上传用户：dweejlaniy文档下载 ：『』&&『』『』所属分类：分类号：TN946.1文献出处：关 键 词 ：&&&&&&&&&&权力声明：若本站收录的文献无意侵犯了您的著作版权，请点击。摘要：投影机长期以来一直只是一些专业和团体用户的选择。随着投影技术的发展和市场进步,价格的日趋走低,现在投影机已经开始进入家庭了。许多厂家都推出了万元以下的家用投影仪,可以方便地让用户搭建有己的家庭影院。而投影技术也从早期的CRT显示技术过渡到了现有的LCD、DLP主流投影显示技术。LCD投影技术是为大家所熟悉的,LCD投影机的市场占有率,目前仍居高不下。但与之争雄的DLP投影技术颇有后来居上的趋势。DLP投影技术是由德州仪器公司研发的一套全数字化显示解决方案。DLP技术的核心是DMD数字微镜器件。DMD器件由上百万个精微镜面纽成,每一个镜面都能前后翻动(开启或关闭),每秒可达五千余次。输入的影像或图形信号被转换成数字代码,这些代码再被用来推动DMD镜面。当DMD座板、投影灯、色轮和投影镜头协同工作时,这些翻动的镜面就能够一同将图像投射到演示墙面、电影屏幕或电视机屏幕上。Abstract：The projector has long been a choice for a number of professional and community users. With the development of projection technology and market advances, prices are falling, and now the projector has begun to enter the family. Many manufacturers have introduced the use of a million yuan of home projector, you can easily allow users to build a home theater. The projection technology is also from the early CRT display technology to the existing LCD, DLP mainstream projection display technology. LCD projection technology is familiar, LCD projector market share, the current is still high. But the DLP projection technology and the hegemony of the trend of a catch up from behind. DLP projection technology is a set of all digital display solutions developed by TI. The core of DLP technology is DMD digital micro mirror device. The DMD device consists of millions of micro mirror compose, each mirror can flip around (open or closed), up to 5000 times per second. The input image or graphic signal is converted into digital code, which is then used to drive the DMD mirror. When the DMD base plate, projection lamp, color projection lens and collaborative work, the turning mirror will be able to demonstrate the image projected onto the walls, movie screen or TV screen.正文快照：投影机长期以来一直只是一些专业和团体用户的选择。随着投影技术的发展和市场进步,价格的日趋走低,现在投影机已经开始进入家庭了。许多厂家都推出了万元以下的家用投影仪,可以方便地让用户搭建自己的家庭影院。而投影技术也从早期的CR下显示技术过渡到了现有的LCO、OLp主流分享到：相关文献|In English
日本語表示
& 显示和投影
Compact and powerful chipsets
DLP470TE (Coming soon)
DLP470TP (Coming soon)
Fulfilling product needs across applications
Pushing the boundaries of 4K UHD displays
Pushing the boundaries of 4K UHD displays
Product developers can now design DLP(R) 4K UHD technology into a variety of applications such as laser TVs, mobile smart TVs, digital signage displays, smart home displays, pico projectors, business and education projectors, and more. The chipsets span a wide range of power, size, brightness and performance levels to help designers achieve any 4K UHD end-equipment objective with 8.3 million pixels on the screen.
DLP470TP - Optimized for size and power, up to 1,500 lumens
DLP470TE - Optimized for projects needing over 1,500 lumens
- Designed to enable projection applications up to 5,000 lumens
Optical module manufacturers
Ready to get started with DLP 4K UHD chipsets?
The DLP products ecosystem includes established resources to help the user accelerate the design cycle. Optical module manufacturers already incorporating the latest
DLP 4K UHD chipsets include:
For more information, visit the
optical module page.EnglishDeutschEspa?olFran?aisHrvatskiItalianoPolskiTürk?eРусский中文日本語???
Email Address
Remember Me
Social Share
Digital Light Processing
(1848 views - 3D Printing Dictionary)
Digital Light Processing (DLP) is a display device based on optical micro-electro-mechanical technology that uses a digital micromirror device. It was originally developed in 1987 by Larry Hornbeck of Texas Instruments. While the DLP imaging device was invented by Texas Instruments, the first DLP-based projector was introduced by Digital Projection Ltd in 1997. Digital Projection and Texas Instruments were both awarded Emmy Awards in 1998 for the DLP projector technology. DLP is used in a variety of display applications from traditional static displays to interactive displays and also non-traditional embedded applications including medical, security, and industrial uses.
DLP technology is used in DLP front projectors (standalone projection units for classrooms and business primarily), DLP rear projection television sets, and digital signs. It is also used in about 85% of digital cinema projection, and in additive manufacturing as a light source in some printers to cure resins into solid 3D objects.
Smaller "pico" chipsets are used in mobile devices including cell phone accessories and projection display functions embedded directly into phones.
Digital Light Processing
Licensed under
Digital Light Processing (DLP)
based on optical
technology that uses a . It was originally developed in 1987 by
of . While the DLP imaging device was invented by Texas Instruments, the first DLP-based projector was introduced by Digital Projection Ltd in 1997.
Digital Projection and Texas Instruments were both awarded Emmy Awards in 1998 for the DLP projector technology.
DLP is used in a variety of display applications from traditional static displays to interactive displays and also non-traditional embedded applications including medical, security, and industrial uses.
DLP technology is used in DLP front projectors (standalone projection units for classrooms and business primarily), DLP rear projection , and digital signs. It is also used in about 85% of
projection, and in
as a light source in some printers to cure resins into solid 3D objects.
Smaller "pico" chipsets are used in mobile devices including cell phone accessories and projection display functions embedded directly into phones.
In DLP projectors, the image is created by microscopically small mirrors laid out in a matrix on a semiconductor chip, known as a
(DMD). These mirrors are so small that DMD
may be 5.4&&m or less. Each mirror represents one or more
in the projected image. The number of mirrors corresponds to the resolution of the projected image (often half as many mirrors as the advertised resolution due to ). , , , and
() matrices are some common DMD sizes. These mirrors can be repositioned rapidly to reflect light either through the lens or onto a
(called a light dump in
terminology).
Rapidly toggling the mirror between these two orientations (essentially on and off) produces , controlled by the ratio of on-time to off-time.
There are two primary methods by which DLP projection systems create a color image: those used by single-chip DLP projectors, and those used by three-chip projectors.
A third method, sequential illumination by three colored light emitting diodes, is being developed, and is currently used in televisions manufactured by .
Interior view of a single-chip DLP projector, showing the light path. Light from the lamp enters a reverse-fisheye, passes through the spinning color wheel, crosses underneath the main lens, reflects off a front-surfaced mirror, and is spread onto the DMD (red arrows). From there, light either enters the lens (yellow) or is reflected off the top cover down into a light-sink (blue arrows) to absorb unneeded light. Top row shows overall components, closeups of 4-segment RGBW color wheel, and light-sink diffuser/reflection plate on top cover.
In a projector with a single DLP chip, colors are produced either by placing a
between a white
and the DLP chip or by using individual light sources to produce the primary colors,
for example. The color wheel is divided into multiple sectors: the primary : red, green, and blue, and in many cases white (clear). Newer systems substitute the primary
cyan, magenta, and yellow for white. The use of the subtractive colors is part of the newer color performance system called BrilliantColor which processes the additive colors along with the subtractive colors to create a broader spectrum of possible color combinations on the screen.
The DLP chip is synchronized with the rotating motion of the color wheel so that the green component is displayed on the DMD when the green section of the color wheel is in front of the lamp. The same is true for the red, blue and other sections. The colors are thus displayed sequentially at a sufficiently high rate that the observer sees a composite "full color" image. In early models, this was one rotation per frame. Now, most systems operate at up to 10x the frame rate.
of a single-chip DLP depends on how unused light is being disposed. If the unused light is scattered to reflect and dissipate on the rough interior walls of the DMD / lens chamber, this scattered light will be visible as a dim gray on the projection screen, when the image is fully dark. Deeper blacks and higher contrast ratios are possible by directing unused HID light away from the DMD / lens chamber into a separate area for dissipation, and shielding the light path from unwanted internal secondary reflections.
DLP projectors utilizing a mechanical spinning color wheel may exhibit an anomaly known as the "rainbow effect". This is best described as brief flashes of perceived red, blue, and green "shadows" observed most often when the projected content features high contrast areas of moving bright or white objects on a mostly dark or black background. Common examples are the scrolling end credits of many movies, and also animations with moving objects surrounded by a thick black outline. Brief visible separation of the colours can also be apparent when the viewer moves their eyes quickly across the projected image. Some people perceive these rainbow artifacts frequently, while others may never see them at all.
This effect is caused by the way the eye follows a moving object on the projection.
When an object on the screen moves, the eye follows the object with a constant motion, but the projector displays each alternating color of the frame at the same location for the duration of the whole frame.
So, while the eye is moving, it sees a frame of a specific color (red, for example).
Then, when the next color is displayed (green, for example), although it gets displayed at the same location overlapping the previous color, the eye has moved toward the object's next frame target.
Thus, the eye sees that specific frame color slightly shifted.
Then, the third color gets displayed (blue, for example), and the eye sees that frame's color slightly shifted again.
This effect is not perceived only for the moving object, but the whole picture.
Additionally, multi-color LED-based and laser-based single-chip projectors are able to eliminate the spinning wheel and minimize the rainbow effect, since the pulse rates of LEDs and lasers are not limited by physical motion. "Three-chip DLP projectors have no color wheels, and thus do not manifest this [rainbow] artifact."
A three-chip DLP projector uses a prism to split light from the , and each
of light is then routed to its own DLP chip, then recombined and routed out through the . Three chip systems are found in higher-end home theater projectors, large venue projectors and DLP Cinema projection systems found in digital movie theaters.
According to DLP.com, the three-chip projectors used in movie theaters can produce 35 trillion colors[]. The human eye is suggested to be able to detect around 16 million colors[], which is theoretically possible with the single chip solution. However, this high color precision does not mean that three-chip DLP projectors are capable of displaying the entire
of colors we can distinguish (this is fundamentally impossible with any system composing colors by adding three constant base colors).
In contrast, it is the one-chip DLP projectors that have the advantage of allowing any number of primary colors in a sufficiently fast color filter wheel, and so the possibility of improved color gamuts is available.
DLP technology is light-source agnostic and as such can be used effectively with a variety of light sources.
Historically, the main light source used on DLP display systems has been a replaceable high-pressure
unit (containing a quartz arc tube, reflector, electrical connections, and sometimes a quartz/glass shield), whereas most pico category (ultra-small) DLP projectors use high-power LEDs or
as a source of illumination.
For , during start-up, the lamp is ignited by a 5&20-kilovolt pulse from a current-regulating ballast to initiate an arc between two electrodes in the quartz tube. After warmup, the ballast's output voltage drops to approximately 60 volts while keeping the relative[] current high. As the lamp ages, the arc tube's electrodes wear out and light output declines somewhat, while waste heating of the lamp increases. The lamp's end of life is typically indicated by an LED on the unit or an onscreen text warning, necessitating replacement of the lamp unit.
When a lamp is operated past its rated lifespan, the efficiency declines significantly, the
may become uneven, and the lamp starts to operate extremely hot, to the point that the power wires can melt off the lamp terminals. Eventually, the required startup voltage will also rise to the point where ignition can no longer occur. Secondary protections such as a temperature monitor may shut down the projector, but a thermally overstressed quartz arc tube can also crack and/or explode. However, practically all lamp housings contain heat-resistant barriers (in addition to those on the lamp unit itself) to prevent the red-hot quartz fragments from leaving the area.
The first commercially available LED-based DLP HDTV was the
HL-S5679W in 2006, which also eliminated the use of a color wheel. Besides long lifetime eliminating the need for lamp replacement and elimination of the color wheel, other advantages of LED illumination include instant-on operation and improved color, with increased color saturation and improved color gamut to over 140% of the . Samsung expanded the LED model line-up in 2007 with products available in 50-, 56- and 61-inch screen sizes. In 2008, the third generation of Samsung LED DLP products were available in 61" (HL61A750) and 67" (HL67A750) screen sizes.
Ordinary LED technology does not produce the intensity and high-lumen output characteristics required to replace arc lamps. The special patented LEDs used in all of the Samsung DLP TVs are
LEDs, designed and manufactured by US-based Luminus Devices. A single RGB PhlatLight LED chipset illuminates these projection TVs. The PhlatLight LEDs are also used in a new class of ultra-compact DLP front projector commonly referred to as a "pocket projector" and have been introduced in new models from LG Electronics (HS101), Samsung electronics (SP-P400) and
(XJ-A series). Home Theater projectors will be the next category of DLP projectors that will use PhlatLight LED technology. At InfoComm, June 2008 Luminus and TI announced their collaboration on using their technology on home theater and business projectors and demonstrated a prototype PhlatLight LED-based DLP home theater front projector. They also announced products will be available in the marketplace later in 2008 from
and other companies to be named later in the year.
Luminus Devices PhlatLight LEDs have also been used by
in their DLP-based
display system. It is a modular system built from small (20&inch diagonal) rear projection cubes, which can be stacked and tiled together to form large display canvasses with very small seams. The scale and shape of the display can have any size, only constrained by practical limits.
The first commercially available laser-based DLP HDTV was the
L65-A90 LaserVue in 2008, which also eliminated the use of a color wheel. Three separate color lasers illuminate the
(DMD) in these projection TVs, producing a richer, more vibrant color palette than other methods. See the
article for more information.
DLP Cinema systems have been deployed and tested commercially in theatres since 1999. In June 1999,
was the first movie to be entirely scanned and distributed to theaters. Four theaters installed digital projectors for the movie's release. The same was done for the
that . Later that year,
was the first movie to be entirely created, edited, and distributed digitally, with more theaters installing digital projectors for its release.
DLP Cinema was the first commercial digital cinema technology and is the leading digital cinema technology with approximately 85% market share worldwide as of December 2011. Digital cinema has some advantages over film because film can be subject to color fading, jumping, scratching and dirt accumulation.
Digital cinema allows the movie content to remain of consistent quality over time. Today, most movie content is also captured digitally. The first all-digital live action feature shot without film was the 2002 release, Star Wars Episode II: Attack of the Clones.
DLP Cinema does not manufacture the end projectors, but rather provides the projection technology and works closely with Barco, Christie Digital and NEC who make the end projection units.
DLP Cinema is available to theatre owners in multiple resolutions depending on the needs of the exhibitor.
These include, 2K & for most theatre screens, 4K
- for large theatre screens, and S2K, which was specifically designed for small theatres, particularly in emerging markets worldwide.
On February 2, 2000, Philippe Binant, technical manager of Digital Cinema Project at
in , realized the first digital cinema projection in
with the DLP CINEMA technology developed by Texas Instruments. DLP is the current market-share leader in professional digital movie projection, largely because of its high contrast ratio and available resolution as compared to other digital front-projection technologies. As of December 2008, there are over 6,000 DLP-based Digital Cinema Systems installed worldwide.
DLP projectors are also used in
theatres for .
This section needs additional citations for . Please help
by . Unsourced material may be challenged and removed.
(May 2016) ()
Since being introduced commercially in 1996, DLP technology has quickly gained market share in the front projection market and now holds greater than 50% of the worldwide share in front projection in addition to 85% market share in digital cinema worldwide. Additionally, in the pico category (small, mobile display) DLP technology holds approximately 70% market share.
Over 30 manufacturers use the DLP chipset to power their projection display systems.
Smooth (at 1080p resolution), jitter-free images
Perfect geometry and excellent grayscale linearity achievable
Usually excellent
The use of a replaceable light source means a potentially longer life than CRTs and plasma displays (this may also be a con as listed below)
The light source is more-easily replaceable than the
used with LCDs, and on DLPs is often user-replaceable.
The light from the projected image is not inherently .
New LED and laser DLP display systems more or less eliminate the need for lamp replacement.
DLP offers affordable 3D projection display from a single unit and can be used with both active and passive 3D solutions.
Lighter weight than LCD and plasma televisions
Unlike their LCD and plasma counterparts, DLP screens do not rely on fluids as their projection medium and are therefore not limited in size by their inherent mirror mechanisms, making them ideal for increasingly larger high-definition theater and venue screens.
DLP projectors can process up to 7 separate colors, giving them a wider color gamut.
Some viewers are bothered by the "rainbow effect" present in colour-wheel models - particularly in older models (explained above). This can be observed easily by using a camera's 'live view' mode on projected content.
Rear projection DLP TVs are not as thin as LCD or plasma flat-panel displays (although approximately comparable in weight), although some models as of 2008 are becoming wall-mountable (while still being 10" to 14" thick)
Replacement of the lamp / light bulb in lamp-based units.
The life span of a mercury lamp averages
hours and the replacement cost for these range from $99 & 350, depending on the brand and model.
Newer generations' units use LEDs or lasers which effectively eliminate this issue, although replacement LED chips could potentially be required over the extended lifespan of the television set.
Some viewers find the high pitch whine of the color wheel to be an annoyance. However, the drive system can be engineered to be silent and some projectors don't produce any audible color wheel noise.
Dithering noise may be noticeable, especially in dark image areas. Newer (post ~2004) chip generations have less noise than older ones.
Error-diffusion artifacts caused by averaging a shade over different pixels, since one pixel cannot render the shade exactly
may be affected by upscaling lag. While all HDTVs have some lag when upscaling lower resolution input to their native resolution, DLPs are commonly reported to have longer delays. Newer consoles that have
output signals do not have this problem as long as they are connected with HD-capable cables.
Reduced viewing angle as compared to direct-view technologies such as CRT, plasma, and LCD
May use more electricity, and generate more heat, than competing technologies.
The most similar competing system to DLP is known as LCoS (), which creates images using a stationary mirror mounted on the surface of a chip, and uses a liquid crystal matrix (similar to a ) to control how much light is reflected. DLP-based television systems are also arguably considered to be smaller in depth than traditional projection television.
This article uses material from the Wikipedia article
, which is released under the
. There is a list of all
in Wikipedia
3D Printing Dictionary
OpenLAB, Fablab, OpenSCAD, FreeCAD, BRL-CAD, RhinocerosCAD, LibreCAD, Vectary, 123D, TinkerCAD, Wings 3D, MOI3D, leapfrog 3D, Geomagic, Paint3D, STLfinder, Yeggi, Yobi3D, 3D Shape Search, PARTcloud, Thingiverse, GrabCAD, AMF, Additive Manufacturing, STL, Stereolitography, Mesh, MeshMixer, Free Download, lowpoly, 3D voxel,things, digital design, physical objects, rapid prototyping, 3D objects, 3D printing, reprap, fabrication, laser cutter,abs