Quantum Rod/Dot Enhancement Film (QREF/QDEF) has been used in a wide range of display products for color enhancement. In this project, the application quantum rod/dot film in Li-Fi communications systems is investigated. QREF/QDEF fabricated at the State Key Laboratory of Advanced Displays and Optoelectronics Technologies (SKL of ADT) of HKUST would be used in the proposed Li-Fi communication system. Communication parameters and overall performance would then be evaluated.

Currently, research on visible light communication (VLC) focuses on the usage and applications of a wide range of visible light transmitters (LEDs, μLEDs, LCD backlights, laser diodes, etc.) and receivers (Photodiodes, CMOS cameras, etc.). Although there are already comprehensive measurements of the performan...[ Read more ]

Quantum Rod/Dot Enhancement Film (QREF/QDEF) has been used in a wide range of display products for color enhancement. In this project, the application quantum rod/dot film in Li-Fi communications systems is investigated. QREF/QDEF fabricated at the State Key Laboratory of Advanced Displays and Optoelectronics Technologies (SKL of ADT) of HKUST would be used in the proposed Li-Fi communication system. Communication parameters and overall performance would then be evaluated.

Currently, research on visible light communication (VLC) focuses on the usage and applications of a wide range of visible light transmitters (LEDs, μLEDs, LCD backlights, laser diodes, etc.) and receivers (Photodiodes, CMOS cameras, etc.). Although there are already comprehensive measurements of the performance of the currently available systems, the transient response time of the transmitter and receiver themselves are rarely concerned. The ambient environment, setup of the signal processing components and more importantly, the intrinsic properties of the transmitter and receiver themselves contribute to the limitations of transmission distance and bit error rate (BER) of the communication systems. Most of the proposed communications systems that employs light emitting diodes (LEDs) based on phosphors coating as the transmitter, however, implicitly consider the delay induced by the phosphors coating into the overall limitations of the communication systems. In these systems, white wideband LED coated with phosphors is used as the transmitter and a wideband receiver is used as the receiver. This implies that the lifetime (or the fall time) of phosphors coating of the white LED upon on-off key (OOK) switching (in μs scale) contributes to part of the error induced in the proposed communication system. Upon suitable constructions, the VLC performance of blue LCD backlight unit with QREF/QDEF film to produce white light will be compared with that of white phosphorescent backlight.