Method for driving display element and method for driving display device
AssigneeSony Corporation
InventorsHideki Sugimoto, Katsuhide Uchino
Life of this patent
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Abstract
Disclosed herein is a method for driving a display element including a current-driven light emitting part and a drive circuit, the drive circuit including a write transistor, a drive transistor, and a capacitive part, the method including the steps of: executing threshold voltage cancel processing of changing potential of the second node toward potential obtained by subtracting threshold voltage of the drive transistor from potential of the first node in a state in which the potential of the first node is kept; and executing write processing of applying a video signal from the data line to the first node via the write transistor turned to an on-state by a scan signal from the scan line.
Claims5
A display device including:
- a current-driven light emitting part;
- a drive circuit, the drive circuit including a write transistor, a drive transistor, and a capacitive part, in a display element;
- and
- an additional capacitive element between the first electrode of the light emitting part and the capacitive part,
- wherein,
- the drive circuit is configured to (a) execute correction processing of extracting a current flow through the drive transistor to the capacitive part, and (b) execute write processing of writing a video signal from the data line to the capacitive part via the write transistor,
- the correction processing is executed in a state in which a first reference voltage is applied to a first electrode of the light emitting part,
- subsequently the write processing is executed in a state in which a second reference voltage lower than the first reference voltage is applied to the first electrode of the light emitting part,
- the light emitting part and the drive transistor are connected between a first power supply line and a second power supply line so as to form a current path when the light emitting part emits light, wherein:
- Vcat-H denotes the first reference voltage,
- VCat-L denotes the second reference voltage,
- VSig-Max denotes a maximum value that is possibly taken by the video signal,
- VSig-min denotes a minimum value that is possibly taken by the video signal,
- cA denotes capacitance of the capacitive part,
- cB denotes capacitance of the additional capacitive element,
- VOfs denotes voltage applied to the capacitive part during the correction processing, and
- a relationship Vcat-H−VCat-L=((VSig-Max+VSig-min)/2 −VOfs)·cA/cB holds true.
Dependencies are inferred from the claim text.