Boe Technology Group Co., Ltd.

Beijing Information Science & Technology University

Hefei Boe Optoelectronics Technology Co., Ltd.

Nec (china) Co., Ltd.

Beijing Microlive Vision Technology Co., Ltd

Chengdu Boe Display Sci-tech Co., Ltd.

Lei Qin

Likun Wang

Chao Zhong

Shuai Li

Feng Wang

Yuting Zhang

Wei Zeng

Jie Ling

Guoyi Liu

Ran Jiang

Lei Hua

Hongming Zhang

Shaopeng Tang

Yong Zeng

Yufeng Bao

Qingyuan Wang

Xiaohua Lin

Junbo Jia

Zhoushuo Chu

Yanxue Zhang

Yanru Guo

Zeyu Qu

Zhonglin Li

Qingming Huang

An underwater wireless charging method and device using acoustic waves for covering the entire depth of sea is disclosed. Within 10 meters below the water-level, unmanned undersea vehicles (UUV) are charged from a mother ship. Between 10 meters and 100 meters below the water-level, a sound wave is directly sent from the mother ship to the underwater sensor to be charged. At the depth of more than 100 meters below the water-level, an underwater UUV is adopted to in situ charge the underwater sensor node at close range. The transmitting transducer converts electrical energy to sound energy through the inverse piezoelectric effect. The sound wave is then sent by the transducer to a hydrophone that transforms sound energy to electrical energy via the piezoelectric effect. The load can thus be charged. Three types of wireless charging can be realized by the station for different underwater application scenarios, so as to satisfy the wireless charging for covering the entire depth of sea.

Acoustic wave-based full-sea-depth-covering undersea wireless charging method and device

Provided is a curved liquid crystal display panel, including a color film substrate and an array substrate. An orthographic projection of the color film substrate on the array substrate is within the array substrate. The color film substrate includes a first side surface and a second side surface. The array substrate includes a third side surface and a fourth side surface. The first side surface is adjacent to and staggered from the third side surface. The second side surface is adjacent to and staggered from the fourth side surface. At positions where the third side surface and the fourth side surface are disposed, each of a side, proximal to the color film substrate, of the array substrate and a side, distal from the color film substrate, of the array substrate includes a structure formed by a grinding process.

Curved liquid crystal display panel and curved display device

A pixel drive circuit, a drive method thereof and a display device are provided. The pixel drive circuit includes a writing sub-circuit, an amplification sub-circuit, and a drive sub-circuit, writing sub-circuit is configured to transmit a data voltage provided by a signal input terminal to the amplification sub-circuit under control of the scan signal terminal; the amplification sub-circuit is configured to generate an amplification electrical signal according to the data voltage and output the amplification electrical signal to a drive sub-circuit, the drive sub-circuit is configured to obtain the data voltage based on the amplification electrical signal output by the amplification sub-circuit and provide a drive current to a light-emitting device under control of the data voltage, and the light-emitting device is configured to emit light according to the drive current output by the drive sub-circuit.

Pixel drive circuit and drive method thereof, and display device

A shear vibration-based piezoelectric composite material and a preparation method thereof are disclosed. The piezoelectric composite material includes a piezoelectric material and the passive material. The piezoelectric material includes a piezoelectric material polarized along the x-axis positive and a piezoelectric material negatively polarized along the x-axis. The piezoelectric materials in the two polarization directions are alternately arranged along the x-axis direction. The passive material includes a filling layer, a transition layer, and a planar layer. The filling layer is disposed between every two adjacent piezoelectric materials. The planar layer is located outer two surfaces perpendicular to the z-axis of the piezoelectric material. The planar layer on one side is fixedly connected to the filling layer in the odd-numbered position via the transition layer. The planar layer on the other side is fixedly connected to the filling layer in the even-numbered position via the transition layer. The piezoelectric composite material can be used to prepare an underwater acoustic transducer, a hydrophone, piezoelectric energy harvesters, and the like. The invention innovatively converts shear vibrations into the thickness vibrations of the upper and lower surfaces of the composite material, thereby improving the performance of the composite material.

Shear vibration-based piezoelectric composite material and preparation method thereof

Disclosed are a video content push method and apparatus, the method comprising: when a primary disaster recovery system of a video recommendation service fails, activating a standby disaster recovery system; receiving a video access request sent by an application client, and invoking first historical video content stored in middleware and obtained from historical video recommendations of the video recommendation service according to a preset proportion; pushing the first historical video content to the application client for playback. The method removes the dependence of recovery on other services, so that a recovery solution is more robust, thereby increasing the stability of video content pushing.

Method and apparatus for pushing video content

A method and device for extracting color features, relating to the field of image processing includes converting an original image into sub-images corresponding to channels in a color space, dividing the sub-images into a plurality of cells with identical size, and calculating the color histograms of each of the plurality of cells. A cell and neighboring cells thereof are defined as the effective scope of the cell, and a feature vector of the cell is determined according to a degree of similarity of the color histograms of every two neighboring cells in the effective scope. The feature vectors of the cells in the sub-images are concatenated to obtain feature vectors of the sub-images, and a feature vector of the original image is obtained according to the feature vectors of the sub-images.

Method and a device for extracting color features

Growing community of inventors

Beijing, China

Lei Qin