KEYBOARD Russian patent published in 1995 - IPC

FIELD: computer engineering. SUBSTANCE: device has board 1 having light distribution unit with light guides, light receivers 4 and deflector 5 which functions as request units. Light distribution unit is made as plates with light guides which are arranged in perpendicular rows. Horizontal row plates 3 are made as comb, vertical row plates are located between rods of horizontal row plates. Ends of light guides which are perpendicular to outer side of plates 2 and 3 provide possibility for illumination from outer sources to enter in light guide at acute angle. EFFECT: increased functional capabilities. 2 cl, 4 dwg