Hi!
Probably your display does not have an on-board graphic controller.
LC7940 segment driver:
http://www.techwiz.ca/~peters/projec...ND_1-11_11.pdf
LC7942 common driver:
http://www.techwiz.ca/~peters/projec...42ND_1-6_6.pdf
Similar display WITH built-in graphic controller T6963C,
LC7940 segment drivers and LC7942 common driver:
http://www.powertip.com.tw/product/P...%2024064-D.pdf
Regards,
Luciano
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