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Help finding a way of controlling an LCD with USB 3.1 Type C? Answered

Hello and thank you for taking the time to check out my problem.

Recently my laptop tied, sad story, and I have decided that I would like to pay an homage to its faithful service by turning the LCD display into an external display. I realise that that there are many guides on how to do this, using a controller board that sources an external power supply.


However, I would like to use USB type-c to power and deliver the video signal to the display. As the idea is to make it a portable display I don't want to need an extra power supply to power my second display. USB definitely can deliver enough power to the display, but after searching for hours I was not able to find any controller board that has this capability.

Either it is difficult to find due to the overwhelming amount of regular controller boards or it does not exist. Surely I cannot be the first person in the world to attempt this, or come across this problem. I hope that maybe any of you might have the knowledge of how to pull this of, or maybe tried it yourself or even better, know of a commercial hardware solution for this.

Oh yeah, my panel is a B156HW01 (V3).

Cheers and thank you for your time!

EDIT:

I woke up with the idea of maybe splitting a USB Type C cable to get the power and ground of the usb c and run this into the power port of for example: https://www.amazon.com/Controller-Board-Driver-Panel-B156HW01/dp/B079HPRGS4?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-ffab-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B079HPRGS4 and then plug it into a usb c to DVI adapter. However I do not have enough knowledge of the electronics to tell of this is a really stupid idea of a potential solution.

Discussions

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radub24

2 months ago

Did you manage to split the cable?

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mheeniacradub24

Reply 2 months ago

I never ended up trying it, as I was afraid I would not be able to draw the required power from the port. As all of the boards suggest 12V 2-3A and I don't believe that the laptop will be able to deliver this kind of power.

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mheeniacrickharris

Answer 9 months ago

Hi Rick,


Thank you for your reply! The 5V board looks interesting, not sure if it would work though as I believe the back light LED of most boards are 12V, unless that PCB steps up the voltage. I believe that USB Gen 3.1 Type-C can deliver up to 20V 5A, that is why I was thinking there might be a way to use its power.

I realise I could indeed use my power supply like in the video, but then I would always need my power supply with me and it would add to the cable clutter. It would really be nice and elegant to just have one simple cable coming from the laptop going into the screen.

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mheeniacrickharris

Answer 9 months ago

Yes but he still uses two cables right? One that is coming from his laptop's charger that has made a little splitter with voltage regulator for, and one HDMI cable. That makes two cables, I am looking for a solution with one cable that would not need to use the laptop's charger. I guess I will just start playing around with splitting the power from USB and seeing where it gets me