Basic Knowledge of LED Modules (Part 1)

1. Classification of Modules

There is no unified standard for module classification. Generally, they can be categorized based on different scenarios. For example:

• By application environment:

Indoor: Brightness ≤2000 cd/m², not waterproof.
Outdoor: Brightness ≥5000 cd/m², waterproof.

• By pixel pitch: P1.5, P2.9, P3.9, P4, P5, etc.
• By usage type: Fixed installation, rental, stage, stadium, etc.

2. Module Parameter Calibration

The three most critical parameters for modules are: brightness, color temperature, and current.

Brightness

• Definition: Luminous intensity per unit area. The unit is cd/m² (commonly called “nits”).
• Measurement Method: Assemble the modules into a screen and use a light meter to test the brightness.

Color Temperature

• Definition: Color temperature is the “color temperature”. The color temperature value of a light source refers to the color of the light emitted by this light source, which is the same as or closest to the color of the light emitted by a black body at a certain temperature. The temperature of the black body is defined as the color temperature of the light source.
• Common Standards:

           –The color temperature of outdoor screens is generally D75, which is 7500K, and the color coordinates are (0.299, 0.315).

-The color temperature of indoor screens is generally D65, which is 6500K, and the color coordinates are (0.346, 0.359).

• Other Standard Color Temperatures:

-D40: (0.380, 0.379)

-D50: (0.346, 0.359)

-D55: (0.332, 0.347)

-D65: (0.313, 0.329)

-D75: (0.299, 0.315)

-D93: (0.284, 0.293)