110 results about "Laser display" patented technology

The utility model provides an optical machine illumination system and laser projection equipment, and relates to the technical field of laser display. According to the optical machine illumination system, the first face of the first prism is arranged to be the curved face, the first face is used for collecting the illumination light beam and adjusting the incident angle of the illumination light beam entering the second face to replace a lens, materials and space of the lens are saved, and the system size and the number of optical elements can be effectively reduced; and miniaturization of the equipment is facilitated. Meanwhile, by adding the second prism, the propagation path of the light beam is prolonged, so that the projection light beam and the non-projection light beam can be separated, and the contrast ratio is improved.

The invention provides fluorescent conversion type red fluorescent powder for display as well as a preparation method and application thereof, and belongs to the technical field of light-emitting display materials. Metal Sr, metal Al and metal Eu are mixed and smelted according to the stoichiometric ratio and then ground to prepare alloy powder, lithium aluminum hydride powder and the alloy powder are ground, mixed, calcined and ground again, and the red fluorescent powder for laser display with high brightness under blue light excitation is prepared. According to the invention, an alloying method is combined with a nitriding method, and the molar ratio (greater than 70%) of Eu < 2 + > (radiative transition) in all Eu elements in the prepared fluorescent powder product is greatly increased, so that the prepared red fluorescent powder has high color purity, high luminous efficiency and thermal stability, and meanwhile, a sample has an ultrahigh saturation threshold value under the excitation of blue laser; the material can be applied to a fluorescence conversion type laser display technology, and has huge potential for laser display devices.

The invention discloses a laser speckle testing device based on hyperspectral imaging, which realizes high-precision measurement of laser spots and speckle signals under the condition of not depending on an expensive refrigerating system by optimizing an optical structure and a control strategy. The device comprises an imaging lens, a lens electric control module, a liquid crystal tunable optical filter module, an ND filter wheel, a driving mechanism of the ND filter wheel, a two-dimensional image sensor, a main control unit, a three-axis acceleration sensor, a PC host and a tested screen. A noise calibration piece preset in an ND filter wheel is used for collecting noise data in real time before each time of measurement, and noise deduction is carried out before the filter is switched, so that the timeliness and accuracy of data correction are improved; meanwhile, the integrated three-axis acceleration sensor is used for monitoring vibration, and when vibration exceeding a preset threshold value is detected, it can be judged that currently collected data is invalid, and re-collection is automatically triggered. The device is compact in structure, low in cost and suitable for the fields of laser display, projection calibration, high-brightness light source detection and the like.

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 embodiment of the invention belongs to the laser display technology, and provides laser projection equipment, which comprises a laser light source, which comprises a plurality of laser arrays, each laser array comprises a plurality of lasers, and the plurality of lasers emit lasers with the same color; the light combining assembly is located on the light emitting side of the laser light source and used for combining laser emitted by the multiple laser arrays; the phase modulation element comprises a plurality of first target areas, the first target areas are used for changing the phases of the target light beams, and different first target areas change different phases of the target light beams; wherein the lasers with the same color in the target light beam cover the multiple first target areas, and the target light beam comprises lasers emitted by at least one of the multiple laser arrays and the light combining assembly. The laser of the same color in the target light beam is changed into the multi-phase light beam after being emitted through the multiple first target areas, so that the speckle phenomenon is effectively reduced, and the display effect of a projection picture is improved.

The invention discloses a multilayer optical film, a preparation method thereof and an imaging device. The preparation method comprises the following steps: providing an optical glass substrate, depositing an anti-reflection layer on the optical glass substrate, carrying out pattern design on the anti-reflection layer by using a beam splitting film design algorithm, and transferring a designed beam splitting pattern to the anti-reflection layer; depositing a high-damage-threshold protection layer on the anti-reflection layer, depositing a thermal management layer on the high-damage-threshold protection layer, depositing a reflection layer on the thermal management layer in an evaporation mode, forming a multi-layer film structure, carrying out annealing treatment on the formed multi-layer film structure, and setting the annealing condition as a preset temperature so as to improve the interface bonding force between the multi-layer film structure. Obtaining a multi-layer optical film; through the optimal design of the whole preparation process, the laser damage resistance is considered, the heat management layer provides heat stability, and the reflecting layer improves the efficiency of an optical system, so that the multi-layer optical film with high performance and multiple functions is manufactured, and the multi-layer optical film is suitable for high requirements of a laser display system.

The embodiment of the invention discloses a waveguide device and application thereof, and belongs to the technical field of waveguides, the device comprises a substrate layer and a waveguide layer superposed on the substrate layer, and the waveguide layer comprises a lower cladding, a core layer and an upper cladding which are superposed in sequence; wherein the core layer comprises an input section, an output section and arc turning sections located on the input section and the output section, a laser beam enters from the input section and exits from the output section, and the arc turning sections enable the laser beam to turn at a preset angle from the input direction to the output direction. Through plane integration and arc turning design, the occupied area of a silicon wafer is minimized, and miniaturized integration is realized; moreover, the laser beams are transmitted through the arc turning design, the silicon-based integration process is compatible, required elements are reduced, the assembly cost is reduced, and low-cost quantification of products is facilitated.

The invention belongs to the technical field of laser diode illumination and display, and particularly relates to a laser white light device for laser display and illumination and a preparation method thereof. Comprising a laser emission module and a fluorescence conversion module. The fluorescence conversion module comprises a pixelated transparent substrate, a green fluorescent powder unit and a red fluorescent powder unit; groove array structures which are arranged in a staggered mode are distributed on the upper side and the lower side of the pixelated transparent substrate respectively. The green fluorescent powder unit is arranged in the lower side groove array structure, and the red fluorescent powder unit is arranged in the upper side groove array structure; the laser emitting module emits laser from the lower portion of the pixelated transparent substrate to the upper portion, and the green fluorescent powder unit and the red fluorescent powder unit are excited to emit green light and red light respectively and then are fused to form white light. According to the invention, the heat dissipation performance of the fluorescence conversion module is improved, the reabsorption between red and green fluorescent powder is weakened, the luminous efficiency is improved, and a white light LD device with high brightness and high color rendering can be realized.

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 provides red nitride fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of rare earth luminescent materials. The chemical composition of the red nitride fluorescent powder is Sr2 [Mg < 1-x > Li < x > Al < 5-x > Si < x > N < 7 >]: yEu < 2 + >, x is greater than or equal to 0.001 and less than or equal to 0.50, and y is greater than or equal to 0.0005 and less than or equal to 0.20. The fluorescent powder is a nitride system, has strong light absorption when blue light is 400-500nm, has an excitation peak value of about 460nm, can be effectively excited by blue laser, can emit red fluorescence when being excited by blue light, has an emission peak value adjustable in a range of 635-685nm and a half-peak width adjustable in a range of 75-90nm, and has a good contribution to a high color gamut in a display device. When the fluorescent powder is used in various laser display devices taking blue light high-power laser as an excitation source, the fluorescent powder has the advantages of high luminance, high luminous efficiency and stable physical and chemical properties.

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 discloses a kind of laser speckle testing device based on hyperspectral imaging, which realizes high-precision measurement of laser spot and speckle signal under the condition of not relying on expensive refrigeration system by optimizing optical structure and control strategy.The device includes imaging lens, lens electric control module, liquid crystal tunable filter module, ND filter wheel and its driving mechanism, two-dimensional image sensor, main control unit, three-axis acceleration sensor, PC host and the screen to be measured.The noise calibration piece pre-stored in the ND filter wheel is used to collect noise data in real time before each measurement, and noise subtraction is carried out before the filter switching to improve the timeliness and accuracy of data correction;At the same time, the integrated three-axis acceleration sensor is used to monitor vibration, and when vibration exceeding the preset threshold is detected, it is determined that the current collected data is invalid and automatically triggers re-sampling.The application has compact structure and low cost, and is suitable for laser display, projection calibration and high-brightness light source detection and other fields.

The invention provides a magnesium-modified narrow-spectrum green luminescent material, a preparation method and application thereof, and a laser display device, and belongs to the technical field of luminescent materials. The magnesium modified narrow-spectrum green light-emitting material has excellent light-emitting performance, when x is equal to 0.2, the emission wavelength of the (Sr0. 8Mg0. 2) Ga2S4: 0.04 Eu < 2 + > narrow-spectrum green light-emitting material under excitation of 450 nm blue light is 537.7 nm, chromaticity coordinates are (0.2916, 0.6766), the half-peak width is 47 nm, and the external quantum efficiency reaches 53.1%, which obviously exceeds that of undoped modified SrGa2S4: Eu < 2 + > fluorescent powder (the external quantum efficiency is 33.1%). The liquid crystal display has important application prospects in wide-color-gamut liquid crystal display and laser display, and has important research significance and application value for promoting the development of high-end display (such as laser display).

A piezoelectric ceramic and its preparation method and application, which mainly relate to the field of piezoelectric ceramics. This method is different from the two-step sintering process of the traditional sintering process. By effectively controlling the changes in the sintering temperature and the holding time and the formula of the raw materials, the densification sintering of lead-free piezoelectric ceramics is achieved; the piezoelectric ceramic preparation method provided by the present application reduces the volatilization of alkali metal elements such as K and Na at high temperatures, which is conducive to the stability of the stoichiometric ratio of the formula and reduces the generation of impurities, thereby improving the density and process stability of the ceramics; the piezoelectric ceramics of the present application have high piezoelectric properties, density and mechanical properties, and are also environmentally friendly; the piezoelectric ceramics provided by the present invention have broad application prospects and can be applied to the optical fiber scanner in the field of laser display and configured as an actuating part. The actuating part uses the inverse piezoelectric effect of the piezoelectric ceramic to control the optical fiber on the actuating part to vibrate and scan, thereby realizing laser scanning imaging.

The invention discloses a wavelength detection method, system and device and a medium, and the method comprises the steps: enabling to-be-detected light to irradiate a holographic optical element HOE, and enabling the HOE to generate diffraction of different angles according to the wavelength of incident light; the detector is used for receiving the light rays diffracted by the HOE and sending the light rays to the detector, and the detector is used for receiving the light rays diffracted by the HOE and detecting the intensity distribution of the light rays diffracted by the HOE; and determining the wavelength of the light to be detected based on the intensity distribution of the light on the CCD. By adopting the HOE and CCD technologies, the high precision is successfully maintained, and meanwhile, the miniaturization of equipment and the effective control of the cost are realized. The small-sized high-precision spectrograph not only fills the deficiency of small-sized high-precision spectrographs in the market, but also can be applied to laser display and other accurate spectral measurement.

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.

The utility model provides a cooling liquid dispersing performance evaluation device, belongs to the technical field of machinery, and solves the problem that an existing cooling liquid detection evaluation device is inconvenient to detect. The device for evaluating the dispersion performance of the cooling liquid comprises a workbench, a magnetic stirrer is placed on the workbench, a row of sample pools are uniformly distributed on the magnetic stirrer, mixed liquid containing the cooling liquid is added into the sample pools, and the magnetic stirrer drives the mixed liquid in the sample pools to stir through magnetons; a laser emission window is arranged on the end face, facing the magnetic stirrer, of the laser emitter; a plurality of detection windows are formed in the end face, facing the magnetic stirrer, of the integrated detector, and one detection window can receive laser emitted by the laser emission window and penetrating through the sample pools; the display is located at one end of the magnetic stirrer, the display is communicated with the integrated sensor, and each detection window can feed back detected data to the display. The utility model has the characteristic of convenient operation.

A laser driver includes a pulse generator circuit, a pulse scaling circuit, and a power stage circuit. The pulse generator circuit generates a first voltage pulse of a first duration. The pulse scaling circuit includes a first transistor with a first gate electrode receiving the first voltage pulse, a capacitor having an electrode connected to a common terminal of a pair of resistors connected in series with the first transistor, and a second transistor with a second gate electrode connected to the first gate electrode and a second drain electrode coupled to a supply voltage via a resistor. Responsive to the reception of the first voltage pulse, a second voltage pulse of a second duration shorter than the first duration is generated at the second drain electrode. The power stage circuit converts the second voltage pulse into a current pulse driving at least one emission element of a laser display.

The application provides a red nitride fluorescent powder and a preparation method and application thereof, and belongs to the technical field of rare earth luminescent materials. 1‑x Li x Al 5‑x Si x N7]:yEu 2+ , wherein 0.001<=x<=0.50 and 0.0005<=y<=0.20. The fluorescent powder is a nitride system, has strong light absorption at blue light 400-500nm, has an excitation peak peak value at about 460nm, can be effectively excited by blue light laser, can emit red fluorescent light under blue light excitation, has an emission peak peak value at 635-685nm which can be adjusted, has a half peak width of 75-90nm which can be adjusted, and has a very good contribution to high color gamut in display devices. The fluorescent powder has the advantages of strong luminous brightness, high luminous efficiency and stable physical and chemical properties when used in various laser display devices with blue high-power laser as an excitation source.

An optical waveguide combiner with an output coupler comprising an array of embedded partially reflective dielectric mirrors that expand and couple a virtual (optionally, color) image generated by a laser display engine into a user EMB, wherein the dielectric mirrors are configured to have: a wavelength band for each laser emission band of the laser display engine, the wavelength band including wavelengths of light in the laser emission band and in a wavelength range in which the laser emission 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-through angular transmittance range having high transmittance for natural light incident on a facet.

The invention provides an all-fiber white light laser for laser display. The all-fiber white light laser comprises a blue light pumping source; the blue light pumping source is connected with the resonant cavity assembly through the multimode tail fiber; a gain optical fiber is arranged in the resonant cavity assembly; after the pumping blue light excites the gain optical fiber, red laser and green laser are generated at the same time, and the red laser and the green laser are synthesized into white laser in the multimode output optical fiber with the residual pumping blue light. According to the white light fiber laser, an all-fiber structure is achieved, mixed white light of RGB three primary colors is obtained through a single gain fiber, and the white light fiber laser has the advantages of being high in conversion efficiency, simple in structure, easy to miniaturize and the like.

A laser (800), a light source apparatus (10) and a laser projection device, belonging to the field of laser display. The laser (800) comprises: a light-emitting chip (801), a reflecting prism (802) and a collimating lens (803). The light-emitting chip (801) is used for emitting laser light in a third direction (Z), the angle of divergence of the laser light in a first direction (X) being smaller than the angle of divergence of the laser light in a second direction (Y), and the first direction (X), the second direction (Y) and the third direction (Z) being perpendicular to each other. The reflecting prism (802) has a reflecting surface (SR), the reflecting surface (SR) being located on a light-emitting side of the light-emitting chip (801). The collimating lens (803) has a light incident surface (S1) and a light-emitting surface (S2), the reflecting prism (802) being used for reflecting the laser light to the light incident surface (S1) of the collimating lens (803). At least one of the reflecting surface (SR) and the light incident surface (S1) is a target curved surface, the target curved surface being used for reducing the difference between the angle of divergence of the laser light in the first direction (X) and the angle of divergence of the laser light in the second direction (Y). Adjusting the angles of divergence of the laser light in the first direction (X) and in the second direction (Y) renders energy distribution uniform, improving the display effect of projected pictures.

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 invention discloses a reflective annular color wheel for laser display. The reflective annular color wheel comprises an outer annular fluorescent material and an inner annular fluorescent material, wherein the bottom of the outer annular fluorescent material and the bottom of the inner annular fluorescent material are connected with the reflecting substrate through the transparent connecting layer. According to the color wheel, the splicing angle does not need to be designed, the production process is simplified, the light spot effect caused by splicing seams is avoided, laser irradiation is more uniform, and therefore the overall color temperature stability is improved; the color wheel can bear blue light excitation power as high as 60W / mm < 2 >, still keeps relatively low color temperature drift, shows good light quenching resistance and thermal stability, overcomes the defects of speckles, poor effect, unstable chromaticity and the like in the prior art, and is suitable for a laser illumination system with high power density.

The embodiment of the invention belongs to the laser display technology, and provides a laser and a display device, and the laser comprises a light-emitting chip which emits laser in a third direction, and the diffusion angle of the laser in a first direction is smaller than the diffusion angle of the laser in a second direction; the reflecting prism comprises a reflecting surface and reflects the laser to the collimating lens; the collimating lens comprises a light incident surface and a light emergent surface, the light emergent surface is a curved surface, and the laser is collimated and emitted in the first direction and the second direction; the target surface is a curved surface and is used for enabling the diffusion angle of the light beam emitted from the target surface in the first direction to be larger than the diffusion angle of the light beam irradiated on the target surface in the first direction and / or enabling the diffusion angle of the light beam emitted from the target surface in the second direction to be smaller than the diffusion angle of the light beam irradiated on the target surface in the second direction; and the target surface comprises a reflecting surface of the reflecting prism and / or a light incident surface of the collimating lens. The diffusion angles of the laser in the first direction and the second direction are adjusted, so that energy distribution is uniform, and the display effect of a projection picture is improved.

The invention discloses a high-saturation-threshold and high-luminous-efficiency composite fluorescent material for laser display and a preparation method of the high-saturation-threshold and high-luminous-efficiency composite fluorescent material. The composite fluorescent material comprises a sapphire substrate, and a conical array microstructure is etched on the surface of the sapphire substrate by adopting a photoetching-inductively coupled plasma process and is used for improving the light extraction efficiency; the inorganic silica gel fluorescent powder is filled in the microstructure and is used for reducing total reflection; the sapphire substrate and the inorganic silica gel fluorescent powder form the composite fluorescent material through low-temperature curing. The composite fluorescent material disclosed by the invention can bear the excitation power density of 40W / mm < 2 >-50W / mm < 2 > and the luminous efficiency of 240-260lm / W under the excitation of blue light LD with the wavelength of 450nm.

The invention provides a laser display device, and relates to the technical field of laser display. The laser display device comprises a light source part, a light transmitting part and a light modulation part, the light source component is configured to emit laser with at least one color, and the laser reaches the light modulation component after passing through the light transmitting component; the light transmitting component is arranged between the light source component and the light modulation component, the light transmitting component is configured to receive incident light in different directions, emergent light comprises first polarized light and second polarized light, and the first polarized light is perpendicular to the second polarized light; the proportions of the first polarized light and the second polarized light of the emergent light corresponding to the incident light in different directions are different; and the light modulation component is configured to modulate the received light beam to obtain the light beam with the to-be-displayed image information. The invention is used for providing a new speckle improvement scheme suitable for the laser display device.