The 90Hz of the Pixel 4 are limited, Google explains the reason
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One of the most attractive features of Google Pixel 4, its screen with image update frequency of 90Hz, has a limitation. Currently, the screen image refresh rate it falls to the standard 60 Hz when the brightness is less than 75%. Google I promised to fix it, or at least, bring the mode to more "brightness conditions". But still, the mountain view giant I had not explained why the limitation was necessary. We know that a screen of 90Hz consumes more energy than a standard 60Hz display. In addition, the standard Google Pixel 4 has a capacity to fairly limited battery of 2800 mAh (Although the XL version greatly improves this figure with 3700 mAh). That may have been one of the reasons, but the official pronouncement was still missing.
Explanation of XDA to the 90Hz screen limitation of Google Pixel 4
The boys of XDA-Developers They found a reason after inquiring into the software code. According to the investigation, the screen uses different calibration profiles for 60Hz and 90H modesz. Apparently, The screen manufacturer has not combined them perfectly.
As a result, the phone works with slightly different display levels. This is not so aggressive, but users easily notice the "downgrade" In certain circumstances. After all, the screen changes between 90Hz and 60Hz quite frequently.
Google official explanation
Google says that the reason they limit 90Hz to higher brightness in Pixel 4 is that a flicker on the screen may be visible as the update frequency is changed, especially when the screen brightness and ambient brightness are low. This is because the screen does not support a true dynamic / adaptive refresh rate, and different update frequencies require different screen gamma curves (calibration). The different gamma curves are difficult to combine perfectly, so the difference can be noticed when switching between the two update frequencies.
You can always keep the screen at 90Hz from developer settings
The difference in calibration It is more pronounced when the brightness is set to lower levels. Also Our eyes become more sensitive to changes in brightness in the dark. The screen flickering problem can be easily solved forcing the screen to always work at 90Hz through the Google Pixel 4 developer options. However, it is also important to remember to do this last Increase battery consumption.
For the moments, wait for the promised Google update to extend the brightness range where 90Hz of the screen are present.
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