In today’s era of rapid development of digital display technology, COB LED displays have advantages such as excellent picture quality, stability and long life. They have gradually become a popular option in the high-end small-pitch displays application. You may see them in more and more business meetings, commercial displays, home entertainment and other applications.
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However, for LED screen beginners, facing the dazzling array of LED screens on the market, how to choose a right COB LED display? Doitvision will introduce the key points of purchasing COB LED displays.
Consideration points for purchasing COBLED screens:
Clear requirements
Before you choose a COB LED display, you should first clarify its usage scenarios and viewing content. This is one of the key items to avoid blind consumption and choose one that meets actual needs.
Use scenario
Conference room:
Since conference rooms usually require clear and delicate images to display documents, charts and data, you should give priority to more high-resolution COB LED displays. For example: COB screens between P0.9 and P1.5 pixels.
At the same time, the brightness should be moderate, and the range of 500- nits is enough. This brightness range can ensure clear visibility under normal indoor light without being dazzling due to excessive brightness.
Exhibition Hall:
The exhibition hall has rich and diverse display content. You may need to play pictures, videos, physical models, etc. In order to attract the attention of the audience and show the details and characteristics of the exhibits, a below P2 COB display is also essential. In addition, considering that the exhibition hall may have different light intensities, it would be more practical for you to choose a display with adjustable brightness.
Home Theater:
The purpose of the home theater is to obtain an immersive viewing experience. Therefore, you should have high requirements for the fineness and color performance of the picture.
We recommend that you pay attention to
- P1.2 or below pixels
- 800 nits
- High refresh rate above Hz
Focus on key parameters of picture quality
Picture quality is an important indicator to measure the quality of COB LED display screens. You can focus on the following key parameters.
Resolution (pixel pitch)
Pixel pitch refers to the distance between two adjacent pixels. It directly determines the fineness of the picture of the display. The smaller the pixel pitch, the finer the picture and the richer the details that can be presented, but the price will also increase accordingly.
For example, a P0.9 COB LED display screen has a clearer picture than a P1.5 display, but it is also more expensive. To determine the appropriate viewing distance, you can use a simple formula: pixel pitch (mm) × 3 = minimum viewing distance (m).
For example, for a P1.2 screen, the optimal viewing distance is at least 3.6 meters. If the viewing distance is too close, you will see obvious graininess, which will affect the viewing experience.
Brightness
Brightness refers to the intensity of the light emitted by the display screen. The different usage scenarios have different requirements for brightness.
Indoor: Indoor light is relatively weak, and the range of 500- nits is better. For example, in a home theater, a brightness that is too high above nits will make the picture appear too bright and lose the atmosphere of the theater; while a brightness that is too low, less than nits, will cause the picture to be dim and the details to be unclear.
Contrast
Contrast refers to the brightness ratio between the brightest and darkest areas of the display screen. The higher the contrast, the stronger the layering of the picture, the purer the black, and the brighter the white.
Generally speaking, with a contrast ratio of more than :1 COB displays, it can provide better visual effects. Compared with ordinary LED screens, COB screens have the advantage of high contrast, which makes the black scenes deeper and the pictures more vivid.
Inspecting stability and lifespan
In addition to picture quality, you also need to pay special attention to the stability and lifespan of the product. They are directly related to the use cost and long-term performance of the product.
Heat dissipation design
A good COB screen requires good heat dissipation design. You can feel its heat dissipation by touching the back of the sample. If the back of the sample is hot after being turned on for a long time, it means that the heat dissipation design is not good.
Poor heat dissipation of the LED cabinet will cause the internal temperature of the display to rise, accelerate the aging of chips and other components, and thus shorten the service life of the display.
Protection level
Different usage scenarios have different requirements for the protection level of the display. The indoor environment is relatively good, you only need to choose an IP40 protection level display to meet the dustproof requirements;
For the harsh outdoor environment, you should choose an IP65 protection level display to cope with various harsh weather conditions.
Brand chip
The chip is the core component of the COB LED display. Its quality directly affects the stability and life of the display. Well-known brand chips, such as Epistar and Nationstar, usually have higher stability and slower light decay.
COB displays using these brand chips can still meet the brightness requirements after 5 years of use. However, using inferior chips may cause the display to become dark and have large color differences after 1-2 years of use.
Consider installation and maintenance
You also need to consider the LED display convenience of installation and maintenance. It is related to the product’s use cost and the difficulty of later maintenance.
Weight and thickness
Compared with traditional LED displays, COB LED displays have the advantages of light weight and thin thickness. It is 20% lighter than traditional LED screens, which can save more space when installed on the wall, reducing the difficulty and cost of installation. At the same time, the thinner thickness also makes the display more beautiful and suitable for various installation environments.
Contact us to discuss your requirements of COB LED Market. Our experienced sales team can help you identify the options that best suit your needs.
Maintenance cost
COB LED displays have good sealing and almost no dust, so you do not need to clean them frequently. Moreover, because it is a modular assembly, when a single module is damaged, you can quickly replace it, and the repair cost is relatively low.
Some misunderstandings in choosing COB LED screens:
In addition to the above considerations, you also need to pay attention to some common traps to avoid buying products of poor quality.
Don’t just look at the price
Although price is one of the important factors we pay attention to when purchasing products, it cannot be used as the only criterion for selection.
Low-priced COB screens may use inferior chips and other low-quality components. Although the price is low when purchased, various problems may occur during use, such as darkening, large color difference, etc.. It will be greatly shortened service life. Therefore, you need to consider the quality and performance of the COB video wall comprehensively, and don’t be greedy for temporary cheapness.
On-site test
Before purchasing, you can buy a sample for on-site test. By playing a black screen, you can check whether the display has bright spots; by playing a pure color screen, you can observe the uniformity of the color. If you find a problem during the test, you should communicate with the merchant in time to solve it.
Clearly write parameters in the contract
When signing a contract to purchase a COB screen, you must clearly write important parameters such as brightness, contrast, and warranty period into the contract. The warranty period should be at least 1 year. Avoid verbal promises so as not to be unable to protect your legal rights and interests when disputes arise later.
COB LED screen Recommend
In order to help everyone better choose a COB LED display. You can refer to the following recommended solutions for different scenarios:
In addition, if possible, please choose products from big brands, such as Absen, Unilumin, Doitvision etc. Their product quality and after-sales service are highly guaranteed. Although the price may be relatively high, it can make you buy with more confidence and avoid the trouble and loss caused by product quality problems.
Conclusion:
In short, if you are choosing a suitable COB LED display, you need to consider multiple factors. According to our guide, we hope that you can choose a COB LED display with reliable quality and high cost performance. If you need a COB LED display, you can browse our products or contact us at will.
Choosing the best Chip-on-Board (COB) LED involves considering various factors to ensure it meets the specific requirements of your lighting project. Here are the top five tips to help you choose the best COB LED:
1. Lumen Output and Brightness:
Understand Lumens: Lumens measure the total light output of the COB LED. Consider the desired brightness for your application, whether it's for general lighting, accent lighting, or task lighting.
Check Lumen Packages: COB LEDs come in different lumen packages. Select a COB LED with a lumen output that suits your project's illumination needs.
2. Color Rendering Index (CRI) and Color Temperature:
CRI Importance: CRI measures how accurately the COB LED represents colors compared to natural light. Higher CRI values indicate better color accuracy.
Choose Color Temperature: Decide on the color temperature (warm, neutral, or cool) based on the atmosphere you want to create. Common color temperatures range from warm white (around K) to cool white (up to K).
3. Power Consumption and Efficiency:
Wattage and Efficacy: Consider the power consumption of the COB LED, usually measured in watts. Also, look at its efficacy, which indicates how efficiently it converts electrical power into visible light. Higher efficacy values are more energy-efficient.
4. Heat Dissipation and Thermal Management:
Efficient Heat Dissipation: COB LEDs can generate heat, and efficient heat dissipation is crucial for longevity and performance. Choose COB LEDs with effective thermal management features, such as heat sinks or ceramic substrates.
Operating Temperature Range: Ensure the COB LED can operate within the required temperature range for your application.
5. Compatibility and Application-Specific Considerations:
Driver Compatibility: Check if the COB LED is compatible with the drivers or power supplies you plan to use. Ensure the voltage and current requirements match.
Dimmability: If you need dimmable lighting, choose a COB LED that is compatible with the dimming system you intend to implement.
Application-Specific Features: Consider features tailored to specific applications, such as waterproofing for outdoor use or special coatings for harsh environments.
Additional Considerations:
6. Brand Reputation and Quality:
Choose Reputable Brands: Opt for COB LEDs from well-known and reputable manufacturers. Established brands often have a track record of producing reliable products.
7. Customer Reviews and Recommendations:
Read Reviews: Look for customer reviews and testimonials to gain insights into the real-world performance and reliability of the COB LED.
Expert Recommendations: Seek advice from lighting professionals or forums for specific project requirements.
8. Cost-Benefit Analysis:
Balancing Cost and Quality: While cost is a consideration, prioritize quality to ensure longevity and performance. Consider the long-term benefits of investing in a higher-quality COB LED.
By carefully considering these tips, you can make an informed decision when selecting a COB LED for your lighting project. Keep in mind the specific requirements of your application, and don't hesitate to seek advice from experts or consult with suppliers to ensure you choose the best COB LED for your needs.
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