how would i power this lcd?

[hellzdev]

well im new here and i took apart a lexmark P6250 printer just for the lcd and i was wondering how would i power it through USB or LPT heres some pics of the lcd, board etc..

http://file012a.bebo.com/11/large/2007/08/04/20/2853379705a5183122998l.jpg

http://file012a.bebo.com/11/large/2007/08/04/20/2853379705a5183123069l.jpg

http://file012a.bebo.com/11/large/2007/08/04/20/2853379705a5183123158l.jpg

http://file012a.bebo.com/11/large/2007/08/04/20/2853379705a5183123276l.jpg

the circuit board below powered everything in the printer but i dont want the bulky thing in my case..

http://file012a.bebo.com/11/large/2007/08/04/20/2853379705a5183123350l.jpg

[Spawn-Inc]

http://file012a.bebo.com/11/large/2007/08/04/20/2853379705a5183122998l.jpg

see the two white wires(white and pink)? that powers the light in the lcd to make it visible to us. and the ribbon cable is for the information it displays. as for a power hook up i'm not to sure. i'm not sure if the ribbin cable is enough to move the crystals by itself and all it need is the light to see the information or if it has the light, ribbon cable and a power source. so if all it needs is the light to see whats on the lcd screen then it thats all you need to power.

[hellzdev]

hmm i just tryed hooking up the pink and white wires to a usb cable and it didnt work also switched them around but still no difference :(

[Redundant]

From what I can see in the pics, this LCD uses a CCFL for a backlight. (I found this a bit odd because most small LCDs use LEDs.) I can't tell from the circuit board with the ribbon cable if the inverter is on that. If it is, you just need to find the power input for the inverter to light it up (they usually use 12v).

As for making the LCD display stuff, because the covering on the circuit board on the first pic and the angle of the second, I can't tell if the signal from the printer is turned into RGB or something similar. If the signal from the printer chip is sent directly to the printer without a separate video chip you'll have a very hard time making it display anything.

If you can get some better pics of the board with the ribbon cable, I might be able to tell you more.

[hellzdev]

just de soldered that silver thing covering the board heres a pic of the board and close up of the ribbon from the lcd

http://file011a.bebo.com/0/large/2007/08/04/22/2853379705a5184050561l.jpg

http://file032a.bebo.com/10/large/2007/08/04/22/2853379705a5184065395l.jpg

btw there was a ribbon cable coming from the printer i think that was displaying the info not sure and a control board but that not important as i wont be using the buttons

[hellzdev]

any ideas?

[lukeisthecoolest]

how do u plan on hooking this up to your comp without a VGA?

[elbarto241]

or DVI or RGA plugs for that matter? i dont see how this LCD can be hooked up as a monitor with out some SERIOUS hardware and software work....

im sorry to say, but from my end it seems like an impossible task. but then again nothing is impossible :D

[hellzdev]

well when i get a gfx card i was thinking of plugging my main monitor into that then find out how to solder a vga cable to this lcd board and plug it into the onboard vga port but i might just get a PSone lcd instead looks alot easier and less hassle:)

[elbarto241]

i dont know much about electronics but pluging things together all willynillie probably aint such a good idea >.< you might damage your card and that little LCD. its much safer to get a PSone LCD. i have actually, thinking of selling it. PM me and make me an offer :D

[Redundant]

Not on here often anymore, sorry for the wait.

As the others have said, you most likely won't be getting this to work on VGA.
From the pics, what I had thought was the controller card is just the inverter for the CCFL. It seems the LCD controller is built into the circuit board for the printer. :(

You might be able to use the CCFL if you take it out of the LCD. (If you do try to power it, put that metal cover for the inverter back on so as not to shock yourself and putting the CCFL in a plastic tube will prevent breakage.)

[danthegeek]

Its always easier just to use a ps one lcd because it has been done and there are good tutorials online. Trying to figure this lcd out is going to be more hten difficult. Actually, it will probably be down right impossible unless you can find some good schematics and are brilliant with a soldering iron.

[Mysteriphys]

ya, one thing no one really said is if the ccfl doesn't light up it's because the inverter isn't being powered, the ccfl runs on alot of voltage, in some cases up to 1000v or more, this one probly runs around 400-500 depending on how good the resolution on it is, I've been looking at the ever deepening pit of horrid laptop lcd adaptation and it's not looking good, the best info I found for a DIy was in french, and the parts to buy run anywhere from 200-400 bucks, I'm still going to mess with it, but this one is going to be a rough ride considering I doubt anyone even makes a controller for adapting it.

so to answer your question, as far as getting it lit up, you'd have to find a wiring schem to tell you where your low voltage input needs to go in for the inverter.

when it comes to the actual display of info, you actually can find some software out there to communicate with 2 channels if the ribbon ( or controller wherever your main inputs are) and get it to display minimal stuff such as temps and whatnot, but once again, that would take a good bit of work around in the software let alone finding out which inputs you would use for power to the crystal movement and which for the information management.