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1. How to Calculate the Brightness of Flexible LED display, LED
electronic display screen, LED Video Wall screen
http://ledaliveshow.com
Brightness of LED
The brightness of the LED generally with the Luminous Intensity (Luminous Intensity) to express,
the unit is kandahar CD; 1000 ucd (the kandahar) = 1 MCD (camp focused pull), 1000 MCD = 1 CD.
it is usually 500 ucd-50 MCD for indoor screen, but outdoor ones will reach 100 MCD-1000
MCD, even higher than 1000 MCD .
the best ratio of the three basic color Red, Gree and Blue is 3:6:1 ( the accurate ratio is 3.0:
5.9:1.1), with this ratio, the LED display will show pure white color if the electronic current is the
same.
How to calculate the brightness of the LED display:
there is a formula to calculate the brightness: (Luminous intensity of red + luminous intensity of
gree + luminous intensity of blue) x pixel density / drive model
If the data of the LED display is as below:
Pitch size: 16mm ( 4096 real pixels per square meter)
Scan mode: Static
Luminous Intensity of the LED: Red: 900 mcd, Green:2150 mcd, Blue: 530 mcd, the proportion is
the color is R:G:B=3:6:1, so the useful brightness is Red:900mcd, Green: 1800 mcd, Blue: 300 mcd,
so the total luminous intensity is (900+1800+300)x90%=2700mcd=2.7cd ( normally the design
does not allow full brightness, like the electronic current is 20mA, but when design the electronic
circuit, just allow 18mA, so the brightness is only 90%).
So the brightness of this LED display is 2.7x3906=10546 CD;
If the scan mode is 1/4, so the brightness is 2.7x3906/4=2636CD;
If the scan mode is 1/8, so the brightness is 2.7x3906/8=1318 CD.
If the data of the LED display is as below:
Pitch size: 20mm ( 2500 real pixels per square meter)
Scan mode: 1/8
[attachment=0]LEDMAN SMD 5050 Parameter.jpg[/attachment]
Luminous Intensity of the LED: Red: 750 mcd, Green:1500 mcd, Blue: 300 mcd, the proportion is
the color is R:G:B=3:6:1, so the useful brightness is Red:750mcd, Green: 1500 mcd, Blue: 250 mcd,
so the total luminous intensity is (750+1500+250)=2500mcd=2.5cd
2.5x2500/8=781 CD
the led screen made of SMD 5050 SMD 1/8 scan, if someone tell you that the brightness is more

2. than 1000 CD, so it is trick.
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contact: yuchao622@hotmail.com , all rights reserved, without permission, please do not copy.
mobile led screen portable led curtain flexible led display move led screen flex led curtsin displays
foldable screens LEd moving display.
we are specializing in making flexible LED screen curtain that is flexible, foldable, slim body, light
weight and easy installation, our new patent foldable led screen mainly used for indoor and
outdoor mobile video show and advertisement, it is much suitable for rental for music tour, road
show, event, exhibition and mobile advertisement.
For More Flexible led screen & mobile led dispaly
http://ledaliveshow.com
http://alive-show.com
http://led-display.ledaliveshow.com
http://mobile-led-screen.ledaliveshow.com
http://soft-led-display.ledaliveshow.com
http://led-curtain-screen.ledaliveshow.com
http://flex-dot-screen.ledaliveshow.com
http://foldable-led-screen.ledaliveshow.com
http://youtu.be/oFU49fyCi1g
http://youtu.be/Q9y2Q2YQtuk
http://youtu.be/BPQIJ8XREOc
http://flexible-led-display-screen.blogspot.com
http://www.facebook.com/flexible.LED.curtain
http://softled.wordpress.com
http://www.flickr.com/photos/60913628@N02
https://twitter.com/curtain_display