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Know about LED display module parameters

Knowing about the LED display module parameters can help you to choose the best LED screen, no matter it is for indoor, outdoor, or rental.

LED display module is the core of the LED display. With the development of LED display industry and the growing demand for applications, the function and role of the LED display module become more and more important. From Colorlight experence, let’s learn more about what is the  most important parameters of LED display module.

LED display module panel

Parameters

Color

It is the most basic parameter of LED display module. Different colors LED display module is used for different applications. According to the type of color LED display module can be divided into two following two types: Single color LED display module, Full Color LED display module. Single color LED display module is mostly with one color such as Red, green, blue, white, or yellow. Full color LED module consit of Red, green and blue, it is also called RGB LED display module.

Brightness

This is a very important indicator for choosing outdoor LED displays, which have a high requirement of brightness in the outdoor environment. In general, the brightness of the indoor LED display module is lower than the outdoor LED display module.

View Angle

The View Angle of the LED display module is determined by the LED lamp. In general, we always choose the LED display module whose view angle is wider. Currently, most LED display module viewing angles are from 100 degrees to 140 degrees in the horizontal direction, and from 60 degrees to 70 degrees in the vertical direction.

Working temperture

The normal working temperature of the LED display module is between -18°C and 58°C.

Power Consumption

It is an important one of the LED module parameters, the current 12V low-voltage module is the most common. When connecting the power with the control system we must check the correctness of the voltage value before powering on, otherwise, it will damage the LED display module.

Dimension

There is no uniform standard size for LED display modules, for your reference, please check the following table to learn about most pixel-pitch LED display module sizes.

Pixel PixtchDensity(dots/m2)Module ResolutionModule Size(mm)
P2mm250000128*64256*128
P2.5mm16000064*64160*160
P2.98mm11260884*84250*250
P3mm11111164*64192*192
P3.91mm6574664*64250*250
P4mm6250064*32256*128
P4.81mm4326452*52250*250
P5mm4000064*32320*160
P5mm4000032*32160*160
P5.95mm2822442*42250*250
P6mm2777732*32192*192
P6.25mm2560040*40250*250
P6.67mm2247848*24320*160
P8mm1562540*20320*160
P8mm1562532*16256*128
P10mm1000032*16320*160

Waterproof Level

This parameter is mainly for outdoor LED display modules. It is an important indicator that can ensure LED display modules can long-term work in outdoor circumstances. Currently, the Minimum Standard of waterproof level is IP65.

Pixel

It is the smallest unit that can be independently controlled on the screen. PIXEL is an abbreviation of pictureelement. On a three-color screen, pixels consist of three parts: red, green, and basket. Each part consists of one or several leds. Theoretically, they are individually adjusted. The brightness of red, green and blue can be expressed in any color.

Pitch

The distance between the centers of adjacent pixels. The smaller the distance, the shorter the viewing distance.

Resolution

Usually used for digital display devices, representing the total number of pixels, generally written in a wide X high form, such as 800X600.

Viewing angle

The maximum brightness that can be seen when the observer is facing, when the viewer moves to the left or right, the brightness is reduced, and when the brightness is reduced to half of the maximum brightness, the angle at this time is added to the The sum of the angles obtained by moving in the opposite direction is called the horizontal viewing angle and the vertical viewing angle is measured in the same manner. The perspective manufacturers will give parameters.

Visual distance

For various LED displays, the best viewing distance should be the smallest distance that the human eye can’t distinguish between pixels. This distance is about 3400 times the distance between points. The viewing distance between TV and computer is usually less than this requirement, but the acceptable distance can not be less than 1700 times the distance between points.

Refresh rate

The rate at which the screen image is updated, usually expressed in Hertz (Hz), is different from the frame rate.

Frame rate

The number of image frames displayed per second on the screen, usually depends on the input signal (25fpsforPAL, 30fpsforNTSC)

Color temperature

The brightness of red, green and blue must be balanced to accurately restore the true color. In other words, the white color of the LED must be white instead of pink. If red, green and blue are all at the highest brightness, the mixed colors are usually not white. In order to get white (usually called 6500K color temperature), one or two of the red, green and blue lights must be turned down. To get the correct white color, you must Measured repeatedly to adjust the brightness, this process called white balance, LED display price.

Grayscale

The number of colors that an LED screen can represent depends on the RGB three-color gray scale. In a standard full-color screen, it is 256 levels of gray. For stadium full-color LED systems, 256 gray levels are not enough to accurately recover Restore color. Also known as color depth, refers to the number of different brightness, red, green and blue have their own grayscale, in a full-color system is generally 256 levels of gray, can produce 256X256X256 = 16,777,216 kinds of colors, called 24-bit color in PC, It is called an 8-bit system in LED display systems.

GAMMA correction

This is a way to reduce the number of gray scales by transforming functions to produce a color and contrast that is closer to the real environment. The actual color of full-color screens is subject to many restrictions. At night, the brightness of the screen body must be reduced. The color will be reduced, therefore, the digital RGB display color is certainly less than the 16M color, in order to solve this problem, you need a higher level of gray, 1Bill color system (red, green and blue 1024 color) can be more realistic color , because from the 256 gray scale expanded to 1024, greatly enriched the number of colors that can be expressed.

Consistency

The quality of the entire picture largely depends on the consistency of the LED. The problem of consistency is the inherent problem of LEDs when LEDs are produced. Their brightness, viewing angle, and other characteristics are actually not uniform. These parameters are distributed in a certain range. The better the manufacturer’s process control, the smaller this range, and the use of LEDs provided by high-quality manufacturers can reduce the workload of debugging. The sensitivity of the human eye to color and brightness is quite high, and the difference between LEDs is easily noticeable, especially in high-brightness display systems. Designers must adopt various techniques to eliminate this difference. , increase consistency, LED display manufacturers.

Color difference

LED large-screen combination of red, green and blue to produce a variety of colors, but these three colors are made of different materials, the viewing angle is different, the spectrum distribution of different LED are changed, these differences can be observed It is color difference. When observing the LED at a certain angle, its color changes, and the ability of the human eye to judge the color of the real picture (such as a movie picture) is better than the picture produced by the observation computer.

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