Categories and Types of Projectors

By: Robert Thomson

Categories and Types of Projectors

CRT (Cathode Ray Tube) Projectors

CRT is the primary category of projectors that offers the finest quality of pictures up to present. This projector technology does not have definite pixel counts, which makes them very flexible and popular projector device for cinemas, big screen displays or even low-resolution images. It has three singular lenses that are situated on separate axis, which segregates the colors green, blue and red to create images on the screen.

CRT projector in itself is expensive plus additional installation costs and you may want to reconsider different equipment when working on a limited budget. CRT lenses require synchronized lens positioning when installed on floors and ceilings that involve a CRT projector set-up expert to execute. It is periodically maintained via calibration of trained CRT professionals.

LCP Projectors

LCP projectors are composed of liquid crystal panels and metal halide lamp. Metal halide lamp provides a pure white light that is processed through the liquid crystal panel’s reflectors and filters. The light is then divided into blue, green and red that illuminates the liquid crystal panels creating combination of lights to project final images. It is an easy to use projector technology that provides portability, zoom and focus features. The only drawback of these projectors is their vulnerability to chicken wire effect (showing criss-cross pixel composition), which creates a poor quality image output when zoomed. It also has limited pixel count, which prevents it from operating a low-resolution image display.

Types of Video Projectors

Standard LCD

Standard LCD (Liquid Crystal Display) projectors are composed of a single LCD panel. This single panel processes the three major colors that provide colored images. This type of projector has been exceeded by other types of LCD and is now rare in the market.

Polysilicon LCD

Polysilicon LCD uses the same projector technology as a standard LCD but of higher quality standards. It provides wider saturation range for colors compared to standard LCD projector.

DLP Projectors

DLP (Digital Light Processing) projector is one of the latest projector technologies introduced in the market and is popular amongst consumers. It is composed of an individual chip that have thousands micro mirrors to process the light from the lamp and direct it to the projector’s lens. This type of projector technology is also known as DMD or Digital Mirror Device). DLP projectors are also known to create brighter and clearer images compared to LCD projectors. It is also costs more to produce a DLP projector compared to CRTs and LCD projectors.

Projector care tips

Knowing proper care tips for your projector helps prolong your equipment’s life span and prevent unnecessary repair costs.

· Turn your projector off using the power button. This allows the cooling fan to run enough air through the device and properly ventilate it before absolute shutdown.
· Clean the your projector’s air filters regularly.
· Keep your projector’s lens clean. Wipe it with a clean cloth designed for cleaning lenses.
· Do not block the your projector’s source of air ventilating your projector.
· Keep your projector in a dry and cool place.

To get best results and more accurate care tips check your projector’s manual.

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Robert Sauce is a freelance writer who the author of articles such as Projector Lumens, Slide projectors, and Fresnel Lens Projector Visit Categories and Types of Projectors.

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