TECH2

As I discussed in my review of the HTC One, the hardware is generally quite impressive. From the big 4.7-inch 1080p screen to the surprisingly good built-in speakers, it's every bit the high-end phone it claims to be.

We put it through our normal series of bench tests, just like it was a TV, amp, or set of speakers. Video measurements are below. Audio measurements are on page 2.

So how good is it, really?

Video

There are no picture modes, or, in fact, any picture adjustments at all other than a backlight control. So in its "on" mode, the HTC One measures fairly cool with dark images (8088 kelvin), and warmer, but still cool (7364 K), with brighter images. It averages 7635 K across the grayscale range. 

Color points are impressively accurate. The primary colors (red, green, and blue) are all pretty much spot on. Yellow is good, but the other secondaries are a little off. Both cyan and magenta are somewhat blueish. Gamut luminance levels are all close to accurate as well. In all, its better than many HDTVs for color accuracy.

Gamma is 2.29, which is in line with many televisions. 

With the Brightness control set at max, the HTC One produces 150 footlamberts with a 100% white image, and 0.173 with a 0% black image, for a contrast ratio of 867:1. With the Brightness control set to minimum, these numbers are 2.843 and 0.0026, for a contrast ratio of 1,094:1. 

Impressively, the HTC One can actually resolve a 1 pixel on/off 1080p pattern, though you really have to stick your nose to the screen to be able to tell. It's doesn't seem to have any overscan.

HTC One screen measurements by Geoff Morrison