# US 2024/0201527 A1 · Privacy film 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 2024/0201527 A1 - Document ID: US20240201527A1 - Status: Published application - Kind: A1 - Application number: 17/758,229 - Filed: 2022-06-02 - Published: 2024-06-20 - Earliest claimed: 2022-05-20 - Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd. - Inventors: Wenlong Ye; Wei Cheng - Web page: https://patentgrep.com/patent/US20240201527A1 ## CPC - G02F 1/1323: {Arrangements for providing a switchable viewing angle} - G02F 1/13345: {Network or three-dimensional gels} - G02F 1/1335: Structural association of cells with optical devices, e.g. polarisers or reflectors - G02F 1/133531: {characterised by the arrangement of polariser or analyser axes} - G02F 1/134309: {characterised by their geometrical arrangement} - 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 ## Abstract A privacy film and a display device are provided. The privacy film includes a first polarizer, a first electrode layer, a dimming liquid crystal layer, a second electrode layer, and a second polarizer. The first polarizer, the first electrode layer, the dimming liquid crystal layer, the second electrode layer, and the second polarizer are stacked in sequence, so that multi-angle privacy protection can be achieved. ## Claims ### Claim 1 A privacy film, comprising: a first polarizer; a first electrode layer; a dimming liquid crystal layer; a second electrode layer; and a second polarizer, wherein the first polarizer, the first electrode layer, the dimming liquid crystal layer, the second electrode layer, and the second polarizer are stacked in sequence; wherein the first electrode layer comprises at least two first electrode plates spaced apart from each other, the second electrode layer comprises at least a second electrode plate, and an orthographic projection of the second electrode plate on the first electrode layer falls between adjacent ones of the first electrode plates, wherein at least two electric fields in different directions are created between adjacent ones of the first electrode plate and the second electrode plate, and an optical axis direction of the first polarizer is parallel to an optical axis direction of the second polarizer. ### Claim 2 (depends on 1) The privacy film of claim 1, wherein the first electrode plate comprises at least two first sub-electrode plates connected end to end in sequence, and adjoining ones of the first sub-electrode plates are disposed at an angle with respect to each other, wherein the second electrode plate comprises at least two second sub-electrode plates connected end to end in sequence, and adjoining ones of the second sub-electrode plates are disposed at an angle with respect to each other. ### Claim 3 (depends on 2) The privacy film of claim 2, wherein the first sub-electrode plates arranged in odd-numbered segments are parallel to each other, and the second sub-electrode plates arranged in odd-numbered segments are parallel to each other. ### Claim 4 (depends on 2) The privacy film of claim 2, wherein the first sub-electrode plates arranged in even-numbered segments are parallel to each other, and the second sub-electrode plates arranged in even-numbered segments are parallel to each other. ### Claim 5 (depends on 2) The privacy film of claim 2, wherein the angle between the adjoining first sub-electrode plates is 90 degrees, and the angle between the adjoining second sub-electrode plates is 90 degrees. ### Claim 6 (depends on 2) The privacy film of claim 2, wherein the first electrode plate comprises a first segment of the first sub-electrode plate and a second segment of the first sub-electrode plate, and the second electrode plate comprises a first segment of the second sub-electrode plate and a second segment of the second sub-electrode plate; wherein the first segment of the first sub-electrode plate is parallel to the first segment of the second sub-electrode plate, and the second segment of the first sub-electrode plate is parallel to the second segment of the second sub-electrode plate. ### Claim 7 (depends on 6) The privacy film of claim 6, wherein the first electrode plate further comprises a third segment of the first sub-electrode plate connected to the second segment of the first sub-electrode plate, the second electrode plate further comprises a third segment of the second sub-electrode plate connected to the second segment of the second sub-electrode plate, and the third segment of the first sub-electrode plate is parallel to the third segment of the second sub-electrode plate. ### Claim 8 (depends on 7) The privacy film of claim 7, wherein the first segment of the first sub-electrode plate is parallel to the third segment of the first sub-electrode plate. ### Claim 9 (depends on 7) The privacy film of claim 7, wherein the first segment of the first sub-electrode plate is not parallel to the third segment of the first sub-electrode plate. ### Claim 10 (depends on 1) The privacy film of claim 1, wherein in a first mode, an angle between a major axis of each of liquid crystal molecules in the dimming liquid crystal layer and a normal line of the first polarizer is a, and a is greater than or equal to 85 degrees and less than or equal to 90 degrees, or a is greater than or equal to zero degrees and less than or equal to five degrees, wherein in a second mode, the major axes of the liquid crystal molecules in the dimming liquid crystal layer are tilted with respect to the normal line of the first polarizer in at least four directions. ### Claim 11 (depends on 10) The privacy film of claim 10, wherein in the second mode, an angle between the major axes of the liquid crystal molecules in the dimming liquid crystal layer and the normal line of the first polarizer is an acute angle. ### Claim 12 (depends on 11) The privacy film of claim 11, wherein in the second mode, the angle between the major axes of the liquid crystal molecules in the dimming liquid crystal layer and the normal line of the first polarizer ranges from 20 degrees to 40 degrees. ### Claim 13 (depends on 1) The privacy film of claim 1, wherein the dimming liquid crystal layer comprises a polymer network and liquid crystal molecules distributed in the polymer network. ### Claim 14 A display device, comprising: a privacy film; and a display panel; wherein the privacy film comprises: a first polarizer; a first electrode layer; a dimming liquid crystal layer; a second electrode layer; and a second polarizer, wherein the first polarizer, the first electrode layer, the dimming liquid crystal layer, the second electrode layer, and the second polarizer are stacked in sequence; wherein the first electrode layer comprises at least two first electrode plates spaced apart from each other, the second electrode layer comprises at least a second electrode plate, and an orthographic projection of the second electrode plate on the first electrode layer falls between adjacent ones of the first electrode plates, wherein at least two electric fields in different directions are created between the adjacent ones of the first electrode plate and the second electrode plate, and an optical axis direction of the first polarizer is parallel to an optical axis direction of the second polarizer; wherein the display panel is disposed on a side of the first polarizer or the second polarizer away from the dimming liquid crystal layer. ### Claim 15 (depends on 14) The display device of claim 14, wherein the first electrode plate comprises at least two first sub-electrode plates connected end to end in sequence, and adjoining ones of the first sub-electrode plates are disposed at an angle with respect to each other, wherein the second electrode plate comprises at least two second sub-electrode plates connected end to end in sequence, and adjoining ones of the second sub-electrode plates are disposed at an angle with respect to each other. ### Claim 16 (depends on 15) The display device of claim 15, wherein the first electrode plate comprises a first segment of the first sub-electrode plate and a second segment of the first sub-electrode plate, and the second electrode plate comprises a first segment of the second sub-electrode plate and a second segment of the second sub-electrode plate; wherein the first segment of the first sub-electrode plate is parallel to the first segment of the second sub-electrode plate, and the second segment of the first sub-electrode plate is parallel to the second segment of the second sub-electrode plate. ### Claim 17 (depends on 16) The display device of claim 16, wherein the first electrode plate further comprises a third segment of the first sub-electrode plate connected to the second segment of the first sub-electrode plate, the second electrode plate further comprises a third segment of the second sub-electrode plate connected to the second segment of the second sub-electrode plate, and the third segment of the first sub-electrode plate is parallel to the third segment of the second sub-electrode plate. ### Claim 18 (depends on 17) The display device of claim 17, wherein the first segment of the first sub-electrode plate is parallel to the third segment of the first sub-electrode plate. ### Claim 19 (depends on 17) The display device of claim 17, wherein the first segment of the first sub-electrode plate is not parallel to the third segment of the first sub-electrode plate. ### Claim 20 (depends on 14) The display device of claim 14, wherein the dimming liquid crystal layer comprises a polymer network and liquid crystal molecules distributed in the polymer network.