FAQs


What’s the factors that effect screen size allowed by the user’s field ?
(1) the connection of effective viewing distance and practical field size?
(2) pixel size and resolution
(3)area estimation based on cell
(4)screen mechanical installation and maintenance operation space
(5)infection of screen obliquity to distance
What’s the displaying effects clients needed ?
(1)characters display: depends on its character size and resolution needs
(2)common video display: 320×240 dot matrix
(3)digital standard DVD display: ≥640×480 dot matrix
(4) full computer video ≥800×600 dot matrix
What’s the environmental brightness requirements to the display ?
Common brightness requirements as below:
(1) indoor: >800CD/M2
(2)semi-indoor: >2000CD/M2
(3)outdoor (locate south ,face north) >4000CD/M2
(4)outdoor (locate north ,face south) >8000CD/M2
What’s the brightness requirements of RGB in the white color configuration?
Red, Green, Blue contributes differently in white color quality, the root reason is due to human eyes’ retina. feels different to light that has different wavelength. We got below proportions after mass experiments and inspections for your references:??
Brightness proportion of simple RGB: 3:6:1
Brightness proportion of exact RGB: 3.0:5.9:1.1
Why high level full color display should use pure green tube?
In practical production of LED display, should choose tricolor that has high lighting efficiency and vivid pictures.?
LED lamp, in order to make the area of color triangle as close as possible to color curve in tongue shape in chroma chart in order to meet abundant colors and emit enough brightness, the finial curve in tongue shape is 515nm wavelength light, so, high level LED display choose pure green LED lamp whose wavelength close to 515nm. For example, ?to choose LED lamp which has wavelength 520nm?525nm or 530nm
How to calculate brightness of each lamp under the conditions of definite brightness and pixel density ?
The calculating methods as below: ( for example: 2R,1G, 1B)
Red LED lamp brightness: brightness (CD)/M2÷dots/M2×0.3÷2
Green LED lamp brightness: brightness (CD)/M2÷dots/M2×0.6
Blue LED lamp brightness: brightness (CD)/M2÷dots/M2×0.1
For example: 2500dots/sqm, 2R1G1B, brightness requirement 5000 CD/M2, so:
Red LED lamp brightness: 5000÷2500×0.3÷2=0.3
Green LED lamp brightness: 5000÷2500×0.6÷2=1.2
Blue LED lamp brightness: 5000÷2500×0.1=0.2
Brightness per pixel: 0.3×2+1.2+0.2=2.0 CD
why we choose DVI display connector standard ?
(1)The DVI display connector meets the computer international standard
(2)no need to open cabinet, you can install easily

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