As a follow up to our post on The Benefits of LCD Projection, we will now explore the benefits of a competing display technology: DLP (Digital Light Processing). Currently DLP is one of the leading technologies used in digital cinema projection.
Older DLP-based projectors use metal-halide lamps combined with a color wheel. The mechanical color wheel is placed between the lamp and the DLP chip(s). The wheel is divided into multiple sections. Older models only use the three primary colors: red, green and blue, while newer projectors take advantage of the secondary colors as well: magenta, yellow, and cyan. This enables the projector to have a broader spectrum of color (This new color performance is called BrilliantColor). The chip is synched with the color wheel so that the current color of the wheel that is in front of the lamp is displayed on the DMD (digital micromirror device). The mirrors oscillate back and forth, either directing light to or away from the lens path to turn the pixel on or off. Each mirror relates to a single pixel. The wheel rotates at a high-rate (up to 10 times the frame rate) so observers can see the full color.
DLP models either offer single chip or three chip projectors. The difference is that in three chip applications, each primary color is sent to its own DLP chip, instead of all colors being sent to a single chip.
Newer DLP projectors are using high-power LEDs or even lasers for illumination, which eliminate the need for the rotating color wheel, which in-turn eliminates the "rainbow effect" (red, green, or blue 'shadows' that can sometimes be seen in high contrast or fast moving images).
DLP Projectors typically provide a larger size projection due to the fact that DLP projectors focus more on brightness and color saturation than LCD and in most cases, higher quality. Also DLP produces a great consistent picture. One of the biggest benefits of DLP is that is has a longer lifespan and its compact design.
Another benefit of DLP is that pixelation is not as visible as it is in LCD (this is known as the 'screendoor effect' in LCD projection). Also it has better black levels and contrast, which can be vital in video images.
These are some technical aspects to keep in mind when choosing the right DLP Projector Rental.
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