Cubot King Kong 3 Review

16 November 2018, 13:27:03

Cubot King Kong 3 Review
Our review unit is courtesy of Cubot and you can buy it at a promotional price from Gearbest.

Display

Cubot King Kong 3 is equipped with a 5.5-inch IPS display with a 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. Further, the display of the model has a resolution of 720 x 1440 pixels, 450 nits of typical brightness and 1300:1 static contrast ratio. Below you will find our measurements of the display of the King Kong 3 review sample we've received from Cubot. Ever since the early spring of this year, we have noticed that when we switch from one colour to a fully black screen, handsets with IPS displays need about 10 seconds to show the black they are capable of showing. During these 10 seconds, the screen gets darker and darker. That's why we have started making two measurements, in order to give a more realistic picture of the static contrast, white and black luminance values. The Single Frame measurements show the white and black luminance of a screen that shows 50% white and 50% black. The Separate Frames measurements show the white and black luminance of a fully white and fully black screen.

A single frame, 50% white / 50% black

Brightness White luminance Black luminance Contrast Color temperature
100 % 314.443 cd/m2 0.216 cd/m2 1456 : 1 >12000 K
75 % 242.630 cd/m2 0.169 cd/m2 1436 : 1 >12000 K
50 % 164.420 cd/m2 0.116 cd/m2 1417 : 1 >12000 K
25 % 89.386 cd/m2 0.063 cd/m2 1419 : 1 >12000 K
0 % 10.398 cd/m2 0.007 cd/m2 1485 : 1 >12000 K
When the luminance is measured on a single frame that shows 50% white and 50% black, we get a maximum white luminance of 314 cd/m2. That level is far from the 450 nits specified by the manufacturer. The black luminance is average for a mid-range smartphone, hence, the contrast ratio is within an acceptable range of 1450:1, which is slightly higher than the specified one. However, with a brightness that's not so impressive, you might have a hard time comfortably viewing content on the outside under direct sunlight. The temperature of the white point is extremely high - more than 12000 K, making the white look purplish.

Two separate black and white frames

Brightness White luminance Black luminance Contrast Color temperature
100 % 377.162 cd/m2 0.107 cd/m2 3525 : 1 >12000 K
75 % 292.166 cd/m2 0.082 cd/m2 3563 : 1 >12000 K
50 % 200.560 cd/m2 0.055 cd/m2 3647 : 1 >12000 K
25 % 110.388 cd/m2 0.030 cd/m2 3680 : 1 >12000 K
0 % 13.341 cd/m2 0.000 cd/m2 - >12000 K
When we measured the white and black luminance values on a fully white and a fully black display, we got higher white luminance values at all brightness levels. The maximum brightness in this occasion measures 377 cd/m2 and the white luminance is higher than the one from the previous measurements at all brightness levels. At the same time, the black luminance values are significantly lower, hence the contrast ratio is very high - from 3500:1 to 3600:1. The temperature of the white point remains unchanged - higher than 12000 K.
Peak brightness (100% APL)
Oukitel WP2
406.155 cd/m2
Oukitel K8
401.167 cd/m2
Blackview BV7000 Pro
393.042 cd/m2
Elephone P8 (2017)
390 cd/m2
UMi Touch
386.54 cd/m2
Vernee Apollo
382.946 cd/m2
Xiaomi Redmi Note 4 16GB
381.816 cd/m2
Elephone U
381.74 cd/m2
Samsung Galaxy S9 Exynos
379.31 cd/m2
Samsung Galaxy S9+ Exynos
378.355 cd/m2
Cubot King Kong 3
377.162 cd/m2
THL T7
369.9 cd/m2
Oukitel K7000
367.677 cd/m2
Ulefone T1
367.213 cd/m2
Oukitel K4000 Plus
359.685 cd/m2
Meizu Pro 6
359.682 cd/m2
Ulefone Future
356.372 cd/m2
Doogee Mix
354.655 cd/m2
Oukitel K4000 Pro
352.7 cd/m2
Elephone U Pro
351.963 cd/m2
ZTE Axon 7
350.421 cd/m2
The CIE diagram unveils almost 100% coverage of the sRGB colour space but it is far from 90% NTSC as specified by the manufacturer. The display panel has a traditional vertical striped RGB subpixel arrangement.

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