- Sony ACX705AKM LCD users/ spec questions?
- Posted by Bo on March 8th, 2006
We are planning to use this LCD in an embedded project with a Gumstix
processor and I am having more than a little trouble getting support from
Sony.
The 1st problem is knowing how to drive the LED backlight.
The spec simply says 15mA current source, but it does not give any details
about the forward drops in the backlight. So I don't know what the minimum
voltage is.
If anyone has used this LCD successfully and can provide details on how to
drive the backlight I would be grateful. I would like to drive it from my 5v
switcher if possible--or raw Li Ion 8.4v if 5v is insufficient. If 8.4 isn't
enough, guess I'll be adding another switcher.
Also, the spec is ambiguous (I'm being generous here-- it actually has no
info) as to the logic levels expected on the S/D pin.
The spec is here:
http://www.sony.net/Products/SC-HP/c...pdf/acx705.pdf
Suggestions? (other than contact Sony--- the have no tech support folks/FAEs
and even trying to find a direct support phone number has been fruitless).
Thanks,
Paul
- Posted by linnix on March 8th, 2006
Bo wrote:
My guess is 50V (0.75W) to 100V (1.5W).
5V will give you 0.075W, just a little better than no light.
You need to look for a step up DC/DC.
- Posted by Paul Carpenter on March 8th, 2006
On Wednesday, in article
<966f4$440f0348$18d6ec55$12527@KNOLOGY.NET> bo@cephus.com
"Bo" wrote:
Do you have a variable bench supply with a settable current limit?
Also with current metering?
Set current limit to something like 12mA, slowly and carefully bring power
up from 0V to about 3V and note current drawn and work it out for 5V or
what ever it is and do CAREFUL experiments.
--
Paul Carpenter | paul@pcserviceselectronics.co.uk
<http://www.pcserviceselectronics.co.uk/> PC Services
<http://www.gnuh8.org.uk/> GNU H8 & mailing list info
<http://www.badweb.org.uk/> For those web sites you hate
