22results about How to "Luminous stability" patented technology

The invention relates to the technical field of composite materials, and provides a cellulose nanocrystalline composite material as well as a preparation method and application thereof. The cellulose nanocrystal composite material provided by the invention comprises cellulose nanocrystals and a fluorescent dye, and the fluorescent dye comprises a Hurst fluorescent dye. According to the present invention, the hydrophilic Hurst fluorescent dye is selected to be compounded with the cellulose nanocrystal, such that the composite material with characteristics of circular polarization fluorescence property, phosphorescence emission property and high fluorescence quantum yield is provided, and the material is environmentally friendly, has small influence on the environment during preparation and use, and has great application potential in the anti-counterfeiting field.

The invention discloses a quantum dot diffusion plate and a preparation method thereof.The quantum dot diffusion plate comprises an upper layer diffusion plate, a middle layer diffusion plate and a lower layer diffusion plate, and the upper layer diffusion plate and the lower layer diffusion plate are located on the two sides of the middle layer diffusion plate; the middle diffusion plate comprises the following components in parts by mass: PBT resin, PEI polymer microspheres, surface carboxylation oil-soluble CdSe / ZnS quantum dots, glutaraldehyde, ethanol and the like, and the quantum dot diffusion plate prepared by the invention also has the advantages of stable luminescence, high light transmittance, high mechanical strength, fatigue resistance and the like on the premise of keeping high water and oxygen barrier property and luminous efficiency; the advantages of the quantum dot diffusion plate and the PBT resin are integrated, and the application prospect is wide.

The invention discloses a preparation method of a perovskite quantum dot two-dimensional array. Comprising the following steps: S1, preparing a precursor solution A; s2, synthesizing perovskite quantum dots; s3, centrifugally purifying the perovskite quantum dots once; s4, self-assembling perovskite quantum dots into a quantum dot two-dimensional array through light induction; and centrifugally purifying the perovskite quantum dot two-dimensional array once. Compared with traditional monodisperse perovskite quantum dots, the two-dimensional perovskite quantum dot array structure provides a more ordered and efficient path for charge transmission, energy loss in the transmission process is reduced, meanwhile, the ordered arrangement mode can enhance the stability of the structure to a certain extent, the influence of external factors on the optical performance is reduced, and the optical performance is improved. The unique structure is beneficial to improving the quantum yield of luminescence, the optical band gap can be more accurately regulated and controlled, and luminescence with specific wavelength is realized; the array structure enables the material to have better mechanical performance and adapt to more application scenes.

The present invention relates to a phosphor substrate, a light-emitting substrate, and a lighting device. The phosphor substrate of the present invention is a phosphor substrate with a plurality of light-emitting elements mounted on one side, and comprises: an insulating substrate; a first electrode group, which is arranged on one side of the insulating substrate and has a plurality of electrodes bonded to the plurality of light-emitting elements; and a phosphor layer, which is arranged on one side of the insulating substrate and comprises a phosphor whose peak wavelength of light emission when the light emission of the light-emitting elements is used as excitation light is in the visible light region, and the insulating substrate comprises bismaleimide resin and glass cloth.

The present application provides a kind of ultraviolet irradiation device, which is greatly miniaturized compared with existing configuration.The ultraviolet irradiation device includes: a lampshade, which is formed with a light extraction surface; an excimer lamp, which is housed at a position separated from the light extraction surface in a first direction; a first electrode block, which is arranged in contact with the outer surface of the light emitting tube of the excimer lamp from the side opposite to the light extraction surface in the first direction; a second electrode block, which is arranged in contact with the outer surface of the light emitting tube of the excimer lamp from the side opposite to the light extraction surface in the first direction at a position separated from the first electrode block in a second direction parallel to the tube axis of the excimer lamp; and a pressing member, which is arranged at least one of a position further away from the second electrode block than the first electrode block in the second direction and a position further away from the first electrode block than the second electrode block in the second direction, and abuts against the excimer lamp.

The invention relates to the technical field of organic light-emitting materials, and discloses a stable light-emitting free radical material based on a space-induced energy level inversion effect, the light-emitting free radical material is a light-emitting free radical compound based on a donor-bridging group-free radical structure, and a donor group and a free radical are not directly linked but are close to each other in space. The key properties of the light-emitting free radical material are that a donor group is connected with a free radical through a bridging group, the obtained free radical molecule realizes high-efficiency photoluminescence through space charge transfer, and the special property of energy level inversion is realized through a space induction effect; not only is the molecular stability enhanced, but also the transition path of electrons is optimized, so that the luminescence process is more efficient and stable.

The invention discloses a multi-channel water quality online detection device and method based on a fluorescence imaging system, and the device comprises a sample flow cell which is a channel formed by a plurality of straight pipes with rectangular cross sections through end-to-end communication and used for water sample circulation; an emission light window is formed in the outer side wall of the straight pipe, and an excitation light window is formed in the bottom surface of the straight pipe; emitted light generated by the emitted light module enters the sample flow cell from an emitted light window and is used for exciting fluorescent substances in the water sample to generate a fluorescent effect; the fluorescence imaging and detection module comprises a dark light correction sheet, a CMOS (Complementary Metal Oxide Semiconductor) photosensitive device and a plurality of groups of exciting light filters, and the exciting light emitted from the exciting light window is received by the CMOS photosensitive device after passing through the filters; and the control and analysis module is used for analyzing the fluorescence intensity signal received by the CMOS photosensitive device and calculating the concentration of the fluorescent organic pollutants in the water sample. The multi-channel water quality on-line detection device disclosed by the invention can realize on-line real-time monitoring of fluorescent organic pollutants in water.

The present invention belongs to the technical field of inkjet printing, and specifically discloses a method for preparing a stable fluorescent PeQD ink suitable for EHD inkjet printing, comprising the following steps: (1) preparing a Cs precursor, (2) preparing PeQD, and (3) preparing PeQD ink. The PeQD ink prepared by the present invention can eliminate the coffee ring effect in inkjet printing, make the thickness of the pixel points of the color conversion layer more uniform, thereby achieving a uniform light emission effect; it can realize three-dimensional printing, and control the pixel point thickness by controlling the voltage application time without changing the pixel point size of the color conversion layer, which can not only make the pixel point light emission more uniform, but also significantly reduce blue light leakage and improve light conversion efficiency.

The utility model provides a penetrating lamp with optical fibers, and belongs to the technical field of lamps. The through lamp solves the problem that an existing through lamp cannot enable a light-emitting surface to be continuous and uniform. The penetrating lamp with the optical fiber comprises a lamp shell, the optical fiber, a lampshade and a light source module. The light-emitting material adopted by the penetrating lamp is the optical fiber, and the light-emitting surface of the optical fiber has a continuous and uniform effect, so that the penetrating lamp can emit light stably, other parts do not need to be additionally arranged, and the manufacturing cost of the lamp can be effectively reduced; secondly, according to the penetrating lamp, the light source module is arranged outside the lamp shell, the internal space of the penetrating lamp can be effectively reduced, and therefore when people manufacture the lamp, the space between the lamp shell and the lampshade can be reduced, the thickness of the lamp is reduced, and the weight of the lamp is effectively reduced.

This application provides an exposure control method, an apparatus, and an electronic device. For a camera module with a variable aperture, a luminance level of a shooting environment is determined based on a current f-number, an exposure time corresponding to a current frame of image, a luminance value of the current frame of image, a gain corresponding to the current frame of image, a calibration value of photosensitivity of the camera module, and a corresponding image luminance value when the photosensitivity of the camera module is calibrated. A target luminance value is determined based on the luminance level of the shooting environment. Then the luminance value of the current frame of image is converged toward the target luminance value. According to the method, when the aperture is changed, luminance of an image seen by a user is always stable, thereby improving visual experience of the user.

The present invention relates to the technical field of lighting equipment, and specifically to a wide-angle spotlight with adjustable light emission angle and a method for adjusting the light emission angle, wherein the wide-angle spotlight with adjustable light emission angle comprises a lamp holder and a shell adapted to the lamp holder, wherein the shell comprises a cylindrical portion and a conical portion respectively located inside and outside the lamp holder, wherein the cylindrical portion is adapted to the lamp holder, and a reflector is provided on the inner wall of the conical portion; the wide-angle spotlight with adjustable light emission angle also comprises: a lamp body, which is movably arranged in the cylindrical portion and connected to a rotating adjustment mechanism installed at the center of the cylindrical portion, wherein the rotating adjustment mechanism can drive the lamp body to move in the reflector along the axial direction of the cylindrical portion to change the light emission angle, and finally, an effective adjustment function for the light emission angle is realized, and during debugging, the stability of the light emission can be guaranteed.

The present invention relates to a phosphor substrate, a light-emitting substrate and a lighting device. The phosphor substrate (30) of the present invention has a plurality of light-emitting elements (20) mounted on one side. The phosphor substrate (30) comprises: an insulating substrate (32); a first electrode group (34) arranged on one side of the insulating substrate (32) and having a plurality of electrodes connected to the plurality of light-emitting elements (20); a phosphor layer (36) arranged on one side of the insulating substrate (32) and comprising a phosphor whose peak wavelength of light emission when the light emission of the light-emitting element (20) is used as excitation light is in the visible light region; and a second electrode group (38) arranged on the other side of the insulating substrate (32) and having a plurality of electrodes.

The invention discloses a hydrogen sulfide sensing detector based on cholesterol modified lipid perovskite as well as a preparation method and application of the hydrogen sulfide sensing detector, and belongs to the technical field of biological industry. According to the invention, phospholipid and cholesterol with high biocompatibility are adopted to construct a stable protective layer for the hydrophobic perovskite nanoparticles, so that the hydrophobic perovskite nanoparticles can emit light stably, the stability of perovskite is remarkably improved, and an ideal platform is provided for accurate detection of hydrogen sulfide. According to the hydrogen sulfide sensing detector based on cholesterol modified lipid perovskite, the detection limit and response speed of hydrogen sulfide are remarkably improved, the risk of false negative results is reduced, a visual and visual detection means is provided for detection of hydrogen sulfide, the detection limit is as low as ng / mL, development of a gas sensing technology is promoted, and the application prospect is wide. The accuracy and efficiency of harmful gas detection are improved, and meanwhile, a new research direction is provided for application of nano materials in the field of environmental monitoring.

A waterproof light bar and a waterproof rotary display mechanism relate to the field of electronic display products and comprise a waterproof shield, a waterproof glue layer, a first circuit board and LED lamp beads. Wherein the first circuit board is fixed to the waterproof protective cover, the plate face, deviating from the waterproof protective cover, of the first circuit board comprises a lamp bead mounting face and a non-lamp-bead mounting face, and the LED lamp beads are mounted on the lamp bead mounting face; the waterproof glue layer covers the plate face, close to the waterproof shield, of the first circuit board, the peripheral side faces of the first circuit board and the non-lamp-bead mounting face at the same time. The structural design of the waterproof light bar can improve the waterproof effect, reduce the failure rate of electronic components, prolong the service life and improve the image display quality.

The utility model discloses a road surface brightness coefficient measuring device adopting a high-power light source. The road surface brightness coefficient measuring device comprises a shading shell, a high-power lighting device, two cameras and a computer, the shading shell comprises a 1 / 4 spherical panel with the sphere center being a point O, and the inner face of the shading shell is a light receiving screen which is formed by a matte white coating and conforms to Lambert cosine reflection characteristics. The light receiving screen is divided into a plurality of areas by the shading plates which are arranged in a latticed manner; the high-power lighting device comprises a shell, a high-power LED lamp and a light source light emitting pipeline, a concave curved surface reflector, an illuminometer and a concave lens are arranged in the shell, a downward 1-degree included angle is formed between the light emitting direction of the light source light emitting pipeline and the horizontal plane, and the light emitting direction passes through a point O; the concave lens is perpendicular to the light emitting direction. Diaphragm groups are sequentially arranged in the light source light emitting pipeline along the light emitting direction; and the two cameras transmit the shot images on the light receiving screen to the computer. The device is used for rapidly and accurately measuring the brightness coefficient of any point on the road surface.

The utility model relates to a photovoltaic - display integration quantum dot backlight module of display technical field, including photovoltaic element layer, optical coupling layer, quantum dot film layer and conductive and optical modulation layer who laminated and bonded in proper order, photovoltaic element layer is silicon -based solar cell panel, optical coupling layer includes high light transmittance polymer base, and the upper surface of high light transmittance polymer base is distributed micron -sized prism array or diffusing reflection particle, and the lower surface of high light transmittance polymer base is plated with anti -reflective film, quantum dot film layer includes main part and the perovskite quantum dot of embedding main part, and conductive and optical modulation layer includes conductive layer and optical modulation layer. The utility model reduces the dependency on power supply, realizes two -way light energy utilization, reduces power consumption, and the display picture color is more bright and colorful, real, improves optical uniformity while isolating external interference, ensures long -term stable light emission under the complex environment outdoors, relieves thermal stress, prevents material corrosion and cracking, and the module stability is high.

This application relates to the field of smart meter technology, specifically to a smart meter designed to address the technical problem of reducing power consumption in smart meters, thereby ensuring product compliance and improving the product's green energy efficiency. To this end, the smart meter of this application includes a rectifier module, a DC power supply module, and a communication module. The rectifier module provides a first DC voltage to the DC power supply module. The DC power supply module includes a DC-DC converter; the fifth terminal of the DC-DC converter is connected to the first DC voltage, and the sixth terminal of the DC-DC converter is connected to the communication module, used to convert the first DC voltage into a third DC voltage to power the communication module. Through this configuration, the smart meter of this application has lower heat loss and higher conversion efficiency, thereby effectively reducing the power consumption of the smart meter.

The invention provides a diagnosis device and method based on a visible-near infrared absorption spectrum technology. Comprising a spectrum acquisition device and a host. By establishing a regression model of visible-near infrared absorption light transmission spectrum data and the number of staphylococcus aureus in goat milk, the correlation between the number of bacteria and the milk goat mastitis is determined, and spectrum data are collected in real time to evaluate the health state of the milk goat mastitis, so that effective diagnosis of the milk goat mastitis is realized. The method has the advantages of being easy and convenient to operate, short in consumed time, high in accuracy rate and the like, accurate detection of milch goat mastitis can be easily achieved, and powerful support is provided for milch goat health management and disease prevention and control.

The utility model provides a display backlight module and equipment, the display backlight module comprises a lower iron frame and a middle iron frame, the middle iron frame is covered on the lower iron frame, a reflecting film, a light guide plate, a lower diffusion film, a lower BEF film, an upper BEF film and a DBEF film are arranged between the lower iron frame and the middle iron frame from bottom to top, one inner side wall of the lower iron frame is connected with an LED light bar through an adhesive tape, and the other inner side wall of the lower iron frame is connected with a light guide plate. The LED lamp strip comprises a plurality of LED lamp beads and a plurality of thermistors, and a first limiting column and a plurality of second limiting columns are arranged on the face, facing the lower diffusion film, of the light guide plate. By arranging the lower BEF film, the upper BEF film and the DBEF film, the display performance of the display backlight module is greatly improved; the thermistor is arranged, so that the reliability of the display backlight module at extreme air temperature is improved; by arranging the first limiting column and the second limiting column, the multiple layers of membranes are limited, and the structural stability of the display backlight module is improved.

The invention relates to the technical field of white-light LEDs, in particular to yellow fluorescent powder for white-light LEDs, a preparation method and a white-light LED device, raw materials of all elements are weighed according to the chemical formula in proportion, and after weighing, the raw materials are directly dissolved in solvent acetone, N, N-dimethylformamide, dimethyl sulfoxide, methanol or acetonitrile to be stirred or subjected to ultrasonic reaction. And directly filtering the mixed solution added with the raw materials to obtain a powder particle crude product. And cleaning the crude product with acetone, N, N-dimethylformamide, dimethyl sulfoxide, methanol or acetonitrile, drying, crushing and sieving to obtain the yellow fluorescent powder. The simplest and direct aqueous solution synthesis method is adopted, the operation is simple and convenient, the reaction temperature is low, the reaction is rapid, additional energy consumption is not needed, the repeatability is high, the defects of high temperature, high pressure and the like of traditional fluorescent powder preparation are avoided, and white light can be emitted without adding other fluorescent powder; the raw materials are rich in source, low in production cost, high in commercial use value and beneficial to long-term development.

This utility model discloses an adjustable red-green light source for a dual-color water level gauge, relating to the field of electronic technology. It includes a horizontally placed substrate, with a square wave generator and a drive circuit respectively located at both ends of the top of the substrate. A duty cycle adjustment circuit is also located at the center of the top of the substrate. The drive circuit is electrically connected to both the square wave generator and the duty cycle adjustment circuit. The square wave generator and the duty cycle adjustment circuit are electrically connected to each other. Multiple positioning slots are formed on the top of the substrate. This utility model, through the cooperation of the square wave generator, the duty cycle adjustment circuit, and the drive circuit, can achieve a wide range of brightness adjustment for the light source, adapting to different application requirements. The light source is flicker-free, provides stable and uniform illumination in the camera, meeting the adjustment requirements of the red-green light source for a dual-color water level gauge, and ensuring the display effect of the water level gauge's liquid level in the camera.

The invention discloses a display driving device, a control method thereof and a display device. The display driving device comprises a power supply module and a display driving module. The power supply module comprises a power supply end which outputs power supply voltage; the display driving module is connected with the power supply end and used for generating gamma voltage according to reference voltage, and the reference voltage changes along with power supply voltage; and the display driving module is also used for comparing the value of the power supply voltage with the value of the first set voltage and controlling the magnitude of the power supply voltage output by the power supply module according to a comparison result. The display brightness of the display device can be compensated, and the display effect of the display device is improved.