# US 10,120,220 B2 · Foldable liquid crystal display device and manufacturing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,120,220 B2 - Document ID: US10120220B2 - Status: Granted - Kind: B2 - Application number: 15/125,190 - Filed: 2016-08-19 - Published: 2018-08-02 - Granted: 2018-11-06 - Earliest claimed: 2016-07-15 - Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd. - Inventors: Yuejun Tang - Web page: https://patentgrep.com/patent/US10120220B2 ## CPC - G02F 1/133305: {Flexible substrates, e.g. plastics, organic film} - G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) - G02F 1/133528: {Polarisers} - G02F 1/1336: {Illuminating devices} - G02F 1/1347: Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells - G02F 1/133302: {Rigid substrates, e.g. inorganic substrates} - G02F 2203/01: transmissive - G02F 2203/02: reflective - G06F 1/1641: {the display being formed by a plurality of foldable display components (G06F1/1647 takes precedence)} - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - 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 - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A foldable liquid crystal display device and a method for manufacturing the foldable liquid crystal display device are provided. The foldable liquid crystal display device includes displaying sections, each of which includes a pair of rigid substrates. The displaying sections are connected together with flexible substrates. Folding sections are provided between the displaying sections so that the flexible substrates are foldable along the folding sections to have the displaying sections stacked on each other. Thus, expanding the displaying sections allows for expansion of a displaying area of the liquid crystal display device and folding the displaying sections allows for reduction of a space occupied by the liquid crystal display device to facilitate carrying. By adopting different display modes for different ones of the displaying sections, application scenarios of the liquid crystal display device can be made versatile. ## Claims ### Claim 1 A foldable liquid crystal display device, comprising a first flexible substrate, a second flexible substrate opposite to the first flexible substrate, a liquid crystal layer arranged between the first flexible substrate and the second flexible substrate, a plurality of first rigid substrates arranged apart from each other on a surface of the first flexible substrate that is distant from the second flexible substrate, and a plurality of second rigid substrates arranged on a surface of the second flexible substrate that is distant from the first flexible substrate and respectively corresponding to the plurality of first rigid substrates; each first rigid substrate being paired with one of the plurality of second rigid substrates corresponding to define an area that forms a displaying section of the foldable liquid crystal display device; a spacing area is defined between two adjacent displaying sections, and the spacing area forms a folding section; wherein the first flexible substrate and the second flexible substrate are foldable along the folding section such that the two adjacent displaying sections located on two opposite sides of the folding section are stacked on each other or define an included angle therebetween. ### Claim 2 (depends on 1) The foldable liquid crystal display device as claimed in claim 1, wherein the first rigid substrates and the second rigid substrates each have a number of two to respectively define two displaying sections and one folding section, the two displaying sections being respectively defined as a first displaying section and a second displaying section; the first displaying section and the second displaying section both adopting transmissive displaying; each of the first rigid substrates being provided, on a surface thereof that is distant from the second rigid substrates, with a first polarization plate, each of the second rigid substrates being provided, on a surface thereof that is distant from the first rigid substrates, with a second polarization plate; the first polarization plate of the first displaying section being provided, on a side thereof that is distant from the first rigid substrates, with a first backlight module; the first polarization plate of the second displaying section being provided, on a side thereof that is distant from the first rigid substrates, with a second backlight module. ### Claim 3 (depends on 1) The foldable liquid crystal display device as claimed in claim 1, wherein the first rigid substrates and the second rigid substrates each have a number of two to respectively define two displaying sections and one folding section, the two displaying sections being respectively defined as a first displaying section and a second displaying section; the first displaying section and the second displaying section both adopting transmissive displaying; each of the first rigid substrates being provided, on a surface thereof that is distant from the second rigid substrates, with a first polarization plate, each of the second rigid substrates being provided, on a surface thereof that is distant from the first rigid substrates, with a second polarization plate; the first polarization plate of the first displaying section being provided, on a side thereof that is distant from the first rigid substrates, with a first backlight module; the second polarization plate of the second displaying section being provided, on a side thereof that is distant from the second rigid substrates, with a second backlight module. ### Claim 4 (depends on 2) The foldable liquid crystal display device as claimed in claim 2, wherein the first displaying section and the second displaying section have different ranges of viewing angle. ### Claim 5 (depends on 1) The foldable liquid crystal display device as claimed in claim 1, wherein the first rigid substrates and the second rigid substrates each have a number of two to respectively define two displaying sections and one folding section, the two displaying sections being respectively defined as a first displaying section and a second displaying section; the first displaying section adopting transmissive displaying, the second displaying section adopting reflective displaying; the first rigid substrate of the first displaying section being provided, on a surface thereof that is distant from the second rigid substrates, with a first polarization plate, the second rigid substrate of the first displaying section being provided, on a surface thereof that is distant from the first rigid substrates, with a second polarization plate; the first rigid substrate of the second displaying section being provided, on a surface thereof that is distant from the second rigid substrates, with another first polarization plate; the first polarization plate of the first displaying section being provided, on a side thereof that is distant from the first rigid substrates, with a first backlight module; the second flexible substrate of the second displaying section being provided, on a side thereof adjacent to the first flexible substrate, with a reflective layer. ### Claim 6 A manufacturing method of a foldable liquid crystal display device, comprising the following steps: (1) providing a first rigid main board and forming a first flexible substrate on the first rigid main board; (2) providing a second rigid main board and forming a second flexible substrate on the first rigid main board; (3) combining and boxing the first rigid main board and the second rigid main board that comprise the first flexible substrate and the second flexible substrate formed thereon such that the first flexible substrate and the second flexible substrate are opposite to each other and filling liquid crystal between the first flexible substrate and the second flexible substrate to form a liquid crystal layer; or, alternatively, first dropping liquid crystal onto one flexible substrate of the first flexible substrate and the second flexible substrate and applying enclosure resin thereto and then combining and boxing the first rigid main board and the second rigid main board that comprise the first flexible substrate and the second flexible substrate formed thereon such that the first flexible substrate and the second flexible substrate are opposite to each other and a liquid crystal layer is formed between the first flexible substrate and the second flexible substrate; and (4) cutting the first rigid main board and the second rigid main board so as to respectively form a plurality of first rigid substrates arranged apart from each other on a surface of the first flexible substrate that is distant from the second flexible substrate and a plurality of second rigid substrates arranged on a surface of the second flexible substrate that is distant from the first flexible substrate and respectively corresponding to the plurality of first rigid substrates; wherein each first rigid substrate is paired with one of the plurality of second rigid substrates corresponding to define an area that forms a displaying section of the foldable liquid crystal display device; a spacing area is defined between two adjacent displaying sections, and the spacing area forms a folding section; and the first flexible substrate and the second flexible substrate are foldable along the folding section such that the two adjacent displaying sections located on two opposite sides of the folding section are stacked on each other or define an included angle therebetween. ### Claim 7 (depends on 6) The manufacturing method of the foldable liquid crystal display device as claimed in claim 6, wherein the first rigid substrates and the second rigid substrates each have a number of two to respectively define two displaying sections and one folding section, the two displaying sections being respectively defined as a first displaying section and a second displaying section; the first displaying section and the second displaying section both adopting transmissive displaying; each of the first rigid substrates being provided, on a surface thereof that is distant from the second rigid substrates, with a first polarization plate, each of the second rigid substrates being provided, on a surface thereof that is distant from the first rigid substrates, with a second polarization plate; the first polarization plate of the first displaying section being provided, on a side thereof that is distant from the first rigid substrates, with a first backlight module; the first polarization plate of the second displaying section being provided, on a side thereof that is distant from the first rigid substrates, with a second backlight module. ### Claim 8 (depends on 6) The manufacturing method of the foldable liquid crystal display device as claimed in claim 6, wherein the first rigid substrates and the second rigid substrates each have a number of two to respectively define two displaying sections and one folding section, the two displaying sections being respectively defined as a first displaying section and a second displaying section; the first displaying section and the second displaying section both adopting transmissive displaying; each of the first rigid substrates being provided, on a surface thereof that is distant from the second rigid substrates, with a first polarization plate, each of the second rigid substrates being provided, on a surface thereof that is distant from the first rigid substrates, with a second polarization plate; the first polarization plate of the first displaying section being provided, on a side thereof that is distant from the first rigid substrates, with a first backlight module; the second polarization plate of the second displaying section being provided, on a side thereof that is distant from the second rigid substrates, with a second backlight module. ### Claim 9 (depends on 7) The manufacturing method of the foldable liquid crystal display device as claimed in claim 7, wherein the first displaying section and the second displaying section have different ranges of viewing angle. ### Claim 10 (depends on 6) The manufacturing method of the foldable liquid crystal display device as claimed in claim 6, wherein the first rigid substrates and the second rigid substrates each have a number of two to respectively define two displaying sections and one folding section, the two displaying sections being respectively defined as a first displaying section and a second displaying section; the first displaying section adopting transmissive displaying, the second displaying section adopting reflective displaying; the first rigid substrate of the first displaying section being provided, on a surface thereof that is distant from the second rigid substrates, with a first polarization plate, the second rigid substrate of the first displaying section being provided, on a surface thereof that is distant from the first rigid substrates, with a second polarization plate; the first rigid substrate of the second displaying section being provided, on a surface thereof that is distant from the second rigid substrates, with a first polarization plate; the first polarization plate of the first displaying section being provided, on a side thereof that is distant from the first rigid substrates, with a first backlight module; the second flexible substrate of the second displaying section being provided, on a side thereof adjacent to the first flexible substrate, with a reflective layer. ### Claim 11 A foldable liquid crystal display device, comprising a first flexible substrate, a second flexible substrate opposite to the first flexible substrate, a liquid crystal layer arranged between the first flexible substrate and the second flexible substrate, a plurality of first rigid substrates arranged apart from each other on a surface of the first flexible substrate that is distant from the second flexible substrate, and a plurality of second rigid substrates arranged on a surface of the second flexible substrate that is distant from the first flexible substrate and respectively corresponding to the plurality of first rigid substrates; each first rigid substrate being paired with one of the plurality of second rigid substrate corresponding to define an area that forms a displaying section of the foldable liquid crystal display device; a spacing area is defined between two adjacent displaying sections, and the spacing area forms a folding section; wherein the first flexible substrate and the second flexible substrate are foldable along the folding section such that the two adjacent displaying sections located on two opposite sides of the folding section are stacked on each other or define an included angle therebetween; wherein the first rigid substrates and the second rigid substrates each have a number of two to respectively define two displaying sections and one folding section, the two displaying sections being respectively defined as a first displaying section and a second displaying section; the first displaying section and the second displaying section both adopting transmissive displaying; each of the first rigid substrates being provided, on a surface thereof that is distant from the second rigid substrates, with a first polarization plate, each of the second rigid substrates being provided, on a surface thereof that is distant from the first rigid substrates, with a second polarization plate; the first polarization plate of the first displaying section being provided, on a side thereof that is distant from the first rigid substrates, with a first backlight module; the second polarization plate of the second displaying section being provided, on a side thereof that is distant from the second rigid substrates, with a second backlight module. ### Claim 12 (depends on 11) The foldable liquid crystal display device as claimed in claim 11, wherein the first displaying section and the second displaying section have different ranges of viewing angle.