60results about How to "High color rendering" patented technology

The invention relates to an LED light-emitting device with variable color temperature and an implementation method thereof. The LED light-emitting device comprises three LED banks with different colors, a controller and a temperature sensor; a first LED bank is a white LED light, a second LED bank is a yellow LED light and a third LED bank is a red LED light; each LED bank comprises at least one LED light; the temperature sensor can transfer the ambient temperature to the controller; the controller finds out the set intervals of the temperature according to the comparison results and adjusts the light intensity proportions of the three LED banks according to the voltage control parameters of the white LED light, the yellow LED light and the red LED light so as to realize automatic variation of color temperature along with the variation of the ambient temperature; the voltage control parameters correspond to the response voltage parameters of the temperature sensor; three banks of different colors are adopted, especially the red light is supplemented, thus greatly improving color rendering of the light-emitting device and ensuring the spectrum of the device to be closer to the natural light.

Disclosed is a high color rendering, high-efficiency light-emitting device capable of use in general lighting applications and which, in a state in which the average color rendering index (Ra) and the special color rendering index (R9) are maintained at high values, suppresses as much as possible reduction of the light-emission efficiency. The disclosed light-emitting device is provided with: at least one light-emitting element (6) which radiates light having a peak light-emission wavelength in the region from near-ultraviolet to blue; and a phosphor layer (5) containing green phosphors which are excited by the primary light emitted from the light-emitting element (6) and emit light having a peak emission wavelength in the green region, first red phosphors which are excited by the aforementioned primary light and emit light having a peak emission wavelength in the red region, and second red phosphors which, excited by the aforementioned primary light, emit light having a peak emission wavelength in the red region but different from that of the aforementioned first red phosphors.

The invention discloses a white light LED lamp and a method for generating white light with high color rendering. The white light LED includes a substrate with high thermal conductivity and an LED chipset arranged on the substrate with high thermal conductivity. The LED chipset includes at least two blue chips and at least one red chip , the blue light chip and the red light chip are connected with a control circuit that can adjust the size of the current output; it also includes a fluorescent lens arranged above the LED chipset, and yellow fluorescent powder and green fluorescent powder are evenly distributed in the fluorescent lens. The white light LED lamp of the present invention uses at least two blue light chips and at least one red light chip, combined with yellow phosphor and green phosphor, to form four continuous peak wavelengths to generate a white light with high color rendering, high light efficiency and adjustable color temperature LED.

The invention discloses a water-based wallpaper polystyrene foam comprising a component A and a component B, wherein the component A refers to a main body emulsion resin and the component B refers to a polystyrene foam, wherein the main body emulsion resin comprises a (methyl) acrylate monomer, a functional polymerizable monomer, an emulsifier, an initiator and de-ionized water; the component B comprises a foamer, an adhesion promoter and a wetting dispersant. Correspondingly, the invention also discloses a method for preparing the water-based wallpaper polystyrene foam and a wallpaper produced by using the water-based wallpaper polystyrene foam. According to the invention, the water-based wallpaper polystyrene foam is obviously improved in adaptability to the base material of the wallpaper, has excellent adhesive power and color developing capability, and further is resistant to scrubbing and high temperatures; the water-based wallpaper polystyrene foam also has high foaming height to form good stereoscopic impression.

The invention relates to a light-mixing-type polycrystalline packaging structure, which comprises a substrate unit, a light-emitting unit, a frame unit and a packaging unit. The first light-emitting module of the light-emitting unit is provided with a plurality of red light-emitting diode crystal grains which are arranged on the substrate unit. The second light-emitting module of the light-emitting unit is provided with a plurality of blue light-emitting diode crystal grains which are arranged on the substrate unit. The first surrounding-type frame colloids of the frame unit surround the first light-emitting module. The second surrounding-type frame colloids of the frame unit surround the second light-emitting module and the first surrounding-type frame colloids. The transparent colloids and the fluorescent colloids of the packaging unit respectively cover the first light-emitting module and the second light-emitting module. Color rendering is improved through mutual light mixing of a red light source produced after the red light-emitting diode crystal grains are matched with the transparent colloids and a white light source produced after the blue light-emitting diode crystal grains are matched with the fluorescent colloids.

A problem which the present invention addresses is to provide a semiconductor light-emitting device with which, in addition to an improved light emission efficiency, a color rendering property improvement is implemented. This semiconductor light-emitting device comprises a cut filter which absorbs short wavelength light of 430nm or less, and transmits light of wavelengths longer than 430nm. In a spectrum of light which the semiconductor light-emitting device outputs, the light emission peak intensity for a discharge light of the semiconductor light-emitting element is 50% or less of the maximum intensity of the spectrum, allowing solving the problem.

The invention discloses a color compensation LED lamp. The color compensation LED lamp comprises a power supply, a color encoder, a white light controller, a three-primary-color controller, an LED lighting tube and a data acquisition device, and is characterized in that: the data acquisition device detects the color of a tested object and outputs a signal to a color compensation processor; and the color encoder, the white light controller and the three-primary-color controller control the LED lighting tube so that the LED lamp for compensating colors in white light is obtained. The color compensation LED lamp can be used in multiple fields and can obtain various light supplement colors with high color development and high brightness through regulation and control as required.

The invention discloses red fluorescence powder with high color rendering and low light attenuation. The chemical formula of the red fluorescence powder is expressed as (Sr1-m-zMm)SinAlxNyCllFj:Euz. In the formula, M is selected from one or several of Ca, Ba, Li, Na, K and Sc; m is greater than or equal to 0.001 and is less than 1; n is greater than or equal to 0.5 and is less than or equal to 2.5; x is greater than or equal to 0.5 and is less than or equal to 2.5; y is greater than or equal to 1 and is less than or equal to 5; l is greater than or equal to 0.001 and is less than or equal to 1; j is greater than or equal to 0.001 and is less than or equal to 1; z is greater than or equal to 0.001 and is less than or equal to 0.2. The invention also discloses a preparation method of the red fluorescence powder. The method comprises the following steps: weighing the needed raw materials according to a chemical metering ratio of the chemical formula, and fully and uniformly mixing the raw materials in nitrogen protection; firing the uniformly mixed raw materials in stages with high-pressure and high-temperature solid phase in the nitrogen atmosphere; crushing and sieving to obtain powder, and carrying out film-coating treatment on the powder via a CVB method to obtain the red fluorescence powder with high color rendering and low light attenuation. The fluorescence powder has the characteristics of high light emitting efficiency, high color rendering and low light attenuation.

The invention relates to an LED, in particular to an LED with functions of adjusting the color temperature and improving the color rendering. The LED comprises a substrate, an electrical induced blue light emitting LED unit arranged on the substrate, and a packaging body with yellow fluorescent powder distributed. The LED is characterized by further comprising a first LED unit comprising at least one electrically induced red light emitting LED wafer, the electrical induced blue light emitting LED unit and the first LED unit are connected with respective drive power sources through electrodes, and the electrical induced blue light emitting LED unit and the first LED unit are packaged in the packaging body. The LED with the functions of adjusting the color temperature and improving the color rendering can overcome the defect that the color rendering performance of a common LED is poor, and can improve the color rendering performance of the LED, especially the color rendering performance and brightness when color temperature is low.

The invention provides a perovskite sheet-based light-emitting device and a preparation method thereof. The method is convenient to process and simple in preparation; and the device is assembled by growing band gap-adjustable perovskite sheets. The method comprises the steps of (1) obtaining a monocrystalline or polycrystalline perovskite crystal of a corresponding light-emitting wavelength by controlling the halogen ion doping amount; (2) slicing the obtained perovskite crystal to obtain large-area perovskite sheets of which the area is greater than 200 mm<2> and the thickness is smaller than 1 mm; and (3) taking the large-area perovskite sheets as active layers of the light-emitting device to obtain the light-emitting device. On the basis of preparation of the large-sized color-adjustable monocrystal or polycrystal perovskite crystal, the perovskite sheets are prepared by employing a crystal cutting process; and perfect cutting of the crystal can be achieved by controlling the roughness and the movement speed of a cutting line in the cutting process. By the cutting process of the perovskite crystal, production of a high-quality perovskite wafer is facilitated and preparation of a high-quality perovskite single crystal device is facilitated.

The invention relates to the technical field of organic light emitting display, particularly relates to an OLED device and a manufacturing method thereof, and a display apparatus. The OLED device comprises a positive electrode, a negative electrode and at least two organic light emitting layers arranged between the positive electrode and the negative electrode; a charge generation layer is arranged between two adjacent organic light emitting layers; and a micro structure is arranged on at least one of the two surfaces, adjacent to the two organic light emitting layers, of the charge generationlayer. By virtue of the scheme provided by the invention, the contact area between the charge generation layer and an adjacent functional layer is enlarged, and the effective areas of the generated charges and injected charges of the charge generation layer are enlarged, so that charge generation and transmission capability of the charge generation layer is further improved, and the working voltage of the device is lowered effectively.

The invention provides a light regulation method of a white light emitting diode. The method comprises the steps of: measuring spectral power of a red light-emitting diode, a yellow light-emitting diode, a blue light-emitting diode and a green light-emitting diode which independently emit light in a rated current working state; calculating the relative light mixing ratio of the red light-emittingdiode, the yellow light-emitting diode, the blue light-emitting diode and the green light-emitting diode; and according to the relative light mixing ratio, employing the control unit to output controlsignals with different duty ratios to the red light-emitting diode, the yellow light-emitting diode, the blue light-emitting diode and the green light-emitting diode, wherein the peak wavelength of the red light-emitting diode is between 670 nm and 700 nm. The white light emitting diode prepared by the method has high color rendering, low blue light hazard and the adjustable color temperature, and can be used for obtaining the white light emitting diode with the high color rendering and the low blue light hazard at any color temperature.

The invention provides a white LED light source and an LED lamp comprising the same. The spectrum of the white LED light source has a first spectrum peak in the wavelength range of 459-495nm and a second spectrum peak in the wavelength range of 400-450nm; a trough exists between the first spectrum peak and the second spectrum peak; and the white LED light source excites the fluorescent powder to emit light through a dual-wavelength blue light chip, so that the blue light hazard of the spectrum is remarkably reduced, the color rendering property is improved, and R6, R12 and the color fidelity Rf are improved. Meanwhile, the physiological effect is achieved, people feel comfortable and are facilitated to concentrate, and the learning and working efficiency is improved. The white LED light source is high in fitting degree coefficient of the spectrum and the same-color-temperature solar spectrum, has the advantages of being excellent in light color quality, low in blue light harm, high instability and low in cost, and can fully meet the performance requirements of the LED light source in the field of illumination.

The invention discloses an LED (Light-Emitting Diode) doped optical filter, which comprises a first substrate, a second substrate, a first light absorbing material and a second light absorbing material, wherein the first light absorbing material is doped in the first substrate; the second light absorbing material is doped in the second substrate; both the first light absorbing material and the second light absorbing material comprise rare-earth oxides; the absorbing wavelength of the first light absorbing material is 570-600 nanometers; and the absorbing wavelength of the second light absorbing material is 440-480 nanometers. Due to the adoption of the LED doped optical filter, the spectral content of two segments of different wavelengths in a white light spectrum can be readjusted, the color rendering of an LED is enhanced, and unbeneficial spectrum bands which influence the health of human beings and organisms are reduced.

The invention relates to a preparation method of a high-color-rendering quantum dot fluorescent powder film. The preparation method comprises the following steps: taking a PET film as a base material; coating composite gel comprising red and blue green single-color quantum dots and yellow rare-earth fluorescent powder; preparing composite gel; coating a film; covering and pressing the film; curing and forming the film to obtain the quantum dot fluorescent powder film. According to the preparation method provided by the invention, optical parameters of spectrum of each component and the proportion of the components are optimized, so that the obtained quantum dot fluorescent powder film has a relatively high color retendering property, has a color rendering index which can be 95 or more, has color temperature within an ideal sunlight range, and is suitable for the full-spectrum LED (light emitting diode) lighting field.

The invention provides covering-type decorative concrete and a construction method thereof. The covering-type decorative concrete comprises, by weight, 30-40% of portland cement, 3-8% of a polymer, 0-5% of organic fibers, 0-5% of an inorganic pigment, 0-1% of an additive and 41-67% of an inorganic mineral filler. The decorative concrete is polymer-modified cement mortar, can be directly used as a covering layer with thickness of 5 millimeters to several centimeters on the existing concrete base and has a uniform structure and high plasticity. The covering-type decorative concrete can form different decorative patterns such as stone, wood, brick and tile patterns with white or various colors by different molds. Through a special-purpose coloring agent, daedal color effects are obtained.

The invention provides a photochromic controllable illumination device by using automatic white balance for regulation and control, and an illumination method thereof. The illumination device comprises an LED lamp-house module, a radiator and a reflecting shade. The illumination method comprises the following steps: after the light source is connected with electricity, light rays which are shined on an astigmatic sheet by LED light source and reflected back from the reflecting shade, are received and transformed to an analog signal by a photoelectric sensor which is arranged in the LED light source, then adaptation and digital-to-analogue conversion ( A/D conversion) by an A/D conversion circuit are carried out, the comparison with a targeted value in a value comparison circuit and a data processing circuit is carried out and a light regulating instruction is output, finally, the red light output response curve of the light source is regulated by a red light control circuit, and the processes are repeated till the error between the measured value and the targeted value is within the allowed range.

The invention discloses ultraviolet LED lamp encapsulating glue and a preparation method thereof. The ultraviolet LED lamp encapsulating glue is prepared from an agent A and an agent B in a mass ratio of 1: 1, wherein the agent A comprises one or more of 95-99% by weight of bisphenol A epoxy resin and cycloaliphatic epoxide resin, 1-3% by weight of an agent A additive, 0.01-1% by weight of an optical brightener, 0.01-1% by weight of a defoamer, 96-99% by weight of one of methylhexahydrophthalic anhydride and hexahydrophthalic anhydride, 0.1-2% by weight of an accelerant and 0.1-4% by weight of an agent B additive. According to the ultraviolet LED lamp encapsulating glue disclosed by the invention, the LED lamp is small in luminous decay, simple to prepare and low in manufacturing cost.

Polycarbonate copolymers have been prepared by solid state polymerization (SSP). A mixture comprising partially crystalline BPA polycarbonate oligomer having a weight average molecular weight of 10,000 daltons and a source of additional structural units and optionally a catalyst is reacted under SSP conditions to afford a copolycarbonate. Sources of additional structural units include high and low molecular weight polycarbonates incorporating repeat units not derived from BPA and various bisphenols such as BPI, BPM and tetramethyl BPA.

It is an object of the present invention to provide a manufacturing method for a light-emitting element that emits light at a plurality of emission wavelength peaks. Furthermore, it is an object of the present invention to provide a light-emitting device and electronic device in which color rendering is high. A manufacturing method for a light-emitting element includes the following steps: a step for forming a first electrode, a step for forming a light-emitting layer over the first electrode, a step for forming a second electrode over the light-emitting layer, and a step for performing heat treatment on the light-emitting layer; where the step for forming the light-emitting layer includes a step for forming a layer containing a host material and a layer containing a material acting as a luminescent center so that the two layers are in contact with each other.

Disclosed are a fluorescent glass ceramic material and a light-emitting device containing the same. The fluorescent glass ceramic material is composed of glass ceramic materials and fluorescent powder, wherein the glass ceramic materials are SiO2, Al2O3, B2O3 and alkali metal oxides (Na2O and K2O) or divalent metal oxides (CaO, SrO, BaO and ZnO); the fluorescent powder has a molecular formula of LnMRbNyCez, wherein Ln is one or two from La, Lu, Gd and Y, R is one or two from Si and G, 2<=m<=4, 5<=b<=7, 10.5<=y<=11.5, and 0<z<=0.5. The fluorescent glass ceramic material can be excited efficiently by ultraviolet light, near ultraviolet light and blue light, and the main emitting peak of the fluorescent glass ceramic material is positioned at 520-550 nm. The fluorescent glass ceramic materialcan not only avoid the problems of degradation and yellowing caused by traditional fluorescent powder packaging manners, but also further improve the thermal stability of existing fluorescent glass ceramic materials; the light-emitting device containing the fluorescent glass ceramic material can be widely applied to the field of high-density energy excitation lighting and display.

The present invention discloses an organic light-emitting diode (OLED) device with high color rendering comprising a base plate, a first conductive layer, a plurality of white light emitting layers, and a second conductive layer, wherein the spectra of the white light emitting layers possess characteristics of complementarities so as to enhance the color rendering of the emitted white light, and at least one carrier regulating layer is selectively disposed between every two white light emitting layers so as to increase the emitting efficiency and color rendering.

This invention relates to a white light emitting device including a semiconductor emitting chip, a blue-green photoluminescence phosphor and a red photoluminescence phosphor, the two phosphors absorb light emitted by the light emitting semiconductor chip to excite blue-green and red light to be mixed to get the white light.

The invention provides a white-light LED (Light Emitting Diode) and a packaging method thereof, and relates to the technical field of semiconductor packaging. The white-light LED comprises a bracket, wherein a bracket electrode is arranged at the lower part of the bracket; a heat radiation cup is fixed on the bracket electrode; a blue-light chip is arranged on the bracket electrode positioned at the bottom of the heat radiation cup; a conductor is connected between the blue-light chip and the bracket electrode; a fluorescent adhesive is coated in the heat radiation cup; the fluorescent adhesive is prepared by the raw materials of nitride red fluorescent powder R6733, true white fluorescent powder Y4651, green fluorescent powder G3560 and silica gel 6551AB according to the ratio of X:Y:Z:1000, wherein X is 3-10, Y is 80-95 and Z is 2-10. The white-light LED and the packaging method thereof, provided by the invention, have the advantages as follows: the color rendering property of the white-light LED is improved and the color rendering index of the white-light LED can reach 95, so that emitted white lights are more comfortable and softer and much closer to sun lights; and the white-light LED has a small area, so that requirements of people on the short, light and thin white-light source can be satisfied.

The invention relates to a light emitting diode (LED) white lamp with a red light chip and mainly solves the problems of single light spectrum, poor colour rendering and poorer light quality because a white light of the conventional LED white lamp is formed by mixing a blue light and a yellow light. The LED white lamp with the red light chip comprises a circuit board, wherein a light-shading part is arranged on the circuit board; a circular hole is formed in the middle of the light-shading part; a blue light chip which is connected with the circuit board is arranged at the bottom of the circular hole; and the red light chip is also arranged at the bottom of the circular hole. The LED white lamp with the red light chip has the advantages that: the red light chip is added into the conventional white lamp which has only the blue light chip; the colour rendering property of the LED white light is improved, so light spectrum components of the white light are relatively rich, the white light is more approximate to a natural light, and the light spectrum is almost a continuous light spectrum; and the LED white lamp can be applied to lighting of fields with high colour-rendering requirement on a light source such as a cafe, an evening party and a hotel.

The invention discloses a fluorescent adhesive for COB encapsulation of an LED. The fluorescent adhesive is formed by mixing the following components in parts: 80-100 parts of allochroic silicagel, 50-60 parts of waterproof silicagel, 3-5 parts of rare earth long-acting noctilucent powder, 2-3 parts of reflecting powder, 2-3 parts of colorful flash powder, 1-3 parts of aluminium paste, 3-5 parts of resin diamond, 10-15 parts of blue fluorescent powder and 10-12 parts of yellow fluorescent powder. As the materials, such as the noctilucent powder and the reflecting powder, are added into the fluorescent adhesive for COB encapsulation of the LED, the spatial chroma uniformity of the LED is great, and the color rendering of the LED is effectively improved. The fluorescent adhesive is particularly suitable for vehicle lamps and can reduce the difference between the scene seen by a driver and the actual object state, so that the driving safety is improved.

The invention discloses a manufacturing method for a light diffusion sheet for improving color rendering of a white LED lamp. The light diffusion sheet at least comprises a spectrum regulating layer and a light diffusion sheet substrate. The spectrum regulating layer can coat the light diffusion sheet substrate through a silk screen printing method and is irradiated to cure through an ultraviolet lamp. The light diffusion sheet is capable of improving the red light component in the light emitting spectrum of the white LED lamp so as to improve the color rendering of the white LED lamp.

The invention discloses a deep red luminescent material. A composition formula of the material is Sr2-aMaLa1-xGa3-bNbGe3-cQc (O1-d+F2D)14 : xEu, wherein the x is the doping amount of Eu, the M is at least one of Ca and Ba, the N is at least one of Al and In, the Q is at least one of Si and Sn, the x is larger than or equal to 0 and smaller than or equal to 1, the a is larger than or equal to 0.001 and smaller than or equal to 0.4, the b is larger than or equal to 0.001 and smaller than or equal to 0.5, the c is larger than or equal to 0.001 and smaller than or equal to 0.5, and the d is larger than or equal to 0.001 and smaller than and equal to 0.1. The preparation method comprises the following steps of evenly mixing raw materials, putting in a crucible and firing for 1 to 4 hours in high temperature of 1000 to 1350 DEG C; breaking, grinding, washing and drying sinter to obtain the luminescent material. The red luminescent material prepared through the method disclosed by the invention has stable performance and high luminescent intensity.

The invention discloses an adjustable 380-780nm wavelength COB packing technique. The packing technique is characterized in that a packing framework of the packing technique is that a plurality of 380-780nm wavelength light-emitting chips including a red light chip, an infrared chip, a blue light chip, an ultraviolet chip, a green light chip and a yellow light chip are arranged on a base material, and the chips further have color temperature in a range between 2700K to 5700K. The adjustable 380-780nm wavelength COB packing technique improves luminous flux, improves light-emitting efficiency, can selectively adjust light-emitting color and color temperature and is suitable for various occasions.

The invention provides a luminous material, a preparation method of the luminous material and a white light LED (light emitting diode) device. The luminous material is applicable to purple light or fluorescence excited by a near ultraviolet light LED, and has the advantages of high quantum yield, high thermal stability and adjustable luminous color. The luminous material provided by the invention belongs to a luminous material capable of emitting complementary colors obtained through the preparation by using first chlorophosphates and second chlorophosphates; the first chlorophosphates are (Sr<8-x-z>Mgx)Si4O8Cl12:zEu<2+>, wherein the x is greater than 0 but smaller than or equal to 0.8, and the z is greater than or equal to 0.01 but smaller than or equal to 0.05; the second chlorophosphates is Sr<8-y-t>Cay)Si4O8Cl12:tEu<2+>, wherein the y is greater than 0 is smaller than or equal to 0.6, and the t is greater than or equal to 0.01 but is smaller than or equal to 0.05. The preparation method of the luminous material has the advantages that the preparation method is simple; the operation is easy; no pollution is caused; the cost is low. The white light LED device has the advantages of good average color rendering property, high dark red color development index and brightness.