3D Vision Blog

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

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A Bit More on the Topic About Active DisplayPort to DVI Adapters

March 21st, 2011 · 4 Comments · General 3D News

Here is an interesting find that I’ve stumbled upon today, an Active DisplayPort to DVI adapter from Sapphire. The interesting thing here is that the adapter is Active, but does not have an additional USB power cable, but if you are paying enough attention you should note that this adapter is providing just a Single Link DVI output. The adapter is originally intended to be used with AMD/ATI video cards fro providing video connection to more common monitors that are not using DisplayPort if you want to built a multi-monitor configuration based on AMD’s EyeFinity technology. This adapter however is not something that will work with a 3D Full HD monitor if your desktop or laptop has only DisplayPort output with the reason being that the output is not the Dual-Link DVI that is required to be able to push 1920×1080 video at 120Hz to the monitor. So you should be paying attention when choosing a DisplayPort to DVI adapter for use with a 3D monitor, you should look for an Active DisplayPort or mini DisplayPort to Dual-Link DVI adapter in order to make things work with high-resolution stereo 3D…

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DisplayPort to Dual-Link DVI Adapter for External 3D Monitor on Laptop

February 3rd, 2011 · 8 Comments · Other S3D Tech

If you do have a powerful gaming laptop that does not yet have a built-in stereoscopic 3D display, they you might be able to connect an external 3D-capable LCD monitor to it and still play games in stereo 3D mode. In order to be able to do that your laptop will need to have a Dual-Link DVI video output and unfortunately not a lot of the newer gaming laptops do feature DVI connectors for external monitors. HDMI can be an option too, if you get some of the upcoming HDMI 1.4a stereo 3D-capable solutions, but you will be limited to the restrictions of 720p 50/60Hz 3D mode and the 1080p 24Hz 3D mode. But you may get another chance if your laptop also has a DisplayPort connector, however you will also need an active DisplayPort to Dual-Link DVI adapter.

However you should be careful when choosing a DisplayPort to DVI adapter, as there are different solutions that offer different capabilities. There are basically two types, a cheaper passive adapter that only supports Single Link DVI conversion that is not Ok for a Full HD 3D-capable monitor, the ones that you should look for is an active adapter that converts DisplayPort to Dual-Link DVI. The active DP to DL DVI adapters do need more power and thus they do have an additional USB connector that is needed also to be connected, but this also makes the adapter much more expensive than the passive Single-Link models. With all that said, getting a DisplayPort to Dual-Link DVI adapter does not guarantee you that everything will work as expected, although in theory it should be enough for you to be able to connect and use a 3D-capable monitor. So if you have already used one such adapter and can confirm if it works or not for connecting a 3D-capable display to your laptop. Currently there are no officially certified adapters that will guarantee that everything should work as expected when connecting a 3D monitor, but apparently Nvidia is considering to offer such adapters if there is interest in them. They have setup a poll in the official 3D Vision forum asking if users are interested in such adapters.

To see the poll in the Nvidia 3D Vision forum about a certified DP to DL DVI adapter…

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3D LCD Monitors Getting HDMI 1.4(a) Support, But is it All That Good?

November 7th, 2010 · 10 Comments · Other S3D Tech

We already know that the new wave of 3D-capable LCD monitors will get support for HDMI 1.4(a) as all currently available monitors that have HDMI input only use 1.3 version of the specification and that does not allow them to receive 3D content other than through the Dual-Link DVI. So getting new 3D LCD monitors available with HDMI 1.4(a) support sounds like a good thing as it will allow you to also connect consumer devices with 3D-capabilities that do use this industrial standard. However I’m getting a bad feeling about this, as some manufacturers might decide to go only for HDMI 1.4(a) and ditch the support for DVI at all, and that will not be a good thing at all…

Maybe the frame sequential mode that we are currently using to get Full HD resolution with 120Hz over the Dual-Link DVI interface is not the best choice and not widely supported as it is happening with the industry standard that is HDMI 1.4(a), but that should not mean to ditch it in favor of only supporting the HDMI for stereo 3D content. Just to remind that HDMI 1.4(a) is using frame packing and is limited to 1080p 24Hz 3D mode as well as 720p 50/60Hz 3D mode, so you will not be able to use the native 1080p resolution with 60 fps per eye like you can currently do over DL DVI. Supporting both DL DVI and the frame sequential mode as well as HDMI 1.4(a) and its frame packing method for sending stereo 3D content to a monitor might make it a bit more expensive, but is a much better choice than getting only HDMI 1.4(a) support. The support for the later one will also mean that you will not be able to use 120Hz refresh rate at all when not in stereo 3D mode, but instead will be limited to only 60Hz… and I’m sure you will not like to be further limited with a new monitor than you are with the current generation of 3D LCDs already available. I hope I’m wrong here, we might soon start seeing the next generation of 3D LCD monitors with HDMI 1.4(a) and no DVI connectors at all.

The release of the firs 3D-capable monitors with DisplayPort might be the resolution to the situation we are facing with getting HDMI-only 3D monitors, however DP is not yet that commonly available on video cards, so you might also need an adapter from DVI to DisplayPort. AMD gave us a hint about getting 3D-capable monitors with DisplayPort sometime in 2011 and their video cards in general have a DP than HDMI connector, but Nvidia is still focusing mostly on HDMI along the traditional DVI connectors. But talking about next generation of 3D-capable LCD monitors we should not forget that we also need better and with a faster response time LCD panels in order for the users to get better 3D experience and have less issues…

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