How to calculate white balance

Full color video screen

1.General requirement
— RGB FFP matching well
— RGB VA matching well
— Even colour and brightness distribution
2. The brightness ratio of RGB to achieve white balance
R : G : B = 3 : 6 : 1
3. How to convert the screen brightness into LED lamp brightness?
3.1 Pitch size
The distance between the centres of two pitches.
The most popular pitch size: 10mm, 12mm, 16mm, 20mm, 25mm….
3.2 Screen brightness
1 nit = 1cd/m2
3.3 RGB combination
The most popular combinations are: 1:1:1, 1:2:1, 2:1:1 or 2:2:1
3.4 How to calculate briefly the LED brightness if customer’s screen is 16mm pitch with 5000nit?
— The numbers of pixel in 1m2
Numbers of pixel = 1m2 / (16mm x 16mm x 10-6) = 3906 pcs/ m2
— The brightness of each pixel
Brightness of each pixel = 5000nit / 3906 pcs/ m2= 1.28 cd/pcs
— If the RGB combination is 1:1:1, the IV of RGB will be
Red = 1.28 x 30% x 1000 = 384mcd
Greed = 1.28 x 60% x 1000 = 768mcd
Blue = 1.28 x 10% x 1000 = 128mcd


DOES IT MAKE SENSE ?

ANY QUESTION,PLEASE FEEL FREE TO CONTACT WITH ME.

JAMES CHEN FROM LEDMAN