TCL CSOT has received the world’s first SGS Quasi-Natural Light Spectrum EX certification for its Natural-Spectrum Slim Pad Display. Announced at MWC Shanghai 2025, the certification confirms the display’s strong performance in spectrum accuracy and wide color coverage. It is the first display globally to pass this new standard.
The display uses TCL CSOT’s Quasi-Natural Light Spectrum Display Technology, which adjusts both the backlight and RGB color filters to produce light closer to natural sunlight. This helps reduce eye strain during long screen use.
During the day, the display promotes dopamine release in the retina, which may help lower the risk of nearsightedness. At night, it reduces melatonin suppression, supporting better sleep.
SGS, a global certification company, developed a new evaluation system for quasi-natural spectrum displays. The standard, called PT-25-000-203860, compares a display’s output to natural light in the 380-780nm visible range.
The main test is the Quasi-Natural Light Index (QNLI), which measures how closely a screen’s spectrum matches natural daylight at noon. TCL CSOT’s display scored 56%, well above the minimum required for EX-grade certification.
Jou Ming-Jong, head of technology planning at TCL CSOT, said the award shows the company’s focus on eye-care innovation. TCL CSOT has also worked on low blue light, anti-glare, and circular polarizer technologies in the past.
SGS China’s Vice President Zhao Hui said TCL CSOT’s approach sets an example for the rest of the industry to improve screen quality and support healthier use.
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