Key structure and keyboard using the same

    公开(公告)号:US09941074B2

    公开(公告)日:2018-04-10

    申请号:US15297237

    申请日:2016-10-19

    Inventor: Ya-Chun Tu

    Abstract: A key structure comprises a substrate, a membrane circuit disposed on the substrate, a waterproof structure disposed on the membrane circuit, a keycap, a conduction switch and a scissors structure. The waterproof structure includes a waterproof plate and a waterproof wall with a through hole. The waterproof wall surrounds the through hole and extends opposite to the membrane circuit. An end of the conduction switch passes through the through hole to be disposed on the membrane circuit, and the other end of the conduction switch protrudes from the waterproof wall to be connected to the keycap. The scissors structure includes a first end portion and a second end portion. The first end portion is pivotally connected to the keycap, and the second end portion is pivotally connected to the waterproof wall for the keycap to move up and down relatively to the membrane circuit.

    DIGITAL POWER SUPPLY DEVICE AND OPERATION METHOD THEREOF

    公开(公告)号:US20180095515A1

    公开(公告)日:2018-04-05

    申请号:US15716740

    申请日:2017-09-27

    CPC classification number: G06F1/3243 H02J1/14

    Abstract: A digital power supply device is provided. The digital power supply device comprises a digital power supply controller, a switch and a control module. The digital power supply controller includes a first digital power supply module configured to generate and provide a first electric energy to a first load via a first path; and a second digital power supply module configured to generate a second electric energy. The switch is electrically connected to the second digital power supply module. The control module is configured to send a control command to the switch to control the switch electrically connected to the first path or a second path. An operation method of a digital power supply device is also provided.

    METHOD AND APPARATUS FOR IMPROVING RANDOM ACCESS PROCEDURE IN A WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20180035469A1

    公开(公告)日:2018-02-01

    申请号:US15663662

    申请日:2017-07-28

    CPC classification number: H04W74/0833 H04W72/10 H04W74/002

    Abstract: A method and apparatus are disclosed, from the perspective of the UE, for performing random access procedure. In one embodiment, the method includes the UE receives a first back-off information from the network in a broadcast message, wherein the first back-off information includes a start offset of back-off interval. The method further includes the UE transmits a first preamble to the network. In addition, the method includes the UE determines a back-off interval based on the first back-off information and a second back-off information, wherein the second back-off information is received when the UE monitors a response for the first preamble. The method also includes the UE transmits a second preamble to the network after the back-off interval is finished.

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