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Capacitive stylus and capacitive stylus positioning method

A capacitive pen and capacitor technology, applied in the field of electronics, can solve problems such as low coordinate positioning accuracy, and achieve the effect of improving user experience and positioning accuracy

Active Publication Date: 2018-10-16
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even if the capacitive pen moves a certain displacement in one direction, as long as the three TX waveforms can still be received, the capacitive pen will send out the same high-voltage waveform, and the capacitive screen will detect the same signal, and the calculated coordinates will not occur. Any change, resulting in low accuracy of coordinate positioning

Method used

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  • Capacitive stylus and capacitive stylus positioning method
  • Capacitive stylus and capacitive stylus positioning method
  • Capacitive stylus and capacitive stylus positioning method

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Embodiment Construction

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0020] The capacitive pen slides on the capacitive screen (touch screen) (such as figure 1 As shown), the capacitive pen will form a coupling capacitance with TX (sending pole of the capacitive screen) and RX (receiving pole of the capacitive screen) near the capacitive pen, such as figure 2 shown. Taking three TXs and one RX as an example, the relationship between the capacitive pen and the coupling capacitance of TX and RX is as follows: image 3 As shown (the capacitance formed between TX and RX is omitted here, and the inf...

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PUM

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Abstract

The invention discloses a capacitance pen and a capacitance pen locating method. The capacitance pen comprises: a pen point; an excitation waveform receiving module used for receiving a first excitation waveform signal sent by an emitter of a touch screen; and an excitation waveform generation module used for generating a second excitation waveform signal corresponding to each emitter according to the signal strength of the first excitation waveform signal sent by the emitter and emitting the second excitation waveform signal through the pen point. According to the capacitance pen disclosed by the invention, the second excitation waveform signal is correspondingly generated according to the strength of the received first excitation waveform signal, so the touch screen can be located more accurately according to the second excitation waveform signal, and thus the user experience is improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a capacitor pen and a positioning method for the capacitor pen. Background technique [0002] Capacitive pens are mainly divided into two types: active and passive. The passive type is a common soft-tipped thick-tip pen in the industry. When the hand holds this pen, the pen and hand are connected, instead of fingers touching the screen. The capacitance change caused by this passive capacitive pen is small, so it is necessary to use a soft head and a thick head to increase the contact area to increase the capacitance change. But this kind of strokes on the screen does not feel good, and there is no corresponding pressure detection circuit inside, so data such as pressure and keys cannot be measured, and functions such as handwriting recognition cannot be realized. The active pen generally has a built-in battery and chip, and uses the chip to send a high-voltage signal to sti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/0354
Inventor 李振刚郭亮亮黄臣杨云
Owner BYD SEMICON CO LTD