Patent ID: 11955059
Assignee: FORTH DIMENSION DISPLAY, LTD
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A system to drive sub-pixel micro-light emitting diodes (mLEDs) of a micro-LED (mLED) display, comprising:
a sub-pixel mLED having an anode and a cathode;
a sub-pixel mLED current control transistor, configured to output a drive current;
a sub-pixel mLED enable transistor, an input of the sub-pixel mLED enable transistor coupled to an output of the sub-pixel mLED current control transistor and an output of the sub-pixel mLED enable transistor is coupled to the anode of the sub-pixel mLED;
a switchable pre-charge voltage, the switchable pre-charge voltage injectable between the sub-pixel mLED current control transistor and the sub-pixel mLED enable transistor;
a switchable clamp voltage, the switchable clamp voltage injectable between the sub-pixel mLED enable transistor and the anode of the sub-pixel mLED; and, a sub-pixel control module, the sub-pixel control module configured to drive the sub-pixel mLED as follows in order:
A. sub-pixel mLED OFF state, the switchable clamp voltage is switched ON;
B. sub-pixel mLED ON state, the pre-charge voltage is switched ON for a first period of time and the sub-pixel mLED enable transistor passes the drive current to the sub-pixel mLED for a second period of time, where the first period of time overlaps with the second period of time and the second period of time is longer than the first period of time.