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Display to touch crosstalk compensation

A technology of crosstalk compensation and display, applied in the input/output process of data processing, instruments, calculations, etc.

Active Publication Date: 2012-07-25
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fundamentally reducing or eliminating crosstalk so that touch-sensitive devices can effectively and efficiently perform touch and hover operations is challenging.

Method used

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  • Display to touch crosstalk compensation
  • Display to touch crosstalk compensation
  • Display to touch crosstalk compensation

Examples

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Embodiment Construction

[0023] In the following description of example embodiments, reference is made to the accompanying drawings, in which specific embodiments that may be practiced are shown by way of illustration. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the various embodiments.

[0024] The present invention relates to touch sensitive displays that can compensate for crosstalk between touch and display components. The touch-sensitive display may include an active area of ​​pixels having display components for displaying graphics and / or text data during the display mode of the display and touch sensing elements for sensing touch or hover events during the touch mode of the display. part. During touch mode, some display components, such as thin film transistors (TFTs), introduce crosstalk that interferes with touch signals, where the amount of crosstalk can depend on the displayed image of graphical and / or...

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PUM

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Abstract

A touch sensitive display capable of compensating for crosstalk in the display is disclosed. Crosstalk in display components can be reduced, eliminated, or otherwise compensated for by reducing or eliminating parasitic capacitances that cause the crosstalk. To do so, gate voltages to the display components, such as thin film transistors (TFTs), that introduce the parasitic capacitances can be reduced or otherwise adjusted. In one approach, the gate voltage can be set at multiple different low levels to generate respective sets of touch signals having different amounts of crosstalk. The different crosstalk amounts can then be used to determine and compensate for the crosstalk in the touch signals. In another approach, gate voltage can be modulated between multiple different low levels to push crosstalk out of band with the generated touch signals. The out-of-band crosstalk can then be used to compensate for the crosstalk in the touch signals.

Description

technical field [0001] The present invention relates generally to touch sensitive devices, and more particularly to compensation for crosstalk between display and touch components in touch sensitive devices. Background technique [0002] Many types of input devices can be used to perform operations in a computing system, such as buttons or keys, mouse, trackball, touch sensor panel, joystick, touchpad, touchscreen, and so on. Touch-sensitive devices and especially touch screens are becoming more and more popular due to their ease and variety of operation and their falling prices. A touch-sensitive device may include a touch sensor panel, which may be a clear panel with a touch-sensitive surface, and a display device such as a liquid crystal display (LCD), and the display device may be partially or completely behind the panel or Integrate with the panel so that the touch-sensitive surface can substantially cover the viewable area of ​​the display device. Touch-sensitive dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/0412G06F3/0418G06F2203/04107G06F3/04182G06F3/0443G06F2203/04101
Inventor C·H·克拉
Owner APPLE INC
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