The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2007
Filed:
Oct. 23, 2002
Ching-chuan Chao, SanChung, TW;
Chung-wen Hsu, KaoHsiung, TW;
Ching-Chuan Chao, SanChung, TW;
Chung-Wen Hsu, KaoHsiung, TW;
Waltop International Corp., Hsin-Chu, TW;
Abstract
The invention, an improved device and method for the pointer system of a digitizer tablet, is to repetitiously emit signals sequentially from a specific set of inductive loop when the position pointed by the wireless pointer device is located within a range formed by this specific set of inductive loop induced most intensively during a locally scanning process. After a transient energy storage of the wireless pointer device, corresponding resonant signals are emitted out and are received sequentially by several sets of inductive loop located on the digitizer tablet in the neighborhood of this specific set of inductive loop and, by these signals, the wireless pointer device's coordinate position on the digitizer tablet is calculated out relatively. Thereby, the intensities of the resonant signals received by these several sets of inductive loop will be displayed as a linear distribution, such that the calculation formula for coordinate position and the design for relative circuit elements may be simplified greatly, and the production cost and the power consumption may further be lowered down effectively.