Household Remote Control 40key For Samsung QE55QN90BATXXU/ Galaxy S22 Ultra/ Galaxy Buds Pro
Parameters and principle of infrared emitting tube
Emission distance, emission angle (15 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 180 degrees), emitted light intensity and wavelength of the infrared emitting tube. The above are physical parameters, and it is necessary to understand its electrical performance parameters: 3mm and 5mm are small-power infrared emitting tubes commonly used in the market, 8mm and 10mm are * * rate and high-power emitting tubes. The forward voltage of the low-power emitting tube is 1.1-1.5v, the current is 20mA, the * * rate is the forward voltage: 1.4-1.65v 50-100ma, and the forward voltage of the high-power emitting tube is 1.5-1.9v200-350ma. The 1-10W high-power infrared emitting tube made by Yuxing electronics can be used for infrared monitoring and lighting.
Ordinary infrared emitting tubes are similar in appearance to ordinary visible LEDs, but they emit infrared rays. The tube voltage drop is generally about 1.4V, and the working current is generally less than 20mA. In order to adapt to different operating voltages, the loop is often connected with a finite current resistor. When the infrared ray is emitted to control the corresponding controlled device, the control distance is proportional to the transmission power. In order to increase the control distance of the infrared ray, the infrared light emitting diode works in the pulse state. Because the effective transmission distance of the pulsating light (modulated light) is proportional to the peak current of the pulse, the emission distance of the infrared light can be increased by increasing the peak IP as much as possible. The method to improve IP is to reduce the pulse duty ratio, that is, the width t of the compressed pulse. For some color TV infrared remote controllers, the working pulse duty ratio of the infrared light emitting tube is about 1 / 3-1 / 4; The duty ratio of infrared remote controller for some electrical products is 1 / 10