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How Are Rear Projection TV Screens Made?

Wednesday, May 13, 2009
Related Tags: crystal | televisions | lcd | liquid | rear
 

Instructions

Introduction

  • Step 1:
    Rear projection televisions have come a long way since they were first introduced on the market. Not only do they provide a better quality picture, but they are also made out of materials that allow them to cost less and last longer. There are three main types of rear projection televisions on the market today. These include digital light processing televisions (DLP), liquid crystal on silicon (LCOS) and liquid crystal display (LCD).

Liquid Crystal Display Screens

  • Step 1:
    LCD television technology allows for very impressive displays. Liquid crystal displays are the most common type of rear projection television on the market today. Each pixel contains three separate colors: red, blue and green. An electrical charge is used to determine which color or combination of colors is displayed to you. However, there is a lot more depth that goes into producing an LCD television. Every pixel that is in an LCD television is made up of electrodes in between two layers of polarized molecules. In order to work properly, each liquid crystal diode has to twist and bend into a crystal structure. With LCD televisions, electricity is used to stimulate the molecules in the LCD layer to show different colors. Depending on the amount of electricity that is pushed through the television, you can expect to see different colors on your television.

Digital Light Processing Screens

  • Step 1:
    Digital light processing televisions are another unique type of rear projection televisions. They work by passing light through different prisms and then refocusing the light for final projection. Many older digital light processing televisions used a color wheel; however, that has been phased out, and now all DLP televisions use a light processing chip. Digital light processing chips that use three chips are often used in movie projectors and can produce up to 35 trillion different colors. While digital light processing televisions are great, they can require some extensive upkeep. For example, the light bulb in many DLP televisions requires replacement, usually about every three years. These bulbs cost anywhere from $30 to $100.

Liquid Crystal on Silicon Screens

  • Step 1:
    Liquid crystal on silicon is somewhat similar to LCD television technology. However, it also shares similarities to digital light processing televisions. Liquid crystal on silicon uses a reflective technology but instead of mirrors uses individual pixels. There are different amounts of pixels and light sources used in each television, but liquid crystal on silicon is the newest and fastest growing rear projection television technology on the market today.

Conclusion

  • Step 1:
    Whether you purchase a LCD television, DLP television or LCOS television, nearly all of them are manufactured and assembled in foreign countries. However, as long as you purchase a brand name such as Sony or Samsung, you should have no problem finding a quality rear projection television. Each technology used to produce a rear projection television is very different. Make sure you know how each television is made and whether it fits your television viewing desires before purchasing.

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