MODULE 4 PROJECTION SYSTEMS

1. MODULE 4 PROJECTION SYSTEMS

2. Introduction • Any bright gets attention. This is the reason why projectors have long been popular as a medium of instruction. • The lighted screen is a silent shout- a shout likely to be heard and heeded even by the most reluctant learners”

3. Filmstrip Projector •  was a common form of still image instructional multimedia, once commonly used by educators in primary and secondary schools (K12), now overtaken by newer and increasingly lower-cost full-motion videocassettes and DVDs

4. A device used to view a filmstrip. The term filmstrip refers to a roll of 35mm transparent film containing a series of related still pictures shown one at a time.

5. Advantages: • It provides visual stimulation and motivation to the learner • East to store • Pace of viewing can be controlled by the user • It lends themselves well to independent self study. Limitations: • The permanent sequence of the images makes it impossible to alter its sequence without destroying the filmstrip. • Sprocket holes get damaged or torn if filmstrip is constantly used or not threaded properly.

6. Slide Projector • Is a device to view photographic slides. The term slides refers to a small format photographic transparency individually mounted for one-at-a-time projection • Slides are made by taking pictures with a slide film, processed, and then mounted in a 2 by 2 inch mounts.

7. Advantages: • Audio may accompany the slide show. • Slides can be integrated into individualize instruction program. • Compare to filmstrips, slides are more flexible because they can be arrange and rearrange into different sequences. Limitations: • Slides can become easily disorganized. • Jamming of slides in the slide-changing mechanism. • Dust or finger prints may accumulate on the slides if not handle and store properly. • Not effective in a fully-lighted room.

8. Slide Projector

9. Overhead Projector • Is a box with a large stage on the top surface. A lamp from inside the box is condensed by a special lens and passes through the transparency that is placed on the stage.

10. Overhead Projector Ways in Creating Overhead Transparencies: • Direct Drawing Method a method where in content is drawn or written directly on the transparency using a marking pen. • Thermal Film Process a master is prepared on an ordinary paper using heat-absorbing material such as India ink, ordinary lead pencil. Or any substance containing carbon.

11. Electrostatic Film Process (Xerography) transparencies are prepared using plain paper copying machines. A master is prepared on plain paper and then photocopied. • Computer-Generated transparencies are prepared with the use of computers and then printed on an inkjet or laser printer.

12. Opaque Projector • Is a device which displays opaque materials by shining a bright lamp onto the object from above.

13. LCD (liquid crystal display) Projector •  is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern analog of the slide projector or overhead projector. To display images, LCD (liquid crystal display) projectors typically send light from a Metal halide lamp through a prism that separates light to three poly silicon panels – one each for the red, green, and blue components of the video signal.

14. LCD (liquid crystal display) Projector

15. References: • http://en.wikipedia.org/wiki/Filmstrip • http://www.irememberjfk.com/mt/2007/03/filmstrips_in_school.php&imgurl • http://joelnicholsblog.wordpress.com • http://musicring.info/index.php?tp=81350e0ebb536599 • http://www.google.com.ph/search?hl=en&q=Overhead+Projector&um • http://www.tpub.com/content/draftsman/14064/css/14064_231.htm&imgurl • http://read-technology-news.blogspot.com/2010/09/lcd-projector.html&imgurl

16. Thank you…….