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    CIRCUIT BOARD AND PACKAGE SUBSTRATE COMPRISING SAME
    15.
    发明公开
    CIRCUIT BOARD AND PACKAGE SUBSTRATE COMPRISING SAME 审中-公开

    公开(公告)号：US20240120265A1

    公开(公告)日：2024-04-11

    申请号：US18274946

    申请日：2022-01-28

    Applicant: LG INNOTEK CO., LTD.

    Inventor： Sang Young LEE ,  Dong Min KIM ,  Jin Soo BAE

    IPC: H01L23/498 ,  H01L21/48

    CPC classification number: H01L23/49838 ,  H01L21/4857 ,  H01L23/49822

    Abstract: A circuit board according to an embodiment comprises an insulating layer; an electrode layer disposed on the insulating layer; and a protective layer disposed on the insulating layer and including an opening vertically overlapping at least a portion of an upper surface of the electrode layer; wherein the electrode layer includes: a first layer disposed on the insulating layer; a second layer disposed on the first layer; a third layer disposed on the second layer; and a fourth layer disposed on the third layer, wherein a width of the second layer is greater than a width of the third layer, wherein a thickness of the second layer is greater than a thickness of the third layer, and wherein a height of an upper surface of the protective layer is equal to or less than a height of an upper surface of the third layer.

    ULTRASONIC MASK AND SKIN CARE DEVICE COMPRISING SAME
    16.
    发明申请
    ULTRASONIC MASK AND SKIN CARE DEVICE COMPRISING SAME 有权

    公开(公告)号：US20220160111A1

    公开(公告)日：2022-05-26

    申请号：US17437083

    申请日：2020-02-26

    Applicant: LG INNOTEK CO., LTD.

    Inventor： Do Hee KEUM ,  Min Seok OH ,  Sang Young LEE

    IPC: A45D44/00

    Abstract: An ultrasonic mask according to an embodiment comprises: a first substrate; a first wire disposed on the upper surface of the first substrate; a second substrate disposed above the first substrate; a second wire disposed on the lower surface of the second substrate; a piezoelectric member between the first substrate and the second substrate; a first electrode connected to the first wire and disposed on the lower surface of the piezoelectric member; and a second electrode connected to the second wire and disposed on the upper surface of the piezoelectric member, wherein the first wire and the second wire have curvatures (mm) of 5R to 15R, and the piezoelectric member generates an ultrasonic wave having a frequency band of 20 kHz to 1 MHz.

    ULTRASONIC LINEAR MOTOR AND OPERATION METHOD THEREFOR
    20.
    发明申请
    ULTRASONIC LINEAR MOTOR AND OPERATION METHOD THEREFOR 有权

    公开(公告)号：US20230128248A1

    公开(公告)日：2023-04-27

    申请号：US17912173

    申请日：2021-01-29

    Applicant: LG INNOTEK CO., LTD.

    Inventor： Sang Young LEE ,  Myoung Seok SUNG

    IPC: H02N2/06 ,  H02N2/02 ,  G02B7/02

    Abstract: Disclosed are an ultrasonic linear motor and a method of driving the same. The ultrasonic linear motor includes a vibrator including an elastic portion and a first piezoelectric element and a second piezoelectric element which are disposed on two surfaces of the elastic portion, a moving shaft coupled to the vibrator and moved according to a displacement of the vibrator, a mover inserted into and coupled to the moving shaft, and a controller which applies a first driving pulse and a second driving pulse to the first piezoelectric element and the second piezoelectric element, wherein a frequency of the first driving pulse and a frequency of the second driving pulse are set to a frequency between a resonant frequency at which an impedance is minimum and an anti-resonant frequency at which the impedance is maximum.

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