Huawei Technologies Co., Limited

Appotronics Corporation Limited

Autel Robotics Co., Ltd.

Zte Corporation

Tencent Technology (shenzhen) Company Limited

Huawei Technologies,co., Ltd.

International Business Machines Corporation

Chinese Academy of Sciences

Xi'an Zhongxing New Software Co., Ltd.

Infinitus (china) Company Ltd.

Raytech Optical (changzhou) Co., Ltd.

Johnson Electric S.a.

Aac Optics (suzhou) Co., Ltd.

Nankai University

Changzhou Raytech Optronics Co., Ltd.

Wei Sun

Zhiheng Guo

Xinqian Xie

Lin Wang

Fei Hu

Yi Li

Yongqiang Fei

Yongxia Lyu

Dongdong Luo

Hailang Zhang

Lei Wan

Xingqing Cheng

Xiaofeng Tang

Lei Zheng

Bin Zheng

Jie Wang

Yiting Yang

Shijie Li

Shuo Liu

Yulin Cao

Hongxiu Zhang

Shixiang Cheng

Chungwah Ma

Yan Xia

Haiyuan Guo

Hujie Luo

Haiyan Ou

Bo Gao

Lei Guan

Zhen Zhang

Zhi Hu Wang

Hui Huang

Wen Zhang

Yongxia Lv

Feng Liu

Zhenshan Zhao

Ping Li

Jing Liu

Jing Jing Liu

Liang Liang Fan

Chang Jie Guo

Xijun Yan

Peng Liu

Shunnan Zhang

Naifeng Wu

Hongjie Zhang

Bo Yuan

Wensheng Zhang

Xiaohui Ma

Zhengliang Ye

Chuan Hui Fang

Wen Hao An

Rong Zhang

Lihong Zhou

Ronghui Wen

Feng Xue

Daniel Cohen-Or

Wenbing Su

Hai'ou Dong

Yidong Chen

Zhengwei Han

Minglun Gong

Jian Meng

Hua Yang

Lanlan Zhang

Shihao Wu

Xiao Hong Ye

Daqing Fang

Deping Zhang

Dingxiang Tang

Chenming Li

Bowen Li

Kejian Cui

Pinxin Long

Oliver Martin Deussen

Xiangwen Wu

Yiyun Bao

Huayi Lu

Lianshan Zhao

Xin Qiu

Zeda Tang

Chen Wang

Qinglu Guo

Shoufei Zhu

Huawei Liu

Ling Dang

Xinyu Zhang

Wentao Li

Mingyao Huang

Lianwen Qi

Fenglian Zhang

Minchao Qi

JunXing Yang

Zhexuan Yang

XueJun Zhong

Jing Yu

ZhiXia Wang

A propeller, a propeller kit, a power assembly, a power kit and an unmanned aerial vehicle (UAV). The propeller includes a hub and at least two blades connected to the hub. The hub is detachably mounted on a corresponding drive apparatus by a mounting member corresponding to the hub, so that the propeller is mounted on the corresponding drive apparatus. A surface, facing the mounting member, of the hub is provided with a first fitting portion. A surface, facing the hub, of the mounting member is provided with a second fitting portion corresponding to the first fitting portion. The first fitting portion matches the second fitting portion. In the foregoing manner, a user can be prevented from incorrectly mounting a forward propeller and a counter-rotating propeller during the use of a quick-detachable propeller in the embodiments of the present application.

Propeller, propeller kit, power assembly, power kit and unmanned aerial vehicle

The present invention relates to cyclopropane skeleton monophosphine ligands and preparation methods for palladium complexes thereof and an application. Specifically, trans-diaryl substituted cyclopropane skeleton monophosphine ligands are synthesized after trans-1,2-diaryl ethylene undergoing the steps of cyclopropanation reaction, debromination reaction, substitution reaction, and the like. Palladium complexes prepared by coordinating the cyclopropane skeleton monophosphine ligands with a palladium salt show very high activity in catalyzing C—N bond coupling reactions, and have good application prospects.

Cyclopropane skeleton monophosphine ligands, palladium complexes thereof, preparation methods and application

A projection screen, with a design in which the apexes of multiple triangular pyramidal units of the projection screen in an array arrangement change gradually according to a predetermined relation, an image light shone from a projector is reflected by a microstructure layer having the triangular pyramidal units and then converged in a range centered around the human eyes, so as to reduce the degree of difference in brightness at different viewing positions, thus ensuring that the projection screen is provided with excellent uniformity and high gain.

Projection screen

This application discloses a virtual map switching method in a virtual game environment performed at a computer device. The method includes: obtaining a travel position of a first virtual racing car in a first virtual map in a racing game, the first virtual racing car being controlled by a first player of the racing game; and teleporting the first virtual racing car from the first virtual map to a second virtual map in the racing game when the travel position of the first virtual racing car reaches a first teleporter that connects the first virtual map to the second virtual map.

Map switching method and apparatus, storage medium, and device

An LED display screen, comprising: an LED array, consisting of multiple LED light-emitting units and used for emitting a light; an optical diffusion film, provided at a light exit side of the LED array; a matrix shading frame, comprising multiple hollow shading gratings, the hollow shading gratings corresponding one-to-one to the LED light-emitting units; and a substrate, used for supporting the LED array and the matrix shading frame, where the light emitted by the LED light-emitting units, after running through the hollow shading gratings, is diffused to a viewer side via the optical diffusion film, and the LED light-emitting units emit the light towards the hollow shading gratings.

LED display screen

The present application provides a projection screen and a projection system. The projection screen includes an optical structure layer and a reflective layer, where the optical structure layer includes a plurality of microstructure units; each of the plurality of microstructure units include a first sidewall and second sidewalls; the reflective layer covers at least part of the first sidewall to form a first working surface, and the reflective layer covers at least part of the second sidewalls to form second working surfaces, respectively; the first working surface deflects an input image beam, and at least part of the input image beam is transmitted to viewer's field and the second working surfaces; and the second working surfaces deflect an input image beam came from the first working surface, and the input image beam came from the first working surface is transmitted to the viewer's field. The present application improves the brightness evenness of the projection screen.

Projection screen and projection system

Embodiments of the present application relate to the technical field of propellers, and particularly to a folding propeller, a power component and an unmanned aerial vehicle. The folding propeller includes a hub, at least two blades and at least two connecting pieces, the hub being configured to mount the folding propeller to a driving device. The hub includes a first surface and a second surface disposed oppositely, the first surface facing the driving device, and the second surface facing away from the driving device. Each of the blades is mounted on the second surface by the corresponding connecting piece, and each of the blades is capable of rotating relative to the hub. In the above manner, according to the embodiments of the present application, during mold adjustment in injection molding, a rotary damping between the blade and the hub can be adjusted by only adjusting the friction force of one contact surface, which is convenient for mold adjustment, is beneficial to mass production and reduces the production cost.

Folding propeller, power component and unmanned aerial vehicle

A wire grid structure and a manufacturing method therefor, and a projection screen are provided. The manufacturing method includes: extruding a molten mixed material body in a melt extruder to a casting roll to form a casting piece; patterning the casting piece by means of an impression roll to form a precursor having a preset wire grid structure pattern, where the precursor is wound on the impression roll and has a first dimension in a height direction; stretching the precursor by a first group of stretching rolls and a second group of stretching rolls in two opposite directions along a direction perpendicular to the height direction to form the wire grid structure, a preset distance being configured between the first group of stretching rolls and the second group of stretching rolls. The wire grid structure has a second dimension in the height direction that is greater than the second dimension.

Wire grid structure and manufacturing method therefor, and projection screen

The present disclosure provides a camera optical lens including, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; wherein the first lens has a positive refractive power, and the camera optical lens satisfies conditions of: 0.95≤f/TTL; 3.50≤f2/f≤5.50; and 2.50≤(R11+R12)/(R11−R12)≤15.00. The camera optical lens can achieve good optical performance while meeting the design requirements for long focal length and ultra-thinness.

Camera optical lens

An apparatus determines a timing offset of a first carrier and a second carrier. The timing offset is an offset between timing of downlink communication of the first carrier and timing of uplink communication of the second carrier. The first carrier is a carrier using a first radio access technology (RAT), and the second carrier is an uplink frequency division duplex (FDD) carrier using the first RAT and a second RAT. The apparatus sends first indication information to a terminal. The first indication information indicates the timing offset, and the timing offset is used to determine the timing of the second carrier.

Communication method, access network device, and terminal

A projection screen includes an optical collimating layer and a surface diffusion layer which are arranged in sequence. A grating absorption layer for absorbing ambient light from various directions except a projection light direction is also provided between the optical collimating layer and the surface diffusion layer. The grating absorption layer includes a plurality of light-absorption ring-shaped units with different radii. The plurality of light-absorption ring-shaped units are arranged in a concentric ring. Each of the light-absorption ring-shaped units consists of a plurality of gratings arranged in the circumferential direction of the concentric ring. By taking a vertical symmetrical center line of the projection screen as a center, in a direction extending along the circumferential direction of the concentric ring to the left side and the right side of the projection screen, the distance between two adjacent gratings in the same light-absorption ring-shaped unit gradually increases.

A method for manufacturing a projection screen and a projection screen are provided. The method includes: preparing a substrate; under a first preparation condition, forming a reflective layer by vacuum plating above the substrate; and under a second preparation condition, forming a diffusion layer by the vacuum plating on the reflective layer. The second preparation condition is different from the first preparation condition, and a sputtering power in the second preparation condition is higher than a sputtering power in the first preparation condition.

Method for manufacturing projection screen and projection screen

A projection screen and a projection system using the projection screen. The projection screen includes a microstructure layer and a light absorbing layer sequentially stacked from the side where a projected light is introduced. The microstructure layer includes multiple microstructure units. Each microstructure unit includes one reflective surface and one lens surface opposite the reflective surface; moreover, the reflective surface is provided at a position matching the focus of the lens surface. The projection screen and the projection system can resist ambient light and have a high gain and a high contrast.

A projection screen and a processing method therefor, wherein the projection screen comprises, in sequence from the incident side of projection light, a diffusion layer, a microlens array and a substrate. The inner side of the substrate is provided with a Fresnel microstructure, and part of the surface of the Fresnel microstructure is provided with a reflecting layer while the remaining part of the surface is a light absorbing layer. The microlens array is used for focusing the projection light on the reflecting layer. The reflecting layer is used for reflecting projection light back to the field of view of viewers. Ambient light is mostly absorbed by the light absorbing layer. The settings of the structure and dimension of the microlens array enable the projection light to be only incident onto the reflecting layer of the Fresnel microstructure and the ambient light to be mostly absorbed by the light absorbing layer.

Projection screen and processing method therefor

A projection screen includes a substrate with a first substrate surface. The first substrate surface includes a first region and a second region adjacent to the first region. Multiple first wire grid bodies extending in a first direction are provided in the first region. Multiple second wire grid bodies extending in the first direction are provided in the second region. Each first wire grid body includes a first contact surface connected to the substrate and a first surface, and a first angle is formed therebetween. The first angles gradually decrease in a direction from the first region to the second region. Each second wire grid body includes a second contact surface connected to the substrate and a third surface, and a third angle is formed therebetween. The third angles gradually increase in a direction from the first region to the second region.

Growing community of inventors

Shenzhen, China

Wei Sun