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timecop
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by timecop »

OzOnE2k10 wrote:However, it seems we have a new player in town. And as it's Jeri, I think it will be awesome...
Do you realize that "Jeri" hasn't actually ever done anything useful?
The 2-3 things she's "famous" for, were either ripped from others and not completed and others had to be hired to finish ("her" C64 stuff), or things from old Scientific American mags (silicon transistor baking stuff, right out of some '70s or 80's SciAm).

She looks mostly like a poser/attention whore to me.

Oh, did I say I'm also dicking around with the idea of a hdmi>mipi adapter? omg.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by MSat »

timecop wrote:
OzOnE2k10 wrote:However, it seems we have a new player in town. And as it's Jeri, I think it will be awesome...
Do you realize that "Jeri" hasn't actually ever done anything useful?
The 2-3 things she's "famous" for, were either ripped from others and not completed and others had to be hired to finish ("her" C64 stuff), or things from old Scientific American mags (silicon transistor baking stuff, right out of some '70s or 80's SciAm).

She looks mostly like a poser/attention whore to me.

Oh, did I say I'm also dicking around with the idea of a hdmi>mipi adapter? omg.
You're familiar with her professional work too, or just the stuff she's publicly known for? Because it looks like it's only the latter.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by baggyg »

timecop wrote:
OzOnE2k10 wrote:However, it seems we have a new player in town. And as it's Jeri, I think it will be awesome...
Do you realize that "Jeri" hasn't actually ever done anything useful?
The 2-3 things she's "famous" for, were either ripped from others and not completed and others had to be hired to finish ("her" C64 stuff), or things from old Scientific American mags (silicon transistor baking stuff, right out of some '70s or 80's SciAm).

She looks mostly like a poser/attention whore to me.

Oh, did I say I'm also dicking around with the idea of a hdmi>mipi adapter? omg.
Dude, this is inappropriate. Its one thing to critique a project for its failures / merits. It's another thing for your first post on a forum to call someone an "attention whore". It would be a be like saying "Palmer Luckey never realised anything I could buy previously, he's a poser!". Personal attacks should not be part of a reasonable argument.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by timecop »

Wait, if I remove attention whore part and just leave the part where she hasn't actually finished a single project by herself and/or caused suffering to others/developers/etc because of that, then it's OK?

The other guy: "professional work"? You mean things like inventions/patents/published scientific/scholar work/job history that isn't jumping from one VC funded operation to another? Sure, would you mind listing some of that?
respected professional and inventor. also an avid blogger.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by the_wretched »

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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by OzOnE2k10 »

Hey, timecop,

Did you used to work for Valve by any chance? lol

I think Jeri seems to be doing quite well atm.
Lots of people's projects "borrow" work from others these days (look at Apple / Microshaft. hehe).

Always nice to see the first few posts from a new user who's being quite rude.
Brings back memories of reading comments from kids on YouTube.

OzOnE.
P.S. Not sure what the "dicking around" comment means, but I think I can guess.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by jquantum »

A little late to ask but to bring it back on topic :p


Anyone thing the new Retina displays will be eDP ports? :)

EDIT:

On the iPad Mini Retina's :P
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by urban »

jquantum wrote:A little late to ask but to bring it back on topic :p


Anyone thing the new Retina displays will be eDP ports? :)

EDIT:

On the iPad Mini Retina's :P
Hope so

Beginning to wonder if it might just be aswell 3d printing a head mount holder for the new iPad mini though. Guess it depends how heavy it is

Looks like its pretty powerful. And got the new tracking chips as well. Interesting
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by jquantum »

urban wrote:
jquantum wrote:A little late to ask but to bring it back on topic :p


Anyone thing the new Retina displays will be eDP ports? :)

EDIT:

On the iPad Mini Retina's :P
Hope so

Beginning to wonder if it might just be aswell 3d printing a head mount holder for the new iPad mini though. Guess it depends how heavy it is

Looks like its pretty powerful. And got the new tracking chips as well. Interesting
IIRC spec says 0.75lbs for the 3g version :) which is heafty but not impossible. I actually just got a small 3d printer to do parts later on (hopefully I didn't get one too small).
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by timecop »

urban wrote: Beginning to wonder if it might just be aswell 3d printing a head mount holder for the new iPad mini though. Guess it depends how heavy it is

Looks like its pretty powerful. And got the new tracking chips as well. Interesting
And whatcha gonna do with it, play angrybirds in 3D?
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by zalo »

Open it up, take the battery out, and use a heavy cutting tool to remove excess aluminum from the backside of the iPad.
Alternatively, a strong base (sodium hydroxide) will dissolve the aluminum weight from your iPad if you are uncertain about using heavy machinery.

Then replace battery with a wall power supply (3.7v) by soldering the leads to the Positive and Minus outputs on the battery.
(Alternatively, see if doing it through the lightning connector is feasible with the battery removed; there should be a bypass when for when you're charging it to preserve the battery. However you'll want 5v here.)

Congratulations, you have eliminated 3/5ths of the weight of your iPad!
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by cybereality »

@timecop: Please watch where you are going. You have all of 3 posts, and they all seem rather negative (one is even attacking a respected professional). I have given you a warning for what you said about Jeri. You don't have to worry about editing the post, I will leave it be. Just please try to be more respectful in the future.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by ripcurl123 »

OzOnE2k10 wrote:Hey, timecop,

Did you used to work for Valve by any chance? lol

I think Jeri seems to be doing quite well atm.
Lots of people's projects "borrow" work from others these days (look at Apple / Microshaft. hehe).

Always nice to see the first few posts from a new user who's being quite rude.
Brings back memories of reading comments from kids on YouTube.

OzOnE.
P.S. Not sure what the "dicking around" comment means, but I think I can guess.
hahaha that's just what I was thinking OzOnE2k10 the geezers a right plonker

cyber can we vote people out because he woulda been gone long time ago
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by 3dvison »

"And as it's Jeri, I think it will be awesome"

So timecop, you either get on board with the everything and everyone is awesome plan, or we will be throwing you out on the grounds of bullying. But only after we get a chance to bully you a bit. We need our fun also.
All this would be bad for you, because tomorrow, we will all be getting ice cream cones and an "Everyone is a winner" trophy. If there is one extra ice cream cone and trophy, that would mean there is a flaw in the Awesome plan. So can you (ACT) like a good boy, just till the day after tomorrow ? We don't want to upset all the other winners on their special day...Thank you so much timecop..you are awesome..gold star for you.

This post is just a little fun.
Cyber gave timecop a good, even toned and fair warning.
This should be over.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by Libertine »

Any new info on getting the high res display into the Rift?
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by jquantum »

Libertine wrote:Any new info on getting the high res display into the Rift?
Assume delays but someone should still be working on it.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by mickman »

Hi yas.... I've just managed to crawl out from under a stone so I'm not fully versed with where the Nexus stands in terms of the iPad Mini 2 Retina for use as an updated Rift display.

I have read that the Mini2 is more powerful & a better option as far as tablets go.. but is this the case in terms fir use in the Rift ??

What are the pros & cons ? here's a comparison http://www.trustedreviews.com/opinions/ ... -nexus-7-2
The main reason I'm interested in the Mini2 is due to the fact I have a full Unity4 iOS license.

Sorry if this has been debated at length already.. this is my first half coherent post since being carted to hospital in an ambulance after a SkyDiving accident ( I bounced hard.. real hard) leg is smashed up... was my 1st solo jump...

Anyways.. back on topic .... I'm really interested which way to go, Nexus vs Mini2 ??

P.S - Jeri I love you.... will u marry me ;)
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by the_wretched »

mickman wrote:I have read that the Mini2 is more powerful & a better option as far as tablets go.. but is this the case in terms fir use in the Rift ??
Talking only about the screen: IMO the Minis retina screen is not suited for the Rift at all. It's too large and has a less than ideal aspect ratio.

Who knows, maybe it turns out to be easier to connect to a PC in the end though - the Nexus 7 has turned out to be a tough nut to crack. The way this is going we'll have a DK2 before we have a decent Rift HD DIY mod.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by cybereality »

@mickman: Well at least you're alive. Could have been a LOT worse.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by deepsilence »

Japan Display Inc. just developed a 5.4" as well as a 6.2" lcd with 2560x1440 resolution.
http://www.j-display.com/english/news/2 ... 31024.html

Is this to any use for us, or am I dreaming big here? :)

Oh, and hi btw. I've been lurking around here for a while.
Mostly following the progress in this thread.
So it was time for me to step forward when I saw this article :)
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by mcdohl »

that works?
http://www.beetronics.ch/p/26/7-inch-hd ... or?lang=es
Resolution 1920x1080, 7 inch, hdmi and vga :woot
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by Vimax »

The beetronics display doesn't inspire very much, 500:1 contrast and a "max" resolution sounds like an older display with a max fullhd input but I could be wrong.

On the other hand I would be willing to pay 1k for the display from Japan Display Inc. with a low latency displayport solution. That would be the sweetspot replacement for me, size resolution and all.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by zalo »

The Beetronix one could work if you're willing to get down and dirty with it.

It weighs 400 grams. If you remove the speakers and separate the control unit (and throw away the case), you can probably get it to a good weight inside of the current rift.

Now contrast sucks, as does refresh rate probably. But it will be great if you want to actually read some text.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by 3dvison »

mcdohl wrote:that works?
http://www.beetronics.ch/p/26/7-inch-hd ... or?lang=es
Resolution 1920x1080, 7 inch, hdmi and vga :woot
That might be a 1280*800 screen that can scale to 1920*1080. But I am not sure.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by cegli »

Hmm... seems really unlikely that it's actually 1080p, but you never know!

Here's an english link: http://www.beetronics.co.uk/p/26/7-inch-hdmi-monitor
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by cgp44 »

I have just registered.

I am keen on the galaxy s4 mipi screen and have invested money and time towards
realising a pc display on the damn thing.

First off I think it is mipi, except it might be eDP. Probably mipi due to some C code found.

Second is dont wait for some controller to arrive, enthusists like us will have to do the dirty work.

Third we might have a breakout board. For ALL mipi devices the connector is microscopic. The
40 pin connectors are 0.4 mm spaced out. I am trying to make one from the test cable from etradesupply.
Very soon I expect success. The technique is you remove the connector with a smd removal kit (flux + soler that stays molten for ages). You then make a cradle of the thinest wires (the strands from a cheap hdmi cable). Place the wires
over the 0.4 mm spaced tab. Clue the cradle to the test cable. Then with a x14 magnifier attempt to position the
wires over the tabs. The key to fixing the soldering is to place a bead of araldite (thinkened with flour to stop flowing)
near the wires so the soldering will not move the wires. Then the theory is that solder paste on the wires should form
connections without bridging. We will soon see.

Now for the electronics, we are going to have to get FPGAed up and make a hdmi to mipi controller.
Now I have the wires out from the S4 screen 4 lane pairs, clk pair 3 pins for power and a few other unknown
wires. There are the touch controller wires on the other side of the connector but they can be ignored.

You can look up the mipi dsi details, but the S4 could do a number of variations on the dsi theme.
1) it could not need hsync nor vsync
2) I presume it is video mode, but it could be command mode
3) it could use burst mode where the data is sent compressed.

Now for the FPGA news is that a spartan 6 lx45 chip has been placed on the pipistrello board for us$145.
(at least 1/4 price of current vendors) . There is amble hdl code for hdmi serialisation stuff, and the spartan 6 has been
run at hdmi out at high resolution.

This is a good time to learn about FPGAs as they are an exciting development.

cheers

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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by cgp44 »

Oops, posted when I had not read half way thru thread!

I am amazed to hear laser edges mention of non differential signals.
Was this not a mipi interface? All signal paired wires are supposed to be differential.

Laser edge, can you give a detailed account of the signals please.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by MSat »

cgp44 wrote:Oops, posted when I had not read half way thru thread!

I am amazed to hear laser edges mention of non differential signals.
Was this not a mipi interface? All signal paired wires are supposed to be differential.

Laser edge, can you give a detailed account of the signals please.

My understanding is that non-differential signalling is used for low speed display configuration commands, but not during image transmission.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by LaserEdge »

Yes. MIPI makes use of single-ended communication. Why? High speed differential communication consumes more power. MIPI is designed to switch between the single-ended communication (LP) and high speed differential communication (HS) to conserve power whenever possible. This is why MIPI has become so popular in the mobile market. It consumes much less power than competing interfaces.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by cgp44 »

Just received my pipstrello fpga board.

On the good point about this is that we can put two hdmi to mipi pipelines in
And how about doing the warping here to free up the GPUs which will be tasked with stereo
Output.

Also I am thinking about logging the differential signals on a working Samsung s4 and analyzing the output file
To see what commands are thru put. So I need to monitor the 1.8v LPS mode and the 0.2v HS mode.

A logic sniffer project has been ported to pipstrello. I just Need to figure out how to monitor a1.8/0.2 v line.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by remosito »

deepsilence wrote:Japan Display Inc. just developed a 5.4" as well as a 6.2" lcd with 2560x1440 resolution.
http://www.j-display.com/english/news/2 ... 31024.html

Is this to any use for us, or am I dreaming big here? :)

Oh, and hi btw. I've been lurking around here for a while.
Mostly following the progress in this thread.
So it was time for me to step forward when I saw this article :)

As long as they ain't buyable in low quantities definitely no use for us. That 6.2" might be VERY good news for the Consumer Kit.

Even if available right now in low quantities it would depend on if it is LVDS, MIPI or eDP. Last time I checked there wasn't a chip that has the throughput
for hdmi/DP -> MIPI above 1920x1200@60Hz. There is a LVDS one that can do 2560x1440p@60Hz and eDP shouldn't be a problem in the
first place.

But yeah, that 6.2 incher is VERY tasty :-)
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by cgp44 »

This I why we need to bite the fpga bullet.

There is hdl code out there that is not wrapped in some startup's hopeful IP money maker scheme.

Take a look at xapp460 to see the powerful TDMS differential transmitter/reciever capability at a fraction of a spartan 6 lx45 resource usage.

Of course all luck to laser edges board venture, can he try an S4?
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by Ryuuken24 »

Why are people shooting for a 1080p display? Isn't there a middle ground. I would think a display going just above what the Rift does would be out there, or am I wrong?
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by Kernel32 »

Ryuuken24 wrote:Why are people shooting for a 1080p display? Isn't there a middle ground. I would think a display going just above what the Rift does would be out there, or am I wrong?
Hi Ryuuken24,
Rift DK1 is (vertically slightly more than) 720p. 1080p is the next step. But going beyond 1080p would be optimal. Not only resolution, also ghosting, pixel structure etc. is important.
cgp44 wrote:Just received my pipstrello fpga board.
...
I just Need to figure out how to monitor a1.8/0.2 v line.
Is it possible to monitor the 1.8/0.2 v line using regular oscilloscope?
I'm very excited about the FPGA possibilities. Please keep up the great work. Thank you!
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by cgp44 »

You need grossly expensive scopes.

This is why I am hoping that fpga logic sniffer can capture say a frame to a file.
I can then code some perl to search for known patterns. Even labView is way out of budget.

I think that fpgas are the way to go for specialized electronics, because the use of special chips
Just avoids the details which should be open sourced and current fpga chips can hold large systems. Far bigger
Than specialist chips. And the venture risk is spread over general usage.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by 3dvison »

Isn't LaserEdge coming out with a controller board for a 7inch 1080p screen soon ?
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by remosito »

3dvison wrote:Isn't LaserEdge coming out with a controller board for a 7inch 1080p screen soon ?

He's working on a board yes. How soon, only he knows. And afaik he ain't doing a 7" screen version, but the Sharp 5 and 5.9 inchers
as well as the 5.6" LG that is in the HD prototype.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by Kernel32 »

cgp44 wrote:You need grossly expensive scopes.

This is why I am hoping that fpga logic sniffer can capture say a frame to a file.
I can then code some perl to search for known patterns. Even labView is way out of budget.

I think that fpgas are the way to go for specialized electronics, because the use of special chips
Just avoids the details which should be open sourced and current fpga chips can hold large systems. Far bigger
Than specialist chips. And the venture risk is spread over general usage.
Some sort of hardware acceleration is the way future electronics will go more and more for sure.
As you mentioned, FPGA has the huge advantage of being much cheaper to setup in smaller quantities as opposed to ASIC chips, where you have to develop and manufacture the chip from ground up.

I can get you access to Faculty of Electrical Engineering labs at my university. There should be all the gear inc. labView. It's Prague, Czech R., Europe.
As electrical engineering is not my expertise, I could get you someone who will do the measurements in person for you, if [s]you[/s] we need that or set up a letter of introduction for some other edu lab.
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by remosito »

Hi LaserEdge,

thought this might be of interest to you, but some guys just put out a Kickstarter for a custom hdmi-mipi board with 9" screen. And they shot by their funding goal in like 3 days....

your board either unpaired or paired with 5.9inch Sharp Panel would sell like hotcakes. :-)

http://www.kickstarter.com/projects/697 ... me_popular
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Re: Nexus 7 2nd Gen 1920x1200. Possible drop-in replacement?

Post by Fredz »

Weird that they say that 1920x1080 LCD panels are very expensive when they can be found for less than $100 on ebay.

Weird also that they decided to make their own controller board for a 1280x800 display when you can find a LCD display + controller board for less than their price point on ebay as well.
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