# US 2019/0173035 A1 · Organic light emitting display device and lighting apparatus for vehicles using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173035 A1 - Document ID: US20190173035A1 - Status: Published application - Kind: A1 - Application number: 16/255,777 - Filed: 2019-01-23 - Published: 2019-06-06 - Earliest claimed: 2015-09-09 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: EunJung Park - Web page: https://patentgrep.com/patent/US20190173035A1 ## CPC - H10K 59/32: Stacked devices having two or more layers, each emitting at different wavelengths - F21S 41/155: Surface emitters, e.g. organic light emitting diodes [OLED] - F21S 43/145: Surface emitters, e.g. organic light emitting diodes [OLED] - F21S 45/10: Protection of lighting devices (cooling of lighting devices F21S45/40; waterproofing of lighting devices F21S45/50) - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 50/16: Electron transporting layers - H10K 50/171: {Electron injection layers} - H10K 50/19: Tandem OLEDs - H10K 50/157: {between the light-emitting layer and the cathode} - H10K 2101/30: Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values - H10K 2101/40: Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers - H10K 2102/00: Constructional details relating to the organic devices covered by this subclass - H10K 2102/361: {Temperature} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS ## Abstract An organic light emitting display device and a light apparatus for vehicles using the same are provided. The organic light emitting display device includes a first layer on a first electrode, a second layer on the first layer, a second electrode on the second layer, and an N-type charge generation layer between the first layer and the second layer. The first layer includes a first emission layer and a first electron transport layer, and the second layer includes a second emission layer and a second electron transport layer. A low unoccupied molecular orbitals (LUMO) level of the first electron transport layer is higher than a LUMO level of a host included in the N-type charge generation layer. ## Claims ### Claim 1 An organic light emitting display device, comprising: a first emission layer on a first electrode; a first electron transport layer on the first emission layer; a charge generation layer on the first electron transport layer; a second emission layer on the charge generation layer; and a second electrode on the second emission layer, wherein a low unoccupied molecular orbitals (LUMO) level of the first electron transport layer is higher than a LUMO level of a host in the charge generation layer. ### Claim 2 (depends on 1) The organic light emitting display device of claim 1, wherein a difference between the LUMO level of the first electron transport layer and the LUMO level of the host in the charge generation layer is greater than 0.2 eV. ### Claim 3 (depends on 1) The organic light emitting display device of claim 1, wherein a difference between the LUMO level of the first electron transport layer and the LUMO level of the host in the charge generation layer is 0.4 eV or more. ### Claim 4 (depends on 1) The organic light emitting display device of claim 1, wherein a thickness of the first electron transport layer is 5 nm to 30 nm, and the first electron transport layer comprises one material or the first electron transport layer is formed by co-depositing at least two materials. ### Claim 5 (depends on 1) The organic light emitting display device of claim 1, wherein the host of the charge generation layer is doped with at least one material among lithium (Li), sodium (Na), potassium (K), cesium (Cs), magnesium (Mg), strontium (Sr), barium (Ba), radium (Ra), Liq, and an N-type dopant. ### Claim 6 (depends on 1) The organic light emitting display device of claim 1, wherein one among the first electrode and the second electrode comprises one among a transmissive electrode and a reflective electrode. ### Claim 7 (depends on 1) The organic light emitting display device of claim 1, wherein the first emission layer and the second emission layer emit lights having a same color or a different color. ### Claim 8 (depends on 1) The organic light emitting display device of claim 1, wherein one among the first emission layer and the second emission layer includes one among a red emission layer, a green emission layer, and a blue emission layer. ### Claim 9 (depends on 1) The organic light emitting display device of claim 1, further comprising at least one of a hole injection layer and a hole transport layer on the first electrode. ### Claim 10 (depends on 1) The organic light emitting display device of claim 1, further comprising: a P-type charge generation layer on the charge generation layer; a hole transport layer on the P-type charge generation layer; and a second electron transport layer between the second emission layer and the second electrode. ### Claim 11 (depends on 1) The organic light emitting display device of claim 1, further comprising a capping layer on the second electrode. ### Claim 12 An organic light emitting display device, comprising: a first hole transport layer on a first electrode; a plurality of first emission layers on the first hole transport layer; a first electron transport layer on the plurality of first emission layers; a charge generation layer on the first electron transport layer; and a plurality of second emission layers on the charge generation layer, a low unoccupied molecular orbitals (LUMO) level of the first electron transport layer being higher than a LUMO level of a host in the charge generation layer. ### Claim 13 (depends on 12) The organic light emitting display device of claim 12, wherein a difference between the LUMO level of the first electron transport layer and the LUMO level of the host in the charge generation layer is greater than 0.2 eV. ### Claim 14 (depends on 12) The organic light emitting display device of claim 12, wherein a difference between the LUMO level of the first electron transport layer and the LUMO level of the host in the charge generation layer is 0.4 eV or more. ### Claim 15 (depends on 12) The organic light emitting display device of claim 12, wherein the host of the charge generation layer is doped with at least one material among lithium (Li), sodium (Na), potassium (K), cesium (Cs), magnesium (Mg), strontium (Sr), barium (Ba), radium (Ra), Liq, and an N-type dopant. ### Claim 16 (depends on 12) The organic light emitting display device of claim 12, further comprising: a second charge generation layer on the charge generation layer; a second hole transport layer on the second charge generation layer; a second electron transport layer on the plurality of second emission layers; and a second electrode on the second electron transport layer. ### Claim 17 (depends on 16) The organic light emitting display device of claim 16, further comprising a capping layer on the second electrode. ### Claim 18 (depends on 16) The organic light emitting display device of claim 16, wherein the second electrode is formed of a single layer or a multi-layer. ### Claim 19 (depends on 12) The organic light emitting display device of claim 12, wherein the plurality of first emission layers include a red emission layer, a green emission layer, and a blue emission layer. ### Claim 20 (depends on 12) The organic light emitting display device of claim 12, wherein the plurality of second emission layers include a red emission layer, a green emission layer, and a blue emission layer.