Abstract
Transmissive liquid-crystal (LC) display (LCD) devices are being extensively used for man-machine interfaces. A transmissive or transflective LCD requires a backlighting unit (BLU) which is an indispensable device for an LCD. In early time of the LCD-emerging period (1980-95), lack of light ray control and optical design concept were the main issues of BLUs. In order to build up an optical concept for BLU design, for first time, the author devised and developed functional BLU using micro-reflector (MR) and micro-deflector (MD) for light control media, i.e., lightguide plate (LGP) and optical cavity, based on the total internal reflection (TIR) and nearly frustrated TIR (FTIR). The BLU issues were substantially solved and the luminance on the BLU increased and angular luminance cone was controlled that resulted in saving power consumption of the LCDs. In the meantime, the author developed novel fabrication process to accelerate the mass productions of the LGPs by 8-10 times by using metallic sheet pattern of MRs and MDs.
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