Nine Tips To Easily Choose A Good LED Display
1. Brightness:
The maximum brightness refers to the brightness of each primary color of the LED display at the highest gray level and the highest brightness under a certain ambient illumination. In short, it is the brightness measured by the light gun in the normal direction when the display is set to white 255 levels using the software. For outdoor LED displays, depending on the environment in which they are used, there will be different requirements for the maximum brightness, because in the case of strong ambient light, the brightness of the LED display is required to be higher, so that the masses can clearly see the content displayed on the screen.
2. Color temperature
When we see on the display that the color of the image is inconsistent or different from the material, our picture is seriously distorted, which is related to the color temperature of the white balance of the LED display. If the human eye directly looks at the display, the white balance The color temperature value is between 6500 and 8000K, and if it is a display screen used by TV stations, the actual color temperature of the screen needs to be adjusted to about 5500K, so that the picture on the display screen is real after being recorded and broadcasted by the camera. .
3. Refresh rate
The refresh rate refers to the number of times the information displayed on the LED display is completely displayed per second. If the refresh rate is too low, the LED display will shake when viewed by the human eye. Usually, we will see scan lines appearing when shooting with the camera. High refresh can improve the brightness and color fidelity of the display. It can be detected with a digital camera. If it is a high refresh rate, the picture taken by the camera is very clear, without snowflakes and scan lines. This metric is especially important when it comes to rental screens and TV broadcasts.
4. Wavelength
The wavelength determines whether the color is pure or not and whether the color is consistent. The way to distinguish is very simple, first: the whole screen is displayed in white, and the screen should be pure white without any other noise. Second: print out red, green, and blue monochromatic colors. The color of the central wavelength is what we usually call true blue, true red, and true green. If the color is darker or lighter, it proves to be a partial wavelength.
5. The viewing angle of the light-emitting tube
The light-emitting angle of the light-emitting tube refers to the angle formed between the two viewing directions of the same plane and the normal direction when the brightness in the viewing direction drops to half of the brightness in the normal direction of the LED display. Divided into horizontal viewing angle and vertical viewing angle. For outdoor LED advertising displays, elliptical light-emitting tubes or SMD light-emitting tubes are generally used. The elliptical light-emitting tube has the characteristics of small angle and high brightness, while the vertical viewing angle of the SMD light-emitting tube is much larger than that of the elliptical tube, but its brightness is smaller than that of the elliptical light-emitting tube. , From the user's point of view, light-emitting tubes with different viewing angles should be selected according to the audience surface of the LED display screen and the surrounding light environment.
6.The circuit design part
The design and materials of the circuit board play a vital role in the stability and display effect of the LED display. Normally, the heavier the better. 2. Several key points in design: connectors, connectors refer to the connection between the module and the module, there are two main types that are used more in the market now, one is the horn, the other is the row. Needle. The advantage of the horn is that the cable can be stuck by the two card positions, and it is not easy to cause faults caused by the problem of the connector. Regarding the choice of electrolytic capacitors and tantalum capacitors, for occasions requiring long life, tantalum capacitors are undoubtedly the first choice. Where a low price is required, electrolytic capacitors are the first choice.
7.Automatic production equipment
Most of the LED displays are electronic components, and static electricity is very harmful to electronic components. Sometimes static electricity directly breaks down components and damages them. Sometimes it does not directly breakdown, but it leaves hidden dangers and side effects. The components are damaged after being used for a period of time.
8. Average power consumption
The power consumption of the LED display generally has two indicators, one is the maximum power consumption, and the other is the use power consumption. The maximum power consumption refers to the power consumption of the LED display screen at the maximum brightness. How to distinguish the maximum power consumption with eyes? The method is very simple: look at the number of power supplies behind the box, multiply the maximum power of each power supply, and determine the maximum power consumption according to the size of the box. The maximum power consumption per square meter can be calculated based on the size. Generally, there are two types of power supplies, 200W and 300W.
9.Indoor small spacing selection
Low brightness and high gray, low brightness and high gray, the specific explanation is: when the brightness range of the small-pitch LED display is in the range of 100 cd/O—300 cd/O, the grayscale of the display screen will not be lost, or the degree of grayscale loss will be within the range of human beings. within the range that is imperceptible to the eye.
