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Author Topic: Question regarding those 15khz LCD CRT replacement monitors  (Read 208 times)

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Epyx

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Question regarding those 15khz LCD CRT replacement monitors
« on: November 02, 2017, 10:03:49 pm »
Just curious how those 15khz LCD replacement monitors work.  I imagine they have a standard resolution of maybe 1600x1200 if 4:3 or 1920x1080 if 16:9. I am curious how the 15khz CGA modes work on those...does it pair up pixels to do those lower CGA resolutions?  Just trying to understand how 15khz would look better than standard LCD if its not a CRT? Hope that makes sense?
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buttersoft

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Re: Question regarding those 15khz LCD CRT replacement monitors
« Reply #1 on: November 06, 2017, 01:03:18 am »
It would look like ---steaming pile of meadow muffin---, i reckon.  LCD, being fixed-pixel, and much higer res than a 15kHz CRT, will benefit from shaders and HLSL stuff.

A 15kHz LCD would just take the 15kHz signal and upscale it, and it wouldn't do it well. Unless you're talking about a specialty product?

Epyx

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Re: Question regarding those 15khz LCD CRT replacement monitors
« Reply #2 on: November 13, 2017, 04:14:17 pm »
THanks. Im talking about the replacement monitors that the arcade monitor companies are touting. IE Wells Gardner and others generally have LCD replacements for failing CRTs and they advertise these as being 15khz. So just curious how that picture would differ from a regular LCD monitor?
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buttersoft

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Re: Question regarding those 15khz LCD CRT replacement monitors
« Reply #3 on: November 13, 2017, 06:42:56 pm »
Well, as above, if it's no more than a regular LCD that can upscale a 15kHz signal it'll look like ass. Even if it's 4:3. Think of a 640x480 signal going to a modern LCD - it looks shocking. I have a 15kHz capable Dell panel, which will do 480i, keeping the flicker. A 320x240 signal *might* be slightly better, but i haven't bothered trying as the picture is awful as it stands.

The panels would need good upscaling features to look any good, and i don't see that being cheap, and thus i can't imagine they have any. This is what external scalers do well.

That said, can you post a link to the panels you're talking about? They might have some ability to deal with the higher voltages put out by a jamma board as well.

  
 

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