854x480 HDMI Display? - Page 1
Forum section: electronics / general

author: gudenau
author_rank: Regular Contributor
timestamp: November 30, 2016, 08:21:15 pm
content: I have a project that I would like to do that requires a fairly small 854x480 60Hz display. It needs to have HDMI and be around 6-7" large. A touch panel on top is not needed, but it would be a nice touch. I can always add that later I presume. It does not need to have a shell, a plain panel and driver board would be better since I will make my own enclosure for it.(I did not post this in the shop section because the wording made me think I shouldn't post there)

author: frenky
author_rank: Unknown
timestamp: December 01, 2016, 02:33:31 pm
content: I have one similar spec'd for rpi:http://www.ebay.com/itm/Pi-3-Model-B-Touch-Screen-LCD-Display-5-Inch-For-RPi-2-3-B-HDMI-800x480-/291956277068?hash=item43f9f33f4c:g:-3EAAOSwB09YO-6w7" from sainsmart:http://www.sainsmart.com/sainsmart-capacitive-7-inch-touch-screen-tft-lcd-module-hdmi-800x480-for-raspberry-pi-3-2-model-b-and-rpi-1-b-a-bb-black-pc-various-systems-sc7b.htmlI believe most of this lcd are from Waveshare:http://www.waveshare.com/catalogsearch/result/?q=hdmi

author: gudenau
author_rank: Regular Contributor
timestamp: December 01, 2016, 05:50:57 pm
content: Quote from: frenky on December 01, 2016, 02:33:31 pmThose are missing 54 columns though. :-/

author: gudenau
author_rank: Regular Contributor
timestamp: December 03, 2016, 05:16:33 am
content: It would appear that a TD070WGCB2 display would work for this, could anyone verify this or have any issues beyond the lack of driver? That shouldn't be that hard to find/make as far as I know.

author: NiHaoMike
author_rank: Super Contributor
timestamp: December 03, 2016, 07:14:39 am
content: Any reason for that oddball resolution?

author: Howardlong
author_rank: Super Contributor
timestamp: December 03, 2016, 08:20:06 am
content: Quote from: NiHaoMike on December 03, 2016, 07:14:39 amI was wondering the same thing, but it turns out it's 16:9, "FWVGA" is the acronym. Seemingly it has been commonly used in mobile phones.The more common 800x480 WVGA is 5:3.

author: gudenau
author_rank: Regular Contributor
timestamp: December 03, 2016, 05:23:08 pm
content: Quote from: Howardlong on December 03, 2016, 08:20:06 amIt is 16:9! I want wide screen but other limitations in my project will prevent a more standard resolution. :-/

author: gudenau
author_rank: Regular Contributor
timestamp: December 05, 2016, 04:21:58 am
content: Would something like this work?

author: Howardlong
author_rank: Super Contributor
timestamp: December 05, 2016, 06:41:04 am
content: Quote from: gudenau on December 05, 2016, 04:21:58 amPossibly, the physical parallel I/O looks like it may be reasonably compatible with the TD070WGCB2, but what's not clear is how the 852x480 resolution is communicated to the host via HDMI EDID, but your host can often override those settings anyway.

author: daveshah
author_rank: Unknown
timestamp: December 05, 2016, 12:48:38 pm
content: Quote from: Howardlong on December 05, 2016, 06:41:04 amThere's an EDID EEPROM on that board that would need to be reprogrammed manually - they breakout the I2C so you could use an Arduino type device but with the right software and GPU support you could reprogram it over the HDMI DDC connections.

author: gudenau
author_rank: Regular Contributor
timestamp: December 05, 2016, 04:59:35 pm
content: Quote from: daveshah on December 05, 2016, 12:48:38 pmI'll try and find out if the manufacturer of the Adafruit panels has one for my project. Haven't been able to really find a web page though. :-/