Method and apparatus for providing a high-performance active matrix pixel using organic thin-film transistors
AssigneeSarnoff Corporation
InventorsMichael G. Kane, Barry K. Greening, Frank Paul Cuomo
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Abstract
A pixel structure having at least one organic thin film transistor (OTFT) that minimizes gate-to-pixel capacitance. In one embodiment, a pixel structure provides a new transistor structure where an OTFT electrode on the data-line side of the transistor is extended or wrapped around three sides of the transistor relative to a pixel-side electrode. Thus, the pixel-side electrode can be made very small without reducing the effective width (and therefore on-current) of the transistor.
Claims24
A display comprising a plurality of pixels with each pixel having at least one organic thin film transistor (OTFT), said OTFT comprising:
- a first source-drain electrode having a first end and a second end, wherein said second end has at least one trough;
- a second source-drain electrode having a first end and a second end, wherein said first end of said second source-drain electrode is disposed within said second end of said first source-drain electrode;
- an organic layer coupled to said first and second source-drain electrodes;
- a gate dielectric layer coupled to said organic layer;
- a gate electrode coupled to said gate dielectric layer;
- and
- a substrate coupled to said gate electrode.
A display comprising a plurality of pixels, each pixel comprising:
- a pixel electrode;
- and
- at least one organic thin film transistor (OTFT), said OTFT comprising:
- a first source-drain electrode having a first end and a second end, wherein said second end has at least one trough;
- a second source-drain electrode having a first end and a second end, wherein said first end of said second source-drain electrode is disposed within said second end of said first source-drain electrode and wherein said second end of said second source-drain electrode is coupled to said pixel electrode;
- an organic layer coupled to said first and second source-drain electrodes;
- a gate dielectric layer coupled to said organic layer;
- a gate electrode coupled to said gate dielectric layer;
- and
- a substrate coupled to said gate electrode.
A system comprising:
- a display controller and
- a display, coupled to said display controller, where said display comprises a plurality of pixels, where each pixel comprises:
- a pixel electrode;
- and
- at least one organic thin film transistor (OTFT), said OTFT comprising:
- a first source-drain electrode having a first end and a second end, wherein said second end has at least one trough;
- a second source-drain electrode having a first end and a second end, wherein said first end of said second source-drain electrode is disposed within said second end of said first source-drain electrode and wherein said second end of said second source-drain electrode is coupled to said pixel electrode;
- an organic layer coupled to said first and second source-drain electrodes;
- a gate dielectric layer coupled to said organic layer;
- a gate electrode coupled to said gate dielectric layer;
- and
- a substrate coupled to said gate electrode.
Dependencies are inferred from the claim text.