# US 12,604,576 B2 · Display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,576 B2 - Document ID: US12604576B2 - Status: Granted - Kind: B2 - Application number: 18/329,590 - Filed: 2023-06-06 - Published: 2023-12-07 - Granted: 2026-04-14 - Earliest claimed: 2022-06-07 - Assignees: AUO Corporation - Applicants: AUO Corporation - Inventors: Chih-Wei Chien - Web page: https://patentgrep.com/patent/US12604576B2 ## CPC - H10H 20/853: characterised by their shape - H10H 20/854: characterised by their material, e.g. epoxy or silicone resins - H10H 20/855: Optical field-shaping means, e.g. lenses - H10W 90/00: Package configurations - H10H 20/84: Coatings, e.g. passivation layers or antireflective coatings - 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 circuit substrate, a plurality of light-emitting units, an optical film, a first adhesive layer and a second adhesive layer is provided. The light-emitting units are electrically bonded to the circuit substrate. The optical film overlaps the light-emitting units that are disposed between the optical film and the circuit substrate. The optical film includes a light reduction film overlapping a light-emitting surface of the light-emitting units away from the circuit substrate. The first adhesive layer is disposed between the light reduction film and the light-emitting units, and extends into interspaces between the light-emitting units. The second adhesive layer is disposed between the first adhesive layer and the light reduction film. The second adhesive layer has a first portion overlapping the light-emitting units and a second portion overlapping the interspaces. A thickness of the first portion is different from a thickness of the second portion. ## Claims ### Claim 1 A display apparatus, comprising: a circuit substrate; a plurality of light-emitting units, electrically bonded to the circuit substrate; an optical film, overlapping the light-emitting units, wherein the light-emitting units are disposed between the optical film and the circuit substrate, and the optical film comprises: a light reduction film, overlapping a light-emitting surface of the light-emitting units away from the circuit substrate; a first adhesive layer, disposed between the light reduction film and the light-emitting units and extending into a plurality of interspaces between the light-emitting units; and a second adhesive layer, disposed between the first adhesive layer and the light reduction film, and connecting the first adhesive layer, wherein the second adhesive layer has a first portion overlapping the light-emitting units and a second portion overlapping the interspaces, a thickness of the first portion is different from a thickness of the second portion, the first adhesive layer has a first surface overlapping the light-emitting surface of the light-emitting units and a second surface located between the light-emitting units and not overlapping the light-emitting units, a substrate surface of the circuit substrate is provided with the light-emitting units, and a height of the first surface of the first adhesive layer relative to the substrate surface is higher than a height of the second surface of the first adhesive layer relative to the substrate surface. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein the optical film further comprises: a surface treatment layer, disposed on a side of the light reduction film away from the light-emitting units, and the surface treatment layer is an anti-glare layer, an anti-reflection layer, an anti-glare low-reflection layer, an anti-reflection anti-glare layer, or a low-reflection layer. ### Claim 3 (depends on 1) The display apparatus according to claim 1, wherein the light reduction film is a spectral absorption filter or a polarized absorption filter. ### Claim 4 (depends on 3) The display apparatus according to claim 3, wherein a transmittance of the light reduction film is between 40% and 60%, and the light reduction film is a polarizer or a phase retarder. ### Claim 5 (depends on 3) The display apparatus according to claim 3, wherein a transmittance of the light reduction film is between 20% and 70%, and a material of the light reduction film comprises poly(methyl methacrylate), polycarbonate, polyethylene terephthalate, cellulose triacetate, cycloolefin polymer, or glass. ### Claim 6 (depends on 5) The display apparatus according to claim 5, wherein the light reduction film has a film material and a plurality of light-absorbing particles dispersed in the film material, and the light-absorbing particles are unevenly distributed in the film material along a thickness direction of the film material. ### Claim 7 (depends on 1) The display apparatus according to claim 1, wherein materials of the first adhesive layer and the second adhesive layer is selected from polyurethane reactive, epoxy resin, silicone adhesive, poly(methyl methacrylate) based polymer, or photocurable adhesive. ### Claim 8 (depends on 1) The display apparatus according to claim 1, wherein a transmittance of the second adhesive layer is greater than 70%. ### Claim 9 (depends on 1) The display apparatus according to claim 1, wherein a Shore hardness of the second adhesive layer is between A20 and D80. ### Claim 10 (depends on 1) The display apparatus according to claim 1, wherein a hardness of the second adhesive layer is less than a hardness of the first adhesive layer. ### Claim 11 (depends on 1) The display apparatus according to claim 1, wherein each of the light-emitting units is a packaged light-emitting element. ### Claim 12 (depends on 11) The display apparatus according to claim 11, wherein a thickness of each of the light-emitting units along a thickness direction of the circuit substrate is greater than 300 microns. ### Claim 13 (depends on 11) The display apparatus according to claim 11, wherein the first adhesive layer covers the light-emitting surface of the light-emitting units. ### Claim 14 (depends on 13) The display apparatus according to claim 13, wherein a height difference between the first surface and the second surface relative to the substrate surface is greater than 5 microns. ### Claim 15 (depends on 1) The display apparatus according to claim 1, wherein the thickness of the second portion is greater than the thickness of the first portion of the second adhesive layer. ### Claim 16 (depends on 15) The display apparatus according to claim 15, wherein the thickness of the first portion of the second adhesive layer is less than 200 microns.