среда, 2 января 2008 г.

Power Projector based on moving LEDs

At present there are commercially acceptable power LEDs which light flux is above 100 lumen. In this case the light flux of 20-30 such LEDs is equal to the light flux of usual projector. The matrix of thousands or tens of thousands such LEDs can be used. In this case we can have a projector which light flux surpasses the light flux of conventional projector by a factor of 1000 at least.
But resolution of images formed even such number of LEDs is small enough. To increase the resolution it is suggested to move the image of LEDs on a screen along some closed trajectory. In this case such trajectory in its destination is analogous to one string in TV screen. Like a set of 625 strings forms TV picture, a set of several thousand of the trajectories forms a picture on a large screen
We have the method for conversion of any image into a set of pulse sequences for each LED, which provide production of the image on any screen arbitrary oriented in space. Using this method enables to form an image on the screen by several projectors arbitrary located relatively the screen. Images, produced by each projector can intersect that is they can have common regions. By means of software the problem of common regions is solved completely.
This possibility enables to increase gradually the number of projectors which can produce fragments of image in various regions of the screen. The same method is used at present for purpose of illumination of great areas. Many relatively small lamps located at relatively small distance from the area are used instead of one power lamp located at great distance from the area.
Similar projectors can be used for production of images on standard advertisement boards of 6*3 m size. As is known, the boards are shined by projectors emitted homogeneous light. Using considered projectors enables to produce any dynamic images.

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