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How do I find out the connection of the LCD I took out from a digital camera?

K

Krist Neot

Jan 1, 1970
0
In my old Olympus C900Z, it has very brilliant color display, and a
resonable
240*180 resolution. When I opened it, the connectors and everything are in
good order. Now I need to find out the connection so that I can use it in my
hobby projects. Is there a standard connection for such small LCD displays?

Thanks.
 
A

Art

Jan 1, 1970
0
Probably need to hack it a bit and see what results you experience. Maybe
post to a "Digital Camera" N/Gs?
 
K

Krist Neot

Jan 1, 1970
0
For such LCDs, is the display RAM usually implemented in the LCD panel
or the camera manufacturer implements that in his camera's circuit board?

Thanks
 
P

Peter TB Brett

Jan 1, 1970
0
Krist Neot said:
For such LCDs, is the display RAM usually implemented in the LCD panel
or the camera manufacturer implements that in his camera's circuit board?

Look at the panel's FPC (Flexible Plastic Connector). There should be
a chip bonded to it -- that's the LCDC (Liquid Crystal Display
Controller).

Anyway, the LCDC generates panel voltages from incoming data. Most
panels need something like the following:

- Parallel data (6 or 8 bit)
- Clock (anything from 500 kHz to 25 MHz)
- Supply voltages. These are often suprisingly high, and if you
connect them to the wrong pins you've got a dead panel.

I work with small LCD panels (actually, I'm busy writing HDL for a
LCDC at the moment) and I'll warn you: if you don't have a spec for
the device you're quite likely to fry it or break it in other ways
(for instance, most LC requires row-by-row voltage inversion to stop
it from sticking).

When we hook up competitors panels for testing we use a tool for
hooking into the FPC to probe the signals being sent to it. It's
pretty ridiculously expensive though.

HTH,

Peter
 
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