Organic light-emitting display device
AssigneesLG Display Co., Ltd., University-Industry Cooperation Group of Kyung Hee University
InventorsSunKap Kwon, JangHyuk Kwon, MiJin Park, SeongKeun Kim
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Abstract
An organic light-emitting display (OLED) device includes an anode, an organic emitting layer on the anode, and a cathode on the organic emitting layer. The cathode is configured to transmit at least a part of light emitted from the organic emitting layer and is formed of an alloy having a first metal and an oxide of a second metal. The cathode contains an alloy of a metal and a metal oxide and has an increased thickness, such that the process margin for the cathode can be improved.
Claims17
An organic light-emitting display device comprising:
- an anode;
- an organic emitting layer on the anode;
- and
- a cathode, on the organic emitting layer, to transmit at least a part of light emitted from the organic emitting layer,
- wherein the cathode has a single layer of an alloy having a first metal and an oxide of a second metal to have the cathode have a thickness equal to or greater than 250 Å to about 400 Å,
- wherein the cathode has a specific light transmissive characteristics that achieve a top emission type display configuration using the alloy of the first metal and the oxide of the second metal that exhibits improved thickness characteristics while achieving comparable characteristics for light emission efficiency, color coordinates, viewing angle and lifespan when compared to a cathode made of AgMg alloy, and
- wherein the cathode having the improved thickness characteristics results in a better cathode deposition uniformity and an improved margin of error during manufacturing to result in a higher manufacturing yield.
An organic light-emitting display device comprising:
- an anode;
- an organic emitting layer on the anode;
- a cathode on the organic emitting layer, and having a single layer of an alloy having a first metal and an oxide of a second metal;
- and
- a capping layer on the cathode,
- wherein a thickness of the cathode is equal to or greater than 250 Å to about 400 Å,
- wherein a difference (dN) between a refractive index of the cathode and a refractive index of the capping layer is within a range of 0<dN<1.6,
- wherein the cathode has a specific light transmissive characteristics that achieve a top emission type display configuration using the alloy of the first metal and the oxide of the second metal that exhibits improved thickness characteristics while achieving comparable characteristics for light emission efficiency, color coordinates, viewing angle and lifespan when compared to a cathode made of AgMg alloy, and
- wherein the cathode having the improved thickness characteristics results in a better cathode deposition uniformity and an improved margin of error during manufacturing to result in a higher manufacturing yield.
An organic light-emitting display device comprising:
- a plurality of pixels in a display area of a substrate,
- each of the plurality of pixels having an organic light emitting layer between a cathode and an anode, and
- the cathode having specific light transmissive characteristics that achieve a top emission type display configuration and having a single layer of an oxide metal alloy that exhibits improved thickness characteristics while achieving comparable characteristics for light emission efficiency, color coordinates, viewing angle and lifespan when compared to a cathode made of AgMg alloy,
- wherein a thickness of the oxide metal alloy cathode is at least 250 Å, and
- wherein the oxide metal alloy cathode having the improved thickness characteristics results in a better cathode deposition uniformity and an improved margin of error during manufacturing to result in a higher manufacturing yield.
Dependencies are inferred from the claim text.