Shane Hudson
Posts: 14
Joined: Thu Sep 01, 2011 12:40 pm

Re: OLED Screens

Thu Sep 01, 2011 8:21 pm

I am a software person, not hardware or electronics... I know Chinese wholesalers sell small OLED screens very cheap, but they are not HDMI or anything... just the pins.

How easy would it be to wire up one of them to work on a R-Pi?

diggy
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Re: OLED Screens

Thu Sep 01, 2011 8:32 pm

Most likely they would require a controller board to drive the screen.

Shane Hudson
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Re: OLED Screens

Thu Sep 01, 2011 8:57 pm

Ah really? Thought the GPU would do that... hmm I need to learn a lot more about the hardware side of things. I can do PCs but never looked into anything smaller than a laptop!

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abishur
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Re: OLED Screens

Thu Sep 01, 2011 9:33 pm

I think the need for a controller board will all depend on whether or not the r-pi team keeps the LVDS pins on the final board (I REALLY hope they do). If LVDS is kept, then as long as the LED screens have an LVDS connection, it could work. (I haven't looked too much into this since it's not decided yet that they will definitely be there or not)
Dear forum: Play nice ;-)

DanielSilva
Posts: 71
Joined: Sun Aug 28, 2011 7:07 pm

Re: OLED Screens

Thu Sep 01, 2011 9:38 pm

Most of those small OLED screens are serial driven so the raspi board should drive those OLED screens directly ( i have a couple of those around here ).

wallabybob
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Re: OLED Screens

Fri Sep 02, 2011 12:59 am

Some of the small cheap Chinese screens come as modules with a 4 bit or 8 bit data bus and a few control lines that can all be driven by a parallel port or enough GPIO pins. The screens I am talking about are generally character oriented (e.g. 4 lines of 20 characters each) but I think I have seen some with a graphics mode (dot addressable). The HD44780 is a common chip used to interface to these devices. Some examples can be found on the Sure Electronics web site: search for HD44780 on http://www.sureelectronics.net

scologic
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Re: OLED Screens

Sat Sep 17, 2011 10:34 pm

LVDS is a bit of a nightmare to get low cost cables. Most panel makers have different LVDS per model and with powered lvds rather than LCD inverter some lvds setups dont provied the 5v power rails.
Yes LVDS would be neater but our last set of lvds cables in small runs cost us £40 per cable..

Not ideal but lets see how things turn out.

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abishur
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Re: OLED Screens

Sun Sep 18, 2011 1:27 am

As a side note to this discussion, I was misunderstanding what the connector actually was. It's a mipi dsi interface, not LVDS.
Dear forum: Play nice ;-)

Virtureal
Posts: 3
Joined: Sun Sep 18, 2011 1:38 pm

Re: OLED Screens

Sun Sep 18, 2011 3:23 pm

I have a similar question and don't really think it deserves a whole new post, at least not until I formulate an entire project post.
I want to drive a KOPIN 320M AMLCD screen (http://www.weartronics.com/products/320M)
Would it be possible to make or use a premade driver IC drive the display with the output from either the HDMI or the Composite port?

Lakes
Posts: 267
Joined: Wed Aug 24, 2011 2:17 pm

Re: OLED Screens

Sun Sep 18, 2011 4:07 pm

Wearable Pi! :)

Pi-Eyed? lol

Virtureal
Posts: 3
Joined: Sun Sep 18, 2011 1:38 pm

Re: OLED Screens

Sun Sep 18, 2011 8:13 pm

Indeed the Raspberry Pi would be perfect for a wearable computing project as it can drive a linux distribution and still use so little power that it can last long on batteries, and the small size of the board would make it fit in most pockets.
Of course my plan is not so much to make a wearable computer as the control input of those easily becomes too limited, my plan however is to integrate the pi with a replacement thinkpad keyboard (thinkpad for the mouse) and use the screen from these wearable computers, i.e. the HMD connected to a keyboard with integrated mouse and Pi.

Rasz
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Joined: Thu Oct 13, 2011 10:28 pm

Re: OLED Screens

Fri Oct 14, 2011 5:15 am

this display needs dedicated driver

Lakes
Posts: 267
Joined: Wed Aug 24, 2011 2:17 pm

Re: OLED Screens

Fri Oct 14, 2011 11:10 am

I`m sure once the RasPi is out in the wild, someone will produce an add-on board for a (phone) touchscreen of some sort, it will probably cost more than the RasPi, but people will still buy them for their projects.

bradburts
Posts: 341
Joined: Sun Oct 02, 2011 7:07 am

Re: OLED Screens

Tue Oct 18, 2011 9:10 pm

I think that LVDS LCD cables are usually custom jobs.
What sort of bandwidth do you want?
Have a look at this, its not OLED but would it do with an LED backlight?
http://www.ebay.co.uk/itm/NXP-.....3cb8de1400
Its a development system and so the block diagrams and datasheets should be detailed & tell you what you want 2 know. Plus you may be able to track the LCD down as a standalone part.
I thought that the 320M cost a lot, suppose it was from a retailer though.

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