Control circuit with write memory back voltage mechanism for LED (light-emitting diode) driving chip

The invention discloses a control circuit with a write memory back voltage mechanism for an LED (light-emitting diode) driving chip, which belongs to the field of LED display and comprises a data cache circuit, a storage control circuit, a display control circuit and a gray memory. The data caching circuit caches input gray data by taking a lamp bead as a unit; the storage control circuit writes the gray scale data of the data cache circuit into a gray scale memory and reads the gray scale data of the corresponding lamp beads in the display process; the display control circuit generates corresponding control signals in the LED display process, the control signals comprise group number and line scanning number counting control signals, the display control circuit outputs display signals according to an OS-PWM algorithm, and in the display process of each frame, the display control circuit generates back voltage signals according to the scattered group number and the line scanning number and outputs the back vo