| Digital projectors are those video projectors | | | | projectors bring in a paradigm difference in |
| which are used in conferences for presentations. | | | | technology in image projection to board rooms. |
| The digital projectors receive video signals from, | | | | Unlike their predecessors, DLP projectors make |
| usually, desktop computers and display images on | | | | use of tiny mirrors or micro mirrors to reflect |
| large screens which can be easily comprehended | | | | light images to pass through the projector lens |
| by all in the gathering. | | | | and onto a screen. Each mirror can be thought of |
| Two Types of Digital Projectors | | | | as representing a pixel. The mirrors reflect |
| To begin with, there are two technologies used | | | | primary colors in rapidly rotating succession as |
| by digital projectors, the older one being the LCD, | | | | actuated by a rotating color filter wheel. The |
| liquid crystal display with independent transparent | | | | image of rapidly changing colors 'constructs' |
| panels of LCD for each constituent primary color | | | | images for human eye perception. The micro |
| (red, blue and green.) The image transmission | | | | mirrors are collectively called as DMD or 'digital |
| depends on the signal received by the projector | | | | micromirror device'. |
| from PC which redirects the light signals through | | | | For the sake of enhancing picture clarity, the |
| these LCD panels and lens onto a screen. The | | | | rotating wheel is provided with a plain patch which |
| LCD projectors look pretty similar to older slide | | | | allows plain white light. This type of DMD |
| projectors and are simple in construction and thus | | | | projectors are also known as single chip |
| cost less in comparison to their successors DLP | | | | projectors. The three chip projectors are a bit |
| projectors. The LCD can be thought of as slides | | | | complicated but offer better clarity. Here a prism |
| placed at the focal length of the lens making it | | | | splits the light from lamp into primary colors which |
| complete. Clarity of picture in LCD projectors | | | | are redirected to DMD which recombines them |
| depends on the number of pixels it is set for. | | | | before projecting through the lens. |
| (Pixels are smallest area of data or picture | | | | Where Is the Difference |
| holders) | | | | DLP projectors are lighter and give far better |
| DLP Projectors: The Latest of the Digital | | | | pictures. Single chip resolves 16.7 colors while the |
| Projectors | | | | three chip model does a, hold your breath, 35 |
| Digital Light Processing or DLP is a technology | | | | trillion colors. |
| developed by Texas Instruments in 1987. DLP | | | | |