7results about How to "Increase refraction" patented technology

This invention provides a compound for use in organic electroluminescent devices and its application, the compound having the structure shown in formula (I): L, L 1 L 2 Each is independently selected from single-bonded, substituted or unsubstituted C6-C30 arylene or substituted or unsubstituted C3-C30 heteroarylene; Ar 1 -Ar 2 Each is independently a substituted or unsubstituted C6-C30 aryl group or a substituted or unsubstituted C3-C30 heteroaryl group; X 1 ~X 11 Each independently selected from CR 1 Or N, the R 1 Each is independently selected from one of the following: hydrogen, cyano, nitro, hydroxyl, substituted or unsubstituted C1-C20 chain alkyl, C3-C20 cycloalkyl, C1-C20 alkoxy, C1-C20 silyl, C6-C60 aryl, and C3-C60 heteroaryl, wherein R 1 Each of the substituted or unsubstituted groups can be independently and optionally linked to form a ring; when the above-mentioned substituted or unsubstituted groups have substituents, the substituents are selected from one or more combinations of halogens, C1-C20 chain alkyl, C3-C20 cycloalkyl, C1-C20 alkoxy, C1-C20 thioalkoxy, C1-C20 silyl, cyano, nitro, hydroxyl, C6-C60 aryl, and C3-C60 heteroaryl.

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 application discloses a preparation method of a high-strength flexible self-supporting hydrophobic electromagnetic shielding film, which comprises the following steps: weighing a certain amount of carbon titanium-aluminum, slowly adding the carbon titanium-aluminum into a lithium fluoride / hydrochloric acid etching solution, magnetically stirring in a water bath at a certain temperature for a period of time, obtaining an etched carbon titanium-aluminum dispersion liquid, carrying out acid pickling on the carbon titanium-aluminum dispersion liquid by using dilute hydrochloric acid, and then washing the carbon titanium-aluminum dispersion liquid until neutral, so as to obtain multi-layer titanium carbide; carrying out ultrasonic treatment on the multi-layer titanium carbide, so as to obtain few-layer titanium carbide; mixing the prepared few-layer titanium carbide and bacterial cellulose with nano-iron oxide respectively; alternately performing vacuum filtration on the mixed solutions of bacterial cellulose / nano-iron oxide and few-layer titanium carbide / nano-iron oxide; and naturally airing the obtained film at room temperature. Finally, methyltrimethoxysilane is deposited on the surface of the film to form a hydrophobic network. The film prepared by the method has the characteristics of good flexibility, high electromagnetic shielding performance and high mechanical strength.

The utility model discloses a motorcycle steering lamp structure, including the lamp shell and the lamp pearl, the inside of lamp shell is provided with the circuit board, and the top of lamp shell is provided with the lamp shade, the surface of circuit board is provided with the lamp pearl, and one side of lamp shell is provided with the steering pole, the utility model discloses a double fixed structure through bolt and elastic buckle, has realized the firm connection of lamp shade and lamp shell, has guaranteed the stability of steering lamp under complex road condition, and the lamp shade and lamp shell installation disassembly are more convenient further, through the cooperation of the plug -in pole in lamp shell and the plug -in barrel on the circuit board, make the circuit board can accurate installation in lamp shell, has guaranteed the stability of circuit connection, through the reflection of the light -reflecting part can effectively reflect the ambient light, even if the steering lamp is not opened, also can through the reflection car headlamp, street lamp etc. Light, make the motorcycle contour more clear, remind other road user's attention, through the good refraction and dispersion effect of arc lamp shade to light, has improved the visibility of the steering signal significantly.

This invention relates to the field of optical lens technology, and more particularly to an optical system for a large-aperture full-frame fixed-focus lens. It includes a first objective lens group, a second objective lens group, and a third objective lens group arranged sequentially from the object side to the image side along the optical axis. The third objective lens group includes an aperture stop. During focusing, the second objective lens group moves along the optical axis to the image side, while the positions of the first objective lens group, the aperture stop, and the third objective lens group relative to the image plane remain unchanged. This invention's optical system for a large-aperture full-frame fixed-focus lens optimizes light refraction and convergence, balances aberrations, and improves image quality by setting the positive and negative optical powers of each lens group and the ratio between the combined focal length of each lens group and the combined focal length of the entire lens. This further enables the lens to achieve higher image quality.

This invention belongs to the field of electromagnetic wave absorbing materials technology, specifically relating to a nickel-boron-doped cobalt-based layered carbon absorbing material and its preparation method. This invention utilizes a cobalt-based boron imidazole precursor framework as a template, and forms a two-dimensional layered layered double hydroxide (LDH) through a chemical oxidation etching process using nickel ions. This LDH is then subjected to high-temperature reduction to obtain the nickel-boron-doped cobalt-based layered carbon material. This material leverages the unique properties of two-dimensional materials to achieve high impedance matching, allowing electromagnetic waves to enter the absorber at a significant rate. Furthermore, the material's excellent dielectric polarization and magnetic coupling attenuate the electromagnetic waves entering the absorber. The material achieves a minimum reflection loss of -60.1 dB and a maximum effective absorption bandwidth of 6.24 GHz, giving it excellent electromagnetic wave absorption capabilities. The preparation method of this invention is simple and easy to mass-produce.

The application provides a solar cell, a photovoltaic module and a photovoltaic system. The solar cell comprises: a solar cell body; a sub-wavelength nano light-trapping layer formed on at least part of the surface of the solar cell body, wherein the at least part of the surface comprises one or more of a front surface, a back surface and a side surface; the sub-wavelength nano light-trapping layer comprises a plurality of light-trapping structures; the width of the gap between adjacent light-trapping structures changes in the direction away from the substrate of the solar cell body; the sub-wavelength nano layer can be prepared on the front surface, the back surface and the side surface of the solar cell, so that the incident light is subjected to multiple reflections and refractions, the propagation path of the light is prolonged, the light absorption rate is improved, and the light utilization rate is improved.