Cubot X19 Review

9 February 2019, 17:03:33

Cubot X19 Review
Our review unit is courtesy of Cubot and you can buy Cubot X19 at a promotional price from Cubot Direct Store on AliExpress or from Gearbest.

Display

Cubot X19 packs a 5.93-inch IPS display with a resolution of 1080 x 2160 pixels and GFF full lamination. GFF stands for glass-to-film-to-film. Such panels employ a two-film sensor that bonds together a PET film, ITO (the Y-axis touch electrodes), OCA (optical clear adhesive), then another PET film, ITO (the X-axis touch electrodes) and OCA. Afterwards, the whole thing is covered with a protective glass. Full lamination increases the sensitivity of the displays and allows them to be even thinner. The manufacturer specifies a brightness of 450 cd/2 and a 1300:1 contrast ratio. Below we publish our display measurements. There's only one table because there is no difference between the results from the single-frame and two separate frames measurement.
Brightness White luminance Black luminance Contrast Color temperature
100 % 644.401 cd/m2 0.424 cd/m2 1520 : 1 7692 K
50 % 351.761 cd/m2 0.233 cd/m2 1510 7669 K
0 % 22.937 cd/m2 0.015 cd/m2 1529 7719 K
For a $160 smartphone, Cubot X19 has an impressive brightness. The value we got at 100% brightness level is 644.401 cd/m2. This makes the display of this model the 8th brightest screen from all the smartphones we've tested so far. The static contrast ratio is higher than specified - 1500:1 and remains pretty equal at all brightness levels. The same is valid for the temperature of the white point - it does not change significantly no matter whether the brightness is at 100%, 50%, or 0%. What's more, despite the very high brightness, the temperature of the white point is within the very acceptable level 7700 K. This is a rare quality for a smartphone of that price segment.
Peak brightness (100% APL)
Samsung Galaxy S10 Exynos
742.008 cd/m2
Samsung Galaxy S10+ Exynos
735.262 cd/m2
Huawei P10
660.843 cd/m2
Samsung Galaxy S9 Exynos
660.356 cd/m2
Xiaomi Mi 5s
660.142 cd/m2
Doogee S60
653.279 cd/m2
Xiaomi Mi Note 3
650.464 cd/m2
Xiaomi Mi 5 Standard Edition
648.5 cd/m2
Xiaomi Mi 5s Plus
645.889 cd/m2
UMIDIGI S2 Pro
645.024 cd/m2
Cubot X19
644.401 cd/m2
UMIDIGI S2
625.524 cd/m2
Samsung Galaxy S9+ Exynos
624.854 cd/m2
Bluboo S8+
622.044 cd/m2
Xiaomi Mi 6
620.987 cd/m2
Asus ZenFone 3 ZE552KL
615.106 cd/m2
Blackview R7
610.649 cd/m2
Elephone S3
602.861 cd/m2
Xiaomi Mi 9
601.556 cd/m2
Doogee BL9000
601.022 cd/m2
Doogee S80
587.173 cd/m2
The manufacturer specifies a colour space coverage that equals 90% of NTSC. However, the CIE diagram unveils that it is less than that. Actually, colours in the blue-green and purple-red areas might look a bit dull, while those in the green-yellow and red-orange areas might look slightly punchier than usual. The display panel has a traditional vertical striped RGB subpixel arrangement.

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