Ulefone Power Armor 13 Review

Display

The Ulefone Power Armor 13 is fitted with a 6.67-inch IPS display with an FHD+ resolution (1080 x 2400 pixels). The manufacturer does not specify the model of the protective glass but indeed, it is treated with a fingerprint-resistant oleophobic coating which actually works very well. In addition, the display supports Glove Mode, which has to be turned on from the Intelligent Assistance menu in the System Settings. The detailed Display settings allow you to switch on/off the Dark Theme, Night Light (reading mode), adaptive brightness, choose font size and display size, manage the LED notification light, and the lock screen options, launcher settings, screen color mode, turn on/off the notch, etc. The maximum brightness of the display is 442.908 cd/m² measured on a fully white screen. Below you will find our usual measurements of the white and black luminance, static contrast ratio, and color temperature of the display taken twice - on a single frame that displays 50% white and 50% black and on two separate frames displaying a fully white and a fully black screen.

A single frame, 50% white / 50% black

Brightness	White luminance	Black luminance	Contrast	Color temperature
100 %	435.624 cd/m2	0.354 cd/m2	1231 : 1	11948 K
0 %	17.393 cd/m2	0.014 cd/m2	1242	11948 K

Two separate black and white frames

Brightness	White luminance	Black luminance	Contrast	Color temperature
100 %	442.908 cd/m2	0.340 cd/m2	1303 : 1	11242 K
0 %	17.691 cd/m2	0.354 cd/m2	1231 : 1	11948 K

Unlike the displays of most of the latest smartphones we've tested, the IPS screen of the Power Armor 13 behaves in a similar way during both types of measurements. Its white luminance on a 100% white screen and on a 50% white+50% black screen is around 440 cd/m². The black luminance on a 100% black screen and a 50/50 white-black screen is around 0.34-0.35 cd/m². Hence, the static contrast ratio from both types of measurements is around 1200:1/1300:1. The temperature of the white point is extremely high - just a tad below 12000 K, and does not change significantly in the different types of measurements.

Position	Left	Center	Right
Top	462.350 cd/m2 / 10460 K	473.823 cd/m2 / 10563 K	467.983 cd/m2 / 10516 K
Center	430.724 cd/m2 / 11030 K	446.334 cd/m2 / 10978 K	434.936 cd/m2 / 10867 K
Bottom	415.359 cd/m2 / >12000 K	433.577 cd/m2 / 11772 K	418.161 cd/m2 / 11732 K

Our brightness uniformity measurement shows that the display is not uniformly bright. The top one-third of the display is the brightest part. The middle one-third is the second-brightest. The bottom one-third is the least bright. The temperature of the white point follows an inverse proportion - it is the lowest in the top area (~10500 K), mid-level in the mid of the screen (~11000 K)., and the highest in the bottom area (~12000K). The CIE diagram shows a color space coverage that's slightly wider than 100% sRGB. The display panel has a traditional vertical striped RGB subpixel arrangement.