A few days ago I sent back my Nexus 5, from the first batch shipped to France for a defect behind the glass lens

The replacement unit I received immediately seemed to have a better and brighter display, which is confirmed by the measurements graphs attached.

The replacement is brighter, with warmer white point, its RGB channels curves response are a lot closer across the board.
From comparing two phones, I can't tell if one is just better than the other or if Google improved the factory calibration process.

Neither display's white look like D65 daylight white compared to actual daylight or a reference CRT monitor (regardless of the sensor used).

Other info:

Maximum brightness – significant difference
original: 409 cd/m², replacement 510 cd/m²

Contrast ratio – about the same
original: 926:1, replacement: 952:1

Average gamma – interestingly about the same despite the difference in curves
original: 2.07, replacement: 2.08

Up next: results calibrated 😉

#supercurioBlog #calibration #display #color #measurements

         

In Album Display Measurements: first batch Nexus 5 vs refurbished replacement

Source post on Google+

Published by

François Simond

Mobile engineer & analyst specialized in, display, camera color calibration, audio tuning

4 thoughts on “A few days ago I sent back my Nexus 5, from the first batch shipped to France for a defect behind the glass lens”

  1. Check your power button , just had 2 replacements because the power buttons got stuck pressed down. And your right my first batch nexus 5 screen with these replacements was different.

  2. +Hugo Queiriga Fortunately the replacement works great 🙂
    Yes and without a large measurements database it's impossible to tell if they improved the calibration consistency or it's just sample to sample variation.
    From the shape of the curves, I would guess that the calibration is identical – only the panels are respond differently physically.

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