Wall-mounted electronic whiteboard: Wall-mounted electronic whiteboard needs to build a darkroom to place the projector and embed the rear projection screen into the wall. Embedded wall can save space to the maximum extent and create an open and professional working environment. The smart board is embedded in the wall, the projector is placed in the darkroom in the wall to project from the back, the speaker can stand directly in front of the whiteboard without blocking the light, the back projection is embedded in the wall, and the external push-pull movable blackboard is integrated, which is very convenient to use and store. This scheme is suitable for newly-built schools.
Cabinet whiteboard: Cabinet whiteboard can move the whole equipment from one room to another, or place it firmly in a certain position by adjusting the casters of the cabinet. The multifunctional smart board is embedded in the cabinet frame, the projector is placed in the frame and projected from the back, and the speaker can stand directly in front of the whiteboard without blocking the light. Computers and VCDs can also be placed in the rack, and the overall structure is compact and concise. After the first installation, you can push it around without reinstalling it. The interactive whiteboard can communicate with the computer, connect the whiteboard to the PC, and use the projector to project the contents of the PC onto the screen of the whiteboard. At this time, the whiteboard is equivalent to a particularly large handwriting board, on which you can write and draw at will, display it on PC immediately, and save the file as a graphic file. This function generally needs the support of special whiteboard software. The PC can be connected with printers, digital kiosks and other devices to realize real-time video recording, physical display and printing. If you use a specific application, such as Microsoft's NETMEETING, the interactive whiteboard can communicate with other offices and conference rooms through the network to realize the network meeting.
According to the technical principle, there are four kinds of interactive electronic whiteboard, and the development process of the four technologies is as follows:
Pressure sensitive whiteboard → electromagnetic whiteboard → infrared whiteboard → optical whiteboard.
With the development of technology, the pressure-sensitive electronic whiteboard has been completely eliminated because of its inaccurate positioning, strong usability and inconvenient use for users. Electromagnetic electronic whiteboard improved the problem of inaccurate positioning of pressure sensing technology, which was once very popular in the market. However, due to the inability to achieve manual touch, special pens are needed, and the consumption of consumables is large. With the development of new technology, electromagnetic electronic whiteboard is gradually being eliminated and replaced by new technology.
The following mainly introduces two mainstream technologies of electronic whiteboard in the market, infrared electronic whiteboard and optical electronic whiteboard. The principle of infrared whiteboard is to achieve the positioning effect through a circle of infrared borders around the whiteboard.
The infrared frame sends signals from the X-axis and Y-axis, and the other side receives them. If it is blocked by a finger, it will sense the touch position of the finger, thus achieving the positioning effect.
By the end of 20 13, an infrared electronic whiteboard with fan-shaped emission signal has appeared, which can avoid the problem that one or two infrared lamps fail to receive.
The advantage of infrared electronic whiteboard lies in the effect that direct handwriting or any object can replace the pen. The operation feels a bit like an IPAD. Generally, it is widely used in preschool education, business and other fields.
Disadvantages: it can't provide accurate writing effect of blackboard writing, and it must be written one by one. At the same time, the wrist or other objects entering the infrared frame will cause misoperation. At the same time, the infrared electronic whiteboard will be disturbed by the strong light in front of the screen. The optical electronic whiteboard adopts the latest optical image sensing technology, which inherits the advantages of infrared electronic whiteboard and corrects its shortcomings. It is free from the interference of strong light in front of the screen, with high touch accuracy and smooth writing, which can completely conform to the usual writing habits without any delay. As of 20 13, it is widely used in schools, training and conferences.
Optical electronic whiteboard is an advanced human-computer interaction device for education or conference. Can cooperate with projectors, computers and other tools to achieve dust-free writing, random writing, remote communication and other functions.
Basic parameter
The most influential and intuitive basic parameters of electronic whiteboard are:
1) computer interface: universal USB interface of international standard.
2) Resolution: Resolution refers to the number of points (or pixels) on each line. Points are usually represented along the horizontal and vertical edges of a screen or monitor; The higher the resolution, the clearer and smoother the picture.
3) Calibration method: Generally, the calibration points should be at least 2 points, which is more accurate, free from drift and quick in response.
4) Response speed: The faster the response speed, the closer it is to people's usual habits, and the use is convenient and fast;
5) Touch accuracy: The higher the accuracy, the more sensitive the touch.