A thin-profile, optically efficient lighting device for use with, among other things, flat information displays, includes a combination of three optically coupled light propagating structures, fabricated of electromagnetic flux transmitting materials. If the search is unsuccessful, the imaging scheme is switched to that in which the high-magnification reference image is acquired from a chip adjacent to the defective region. Each optical beam may have a defined optical path originating from an optical source and terminating at an optical sensor within the module. In response to the data volume of the I frames being too large when compared to the data volume of the P frames, the input video data is coded again to produce I frames having a smaller data volume.