Patent ID: 8630549
Filing Date: 2014-01-14
Classification: H04B

Abstract:
1. A visible light communication apparatus, comprising: a brightness signal generator that makes a pulse width of an ON section pulse to be adjusted according to brightness requirement information by using a duty cycle corresponding to a turn-on period of a visible light source per bit unit time; an illumination driver that adjusts a pulse position of the ON section pulse to distinguish bit data for representing “1” from bit data for representing “0” for each bit unit time while the pulse width of the ON section pulse is sustained for a respective period; a transmittable or non-transmittable determining unit that determines whether the duty cycle is an applicable duty cycle or not; and a transmission data outputting unit that outputs transmission data to be transmitted using the pulse position of the ON section pulse according to the determining result of the transmittable or non-transmittable determining unit, wherein the ON section pulse has a constant pulse amplitude, and has the pulse width for adjusting brightness, wherein the pulse position is one of two positions in the bit unit time, wherein the pulse position corresponds to