Features and Uses of the Guidance Screen

  At present, the construction of monitoring centers for expressways in various cities in China has been basically completed. At the same time, the real-time broadcast and release system of traffic information for urban expressways has been launched, and LED traffic guidance screens have become the main force for relieving traffic congestion and ensuring smooth traffic in major cities and expressways.

What are the characteristics of the traffic guidance screen?

1. High brightness, reasonable viewing angle design for different roads

The release of road traffic information is mainly for road travelers. The viewing angle for expressways is 30 degrees and for urban roads is 70 degrees. The displayed content should be clearly visible when the surface of the display screen is directly exposed to sunlight. Therefore, a higher brightness is required. Under normal circumstances, the visual distance is required to be about 200m.

1. The display colors are mainly red, green and yellow

The release of traffic information is mainly for vehicle drivers. The staying time of moving vehicles within the visual distance is short. Therefore, it is necessary to avoid using complex multi-gray-scale graphics and animation content. The displayed content is mostly text and simple graphic signs. Considering the common colors of traffic sign signals, red, green and yellow display screens are adopted. The three colors can respectively display prohibited, indicated, suggested and warning information, etc.

1. The brightness of the display screen is automatically adjustable

The traffic guidance screen works 24 hours a day and the ambient illuminance changes greatly. It is necessary to ensure that the display screen is clearly visible at the maximum ambient illuminance during the day and avoid the "glare" phenomenon on rainy days and at night. The brightness of the screen needs to be automatically adjusted according to the ambient illuminance.