7 Key parameters about LED display

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Author : LISN LED
Update time : 2023-09-26 09:14:04

1. Brightness

Brightness, as one of the most important parameters of LED Display, is the key to our choice of LED Display.LED brightness is typically expressed in Luminous Intensity, in CD;1000UCD =1 MCD, 1000mcd=1 CD.

 

The brightness of LED  display screen refers to the luminous intensity per unit area of the display screen when the display screen is working normally. The unit is CD/m2 (i.e., the luminous intensity of how many CDs there are per square meter of the area).

The brightness higher for the LED display, the brighter of the image, and the sharper of the screen when looks from a distance.

The brightness of LED display is a difficult indicator to measure, but can be measured by professional tools.

Generally, the brightness of indoor LED display is around 400-800nits , and that of outdoor LED display is around 4000nit-6500nits.In some areas of direct sunlight, brightness requirements even reach 7000nits-10000nits.Ultra-high brightness LED displays usually require special SMD lamps or use of DIP lamps.

2.View angle

The View Angle of the LED display refers to the Angle at which the user can clearly view all the content on the screen from different directions.And the visual Angle is a reference value, LED full color display visual Angle including horizontal and vertical two indicators.Technical parameters are described as follows (visual Angle: 140°/140°);The maximum viewing Angle is 140°, and the maximum horizontal and vertical viewing Angle is 140°. if beyond 140°, the viewing effect is poor or there are blind spots.

The larger the scope of the full color LED screen can be seen by the audience, so the larger the view Angle will be better.However, the size of the view angle is mainly determined by the encapsulation method of the LED lamps, so it must be carefully considered  encapsulation brand LEDS.In addition, the view Angle has a great relationship with the viewing Angle and distance, but at present, most LED display manufacturers have the same Angle. LISN LED reminds you: if you customize the Angle according to the situation of the scene, the cost will be very high.In addition, with a same LED chip, the bigger of the Angle of LED full color screen brightness will be lower.

3.View distance

View distance refers to the best distance from which the user can View the LED display.In fact, it is difficult to have a specific test standard for View distance, which is related to screen brightness and installation environment such as air quality and installation height, but it is most directly related to LED pixel and screen size.The smaller the Pixel, the smaller the closest distance you can see, and the larger the Pixel, the greater the closest distance you can see.And the larger the screen, the greater the distance you can see.

Usually, View distance in LED parameter mainly describes the nearest and farthest distance that a pixel's screen can View per square meter in the horizontal direction.For example, the View distance of P10mm is 10-100m, and the View distance of P5mm is 5-50m.

 

4. Gray scale

Gray scale is the so-called color scale or gray scale, which refers to the degree of brightness. Also known as half-tone (Half-tone) is mainly used to transmit pictures. There are three methods of 16, 32, and 64 levels respectively. It uses matrix processing to process the pixels of the file into 16, 32, and 64 levels to make the transmission The picture is clearer. The higher the gray level of the LED display, the richer the color and the brighter the color; on the contrary, the display color is single and the change is simple.

A grayscale image is a monochrome image with 256 grayscale levels or levels from black to white. Each pixel in the image is represented by 8-bit data, so the pixel value is one of 256 gray levels between black and white. The image has only gray levels and no color changes.

5. Display color

 

Display color refers to the number of color types that the display can display. The color of our full-color LED display can reach 16.7M, which means that this display can support a maximum number of 16.7 million colors, that is, 16.7 million different colors can be displayed. "M" means million and is short for million.


6. 
Brightness adjustment

Refers to the brightness that the LED screen can adjust from the lowest to the highest value, usually 0-100, can also be understood as 0%-100% of the highest brightness.

When selecting the LED display screen solution, many outdoor screens will add automatic light detection to adjust the brightness of the screen according to the changes in the sunlight environment. A good brightness value can have a better visual effect and save power consumption.

 

7. Operation power

 

The operation power refers to the screen's working input voltage range and the frequency of sinusoidal alternating current. This value is mainly based on the implementation standards of various countries to match the power supply. We will confirm with the customer before the trip order that the screen uses the national voltage standard, if There are special standards that require a specific power supply.

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