Patent ID: 8648831
Filing Date: 2014-02-11
Classification: G06F

Abstract:
1. A touch position detection apparatus using multistage scan, comprising: a scan lines combination circuit, used to select a portion of a third group of scan lines for connection with a second group of scan lines, as to select a touched sub area of a sensor device, wherein said third group of scan lines is coupled with said sensor device; a scan lines connection circuit, used for controlling the connection configurations between a first group of scan lines and said second group of scan lines according to a scan lines connection control signal, to determine an equivalent resolution distribution of said touched sub area; a touch scan unit, used for selecting a portion of said first group of scan lines according to a resolution programming signal for detecting an interim touch coordinate, and outputting said interim touch coordinate through a first coordinate signal; and a touch coordinate decision unit, having a scan lines combination circuit operation stage and a sub area scan stage, wherein said sub area scan stage has a plurality of operation stages, said touch coordinate decision unit being used for: determining the status of said scan lines combination circuit control signal and detecting a touched sub area coordinate when in said scan lines combination circuit operation stage; determining the status of said scan lines connection control signal and the status of said resolution programming signal according to said operation stages, and receiving a plurality of said interim touch coordinates through said first coordinate signal detected in said operation stages when in said sub area scan stage; and summing up said touched sub area coordinate and said interim coordinates; wherein said touch scan unit has different scan frequencies for different operation stages of said plurality of operation stages.