lowest video frequency an lcd will accept?

deadduck · 18-03-2006 2:49pm #1

does anyone know? I'm using an AG Neovo and want to connect my gamecube but don't want to risk damaging the display? can i damage it by trying to display to low a frequency

hopeful · 18-03-2006 5:57pm

deadduck wrote:

does anyone know? I'm using an AG Neovo and want to connect my gamecube but don't want to risk damaging the display? can i damage it by trying to display to low a frequency

Do you mean frequency as in refresh rate or screen resolution? You LCD will most likely have a lower refresh rate of 59 or 60 hz. The resolution will depend on the monitor size but most, if not all, will go down to low resolution without difficulty. My 20" widescreen Philips has a native resolution of 1680x1050 but will scale down to 640x480 no problem. No LCD will show a higher resolution than its 'native' one.
E.G
15" LCD have 1024x768 max res
17" and most 19" LCD have 1280x1024 max res
20" LCD have 1600x1200 max res

Does any of this make sense?

I'd best go back to proper work before my boss catches me browsing Boards!

deadduck · 18-03-2006 10:59pm

i'm using a 19" lcd and want to input a 15hz signal. i'm not too well up on these things myself, just wanna make sure too low a frequency won't damage the lcd

astrofool · 19-03-2006 1:35am

input via what? the gamecube should be outputting at least 50/60 hz interlaced, which should be fine for the monitor.

deadduck · 19-03-2006 4:00pm

i'm gonna build an rgb to vga cable, but apparently, from what i've read, the rgb the gamecube outputs is at 15hz. i know what you mean about the 50 & 60 hz, but this topic keeps popping up on any hardware forum i've read. a lot was said about these http://www.lik-sang.com/list.php?nav=over&category=221& types of devices, but i don't understand why they have to be used, and don't want to spend 50 quid on something i don't need

zilog_jones · 19-03-2006 8:26pm

It's 15kHz, not 15Hz! That's the horizontal frequency (roughly) used by standard-definition TV video, as opposed to the vertical frequency (50 or 60Hz). Standard computer monitors typically only go as low as about 30kHz unless they're designed for TV signals as well - though god knows whether they'll accept TV signals through the VGA inputs...

deadduck · 19-03-2006 8:27pm

on further investigation, it seems 50 - 60 hz is the vertical frequency. the horizontal frequency is where i'm likely to have an issue

deadduck · 19-03-2006 8:33pm

ah... now it's making a bit more sense. if i connect it up do you reckon it will cause any damage, or just show a bad picture

hopeful · 19-03-2006 8:50pm

I did a bit of reading around. Seems you will need one of the VGA adapters available on the market to get a signal on your monitor.

HERE has a few from £30 upwards....maybe able to get cheaper on ebay?

FYI...Doubtful you could damage anything with a 'dodgy' signal....but if it is a pricey LCD I wouldn't chance it

lowest video frequency an lcd will accept?

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