Well, the TC5565APL is static RAM, and next to it is the blank, so that probably was ROM, or "maybe" more RAM, but without a company printed on the board somewhere, or accessible code on board which might give an idea as to usage, I'd say you got about $3-$5 worth of good embedded design parts, in the chips and LCD display!
P.S. IS there a company or LOGO printed on the board? That might tell us a little more about what this controller does/did???
gwk