Understanding CoB LEDs

What are CoB LEDs?

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A CoB LED (or chip-on-board LED) is a single device with many LED chips mounted on a thermally efficient substrate placed below a uniform phosphor coating.

Anyone who walks through a store or home with recessed or track lighting likely experiences light from a chip-on-board LED (CoB). CoBs are widely used because they emit a bright white light output from a compact light source and are very efficient in a broad range of applications.

So what is a CoB LED, and how is it different from other types of LEDs?

CoB (chip-on-board) refers to the way in which the LED unit is constructed. The basic elements of white CoB LEDs are:

• An electrical power supply to provide the energy to drive the LED
• The light-emitting chip or &#;die&#;. This is sometimes referred to as the blue light pump, and is made of a semiconductor material, indium gallium nitride (InGaN), which emits blue photons when energized
• A phosphor coating which converts the blue light to white. The chemical composition of the phosphor is controlled to produce light of a specific color temperature

CoB LED: Space-Saving Array of Multiple LED Chips

A CoB LED is a single device with many LED chips mounted on a thermally efficient substrate, or board. Each chip is a bare die &#; that is, the chip does not have its own leadframe, phosphor coating or lens. This means that the chips can be mounted extremely closely together on the substrate. The close placement of the LED chips allows for high intensity or light density to be emitted from a smaller area than is possible with single packaged LEDs. The CoB LED manufacturer then applies a uniform phosphor coating to the entire array of chips to convert the blue light to the required white color temperature.

Advantages of a CoB LED

A single CoB LED can contain hundreds of chips forming a dense array. This dense array enables a CoB LED to produce more light output from a smaller area than is generally possible with an array of packaged LEDs.

Using a single LED can result in simpler design and product as well as providing optical advantages for uniform light and efficient optics.

Electrical design is simpler because the CoB LED only requires a single two-wire power supply to the entire array of chips. The positive and negative terminals on a CoB LED are clearly visible in the picture of LUXEON CoB Core Range products above. By contrast, an array of packaged LEDs requires dedicated power supply traces to be routed on the PCB to each LED unit.

Production is simpler because the number of units to be soldered to the board will be lower if a CoB LED is used instead of an array of packaged LEDs.

Optically, a broad range of optics, usually reflectors, can be used with CoBs of different sizes to determine the direction and width of the beam such as with a spot or flood lamp.

Finally, a CoB LED&#;s color is potentially more consistent because a single phosphor coating is applied to the entire array of chips, whereas in an array of packaged LEDs, each LED unit has its own phosphor coating.

An example of CoB LEDs of various sizes is shown below.

CoB LEDs from Lumileds

Lumileds supplies a comprehensive range of CoB LEDs for general lighting, as well as CoB LED products optimized for retail and hospitality lighting. More information can be found at lumileds.com/products/cob-leds/.

In recent years, lighting technology has undergone significant advancements, and one such innovation is the introduction of High Color Rendering Index (CRI) Chip on Board (COB) LEDs. These cutting-edge lighting solutions offer a myriad of benefits over traditional lighting options, making them a popular choice for various applications.

The company is the world’s best High CRI COB LED Chip supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

What are High CRI COB LEDs?

High CRI COB LEDs are lighting devices that combine Chip on Board technology with a high Color Rendering Index. CRI is a measure of how accurately a light source illuminates objects' colors compared to natural light. By using High CRI COB LEDs, you can enjoy superior color accuracy and clarity in your lighting setups.

Benefits of High CRI COB LEDs

1. Exceptional Color Accuracy

One of the significant advantages of utilizing High CRI COB LEDs is their ability to render colors with exceptional accuracy. These LEDs provide a CRI value of 90 or higher, ensuring that the colors in your space appear vivid and true to life. Whether you're in a retail environment showcasing products or in a gallery exhibiting artwork, High CRI COB LEDs can enhance the visual experience by accurately representing the colors as intended.

2. Enhanced Visibility and Visual Comfort

Certain professions demand optimal visual clarity, such as hospitals, factories, and laboratories. High CRI COB LEDs produce a high-quality light that enhances visibility, reducing eyestrain and fatigue. With improved visual comfort, individuals can work efficiently, increasing productivity levels and overall satisfaction in their environment.

3. Energy Efficiency and Cost Savings

High CRI COB LEDs boast remarkable energy efficiency, making them an eco-friendly lighting solution with reduced energy consumption. These LEDs produce more light output per watt compared to traditional lighting options, leading to significant energy savings. By switching to High CRI COB LEDs, you not only contribute to a greener environment but also enjoy long-term cost savings on your electricity bills.

4. Longer Lifespan

Another benefit of using High CRI COB LEDs is their extended lifespan. These LEDs are built to last and can operate for up to 50,000 hours or more, depending on usage conditions. With their prolonged lifespan, you'll experience fewer replacements and maintenance costs, making High CRI COB LEDs a cost-effective lighting solution in the long run.

5. Versatility and Flexibility

High CRI COB LEDs are available in a wide range of configurations, making them suitable for various applications. From residential lighting to commercial installations, these LEDs can cater to your specific needs. Additionally, they come in different color temperatures (warm, neutral, cool), allowing you to choose the perfect lighting ambiance for any space or mood.

6. Dimming Capabilities

Many High CRI COB LEDs come equipped with dimming capabilities, enabling you to adjust the brightness according to your preferences or requirements. This versatility allows you to create the desired atmosphere in different settings, whether it's cozy and intimate or bright and vibrant. Dimmable High CRI COB LEDs provide full control over your lighting, enhancing the overall experience in any application.

Conclusion

High CRI COB LEDs offer numerous advantages over conventional lighting options. From superior color accuracy and enhanced visibility to energy efficiency and dimmability, these advanced lighting solutions can transform any space into a well-lit environment. Embrace the benefits of High CRI COB LEDs and experience the true power of high-quality lighting.

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