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Video LCD FAQ

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FLECOM

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Displays using TV out

Q: what are my other LCD options? I don't want to plonk down that kind of cash.

A: Somewhat less expensive is to use an with NTSC video input (like these mobile video units), and drive it with a vid card that has a TV out. This is the approach used by widefault with his LCD mods. You can read more at his site as well as in various threads on this forum.


Q: I'd like to get something working on a color LCD for under a hundred bucks. What are my options?
A: Parts Express has a nice one for under $100
This 4" CCF backlit display runs from 12V (@ 500 mA), has composite video input (so you need a vidcard with a TV out)

EIO deals in overstock LCDs and occasionally has usable color units for around $100, but you need to check their site fairly often. Timeline also has cheap LCD displays on a sporadic basis, however many do not have a controller, and won't be easy to interface with your PC. Serious hackers only.


Q: What are my color LCD options above a hundred bucks?
A: PartsExpress
EarthLCD has NTSC displays
EarthLCD has VGA (and better) kits with a PCI or ISA controller.
Various other electronics houses carry LCD displays for mobile video applications.


Q: Will one of these NTSC displays look as good as a VGA LCD monitor?
A: No. But it can certainly look good.


Q: What do you mean by NTSC video?
A: NTSC stands
for National Television System Committee. For purposes of driving a display, NTSC (or composite) video is the signal fed from a video source using an RCA connector.
The NTSC standard has a fixed vertical resolution of 525 horizontal lines stacked on top of each other, with varying amounts of "lines" making up the horizontal resolution, depending on the electronics and formats involved. There are 59.94 fields displayed per second. A field is a set of even lines, or odd lines. The odd and even fields are displayed sequentially, thus interlacing the full frame. One full frame, therefore, is made of two interlaced fields, and is displayed about every 1/30 of a second.


Q: What about other screens with video formats like PAL?

A: Cheap NTSC screens have been mentioned already. For users in many parts of the world, you are more likely to find PAL screens. These will also work just fine. Your graphics card should have options for selecting NTSC or PAL output when configuring the TV out.
An example of such a screen available in the UK is:
http://www.maplin.co.uk/products/module.asp?CartID=040411153708643&moduleno=25951

Q) Can I run a Console AV input TFT screen directly from the VGA port?

A) Yes, it appears so, at least with PSone screen. Although I have a suspicion that a lot AV input screen will use similar industry standard components, and the biggest hurdle will be finding the exact pinout used if it differs from the PSone screen.

You have to bring the horizontal refresh rate down to 15kHz (normal VGA outputs 31kHz+), you can do this with PowerStrip and if your video card lets you.

I did this with a GameVue PS1 LCD and mt GeForce 4 4200, it still looked kinda crappy... could just be that my gamevue was all screwed up from applying the wrong voltage :eek:

Q) What about the PSx/PS1 etc LCDs?

A) Bit-Tech.net made a good writeup here http://www.bit-tech.net/article/136/
 
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