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US 8,970,529 B2Granted
Touch sensor panel using oscillation frequency
AssigneeInterflex Corporation
InventorsJai-Kyung Kim, Kwang-Sik Lee
Life of this patent
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Abstract
Disclosed are a device and a method of sensing a touch using an oscillation circuit. Touch sensor lines that detect a position by using a resistor and a capacitor of an RC oscillation circuit face each other to make pairs in a panel, and an oscillation frequency generated according to capacitance of the panel which is changed by a touch is measured through the adjacent touch sensor lines and two or more characteristics of the measured oscillation frequency are calculated to determine the touched position.
Claims16
A touch sensor panel, comprising:
- a substrate;
- a plurality of first sensor lines formed on the substrate in one direction, the first sensor lines having respective first signal connection points;
- a plurality of second sensor lines spaced apart from the first sensor lines and formed between the first sensor lines, the second sensor lines having respective second signal connection points;
- a first signal line;
- a second signal line;
- an oscillation circuit that is alternately connected to the first signal connection points of the first sensor lines via the first signal line and to the second signal connection points of the second sensor lines via the second signal line, the oscillation circuit generating first oscillation frequencies when connected to the first signal connection points and generating second oscillation frequencies when connected to the second signal connection points;
- and
- a calculator connected to the oscillation circuit, and determining a touch position by comparing the first oscillation frequencies and the second oscillation frequencies,
- wherein an extending direction of the first sensor lines from the first signal connection points is opposite to an extending direction of the second sensor lines from the second signal connection points.
6 more elements
Dependencies are inferred from the claim text.