Patent ID: 7492358
Filing Date: 2009-02-17
Classification: G06F

Abstract:
1. A resistive touch panel, comprising: a first sheet, comprising a plurality of independent stripes of a first resistive coating, the first sheet being transparent; a second sheet, comprising a second resistive coating separated from the first sheet by a plurality of insulator dots, wherein a voltage difference exists between the second resistive coating and the plurality of independent stripes, wherein the plurality of independent stripes and the second resistive coating form a plurality of independent overlapping regions; and a controller, coupled to the first sheet and the second sheet, the controller configured to detect a contact between the first sheet and the second sheet in at least one of the plurality of independent overlapping regions and scans the plurality of independent stripes and the second resistive coating to determine a position of the contact, wherein the scanning includes: determining the position of the contact in a first direction by measuring a first voltage difference between a first and a second side of each of the plurality of independent stripes, when the current is applied to the first sheet, and determining the position of the contact in a second direction by measuring a second voltage difference between a first and a second side of the second sheet, when the current is applied to the second sheet.