公开(公告)号：US11625939B2

公开(公告)日：2023-04-11

申请号：US16933952

申请日：2020-07-20

Applicant: Novatek Microelectronics Corp.

Inventor： Huan-Teng Cheng ,  Ting-Hsuan Hung ,  Tzu-Wen Hsieh ,  Wei-Lun Shih ,  Huang-Chin Tang

IPC: G06V40/13 ,  G06F3/041 ,  G09G3/20

Abstract: An electronic circuit adapted to drive a display panel including touch sensors and fingerprint sensors is provided. The electronic circuit includes a first circuit, a second circuit, a first switch circuit and a control circuit. The first circuit generates display driving signals for driving the display panel. The second circuit receives fingerprint sensing signals from the fingerprint sensors. The first switch circuit is coupled to a second switch circuit on the display panel. The control circuit generates control signals for controlling the first switch circuit and the second switch circuit, so as to control the electronic circuit to transmit the display driving signals from the first circuit to the data lines through the first and the second switch circuits in a first time interval, and control the electronic circuit to receive the fingerprint sensing signals from the fingerprint sensors through the first and the second switch circuits in a second time interval.

公开(公告)号：US20220197469A1

公开(公告)日：2022-06-23

申请号：US17558611

申请日：2021-12-22

Applicant: Novatek Microelectronics Corp.

Inventor： Yu-Hsien Lee ,  Ting-Hsuan Hung ,  Feng-Lin Chan ,  Wu Wei Lin

IPC: G06F3/041 ,  G06V40/13

Abstract: A fingerprint sensing apparatus includes a plurality of fingerprint sensors and a fingerprint readout circuit. The fingerprint sensors may be configured to operate in a fingerprint sensing cycle. The fingerprint readout circuit may be coupled to the plurality of fingerprint sensors via a plurality of sensing lines. The fingerprint readout circuit may be configured to control the fingerprint sensors to operate in the fingerprint sensing cycle. The fingerprint sensing cycle includes an initialization period, an exposure period and a readout period. A voltage of a reset node in each fingerprint sensor among the plurality of fingerprint sensors is reset to a first voltage in a reset period after the fingerprint sensing cycle ends. The voltage of the reset node in each fingerprint sensor is initialized to an initial voltage in the initialization period. The initial voltage is different from the first voltage.

公开(公告)号：US20210256240A1

公开(公告)日：2021-08-19

申请号：US16789448

申请日：2020-02-13

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hung-Kai Chen ,  Ting-Hsuan Hung ,  Chih-Yuan Chang ,  Feng-Lin Chan

IPC: G06K9/00

Abstract: A fingerprint detecting system comprises a fingerprint module, for receiving a fingerprint driving signal and performing a frequency modulation on the fingerprint driving signal, to correspondingly outputting a fingerprint signal with a first frequency based on the fingerprint driving signal, and a signal processing circuit, coupled to the fingerprint module, for receiving the fingerprint signal with the first frequency, performing a frequency demodulation to shift the first frequency of the fingerprint signal to a second frequency, and filtering the fingerprint signal with the second frequency based on the first frequency, whereby the filtered fingerprint signal is used for a fingerprint data analysis.

公开(公告)号：US11030435B1

公开(公告)日：2021-06-08

申请号：US16828918

申请日：2020-03-24

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ting-Hsuan Hung ,  Wei-Lun Shih ,  Wu-Wei Lin

IPC: G06K9/00 ,  G06K9/03 ,  G06K9/20

Abstract: A method of sensing an image from a panel for an image sensing circuit includes the steps of: transmitting a first voltage or current to the panel; receiving a plurality of sensing signals from the panel, wherein the plurality of sensing signals correspond to the first voltage or current; determining whether the plurality of sensing signals conform to an operation range of the image sensing circuit; and adjusting the first voltage or current when the plurality of sensing signals are determined to be not conform to the operation range of the image sensing circuit.

公开(公告)号：US20210034835A1

公开(公告)日：2021-02-04

申请号：US16907306

申请日：2020-06-21

Applicant: Novatek Microelectronics Corp.

Inventor： Huan-Teng Cheng ,  Ting-Hsuan Hung ,  Wei-Lun Shih ,  Huang-Chin Tang

IPC: G06K9/00

Abstract: An electronic circuit including a touch control circuit, a fingerprint sensing circuit and a switch circuit is provided. The touch control circuit is configured to receive touch sensing signals from a panel and determine a touch area according to the touch sensing signals. The fingerprint sensing circuit is configured to receive fingerprint sensing signals corresponding to at least one fingerprint image from fingerprint sensors disposed in the panel via fingerprint sensing lines. The switch circuit is coupled to the fingerprint sensing circuit. The switch circuit is configured to be coupled to a part of the fingerprint sensing lines that is selected to form a fingerprint sensing zone for a fingerprint sensing operation according to the determined touch area. Each of the fingerprint sensing lines is selectable to be a boundary of the fingerprint sensing zone. An electronic device and a method for sensing at least one fingerprint image are also provided.