How to port lvgl to small ram device with e-ink screen

How-to
1

  1. I want to support an e-ink screen on LVGL, which has a pixel that only occupies one bit

  2. My device’s RAM is very small, only 72 Kbytes

  3. The e-ink screen only supports full-screen refresh, not local refresh. The e-ink screen is 400300, and the data length of one frame is 400300/8 = 15000 bytes

4.I found that LVGL does not support one pixel per bit, the lowest configuration is one pixel per byte, because the e-ink screen does not support local refresh, it can only be refreshed in one frame, but if one frame is calculated per pixel per byte, it is 120000 bytes, which exceeds the RAM of my device.

How should I handle it to display normally with LVGL?