Active matrix type organic electroluminescent display and method of manufacturing the same
AssigneeSamsung Electronics Co., Ltd.
InventorsBeom-Rak Choi, Joon-Hoo Choi
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Abstract
Disclosed is an active matrix type organic electroluminescent display and method of manufacturing the same. A black matrix is formed on substantially an entire surface of a substrate except for a portion on which a pixel electrode region is formed. The substrate includes metal interconnections for driving thin film transistors, a pixel electrode connected with the thin film transistors and an organic electroluminescent layer formed on the pixel electrode. By the above structure, reflection of an external light from a non-luminescent region except for the pixel electrode is minimized to thereby obtain a high contrast ratio.
Claims24
An active matrix type organic electroluminescent display comprising:
- a substrate including a thin film transistor, metal interconnections for driving the thin film transistor, a pixel electrode connected with the thin film transistor, and an organic electroluminescent layer formed on the pixel electrode;
- and
- a black matrix formed on substantially an entire surface of the substrate except for a portion on which the pixel electrode region is formed.
An active matrix type organic electroluminescent display comprising:
- a substrate;
- a black matrix formed on substantially an entire surface of the substrate;
- a thin film transistor formed on the black matrix and having an active pattern, a gate electrode, and source/drain electrodes;
- a passivation layer formed on the thin film transistor, the black matrix, and the substrate;
- a pixel electrode formed on the passivation layer, the pixel electrode being connected with the thin film transistor;
- and
- an organic electroluminescent layer formed on the pixel electrode.
A method of manufacturing an active matrix type organic electroluminescent display, the method comprising the steps of:
- forming a black matrix on substantially an entire surface of a substrate;
- forming a thin film transistor on the black matrix and the substrate, the thin film transistor including an active pattern, a gate electrode, and source/drain electrodes;
- forming a passivation layer on the thin film transistor, the black matrix, and the substrate;
- forming a pixel electrode on the passivation layer to connect with the thin film transistor;
- and
- forming an organic electroluminescent layer on the pixel electrode.
An active matrix type organic electroluminescent display comprising:
- a substrate including a thin film transistor, metal interconnections for driving the thin film transistor, a pixel electrode connected with the thin film transistor, and an organic electroluminescent layer formed on the pixel electrode;
- and
- a low reflective pattern formed on a surface of the substrate except for a portion on which the pixel electrode region is formed.
20 An active matrix type organic electroluminescent display comprising:
- a substrate;
- a low reflective pattern formed on substantially a surface of the substrate except for a pixel electrode region;
- a thin film transistor formed on the low reflective pattern and having an active pattern, a gate electrode, and source/drain electrodes;
- a passivation layer formed on the thin film transistor, the low reflective pattern, and the substrate;
- a pixel electrode formed on the passivation layer, the pixel electrode being connected with the thin film transistor;
- and
- an organic electroluminescent layer formed on the pixel electrode.
The active matrix type organic electroluminescent display as claimed in claim 20, wherein the low reflective pattern comprises a material having a low reflectivity of less than about 5%.
A method of manufacturing an active matrix type organic electroluminescent display, the method comprising:
- forming a low reflective pattern on substantially a surface of a substrate except for a pixel electrode region;
- forming a thin film transistor on the low reflective pattern and the substrate, the thin film transistor including an active pattern, a gate electrode, and source/drain electrodes;
- forming a passivation layer on the thin film transistor, the low reflective pattern, and the substrate;
- forming a pixel electrode on the passivation layer to connect with the thin film transistor;
- and
- forming an organic electroluminescent layer on the pixel electrode.
Dependencies are inferred from the claim text.