(Datasheet added)Need help, Replace EVF micro-OLED with a big one - Page 1
Forum section: electronics / projects

author: Logan
author_rank: Frequent Contributor
timestamp: November 09, 2021, 12:57:18 pm
content: Hi.I have a EVF with OLED model ECX334A.I want to replace the micro-OLED with a normal LCD/OLED panel.Please look at the 4 pictures:1. Board with connector to host and convertor chip 358762G.2. Detail for the 30-pin host connector.3. Back of the micro OLED.4. Socket and connector for the micro OLED.I think if there's anything off-shelf compatible with either connector, it would be sweet.Or in worst case, how can I enlarge the micro OLED optically so I don't need to push my eyeball into the tiny window?Thanks.Datasheet added in the later post.

author: dmendesf
author_rank: Frequent Contributor
timestamp: November 10, 2021, 12:06:48 am
content: Didin't find a datasheet for it but found a product page for a similar unit that says it uses LVDS/sub-LVDS:https://www.sony.com/en/SonyInfo/News/Press/201805/18-049E/Probably you'll need to reverse engineer it with a scope, but as the resolution is fairly standard you can probably use a LVDS to HDMI converter:https://geekworm.com/products/lvds-to-hdmi-adapter-board-converter-with-lvds-cable

author: coromonadalix
author_rank: Super Contributor
timestamp: November 10, 2021, 12:30:06 am
content: Even if you get a bigger screen the coding is made for an X by X resolution, you wont get a better one if you resize the display, but you'll see the display better up to a point ...

author: Logan
author_rank: Frequent Contributor
timestamp: November 10, 2021, 11:02:52 am
content: Quote from: dmendesf on November 10, 2021, 12:06:48 amThank you.Mine use "RGB 24bit/YCbCr 16bit":https://www.sony-semicon.co.jp/e/products/microdisplay/oled/product.htmlCombined with 358762G, I guess it's digital, so RGB signal is likely.Do I have to get a scope for this? I don't have one...

author: Logan
author_rank: Frequent Contributor
timestamp: November 10, 2021, 11:03:38 am
content: Quote from: coromonadalix on November 10, 2021, 12:30:06 amThanks, that's what I need, just a bigger one with same resolution.

author: Boscoe
author_rank: Frequent Contributor
timestamp: November 10, 2021, 04:24:39 pm
content: It’s difficult, I have the data sheets for the A and C variants and there’s a few subtleties to the interface including some which are programmed for the application. I will be at my computer tomorrow and can send some print screens of the pin out but I cant share the data sheets as they are under NDA. I can also let you know what to look out for. I think youre definitely going to need some FPGA between this driver and the new display. It’s not an easy plug and play project.

author: Logan
author_rank: Frequent Contributor
timestamp: November 10, 2021, 04:31:01 pm
content: Thank you Boscoe.FPGA is beyond my skill levelSo will it be easier to take the signal before the 358762G, from the host?

author: ArsenioDev
author_rank: Frequent Contributor
timestamp: November 12, 2021, 10:04:56 pm
content: Quote from: Boscoe on November 10, 2021, 04:24:39 pmI'm very interested in those pinouts too please!

author: Logan
author_rank: Frequent Contributor
timestamp: November 18, 2021, 02:59:38 pm
content: Here's the datasheet of a similar model ECX334AF, I don't know what's the difference between them.Are there any off-the-shelf replacement for it?

author: ArsenioDev
author_rank: Frequent Contributor
timestamp: February 07, 2022, 04:47:32 pm
content: Oh hell yeah, been lookin for a datasheet like this for AGES. Thanks a ton!Ok, looks like it's bog standard RGB 888 or YCbCr88, so in theory if you tap those signals and break them out, should be pretty trivial to port out to a different display.

author: Logan
author_rank: Frequent Contributor
timestamp: February 08, 2022, 05:22:10 pm
content: Quote from: ArsenioDev on February 07, 2022, 04:47:32 pmThank you!Could you tell me a little bit more details, like how can I archive this? Sorry I'm not as experienced as you guys...