公开(公告)号：US20230168282A1

公开(公告)日：2023-06-01

申请号：US17539170

申请日：2021-11-30

Applicant: NOVATEK Microelectronics Corp.

Inventor： Tzu-Wei Lin ,  Hung-Kai Chen ,  Feng-Lin Chan

IPC: G01R1/30 ,  H03G3/30

CPC classification number: G01R1/30 ,  H03G3/30 ,  H03G2201/103

Abstract: An analog front-end (AFE) circuit, configured to be coupled to a sensor having a plurality of sensing units, includes a plurality of sensing circuits and a plurality of multiplexers. Each of the plurality of multiplexers is coupled between one of the plurality of sensing units and at least two of the plurality of sensing circuits.

公开(公告)号：US11194424B2

公开(公告)日：2021-12-07

申请号：US16876167

申请日：2020-05-18

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Feng-Lin Chan ,  Hung-Kai Chen ,  Yuan-Fu Hsueh ,  Chun-Yuan Pai

IPC: G06F3/041

Abstract: The driving apparatus for driving a touch display panel includes a first voltage generating circuit configured to generate a common reference voltage, a second voltage generating circuit configured to generate a touch driving signal, and a control circuit configured to generate a switching signal. The switching signal is at the first voltage level during display periods for providing the common reference voltage to the touch display panel. The switching signal is at the second voltage level during touch periods for providing the touch driving signal to the touch display panel. A first touch display period includes a first display period a first touch period adjacent to the first display period. A second touch display period includes a second display period and a second touch period adjacent to the second display period. The first touch display period and the second touch display period are different in time length.

公开(公告)号：US10656751B2

公开(公告)日：2020-05-19

申请号：US15975810

申请日：2018-05-10

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Feng-Lin Chan ,  Hung-Kai Chen ,  Yuan-Fu Hsueh ,  Chun-Yuan Pai

IPC: G06F3/041 ,  G06F3/044

Abstract: The driving apparatus for driving a touch display panel includes a first voltage generating circuit configured to generate a common reference voltage, a second voltage generating circuit configured to generate a touch driving signal, and a control circuit configured to generate a switching signal. The switching signal is at the first voltage level during display periods for providing the common reference voltage to the touch display panel. The switching signal is at the second voltage level during touch periods for providing the touch driving signal to the touch display panel. A first touch display period includes a first display period a first touch period adjacent to the first display period. A second touch display period includes a second display period and a second touch period adjacent to the second display period. The first touch display period and the second touch display period are different in time length.

公开(公告)号：US20220357832A1

公开(公告)日：2022-11-10

申请号：US17738590

申请日：2022-05-06

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hung-Kai Chen ,  Feng-Lin Chan

IPC: G06F3/041

Abstract: A touch control circuit, display-and-touch system, touch panel and touch sensing method are disclosed. The system includes a display panel, a touch panel having a plurality of touch sensors, a touch control circuit and at least one interference sensing capacitor configured to be insensitive to a touch on the touch panel and interference other than the interference from an interference layer of the display panel, the touch control circuit includes: at least one interference sensing channel configured to receive an interference sensing signal from the at least one interference sensing capacitor; and a plurality of touch sensing channels configured to receive touch sensing signals from at least part of touch sensors of the plurality of touch sensors; wherein a first electrode of each interference sensing capacitor is connected with the interference layer of the display panel, and a second electrode thereof is connected with a corresponding interference sensing channel.

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.