720 results about "Wavelength conversion" patented technology

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 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 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

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.

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 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.

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.

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.

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 provides an illumination system and projection equipment. The lighting system comprises a light source module, a wavelength conversion device, a first light guide assembly, a second light guide assembly and a micro-lens array module. The light source module is used for providing a plurality of green and blue laser beams. The wavelength conversion device is used for generating fluorescent light beams. The first light guiding assembly and the second light guiding assembly are used for guiding a fluorescent light beam and a green laser light beam respectively. The fluorescent light beams form fluorescent light spots on the first area of the first side face of the micro-lens array module. The plurality of green laser beams form a plurality of green light spots on a second area of the first side surface of the micro-lens array module. The first region is adjacent to the second region. The illumination system and the projection equipment provided by the invention avoid energy loss and have good light uniformity.

Provided in the present application are an exposure parameter determination method and apparatus for a volume holographic grating, and a two-dimensional exit pupil expansion volume holographic optical waveguide. The method comprises: when the wavelengths of a first light beam and a second light beam are a first recording wavelength, rotating a vector of the first light beam, a vector of the second light beam, and a holographic photosensitive material multiple times, so as to obtain rotated vectors of the first light beam and the second light beam, and a rotated material position of the holographic photosensitive material; shifting the wavelengths of the first light beam and the second light beam to a second recording wavelength, and rotating at least once the rotated vectors of the first light beam and the second light beam, so as to obtain in-material vectors of the first light beam and the second light beam; on the basis of the in-material vectors of the first light beam and the second light beam, determining in-air vectors of the first light beam and the second light beam; and on the basis of the in-air vectors of the first light beam and the second light beam, determining the incident angles of the first light beam and the second light beam. The method can improve the manufacturing efficiency of a two-dimensional exit pupil expansion volume holographic optical waveguide including coupling-in, turning and coupling-out volume holographic gratings.

A beam projection apparatus includes a light source, micromirror component, a light guide lens set, a projection lens, a condensing lens with a lens portion and an asymmetrical lens portion extending from the lens portion and having a cut surface, and a wavelength conversion component disposed at a side of the condensing lens for at least partially converting a wavelength of a color light and reflecting the color light to the condensing lens. The light source is disposed corresponding to the cut surface and emits the color light. The micromirror component is disposed at another side of the condensing lens relative to the wavelength conversion component. The light guide lens set is disposed on a light exit axis of the lens portion to guide the color light to be incident to the micromirror component for forming a projection beam. The projection lens receives the projection beam for optical projection.

The invention discloses a small-size wavelength conversion device and a light source device thereof, and belongs to the technical field of optical illumination. The wavelength conversion device can convert most of the exciting light with the first polarization state into excited light and change the polarization state of the remaining exciting light. The light source device comprises the wavelength conversion device, an excitation light source, a dichroscope, a shaping lens group and a reflector. Light splitting and light combination are performed through the dichroscope based on the polarization state and the wavelength, and the unused exciting light is returned to the wavelength conversion device for recycling by using the reflector, so that an independent blue light processing light path is canceled. The size of the light source is effectively reduced, the cost is reduced, and the light source is easier to adapt to an existing stage lamp structure.

The invention provides a light conversion adhesive film for sunlight wavelength conversion and a preparation method thereof, the light conversion adhesive film comprises a compound of formula I and a substrate transparent to visible light, the definition of each group in the compound of formula I is described in the specification, and the mass fraction of the compound of formula I in the light conversion adhesive film is 0.001%-3%. The light conversion adhesive film can be used for a solar cell so as to enhance the efficiency and the stability of the cell.

A display device includes a display unit including a lower substrate and first, second, and third light emitting elements disposed on the lower substrate, a color filter unit including an upper substrate having a lower surface facing the first, second, and third light emitting elements, a filler disposed between the display unit and the color filter unit and including a wavelength conversion particle. The color filter unit further includes a color filter layer including first, second, and third color filters disposed on the lower surface of the upper substrate, a bank layer disposed below the color filter layer and including first, second, and third openings, a first column spacer filling the first opening, and a second column spacer filling the second opening.

A lighting device according to an embodiment comprises a substrate, a light emitting device disposed on the substrate, a first reflective member disposed on the substrate, a resin layer disposed on the first reflective member, and a wavelength conversion layer disposed on the resin layer, wherein the resin layer includes a first resin layer, a second resin layer spaced apart from the first resin layer, and a third resin layer disposed between the first and second resin layers; the wavelength conversion layer includes a first wavelength conversion layer disposed on the first resin layer and a second wavelength conversion layer disposed on the second resin layer, and the height of the second resin layer is different from the height of the first resin layer; and the light emitting device may be disposed in a region vertically overlap the second and third resin layers but vertically overlap the first layer.

The present disclosure provides a light-emitting device and a manufacturing method thereof, a taillight and a vehicle. The light-emitting device includes at least one light-emitting element located on one side of a backplane, wherein a wavelength of a first light emitted by each light-emitting element is 500 nm to 580 nm; a wavelength conversion layer located on one side of the at least one light-emitting element away from the backplane and configured to emit a second light with a different color from the first light under the excitation of the first light; and a first optical structure located on one side of the wavelength conversion layer away from the backplane, and including one or more optical elements, each of which is configured to focus the second light along a direction perpendicular to the backplane.

Light-emitting device assembly (100; 102) comprising: a substrate (120; 220); a plurality of light-emitting device chips (110; 210) arranged linearly and spatially separated from one another on the substrate (120; 220); and a plurality of wavelength conversion units (130; 230) on surfaces of the plurality of light-emitting device chips (110; 210), wherein the plurality of wavelength conversion units (130; 230) each have regions extending over regions between the plurality of light-emitting device chips (110; 210), wherein each of the plurality of wavelength conversion units (110; 210) has: a longer side extending in a first direction in which the light-emitting device chips (110; 210) are arranged;and a shorter side that is shorter than the longer side, wherein shorter sides of wavelength conversion units adjacent in the first direction of the plurality of wavelength conversion units (110; 210) are spaced apart from each other, wherein side faces of the shorter sides are exposed, wherein each of the plurality of wavelength conversion units (130; 230) has several phosphor layers (131, 132, 133; 134, 135; 231, 232, 233; 234, 235), and wherein the phosphor layers (131, 132, 133; 134, 135; 231, 232, 233; 234, 235) are stacked sequentially according to the lengths of wavelengths such that a light-emitting phosphor layer with a shorter wavelength is located at one bottom and a Light-emitting phosphor layers with a longer wavelength are arranged on a surface.

The invention provides a light conversion adhesive film containing a thermally activated delayed fluorescent material for sunlight wavelength conversion and a preparation method thereof, the light conversion adhesive film comprises a compound of formula I and a substrate transparent to visible light, the definition of each group in the formula I is described in the specification, and the mass fraction of the compound of formula I in the light conversion adhesive film is 0.001%-3%. The light conversion adhesive film can be used for a solar cell so as to enhance the efficiency and the stability of the cell.

This lighting device is provided with: a light-emitting unit that emits light in a first wavelength band; a phase modulation unit that performs spatial optical phase modulation on incident light from the light emitting unit; a wavelength conversion unit that emits light in a second wavelength band different from the first wavelength band by performing wavelength conversion on incident light from the phase modulation unit; and a lens optical system that guides the emitted light from the wavelength conversion unit to the projection lens, in which the phase modulation unit generates a reproduced image formed in the wavelength conversion unit as a reproduced image of a first wavelength band, and the lens optical system forms a reproduced image of the second wavelength band in the optical path using the projection lens based on the light emitted from the wavelength conversion unit.

A wavelength conversion device including a wavelength conversion module and a driving assembly is provided. The driving assembly is suitable for driving the wavelength conversion module to rotate while taking a central axis as a rotating axis. The wavelength conversion module includes a disc, a wavelength conversion layer and a counterweight. The wavelength conversion layer is disposed on a bearing surface of the disc. The counterweight is disposed on the disc. The counterweight is closer to the central axis relative to the wavelength conversion layer. The counterweight includes a first counterweight element. A plurality of particles of the first counterweight element are evenly distributed in a first photo-curable material of the first counterweight element to form the first counterweight element. In a direction parallel to the central axis, a plurality of particle orthogonal projections of the plurality of particles on the bearing surface at least partially overlap.

A wavelength conversion module includes: a phosphor member; and a light-transmissive substrate that is directly bonded to the phosphor member, wherein a higher thermal conductivity of the light-transmissive substrate is higher than a thermal conductivity of the phosphor member, and the light-transmissive substrate has a thickness in a range from 100 μm to 600 μm.

A light source device and a projector. The light source device includes: a first light source that emits first light; a wavelength conversion element that converts the first light into second light; a first optical member that transmits the first light and reflects the second light; a first light guide part for guiding the second light; a first reflection member that reflects the first light and the second light; and a support member that supports the wavelength conversion element. The wavelength conversion element has a first surface on which the first light is incident, a second surface and a third surface that intersect the first surface and face opposite sides to each other, and a fourth surface and a fifth surface that intersect the first surface, the second surface, and the third surface and face opposite sides to each other. The first reflection member is disposed on the second surface side of the wavelength conversion element and the first light guide portion, the second light is emitted from the third surface side of the first light guide portion, and the support member has a first support portion that supports the fourth surface and a second support portion that supports the fifth surface. The first optical member covers a side of the first light guide portion disposed between the first support portion and the second support portion opposite to the wavelength conversion element.

A wavelength conversion device (100) includes: a substrate (110), a reflective layer (120) on the substrate (110), and a wavelength conversion layer (130) on the reflective layer (120). The reflective layer (120) includes an adhesive (121) and reflective titanium dioxide nanoparticles (122). The nanoparticles (122) have a particle size of about 200 nanometers to about 500 nanometers. The reflective layer (120) has enhanced thermal stability. A method of manufacturing a wavelength conversion device is also disclosed herein.