While it's the projected video and graphic images that is meant to grab your attention, the projectors themselves usually go unnoticed.   But there is a new trend in projection systems that will make you sit up and take notice: projectors that connect wirelessly to a PC.

Since they first appeared on the market in mid-2001, wireless projectors are making regular appearances in new product announcements from manufacturers such as Epson America, InFocus, NEC USA, Matsushita Electronic, Sony Electronics e-solutions and Toshiba.      

First, let's consider how all this works.  Basically, the projector comes with a built-in wireless LAN or socket for a WLAN card.  The projector is wirelessly controlled and display data is received wirelessly over the network via any type of PC, from handheld to desktop to remote server.  In a typical business meeting the presenter is free to move about and is no longer tethered to the PC or projector.  The presenter can actually move anywhere in the room when using a PDA or notebook with built-in wireless capability.

However, wireless projectors are not without their limitations.  Virtually all wireless projectors today use Wi-Fi connectivity, although some Bluetooth models made it to market before Wi-Fi - the IEEE 802.11b WLAN standard - became widespread.  Wi-Fi provides better range and bandwidth, up to 150 feet depending on the required bandwidth.  Yet the 802.11b version, at 11 MHz, supports at best very limited PowerPoint animations.  It remains for the emerging 802.11a, 20-25 MHz, standard to support high-speed animation and limited video, and eventually, 802.11g at 54 MHz, to provide the bandwidth needed for full motion video.  So, consider the bandwidth needs of your presentation before cutting the cord to your projector completely.

One advantage of wireless projectors on your network is that they allow multiple PCs to connect to one projector or for one or more PCs to use multiple projectors.  The improved effectiveness of PC-based collaborative activities afforded by wireless projectors in turn improves projector ROI. 

In addition to enhancing presentations, collaborative work and other display applications, wireless projectors, by virtue of networking, provide effective system and asset management.  The projector becomes just another managed device on the network.  For example, a network manager can use the network to monitor projector use and performance.  Software packages for this purpose, such as InFocus' ProjectorNet and Boxlight's Projector Director, enable the support staff to setup, manage, and monitor many projectors from a central point.  Periodically or on-demand, the software collects data on projector power on/off conditions, lamp life, display settings, and current use status.

Linda Musthaler is a principal analyst with Essential Solutions Corporation.