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Digital projectors are those video projectors which are used in conferences for presentations. The digital projectors receive video signals from, usually, desktop computers and display images on large screens which can be easily comprehended by all in the gathering.

Two Types of Digital Projectors
To begin with, there are two technologies used by digital projectors, the older one being the LCD, liquid crystal display with independent transparent panels of LCD for each constituent primary color (red, blue and green.) The image transmission depends on the signal received by the projector from PC which redirects the light signals through these LCD panels and lens onto a screen. The LCD projectors look pretty similar to older slide projectors and are simple in construction and thus cost less in comparison to their successors DLP projectors. The LCD can be thought of as slides placed at the focal length of the lens making it complete. Clarity of picture in LCD projectors depends on the number of pixels it is set for. (Pixels are smallest area of data or picture holders)

DLP Projectors: The Latest of the Digital Projectors
Digital Light Processing or DLP is a technology developed by Texas Instruments in 1987. DLP projectors bring in a paradigm difference in technology in image projection to board rooms. Unlike their predecessors, DLP projectors make use of tiny mirrors or micro mirrors to reflect light images to pass through the projector lens and onto a screen. Each mirror can be thought of as representing a pixel. The mirrors reflect primary colors in rapidly rotating succession as actuated by a rotating color filter wheel. The image of rapidly changing colors ‘constructs’ images for human eye perception. The micro mirrors are collectively called as DMD or ‘digital micromirror device’.

For the sake of enhancing picture clarity, the rotating wheel is provided with a plain patch which allows plain white light. This type of DMD projectors are also known as single chip projectors. The three chip projectors are a bit complicated but offer better clarity. Here a prism splits the light from lamp into primary colors which are redirected to DMD which recombines them before projecting through the lens.

Where Is the Difference
DLP projectors are lighter and give far better pictures. Single chip resolves 16.7 colors while the three chip model does a, hold your breath, 35 trillion colors.

Commercial Models
Texas Instruments is the pioneer who owns the patent for DLP technology. Fraunhofer Institute of Dresden of Germany developed the same technology simultaneously and markets it as Spatial Light Modulators. HP, Samsung are other market leaders in both LCD and DLP technologies.

I installed a picture editing program and accidently made it associated with all images. How can I make it so that all image files are associated with the Windows Picture and Fax Viewer program? (The picture viewer that comes with your copy of Windows automatically)

When I open up picture files on my computer, automatically, they open up through adobe photoshop. How can I make them open up through Windows Picture and Fax Viewer? how can I make it my default picture viewer? and where can I find this program on my computer? (because when I searched it, it didnt come up)
Thanks!

somehow my computer switched to using microsoft office picture manager as the default program, but I don’t want it to. How do I switch back to windows fax and picture viewer as the default program?

My pictures used to always open with ‘windows picture and fax viewer’ anytime i double clicked on them. Since i downloaded Microsoft office picture manager, the pictures always open with this program now. I know that i can just right click on the picture, go to ‘open with’ and choose the program i want to open it with.. but is there any way that the pics can just open with ‘windows picture and fax viewer’ whenever i double click on it?

I made some kind of update to my quicktime program on my PC, but it changed my default picture viewer and I can’t stand it. I used to have Windows Picture and Fax Viewer as my default picture viewer on my computer, but I don’t know how to change this option. Please help! Thanks.

There has to be a better way than deleting each individual fax…They add up very quickly and they are confidential.

I have a fax machine, but not a flatbed photocopier.

The program I have now takes so slow to open and isn’t really user friendly. I want picture and fax viewer back for my default program but can’t figure out how to do this. HELP please!

I have created a beautiful drawing of an azure dragon and a pheonix, and i want to paint it onto my wall. I do not have a projector and I do not have a place to rent one. My wall is 14 ft long and 10 ft tall. I am very good at free handing but it is a very complicated drawing and I would rather not have to free hand it again. Any suggestions as to how I could put this image on the wall without a projector?