454 results about "Wavelength conversion" patented technology

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.

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.

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 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.

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.

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.

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.

The present invention relates to a method for producing an optoelectronic component, comprising the steps of: forming a grid having conductive material connecting pieces on the back side of a transparent substrate, wherein cells of the grid are formed between the connecting pieces; placing a wavelength conversion material in at least one cell of the grid; arranging optoelectronic semiconductor chips across the cells of the grid, wherein each optoelectronic semiconductor chip has a front side and a back side, with the front side of the optoelectronic semiconductor chip facing the back side of the substrate, and the optoelectronic semiconductor chips are conductively connected to the grid; arranging a filler material on the back side of the substrate, wherein the optoelectronic semiconductor chips are embedded in the filler material such that the back side of the optoelectronic semiconductor chips is not covered by the filler material; and arranging driver chips across the back side of the optoelectronic semiconductor chips, wherein the optoelectronic semiconductor chips are conductively connected to the driver chips.

To provide a technique for improving light emission intensity for a wavelength conversion member.SOLUTION: A wavelength conversion member comprises a ceramic phosphor which converts the wavelength of incident light, and a reflection film arranged on the ceramic phosphor and including metal reflecting light. The reflection film includes particles formed of a material having a higher fusion point than the metal of the reflection film, and in at least one of particle-containing cross sections as a cross section of the reflection film including cross-sections of particles, the value obtained by dividing a cross-sectional area of a particles by the square of a circumferential length of the particle is 0.02 or larger.SELECTED DRAWING: Figure 1

Provided is a glass that is used in a phosphor-containing wavelength conversion material and from which can be produced a wavelength conversion member less degraded in characteristics of a phosphor owing to firing during production of the wavelength conversion member and having excellent weather resistance. The glass is for use in a wavelength conversion material and contains, in terms of % by mass, 30 to 75% SiO2, 1 to 30% B2O3, over 4 to 20% Al2O3, 0.1 to 10% Li2O, 0 to below 9% Na2O+K2O, and 0 to 10% MgO+CaO+SrO+BaO+ZnO.

A headlamp device includes a headlamp, an object detector, and a controller. The headlamp is mounted on a vehicle and includes a light emitting unit composed of multiple light emitting cells. The object detector detects an object around the vehicle and generates an object detection signal including object coordinates corresponding to a location of the detected object. The controller controls light of the headlamp based on information on the object coordinates. The controller may control the light emitting unit such that at least some light emitting cells are turned off according to an object detection signal. Each of multiple light emitting units includes a circuit board, the multiple light emitting cells separated from each other on the circuit board, a molding member formed between the light emitting structures, and a protective member formed on the molding member to surround sides of the multiple wavelength conversion members while filling a gap between the multiple wavelength conversion members.

The present invention provides a quantum entanglement light source device that takes advantage of the benefits of using optical fibers and can compensate for the decrease in polarization extinction ratio with a simple configuration. [Solution] A quantum entanglement light source device according to one embodiment of the present invention comprises a wavelength conversion unit capable of generating polarized light with a wavelength longer than the wavelength of the pump light, and a polarization control unit provided midway through optical fibers provided on both end faces of the wavelength conversion unit, capable of controlling the polarization direction of the pump light in the wavelength range.

Provided is a glass material which has a low linear thermal expansion coefficient and which can be used more stably as a laser medium. The glass is characterized by containing, in terms of mol%, 45%-85% of SiO2, 3%-23% of Al2O3, 0%-13% of B2O3, 0%-5% of Li2O, and 0.01%-11% of Ln2O3 (Ln is at least one selected from Ce, Nd, Yb, Er, Pr, Sm, Eu, Tb, Dy, Ho, and Tm). The glass is preferably used as a wavelength conversion member 26 of a laser oscillation device 2 that extracts laser light by emitting excitation light L from an excitation light source 20. The wavelength conversion member 26 is disposed between a resonator 22 and a resonator 24.

A display device, a method of manufacturing the display device, and an electronic device are provided. The display device includes: a light emitting element layer disposed on a substrate; a thin film encapsulation layer disposed on the light emitting element layer; a counter substrate facing the substrate; a color filter layer disposed on a surface of the counter substrate and defining a light blocking region and a light transmitting region; a wavelength conversion layer disposed on the color filter layer; and a filling layer disposed between the wavelength conversion layer and the thin film encapsulation layer, in which the wavelength conversion layer includes: a bank overlapping the light blocking region; light-transmitting members disposed between portions of the bank and spaced apart from each other; and organic layers spaced apart from each other and covering the light-transmitting member, in which the bank is interposed between the organic layers, and lower surfaces of the organic layers and lower surfaces of the bank are disposed on the same layer.

Provided is a wavelength conversion member manufacturing method and a wavelength conversion member including a sintered body having improved light-tightness of a surface other than a light incident surface and a light exit surface. A wavelength conversion member manufacturing method including a sintered body having a light incident surface, a light exit surface, and a light reflection surface different from the light incident surface and the light exit surface includes: a sintered body preparation step of preparing a sintered body including inorganic particle and phosphor particle; and a recess formation step of performing acid treatment on the sintered body to form a plurality of recesses in the light reflection surface of the sintered body.

A light source device includes a first light source for emitting first light, a first wavelength conversion element for converting the first light into second light, a first optical layer for transmitting the first light and reflecting the second light, a second light source for emitting third light, and a light guide section for guiding the second light and the third light. The first wavelength conversion element has a first surface on which the first light is incident via the first optical layer, and a second surface and a third surface which intersect the first surface and face away from each other. The second light source is disposed in a region on the second surface side of the light guide section. The first optical layer reflects the third light in addition to the second light, and a portion of the second light and the third light travels through the light guide section and is emitted from the region on the third surface side of the light guide section.

A color conversion sheet according to an embodiment of the present invention comprises: a base layer; and a wavelength conversion layer that is stacked on at least one surface of the base layer and comprises a matrix resin, an organic phosphor, and a wavelength absorbent, and thus the color conversion sheet experiences low color change, has excellent reliability, and can achieve a color gamut DCI of at least 99.5% by adjusting the phosphor emission wavelength. Also provided is a backlight unit comprising the color conversion sheet.

The invention discloses a handheld rapid three-dimensional fundus blood supply imaging system and method.The system comprises an upper computer, a laser excitation module, a probe, a data collection module and a space positioning module, the laser excitation module, the probe, the data collection module and the space positioning module are connected with the upper computer, and the laser excitation module conducts wavelength conversion on input pump laser through the stimulated Raman scattering principle to generate excitation light; the exciting light is then transmitted to the probe for high-speed scanning, the probe receives real-time pose feedback of the space positioning module at the same time so as to eliminate the influence of operation jitter, the data acquisition module pre-processes a photoacoustic signal acquired by the probe and then transmits the photoacoustic signal to the upper computer, and a distribution diagram is generated through an image reconstruction algorithm and analyzed. According to the invention, four clinical troubles of poor molecular specificity, depth-resolution imbalance, low clinical adaptability and deficiency of quantitative standards in the existing imaging technology are fundamentally solved, and a universal tool is provided for early screening of eye ground ischemic diseases.

A light source device and a projector. Provided are a light source device and a projector capable of suppressing a decrease in wavelength conversion efficiency and a decrease in image quality. This light source device is provided with: a light source unit having a light-emitting element that emits light; a light guide member on which the light emitted from the light-emitting element is incident and which emits the light; a support member that supports the light guide member; a pressing part that presses the light guide member against the support member; a measurement unit that measures a characteristic value related to the temperature of the light guide member; a control unit that acquires the characteristic value measured by the measurement unit; and a temperature adjustment unit that adjusts the temperature of the light guide member, and the control unit controls the temperature adjustment unit on the basis of the characteristic value.

The invention relates to an optical device cover plate, a light source device and lighting equipment, and mainly relates to the technical field of electronic device packaging. The optical device cover plate is applied to the light source device with a packaging shell module, and the packaging shell module is provided with a containing space. The optical device cover plate is used for sealing and covering the containing space and comprises a metal cover plate, an optical sheet and a wavelength conversion sheet. The metal cover plate is used for covering the accommodating space; and the metal cover plate is provided with a light-transmitting through hole communicated with the accommodating space. And the optical sheet covers the light-transmitting through hole and is in welded connection with the metal cover plate. The wavelength conversion piece is fixedly arranged on the optical piece and located on the axis of the light-transmitting through hole. The light source device comprises a packaging shell module, an excitation light source and the optical device cover plate. The packaging shell module comprises a substrate and a box dam, and the box dam is arranged in a surrounding mode to limit a containing space. The excitation light source is arranged in the accommodating space. The optical device cover plate covers the containing space, and the metal cover plate is connected with the box dam in a welded mode. The light source device is good in heat dissipation effect.

A wavelength conversion device includes a phosphor member and a plurality of nanoantennas. The phosphor member has one surface on which an excitation light is incident, includes a phosphor excited by the excitation light to emit a fluorescence, and has an uneven structure on another surface in an opposite side of the one surface. The uneven structure includes a plurality of projecting portions each provided in one direction along the other surface at a pitch smaller than a peak wavelength of the fluorescence. The plurality of nanoantennas are provided at upper surfaces of the plurality of projecting portions and made of a metal material.

The application discloses a pump-repump-probe time-resolved spectrum system for measuring luminescence and absorption, comprising a laser beam splitting module, a probe light path construction module, a pump light path regulation module, a repump light path adjustment module, a double-channel signal acquisition module and a light path coupling and converging module. The same femtosecond laser is used to split a light beam, two-stage light splitting is performed to obtain initial light beams of pump, repump and probe light paths, and each light path is subjected to delay adjustment, wavelength conversion, focusing and other treatments, and then is precisely coupled at the same spatial position of a sample. The double-channel signal acquisition module synchronously captures luminescence signals and probe light transmission signals of the sample, and realizes data acquisition in combination with reference light path calibration. The test method acquires multidimensional dynamic information through light path optimization, light beam coupling, signal synchronous acquisition and analysis. The system realizes synchronous detection of luminescence and absorption signals under the same excitation condition, and solves the test error and single mode limitation of the traditional independent system.

A wavelength conversion component includes a substrate, a reflection layer, and a phosphor layer. The reflection layer is disposed on the substrate and extends along a first direction. The reflection layer has a top surface that is away from the substrate. The top surface has a height variation on a second direction that is perpendicular to the first direction along the first direction. The phosphor layer is disposed on the reflection layer. The phosphor layer has a thickness variation on the second direction along the first direction. A ratio of the height of the top surface and the thickness of the phosphor layer increases and decreases reciprocally along the first direction.