Acer gd245hq sync ghost issue Top of screen out of sync which causes ghosting
Hi
I have a new acer gd245hq monitor and have discovered that the screen is ghosting at the top and gradually decreases the further you go down the screen. I understand that the monitor refreshes from top to bottom and that it has a delay in doing that. Shouldn't the drivers take this into account? At least there should be a delay/offset for the glasses so that you can make it so that the 3d delay is centered in the middle of the screen.
It's not an issue of ghosting due to high contrast area, it is completely due to the timing of the monitor and the glasses being timed so that the bottom of the screen is in true 3d. It's quite distracting and takes away from the experience.
By the way, I'm using windows XP 64, and a quadro FX 370 card with 197.90 drivers and latest usb driver. At this point, I'd be happy with a delay/offset in the glasses through the driver!
I have a new acer gd245hq monitor and have discovered that the screen is ghosting at the top and gradually decreases the further you go down the screen. I understand that the monitor refreshes from top to bottom and that it has a delay in doing that. Shouldn't the drivers take this into account? At least there should be a delay/offset for the glasses so that you can make it so that the 3d delay is centered in the middle of the screen.
It's not an issue of ghosting due to high contrast area, it is completely due to the timing of the monitor and the glasses being timed so that the bottom of the screen is in true 3d. It's quite distracting and takes away from the experience.
By the way, I'm using windows XP 64, and a quadro FX 370 card with 197.90 drivers and latest usb driver. At this point, I'd be happy with a delay/offset in the glasses through the driver!
For the top ghosting you are absolutely right, however we don't have an option to control the timing of the glasses, so we can only rely on Nvidia doing some optimizations to resolve this issue.
But for the reducing the ghosting on the rest of the screen you can try this: [url="http://3dvision-blog.com/reducing-the-ghosting-on-acer-gd245hq-gd235hz-120hz-monitors/"]http://3dvision-blog.com/reducing-the-ghos...120hz-monitors/[/url]
For the top ghosting you are absolutely right, however we don't have an option to control the timing of the glasses, so we can only rely on Nvidia doing some optimizations to resolve this issue.
Do different drivers have diffrerent timings for the monitors? In another thread, andrew the nvidia guy said that v1.18 of the cd would work with the acer gd245hq but v1.19 would not. I would love to be able to try, but as i have a quadro, I'm limited to using qquadro drivers. They do work, but there aren't any quadro drivers that specifically mention the acer display so I don't know if it would make any difference.
Does anyone have any idea about if the driver version makes a diffrence to the glasses sync?
Do different drivers have diffrerent timings for the monitors? In another thread, andrew the nvidia guy said that v1.18 of the cd would work with the acer gd245hq but v1.19 would not. I would love to be able to try, but as i have a quadro, I'm limited to using qquadro drivers. They do work, but there aren't any quadro drivers that specifically mention the acer display so I don't know if it would make any difference.
Does anyone have any idea about if the driver version makes a diffrence to the glasses sync?
One issue that I had thought of is that if nvidia did include an option in the driver to offset/delay the glasses shutter sync to get the middle of the screen to be the 'sync centre', then the top half of the monitor would be from one frame, while the bottom half of the monitor would be from the next/previous frame9dpending on the direction of the sync offset). This might introduce some teraing effect. But at 120hz, it might be minimal and still preferable to the current situation of top of monitor 100% seeing both L/R images.
One idea would be to have an ffdshow filter that removed crosstalk from one image to the other (that affects the image 100% at top and linearly gets less strong down the image) that we could use with sterecopic player. I'm using nuke to do sterescopic compositing, so when using that I can simply do it in the program before final output. I'll do some tests tonight and provide feedback.
One issue that I had thought of is that if nvidia did include an option in the driver to offset/delay the glasses shutter sync to get the middle of the screen to be the 'sync centre', then the top half of the monitor would be from one frame, while the bottom half of the monitor would be from the next/previous frame9dpending on the direction of the sync offset). This might introduce some teraing effect. But at 120hz, it might be minimal and still preferable to the current situation of top of monitor 100% seeing both L/R images.
One idea would be to have an ffdshow filter that removed crosstalk from one image to the other (that affects the image 100% at top and linearly gets less strong down the image) that we could use with sterecopic player. I'm using nuke to do sterescopic compositing, so when using that I can simply do it in the program before final output. I'll do some tests tonight and provide feedback.
I have the Acer, XP 32, quadro FX 3700 with 197.03 drivers. It works great but the key is to run at 100Hz - at 120Hz or with other versions of the driver, I would get the same problems you mention. I'm using true OpenGL quadbuffered stereo, not DirectX games.
I have the Acer, XP 32, quadro FX 3700 with 197.03 drivers. It works great but the key is to run at 100Hz - at 120Hz or with other versions of the driver, I would get the same problems you mention. I'm using true OpenGL quadbuffered stereo, not DirectX games.
I have a new acer gd245hq monitor and have discovered that the screen is ghosting at the top and gradually decreases the further you go down the screen. I understand that the monitor refreshes from top to bottom and that it has a delay in doing that. Shouldn't the drivers take this into account? At least there should be a delay/offset for the glasses so that you can make it so that the 3d delay is centered in the middle of the screen.
It's not an issue of ghosting due to high contrast area, it is completely due to the timing of the monitor and the glasses being timed so that the bottom of the screen is in true 3d. It's quite distracting and takes away from the experience.
By the way, I'm using windows XP 64, and a quadro FX 370 card with 197.90 drivers and latest usb driver. At this point, I'd be happy with a delay/offset in the glasses through the driver!
I have a new acer gd245hq monitor and have discovered that the screen is ghosting at the top and gradually decreases the further you go down the screen. I understand that the monitor refreshes from top to bottom and that it has a delay in doing that. Shouldn't the drivers take this into account? At least there should be a delay/offset for the glasses so that you can make it so that the 3d delay is centered in the middle of the screen.
It's not an issue of ghosting due to high contrast area, it is completely due to the timing of the monitor and the glasses being timed so that the bottom of the screen is in true 3d. It's quite distracting and takes away from the experience.
By the way, I'm using windows XP 64, and a quadro FX 370 card with 197.90 drivers and latest usb driver. At this point, I'd be happy with a delay/offset in the glasses through the driver!
But for the reducing the ghosting on the rest of the screen you can try this: [url="http://3dvision-blog.com/reducing-the-ghosting-on-acer-gd245hq-gd235hz-120hz-monitors/"]http://3dvision-blog.com/reducing-the-ghos...120hz-monitors/[/url]
But for the reducing the ghosting on the rest of the screen you can try this: http://3dvision-blog.com/reducing-the-ghos...120hz-monitors/
My 3D Vision Blog - 3dvision-blog.com
Does anyone have any idea about if the driver version makes a diffrence to the glasses sync?
Does anyone have any idea about if the driver version makes a diffrence to the glasses sync?
My 3D Vision Blog - 3dvision-blog.com
One idea would be to have an ffdshow filter that removed crosstalk from one image to the other (that affects the image 100% at top and linearly gets less strong down the image) that we could use with sterecopic player. I'm using nuke to do sterescopic compositing, so when using that I can simply do it in the program before final output. I'll do some tests tonight and provide feedback.
One idea would be to have an ffdshow filter that removed crosstalk from one image to the other (that affects the image 100% at top and linearly gets less strong down the image) that we could use with sterecopic player. I'm using nuke to do sterescopic compositing, so when using that I can simply do it in the program before final output. I'll do some tests tonight and provide feedback.