Visible light control apparatus, visible light control...

Details Visible light control apparatus, visible light control... Visible light control apparatus, visible light control...

2006-09-29

2010-06-22

Phan, Hanh (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S182000, C398S189000, C398S186000, C398S196000, C398S197000

Reexamination Certificate

active

07742704

ABSTRACT:
There is provided a visible light control apparatus including: a modulation unit (corresponding to a PPM signal generation circuit, a subcarrier generation circuit, and a first AND circuit) that modulates a subcarrier and thereby generates a modulated signal; a visible light control unit (corresponding to a driving circuit) that controls blinking of visible light which contains information based on the modulated signal modulated by the modulation unit and allows the visible light to be emitted at a predetermined emission time ratio; and an emission time ratio control unit (corresponding to a dimming signal generation circuit, an inverting circuit, a second AND circuit, and an OR circuit) that changes the predetermined emission time ratio and allows the visible light to be emitted at the changed emission time ratio.

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