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Touch and hover sensing

A technology for hovering and sensing equipment, which is applied in instrumentation, computing, electrical digital data processing, etc., and can solve the problems of limited hovering detection range, limited practical use of hovering detection information, and low efficiency of hovering information collection.

Active Publication Date: 2012-05-30
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although some touch sensors are also capable of detecting hover events, i.e., objects that are near but not touching the touch sensor, however, general hover detection information of limited practical use

Method used

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Examples

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Embodiment Construction

[0022] In the following description of the embodiments, reference is made to the accompanying drawings which form a part hereof, and in which illustrate specific embodiments that can be practiced. It is evident that other embodiments can be utilized and structural changes can be made without departing from the scope of the embodiments of this disclosure.

[0023] The present disclosure relates to touch and hover sensing, and more particularly to improved capacitive touch and hover sensing. For example, an alternating current (AC) ground shield can be utilized to enhance the hover sensing capability of a sensor array, such as a capacitive touch sensor array. An electrical signal, such as an AC signal, delivered to a capacitive touch sensor array in a touch screen can generate an electric field extending outward from the sensor array across the touch surface to detect a touch on the touch surface or an object hovering over the touch surface . The electric field can also extend...

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Abstract

Improved capacitive touch and hover sensing with a sensor array is provided. An AC ground shield positioned behind the sensor array and stimulated with signals of the same waveform as the signals driving the sensor array may concentrate the electric field extending from the sensor array and enhance hover sensing capability. The hover position and / or height of an object that is nearby, but not directly above, a touch surface of the sensor array, e.g., in the border area at the end of a touch screen, may be determined using capacitive measurements of sensors near the end of the sensor array by fitting the measurements to a model. Other improvements relate to the joint operation of touch and hover sensing, such as determining when and how to perform touch sensing, hover sensing, both touch and hover sensing, or neither.

Description

technical field [0001] The present invention relates generally to touch and hover sensing, and more particularly to improved capacitive touch and hover sensing. Background technique [0002] Many types of input devices are currently available for operating in computing systems, such as buttons or keys, mice, trackballs, joysticks, touch sensor panels, touch screens, and the like. In particular, touch screens are becoming increasingly popular due to their ease of operation and versatility, as well as their decreasing prices. The touch screen may include a transparent touch sensor panel placed in front of a display device such as a liquid crystal display (LCD), or an all-in-one touch screen in which a touch sensing circuit is partially or fully incorporated into a display, or the like. The touch screen may allow a user to perform various functions by touching the touch screen with a finger, stylus, or other object at a location indicated by a user interface (UI) that may be d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044G06F3/048G06F3/041
CPCG06F2203/04101G06F3/0486G06F3/0416G06F3/044G06F2203/04107G06F3/041662G06F3/0446G06F3/04817G06F3/04845
Inventor J·T·伯恩斯坦D·T·阿姆O·勒恩格C·T·马伦斯B·M·金B·R·兰德R·T·库特勒
Owner APPLE INC
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