COB LED
- Updated:
- By: Kevin van Mierlo
Contents
What is cob LED?
Definition
COB stands for Chip-on-Board. Instead of using individual LED chips, multiple LED chips are placed directly on a circuit board. This configuration provides a powerful, uniform light output with high light output and efficiency.
How does COB LED work?
Previously, low-power LEDs and high-power LEDs were widely used. This ensured that the various light points were clearly visible; these light points create the light image when the LED strip is switched on. You can read more about this under the term ‘light image’. This changed a few years ago with the launch of the first LED spotlights. The LEDs are round in shape and positioned close together. This makes it possible to create an even, soft light. The technology has since been improved through the use of even smaller LEDs and advances in reflection technology.
Advantages of COB LED operation
- Energy efficiency: Because several chips are placed on a single surface, more light can be generated with less current. Moreover, COB LEDs make LEDs very energy-efficient.
- High Light Output: The closely spaced chips generate a concentrated light source with high lumen, ideal for powerful lighting needs such as in vehicles.
- Uniformity: Since there is only one light point, the light is distributed more evenly, ensuring uniform light emission without many shadows or hotspots.
- Heat management: The joint structure of COB LEDs enables better heat management, which extends the life of the light source.
Applications in vehicle lighting
In vehicle lighting, COB LEDs are ideal for headlights, rear lights, interior lighting and more. Their high light output and energy efficiency make them an excellent choice for situations where both reliability and performance are crucial.
Different wavelengths of COB LEDs
| Wavelength (nm) | Colour | Applications |
| 10-400 | Ultraviolet (UV) | Disinfection, validation of banknotes, medical applications |
| 400-450 | Violet | |
| 450-495 | Blue | Decorative lighting, aquarium lighting, medical applications |
| 495-570 | Green | Traffic lights, displays |
| 570-590 | Yellow | Signal indicators, vehicle lighting |
| 590-620 | Orange | Indicators, warning signs |
| 620-750 | Red | Stop lights, brake lights, heating applications |
| Above 750 | Infrared (IR) | Security cameras, remote controls, sensors |
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Author
Kevin van Mierlo
Lighting expert at TRALERT® - Kevin tests lighting and finds out everything about legislation. He can tell you all about it.
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