LED Display Screen Selection: How to Choose Refresh Rate and Brightness？

In today's performances, press conferences, exhibitions, and live events, LED screens have become a key tool for visual presentation. Not only can it bring stunning visual effects, but it can also enhance brand exposure, audience experience, and live streaming quality.

But you know what? Among the numerous parameters of LED displays, refresh rate and brightness are often the key factors determining success or failure. Especially in complex conditions such as high brightness environment, camera shooting, and multi light interference, insufficient refresh rate and brightness can easily cause the entire performance to 'crash'.

Refresh Rate refers to the number of times a screen updates its image per second, measured in Hz. Common specifications include 1920Hz, 3840Hz, 7680Hz, etc. The higher the value, the more stable and smooth the image.

• Low refresh rates are prone to flickering and scan lines, especially when the camera is shooting or the lighting is strong
• High refresh rate is very friendly to live streaming, ensuring that the image does not tear or bounce
• High speed content such as dynamic animations, esports events, and stage performances must use high refresh rate screens to play smoothly
• A high refresh rate can also alleviate eye fatigue for viewers watching for long periods of time.

The brightness of LED screens is measured in nits, which refers to the luminous intensity per unit area. The brightness of TV screens is generally only a few hundred nits, while LED screens can reach over 5000-10000 nits.

• If the brightness is insufficient outdoors or under strong lighting, the audience can hardly see the picture clearly
• In a stage environment with dense LED lighting, insufficient brightness can lead to color distortion and loss of details
• If the brand logo and performance content cannot be clearly seen, it will affect communication and on-site experience

• Indoor conference LED display screen or theater LED stage screen: 800-1200 nits
• Esports LED, Church LED Screen, Studio LED Video Wall: 900-2000 nits
• Outdoor LED large screen used in the evening or on cloudy days LED display screen: 4000-5000 nits
• Outdoor LED display screen in daytime or strong sunlight environment: 5000-8000+nits

The overall performance of LED screens depends not only on the system architecture and control card, but also closely related to the performance of LED chips themselves.

• High brightness requires the support of lamp beads with high luminous efficiency and high thermal stability
• High refresh rate requires stable response driver IC to cooperate with control
• One of the key factors in determining whether an LED display system is professional is its ability to maintain fine grayscale even at low brightness levels

• Color consistency: Different batches and packaging processes may cause color deviation. It is recommended to use LED beads that have undergone color calibration
• Grayscale expressiveness: Especially in low brightness, whether the image details and gradients can be preserved is the key to judging the quality of the product
• Contrast: Black encapsulated LED or black surface structure helps improve image contrast and reduce light interference
• Protection level: Outdoor applications require at least IP65 rating to ensure dust and water resistance
• Heat dissipation performance: LED generates a large amount of heat in high brightness environments, and inorganic ceramic encapsulated lamp beads have better heat dissipation capabilities
• Wide viewing angle: When using a large screen for multi audience scenes, it is recommended to choose a wide-angle LED with a viewing angle of 160 ° or more

• Q: What is the relationship between refresh rate and video frame rate?
  Answer: The frame rate is the playback speed of the video itself (such as 60fps), and the refresh rate is the update frequency of the display device. A high refresh rate can better present high-speed videos and avoid camera interference ripples.
• Q: Is it better to have higher LED brightness?
  Answer: Not necessarily. The brightness should be matched according to the usage scenario. If the brightness is too high indoors, it will be dazzling. It is recommended to use a control system with adjustable brightness function.
• Q: Does the performance of LED beads directly affect the overall screen effect?
  Answer: Yes. Lamp beads determine the brightness limit, color consistency, and weather resistance of the entire screen, and are one of the core components of LED screens.

Whether it's a music festival, exhibition, corporate annual meeting, or live performance, a high-quality LED screen must have:

• Adequate refresh rate (recommended 3840Hz/7680Hz and above)
• Adequate brightness reserve (outdoor recommended above 7000 nits)
• Reliable LED bead quality (high luminous efficiency, low attenuation, uniform color)

This not only affects the image quality, shooting and broadcasting, but also directly affects the experience of the live audience, the communication of brand image, and even the satisfaction of sponsors.

Therefore, in the selection process of LED screens, please consider "refresh rate" and "brightness" as the most important technical red lines to control.