Proceedings PaperDesign considerations and applications for innovative display options using projector arrays
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Groups of video projectors can be arrayed into electronic displays that offer larger, brighter, and higher resolution images. This paper provides a broad overview of the design considerations and opportunities inherent in arraying projectors in a group. A projector array provides: increased image size, increased image brightness, increased image resolution, reduced projection distances, and increased depth of focus. Although video walls are the most common example of electronic image arrays, the limiting factor of traditional video walls is the visual segmentation. Minimizing the segregation between arrayed images is highly desirable with the goal being to make the segregation indistinguishable. Overlapping and seamlessly blending multiple video projectors into a single composite image goes a long way toward eliminating the segregation of projector elements and opens the way to many new practical applications. This is particular significant in displaying computer graphics. Computers have the ability to generate multi-channel composite images at resolutions that far exceed traditional electronic media and even the maximum resolution of any single monitor or projector. These images can then only be displayed using an arrayed system. The challenge is to make the entire projection array behave as a single imaging device. This can seem to be a daunting task with large arrays, but one whose solutions are already closer. Consider that a typical CRT projector is, in fact, an array of three projectors (R, G, & B) engineered into a single plastic housing and arrayed in a superimposed and converged geometry. Similarly, an array can be managed with integrating electronics to create a `virtual' packaging around multiple projectors, arrayed in adjacent and registered geometries, with the entire package behaving as a single cohesive imaging device.