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Evolution of the Projector
Transcript of Evolution of the Projector
Users must be careful when projecting heat sensitive objects as they might be damaged by heat from the projector's hot light source. Interesting Fact:
Interesting Fact: Opaque projectors are still in use today, for example in the creation of artwork. Visit the clip below for more information. The Episcope, one of the earliest opaque projectors was sold by a German toy manufacturer in 1900 and used to project postcards, pages of books, photos or 3D objects like insects, leaves and coins onto the wall.  How Does an Opaque Projector Work?
A Strong light, illuminates an object from two sides. A part of the reflected light passes the projecting lens which projects an image on to the screen.  Simple episcope, Gebrüder Bing, Nuremberg c. 1900. 1950's: Slide Projector Slide Projectors were introduced in the 1950’s. This technology works by transferring presentation material onto 35mm slides, therefore projecting anything that can be put onto film. The leading supplier of slide projects, Kodak only discontinued production in October 2004.  Advantage:
Used to share many photographs Disadvantages:
Slides are easily lost or damaged
Producing slides is expensive and time consuming Kodak Carousel Slide Projector 35mm Slide 1950-1980: Overhead Projector Overhead projectors evolved from slide technology in the 1950’s. They are similar to slide projectors in that for information to be viewed needs to be transferred onto another material ie. transparencies.  By the 1980’s overhead became commonplace in school classrooms, universities and businesses. In the mid 1990’s a decline in sales and use of overhead projectors began with the advancement of monitors and displays such as the document camera. The overhead projector continues to be widely used today. Advantages:
User can annotate on slides while presenting
Transparencies are immediately available by using a copy machine to copy a document, unlike slides, cutting down on time and cost The Overhead projector in Today's World:
Some people continue to use them as they feel they are more reliable than computers as well as being a less expensive alternative to more modern projector technology. Overhead Projector being used in a classroom 1988: Document Camera The document camera came into use in 1988. Document cameras are used to display 3D objects, pages from books, artwork etc. Documents cameras are used in educational institutions, companies to provide training, courts to present evidence, science and medical research, business presentations etc. and are still widely used today.  Advantages:
Does not require a computer connection or networking
Has long lasting florescent bulb
Has the capacity for projecting live demonstrations and showing close-up angles Disadvantages:
High cost, in January 2010 the cost of a full-featured, high-resolution model with computer interface was approximately $4000.00 compared to new transparency projectors costing about $200.00  Document camera projecting a 3D rose. Document camera being used in a classroom. Early 1990's: Computer & Video Projector The computer Projector is a digital data projector that came onto the market place in the early 1990’s. They were mainly used as a computer display projector for education, business and training.  Computer Projector Evolution:
In the beginning of their existence computer projectors were big, heavy, and expensive with poor image quality compared to today. With the advancement of computer projector technology they became cheaper, lighter and more popular. They continue to be popularly used in conferences, classrooms, training, gaming, museums, retail advertising etc. Advantages:
Smaller than other projectors therefore easier to transport
High quality image projection 1990's: Multimedia Projector The Computer Projector Video Projector Evolution:
Video projectors like computer projectors came into existence in the early 1990’s. They too came onto the market place heavy, big, expensive and with poor image quality. As quality improved and price reduced they have become increasingly popular. Video projectors can act as TV projectors which project satellite programming or local broadcasts and can also be attached to a DVD player. Today people can watch a high definition movie with quality equal or better than their local movie theater. Multimedia projectors also surfaced in the 1900’s and combined video, data and audio. It is important to note that many of today’s video projectors are also multimedia as they also support data and video. High quality sound systems require both power and separation, for this reason projectors are not best used as a primary sound source. This projection technology continues to be used today.  Advantages:
Universal: sound, video and data
High image quality as well as light weight easily transportable systems
Some multimedia projectors can support wireless presentations and wireless high definition. Evolution of Multimedia Projector: Proxima's original multimedia portable projector, the DP2800, which surfaced in 1994.
Weight: 19 lbs.
Cost: approximately $5000. Today's Samsung P400 pocket projector.
Weight 2 lbs.
Much Higher resolution
Cost: $699 2001: Projectors and Interactive Whiteboards The first fully mobile interactive whiteboard was released by eInstruction in 2001. The wireless technology allowed instructors to use it anywhere in the classroom. This technology was further enhanced in 2009 when eInstruction release a system of remotes and mini-boards. These gave students the ability to interact with the board from their desks. This projection technology is being integrated into classroom learning as a 21st century learning tool.  Advantages:
Wireless, interactive technology
Allows multiple users to interact with the technology at the same time Disadvantage:
High cost approximately $ 2000-3000 TedTalk - Learn How Johnny Lee is making this technology more accessible to everyone: Watch this clip to explore some of the many feature of Interactive Whiteboards: Johnny Lee: Wii Remote hacks 2005: Pocket Projectors Pocket projectors came onto the market in 2005, when they were introduced by Mitsubishi. They are extremely small in size and can fit in your hand. These projectors are mostly powered by batteries or can be plugged into the wall. Their light source is a cluster of LED lights. This technology is expected to be incorporated into everything from toys to portable computers.  Advantage:
light weight, highly portable. Aiptek Pocket Projector 2001-Present: Helio Display Helio Display, projection technology of the future? Take a look at this clip: VS. VS. VS. DLP® Interactive ProjectorTechnology...Coming to a Classroom Near You Created By:
Al-Massalkhi Rola, Berces Jessica, Chaif Philip, Duncan Adam & Oliel Tania Group Essay 750 Goes Here :) References: Evolution of Projector References
 Barton, M. (n.d.). The History of Interactive Whiteboards. Retrieved February 7, 2012 from
 Daniels, R. (n.d.). The History of the Opaque Projector. Retrieved February 6, 2013, from
 Document Camera Experts. (2008). What is a Document Camera Used For?. Retrieved February
4, 2013, from http://www.documentcameraexperts.com/Canada/learn_about_document_cameras.aspx
 Dourley, E., & Jefferys, L. (2007). The Evolution of Projector Technology. Retrieved February
6, 2013 from http://www.projectorcentral.com/projectors-evolution.htm
 Luikerwaal. (2012). Episcopes and epidiascopes: Part 1. Retrieved February 4, 2013, from
 Projector Reviews. (n.d.). Multimedia Projectors. Retrieved February 5, 2013 from