Organic electroluminescence device and fabrication method thereof
View Patent ↗An organic electroluminescence device includes a buffer formed in a polygonal structure corresponding to each of sub-pixels, an electrode separator formed along an outer periphery of the buffer so as to separate the sub-pixels, an emission region formed in an inner region defined by the buffer, and an electric connection region formed in a region protruding from one side of the buffer.
1. An organic electroluminescence device, comprising:
a pixel including a plurality of sub-pixels;
a buffer formed in a polygonal structure corresponding to each of the plurality of sub-pixels;
an electrode separator formed along an outer periphery of the buffer to separate the plurality of sub-pixels;
an emission region surrounded by the buffer; and
an electric connection region formed in an area protruding from one side of the buffer having the polygonal structure.
2. The organic electroluminescence device according to claim 1 , wherein the emission region includes edges that are rounded.
3. The organic electroluminescence device according to claim 1 , further comprising:
an organic electroluminescent layer formed in the emission region; and
first and second electrodes formed sandwiching the emission region that includes two surfaces in contact with the organic electroluminescent layer.
4. The organic electroluminescence device according to claim 3 , wherein the organic electroluminescent layer is formed of a high molecular organic luminescent material.
5. The organic electroluminescence device according to claim 3 , wherein the electric connection region is connected to at least one of the first and second electrodes so as to provide a predetermined voltage to the organic electroluminescent layer formed in the emission region.
6. The organic electroluminescence device according to claim 5 , wherein the electric connection region is one of a conductive spacer contact region and a contact hole.
7. The organic electroluminescence device according to claim 6 , wherein the electric connection region is the conductive spacer contact region, and the organic electroluminescence device is a dual panel type organic electroluminescence device including an array element, an organic electroluminescent diode, and a conductive spacer arranged between the array electrode and organic electroluminescent diode that are formed on different substrates.
8. The organic electroluminescence device according to claim 7 ,
wherein the different substrates include first and second substrates that are spaced apart from each other by a predetermined distance, the first and second substrates having sub-pixels on which an image is formed;
wherein the array element includes at least one drive TFT (thin film transistor) formed on an inner surface of the first substrate by sub-pixel unit, and the conductive spacer electrically connected to the drive TFT of the array element;
wherein the first electrode is disposed on an inner surface of the second substrate, and the organic electroluminescent layer and a second electrode sequentially formed on the first electrode by sub-pixel unit; and
wherein the first and second substrates are misaligned by a predetermined position and bonded with each other such that the conductive spacer is in contact with the conductive spacer contact region that is formed on the second electrode.
9. The organic electroluminescence device according to claim 6 , wherein the electric connection region is the contact hole, and the organic electroluminescence device is a single panel type organic electroluminescence device including an array element and an organic electroluminescent diode that are formed on a single substrate.
10. The organic electroluminescence device according to claim 9 ,
wherein the array element includes a TFT formed within a partition region defined by gate and data lines on the single substrate, and the single substrate includes a passivation layer and the first electrode sequentially formed thereon;
wherein the contact hole is formed on predetermined portions of the passivation layer and the first electrode to expose a drain electrode of the TFT, and the buffer and the electrode separator are formed in a region including the emission region and the contact hole in a sub-pixel structure and are misaligned with the gate lines and the data lines of the partition region by a predetermined position; and
wherein the second electrode formed on the organic electroluminescent layer and connected to the drain electrode of the TFT through the contact hole.
11. The organic electroluminescence device according to claim 10 , wherein the emission region includes the second electrode connected to the drain electrode of the TFT, the organic electroluminescent layer disposed below the second electrode, and the first electrode contacting with the organic electroluminescent layer.
12. The organic electroluminescence device according to claim 10 , wherein the partition region and a corresponding sub-pixel region are misaligned by a predetermined position.