What is the common use of infrared LEDs?
Infrared light emitting diode (LED) is not used to light up the screen and monitors the way other LEDs are; Instead, it is often used for non -dual applications and night lighting. The application of infrared LED depends on its nanometers (Nm) or wavelength, while common use is between 808nm and 940 nm. Infrared LED devices are used in everyday life in television controls and automated card readers. The use of infrared LEDs can be divided into two types: direct and reflective and the way in which the infrared LED and the receiving diode interact, determines the use of LED.
At the lower end of the infrared frequency, 808nm, infrared LEDs are commonly used in non-visual applications. Lasers and medical lasers and equipment work with this infrared frequency. Infrared lighting is also possible, allowing safety cameras to work at night without light, although the image that captures is usually low resolution. At 830 nm, this infrared withBranch uses for automated card readers in the metro and hotels. These LEDs are used in waterproof cameras and in day and night security cameras in shops and intersections. Normal application on this wavelength is usually observed in quiet alarm systems and doors.
The highest infrared LED signal, 940nm, is the one that consumers most often use. This is LED responsible for the functionality of long -distance controls, including those used with TV players and digital video disks (DVDs). This list also includes wireless game controls. Any device that uses remote control with infrared technology uses this LED signal.
In order to get infrared to work, one of the two control methods must be used. Direct light has emitting LEDs in a control device and receiving diode in the receiving device and emittingThe eating may not point directly to the receiving device. This method is a modern method; It is more convenient to use because the user does not have to direct the controller directly to the device.
The older method, reflecting light, has both diodes present in the controller. With this type of controller, the driver driver must exactly on the device to work or not catch the infrared reflection. Although it is not so comfortable, it allows for a longer functional distance between devices.