What is an electronic whiteboard

The electronic whiteboard is a high-tech product that integrates high-tech means such as advanced electronic technology, software technology, etc. It can realize paperless office and teaching through the application of electromagnetic induction principle, combined with a computer and a projector. The electronic whiteboard is developed from an ordinary whiteboard. The earliest electronic whiteboard was a copy-type electronic whiteboard. With the development of technology and the needs of the market, an interactive electronic whiteboard has emerged. Currently, these two types of electronic whiteboards coexist in the market. The following describes the two types of electronic whiteboards.

Copy-type whiteboard The so-called copy-type whiteboard means that the contents of the whiteboard can be scanned and printed out in a certain way by the user's simple operation. The function completion process is the same as the ordinary copying process. First, the image sensor device collects the content on the whiteboard. After the acquired signal is subjected to a certain image processing, it is finally output by thermal, ink-jet, or other printing methods. The output paper is generally A4 format. The image sensor of the electronic whiteboard is generally a CCD, and the scanning mode uses CCD module motion or whiteboard film motion. The print output method generally has a thermal paper output and an inkjet plain paper output, and there are two types of black and white and color output on the color. In addition to the copying function, some manufacturers also added the function of connecting with the computer on this basis, and then the contents of the whiteboard can be scanned into the computer. The function is equivalent to a scanner. At present, copy-type electronic whiteboard manufacturers Panasonic, Antarctica, Antarc and PLUS, priced at around 10,000. The copying function of the copying whiteboard is actually not much practical. Selecting a good product with high quality and cost performance should be the first choice.

Interactive whiteboard The interactive whiteboard can communicate with the computer, connect the electronic whiteboard to the PC, and use the projector to project the contents of the PC onto the whiteboard screen. With the support of a dedicated application, you can construct a Large screen, interactive collaborative meeting or teaching environment. Using a special positioning pen to operate on a whiteboard instead of a mouse, any application can be run, and any operation that can be performed on a computer using a keyboard and a mouse can be performed such as editing, commenting, and saving.

The interactive whiteboard of the electronic whiteboard also supports copying. The electronic whiteboard is directly connected with the printer, and the board is written by a specific whiteboard pen. When printing is required, the printer can print in color or black and white by simply pressing the print button on the panel. It can also be used as a PC whiteboard to connect the electronic whiteboard with a PC. At this time, the electronic whiteboard is equivalent to an extremely large handwriting board, which can be freely written, drawn, and instantly displayed on a PC. The file is saved as a graphic file. . This feature generally requires a dedicated application support. If you use a specific application program such as MICROSOFT's NETEMEETING, the interactive whiteboard can communicate with other offices and conference rooms through the network to achieve web conferencing.

The interactive whiteboard is an advanced education or conference-assisted human-machine interactive device. It can cooperate with projectors, computers and other tools to achieve dustless writing, free writing, and remote communication. From the perspective of the structure, there are various types of front-projection, rear-projection, and writing boards. From the hardware principle, the interactive whiteboard incorporates large-screen projection technology and precise positioning testing technology. At this stage of the international or domestic market, there are a variety of technologies to achieve the precise positioning of the electronic whiteboard, the representative is the infrared, electromagnetic induction, resistance, ultrasonic, CCD and other technologies. Each technology has different characteristics and advantages and has a certain share in the market. The analysis report of the international authoritative market research organization shows that in recent years, the electronic whiteboard adopting electromagnetic induction technology has gradually taken the leading position in the international market. Antarc, Antarc, etc. account for more than 1/2 of the market share, followed by infrared sensing and ultrasound. Sensing technology occupies approximately 1/6 of the market share.

Working principle The working principle of electronic whiteboard is divided into two kinds of pressure sensing principle and laser tracking principle. The touch-sensitive whiteboard using the pressure-sensing principle is equivalent to a touch screen of a computer, and is a human-machine interactive input device that accomplishes designated work with a finger or a pen touch and an option displayed on the screen. This type of electronic whiteboard has two layers of pressure-sensitive film. When a certain point on the surface of the whiteboard is stressed, two layers of film cause a short circuit at this point, and the controller of the electronic whiteboard detects the coordinates of the pressure point (finger or stroke). Position), sent to the computer via the RS232 interface. Each laser emitter on both sides of the upper end of the whiteboard using the principle of laser tracking. After the whiteboard is started, the laser transmitter emits a laser to scan the surface of the whiteboard. The special pen has the function of inducing the laser to feed back the position of the pen.

There are many kinds of electronic whiteboards that work. There are only two types mentioned above, and they are biased. Baidu Encyclopedia's open style of editing is difficult to describe impartially. Just as I can put this phrase into it, other people can also add content that they approve, and of course they can also delete content that is unfavorable to them.