LCD projectors use liquid crystal display technology to project images onto a surface, with separate glass panels for red, green, and blue colors. Factors to consider when selecting a projector include resolution, brightness, portability, computer connectivity, and input options. LCD projectors are compared to DLP projectors, which use tiny mirrors but have less color saturation.
LCD projectors are systems that display or project information or video onto a surface. LCD stands for liquid crystal display, the technology used to project images. They are the technological descendants of overhead projectors and slide projectors, old systems that serve the same purpose. They are most commonly used for displaying images in presentations or conferences, but are also used in home theaters.
Video signals are made up of three colors: red, green, and blue. LCD projectors contain a separate glass panel for each. Each panel consists of two sheets of glass with a layer of liquid crystal between them. When a charge is applied, the crystals open to allow light through or close to block it. This opening and closing of pixels is what forms the image.
These devices use dichroic mirrors to split light from the input source into red, green, and blue components. Each then passes through its corresponding panel, where the pixels form an image. The three colors are then recombined in a prism before being projected through a lens. LCD projectors use separate panels for each color because it results in better color saturation than using a single panel for all three.
While all LCD projectors perform the same basic job, there are many different models available, and consumers should know what their projector will be used for before selecting one. These devices are priced based on several factors, especially resolution. Those with the highest resolution are just worth the money for those who need to project fine detail as accurately as possible. The right amount of brightness, measured in lumens, depends on the lighting conditions in which the projector will be used, as well as the size of the audience. A darkened home theater requires less light than a fully lit conference room.
Other factors in considering LCD projectors are portability, computer connectivity and input options. Those with higher resolution weigh more and are therefore less portable. Those who use multiple computers to give presentations should consider a projector that is easily compatible with different systems. Projectors used to show movies in a home theater should have component video inputs for the best picture quality.
LCD projectors are often compared to DLP (Digital Light Processing) projectors. These use circuit boards with thousands of tiny mirrors to project an image. Their main advantages over LCD projectors include smaller size because they don’t use multiple LCD panels, better color contrast, and no pixelation like what you sometimes see on LCD devices. However, LCD projectors are still known for having better color saturation. Generally, DLP is more popular for home theater use.
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