DLP is the latest high-precision projection technology used in business and home displays. DLP technology provides unsurpassed brightness and image clarity.
DLP is based on an optical semiconductor, a digital micromirror device, or DMD, which was invented in 1987 by Larry Hornbeck of Texas Instruments.
A DMD crystal is a high-precision matrix that digitally converts light, in other words, a high-speed microcircuit, the surface of which consists of many microscopic mirrors that reflect light. With the help of millions of microscopic mirrors, a beam is formed. Each such mirror corresponds to one pixel of light in the projected image. Combined with a digital signal, a light source and a projection lens, these mirrors provide the highest quality video and graphics reproduction. When a digital video or graphic signal enters the DLP system, a microscopic electrode located under each DMD mirror is activated, causing the mirror to tilt either towards the light source or in the opposite direction. When the mirror is tilted towards the light source, it reflects one pixel of light through the projection lens onto the screen. When tilted in the opposite direction, the light does not hit the mirror and the corresponding pixel space remains dark. Each DMD mirror is capable of tilting thousands of times per second.
By varying the length of time the light hits the mirror, different shades of gray can be displayed. If the mirror is tilted towards the light longer than in the opposite direction, it displays a light gray pixel, and when the tilt time away from the source is longer, it displays a dark gray pixel.
Thus, DMD mirrors can display up to 1024 shades of gray, producing ultra-accurate black and white images. The last stage of digital light processing is the conversion of the resulting monochrome image into color. In most DLP systems, color is added using a light filter called a "color wheel" that is placed between the light source and the DMD mirror panel.
As the color wheel rotates, red, green, and blue light falls sequentially on the DMD micromirrors. By coordinating the angle of each mirror with these flashes of light, a standard DLP system can reproduce over 16 million different colors.
For example, a purple pixel is created by tilting a mirror towards a light source when a red or blue beam hits it. The human eye combines these primary colors and sees purple. Samsung DLP TVs, home theaters and projectors use a single DMD chip, lamp, color wheel and projection lens system. These systems offer greater contrast, clarity, and color saturation for video and graphics than any other imaging technology.
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April 19, 2024 19:32:31 +0300 GMT
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