What is COB? / What is COB screen? / What is COB LED screen?

What is COB? Why is COB display technology the advantage and trend of LUXMAGE?

In the LED display field, each technological breakthrough brings a great upgrade in display effect, user experience and application scope. From the original DIP, SMD technologies to the COB packaging technology that is currently receiving strong attention, the display industry is entering an unprecedented revolution.

 

COB (Chip on Board) – also known as “chip on board packaging” – is a new generation of LED packaging technology, in which the LED chip is mounted directly on the PCB in a flip-chip style, eliminating intermediate components such as packaging frames or solder wires in traditional SMD. As a result, the display screen achieves a breakthrough in contrast, durability, energy efficiency and protection. COB is not only a technological step forward but also a seamless alternative to traditional SMD modules.

You can learn more about this technology on Wikipedia – Chip on Board , one of the most popular technology resources today.

LUXMAGE , with the orientation of being a pioneer brand in high-end commercial LED displays, has deployed COB technology since its inception and has successfully integrated it into many LED display product lines with super small pixels (small pitch). Today, we not only master COB display technology but also turn it into one of the core competencies that make up the brand's competitiveness.

COB technology has been applied by LUXMAGE to many indoor LED screen product lines, especially products with super small pixels.

See product details at Luxmage Indoor LED Screen .

So, what makes COB technology superior? Why is COB considered the mainstream trend of the future display industry? Let's explore the 9 core advantages of COB displays:

9 Outstanding Advantages of COB LED Screen

1. Contrast ratio up to 20,000:1 – clear, vivid, sharp images

Compared to traditional SMD displays with a contrast ratio of around 5,000:1, COB displays can easily reach 20,000:1 , which is 6–7 times higher . This results in deeper blacks, purer whites, and rich, sharp image details – perfect for high-quality commercials or conferences.

Especially in environments with complex lighting such as stores, showrooms, and shopping malls, high contrast helps avoid the screen being “pale” or “gray”, thereby improving the ability to attract attention and transmission efficiency.

Thanks to its contrast advantage, COB screens are especially suitable for commercial spaces such as showrooms or high-end stores.

Learn more about the First COB-8K Large LED Screen in Vietnam to better understand brightness.

2. Uniform color, reproducing 97% of DCI-P3 wide color gamut

With chip-level uniformity control and high-precision packaging technology, COB has superior color uniformity compared to SMD, while achieving up to 97% DCI-P3 color gamut coverage . As a result, the displayed images are vivid, realistic and rich in depth.

Whether you're showcasing corporate videos, digital art, or high-end products, COB delivers true-to-life images – literally “what you see is what you get.”

 

3. Professional anti-glare technology – no eye strain

LUXMAGE COB display uses professional anti-glare coating, which reduces ambient light reflection, limits bright spots and glare. Even when used in high-brightness environments, users do not suffer from eye fatigue, maintaining a comfortable feeling for long-term viewing.

Very suitable for spaces such as: banks, meeting rooms, real estate centers - places that need to monitor content continuously for long periods of time.

 See more: LUXMAGE's professional meeting room LED screen solution

4. Comprehensive protection design – waterproof, shockproof, easy to clean

Combining new optical materials with advanced protection technology, LUXMAGE creates a display structure with superior protection:

• Water & dust resistant: IP54
• Surface hardness: 4H, good scratch resistance
• The surface can be cleaned directly with water , without worrying about moisture or stains.
• Moisture-proof, anti-static, impact-proof, anti-oxidation – prolongs equipment life

 

Thanks to that, COB screens can operate stably in more diverse and demanding environments, from indoors to outdoors, displays, interactions...

Thanks to its sturdy structure and outstanding resistance, LUXMAGE COB screens have been installed in many real-world spaces.

See practical applications in showroom projects, corporate offices , meeting rooms - conferences , shopping centers .

5. Low temperature – superior energy saving

Compared with traditional SMD which is prone to overheating and high power consumption, COB has a more compact packaging structure and more effective heat dissipation:

• White balance operating temperature does not exceed 45°C, avoid overheating
• Maximum power consumption in white balance state is only 360W/m², outstanding savings

This is an environmentally friendly solution that helps reduce operating costs and ensures long-term stable use.

 

6. Flip-chip – reverse chip, good heat dissipation, long lasting

COB uses flip-chips mounted directly onto the PCB, completely eliminating the gold wire in SMD. Thanks to that:

• More efficient heat dissipation with short paths
• Reduce the risk of defects at the weld point

During long-term operation, COB shows high durability and reliability, with almost no lamp drop or point failure.

7. Extremely low dead pixel rate – minimizes maintenance costs

Thanks to its stable packaging structure and high impact resistance, COB has a very low failure probability:

• Dead light rate only 5PPM (5 errors/1 million pixels)
• While the average SMD is 200PPM

This reduces after-sales costs, especially useful for large-scale display systems or high-end requirements.

 

8. 170° super wide viewing angle – no color shift, no light loss

COB screens have a viewing angle of up to 170° , ensuring no color shift or brightness loss even when the viewer stands at an angle. Especially suitable for conference, exhibition, and display spaces - where many people can observe from different positions.

Compared to SMD which is prone to “graying” when viewed from an angle, COB is superior in visual experience.

 

9. Brightness up to 1000NIT – adapts to all lighting environments

With a brightness of up to 1000NIT , the LUXMAGE COB screen still displays clearly even in strong light conditions such as:

• Fashion store
• Brand display cabinet
• Bright reception hall

It is the ideal choice for commercial environments that require outstanding visibility and powerful communication.

• In addition to COB technology, LUXMAGE is also a pioneer in new display trends such as invisible LED screens, bringing a breakthrough experience in aesthetics and communication efficiency.

Learn more at Invisible LED Display – Display Trend 2024 .

COB – SMD Alternative and LUXMAGE's Competitive Advantage

COB is not only a technological evolution – but also the inevitable direction of the LED display industry. In every aspect from performance, process, energy saving, durability to maintenance costs – COB is leading , and can completely replace SMD seamlessly in high-end display applications.

If you are confused between the two most popular LED technologies today, COB and SMD, check out this detailed analysis article to understand the advantages and disadvantages of each type:

Difference Between COB LED and SMD LED – Which is the Right Choice?

Some COB LED Display Projects

LUXMAGE – Leading the trend in high-end commercial COB displays

LUXMAGE – a brand specializing in high-end commercial displays – is taking COB as the core driving force to develop high-quality, stable and competitive products. We are not only a pioneer in technology deployment, but also strive to widely apply it in the following industries: finance, exhibition, real estate, retail, conference...

In the future, when mentioning "COB display", customers will immediately think of - LUXMAGE.

If you are looking for an LED display solution with sharp images, superior protection, true colors and stable operation – COB is the answer, and LUXMAGE is the choice.

Visit www.luxmage.com to discover more COB LED display lines suitable for your business.

Contact us at:

LUXMAGE - Vi Luc Technology Company Limited

Address: 63 Lo Lu, Truong Thanh, Thu Duc, HCMC

Hotline: 0988.895.066 - 093.333

Email: sale@luxmage.com