US 11,887,546 B2 · Electronic display with hybrid in-pixel and external compensation

Abstract

A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.

Claims19

Dependent claims

A method of operating a display pixel having a light-emitting diode, a drive transistor, at least one emission transistor, and an anode reset transistor coupled to an anode of the light-emitting diode, the method comprising:

during a refresh period, deactivating the at least one emission transistor and setting an anode reset voltage for the anode reset transistor to a first voltage level;
during an emission period after the refresh period, activating the at least one emission transistor;
and
during a blanking period after the emission period, deactivating the at least one emission transistor and pulsing the anode reset voltage at least once to a second voltage level different than the first voltage level. period.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

18/192,905Filed 30 Mar 2023 · continuation

Priority

11 Jan 2019

Published

US 2023/0237965 A127 Jul 2023

Granted

30 Jan 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 3/3258
Using an active matrix: with pixel circuitry controlling the voltage across the light-emitting element
H10D 30/6755
Characterised by the active materials: oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate
H10K 59/1213
Characterised by the geometry or disposition of pixel elements: the pixel elements being TFTs

Family

Application62/791,522Us provisional application · filed 11 Jan 2019

Application16/716,911Parent of this continuation · filed 17 Dec 2019

Application17/062,786Parent of this continuation · filed 5 Oct 2020

US 10,916,198 B2Parent of this continuation · filed 9 Feb 2021

Application17/680,059Parent of this continuation · filed 24 Feb 2022

US 11,282,462 B2Parent of this continuation · filed 22 Mar 2022

US 2023/0237965 A1Pre-grant publication · published 27 Jul 2023

US 11,651,736 B2Parent of this continuation

US 10,847,095 B2Related patent

US 10,885,850 B2Related patent

US 2020/0226978 A1Published application

US 2021/0020109 A1Published application

US 2022/0180812 A1Published application

US 11,887,546 B2This patent

From the US filing history. Foreign family members aren’t listed.

Electronic display with hybrid in-pixel and external compensation

Life of this patent

Electronic display with hybrid in-pixel and external compensation

Life of this patent

Abstract

Claims19