Mobile telephone for optical signal transmission has first and second sets of data-processing components interconnected for transmitting signals via a signal transmission track

摘要

A photodiode (134) designed as an infrared emitter fits on a main board (116). Alongside the photodiode there is a source (144) of light for emitting light visible to the human eye. A display device (124) has a support (126) made from transparent material like glass and a protective layer (146) on the topside (148) on the support. On the support's underside (150) there is a second transparent board (152). Liquid crystal strips run between the support and the second board.