发明名称 |
Multipoint positioning method for touchpad |
摘要 |
A multipoint positioning method for a touchpad including the steps of: scanning a touchpad to retrieve two-dimensional data; calculating an object area and a number of maxima of local maxima in the two-dimensional data; comparing the object area with an area threshold when the number of maxima is larger than 1; and identifying positions of the local maxima as a plurality of contact positions when the object area is larger than or equal to the area threshold. |
申请公布号 |
US9152272(B2) |
申请公布日期 |
2015.10.06 |
申请号 |
US201313973948 |
申请日期 |
2013.08.22 |
申请人 |
PIXART IMAGING INC. |
发明人 |
Chen Hsin-Chia;Su Tse-Chung;Kao Ming-Tsan |
分类号 |
G06F3/044;G06F3/041;G06F3/042;G06F3/0354 |
主分类号 |
G06F3/044 |
代理机构 |
Lowe Hauptman & Ham, LLP |
代理人 |
Lowe Hauptman & Ham, LLP |
主权项 |
1. A multipoint positioning method for a touchpad, comprising:
scanning a touchpad to retrieve two-dimensional data; calculating an object area and a number of maxima of local maxima in the two-dimensional data; comparing the object area with an area threshold when the number of maxima is larger than 1; and identifying positions of the local maxima as a plurality of contact positions when the object area is larger than or equal to the area threshold. |
地址 |
Hsin-Chu TW |