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Can I turn my lcd laptop monitor into a desktop monitor?
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bytedawg
Newbie
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2. December 2005 @ 14:44 |
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If you checked the thread you'd know several things.
Q: So can I be sure that my laptop lcd panel will be able to replace a lcd monitor's panel?
A: NO, an LCD FPD not from a laptop has a different input and connector usually VGA or DVI of some kind but is typically standard with other LCD monitors but if it is from a laptop the connectors are usually designed specifically for the laptop and sometimes even if the same screen is used in a different model of laptop.
Q: Im think that the cheapest way to solve this thing is to buy a lcd monitor with a cracked panel (under 10 bucks on ebay).
A: Not a good choice as the screen may not even work, if it does it
could have abberations and anomolies, lines and missing data.
Q: Is there a difference between a monitor and laptop lcd panel?
A: YES and NO, see above or read the thread from beginning.
Q: Could it be that modern lcd panels use the same standard as far as
raw wiring exiting the panel?
A: wouldn't that be nice, a standard FPD designed as a stand alone
monitor, YES, but check which standard VGA or DV, etc. The laptop
FPD if it is TFT LCD whether VGA, SVGA, XGA or higher resolution
has a common signal convention but depending on resolution and
manufacturer will have different connectors and number of pins to
accomodate the added lines of resolution, maybe. IF all laptop
screens werre standardized you could take one out af any laptop and
put it in any other laptop, and WHY would you want to be able to do
that???????? And older screens can be single scan or dual scan and
the manufacturers made sure they were not compatible with other
laptops as well. It's called being able to make a profit on parts,
and there is this resolution thing. You see LCDs use horizontal and
vertical lines, say 1024x768 to make a matrix and a driver is
required for each line, lots of drivers with higher res you need
more lines and signals need to be converted from the main chipset,
essentially decoded by the driver sets. So cabling is at the mercy
of the engineers or their managers.
In short, to replace ANY LCD it will have to be exactly the same as
the original or compatible unless you can work magic with flat
ribbon cables or make adapters to match signals which has been
previously posted.
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relfstkid
Newbie
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2. December 2005 @ 22:20 |
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bytedawg, ive read your posts, and I understand what you guys are saying about the controller and everything. You mentioned in some of the posts that you said getting the schematics for monitors was possible. Where would you get this information, should i just contact the manufacturer? You cant really begin to understand the signals that you need to send the monitor until you have this information. The laptop monitor that I have is from an HP XE3, and the screen is a CPT 14.1 in. TFT display. It is HP part number F2111-60911. I just included this info in case you had some sort of way of getting the info that I dont. If you can help, I would appreciate it. This could be a fun project for a student engineer.
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bytedawg
Newbie
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3. December 2005 @ 18:17 |
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Yes, the schemas are crucial for getting to the heart of the matter and they used to be avail. on the net as well of course from distributors
in book form. I've got both types of libraries but I haven't tried to access anything on the net for most current LCDs even though I may have replaced them. The HP number you referenced doesn't mean anything to me
and what most people don't realize is that Dell, HP, Compaq, etc., don't really make their own systems. Assembly is not the same to me and there are also very few screen manufacturers. And as good as HP's support is they may not provide the screen info you need, however, there are other ways to get this info by for example doing a screen replacement search
although this may not get you the schema. As an engineering student you should be able to get access to this type of info, if not from the school but from Allied or Pioneer or Newark or another distributor. I'll share my library but it is somewhat limited to older screens and if I find a good source I'll post it 'cause it is pertinent info for many reasons. good luck. got a screen number email me at randombyter
at yahoo dot com and I'll see if I can help. tx31d30vc1caa for ex:
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anahrah
Suspended due to non-functional email address
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9. January 2006 @ 12:06 |
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So I've reaed through the forum and am still confused. It's been YEARS since I've canabalized computer parts to this degree. Here's what I've got...
I inherited a GeForce 6800 from a roommate. It's got dual DVO ports. I'd like to use an old laptop screen as the monitor. What the heck do I need to do to get the old (really old) laptop screen to work using the DVO from my PC video card?
-Anahrah-
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jusnky
Newbie
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11. January 2006 @ 17:00 |
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ok i've been looking at this thread in my lunchbreak....
i have a slightly different plan for the laptop lcd panel i have accuired the panel itself is an lg lp133x7 (n2ac). what i want to do is this, i don't care about having the backlight for the panel working only the lcd plate itself, i want to convert the existing cabling from the laptop cables to a dvi connector, i know some expert soldering is a must i'm cool witht that, i just want to know how to convert it to dvi to plug into a standard dvi connection on a standard pc with little mess and or boards / wires as possible, and when i'm done i'll post why i am doing it with detailed instructions so anyone can copy the project( i'll even throw up some pic's for the kiddies to keep them interested too.... ;))
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Bronco2v8
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12. January 2006 @ 13:46 |
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Okay, I've read this whole script, and I think I have what is needed to complete my LCD screen conversion. But I have no idea how to hook it all up.
My screen is a Matasushita/ Panasonic EDMGR68KDF
and my control card is (I think) a Samsung? TE17PO
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bytedawg
Newbie
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12. January 2006 @ 15:23 |
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you may be reading but you're not paying attention or comprehending. try again and pay attention to detail and try to grasp the concepts of serious electronic conversion and engineering principals. There is more to it than just throwing a bunch a stuff together. Unlike humans electronic components do not have a tendancy to copulate and produce offspring that is a combination of genetic or digital material.
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Hubert
Newbie
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26. January 2006 @ 23:28 |
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I have a Samsung LT150X3-126 display (15",from Compaq Presario) with inverter and I would need info about video and power pin assignment. I've been searching thenet 4 a while now, no news yet. I even wrote 2 Samsung 4 help, nothing.
I want to make my own converter as my final thesis at university, but i need pin info first.
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Hubert
Newbie
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26. January 2006 @ 23:38 |
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DylanUK: in your picture, video input is below the "sensitive" sign, a small brown plug. But U also need an inverter (i think) in order to work.
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sabad66
Newbie
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5. February 2006 @ 19:04 |
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Any updates with regards to getting this going?
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bytedawg
Newbie
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6. February 2006 @ 10:51 |
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Hubert
Newbie
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9. February 2006 @ 01:47 |
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Thank you for your help, but the page you gave me, didn't contain what I needed. I wrote Samsung semiconductors for help and they sent me the spec I needed. One down and 2 many 2 go.
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Techburn
Suspended due to non-functional email address
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9. February 2006 @ 02:38 |
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Read through the thread a couple times and after looking at some of the links and my LCD(NEC NL10276BC26-09) It seems that the cabling for this model is pretty damn identicle (Except in the plug{Not Sure, havent found a side by side comparison}) to the ex-standard DFP. Is anyone willing to help me confirm this as it would make the lives much simpler of those few who have the display and would allow me to start working on finding a decent convertor board (Or simple DFP to DVI cord (Purchasable)) Thanks.
This message has been edited since posting. Last time this message was edited on 9. February 2006 @ 02:39
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steve03
Newbie
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17. February 2006 @ 03:42 |
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OK, I've read the whole thread.
I'm on exactly the other end of the problem.
I have a device that outputs LVDS and need to convert it to Analog VGA for capture.
There is a fairly inexpensive way to convert Digital Video (Flat Panel/DVI) to LVDS. Applied Data Systems which manufactures Single board computers has the schematics for the converter here
http://www.applieddata.net/developers/documents/112-3_ADS_LVDS_ad...
The secret is the LVDS Transmitter IC DS90C363A.
The Digital signals get mapped to it and it serializes and sends over 8 wires (4 twisted pairs).
Most Desktop video cards have a DVI output which could be mapped to the transmitter IC.
The only reason LVDS is used is to get better maximum cable length between video output device and LCD as the differential signaling is more noise tolerant.
As stated in previous posts, all LCDs are digital input and that means 30-40 wires if you're LCD only has 8-12 then it's likely LVDS.
This does not include the Backlight controller which may or may not be built into the "LCD". An actual Backlight only needs 2 wires, and they would be a fairly high voltage 100-300 volts albeit at low current. A larger number of wires would mean that the inverter being used to generate this high voltage signal is included on your "LCD" and the other wires would be for +12V, GND, Backlight On/Off, and PWM to control brightness.
That info should let you identify whether or not your "LCD" is LVDS or Fully Digital. Non LVDS should be able to be connected directly to a DVI output of a video card, although you'll have to map the pins accordingly.
Oh, and the little 20-26 pin connector that the pictures are floating around of is most likely a 3M MDR connector (The standard for LVDS)
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rrimac
Newbie
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22. February 2006 @ 13:01 |
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Hi there!
Thanks gays for these thread... and I need help.
I had a car accident and my laptop was on back seet.
Everything is broken but the 15" LCD. I'm not sure that it works - but I think it does.
It's an IPC laptop. Year... Uh... I think 2000.
I would like to mode it to be a desktop monitor, but... I don't know how.
What do I have to do? What do I have to buy? What do I have to make?
If someone knows please HELP!!!
You can E-mail me on rrimac@gmail.com
quiksilver
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wolfclan
Newbie
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14. March 2006 @ 00:07 |
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hi guys I have a display form a compaq700z 14.1 xga tft and i was wondering if it could be turned into a monitor for a dvd player that goes in the car. i was going to try it out for the kids when we go on trips. Is this so and how can i wire it up? Or just make a mnitor for my desk top to give me more room on my desk.
This message has been edited since posting. Last time this message was edited on 15. March 2006 @ 13:26
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kruiik
Newbie
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30. March 2006 @ 05:37 |
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This message has been edited since posting. Last time this message was edited on 30. March 2006 @ 05:38
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Kreyon
Junior Member
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30. March 2006 @ 06:08 |
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everything is possible if you have enough money to throw at it, about how important is this to you in terms of Cold Hard Cash? worth $300? $500? $1000? these days it is cheaper to buy then to build, whch makes all of us who were trying to recycle technology just people with a lot of junk around our homes.
I am finding that I can afford to buy what I need these days, and I cannot build it myself for less than double what it costs to buy. hence makes no sense to try and recycle anymore.
(for example = if you want a 4 monitor display - buy 2 dual output video cards >$99 4 15" LCD monitors Approx $125 each. Any windows operating system since windows98 supports multiple monitors( up to 8 video cards and 16 monitors, I think) and video cards so no extra cost there. and your 4 monitor system is about $600, now to make the same system out of old LCD panels, you would need 4 controller cards (about $200 each) HMMMMM and how would you drive 4 controllers at once, that must be another part that we would need lets say that only costs $100(for giggles) and then a way to mount your LCD panels together HMM another $100 (again for giggles) 4 power supplies and etc.... (lets say another $100) so the total to make this ourselves has so far come out to about $1100, and we may find we neeed other items as well, who knows. point is this is not cost effective and does not make sense anymore.)
and on the 7th Day God Created Man, and he looked around and Said to God, "Where the HELL am I supposed to plug in my Laptop?!?"
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kruiik
Newbie
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30. March 2006 @ 06:15 |
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Geekfactor on 15" stripped laptop LCD's is much higher than 15" separate stripped monitors.
Let me ask it this way - how to use a Omnibook's stripped LCD display as monitor without remains of the actual laptop.. ;)
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sit_back
Newbie
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3. April 2006 @ 14:07 |
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Might be a bit OT, but situation is this.
I got an old inoperable iMac G4 with a 17'' lcd and i wondered if there's a way of using it's display as a second monitor on a PC. That is, is it possible to connect it to DVI?
Tnx.
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bytedawg
Newbie
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3. April 2006 @ 20:42 |
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I don't care what kind of "LCD" from a laptop/notebook/tablet you have
they can be adapted but if you read far enough back in the thread you'll find all kinds of great info that should not need to be repeated over and over. Again, commercial adapters are available that can adapt to some screens but again they may be more expensive than the alternative of buying a readily available screen that just plugs in to your system. A good tech can make the hardware work for a reasonable cost but the project is not for the brain dead or those unfamiliar with wayward electrons. By the way, backlight voltages are in the 1500 plus volt range in some cases and can cause expletive deleted language, also if you read one of my posts you'll learn of a method of eliminating backlight requirements.
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Kreyon
Junior Member
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4. April 2006 @ 05:45 |
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ByteDawg is Right. I have been trying to explaine that "Anything is possible with enough money!" so I ask is a "Geek Factor project" that takes trash and gives it a extra year or so of life worth the $1000's you could spend to make it happen? when for <$200 you can buy the same item in working order with Warrenty. I don't think so, and believe me I have had some great ideas for using 15" lcd monitors in my truck as the video sysem monitors, placing them in the doors and ceiling and more.... but I can buy Awsome working LCD's made just for that for less than I can build them from junk for, so I can't understand why I would want to spend 6 months or more on trying to create them myslef.
the bottom line is too many people are starting at the end of this thread instead of taking time to look at all the great info we have talked about on the first 5 pages.
so before posting anymore questions like can I do this... first ask yourself a couple questions.
1) have I read the whole thread?
2) do I have so much money in my pocket that I want to throw it away for no good reason?
(for those of you who answer yes to the second question, please let me know how much you are willing to spend and I will put something together for you! I have no problem taking your money! just the cost for my Time will cover a whole new system for my truck as well as make a few payments! *LOL*)
come on people lets be serious here, 10 years ago (hell, maybe even just 5) this would have been worth the time and effort, but today it's Just plain NOT worth it. (unless you are rich!, and if you were this would not even be an option, think about it.)
and on the 7th Day God Created Man, and he looked around and Said to God, "Where the HELL am I supposed to plug in my Laptop?!?"
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yesyesuk
Junior Member
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15. June 2006 @ 03:40 |
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Hi!
I've read most of this thread as I too want to use a display panel from an old laptop on my desktop PC.
The panel is a Samsung LT141x4-156 1024x768 TFT. I also found the LVDS transmitter on the mainboard of the laptop. That's a Texas Instuments SN75LVDS83. I found the specs for this chip and it looks fairly straight-forward. It doesn't seem to have an external clock so I guess it takes the clock from the incoming signal?
In this thread someone mentioned that some nVidia graphics cards have a built-in LVDS transmitter (MX and FX series?). Do I understand this correctly that if I could find out the pin-out for the display cable and for the nVidia chip and just connect the LVDS transmitter's pins to the appropriate pins of the display that go to the LVDS receiver that it might work? Or is there still the timing problem?
Or could I try to use the transmitter from the mainboard and connect it to the graphics card instead of the external DVI transmitter on the card?
I asked Samsung to provide a data sheet for this display because someone in this thread mentioned that they sent one. They replied to me within minutes but said that the panel is EOL and they don't have data sheets anymore.. :(
UPDATE: Samsung sent me the pinout for the LVDS connector. At least something to start with ... ;-)
Chris
This message has been edited since posting. Last time this message was edited on 16. June 2006 @ 00:11
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yesyesuk
Junior Member
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16. June 2006 @ 10:09 |
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don't know if anyone is still reading this thread but I did some more research and would like to hear (read) your opinions.
In the datasheet for the LVDS transmitter (the one on the mainboard of the laptop) I found this:
Now, as far as I understand this, all I need to do is to take a graphics card, find the pinout for the GPU (I imagine that's the hardest part) and connect the LVDS transmitter to the GPU according to the above diagram. The 3.3Vcc I can probably take from the graphics card somewhere. And then there is the thing with the backlight but that should not be too difficult.
Opinions please....
Chris
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avatarek
Suspended due to non-functional email address
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27. June 2006 @ 16:37 |
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Ok i too have a Presario 900z with an LCD dangling from it and screws falling apart from everywhere. I was thinking of creating some sort of interface between it and some sort of standard display cable (DVI,VGA,RCA,S-Vid..etc) perhaps build on this and add a usb touch sensiteve for it to act as a tablet. and if i go crazy enough go wireless and use bluetooth or something.
Anyway i'm a computer eng. and this should be my game but i'm not really a modding enthusiast and i know given time and some money (but still less than buying an LCD) it could be done.
For now i could throw in my two cents and suggest a somwhat neat methodology:
It has been establishied that most LT LCDs use some sort of digital interface. So the easiest route is to go for DVI and somehow interface it with the proprietary TFT pinouts. This saves the headache of DAC and ADC. With the conversion to a 'standard' interface it should be easier to chage to all other 'standard' interfaces.
So it boils down to:
signal levels and data format.
As with yesyesuk's post we need the data sheets for the pinouts and the datasheets for the DVI standard.
I will perhaps start soon on this project and in my head i'm thinking:
How fast is the frequency of the signals (DVI,LCD)
how long will the signal go.
how is the data encoded.
and finally is EMI (electromagnetic interference) a big issue.
With the result of our collective knowledge (long live the net!)
we could come up with a solution to the dvi side of the 'connection' and then for each LCD connection type it's decoding scheme (i mean how many are there!!) I'm sure there will be just a few data formats and many pin shapes and sizes or else they're just reinventing the wheel with every model and that is not good for business in terms of production/design costs.
My 2 cents worth...
for now!!
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