How to evaluate and select a High quality LED display?

The Giant full color LED display is currently widely used in both indoor and outdoor advertising, media-center, stage, TV station, sports events, landscape lighting and another fields. But the quality of these LED displays are not always so good, sometimes are badly. Therefore, how to evaluate and select the most suitable cost-effective LED display is particularly important. We are just discussing about how to select and evaluate a LED display here.

First, select the appropriate pixel Pitch according to view distance of viewer, so as to bring the maximum cost-effective of activities. According to experience, the relationship between Pitch and view distance has the following relationship, the minimum view distance is calculate by the following formula: Pitch*(700-1000), it is depend on the LEDs package size；The maximum view distance of the LED Display: Height*30. If the height is 3m that mean the maximum view distance is 90m. According to these experience Data, LED Display size & resolution of led display, then you can confirm the Pitch of LED display.

Second, refresh rate and grey level. LED display installed for stage or TV Station generally is working together with professional camera and other professional equipment, and those equipment have especially higher requirement of refresh rate and grey level. The refresh rate of the screen installed in these places must be more than 1500HZ. And the gray level and refresh rate of most of the current LED display control system is negative correlation. To improve the refresh rate means that you have to sacrifice the grey level. So you must balance the refresh rate and gray level data setup.

Another point must be mentioned is that the indoor HD LED display require the LED display even working in low-brightness, gray level of the LED Display still keep in normal. The good news is that the latest Driver IC in this function is available now.

Third, uniformity and contrast ratio. Uniformity here includes color uniformity and brightness uniformity. How to evaluate the uniformity? We can test in the LED control software, through the red, green, blue and white test. The best way to ensure uniformity of the LED Display is to ensure uniformity of the LED display from raw material supplier and batch of LED. To ensure the contrast the ratio of the led display, the good quality front mask of led display is a key factor.

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Fourth, LED display stability requirements. Whether indoor or outdoor LED display, the stability of led display is always first thing to consideration. That mean we must have some special design and process of the led display, such as power hot backup, signal hot backup and some other processing.

Fifth, safety, including electrical and structural safety. The use of professional power distribution feed and short circuit protection is the basic requirement. Safety also includes anti-fire and anti-moisture requirements.

Sixth, intelligent, energy saving. Intelligent brightness adjustment, to maximize cost-effectiveness and return on investment, it requires energy-saving, and can adapt the brightness of the led display to the environment. Another aspect of intelligent is that mean the intelligent control, detect and remote switch LED display.

Seventh, maintenance and upgrade. The rental LED display require in particular quickly assemble and dis-assemble, fast maintenance. Of course, a good LED display should also consider customer upgrading requirements.

Eighth, EMC and anti- interference capability. Good LED display should have good EMC standards and anti- interference capability.

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