Patent ID: 11922873
Assignee: BARCO N.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A driver circuit or current control circuit for an active matrix display to drive pixels or sub-pixels of the active matrix display, the driver circuit or current control circuit comprising:
a control element with a first control electrode, the first control electrode being configured to control flow of current through a light emitting element;
a first storage element to store a first value of a control signal, said control signal being applied to the first control electrode of the control element;
a second storage element to store a second value of the control signal; and
a transfer element with a second control electrode to load the first storage element with the second value of the control signal,
wherein the number of bits stored by the first storage element and/or the second storage element is less than the bit-depth of the resolution of the control signal;
wherein the driver circuit or the control circuit is configured to modulate the current in the light emitting element in function of N1 bits+N2 bits, the N2 bits having less weight than the N1 bits; and
wherein the driver circuit or the control circuit is configured:
to control for each of the N1 bits the current in the light emitting element by said N1 bits, one bit at a time and during a time interval with a duration of at least TMin, and
to control for each of the N2 bits, the current in the light emitting element by said Na bits, one bit at a time and during a first time interval that is less than TMin, and to override said one of the N2 bits during a second time interval that is less than TMin, the sum of the duration of the first time interval and the second time interval being equal to TMin.