How do I find out the connection of the LCD I took out from

[Krist Neot]

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.

 

[Art]

Probably need to hack it a bit and see what results you experience. Maybe
post to a "Digital Camera" N/Gs?
"Krist Neot" <Krist_Neot@hotmail.com> wrote in message
news:42a5306c$1@news.starhub.net.sg...

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.

 

[Mike Harrison]

On Tue, 7 Jun 2005 05:55:57 -0400, "Art" <plotsligt@comcast.net> wrote:

Probably need to hack it a bit and see what results you experience. Maybe
post to a "Digital Camera" N/Gs?
"Krist Neot" <Krist_Neot@hotmail.com> wrote in message
news:42a5306c$1@news.starhub.net.sg...
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.



At the smaller end there is probably little standardisation, and for cost-sensitive products like

this, strange/custom interfaces are quite likely to be used to optimise cost.
if the cam still works, you should be able to determine a lot of the pinouts with a scope - e.g.
waveforms that change as the image changes will be data, that will probably leave a fairly small
number of timing signals to figure out.

 

[Krist Neot]

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



"Art" <plotsligt@comcast.net> wrote in message
news:RMGdnR2nZbGy8jjfRVn-uw@comcast.com...

Probably need to hack it a bit and see what results you experience. Maybe
post to a "Digital Camera" N/Gs?
"Krist Neot" <Krist_Neot@hotmail.com> wrote in message
news:42a5306c$1@news.starhub.net.sg...
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.

 

[Peter TB Brett]

"Krist Neot" <Krist_Neot@hotmail.com> writes:

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

--
E-mail: peter@peter-b.co.uk
Website: http://www.peter-b.co.uk

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