what does it mean for EOMA that small high res displays are switching to MIPI?
Context: I was chating to some techys and that was a problem with the display interface of EOMA but then I think I said eoma was lvds when it's this rbg/ttl thing. I got confused. I did say eoma was rbg/ttl later but I didn't get a reply regarding that so I don't know. I don't know what I'm talking about hardware wise. (I did tell them.).
On Thu, Apr 10, 2014 at 5:29 AM, Alexander Stephen Thomas Ross maillist_arm-netbook@aross.me wrote:
what does it mean for EOMA that small high res displays are switching to MIPI?
if you look at the list of available LCDs on http://panelook.com, go to "Advanced", select "MIPI" interface (top right), you see that on the world's largest web site which lists LCD panels globally available there are *only* 180 MIPI panels listed. that's gone up in 1 year from around 85 [gosh!! a 100% increase! woooow :) ]
by contrast if you select LVDS that number goes up to 1,900.
if you select Parallel RGB (which automatically gives you all the 480x272, 800x600 and 640x480 LCDs) that number is over 700 LCDs.
remember however that EOMA is *NOT* "a single standard". EOMA68 is targetted at one market, other EOMA standards are targetted at others.
so once we get going (once there are some sales of the EOMA68-A20 CPU Card) we will have the cash to fund "high end" prototype cards that will take advantage of the MIPI / eDP standards.
l.
ok, I get it. :)
I see I've made the mistake for referring to the general eoma standards when I was asking about a particular one - eoma-86!
so in summary small screens that are eoma-86 compatible are only low res ones.
I guess eoma-cf would be higher end?
Thanks again.
On Thu, Apr 10, 2014 at 3:25 PM, Alexander Stephen Thomas Ross maillist_arm-netbook@aross.me wrote:
ok, I get it. :)
I see I've made the mistake for referring to the general eoma standards when I was asking about a particular one - eoma-86!
68
so in summary small screens that are eoma-86
68
compatible are only low res ones.
yes, meaning that a low-cost device based on an EOMA68 CPU card would actually *be* low-cost, by virtue of not needing:
a) an ultra-expensive screen b) an ultra-expensive converter chip (e.g. MIPI to RGB/TTL)
for larger screens ($20 to $25 for a 7in 1024x600 or $25 to $30 for a 10in 1280x800) these are typically LVDS and we may add $1 for an SN75LVDS83b RGB/TTL-to-LVDS converter IC without too much fuss.
by the time you get to Dual LVDS these are quite expensive relatively speaking as well and the cost of RGB/TTL-to-Dual-LVDS converter ICs again may be absorbed.
I guess eoma-cf would be higher end?
yes. i think there, specifying MIPI or eDP is probably a good idea because the kinds of CPUs that will go in such a small package are those in embedded mobile space anyway.
l.
arm-netbook@lists.phcomp.co.uk
-
Alexander Stephen Thomas Ross -
Luke Kenneth Casson Leighton