Wednesday, December 29, 2010

【 Weak current College 】 edge integration technology 】

The pursuit of beautiful large screen, pure color, high resolution display, has always been the experience of a potential requirements. The command control center, Network Management Center, small-to-video conference, academic reports, technical talks and multifunctional meeting, on the big screen, more color, high brightness, high resolution display desire more and more strongly, while traditional television wall, projection screen and case hard Mosaic Mosaic wall and so hard to meet people's requirements in this regard. Recently, the rapid rise of edge integration technology in recent years the emergence of a new seamless splicing technology, it improves the mosaic image of the Visual effects, which are gradually becoming adapted to the needs of effective approaches.
I. What is edge integration technology
Edge integration technology is a set of images projected from a projector to edge overlap, and through fusion revealed a gap brighter, extra large, high resolution of the whole picture, the picture effect is a projection of video projectors.
When two or more projectors projecting a combination of both sides, part edge image light overlap, the most important functions blending is to bring two sets of projector, overlap some light brightness gradually lowered so that the brightness of the whole picture.
Second, the edge and merged the advantages
1. increase the image size; the integrity of the screen
Many projectors projecting out of screen splicing than a single projector projection from the greater screen size; bright beautiful images to bring people to extraordinary Visual impact, have not sewn the edge Fusion splicing of the screen, to a large extent ensured the integrity of the screen and color consistency (shown below).

2, increasing the resolution
Each projectors projecting part of the entire image, showing the image resolution is improved. For example, a physical resolution of the projector is 800 x600, three projectors fusion 25%, the resolution of the image becomes a 2000 x600.
3, ultra-high resolution
With the use of a multiple-channel high resolution output image processor and the computer, you can produce per channel for 1600x1200 pixels of three or more channels of synthetic images. If integration of 25% of pixel, you can subtract the superfluous overlap pixels generated 4000x1200 resolution image. Currently on the market yet to be such a high resolution operation of independent monitors. The solution is to use projector matrix, each projector is at its maximum resolution, the resolution of the synthesis is reduced after the overlap area pixel sum.
4. reduce the projection distance
With the emergence of seamless connection, projection distances shorten become inevitable. For example, the original 200 inches (4000x3000mm) screen, if the request does not have physical and optical slot, we will only use one computer projector, projection distance = lens x screen width, using optical angle lens 1.2: 1, our projection distance to 4.8 m, now, we have adopted a financial edge technologies, the same picture no traces of various joints, we only need 2.4 distance.
5. the special shape of the projected image on the screen
For example, cylindrical or spherical projection of images on the screen, a single projector will require long projection distance can cover the entire screen, but many projectors combine not only to make the projection screen size and projection distance reduced, so that the arc wire spacing can be reduced to minimal, image resolution, luminance and aggregation effect is a better choice.
6. increase screen level
As a result of the edge integration technology, screen resolution, brightness enhanced, while at the same time meet the high quality of the projection screen, you can make the entire display system screen layered and expressiveness.
Third, the edge and merged the system and the differences between traditional stitching
Edge Fusion splicing system and compare traditional mosaics, mainly has the following differences:
1, in the traditional stitching system, as the use of multiple blocks of single screen form a screen display of individual screens while using the same materials between, but due to production time and production environment, make different thermal expansion or contraction of the screen there is an objective difference, which causes the entire system in use for some time there will be some small physical changes, thus affecting the entire system stability and effectiveness. While Fusion splicing with a block of the screen, making time, materials, technology level, eliminating the risk.
2, in Fusion splicing, as a result of using the whole screen, so it eliminates traditional mosaics of physical gap between screen, allowing screen display image whole intact, with no one to split. But after using fusion technology, but also eliminates the optical slot, and a regular hard concatenation system compared to the skill level and display the results, there is a qualitative difference and improve, so that the display of images, no physical or optical Division to ensure the completeness and image displayed on your pages. This display maps, drawings, and other image information is even more important when, as in the drawings, maps with lots of lines or routes, crevice and optical slot-the screen will cause the image to display, easy to make the observation of personnel to displayed image lines and splicing system itself as one of the lines incorrectly, causing the decision-making and research. Through the integration process, you can avoid this situation.
3, in Fusion splicing system, all images are fusion processor for correction and consolidated, so in the big screen for the image to display and switch, no matter what the format of the image to switch to full screen brightness, color, colorful, and uniformity are relatively consistent, no traditional stitching system often appears as a signal to replace the system display quality changes.
4, in Fusion splicing systemCommission, because in the processor on the projection display image, can be of different color difference between the projected signal, lit, uniformity, it also makes the system shows the image quality is better than traditional stitching system.
5, the edge and merged the image processor in addition to the edge and merged and image processing functions of multiple images, but also has an image and call the function, you can put their own storage of high resolution images directly as large-screen display system of background, in the actual use of great practical value.
4. edge integration technology way
In practice there is usually one of three ways:
1 wide angle arrange 2 many projectors produce vertical stacked vertical display; 3 many projectors stacked up higher and more wide of super large screen v. fusion system application equipment analysis
1, projector
Considering the high brightness, high reliability and high uniformity requirements, we recommend using the following projectors CRT, LCD, a-, three-chip DLP chip polysilicon LCD projection display technology after three piece of the newest generation of high contrast D L P projection display system. It to red, green, blue three DMD (Digital Micormirror Device) digital micromirror as an imaging device. Each DMD consists of many micro-mirror, each micromirror corresponds to one pixel, the physical resolution DLP projector is determined by the number of micro-lens. DLP projector technologies is a full digital reflective projection technology. Its main characteristics are as follows:
A. digital advantage
The introduction of digital technology, so that the image grayscale, image noise disappear, picture quality is stable, extremely precise digital images.
B. seamless advantage
You can display high-quality seamless image. The same pixel, DLP projection function to produce a sharp picture even, color and more high-quality seamless image.
C. display
DLP Projection unit of luminance uniformity, color uniformity, grayscale, and other specifications and the actual display effects than conventional CRT, LCD to Excel, especially suitable for large-screen projection display.
Optical core life
According to the United States Texas Instruments ' DLP technology white papers, the core life up to 100, 000 hours, the absence of a LCD projector as working temperature high and an LCD Panel aging issues, especially suitable for high-brightness display environment.
2, edge fusion processor
Edge fusion processor is the one that you easily from the independent screen shows a transition to multiple projectors generated seamless widescreen presentation core equipment.
Edge integration, multiple input source select, seamless switching, image processing and operator control functions entirely by a big screen processor implementation and operation, to meet the support multiple window display, and with seamless integration of widescreen signal to background picture display shows the number of application requirements. Processor video processing, including data replication, to generate the overlap in the projection area, as well as overlapping image edge feathering. Data duplication and edge feathering of cross data range is user programming.
Thanks to this processor screen splicing and edge integration process, the entire system can implement the following features:
(1), more signal input
According to the requirements, the system can be configured for multiple signal input, each input can be in high resolution. For multi-screen installation, each signal source enter installation screen of quantity is copied.
(2), multiple channel output
(3), various effects control such as:
Windows control
Can pixel precision defines the position and size of the window, which displays the input window.
Digital Zoom
In each window, image scaling is required.
Effects control
Select generate strange shapes overlap, the mirror effect, a shadow for three-dimensional effect, fade, fly in fly out, etc.
Order control
The overlay window can dynamically present, users can decide to either place before and after the order of the window.
Edge integration
Built-in edge integration capabilities and feather characteristics can produce smooth panorama overlap.
Intuitive and simple control software
Control software through friendly management interface, digital, user-friendly for signal select, display layout, display processing of various management functions.
3. control end
Edge blending control can use computers, control desktop centrally control system.
4, signal source
Composition of the edge and merged the system signal sources can be varied. For example now works in commonly used are: VGA (notebook, desktop, graphics workstation), Video (camera, DVD) as well as DVI, SDI (broadcast signal source) HD SDI and so on.
5. screen
In the large-screen projection system overall funding ratio, the screen may only take up less part of, but for the entire system of effect, it is essential, if you select the projection screen, is equivalent to the entire system sets a bottleneck, regardless of how the system other equipment performance, overall excellent Visual effects will be, unable to put the system in perfect performance fully demonstrated.
In previous projection system, due to technical limitations, the brightness of the projector is unable to do so is very high, so in order to increase the projection brightness. On the screen usually requires a relatively high rate of gain, but it will affect the degree of contrast and color and smooth.
Now the development of the projection technology is very rapid, projector brightness is not a problem, so the requirements on the projection screen, gain rate is placed in a lower position, while the main screen of flatness, angle of contrast and uniformity.
6. Design edge integration steps
1. determine the approximate size
2. determine the number of the projector
3. Select projector (determine projector brightness, resolution, camera);
4. Select screen (consider screen gain, evenness and flatness);
5. Select fusion processor;
6 preset soft edge integration of regional value;
7. install and calibrate the screen and projector
8. Debug test system and testing.

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