For those of you that are using PSOne type panels (small lcd monitors), would a line-doubler improve the picture quality? Or is it even necessary for our application? I sort of understand what they do, but can't figure out if that would be necessary for these panels that are different than the OHP panels. 
A line double is meant to increase the resolution of the picture. NTSC video signals come in at 320*240. The psone panel is 320*240. The main reason to line double is to take it up to a higher res. Like 640*480 most projection panels are.
I think the panel has to be physically capable of rendering that rez to be of use.
If it doesn't have that capacity (the doubler rez) it won't do any better with the doubler, because it is physically limited by its own rez. The doubler take's the incoming signal and approximate's a signal in between the successive scan line's and 'fill's'/renders that space through a formula calc'd in the doubler box. If the projector/tv doesn't have that rez the doubler is creating then it is wasted and will not increase the resolution.
At this rez (320x240) you probably wouldn't notice any increase because a typical RCA signal and possibly higher rez DVD/SVHS signal is already maxing it out to its limit. 320x240 is near the same rez as the NTSC signal (440 lines of resolution, PAL is 520?) put out through your banana/RCA jack "out". However, picture quality is increased in a DVD/SVHS signal and will give a nicer pic. But, the rez wouldn't be fully utilized with a panel of 320x240.
A 640x480 panel would benefit from a doubler, though. Because it's rez capabilities go above NTSC/RCA-DVD signals and would benefit from the line doubling...whew! Think I layed it out there fairly well.
I think there are also some issue's on scan frequency and if the panel is capable of locking on to the signal at that doubled frequency. If not the pic is severly distorted, if there at all.
that's the long explanation
If it doesn't have that capacity (the doubler rez) it won't do any better with the doubler, because it is physically limited by its own rez. The doubler take's the incoming signal and approximate's a signal in between the successive scan line's and 'fill's'/renders that space through a formula calc'd in the doubler box. If the projector/tv doesn't have that rez the doubler is creating then it is wasted and will not increase the resolution.
At this rez (320x240) you probably wouldn't notice any increase because a typical RCA signal and possibly higher rez DVD/SVHS signal is already maxing it out to its limit. 320x240 is near the same rez as the NTSC signal (440 lines of resolution, PAL is 520?) put out through your banana/RCA jack "out". However, picture quality is increased in a DVD/SVHS signal and will give a nicer pic. But, the rez wouldn't be fully utilized with a panel of 320x240.
A 640x480 panel would benefit from a doubler, though. Because it's rez capabilities go above NTSC/RCA-DVD signals and would benefit from the line doubling...whew! Think I layed it out there fairly well.
I think there are also some issue's on scan frequency and if the panel is capable of locking on to the signal at that doubled frequency. If not the pic is severly distorted, if there at all.
that's the long explanation
Thanks!
I was thinking that the resolution of these panels was higher than 320x240. I'll have to contact Tinker, he's using one of these Interact Monitors for the PSone and see what he thinks the resolution is. I was under the impression that it was a 640x480 panel. Soooo.....the line doubler can help IF the lcd panel can handle the increase in resolution. Jeez, I wish we could figure out the use of laptop panels....but it'll take someone on the forum other than me to figure it out! Thanks for your help, guys, I appreciate it.
I was thinking that the resolution of these panels was higher than 320x240. I'll have to contact Tinker, he's using one of these Interact Monitors for the PSone and see what he thinks the resolution is. I was under the impression that it was a 640x480 panel. Soooo.....the line doubler can help IF the lcd panel can handle the increase in resolution. Jeez, I wish we could figure out the use of laptop panels....but it'll take someone on the forum other than me to figure it out! Thanks for your help, guys, I appreciate it.
ps2 panels
Do we know what the resolution of the PS2, gamecube or xbox mobile monitors are? They are 5.6" and can take AV signals. Also any more on the PSone screens. Any recommendations as to the easiest to take apart?
Do we know what the resolution of the PS2, gamecube or xbox mobile monitors are? They are 5.6" and can take AV signals. Also any more on the PSone screens. Any recommendations as to the easiest to take apart?
PSone Resolution
Alchemist: I haven't been able to get an answer on this one yet. I've looked at a few different models in the store and all they say is "high resolution", same thing on their websites. I haven't tried calling them yet. I know that Tinker uses one of these with good luck and that he indicated that it wasn't too difficult to take apart (his model was the Interact brand), but he's projecting a 4 foot picture and I believe he indicated in one of his posts that you may get some screen door effect at greater distances/picture size. (Hope I'm quoting you right, Tinker 😀 ) I'd be interested if you can find out for sure on the resolution, they've got those Interact Monitors here locally for less than $100.
Alchemist: I haven't been able to get an answer on this one yet. I've looked at a few different models in the store and all they say is "high resolution", same thing on their websites. I haven't tried calling them yet. I know that Tinker uses one of these with good luck and that he indicated that it wasn't too difficult to take apart (his model was the Interact brand), but he's projecting a 4 foot picture and I believe he indicated in one of his posts that you may get some screen door effect at greater distances/picture size. (Hope I'm quoting you right, Tinker 😀 ) I'd be interested if you can find out for sure on the resolution, they've got those Interact Monitors here locally for less than $100.
Hi, I am new to this forum. I have been trying to figure out the best (and cheapest 🙂 LCD screen to use. I have not been able to figure out what resolution screen I need though.
From what I understand, DVD movies are at 720 x 480. But, NTSC runs nearly 1/2 that resolution (~320/240?). So when I output using the S-video jack, is the DVD player only sending images at low res?
If that is the case, I have seen relatively cheap 5" LCD screens that can are at that resolution and contain built in S-video jacks (for use in cars, etc).
If that is not the case, then I would have to buy a higher res LCD w/o builit in jacks for s-video and a signal converter to go from s-video to SVGA. (I am trying to build a stand-alone box w/o the use of a PC to convert signals).
Please let me know if I am mistaken in my understanding of this. Thanks.
From what I understand, DVD movies are at 720 x 480. But, NTSC runs nearly 1/2 that resolution (~320/240?). So when I output using the S-video jack, is the DVD player only sending images at low res?
If that is the case, I have seen relatively cheap 5" LCD screens that can are at that resolution and contain built in S-video jacks (for use in cars, etc).
If that is not the case, then I would have to buy a higher res LCD w/o builit in jacks for s-video and a signal converter to go from s-video to SVGA. (I am trying to build a stand-alone box w/o the use of a PC to convert signals).
Please let me know if I am mistaken in my understanding of this. Thanks.
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