Electronic handwriting pen with function of detecting pressure value

An electronic hand, pressure value technology, applied in the direction of electrical digital data processing, data processing input/output process, instruments, etc., can solve the problem of unable to solve the pressure value acquisition, and achieve rich changes in handwriting, low cost, and increased pressure. effect of sensory function

Inactive Publication Date: 2010-06-09
BEIJING IE MARK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main function of the pressure sensor here is to judge the writing state of the pen, n...

Method used

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  • Electronic handwriting pen with function of detecting pressure value
  • Electronic handwriting pen with function of detecting pressure value
  • Electronic handwriting pen with function of detecting pressure value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Using a resistance strain gauge as a pressure sensor

[0038] image 3 , Figure 4 When the resistance strain gauge is used as the pressure sensor, the installation structure of the strain gauge and the structure of the basic detection circuit are given. In the figure, 301 is an arched beam used to amplify the writing pressure of the nib. One end of the arched beam is installed on the bracket 104 inside the pen, and the other end is connected to the end of the nib. It can be fixed, hinged, or suspended, as long as the pressure of the nib is guaranteed. It can be smoothly transferred to the bow beam. There is a gap 304 at the opening of the arched beam to ensure that the arched beam can be deformed under the pressure of writing, but the deformation will not be too large to exceed the elastic range of the beam, resulting in plastic deformation of the beam. 302 and 303 are two strain gauges, which are respectively installed on the inner and outer surfaces of ...

Embodiment 2

[0039] Example 2: Using a Hall element as a pressure detection sensor

[0040] See Figure 5 and Image 6 . Hall elements that can output continuous analog quantities are widely used in the detection of small displacements. In the present invention, under the combined action of writing pressure and the reaction force of the elastic element inside the pen, the writing pressure can be detected by driving the magnet or Hall element to move. Figure 5 A detection structure using Hall element as sensor is given. exist Figure 5 Among them, the Hall sensor 501 is that the Hall sensor is installed between the magnetic poles of the same polarity of two sheet magnets 502, 503, and two magnets, one is installed on the bracket in the pen, and the other is installed on the pen head. end. Here, the repulsive force between the magnetic poles of the same sex is used as the restoring force for the reset of the nib, that is, the nib returns to the position when the nib is not written aft...

Embodiment 3

[0043] Example 3: Using an electret microphone as a pressure detection sensor

[0044] like Figure 7 As shown, the common electret microphone (electret microphone) can also be used for the detection of the writing pressure of the nib. 701 is an elastic airbag; 702 is an electret microphone; the electret sensor is composed of an elastic airbag 701 and an electret microphone 702. One end of the elastic airbag 701 is closed and the other end is open, and the open end is airtightly connected with the electret microphone 702, and the electret microphone goes deep into the airbag; the other end of the elastic airbag is installed at the end of the nib. In this structure, the outer wall of the elastic airbag 701 is used as the elastic element mainly supporting the nib, which generates a restoring force under the writing pressure; the air in the elastic airbag is used as the transmission medium of the writing pressure, and the pressure is applied to the microphone when the airbag is ...

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Abstract

The invention relates to a pressure-sensitive handwriting pen, which comprises a continuous quantity pressure sensor arranged in a pen point and a front-end adapter circuit, a signal conditioning circuit and an output unit for outputting wired or wireless signals which are matched with the pressure sensor, wherein the continuous quantity pressure sensor has a unique mapping relationship between an output value and pressure. The pressure-sensitive handwriting pen can use a resister strain foil, a Hall element, an electret capacitor or an electret microphone, a variable capacitor and a variable inductor as a pressure sensor element, and aiming at handwriting light pens and handwriting ultraphonic pens, provides an implementation scheme that by utilizing the conventional infrared transmission unit on a handwriting pen, handwriting pressure data and the original signal system are integrated to transmit pressure data. By applying the pressure-sensitive handwriting pen, on one hand, the change of calligraphy is more abundant and is closer to natural writing, and on the other hand, the application of handwritten input products on aspects of calligraphy, painting and the like and particularly the pressure-sensitive handwriting on display screens is expanded. Various sensors used by the pressure-sensitive handwriting pen have the advantages of low cost and simple adapter circuit, and thus the pressure-sensitive handwriting pen is suitable to be popularized and used.

Description

technical field [0001] The invention relates to an electronic stylus for an electronic whiteboard or a handwriting board, which belongs to the technical field of computer human-computer interaction equipment, in particular to the technical field of handwriting input hardware for inputting characters and graphics on a computer in a handwriting manner. Background technique [0002] Computer handwriting boards and interactive electronic whiteboards used for online communication, text and graphic input, teaching, and conference systems have been more and more widely used. Existing technologies for such products mainly include resistive film, electromagnetic induction, capacitance, surface acoustic wave, ultrasonic, infrared, image processing and other technologies. Although these technologies can realize the input of handwritten graphics and texts, in some occasions that need to express some writing characteristics of the writer, such as changing the thickness of the strokes thr...

Claims

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Application Information

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IPC IPC(8): G06F3/033G06F3/0354
CPCG06F3/03545
Inventor 刘中华
Owner BEIJING IE MARK TECH
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