公开(公告)号：US20220189196A1

公开(公告)日：2022-06-16

申请号：US17548602

申请日：2021-12-13

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： WEILUN SHIH ,  WU-WEI LIN

IPC: G06V40/12 ,  G06F3/041 ,  G06V10/22

Abstract: A method and device of fingerprint image generation for saving memory. The method includes generating a first fingerprint image of an original data size according to a plurality of first analog sensing signals which are read from a fingerprint sensor array before an exposure period ends. Then the first fingerprint image represented by a first data size which is equivalent to or smaller than the original data size is stored. a second fingerprint image of the original data size is generated after generating the first fingerprint image of the original data size according to a plurality of second analog sensing signals which are read from the fingerprint sensor array during the exposure period. The second fingerprint image represented by a compressed data size smaller than the original data size is then stored.

公开(公告)号：US20240249548A1

公开(公告)日：2024-07-25

申请号：US18625159

申请日：2024-04-02

Applicant: Novatek Microelectronics Corp.

Inventor： WEILUN SHIH ,  WU-WEI LIN

IPC: G06V40/12 ,  G06F3/041 ,  G06V10/22

CPC classification number: G06V40/12 ,  G06F3/0416 ,  G06V10/235

Abstract: A method and device of fingerprint image generation for saving memory are introduced. The method includes receiving a plurality of touch sensing values from a touch display panel and determining which touch sensing electrodes detect a touch event. An area corresponding to a number of touch sensing electrodes, which are a part of a plurality of touch sensing electrodes determined as detecting the touch event, is taken as an effective fingerprint area. The effective fingerprint area is determined by comparing a preset value and touch sensing values sensed by the plurality of touch sensing electrodes those are determined as detecting the touch event. The method further performs fingerprint sensing in a fingerprint readout area and storing a first fingerprint image corresponding to the effective fingerprint area .