Light-emitting diode all the potential mechanisms that can induce failures in LEDs. The most common symptom of LED (and diode laser) failure is the gradual lowering of light output and loss of efficiency. Sudden failures, although rare, can also occur. Early red LEDs were notable for their short service life. With the development of high-power LEDs, the devices are subjected to higher junction temperatures and higher current densities than traditional devices. This causes stress on the material and may cause early light-output degradation. To quantify useful lifetime in a standardized manner, some suggest using L70 or L50, which are runtimes (typically in
LED to LED Communication EP1788509A1, GB2376115A1, WO2011007380A1, and by patents pending. LED to LED Communication LED (Light-emitting diode) to LED communication, also known as “Mobile Device Light Communications” are sundry techniques which repurpose mobile computer devices, including mobile telephones, to communicate with other devices, using visual or infrared light. “Mobile device light communication” differs from Visual Light Communication as “mobile device light communication” transmits data at speeds thousands of times slower than Li-fi. “Mobile Device Light Communication” takes various forms: A color sensor, or an ambient light sensor, or a reverse biased LED can receive flashes from the mobile device, and send flashes back