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Lumenlab > Audio Video Sciences > Projector Builder > DIY Video Projector Design
jokr004
Ok, does anyone know anything about the inputs on this? It's the LCD screen from an old Compaq laptop.


The stripped LCD screen

The input cable and a close up on the circut.

The input cable (end that goes into the panel)

The input cabel (end that goes into the motherboard)

I'm looking to just convert that one way or another into a VGA input, like the end of a normal monitor.
Any suggestions? I really don't want to have to buy an LCD monitor.
yoshuaspawn
Well thats a LVDS cable...
I dont think theres any way to just hook up a vga cable to it. You can try 'Digitalview', they have a soulution generator to match a controller to your LCD.
Or some mini motherboards offer universal LVDS compatiblity, eitherway you will end up spending what it would cost for an LCD monitor though sad.gif
joecnc2006
Using a Laptop LCD Screen is just not there yet, because laptops have the built in video driver board.

http://www.lumenlab.com/forums/index.php?s...ndpost&p=132274

joe
jokr004
QUOTE (yoshuaspawn @ Apr 1 2006, 11:34 PM) *
Well thats a LVDS cable...
I dont think theres any way to just hook up a vga cable to it. You can try 'Digitalview', they have a soulution generator to match a controller to your LCD.
Or some mini motherboards offer universal LVDS compatiblity, eitherway you will end up spending what it would cost for an LCD monitor though sad.gif

Well, I suppose that I could use the motherboard of the laptop for inputs. Then I guess I could just get a USB TV tuner.
joecnc2006
QUOTE (jokr004 @ Apr 2 2006, 12:49 PM) *
Well, I suppose that I could use the motherboard of the laptop for inputs. Then I guess I could just get a USB TV tuner.


You need a driver board for the lcd panel, tunner does not have a driver board a tunner is just for input, you have to have something to drive the lcd, its like having a computer without the motherboard, it just aint going to happen.
rufusdog
Is that from an armada M700?
Ferris Buehler
What Joe meant to say biggrin.gif is that there is a laptop screen you can use, there are 3 or so, a user here got a company to make the board needed for them to work. He is selling them (just the board now) and has a website for it. I'll try and find it later.

That right Joe? wink.gif

Edit here it is http://www.lumenlab.com/forums/index.php?showtopic=4203java script:ShowHide('qr_open','qr_closed');
Fast Reply
joecnc2006
QUOTE (Ferris Buehler @ Apr 2 2006, 03:57 PM) *
What Joe meant to say biggrin.gif is that there is a laptop screen you can use, there are 3 or so, a user here got a company to make the board needed for them to work. He is selling them (just the board now) and has a website for it. I'll try and find it later.

That right Joe? wink.gif

Edit here it is http://www.lumenlab.com/forums/index.php?showtopic=4203java script:ShowHide('qr_open','qr_closed');
Fast Reply


Well look at the date of that, almost a year ago, and they did not go over very well, and was lcd specific, And also way to expensive, you might as well just but the lcd monitor for almost 1/2 the price of that, thats the problem the controllors cost 250.00 and up.
maxer
hi there!

the connector on the figure is a lvds probably a 3 channel differential one.
i can ensure that there is no way to input rgb signals on motherboard to make that lcd run simply because the signal on the motherboard are digital ones Red (0-7) Blue(0-7) Green (0-7) and some other control signals like clock,enable etc etc....

I'm starting to design vga to lvds interface with the intention to add DVI to Lvds latter,as prices of those controllers sold in internet are too high and i can't afford one.

if i will have success i'll let know !!!

regards

maXer
FreeWilly
QUOTE (maxer @ Apr 21 2006, 10:00 AM) *
hi there!

the connector on the figure is a lvds probably a 3 channel differential one.
i can ensure that there is no way to input rgb signals on motherboard to make that lcd run simply because the signal on the motherboard are digital ones Red (0-7) Blue(0-7) Green (0-7) and some other control signals like clock,enable etc etc....

I'm starting to design vga to lvds interface with the intention to add DVI to Lvds latter,as prices of those controllers sold in internet are too high and i can't afford one.

if i will have success i'll let know !!!

regards

maXer



Hi MaXer,

Can you post your progress as you develop the board ? I am really interested in it.

thx
cromaclearcrt
QUOTE (maxer @ Apr 22 2006, 03:00 AM) *
hi there!

the connector on the figure is a lvds probably a 3 channel differential one.
i can ensure that there is no way to input rgb signals on motherboard to make that lcd run simply because the signal on the motherboard are digital ones Red (0-7) Blue(0-7) Green (0-7) and some other control signals like clock,enable etc etc....

I'm starting to design vga to lvds interface with the intention to add DVI to Lvds latter,as prices of those controllers sold in internet are too high and i can't afford one.

if i will have success i'll let know !!!

regards

maXer


maXer
Fantastic !
...can you though make a generic controller board that would work for all Laptop Screens ?
maxer
Design schematic and firmware completed! Waiting for parts to arrive!Going ahead to develop the PCB for it...it'll take some time as i'm in the middle of exams these 2 weeks and can't work too much on it right now.
As soon as i'll succeed i'll let you know!

P.s. instead the scart to rgb i'll build these days!

regards
maXer
maxer
i would like to know whether anybody of you here has good electronic skills,i would need flatlink interfaces datasheets,i intend the first prototype to be just functional on 640x480 and 1024x768 resolutions and will try on a hyundai tft 14.1" and a mitsubishi tft 14.1".These models have a 3 differential channel bus (and of course clk differential one, DE,GND etc) but larger models need 4 channels for rgb signalling.As i don't have too much free time to spend on searching around the web is it possible for anybody who has good electronic skills collect different interface's datasheets (5",7",14",15",17",19"..)and post them??


regards

maXer
cromaclearcrt
Hi Maxer

Im not sure I can help..however you might get more of a response if you start a new thread in
DIY Electronics section.

http://www.lumenlab.com/forums/index.php?showforum=41

Very much interested in your effort having a couple of LG panel laptops hanging around.
Keep up the efforts.

Cheers
maxer
not anyone answering anymore??

seems like nobody interested...everyone likes to get the results but not to give a hand...sad.gif

that's not good...

maXer
FreeWilly
I can give it a try. I am no expert in electronics though.

do you have any particular panels in mind except those two ? any brand that you prefer ?
maxer
Hi!
any type could go !

i need to know as many as possible lcd panel connector information (15,17,19,21 i would begin with these)
,pin information on connector,any lcd panel datasheet contain this information but i can't look every datasheet in particular, so this work would be easier if datasheets would be collected by lcd size,type of connector and link specifications so i would know that a certain configuration of firmware would do well for a whole group of lcds not not test them one by one.

regards
maXer
FreeWilly
Hi Maxer,

here you can find all lcd data sheets from 1.5" to 42" LVDS,TTL etc...

I have downloaded few datasheet on my hdd if this link doesn't work for you.

Let me know if you need more data sheets.

and please let us know your progress.

fw

http://www.displaze.com/Html/LCDTFT.htm
maxer
yes freewilly something like this....it is helpful as i can rapidly select any kind of tft by its connector and protocol interface....more sites like this would be very very helpful....

status :lvds block soldered & completed,designing rgb digital out.

regards

maxer
maxer
my first try didn't work,i think to have some trouble with the power supply block...these kind of ic's are very sensible to voltage variations...
instead the backlight works...

maxer
Litherish
Good luck with that maxer.

Pictures would be nice.
maxer
i paused temporarily the construction of the lcd adapter as i miss 1 IC that must arrive these days...and at the same time i'm building a horizontal folded pj 15""...i'll give pictures and measurements & details when finished (i think this week)

regards

maXer
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