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From: atn@cory.Berkeley.EDU (Alan Nishioka)
Newsgroups: sci.electronics
Subject: Need Data for Hitachi LM215 LCD display
Message-ID: <11252@pasteur.Berkeley.EDU>
Date: 19 Feb 91 06:43:09 GMT
Sender: news@pasteur.Berkeley.EDU
Reply-To: atn@cory.Berkeley.EDU (Alan Nishioka)
Organization: University of California, Berkeley
Lines: 23


Does anyone have a data for a Hitachi LM215 LCD Display?

Does anyone have data for the Hitachi HD61100 General LCD driver
or the HD61103 Graphic display driver chips that the LCD display uses?

The board has 12 input wires.  8 of these are buffered and I assume
they are data lines.  Of the remaining 4, there is a 5V and ground
(which I gather from the power to the 74LS buffer).  The other two are
probably LCD power or a contrast adjustment.  One goes into the base
of a PNP and the other connects to the collector.  This was as much
as I could gather from reverse engineering.

On another note, when I took apart an LCD calculator and put it back
together again, the display started to act funny.  At certain angles,
certain segements weren't visible or incompletely blacked out,
yet looking straight on, all 7 segements (in an eight figure) were visible.

What could cause this?

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Alan Nishioka      KC6KHV      atn@cory.berkeley.edu      ...!ucbvax!cory!atn
974 Tulare Avenue, Albany CA 94707-2540     37'52N/122'15W    +1 415 526 1818


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