DLP


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DLP

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DLP

(1) (Data Loss Prevention) Systems that monitor data to prevent their dissemination into unauthorized hands. DLP may be implemented in stand-alone computers in the network that analyze the traffic, while software in user's machines and servers evaluate the use of data being read on the local drives.

(2) (Digital Light Processing) A data projection technology from TI that produces clear, readable images on screens in lit rooms. DLP is used in all types of projection devices, from data projectors that weigh only a few pounds to large rear-projection TVs to electronic cinema projectors for movie theaters.

All in the Mirrors
The technology uses a spatial light modulator called a "Digital Micromirror Device" (DMD). The DMD is a memory chip covered with hinged, microscopic electromechanical mirrors, one for each pixel on the screen. For example, a 1280x1024 resolution uses more than a million "micromirrors," which tilt 10 degrees forward or backward, acting as light switches. Each mirror is 16 micrometers square, and all of them fit on a CMOS chip the size of a postage stamp.

Tilt and Oscillate
The state of each memory bit (0 or 1) in the video frame causes the mirror to tilt in one direction to direct light through a lens to the screen, or tilt in the other direction to deflect it. Gray scale is created by causing the mirrors to oscillate some number of times within each 16 millisecond video frame.

On one-chip projectors, color is achieved by beaming red, green and blue light onto the chip sequentially. The light source can be a mercury vapor lamp shining through a spinning color wheel or from three LEDs. The oscillating mirrors create the shades of color. Offering longer life and greater contrast, LED-based DLPs began to ship in 2006. More costly three-chip units use three sets of mirrors, one each for red, green and blue, and the resulting three images are combined for projection. See MicroTiles, Wobulation, microdisplay and rear-projection TV.


DLP Processing
In this one-chip example, each screen frame from the computer is sent to the memory on the DLP chip to provide the data for moving the mirrors. The light source is a mercury vapor lamp beamed through a spinning color wheel or separate red, green and blue LEDs. Drawing less power and producing a higher contrast, the LEDs last 20 years under normal usage, compared to four for the very expensive mercury lamp.







A Single Pixel
Hard to believe, but more than a million of these light switches, only 16 micrometers square, are fabricated onto one CMOS chip. The state of the memory cell (0 or 1) tilts the mirror to reflect or cancel light. Gray scale is achieved by causing the mirrors to oscillate back and forth. (Redrawn from original diagram courtesy of Texas Instruments, Inc.)







DMD Vs. LCD
The gap between the mirrors in a DMD pixel (left) is smaller than the gap in an LCD display (right), resulting in a sharper display.
References in periodicals archive ?
5, 2011 /PRNewswire/ -- Texas Instruments (TI) (NYSE: TXN) DLP Products makes viewing quality, High Definition (HD) projection in 3D at home a reality with the announcement of multiple brands shipping 1080p 3D projectors.
The Starus NC2500S incorporates the Texas Instruments DLP Cinema technology features, including CineLink(TM), CineCanvas(TM), CinePallette(TM), CineBlack(TM), and projects concentrated black images allowing it to faithfully reproduce input sources, like digital cinema, that require high resolution and high contrast.
Exhibitors will likely install the DLP Cinema 4K solution to light up theatre screens as wide as 100 feet and 3D screens as wide as 75 feet, which has been a challenge for competing technologies.
DLP Cinema's next-generation electronics platform utilizes the same highly reliable DLP Cinema chipset and integrates high security requirements, quality control and specification architecture defined by DCI.
According to Amy Van Kirk, PricewaterhouseCoopers National Campus Recruiting Leader: "Diversity is a key initiative for our firm and DLP is right in-line with this initiative.
Development of the DLP chip began in TI's Central Research Laboratories in 1977 when Hornbeck first created "deformable mirrors" to manipulate light in an analog fashion.
But LCDs may not last as long as DLP projectors, which generally deliver better contrast--an important consideration for school settings.
Features TI's proprietary DLP TRP architecture and adaptive DLP IntelliBright[sup.
Texas Instruments will deliver the enhanced DLP Cinema 4K chip to its licensees, Barco, Christie Digital and NEC, which will extend the breadth of products to exhibitors to over 12 projector models.