Samsung Galaxy S27 May Introduce DC Dimming Option for Display Sensitivity

Potential Display Change for Galaxy S27

Rumors suggest the upcoming Samsung Galaxy S27 may feature an optional DC dimming mode for its display. This would mark a significant shift from Samsung's long-standing reliance on Pulse Width Modulation (PWM) dimming, particularly at low frequencies.

Addressing PWM Sensitivity

Many users report adverse effects from low-frequency PWM dimming, including headaches, eye pain, and nausea. Advocacy groups and online communities highlight these issues, indicating a demand for alternative dimming methods. Motorola has offered DC dimming on its OLED phones for years, providing a precedent for Samsung's potential move.

PWM vs. DC Dimming

PWM dimming rapidly cycles the display on and off to control brightness, while DC dimming adjusts the voltage supplied to the pixels. While PWM can offer better display quality in low light and potentially better battery life, DC dimming is often considered more comfortable for sensitive users. However, DC-dimmed OLEDs can sometimes exhibit 'mura' at low brightness, where pixels dim unevenly.

Samsung's Prioritization of PWM

Samsung has historically favored PWM dimming due to perceived advantages in display quality, energy efficiency, and manufacturing cost. PWM dimming can be implemented largely through software, whereas DC dimming traditionally requires additional hardware. As battery technology advances and user feedback on PWM sensitivity grows, these priorities may be shifting.