Capacitive touch panel having approaching sensing function and scan method thereof

A capacitive touch and proximity sensing technology, applied in electrical digital data processing, data processing input/output process, instruments, etc., can solve the problems of increasing difficulty in manufacturing induction coils, increasing manufacturing costs, and small size.

Inactive Publication Date: 2016-01-06
ELAN MICROELECTRONICS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a touch panel of the same size, when the number of the plurality of induction coils increases, the manufacturing difficulty of the plurality of induction

Method used

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  • Capacitive touch panel having approaching sensing function and scan method thereof
  • Capacitive touch panel having approaching sensing function and scan method thereof
  • Capacitive touch panel having approaching sensing function and scan method thereof

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Embodiment Construction

[0086] The technical means adopted by the present invention to achieve the intended purpose are further described below in conjunction with the accompanying drawings and preferred embodiments of the present invention.

[0087] see figure 1 and figure 2 As shown, the capacitive touch panel 10 with proximity sensing function of the present invention includes a touch operation area 11 , a plurality of induction coils 121 , a coil controller 13 and a touch panel controller 14 .

[0088] The plurality of induction coils 121 are arranged at intervals in the touch operation area 11, and are electrically connected to the coil controller 13, and the coil controller 13 respectively outputs a driving signal to each induction coil 121, so that each induction coil 121 generates an electromagnetic field, and each induction coil 121 generates a third-axis induction signal corresponding to its own electromagnetic field change. The coil controller 13 receives the third-axis induction signal...

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Abstract

The present invention provides a capacitive touch panel having approaching sensing function and a scan method thereof. The capacitive touch panel has a touch operation area, multiple sensing coils, a coil controller, and a touch panel controller. The sensing coils are mounted in the touch operation area at intervals. Each of the sensing coils produces a third axial sensing signal according to changes of a magnetic field of itself. The coil controller is electronically connected to each of the coils and the touch panel controller. Either the coil controller or the touch panel controller determines a position of a sensing object according to the third axial sensing signal, and scans a subarea of the touch operation area corresponding to positions of the coils to determine the position of the sensing object. Therefore, the present invention scans partial traces to determine the position of the sensing object. Namely, the present invention can increase scan frequency in unit time to increase scanning accuracy.

Description

technical field [0001] The invention relates to a scanning method of a capacitive touch panel, in particular to a capacitive touch panel with a proximity sensing function and a scanning method thereof. Background technique [0002] The capacitive touch panel in the prior art uses a conductive or charged sensing object to operate on the touch area of ​​the capacitive touch panel, so that the capacitance value of the touch area changes, so as to judge whether the conductive object is in the touch area. The operating position of the touch panel. However, there is another electromagnetic touch panel in the prior art. The electromagnetic touch panel needs to be used with an electromagnetic pen, and includes a plurality of induction coils, and the plurality of induction coils are densely and evenly distributed on the touch panel. touch area. Each of the induction coils will receive a driving signal to generate an electromagnetic field, and when the electromagnetic pen approaches...

Claims

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Application Information

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IPC IPC(8): G06F3/044
Inventor 曾玄文林嘉兴
Owner ELAN MICROELECTRONICS CORPORATION
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