Flexible thermoelectric devices
    122.
    发明授权

    公开(公告)号:US12178130B2

    公开(公告)日:2024-12-24

    申请号:US17295851

    申请日:2019-11-20

    Abstract: Thermoelectric devices (TE) devices may be used to power wearable electronics, such as watches and sensors by harvesting heat from the body. These TE devices may fully power or partially power the wearable devices to extend a usage time, or to recharge a battery. In other example embodiments, TE devices can be used to provide heating and/or cooling. The TE devices can be integrated into garments such as clothes, vests, and armbands for outdoor and indoor environments. For outdoor environments, applications include, but are not limited to, sports such as golfing, bicycling, running, walking, training, soccer, hiking, and other outdoor activities related to occupations, such as construction, fire-fighting, military operations, law enforcement, farming, underground mining, and so on. In other example embodiments, TE devices can be used to provide thermal camouflaging for people and objects so as to not be seen by thermal imaging devices.

    Micro light emitting diodes with nanohole grating for high speed, high efficiency applications

    公开(公告)号:US12176470B2

    公开(公告)日:2024-12-24

    申请号:US16994391

    申请日:2020-08-14

    Abstract: A light emitting diode may include a light emission layer and a charge transport layer disposed on the light emission layer. A grating including a plurality of nanoholes may be formed by removing a portion of the charge transport layer and/or the light emission layer and depositing a plasmonic metamaterial on a remaining portion of the charge transport layer and/or the light emission layer. The nanoholes may include the plasmonic metamaterial deposited inside the recesses formed by the remaining portion of the charge transport layer and/or the light emission layer, with an additional portion of the charge transport layer disposed on top. A pitch, diameter, and/or depth of the nanoholes may be configured to maximize the quantum efficiency of the light emitting diode, especially at a microscale of less than 100 microns.

    Resonant cockcroft-walton voltage converters using multi-phase clocking techniques

    公开(公告)号:US12170484B2

    公开(公告)日:2024-12-17

    申请号:US18592043

    申请日:2024-02-29

    Abstract: A Cockcroft-Walton (CW) switching voltage converter is disclosed. This CW switching converter includes a set of capacitors; an inductor coupled between an input voltage source and the set of capacitors; a set of switches; and an N-phase control module coupled to the set of switches. In some embodiments, each switch is controlled by the N-phase control module which is configured to sequentially and periodically effectuate a set of N voltage-conversion phases in a sequence of switching cycles. Note that each switching cycle effectuates a voltage conversion through the set of N voltage-conversion phases, wherein N is the conversion ratio of the CW switching voltage converter. Moreover, the N-phase control module is configured to effectuate a phase transition from a current phase to a subsequent phase when a zero-current switching (ZCS) condition on a given switch is met.

    Designs and Applications of a Low-Drag, High-Efficiency Microchannel Polymer Heat Exchanger

    公开(公告)号:US20240410662A1

    公开(公告)日:2024-12-12

    申请号:US18771285

    申请日:2024-07-12

    Abstract: Designs and applications of a polymer heat exchanger that includes a set of polymer plates with internal flow passages configured to carry a first gas or liquid. The set of plates is organized into a stack, wherein consecutive plates in the stack are separated by fins to form intervening flow passages for a second gas or liquid. The system includes a first liquid or gas flow pathway, which flows from an inlet, through the internal flow passages, to a first liquid or gas outlet. It also includes a second liquid or gas flow pathway, which flows from an inlet, through the intervening second gas or liquid passages, to an outlet. The first liquid or gas flow pathway flows in a direction opposite to a direction of the second liquid or gas flow pathway to provide a counterflow design that optimizes heat transfer between the two flow pathways.

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