Patent ID: 8165472
Filing Date: 2012-04-24
Classification: H04B

Abstract:
1. An apparatus for transmitting a signal in visible light communication, comprising: a light-emitting element configured to emit visible light, the light-emitting element including an illuminating function; a timing-changing module configured to output a first timing changing signal in accordance with turning off of a switch and output a second timing changing signal in accordance with turning on of the switch, the switch being provided for turning on and off the light-emitting element; a modulation module configured to modulate the signal to transmit in accordance with the first and second timing changing signals and output first and second modulated signals; a drive module configured to drive the light-emitting element in accordance with the first and second modulated signals, wherein the modulation module is configured to output the first modulated signal in accordance with the first timing changing signal and the second modulated signal in accordance with the second timing changing signal, the first modulated signal changing to a first logical level in accordance with the first logical level of the signal to transmit and to a second logical level from the first logical level by a fixed timing, the second modulated signal changing to a first logical level in accordance with the first logical level of the signal to transmit and to a second logical level from the first logical level by a variable timing.