The visualization of high-resolution data can be done in different ways. Below you can read briefly and compactly about the possibilities and the respective advantages and disadvantages.
A common feature of the following solutions is that they are all capable of displaying image signals. Single sources or even several sources can be displayed simultaneously. The size and position of the individual display windows can be flexibly adjusted over the entire surface.
The following factors should be taken into account when choosing the system:
- Local conditions and space requirements
- Financial leeway
- Light conditions and noise perception
- Homogeneity of the image
- Desired resolution
We will be happy to assist you in selecting the system that best suits your needs. We would like to present the following possibilities:
Simple presentation of complex data
Front projection
Front projection is the simplest variant and is also known as “classical projection”. The advantages of this solution are:
- Cost-effective
- Easy installation
- Space-saving
- A maximum resolution of 4096 x 2048 pixels is possible with one projector.
- The resolution can be significantly increased by several projectors placed side by side.
- An image processor realizes the display of different image sources on the projection surface.
A major disadvantage of front projection is the light beam that passes through the room. People who are in front of the projection surface and look into the room can be dazzled and thus be impaired in their actions.
There is also the “danger” of a shadow falling on the projection. The installation location should also be chosen very carefully, as the projectors are usually placed in the working room. In this context, it is important to consider the optical and acoustic consequences, as the projectors are sometimes clearly perceptible. It should also be ensured that little light falls on the projection surface.
Rear Projection
As an alternative to front projection, rear projection is also an extremely popular variant. It offers the advantages of front projection and eliminates some disadvantages. The advantages of rear projection are:
- Visually appealing, as no devices are visibly installed.
- In front of the projection surface no disturbing noises are perceptible.
- Continuous and uninterrupted work surface
- A maximum resolution of 4096 x 2048 pixels is possible with one projector
- The resolution can be significantly increased by several projectors placed side by side
- Direct work on the projection surface is possible; there is no risk of shadows or glare
- Insensitive to ambient light
The special feature of rear projection is the space required behind the screen. Depending on the width of the image, a distance of about 2 m behind the projection surface should be expected. The space requirement can be reduced somewhat by using several projectors. Here, too, an image processor can be used, which represents various feed sources and allows their free distribution on the projection surface.
In our opinion, the rear projection is, due to its user-friendliness, perfectly suitable for the equipment of situation centers or control centers.
Rear projection with cubes
Following the principle of large rear projection, an image can also be assembled by individual cube elements. Rear projection cubes offer the following advantages:
- Significantly smaller installation depth than with rear projection
- Almost noiseless
- Rather high resolutions are possible because the resolutions of the individual cubes add up
- If an element fails, only a small piece of the projection is missing, the rest of the system continues to work
- Virtually no technical restrictions with regard to image size
- Absolutely insensitive to ambient light
A major disadvantage compared to the other solutions presented is the very high financial expenditure. However, the financial effort is rewarded with an impressive picture. Visually, the approximately 2 cm wide bars could be eye-catching. Our experience shows, however, that they are hardly disturbing in daily use. A split processor is absolutely necessary for the use of rear-projection cubes, which splits the image between the individual cubes. In addition, the image processor allows the different image signals to be arranged on the wall as desired.
LCD Screens
The construction of a visualization system consisting of several LCD screens is cost-effective and requires only minimal installation effort. The advantages of solutions with LCD screens:
- Very low installation depth (approx. 15 cm).
- Simple assembly
- Little adjustment required
- Low maintenance and running costs (no lamps)
- Image size can be extended almost indefinitely
- Very high resolutions possible
- Financially attractive
- Very bright and insensitive to ambient light
The disadvantages are the bridges between the screens. With current devices, the frame width is only about 2 cm, which significantly reduces the “interference factor”.
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