For a usual single projection system, the accuracy of image positioning on the screen and image brightness uniformity in all points of the screen are less essential for the viewer’s perception than, for example, color rendering quality. For a split-screen system (video wall) these parameters are crucial. Because of even minor deviations in these characteristics, it may happen that the split-screen image can be not perceived as a single whole and the image cannot be adjusted by adjustment means. Exactly for this reason, for example, the index of video cube brightness uniformity usually exceeds 95%.
The requirements to video cubes mechanical structure are increased as well. The accuracy of screen manufacturing and their manner of fastening determine the size of gap between separate modules in the videowall. Formerly a centimetric gap seemed to be perfectly allowable, but at present its typical value usually does not exceed 1 mm, and for many modules it can be noticeably less. The gap between eyevis EC video cubes do not exceed 0.3 mm.
Special design measures are taken for cooling of in-cube projection equipment and for optical system protection against dust. The cooling air is fed to the cube through a filtering element, at that increased air pressure is being developed inside preventing the penetration of dust into the internal space of the cube through loose connections. In eyevis EC video cubes a closed-type projector is used, this prevents dust penetration inside the projector.
It is essential to mention as well that in order to provide the stability of parameters and to simplify the adjustment of the videowall after its installation or after the replacement of failed consumable elements, the video cube designers use the special technologies that make it possible during replacement of video cube optical components (lamps) to compensate the technological variation of their parameters at the system level. Thus, eyevis EC video cubes are equipped with special technology that allows to equalize automatically the color temperature level, brightness and contrast.
The lamp module with the life time of 6-10 thousand hours turns out to be a critical element of video cube in respect to its reliability. Recently, two-lamp light modules supporting several modes of behavior are used in order to provide uninterrupted operation even in case of lamp failure. The mode for most important applications provides the power supply to both lamps, one of them provides the work of projection system and the second is kept “hot standby”. In case of working lamp failure, the in-built automatic equipment shall instantly replace it with the standby one. Eyevis EC cubes can be supplied both with one — and two-lamp system (depending on the Customer’s wish).
Nowadays, the great majority of video cubes in the world employ either Liquid Crystal (LCD) or Digital Light Processing (DLP) projection technology, the latter by the present time has become the dominating one as long as it has a number of indisputable advantages over LCD-technology. The main advantage is the absence of pixel burn-out. The eyevis video cubes are produced applying DLP-technology.
The modern video systems allow different ways of signal sources connection.
The video cubes with 50" to 70" screen diagonals are most spread. However, the devices with a larger diagonal (84" and 100") are offered in the market as well. The optical resolution of the cube is in no way connected with its screen dimensions and is determined only by the capacities of the in-built projection module. In most cases it makes from 800x600 to 1280x1024 dots, although there are modules for 1600x1200 dots as well. The depth of cube, on the contrary, usually depends on the size of the screen and usually makes 60 to 100 cm and more.
Eyevis EC video cubes are supplied with 50", 65", 67", 70", 84" and 100" screen diagonal.
“Seamless screen”. The gap between modules makes only 0.3 mm.
Intelligent color wheel. If the modules are replaced, the colour adjustment remains the same. 
Brightness correction. Capability of brightness automatic correction based on outer illumination.
Optimized lamp changing concept. No need to restart after changing the lamp (hotswappable).
Intelligent lamp system. During the exchange of lamps, status messages and characteristics are automatically saved.
Data Base Solution. Data base open interface allows connection to other applications and exchange of information.
Status Solution. Very simple, but comprehensive monitoring of the system and its separate elements.
