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Photoelectric positioning device for interactive electronic writing display system and calibration method thereof

A technology of display system and positioning device, applied in mechanical mode conversion, electrical digital data processing, input/output process of data processing, etc. Easy self-calibration and high reliability

Inactive Publication Date: 2005-06-29
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their common disadvantages are complex system, high cost and poor reliability.
Although the infrared positioning technology adopted by some companies also belongs to the category of photoelectric positioning, they all adopt the method of installing multiple infrared detection elements around the writing / display board, and then using electronic processing for synthetic analysis and positioning, so the cost is high. Decreased accuracy and greatly reduced reliability

Method used

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  • Photoelectric positioning device for interactive electronic writing display system and calibration method thereof
  • Photoelectric positioning device for interactive electronic writing display system and calibration method thereof
  • Photoelectric positioning device for interactive electronic writing display system and calibration method thereof

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Embodiment Construction

[0028] Image 6 Shown is one of the embodiments of the present invention used in a rear projection display unit. The photoelectric positioning device of this embodiment includes a writing board 101, a photoelectric writing pen 102 and a photoelectric imaging device 103 for capturing the position of the writing pen. The display unit also includes an optical engine 105 for generating display images, an electronic processing unit 104 and a housing 106, wherein the writing board 101 is also a screen for displaying projected images, and can simultaneously display graphics and text formed by the trajectory of the writing pen. The electronic processing unit 104 calculates the digital position information of the writing pen from the image collected by the photoelectric imaging device by means of image processing, tracks the position movement of the writing pen, and converts its trajectory into corresponding graphic information. The optical engine 105, the photoelectric imaging device ...

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PUM

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Abstract

This invention discloses a photoelectricity positioning device and its calibration method used in electronic writing system, which comprises writing board, writing pen, and photoelectricity detecting devices used to catch the writing positions. The said detecting device is set behind o r in front of the writing board and direct forms the board image through forming wave and records the writing pen position in the board. It converts the image of the writing pen position into digit information through electronic process. The processed information can be real-time displayed on the projecting screen through signal process.

Description

technical field [0001] The invention relates to a photoelectric positioning device, in particular to a photoelectric positioning device used in an interactive electronic writing display system. The invention also relates to a calibration method of the photoelectric positioning device. Background technique [0002] With the continuous expansion of computer technology applications, the application of electronic writing systems has developed rapidly in recent years, especially the emergence of interactive electronic whiteboards, which has pushed the development of electronic writing systems a big step forward. At present, the writing pen positioning technology adopted by the interactive electronic whiteboard mainly includes: resistive positioning, capacitive positioning, electromagnetic positioning, ultrasonic positioning and infrared positioning technology. Their common disadvantages are system complexity, high cost and poor reliability. Although the infrared positioning tec...

Claims

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Application Information

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IPC IPC(8): G06F3/0354G06F3/041G06K11/06
Inventor 卢如西孟凡华张晓琪杨黎明
Owner GUANGDONG VTRON TECH CO LTD
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