Touch panel controller, touch panel system and method of operating touch panel system

Abstract

A touch panel system in which power consumption is reduced, detection sensitivity is enhanced, a controller for the touch panel system, and a method of operating the system. Touch panel system includes status detecting portion having status signal generating portions generating a status signal indicative of a close status of an indicator, a position calculating portion processing the status signal, thereby calculating a position of the indicator on a detecting surface, and a region setting portion for updating an effective region set in the detecting surface P based on the position of the indicator which is calculated by the position calculating portion. A first operation causes the status signal generating portions SL and DL to selectively generate a status signal and a second operation causes the position calculating portion to selectively process the status signals generated by the status signal generating portions SL and DL.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a Continuation application to co-pending application Ser. No. 13 / 452,143, filed on Apr. 20, 2012, which is a continuing application filing under 35 U.S.C. §371 of International Application No. PCT / JP2012 / 052249 filed on Feb. 1, 2012, and which claims priority to Japanese Patent Applications No. 2011-200902 filed on Sep. 14, 2011 and No. 2011-246795 filed on Nov. 10, 2011.TECHNICAL FIELD[0002]The present invention relates to a touch panel system provided on a surface of a display device or the like, a touch panel controller for controlling the touch panel system, and a method of operating the touch panel system.BACKGROUND ART[0003]In recent years, a touch panel system for detecting a position of an indicator on a detecting surface (for example, a finger of a user, a styrus or the like, the same shall apply hereinafter) to accept an instruction of the user is often provided on a display surface of a display device such a...

AI Technical Summary

Benefits of technology

The patent describes a touch panel system that uses a controller to set a restrictive area for detecting indicators based on their position. This helps to save power and improve sensitivity by avoiding unnecessary detection.

Problems solved by technology

In the case in which these elements are operated at the same time, there might be caused a problem in that a power consumption is increased, and furthermore, a detection sensitivity is deteriorated due to an occurrence of a noise or the like.

For this reason, a long time is required for detecting the indicator, so that a deterioration in the detection sensitivity might be caused, which is a problem.

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