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Touch-sensitive panel apparatus, control circuit and method for scanning touch event

A technology of touch panel and event scanning, applied in instruments, electrical digital data processing, input/output process of data processing, etc., can solve the problems of power consumption and long charging time, and achieve the effect of not sacrificing performance

Active Publication Date: 2015-01-21
WACOM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the known technology, because each circuit loop (loop) in the sensing circuit under the touch panel is continuously powered to scan out the touch position, the method of continuously charging the circuits in different scanning directions has the disadvantage of long charging time and power consumption problem

Method used

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  • Touch-sensitive panel apparatus, control circuit and method for scanning touch event
  • Touch-sensitive panel apparatus, control circuit and method for scanning touch event
  • Touch-sensitive panel apparatus, control circuit and method for scanning touch event

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Embodiment Construction

[0028] Touch panels for handwriting input such as digital boards, digitizers, and electronic whiteboards. A touch object that uses electromagnetic effects to interact with the panel, such as a pen-shaped stylus that is easy to hold and write.

[0029] The stylus disclosed in this manual is like a handwriting input device using electromagnetic effects. The tip of the stylus is the part that touches the touch panel. There are buttons for triggering specific functions. There is an oscillation circuit inside the pen body to determine the frequency of electromagnetic waves.

[0030] The aforementioned touch panel generates a touch event after being touched by the stylus, and generates a touch signal after the electromagnetic induction circuit senses the touch event. The scanning control circuit is used to detect and calculate the electromagnetic induction signal. The signal source judges a touch position, and can judge the operation signal on the stylus.

[0031] In order to prop...

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PUM

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Abstract

Disclosure is related to a touch-sensitive panel apparatus, a control circuit, and a method for scanning touch event. The method is generally adapted to sensing a touch event when a touch object is used to contact a touch-sensitive panel device. The method in the beginning includes performing a time-division scanning process for separately scanning a first sensing region and a second sensing region according to a scanning timing scenario. After that, a triggering zone may be sensed when the scanning process finds a touch event. A full-time scanning process is then performed to the triggering zone. A touching position may be determined according to the scanning process. In one further embodiment, the method then verifies an operating frequency for the touch event so as to confirm a triggering event.

Description

technical field [0001] A touch panel device and a touch event scanning method, particularly a device and a circuit that perform time-division scanning at different frequencies, and have the advantages of energy saving and performance maintenance. Background technique [0002] There are many ways to detect the touch position in the touch panel in the prior art. In addition to the capacitive or resistive sensing panel technology applied to the touch screen of the hand-held electronic device, there is also a sensing circuit under the panel to detect the touch position. The specific electromagnetic conductor on the panel is close to the signal sensing technology, which is commonly used in touch input devices such as digital boards (Tablet), digitizers (Digitizer), and electronic whiteboards (White board). [0003] In the known technology of using the electromagnetic effect of a specific object or using the static electricity of a finger to sense the touch position, a control and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/046G06F3/0416G06F3/044G06F3/04166G06F3/041661G06F3/0446
Inventor 陈昌贤黄志弘
Owner WACOM CO LTD
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