Panel and drive control method
AssigneeSony Corporation
InventorsTetsuro Yamamoto, Katsuhide Uchino
Life of this patent
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Abstract
A common power line shared by all the pixels allows threshold correction to be performed simultaneously on all the pixels. Video signal lines are set to a second reference potential higher than a reference potential, followed by multi-step threshold correction and video signal writing which are performed in a line sequential manner. Performing the threshold correction immediately before the video signal writing ensures shorter time from the threshold correction to the video signal writing. This suppresses leak currents, providing improved image quality.
Claims12
A panel comprising
- a plurality of pixel circuits arranged in a matrix form, respective ones of the pixel circuits including:
- a light-emitting element configured to emit light according to a drive current;
- a sampling transistor configured to sample a video signal;
- a drive transistor configured to supply the drive current to the light-emitting element;
- and
- a holding capacitor configured to hold a given potential, and
- power supply means for controlling a source voltage, supplied to the pixel circuits, simultaneously for the pixel circuits in two or more rows, wherein
- a threshold correction preparation and a first threshold correction are performed simultaneously on all the pixel circuits in two or more rows in units of which the pixel circuits are supplied the source voltage by the power supply means, and
- a second threshold correction is performed on the pixel circuits one row at a time once or more times in a line sequential manner.
A drive control method of a panel, the panel including
- a plurality of pixel circuits arranged in a matrix form, respective ones of the pixel circuits including:
- a light-emitting element configured to emit light according to a drive current;
- a sampling transistor configured to sample a video signal;
- a drive transistor configured to supply the drive current to the light-emitting element;
- and
- a holding capacitor configured to hold a given potential, the panel further including
- power supply means for controlling a source voltage, supplied to the pixel circuits, simultaneously for the pixel circuits in two or more rows, the drive control method comprising the steps of
- performing a threshold correction preparation and a first threshold correction simultaneously on all the pixel circuits in two or more rows, and
- then performing a second threshold correction on the pixel circuits one row at a time once or more times in a line sequential manner.
Dependencies are inferred from the claim text.