With the rapid development of technology, the application of infrared LEDs has been widely extended in various fields. Among them, patch infrared LEDs have become a hot topic in the industry due to their compact size, high brightness, and stable performance. This article will introduce the patch infrared LEDs, including their basic principles, types, applications, and future development trends.

Basic Principles of Patch Infrared LEDs

Patch infrared LEDs are a kind of semiconductor light-emitting diode with a small size and high brightness. They are usually composed of a semiconductor material, a p-n junction, and an encapsulation layer. When the forward voltage is applied to the p-n junction, the electrons and holes are recombined, releasing energy in the form of light. The light emitted is in the infrared band, which is not visible to the human eye. The basic principle of patch infrared LEDs is based on the photoelectric effect. When the electrons and holes recombine, the energy difference between the valence band and the conduction band is released in the form of photons. The wavelength of the photons is determined by the energy difference, which is inversely proportional to the wavelength. Therefore, the infrared LEDs emit light in the infrared band.

Types of Patch Infrared LEDs

Patch infrared LEDs can be divided into two types according to their light-emitting wavelength: near-infrared LEDs and far-infrared LEDs. 1. Near-infrared LEDs: The wavelength range of near-infrared LEDs is between 700nm and 1000nm. They are widely used in remote control, optical communication, and other fields. 2. Far-infrared LEDs: The wavelength range of far-infrared LEDs is between 1000nm and 3000nm. They are mainly used in long-distance communication, thermal imaging, and other fields. In addition, according to the different materials and structures, patch infrared LEDs can be divided into several types: 1. GaAs infrared LEDs: GaAs infrared LEDs have high efficiency, good stability, and wide spectral range. They are commonly used in optical communication and remote control fields. 2. InGaN infrared LEDs: InGaN infrared LEDs have excellent brightness and high temperature resistance. They are widely used in automotive lighting, security monitoring, and other fields. 3. SiC infrared LEDs: SiC infrared LEDs have high breakdown voltage, high temperature resistance, and good reliability. They are suitable for high-power, high-temperature, and harsh environment applications.

Applications of Patch Infrared LEDs

Patch infrared LEDs have a wide range of applications due to their small size, high brightness, and stable performance. The main applications include: 1. Remote control: Patch infrared LEDs are widely used in remote control devices such as TVs, air conditioners, and audio equipment. They can transmit signals over a certain distance, making remote control more convenient. 2. Optical communication: Patch infrared LEDs have excellent performance in optical communication systems. They can be used for short-distance and long-distance communication, data transmission, and other applications. 3. Automotive lighting: Patch infrared LEDs have good brightness, high temperature resistance, and long service life. They are widely used in automotive lighting, such as daytime running lights, brake lights, and turn signals. 4. Security monitoring: Patch infrared LEDs can be used for long-distance and night vision security monitoring. They are commonly used in cameras, motion sensors, and other security equipment. 5. Thermal imaging: Patch infrared LEDs have good sensitivity and can be used for thermal imaging applications. They are widely used in industrial inspection, medical diagnosis, and other fields.

Future Development Trends of Patch Infrared LEDs

With the continuous advancement of technology, the patch infrared LED industry is facing the following development trends: 1. High brightness and energy efficiency: As the application requirements become higher, the brightness and energy efficiency of patch infrared LEDs will be further improved. This will reduce the power consumption and heat generation of the devices, making them more suitable for various applications. 2. Miniaturization and integration: The miniaturization and integration of patch infrared LEDs will reduce the size and weight of the devices, making them more convenient for use. At the same time, the integration of multiple functions can improve the performance and reliability of the devices. 3. New materials and structures: The development of new materials and structures will further improve the performance and stability of patch infrared LEDs. For example, the development of GaN-based infrared LEDs has greatly improved the brightness and efficiency of the devices. 4. Intelligent control: With the development of artificial intelligence and Internet of Things technology, patch infrared LEDs will be integrated with sensors, microcontrollers, and other components to realize intelligent control applications. In conclusion, patch infrared LEDs have excellent performance and wide application prospects. As the technology continues to develop, patch infrared LEDs will play a more important role in various fields.