公开(公告)号：US12086358B1

公开(公告)日：2024-09-10

申请号：US18500782

申请日：2023-11-02

Applicant: STMicroelectronics International N.V.

Inventor： Qiang Ma ,  Yuan Yun Wang

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/041662 ,  G06F3/04186 ,  G06F3/0443 ,  G06F3/0446 ,  G06F2203/04106

Abstract: A touch status monitor method includes detecting a touch on a touch screen when operating in a low-power detect scan mode. The method further includes, in response to detecting the touch, switching from the low-power detect scan mode to a low-power active scan mode and labeling the current event as a touch down event. The method further includes, in response to labeling the current event as the touch down event, applying a lock to prevent updating a baseline when entering the low-power detect scan mode. And the method further includes, in response to detecting that the touch has left the touch screen, releasing the lock, labeling the current event as a touch up event, switching from the low-power active scan mode to the low-power detect scan mode, and updating the baseline.

公开(公告)号：US12223141B1

公开(公告)日：2025-02-11

申请号：US18446122

申请日：2023-08-08

Applicant: STMicroelectronics International N.V.

Inventor： Guodong Sun ,  Yue Ding ,  Yuan Yun Wang

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/047 ,  G06V40/12 ,  G06V40/13

Abstract: An example gesture detection method includes detecting at a first time a first touch on a touch panel, where the first touch covers a first area of the touch panel, and then determining whether the first touch is within a track region that surrounds a fingerprint sensing region. The method includes determining whether the first touch is within the fingerprint sensing region, the fingerprint sensing region including a sensing surface of a fingerprint sensor. The method includes determining a first fraction of the fingerprint sensing region covered by the first touch and determining whether the first fraction exceeds a first threshold. The first threshold is a majority of the fingerprint sensing region. The method includes determining a second fraction of all of the first area that is within the fingerprint sensing region and determining whether the second fraction exceeds a second threshold, where the second threshold is a fraction indicative of a majority of an area associated with the corresponding touch. The method includes based on determining that the second fraction exceeds the second threshold, determining whether the first touch is valid.

公开(公告)号：US20250053263A1

公开(公告)日：2025-02-13

申请号：US18446122

申请日：2023-08-08

Applicant: STMicroelectronics International N.V.

Inventor： Guodong Sun ,  Yue Ding ,  Yuan Yun Wang

IPC: G06F3/041

Abstract: An example gesture detection method includes detecting at a first time a first touch on a touch panel, where the first touch covers a first area of the touch panel, and then determining whether the first touch is within a track region that surrounds a fingerprint sensing region. The method includes determining whether the first touch is within the fingerprint sensing region, the fingerprint sensing region including a sensing surface of a fingerprint sensor. The method includes determining a first fraction of the fingerprint sensing region covered by the first touch and determining whether the first fraction exceeds a first threshold. The first threshold is a majority of the fingerprint sensing region. The method includes determining a second fraction of all of the first area that is within the fingerprint sensing region and determining whether the second fraction exceeds a second threshold, where the second threshold is a fraction indicative of a majority of an area associated with the corresponding touch. The method includes based on determining that the second fraction exceeds the second threshold, determining whether the first touch is valid.