Help: LCD with TEC chip

[Sala Massimo]

I have a LCD with these 3 ic:
HD44100h
HD44780a00
TEC EC-A739 634 ???

The LCD has a cable with 5 signals:
brown = +
green = GND
red = PIN 7 TEC EC-A739 634
orange = PIN 41 TEC EC-A739 634
yellow = PIN 43 TEC EC-A739 634

What is the TEC ?

ciao, Massimo
ITALY