# US 12,111,537 B2 · Lighting device, display device, and method of manufacturing lighting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,537 B2 - Document ID: US12111537B2 - Status: Granted - Kind: B2 - Application number: 18/418,899 - Filed: 2024-01-22 - Published: 2024-08-22 - Granted: 2024-10-08 - Earliest claimed: 2023-02-21 - Assignees: Sharp Display Technology Corporation - Applicants: Sharp Display Technology Corporation - Inventors: Takeshi Masuda; Hisashi Watanabe; Hirotoshi Yasunaga - Web page: https://patentgrep.com/patent/US12111537B2 ## CPC - G02F 1/133605: {including specially adapted reflectors} - G02F 1/133603: {with LEDs} - H10H 20/852: Encapsulations - H10H 20/856: Reflecting means - H10W 90/00: Package configurations - H10H 20/0363: {of optical field-shaping means} - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - 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 lighting device includes a substrate, a first conductive portion, a second conductive portion disposed with a spacing as to the first conductive portion, a first reflective layer having a first opening coinciding with the first conductive portion and a second opening coinciding with the second conductive portion, a light-emitting part connected to the first conductive portion through the first opening, a non-light-emitting part connected to the second conductive portion through the second opening, and a second reflective layer. The second reflective layer includes a first reflective portion disposed around the light-emitting part, and a second reflective portion disposed around the non-light-emitting part. ## Claims ### Claim 1 Alighting device, comprising: a substrate that has a first principal face; a first conductive portion that is provided on the first principal face of the substrate; a second conductive portion that is provided on the first principal face of the substrate and that is disposed with a spacing as to the first conductive portion; a first reflective layer that is provided on the first principal face of the substrate and that has a first opening coinciding with the first conductive portion, and a second opening coinciding with the second conductive portion; a light-emitting part that is attached on the first principal face of the substrate and that is connected to the first conductive portion through the first opening; a non-light-emitting part that is attached on the first principal face of the substrate and that is connected to the second conductive portion through the second opening; and a second reflective layer that is provided on the first reflective layer, wherein the second reflective layer includes a first reflective portion disposed around the light-emitting part, and a second reflective portion disposed around the non-light-emitting part. ### Claim 2 (depends on 1) The lighting device according to claim 1, wherein a plurality of the second reflective portion are disposed with spacings therebetween following the second opening. ### Claim 3 (depends on 2) The lighting device according to claim 2, wherein, in the first reflective layer, an opening area of the second opening is larger than an opening area of the first opening. ### Claim 4 (depends on 1) The lighting device according to claim 1, wherein a plurality of the light-emitting part are disposed on the first principal face of the substrate with spacings therebetween, in the first reflective layer, a plurality of the first opening are disposed on the first principal face of the substrate with spacings therebetween, and a plurality of the first reflective portion are disposed on the first principal face of the substrate with spacings therebetween. ### Claim 5 (depends on 4) The lighting device according to claim 4, wherein the second reflective layer includes a third reflective portion that is disposed between two of the first reflective portions that are adjacent, with spacing therebetween. ### Claim 6 (depends on 2) The lighting device according to claim 2, wherein the substrate has flexibility. ### Claim 7 (depends on 6) The lighting device according to claim 6, wherein, when sectioning an upper face of the first reflective layer into a first region that is around the light-emitting part and a second region that is around the non-light-emitting part, a first coverage proportion of the first reflective portion covering the first region is greater than a second coverage proportion of the second reflective portion covering the second region. ### Claim 8 (depends on 6) The lighting device according to claim 6, wherein the substrate has a substrate main body to which the light-emitting part and the non-light-emitting part are attached, and a bent portion that extends sidewards from the substrate main body and that is bent, and the first reflective layer is provided to the first principal face of the bent portion, but the second reflective layer is not formed thereon. ### Claim 9 (depends on 1) The lighting device according to claim 1, further comprising: a third reflective layer that is provided on the second reflective layer, wherein the third reflective layer has a third opening that coincides with the first opening, and is disposed coinciding with at least a portion of the first reflective portion of the second reflective layer. ### Claim 10 (depends on 9) The lighting device according to claim 9, further comprising: a sealing portion that is provided on the first principal face of the substrate and that seals the light-emitting part, wherein in the third reflective layer, the third opening has a greater area on the first principal face than the sealing portion. ### Claim 11 (depends on 1) The lighting device according to claim 1, wherein the first reflective portion has a ring-like form that extends along the first opening. ### Claim 12 (depends on 11) The lighting device according to claim 11, further comprising: a sealing portion that is provided on the first principal face of the substrate and that seals the light-emitting part, wherein a radial dimension of the sealing portion is larger than an inner diameter of the first reflective portion, and smaller than an outer diameter of the first reflective portion. ### Claim 13 (depends on 1) The lighting device according to claim 1, wherein the non-light-emitting part includes a driving part that drives the light-emitting part. ### Claim 14 (depends on 1) A display device, comprising: the lighting device according to claim 1; and a display panel that performs display using light from the lighting device. ### Claim 15 A method of manufacturing a lighting device, the method comprising: providing a first reflective layer that has a first opening and a second opening that is provided with a spacing as to the first openings, on a first principal face of a substrate; providing a second reflective layer that has a first reflective portion disposed around the first opening and a second reflective portion disposed around the second opening, on the first reflective layer; providing a first conductive portion that coincides with the first opening, and a second conductive portion that coincides with the second opening, on the first principal face of the substrate; and attaching a light-emitting part that is connected to the first conductive portion through the first opening, and a non-light-emitting part that is connected to the second conductive portion through the second opening, onto the first principal face of the substrate. ### Claim 16 (depends on 15) The method of manufacturing a lighting device according to claim 15, the method further comprising: coating a material of the first conductive portion and the second conductive portion onto the first principal face of the substrate through a fourth opening and a fifth opening of a mask, by setting the mask that has the fourth opening coinciding with the first opening and the fifth opening coinciding with the second opening, on the second reflective layer, at a time of providing the first conductive portion and the second conductive portion, supplying the material of the first conductive portion and the second conductive portion onto the mask, and moving a squeegee disposed on the mask along the mask in a state of being pressed against the mask.