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Interdigitated touchscreen electrodes

An electrode and cross-wire technology, applied in the field of touch screen displays, can solve the problems of resistors needing space, increasing the effective impedance level, and degrading the manufacturing qualification rate.

Inactive Publication Date: 2011-05-04
NEODRON LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, resistors require space, increase cost and also degrade manufacturing yield
It also creates an extra load on the control circuit, consumes more power, and degrades the shielding ability of the electrodes from LCD noise (due to the increased effective impedance level of the electrodes caused by the introduction of voltage divider resistors)

Method used

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  • Interdigitated touchscreen electrodes
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  • Interdigitated touchscreen electrodes

Examples

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Embodiment Construction

[0023] Several embodiments are described. In a first embodiment, a plurality of adjacent drive electrodes for a touch screen generally continue along a first direction. Adjacent driving electrodes may have protrusions extending toward each other. The protrusions may be interleaved or interdigitated to provide one or more interpolated sections of the drive electrode in which the protrusions are interdigitated. In one set of embodiments the drive electrodes may be solid fill conductive regions, and in another set of embodiments are fine line drive electrodes. In other embodiments, the sense electrodes may be interdigitated.

[0024] figure 2 A drive electrode pattern 200 with interpolated interdigitations for a touch screen is illustrated according to an example embodiment. The driving electrodes 210 extend longitudinally along the first direction. The first portion of drive electrode 210 continues for the desired width (shown in parentheses) and corresponds to X coupled to...

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Abstract

Interdigitated touchscreen electrodes. A device includes a plurality of adjacent electrodes for a touch sensitive device. The electrodes run generally in a first direction. Adjacent electrodes are interdigitated to provide one or more interpolation sections of the electrodes. Touch sensitive devices may utilize such interdigitated electrodes as drive electrodes, along with transverse sense electrodes formed over a display.

Description

technical field [0001] The present invention relates to touch screen displays, and more particularly to interdigitated touch screen electrodes for displays. Background technique [0002] Touch screen displays are capable of detecting touches within the active or display area by, for example, a finger or a stylus. Using a touch screen as part of the display enables a user to interact with electronic applications by touching the touch screen. The display can present images to the user. Such images may include user interface constructs, such as different buttons, images, or other areas, that may be selected, manipulated, or actuated by touch. Thus, touch screens can provide efficient user interfaces for cellular phones, GPS devices, personal digital assistants (PDAs), computers, ATM machines, appliances, and other devices. [0003] Touch screens use various technologies to sense touch from a finger or stylus, such as resistive, capacitive, infrared, and acoustic sensors. In...

Claims

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Application Information

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IPC IPC(8): G06F3/041
CPCG06F3/0445G06F3/0446
Inventor 哈拉尔德·菲利普埃萨特·伊尔马兹
Owner NEODRON LTD
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