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# The calculation formula of LED display screen is general

Time:2018-10-12 Views:240
1. Calculation method of point spacing
The central distance between each pixel and each adjacent pixel;
Each pixel point can be an LED light [e.g., PH10(1R)], two LED lights [e.g., PH16(2R)], and three LED lights [e.g., PH16(2R1G1B)].The point spacing of P20 is: 20MM;The point spacing of P12 is: 12MM
2. Calculation method of length and height
Point spacing x points = long/high
Such as: PH16 length = 16 point x 1.6 ㎝ = 25.6 ㎝
Height = x 1.6 ㎝ = 12.8 ㎝ at 8 o ‘clock
PH10 length = 32 points x 1.0 ㎝ = ㎝
Height = 16 point x 1.0 ㎝ = 16 ㎝;
3. Module number calculation method for screen
Total area of mold group height = number of modules used
For example, the number of modules used for 10 square PH16 outdoor monochrome led display is equal to:
10 square meters at 0.256 meters at 0.128 meters =305.17678 feet 305
More accurate calculation method: length use module number x height use module number = total number of use module
Number of modules:
Length of modules =5 m
Height of modules =2 m
Total number of modules used =20 x 16 =320
4. Calculation method of LED display visual distance
RGB color mixing distance the distance of three colors blending into a single color:
LED full color screen spacing = pixel spacing (mm) x 500/1000
The minimum viewing distance can show the distance of smooth image:
LED display visible distance = pixel spacing (mm) x 1000/1000
The most appropriate viewing distance the viewer can see the distance of the highly clear picture:
Best viewing distance of LED display = distance between pixels (mm) x 3000/1000
Maximum viewing distance:
LED display maximum visual distance = screen height (m) x 30 (x)
5. Calculation method of LED display screen scanning mode
Scanning mode: the ratio of the number of rows lighted at the same time to the number of rows in the whole area in a certain display area.
Room color is generally 1/16 scan,
Interior full color is generally 1/8 scan,
Outdoor monochromatic color is generally 1/4 scan,
Outdoor full color is usually static scanning.
At present, there are two driving modes of LED display on the market, static scanning and dynamic scanning. Static scanning is divided into static real pixels and static virtual, and dynamic scanning is also divided into dynamic real image and dynamic virtual.The driving device is generally used in domestic HC595, Taiwan MBI5026, Japan Toshiba TB62726, which is generally 1/2 sweep, 1/4 sweep, 1/8 sweep and 1/16 sweep.
Description:
A common full-color module has a pixel of 16*8 (2R1G1B). If it is driven by MBI5026, the module USES: 16*8* (2+1+1) =512; MBI5026 is a 16-bit chip; 512/16=32
(1) if 32 MBI5026 chips are used, it is static virtual
(2) if 16 MBI5026 chips are used, it is dynamic 1/2 scanning virtual
(3) if 8 MBI5026 chips are used, it is dynamic 1/4 scanning virtual
If the board is connected by two red lights
(4) with 24 MBI5026 chips, it is a static real pixel
(5) with 12 MBI5026 chips, it is a dynamic 1/2 scanning pixel
(6) with 6 MBI5026 chips, it is a dynamic 1/4 scanning pixel
In the LED panel, the scanning mode is 1/16, 1/8, 1/4, 1/2, static.What‘s the difference?
One of the easiest ways to do this is to count the number of leds on the board and the number of 74HC595.
Calculation method: the number of leds divided by the number of 74HC595 divided by 8 = a fraction of a scan
Real pixels correspond to virtual pixels:
In simple terms, the real pixel screen refers to the red, green and blue luminescent tubes in each of the three types of luminescent tubes that make up the display screen, and ultimately only participate in the imaging use of one pixel to obtain sufficient brightness.Virtual pixels use software algorithms to control the luminescent tubes of each color and eventually participate in the imaging of multiple adjacent pixels, thus enabling the realization of larger resolution with less lamp tubes and the enhancement of display resolution by four times.
6. Calculation method for the number of LED display power
The power supply is 30A and 40A;The monochrome is a power source of 1 40A for 8 unit panels, and the dual-color is a power source for 6 unit panels.
If full - color unit board is good at full - light when the maximum power.
A. The number of unit plates in a power band = the voltage of the power supply * the current of the power supply/the horizontal pixel points of the unit plate/the vertical pixel points of the unit plate /0.1/2.
B. The number of power required = average total power/power of a power supply (power voltage * power supply current) according to the total power of the screen.Then the number of power required =32*16*0.1*36* 0.5/40 =4.6 large (5 power sources)
7. Calculation method of LED display power
The formula for power is P=UI
P stands for power, U stands for voltage, I stands for current. Usually, the power supply voltage we use is 5V, and the power supply is 30A and 40A.The monochrome is a power source of 1 40A for 8 unit panels, and the dual-color is a power source for 6 unit panels.The power of outdoor screen refers to the "product parameters" on the website, which are very clear.
Here is an example
A unit to do 9 square meters of indoor 5.0 dual-color electronic screen, calculating the maximum power required.Figure out the number of power sources for 40A =9 (0.244*0.488) /6=12.5=13 power sources (to be round, to be large).Single lamp power = 5V*20mA= 0.1w
Power of LED display unit panel = power of single lamp * resolution (horizontal pixel number * vertical pixel number) /2
The maximum power of the screen body = the resolution of the screen body * the number of lights per resolution *0.1
The average power of the screen body = the resolution of the screen body * the number of lights per resolution *0.1/2
Actual power of the screen body = resolution of the screen body * number of lights per resolution *0.1/ scanning number (4 sweep, 2 sweep, 16 sweep, 8 sweep, static)
8. Calculation method of LED display brightness
Brightness: the overall brightness of the screen is integrated by the brightness of a single light.
Examples are as follows:
The P16 outdoor full-color screen at 3906 points is 2R1PG1B(1/4 scan), and the American pipe core of dalian road, in which the luminous brightness of red tube is 800mcd, the luminous brightness of green tube is 2300mcd, and the luminous brightness of blue tube is 350mcd. From this, it can be calculated that the theoretical brightness of a square is (800*2+2300+350) *3906/1000/4=4150cd
How to compute the luminance of a single tube under clear brightness and point density requirements?
The calculation method is as follows :(take two red, one green and one blue for example)
Red LED brightness: brightness (CD) /M2
Green LED brightness: brightness (CD) /M2 / points /M2 * 0.6
Brightness of blue LED: brightness (CD) /M2 / points /M2 * 0.1
For example, the density is 2500 points per square meter, 2R1G1B, and the brightness is required to be 5000 CD/M2 per square meter, then:
The red LED light is at: 5000/2500/0.3/2=0.3
Green LED lighting: 5000/2500/0.6/2=1.2
The blue LED light is at: 5000/2500 x 0.1=0.2
The brightness of each pixel is 0.3 x 2+1.2+0.2=2.0 CD
9. Calculation method of LED display resolution
LED display resolution per square meter =1/ pixel spacing (unit to M)/pixel spacing (unit to M) for example: P16 / square resolution =1/0.016/0.016=3906 DOT(DOT)
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