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PC hardware forum: need video card that has keystone for home made CRT project

by: b carras April 9, 2007 12:31 PM PDT

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need video card that has keystone for home made CRT project

by b carras - 4/9/07 12:31 PM

made a neat little HD CRT projector out of 2004 JVC 65in RPTV . looks awsome but the bottom of picture is right on the floor. when i raise it up 6 inches i get excessive keystone , can put a slant on the screen and it comes back into square but would like to find a video card that has keystone and a DVI . have done several of these conversions over the years and have not found any else doing these, any body else done any of these ? email me for pics sbcarras@comcast.net


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keystone correction is a function of the monitor...

by ramarc - 4/10/07 8:45 AM

In Reply to: need video card that has keystone for home made CRT project by b carras

not the video card. you'd either need custom software to send a distorted image or some circutry in your "monitor" to adjust the image.


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any low cost way to keystone DVI or HD component ?

by b carras - 4/11/07 9:57 AM

In Reply to: keystone correction is a function of the monitor... by ramarc

there are video scaler correction engines out there that would do the job , like Silicon Graphics Optix Image Any place. but at 3K its not affordable .looking any low cost under $500 ? was thinking maybe someone in CNET was aware of studio processer type card that would do the trick. pretty much understand how monitors and video cards work and I already have processor with Keystone adjustment for VGA output now but this CRT projector has DVI or HD component inputs any DVI stuff out there? i Know its long shot


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Tilt one or the other

by linkit - 4/10/07 9:39 AM

In Reply to: need video card that has keystone for home made CRT project by b carras

If I understand you correctly, you modified your RPTV, and you don't want to tilt your target screen to correct the keystone effect. The alternative is to tilt the projector. If you can raise the projector 6 inches, why not also tilt the projector enough to correct the keystone effect? If a tilted RPTV looks too silly, see if you can further modify the RPTV by tilting the projection assembly within the RPTV enclosure.


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