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Sony SDM-X72

The specified characteristics of this display are quite good: 280nit brightness, 400:1 contrast ratio, 160 degrees viewing angles (both horizontal and vertical) and 30ms response time (10ms rise and 20ms fall – looks like the matrix from Samsung 172B, doesn’t it?).

The display is not as slim as its predecessor, because the case is rather bulky. The control buttons are placed on the side. They are rounded with an imprint in the center. The menu resembles the one of the previous model, but the quick access buttons are assigned new functions. Instead of brightness and contrast, they now control the volume of the integrated speakers and the ECO mode. This new operating mode, ECO, is enabled with a single press and reduces the brightness in a jump. It’s quite handy when you want to leave the computer for a while, so why waste the resources of the display?

The connectors deserve a closer look. First of all, there are three of them on the monitor: two VGA and one DVI connector. The first VGA and the DVI connectors are combined into the first input port of the display, and the second VGA is the second input port. We saw this two-input scheme in CRT-displays from Sony, now it just has a digital DVI input, natural for LCD-displays. You can switch between the inputs by pressing a button on the front panel. The enabled input is indicated by the LEDs.

Unfortunately, viewing angles had the same problems as in the previous display. When viewed from aside (at an angle of 60 degrees or more), the screen gets yellowish. When viewed from above or below, the image appears darker. Brightness was also far from perfection. For comfortable work I set 40% brightness and 50% contrast, but when I tried to raise brightness above 70%, the black color appeared gray.

Another unpleasant surprise can be seen in the oscillograms. Remember I said I was wrong guessing that the backlight lamp of this display flickers? Well, it doesn’t, but the whole screen does. Whatever brightness, the image was flickering at the refresh rate frequency (I checked this out with a few different refresh rate settings), and the amplitude of the flicker was 15% of the screen brightness, which is perceivable to the eye…

The measured response time was 10ms rise plus 22ms fall. It corresponds to the specified values absolutely.

Pixel rise time

Pixel fall time

 
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