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US 12,707,772 B2Granted
Display device and manufacturing method thereof
AssigneeLG Display Co., Ltd.
InventorsYong Seok Kwak, Min Jae Kang
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Abstract
A display device according to an embodiment of the present invention comprises a color conversion substrate and a color conversion layer which convert light of a first color emitted by an LED to a second color and emit the light in all directions.
Claims19
A display device comprising:
- a thin-film transistor on a substrate, the thin-film transistor including an active layer, a gate electrode, a source electrode, and a drain electrode;
- a light emitting diode (LED) on the thin-film transistor, the LED including a P-type electrode, an N-type electrode, and a light emitting layer, and the LED electrically connected to the thin-film transistor;
- a first color conversion layer surrounding an upper surface and a first lateral surface of the LED and a second lateral surface of the LED opposite the first lateral surface of the LED, the first color conversion layer configured to convert light of a first color emitted from the LED into light of a second color;
- and
- a color conversion substrate including a second color conversion layer at a position corresponding to the first color conversion layer.
2 more elements
A manufacturing method of a display device, comprising:
- forming a thin-film transistor including an active layer, a gate electrode, a source electrode, and a drain electrode on a substrate;
- transferring a light emitting diode (LED) including a P-type electrode, an N-type electrode, and a light emitting layer onto the thin-film transistor;
- covering an upper surface, a first lateral surface, and a second lateral surface of the LED with a first color conversion layer, the second lateral surface of the LED being opposite the first lateral surface of the LED;
- forming a planarization layer on a lateral surface of the first color conversion layer;
- connecting the source electrode or the drain electrode of the thin-film transistor and the P-type electrode of the LED by a connection wire;
- forming a first black matrix on the connection wire;
- and
- attaching a color conversion substrate onto the first black matrix and the first color conversion layer.
5 more elements
A manufacturing method of a display device, comprising:
- forming a thin-film transistor including an active layer, a gate electrode, a source electrode, and a drain electrode on a substrate;
- transferring a light emitting diode (LED) including a P-type electrode, an N-type electrode, and a light emitting layer onto the thin-film transistor;
- covering the LED with a first color conversion layer;
- forming a planarization layer on a lateral surface of the first color conversion layer;
- connecting the source electrode or the drain electrode of the thin-film transistor and the P-type electrode of the LED by a connection wire;
- forming a first black matrix on the connection wire;
- manufacturing a color conversion substrate;
- and
- attaching a color conversion substrate onto the first black matrix and the first color conversion layer,
- wherein manufacturing of the color conversion substrate comprises:
- laminating a black matrix film on a transparent film,
- forming a second black matrix by patterning the laminated black matrix film,
- forming a second color conversion layer by printing ink including a nano fluorescent body in a space between parts of the patterned second black matrix, and
- laminating an adhesive layer on the second black matrix and the second color conversion layer.
11 more elements
Dependencies are inferred from the claim text.