ViewSonic VX2452mh 24-in. Gaming Monitor - Contrast Ration and Uniformity

Article Index
ViewSonic VX2452mh 24-in. Gaming Monitor
Closer Look
Features and Specifications
Testing Methods and Testing
Contrast Ration and Uniformity
Testing Continued

Contrast Ratio & Uniformity:

With the display now showing “perfect” color and brightness, we continue on to take our contrast readings. We used our luminance meter for our traditional contrast readings as indicated below.

 Black Spot
White Spot
Contrast Ratio
0.25 221.6 886.4


I realize that the maximum luminance could have been a bit higher, but when we test LCDs we make sure that they are calibrated properly and then give you the results that you will see when using them - not the maximum "theoretical" numbers.  After we finished with our luminance meter, we also used the Datacolor Spyder with the latest software update to perform contrast readings as various brightness levels.

Contrast Ratio Scale


We used the updated Spyder software to get a lighting uniformity reading at different brightness levels. The software and hardware combination takes readings at different brightness levels at different places on the screen to blend together results. It's interesting to see how different brightness levels on the monitor yield much different uniformity results. Please note the uniformity and brightness levels below.

Luminance Uniformity @ 50%
Luminance Uniformity @ 50%

Luminance Uniformity @ 67%
Luminance Uniformity @ 67%


Luminance Uniformity @ 83%
Luminance Uniformity @ 83%

Luminance Uniformity @ 100%
Luminance Uniformity @ 100%


As you can see the backlight drops off in certain areas of the display, and dips as low as 77% of the brightest point.  That is a little bit more than we’d like to see on any display and while you don’t notice it when using desktop applications that much, there are times when gaming that I couldn’t see all the details in the shadows that I knew where there. Once I enabled “Game Mode” it brightened up the display, but that doesn’t change the uniformity as you can see in the image above with the brightness set at 100%. That being said, you don't notice that much difference with your eyes. While some edges do seem to not be as bright, it's not widely noticeable. Still, it measures 23%.
On the last page we'll cover some real-world applications and see how it holds up playing movies as well as day-to-day tasks before we wrap things up.