31 results about "Laser display" patented technology

The invention provides europium-doped silicate green fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of luminescent materials. The green fluorescent powder can generate narrow-spectrum green light with the peak value located at 532 nm under excitation of 450 nm blue light, the full width at half maximum is 46 nm, a white light LED device prepared based on the fluorescent powder has a 110% NTSC color gamut, and it is indicated that the green fluorescent powder has excellent application value in backlight display. The saturation threshold value of the fluorescent powder reaches 21.6 W / mm < 2 > under the excitation of 450nm blue laser, and the lumen at the moment reaches 1157.9 lm. The green fluorescent powder disclosed by the invention has the advantages of high luminous efficiency, narrow full width at half maximum, high light saturation threshold under blue laser excitation, high lumen efficiency and the like, and has application feasibility in the aspect of laser display.

The invention relates to the technical field of laser display, in particular to a laser speckle suppression waveguide structure, a laser display device and a speckle suppression method. The laser speckle suppression waveguide structure comprises a substrate layer, a lower cladding, a waveguide core area and an upper cladding which are stacked from bottom to top. Wherein the waveguide core region comprises an input section, an arc turning section and an output section; the arc turning section is used for combining laser beams from different input sections and outputting the combined laser beams from different output sections in parallel; the waveguide structure is also provided with a waveguide phase disturbance part used for destroying laser transmission coherence and / or an electrically tunable phase modulation part used for destroying laser dynamic coherence. The invention provides a waveguide structure for laser speckle suppression, a laser display device and a speckle suppression method, and aims to solve the problems that a speckle suppression scheme in the prior art is poor in suppression effect, large in system size, low in integration level, high in optical loss and incapable of dynamically adapting to different display scenes.

The invention discloses a flexible laser backlight plate and a preparation method, and relates to the technical field of laser display, the flexible laser backlight plate comprises a volume scattering particle composite layer, a reflecting layer, a light guide main body layer and a connecting end, and an optical fiber side light leakage optical fiber group is arranged in the light guide main body layer; the connecting end is arranged at one end of the backlight plate and provided with a light inlet end face corresponding to the light inlet end of the optical fiber side light leakage optical fiber set. In the optical fiber side light leakage optical fiber group, the side leakage structures of the optical fibers are non-uniformly distributed along the length direction of the optical fibers, and preset brightness distribution can be formed in the light guide main body layer, so that the preset brightness distribution can be formed and kept on the light emitting surface of the flexible laser backlight plate in a bent or flattened state; the problems of light path change and uneven brightness caused by flexible deformation are effectively solved.

The application relates to a field-induced modulation heterogeneous integrated photon display chip and a manufacturing method thereof, and a laser display system. The field-induced modulation heterogeneous integrated photon display chip comprises a first substrate, a monochromatic laser located on one side of the first substrate, a waveguide layer, a first modulator and a second modulator. The monochromatic laser is used for outputting light. The waveguide layer is located on the side of the monochromatic laser close to the first substrate and comprises a grating coupler, a beam splitter, an interferometer and an optical waveguide structure arranged in sequence along a first direction. The first modulator is used for performing primary frequency modulation on the light output by the monochromatic laser, and the first modulator is located on the side of the waveguide layer away from the first substrate. The second modulator is used for performing secondary frequency modulation on the light, and the second modulator is located on the side of the optical waveguide structure away from the first substrate. The application improves the color regulation and control capability of the field-induced modulation heterogeneous integrated photon display chip, optimizes the performance of the chip and reduces the size of the chip.

A laser display system 100 is configured to increase the dynamic range of a laser diode by modulating an operating current applied to the laser diode based on a desired sequence of brightness levels and a temperature of the laser diode. In some embodiments, a measuring circuit measures a voltage of the laser diode at a given current, which indirectly indicates the temperature of the laser diode, thus obviating the need for a direct measurement of temperature. In addition, in some embodiments, the measuring circuit identifies a threshold current of the laser diode based on a range of current values at which values of the current multiplied by the derivative of the voltage against the current vary relatively rapidly. By compensating for temperature effects and identifying the threshold current, a driver of the laser diode more precisely controls light output of the laser diode across an increased dynamic range.

The utility model relates to the technical field of building measurement, and discloses a wall flatness detection device which comprises an outer box and a measuring plate, the top of the outer box is provided with a laser detection device, the front side of the outer box is fixedly connected with a winding shell, the outer wall of the winding shell is communicated with an outlet, the winding shell is internally provided with a measuring tape, and the measuring tape is connected with the measuring plate. The right side of the measuring plate is arranged on the left side of the outer box, the front side of the measuring plate on the upper side is rotationally connected with a rotating block, one end of the measuring tape is installed on the right side of the rotating block, the front side of the measuring plate is fixedly connected with a handle, and the right side of the measuring plate is provided with a recording mechanism. According to the utility model, the laser emitted by the laser detection equipment is displayed on the measuring plate to measure the laser, the whole device is relatively small and is more convenient to carry, and the laser position displayed on the scales and the marking panel are used for counting data, so that the device is more convenient to use.

This invention belongs to the field of projection display technology, specifically disclosing a holographic optical element, including a substrate and a holographic recording layer disposed on the substrate. The holographic recording layer is made of holographic optical material, and a polarization hologram is recorded within the holographic optical material. This invention provides a holographic optical element primarily used in polarization recovery systems in fields such as laser display, optical projection, and polarized illumination. It is used to convert S-light in partially polarized light output from a laser into P-light, achieving polarization unification, thereby improving light energy utilization and solving the problems of large size, complex fabrication, and high cost of existing polarization recovery schemes.

An optical waveguide combiner having an output coupler comprising an array of embedded partially reflective dielectric mirrors expanding and coupling a virtual, optionally color, image generated by a laser display engine into a user EMB, wherein the dielectric mirrors are configured having a wavelength band for each lasing band of the laser display engine that includes wavelengths of light in the lasing band and in a range of wavelengths over which the lasing band is expected to drift, a reflectivity angular range exhibiting a first reflectivity, a transmittance angular range exhibiting a second reflectivity less than the first reflectivity, and a see-thru angular transmittance range having high transmittance for natural light incident on the facets.

The application discloses a kind of multilayer optical film and its preparation method, imaging device, including providing optical glass substrate, anti-reflection layer is deposited on optical glass substrate, anti-reflection layer is designed using split film design algorithm, and designed split pattern is transferred to anti-reflection layer;High damage threshold protection layer is deposited on anti-reflection layer, heat management layer is deposited on high damage threshold protection layer, reflective layer is deposited on heat management layer by evaporation, form multilayer film structure, the interface bonding force between multilayer film structure is improved by annealing treatment to the multilayer film structure formed, set annealing condition is preset temperature, to obtain multilayer optical film;Through the optimization design of whole preparation process, and give consideration to anti-laser damage capacity, heat management layer provides thermal stability, reflective layer improves the efficiency of optical system, to manufacture high performance, multifunctional multilayer optical film, adapt to the high requirements of laser display system.

The present invention relates to the technical field of rare earth luminescent materials and provides a red nitride phosphor, and a preparation method therefor and a use thereof. The chemical composition of the red nitride phosphor of the present invention is Sr2[Mg1-xLixAl5-xSixN7]:yEu2+, wherein 0.001≤x≤0.50 and 0.0005≤y≤0.20. The phosphor is based on a nitride system, exhibits strong light absorption of blue light at 400-500 nm, has an excitation peak value of about 460 nm, can be effectively excited by blue laser light, can emit red fluorescence under blue light excitation, has an emission peak value adjustable in the range of 635 nm to 685 nm and a full width at half maximum adjustable in the range of 75 nm to 90 nm, and greatly contributes to high color gamut in display devices. The phosphor, when used in various laser display devices using blue light high-power lasers as excitation sources, has the advantages of strong luminous brightness, high luminous efficiency, and stable physical and chemical properties.

The invention relates to a reflective fluorescent glass converter with heat dissipation through holes as well as a preparation method and application of the reflective fluorescent glass converter. The reflection type fluorescent glass converter comprises a heat dissipation substrate (4), a reflection layer (3), a fluorescent glass layer (2) and a scattering layer (1) which are stacked and arranged layer by layer, a penetrating heat dissipation through hole array is arranged on the heat dissipation substrate (4), and each heat dissipation through hole (5) is filled with high heat conduction metal. The heat dissipation performance of the fluorescent glass layer (2) is effectively improved through the heat dissipation through hole array and the filled high-heat-conduction metal, and the scattering layer (1) covering the surface of the fluorescent glass layer (2) is combined to assist heat conduction and heat dissipation. The problem that a single-side heat dissipation structure of a traditional reflection type fluorescent glass converter is prone to generating thermal deposition on the outer surface away from the heat dissipation substrate (4) under the high-power condition is thoroughly solved. The reflective fluorescent glass converter has the advantages of high light-emitting saturation threshold, high light extraction and the like, and can be applied to the fields of high-power laser illumination, laser display and the like.

The invention discloses a laser hovering emergency flight traffic light system based on intelligent scheduling and multi-source perception. The flight execution unit can precisely hover above a road, and the height and the position are adjusted according to a task instruction; the sensing acquisition unit acquires traffic flow, signal lamp state and environment brightness information in real time; the instruction scheduling unit automatically identifies a signal fault area according to the sensing data, plans a flight path and a hovering position of the unmanned aerial vehicle, and sets a display time sequence and duration of a laser signal; the laser display unit projects red, yellow and green light beams in the air to replace a ground traffic light for traffic indication; the local emergency control unit can independently execute a pre-stored rule when communication is interrupted, and continuous output of traffic signals is kept; the system can realize multi-unmanned aerial vehicle cooperative scheduling through a wireless network, has the characteristics of quick response, flexible deployment and high reliability, and remarkably improves the safety and command capability of urban traffic in an emergency state.

The invention discloses a perovskite quantum dot glass film composite material and a preparation method and application thereof. The preparation method comprises the following steps: blending glass powder containing CsPb (BrxI1-x) 3 quantum dots with an organic carrier to obtain heat conduction slurry; spin-coating the sapphire substrate with the heat-conducting slurry; the sapphire substrate coated with the heat conduction slurry is subjected to stepped heat treatment, and the heat treatment comprises a glue discharging step at the temperature of 150-250 DEG C and a high-temperature dense bonding step at the temperature of 500-600 DEG C, so that interface bonding between the glass film and the sapphire substrate is achieved. According to the invention, the interface-bonded perovskite quantum dot glass film is constructed on the sapphire substrate, so that the problem of hot stacking is effectively solved. The prepared composite material has a heat conductivity coefficient as high as 34.81 W / m.k, and a fluorescent color wheel device assembled based on the composite material shows a wide color gamut (the heat conductivity coefficient reaches 93.7% under the Rec.2020 standard) and high working stability under excitation of blue laser, and has a wide application prospect in the field of laser display.

The present application relates to the field of laser unmanned aerial vehicle countermeasure and attack, and particularly relates to a self-adaptive array laser illumination device and an illumination control method of a laser unmanned aerial vehicle countermeasure system, the self-adaptive array laser illumination device comprises four groups of laser illumination emission modules and corresponding illumination laser self-adaptive adjustment systems, each group of laser illumination emission module comprises a laser driver module, a laser, a zoom laser illumination emission lens and a laser illumination emission window. The illumination laser self-adaptive adjustment system comprises a laser pointing two-dimensional adjustment mechanism and a laser pointing self-adaptive control module, and realizes the self-adaptive control function of the size and pointing of the illumination laser spot and the laser display combination mode. The present application can solve the technical problems of multiple targets being unable to be separately illuminated, low illumination power density, short effective illumination distance and blurred boundary of large targets.

The invention discloses a speckle elimination method and a laser display system, and belongs to the field of laser display. In order to reduce the influence of speckles, a feature map and a white map in a projection area are shot through a camera, the feature map is used for establishing projection area extraction information to facilitate subsequent extraction of the projection area in an image shot by the camera, and the white map is used for extracting a noise map according to distribution characteristics of pixel values of a local area; and then, according to the noise map and the connected region, judging whether to perform noise adding operation on an output image of the laser display system so as to achieve the purpose of suppressing speckles. According to the invention, the influence of laser speckles on the visual imaging effect can be improved without changing a curtain or an optical structure.

The present application relates to the field of optical metrology and imaging technology, and particularly to a color speckle measurement method in a laser display system and a measurement device using the method. The measurement method comprises: step a) imaging a target surface showing a color speckle pattern on a modulation plane of a spatial light modulator through an imaging module; step b) dividing the modulation plane into multiple spatial regions, sequentially selecting the spatial regions, guiding the light signals of the selected spatial regions into a dispersion element for spectral dispersion, and then collecting the dispersed spectral data by a first image sensor until the spectral data of all spatial regions on the modulation plane are collected; step c) reconstructing the collected spectral data into a three-dimensional hyperspectral data cube containing spatial and spectral dimensions according to the spatial position information corresponding to the spectral data; and step d) calculating and outputting speckle measurement indexes according to the three-dimensional hyperspectral data cube.

The invention discloses a laser projection device and a wearable device. The laser projection device comprises a laser display assembly; a light combining assembly; the laser display assembly comprises three groups of microcavity laser arrays, each group of microcavity laser array comprises a plurality of laser units, and the laser units in the three groups of microcavity laser arrays have a corresponding relation. The three groups of microcavity laser arrays are respectively used for generating a green laser image, a blue laser image and a red laser image; the light combining assembly is used for combining laser beams emitted by the laser units with corresponding relations to one pixel point, so that the green laser image, the blue laser image and the red laser image are combined into a target laser image; the controller is electrically connected with the laser display assembly, and the controller is used for receiving the driving signal and controlling the display parameter of each laser unit according to the driving signal; and the lens is arranged on the light emitting path of the light combining assembly, receives the target laser image emitted by the light combining assembly and emits a projection image.

The invention provides a method for testing dynamic speckles displayed by laser. The method comprises the following steps of: a) acquiring multiple frames of laser speckle images of an area to be detected by using an imaging device; b) calculating the average space speckle contrast ratio and the average time speckle contrast ratio of the area to be detected according to the multiple frames of laser speckle images; c) collecting the average static space speckle contrast ratio of the test system, and calculating system coherence parameters according to the average static space speckle contrast ratio; step d), according to the formula, calculating to obtain a dynamic component proportionality coefficient of the to-be-measured area; and e) according to the mixed scattering model formula, calculating to obtain the dynamic speckle index of the to-be-measured area.

This invention discloses a nitride single-transverse-mode dual-pass racetrack-shaped microring waveguide for the external cavity of a visible-light FP laser. It employs an AlN ridge waveguide system or a GaN strip waveguide system, achieving low-loss transmission of a single transverse mode in the visible-light band through precise control of waveguide cross-sectional parameters. The waveguide structure consists of two main straight waveguides and a racetrack-shaped microring waveguide forming a dual-pass coupling structure. The main waveguides are equally spaced on both sides of the microring straight track, forming three ports: input, pass-through, and download. This invention utilizes the dual-pass structure to feed back specific mode optical signals into the FP laser cavity, achieving self-injection locking and spectral purification. This invention features rigorous design logic and a compact structure, possessing significant monolithic integration application value in the fields of laser displays and precision atomic clocks.

The application discloses a method for rapidly evaporating electrodes and application of the method in photoelectric devices. The preparation method of the photoelectric device comprises the following steps: using a solution method, sequentially preparing a first interface layer, a functional material layer and a second interface layer on a substrate, and then rapidly evaporating and depositing a counter electrode on the second interface layer; the photoelectric device is a reverse structure; and the spin coating preparation of the second interface layer is completed in 0.5-1 min. The method is suitable for the preparation of reverse, rapidly evaporated photoelectric devices such as organic solar cells, perovskite solar cells, quantum dot cells, organic electroluminescent displays and organic field effect transistors, and is suitable for large-scale production and preparation of applications in clothes, vehicle windows, wall surfaces, windows and electronic products.

The inspection device includes: a laser irradiation unit that irradiates a wafer with laser light; a display that displays information; and a control unit that performs: deriving an estimated processing result that includes information on a modified region formed on the wafer and a crack extending from the modified region when the wafer is irradiated with laser light by the laser irradiation unit in accordance with a set recipe (processing condition); and controlling the display to display an estimated processing result image in which an image of the wafer is depicted together with an image of the modified region and the crack of the wafer, in consideration of a position on the wafer of the modified region and the crack that are derived as the estimated processing result.

This application belongs to the field of light source technology and provides a red fluorescent ceramic, comprising: a fluoride ceramic matrix and first fluorescent particles, second fluorescent particles, and third fluorescent particles distributed within the fluoride ceramic matrix. The first fluorescent particle has a first emission peak, the second fluorescent particle has a second emission peak, and the third fluorescent particle has a third emission peak. The red fluorescent ceramic has an emission wavelength range of 600nm-680nm; wherein the first, second, and third emission peaks are all located within the emission wavelength range and do not overlap with each other. This red fluorescent ceramic can achieve red light emission with high color purity, has high fluorescence conversion efficiency and high thermal conductivity, improves the display color gamut, and is expected to further reduce the cost of laser display light sources. In addition, embodiments of this application also provide a method for preparing the red fluorescent ceramic and a light source device.

The present application discloses a laser display apparatus, a projection display apparatus and a display control method. In response to a signal source switch command, the signal source switch command is parsed to obtain the target signal source to be switched to, and the target signal source is switched to. When the target signal transmitted in the target signal source is a three-dimensional signal and the three-dimensional display state of the target signal source is a predefined state, the display is controlled to display a playing interface, and the three-dimensional video data rendered based on the target signal is played on the playing interface.

Embodiments of the present application provide a liquid crystal device, an optical modulation device and a system, which are applied in the fields of wavelength selective switch, laser radar, unmanned driving, laser display and the like. The liquid crystal device comprises a silicon-based backplane, a liquid crystal layer, a transparent cover plate, a super-structured surface structure and a cladding layer. The liquid crystal layer is located between the transparent cover plate and the cladding layer, the cladding layer is located between the super-structured surface structure and the liquid crystal layer, and the super-structured surface structure is located between the cladding layer and the silicon-based backplane. The device disclosed in the present application produces a pre-tilt angle by preparing a super-structured surface structure, and combines the modulation range of the liquid crystal layer of a traditional LCoS device to improve the overall beam angle scanning range, that is, to realize large-angle deflection of the liquid crystal device (for example, LCoS) while maintaining low insertion loss.

This invention discloses an eye-protecting, energy-saving, sunlight-visible touch display screen and its manufacturing method, comprising a front-light source assembly and a touch display module assembled together. The front-light source assembly includes a cover plate, a high-transparency optical light guide plate, and a composite polarizer sequentially attached together. The touch display module includes a lower glass panel, a high-reflectivity layer, a liquid crystal layer, a transparent touch function sheet, and an upper glass panel sequentially attached together. Under outdoor sunlight or sufficient indoor lighting, this invention does not require the front backlight to be turned on, resulting in lower power consumption and longer battery life compared to fully transparent displays and organic electro-laser displays, greatly alleviating users' battery anxiety. Compared to fully transparent displays and organic electro-laser displays, which use LED backlighting and illumination throughout, there is virtually no blue light damage as long as the external light source is sufficient. The display principle is based on reflecting ambient light to display the image; the display effect is even better under bright outdoor sunlight.

A laser projection device (100) and a wearable device. The laser projection device (100) comprises: a laser display assembly (10), wherein the laser display assembly (10) comprises three microcavity laser arrays (101, 101a, 101b, 101c), each microcavity laser array (101, 101a, 101b, 101c) comprises a plurality of laser units (103), there are correspondence relationships between the laser units (103) in the three microcavity laser arrays (101, 101a, 101b, 101c), and the three microcavity laser arrays (101, 101a, 101b, 101c) are respectively used for generating a green laser image, a blue laser image and a red laser image; a light combining assembly (20), the light combining assembly (20) being used for combining laser beams emitted by laser units (103) having a correspondence relationship to one pixel point, so as to combine the green laser image, the blue laser image and the red laser image into a target laser image; a controller, the controller being electrically connected to the laser display assembly (10), and the controller being used for receiving a driving signal and controlling a display parameter of each laser unit (103) on the basis of the driving signal; and a lens (30), the lens (30) being arranged on a light emitting path of the light combining assembly (20), and the lens (30) receiving the target laser image emitted from the light combining assembly (20) and emitting a projection image.

The application discloses an energy-saving control method and system of a laser page-turning pen, and relates to the technical field of intelligent control systems.The method comprises the following steps: determining the power regulation space of a laser display and a wireless control module of the laser page-turning pen; analyzing the relationship between the laser display brightness and the ambient light, and establishing an energy-saving control module of the laser display; analyzing the relationship between the signal stability and the communication distance, and establishing an energy-saving control module of the wireless control module; and performing energy-saving control based on the above modules when the laser page-turning pen is activated.The technical problem of high energy consumption and low use efficiency caused by inaccurate power regulation in the existing laser page-turning pen is solved, and the technical effect of reducing energy consumption and improving use efficiency while meeting the actual use requirements is achieved by accurately regulating the laser display brightness and the signal transmission power.

This utility model discloses a handheld bio-evidence laser display device, relating to the field of evidence collection equipment technology. The handheld bio-evidence laser display device includes a device body, a first functional module component, a second functional module component, a third functional module component, and a fourth functional module component, all located on the rear side of the device body. By setting up the first, second, third, and fourth functional module components, this utility model allows personnel to easily select different modules according to the actual situation on site, thereby effectively improving the overall practicality and multifunctionality of the device, and significantly enhancing the overall evidence collection efficiency and effectiveness. The protective components effectively protect the camera area of ​​the device body, thereby effectively extending the service life of the device body and further improving the overall practicality of the device.

The utility model belongs to the technical field of projectors, and particularly relates to a vector laser projector based on galvanometer technology, an FAT file management module is responsible for managing laser files in an ILDA format through an SD card interface, opening, reading and switching functions of the files are achieved, and information of the current files is displayed on an LCD screen in real time. After reading a file, the ILDA file analysis module transmits data to the memory management module, and the memory management module is responsible for dynamically distributing and managing a memory to store analyzed ILDA data. And the byte order conversion module ensures that the data format meets the requirements of the DAC output module, so that the DAC output module can generate an analog voltage signal by using the converted data, and the two-dimensional galvanometer system is controlled to refract the analog voltage signal to the corresponding X coordinate and Y coordinate. And the two-dimensional galvanometer control module adjusts the position of the galvanometer in real time according to a signal output by the DAC so as to accurately move a laser beam through refraction of light, and finally animation content defined by an ILDA file is displayed in the space through the laser.

The utility model discloses a laser circuit structure, which comprises a box body, a camera, a laser generating device, a first spectroscope and an optical filter, the box body defines a first direction and a second direction which are perpendicular to each other, the box wall of the box body along the second direction is provided with a laser output port, and the laser output port faces a weldment; the camera is located on the side, opposite to the weldment in the second direction, of the laser output port and used for shooting and recording the welding process of the weldment. The laser generating device is used for emitting laser beams; the first spectroscope is located between the camera and the laser output port and used for reflecting the laser beam emitted by the laser generating device to the laser output port and allowing a dynamic image in the welding process of the weldment to penetrate to a camera head of the camera. The optical filter is located between the camera and the first spectroscope and used for filtering laser presented by welding of the weldment. According to the laser circuit structure, the laser can be filtered on the shooting and recording path of the camera, so that the recorded video is not displayed by the laser, and the welding process of a weldment can be seen clearly.