986 results about "Wavelength conversion" patented technology

The invention discloses a Micro-LED micro display chip and a preparation method thereof, and relates to the technical field of micro display. The Micro-LED micro display chip comprises a driving panel, a plurality of LED chips and a plurality of LED chips, the plurality of LED units are arranged on the driving panel, the plurality of LED units are provided with a plurality of LED table boards which are in one-to-one correspondence, and each LED unit can be independently driven by the driving panel; the grid structure is provided with a plurality of grid holes, the plurality of grid holes are respectively arranged around the plurality of LED table boards, and concave areas are formed between the LED table boards and the corresponding grid holes; the lens unit is arranged in the concave area and located above the LED unit. And the wavelength conversion layer comprises a plurality of wavelength conversion units, and the plurality of wavelength conversion units are arranged above the lens unit. According to the Micro-LED micro display chip, the absorbance and the conversion lighting effect of the wavelength conversion layer can be improved, the light emitting purity of a pixel area is guaranteed, and the screen color gamut and the color purity of a display are improved.

A system for wavelength-accurate conversion includes a light source configured to pump a first color laser light and a device configured for Kerr-nonlinear wavelength conversion of the first color laser light to a signal laser light and an idler laser light, the device includes: a waveguide configured to couple to the light source; and a microring resonator coupled to the light source via the waveguide. The microring resonator configured to generate the signal laser light and the idler laser light. The microring resonator including a plurality of projections. A number of the projections is linked to a targeted output wavelength for at least one of the signal laser light or the idler laser light, and a refractive index grating strength of each projection of the plurality of projections is linked to a frequency mismatch between modes when comparing to a reference device lacking the plurality of projections.

The invention provides a holmium and ytterbium co-doped mid-infrared microsphere Raman laser and a preparation method thereof, and relates to the technical field of laser preparation, the holmium and ytterbium co-doped mid-infrared microsphere Raman laser comprises an infrared transmission optical fiber, a pump light source, holmium and ytterbium co-doped tellurate glass microspheres and passive tellurate glass microspheres, pump light emitted by the pump light source is guided to a conical region through the infrared transmission optical fiber, and the holmium and ytterbium co-doped tellurate glass microspheres and the passive tellurate glass microspheres are arranged in the conical region; sequentially carrying out optical coupling with holmium and ytterbium co-doped tellurate glass microspheres and passive tellurate glass microspheres; in the holmium and ytterbium co-doped tellurate glass microspheres, the doping amount of the holmium element is 0.3%, and the doping amount of the ytterbium element is 0.45% according to the mass percentage. Compared with the prior art, through the cascade structure of the holmium-ytterbium co-doped microspheres and the passive microspheres, three-step wavelength conversion of pump light-rare earth ion lasing-Raman frequency shift is realized in a single system for the first time, and the wavelength limitation that a traditional single microsphere depends on a rare earth ion fixed energy level is broken through.

The embodiments of the present disclosure provide a display panel, including: a base substrate, a first electrode layer, a luminescent material layer, a second electrode layer, an elastic lens layer and at least one light wavelength conversion layer arranged in sequence. The luminescent material layer is configured to emit an excitation light, the at least one light wavelength conversion layer is configured to convert the excitation light emitted from the luminescent material layer into light of a predetermined color, and the elastic lens layer is configured to converge the excitation light emitted from the luminescent material layer. The embodiments of the present disclosure further provide an electronic device and a method of manufacturing a display panel.

The utility model discloses a cooling system for a stage lamp. The cooling system comprises a chip assembly. The radiator is connected with the chip assembly through a cooling pipeline, and a power source is arranged on the cooling pipeline; one end of the wavelength conversion assembly is connected with the chip assembly through a first backflow pipeline, and the other end of the wavelength conversion assembly is connected with the radiator through a second backflow pipeline. The radiator, the chip and the wavelength conversion assembly are connected into a circulating heat dissipation system through the cooling pipeline and the backflow pipeline, so that the chip and the wavelength conversion assembly can be cooled at the same time through one radiator, the usage amount of the radiator is reduced, and the heat dissipation efficiency is improved.

The invention provides a volume holographic grating exposure parameter determination method and a two-dimensional pupil expansion volume holographic optical waveguide, and the method comprises the steps: carrying out the multiple rotation of a vector of a first light beam, a vector of a second light beam and a holographic photosensitive material when the wavelengths of the first light beam and the second light beam are first recording wavelengths, the rotated vectors of the first light beam and the second light beam and the rotated material position of the holographic photosensitive material are obtained; converting the wavelengths of the first light beam and the second light beam into a second recording wavelength, and rotating the rotated vectors of the first light beam and the second light beam at least once to obtain in-material vectors of the first light beam and the second light beam; determining the in-air vectors of the first light beam and the second light beam according to the in-material vectors of the first light beam and the second light beam; and determining incident angles of the first light beam and the second light beam according to the in-air vectors of the first light beam and the second light beam. According to the method, the manufacturing efficiency of the two-dimensional pupil-expanding body holographic optical waveguide comprising the coupling-in, turning and coupling-out body holographic grating can be improved.

The embodiment of the invention discloses a Micro-LED display chip and a preparation method. The Micro-LED display chip comprises a driving panel, a plurality of LED units, a wavelength conversion layer, a lens unit and a plurality of light condensation layers. According to the Micro-LED display chip provided by the embodiment of the invention, the coverage area of the lens unit can be increased by arranging the at least two overlapped light condensation layers on the lens unit, and the lens unit can fully cover the whole pixel region of the Micro-LED display chip, so that the light condensation effect is improved. According to the utility model, more or all light rays are projected through the lens unit, and tiny light rays are collected and focused to a specific area, so that the brightness and definition of pixels are improved; meanwhile, the lens units can better adjust the angle and distribution of light rays, the color uniformity between pixels is improved, and a display picture is brighter and more vivid. Therefore, the contrast ratio of the Micro-LED display chip is improved, the glare and halo effects are reduced, and the Micro-LED display chip can provide clearer and more vivid visual experience.

Disclosed are a micro-display chip and a preparation method thereof. The micro-display chip includes: a self-luminescence layer, a wavelength conversion layer, and a first transmitting-and-reflecting layer and / or a second transmitting-and-reflecting layer; the first transmitting-and-reflecting layer is disposed between the self-luminescence layer and the wavelength conversion layer; the second transmitting-and-reflecting layer is disposed on another surface of the wavelength conversion layer; the first transmitting-and-reflecting layer has low reflectivity and high transmissivity for the first color light and high reflectivity and low transmissivity for the second color light, and the second transmitting-and-reflecting layer has high reflectivity and low transmissivity for the first color light and low reflectivity and high transmissivity for the second color light. The micro-display chip of the present disclosure can effectively improve the absorbance and color purity of conversion light, thereby obtaining a brighter and purer conversion spectrum.

A color conversion substrate includes: a base part in which a first light-transmitting area and a second light-transmitting area are defined; a first stack disposed on the base part and a second stack disposed on the first stack; a first wavelength conversion pattern overlapping the second light-transmitting area, and disposed on the second stack, where the first wavelength conversion pattern converts light of a first color into light of a second color; and a light-transmitting pattern overlapping the first light-transmitting area and disposed between the first stack and the second stack, where portions of the first stack and the second stack in the second light-transmitting area are in direct contact with each other to constitute a blue light reflective layer.

A method of predicting a lifespan of a display device includes preparing a test panel including a test light emitting element including a first and second test light emitting layers, measuring a luminance of the first and second color of the test panel to acquire first and second deterioration data of the first and second color, calculating a lifespan of a pixel based on the first and second deterioration data, and a first and second color component ratio of first emission light for a thickness of a wavelength conversion layer. The pixel includes a light emitting element emitting the first emission light and mixed light of the first and second color, and the wavelength conversion layer, and a light emitting layer of the light emitting element includes a first light emitting layer emitting light of the first color, and a second light emitting layer emitting light of the second color.

To provide a light-emitting device that emits amber-colored light and has good temperature characteristics. The light-emitting device includes a light-emitting element having a light emission peak wavelength in a range from 380 nm to 470 nm, and a wavelength conversion member including phosphors that absorb at least a part of light from the light-emitting element and emit light. The phosphors include a first phosphor having a light emission peak wavelength in a range from 535 nm to 560 nm, having a half-value width in a range from 100 nm to 120 nm, and containing a nitride containing La, Ce, and Si, and a second phosphor having a light emission peak wavelength in a range from 605 nm to less than 620 nm, having a half-value width in a range from 70 nm to 80 nm, and containing a nitride containing at least one of Ca or Sr, and Eu, Si and Al. The light-emitting device emits light within a region defined by connecting (0.545, 0.425), (0.560, 0.440), (0.609, 0.390), and (0.597, 0.390) in an xy chromaticity coordinate system of a CIE1931 chromaticity diagram.

To provide an optical fiber light source having high spectral wavelength flexibility and enabling incoherent continuous-wave output in a single transverse mode.SOLUTION: An optical fiber light source has: an optical fiber having a first end, a second end, and a tapered part positioned between the first and second ends, which is a single mode fiber; a wavelength conversion part; a light source for exciting the wavelength conversion part; and a support part. The first end outputs radiant light emitted from the excited wavelength conversion part. The tapered part includes: a constricted part; a first tapered region in which a diameter gradually decreases from the second end side toward the constricted part; and a second tapered region in which a diameter gradually increases from the constricted part toward the first end side. The constricted part has a diameter smaller than those of the first and second ends, and has a size of the wavelength or less of the radiant light. The wavelength conversion part is composed of liquid or gas and is disposed so as to surround at least an outer periphery of the constricted part of the tapered part. The light source simultaneously excites the outer peripheral portion surrounding the wavelength conversion part.SELECTED DRAWING: Figure 2

A display device includes a substrate; a partition wall on the substrate; a light-emitting element located in an emission area partitioned by the partition wall on the substrate and extended in a thickness direction of the substrate; a wavelength conversion layer over the light-emitting element in the emission area, and including a base resin and wavelength conversion particles dispersed in the base resin and configured to convert a wavelength of light emitted from the light-emitting element; and an optical member on the wavelength conversion layer and the partition wall and configured to adjust a path of light output from the wavelength conversion layer, and the optical member includes an optical layer and a first protruding pattern protruding from the optical layer toward the wavelength conversion layer.

An illuminating system includes a light source module and a light homogenizing element. The light source module includes at least one sub-light source module, and each sub-light source module includes a light-emitting element, a wavelength conversion element, a light-splitting element, a reflective element and a light guide element. The reflective element is configured to reflect the exited light beam converted by the wavelength conversion element to the light guide element. The light guide element includes a light incident surface, a reflective surface and a light exit surface. By designing the angle between the light incident surface of the light guide element and the light exit surface to be an acute angle, combined with the deflection configuration of the reflective element, the excited beam may be transmitted along different transmission paths without optical loss.

A light emitting device is provided including a wavelength conversion structure configured to convert electromagnetic radiation of a first wavelength in to an electromagnetic radiation of a second wavelength; a plurality of light sources, wherein at least one light source is configured to emit an electromagnetic radiation of the first wavelength, wherein the plurality of light sources are arranged on or above the wavelength conversion structure; and an optical metastructure configured as optical cavity comprising a resonance frequency at about the second wavelength.

The embodiment of the invention discloses a Micro-LED display chip, a display device and a preparation method, the Micro-LED display chip comprises a driving panel, a plurality of LED units, a plurality of grid structures and a wavelength conversion layer, and a rough layer is formed on the side, away from the LED units, of the wavelength conversion layer. On the basis of the arrangement of the rough layer, the Micro-LED display chip can have a larger light emitting surface area, so that the light emitting direction can be changed, total reflection of photons at an interface is reduced, the photon transmittance is increased, the purpose of improving the quantum efficiency is achieved, and the display effect of the Micro-LED display chip is improved. The display brightness and the color saturation of the Micro-LED display chip can be improved by improving the photon transmittance.

The invention provides a light conversion agent, an adhesive film composition, a wavelength conversion adhesive film and a photovoltaic module. The chemical structural formula of the light conversion agent is at least one of formulas I-IV. The imidazole derivative with the specific structure is used as the light conversion agent, has good absorption in an ultraviolet region, is wide in range, almost has no absorption in a visible region, has good visible light permeability, and can better meet the difference requirements of different types of photovoltaic devices on wavelength conversion adhesive films, and the main absorption part is more than 350nm. Furthermore, the light conversion agent has very high absolute light-emitting quantum efficiency, the emission wavelength is basically larger than 430 nm, and the wavelength converted by the light conversion agent can be better utilized by a photovoltaic device.

A display device includes a first inorganic layer disposed on a substrate, a thin film transistor disposed on a first inorganic layer including a semiconductor, a gate, a source and a drain, a storage capacitor including a first electrode and a second electrode, a first organic layer disposed on the thin film transistor and including a contact via, a second inorganic layer disposed between the gate and the semiconductor, a third inorganic layer disposed between the source and the gate, a light emitting diode including an anode electrically connected with the source through the contact via, a cathode and a light emitting layer, a first sealing layer disposed on the light emitting diode, a wavelength conversion layer disposed on the first sealing layer, and a blue light blocking layer disposed on the wavelength conversion layer. The second electrode is disposed between the third inorganic layer and the first organic layer.

An optical device includes a light source with at least two radiation sources, and at least two layers of wavelength-modifying materials excited by the radiation sources that emit radiation in at least two predetermined wavelengths. Embodiments include a first plurality of n radiation sources configured to emit radiation at a first wavelength. The first plurality of radiation sources are in proximity to a second plurality of m of radiation sources configured to emit radiation at a second wavelength, the second wavelength being shorter than the first wavelength. The ratio between m and n is predetermined. The disclosed optical device also comprises at least two wavelength converting layers such that a first wavelength converting layer is configured to absorb a portion of radiation emitted by the second radiation sources, and a second wavelength converting layer configured to absorb a portion of radiation emitted by the second radiation sources.

A display device includes: a display element layer including a light emitting element; an encapsulation layer on the display element layer, the encapsulation layer being formed as a single layer; and a light control layer overlapping with the encapsulation layer, the light control layer including a light control pattern layer including a first wavelength conversion layer, a second wavelength conversion layer, and a light transmission layer, wherein the light emitting element includes a first electrode, an organic light emitting portion on the first electrode, and a second electrode on the organic light emitting portion, and wherein a distance between a top surface of the second electrode and a bottom surface of the light control pattern layer is in a range of 10 nanometers (nm) to 2000 nm.

The invention relates to the technical field of lasers, and discloses a laser wavelength conversion device. Comprises: a polarizing lens; the half-wave plate is arranged on the incident light path of the polarized lens and connected with the electric control system, and the electric control system is used for controlling the half-wave plate to transversely move into the light path or move out of the light path or controlling the angle of the half-wave plate; the frequency doubling light path is communicated with the transmission light path or the reflection light path of the polarized lens; the fundamental frequency light serves as an incident light beam, and when the electric control system controls the half-wave plate not to transversely move into the light path, the fundamental frequency light enters the polarization lens in a vertical line polarization state and is reflected into the first frequency doubling light path, and frequency doubling light with the corresponding wavelength is output; when the electric control system controls the half-wave plate to transversely move into the light path, the polarization state of the fundamental frequency light is changed, the fundamental frequency light enters the polarization lens in a horizontal line polarization state and is transmitted into the next-stage light path, and if a subsequent half-wave plate and the polarization lens are arranged in the next-stage light path, the electric control system further controls the subsequent half-wave plate to transversely move into the light path or adjusts the angle. And outputting the frequency-doubled light with the corresponding wavelength.

A light emitting device includes: a substrate; a light emitting element; a wavelength conversion layer; and a wall surrounding the wavelength conversion layer, having an opening portion exposing at least a part of a top surface of the wavelength conversion layer, and containing a light reflective material. The surface of the wall includes a top surface provided at a higher position than the top surface of the wavelength conversion layer, and an inner surface forming the opening portion. The wall includes a first portion surrounding the wavelength conversion layer, and a second portion provided over the first portion and surrounding the first portion. The opening portion is hollow. An angle of a corner portion between the top surface and the inner surface of the wall is in a range of 90 degrees or greater and less than 180 degrees.

To provide: a barrier film which, when used in a wavelength conversion sheet, can attain both a high retention of luminance and a reduction in unevenness of color; and a wavelength conversion sheet and a backlight member that employ the barrier film.SOLUTION: The barrier film comprises a resin substrate, a first vapor-deposited aluminum oxide film, a first coating layer, a second vapor-deposited aluminum oxide film and a second coating layer, which are laminated in this order. The first and second coating layers are each a cured product of a resin composition containing alkoxysilane and a hydroxyl-group-containing water-soluble resin. The first and second vapor-deposited aluminum oxide films exhibit a vapor-deposited-film peak top ratio P from 1.05 to 1.60 inclusive when X-ray absorption fine structure analysis is performed, where P=(intensity peak top around 1572 eV) / (intensity peak top around 1566 eV).SELECTED DRAWING: None

Disclosed are a light emitting device and a method for manufacturing a light emitting device. The light emitting device according to the present application may be formed by an epitaxial growth process. In addition, the light emitting device according to the present application includes a first semiconductor layer, a light emitting layer and a second semiconductor layer. Light emitting wavelengths of the first region, the second region and the third region are different by setting composition of the light emitting layer of the top walls of the plurality of protrusions, the side walls of the plurality of protrusions and the recessed region between the plurality of protrusions to be different, therefore, the light-emitting device may emit light of different wavelengths without using phosphors or quantum dots for wavelength conversion, thereby prolonging the lifespan of the light-emitting device and improving the reliability of the light-emitting device.

A light-emitting device includes: a base; a light-emitting element disposed on the base; a light-transmissive member disposed on the light-emitting element, containing a wavelength conversion member, and having an inclined lateral surface; and a light adjustment member disposed on and in direct contact with an upper surface of the light-transmissive member.

To provide a wavelength conversion mechanism capable of outputting a plurality of systems of ultraviolet laser beams having high output power (pulse energy) without causing deterioration of an optical element for branching.SOLUTION: The wavelength conversion mechanism converts the wavelength of a pulsed laser light with a predetermined repetition frequency, the pulsed laser light being a wavelength-conversion-target light, into laser light in an ultraviolet region, the wavelength conversion mechanism including: a branching optical system for branching the wavelength-conversion-target light into pulse units in a time domain; and a plurality of ultraviolet region wavelength conversion elements for converting each of pieces of the wavelength-conversion-target light branched by the branching optical system into the laser light in the ultraviolet region.SELECTED DRAWING: Figure 2

The transmission-type wavelength conversion device comprises a laser scattering layer, a heat sink substrate layer, a wavelength conversion layer and a light homogenizing layer which are sequentially arranged in a stacked mode. Wherein the laser scattering layer is used for scattering laser from a form of Gaussian distribution of energy and strip-shaped light spots into a form of weak Gaussian distribution of energy and round or similar round light spots, the heat sink substrate layer is a light-transmitting substrate with the laser transmittance being 75% or above, and the wavelength conversion layer is used for converting at least part of the laser into fluorescent light. And the light homogenizing layer is used for scattering fluorescent light and residual laser. According to the device, on the premise that no extra lens is added and the size of the white laser light source is not enlarged, through the dual effects of the laser scattering layer and the light beam homogenizing layer, effective shaping of laser spots can be achieved, and the color uniformity and the illumination quality of the white laser light source can be remarkably improved; and a feasible solution is provided for application of a miniaturized and integrated white laser light source in a circular light spot scene.

To provide: a barrier film which, when used in a wavelength conversion sheet, can attain a high retention of luminance; and a wavelength conversion sheet and a backlight member that employ the barrier film.SOLUTION: The barrier film comprises a resin substrate, a first vapor-deposited aluminum oxide film, a first coating layer, a second vapor-deposited aluminum oxide film and a second coating layer, which are laminated in this order. The first and second coating layers are each a cured product of a resin composition containing alkoxysilane and a hydroxyl-group-containing water-soluble resin. The first and second vapor-deposited aluminum oxide films exhibit a vapor-deposited-film peak top ratio P greater than or equal to 0.70 and less than 1.05 when X-ray absorption fine structure analysis is performed, where P=(intensity peak top around 1572 eV) / (intensity peak top around 1566 eV).SELECTED DRAWING: None

The invention provides a satellite-borne laser radar and reanalysis data multi-wavelength atmospheric transmittance inversion method, and relates to the field of atmospheric remote sensing. According to the inversion method, on the basis of satellite-borne laser radar data and reanalysis data, the atmospheric transmissivity under different wavelengths is accurately calculated in combination with wavelength conversion and data fusion; comprising the following implementation steps: step 1), selecting satellite-borne laser radar data; step 2), screening the extinction coefficients; step 3), generating a space-time matching data set; step 4), establishing an aerosol extinction-transmittance conversion model; step 5), calculating atmospheric molecule and ozone transmittance; step 6), performing layered transmittance fusion; and 7) calculating the transmittance of the whole atmosphere.

The invention discloses a Micro-LED micro display chip and a preparation method thereof, and relates to the technical field of micro display. The chip comprises a driving panel; a plurality of LED units; the wavelength conversion layer at least comprises a plurality of first wavelength conversion units, and the first wavelength conversion units are arranged above the light emitting surfaces of the LED units; the first wavelength conversion unit is provided with a first curved surface, and the first wavelength conversion unit is used for converting the first color light emitted by the LED unit into second color light and gathering the second color light. In the embodiment of the invention, the wavelength conversion layer in the Micro-LED micro-display chip has two functions at the same time, specifically, the wavelength conversion layer has the function of converting the first color light emitted by the LED unit into the light of other colors and also has the function of gathering the converted color light, so that the display brightness of the Micro-LED micro-display chip is improved, and the brightness of the micro-LED micro-display chip is improved. In addition, the thickness of the Micro-LED micro display chip can be thinner, and the preparation process is simpler.