Projection Display Brightness via Segmented Optical Channels

The image generator is divided into multiple subimage regions (first subimage, second subimage, etc.) that are projected through separate optical channels. Each subimage is projected by dedicated projection optics, allowing the system to maintain high brightness by distributing the luminous flux across multiple channels while keeping the overall system compact. The superposition of these subimages forms the complete picture.

The patent transitions from a single-channel projection system to a multi-channel system by adding the dimension of multiple optical paths. The beam splitter arrangement creates separate optical channels that process different subimages simultaneously, effectively utilizing spatial dimensionality to overcome the brightness limitation imposed by miniaturization.

Instead of using a single large image generator that would require a long optical path, the system segments the image into multiple smaller subimages. Each subimage is projected through its own compact optical channel, allowing the system to achieve high brightness without increasing the overall design length. The multiple short channels are combined via beam splitters rather than requiring one long channel.

The patent merges multiple compact projection channels at the beam splitter location to achieve the equivalent effect of a larger image generator. By combining the optical paths of multiple channels that each handle smaller subimages, the system achieves high luminous flux transmission without requiring a proportionally long system design length.