The LCD included in the fx-CG10 and fx-CG20 uses a Renesas 61524 LCD controller with similar functionality as the r61509. The LCD itself is 396×224 with an inner 384×216 region primarily used.
Differences Between r61509
The LCD controller hardware has changed with the V04 (?) hardware revision. The red is no longer too close to pink. The new main board is compatible with the old controller, as can be seen on a calculator that got its main board replaced with one of the newer version, but kept the previous LCD hardware.