15.4" Wuxga Lcd Kit

[minoten]

All the information can be found here:
http://members.cox.net/minoten

Email me if your interested in being part of the group buy, you can find my contact info on my site.


Also, there are two threads with talk of the kits:
http://www.lumenlab.com/forums/index.php?showtopic=3138
http://www.diybuildergroup.com/showt...p?threadid=319 (look at the last 5 pages or so)

Thank you.

[Jim McPherson]

I'm amazed that there hasn't been any intrest in this. This is the panultimate LCD right now in projector building! I can't wait to see how they work.

-Jim

[corryn00]

Too much $$$ for most people to spend when you can get a 15" lcd monitor at staples for $200 bucks

Gordon

[minoten]

hahah I won't even try to explain how it has 3 times the pixels and offers dvi hdcp pip ....

There are now 14 people involved, more than enough for this to happen.

[corryn00]

i'm not trying to knock that it is a great panel it's just s little too expensive for most of us

I'd love to have one but i'd need to sell my kidneys to get it

Gordon

[Tekko]

Same here

[tjh]

Yeah, bit too much $$$ for me at the moment. What's the time frame on this?

Also, minoten, those are my extension pics of the ffc. I wasn't planning on it, but if you want I'll put up some better looking pics. I took those ones in a hurry and didn't bother to light it very well.

[minoten]

hey TJH,

I threw that LCD thing together today, I should have given you credit but I totally forgot, I will add it now, my apologies.

If you could take some brighter pictures that would be awesome, I had to run your pictures through a photoshop filter to brighten them, but it is still very dim. I would definately appreciate that, your the only person I know with the stripped LCD besides gazzaden.

How do you think my summary of the LCD panel stripping is? Accurate? That whole guide was definately not official, but it was kind of what I figured out from reading and looking at pictures.

The time frame...well I would like to collect the test kit money (theres currently 14 people, so like $58/person for us to get a test kit. Once ordered the kit would probably take 2 weeks to be programmed/delivered. Once I have it I estimate it will take 2 weeks to fully test it (I need to buy some electronic components to test some of this stuff, and I will probably need to buy the mouser FFC like you did)
At that point in time I would put in our order for the other orders, I am going to go ahead and say that some people are going to be interested once I post some high-res pictures of the panel in action. So we can probably add those that want to join at that point in time, and get the panels for even cheaper. So that puts us at like 2.5-3 weeks to recieve the test kit, and 4-5 weeks until I collect the money for the actual group buy for the kits. These dates arent set in stone though, just what I would like to do.


Edit: sorry if my grammar sucks, I get worked up when I write about this stuff and I just spew words

[tjh]

No worries about the credit, just took a quick look and realized how bad the pics were, figured you might want some better looking ones.

I just got into all this not to long ago, and have only stripped the Kogi L4AX, but your guide sounds feasible. Each manufacturer tends to do things in very different ways, so from what I have gathered with each screen there is always a bit of improvisation. I had a few pesky screws from this dated, 1993 build date, lcd which forced me to actually cut away the plastic around them, but for a newer model like this that shouldn't be an issue, just don't strip the screws by using the wrong screw driver

As far as the pics go, I'm gonna grab some sleep, but I'll post some better ones later today.

[Squalish]

A note:
According to the link in the diybuildergroup forum, anything over 1600x1200 requires two DVI connections. At least, that's how I read it:

To be DVI compliant, the graphics hardware must support a minimum of 25.175MHz, which is the signal frequency required to support 640x480 pixel resolution at 60Hz. Today's DVI 1.0 spec specifies a maximum single-channel bandwidth of 165MHz. This is good enough to support a 1600x1200 display in most cases, including CRTs refreshing at 60Hz.

* Projector Torture Test: LCD versus DLP
* The Biggest LCD Panel Ever
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Note that some LCDs may require less stringent blanking interval timing. A blanking interval is the time it takes for the display to start displaying the next frame or field. CRT's often require fairly high blanking intervals, so the electron gun can realign to the start of the refresh cycle. LCD flat panels often require smaller blanking intervals, but not all LCD blanking intervals are the same. The standard requires a miminum spec of 5% blanking interval for LCD displays, but if the blanking interval is longer, somewhat higher bandwidth may be required. You can theoretically "get away" with a clock rate of around 142MHz, if you assume a 5% blanking interval -- but hardware that will only support 142 MHz for 1600x1200 is skating on thin ice.

DVI is based on the TMDS (transition minimized differential signaling) electrical protocol. TMDS is a differential signaling scheme that encodes pixel data and ships it over a serial link that typically consists of three to six data channel pairs plus a clock channel pair. Note, however, that DVI can support alternative media, such as fiberoptic transmission. (For more gory details on the DVI standard, you can actually download the DVI 1.0 spec from the DDWG web site.)

If you move to two DVI channels, then the standard allows for even higher bandwidth. Dual-link DVI graphics cards today (such as nVidia's Quadro FX series) can support up to 330MHZ, which can easily handle 8 bits per pixel up to 2048x1536. A card with two DVI channels contains two TMDS transmitters and two DVI connectors. These two connectors can be used to either connect two different digital displays, allowing the user to have a dual display system. Alterntaively, they can be used to connect to a single display device that requires a lot of signal bandwidth. Note that 2048x1536 (aka "QXGA") will only require 240MHz of signal bandwidth in typical cases, but that's still more than the 165MHz maximum bandwidth that one DVI channel can deliver. If you want to use an ultra high resolution display, like Viewsonic's VP2290b, then you'll need graphics hardware with two DVI transmitters.

Does this mean we need to have some funky Dual-link workstation card to use this? Would a 6800gt with two DVI ports do? Perhaps a pair of 6x00 SLI cards?