In a recent development, Li Xiaolong, the CTO of Huawei’s Consumer BG, shared a video that challenges the perceived benefits of PWM (Pulse Width Modulation) dimming at frequencies higher than 1440Hz for eye protection. The video highlights a testing process indicating that the actual harm caused by high-frequency PWM dimming on OLED screens may not be directly linked to the advertised “maximum dimming frequency.” Li Xiaolong suggests that the benefits of PWM dimming at a frequency of 1440Hz for eye protection are minimal.
Li Xiaolong Questions Benefits Beyond 1440Hz
Responding to these claims, Honor, a subsidiary of Huawei, has presented its viewpoint on the matter. Honor believes that the impact of PWM dimming frequency on eye protection is influenced not only by the frequency itself but also by factors such as fluctuation depth and duty cycle. They argue that even with high frequencies, if the fluctuation depth is significant, flickering can still affect the eyes.
Honor recently launched the Honor 90 series with a 3840Hz zero-risk dimming eye protection screen. They claim that when the PWM dimming frequency is high enough, it allows users to disregard the influence of fluctuation depth and eliminates the risk of screen flickering. Honor conducted extensive tests to support their position. They found discrepancies between their own test results and online test results, suggesting that testing equipment and accuracy significantly affect the outcome. Honor also mentioned that existing methods, such as the Stroboscopic Effect Visibility Measure (SVM), may not accurately quantify flickering on mobile phones.
The discussion surrounding the 3840Hz ultra-high-frequency PWM dimming technology of the Honor 90 series highlights the growing emphasis users place on the eye protection experience provided by electronic products. Honor reiterates its commitment to continuous exploration and breakthroughs in eye protection technology, emphasizing their investment in research and their dedication to achieving healthy displays.
While both Huawei and Honor present their perspectives on the impact of PWM dimming frequencies beyond 1440Hz on eye protection, it is challenging to determine who holds the more reasonable stance. Independent research and evaluations could provide further insights into this matter.
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(Via)
