Touch position detection apparatus and method using multistage scan

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.