公开(公告)号：US20190261074A1

公开(公告)日：2019-08-22

申请号：US16400776

申请日：2019-05-01

申请人： KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Armando Arpys AREVALO CARRENO ,  David CONCHOUSO GONZALEZ ,  David CASTRO SIGNORET ,  Ian G. FOULDS

IPC分类号： H04R1/00 ,  H04R31/00 ,  H04R17/00 ,  H04R1/02

摘要： Various examples are provided for digital sound reconstruction using piezoelectric array elements. In one example, a digital loudspeaker includes a fixed frame and an array of transducers disposed on the fixed frame. Individual transducers of the array of transducers can include a flexible membrane disposed on a piezoelectric actuation element positioned over a corresponding opening that extends through the fixed frame. In another example, a method includes forming a flexible membrane structure on a substrate and backetching the substrate opposite the flexible membrane structure. The flexible membrane structure can be formed by disposing a first electrode layer on a substrate, disposing a piezoelectric layer on the first electrode layer and disposing a second electrode layer on the piezoelectric layer. A flexible membrane layer (e.g., polyimide) can be disposed on the second electrode layer.

公开(公告)号：US20180280911A1

公开(公告)日：2018-10-04

申请号：US15763618

申请日：2016-10-07

申请人： KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： David CONCHOUSO GONZALEZ ,  Armando Arpys AREVALO CARRENO ,  Ian G. FOULDS

IPC分类号： B01J13/08 ,  B01L3/00 ,  B01L3/02

摘要： Droplet generation devices and systems that parallelize droplet generation devices are provided. The droplet generation devices can include a symmetric block-and-break system and a tapered droplet generation zone. The symmetric block-and-break system can include a pair of break channels and a pair of bypass channels symmetrically arranged with respect to the dispersed-phase input channel and the output channel. The droplet generation devices can generate monodisperse droplets with a predefined volume over a range of flow rates, pressures, and fluid properties. The droplet generation devices are therefore capable of parallelization to achieve large-capacity droplet generation, e.g. greater than 1 L/hr, with small overall coefficients of variation.

公开(公告)号：US20180098139A1

公开(公告)日：2018-04-05

申请号：US15563829

申请日：2016-04-07

申请人： KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Armando Arpys AREVALO CARRENO ,  David CONCHOUSO GONZALEZ ,  David CASTRO SIGNORET ,  Ian G. FOULDS

IPC分类号： H04R1/00 ,  H04R31/00 ,  H04R17/00 ,  H04R1/02

CPC分类号： H04R1/005 ,  H04R1/02 ,  H04R17/00 ,  H04R17/005 ,  H04R31/00 ,  H04R31/006 ,  H04R2201/003

摘要： Various examples are provided for digital sound reconstruction using piezoelectric array elements. In one example, a digital loudspeaker includes a fixed frame and an array of transducers disposed on the fixed frame. Individual transducers of the array of transducers can include a flexible membrane disposed on a piezoelectric actuation element positioned over a corresponding opening that extends through the fixed frame. In another example, a method includes forming a flexible membrane structure on a substrate and backetching the substrate opposite the flexible membrane structure. The flexible membrane structure can be formed by disposing a first electrode layer on a substrate, disposing a piezoelectric layer on the first electrode layer and disposing a second electrode layer on the piezoelectric layer. A flexible membrane layer (e.g., polyimide) can be disposed on the second electrode layer.