DoubleSight DS-277W: Back to the Drawing Board
by Chris Heinonen on June 13, 2012 1:30 AM ESTSince all LCD displays have to be compared to a CRT display to calculate the lag, all of the testing is done at 1920x1080 resolution to keep the aspect ratio constant on the DS-277W. This might introduce a bit of an input delay, but because we use SMTT now to test displays we can separate input lag from pixel response to be more accurate.
Using SMTT, the DS-277W exhibited right around 21.3ms of input lag, and it took a full 29.3ms for a pixel to switch colors and come back, and combined this gives us an average response time of 36ms. This is over two frames of delay, so for many people this will not be an acceptable number for heavy gaming. Since the HP ZR2740w offers far faster pixel response time, and costs less to boot, that would be the 27” display I would still recommend with gaming in mind.
The DS-277W ships with an external power brick, and it seems to draw full current, all the time. At minimum brightness it was using 122 watts and at maximum it was drawing 125. Running at lower brightness to save on your energy bill isn’t a concern here, as the DS-277W is going to use a lot of power no matter how you have it setup.
I also tried to test out the DS-277W as a video display, since it has many inputs to use for this. Using an Oppo BDP-93 Blu-ray player, my first discovery was that in 1:1 mapping mode, it crops pixels from an HDMI signal. Losing 11 pixels on each side and 5 on the top and bottom, this is around 1% of overscan in effect, and there is really no reason for this at all. I did test using a PLUGE pattern from the Blu-ray player and found that the brightness control behaved the same over the HDMI input, controlling the black level as you’d expect on a TV.
Testing component didn’t even get that far. Once again using the Oppo player, which has a near perfect component video output, I couldn’t get an image on the screen at all. Using the Oppo BDP-83SE player instead also resulted in no image, so either the component video on my test LCD didn’t work correctly, or it didn’t like the timing of the Oppo players, or something else is just incorrect with the component video. Needless to say I wasn’t happy with the video testing results.
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