LED display optional points
1, the ambient brightness for the screen body brightness requirements
General brightness requirements are as follows:
(1) Indoor:> 800CD / M2
(2) semi-indoor:> 2000CD / M2
(3) outdoors (sitting north and south):> 5500CD / M2
(4) outdoors (sitting south):> 8000CD / M2
What is the brightness of red, green and blue in the white composition requirements: red, green, blue contribution in the white fineness is not the same. The underlying cause is due to the human eye retina for different wavelengths of light caused by the different. After a large number of experimental tests to get the following approximate ratio for reference design:
Simple red, green and blue brightness ratio: 3: 6: 1, accurate red, green and blue brightness ratio: 3.0: 5.9: 1.1, in the clear brightness and point density requirements, how to calculate the brightness of a single tube:
The calculation method is as follows: (two red, one green, one blue as an example)
Red LED light brightness: brightness (CD) / M2 ÷ points / M200.3 ÷ 2
Green LED light brightness: brightness (CD) / M2 ÷ points / M2 × 0.6
Blue LED light brightness: brightness (CD) / M2 ÷ points / M2 × 0.1
For example: 2500 points per square meter density, 2R1G1B, brightness requirements per square meter 5000CD / M2, then:
Red LED lights brightness: 5000 ÷ 2500 × 0.3 ÷ 2 = 0.3
Green LED lights brightness: 5000 ÷ 2500 × 0.6 = 1.2
Blue LED light brightness: 5000 ÷ 2500 × 0.1 = 0.2
The brightness of each pixel is: 0.3 × 2 + 1.2 + 0.2 = 2.0CD
2, consider the user site can allow the screen area of the factors
(1) the relationship between the effective line of sight and the actual size of the site;
(2) pixel size and resolution;
(3) the unit is the base area estimation;
(4) screen body mechanical installation and maintenance operation space;
(5) the effect of the angle of the screen body on the distance.
3, the user needs to play the effect
(1) text display: depending on the size of the text and the need for resolution;
(2) ordinary video display: 320 × 240 dot matrix;
(3) digital standard DVD display: ≥ 640 × 480 dot matrix;
(4) complete computer video: ≥ 800 × 600 dot matrix;
