11results about How to "Improve optical efficiency" patented technology

The invention discloses a diffractive optical waveguide and a preparation method thereof, and a head-mounted display device, and relates to the technical field of augmented reality, and the preparation method of the diffractive optical waveguide comprises the steps: obtaining a target eye box range adaptive to a target crowd; according to the human eye parameters of each user group in the target group, splitting the target eye box range to obtain sub-eye box ranges adapted to each user group; diffractive optical waveguides adapted to the user groups are prepared based on the sub-eye box ranges, and the area of a coupled-out grating in each diffractive optical waveguide is smaller than the area of a coupled-out grating of an optical waveguide designed for covering the target eye box range. The optical efficiency and uniformity of the diffractive optical waveguide can be ensured, and the diffractive optical waveguide is prevented from generating obvious rainbow lines, so that the use experience of a user is improved.

The application discloses a front light guide plate for a reflective display device and a manufacturing method thereof, comprising a light guide plate body with an incident light surface and an exit light surface oppositely arranged; a plurality of light guide dots formed on the exit light surface for guiding light from the incident light surface to a display surface of the reflective display device; wherein the light guide dots are conical or pyramidal; when the light guide dots are conical, the ratio of the bottom width A to the depth B is less than 0.1; when the light guide dots are pyramidal, the included angle between the inclined surface and the bottom surface is between 55 degrees and 70 degrees. The application optimizes the shape parameters of the dots, so that the light is more efficiently guided to the display surface, thereby significantly improving the overall display brightness under the same light source conditions.

The utility model belongs to solar heating technology field, specifically disclose a box body light -concentrating type solar medium temperature heat collector, the utility model discloses a sealed box body of one side glass cover, the bottom and the side surface of box body are equipped with heat preservation layer, be equipped with upper flow collecting pipe and lower flow collecting pipe in the box body, be equipped with at least two fin heat absorption unit between heat preservation layer and glass cover, the both ends of fin heat absorption unit are connected with the upper flow collecting pipe and lower flow collecting pipe of the intercommunication box body respectively, fin heat absorption unit includes fin adsorption pipe and reflector, and fin adsorption pipe sets up at the light -concentration of reflector surface. The utility model discloses the synergistic effect of metal light -concentrating structure and straight -through type flow channel design, can realize the stable output of medium temperature, improve the pressure intensity of system output, improved the reliability of medium temperature pressure bearing. The utility model can be widely applied to the light -heat conversion field of solar energy.

The utility model relates to optical and photovoltaic technical field, concretely is a kind of high-power condensing photovoltaic device based on toughened glass fresnel lens, comprising: toughened glass fresnel lens, adopt sodium calcium super white glass double-sided toughened and become, one side surface is set as smooth surface, the other side surface is formed through heating mould pressing and is formed with fresnel, realize high-power condensing through fresnel, photovoltaic chip is used to accept the sunlight focused by toughened glass fresnel lens, and power is exported through wire.The utility model solves the pain point that traditional lens weatherability is poor, glass lens weight is big, can replace silicon wafer, acrylic lens, is convenient for maintenance and use, greatly improves the optical efficiency and energy density of condensing photovoltaic system, can also be used for lighting, aviation, aerospace field.

The invention discloses a metasurface integrated Micro-LED structure with light beam shaping and light extraction enhancing functions, the structure comprises a Micro-LED chip and a single-layer metasurface structure directly integrated on the light emitting surface of the Micro-LED chip, and the metasurface is composed of a plurality of sub-wavelength nano units arranged in a two-dimensional array. Wherein the sizes and the space periods of the nano units are cooperatively designed according to the light-emitting center wavelength of the Micro-LED, the distance from a light-emitting layer in the chip to a light-emitting surface and a preset deflection angle of a light beam, so that phase delay values introduced by the units jointly form a composite two-dimensional phase distribution. According to the phase distribution, firstly, divergent spherical wavefront is reconstructed into collimated wavefront by compensating an optical path difference so as to enhance light extraction, and secondly, a linear phase gradient is superposed so that an optical axis of a whole outgoing beam generates a preset deflection angle. According to the invention, the functions of a complex optical system are integrated on a chip layer, and the integration of efficient collimation, directional emission and light extraction enhancement of light beams is realized.

The application provides a kind of circular arc secondary mirror design method and contain circular arc secondary mirror's slot type light-gathering heat collection system, belong to solar light-gathering heat collection technical field. In order to solve the existing secondary reflection slot type light-gathering system's parabolic surface type, composite parabolic surface type and flat plate type curve structure complex, it is easy to cause light-gathering effect to be poor due to processing error;Secondary reflection mirror installation and use will cause the defocusing phenomenon caused by mirror shape error and tracking error to cause the deflection of incidence angle, affect light-gathering effect problem. The application is by installing a kind of circular arc secondary mirror, and the radius, position and width of circular arc secondary mirror are calculated, to ensure that the reflected light through the secondary mirror is maximized to irradiate on the heat collecting tube, to improve the optical efficiency while reducing the processing difficulty.

The color car lamp projection module comprises a PCBA board, a radiator, a color wheel assembly, a lens support assembly and a lens, a light source is arranged on the light emitting side of the PCBA board, the radiator is connected with the PCBA board, corresponding installation through holes are formed in the radiator and the PCBA board, one end of the color wheel assembly penetrates through the installation through holes to be fixed to the back face of the radiator, and the other end of the color wheel assembly penetrates through the lens support assembly to be fixed to the lens support assembly. The color wheel assembly comprises a color wheel, a color wheel motor, a motor support, a color wheel shaft and a color wheel support, one end of the color wheel shaft is connected with the color wheel, the other end of the color wheel shaft penetrates through the motor support to be connected with a motor shaft of the color wheel motor installed on the color wheel shaft, and the motor support is connected with the radiator through the color wheel support. The lens support assembly is arranged on the light emitting side of the PCBA board, the lens is arranged at one end of the lens support assembly, and light emitted by the light source completely covers a light inlet of the lens after passing through the light cone range boundary of the color wheel. Radiating fins and a fan are arranged on the back surface of the radiator; and a strong convection area of the fan covers the light source and the radiating surface of the color wheel assembly.

The invention discloses a projection optical system and laser projection equipment. The projection optical system comprises a projection light source, a first illumination light path, a phase light modulation device, an optical coupling array, a second illumination light path, a display device and a lens. A laser light source emitted by the projection light source is shaped by the first illumination light path and then enters the phase light modulator for phase modulation, a modulated diffracted light beam enters the light coupling array, and the light coupling array not only can couple primary-order diffracted light into the second illumination light path, but also can couple secondary-order diffracted light into the second illumination light path. In addition, at least one level of high-order diffraction light can be coupled into a second illumination light path, so that more diffraction light can be used for a subsequent imaging light path, and the optical efficiency is improved. The energy distribution of the diffracted light beam entering the second illumination light path is modulated according to the brightness distribution of the to-be-displayed image, and after amplitude modulation is carried out through the display device, the brightness-darkness contrast in the displayed image can be remarkably improved, and the display requirement of HDR is met.

This invention provides a carbazole compound and its organic electroluminescent device, specifically relating to the field of organic optoelectronic materials technology. When used as the host material of the emitting layer in an organic light-emitting device, the compound of this invention can improve the mobility of charged holes in the host material, enhancing the exciton recombination effect; simultaneously, it achieves efficient energy transfer from the host material to the doped material, and limits energy loss caused by energy backflow or exciton diffusion, thus improving the device's light-emitting performance. The compound of this invention exhibits good film-forming properties and thermal stability. When used as a capping layer, it can improve optical efficiency and reduce light loss reflected by nearby electrodes during emission, thereby improving device performance. The preparation method of the compound of this invention is simple, the raw materials are readily available, and it can be widely applied in fields such as organic thin-film transistors and panel displays, showing good application effects and industrialization prospects.

The invention relates to the technical field of semiconductor display, in particular to a novel collimation high-brightness backlight module. The backlight module comprises a light guide plate, a light source, a reflecting film and an optical laminated layer arranged on the light-emitting surface of the light guide plate. The light-emitting surface of the light guide plate is provided with a continuous columnar curved surface microstructure, and the lattice point surface is provided with triangular prism lattice point structures arranged according to a specific rule. The core of the invention is that the optical laminated layer comprises at least four prism film layers, the prism extension directions of at least two of the film layers are orthogonally arranged, and multi-stage beam splitting and precise collimation are performed on light through the synergistic effect of the light guide plate microstructure and the plurality of orthogonal prism film layers. On the premise that brightness is not obviously sacrificed, the visual angle of emergent light rays can be greatly contracted in the horizontal direction and the vertical direction at the same time, the excellent all-dimensional peep-proof effect is achieved, the structure is compact, and the side-in type display device is particularly suitable for side-in type display equipment with high requirements for privacy protection and lightening and thinning.

The present application provides a light source device and a manufacturing method thereof. The light source device includes a micro light emitting element layer, a light-transmitting substrate, and a wavelength conversion module. The wavelength conversion module includes a first wavelength conversion layer, a second wavelength conversion layer, a light-transmitting layer, a plurality of isolation structures, a plurality of reflective layers, and a light-cutting layer. The first wavelength conversion layer, the second wavelength conversion layer, and the light-transmitting layer are arranged at intervals in an arrangement direction of the light-transmitting substrate. Any two of the first wavelength conversion layer, the second wavelength conversion layer, and the light-transmitting layer are separated from each other by the isolation structure. The reflective layer is located between any one of a side wall of the first wavelength conversion layer, a side wall of the second wavelength conversion layer, and a side wall of the light-transmitting layer and the isolation structure in the arrangement direction. The light source device has good optical efficiency.