Capacitive Interactive Whiteboard -- The Dark Horse of Interactive Whiteboard

Posted: Jul. 09th, 2013

What is Capacitive Technology?

Capacitive technology has been known for many years but it did not become the mainstream as a useful and robust user input device until the mid-1990's when it began to be widely deployed as a ‘behind-the-glass’ discrete touch button technology in the high end cooktops and similar devices.

Capacitive technology, which allows an unlimited number of unambiguous touches, produces higher resolution. It is less sensitive to EMI, and can be more efficient in its use of sensor space. Mutual capacitance makes use of the fact that most conductive objects are able to hold a charge if they are very close together. If another conductive object, such as a finger, comes close to two conductive objects, the charge field (capacitance) between the two objects changes because the human body capacitance “steals” some of the charge.

In a mutual-capacitance touch screen, transparent conductors are always patterned into spatially separated electrodes in two layers, usually arranged as rows and columns. Because the intersections of each row and column produce unique touch-coordinate pairs, the controller in a mutual-capacitance touch screen measures each intersection individually. This produces one of the major advantages of mutual-capacitance touch screens – the ability to sense a touch at every electrode intersection on the screen with no blind area.

Capacitive Technology in the Interactive Whiteboard Industry
In the Interactive Whiteboard Industry, Infrared, Optical, Electromagnetic, and Resistive technologies constitute the mainstream, while Capacitive Interactive Whiteboard is hardly seen in the market.

Promethean used to develop Capacitive Interactive Whiteboard. Strictly speaking, it was not real Capacitive IWB, which combined Electromagnetic Technology with Capacitive Technology, allowing one user to write by the electromagnetic pen while others to operate by finger touch.

In 2013, a creative and real Capacitive Interactive Whiteboard was developed by INTECH based on Capacitive Technology, namely, CP series Capacitive Interactive Whiteboard, which changes the Interactive Whiteboard history.

Why did us make this bold attempt? The manager of INTECH Hardware R&D Center Mr. Zheng said, “Capacitive technology has been widely applied in Phone, PC, touch screen and other devices, but it is hardly seen in the Interactive Whiteboard Industry. We want to define this potential technology in a new and different way”.

He also said "Compared with the Infrared Technology, Capacitive Interactive Whiteboard has more advantages, for example, easier support for multi-touch with no blind area. Besides, any objects on the board have no effect on the writing operation. ”

Many manufacturers intend to carry out research into the capacitive touch screen. However, large-size touch screen is extraordinarily expensive. We are committed to promoting our Capacitive Interactive Whiteboard and making it used in every classroom in the world. With its functions similar to the touch screen, Capacitive IWB is cheaper and easier to be accepted.

Capacitive Interactive Whiteboard & Media
INTECH Capacitve Interactive Whiteboard drew great attention when it came into the market. It enjoyed a good reputation at the 64th China Education Equipment Exhibition in Wuhan, and received a lot of positive comments from the visitors who operated the whiteboard. Besides, Capacitive Interactive Whiteboard have been reported in a number of famous magazines and newspapers and have been referred to on many websites as well, such as China Projector Network, Electronic Journal of Education, Huicong Network, Alibaba, etc.

For more information about INTECH Capacitive Interactive Whiteboard, please visit our official website at

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