, which comprises a shell, wherein the shell is further internally provided with a reflecting mirror, and the shell and the reflecting mirror are in parabola curve shape. The included angel between the axis of the shell and the axis of the reflecting mirror is 2-10 degrees, a shell fixing bulge is arranged on one end of the shell, a shell fixing wing is arranged on the other end of the shell, the inner wall of the reflecting mirror is further provided with a plurality of reflecting units which are in parabola curve shape, the plurality of reflecting units are connected with each other to be in a wave shape, the reflecting units are used for ensuring that the inner wall of the reflecting mirror is in a multiple free-form surface shape, the focal position of the reflecting mirror is further provided with a reflecting board, a plurality of cambered surfaces are arranged on the reflecting board, and a lamp-socket is arranged in the middle of the reflecting board. The invention has the advantages of simple structure and convenient use, and can ensure that the HID lighting effect is fully utilized and the road is brighter, safer and more uniform and has no dead zone of illumination.

The invention discloses fluorescent tube manufacturing method. It includes dusting, baking tube, sealing, exhausting, burned tip, and tact working procedure. Its feature is that the top of the fluorescent tube is connected with glass tube while dusting; the fluorescent powder slurry is absorbed from one nozzle; another one is sealed but desterilized after finishing absorbing; the fluorescent powder slurry will flow out by self gravity and atmospheric pressure; the glass tube burned tip will form cold end after exhausting. The invention has the advantages of compact structure, high light effect, and better color temperature.

The invention relates to a rare-earth metal halide prescription used in a metal halide lamp, in particular to a metal iodide prescription used in the metal halide lamp which is used on occasions withlarge illumination area, such as stadium, storehouse, factory, fishing operation occasion and the like requiring large power, high color rendition and high color temperature. An electric arc tube of alamp is filled with iodide with the components and weight percentages as follows: 50 percent to 55 percent of DyI3, 18 percent to 20 percent of NaI18, 8 percent to 10 percent of GdI3, 13 percent to 15 percent of CsI, 1 percent to 2 percent of TlI and 3 percent to 5 percent of InI. The iodide prescription of the metal halide lamp improves the color rendition index and the color temperature greatly; the high correlative color temperature CCT is more than or equal to 7000K; the high color rendition index Ra is more than or equal to 85; the high illumination efficiency eta is more than or equal to 70Lm / W; and the longer service life L is more than or equal to 4000H. The metal halide lamp has high lighting effect and pure white light, is more comfortable to people and is fit for illuminating on the occasion with high illumination quality requirements and larger area.

An LED COB quartz lamp comprises a light-transmitting lampshade, a light-reflecting cup, an LED COB chip, a heat radiator, a power supply module and a lamp cup. The heat radiator is arranged outside the upper end of the power supply module in a sleeved mode, the LED COB chip is pasted on the heat radiator, and the heat radiator and the power supply module are accommodated in the lamp cup, and the light-reflecting cup is installed at the top end of the lamp cup, and the light-transmitting lampshade is buckled on a light outlet of the light-reflecting cup. The LED COB quartz lamp is good in heat radiation effect and light condensation effect, soft in emergent light and good in emergent light color temperature. The invention further relates to a manufacture method of the LED COB quartz lamp.

The invention discloses white-light fluorescent powder taking borate as a single substrate and a preparation method for the white-light fluorescent powder. A general chemical formula of the white-light fluorescent powder is as follows: Na3Gd2-x(BO3)3:x:Dy<3+>, wherein x is greater than or equal to 0.01 but smaller than or equal to 0.15. Fluorescent powder is prepared by adopting a solid phase method, the process is simple, the calcination temperature is low, the preparation period is short and pollution on environment is avoided. The fluorescent powder is stable in performance, and white light emitted under near-ultraviolet excitation is high, and is close to ideal white light. And therefore, the white-light fluorescent powder has good application potential on LED (light-emitting diode) illumination development and industrial production.

This invention provides a road fluorescent lamp. A problem existing in traditional high-pressure sodium lamp is that the maximum light energy output concentrates at 580 nm which has low effective light flux and low exciting value to man's eye at neso-vision belonging to yellow light zone. This invented lamp includes a lamp characterizing in that the wavelength main peek value of fluorescence powder coated on the lamp is 516+ / -10nm and sub-peak values are 480+ / -10nm, 450+ / -10nm and 611+ / -10nm, the distribution of which comforms to the meso-vision spectrum sensitivity between bright and dark visions of man's eye.

The organic white light fluorescent material consists of conjugate compound and linear low-density polyethylene in the ratio of 1 to 1000-100000, which are heated to 170-200 deg.c, smelted and cooled. The conjugate compound may be riboflavine, Nuodanming, vat violet, vat yellow, vat orange and vat deep blue or their mixture. When the organic fluorescent material of the present invention is prepared into film and packed into blue core or green core LED, white light may be produced. Via altering the material composition, different strength ratio between the yellow-green light and the red light may be obtained, and this can improve the color temperature and color mark of white light LED to obtain ideal white light.

The invention discloses high-color-rendering composite fluorescent glass and a preparation method thereof. The high-color-rendering composite fluorescent glass comprises a PiG layer and a red fluorescent powder layer. The preparation method of the high-color-rendering composite fluorescent glass comprises the following steps: weighing a certain amount of raw materials according to a low-melting-point glass formula, uniformly mixing, putting into a crucible, melting for 0.1-4 hours, carrying out water quenching on the molten glass liquid, drying, grinding and sieving to obtain matrix glass powder; the preparation method comprises the following steps: mixing matrix glass powder and commercial green or yellow fluorescent powder according to a required mass ratio, putting the mixture into a crucible, melting for 0.1-4 hours, pouring a melt into a mold which is heated to a certain temperature, paving a layer of red fluorescent powder in the mold in advance, quickly covering the mold after the melt in the crucible completely flows into the mold, continuously keeping the temperature for 0.1-1 hour, and cooling to room temperature, thereby obtaining the red fluorescent powder. And naturally cooling to room temperature, and carrying out annealing treatment to obtain the composite fluorescent glass material. The preparation method provided by the invention is suitable for compounding matrix glass of different systems and various fluorescent powders, and is wide in application field and easy for large-scale production.

The invention discloses a praseodymium doped borate red luminescent material and a preparation method and applications thereof. The chemical formula of the luminescent material is ARB7O13:Pr3+; wherein A represents one or more of Mg, Ca, Sr, Ba, Cu, and Zn, and R represents one or more of Al, Sc, La, Gd, Y, and Bi. The properties and luminescent performance of the luminescent material are stable at a high temperature. The invention also discloses a preparation method of the praseodymium doped borate red luminescent material, the preparation technology is simple and is suitable for large scale industrial production, and the cost is low. The luminescent material can be applied to the fields such as white light LED illumination, display technology, and the like.

The embodiment of the invention provides an LED (Light Emitting Diode) lamp which comprises a lamp shade, a plurality of LED light sources, a first reflecting plate and a second reflecting plate, wherein the lamp shade is used for carrying out scatter diffuse on LED light radiating to the inside of the lamp shade; the LED light sources are configured into the lamp shade and are used for providing the LED light to the inside of the lamp shade; the first reflecting plate is provided with an opening, is positioned above the LED light sources and is used for reflecting part of LED light to the outlet direction of the lamp shade; and the second reflecting plate is positioned above the opening of the first reflecting plate, shields part of opening of the first reflecting plate and is used for reflecting part of the LED light entering through the opening of the first reflecting plate to the side direction of the lamp shade. According to the embodiment of the invention, the light distribution angle can be increased and the color temperature is improved.

The invention discloses a method for preparing mononuclear AgInS2 quantum dots, comprising the following steps of: (1) adding AgNO3, InCl3, oleic acid, dodecyl mercaptan and solvent octadecene in a reaction container, to obtain an Ag and In precursor mixed liquor; (2) adding sulfur powder into oleylamine, and heating until the sulfur powder is fully dissolved, to obtain an S precursor solution; (3) under protection of argon, heating the Ag and In precursor mixed liquor from room temperature to 50-80 DEG C, and maintaining for 10-60min, in order to discharging air; and then raising temperature to 100-120 DEG C, maintaining for 1-5min, and injecting the S solution, wherein a mol ratio of Ag to S is 1:2, and reaction time is 5-90min; (4) sampling, and dissolving a sample into hexane, to obtain a AgInS2 quantum dot solution; and (5) adding waterless ethanol into the AgInS2 quantum dot solution obtained in the step (4), and centrifugally separating to obtain the mononuclear AgInS2 quantum dots. The method of the invention further raises fluorescent quantum yield of the mononuclear AgInS2 quantum dots prepared by a thermal injection method, in order to reach practical application requirement.

The present invention is to provide a minimalistic LED recessed light, which includes a light cup having a bottom provided with an opening and a top provided with a light-permeable hole in communication with the opening, a light chip having a bottom surface provided with at least one LED, a heat sink having a bottom connected with the top of the light cup for positioning the light chip therebetween and allowing the LED to correspond in position to the light-permeable hole, and an elastic supporting plate fixed to a top of the heat sink and having sections respectively and symmetrically bent toward the light cup and formed with an outwardly curved engaging surface, wherein the distance between the curved engaging surfaces is greater than a diameter of a fitting hole cut in a ceiling, for effectively achieving the objects of heat dissipation and easy installation / removal of the recessed light.