Touch input device

a technology of input device and touch sensor, which is applied in the direction of instruments, computing, electric digital data processing, etc., can solve the problems of difficult to identify the position degrade the quality of displayed images, and difficult to detect the location of the stylus on one set of electrodes, so as to reduce the effect of the touch sensor device on the output of an underlying display device, reduce the effect of capacitance change, and reduce the effect of the touch sensor
US20090273572A1Inactive Publication Date: 2009-11-05INNOLUX CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
INNOLUX CORP
Publication Date
2009-11-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

A touch sensor input device includes a first and second array of electrodes, the electrodes in the first array being orthogonal to the electrodes in the second array. A capacitor sensing arrangement senses an electrode capacitance signal which varies in the presence of a touch input. The capacitance signals for groups of electrodes in each array are combined in order to derive respective individual sense signals. This arrangement has electrodes with a finer resolution than the sensing resolution, and this gives improved ability to sense accurately the position of the touch input.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Provisional Application No. 61 / 125,917, filed on Apr. 30, 2008, and U.S. Provisional Application No. 61 / 125,963, filed on Apr. 30, 2008, the entirety of which are incorporated by reference herein.

[0002] This application claims priority of EP Patent Application No. 09152695.4, filed on Feb. 12, 2009, the entirety of which is incorporated by reference herein.BACKGROUND OF THE INVENTION

[0003] 1. Field of the Invention

[0004] This invention relates to touch input devices, for example for use in display devices with touch screens.

[0005] 2. Description of the Related Art

[0006] Touch screens are becoming increasingly common in consumer electronics applications where an LCD display is present in a device e.g. mobile phone, PDA or camera. User interaction via a touch screen saves the space required for key inputs and therefore allows a larger display area for a given size of device. The touch screen provides a...

Claims

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