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 DLP or LCD - Which is Best For You

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PostSubject: DLP or LCD - Which is Best For You   Wed Aug 03, 2011 3:22 am

The Basic Differences in Technology

Lcd and Dlp projectors work in different ways, LCD projectors - start first with a source of light, the lamp and split the light into three beams. Each beam passes through its own LCD panel. The LCD panels, some lcd projectors use only one lcd pannel (RGB) this lowers cost and in some cases quality. One panel has a red filter, one a green, and one a blue filter. The light is then recombined, using a dichroic prism. The combined, now in full color, passes through the lens and hits your screen. In most cases LCD Blacks come out lighter gray than DLP prrojectors.

DLP projectors (except 3 chip). Again, start with a lamp. Instead of passing light through an LCD panel, it is reflected off of a DLP chip (which has hundreds of thousands of tiny mirrors), which modulates the light. A color, spinning wheel (Also called the color wheel), combined with timing, allows the light to come out the correct colors, and pass through the lens then to the screen.

DLP projectors One chip vs. Three

The vast majority of DLP projectors use a single monochrome DLP chip (officially DMD for "Digital Micro Device), and the aforementioned spinning color filter wheel to generate colors.

The other type of DLP projectors, the three chip models. These are currently at the top of the food chain, in terms of performance, whether for business or home theater, but as they currently start with selling prices in excess of $10,000, are not widely used, except in high end home theater, screening rooms, and commercial applications demanding the best performance. Three chip DLP projectors function more like LCD projectors. The light source is split into 3 beams. ,Llight is still reflected off of the DLP chips instead of passing though as is done with LCD panels, however, like with LCD projectors the three beams are recombined into a single beam and pass through the lens. It should be noted that 3 chip DLP projectors often use the exact same DLP chips that are used singly in one chip models.

LCD Projectors: Strengths
Richer color dynamics for better results in rooms with ample ambient light
Draw less power
Throw less heat
No color filter wheel = No "rainbow effect"
Slightly quieter Seemingly sharper image on data

Quicktip: You need about 30% more lumens in a DLP projector to hold its own with an LCD model.

DLP Projectors: Strengths
Smoother video
Smaller box
Pixels far less visible, (although normally not an issue for business use)
More “filmlike” on DVD and HDTV
Generate "blacker" blacks
Higher contrast

LCD Projectors: Disadvantages
More visible pixels
Some screen door effect on certain video images
Physically larger - Even for the same number of lumens
Poorer contrast
Blacks come out lighter gray than DLP prrojectors

DLP Projectors: Disadvantages
Rainbow effect bothers some
More moving parts (color filter wheel)
Color filter wheel often produces soft but audible whine
Poorer reds and yellows at full power
Color saturation
Need more lumens than LCD, for rich colors, when dealing with ambient light
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