One of the Google Pixel 4’s headline features is its much-lauded “fast and responsive” 90Hz display, but a user has just found out something huge about the way it works.

The refresh rate automatically switches from 90Hz to 60Hz when screen brightness drops below 75%. That’s something Google didn’t mention at the handset’s unveiling.
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https://www.trustedreviews.com/news/the-pixel-4-screen-refresh-rate-trick-makes-for-dim-reading-3949076