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Touch device and sensing compensation method

A touch control device and compensation method technology, which are applied in the fields of instruments, electrical digital data processing, and data processing input/output processes, etc., can solve the problems of signal bandwidth limitation, reduced signal-to-noise ratio of sensing signals, and reduced sensitivity, etc.

Active Publication Date: 2017-12-26
HANNSTAR DISPLAY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is a small-sized or large-sized projected capacitive touch panel, there is a delay problem caused by parasitic resistance and parasitic capacitance
The delay caused by this parasitic resistance and parasitic capacitance will limit the signal bandwidth
For example, the touch panel has a non-negligible signal bandwidth limitation due to the too large parasitic resistance of the sensing wire (usually a transparent conductive wire, such as an indium tin oxide (ITO) wire).
This bandwidth limitation will cause the scanning speed of the panel drive circuit to the touch panel to be unable to increase, so that the user will feel a delay when operating.
In addition, if the parasitic resistance and capacitance are too large, the sensitivity to changes in the mutual capacitance of the touch unit in the touch panel will be reduced, resulting in a decrease in the signal-to-noise ratio of the sensing signal.

Method used

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  • Touch device and sensing compensation method
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  • Touch device and sensing compensation method

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Embodiment Construction

[0057] As used throughout this specification (including the claims), the term "coupled" may refer to any connection means, direct or indirect. For example, if it is described in the text that a first device is coupled to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected through other devices or some kind of connection means. indirectly connected to the second device. In addition, wherever possible, elements / components / steps using the same reference numerals in the drawings and embodiments represent the same or similar parts. Elements / components / steps using the same symbols or using the same terms in different embodiments can refer to related descriptions.

[0058] figure 1 It is a schematic diagram illustrating an equivalent circuit of a touch device 100 according to an embodiment of the present invention. The touch device 100 includes a driving circuit 110 , a touch panel 120...

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Abstract

A touch device and a sensing compensation method are provided. The touch device may include a touch panel, a sensing compensation circuit and a sensing circuit. The sensing compensation circuit may be coupled to the touch panel for providing a compensation-impedance according to features of the touch panel. The sensing circuit may be coupled to the sensing compensation circuit. The sensing circuit receives touch information compensated by the sensing compensation circuit.

Description

technical field [0001] The present invention relates to an electronic device, and in particular to a touch device and a sensing compensation method. Background technique [0002] With the vigorous development of smart phones and tablet computers, projected capacitive touch panels have gradually replaced traditional keyboards and mice as the main input interface. Whether it is a small-sized or a large-sized projected capacitive touch panel, there is a delay problem caused by parasitic resistance and parasitic capacitance. The delay caused by the parasitic resistance and parasitic capacitance will limit the signal bandwidth. For example, the touch panel has a non-negligible signal bandwidth limitation due to the too large parasitic resistance of the sensing wire (usually a transparent conductive wire, such as an indium tin oxide (ITO) wire). This bandwidth limitation will cause the panel driving circuit to fail to increase the scanning speed of the touch panel, so that the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/04182G06F3/044G06F3/0418
Inventor 潘彦霖李威延赵昌博蔡鸿铭彭玄文
Owner HANNSTAR DISPLAY CORPORATION