# US 2023/0053740 A1 · Led display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0053740 A1 - Document ID: US20230053740A1 - Status: Published application - Kind: A1 - Application number: 17/976,864 - Filed: 2022-10-30 - Published: 2023-02-23 - Earliest claimed: 2019-10-29 - Assignees: Seoul Viosys Co., Ltd. - Applicants: Seoul Viosys Co., Ltd. - Inventors: Chung Hoon LEE; Dae Sung CHO - Web page: https://patentgrep.com/patent/US20230053740A1 ## CPC - H10H 29/10: Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00 (active-matrix LED displays H10H29/30) - H10H 20/01: Manufacture or treatment - H10H 20/8316: {Multi-layer electrodes comprising at least one discontinuous layer} - H10H 20/84: Coatings, e.g. passivation layers or antireflective coatings - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10W 90/00: Package configurations - H10H 20/032: {of electrodes} - H10H 20/034: {of coatings} - H10H 20/0363: {of optical field-shaping means} - H10H 20/0364: {of interconnections} - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A display apparatus including a display substrate, light emitting devices disposed on the display substrate, circuit electrodes disposed between the light emitting devices and the display substrate, and a transparent layer covering the light emitting devices and the circuit electrodes, in which at least one of the light emitting devices includes a first LED sub-unit configured to emit light having a first wavelength, a second LED sub-unit adjacent to the first LED sub-unit and configured to emit light having a second wavelength, a third LED sub-unit adjacent to the second LED sub-unit and configured to emit light having a third wavelength, and a substrate disposed on the third LED sub-unit, in which a difference in refractive indices between the transparent layer and air is less than a difference in refractive indices between the substrate and a semiconductor layer of the third LED sub-unit. ## Claims ### Claim 1 A display apparatus, comprising: a display substrate; a plurality of light emitting devices disposed on the display substrate; a plurality of circuit electrodes disposed between the light emitting devices and the display substrate; and a transparent layer covering the light emitting devices and the circuit electrodes, wherein at least one of the light emitting devices includes: a first LED sub-unit configured to emit light having a first wavelength; a second LED sub-unit adjacent to the first LED sub-unit and configured to emit light having a second wavelength; a third LED sub-unit adjacent to the second LED sub-unit and configured to emit light having a third wavelength; and a substrate disposed on the third LED sub-unit, and wherein a difference in refractive indices between the transparent layer and air is less than a difference in refractive indices between the substrate and a semiconductor layer of the third LED sub-unit. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein: the transparent layer includes a first portion overlapping the third LED sub-unit; and the third LED sub-unit is disposed closer to the first portion of the transparent layer than the first LED sub-unit. ### Claim 3 (depends on 2) The display apparatus of claim 2, wherein the third LED sub-unit is disposed on the second LED sub-unit, and the second LED sub-unit is disposed on the first LED sub-unit. ### Claim 4 (depends on 1) The display apparatus of claim 1, wherein the first, second, and third LED sub-units are configured to emit red light, blue light, and green light, respectively. ### Claim 5 (depends on 1) The display apparatus of claim 1, wherein: the first LED sub-unit includes a first light emitting stack; the second LED sub-unit includes a second light emitting stack; the third LED sub-unit includes a third light emitting stack; and each of the light emitting stacks includes a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer. ### Claim 6 (depends on 1) The display apparatus of claim 1, wherein the circuit electrodes are electrically connected to each of the first, second, and third LED sub-units. ### Claim 7 (depends on 1) The display apparatus of claim 1, further comprising a light blocking layer disposed between the light emitting devices. ### Claim 8 (depends on 7) The display apparatus of claim 7, wherein the light blocking layer is configured to block light by absorbing light emitted from the light emitting device, and the transparent layer is configured to transmit light emitted from the light emitting device. ### Claim 9 (depends on 1) The display apparatus of claim 1, wherein the substrate is disposed between the display substrate and the circuit electrodes. ### Claim 10 (depends on 1) The display apparatus of claim 1, wherein the first, second, and third LED sub-units overlap each other in one direction. ### Claim 11 A display apparatus, comprising: a display substrate; a plurality of light emitting devices disposed on the display substrate; a plurality of circuit electrodes disposed between the light emitting devices and the display substrate; and a transparent layer covering the light emitting devices and the circuit electrodes, wherein at least one of the light emitting devices includes: a first LED sub-unit configured to emit light having a first wavelength; a second LED sub-unit adjacent to the first LED sub-unit and configured to emit light having a second wavelength; a third LED sub-unit adjacent to the second LED sub-unit and configured to emit light having a third wavelength; and a substrate disposed on the third LED sub-unit, and wherein a refractive index of the transparent layer is greater than a refractive index of air and less than a refractive index of the substrate disposed on the third LED sub-unit. ### Claim 12 (depends on 11) The display apparatus of claim 11, wherein: the transparent layer includes a first portion overlapping the third LED sub-unit; and the third LED sub-unit is disposed closer to the first portion of the transparent layer than the first LED sub-unit. ### Claim 13 (depends on 12) The display apparatus of claim 12, wherein the third LED sub-unit is disposed on the second LED sub-unit, and the second LED sub-unit is disposed on the first LED sub-unit. ### Claim 14 (depends on 11) The display apparatus of claim 11, wherein the circuit electrodes are electrically connected to each of the first, second, and third LED sub-units. ### Claim 15 (depends on 11) The display apparatus of claim 11, wherein the first, second, and third LED sub-units overlap each other in one direction. ### Claim 16 A display apparatus, comprising: a display substrate; a plurality of light emitting devices disposed on the display substrate; a plurality of circuit electrodes disposed between the light emitting devices and the display substrate; and a light transmitting layer covering the light emitting devices and the circuit electrodes, wherein at least one of the light emitting devices includes: a first LED sub-unit configured to emit light having a first wavelength; a second LED sub-unit configured to emit light having a second wavelength; a third LED sub-unit configured to emit light having a third wavelength; and a substrate disposed on the third LED sub-unit, and wherein a refractive index of the light transmitting layer is greater than a refractive index of air and less than a refractive index of the substrate disposed on the third LED sub-unit. ### Claim 17 (depends on 16) The display apparatus of claim 16, wherein: the light transmitting layer includes a first portion overlapping the third LED sub-unit; and the third LED sub-unit is disposed closer to the first portion of the light transmitting layer than the first LED sub-unit. ### Claim 18 (depends on 17) The display apparatus of claim 17, wherein the third LED sub-unit is disposed on the second LED sub-unit, and the second LED sub-unit is disposed on the first LED sub-unit. ### Claim 19 (depends on 16) The display apparatus of claim 16, further comprising a light blocking layer disposed between the light emitting devices. ### Claim 20 (depends on 19) The display apparatus of claim 19, wherein the light blocking layer is configured to block light by absorbing light emitted from the light emitting device, and the light transmitting layer is configured to transmit light emitted from the light emitting device.