# US 12,604,579 B2 · Light emitting package structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,579 B2 - Document ID: US12604579B2 - Status: Granted - Kind: B2 - Application number: 17/706,376 - Filed: 2022-03-28 - Published: 2022-10-06 - Granted: 2026-04-14 - Earliest claimed: 2021-03-31 - Assignees: Lite-On Technology Corporation - Applicants: Lite-On Technology Corporation - Inventors: Wei-Chien Hung; Chien-Tung Huang; Hou-Chuan Tsai; Wei-Hsun Hsu - Web page: https://patentgrep.com/patent/US12604579B2 ## CPC - H10H 20/854: characterised by their material, e.g. epoxy or silicone resins - H10H 20/856: Reflecting means - H10H 20/841: Reflective coatings, e.g. dielectric Bragg reflectors - H10H 20/851: Wavelength conversion means - H10H 20/8514: {characterised by their shape, e.g. plate or foil} - 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 20/84: Coatings, e.g. passivation layers or antireflective coatings - H10H 20/882: {Scattering means (H10H20/82 takes precedence)} - 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 light emitting package structure includes a light emitting unit, a reflective layer, a reflective element and an optical layer. The light emitting unit has a top surface, a bottom surface and sidewall surfaces. The bottom surface and the top surface are opposing to each other. The sidewall surfaces are between the top surface and the bottom surface. The light emitting unit further has an electrode portion on the bottom surface. The reflective layer encloses the sidewall surfaces of the light emitting unit. The reflective element is disposed on the light emitting unit and the reflective layer. The optical layer includes a phosphor layer, a light diffusion layer or a combination thereof. The optical layer is disposed between the top surface of the light emitting unit and the reflective element. ## Claims ### Claim 1 A light emitting package structure, comprising: a light emitting unit having a top surface, a bottom surface opposing to the top surface, and sidewall surfaces between the top surface and the bottom surface, wherein the light emitting unit further has an electrode portion on the bottom surface; a reflective layer enclosing the sidewall surfaces of the light emitting unit; a reflective element disposed on the light emitting unit and the reflective layer, and having an upper surface and a lower surface opposite to the upper surface of reflective element; a light blocking layer disposed on the reflective element; and an optical layer having an upper surface and a lower surface opposite to the upper surface of the optical layer, wherein the optical layer comprises a phosphor layer, a light diffusion layer or a combination thereof, wherein, the lower surface of the reflective element fully covers and is in contact with the upper surface of the optical layer, thereby preventing the upper surface of the optical layer from being exposed, and the lower surface of the optical layer is in contact with the top surface of the light emitting unit. ### Claim 2 (depends on 1) The light emitting package structure according to claim 1, wherein the electrode portion of the light emitting unit is exposed by an external surface of the light emitting package structure. ### Claim 3 (depends on 1) The light emitting package structure according to claim 1, wherein a top surface of the reflective layer is substantially level with the top surface of the light emitting unit. ### Claim 4 (depends on 1) The light emitting package structure according to claim 1, wherein the reflective element has one or more reflective extension portions covering a portion of a sidewall surface of the optical layer and a portion of a sidewall surface of the reflective layer. ### Claim 5 (depends on 4) The light emitting package structure according to claim 4, wherein the one or more reflective extension portions cover one surface, two surfaces or three sidewall surfaces of the optical layer. ### Claim 6 (depends on 5) The light emitting package structure according to claim 5, wherein the light blocking layer has one or more light blocking extension portions covering the one or more reflective extension portions. ### Claim 7 (depends on 1) The light emitting package structure according to claim 1, wherein a lateral size of the light blocking layer and the reflective element becomes smaller gradually along a direction from a bottom of the reflective element to a top of the light blocking layer. ### Claim 8 (depends on 1) The light emitting package structure according to claim 1, wherein the light emitting unit comprises a blue LED chip. ### Claim 9 (depends on 8) The light emitting package structure according to claim 8, further comprising one or more additional light emitting units. ### Claim 10 (depends on 9) The light emitting package structure according to claim 9, wherein the one or more additional light emitting units are a red LED chip, a green LED chip or a combination thereof. ### Claim 11 (depends on 9) The light emitting package structure according to claim 9, wherein the reflective layer encloses sidewall surfaces of the one or more additional light emitting units. ### Claim 12 (depends on 1) The light emitting package structure according to claim 1, wherein a transmittance of the light diffusion layer is 99% or higher. ### Claim 13 (depends on 1) The light emitting package structure according to claim 1, wherein the reflective element and the reflective layer have a light reflectance of 95% or higher. ### Claim 14 (depends on 1) The light emitting package structure according to claim 1, wherein the light blocking layer has an upper surface and a lower surface opposite to the upper surface of the light blocking layer, and the lower surface of the light blocking layer covers and is in contact with the upper surface of the reflective element.