DLP projectors produce the image by using thousands of microscopic mirrors laid out on a semiconductor chip called a Digital Micromirror Device (DMD)
. Each mirror represents one or more pixels of the projected image. These mirrors can be repositioned rapidly to reflect light through the lens. Rapidly shifting the mirrors produces grayscales, controlled by the ratio of on time to off time.
Colours are produced in a DLP projector in two ways;
In a Single-chip DLP projector colours are produced by placing a spinning color wheel between the lamp and the DMD wheel is usually divided into four sectors, the primary colours; red, green, and blue, and also an additional clear section to boost brightness.
In a 3-chip DLP projector a prism is used to split the light from the lamp, and each primary colour of light is then routed to its own DMD chip, then combined before coming out through the lens. 3-chip DLP projectors have finer graduations of shades and colours than single-chip projectors, up to 35 trillion! This is because each colour has a longer time available to be modulated within each video frame; furthermore, there won’t be any flicker or rainbow effect like with the single chip solution.
Currently, All of our Sanyo and Canon projectors are LCD.
Our Panasonic projectors are all DLP with the exception of the LCD based PT-AE3000E.
Christie and Barco projectors all use the latest in 3-Chip DLP technology.
Digital Light Processing (DLP) was originally developed by Texas Instruments, in 1987.