Patent ID: 8208818

Claim:
A light transmitting apparatus for transmitting transmission data using visible light and infrared light, the light transmitting apparatus comprising: a first modulation section for performing low-speed digital modulation of first data; a second modulation section for performing high-speed digital modulation of second data; a first light transmitting section for alternately emitting and quenching the visible light in accordance with an output signal of the first modulation section to transmit a visible light signal which conveys the first data; a second light transmitting section for changing an intensity of the infrared light in accordance with an output signal of the second modulation section to transmit an infrared light signal, which conveys the second data, in parallel with the visible light signal; and a control section, wherein the high-speed digital modulation performed by the second modulation section is standard modulation or high-rate transmission modulation having a higher data transmission rate than the standard modulation, and the control section causes the second light transmitting section to emit the infrared light signal in accordance with the output signal of the second modulation section, which has been subjected to the standard modulation, during a period of emitting the visible light signal, and to emit the infrared light signal in accordance with the output signal of the second modulation section, which has been subjected to the high-rate transmission modulation, during a period of quenching the visible light signal.