The light source in the seamless splicing screen system is designed as a replaceable component. Unlike LCD and LED, the light source part is an independent subsystem, generally composed of four parts: luminous components, power supply components, heat dissipation components, and structural components. The light source subsystem is an important subsystem of the seamless splicing screen system, which has a significant impact on the design of seamless splicing screen products and the entire seamless splicing screen system.

The choice of light source determines the important indicators of seamless splicing screen system and the initial values of system brightness, uniformity, and contrast. As the light supply system of the entire system, it plays a decisive role in the seamless splicing of screen images.

The heat generation of the light source system is greater than and the temperature is higher, and its stability plays a decisive role in the stability of the entire system. In the early stages of the development of DLP seamless splicing screen systems, many systems were designed as dual light source systems to ensure the stability of the entire system, as their stability could not be fully guaranteed. Almost every early seamless splicing screen manufacturer has experienced the nightmare of continuous light explosions and a difficult growth process.

Due to the characteristics of the light source system, there is inevitably an attenuation period, and the attenuation period of each product is relatively uncontrollable. In this way, after the product is delivered to customers for use for a period of time, there will be significant changes in color and brightness, which require maintenance. The maintenance cycle is determined by factors such as the light source, among which the light source plays a decisive role.

As an important component of seamless splicing screen products, the selection of different light sources will have different maintenance costs for seamless splicing screens in the later stage. Due to the different development maturity and service life of light source technology, the price and frequency of the original components that need to be updated in later maintenance vary, resulting in differences in maintenance costs.