Invention Grant
- Patent Title: Sensing device and display device
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Application No.: US16514703Application Date: 2019-07-17
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Publication No.: US10908722B2Publication Date: 2021-02-02
- Inventor: YoungJang Lee , JunHo Lee
- Applicant: LG Display Co., Ltd.
- Applicant Address: KR Seoul
- Assignee: LG Display Co., Ltd.
- Current Assignee: LG Display Co., Ltd.
- Current Assignee Address: KR Seoul
- Agency: Fenwick & West LLP
- Priority: KR10-2018-0146369 20181123
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06K9/00 ; G02F1/1333 ; G06F3/044 ; G01S15/42 ; G01H11/06 ; H01L27/12 ; H03F3/08 ; G09G3/34 ; H01L27/146 ; G02F1/1335 ; G09G3/36

Abstract:
The present disclosure relates to a sensing device and a display device including the sensing device. The sensing device includes a transducer including first and second driving electrodes and a piezoelectric material layer; first and second transmission transistors for alternatively supplying first and second driving voltages to the first driving electrode; and first and second reception transistors electrically connected between a readout line and a power supply line to which a power supply voltage is supplied. During an interval in which at least one pixel is driven, the first and second driving voltages are DC voltages with a voltage level different from each other, and the first and second transmission transistors repeat turn-on and turn-off at a timing different from each other. Through this, it is possible to reduce unnecessary power consumption, and therefore, a large area fingerprint sensor can be more efficiently implemented.
Public/Granted literature
- US20200167026A1 Sensing Device and Display Device Public/Granted day:2020-05-28
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