Electroluminescent element including a thin-film transistor for charge control
First Claim
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1. An electroluminescent element comprising:
- a first electrode;
a second electrode;
a luminescent layer located between said first electrode and said second electrode and emitting light by application of an AC voltage to said first electrode and said second electrode;
a first dielectric layer located between said first electrode and said luminescent layer;
a second dielectric layer located between said second electrode and said luminescent layer;
a charge control layer located between said luminescent layer and at least one of said first and second dielectric layers, and controlling the stored charge in accordance with a control voltage; and
a charge control means connected to said charge control layer for controlling charge stored in said charge control layer, said charge control means comprising;
a switching element having an input terminal, an output terminal and a control terminal, and said charge control layer is connected to said output terminal of said switching element.
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Abstract
An electroluminescent element comprising a first electrode, a second electrode, a luminescent layer located between the first electrode and the second electrode and emitting light by application of the AC voltage to the first electrode and the second electrode, a first dielectric layer located between the first electrode and the luminescent layer, a second dielectric layer located between the second electrode and the luminescent layer, and a charge control layer located between the luminescent layer and at least one of the first and second dielectric layers and controlling stored charge accordance with control voltage.
66 Citations
10 Claims
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1. An electroluminescent element comprising:
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a first electrode; a second electrode; a luminescent layer located between said first electrode and said second electrode and emitting light by application of an AC voltage to said first electrode and said second electrode; a first dielectric layer located between said first electrode and said luminescent layer; a second dielectric layer located between said second electrode and said luminescent layer; a charge control layer located between said luminescent layer and at least one of said first and second dielectric layers, and controlling the stored charge in accordance with a control voltage; and a charge control means connected to said charge control layer for controlling charge stored in said charge control layer, said charge control means comprising; a switching element having an input terminal, an output terminal and a control terminal, and said charge control layer is connected to said output terminal of said switching element. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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2. An electroluminescent element comprising:
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a first electrode; a second electrode; a luminescent layer located between said first electrode and said second electrode and emitting light by application of an AC voltage to said first electrode and said second electrode; a first dielectric layer located between said first electrode and said luminescent layer; a second dielectric layer located between said second electrode and said luminescent layer; a charge control layer located between said luminescent layer and at least one of said first and second dielectric layers, and controlling the stored charge in accordance with a control voltage; and an insulating layer interposed between said charge control layer and said luminescent layer.
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9. An electroluminescent element comprising:
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a first electrode; a second electrode; a luminescent layer located between said first electrode and said second electrode and emitting light by application of an AC voltage to said first electrode and said second electrode; a first dielectric layer located between said first electrode and said luminescent layer; a second dielectric layer located between said second electrode and said luminescent layer; and a charge control layer located between said luminescent layer and at least one of said first and second dielectric layers, and controlling the stored charge in accordance with a control voltage, and wherein said charge layer control layer comprises a semiconductor material.
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10. An electroluminescent element comprising:
an insulating substrate having thereon a lower electrode, a first dielectric layer, a luminescent layer, a second dielectric layer, an upper electrode, a semiconductor layer interposed either (a) between said first dielectric layer and said luminescent layer or (b) between said luminescent layer and said second dielectric layer or (c) both between said first dielectric layer and said luminescent layer and said luminescent layer and said second dielectric layer and a thin-film transistor, wherein said semiconductor layer has a portion extending beyond said luminescent layer which functions as a channel of a thin-film transistor.
Specification