Invention Grant
- Patent Title: Support of narrow tip styluses on touch screen devices
-
Application No.: US16223428Application Date: 2018-12-18
-
Publication No.: US10852879B2Publication Date: 2020-12-01
- Inventor: Praveesh Chandran , Manivannan Ponnarasu , Mythreyi Nagarajan
- Applicant: STMicroelectronics Asia Pacific Pte Ltd
- Applicant Address: SG Singapore
- Assignee: STMicroelectronics Asia Pacific Pte Ltd
- Current Assignee: STMicroelectronics Asia Pacific Pte Ltd
- Current Assignee Address: SG Singapore
- Agency: Crowe & Dunlevy
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/0354 ; G06F3/044

Abstract:
A touch screen controller identifies an island in a matrix of acquired touch data values. A first sharpness of the island is calculated and a second sharpness of the island is calculated if the calculated first sharpness is greater than a sharpness threshold. A dynamic strength threshold is then determined as a function of the second sharpness if a variance of the island is greater than a dynamic variance threshold. A determination is then made that the identified island is a valid stylus island if a peak strength of the island is greater than the dynamic strength threshold.
Public/Granted literature
- US20190121488A1 SUPPORT OF NARROW TIP STYLUSES ON TOUCH SCREEN DEVICES Public/Granted day:2019-04-25
Information query