Inversion balancing compensation

US9984608B2 · kind B2 · utility

Assignee

• Apple Inc. · US

Inventors

• Paolo Sacchetto · Cupertino, US
• Christopher P. Tann · San Jose, US
• Taesung Kim · Seoul, KR
• Sandro H. Pintz · Menlo Park, US
• Marc Albrecht · Hamburg, DE
• Chaohao Wang · Sunnyvale, US
• David S. Zalatimo · Menlo Park, US
• Fenghua Zheng · San Jose, US
• Zhibing Ge · Los Altos, US

Key dates

• Filing date: Dec 31, 2015
• Grant date: May 29, 2018
• Expiry date: Feb 27, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G09G2340/0435
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

System and method for improving displayed image quality of an electronic display that displays a first image frame by applying a first voltage to a display pixel and a second image frame directly before the first image frame by applying a second voltage to the display pixel. A display pipeline is communicatively coupled to the electronic display and receives first image data corresponding with the first image frame, where the image data includes a first grayscale value corresponding with the display pixel. Additionally the display pipeline determines an inversion balancing grayscale offset based at least in part on the first grayscale value when polarity of the first voltage and polarity of the second voltage are the same and determines magnitude of the first voltage by applying the inversion balancing grayscale offset to the first grayscale value to reduce likelihood of a perceivable luminance spike when displaying the first image frame.