Organic electroluminescent display device with improved interface between anode and luminescent organic layer
First Claim
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1. An organic electroluminescent display device (OELD), comprising:
- a lower electrode arranged on a substrate;
an insulating layer arranged on the substrate, the insulating layer having an aperture adapted to expose a portion of the lower electrode, the insulating layer also having a plurality of recesses arranged in a top surface of said insulating layer;
an organic layer arranged on the exposed portion of the lower electrode exposed by the aperture, the organic layer including an organic luminescent layer adapted to emit light; and
an upper electrode arranged on the organic layer,wherein more than two of said plurality of recesses is located on an opposite side of said aperture from more than two of said plurality of recesses,wherein said top surface of said insulating layer is a side furthest from said substrates,wherein said plurality of recesses have a same shape and are in a same planar level.
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Abstract
An organic electroluminescent display device (OELD) that prevents particles from creating blind spots by forming a recess or a groove in the surface of an insulating layer that covers edges of a pixel electrode. The OELD includes a lower electrode arranged on a substrate, an insulating layer arranged on the substrate, the insulating layer having an aperture adapted to expose a portion of the lower electrode, an organic layer arranged on the exposed portion of the lower electrode, and an upper electrode arranged on the substrate, wherein the insulating layer includes a recess and/or a groove in its surface.
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Citations
17 Claims
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1. An organic electroluminescent display device (OELD), comprising:
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a lower electrode arranged on a substrate; an insulating layer arranged on the substrate, the insulating layer having an aperture adapted to expose a portion of the lower electrode, the insulating layer also having a plurality of recesses arranged in a top surface of said insulating layer; an organic layer arranged on the exposed portion of the lower electrode exposed by the aperture, the organic layer including an organic luminescent layer adapted to emit light; and an upper electrode arranged on the organic layer, wherein more than two of said plurality of recesses is located on an opposite side of said aperture from more than two of said plurality of recesses, wherein said top surface of said insulating layer is a side furthest from said substrates, wherein said plurality of recesses have a same shape and are in a same planar level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An organic electroluminescent display device (OELD), comprising:
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a lower electrode arranged on a substrate; an insulating layer arranged on the substrate, the insulating layer having an aperture adapted to expose a portion of the lower electrode, the insulating layer also having a plurality of grooves arranged in a top surface of said insulating layer; an organic layer arranged on the exposed portion of the lower electrode; and an upper electrode arranged on the organic layer, wherein said plurality of grooves is formed in an entire surface of the insulating layer except at edges of the aperture, wherein more than two of said plurality of grooves is located on an opposite side of said aperture from more than two of said plurality of grooves, wherein said top surface of said insulating layer is a side furthest from said a substrates, wherein said plurality of grooves have a same shape and are in a same planar level. - View Dependent Claims (10, 11)
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12. An organic electroluminescent display device (OELD), comprising:
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a thin film transistor arranged on a substrate, the thin film transistor including at least a source electrode and a drain electrode; a first insulating layer arranged on the substrate, the first insulating layer having an aperture adapted to expose one of the source electrode and drain electrode of the thin film transistor; a pixel electrode arranged on the first insulating layer and connected to one of the source electrode and drain electrode via the aperture in the first insulating layer; a second insulting layer arranged on the first insulating layer and including an aperture adapted to expose a portion of the pixel electrode, wherein the second insulating layer further includes a plurality of recesses arranged in a top surface of said second insulating layer; an organic layer arranged on the exposed portion of the pixel electrode; and an upper electrode arranged on the organic layer, wherein more than two of said plurality of recesses is located on an opposite side of said aperture from more than two of said plurality of recesses, wherein said top surface of said second insulating layer is a side furthest from said a substrates, wherein said plurality of recesses have a same shape and are in a same planar level. - View Dependent Claims (13, 14, 15)
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16. An organic electroluminescent display device (OELD), comprising:
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a thin film transistor arranged on a substrate, the thin film transistor including at least a source electrode and a drain electrode; a first insulating layer arranged on the substrate, the first insulating layer having an aperture adapted to expose one of the source electrode and drain electrode of the thin film transistor; a pixel electrode arranged on the first insulating layer and connected to one of the source electrode and drain electrode via the aperture in the first insulating layer; a second insulting layer arranged on the first insulating layer and having an aperture adapted to expose a portion of the pixel electrode, wherein the second insulating layer further includes a plurality of grooves arranged in a top surface thereof of said second insulating layer; an organic layer arranged on the exposed portion of the pixel electrode; and an upper electrode arranged on the organic layer, wherein more than two of said plurality of grooves is located on an opposite side of said aperture from more than two of said plurality of grooves, wherein said top surface of said second insulating layer is a side furthest from said a substrates, wherein said plurality of grooves have a same shape and are in a same planar level. - View Dependent Claims (17)
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Specification