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US 2017/0250238 A1Published application
Display Containing Improved Pixel Architectures
AssigneesE.T.C. S.R.L., Flexterra, Inc.
InventorsMichele Muccini, Gianluca GENERALI, Riccardo D'Alpaos, Antonio Facchetti, Chung-Chin Hsiao, Hugh Lien
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Abstract
The invention relates to improved Organic Light Emitting Transistor (OLET) pixel architecture for OLET based displays.
Claims20
A display containing an array of pixels, wherein each pixel comprises at least a first driving transistor (100) and at least a second light emitting transistor (200) mounted on a common substrate (11), wherein the first driving transistor comprises the following elements:
- a first source electrode and a first drain electrode (12, 12′) physically separated but electrically connected to each other by a semiconductor layer (13),
- a first dielectric layer (14), and
- at least one first gate electrode (15), and
- the second light emitting transistor comprises the following elements:
- a second gate electrode (17),
- a second dielectric layer (18),
- a light emitting channel layer (19), and
- a second source electrode having a length Ls and a second drain electrode (20, 20′) having a length Ld,
- wherein the second gate electrode (17) is in electrical contact with the first source electrode and/or the first drain electrode (12, 12′), and
- characterized in that at least one of the second source electrode and the second drain electrode (20, 20′) vertically overlaps with the second gate (17) by at least 5 μm, such vertical overlaps being represented by L and L′, respectively, and that said second source electrode and second drain electrode are horizontally separated by at least 2 μm.
7 more elements
Dependencies are inferred from the claim text.