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Does anyone know if it would be possible to put in a different screen? Is there a universal cable that runs from the controller board to the LCD screen? The eee has the room in the chassis, with modification, to put in an 8.9" 1024*600 screen, as seen here. But would it be electronically possible?
Thanks!
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Costs would be too big, I'll wait till they release it...
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It would probably be too power-consuming for the power given to the screen, and it would need some serious case modding.
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TacticalPenguin wrote:
It would probably be too power-consuming for the power given to the screen, and it would need some serious case modding.
Well thats the fun part!
And yeah I found a price... touchscreen version is about 250 USD 
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Possible? Yes... Feasible? No.... Cost/Trouble out-weigh any benefit.
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Yeah the main problem is the connector. AFAIK there really is no ISO standard. I don't know if I personally would go bigger, I mainly want a higher resolution. I saw something about another laptop with a 7" screen that had a res of about 1024x 640 or something along those lines.
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Kingcodez wrote:
Yeah the main problem is the connector. AFAIK there really is no ISO standard. I don't know if I personally would go bigger, I mainly want a higher resolution. I saw something about another laptop with a 7" screen that had a res of about 1024x 640 or something along those lines.
Ouch - the screens hard enough to read at 800 x 480.
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But, if you could get the same manufacturer's larger model (maybe in the same model range?) you might find it had the same connector...
...or not...
..maybe...
..errr...
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Presuming you can find a screen that will fit in the case it should be possible. What you will want is a screen that normally hooks onto the vga connector; this way you can directly solder the wires to the vga pins on the mobo. If you're looking for a screen with touch support be sure the tou7ch is read through usb and not a standard serial.
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Kingcodez wrote:
I saw something about another laptop with a 7" screen that had a res of about 1024x 640 or something along those lines.
The Samsung Q1 Ultra has a 7" 1024x600 screen. That's about 170 ppi. I saw one at a store yesterday. It seems ridiculously teeny. The OQO model 02 "handtop" is 5" at 800x480, 187 ppi, even worse.
The eee is about 133 ppi. By comparison, a regular 19" 1280x1024 is 86 ppi, a 20" 1600x1200 is 100 ppi. A 13.3" Macbook is 1280x800, and is 113 ppi.
Have fun at this ppi and dot-pitch calculator: http://www.thirdculture.com/joel/shumi/ … icalc.html
Dan
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dhalbert - thank you. I've gotten tired of people whining about the eee having such a low resolution when it's ppi is actually rather high - i just hadn't gotten tired of it enough to make a post like that.
Last edited by TacticalPenguin (2007-11-01 9:43:39 am)
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It is electrically possible to connect almost any LCD. If you just have a bare LCD panel you need to connect the red, green and blue lines (there are different numbers of red green and blue signal lines depending on how many bits of colour you have) and at a minimum the horizontal and vertical clocks, and probably at least one of the frame or pixel clocks. Different LCDs may have different input voltages and draw different currents though. There is normally also an enable line and a contrast line.
You will probably need a custom cable, unless you find one from the same manufacturer with the same pinout (as Jon suggested).
You will also need to make sure you have a backlight inverter that will work with the new LCD, and that you can power that (you may be able to use the existing one from the old LCD).
If you want to use a touchscreen you will need an interface to the computer. If it is a resistive touchscreen (and most are) this is basically just an analogue to digital converter (ADC). You can get fairly simple touchscreen ADC chips - you may even be able to wire the touchscreen to the laptops sound card or something like that (some sound cards also have spare ADC lines for touch screens). You could make the touchscreen ADC work over a serial or USB port quite easily - there may even be chips readily available that are connected in this way.
In terms of VGA, that is a different standard (analogue) and using this will probably make your life much more difficult - LCDs with VGA have a circuit in them that converts the analogue VGA signals into the digital interface I have described above. So using a VGA input LCD means that your graphics card is producing digital video output, converting it to analogue for your VGA port, and then your LCD is converting it from VGA back into digital for the LCD again - a waste of time! These LCDs are also more expensive, bulkier, and use more power - at the end of the day they are a plain LCD panel with the extra VGA converters, power regulators and a plastic housing etc added on - all stuff you dont need. On the other hand, at least VGA has a standard connector!
Have fun, and let us know how you get on. ;-)
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Digital LCD c onnections don't use RGB and H/V Sync lines, that stuff is all VGA. Digital connections (all laptops use a direct digital cable) use various forms of an LVDS signal. Some manufs even use miniature coax cables to carry the LVDS signal. I've seen microscope pics of some Apple laptop cables and what looks like regular wires to the naked eye are actually coax cables. Really there is no way to swag this well without knowing the exact model of the current LCD panel and what cable it uses to conect.
Last edited by JDP (2007-11-03 11:44:15 am)
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Lower end might have just RGB and V+H.
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All colour video systems that I am aware of, both digital and analogue, use rgb and sync lines (in analogue called hsync and vsync, but in digital generally called the line and pixel clocks).
Most low res laptops, pdas and sub-notebooks use direct TTL or CMOS levels for the signaling, for example an 18-bit colour interface will have 6 connections/wires for each colour (r0-r5, g0-g5,b0-b5), giving a 6-bit digital value for each colour, as well as separate digital frame, line and pixel clocks.
LVDS signalling is used in FPD-Link, LDI and OpenLDI video interfaces inside some laptops, but this is more-or-less an encoding of the above signals on to 4 serial lines (one for each colour and a single clock) and is therefore still 'rgb'. The advantage is that there are fewer cables to go through the hinge, and because it uses differential signaling it is more noise immune (and can go longer distances).
VGA uses an analogue voltage value to represent each colour (red green and blue, rgb), and additionally analogue horizontal and vertical syncs or clocks.
I have a hunch that the eeepc will use CMOS/TTL as most low end machines do, but I guess some sort of LVDS is a possibility. It may be possible to tell which just by looking - LVDS uses far fewer wires!
Last edited by Ed_Ca22 (2007-11-06 6:22:18 pm)
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http://www.tweaktown.com/articles/1213/ … index.html
Wondered if this would help with identifying the LCD.
S
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Much better inside pics are here: http://forum.notebookreview.com/showthread.php?t=184267
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TexasGuy wrote:
Much better inside pics are here: http://forum.notebookreview.com/showthread.php?t=184267
Wait... On that forum is says
http://forum.notebookreview.com/showthread.php?t=184267 wrote:
Now just pop out the RAM, and replace it with either a 1GB or 2GB DDR2 667MHz replacement.
I thought the eee was only upgradable to 1Gb... Anyone know which is true?
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You can physically slap a 2Gb in an e3, but the default OS recognizes up to 1Gb.
Windows XP recognizes up to 2Gb.
Windows Vista X86 recognizes up to 4Gb...
Yar?
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Hahutzy wrote:
You can physically slap a 2Gb in an e3, but the default OS recognizes up to 1Gb.
Windows XP recognizes up to 2Gb.
Windows Vista X86 recognizes up to 4Gb...
Yar?
oh neat. I didn't know that! so if install ubuntu I can use the a 2gig ram stick? sweet
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I'll be looking into this once I receive my EEE and give it and give it a good work through to make sure I don't need to cash in the warranty.
I have dead Lifebook P1120 that I'll look into retrofitting the screen and touchscreen from onto the EEE. I need to find the model number back of this LCD, and see if I can find a datasheet for it.
Anyone know the model of LCD in the EEE? If you're not shy about opening your EEE, it should be written on the back of the LCD module. Finding out the information on the two should allow an adapter cable to be made, as well as additional BIOS and/or software changes that may need to be made, if they are of compatible types.
Edit:
The LCD in the P1120 is a LTM09C362F, which I can't find a datasheet or pinout for. It seems to be very similar to theLTM09C362Z model, but I can't find pinout information for it either, only that it is 6-bit RGB(18-bit total) LVDS.
Last edited by tom61 (2007-11-10 5:39:25 pm)
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QUESTION:
is it possible to hack a 7" tft into the eeepc with a higher resolution?
because resolution matters more to me than the physical size of the screen!
(1024 would be nice)
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I am considering a project where I transfer the guts of a Eee from the fragile case to a
gutted Panasonic Toughbook CF-27.
What information do I need about the CF-27 LCD to determine if it will interface with
the Eee, please?
If I cannot use the CF-27 LCD I will have to fabricate a frame to hold the smaller Eee
LCD - something that I'd rather avoid.
Thanks! doc
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edoc wrote:
I am considering a project where I transfer the guts of a Eee from the fragile case to a
gutted Panasonic Toughbook CF-27.
What information do I need about the CF-27 LCD to determine if it will interface with
the Eee, please?
If I cannot use the CF-27 LCD I will have to fabricate a frame to hold the smaller Eee
LCD - something that I'd rather avoid.
Thanks! doc
You'll need a full datasheet for the display. Pinout, interface type, and timings will be needed.
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OK, am working on that.
Does the Eee have an output for an external monitor?
Thanks! doc
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