白平衡色坐标是考量LED全彩显示屏色彩还原度的重要技术指标，当前厂家多是采用前期白平衡调制的方法来控制白平衡参数，但因为生产流程中众多因素的影响，最终生产出的LED屏的白平衡坐标却必然会产生漂移。本文介绍了当前最普遍的前期白平衡调制方法，以及影响白平衡最终效果的因素，并探讨通过逐点校正后期校准白平衡色坐标的原理、方法和实践。

The chromaticity coordinate of white balance is a key index to evaluate the color fidelity of LED full-color display. Currently in factory the prior adjustment method is mostly used to get the target white balance. But effected by various of factors in manufacture process, the chromaticity coordinate of white balance shift inevitably from the design. In this paper, the most popular prior adjustment method and the factors effect final white balance performance would be discussed, and a new way, depending on pixel-level correction to get exact white balance chromaticity coordinate is introduced, including the principle, the method and the practice.