[Danish SVS rear-projection large screen and related application mode] Engineering projection screen technology introduction

SVS Denmark rear projection large screen

100-inch SVS Denmark WA1806 100-inch rear projection hard screen size 2083mm (width) × 1575mm (height), WA1806　100-inch screen center gain is greater than or equal to 5Gb. The brightness uniformity from the center to the edge of the screen is greater than or equal to 90%. The horizontal viewing angle is greater than or equal to 160 degrees, and the vertical Vision 2000 is greater than or equal to 90 degrees\WA1806 is greater than or equal to 60 degrees. The splicing screens can eliminate the mutual interference of the projection light path of the adjacent screens. The screen resolution ranges from 640×480 to 1600×1200.

The 120-inch SVS Denmark WA1806 120-inch rear-projection hard screen is flat, firm and not deformed. The screen size is 2489mm (width) × 1880mm (height), and the center gain of the screen is greater than or equal to 5Gb. The overall uniformity of the screen is greater than or equal to 90%. The horizontal viewing angle is greater than or equal to 160 degrees, and the vertical viewing angle is greater than or equal to 60 degrees. The splicing screens can eliminate the mutual interference of the projection light path of the adjacent screens. The screen resolution is from 640×480 to 1600×1200.

The Vision 2000 of Denmark's SVS company is a 150-inch rear-projection hard screen with a flat, firm and non-deformed screen. The size is 3108mm (width) × 2346mm (height), the center gain of the screen is 3Gb, and the brightness uniformity from the center to the edge of the screen is good. The uniformity is greater than or equal to 90%. Half-gain viewing angle: The horizontal direction is greater than or equal to 33 degrees, and the vertical direction is greater than or equal to 33 degrees. The stitching between the screens is 1mm. The splicing screens can eliminate the mutual interference of the projection light path of the adjacent screens. The screen can clearly display images with a resolution from 640x480 to 1600x1200.

Several forms of rear projection display applications

1. Single-machine, single-screen, single-screen application mode

A stand-alone single-screen projection display system composed of a projector, a rear projection screen, a reflection system (optional) and a structure is the simplest rear projection system that sends the signal source (video or computer graphics) Into the projector, through the projector to project on the projection screen, widely used in business presentations, multimedia teaching, conference rooms and other occasions.

2. Single-machine, single-screen, multi-screen application mode

On the basis of a single machine and a single screen, a multi-screen projection display system composed of a multi-screen image processor. At present, the brightness and resolution of the projector are very high, and the image can be projected on a large screen. In certain occasions, a single-screen multi-screen display composed of a projector and a multi-screen image processor can satisfy The need for multiple signal display saves space and investment. The working principle of the multi-picture image processor is similar to the display of a computer window, except that the multiple pictures displayed in the computer window are generated by the operating system, and the multiple pictures (signal sources) in the projection display are input from the outside. Time base correction and synchronization are required between.

3. Multi-machine single-screen application mode

A rear-projection display system composed of multiple projectors, a rear-projection screen (only for scattering screens), a reflection system (optional) and a structure, plus an image processor to realize single and multi-screen display. This application is not recommended due to the solar effect of the screen.

4. Multi-machine multi-screen application mode

Multi-camera multi-screen application refers to putting multiple independent rear projection systems together. Each projection display screen is independent of each other and has no connection. It does not use an image processor, as long as all input signals are synchronized directly. It is enough to output to each projector. Each display picture 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.

5. Rear projection display wall

A. Rear projection display wall:

[ Different from multi-screen display). All input signals are processed by the image controller and then distributed and output to each projector. Each display image can (but not necessarily) cross the boundary of the projection screen. Usually, but not necessary, the smallest gap between image units should be ensured. Usually, but not necessarily, use rear projection display.

B. Classification of rear projection display wall:

What is used only for video display is called a TV wall, and what is used for computing graphic display becomes a computer wall. There is no strict distinction between a TV wall and a computer wall, but each has its own characteristics.

C. Advantages and applications of rear projection display wall:

This display method has the characteristics of unlimited display size and small footprint. Video walls are widely used in public places such as television stations, airports, docks, exhibition halls, shopping malls, etc. Computer walls are widely used in transportation, aviation, water transportation, telecommunications, public security, electric power, military command, dispatch and control centers.

D. How to realize the rear projection display wall

There are two ways to realize the rear projection display wall, one is to use a standard projection unit and graphics controller, and the other is to select the appropriate projector, projection screen, and graphics according to the needs of the customer and the specific situation of the use site Controller and projection method and structure method design and manufacture, called field splicing