Posts Tagged ‘PWM’

Just like the previous generation of OLED-equipped iPhones, the iPhone 11 Pro and Pro Max both employ OLED panels that are prone to flickering that is particularly visible to those with sensitive eyes. The flickering is caused by PWM (Pulse Width Modulation), a technology used by OLED manufacturers to control display brightness. While both panels feature higher peak brightness compared to the OLED panel Apple used in the previous generations of iPhones, they are still prone to the same flickering at brightness levels lower than 50%. The screen flickering is particularly visible in low ambient brightness conditions, and may cause eyestrain with sensitive users.

Google has equipped its new-generation Pixel 4 and Pixel 4 XL devices with innovative OLED panels offering smooth 90 Hz refresh rates. While these OLED panels look great on paper, they have two major issues. First, the 90 Hz refresh rate is only enabled by Google at brightness levels of 75% or higher. Second, the displays flicker at brightness levels below 75%.

In this article, we’ll describe methods to get rid of OLED flickering on the last generations of Apple and Google smartphones without rooting or jailbreaking. (more…)

The iPhone Xs employs a revised version of the OLED panel we’ve seen in last year’s iPhone X. The iPhone Xs Max uses a larger, higher-resolution version of the panel. Both panels feature higher peak brightness compared to the OLED panel Apple used in the iPhone X. While OLED displays are thinner and more power-efficient compared to their IPS counterparts, most OLED displays (including those installed in the iPhone Xs and Xs max) will flicker at lower brightness levels. The screen flickering is particularly visible in low ambient brightness conditions, and may cause eyestrain with sensitive users. The OLED flickering issue is still mostly unheard of by most consumers. In this article we will demystify OLED display flickering and provide a step by step instruction on how to conveniently disable (and re-enable) PWM flickering on iPhone Xs and Xs Max displays to reduce eyestrain. (more…)

The iPhone X uses a new (for Apple) display technology. For the first time ever, Apple went with an OLED display instead of the IPS panels used in all other iPhones. While OLED displays have numerous benefits such as the true blacks and wide color gamut, the majority of OLED displays (particularly those made by Samsung) tend to flicker. The flickering is particularly visible at low brightness levels, causing eyestrain and headaches to sensitive users. Very few users have the slightest idea of what’s going on, attributing these health issues to oversaturated colors, the oh-so-harmful blue light and anything but OLED flickering.

So let us have a look at what OLED flickering is and how to get rid of it on the iPhone X for much better low-light readability.

Update: We have an updated version of this article covering the iPhone Xs and Xs Max and providing an additional method of controlling PWM flickering via an icon placed in the Control Center.

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