The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2020
Filed:
Dec. 10, 2018
Sharp Kabushiki Kaisha, Osaka, JP;
Michael James Brownlow, Oxford, GB;
Tong Lu, Oxford, GB;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A display system includes a pixel circuit and an analogue external compensation system that is operable with the pixel circuit to compensate for differences in a property of the drive transistor and/or light-emitting device. The display system includes a pixel circuit having a drive transistor configured to control an amount of current to a light-emitting, and an analogue external compensation system that is operable with the pixel circuit. The analogue external compensation system includes a current regulator that regulates a current applied to a first terminal of the pixel circuit to approximate a current supplied through the drive transistor to the light-emitting device; a current mirror that receives the current from the regulator and mirrors said current from the regulator to output a mirrored current; a current source that supplies a programming reference current; and an integrator that receives inputs of the mirrored current and the programming reference current. The integrator converts a difference between the mirrored current and the programming reference current to an adjusted data voltage that is applied to a second terminal of the pixel circuit to compensate for a variation in a property of the drive transistor and/or the light-emitting device.