this post was submitted on 01 Apr 2025
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Is it super standardised, like where all 30 or 40 pin LVDS connections are the same, as in pin and voltage compatible?

Are there hardware peripherals in a microcontroller that just drive LVDS like how UART, SPI, CAN, etc. work? Or is it a messy complicated thing with display specific power supply voltages, and unique power management requirements, baud rates and such?

I can find lots of old style monitor to HDMI or VGA conversions for an old laptop screen based on display model number. But what I am looking for is a USB-C/USB-3 to LVDS converter board small enough to fit into an old apple laptop top shell and act as a second monitor with all power and functionality controlled through the USB interface. I have the fab skills. If there is a simple chip that does USB-C PD/display to LVDS, I'll toss it in KiCAD and etch it myself if I can get the chip. In my past experience with small displays for hobby microcontrollers, they were anything but standard in most cases. I have never messed with the larger stuff though. It appears like most of the old style VGA/HDMI converter boards are mostly sold with the same hardware/board with the proper LVDS connector installed.

I can take care of the backlight driver part. I'm mostly concerned with what is going on with LVDS in practice. Anyone familiar with the subject on Lemmy?

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[โ€“] jet@hackertalks.com 4 points 2 days ago (1 children)

LVDS is just a standard for pairwise low voltage differential signaling. You still need a protocol on top of that to talk to the video controller.

[โ€“] j4k3@lemmy.world 2 points 2 days ago (1 children)

Yeah it looks complicated. I'm seeing lots of FPGA projects in skimming around.

[โ€“] jet@hackertalks.com 2 points 1 day ago

Yeah, it's good for high frequency communication because its more resilient to noise and capacitive interference.