The working principle of LCD TV universal remote control is as follows: 1. Transmitter: The transmitter part of the remote control sends out infrared light signals through the infrared transmitter. These infrared light signals are wireless signals with specific codes to convey remote control instructions. 2. Remote control command code: When the button on the remote control is pressed, the remote control will generate a specific remote control command code. These codes correspond to the functions on each button and are unique. 3. Transmission: Infrared signals are transmitted in rapid pulses or continuous waveforms. These signals travel through the air and travel some distance before reaching the TV's infrared receiver. 4. Receiver: The TV has a built-in infrared receiver, which can receive the infrared signal emitted from the remote control. 5. Decoder: The decoder inside the TV will interpret the received infrared signal and convert it into recognizable instructions. 6. Execution: Once the decoder parses the commands from the remote control, the TV will execute the corresponding functions, such as adjusting the volume, changing channels, turning on/off the power, etc. Generally speaking, the working principle of the LCD TV universal remote control is realized through the transmission, reception and decoding of infrared signals. When the user presses the button on the remote control, the transmitter will emit an infrared signal. After the infrared receiver of the TV receives the signal, the decoder decodes it into an executable command, and finally the TV performs the corresponding function according to the command. The advantages of LCD TV universal remote control are as follows: 1. Versatility: The LCD TV universal remote control can control multiple TVs of different brands and models. This means you don't need to buy a remote for each TV, just one universal remote that can control all of them. 2. Ease of use: Universal remotes usually have a simple and easy-to-understand button layout and interface design, making them easy to use. With intuitive signs and symbols, users can easily find the desired function button. 3. Portable: Since the universal remote is only a small device, it can easily fit in your pocket or bag for easy portability. That way, no matter where you are, as long as you have a TV, you can use the universal remote to control your TV. 4. Strong compatibility: Universal remotes usually have wide compatibility and can be paired with various TV brands and models. That means no matter what brand of TV you have, the universal remote will work with it. 5. Programmability: Some universal remotes have a programmable feature that allows users to customize or add specific function buttons. This way, you can keep frequently used functions in one easy-to-access location according to your personal preference. To sum up, the universal remote control for LCD TV has the advantages of multi-function, easy to use, easy to carry, strong compatibility and programmability. It's ideal for controlling televisions, especially in those home or office environments with multiple televisions.