This seminar room contains a high-resolution digital document camera.
A document camera (doc cam) is essentially an overhead projector with a camera mounted on top.   It has lights on each side that allow objects to be illuminated and projected (in high resolution - 1280x1024 pixels) onto the screen using the room's projection system.  Controls on the front include freeze, zoom in and zoom out buttons.  In addition to displaying traditional transparencies, this device can display any three dimensional object (see examples below).


Figure 1.  "Selective" Doc Cam Buttons located on front.  Note: In order to simplify device operation, a cover plate has been installed exposing only buttons used for commonly needed device functions. 
Figure 1a.  Doc Cam Buttons
POWER  button (left) and the FREEZE button (right).  Pressing (repeatedly) the POWER button turns the device on and off (includes lamps).  Pressing the FREEZE button will result in the continuous static display of the current object until the button is pressed a second time.
Figure 1b.  Doc Cam Buttons
The two IRIS buttons control the brightness and darkness of the displayed image.  The two ZOOM buttons control the scale of the object that is displayed and the two FOCUS buttons control the sharpness of the displayed object.
Examples of document camera applications:
Figure 1.  Printed material (e.g. handouts, newspapers).   Figure 2.  Objects (e.g. car keys).
Figure 3.  "Live" Handwritten material (e.g. use a pen and a blank piece of paper during the presentation.) Figure 4. Textbooks (e.g. table or figure)
Equipment:
Samsung SVP-6000