LED Display Screen Procurement Guide
1. Introduction of LED Display Screen
An LED display screen is an array of pixels composed of a single or multiple LEDs (light emitting diode). Through the use of a certain control mode, the LED display screen is designed for showing graphics, text or other information. When selecting the best LED display for your application, you’d better focus on both its functionality and practicality.
2. Differences between LED Display Screen and Other Display Units
Compared to CRT (Cathode Ray Tube), LCD (Liquid Crystal Display) and PDP (Plasma Display Panel), etc., the LED display screen boasts higher brightness, and suits various indoor and outdoor applications. In addition, the size of LED screen can be varied according to specific needs, which is incomparable with other display units.
3. Advantages and Disadvantages of a Variety of LED Display Screens
In terms of different LED luminescent devices, the LED display screen falls into several types such as SMD LED display screen, LED curtain, and LED pixel display screen, to name a few.
The SMD LED display screen can be made through high automation manufacturing process, providing high maintainability and wide indoor and outdoor applications. Lacking superior mask, the LED screen is liable to dust collection and has IP3 protection level.
The LED curtain, though low priced, comes with low brightness, poor heat dissipation and fast light decay, and is thus often used in environment where high brightness is not necessary.
Through secondary optical correction, the LED pixel display screen offers extended viewing angle and effective light-emitting area while maintaining high luminance. With a wide viewing angle range, spectators can enjoy their watching without sacrificing eyesight. What’s more, the LED pixel display screen provides protection level of IP65, safety performance for outdoor application, and is great value for money.
4. Refresh Rate and Frame Rate
The LED screen refresh rate indicates the number of times that the image refreshes every second. It determines the stable display of images on the screen. For an LED display screen with higher than 8bit grayscales (256 gray levels), the refresh rate should be more than 100Hz. Otherwise, flickering or rippling of the images will occur, causing eye fatigue for spectators. However, the frame rate is the number of frames or images that are projected or displayed per second, which is generally 50Hz or 60Hz.
5. Brightness and Viewing Angle
Varied brightness is required of an LED display screen in different environment. An outdoor display unit usually has viewing angle between ±35°and ±50°, while the indoor display, with lower illuminance than ambient lighting, needs larger angle. The smaller the viewing angle of an LED device, the higher the brightness.
The high brightness LED display screen provides high contrast ratio and clear, bright images. However, too high brightness may hurt your eyes while leading to high power consumption and short life of the device. Therefore, it is wise of you to choose the right brightness and viewing angle according to your application needs.
6. Energy Conservation Technology
Or Rishon Digital LED display screen comes with adjustable brightness to suit different needs, which helps reduce power consumption. In addition, automatic brightness control mode is available for the energy efficient LED panel. In this way, the display screen unit prevents unnecessary light pollution as well as SAVE your cost.
7. Safety Requirements
Electromagnetic compatibility (EMC) is an important safety index of LED display screen. A reliable LED display screen unit must meet specified standards for electromagnetic radiation and immunity to interference. Only those comply with related EMC standards are likely to be CCC certified.
On special occasions, soft protection mask is essential for an LED panel. There should be no angular components. So body injury can be avoided. Also, fire retardant materials should be used for the LED screen.
In addition, the LED display screen should offer safety design for lightning, surge, leakage and ground protection, as well as dust and moisture prevention.
8. Specifications and Viewing Distance
When you are to choose an LED display screen concerning the viewing distance, specifications, and pixel pitch, please refer to the following data tables.
Pixel Pitch and Optimum Viewing Distance
Minimum Viewing Distance and LED Display Screen Specifications
9. Brightness of LED Display Screen
It is important to choose suitable brightness of LED display screen, which is related to ambient lighting.
Ambient Lighting and LED Display Screen Specifications
10. Protection Requirement of LED Display Screen
To use the LED display with proper protection levels in different environment can effectively ensure normal operation and long lifetime of the display unit.
Temperature, Humidity, Dust of LED Display Screen
Protection Class of Enclosure
11. Protection Class of Enclosure (IP Code)
Here in IP code, IP is short for international protection. For example, in IP65, 6 signifies dust prevention from dangerous parts, and no dust or foreign solids have entered into the enclosure of the equipment. 5 symbolizes water protection in all directions.
