Apparatus, system and method for wireless data transmission by using display backlight

An apparatus for receiving wireless data by using a display backlight, comprising:

• an optical probe configured to receive a sequence of light and dark signals transmitted with the display backlight and optically-electrically convert the sequence of light and dark signals to generate a sequence of switching pulse signals;
• a main control unit;
• a digital decoding unit configured to demodulate the sequence of switching pulse signals with a predetermined signal demodulation method under the control of the main control unit to generate recovered data;
• and
• a digital processing and displaying unit configured to process the recovered data under the control of the main control unit.

An optical recording pen for recording power consumption numerical readings of an electricity meter, comprising:

• an optical probe, disposed at a head position of the optical recording pen, configured to read a sequence of light and dark signals transmitted with a display backlight in the electricity meter and optically-electrically convert the sequence of light and dark signals so as to generate a sequence of switching pulse signals;
• a main control unit (MCU) configured to demodulate and further process the sequence of switching pulse signals to obtain power consumption numerical readings of the electricity meter and an identifier of the electricity meter;
• and
• a recording pen display, located at a tail of the optical recording pen, configured to display the obtained power consumption numerical readings of the electricity meter.