The infrared transmitter is mainly composed of three parts: the remote control special integrated circuit, the instruction keyboard, and the infrared transmission circuit. The control of the remote control launching process, the management of the scanning status of the instructing keyboard and the display of these processes are mainly completed by the remote control dedicated integrated circuit. When the instruction button is pressed, the transmitter inside the remote controller generates coded pulses. These signals enter the modulation circuit and are modulated into 38kHz after the modulation circuit to output. Finally, the driving circuit drives the transmitting device to output infrared signals.