7" HDMI display for DragonBoard410C for Android


#1

Hi,

Is this HDMI display works on Android boot on DB410C as in description it mentioned only Debien. Please confirm.

https://www.arrow.com/en/products/96boards-display-7/linksprite-technologies-inc
“As the perfect pairing with the Dragonboard 410C, this touch screen supports the Debian operating system (DB410C) and comes with Debian images”


#2

While it will “work”, its a really crappy low resolution display.

Try on EBAY search for “hsd070pww1”. There are ones with or without touchscreen. Pay attention to the controller. There are some good controllers, and some BAD ones. Best controller is “PCB800661”, followed by “PCB800099”. The latter is larger and adds in some useless analog connectors, and requires you to set the correct “input”. The former is HDMI only.

You can do a google search for those two controller part numbers so you can tell which ebay kits are good.

This is an example of one NOT to get: https://www.ebay.com/itm/HDMI-DVI-VGA-lcd-Controller-board-7inch-HSD070PWW1-1280x800-IPS-lcd-panel/360702493306?hash=item53fb8b427a:g:Mi8AAMXQuCdTfsgl:rk:13:pf:0

The reason: That controller makes an INCREDIBLE amount of heat. Both from a severely overloaded voltage regulator, as well as from the converter chip itself.


#3

The reason the LinkSprite display is listed as Debian only is because it will not work out of the box with the Qualcomm Android releases for DB410C (which support only a very narrow set of display modes).

Qualcomm have provided a display porting guide which offers some clues on how to implement alternative video modes for their Android release (https://developer.qualcomm.com/download/db410c/dsi-display-porting-guide-linux-android.pdf ) but its not easy reading, especially with the DSI to HDMI converter chip in the picture too. I don’t recall anyone posting back to the forum to report they followed is successfully.


#4

If you want to 3D Print a case for the LinkSprite 10 inch display, I uploaded the OpenSCAD file to ThingVerse here: https://www.thingiverse.com/thing:3230934

The Linksprite display does work with Debian and Android AOSP, I don’t remember testing it with Windows IoT. The display is good small display to get your project up and running.

The LinkSprite display does have touch which works on Debian. Also wiring is simpler since the display includes a short HDMI cable and a short USB cable. The display gets power from the USB cable that feeds the touch info into the 410c.

I agree that the display quality and resolution is not the greatest. This is just a quick, easy and inexpensive way to get you up and running.

-Lawrence-