The LEDs used to transmit LiFi signals are modulated at such a fast rate that the eye cannot perceive any “flicker”. This is similar to the way our eyes do not perceive the transition between frames in a movie. For comparison purposes, the lowest frequency at which LiFi devices are modulated is 1 MHz, which is 10,000 times higher than the refresh rate of our computer monitors.
LiFi can work in daylight and even in direct sunlight conditions. The LiFi signal can always be detected. It relies on detecting the modulation of the LEDs, not the natural variations and disturbances of the sun. Our technology is modulated at very high frequencies, and sunlight is a constant light, so it can be filtered by the receiver.
Yes, masking the receiver could affect its ability to pick up signals. Completely masking the receiver will prevent it from picking up any signals (e.g., a sheet of paper over the receiver).
Yes, LiFi is much more secure than other wireless technologies because it’s possible to define its transmission area, unlike WiFi. By its nature, to access the LiFi network, the user needs to be in the equipped area and to have a dedicated receiver. In addition, PhotonFi has developed the LiFiMAXController which allows its network to be managed and security to be increased via the encryption and the authentication of its information system.
Yes, LiFi is a two-way wireless communication technology that enables high-speed data transmission in both uplink and downlink.
The threshold of flicker that can be perceived by the human eye is 60 Hz. When light is modulated at frequencies higher than 60 Hz, it is impossible for us to perceive. LiFi systems use LEDs as a transmission medium because they are a semiconductor, which gives them the ability to modulate light at extremely high speeds. These speeds are unattainable with incandescent and fluorescent bulbs. In addition, LEDs are generally considered to be a more efficient light source because they emit in specific wavelengths, so they don’t waste energy.
LiFi is not intended to replace WiFi, but should be considered as an alternative in certain areas where the use of WiFi (or radio frequency waves) is prohibited, undesirable or inefficient. Our technology can also be used to improve connections in areas where high-speed connectivity is needed.