How to choose a full-color LED display
China has the world's largest LED display population and makes great industry breakthroughs these years, many indicators have reached the world's top level, even surpass those in US for some respects. Full-color LED display comes with high-tech system integration, which is a new type of electronic media, and it has got more and more applications in many areas. What makes such products outstanding: high brightness and environmental adaptability, they are usually used in showcases of pictures and videos from outdoor or indoor, such as advertising media, stage scenery, building decoration, traffic information, sports venues and so on.
How to choose a special LED full-color display for you? The LED part is a key component like the CPU, which determines 50% of whole display’s quality. Without a good LED, all other parts cannot make up this defect anyway.
Below are some important tech parameters about LED component you should understand:
1. Colors’ Failure Rate
A full-color LED screen works with thousands of red/green/blue pixels, and any color failure can affect visual result in application. In general, its failure rate should be no higher than 0.03% in 72-hours-ageing from the factory (Not refer to the effects outside of itself), otherwise that will cause blurred showing-images.
A full-color LED screen works with thousands of red/green/blue pixels, and any color failure can affect visual result in application. In general, its failure rate should be no higher than 0.03% in 72-hours-ageing from the factory (Not refer to the effects outside of itself), otherwise that will cause blurred showing-images.
2. Antistatic Ability
LED is a semiconductor device that is sensitive to the static electricity, so electrostatic effects can easily cause its modules' failure. Antistatic ability is plays a great role for LED display quality and its lifetime. In human-body-electrostatic-test, the display’s voltage failure should not be less than 2000V.
LED is a semiconductor device that is sensitive to the static electricity, so electrostatic effects can easily cause its modules' failure. Antistatic ability is plays a great role for LED display quality and its lifetime. In human-body-electrostatic-test, the display’s voltage failure should not be less than 2000V.
3. Attenuation Characteristic
As working hours increasing, the brightness degradation of LED display will gradually turn up. The quality of LED chips, auxiliary materials and package technologies always determine its attenuation speed. Generally, after working for 1000 hours with a current of 20 mA at room temperature, the attenuation rate should be less than 10% for red LEDs and 15% for green/blue ones. The consistency of red/green/blue makes great influence for the future working of LED display’s white balance, and then also affect the output images' fidelity.
As working hours increasing, the brightness degradation of LED display will gradually turn up. The quality of LED chips, auxiliary materials and package technologies always determine its attenuation speed. Generally, after working for 1000 hours with a current of 20 mA at room temperature, the attenuation rate should be less than 10% for red LEDs and 15% for green/blue ones. The consistency of red/green/blue makes great influence for the future working of LED display’s white balance, and then also affect the output images' fidelity.
4. Brightness
The LED lighting power is one of the important determinants of its corresponding display brightness. The higher LED brightness is, the more allowance of operating current, that’s good for power-saving and long-term stability. The brightness value is related to effective angle of the LED display, for example, the smaller viewing angle the higher brightness, and vice versa. In your choice for a suitable LED display, it’s very important for finding a the right balance of angle, brightness and price.
The LED lighting power is one of the important determinants of its corresponding display brightness. The higher LED brightness is, the more allowance of operating current, that’s good for power-saving and long-term stability. The brightness value is related to effective angle of the LED display, for example, the smaller viewing angle the higher brightness, and vice versa. In your choice for a suitable LED display, it’s very important for finding a the right balance of angle, brightness and price.
5. Lighting Consistency
a) Full-color LED display is made up of thousands of red, green and blue pixels, all of them determine the consistency of brightness, white balance consistency and color uniformity. LED manufacturers always require their vendor for 5 nm wavelength range and 1:1.3 brightness range, these indicators can be achieved by testing devices. By the way the consistency of the voltage is generally not a requirement.
b) Not only the LEDs, but also the full color display has directional Angle, which means its luminance will be changed from different angles. Red/green/blue three colors LED Angle consistency will seriously affect the consistency of different angles white balance, and directly affect image fidelity of the LED display. The consistency of LED angle can be measured by synthetical test instrument, and it is particularly important for medium and top grade LED displays.
a) Full-color LED display is made up of thousands of red, green and blue pixels, all of them determine the consistency of brightness, white balance consistency and color uniformity. LED manufacturers always require their vendor for 5 nm wavelength range and 1:1.3 brightness range, these indicators can be achieved by testing devices. By the way the consistency of the voltage is generally not a requirement.
b) Not only the LEDs, but also the full color display has directional Angle, which means its luminance will be changed from different angles. Red/green/blue three colors LED Angle consistency will seriously affect the consistency of different angles white balance, and directly affect image fidelity of the LED display. The consistency of LED angle can be measured by synthetical test instrument, and it is particularly important for medium and top grade LED displays.
All above are key parameters for choosing a good full-color LED display, additionally some other factors in the practical application is also very important, such as thermal design, waterproof feature, false welding rate and more. Before determining the most suitable LED display for you, please feel free to ask any questions directly to me.
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