Light communication system, transmitter and receiver

A transmitter, which proceeds light communication with an external receiver, the transmitter comprising:

• a processing unit that generates transmission signals;
• at least two light-emitting diodes arranged in a first column that emit light that carries the transmission signals;
• and
• at least two variable lenses arranged in a second column that correspond to the at least two light-emitting diodes in the first column to receive the light emitted by the at least two light-emitting diodes, and change a propagation path of the light, wherein at least two photosensitive elements of the receiver arranged in a third column correspond to the at least two variable lenses in the second column to receive the light passing through the at least two variable lenses so as to produce receiving signals, the processing unit produces control signals based on a feedback signal produced by the receiver, and uses the control signals produced based on the feedback signal to control the at least two variable lenses accordingly, which change the propagation paths of the light and equivalent channels between the transmission signals of the processing unit and the receiving signals of the receiver.

A receiver, which proceeds light communication with an external transmitter, the receiver comprising:

• at least two variable lenses that have adjustable curvatures, thicknesses or refractive indexes, wherein at least two light-emitting diodes of the transmitter are arranged in a first column, the at least two variable lenses are arranged in a second column correspond to the at least two light-emitting diodes in the first column and change propagation paths of light emitted by the at least two light-emitting diodes, the light carries a transmission signal produced by the at least two light-emitting diodes;
• at least two photosensitive elements arranged in a third column that correspond to the at least two variable lenses in the second column to sense the light passing through the at least two variable lenses and generate receiving signals;
• and
• a processing unit that generates control signals based on signal qualities of the receiving signals and uses the control signals to control the curvatures, thicknesses or refractive indexes of the at least two variable lenses accordingly, which changes the propagation paths of the light and equivalent channels between the transmission signals of the transmitter and the receiving signal of the at least two photosensitive elements.