# US 10,502,884 B2 · Light guide plate, manufacturing method thereof, backlight module 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 10,502,884 B2 - Document ID: US10502884B2 - Status: Granted - Kind: B2 - Application number: 15/092,918 - Filed: 2016-04-07 - Published: 2016-11-03 - Granted: 2019-12-10 - Earliest claimed: 2015-04-29 - Assignees: Boe Technology Group Co., Ltd. - Applicants: Boe Technology Group Co., Ltd. - Inventors: Guangkui Qin; Xinxing Wang; Ming Zhu - Web page: https://patentgrep.com/patent/US10502884B2 ## CPC - G02B 6/005: {provided by one optical element, or plurality thereof, placed on the light output side of the light guide} - G02B 6/0043: {provided on the surface of the light guide} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract The invention discloses a light guide plate, a manufacturing method thereof, a backlight module and a display device. The light guide plate comprises a main body, a transparent material layer is arranged on a surface of the main body, and a scattering structure is arranged in the transparent material layer. The scattering structure can change the outgoing direction of first light entering the scattering structure, so that the first light has different outgoing directions, and thus a display panel can achieve normal display even in a dark environment. ## Claims ### Claim 1 A light guide plate, comprising a main body with a plate shape, wherein a transparent material layer with a plate shape is laminated on a surface of the main body, and a plurality of scattering structures are arranged in the transparent material layer, and are configured to change outgoing direction of first light entering the plurality of scattering structures, so that the first light has different outgoing directions, wherein a plurality of absorbing structures are arranged on a side of the plurality of scattering structures away from the main body and are configured to absorb second light entering the plurality of absorbing structures, wherein both the plurality of scattering structures and the plurality of absorbing structures are distributed as mesh spots spaced apart from each other. ### Claim 2 (depends on 1) The light guide plate of claim 1, wherein the plurality of scattering structures and the plurality of absorbing structures are in one-to-one correspondence. ### Claim 3 (depends on 1) The light guide plate of claim 1, wherein the plurality of scattering structures have convex surfaces protruding towards the main body on one side of the plurality of scattering structures close to the main body, and the convex surfaces are arc-shaped. ### Claim 4 (depends on 1) The light guide plate of claim 1, wherein the main body is made of polymethyl methacrylate, and the transparent material layer is made of optical clear adhesive. ### Claim 5 (depends on 1) A backlight module, comprising the light guide plate of claim 1. ### Claim 6 (depends on 5) The backlight module of claim 5, wherein the plurality of scattering structures and the plurality of absorbing structures are in one-to-one correspondence. ### Claim 7 (depends on 5) The backlight module of claim 5, wherein the plurality of scattering structures have convex surfaces protruding towards the main body on one side of the plurality of scattering structures close to the main body, and the convex surfaces are arc-shaped. ### Claim 8 (depends on 5) The backlight module of claim 5, wherein the main body is made of polymethyl methacrylate, and the transparent material layer is made of optical clear adhesive. ### Claim 9 (depends on 5) A display device, comprising the backlight module of claim 5. ### Claim 10 (depends on 9) The display device of claim 9, wherein the plurality of scattering structures and the plurality of absorbing structures are in one-to-one correspondence. ### Claim 11 (depends on 9) The display device of claim 9, wherein the plurality of scattering structures in the backlight module have a convex surface protruding towards the main body of the light guide plate on one side of the plurality of scattering structures close to the main body, and the convex surface is arc-shaped. ### Claim 12 (depends on 9) The display device of claim 9, wherein the main body of the light guide plate in the backlight module is made of polymethyl methacrylate, and the transparent material layer is made of optical clear adhesive. ### Claim 13 (depends on 9) The display device of claim 9, wherein the plurality of absorbing structures are made of a black absorbing material. ### Claim 14 (depends on 5) The backlight module of claim 5, wherein the plurality of absorbing structures are made of a black absorbing material. ### Claim 15 (depends on 1) The light guide plate of claim 1, wherein the plurality of absorbing structures are made of a black absorbing material. ### Claim 16 A manufacturing method of a light guide plate, comprising: laminating a transparent material layer with a plate shape on a main body of the light guide plate, wherein the main body has a plate shape; forming a plurality of scattering structures distributed as mesh spots spaced apart from each other in the transparent material layer, wherein the plurality of scattering structures are configured to change outgoing direction of first light entering the plurality of scattering structures, so that the first light has different outgoing directions; and forming a plurality of absorbing structures distributed as mesh spots spaced apart from each other on a side of the plurality of scattering structures away from the main body, wherein the plurality of absorbing structures are configured to absorb second light entering the plurality of absorbing structures. ### Claim 17 (depends on 16) The manufacturing method of claim 16, wherein the step of forming the plurality of scattering structures distributed as mesh spots spaced apart from each other in the transparent material layer comprises: forming a plurality of groove distributed as mesh spots spaced apart from each other in the transparent material layer; and forming the plurality of scattering structures in the plurality of grooves, wherein a depth of the plurality of grooves in the transparent material layer is greater than a thicknesses of the plurality of scattering structures in a depth direction of the grooves the step of forming the plurality of absorbing structures distributed as mesh spots spaced apart from each other on the side of the plurality of scattering structures away from the main body comprises: forming the plurality of absorbing structures in the plurality of grooves with the plurality of scattering structures formed therein. ### Claim 18 (depends on 17) The manufacturing method of claim 17, wherein the plurality of scattering structures and the plurality of absorbing structures are formed to be in one-to-one correspondence. ### Claim 19 (depends on 17) The manufacturing method of claim 17, wherein a bottom surface of the plurality of grooves is in the shape of a concave arc. ### Claim 20 (depends on 16) The manufacturing method of claim 16, wherein the plurality of absorbing structures are made of a black absorbing material.