53 results about "Dominant wavelength" patented technology

A light emitting device is provided. The light emitting device includes a blue light unit, configured to emit blue light; a green light unit, configured to emit green light; a red light unit, configured to emit red light; and a warm white light unit, configured to emit warm white light. A dominant wavelength of the warm white light is in a range from 570 nm to 600 nm. A color coordinate of the warm white light unit and a color coordinate of the red light unit are respectively located at opposite sides of the Planckian locus. The blue light unit, the green light unit, the red light unit and the warm white light unit are configured to cooperate to emit mixed white light and are configured to adjust a color temperature of the mixed white light.

A light-emitting device includes a substrate, a wiring, a light-emitting element configured to emit light having a main wavelength in a range from 500 nm to 560 nm, and a diffusion member. When chromaticity x and chromaticity y of an emission color of the light-emitting device are measured in each of first and second measurement planes in a range in which an angle at the center of the outer shape is in a range from ±60° with reference to a perpendicular line passing through the center of the diffusion member, an average value α of a difference between a maximum value and a minimum value of a chromaticity difference Δx of the chromaticity x measured in the first measurement plane and a difference between a maximum value and a minimum value of a chromaticity difference Δx of the chromaticity x measured in the second measurement plane is less than 0.0024.

In an embodiment an optoelectronic component includes an active layer sequence configured to emit electromagnetic radiation of a primary wavelength and a ceramic converter element arranged in a beam path of the active layer sequence and configured to convert the primary wavelength at least partly into a secondary wavelength, wherein the ceramic converter element includes a quantum efficiency of at least 90%, a phosphor and a metal oxide powder, wherein the phosphor includes a doped garnet, wherein the ceramic converter element includes Ce and / or Gd doped Y3Al5O12 embedded in a matrix chosen from undoped Y3Al5O12 or undoped Y3Al5O12 and Al2O3, or Ce and / or Gd doped Lu3Al5O12 embedded in a matrix chosen from undoped Lu3Al5O12 or undoped Lu3Al5O12 and Al2O3, and wherein the phosphor and the metal oxide powder are free of second phases.

The invention provides a light-emitting device which is bright in both scotopic vision and photopic vision and reduces dazzling to people. The light-emitting device includes a light-emitting element having a dominant wavelength in the range of 430 nm to 500 nm, and a phosphor excited by light from the light-emitting element and having an emission peak wavelength in the range of 507 nm to 660 nm, and emits light having a dominant wavelength in the range of 490 nm to 500 nm. The S / P ratio, which is the ratio of the luminous flux in scotopic vision to the luminous flux in photopic vision, is 6.5 or less, and the luminous intensity at the luminous peak wavelength of the light-emitting element is higher than the luminous intensity at the luminous peak wavelength of the phosphor.

A fluid separation device includes a centrifugal separator configured to receive a centrifugal separation chamber of a disposable fluid flow circuit, a pump system configured to convey a fluid into the centrifugal separation chamber and to remove a separated fluid component from the centrifugal separation chamber via an outlet, a color-based interface monitoring system configured to determine an interface position between separated fluid components continuously flowing through the centrifugal separation chamber based on dominant wavelength measurements of layers of separated fluid components during a centrifugal separation procedure, and a controller configured to measure the dominant wavelengths of the layers, calculate a duration as a color time for each measured dominant wavelength, set target color times, calculate error signals and calculate control signals to adjust the pump system to control the flow rate and interface position.

Provided is a light-emitting device having a high luminous flux.The light-emitting device comprises a light-emitting element 11 that has a dominant wavelength in a range of 380 nm or more and 485 nm or less, and a fluorescent material layer 31 that includes a fluorescent material emitting light by being excited by light emitted from the light-emitting element 11, and a neodymium compound, wherein the light-emitting device emits light having a dominant wavelength in a range of 584 nm or more and 780 nm or less.

A light-emitting device includes a semiconductor stack, an insulating reflective structure having an opening, and an electrode located on the insulating reflective structure and filled in the opening to electrically connect to the semiconductor stack. The semiconductor stack having includes a main surface, and a side surface inclined to the main surface. The light-emitting device has a dominant wavelength and a peak wavelength. The insulating reflective structure includes: a first part located on the main surface and having a first thickness; and a second part located on the side surface and having a second thickness different from the first thickness. The second part of the insulating reflective structure has a reflectivity of more than 90% for the dominant wavelength or the peak wavelength within an incident angle of 0° to 30°.

The application discloses a kind of LED light-emitting diode light color detection analysis method and system, it is related to LED detection technical field, including: light color acquisition module, for obtaining the spectral data generated in the lighting process of target LED;Timing modeling module, for in the continuous preset time period after target LED starts to emit light, multiple spectral data points are collected at fixed time intervals, main wavelength, color coordinates and fitting color temperature value are calculated to obtain, form multiple time light color parameter sequence, and construct time series model based on the sequence, output time series model and corresponding original parameter sequence.The application realizes the automatic judgment of the stable state of LED light emission by constructing the change curve of light intensity and color coordinates and introducing convergence trend analysis mechanism, effectively avoids the false determination caused by early data instability, and improves the representativeness and accuracy of detection data.

Systems and methods that can employ a bleeding sensor that uses an optical mechanism to detect blood in the patients GI tract are described. The bleeding sensor includes a substrate holding a centrally-located light detector with a broad sensitivity spectrum and at least two light emitters positioned radially around the centrally-located light detector, each light emitter configured to emit light of different primary wavelengths. The bleeding sensor has a gap between each of the at least two light emitters and the centrally-located light detector that accepts the contents of a patients gastrointestinal tract. An optical cap covers the centrally-located light detector and the at least two light emitters to direct the light emitted from the at least two light emitters through the gap and onto the centrally-located light detector.

The present invention relates to a full spectrum light emitting device comprising: a solid state light source for generating excitation light having a dominant wavelength from 420 nm to 480 nm, said excitation light consisting of a plurality of light emissions of different dominant wavelengths; a photoluminescent material for generating light having a peak emission wavelength from 490 nm to 680 nm; wherein the device is used to generate light having a spectral intensity which, at wavelengths from 645 nm to 695 nm, decreases from its maximum in the orange to red wavelength region of the spectrum to 50% of the maximum.

According to an aspect of the present invention, provided may be a light-emitting device comprising: a substrate; a first light-emitting element disposed on the substrate and generating light of a first emission spectrum having a first dominant wavelength, by a current supplied through the substrate; and a second light-emitting element disposed on the substrate and generating light of a second emission spectrum having a second dominant wavelength and at least partially overlapping the first emission spectrum, by the current supplied through the substrate, wherein the intensity of the first dominant wavelength and the intensity of the second dominant wavelength are different from each other.

The invention relates to a medical transfer system (14, 18) for use with a medical pump (1), at least comprising: a tube (14) which is provided and designed to be inserted into a tube receptacle (12) or pump section of the pump (1) in sections in order to transfer a fluid from a reservoir to a patient, and a tube clamp (18) which is provided on the tube (14) and has a predetermined colour and / or optical marking, wherein the tube clamp (18) is provided and designed to be inserted into the pump (1) at least in sections and to be irradiated with a light beam (34e) at / with main wavelengths (42a, 42b, 42c, 42d) using a light source (34) of the pump (1) so that the light (34r) reflected or reflecting off the tube clamp (18) is received by a photodetector arrangement (38; 138; 238) of the pump (1) and separated into individual signals (46a, 46b, 46c, 46d) at the main wavelengths. The invention further relates to a medical clamp module, to a medical pump, and to a method for detecting a medical transfer system in a medical pump.

The application provides a wavelength multiplexing filtering isolation communication method, device and medium, and relates to the technical field of communication. The method comprises the following steps: adjusting a current filtering receiving parameter of a wavelength selective optical filter according to a specified wavelength dynamically allocated; the wavelength selective optical filter receives a wavelength multiplexing optical signal through the current filtering receiving parameter, so as to obtain a current filtering receiving optical signal from the wavelength multiplexing optical signal, and the wavelength multiplexing optical signal is composed of the specified wavelength optical signal through dynamic routing; obtaining a wavelength deviation between a current main wavelength of the current filtering receiving optical signal and the specified wavelength, and compensating the current filtering receiving optical signal according to the wavelength deviation to obtain the specified wavelength optical signal. The application saves resources through wavelength multiplexing, obtains accurate signals through filtering compensation, and enhances signal safety through dynamic allocation of the specified wavelength and dynamic routing.

This invention discloses a novel wide-bin sorting method for circular LED chips, comprising: setting two or three consecutive wavelength screening intervals for a single color of the LED chip; performing characteristic tests on the circular LED chips to obtain test data, the test data including the dominant wavelength of each LED chip; screening qualified LED chips based on the test data, and mapping the LED chips to the corresponding wavelength screening intervals based solely on the dominant wavelength of the LED chips to obtain bin transfer data; and transferring the LED chips on the circular chip to a transfer board corresponding to the wavelength screening interval based on the bin transfer data. Compared with the prior art, this invention sets a wider range of bin intervals, resulting in fewer bins (only two or three), thus improving bin utilization. This invention also discloses a display module manufacturing method and a display module. This method encapsulates and divides LED chips on the same transfer board into LED beads, mixes them, and installs them on a circuit board to form a display module, which can effectively improve the color consistency of the display.

The present application relates to the technical field of water quality detection, in particular to a boiler water quality hardness on-line detector and method based on Lambert-Beer law, which comprises an equipment shell box, an optical module, a fluid control module, a self-cleaning module, a compensation algorithm unit, a data transmission unit, a touch control screen and a warning unit; the optical module comprises an LED light source and an optical probe, the LED light source is used for providing light required for detection, and the optical probe is used for receiving light and collecting absorbance signals. In the boiler water quality hardness on-line detector and method based on Lambert-Beer law, the dual-wavelength anti-interference design eliminates error sources: the optical module adopts a combination of a 520±5nm main wavelength and a 700±10nm reference wavelength, and cooperates with the compensation algorithm unit to calculate and correct the absorbance, so that the interference caused by suspended solids and bubbles in the boiler water sample can be accurately deducted.

The invention relates to the technical field of spectrum regulation and control of beauty instruments, in particular to a spectrum regulation and control method of a dual-wavelength LED beauty instrument, which comprises the following steps: acquiring biological characteristic parameters of a target skin area; dynamically selecting a dominant wavelength of the dual-wavelength LED beauty instrument according to the melanin concentration and a first preset threshold value; acquiring an optical power compensation coefficient according to the skin temperature and a second preset threshold value; generating an optical power regulation and control instruction according to the dominant wavelength and the optical power compensation coefficient; dynamically adjusting an optical power regulation and control instruction through the skin optical reflectivity; obtaining light energy absorption energy of the target skin area based on the heme concentration and the skin water content, and optimizing a light power regulation and control instruction according to the light energy absorption energy; and driving a dual-wavelength LED to generate a composite spectrum according to the optimized optical power regulation and control instruction. According to the method, the biological characteristic parameters of the target skin area are obtained, and the multi-dimensional dynamic regulation and control strategy is combined, so that precise optimization and safety control of the dual-wavelength spectrum are realized.

This application relates to the field of handheld laser rangefinder technology, and in particular to a handheld laser rangefinder and its testing method. The handheld laser rangefinder body includes a shell, a dual-wavelength laser emitting module, an ambient light intensity sensor, an FPGA time-domain signal processing unit, a temperature compensation system, an LCD screen, and control buttons. The dual-wavelength laser emitting module includes a laser and a light receiver disposed at the end of the shell, and an 808nm / 905nm dual-band laser diode disposed inside the shell. By incorporating the dual-wavelength laser emitting module, the ambient light intensity sensor, the FPGA time-domain signal processing unit, and the temperature compensation system, the handheld laser rangefinder can switch the main wavelength in real time via the ambient light sensor. The switching logic is as follows: when the ambient light sensor detects an illuminance greater than 5000 lux, the 905nm band is automatically activated; when the illuminance is less than or equal to 5000 lux, the 808nm band is used, thereby reducing sunlight interference.

Disclosed are a complex phase fluorescent ceramic and a preparation method therefor. The general chemical formula of the complex phase fluorescent ceramic is Ca1-xMnxO-(Re1-yCey)3Al5O12, 0.04≤x≤0.08, 0<y<0.01, Re3+ being one of Lu3+, Y3+ or Gd3+, and the mass ratio of Ca1-xMnxO to (Re1-yCey)3Al5O12 being 10-25:75-90. First, Ca1-xMnxO powder is prepared by a high-temperature solid-phase method; the obtained powder is mixed with (Re1-yCey)3Al5O12 raw material powder, and Ca1-xMnxO-(Re1-yCey)3Al5O12 multi-phase fluorescent ceramic is produced using a solid-state reaction sintering method. Since CaO:Mn is encapsulated within the (Re1-yCey)3Al5O12 ceramic, the problem of CaO easily absorbing moisture can be effectively avoided. Under excitation from a 440-460 nm blue laser, the complex phase fluorescent ceramic of the present invention simultaneously emits yellow-green Ce3+ fluorescence, with a dominant wavelength of 510-565 nm, and orange Mn2+ fluorescence, with a dominant wavelength of 600-630 nm. The ceramic exhibits thermal conductivity as high as 14-20 Wm-1K-1 at room temperature. When the blue laser pumping density is 50-80 W / mm2, the complex phase fluorescent ceramic exhibits a relative light conversion efficiency of 99%-99.8% of the initial efficiency and a color rendering index of 80-95, achieving enhanced luminescence stability and color quality under high pump power density excitation.

A light emitting apparatus includes: a substrate; a first light emitting device disposed on the substrate and configured to generate light of a first emission spectrum having a first dominant wavelength by a current supplied through the substrate; and a second light emitting device disposed on the substrate and configured to generate light of a second emission spectrum having a second dominant wavelength and at least partially overlapping with the first emission spectrum. An intensity of the first dominant wavelength and an intensity of the second dominant wavelength are different from each other.

A method of chroma compensation for pixels is provided. The method comprises: driving the first, second and third sub-pixels in each pixel of a micro-LED display to sequentially emit light; measuring the first, second, and third dominant wavelengths separately from the first, second and third sub-pixels of each pixel; and driving the second or third sub-pixel of each pixel to emit light with partial brightness to mix with light having the first dominant wavelength emitted from the first sub-pixel within the same pixel, wherein an adjusted first dominant wavelength presented by the color matching of mixed light is closer to a minimum value, a maximum value, or a mean value among the measured first dominant wavelengths.

The present application discloses a projection display system, which includes: a light source component, a wavelength adjustment component, and a modulation component. The light source component is used to emit projection light; the wavelength adjustment component is arranged in the optical path of the projection light and is used to adjust the spectrum of the projection light so that the ratio of the luminous efficacy of the adjusted projection light to the luminous efficacy of the monochromatic light corresponding to the main wavelength of the projection light is greater than a preset ratio, and the color gamut of the adjusted projection light meets the preset color gamut coverage; the modulation component is arranged in the output optical path of the wavelength adjustment component and is used to perform image modulation on the light emitted by the wavelength adjustment component and output corresponding image light to form a projected image. Through the above method, the present application can balance the brightness and color gamut of the projection display system.

To provide a lighting device or the like capable of suppressing a chromaticity difference during dimming.SOLUTION: The lighting device 40 includes a plurality of LED packages 42 that emit two or more types of light having different chromatic values. The lighting device 40 has a first luminous intensity distribution derived based on spectral luminous efficiencies in a range of wavelengths equal to or greater than 360nm and less than 555nm and slopes of the spectral luminous efficiencies in the range of wavelengths equal to or greater than 360nm and less than 555nm. When a first high region and a first low region lower than the first high region are set, and a second high region and a second low region lower than the second high region are set with respect to a second luminous intensity distribution derived based on spectral luminous efficiencies in a region of wavelengths not less than 555nm and not more than 830nm and slopes of the spectral luminous efficiencies in the region of wavelengths not less than 555nm and not more than 830nm, peak wavelengths of light emitted or dominant wavelengths of light emitted are included in the first low region and the second low region in each of the plurality of LED packages 42.SELECTED DRAWING: Figure 3

A display for a head-worn device includes a planar array of micro-light-emitting diodes (micro-LEDs), a sensor, and a driver. The driver is configured to operate the display in at least two modes. A first mode uses a first current density to produce a first brightness and a first range of colors. In response to the sensor detecting a high ambient light condition, the driver can switch the display to a second, high-brightness mode. In the second mode, the driver uses a second, higher current density to produce a second brightness greater than the first brightness. This increase in current density causes a predictable shift in the dominant wavelength of the micro-LEDs, resulting in a second range of colors that is different from the first. This intentional trade-off between color accuracy and brightness ensures that virtual content remains visible to a user in bright environments.

A lighting device (40) is provided with a plurality of LED packages (42) that emit two or more types of light having different chromaticity values. In the lighting device (40), if a first high region and a first low region that is lower than the first high region are set for a first luminous intensity distribution derived on the basis of the spectral luminous efficiency in a wavelength region of 360 nm or more and less than 555 nm and the slope of the spectral luminous efficiency in the wavelength region of 360 nm or more and less than 555 nm, and a second high region and a second low region that is lower than the second high region are set for a second luminous intensity distribution derived on the basis of the spectral luminous efficiency in a wavelength region of 555 nm to 830 nm inclusive and the slope of the spectral luminous efficiency in the wavelength region of 555 nm to 830 nm inclusive, the peak wavelength of the emitted light or the dominant wavelength of the emitted light is included in the first low region and the second low region in each of the plurality of LED packages (42).

Embodiments of the present application provide an anti-interference detection method and a sample analyzer. When the content of an interferent in a sample exceeds an anti-interference threshold, if anti-interference cannot be achieved by changing the wavelength, the sample to be measured is diluted, so as to achieve anti-interference measurement of the sample. The method provided by the embodiments of the present application comprises the following steps: obtaining the grade γ of an interferent in a sample; when a measurement item of the sample is measured by using multiple wavelengths, obtaining a main wavelength interferent grade threshold γ1 corresponding to a main wavelength matched with the measurement item, and a sub wavelength interferent grade threshold γ2 corresponding to a sub wavelength matched with the measurement item, wherein γ1<γ2; if γ≤γ1, the sample is measured by using the main wavelength; if γ1<γ≤γ2, anti-interference measurement of the sample is performed by using the sub wavelength; and if γ>γ2, the sample is diluted, and then anti-interference measurement of the diluted sample is performed by using the main wavelength or the sub wavelength.

A reconfigurable device is provided for splitting optical beams. The device includes an input port configured to receive an input beam including at least two primary wavelengths, a tunable splitter configured to separate the input beam into at least two beams via at least two routes corresponding to the at least two primary wavelengths, wherein each of the at least two routes is configured to propagate one of the at least two primary wavelengths of the input beam, wherein the tunable splitter includes a bottom electrode, a substrate on the bottom electrode, core segments arranged on the substrate, a top layer, support segments to connect the substrate and the top layer, a top electrode on the top layer, a controllable refractive index layer arranged to fill gaps between the substrate, the support segments, and the top layer; and at least two output ports configured to transmit the at least two beams propagated via the at least two routes.

A near-eye display waveguide device and a near-eye display apparatus are disclosed. The waveguide device comprises m waveguide substrates stacked on each other, m being an integer and m≥3. The device receives image-carrying light with an image field of view angle range, and the image-carrying light comprises light with less than m dominant wavelengths. Corresponding to each dominant wavelength, the m waveguide substrates are formed with at least two coupling-in gratings, the at least two coupling-in gratings are formed on different substrates and have different grating periods, for coupling light in different coupling-in field of view angle ranges into corresponding substrates, the coupling-in field of view angle ranges are each smaller than the image field of view angle range, and the coupling-in field of view angle ranges cover the image field of view angle range as a whole.

The present application discloses a full spectrum lighting system, comprising a full spectrum device, a light supplementing unit, and a control unit. The full spectrum device comprises at least three light-emitting units having different correlated color temperatures, each light-emitting unit corresponds to a source color temperature node, and the source color temperature nodes are distributed in a CIE 1931 chromaticity diagram, so that the chromaticity linear distance L1 between the maximum color temperature node and the minimum color temperature node is not less than 0.04, the chromaticity linear distances between adjacent color temperature nodes are equal, and the chromaticity linear distance L2 between each color temperature node and a standard spectral node on a daylight locus corresponding to the node is not greater than 0.02. The light supplementing unit exhibits a spectrum having a dominant wavelength between 500 nm and 600 nm and a full width at half maximum between 10 nm and 200 nm. The control unit controls the input light power ratio of each light-emitting unit, so that the full spectrum device achieves blended light output between any two source color temperature nodes, and when forming blended light color temperature nodes, controls the input light power of the light supplementing unit, making the spectrum of blended light approximate the daylight locus.

The application discloses a light-emitting device which emits mixed light, wherein the mixed light is mixed by deep red light, green light, sapphire blue light and white light; the color temperature of the white light is 4000K; the main wavelength range of the deep red light is 645nm-670nm, the peak wavelength range is 650nm-675nm, and the half-peak width range is 18nm-40nm; the main wavelength range of the green light is 510nm-540nm, the peak wavelength range is 515nm-545nm, and the half-peak width range is 30nm-65nm; the main wavelength range of the sapphire blue light is 439nm-475nm, the peak wavelength range is 435nm-470nm, and the half-peak width range is 18nm-40nm; and the main wavelength range of the white light is 570nm-610nm, the peak wavelength range is 600nm-640nm, and the half-peak width range is 150nm-225nm. The light-emitting device is mainly used in the technical field of light sources.

Method for characterizing an optoelectronic device and associated characterization device. The present invention relates to a method for characterizing an optoelectronic device (10) capable of emitting an electromagnetic beam in a band of operating wavelengths, the method comprising the following steps: emission of an electromagnetic beam by the optoelectronic device (10), performance, by a detection unit (20), of a series of measurements on a portion of the electromagnetic beam emitted in a band of secondary wavelengths included in the band of operating wavelengths and excluding the band of primary wavelengths, and determination, by a processing unit (22), of characteristics of the optoelectronic device (10) as a function of the series of measurements performed, at least one characteristic being obtained for a band of secondary wavelengths.the determined characteristics allowing evaluation of the operation of the optoelectronic device (10). Figure for the abstract: 1,