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Sensing device and method for capacitance type touch control panel

A technology of capacitive touch and sensing devices, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve problems such as changes

Inactive Publication Date: 2009-09-09
EGALAX EMPIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a sensing device and method for a capacitive touch panel. The purpose of the present invention is to process all current changes at the time of touch at the same time, so as to overcome the problem that the noise will change over time

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  • Sensing device and method for capacitance type touch control panel
  • Sensing device and method for capacitance type touch control panel
  • Sensing device and method for capacitance type touch control panel

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Embodiment Construction

[0034] There will be noise on the capacitive touch panel due to human touch, surrounding environment and system noise. In terms of noise generated by human body contact, the noise will vary with the time of contact. Therefore, in order to eliminate noise, the circuit design of traditional capacitive touch panels includes circuits such as filtering and integration. The present invention provides a simple circuit design to eliminate noise.

[0035] see figure 2 , which is a functional block diagram of a sensing device for a capacitive touch panel according to a preferred embodiment of the present invention. The sensing device of the capacitive touch panel described in this embodiment is used to sense the contact input position of a capacitive touch panel 1, so that the subsequent application system (not shown) can compare Executes control of an input handler.

[0036] The capacitive touch panel 1 provided in this embodiment is described in the way of uniaxial position detect...

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Abstract

The invention relates to a sensing device for a capacitance type touch control panel. The capacitance type touch control panel is provided with a first side receiving a first sensing signal and a second side receiving a second sensing signal. The sensing signal comprises a first signal sensing unit, a second signal sensing unit and a controller. The first signal sensing unit and the second signal sensing unit are respectively used for sensing the current variances on the first side and the second side and respectively and simultaneously outputting a first current value and a second current value to the controller. The controller respectively and simultaneously receives the first current value and the second current value through a first analog-digital converter and a second digital-analog converter and obtains the position of a touch point inputted by a user on the capacitance type touch control panel according to the received first current value and second current value.

Description

technical field [0001] The invention relates to the field of touch panels, and more particularly to a sensing device for capacitive touch panels. Background technique [0002] Traditionally, the input of the electronic device is done by keyboard and mouse, but cannot be done in a way of human intuition. After that, the touch panel has been widely used in various large and small electronic devices. At this time, the user can touch the screen on the electronic device with an object such as a hand or a stylus to perform contact input on the electronic device. The sensing device arranged under the control panel senses the position of the touch point, so as to achieve the purpose of operating the touch electronic device. In terms of the mechanism of sensing contact input, touch panels can be classified into resistive, capacitive, acoustic, optical and electromagnetic touch panels; in terms of types of touch panels, they also include touch screens and touchpad etc. [0003] For...

Claims

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Application Information

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IPC IPC(8): G06F3/044
Inventor 张钦富李政翰
Owner EGALAX EMPIA TECH INC