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公开(公告)号:US20210080554A1
公开(公告)日:2021-03-18
申请号:US16829467
申请日:2020-03-25
Applicant: Samsung Electronics Co., Ltd.
Inventor: Muncheon KANG , Kwanghyuk BAE , Hayoung KO , Duckchan SEO , Chulwoong LEE
Abstract: A method of calibrating errors in a time-of-flight (ToF) sensor includes illuminating a test object with a transmission light that is modulated based on a modulation signal; generating, using a buffer chain circuit, a plurality of demodulation signals having different local delay phases; providing a plurality of measured phase differences by providing the plurality of demodulation signals to a plurality of pixel groups included in a ToF sensor to sample a reception light reflected from the test object based on the plurality of demodulation signals; determining a wiggling error based on the plurality of measured phase differences, the wiggling error depending on a phase difference between the transmission light and the reception light; and calibrating a measured distance from the ToF sensor to a target object based on the wiggling error.
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公开(公告)号:US20190019000A1
公开(公告)日:2019-01-17
申请号:US15978586
申请日:2018-05-14
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor: Minchul LEE , Kwanhee LEE , Daeyoung CHUNG , Sanghyun CHO , Wonho CHO , Hayoung KO , Jongsung LEE , Heechang HWANG
Abstract: An optics-based fingerprint sensor may include a first photodiode, a first metal shield structure that is formed on the first photodiode and includes a first opening, a first color filter structure that is formed on the first metal shield structure and including a second opening exposing the first opening, a second photodiode that is spaced apart from the first photodiode by a predetermined distance, a first nano-optical filter structure that is formed on the second photodiode, and a first band limit filter structure that is formed on the nano-optical filter structure.
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