# US 2017/0287985 A1 · Organic light emitting display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0287985 A1 - Document ID: US20170287985A1 - Status: Published application - Kind: A1 - Application number: 15/469,779 - Filed: 2017-03-27 - Published: 2017-10-05 - Earliest claimed: 2016-03-29 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Taeshick KIM; Younseok KAM; Seung KIM; Jaeseung JANG; Mingyu LEE - Web page: https://patentgrep.com/patent/US20170287985A1 ## CPC - H10K 50/131: {with spacer layers between the electroluminescent layers} - H10K 50/13: comprising stacked EL layers within one EL unit - H10K 50/19: Tandem OLEDs - H10K 59/10: OLED displays - H10K 59/32: Stacked devices having two or more layers, each emitting at different wavelengths - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract An organic light emitting display device includes a first emission part between an anode and a cathode and a second emission part on the first emission part. At least one of the first emission part and the second emission part includes at least three emission layers emitting lights of different colors, and one of the at least three emission layers include a green emission layer including a phosphorescent material. Accordingly, a lifetime and color reproduction rate of the organic light emitting display device having green lifetime is enhanced. ## Claims ### Claim 1 An organic light emitting display device, comprising: a first emission part between an anode and a cathode; and a second emission part on the first emission part, wherein at least one of the first emission part and the second emission part includes at least three emission layers emitting lights of different colors, and one of the at least three emission layers include a green emission layer including a phosphorescent material. ### Claim 2 (depends on 1) The organic light emitting display device of claim 1, wherein the at least three emission layers comprise a red emission layer and a yellow-green emission layer. ### Claim 3 (depends on 2) The organic light emitting display device of claim 2, wherein the red emission layer is disposed adjacent to the yellow-green emission layer. ### Claim 4 (depends on 2) The organic light emitting display device of claim 2, wherein the red emission layer is disposed adjacent to the green emission layer. ### Claim 5 (depends on 1) The organic light emitting display device of claim 1, wherein a peak wavelength of light emitted from each of the first emission part and the second emission part is within a range of 456±10 nm, 530±10 nm, 560±10 nm, and 625±15 nm. ### Claim 6 (depends on 1) The organic light emitting display device of claim 1, further comprising: a third emission part on the second emission part. ### Claim 7 (depends on 6) The organic light emitting display device of claim 6, wherein light emitted from the first emission part, the second emission part, and the third emission part includes at least four peak wavelengths. ### Claim 8 (depends on 6) The organic light emitting display device of claim 6, wherein peak wavelengths of lights emitted from the first emission part, the second emission part, and the third emission part are within a range of 456±10 nm, 530±10 nm, 560±10 nm, and 625±15 nm. ### Claim 9 (depends on 6) The organic light emitting display device of claim 6, wherein at least two of the first emission part, the second emission part, and the third emission part include emission layers emitting light of a same color. ### Claim 10 (depends on 9) The organic light emitting display device of claim 9, wherein the at least two emission parts with the emission layers emitting light of the same color are disposed adjacent to each other. ### Claim 11 (depends on 9) The organic light emitting display device of claim 9, wherein a peak wavelength of the emission layers emitting light of the same color is within a range of 456±10 nm. ### Claim 12 (depends on 6) The organic light emitting display device of claim 6, further comprising: a charge generation layer in at least one of between the first emission part and the second emission part and between the second emission part and the third emission part. ### Claim 13 An organic light emitting display device, comprising: at least two emission parts between an anode and a cathode, wherein at least one of the at least two emission parts includes a first emission layer, a second emission layer including a phosphorescent material for emitting green light, and a third emission layer configured for enhancing a color reproduction rate and lifetime of the phosphorescent material. ### Claim 14 (depends on 13) The organic light emitting display device of claim 13, wherein the first emission layer comprises a red emission layer, and the third emission layer comprises a yellow-green emission layer. ### Claim 15 (depends on 13) The organic light emitting display device of claim 13, wherein the first emission layer is disposed adjacent to the second emission layer. ### Claim 16 (depends on 13) The organic light emitting display device of claim 13, wherein the first emission layer is disposed adjacent to the third emission layer. ### Claim 17 (depends on 13) The organic light emitting display device of claim 13, wherein a peak wavelength of light emitted from each of the at least two emission parts is within a range of 456±10 nm, 530±10 nm, 560±10 nm, and 625±15 nm. ### Claim 18 An organic light emitting display device, comprising: at least two emission parts between an anode and a cathode, wherein at least one of the at least two emission parts includes at least three emission layers, the at least three emission layers emitting light of different colors. ### Claim 19 (depends on 18) The organic light emitting display device of claim 18, wherein the at least three emission layers include a green emission layer, a red emission layer, and a yellow-green emission layer, and the at least three emission layers are arranged with energy band gaps increasing towards the cathode. ### Claim 20 (depends on 18) The organic light emitting display device of claim 18, wherein the at least three emission layers include a green emission layer, a red emission layer, and a yellow-green emission layer, and wherein the red emission layer is adjacent to the green emission layer or the yellow-green emission layer.