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Active capacitive stylus and touch detection and feedback drive method thereof

A capacitive pen, active technology, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve problems such as vibration, and achieve the effect of easy identification

Inactive Publication Date: 2014-04-16
IPEN TECH +1
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Problems solved by technology

[0007] The second shortcoming is that US patents US20120154340 and US20130002606 both adopt the design that the detection electrode and the driving electrode are separated, and the detection and emission feedback drive are carried out at the same time. If there is no good isolation between the two poles, the transmitted drive feedback signal will be coupled to the detection electrode causing oscillation

Method used

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  • Active capacitive stylus and touch detection and feedback drive method thereof
  • Active capacitive stylus and touch detection and feedback drive method thereof
  • Active capacitive stylus and touch detection and feedback drive method thereof

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Embodiment Construction

[0033] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] Before describing the present invention, first briefly explain the working principle of the touch screen. figure 1 It is a schematic structural diagram of a common touch screen system. The touch screen system includes a touch screen, a touch screen controller and a host. The touch screen includes multiple conductive strips in the X-axis direction and multiple conductive strips in th...

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Abstract

The invention discloses an active capacitive stylus and a touch detection and feedback drive method thereof. The active capacitive stylus comprises a conductive point, a signal processing module and a capacitor. The conductive point is used for detecting a touch screen drive signal transmitted by a touch screen and sending a feedback drive signal output from the signal processing module. The signal processing module is used for processing the touch screen drive signal received by the conductive point and generating a synchronous feedback drive signal. The capacitor is arranged between the conductive point and the signal processing module. During detection, the capacitor is used for coupling the touch screen drive signal acquired by the conductive point to the input end of the signal processing module. When the touch screen is in feedback drive, the capacitor is used for isolating the feedback drive signal. By the touch detection and feedback drive method, the purpose of positioning the position of the conductive point of the active capacitive stylus accurately is achieved.

Description

technical field [0001] The present invention relates to an input device used on a touch screen, in particular to an active capacitive pen and its touch detection and feedback driving method. Background technique [0002] With the development and progress of science and technology, users have higher and higher requirements for the input methods of mobile phones and tablet computers. They are no longer satisfied with traditional keyboard input, and gradually tend to convenient touch input. Currently, the touch input devices on the market are mainly Resistive and capacitive screens. Capacitive screens have the advantages of high sensitivity and easy multi-touch. They are gradually replacing resistive screens as the mainstream touch input screens. They are divided into surface capacitive and projected capacitive. Projected capacitive screens are divided into two types: mutual capacitance (mutual capacitive) and self capacitive (self capacitive). The mutual capacitive touch scre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/0354G06F3/044
Inventor 张剑峰周锡田
Owner IPEN TECH
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