Help me identify this little LCD - Page 1
Forum section: electronics / projects

author: OrangeJacketGuy
author_rank: Contributor
timestamp: June 10, 2013, 03:08:00 am
content: It appears I'm not as smart as I thought I was. I picked up this little display at an electronics thrift store called The Reuseum. I've been able to determine that it's made by 4D Systems, +5v and GND work, and when I short those "demo" pins when it starts up it goes through a nice little colorful animation with the words "Hello Darrell" repeating. No real identifying marks are seen on here other than "uLCD" and "rev3", which didn't help with my Google-fu and didn't make it identifiable on 4D's website. Throwing random data at the RX pin at 9600 baud via an existing Arduino Micro project didn't really do anything.So now I come to you guys; I am at your mercy. I need to find the model of this display as well as how to talk to it. Any information is appreciated.

author: Psi
author_rank: Super Contributor
timestamp: June 10, 2013, 03:11:32 am
content: With the demo running see if you can work out the x/y pixel resolution.That will help in figuring out what it is.It could be a clone of the nokia 128x128 color lcd. There's lots of those around.

author: OrangeJacketGuy
author_rank: Contributor
timestamp: June 10, 2013, 03:16:46 am
content: Looks like a little over 100 pixels but my eyes are strained too much to get an actual count...

author: Psi
author_rank: Super Contributor
timestamp: June 10, 2013, 03:17:55 am
content: Take a macro picture with a camera, then its easy to work out and you dont have strain your eyes.

author: David_AVD
author_rank: Super Contributor
timestamp: June 10, 2013, 03:22:49 am
content: Maybe a polite email to 4D is in order. Hopefully they'll get you the info you need.

author: OrangeJacketGuy
author_rank: Contributor
timestamp: June 10, 2013, 03:33:38 am
content: This was the best I could do with equipment on hand and some of these pixels kinda fuzz together in this pic. It does look like the dimensions are square though...

author: amyk
author_rank: Super Contributor
timestamp: June 10, 2013, 11:15:05 am
content: Looks like 132x132 to me, another common size for those LCDs.Is there any writing on the FPC or the backlight frame?

author: Psi
author_rank: Super Contributor
timestamp: June 10, 2013, 12:01:44 pm
content: I get 138 pixels wideEDIT: ops, i was copy/pasting blocks of 10 and miscounted. Yeah, its 128

author: mariush
author_rank: Super Contributor
timestamp: June 10, 2013, 12:48:55 pm
content: It's probably this one:http://www.4dsystems.com.au/product/14/59/LCD_Displays/4DLCD_144/with an added flex to serial board (probably a demo board or something)Anyway, have a look at the other lcd screens they sell in their ranges, on most of them they tell which controller is on the lcd glass.For example, for the one above they say it's a Sitronix ST7735R and they link to datasheet :http://www.4dsystems.com.au/downloads/Displays/LCD/4DLCD-144/ST7735R_V0.7.pdfAlso, since they probably use the same ICs they developed on several ranges of lcd screens, you might want to check the other serial based displays and see the initialization notes to see if yours might work the same.