公开(公告)号：US20230164463A1

公开(公告)日：2023-05-25

申请号：US17697898

申请日：2022-03-17

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jung-Yu Tsai ,  Chen-Tsung Wu ,  Kuan-Lin Wu ,  Hung-Yu Yang

IPC: H04N5/3745 ,  H04N5/376 ,  H03M1/18

CPC classification number: H04N5/37455 ,  H04N5/3765 ,  H03M1/18

Abstract: An image compensation circuit for an image sensor includes a gain amplifier, a compensation control circuit, a memory and a digital-to-analog converter (DAC). The gain amplifier is used for receiving a plurality of image signals from the image sensor and amplifying the plurality of image signals. The compensation control circuit is used for generating a plurality of compensation values for the plurality of image signals. The memory, coupled to the compensation control circuit, is used for storing the plurality of compensation values. The DAC, coupled to the memory and the gain amplifier, is used for converting the plurality of compensation values into a plurality of compensation voltages, respectively, to compensate the plurality of image signals with the plurality of compensation voltages.

公开(公告)号：US11227141B2

公开(公告)日：2022-01-18

申请号：US16850015

申请日：2020-04-16

Applicant: Novatek Microelectronics Corp.

Inventor： Shao-Yang Chiang ,  I-Hsiu Chen ,  Hung-Yu Yang

IPC: G06K9/00 ,  G06F3/042 ,  G06F3/041

Abstract: A fingerprint identification device and a fingerprint identification method are provided. The fingerprint identification device includes a self-emitting display panel, a fingerprint sensor and a processor. The self-emitting display panel displays at least one light pattern in a sensing region. The fingerprint sensor senses a finger object located above the sensing region of the self-emitting display panel to generate a first fingerprint image and a second fingerprint image corresponding to the at least one light pattern. The processor is coupled to the fingerprint sensor. The processor determines whether the first fingerprint image and the second fingerprint image have opposite tones to identify the finger object is a real finger or a fake finger.

公开(公告)号：US20210004562A1

公开(公告)日：2021-01-07

申请号：US16850015

申请日：2020-04-16

Applicant: Novatek Microelectronics Corp.

Inventor： Shao-Yang Chiang ,  I-Hsiu Chen ,  Hung-Yu Yang

IPC: G06K9/00 ,  G06F3/042 ,  G06F3/041

Abstract: A fingerprint identification device and a fingerprint identification method are provided. The fingerprint identification device includes a self-emitting display panel, a fingerprint sensor and a processor. The self-emitting display panel displays at least one light pattern in a sensing region. The fingerprint sensor senses a finger object located above the sensing region of the self-emitting display panel to generate a first fingerprint image and a second fingerprint image corresponding to the at least one light pattern. The processor is coupled to the fingerprint sensor. The processor determines whether the first fingerprint image and the second fingerprint image have opposite tones to identify the finger object is a real finger or a fake finger.