Digital light processing (DLP) is a technology that was first developed by Texas Instruments. There are 1-chip and 3-chip DLP projectors. One chip DLP projectors tend to have better black levels and have lower zoom range lens.They  are also likely to induce 'rainbow effect' for some viewers, have better static contrast ratios and better image quality. Three chip configurations eliminate the rainbows because there is no color wheel and are generally more costly, even if it's a used DLP projector. 
  

Buying a used DLP projector requires a little research. You have to decide if you are using it for business or as a movie projector or both. DLP projectors is able to reproduce color accurately, has a high level of brightness and contrast. All made possible with chips called digital mirror devices. Each pixel on such a chip is like a mirror. Each mirror represents one or more pixel in the projected image. The  mirrors expands and intensify the light as it is produced from the chip. With DLP technology brighter images with wide viewing angles are made possible and images can be projected on any screen size.

 

For your home theatre, you can use the latest Blu-ray DVD player with your used DLP projector.  There are many users who are concerned if their Blu-ray player would be compatible. As long as you have an HDCP compliant  DVI or HDMI input on your projector, there should be no compatibility issues. Most gamers also like DLP projectors as the refresh rates are higher and can handle fast video without skittish images.

 

For a perfect video image, there should be other factors to look out for other than the DLP projector. The room itself requires careful set up to ensure the best lighting and sound. The total set up can be very costly, and a used DLP projector may help reduce your total expenditure.