System and methods for providing a driving circuit for active matrix type displays
AssigneeSeiko Epson Corporation
InventorToshiyuki Kasai
Life of this patent
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Abstract
The present invention provides an organic electroluminescence element driving circuit that is capable of realizing application of reverse bias without increasing power consumption and cost. The connected relationship between a power supply potential Vcc and the GRD is changed by manipulating switches. With this arrangement, application of reverse bias to an organic electroluminescence element can be realized without newly preparing additional power supplies such as a negative power supply, and the like, whereby the life of an organic electroluminescence element can be increased.
Claims18
A driving circuit that drives an active matrix type display in which a plurality of pixels including an electro-optical element are disposed in a matrix, comprising:
- a first terminal electrically connected to one of a first power supply line that supplies a first potential and a second power supply line that supplies a second potential lower than the first potential;
- and
- a second terminal electrically connected to one of the first and the second power supply lines through the electro-optical element,
- the first terminal and the second terminal being electrically connected to the first power supply line and second power supply line, respectively, through the electro-optical element when the electro-optical element is in a first operating state, and
- the first terminal and the second terminal being electrically connected to the second power supply line and the first power supply line, respectively, through the electro-optical element when the electro-optical element is in a second operating state.
A method of driving an active matrix type display including a first power supply line having a first potential, a second power supply line having a second potential that is a potential lower than the first potential, and electro-optical element electrically disposed between the first power supply line and the second power supply line, the method comprising the steps of:
- electrically connecting a first end of the electro-optical element to the second power supply line when a second end of the electro-optical element is electrically connected to the first power supply line when the electro-optical element is in a first operating state;
- and
- electrically connecting the first end of the electro-optical element to the first power supply line when the second end of the electro-optical element is electrically connected to the second power supply line when the electro-optical element is in a second operating state.
An active matrix type display including a first power supply line having a first potential, a second power supply line having a second potential that is a potential lower than the first potential, and an electro-optical element electrically coupled between the first power supply line and the second power supply line,
- a first end of the electro-optical element being electrically connected to the second power supply line when a second end of the electro-optical element is electrically connected to the first power supply line when the electro-optical element is in a first operating state, and
- the first end of the electro-optical element being electrically connected to the first power supply line when the second end of the electro-optical element is electrically connected to the second power supply line when the electro-optical element is in a second operating state.
Dependencies are inferred from the claim text.