# US 12,765,241 B2 · Organic light emitting display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,765,241 B2 - Document ID: US12765241B2 - Status: Granted - Kind: B2 - Application number: 18/397,392 - Filed: 2023-12-27 - Published: 2024-08-01 - Granted: 2026-10-13 - Earliest claimed: 2023-01-30 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: JiYoung Ahn - Web page: https://patentgrep.com/patent/US12765241B2 ## CPC - H10K 59/879: {comprising refractive means, e.g. lenses} - H10K 59/127: comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates - H10K 59/351: {comprising more than three subpixels, e.g. red-green-blue-white [RGBW]} - H10K 59/87: {Passivation; Containers; Encapsulations} - H10K 2102/351: {Thickness} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract An organic light emitting display apparatus includes a plurality of pixels on a substrate, each including a plurality of subpixels each including an emission area, a planarization layer including a light extraction pattern which is at the emission area of each of the plurality of subpixels and includes a plurality of concave portions and a convex portion surrounding each of the plurality of concave portions, a light emitting device layer on the light extraction pattern, and a phase grating portion between the substrate and the light extraction pattern to overlap the emission area of each of the plurality of subpixels. ## Claims ### Claim 1 An organic light emitting display apparatus, comprising: a plurality of pixels on a substrate, each including a plurality of subpixels each having an emission area; a planarization layer including a light extraction pattern which is at the emission area of each of the plurality of subpixels and includes a plurality of concave portions and a convex portion surrounding each of the plurality of concave portions; a light emitting device layer on the light extraction pattern; and a phase grating portion between the substrate and the light extraction pattern to overlap the emission area of each of the plurality of subpixels. ### Claim 2 (depends on 1) The organic light emitting display apparatus of claim 1, wherein: the phase grating portion comprises a plurality of pattern regions configured to change a light path and/or a phase of reflection light reflected from the light extraction pattern based on a refractive index difference or a dielectric constant difference. ### Claim 3 (depends on 2) The organic light emitting display apparatus of claim 2, wherein: the plurality of pattern regions have a refractive index difference therebetween. ### Claim 4 (depends on 3) The organic light emitting display apparatus of claim 3, wherein: the plurality of pattern regions have a refractive index difference of 0.1 or more therebetween. ### Claim 5 (depends on 1) The organic light emitting display apparatus of claim 1, further comprising an insulation layer between the substrate and the light extraction pattern, wherein the phase grating portion is configured at the insulation layer. ### Claim 6 (depends on 5) The organic light emitting display apparatus of claim 5, wherein the insulation layer comprises: a first insulation layer having a first refractive index; and a second insulation layer having a second refractive index which differs from the first refractive index, the second insulation layer being stacked on the first insulation layer. ### Claim 7 (depends on 6) The organic light emitting display apparatus of claim 6, wherein: the phase grating portion comprises a first pattern region and a second pattern region, the first pattern region comprises all of the first insulation layer and the second insulation layer, and the second pattern region comprises only the second insulation layer of the first insulation layer and the second insulation layer, or comprises a region from which all of the first insulation layer and the second insulation layer have been removed. ### Claim 8 (depends on 7) The organic light emitting display apparatus of claim 7, wherein first insulation layers of the first pattern region respectively at the plurality of subpixels have different thicknesses. ### Claim 9 (depends on 7) The organic light emitting display apparatus of claim 7, wherein: the second pattern region comprises only the second insulation layer, and the second insulation layer contacts the substrate at the second pattern region. ### Claim 10 (depends on 7) The organic light emitting display apparatus of claim 7, further comprising a passivation layer between the insulation layer and the light extraction pattern, wherein the second pattern region comprises a region from which all of the first insulation layer and the second insulation layer have been removed, and wherein the passivation layer contacts the substrate at the second pattern region. ### Claim 11 (depends on 6) The organic light emitting display apparatus of claim 6, wherein the phase grating portion comprises: a plurality of first pattern regions disposed in a grating pattern shape; and a plurality of second pattern regions between the plurality of first pattern regions, respectively, wherein each of the plurality of first pattern regions comprises all of the first insulation layer and the second insulation layer, and wherein each of the plurality of second pattern regions comprises only the second insulation layer of the first insulation layer and the second insulation layer, or comprises a region from which all of the first insulation layer and the second insulation layer have been removed. ### Claim 12 (depends on 6) The organic light emitting display apparatus of claim 6, wherein the phase grating portion comprises: a plurality of first pattern regions, each of which overlaps at least a portion of a corresponding concave portion of the plurality of concave portions; and a plurality of second pattern regions between the plurality of first pattern regions, respectively, wherein each of the plurality of first pattern regions comprises all of the first insulation layer and the second insulation layer, and wherein each of the plurality of second pattern regions comprises only the second insulation layer of the first insulation layer and the second insulation layer, or comprises a region from which all of the first insulation layer and the second insulation layer have been removed. ### Claim 13 (depends on 12) The organic light emitting display apparatus of claim 12, wherein: the first pattern region comprises a circular shape, an oval shape, a three or more-angled polygonal shape, or a same shape as a shape of the concave portion, or the first pattern region has a same size as a size of the concave portion, or has a size which is smaller than a size of the concave portion. ### Claim 14 (depends on 6) The organic light emitting display apparatus of claim 6, wherein the phase grating portion comprises: a plurality of first pattern regions, each of which overlaps the convex portion; and a second pattern region between the plurality of first pattern regions. ### Claim 15 (depends on 14) The organic light emitting display apparatus of claim 14, wherein: each of the plurality of first pattern regions is configured to overlap one or more of corner portions of the convex portion. ### Claim 16 (depends on 6) The organic light emitting display apparatus of claim 6, wherein: the emission area of each of the plurality of subpixels comprises a plurality of division regions, and the phase grating portion is configured at each of the plurality of division regions. ### Claim 17 (depends on 16) The organic light emitting display apparatus of claim 16, wherein the plurality of division regions are disposed along one or more direction of a first direction, a second direction intersecting with the first direction, and a diagonal direction between the first direction and the second direction. ### Claim 18 (depends on 17) The organic light emitting display apparatus of claim 17, wherein each of the plurality of division regions includes a tetragonal shape or a triangular shape. ### Claim 19 (depends on 6) The organic light emitting display apparatus of claim 6, wherein: the emission area of each of the plurality of subpixels comprises first to fourth division regions, and the phase grating portion comprises one or more first pattern regions and one or more second pattern regions configured at each of the first to fourth division regions. ### Claim 20 (depends on 6) The organic light emitting display apparatus of claim 6, wherein: the emission area of each of the plurality of subpixels comprises a first division region and a second division region, and the first division region is configured with only the first pattern region, and the second division region is configured with only the second pattern region. ### Claim 21 (depends on 20) The organic light emitting display apparatus of claim 20, wherein: the one or more first pattern regions comprise all of the first insulation layer and the second insulation layer, and the one or more second pattern regions comprise only the second insulation layer of the first insulation layer and the second insulation layer, or comprises a region from which all of the first insulation layer and the second insulation layer have been removed. ### Claim 22 (depends on 1) The organic light emitting display apparatus of claim 1, wherein: the light extraction patterns at each of the plurality of subpixels have a structure which has rotated about a reference point within a corresponding emission area, and one or more of the light extraction patterns at each of the plurality of subpixels have rotated by different angles. ### Claim 23 (depends on 22) The organic light emitting display apparatus of claim 22, wherein a rotation angle of the light extraction pattern at each of the plurality of subpixels differs from each other by pixel units. ### Claim 24 (depends on 22) The organic light emitting display apparatus of claim 22, wherein: each of the plurality of concave portions or the convex portion has a planar structure having a hexagonal shape or a honeycomb shape; and a rotation angle of the light extraction pattern is greater than 0 degrees and smaller than 60 degrees. ### Claim 25 (depends on 1) The organic light emitting display apparatus of claim 1, further comprising a color filter layer between the light extraction pattern and the phase grating portion.