Samsung Galaxy S27 Ultra may get DC dimming support

Samsung is preparing to introduce DC dimming support on the upcoming Galaxy S27 Pro and Galaxy S27 Ultra smartphones, addressing eye strain issues linked to the company’s long-standing reliance on pulse-width modulation, digitaltrends.com reported.

Eliminating the 480Hz Flicker for Sensitive Users

Tipster WalleGalaxy claims that Samsung will implement DC dimming support on the Galaxy S27 Pro and Galaxy S27 Ultra models. The current Galaxy S26 series relies exclusively on pulse-width modulation operating at approximately 480Hz without offering any flicker reduction alternatives.

Balancing Panel Uniformity With Direct Current Control

Manufacturers have historically favored pulse-width modulation because it allows OLED pixels to operate at a more stable current, maintaining accurate colors, consistent grayscale, and panel uniformity as brightness decreases. Conversely, DC dimming controls brightness by lowering the current flowing through the pixels directly, which dramatically reduces flicker but can compromise image quality, grayscale, and darker colors at very low brightness.

Potential Hybrid Dimming Approach for the New Lineup

Samsung does not necessarily have to choose one approach over the other for the new lineup. The company could utilize a hybrid system that falls back on pulse-width modulation at extremely low brightness levels, an approach Samsung previously employed with the Galaxy S24 FE.

Industry Partnerships and Ergonomic Safety

The S27 Pro | S27 Ultra displays support DC dimming, which helps reduce eye strain.

Digital Trends

Samsung is collaborating with various safety firms to understand how to lessen eye strain problems experienced in earlier models.

Digital Trends

Certification filings and industry disclosures suggest these hardware updates mark a structural shift from the 480Hz pulse-width modulation limits seen in the previous Galaxy S26 series.