Controllable voltage source, shift register and unit thereof, and display

Abstract

A controllable voltage source, comprising a control module (), a storage module () and an output module (); the control module () is coupled between a high level end and a low level end; the storage module () comprises a storage capacitor; two ends of the storage capacitor are respectively coupled to the control module () to form a first terminal and a second terminal; the output module () is coupled to the second terminal, and the signal output end thereof is used to output to an external circuit the voltage signal of the controllable voltage source; the control module () responds the effective level of a first clock signal so as to enable the first terminal to be coupled to the high level end, and the first terminal is charged from the high level end; the control module () responds the effective level of a second clock signal so as to enable the second terminal to be coupled to the high level end, and the second terminal is charged from the high level end; and the first terminal is coupled to the low level end and discharges via the low level end. The effective level of the first clock signal does not overlap with the effective level of the second clock signal. Also disclosed are a shift register and unit thereof, and display based on the controllable voltage source.