# US 11,079,622 B2 · Display panel having reflectors in light adjusting layer and drive method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,622 B2 - Document ID: US11079622B2 - Status: Granted - Kind: B2 - Application number: 16/580,446 - Filed: 2019-09-24 - Published: 2020-01-16 - Granted: 2021-08-03 - Earliest claimed: 2018-01-02 - Assignees: Boe Technology Group Co., Ltd. - Applicants: Boe Technology Group Co., Ltd. - Inventors: Haiyan Sun; Hao Miao; Rui Li; Pengju Zhang; Hong Zhu; Mingxing Liu - Web page: https://patentgrep.com/patent/US11079622B2 ## CPC - G02F 1/19: based on variable-reflection or variable-refraction elements not provided for in groups G02F1/015 - G02F1/169 - G02F 1/0102: {Constructional details, not otherwise provided for in this subclass} - G02F 1/0121: {Operation of devices; Circuit arrangements, not otherwise provided for in this subclass} - G02F 1/1335: Structural association of cells with optical devices, e.g. polarisers or reflectors - H10K 59/50: OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements - G02F 1/133342: {for double-sided displays} - G02F 2201/44: Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers - H10K 59/805: {Electrodes} - H10K 2102/103: {comprising indium oxides, e.g. ITO} - 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 - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display panel includes: a transparent display substrate; an opposite substrate disposed opposite to the transparent display substrate; and a light adjusting layer disposed between the transparent display substrate and the opposite substrate. The light adjusting layer is configured in a way that, under action of an electric field, at least a part of the light adjusting layer transmits light or at least a part of the light adjusting layer reflects light. ## Claims ### Claim 1 A display panel, comprising: a transparent display substrate; an opposite substrate disposed opposite to the transparent display substrate; and a light adjusting layer disposed between the transparent display substrate and the opposite substrate, wherein the light adjusting layer is configured in a way that, under action of an electric field, at least a part of the light adjusting layer transmits light or at least a part of the light adjusting layer reflects light; the light adjusting layer includes a transparent filler and graphene oxide sheets dispersed in the transparent filler, and the graphene oxide sheets are configured to be arranged in a direction parallel to a direction of the electric field under the action of the electric field. ### Claim 2 (depends on 1) The display panel according to claim 1, wherein the reflectors are sheet-shaped reflectors, and the reflectors are configured in a way that plane directions of the reflectors are parallel to the direction of the electric field under the action of the electric field. ### Claim 3 (depends on 1) The display panel according to claim 1, further comprising first driving electrodes and second driving electrodes spaced apart on a side of the opposite substrate facing the transparent display substrate, wherein the first driving electrodes and the second driving electrodes are all made of a transparent conductive material. ### Claim 4 (depends on 3) The display panel according to claim 3, wherein the first driving electrodes and the second driving electrodes are configured to form first electric fields, and a direction of the first electric fields is parallel to a plane direction of the transparent display panel. ### Claim 5 (depends on 4) The display panel according to claim 4, wherein the first driving electrodes and the second driving electrodes are disposed in a same layer. ### Claim 6 (depends on 3) The display panel according to claim 3, wherein the transparent display substrate includes a plurality of display units arranged in an array; the opposite substrate has a plurality of sub-regions corresponding to the plurality of display units, and the display panel includes a first driving electrode and a second driving electrode in each sub-region. ### Claim 7 (depends on 6) The display panel according to claim 6, wherein the transparent display substrate further includes a transparent cover plate; the plurality of display units are disposed on a side of the transparent cover plate facing the opposite substrate; each display unit includes a first transparent electrode, light-emitting functional layers and a second transparent electrode, and the first transparent electrode, the light-emitting functional layers and the second transparent electrode are arranged away from the transparent cover plate in sequence; and the opposite substrate is a transparent array substrate; the opposite substrate includes a driving unit in each sub-region, and the driving unit is configured to control a corresponding display unit to emit light. ### Claim 8 (depends on 7) The display panel according to claim 7, wherein at least one of the first driving electrode and the second driving electrode is configured to form a second electric field together with a corresponding second transparent electrode; a direction of the second electric field is perpendicular to a plane direction of the transparent display substrate. ### Claim 9 (depends on 6) The display panel according to claim 6, wherein the transparent display substrate further comprises a transparent cover plate, first transparent electrodes, light-emitting functional layers and second transparent electrodes, and the first transparent electrodes, the light-emitting functional layers and the second transparent electrodes are disposed on a side of the transparent cover plate facing the opposite substrate in sequence; the first transparent electrodes and the second transparent electrodes are disposed crosswise, and the light-emitting functional layers are disposed in regions where the first transparent electrodes and the second transparent electrodes are crossed; the light-emitting functional layers, the first transparent electrodes and the second transparent electrodes form the display units; and the opposite substrate is a transparent base. ### Claim 10 (depends on 1) The display panel according to claim 1, wherein a thickness of the light adjusting layer is 2 μm to 5 μm. ### Claim 11 (depends on 1) The display panel according to claim 1, wherein the display panel further comprises supporters disposed between the transparent display substrate and the opposite substrate. ### Claim 12 (depends on 1) The display panel according to claim 1, wherein the display panel further comprises a sealant disposed between the transparent display substrate and the opposite substrate, and the sealant is configured to seal the light adjusting layer. ### Claim 13 (depends on 1) A driving method of the display panel according to claim 1, wherein the light adjusting layer includes a transparent filler and graphene oxide sheets dispersed in the transparent filler, and the graphene oxide sheets are configured to be arranged in a direction parallel to a direction of the electric field under the action of the electric field; and the driving method comprising: controlling at least a part of the light adjusting layer to transmit light by an electric field or at least a part of the light adjusting layer to reflect light by an electric field. ### Claim 14 (depends on 13) The driving method according to claim 13, wherein controlling at least a part of the light adjusting layer to transmit light by an electric field or at least a part of the light adjusting layer to reflect light by an electric field, includes: forming first electric fields between first driving electrodes and second driving electrodes, a direction of the first electric fields being parallel to a plane direction of the transparent display substrate. ### Claim 15 (depends on 13) The driving method according to claim 13, wherein controlling at least a part of the light adjusting layer to transmit light by an electric field or at least a part of the light adjusting layer to reflect light by an electric field, includes: forming second electric fields between second transparent electrodes in the transparent display substrate and at least one kind of electrodes of first driving electrodes and second driving electrodes, a direction of the second electric fields being perpendicular to a plane direction of the transparent display substrate.