15.6" / 17.3" eDP Displays for LattePanda Alpha!?

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LattePanda
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Tue Nov 13, 2018 9:04 am

This is a info shared by community developer Thomas Vincent.

Vincent said:
"I got lucky that it worked "as is" with no driver.
I'm building a laptop around the lattepanda and purchased a screen with a control card. I tried to plug the screen directly 1st and it worked right away!
Samsung LTN156HL01-102 PLS is the reference for the screen
It's one of the 10 best 15 inches screen of the last 5 years. Great contrast !"

He also shared with us the datasheet of this display: http://www.panelook.com/LTN156HL01-102_ ... M6YejjaPk4

And some extra notes:
"There is only some very slight black & white flickering that I notice at startup. But not noticeable when working.
The brightness control works fine too (from linux and windows)
For the flickering, it occured also when using the control card, without the lattepanda“

Hope it will be helpful for everyone here, who is looking for a slightly bigger display for your desktop development environment!

Updates 20190123:
Check out the 17.3 inch (model - B173RTN02.2) display testing info from this post - https://www.lattepanda.com/topic-f23t17 ... l?start=11
!!! Contributed by @revtor
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LattePanda Alpha + 15.6inch display.jpg
LattePanda Alpha + 15.6inch display.jpg (170.03 KiB) Viewed 4983 times
Enjoy Tinkering with LattePanda ! :lol:

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Vlodac
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Joined: Tue Nov 13, 2018 6:48 am

Wed Nov 14, 2018 1:21 pm

I am also planning similar idea of using my 4K laptop monitor from HP Omen 17-w151nr (MB is burned and replacement would still cost ≈$1000) but I need adapter splitting 40 pin (39 really, because third is empty spot - see photo
20181114_042401.jpg
20181114_042401.jpg (85.23 KiB) Viewed 4949 times
Well it is my understanding that I need adapter/splitter for eDP and touchscreen...
Would that be standard?
Do you know anything about it?
Anybody?

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revtor
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Wed Nov 14, 2018 2:41 pm

Thomas, did you use any particular eDP cable? Shouldn't every eDP LCD work, isn't that the point of having the eDP port on the board?

I am asking these questions because I really want to build my LPA in a tablet format (without touch screen), and using a laptop LCD (eDP) would be the perfect solution. Dont want to spend $50 on something that wont work. .

So, is there such a thing as a generic eDP cable? and shouldn't all eDP displays just work?

thanks a lot

~Steve

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tvincent
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Joined: Tue Nov 13, 2018 3:32 pm

Fri Nov 16, 2018 4:20 pm

Hello,
Thomas, did you use any particular eDP cable?
the edp cable I used is 30 pins. Image (https://ibb.co/mDF1N0)
Beware that there exist two orientations (A and B). You might have to do a twist with the cable if it's not the suited orientation.
Shouldn't every eDP LCD work, isn't that the point of having the eDP port on the board?
I understood that the pinout can be different from one screen to another even with the same number of pins. It has to be the same pinout as the one accepted by the panda.
It is described in the lattepanda manual (last page I think).

If you want to know the pinout of the screen, you can check panelook.com (to get datasheets, you need and an account and to either pay with money or with some coins you earn by posting photos/feedback/info on material).
I need adapter splitting 40 pin (39 really, because third is empty spot)
I'm 99% sure this doesn't exist unfortunately.

The alternative is to use a control that is compatible with your screen then you use hdmi to connect with the panda. The drawbacks are 1) you have a new PCB to pack in you setup 2) you have one extra cable to manage (HDMI) in addition to eDP 3) the control card need its own power input!
I was going with this solution at the beginning and I'm happy I didn't need it in the end.

This video really give a lot of useful information about which screen to get and where to find the control card:
https://www.youtube.com/watch?v=CfirQC9 ... st=WL&t=0s

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LattePanda
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Fri Nov 16, 2018 11:01 pm

@tvincent, nice video!
Enjoy Tinkering with LattePanda ! :lol:

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Simpleton
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Fri Dec 28, 2018 12:07 am

Is the 30 pin cable used in the first post connection both same side? I know putting a half twist was mentioned, just want to make sure doing so doesn't reverse pin order.

Thanks.

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LattePanda
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Fri Dec 28, 2018 2:33 pm

Simpleton wrote:
Fri Dec 28, 2018 12:07 am
Is the 30 pin cable used in the first post connection both same side? I know putting a half twist was mentioned, just want to make sure doing so doesn't reverse pin order.

Thanks.
Please make sure you plug in the cable following the tutorial! http://docs.lattepanda.com/content/alph ... ripherals/
Enjoy Tinkering with LattePanda ! :lol:

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Simpleton
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Fri Dec 28, 2018 6:24 pm

Thanks for the reply.

I have the pinout and orientation of the LattePanda board connector, but I can't make out from the pictures on the web what the orientation of the connector on the panel is. And I can't find a pinout diagram for the referenced panel.

If I get the panel, I guess I can see the GND, GND, TX1_DN , TX1_DP, GND configuration of 1st 5 pins (should be easy to find GND, GND, X,X, GND sequence with multimeter) and determine sequence that way.

It would be nice if someone who already owned the panel could confirm the orientation of the cable (contacts same side or reverse side).

I find this easy enough, contacts same side:

https://www.amazon.com/30-pin-Forward-D ... B00W8W9YYG

Found this one, too - contacts either side. Now it should work either way.

https://www.ebay.com/itm/222367105998

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macwan
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Joined: Wed Dec 26, 2018 2:41 pm

Fri Jan 04, 2019 3:35 pm

I believe this panel is a similar and should/could work directly with Alpha:

http://www.panelook.com/LTN125HL02-301_ ... 26609.html

It has same specs what comes to the interface than the 15,6" mentioned in the original post.

I'm planning to get one, it is around 50+€, but if the bigger one with same characteristics works OOB, I trust this will also ;) Famous last words :D

-Mac

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revtor
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Mon Jan 07, 2019 1:37 am

I have a panel here and cables coming in a week or so. When I get it up and running (fingers crossed!) I’ll post some pics etc etc..
Steve

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