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 images on screens in lit rooms. DLP is used in projection devices that weigh only a few pounds to movie theater projectors. It was also used in earlier rear-projection TVs.

It's All in the Mirrors
DLP 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 light 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. 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.


One-Chip DLP Processing
The computer sends each video frame to the memory on the DLP chip, which provides the data for moving the mirrors. The light source is either a single mercury vapor lamp beamed through a spinning color wheel or separate red, green and blue LED lights. Drawing less power and producing a higher contrast, the LEDs last 20 years under normal usage, compared to four for the 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 ?
In this paper, we provide a new general, simple, and practical technique, named Distributed Leafs Pruning (DLP), which can be combined with every distance-vector algorithm for shortest paths with the aim of overcoming some of their main limitations in large scale networks (high number of messages sent, high space occupancy per node, low scalability, poor convergence).
The beauty of DLP is that it not only provides data leakage protection and it is only a side-effect.
About Texas Instruments DLP Products Since 1996, Texas Instruments' award-winning DLP technology has powered the world's top display devices to deliver higher resolution images rich with color, contrast, clarity and brightness for a wide range of applications, including intelligent display technology.
DLP solutions provide very little context about data usage, permissions, and ownership, making it difficult for IT to proceed with sustainable remediation.
With the recent advancements in metadata technology, data governance software is providing organizations with the ability to improve DLP implementations by not only automating the process of identifying sensitive data, but also simultaneously showing what data is in use and by who, providing the needed context for comprehensive DLP.
"At some point in the future, VMware envisions broadening its DLP push to do things such as preventing data from moving from a network into the cloud, for example, if policy prohibits it, or from one country to another if it violates regulations such as national privacy laws," Coza said.
The DLP appliance sits there in real time and watches all the data as it moves across the network as packets, and it inspects those packets to see what is inside and where they are going.
Many organizations use data loss prevention (DLP) systems to monitor and guard against unauthorized use and transmission of proprietary and/or confidential electronic information, as well as against communications violating their code of conduct policy (e.g., insider trading or sexual harassment).
Alexei Lesnykh, Business Development Manager, DeviceLock, offers another definition: "DLP is a software, appliance-based or hybrid solution that primarily seeks to prevent corporate data breaches resulting from insider negligence, accidental mistakes or deliberate misconduct, as well as malware infiltrations.
PacketSure Managed DLP was specifically designed for customers who use managed network security solutions, such as Alliance Technologies' managed services, and require data loss prevention.
Accordingly, the D795WT DLP projector bears comparatively higher gross profits among its existing product lines.