S1D13781 WQVGA Graphics Controller Epson S1D13781 WQVGA Graphics Controller is a simple, multi-purpose Graphics LCD Controller with 384KByte embedded SRAM display buffer which supports both RGB interface TFT and CSTN panels. The S1D13781 WQVGA Graphics Controller supports most popular CPU interfaces in both 8/16-bit and Direct/Indirect variations.