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Assignee: Chirp;
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Piezoelectric micromachined ultrasonic transducers having stress relief …

Priority 2016-06-17 • Filed 2018-12-13 • Granted 2022-04-05 • Published 2022-04-05

A piezoelectric micromachined ultrasound transducer (PMUT) is disclosed. The device consists of a flexible membrane that is connected to a rigid substrate via flexures. The flexures are defined by slots etched through the perimeter of the membrane. These features release the stress present on the …

Dual motor cleansing brush

Priority 2016-05-20 • Filed 2016-05-20 • Granted 2018-07-17 • Published 2018-07-17

A brush comprising a first motor to control a rotation of a brush head, a second motor to control a vibration of the brush head. In one embodiment, the brush further comprises a controller to control of a ratio between the rotation and the vibration.

Three dimensional object-localization and tracking using ultrasonic pulses

Priority 2016-11-23 • Filed 2017-11-20 • Granted 2021-05-25 • Published 2021-05-25

A tracking method includes displaying visual content on a screen of a head mounted display (HMD). One or more base stations may be stationary with respect to the screen while the visual content is being displayed. In contrast, one or more objects may move with respect to the screen while the …

Micromachined ultrasound transducer using multiple piezoelectric materials

Priority 2014-05-09 • Filed 2015-04-02 • Granted 2019-06-05 • Published 2019-06-05

A transducer comprising: first and second piezoelectric layers (19, 20) made of corresponding different first and second piezoelectric materials; and three or more electrodes (18, 21, 22), implemented in two or more conductive electrode layers, wherein the first piezoelectric layer (19) is …

Package waveguide for acoustic sensor with electronic delay compensation

Priority 2014-11-07 • Filed 2017-05-01 • Granted 2020-02-25 • Published 2020-02-25

A system and method use an array of ultrasonic transducers to emit and receive sound in a phased array fashion by using acoustic waveguides to achieve a desired acoustic radiation and reception pattern. A chip package attached to an acoustic transducer array includes acoustic waveguides coupled to …

Piezoelectric micromachined ultrasonic transducers with low stress sensitivity …

Priority 2014-12-21 • Filed 2015-12-18 • Granted 2021-12-08 • Published 2021-12-08

A micromachined ultrasonic device, comprising: a substrate (200) having an opening (209) formed therethrough; a membrane layer (203) attached to the substrate (200) over the opening (209), a portion of the membrane layer (203) that overlies the opening (209) defining a vibrating region (201) of …

Micromachined ultrasonic transducers with a slotted membrane structure

Priority 2014-10-02 • Filed 2016-04-28 • Granted 2019-05-21 • Published 2019-05-21

A piezoelectric micromachined ultrasonic transducer (PMUT) device includes a substrate having an opening therethrough and a membrane attached to the substrate over the opening. A portion of the membrane that overlies the opening is divided into a plurality of cantilevers that are mechanically …

Piezoelectric micromachined ultrasonic transducers using two bonded substrates

Priority 2014-07-16 • Filed 2017-01-13 • Granted 2020-02-18 • Published 2020-02-18

A piezoelectric micromachined ultrasound transducer (PMUT) is disclosed. The PMUT consists of a flexural membrane that is piezoelectrically actuated. These membranes are formed on a first substrate that is bonded to a second substrate. The two substrates are separated by an air gap to allow the …

Chirp networks

Priority 2003-05-08 • Filed 2014-05-02 • Granted 2016-02-09 • Published 2016-02-09

A wire-less/Wired mesh network is described, using a multi-slot modular mesh node to house diverse transceiver elements (e.g. IR, Wi-Fi, Powerline). A radio agnostic tree based mesh network is formed, based on what type of wire-less links are formed on the uplink and downlink of the backhaul and …

Terse message networks

Priority 2002-10-28 • Filed 2014-10-24 • Granted 2017-08-08 • Published 2017-08-08

A tree-shaped mesh network is discussed which uses a mesh of wireless nodes that form a tree shaped network with one root node having a connection to an external network; chirp clients; and wireless network clients. Chirp clients comprise low cost chirp devices wherein said low cost chirp devices …
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