A Brief Overview Of Rear Projection Television Technology

Projection Television

Rear projection systems are similar to traditional televisions. The term rear-projection means that the image is projected and reflected onto the screen area from behind the screen as compared to traditional video and film projection where the projector itself is placed in front of the screen, such as in a movie theater.

Elements of rear projection television

A rear projection TV basically consists of five elements namely projector technology used to produce a video image, the type of lens combination used to magnify the projected image, a mirror to reflect the projected image, the screen on which the reflected image being produced, and the box to be used to put all the other four elements.

Rear projection technologies

DLP - DLP stands for Digital Light Processing. It uses a small, rectangular device made up of microscopic mirrors called Digital Micromirror Device (DMD) to create high quality images. The mirrors point toward or away from a projection lens, depending on whether the corresponding pixel needs to be light or dark. Most DLP rear-projection sets have one DMD and a spinning, multicolored wheel that adds color.

Advantages of projection television are a big screen size starts from 42 inches and go up from there, excellent picture quality and not susceptible to burn-in. The disadvantage of projection television is lamp replacement can be expensive.

If you have ever looked at a rear projection television’s specifications, you may have noticed among its features the lamp’s lifespan. Manufacturers use the latest technologies to provide you with longer lamp lifespan, but this still means that projection television lamps do not have an infinite life. Newer projection television lamps use halogen instead of incandescent lamps, halogen lamps that work at much higher temperatures, leading to a shorter lifespan. When it comes to replacing the projection television lamp, it all depends on how you perform the operations. Always buy the same type of lamp as the TV’s manufacturer specifies, as buying lamps that operate at different voltages or power emissions can also damage your brand new television. Your projection television lamp’s lifespan can depend on many variables and specialists say that most of the defects affecting these lamps are due to human error, so taking care of your TV can offer you a significant increase in lifespan.

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