big laptop LCD, looking for the data sheet (Samsung LT141X7-124) - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: July 21, 2015, 12:17:40 pm
content: hi guysI got a few LCDs, i'd like to do something useful with them but I am not able to find the data sheetthey are:Samsung LT142X7-124Samsung LT141X7-124do you know a14,1" 4:3LCD that has a well known data sheet and fits its mechanical constrains ?thank you in advanceedit:wrong P/N, fixed.

author: amyk
author_rank: Super Contributor
timestamp: July 21, 2015, 02:15:53 pm
content: Yes, no one is going to be able to find a datasheet for an LCD model that doesn't exist.If you mean theLT141X7thensomeone 10 years ago was successful in asking Samsung about it, perhaps you should try the same.There's plenty of 14.1" LCDs:http://www.panelook.com/sizmodlist.php?sizes%5b%5d=14.1

author: legacy
author_rank: Super Contributor
timestamp: July 21, 2015, 02:31:56 pm
content: ops, sorry, the label on the back of both of my panels is horribly overwritten, I was not able to read it clean(that is why I was not able to find the data sheet, but I had no idea of the right P/N)btw, thank you

author: legacy
author_rank: Super Contributor
timestamp: July 21, 2015, 02:50:28 pm
content: It seems it has poor data sheet, HP laptop's LCDs seem to have more detailed documentation.Unfortunately I got a few of Samsung's LCD for a few bunks

author: miguelvp
author_rank: Super Contributor
timestamp: July 21, 2015, 05:59:00 pm
content: I did purchase a controller board years back for a laptop display,This one might work for you:http://www.ebay.com/itm/HDMI-AV-VGA-LCD-Controller-Board-Converter-Driver-Kit-for-LT141X7-124-1024X768-/111402181542?pt=LH_DefaultDomain_0&hash=item19f01663a6Probably not the same vendor, and of course it won't do HDCP.I'll look to see what data I did gathered for mine a while back I might still have it with the description of the lvds cable for mine. But I think mine was a sharp display from a dell, capable of 1920x1200 at 60Hz.Link to my wine box screen with the controller I got, but probably from a different vendor:https://www.eevblog.com/forum/microcontrollers/tft-lcd-for-raspberry-pi-b/msg606242/#msg606242

author: miguelvp
author_rank: Super Contributor
timestamp: July 21, 2015, 06:16:36 pm
content: I think this is the vendor I got mine from a long time ago, and he sells just the lvds cable by itself:http://www.ebay.com/itm/DF14-D6-20Pin-LVDS-Cable-for-LCD-Controller-Panel-6Bits-/271022776501?pt=LH_DefaultDomain_0&hash=item3f1a3760b5The description shows what the pins are for the connector. Seems your display can go up to 1024x768Edit: mine didn't have the EDID signals connected either but the controller board would select the supported ones, I didn't get the programmer for my controller board because it was just a one off, but the boards that njytouch sells can be reprogrammed and he sells the programmer as well.One thing, the power supply I got from him, the power cable failed, but I replaced it and the supply is fine.

author: legacy
author_rank: Super Contributor
timestamp: July 21, 2015, 09:17:08 pm
content: in my plans, I'd like to design the controller, but I need the LCD pinout and its data sheet.

author: miguelvp
author_rank: Super Contributor
timestamp: July 21, 2015, 11:01:08 pm
content: Quote from: legacy on July 21, 2015, 09:17:08 pmThe last link I posted about the cable only has the pinout, plus you might need to get the lvds cable anywaysIf you want a custom cable with all the wires populated, i.e. grounds and EDID I think that seller can build custom lvds cables as well.Edit: Or you can just solder directly to the panel I guess, like this:http://g3nius.org/lcd-controller/btw that has good info on how the lvds signals work. And if you use an FPGA try to use dedicated lvds pairs and twist your negative and positive pairs.Again using a working controller will allow you to look at the signals better so might be worth it for developing your own solution.

author: miguelvp
author_rank: Super Contributor
timestamp: July 22, 2015, 12:13:54 am
content: I found a datasheet for the Samsung LT141X2-127 used on the Dell Inspiron 7000 14.1" 1024×768http://www.datasheetarchive.com/dl/Datasheet-039/DSA0074248.pdfI did try looking for the LT141X5-126 that was also used on the Powerbook 300 and 400 series but no luck:http://lcdtech.info/en/data/lcd.panels.in.laptops.htmBut I guess like amyk already suggested if you want the actual datasheet you should send Samsung a request.

author: miguelvp
author_rank: Super Contributor
timestamp: July 22, 2015, 01:48:12 am
content: So I had a broken LCD screen and I took the actual driver board just for kicks. It's not like yours since this one has a 30 pin LVDS connector.But it's an Samsung LTN154X so if yours is anything like this it should have the signals on the silk screen and test points that you can solder to if you don't want to make your own LVDS cable. This one is a 30 pin one so the signals don't match your 20 pin one and the ground and VCC are swapped.But be careful removing the tape covering the board if you want to double check if the signals I linked before match your display (they should). Be specially careful with the connection between the driver board and the actual LCD, those are pretty fragile and the tape covering the LVDS connector does protect them.

author: ale500
author_rank: Frequent Contributor
timestamp: July 22, 2015, 11:51:55 am
content: I still have a 14" panel from a Powerbook lomard, I don't remember the exact model number, but I do remember I did see a datasheet or something like that a few years ago, like 2007 or 2008.

author: miguelvp
author_rank: Super Contributor
timestamp: July 22, 2015, 02:46:14 pm
content: The LTN154X board I did show was taken out of the actual LCD so that's not the one I'm using, that one was only a 1280 x 800.I will look at details on the one I use that is a WUXGA capable one 1920x1200 that allows full 1080p and still has some pixels left (120) for an UI under or over the video. It's also a bit bigger at 15.1 inches diagonal I think.

author: legacy
author_rank: Super Contributor
timestamp: July 22, 2015, 03:40:18 pm
content: too big, I have the constraints of 4:3 14.1", I have to re-use the PowerBook chassis.

author: miguelvp
author_rank: Super Contributor
timestamp: July 22, 2015, 03:45:15 pm
content: Take your pick!http://lcdtech.info/en/data/lcd.panels.in.laptops.htm

author: legacy
author_rank: Super Contributor
timestamp: July 24, 2015, 02:23:05 am
content: Quote from: miguelvp on July 22, 2015, 12:13:54 amrequest sent to them

author: miguelvp
author_rank: Super Contributor
timestamp: July 25, 2015, 12:29:23 am
content: Hmm:http://www.mikrocontroller.net/attachment/136578/ds_ltn141x7_124.pdfI guess it had two names.

author: legacy
author_rank: Super Contributor
timestamp: July 25, 2015, 02:24:35 am
content: thank you, you are great

author: miguelvp
author_rank: Super Contributor
timestamp: July 25, 2015, 02:51:41 am
content: As for the timings even if these two have different LVDS interfaces it seems the clocks are the same:This one uses the same inverter as the LTN141x7-124http://www.beyondinfinite.com/lcd/Library/Samsung/LTN141XF-L03.pdfThis one uses the same LVDS interface connector as the LTN141x7-124http://www.beyondinfinite.com/lcd/Library/Samsung/LTN141X8-L02.pdfI think with all those three datasheets you should be able to drive it.