3D Vision Blog

A normal user's look into the world of 3D Stereo Technologies

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3D Vision Active Shutter Glasses and Monitor Color Reproduction

October 19th, 2011 · 2 Comments · GeForce 3D Vision

It is time for results of the interesting testing I’ve done on how the color reproduction of a 3D LCD monitor is affected in different refresh rates and modes – 2D and stereo 3D with the use of 3D Vision. I’ve used Acer GN245HQ 3D Vision ready 120Hz LCD monitor along with an X-rite colorimeter to measure the display characteristics, along with a lens from a pair of 3D Vision glasses to measure through. Notice how the color accuracy as well as the level of brightness changes with and without the 3D Vision lenses in different operational modes of the display, have in mind that the measurements were made directly through the lens with it being in inactive (open) state…





Starting with 60Hz refresh rate, measuring the default color reproduction of the monitor on top and through the 3D Vision glasses on the bottom. The situation isn’t very different, apart from the fact that the brightness gets reduced significantly and there is a bit more difference in the color temperature.





Moving to 120Hz refresh rate, a bit better results with color reproduction as compared to the 60Hz mode, obviously as the monitor is intended to be used with 120Hz refresh rate. Again higher color deviation through the lenses of the 3D Vision glasses, but the most important par here as well is the reduction of brightness with pretty much the same level as with the 60Hz refresh.





The results in 120Hz 3D mode are a bit different though. Even more reduction of the brightness and bigger color deviation, however there is one important thing here and that is the fact that in this mode each eye should be getting different image in 3D mode, so it is hard to exactly measure the results in such a mode, so it is possible that the color reproduction is better than what the calorimeter detects when using the full 120Hz refresh rate in 3D mode to display the same content.

Now, the next thing that immediately comes to my mind is what will happen if I do a color calibration of the display through the lenses of the 3D Vision glasses, how will this affect the monitor’s color reproduction visually and how the image will look without the glasses? Now, since color calibration does not affect the color reproduction in games when you play in full-screen stereo 3D mode you can only make the image look better when you are wearing the glasses and doing something on the desktop. Not that you would need a very accurate color reproduction in games as pretty much all of them were not designed with that in mind anyway. Surprisingly enough after calibrating the display through one of the lenses of the 3D Vision glasses visually the image on the display looked very nice visually when wearing the glasses, apart from the reduced brightness that is expected anyway. And when not wearing them the image on the screen also looks very nice visually, only the color temperature is more significantly off to the colder bluish levels.

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More About the Samsung 2233RZ 120Hz Monitor

June 25th, 2009 · 2 Comments · GeForce 3D Vision

samsung-2233rz-monitor


I’ve already written what are the official specifications of Samsung’s 2233RZ 120Hz display, but today I’ve decided to verify how good the display actually is when it is being used in 3D mode with GeForce 3D Vision. As I already showed you Samsung 2233RZ locks the brightness level at 100 and contrast at 75, so there are the settings I also used when testing the display.


cie-color-chart-srgb-coverage


The first big surprise came because of the very good coverage of the SRGB, something that you don’t normally expect to see from a TN monitor, so here Samsung 2233RZ performed great. The black point I measured at the above settings was also quite good, considering that the display is set at high level of brightness and the maximum brightness level of white was pretty close to the value Samsung rates their product. The black point was at 0,293 cd/m2 and the maximum measured brightness for white was 285 cd/m2 while Samsung it at 300 candles per square meter which is pretty close, especially having in mind that brightness is important for 3D Vision. The contrast ratio considering the above actual measured values was 973:1 which again is pretty close to the rating of 1000:1 provided by Samsung and in 3D mode we don’t care much about the dynamic contrast values…

Now, up until now the Samsung 2233RZ performs very well especially considering it is based on TN panel, but unfortunately when I tested it see how the display performs in terms of color reproduction I was a bit disappointed. Now, don’t get me wrong… the display is great and it performs very well, but it seems it needs a bit of color calibration to make it even better and after calibrating it, it actually does give even better results. Before doing a calibration the display has some problems sustaining constant gamma value over different brightness levels, the color temperature also cannot be sustained at a certain value and the blue color needs a some tweaking. After a good color calibration these can be fixed quite good and thus the image representation becomes better and maybe, just maybe this may reflect into better gaming experience when using the monitor with or without 3D Vision… ;)

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