Driving a LED matrix wall clock display (e.g. 64x16) from a Raspberry Pi?
That 64 x 16 display has 74HC245 74HC595  74HC138 74HC04 APM4953 type driver ICs. I.E. it is a shift register based board, with all the power and driving circuitry on board. Only thing it needs is a SPI or Bit-Banged gpio output. There are a bunch of RPI Shift Register projects, a google search will point out a ton.

A better and easier option is really a serial (or usb-serial) display. THey are bigger, and use a simple serial connection to work (you might need a ttl to rs232 adaptor).