1, LED Screen length and height calculation
Point spacing × number of points = long/high
Such as: PH16 length = 16 points × 1.6cm = 25.6cm
Height = 8 points × 1.6cm = 12.8cm
PH10 length = 32 points × 1.0cm = 32cm
Height = 16 points × 1.0cm = 16cm;
2, LED Screen point pitch calculation
The distance from the center of each pixel to each adjacent pixel;
Each pixel can be an LED light [eg PH10 (1R)], two LED lights [eg PH16 (2R)] and three led lights [eg PH16 (2R1G1B)]. P16's pitch is :16MM; P20's dot pitch: 20MM; P12's dot pitch: 12MM
3, LED screen module number calculation
Total area ÷ Module length ÷ Module height = Number of modules used
Such as: 10 squares of PH16 outdoor monochrome LED display using the number of modules equal to:
10 square meters ÷0.256 meters ÷0.128 meters=305.17678 ≈ 305
More accurate calculation method: length of use module number × height of use module number = total number of modules used
Such as: 5 meters long, 2 meters high PH16 monochrome led display module number:
Long use module number = 5 meters ÷ 0.256 meters = 19.5325 ≈ 20
High use module number = 2 meters ÷ 0.128 meters = 15.625 ≈ 16
Total number of modules used = 20 x 16 = 320
4, LED screen scanning mode calculation
Scan mode: the ratio of the number of rows lit at the same time to the number of rows in the entire area within a certain display area.
Indoor single and double color is generally 1/16 scan,
Indoor full color is generally 1/8 scan.
Outdoor single color is generally 1/4 scan,
Outdoor full color is generally a static scan.
At present, the LED display screens in the market are static scanning and dynamic scanning. Static scanning is divided into static real pixels and static virtual. Dynamic scanning is also divided into dynamic real images and dynamic virtual; drive devices are generally made in China HC595, Taiwan MBI5026 Toshiba TB62726, Japan, generally has 1/2 sweep, 1/4 sweep, 1/8 sweep, and 1/16 sweep.
Give a description:
A commonly used full-color module pixel is 16*8 (2R1G1B). If MBI5026 is used for driving, the total module used is: 16*8*(2+1+1)=512, MBI5026 is a 16-bit chip, 512/ 16=32
(1) If using 32 MBI5026 chips, it is static virtual
(2) If 16 MBI5026 chips are used, dynamic 1/2 scan virtual
(3) If using 8 MBI5026 chips, it is dynamic 1/4 sweep virtual
If there are two red lights on the board
(4) With 24 MBI5026 chips, static real pixels
(5) Use 12 MBI5026 chips, which are dynamic 1/2 sweep pixels
(6) With 6 MBI5026 chips, dynamic 1/4 sweep pixels
In the LED cell board, scanning methods are 1/16, 1/8, 1/4, 1/2, static. If you distinguish it?
One of the easiest ways is to count the number of LEDs on the cell board and the number of 74HC595.
Calculation method: the number of LEDs divided by the number of 74HC595 divided by 8 = a fraction of the scan
Real pixels correspond to virtual:
In simple terms, the real pixel screen means that each of the three kinds of red, green and blue light emitting diodes constituting the display screen finally participates only in the imaging of one pixel to obtain sufficient brightness. Virtual pixels are the use of software algorithms to control each color of the light-emitting tube eventually participate in the imaging of multiple adjacent pixels, so that the use of fewer light tubes to achieve greater resolution, can display four times the resolution.
5, LED display visual distance calculation
RGB color mixing distance Trichromatic mixing to a single color distance:
LED full-color viewing distance = pixel pitch (mm) × 500/1000
The smallest viewing distance can show the distance of the smooth image:
LED display visible distance = pixel pitch (mm) × 1000/1000
The most suitable viewing distance can be seen by the viewer:
The best viewing distance of LED display
= pixel pitch (mm) × 3000/1000
The farthest viewing distance:
LED display distance of the maximum distance = screen height (m) × 30 (times)
6, LED display power calculation
The power formula is P=UI
P stands for power, U stands for voltage, I stands for current, usually the power supply voltage we use is 5V, the power supply is 30A and 40A; the monochrome is 8 unit boards and 1 40A power supply, the dual color is 6 unit board and 1 power supply; The outdoor screen's power is referenced in the “product parameters” on the website, and the other side is very clear.
The following will give an example
A unit needs to have 9 square meters of indoor 5.0-color electronic screens to calculate how much power is needed. The first to calculate the number of 40A power = 9 (0.244 * 0.488) / 6 = 12.5 = 13 power supply (to integer, in order to large standards) then very simple, maximum power P = 13 only * 40A * 5V = 2600W. Single lamp power = one lamp power 5V*20mA=0.1W
LED display unit board power = single lamp power * resolution (horizontal pixel points * vertical pixel points)/2
The maximum power of the screen = the resolution of the screen * Number of lamps per resolution * 0.1
The average screen power = screen resolution * number of lights per resolution *0.1/2
The actual power of the screen = resolution of the screen * number of lights per resolution * 0.1 / scan number (4 sweep, 2 sweep, 16 sweep, 8 sweep, static)
7, LED display brightness calculation
Brightness: The overall brightness of the screen is integrated by the brightness of a single lamp.
Examples are as follows:
3906 points P16 outdoor full-color 2R1PG1B (1/4 sweep), Dalian Lumei tube core, in which the red tube luminous brightness is 800mcd, the green tube luminous brightness is 2300mcd, the blue tube luminous brightness is 350mcd, which can calculate a square theory The brightness is (800*2+2300+350)*3906/1000/4=4150cd
In the clear brightness and dot density requirements, how computer single tube brightness?
The calculation method is as follows: (take two red, one green, one blue as an example)
Red LED brightness: Brightness (CD)/M2 / points/M2 x 0.3 ÷ 2
Green LED lightness: Brightness (CD)/M2/M2×0.6
Blue LED brightness: Brightness (CD)/M2 //M2×0.1
For example: 2500 dots per square meter, 2R1G1B, 5000 CD/M2 per square meter, then:
The brightness of the red LED is: 5000÷2500×0.3÷2=0.3
The brightness of the green LED is: 5000÷2500×0.6÷2=1.2
The brightness of the blue LED is: 5000÷2500×0.1=0.2
The brightness of each pixel is: 0.3×2+1.2+0.2=2.0 CD
8, LED display power supply number calculation
The power supply is 30A and 40A; the monochrome is a 40A power supply for 8 cell boards; the dual color is a power supply for 6 cell boards;
If the full-color cell board is just like the full power at full brightness.
a, a power supply can bring a few cell board number = power supply voltage * power supply current / cell board horizontal pixel points / cell board vertical pixel points / 0.1/2 For example: semi-outdoor P10: 5V40A power supply can be : 5*40/(32*16*0.1/0.5)=7.8 Take 8;
b. Obtain the required number of power sources based on the total power of the screen = average total power/power of one power supply (power supply voltage*power supply current) Example: One bar screen with 12 P10 modules and 3 P10 modules with high power. Total group: 36 modules. Then the number of required power = 32*16*0.1*36*0.5/5/40 = 4.6 Takes large (5 power supplies)
9, LED display screen resolution calculation
LED display per square resolution = 1/pixel pitch (units M)/pixel pitch (units M) Example: P16 resolution per square = 1/0.016/0.016 = 3906 DOT (dot)