# US 10,768,481 B2 · Direct type backlight and method of manufacturing the same, and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,768,481 B2 - Document ID: US10768481B2 - Status: Granted - Kind: B2 - Application number: 16/407,400 - Filed: 2019-05-09 - Published: 2020-03-19 - Granted: 2020-09-08 - Earliest claimed: 2018-09-19 - Assignees: Hefei Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Hefei BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Lu Gao; Bing Zhang; Liang Gao; Jingbin Jie; Hai Tang - Web page: https://patentgrep.com/patent/US10768481B2 ## CPC - G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members} - G02B 19/0014: {at least one surface having optical power} - G02B 19/0066: {in the form of an LED array} - G02B 27/0955: {Lenses (lenses per se G02B3/00)} - G02B 27/0972: {Prisms (prisms per se G02B5/04)} - G02B 27/30: Collimators - G02F 1/133603: {with LEDs} - G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses} - 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 - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A direct type backlight source, a manufacturing method thereof, and a display device are disclosed, the direct type backlight includes a light emitting module including a substrate and a plurality of light emitting units arranged on the substrate; a lens film layer positioned on a light emitting side of the light emitting module, one side of the lens film layer away from the substrate is provided with a plurality of collimating structures arranged in an array, each of the collimating structures includes at least one convex surface structure, and the plurality of collimating structures are in one-to-one correspondence with the plurality of light emitting units. ## Claims ### Claim 1 A light source, comprising: a light emitting module comprising a substrate and a plurality of light emitting units arranged on the substrate; and a lens film layer positioned on a light emitting side of the light emitting module, wherein one side of the lens film layer away from the substrate is provided with a plurality of collimating structures arranged in an array, and each of the collimating structures comprises at least one convex surface structure, wherein the plurality of collimating structures are in one-to-one correspondence with the plurality of light emitting units, and an area of an orthographic projection of each of light emitting units on the substrate is within an area of an orthographic projection of corresponding one of the collimating structures on the substrate, and wherein each of the collimating structures comprises a first convex surface structure and at least one annular convex surface structure arranged around the first convex surface structure, and a focal point of the first convex surface structure coincides with a focal point of the at least one annular convex surface structure. ### Claim 2 (depends on 1) The light source according to claim 1, wherein a light emitting surface of the light emitting units is disposed in direct contact with a light incident surface of the lens film layer. ### Claim 3 (depends on 1) The light source according to claim 1, wherein the annular convex surface structure is disposed around the first convex surface structure. ### Claim 4 (depends on 1) The light source according to claim 1, wherein the focal point of the first convex surface structure coincides with a light incident surface of the lens film layer. ### Claim 5 (depends on 1) The light source according to claim 1, wherein a radius of curvature of the annular convex surface structure is equal to a radius of curvature of the first convex surface structure. ### Claim 6 (depends on 1) The light source according to claim 1, wherein a plurality of blind holes arranged in an array are disposed on one side of the lens film layer close to the substrate. ### Claim 7 (depends on 6) The light source according to claim 6, wherein the plurality of light emitting units are disposed in one-to-one correspondence within the plurality of blind holes. ### Claim 8 (depends on 1) The light guiding structure of claim 1, further comprising: a prism film layer positioned on one side of the lens film layer away from the substrate. ### Claim 9 (depends on 8) The light source according to claim 8, wherein a plurality of first bench-shaped protrusion structures arranged in an array are disposed on one side of the prism film layer close to the lens film layer, the plurality of the first bench-shaped structure are in one-to-one correspondence with the plurality of collimating structures, and an area where each of collimating structures is located is within an area of an orthographic projection of corresponding one of the first bench-shaped protrusion structures on the lens film layer. ### Claim 10 (depends on 9) The light source according to claim 9, wherein a plurality of second bench-shaped protrusion structures arranged in an array are disposed on one side of the prism film layer away from the lens film layer, the plurality of the second bench-shaped structure are in one-to-one correspondence with the plurality of first bench-shaped structures, and an orthographic projection of each of the second bench-shaped protrusion structures on the lens film layer coincides with an orthographic projection of corresponding one of the first bench-shaped protrusion structures on the lens film layer. ### Claim 11 (depends on 10) The light source according to claim 10, wherein each of the first bench-shaped protrusion structures has a first surface parallel to an arrangement surface of the plurality of light emitting units, and an orthographic projection of the first convex surface structure of each of the collimating structures on the first bench-shaped protrusion structures coincides with the first surface; and each of the second bench-shaped protrusion structures has a second surface parallel to the arrangement surface of the plurality of light emitting units, and an orthographic projection of the first convex surface structure of each of the collimating structures on the second bench-shaped protrusion structures coincides with the second surface. ### Claim 12 (depends on 10) The light source according to claim 10, wherein the first bench-shaped protrusion structures and the second bench-shaped protrusion structures are both prismatic structures. ### Claim 13 (depends on 10) The light source according to claim 10, wherein the first bench-shaped protrusion structures and the second bench-shaped protrusion structures are both truncated cone structure. ### Claim 14 (depends on 1) A display device, comprising the light source according to claim 1. ### Claim 15 A method of manufacturing a light source, the method comprising: providing a light emitting module, the light emitting module comprising a substrate and a plurality of light emitting units arranged on the substrate; and providing a lens film layer on a light emitting side of the light emitting module, wherein one side of the lens film layer away from the substrate is provided with a plurality of collimating structures arranged in an array, and each of the collimating structures comprises at least one convex surface structure, wherein the plurality of collimating structures are in one-to-one correspondence with the plurality of light emitting units, and an area of an orthographic projection of each of light emitting units on the substrate is within an area of an orthographic projection of corresponding one of the collimating structures on the substrate, wherein each of the collimating structures comprises a first convex surface structure and at least one annular convex surface structure arranged around the first convex surface structure, and wherein a focal point of the first convex surface structure coincides with a focal point of the at least one annular convex surface structure. ### Claim 16 (depends on 15) The method according to claim 15, further comprising: providing a prism film layer on one side of the lens film layer away from the substrate. ### Claim 17 (depends on 16) The method according to claim 16, wherein a plurality of first bench-shaped protrusion structures arranged in an array are disposed on one side of the prism film layer close to the lens film layer, the plurality of the first bench-shaped structure is in one-to-one correspondence with the plurality of collimating structures, and an area where each of the collimating structures is located is within an area of an orthographic projection of corresponding one of the first bench-shaped protrusion structures on the lens film layer. ### Claim 18 (depends on 17) The method according to claim 17, wherein a plurality of second bench-shaped protrusion structures arranged in an array are disposed on one side of the prism film layer away from the lens film layer, the plurality of the second bench-shaped structure is in one-to-one correspondence with the plurality of first bench-shaped structures, and an orthographic projection of each of the second bench-shaped protrusion structures on the lens film layer coincides with an orthographic projection of corresponding one of the first bench-shaped protrusion structures on the lens film layer. ### Claim 19 A light source, comprising: a light emitting module comprising a substrate and a plurality of light emitting units arranged on the substrate; a lens film layer positioned on a light emitting side of the light emitting module, wherein one side of the lens film layer away from the substrate is provided with a plurality of collimating structures arranged in an array, and each of the collimating structures comprises at least one convex surface structure; and a prism film layer positioned on one side of the lens film layer away from the substrate, wherein the plurality of collimating structures are in one-to-one correspondence with the plurality of light emitting units, and an area of an orthographic projection of each of light emitting units on the substrate is within an area of an orthographic projection of corresponding one of the collimating structures on the substrate, wherein a plurality of first bench-shaped protrusion structures arranged in an array are disposed on one side of the prism film layer close to the lens film layer, wherein the plurality of the first bench-shaped structures are in one-to-one correspondence with the plurality of collimating structures, and wherein an area where each of the collimating structures is located is within an area of an orthographic projection of a corresponding one of the first bench-shaped protrusion structures on the lens film layer. ### Claim 20 (depends on 19) The light source according to claim 19, wherein a plurality of second bench-shaped protrusion structures arranged in an array are disposed on one side of the prism film layer away from the lens film layer, the plurality of the second bench-shaped structure are in one-to-one correspondence with the plurality of first bench-shaped structures, and an orthographic projection of each of the second bench-shaped protrusion structures on the lens film layer coincides with an orthographic projection of corresponding one of the first bench-shaped protrusion structures on the lens film layer.