Aac Kaitai Technologies (wuhan) Co., Ltd

Hon Hai Precision Industry Co., Ltd.

Hong-fu Jin Precision Industry (shenzhen) Co., Ltd.

Tencent Technology (shenzhen) Company Limited

Aac Acoustic Technologies (shenzhen) Co., Ltd.

Huawei Technologies Co., Limited

Other

Lifetech Scientific (shenzhen) Co., Ltd

Zte Corporation

Tsinghua University

Aac Technologies Pte. Ltd.

Ubtech Robotics Corp Ltd

Aac Microtech (changzhou) Co, , Ltd.

Scienbizip Consulting(shenzhen)co., Ltd.

Autel Intelligent Technology Corp., Ltd.

Hui Zhang

Chen Chen

Kai Zhang

Yongxing Zhou

Lei Guan

Bingyu Qu

Jing Zhang

Yan Zhang

Wei Li

Jianghua Liu

Wei Bai

Sha Ma

Yu-Hsu Lin

Qiang Li

Liang Xia

Lei Wan

Ying Huang

Chaojun Li

Kahkeen Lai

Rui Guo Zhang

Tao Li

Wei Wu

Xingqing Cheng

Chao Wang

Zaifeng Zong

Yong Zhang

Lian Duan

Jun Cheng

Yongxia Lv

Gang Wang

Xiaotao Ren

Zhiyu Yan

Shuang Liang

Xiaobo Chen

Tong Li

Yuan Xia

Jing Gu

Mingyu Zhou

Bo Hu

Xiaoan Fan

Wei Zhang

Hao Tang

Ning Ma

Min Wang

Bin Dai

Shilin You

Deyuan Zhang

Jin Peng

Xi Wang

Weijun Sun

Shan Yang

Zhao Ma

Veronica Tan

Xiao Kan

Hongtao Peng

Shitao Yan

Yan Hong

Qiang Dan

Yiwei Zhou

Yu Shen

Hong-Zhi Sun

Lei Guo

Nian Liu

Chen Zhang

Jun Ye

Tingchao Zhang

Zhaoji Lin

Yue Wang

Hui Wang

Cheng Feng

Qiang Ding

Fan Yu

Zhan Zhan

Jeng-Da Wu

Jie Hou

Tingyong Tang

Yulei Liu

Lei Zheng

Qian Zhou

Zhi-Ping Wu

Ruiyi Zhou

Xu Zhang

Zhipei Wang

Yuanda Huang

Bosen He

Chiwu Ding

Jiyan Cai

Hao Dong

Lixin Sun

Qiong Wang

Xin Qing

Wei Su

Huaping Qing

Peng Dong

Biao Zhang

Jinchao Zhang

Ye Zou

Changjun Yang

Sirui Liu

The present invention provides a MEMS piezoelectric speaker including a substrate with a back cavity, a diaphragm, a capacitive system and a flexible film. The diaphragm includes a fixed end, a suspended end. Adjacent suspended ends are at least partially spaced to form a slit. The suspended end includes a support section and a piezoelectric section. Along the thickness direction of the MEMS piezoelectric speaker, a flexible film is at least partially spaced from the diaphragm and the flexible film is spaced from the substrate. This design can improve the sound pressure level of the MEMS piezoelectric speaker in the middle and high frequency, and improve the acoustic performance of the MEMS piezoelectric speaker.

MEMS piezoelectric speaker

A three-axis MEMS gyroscope includes a substrate, a sensing unit connected with the substrate, and a driving unit driving the sensing unit to move. The substrate includes anchor point structures and coupling structures connected with the anchor point structures. The driving unit includes driving pieces. One ends of each of the driving pieces are elastically connected with an adjacent coupling structure. The sensing unit includes X and Y mass blocks and Z mass blocks. Each of the X and Y mass blocks is arranged in a corresponding avoiding space. The X and Y mass blocks are respectively connected with adjacent coupling structures to form a rectangular frame. The Z mass blocks are connected with the driving pieces and separately arranged on one side of each driving piece away from each anchor point structure. The three-axis MEMS gyroscope is differentially driven, which realizes differential detection and reduces quadrature error.

Three-axis MEMS gyroscope

The invention discloses a MEMS gyroscope, including a substrate, a first unit and a second unit, and the first unit and the second unit are relatively arranged on the substrate along the first direction. The first unit is connected to the second unit through a coupling spring, and the substrate is also provided with a driving electrode and a detection electrode. The first unit includes a first weight and a second weight. The second unit includes the third weight and the fourth weight set oppositely along the second direction. The second set of coupling structures are connected to the third weight and fourth weight. Compared with the prior art, the beneficial effect of the present invention is that the MEMS gyroscope adopts a symmetrical layout, which facilitates the realization of differential detection and improves the sensitivity.

MEMS gyroscope

The present invention provides a MEMS speaker including a substrate sidewall enclosing a cavity. The substrate sidewall includes a first surface and a second surface, a sounding assembly that is arranged on the first surface of the substrate sidewall and also seals the cavity at the opening of the first surface, and a bracket disposed in the cavity. The sounding assembly includes a first sounding assembly and the second sounding assembly. Each sounding assembly includes a driving part and a flexible diaphragm. The flexible diaphragm closes the gap formed between the free ends of adjacent driving parts and between the free ends of the driving parts and the substrate sidewall. The present invention also provides a manufacturing method of MEMS speaker. The MEMS speakers provided by the present invention have high-quality acoustic performance.

MEMS speaker and manufacturing method for same

Provided is a fully decoupled MEMS gyroscope, including an anchor point unit, a sensing unit elastically connected to the anchor point unit, and a driving unit configured to drive the sensing unit to move. The anchor point unit includes a center anchor point subunit located at a center of a rectangle and four side anchor points. The driving unit includes four driving members located on four sides of the rectangle. The sensing unit includes two X mass blocks symmetrically arranged in two avoiding intervals, two Y mass blocks symmetrically arranged in the other two avoiding intervals, four Z mass blocks respectively located at an outer side of each driving member, and four Z detection decoupling members respectively located at an outer side of each Z mass block. The X mass blocks and the Y mass blocks are respectively connected to each side anchor point.

Fully decoupled three-axis MEMS gyroscope

A micromachined gyroscope and an electronic product are provided. The micromachined gyroscope includes a driving component, a detecting component, first connecting components, and second connecting components. The driving component includes first driving pieces, second driving pieces, and driving devices driving the first driving pieces and the second driving piece to move. The detecting component includes first detecting pieces arranged along a third direction, second detecting pieces arranged along a fourth direction, and detecting devices for detecting movement distances of the first detecting pieces and/or the second detecting pieces along a fifth direction. Each of the first connecting pieces and the second connecting pieces rotates around a center thereof, so the second detecting pieces and the first detecting pieces respectively reciprocate along the third direction and the fourth direction. The micromachined gyroscope and the electronic product realize differential detection and effectively avoid influence of acceleration shock and quadrature error.

Micromachined gyroscope and electronic product

The invention provides a MEMS speaker including a substrate enclosing a cavity, a cantilever beam at least partially suspended above the cavity, a piezoelectric actuator away from the cavity, a polymer layer away from the cavity and attached to the cantilever beam and the piezoelectric actuator for completely covering the cantilever beam, the piezoelectric actuator and the cavity, and a piezoelectric composite vibration structure formed by the polymer layer. The cantilever beam includes a first section fixed to the substrate, a second section extending from the first section to the cavity and suspended above the cavity, and a third section extending from the second section away from the first section, an end of the third section away from the second section being suspended; and the piezoelectric actuator is only fixed with the third section.

MEMS speaker

A meeting control method includes: displaying one or more meeting presentation portals in a shared content selection page of a meeting application; determining, in response to a trigger operation on the one or more meeting presentation portals, a meeting presentation portal triggered by the trigger operation as a target meeting presentation portal, and determining an application corresponding to the target meeting presentation portal as a target application; and sharing and projecting, in the meeting application, only a target interface content in the target application based on protocol parameters of the meeting application and the target application in response to receipt success information transmitted by the target application, the target interface content being content that the meeting application has a permission of sharing and projection.

Meeting control method and apparatus, device, and medium

Car recorder stand

A MEMS gyroscope for three-axis detection relates to the technical field of gyroscope and includes a substrate, a sensing unit elastically connected with the substrate, and a driving unit coupled with the sensing unit and driving the sensing unit to move. The substrate includes anchor point structures respectively located at four corners of the substrate and four coupling structures respectively elastically connected with the four anchor point structures. An avoiding space is formed between two adjacent coupling structures. The driving unit includes two driving pieces separately elastically connected with adjacent coupling structures. The two driving pieces are symmetrically arranged and are frame-shaped. The sensing unit includes four X and Y mass blocks, two Z mass blocks elastically connected with the driving pieces, and two decoupling mass blocks. The two decoupling mass blocks are elastically connected. The MEMS gyroscope is differentially driven, which realizes differential detection and reduces quadrature error.

MEMS gyroscope for three-axis detection

A micromechanical gyroscope and an electronic device are related. The micromechanical gyroscope includes a first movement member, a second movement member, many drive members and a detection member, the first movement member has a first center, with two ends along a second direction oscillating around the first center along a first and a third directions, the second movement member has a second center, with two ends along the first direction oscillating around the second center along the second and third directions. The drive members can drive oscillations of the first and second movement members. The detection member is located above or below the first and second movement members in the third direction, to detect moving distances of the first and second movement members along the third direction. The micromechanical gyroscope can detect angular velocities in two directions simultaneously and perform differential detection to reduce errors, thus expanding application scenarios.

Micromechanical gyroscope and electronic device

The invention provides a micromachined gyroscope. The micromachined gyroscope includes a driving structure, a detection structure and a connection component. The driving structure includes a first moving component and a driving component. The driving component is used to drive the movement of the first moving component. The detection structure includes a second moving component and a detection component installed in the second moving component. The detection component is used to detect the movement distance of the second moving component along the third or fourth direction. The driving component is installed inside the first moving component, and the detection component is installed inside the second moving component. Greater drive of amplitude can be achieved at the same drive voltage, thereby increasing the sensitivity of the micromachined gyroscope.

Micromachined gyroscope and electronic product using same

Car recorder

A MEMS gyroscope includes an anchor point, at least two driving structures connected with the anchor point; a mass group connected with the driving structures, and coupling beams connected with adjacent driving structures. The mass group includes two detecting components arranged on opposite sides of the driving structures and connected with the driving structures. Each of the detecting components includes two mass blocks arranged at intervals and detecting transducers arranged below or above the mass blocks. The mass blocks are connected with the driving structures. At least portions of the mass blocks extend to outsides of the driving structures. The mass blocks and the detecting transducers are symmetrically arranged, which is convenient for realizing differential detection. In an out-plane oscillation mode, most portions of the mass blocks sense an angular velocity. By adopting detecting transducers, electromechanical coupling coefficient of detection is effectively improved, and sensitivity and signal-to-noise ratio are improved.

A MEMS accelerometer includes a base, proof mass, at least one pair of seesaw structures, and an out-of-plane displacement detection component. The at least one pair of the seesaw structures are oppositely disposed and fixed on the base through anchor points, and the out-of-plane displacement detection component is configured to detect rotation of the at least one pair of the seesaw structures or out-of-plane linear motion of the proof mass. Linear displacement of the MEMS accelerometer is not only beneficial to improve linearity of a capacitive displacement detection, but also to other non-capacitive detection methods, such as optical displacement detection. In addition, a double coupling structure is adopted to jointly couple rotation of seesaws, and remaining translational and rotational modes of the seesaw structures are suppressed.

MEMS accelerometer

Growing community of inventors

Shenzhen, China

Hui Zhang