Optoelectronics components, specifically LEDs (Light Emitting Diodes) used in circuit board indicators, arrays, light bars, and bar graphs, are essential for various signaling and display applications. These components are primarily designed to emit light when an electrical current passes through them. Circuit board indicators are small LEDs mounted on circuit boards used to show the operational status of electronic devices. Arrays consist of multiple LEDs configured in a specific pattern to create a uniform light source. Light bars are elongated assemblies of LEDs that provide a continuous strip of light, while bar graphs are a series of LEDs aligned to visually represent quantitative data, such as signal strength or battery level.
Main uses of these LED components include status indication in consumer electronics, automotive dashboards, industrial control panels, and audio-visual equipment. Their characteristics such as low power consumption, long service life, and high reliability make them ideal for these applications. Some of the manufacturers that produce these types of LEDs include Cree, Osram, and Philips.