What is the SMD LED color tolerance SDCM?
Color tolerance refers to the difference between the formula calculated by the computer and the target standard. It is calculated under a single lighting source. The smaller the value, the higher the accuracy. However, it should be noted that it only represents the color comparison under a certain light source, and cannot detect the deviation under different light sources. The difference between the spectrum emitted by the light source and the standard spectrum.
The standard spectrum changes with the color temperature. If the standard spectrum of the same light source is different, the color tolerance is also different, but when measuring, the general photochromic analysis system will automatically identify the color temperature range of the measured light source to determine the color temperature of the standard spectrum. The unit of color tolerance is SDCM, and the color tolerance required by general energy-saving lamps is less than 5SDCM.
What is the SMD LED color tolerance SDCM?
Color tolerance is the difference between the X and Y values calculated by the software of the photochromic electrical detection system and the standard light source. The smaller the value, the higher the accuracy.
The spectrum of the standard light source changes with the color temperature. When the color temperature is different, the standard spectrum is different (generally, the testing equipment will automatically recognize the color temperature range of the tested LED light source and determine the corresponding color temperature value of the standard light source), and the color tolerance is different. At the same color temperature, the reference standard spectrum is the same, and the color coordinates X and Y are different, the color tolerance is different.
Color tolerance unit: SDCM. GB-T17262-2002 single-ended fluorescent lamp performance requirements standard stipulates that the color tolerance required by general energy-saving lamps should be less than 5SDCM. The GB24823-2009 general lighting LED module performance requirement standard stipulates that the color tolerance required by the LED module should be less than 7SDCM.
