Projection technologies – LCD, DLP and LCOS

LCD, DLP and LCOS are three projector technologies which are predominantly used in schools, colleges and corporate houses for giving presentations, watching videos, classroom teaching, product training etc. LCD projectors use LCD (Liquid Crystal Display) technology to display text and image on an interactive whiteboard or other projection screen. They are also known as multimedia projectors as they can display both text and images from PC, TV and video recorders. They can work with all types of desktops and laptops. The projection may be SVGA or XGA resolution.

Means SVGA resolution 800 * 600 means that XGA 1024 * 768 screen resolution. A digital image consists of dots or pixels. A decision is the size of the digital image width * height expressed. For example: 800 * 600 resolution means is an image 800 pixels wide and 600 pixels in height. The projector light is measured in ANSI (American National Standards Institute)Lumen.

The DLP and LCOS projectors are also considered a type of LCD projector, but using DLP (digital light processing), and LCOS (Liquid Crystal over Silicon-) technology for video projection. LCD technology is better for computer use and DLP is better for the video project. LCD screen offers better color saturation, the image is sharper and more efficient than the DLP light. DLP projectors are lighter and smaller and produce video LCD contrast higher.

LCOS technologyis best for a very high resolution. The headlamps are larger and heavier than LCD and DLP and generally cost more. A practical application of LCD technology is used by teachers when students training for software that picture says "MSWord display" from a computer screen, and the project on the interactive whiteboard so that all students can see what is happening on screen computer. Some projector accessories include: cabinets, boxes, ceiling mount kit, cables, lenses, lamps,remote control, screen, stand, rollers, digital microscope, viewer, etc.

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Projection Screens Articles Comments 0 Apr 22nd, 2010

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