Overhead projectors are devices used to project images onto a screen. The size of the display is dependent on angle of projection and the distance between projector and screen. Overhead projectors are typically used in classrooms and conference rooms.
In order for a large classroom to see items clearly, the overhead projector needs to be at the perfect distance and angle. Panoramic views are very difficult to achieve and the inability to read slides can be distracting to observers.
Cost to Replace Bulbs
Overhead projector bulbs are expensive to replace. Average cost for a projector bulb at OfficeDepot.com is $300. To purchase from ProjectorZone.com, bulbs ranged from $150 to $400.
Overhead projectors are large and bulky and usually require a cart to transport from venue to venue.
Using an overhead projector, slides require constant writing and erasing, and book pages can be difficult to discern.
Overhead projectors are an outdated technology; it is much easier to create PowerPoint presentations and display them on a computer in full color using a regular projector.
The Disadvantages of a Whiteboard Projection Screen
Whiteboard projection screens are used frequently in schools, offices, and even in homes. Many people, however, don't take time to learn the...
History of the Overhead Projector
The first type of overhead projector was the episcope, replaced in the 1940s by the earliest modern devices. Only after educators adopted...
The Advantages of Using a Projector in the Classroom
Many teachers find chalkboards to be almost a thing of the past with the advent of projectors in the classroom. Rather than...
The Advantages & Disadvantages of Digital Projectors
Film exhibition technology has matured and evolved since Edison Laboratories invented the technology a century ago. The basic concepts are still similar....
The Disadvantages of the Overhead Projector
Since the 1980s, overhead projectors have enjoyed widespread use in classrooms, businesses and churches, but they come with limitations. Although many are...
Three Types of Projectors
Digital multimedia projectors can be used in a variety of situations, including office presentations, social gatherings, and home use. Today's projectors feature...
Advantages & Disadvantages of Irrigation Systems
Choosing the right kind of irrigation system for your lawn and garden affects the health of your plants and your pocketbook. Watering...