Patent ID: 11909440
Assignee: SOOCHOW UNIVERSITY
Field: Telecommunications (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A visible light communication system with adaptive dimming, comprising:
a source;
an adaptive M-PAM modulator, connected to the source, wherein the adaptive M-PAM modulator separately modulates a signal transmitted by the source into a first electrical signal and a second electrical signal;
a visible light emitter, connected to the adaptive M-PAM modulator, wherein the visible light emitter converts the second electrical signal into visible light;
an infrared light emitter, connected to the adaptive M-PAM modulator, wherein the infrared light emitter converts the first electrical signal into infrared light; and
a dual-path pulse generator, alternately generating a first pulse control signal and a second pulse control signal, wherein the first pulse control signal and the second pulse control signal are both periodic signals, the first pulse control signal is connected to the visible light emitter to control the visible light emitter to operate, and the second pulse control signal is connected to the infrared light emitter to control the infrared light emitter to operate, wherein
when a remaining operating duration of a high level of the first pulse control signal is equal to a time of a rising edge of the second pulse control signal, the second pulse control signal starts to be generated, and
when a remaining operating duration of a high level of the second pulse control signal is equal to a time of a rising edge of the first pulse control signal, the first pulse control signal starts to be generated.