Method and device for detecting touch screen

摘要

A detection method and device for a touch screen is provided. When a pen touching or approaching the touch screen is detected, only the location of the pen in a predetermined range is provided, and the locations of all other objects within the predetermined range are not provided, such as the location of a palm. Only if the pen and all the objects in the predetermined range are no longer detected, then the locations of objects other than the pen in the predetermined range are provided again.

主权项

1. A detection device for a touch screen, comprising:
the touch screen for detecting signals for approaches or touches of external conductive objects thereon; a controller for, when determining at least one external conductive object is a pen based on the signals on the touch screen, recording a location of each pen and areas touched or approached by one or more external conductive objects other than the pen in a predetermined range of the location of each pen; and a memory for storing a flag corresponding to the location of each pen, each flag corresponding to the predetermined range of the location of a corresponding pen, the flag being set to a true value when an existence of the corresponding pen is detected by the controller, and the flag being set to a false value only if the existence of the corresponding pen is not detected, and only if an existence of any external conductive object other than the pen in the corresponding predetermined range is not detected by the controller, wherein an area of the predetermined range is smaller than an area of the touch screen, wherein a plurality of locations of all the external conductive objects other than the pen in the predetermined range corresponding to a flag being set to the true value are not provided by the controller.