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Mutual inductance type capacitive touch screen

A technology of capacitive touch screen and touch screen, which is applied in the direction of electrical digital data processing, instrumentation, calculation, etc., can solve the problem of noise when the output signal is differentiated in time or space, the unsmooth change curve of the mutual inductance capacitance of the touch screen, and the impact on the higher spatial frequency of the touch signal and the resolution of time and frequency to achieve the effect of improving sensitivity and smoothing the change curve of mutual inductance and capacitance

Active Publication Date: 2016-07-20
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a mutual-inductance capacitive touch screen to solve the problem of noise generated when the output signal is differentiated in time or space due to the anisotropic detection characteristics of the touch screen and the uneven variation curve of the mutual capacitance in the prior art. Thus affecting the resolution of the higher spatial frequency and temporal frequency of the touch signal

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  • Mutual inductance type capacitive touch screen
  • Mutual inductance type capacitive touch screen
  • Mutual inductance type capacitive touch screen

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Embodiment Construction

[0032] The implementation process of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings of the specification.

[0033] In the first embodiment of the present invention, a mutual-inductance capacitive touch screen includes a driving line, a sensing line, and an electrode structure. The electrode structure includes a first electrode and a second electrode. The first electrode is connected to the driving line of the touch screen, and the second electrode is connected to the touch screen. The sensing line is connected; or, the first electrode is connected to the sensing line of the touch screen, and the second electrode is connected to the driving line of the touch screen; the electrode structure has isotropic detection characteristics.

[0034] In a preferred embodiment, the electrode structure is such as Figure 4 The ring-shaped electrode structure shown and the connection relationship with the driving line and the...

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Abstract

The invention discloses a mutual inductance type capacitive touch screen, comprising a drive line, an induction line and an electrode structure, wherein the electrode structure comprises a first electrode and a second electrode, the first electrode is connected with the drive line of the touch screen, and the second electrode is connected with the induction line of the touch screen; or, the first electrode is connected with the induction line of the touch screen, and the second electrode is connected with the drive line of the touch screen; and the electrode structure has isotropic detection characteristics. The mutual inductance type capacitive touch screen disclosed by the invention has the following beneficial effects: most area between the induction line and the drive line is filled with electrodes of circular curves or a plurality of straight lines, so the electrodes have the isotropic detection characteristics, and an mutual inductance capacitance variation curve between the electrodes is smooth, so the sensitivity of detecting a touch signal and the resolution of the obtained touch signal are improved.

Description

[0001] The application for the present invention is a divisional application of the invention application whose filing date is December 11, 2012, the application number is 201210533695.0, and the invention title is "a mutual-inductance capacitive touch screen". Technical field [0002] The invention relates to a mutual inductance capacitive touch screen, and in particular to an electrode structure of a mutual inductance capacitive touch screen. Background technique [0003] Capacitive touch screens can be classified into self-inductance capacitive and mutual capacitive touch screens according to the mode of detecting touch signals. A mutual inductance capacitive touch screen is composed of a plurality of driving lines and a plurality of sensing lines perpendicular to it. A mutual inductance capacitance is formed between the driving lines and the sensing lines. The overlapping part of the capacitance between the driving lines and the sensing lines cannot be touched by external objec...

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Application Information

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IPC IPC(8): G06F3/044G06F3/041
CPCG06F3/0418G06F3/044G06F2203/04112
Inventor 黄忠守
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD