# US 10,371,970 B2 · Display screen having mirror function, control method, device and terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,970 B2 - Document ID: US10371970B2 - Status: Granted - Kind: B2 - Application number: 15/513,391 - Filed: 2015-07-20 - Published: 2017-10-19 - Granted: 2019-08-06 - Earliest claimed: 2014-09-25 - Assignees: Zte Corporation - Applicants: Zte Corporation - Inventors: Jun Li - Web page: https://patentgrep.com/patent/US10371970B2 ## CPC - H04M 1/0266: {for a display module assembly} - G02F 1/091: {based on magneto-absorption or magneto-reflection} - G02F 1/092: {Operation of the cell; Circuit arrangements} - G02F 1/13: based on liquid crystals, e.g. single liquid crystal display cells - G02F 1/133: Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements (arrangements or circuits for control of liquid crystal elements in a matrix, not structurally associated with these elements G09G3/36) - G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) - G02F 1/1673: by magnetophoresis - H04M 1/02: Constructional features of telephone sets - G02F 1/172: {based on a suspension of orientable dipolar particles, e.g. suspended particles displays} - G02F 2201/44: Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers - G02F 2202/36: Micro- or nanomaterials - G02F 2203/02: reflective - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - 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 Disclosed a display screen having a mirror function, a control method, a device and a terminal. The display screen includes: a screen lens (20), a liquid crystal screen (22) and a nano suspension layer (21), wherein the nano suspension layer (21) is disposed between the screen lens and the liquid crystal display. The control method includes: controlling the magnetic layer to provide a static magnetic field perpendicular to the display screen upon receipt of the trigger-off signal; and controlling the upper plate to provide a voltage, or controlling the upper plate to provide a voltage and controlling the magnetic layer to provide a static magnetic field perpendicular to the display screen upon receipt of the trigger-on signal. ## Claims ### Claim 1 A control device for a display screen having a mirror function, comprising: a display screen having a mirror function, a first trigger, a second trigger and a controller, wherein the display screen comprises a screen lens, a liquid crystal display, a nano suspension layer, and a magnetic layer provided on a back surface of the liquid crystal display; the nano suspension layer is disposed between the screen lens and the liquid crystal display; the nano suspension layer comprises an upper plate, a nanomaterial layer and a grounding plate; the upper plate is disposed between the screen lens and the nanomaterial layer and the grounding plate is disposed between the liquid crystal display and the nanomaterial layer; the first trigger is arranged to send a trigger-on signal to the controller when a first predetermined condition is satisfied; the second trigger is arranged to send a trigger-off signal to the controller when a second predetermined condition is satisfied; and the controller is arranged to control the magnetic layer to provide a static magnetic field perpendicular to the display screen upon receipt of the trigger-off signal; and to control the upper plate to provide a voltage, or control the upper plate to provide a voltage and control the magnetic layer to provide a static magnetic field perpendicular to the display screen upon receipt of the trigger-on signal. ### Claim 2 (depends on 1) The device of claim 1, wherein the predetermined condition is a light screen signal or an unlock signal or a mirror function disabling signal inputter by a user, and the second predetermined condition is a black screen signal or a lock screen signal or a receipt of a mirror function enabling signal inputted by the user. ### Claim 3 A control method for a display screen having a mirror function, applied in a display screen, wherein the display screen comprises a screen lens, a liquid crystal display, a nano suspension layer, and a magnetic layer provided on a back surface of the liquid crystal display, the nano suspension layer is disposed between the screen lens and the liquid crystal display, the nano suspension layer comprises an upper plate, a nanomaterial layer and a grounding plate, the upper plate is disposed between the screen lens and the nanomaterial layer and the grounding plate is disposed between the liquid crystal display and the nanomaterial layer; wherein the method comprises: controlling the magnetic layer to provide a static magnetic field perpendicular to the display screen upon receipt of the trigger-off signal; and controlling the upper plate to provide a voltage, or controlling the upper plate to provide a voltage and controlling the magnetic layer to provide a static magnetic field perpendicular to the display screen upon receipt of the trigger-on signal. ### Claim 4 (depends on 3) The method of claim 3, wherein the voltage provided by the upper plate and the static magnetic field provided by the magnetic layer are determined according to one or more of the following: the used nanomaterial, an area of the nanomaterial, a thickness of the nanomaterial, and a switching sensitivity. ### Claim 5 (depends on 1) A terminal comprising: the control device of claim 1. ### Claim 6 (depends on 3) A computer-readable storage medium storing program instructions to implement the method of claim 3 when the program instructions are executed.