We put the Ultra Xiaomi 15 through our rigorous DXOMark Display test suite to measure its performance on four criteria. In these test results, we will break down the way it went to a variety of tests and several cases of common use.
Panoramic
Keys display specifications
- 6.73 inches AMOLED
- Dimensions: 161.3 x 75.3 x 9.35 mm (black and white); 161.3 x 75.3 x 9.35 mm (Chrome)
- Resolution: 1440 x 3200 pixels, (~ 521 PPI density)
- Properties: 20: 9
- Find updating: 120 Hz
Pros
- Good readability outdoors and in low light conditions
- Movement of low color if displayed by a corner
- Good touch experience with low latency, good smoothness and precision.
Against
- Under sunlight, unnatural contrast to images
- It lacks brightness when watching HDR10 videos in low light and internal conditions
Xiaomi 15 Ultra offered a strong performance for an ultra-premium device which provides a balanced experience among all technical attributes, in particular in contact reactivity. In addition to occasional unintentional touches, the device has shown excellent precision, fluidity and reactivity.
Ultra’s 15 readability performance showed a significant improvement compared to the 14 ultra, mainly due to a much higher peak brightness, which has been measured at 3,065 nit compared to the 1,356 nit of 14 ultra. In February 2025, Xiaomi 15 Ultra is the brightest device tested in the database. However, its contrast to sunlight has not been managed better than that of Xiaomi 14 Ultra and the screen showed much less details than the Samsung Galaxy S25 Ultra. The frequency of modulation of the width of Xiaomi 15 Ultra (PWM) impulses, advertised at 4,320 Hz, indicates that the display of the display is very well managed, contributing to a more comfortable viewing experience.
The video performances were generally good, but the device was missing from sufficient brightness in low light and internal conditions, making it less comfortable for prolonged vision.
Test summary
DXOMark display test information: For the score and analysis, a device undergoes a series of objective and perceptive tests in controlled laboratory conditions and real life. The Dxomark Display score takes into account the overall user experience provided by the screen, considering the hardware capacity and the software developed. In the tests, only video apps and photos installed in the factory are used. More in -depth details on how Dxomark tests are available in the article “A more attentive look at DXOMark display tests”.
The following section focuses on the key elements of our tests and exhaustive analysis performed in the DXOMark workshops. Complete relationships with detailed performance assessments are available on request. To order a copy, contact us.
As is composed as the readability score of the display
Readability evaluates the ease and comfort of the user to view content, such as photos or a web page, on the display under different lighting conditions. Our measurements performed in the workshops are completed through perceptual tests and analysis.
Rendering of the skin tone in an internal environment (1000 lux)
From left to right: Xiaomi 15 Ultra, Samsung Galaxy S25 Ultra, Apple iPhone 16 Pro Max, Honor Magic7 Pro
(Photo only for illustration)
Skin rendering in a sunlight (> 90,000 lux)
From left to right: Xiaomi 15 Ultra, Samsung Galaxy S25 Ultra, Apple iPhone 16 Pro Max, Honor Magic7 Pro
(Photo only for illustration)
Ski stands for the mirror component included, which measures both the widespread reflection and mirror reflection. The reflection of a simple glass sheet is about 4%, while reaching about 6% for a plastic sheet. Although the first surface of the smartphones is made of glass, their total reflection (without coating) is usually about 5% due to more reflections created by the optical stack complex.
The average reflectance is calculated on the basis of the spectral reflectance in the visible spectrum interval (see graphic graphic) and the human spectral sensitivity.
Uniformity
This graph shows the distribution of the luminance during the entire display panel. The uniformity is measured with a 20%gray motif, with brilliant green that indicates ideal luminance. A bright green color evenly scattered on the screen indicates that the brightness of the display is uniform. Other colors indicate a loss of uniformity.
View the flicker for 2 main reasons: update and modulation speed of the width of the impulse. Modulation of the width of the impulse is a modulation technique that generates variable width impulses to represent the breadth of an analog input signal. This measurement is important for comfort because low frequencies can be perceived by some individuals and, in the most extreme cases, can induce convulsions. Some experiments show that the discomfort may appear at a higher frequency. A high PWM frequency (> 1500 Hz) tends to be less disturbing for users.
How the display of the display color is composed
Color assessments are performed in different lighting conditions to see how well the device well manages the color with the surrounding environment. The devices are tested with SRGB image schemes and display-p3. Both faithful mode and default mode are used for our evaluation. Our measurements performed in the workshops are completed through perceptual tests and analysis.
The circadian action factor is a metric that defines how light affects the cycle of human sleep. It is the relationship between the energy of light that contributes to sleep disorders (centered around 450 Nm, which represents blue light) on the energy of light which contributes to our perception (which covers from 400 Nm to 700 Nm and centered on 550 Nm, which is green light). A high circadian action factor means that environmental light contains strong blue light energy and it is likely that it influences the body’s sleep cycle, while a low circadian action factor implies that light has a weak blue light energy and it is less likely to influence sleep models.
How it is composed how to view the video score
The video attribute evaluates the video handling of the standard dynamic range (DSD) and the dynamic range (HDR10) in internal and poor lighting conditions. Our measurements performed in the workshops are completed through perceptual tests and analysis.
Video rendering in an environment in low light conditions (0 lux)
Clockwise from the high left: Xiaomi 15 Ultra, Samsung Galaxy S25 Ultra, Apple iPhone 16 Pro Max, Honor Magic7 Pro
(Photo only for illustration)
These calibers have the percentage of irregularities of the frame in a 30 second video. These irregularities are not necessarily perceived by users (unless they are all in the same TimesTamp) but are a performance indicator.
How the display of the display touch is composed
We evaluate the touch attributes in many types of content in which the touch is the key and requires different behaviors such as the game (quick touch to the response time), web (regular scrolling of the page) and images (accurate navigation and regular from one image to another).
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