Will this work? Combining 2 screens.

If you're making a portable you probably need something to watch it on. (Unless you want to guess what's happening in the game, but I wouldn't advise that) Anyway, this forum is your "Hacking a pocket TV/screen" one-stop solution. Share your experiences and knowledge here.

Moderator:Moderators

Post Reply
User avatar
Kurt_
Portablizer
Posts:5748
Joined:Thu Nov 24, 2005 10:32 am
Steam ID:kurbert
Location:Ontario, Canada
Contact:
Will this work? Combining 2 screens.

Post by Kurt_ » Sat Mar 03, 2007 10:28 am

Will this work. I have the one 7" DVD screen with barely any guts. If I hooked up a board from another screen (that outputs composite) to the correct pins, could I possibly get this screen running?

Also, the LCD is just an LCD right? There's no special LCD for a digital signal and an analog signal? It's the boards that do the signal accepting and rejecting, right?
Hey, sup?

User avatar
vskid
Senior Member
Posts:6314
Joined:Fri Mar 25, 2005 8:25 am
Steam ID:vskid3
Contact:

Post by vskid » Sat Mar 03, 2007 10:39 am

The ribbons on the LCDs are usually different if they aren't compatible, but being the same doesn't guarantee it'll work.
Image

User avatar
Retromaster
Portablizer
Posts:791
Joined:Wed Nov 22, 2006 11:03 pm
Location:florida- the land of old people
Contact:

Post by Retromaster » Sat Mar 03, 2007 11:19 am

no. it will not work

vskid, change your sig.
http://portableuniverse.forumcircle.com/index.php? http://mtac.profusehost.net/ Image SAY ALLO TO MY LITTLE FRIEND!!!i finally used google!!

User avatar
vskid
Senior Member
Posts:6314
Joined:Fri Mar 25, 2005 8:25 am
Steam ID:vskid3
Contact:

Post by vskid » Sat Mar 03, 2007 11:33 am

Retromaster wrote:vskid, change your sig.
Not until you change you. If you have a problem with it, take it up with a mod.

@Kurt_: Could you post good pictures of the LCDs' ribbons and the connectors on the boards?
Image

User avatar
Retromaster
Portablizer
Posts:791
Joined:Wed Nov 22, 2006 11:03 pm
Location:florida- the land of old people
Contact:

Post by Retromaster » Sat Mar 03, 2007 11:40 am

I have.

doing this will not work, kurt.
http://portableuniverse.forumcircle.com/index.php? http://mtac.profusehost.net/ Image SAY ALLO TO MY LITTLE FRIEND!!!i finally used google!!

User avatar
vskid
Senior Member
Posts:6314
Joined:Fri Mar 25, 2005 8:25 am
Steam ID:vskid3
Contact:

Post by vskid » Sat Mar 03, 2007 11:56 am

I disagree, there is a slight possibility of it working, if I understand it right. Could you explain more, Kurt_?
Image

User avatar
Kurt_
Portablizer
Posts:5748
Joined:Thu Nov 24, 2005 10:32 am
Steam ID:kurbert
Location:Ontario, Canada
Contact:

Post by Kurt_ » Sat Mar 03, 2007 12:43 pm

Retromaster, shut the spamhole.

Vskid, pics are in the other thread here: http://benheck.com/phpBB/viewtopic.php?t=17168
Hey, sup?

User avatar
vskid
Senior Member
Posts:6314
Joined:Fri Mar 25, 2005 8:25 am
Steam ID:vskid3
Contact:

Post by vskid » Sat Mar 03, 2007 1:06 pm

Could you post pics of the other board and explain a bit more?
Image

tom61
Senior Member
Posts:1517
Joined:Fri Mar 25, 2005 6:51 pm

Post by tom61 » Sat Mar 03, 2007 1:16 pm

The LCDs need to have the same native resolution and the same interface (i.e. LVDS) to be able to interchange OEM controllers. If they are that simular, you'll just need to match up wires.

That's why LCD controllers you see for sale separately are so expensive, they have to be adaptable to a wide variety of screens, which makes them more complex.

User avatar
Skyone
Moderator
Posts:6390
Joined:Tue Nov 29, 2005 8:35 pm
Location:it is a mystery
Contact:

Post by Skyone » Sat Mar 03, 2007 1:43 pm

Don't bother with retromaster, he has no clue of to what he's talking about.

Actually, I happen to have that exact same screen sitting right next to me! Unfortunately, I broke it. :|

http://benheck.com/phpBB/viewtopic.php?t=16518

That thread might give you some nice information depending on the screens' part numbers your mixing up.

User avatar
Retromaster
Portablizer
Posts:791
Joined:Wed Nov 22, 2006 11:03 pm
Location:florida- the land of old people
Contact:

Post by Retromaster » Sat Mar 03, 2007 1:54 pm

Skyone wrote:Don't bother with retromaster, he has no clue of to what he's talking about.
well, I know that its possible this wont work.
http://portableuniverse.forumcircle.com/index.php? http://mtac.profusehost.net/ Image SAY ALLO TO MY LITTLE FRIEND!!!i finally used google!!

User avatar
Kurt_
Portablizer
Posts:5748
Joined:Thu Nov 24, 2005 10:32 am
Steam ID:kurbert
Location:Ontario, Canada
Contact:

Post by Kurt_ » Sat Mar 03, 2007 2:25 pm

@ Skyone: Seen that thread, didn't help much. What were you using YOUR screen for?

@ Tom: I'm intrigued. I have a 7" screen and a 5" screen's board. Will this result in a stretch, a letterbox, or complete incompatability?

All this stuff is assuming I don't get it sold on ebay on monday. I hope to God I do, but just incase, y'no.

@ Retromaster:
Image
Last edited by Kurt_ on Sat Mar 03, 2007 3:06 pm, edited 1 time in total.
Hey, sup?

User avatar
Retromaster
Portablizer
Posts:791
Joined:Wed Nov 22, 2006 11:03 pm
Location:florida- the land of old people
Contact:

what the hell?

Post by Retromaster » Sat Mar 03, 2007 2:33 pm

Image
wow. I need to sig that.
http://portableuniverse.forumcircle.com/index.php? http://mtac.profusehost.net/ Image SAY ALLO TO MY LITTLE FRIEND!!!i finally used google!!

tom61
Senior Member
Posts:1517
Joined:Fri Mar 25, 2005 6:51 pm

Post by tom61 » Sat Mar 03, 2007 8:55 pm

Kurt_ wrote:@ Tom: I'm intrigued. I have a 7" screen and a 5" screen's board. Will this result in a stretch, a letterbox, or complete incompatability?
If both are the same resolution in X and Y (ie both 320x240), have the same interface and the same ratio (i.e. 4:3), then the screens are the same except the size of the of the pixels, and will be full screen using either controller on either screens. If the 7" is the same res(and the other things mentioned) , but the 7" is 16:9 and the 5" is 4:3, having the 5" screen's controller on the 7" would result in the picture being 'stretched'.

Additionally, there is one more consideration in LCD compatability that I haven't mentioned, and that is dot-clock (sometimes a dedicated line, or H and V combined). You don't have to worry about this in most cases, as the dot-clock should be the same if the screens are the same res and refresh rate. The problem is when the refresh rates are different, so a controller from a PAL screen may not work on a NTSC screen, but will work in some cases, dependng on how the controller handles the dot-clock.

User avatar
Kurt_
Portablizer
Posts:5748
Joined:Thu Nov 24, 2005 10:32 am
Steam ID:kurbert
Location:Ontario, Canada
Contact:

Post by Kurt_ » Sun Mar 04, 2007 9:52 am

Such insight and potentially useful knowledge!

I have 2 watchers on it on ebay, so I hope I sell it. Don't want a stretched picture, after all.
Hey, sup?

Post Reply