Abstract: Methods, apparatuses, and systems to control current through a sub-pixel micro-LED (mLED) of a mLED display using a dynamic current mirror are taught. A dynamic current mirror is shifted to phase zero. Phase zero includes establishing a first voltage for a sub-pixel mLED control transistor. The first voltage is produced using a predetermined reference current. An energy storage device used in the sub-pixel mLED is charged to the first voltage during phase zero. The dynamic current mirror is shifted to phase one. In phase one, the first voltage is used with the sub-pixel mLED control transistor to pass an illumination current through the sub-pixel mLED.
Type:
Grant
Filed:
April 4, 2024
Date of Patent:
July 14, 2026
Assignee:
FORTH DIMENSION DISPLAY, LTD
Inventors:
Christopher Robert Chalmers, Debra Jane Lefley, Jason Darren Drew, Jedrzej Nowakowski, Neil Mallory, Ruiyan Zhao
Abstract: Method, apparatuses, and systems are described to display image data to a sub-pixel within a micro-LED (mLED) display. A sub-pixel image data value is stored at the sub-pixel. The sub-pixel is turned to an ON state. A shared row counter value is provided to the sub-pixel. The shared row counter value and the sub-pixel image data value are compared at the sub-pixel. The sub-pixel is turned to an OFF state if the shared row counter value is equal to or greater than the sub-pixel image data value.
Type:
Grant
Filed:
April 5, 2024
Date of Patent:
January 6, 2026
Assignee:
FORTH DIMENSION DISPLAY, LTD
Inventors:
Christopher Robert Chalmers, Mladen Panovic, Debra Jane Lefley, Jason Darren Drew, Jedrzej Nowakowski, Mark Newsam, Neil Mallory, Robert Charles Beat, Ruiyan Zhao
Abstract: Method, apparatuses, and systems are described to display image data to a sub-pixel within a micro-LED (mLED) display. A sub-pixel image data value is stored at the sub-pixel. The sub-pixel is turned to an ON state. A shared row counter value is provided to the sub-pixel. The shared row counter value and the sub-pixel image data value are compared at the sub-pixel. The sub-pixel is turned to an OFF state if the shared row counter value is equal to or greater than the sub-pixel image data value.
Type:
Grant
Filed:
April 3, 2024
Date of Patent:
December 30, 2025
Assignee:
FORTH DIMENSION DISPLAY, LTD
Inventors:
Christopher Robert Chalmers, Mladen Panovic, Debra Jane Lefley, Gordon John Faulds, Jason Darren Drew, Jedrzej Nowakowski, Mark Newsam, Neil Mallory, Robert Charles Beat, Robert Arthur Creber, Ruiyan Zhao
Abstract: Methods, apparatuses, and systems are described to display image data to a sub-pixel within a micro-LED (mLED) display. A row-based illumination period counter is used to operate sub-pixels within a row of the mLED display. An ON-state signal line and an illumination period signal line are coupled to the sub-pixels in the row. A first counter is incremented by an input clock signal and generates a first output. A second counter receives the first output and the second counter outputs, on the illumination period signal line, a second output that corresponds to an ON time for a sub-pixel. A sub-pixel mLED turns from the ON state to an OFF state when a stored sub-pixel data value is equal to or greater than the second output.
Type:
Grant
Filed:
April 4, 2024
Date of Patent:
December 30, 2025
Assignee:
FORTH DIMENSION DISPLAY, LTD
Inventors:
Christopher Robert Chalmers, Gordon John Faulds, Jason Darren Drew, Mark Newsam, Robert Charles Beat
Abstract: Method, apparatuses, and systems are described to display image data to a sub-pixel within a micro-LED (mLED) display. A sub-pixel image data value is stored at the sub-pixel. The sub-pixel is turned to an ON state. A shared row counter value is provided to the sub-pixel. The shared row counter value and the sub-pixel image data value are compared at the sub-pixel. The sub-pixel is turned to an OFF state if the shared row counter value is equal to or greater than the sub-pixel image data value.