Wednesday 3 November 2010

LCD Projectors

LCD Projector stands for liquid crystal display, as the name itself says it is used to display images, info onto a bigger/wider viewing surface for instance giving presentations, or as we all know, cinema's use them for projecting their movies onto the big screen.

They send light from a "Metal Halide lamp" into a prism that will separate the light source into 3 different poly silicon panels for the components of the video signal i.e. red, blue and green.

It then sends the polarized light through the panels thus allowing the individual pixels to be opened to allow the passage of light through them or to be closed to black the light from passing. This technique allows for the production of many different colours and shades to be in the projected image that appears on the bigger screen.

Dedicated projector screens usually help the image be projected clearly (blank white, grey and/or black) usually enable to block ambient light.

Movie Projector - used in most cinema's found in today's world, it is used to project moving pictures onto a projection screen.

As with big things comes the small ones in a smaller package... hence the Handheld Projector. A mini device that just acts like it's bigger counterpart though can be displayed anywhere with movies and pictures on the move.



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