Vivitek DW771USTi Projector, 1280 x 800 WXGA, 3500 Lumen

With a brightness of 3,500 lumens and WXGA resolution, the DW771USTi is the ultimate interactive ultra-short-throw projector for educational institutions. The projector delivers a 2.15-metre-wide projection image with a diagonal of 100 inches at a projection distance of just 44 cm. The DW771USTi impresses not only with its outstanding image quality, but also with its superb sound quality thanks to the two built-in 10 W speakers. The DW771USTi supports multiple users thanks to its dual-pen functionality and an optional 10-point finger-touch unit. The interactive pen requires no HID driver and can be used just like a computer mouse without any additional installation. This projector is a robust alternative to flat screen displays with a 100-inch screen size.

DLP (Digital Light Processing) is a projection technology developed by Texas Instruments (TI). At the heart of this technology is the DMD (Digital Micromirror Device). The DMD consists of an array of micromirrors, each of which represents a pixel. For example, a DLP projector or rear-projection screen with 1920 x 1080 pixels (HD resolution) has 2 million tiny mirrors. Each individual mirror can be tilted electronically. This allows, for example, the control of multi-coloured light.

HDMI (High Definition Multimedia Interface) is a lossless, fully digital audio/video interface for A/V devices such as set-top boxes, DVD players, A/V receivers and playback devices such as digital projectors and digital televisions (DTV). HDMI is backwards compatible with DVI 1.0 and supports HDCP.