LCD panels

[Tinker]

The polarizers in a laptop are no dif then a portable lcd tv. Prob. is they dont convert the polarity just reflect it, well the film does. Then the lcd polarizers which they all have (wouldnt work without!) absorb the wrong polarity making heat and dimmer pic. The reason a laptop is lit from side but apears evenly lit is also like lcd tv's. They use a prism film and light pipe to spread the light evenly. Does about the same as a fres. just side to front not front to back... So the polarization not only takes a polarity reflective film to work, but also relys on a sealed tight, close reflector also, as it uses the reflector to bounce the beam around untill light polarity changes. Then the film passes it. This is called light recycling.

[uvodee]

I alos found
www.guadrangleproducts.com

they seem to have a large amount of different sets to hook up panels (you know the one that were on ebay for 1 penny ( the nec nl6448ac33-18 and the sharp LQ10D32A... both look very similar anyway i bought them form some misses on Ebay some months ago.

I am gonna call quadrangle in the morning and find out how much of my arm and leg they charge for the set.

[remp]

Just thinking out loud about how to interface a lcd panel with no driver board to a video card. As many know there are hundreds of panels available cheap without driver boards. Good specs too.

Some video cards put out analogue only most of us I guess, but some put out analogue and digital to prepare the way for full digital between the computer and the monitor when ever that happens.

I read this somewhere but all thats required assuming you have a video board which puts out dvi then all you need to hook up to a LCD panel with no driver is a compatible "receiver board".

Assuming this is true you have a video card doing most of the heavy duty digital work, puts that out on the dvi outlet and you find a receiver that mates with the LCD panel so the video card and the LCD can communicate

Sorry if I pinching somebody here's info. Dont mean to.

Be worth checking how much for a video card with DVI included
If thats at all reasonable
Next step look into receiver boards and what panels they support
and how much they cost.

Its a round a bout way to get an LCD panel but worth investigating because ebay projection panels are starting to get very expensive.

[uvodee]

is DVI like a superior of inferior DVIx or is this something completely different

i have something that uses DVIx as i downloaded some months ago software to copy dvd's and the result is vcd (still very good) and one of the softwre steps was DVIx ....

[uvodee]

Well DVI out can be foudn on some later Radeon and ATI video cards...
is that what you think could do the trick?

[uvodee]

A video card with DVI out can be bought : US$70 for the radeon 7000, $100 for the Radeon 7500 and $160 for the Radeon 8500 Pro with a stunning 275 mhz video processtime and 64 mb ddr

[remp]

uvodee

Thats amazing processing power. Not too expensive either.

Point is all LCD's work on digital signals.

The projection panels we buy have an analogue front end so we can hook them up to an analogue source such as video in which is analogue, or connect them to our computer which is usually analogue. Then the panel changes the analogue info into digital.

A video card with digital out can communicate directly with the digital input of a lcd that has no analogue driver board so step one sounds ok.

Now we need a "receiver card which takes the digital from the video card and makes it suitable for the LCD panel. Thats the bit we don't know about at present. The receiver card.

[remp]

I did a google search for lcd receiver

Many lcd's with tv receivers but two links which help along the way.

Here is a link showing an IBM LCD panel with a receiver mounted
on the back of an LCD panel. Its nothing special just a line drawing showing a box stuck on the back of an LCD. First time I have seen anything like a receiver.

www.pc.ibm.com/qtechinfo/ MIGR-4KCPEG.html?up=unknownuser


This link is asking for some transmitter/receiver boards. Maybe that person could be contacted by email for more info. Might have some transmitter/receiver boards for sale. Or perhaps help with some information.
www.eio.com/public/lcd.1998/0645.html

It is possible we need a bit more than a video card with digital out. This last link talks about a transmitter board as well as a receiver board.

Since I don't know very much at all about driving a LCD that has no driver board its a bit hard to undrstand the information but one thing is for sure, There are good panels to be had, you can buy a ready made driver board for $200 - $250. What we need is to find a cheaper way to do it.

[remp]

Google search lcd transmitter receiver

This showed a number of sites describing connecting to an LCD panel using a transmitter board and a receiver board and describes the better pix quality. Ie digital operation rght through

This link has a starter kit.

www.siimage.com/products/display.asp

[moses]

No, there is no way to hook up a controllerless LCD with a DVI port. Not without a lot of electronics. As for pinouts, I can probably get them for you, but they won't do you anygood. You will have probably 4 or 8 data bits, a frame start, a data latch pulse, and a data shift pulse. Plus your grounds, driving voltage, and occasionsally a LCD off pin. There is no way just to hook it up to a parallel, seriel, or ISA expansion slot, as it requires too much bandwidth. Specifically it requires the horizontal resolution times the verticale resolution time the color depth. Just for an example 320x200x8, QVGA. Most of your LCD's require that this data be transmitted 60 times a second. So you have, just for that little baby screen, 30Mb/s. There isn't a way of taking a "digital" signal to drive the LCD directly off of most video cards, as most video chipsets don't provide the nessacary(sp) lines to drive a LCD. If you have a older Chips and Technogoly video card, you might be able to drive a LCD off of it. However your LCD configuration data is generally stored with the video BIOS, and you would have to find a way to hack the BIOS to the point where it would work with your specific LCD.

DiVX( or rather DiVX ;-)) is a high compression lossy video codec based off of MPEG4. It isn't made to copy DVDs, it just often is used in copies because of it's extremely efficient copies. It can very easily exceed VCD quality(which is a terrible MPEG1 compression). DVI is a digital video interface, that can provide both analog and digital video, depending on which DVI interface you have. It doesn't generate LCD timing signals.