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How LCD Projectors Work

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Bulb

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Dichroic Mirrors

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Mirrors

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LCD

Arrays

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Dichroic

Prism

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Lens

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Screen

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LCD Array

The LCD array is made up of millions of individual pixels that can be polarised to let a certain amount of light through.

Each pixel is given the value of the pixel for that channel, adjusting the amount of light that is allowed to pass through.

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RED GREEN BLUE

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Review - LCD Projection process

  1. A single bright light source is split into separate colors (wavelengths) using dichroic mirrors
  2. The separate colors pass through an array of individually polarised LCD pixels
  3. The separate colors are combined into a single light source using a dichroic prism
  4. The light passes through a magnifying lens and is projected onto a separate screen, usually about 3-5 metres from the projector.