Displays and Interactive Images
9. Interactive Images Ultrashort throws open up a range of new applications for projectors. Hitachi, for example, pairs an ultrashort-throw projector with a touch-screen whiteboard, to give you a touch-screen interface with the ability to select menu options, draw lines by hand, and even handwrite comments. In principle, the whiteboard will work with any projector, since the interactive features are all handled by the whiteboard and its software. But only an ultrashort-throw projector will let you use the interactive features without casting annoying shadows.Another innovative use for an ultrashort throw is to project an image onto a tabletop. Picture a group of people sitting or standing around a table and discussing, say, a new product design, while looking at drawings laid out on the table. Now substitute a rear projection screen for the tabletop, with an ultrashort-throw projector mounted under the table and projecting the image up, onto the tabletop screen. Using projected images opens up possibilities, such as the potential to interactively rotate 3D images to get a better view, or show full motion video. 11. Tabletop Image: Front Projection For projectors with a short enough throw, you can get much the same tabletop image if you stand (or permanently mount) the projector vertically on the table, facing down, so it projects its image directly on the tabletop. Put a touch-screen whiteboard on the tabletop, and you can even interact with the image directly. 12. Down and Dirty (On the Floor) One last innovative possibility for ultrashort-throw projectors is projecting an image on the floor. Mount the projector in a safe place, next to or on a wall, for example, and point it down to project the image on the floor. This particular application is more appropriate for, say, a museum exhibit than for typical corporate use. (Although, a floorshow of company products on the reception room floor is a potentially eye-catching possibility). But it's worth keeping the idea in the back of your mind, should you ever notice an opportunity to use it.
10. Tabletop Image: Rear Projection