Over the years, DLP rear projection splicing has always occupied the leading position in the entire large-screen splicing market, and the unique "zero stitching" status of rear projection splicing is unsurpassed. However, as a very professional large-screen display device-rear projection splicing has prevented many users from approaching it. Today, the projection era network will briefly introduce the rear projection splicing method and light source. Interested users must pay attention to it.
In simple terms, rear projection splicing can be divided into: single-machine single-screen single-screen rear projection display application mode, single-machine single-screen multi-screen rear projection display application mode, multi-machine single-screen rear projection display application mode, multi-machine multi-screen rear projection Display application mode, rear projection display wall, etc.
Single-machine single-screen rear projection is a single-machine single-screen projection display system composed of a projector, a rear projection screen and a reflection system (optional), and structure. It is the simplest rear projection system and integrates a signal source (video or computer) Photo) sent to the projector, projected onto the projection screen through the projector, widely used in business presentations, multimedia teaching, conference rooms and other occasions; and single-machine single-screen multi-screen rear projection display is based on the single-machine single-screen, cooperate Multi-screen image display (MultiVisionProcessors) multi-screen projection display system.
The multi-machine single-screen rear projection display is a rear projection display system composed of multiple projectors, a rear projection screen (only limited to the scattering screen) and a reflection system (optional), and a structure. , Multi-screen display; multi-machine multi-screen rear projection display refers to putting multiple independent rear projection systems together, each projection display screen is independent of each other and is not connected, without using an image processor, as long as all input The signal can be directly output to each projector after being synchronized. Each display can only be displayed in its own area without crossing the boundary of the projection screen, and there is no technical requirement for the connection between the projection screens.
The rear projection display wall is a large-screen display system composed of multiple projectors, multiple projection screens, and image controllers, and is generally used for a large-screen display or special effect display of one screen and a multi-window display of multiple screens (different from the multi-screen display) Screen display). All input signals are processed by the image controller and distributed to each projector. Each display can (but does not have to) cross the boundary of the projection screen. Usually but not necessarily, the smallest gap between the image units should be ensured. Usually, but not necessarily, display with rear projection.
DLP rear projection splicing light source tips
Large-screen splicing products first originated in 1992. The light source has gone through the development stage of metal halogen lamps, ultra-high pressure mercury lamps, xenon lamps, LED light sources and so on. At present, the most commonly used are ultra-high pressure mercury lamps, including UHE bulbs like Epson and UHP bulbs of PHILIPS. Among them, UHP has a long service life and low brightness attenuation, and is widely used in current DLP splicing wall systems.
Here I want to focus on the introduction of LED light sources. LED light source technology is the most revolutionary breakthrough in DLP splicing large screens in recent years. Compared with traditional light sources, LED light sources have obvious advantages. At present, many leading manufacturers, including GQY, Vitron, Juyang, Barco, Christie, etc. have all launched DLP splicing units using LED light sources.
LED light source has the following characteristics:
long life. The life of UHP bulbs commonly used in DLP splicing large screens is between 3,000 and 6,000 hours. The cost of thousands of dollars for a UHP bulb has become the largest maintenance consumable for rear projection splicing walls. LED light sources usually have a life span of more than 50,000 hours. The DLP splicing screen does not need to replace the light source almost for life, saving a lot of application costs.
Wide color gamut. The LED light source has a wider color gamut, higher color saturation, better color expression, and brings better image quality. This is another DLP projection in terms of color after BrilliantColor. progress.
No color wheel. In DLP projectors that use traditional light sources, the color wheel is a component that is relatively easy to damage and affects the overall life and generates a certain amount of noise. After using three primary colors of LED light source, the DLP projector can eliminate the use of the color wheel, which reduces noise , Improve overall life.
In addition, the LED light source has the advantages of low power consumption and low heat generation, and it also improves the consistency of the overall brightness and contrast of the DLP spliced ​​large screen.
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