3D Vision Blog

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

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The 3D Vision IR Transmitter – Up Close and Personal

June 18th, 2009 · 3 Comments · GeForce 3D Vision

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Here comes the black box a.k.a. the IR transmitter that is the other major part of GeForce 3D Vision. This small black box allows you to start and stop the 3D Stereo mode by just pressing the front button with nVidia’s logo on it. This device sends an infrared signal to the glasses that is being used to synchronize the image displayed on the screen and the shutters of the glasses so that each eye sees just half of the frames displayed on the monitor.


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On the back side of the transmitter you’ll find a mini USB connector that is used to connect the device to the computer, along with the scroll wheel used to set the level of depth when you tun on a 3D stereo mode. The scroll wheel is very convenient, because you can change the depth in every 3D application when you turn the 3D Stereo mode in real time. The level of depth is also controllable from the Stereo Drivers, but you need to go to the control panel of the video drivers in order to be able to modify it (the default value is 15%).
The connector on the right you see is only needed for synchronization when using a compatible DLP TV set as a display in combination with GeForce 3D Vision.


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And now for the fun part. The image above is shot in infrared mode and thus the camera actually sees below the normally visible as black external surface of the transmitter. This is possible, because the cover of the transmitter has been made from a special type of plastic that blocks only visible light (appearing black in color), but at the same time passes all infrared (IR) light. This is done, because the transmitter sends infrared signals to the glasses and this type of light rays needs to pass through the external walls of the device. And all the bright lights you see inside the transmitter are actually infrared LEDs that are used to send the synchronization signal to the glasses. As you can see they are placed all over the inside of the transmitter which is needed to provide the best “connection” between the glasses and the transmitter, because infrared light transmission requires direct line of sight. With this design you don’t need to place the transmitter in a special location to get the best results, you can simply place it somewhere around the monitor and everything should be fine. Just be wary of some other devices transmitting infrared signals that may be active around you and the computer, because that might bring some interferences and break the synchronization of the glasses and the transmitter.

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The 3D Vision Glasses – Up Close and Personal

June 17th, 2009 · No Comments · GeForce 3D Vision

The wireless shutter glasses are just one part of the Geforce 3D Vision, the other major part is a small USB powered “black box” or with other and IR sender box that is used to synchronize the flicker of the glasses with the image available on the screen. What nVidia did very well is designing their shutter glasses without any annoying cables and to actually look cool, especially compared for instance to eDimensional’s solution and other LC-shutter glasses previously made available during the era of the CRT displays.

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Besides looking way cooler than before and very similar to normal sunglasses (of course there is more to be done) the glasses are simple and straightforward for usage. You should also note that the “screens” or better described as shutters in front of each eye that are built into the glasses are wider giving you better peripheral vision and making them easier to for wide screen displays such as the 22″ Samsung and ViewSonic available as a bundle with the glasses. You can notice on the right side of the glasses (right in the picture above) the infrared receiver that gets the synchronization signal from the transmitter. And because an infrared signal (part of the light spectrum, normally invisible to the human eye) is being used there is a need for direct line of sight between the receiver and the transmitter. But that isn’t a big problem, because the transmitter box is well enough designed to provide that signal in every possible position and configuration as you’ll see later on…

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Looking at the glasses from above you can notice that there is a button and a small LED light indicating the status of the glasses (the right part of the glasses on the picture above). You just need to press the button when you want to use the glasses so that they can be turned on, there is no need to turn them off and you cannot do that by pressing the button again. If the glasses loose the synchronization signal from the transmitter for some time they should turn off automatically to preserve the battery that is being used to power them.

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Flipping the glasses on the other side you see the bottom part (the right side from the previous picture is now on the left). Here, just below the power button is a mini USB connector that is being used to charge the internal lithium-ion battery that powers the 3D Vision glasses. And between the charging USB connector and the power on button is the rechargeable battery that provides about 30 to 40 hours use of the glasses on a single charge. The last part of the glasses that you should be aware of is the interchangeable rubber padding that touches your nose when you are wearing the glasses so that they feel comfortable even when wearing them continuously for a few hours. You have three different sizes to choose from so that you can try and see which one fits you best and feels comfortable, but have in mind that the one that best suits you might not be very comfortable to someone else. So if you give the glasses to someone else to try them you might as well offer him to change the rubber padding so that they are relay comfortable, if there is a need to…

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