TFT Read Out Panel

This link will take you to the section of the RS website listing colour LCD panels. Manufacturers are listed.

Thanks a lot!

I have seen sites like this before and they are containing information about TFT Panel Displays.

That I need is Read Out TFT matrix. In other words I need to "dump-over" the charge accumulated on pixel-pads and capacitances associated to them and in that way detect/capture the image. It is well illustrated here: http://beaune.in2p3.fr/sessions/chabbal.pdf.

There are a lot companies who sell complete detectors but I do not have any use of them. That is because the A-Se layer is already attached and prevents the charges from my converter-step to reach pixel-capacitances.

I tried to ask them where they by their TFT matrix panels but did not get any answer. Probably, they are not interested to "support" my R&D and that is why I am trying to find manufacturers in this way.

I apologise for not having read your post carefully enough.

I'm afraid it looks as if the companies producing the complete imaging systems seem to have tied up the manufacturers/suppliers of the sensor panels. I'll have a word with some people I know in the area (though it won't be soon, due to pressure of work in other directions) - if I learn anything useful, I'll let you know.

Unfortunately, I have no way of contacting you. If you register & send me a private mail, I'll be able to get back to you.

Sorry again, & best regards,

John

A number of LCD manufacturers make bare TFT panels available. Incidentally, I was in the same business at one time - we were doing selenium / TFT detectors and also selenium / LCD detectors at Litton Systems in Toronto.

Your best bet would be to talk to Sharp, Toshiba and a few of the other companies to see if they can make bare TFT panels available. Otherwise, you could buy a complete LCD and remove the top glass and liquid crystal material. This might be easier for a low-budget development program.

Thanks!

I had the same idea but could not clue out how to remove the liquid crystal layer without damage of TFT matrix. Did you, may be, try it before?

Best regards

I have seen people "adjust" the size of a standard TFT panel by freezing it and using a diamond saw to cut around the edge. Where there are only two sides the electrodes connect to, this can be used to make a display that will work in the confines of an aircraft instrument without having to get a custom size made. The top layer of glass is spaced off the TFT panel by plastic or glass spheres. The glass can be removed, the liquid crystal material and the spheres washed off and you have a bare TFT substrate that you can evaporate selenium onto. You then evaporate an ITO (indium-tin oxide) electrode onto it to apply the initial charge.

There was also an X-ray sensor made from a large LCD. Selenium was evaporated onto an inner electrode and the LCD was charged. After X-ray exposure, the charge declines and although there is only a limited dynamic range for any given scan, build-up of successive scans can produce a large dynamic range. The LCD has to be scanned optically to make this work.