The visual 'color uniformity' indicator includes two parts of optical technology: chromaticity uniformity and brightness uniformity. If any one of the two indicators is unreasonable, then the visual display of the display will result in a 'uneven color, block feeling. Therefore, controlling the Fixed LED Video Display color will undoubtedly start with the chromaticity and brightness of the illuminated LED Video Display.
Under normal circumstances, the human eye color resolution threshold is 5nm, taking the red LED as an example: two LEDs with illuminating wavelengths of 620nm and 626nm are lit together, and the human eye will feel the light emitted by the two LEDs. There are differences in color.
So theoretically, if a display uses LEDs of the same luminous wavelength, the problem is solved very well. However, from the perspective of LED PN junction fabrication, it is impossible to batch the most 'growth' (ie, a term for semiconductor manufacturing) products of the same wavelength. Under normal circumstances, after a 'growth' is completed.
The LED chip has an emission wavelength in the range of several tens of nm, which is a feature of the semiconductor light-emitting chip manufacturing process itself.
Therefore, the use of LEDs of the same wavelength will mean an alarming increase in the manufacturing cost of the display screen, because this can only be solved by purchasing a larger number of Fixed LED Video Display, from which the most concentrated part of the emission wavelength is selected. To use.
The way to use our company's LED color display is to strictly control the illumination wavelength of each Fixed LED Video Display. And LEDs with different wavelengths exhibit discrete distribution.