Touchscreen Displays and Manufacturers for SBC/SOM - Page 1
Forum section: electronics / projects

author: IronDruid
author_rank: Contributor
timestamp: March 01, 2021, 08:37:42 pm
content: Greetings,New member here so... "Hello World".I come from the NxM character display world, and have been asked to look into replacing a 4x20 character display and membrane keypad with a touchscreen display.A SBC/SOM solution we are considering runs Linux and has HDMI and USB support. So I have been "Googling" HDMI Touchscreens with mixed results.Waveshare Electronics (www.waveshare.com) seems to have some nice solutions, but seems to target hobbyists. Mouser/Digikey/Avnet/Arrow do not seem to stock their displays.Being a commercial project, supply chain, MTBF, support, production lifetime commitment are all important, and perhaps not so much to hobbyists.I would appreciate any constructive advice.-

author: coromonadalix
author_rank: Super Contributor
timestamp: March 02, 2021, 03:25:41 pm
content: for hmi devicesYou can find many companies, most china based, we use at our job Dwin hmi displays (since 2008, still available), they have some clones branding tooThe software(s) are relatively easy to work with, graphical interface, icons, bitmaps etc ... we communicate up to 921600 bauds with them, can be set down to 9600 bauds,, we have a slave board with avr device on them, can be used as plc controllers etc ...Infos and code snippets are easier to find on their china websites, (google translation help) with their english site, it is not easy ...Really depend of your needsmy 2 cents suggestions, not affiliated with DWIN

author: mon2
author_rank: Frequent Contributor
timestamp: March 02, 2021, 10:52:36 pm
content: Go to Alibaba.com and search for "HDMI Touch Display".Many will try to get you to customize the display which will often involve some tooling fee + MOQ volume to get started. In our opinion, better to work with something that is already tooled ('paid by another past customer' hint, hint) and ideally continue to camp onto their volume.There are far too many options for such items but it can be rewarding once you find the proper fit. The HK trade fairs (perhaps virtual) next month will have tons of such suppliers. For our embedded project, we are attempting to make use of iphone / ipad style displays but that is another story in itself.You can also consider HDMI to MIPI bridge boards + capacitive touch controllers that operate with I2C, SPI, USB and then make use of this bridge board for your Linux box. The HDMI to MIPI will be transparent and should be relatively straightforward to monitor the touch action from the display.Another suggestion, load up the Alibaba app and post a RFQ for "HDMI Touch Display" and your mailbox will be flooded with feedback within hours of their (China) opening tomorrow.

author: IronDruid
author_rank: Contributor
timestamp: March 04, 2021, 02:57:41 pm
content: How do you address the commitment to product production lifetimes with this approach?

author: coromonadalix
author_rank: Super Contributor
timestamp: March 04, 2021, 03:27:27 pm
content: I dont know a company who will offer 'lifetime' as you want ... they will offer maybe a 10 years availability ?? technology evolve pretty fastAs an exampleThe DWIN hmi panels we uses date back to almost 8 years, we did not receive an EOL, but i did saw technology changes on the panels, they still have compatibilities in the coding with minor changes ...what are the volume involved ??We are currently redesiging a new board interface, the sharps lcd + touch screen are phasing out, we managed to sell aroud 500 machines with themNow the problem we have is the panel thickness, it's almost twice as thick ...Just saying that nothing last foreverThings like this may happen, you'll have to maintain a good inventory

author: IronDruid
author_rank: Contributor
timestamp: March 04, 2021, 03:34:38 pm
content: Thanks,I meant 10 year commitment.If I try to "ideally continue to camp onto their volume", then when the main customer discontinues production of their product, I worry the part wouldn't be a priority to continue production for our poultry 3000 units a year.

author: DrG
author_rank: Super Contributor
timestamp: March 04, 2021, 03:56:18 pm
content: wouldhttps://www.crystalfontz.com/search.php?q=hdmi&submit=Searchbe of any interest?

author: mon2
author_rank: Frequent Contributor
timestamp: March 05, 2021, 03:39:25 pm
content: Quote from: IronDruid on March 04, 2021, 03:34:38 pmThose are decent volumes. Most will build you custom display assemblies @ 1k MOQ. Highly suggest for you to start dialog with some of the manufacturers overseas and share your requirements. Shout back if you need any leads - bound to have some past emails from the trade fairs. There are always aisles of such vendors who can offer you these products.

author: ajb
author_rank: Super Contributor
timestamp: March 05, 2021, 03:52:36 pm
content: Does your SBConlysupport HDMI for display? Many also support MIPI or parallel connections, and if yours does as well then that would expand your options and may also be easier to integrate into your project.You might checkhttps://www.buydisplay.com/if you haven't already, they've been around a while, have a nice selection of stock displays, and claim a commitment to long-term availability, although they don't make any specific guarantees. Not sure if they'd be willing to do a custom job at your quantity but worth inquiring, and certainly worth looking at for proof of concept/prototype parts.