The primary color dominant wavelength error index is changed from "primary color wavelength error" to "primary color dominant wavelength error", which can better explain what characteristics of the LED display are reflected in this index. The dominant wavelength of a color is equivalent to the hue of the color observed by the human eye, which is a mental quantity, a property of colors that distinguish each other. And the performance requirements specified by this industry standard, literally, users are not able to understand that it is an indicator that reflects the color uniformity of LED displays. Therefore, is it to guide users to understand this term first, and then understand this indicator? Or first from the customer's point of view to recognize and understand the LED display, and then give the user can understand the easy-to-understand performance characteristics? As mentioned earlier, GB/T1.2-2002 (Standardization Work Guidelines Part 2 Standard in the Determination of Normative Technical Elements Content Method" on one of the principles of product standard formulation, that is, the "performance principle":" Whenever possible, requirements should be expressed in terms of performance characteristics, rather than design and description, an approach that leaves maximum room for technological development." "Primary color dominant wavelength error" is one such design requirement, and if "color uniformity" is used instead, there is no limited wavelength of the LED.　

For users, as long as you ensure that the color of the LED display is uniform, you don't have to consider what technical means you use to achieve it, leaving as much room as possible for technological development, which is greatly beneficial to the development of the industry.