Interactive electric whiteboard system and method for using same

Abstract

The invention discloses an interactive electric whiteboard system. The system consists of an image acquisition device, a projection device, a computer, a wireless receiving device with a USB interface, a whiteboard and an electric whiteboard pen, wherein the image acquisition device and the projection device are all connected with the computer; the computer is connected with the wireless receiving device with the USB interface which is used for receiving a wireless signal from the electric whiteboard pen, sending the wireless signal to the computer and controlling the operation of the computer; the electric whiteboard pen is provided with an infrared transmission device, the light transmitted from the infrared transmission device can form an infrared light spot on the whiteboard, and the infrared light spot is acquired by the image acquisition device and transmitted to the computer by an image acquisition card; the computer can work out the relative position of the electric whiteboard pen projected on the whiteboard; the relative position is utilized to generate an image, and simultaneously the projection device projects the image contents on the whiteboard; and the functions of a keyboard and a mouse can be realized by the electric whiteboard pen.

Description

Technical field: [0001] The invention belongs to the field of image processing, and relates to an interactive electronic whiteboard system and a using method thereof. Background technique: [0002] The electronic whiteboard is a common communication and presentation tool in current conferences and education, which can help express opinions and ideas more intuitively and efficiently. [0003] The electronic whiteboard using the pressure-sensitive input method is equivalent to a touch screen of the computer. When the teacher touches the actual options on the screen with a finger or a pen, the computer will automatically process the corresponding operation. In fact, there are two layers of sensitive film inside this electronic whiteboard. When a certain point on the surface of the whiteboard is under pressure, the two layers of film form a short circuit at this point. The controller of the electronic whiteboard detects the coordinate value of the pressure point and sends it int...

AI Technical Summary

Problems solved by technology

The infrared scanning whiteboard consists of infrared receiving and emitting tubes densely distributed around the display area to form a horizontal and vertical scanning grid, forming a scanning plane network. When an object blocks a certain pair of horizontal and vertical scanning lines in the grid , you can determine the X and Y coordinates through the blocked horizontal and vertical infrared positions. Its disadvantages are: no pressure response, affected by strong light and dust, and the whiteboard pen does not support functions such as the right mouse button, which is difficult for computer operations.

The electromagnetic induction type relies on the principle of radio frequency (RF), and a sensor is installed in the core of the whiteboard to receive a specific frequency signal from an electromagnetic pen to achieve positioning. The disadvantage: a special pen must be used

Resistive piezo-sensitive whiteboard, using resistive film technology, realizes pressure-sensitive positioning by detecting resistance value, its disadvantages: poor durability, fear of scratches, slow response speed, unable to make a large area, whiteboard markers do not support functions such as the right mouse button, etc. computer operation is difficult

The current sensors used for product positioning mainly use piezoelectric, electromagnetic and infrared scanning grid sensors, which makes it difficult to deploy and move the electronic whiteboard. At the same time, the product production process is complicated and the price is relatively expensive.

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