公开(公告)号：US11436855B2

公开(公告)日：2022-09-06

申请号：US17110327

申请日：2020-12-03

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Ping Liu ,  Chi-Ting Chen

IPC: G06V40/13 ,  G06F3/044 ,  G06V40/12

Abstract: A method for performing fingerprint sensing is introduced. The method includes performing a predetermined number of consecutive fingerprint sensing cycles; informing a processing unit that a fingerprint sensing driver is ready for providing pre-scanned fingerprint data after each cycle of a fingerprint sensing cycle set, wherein the fingerprint sensing cycle set includes at least one of the fingerprint sensing cycles except for a last one of the fingerprint sensing cycles; and providing the processing unit with the pre-scanned fingerprint data obtained from the each cycle of the fingerprint sensing cycle set. An electronic module capable of performing fingerprint sensing and a computing apparatus capable of performing the same are also provided.

公开(公告)号：US20210224505A1

公开(公告)日：2021-07-22

申请号：US17089667

申请日：2020-11-04

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ping Liu ,  Wu-Wei Lin

IPC: G06K9/00 ,  G09G3/36

Abstract: The present invention provides a method of a control circuit for controlling a fingerprint sensing operation of a display panel. The fingerprint sensing operation includes a reset operation, an exposure operation and a sample operation. The method includes steps of: performing the reset operation, the exposure operation and the sample operation of a fingerprint sensing cycle during a display frame interval in which a polarity of display data voltage on the display panel remains unchanged; and adjusting an exposure time of the exposure operation to be within the display frame interval.

公开(公告)号：US11302102B2

公开(公告)日：2022-04-12

申请号：US17089667

申请日：2020-11-04

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ping Liu ,  Wu-Wei Lin

IPC: G06V40/10 ,  G06V20/40 ,  H04L67/12 ,  G09G3/36 ,  G06V10/147 ,  G06V40/13 ,  G06V40/12

Abstract: The present invention provides a method of a control circuit for controlling a fingerprint sensing operation of a display panel. The fingerprint sensing operation includes a reset operation, an exposure operation and a sample operation. The method includes steps of: performing the reset operation, the exposure operation and the sample operation of a fingerprint sensing cycle during a display frame interval in which a polarity of display data voltage on the display panel remains unchanged; and adjusting an exposure time of the exposure operation to be within the display frame interval.

公开(公告)号：US10970509B1

公开(公告)日：2021-04-06

申请号：US16740497

申请日：2020-01-13

Applicant: Novatek Microelectronics Corp.

Inventor： Ping Liu

IPC: G06K9/00

Abstract: A fingerprint recognition apparatus with fingerprint data compression is introduced, including: a pixel array obtaining a fingerprint data; a control circuit coupling to the pixel array and obtaining characteristic values of the pixel array; an effective fingerprint distribution judgement circuit coupling to the pixel array and determining a first part of the pixel array as an effective fingerprint zone and a second part of the pixel array as an invalid fingerprint zone according to the characteristic values of each row of the pixel array; and a multi-compressing circuit coupling to the effective fingerprint distribution judgement circuit and compressing the fingerprint data in the effective fingerprint zone with a first compression method and compressing the fingerprint data in the invalid fingerprint zone with a second compression method.

公开(公告)号：US11551472B1

公开(公告)日：2023-01-10

申请号：US17749096

申请日：2022-05-19

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ping Liu ,  Chi-Ting Chen

IPC: G06V40/12 ,  G06V40/13

Abstract: A method of fingerprint recognition for a fingerprint sensing circuit includes steps of: performing a first fingerprint sensing process including a first exposure operation and a first readout operation under a first light spot setting; and performing a second fingerprint sensing process including a second exposure operation and a second readout operation under a second light spot setting. Wherein, a host performs a first fingerprint recognition in response to the first fingerprint sensing process; and wherein, the second light spot setting and the first fingerprint recognition are performed simultaneously.

公开(公告)号：US10990782B2

公开(公告)日：2021-04-27

申请号：US16676809

申请日：2019-11-07

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chun-Yen Lin ,  Ping Liu ,  Chi-Ting Chen

IPC: G06K9/00

Abstract: An operating method of an optical fingerprint capture apparatus includes: by the apparatus upon receipt of a scan command from a host, entering an exposure mode where an image sensor thereof is exposed to light carrying information of a fingerprint; by the apparatus upon complete exposure of the image sensor to the light, entering a sample mode where multiple pieces of pixel data that cooperatively represent an image of the fingerprint are obtained and written to a data buffer thereof; and by the apparatus at a predetermined output time point that is later than a start of the sample mode and earlier than an end of the sample mode, outputting an interrupt request to cause the host to start reading the pieces of pixel data from the data buffer.