Invention Grant
- Patent Title: Touch control apparatus and touch point detection method
- Patent Title (中): 触摸控制装置和触摸点检测方法
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Application No.: US12637159Application Date: 2009-12-14
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Publication No.: US08558804B2Publication Date: 2013-10-15
- Inventor: Yung-Wei Chen
- Applicant: Yung-Wei Chen
- Applicant Address: TW Jhubei, Hsinchu County
- Assignee: Silicon Motion, Inc.
- Current Assignee: Silicon Motion, Inc.
- Current Assignee Address: TW Jhubei, Hsinchu County
- Agency: McClure, Qualey & Rodack, LLP
- Main IPC: G06F3/041
- IPC: G06F3/041

Abstract:
A touch control apparatus, having a touch pad receiving contact from at least one object is provided. Four edges form a rectangle that encircles the touch pad. All the edges are surfaced with geometric textures. A first camera is deposited on a corner of the first edge and the fourth edge of the rectangle, having a field of view sufficient to collect a first image including the second edge and third edge of the rectangle. A second camera is deposited on a corner of the second edge and the fourth edge of the rectangle, having a field of view sufficient to collect a second image including the first edge and third edge of the rectangle. A calculation unit performs a characteristic extraction process on the geometric textures of the first and second images to determine whether an object has touched the touch pad, and if so, coordinates thereof are determined.
Public/Granted literature
- US20110141030A1 Touch Control Apparatus and Touch Point Detection Method Public/Granted day:2011-06-16
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