DLP Projector : What is it?
| A DLP projector is a digital projector that uses chips with micro-mirror devices with fixed resolutions. These chips reflect light pixel-by-pixel. They contains thousands or even millions of microscopic mirrors affixed to the surface using hinges or posts. Each mirror is only a micron apart from the next. It can tilt + or – 10 to 20 degrees or more at a speed of 5,000 to 7,000 times per second. The movement is so fast the eye cannot detect it. This process allows the displaying of solid and smooth images without perceptible interruptions. |
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Kinds of DLP Projectors include the following: |
Single-chip DLP projector
- This type of DLP projector is based on a single DLP chip.
- It projects images through color wheels that filter light into red, green, and blue.
- It creates images by tilting the mirrors or pixels toward or away from the light source thousands of times per second.
- When a mirror is switched on, the reflected pixel appears white. When the mirror is switched off, on the other hand, the reflected pixel appears black.
- When the mirror is switched on more frequently than it is turned off, it reflects a lighter gray pixel.
- When the mirror is switched off more frequently than it is turned on, it reflects a darker gray pixel.
- A single DLP chip can create at least 16.7 million colors.
Three-chip DLP projector
- A three-chip DLP projector projects images through a prism.
- The light passing through the prism is divided it into red, green, and blue.
- The colored light is combined and passed through the projection lens to form an image.
- It is capable of producing at least 35 trillion colors and a higher grayscale, forming more filmic images.
- Each DLP chip is dedicated to one color.
- A three-chip projector is commonly used in DLP cinema projection systems.
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Type: If you want a DLP projector for home use, choose a single-chip projector as it is cheaper and more appropriate to use than a three-chip DLP projector.
Resolution: Choose a DLP projector with a high resolution for more detailed images.
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