Infrared emitting LED, as a key component in modern electronic devices and communication systems, is widely used in fields such as remote control, sensing, data transmission, and security monitoring. A deep understanding of the specification parameters of infrared emitting LEDs is crucial for selecting appropriate devices, optimizing system design, and ensuring system performance. This article will provide a detailed explanation of the specifications of infrared emitting LEDs from multiple aspects, including brightness, wavelength, emission angle, electrical performance parameters, and special application requirements.

brightness

Brightness is a key indicator for measuring the luminous intensity of LED, usually measured in lumens (lm). The brightness of infrared emitting LEDs not only determines the intensity of their infrared light emission, but also directly affects the remote control distance, sensing sensitivity, and data transmission rate. Generally speaking, infrared emitting LEDs have a wide brightness range, ranging from a few lumens to several hundred lumens. In conventional applications, such as home appliance remote controls, a brightness of around tens of lumens is sufficient to meet the requirements. In situations where long-distance remote control or high-sensitivity sensing is required, it is necessary to choose infrared emitting LEDs with higher brightness.

It is worth noting that higher brightness is not necessarily better. Excessive brightness may lead to increased energy consumption, increased heat generation, and even affect the lifespan of LEDs. Therefore, when choosing infrared emitting LEDs, the relationship between brightness, energy consumption, and lifespan should be reasonably balanced according to specific application scenarios and requirements.

wavelength

Wavelength is another important parameter of infrared emitting LEDs, which determines the color and penetration ability of infrared light. The wavelength range of infrared light is usually between 760nm and 1500nm, and different wavelengths of infrared light have different characteristics and applications. For example, infrared light with a wavelength of 940nm is widely used in home appliance remote controls due to its good penetration and low cost. Infrared light with longer wavelengths (such as 830nm-880nm) is suitable for security monitoring and nighttime lighting, as they have stronger penetration and longer transmission distances.

When choosing infrared emitting LEDs, the wavelength requirements should be selected according to the application scenario. At the same time, it is also important to pay attention to wavelength consistency, as infrared light with consistent wavelengths can ensure color consistency, thereby improving the stability and reliability of the system.

viewing angle

The luminous angle refers to the range of angles at which light rays diffuse when an LED emits light, usually expressed as the half power angle (the angle at which the light intensity drops to half of its maximum intensity). The emission angle of infrared emitting LEDs has a significant impact on their application performance. A smaller emission angle can make the light more concentrated, suitable for situations that require long-distance transmission or precise pointing. A larger angle of illumination can make the light more dispersed, making it suitable for situations that require extensive coverage or uniform lighting.

When choosing infrared emitting LEDs, the selection should be based on the requirements of the emission angle for the application scenario. At the same time, attention should be paid to the consistency and stability of the emission angle to ensure the performance and reliability of the system.

Electrical performance parameters

The electrical performance parameters of infrared emitting LEDs include forward voltage, forward current, reverse voltage, and reverse current. These parameters determine the working state and performance of the LED.

Forward voltage: refers to the voltage that needs to be applied when the LED is working normally. Different models and specifications of infrared emitting LEDs have different forward voltage requirements. When selecting, it should be matched according to the system's supply voltage and the forward voltage requirements of the LED.
Forward current: refers to the current that flows through an LED during normal operation. The magnitude of forward current directly affects the brightness and heat generation of LED. Excessive forward current can cause LED overheating, shortened lifespan, and even damage. Therefore, when selecting infrared emitting LEDs, a reasonable choice should be made based on the system's current limitations and the LED's current carrying capacity.
Reverse voltage: refers to the maximum voltage that an LED can withstand when connected in reverse. The magnitude of the reverse voltage determines the reverse breakdown capability of the LED. When selecting, it should be ensured that the reverse voltage of the system does not exceed the reverse breakdown voltage of the LED to avoid LED damage.
Reverse current: refers to the current that flows through an LED when connected in reverse. The magnitude of reverse current reflects the reverse leakage performance of LED. When selecting, LEDs with smaller reverse current should be chosen to improve the stability and reliability of the system.

Special application requirements

In addition to the basic specifications mentioned above, infrared emitting LEDs also need to meet specific requirements in certain special application scenarios.

High power applications: In high-power applications such as security monitoring and night lighting, it is necessary to choose infrared emitting LEDs that can withstand high currents and voltages. Meanwhile, attention should also be paid to the heat dissipation performance to ensure the stability and reliability of the LED during high-power operation.
Low power applications: In low-power applications such as portable devices and IoT sensors, it is necessary to choose infrared emitting LEDs with lower power consumption and higher efficiency. This helps to extend the device's battery life and improve the system's energy efficiency.
Waterproof and dustproof applications: Infrared emitting LEDs used outdoors or in harsh environments need to have good waterproof and dustproof performance. This can be achieved by selecting appropriate packaging materials and processes. For example, adopting fully enclosed or semi enclosed packaging structures, as well as using materials and processes with high waterproof and dustproof levels.
High sensitivity sensing applications: In high-sensitivity sensing applications such as infrared ranging and infrared temperature measurement, it is necessary to choose infrared emitting LEDs with fast response speed and high sensitivity. This helps to improve the measurement accuracy and response speed of the system.

In summary, the specifications of infrared emitting LEDs cover multiple aspects such as brightness, wavelength, emission angle, electrical performance parameters, and special application requirements. When choosing infrared emitting LEDs, a reasonable selection should be made based on specific application scenarios and requirements. At the same time, attention should be paid to the accuracy and consistency of parameters to ensure the performance and reliability of the system. With the continuous development of technology, the performance of infrared emitting LEDs will continue to improve, and their application fields will become more extensive. In the future, infrared emitting LEDs will play a more significant role in fields such as smart homes, the Internet of Things, and security monitoring