# US 9,516,956 B2 · Refrigerator and method for controlling the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,516,956 B2 - Document ID: US9516956B2 - Status: Granted - Kind: B2 - Application number: 14/933,313 - Filed: 2015-11-05 - Published: 2016-02-25 - Granted: 2016-12-13 - Earliest claimed: 2010-02-01 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Eun Joo Lee; Hang Bok Lee - Web page: https://patentgrep.com/patent/US9516956B2 ## CPC - A47F 3/0434: {Glass or transparent panels} - A47F 3/001: {Devices for lighting, humidifying, heating, ventilation} - A47F 3/005: {with glass panels} - A47F 3/043: {Doors, covers (A47F3/0434 takes precedence)} - F25D 11/02: with cooling compartments at different temperatures - F25D 23/02: Doors; Covers (F25D23/08 takes precedence {locks or fastenings E05B65/0042}) - F25D 23/025: {Secondary closures} - F25D 23/028: {Details} - F25D 23/04: with special compartments, e.g. butter conditioners - F25D 23/065: {Details} - F25D 27/00: Lighting arrangements (in general F21) - F25D 27/005: {combined with control means} - F25D 25/025: {Drawers} - F25D 2201/14: using subatmospheric pressure - F25D 2323/021: French doors - F25D 2323/023: Door in door constructions - F25D 2400/18: Aesthetic features - F25D 2400/36: Visual displays - A47F: SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS - F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B) ## Abstract Provided is a refrigerator, which includes a refrigerating compartment, a freezing compartment, and a door assembly. The freezing compartment is adjacent to the refrigerating compartment. The door assembly selectively opens the refrigerating compartment and the freezing compartment. The door assembly includes a glass member defining a frontal exterior thereof and allowing an inside of the refrigerating compartment or the freezing compartment to be seen therethrough when the door assembly is closed, a deposition treated layer formed on a rear surface of the glass member to allow light to partially pass through the glass member, and a transparent plate spaced a predetermined distance from the glass member. Gas for insulation is injected in a space formed between the glass member and the transparent plate, and the space is sealed. ## Claims ### Claim 1 A refrigerator, comprising: a cabinet defining a storage chamber of which a front surface is open, wherein at least one first receiving part is disposed in the storage chamber; a sub door, the sub door including: a frame coupled to a front portion of the cabinet; at least one second receiving part including a receiving basket; and an access opening formed in the frame to enable access to the at least one second receiving part therethrough, an inner side surface of the frame configured to define an edge of the access opening; a main door which is disposed at front portions of the sub door and the cabinet to selectively open or close the access opening, the main door including: an inner door part in contact with the front portion of the sub door; an outer door part defining a front surface of the main door; and a door body coupling the outer door part and the inner door part to each other to establish a vacant space inside the main door; a hinge unit including: a first hinge configured to couple the sub door rotatably to the cabinet; a second hinge configured to couple the main door rotatably to the cabinet or the sub door; a light emitting unit disposed in one of or both the cabinet and the frame of the sub door; a light emitting manipulator configured to input a command for selectively turning on or off the light emitting unit; a control unit configured to turn on or off the light emitting unit according to the command input by the light emitting manipulator; a display unit disposed on the outer door part; and a driving unit disposed in the vacant space at a rear side of the display unit and configured to drive the display unit, wherein when the light emitting unit is turned on according to the command input by the light emitting manipulator, the main door is changed to be transparent such that an inside of the storage chamber is identified by a user, wherein the control unit is configured to turn off the light emitting unit when a duration time reaches a predetermined set time, wherein when the light emitting unit is turned off, the main door is changed to be opaque and the display unit is displayed, wherein the driving unit comprises: an LCD panel; a backlight unit configured to emit light towards the LCD panel; and a power supply configured to supply power to the backlight unit and the LCD panel, wherein the LCD panel comprises: a liquid crystal layer; a first transparent conductor and a second transparent conductor respectively disposed on a front surface and a rear surface of the liquid crystal layer; a first plate and a second plate formed of transparent glass or plastic, the first plate and the second plate respectively disposed on a front surface of the first transparent conductor and a rear surface of the second transparent conductor; and a first polarizing plate and a second polarizing plate respectively disposed on a front surface of the first plate and a rear surface of the second plate, wherein the first transparent conductor and the second transparent conductor are driven as a positive electrode and a negative electrode, respectively, by power supplied from the power supply. ### Claim 2 (depends on 1) The refrigerator of claim 1, wherein the light emitting unit includes: a first light emitting part disposed at an inner surface of the storage chamber to lighten the storage chamber; and a second light emitting part disposed at the inner side surface of the frame to emit light towards. ### Claim 3 (depends on 2) The refrigerator of claim 2, wherein the sub door includes a sub door handle protruding from a front surface of the frame and having a recess part. ### Claim 4 (depends on 3) The refrigerator of claim 3, further comprising a third light emitting part disposed in the recess part of the sub door handle. ### Claim 5 (depends on 3) The refrigerator of claim 3, wherein the outer door part comprises a door handle covering a front surface of the sub door handle such that the sub door handle is not exposed in a state where the main door is in the closed position. ### Claim 6 (depends on 1) The refrigerator of claim 1, further comprising a timer used to count a duration time that the light emitting unit has been on. ### Claim 7 (depends on 1) The refrigerator of claim 1, wherein the inner door part is a transparent plate to allow at least a portion of the light from the light emitting unit to be transmitted therethrough. ### Claim 8 A refrigerator, comprising: a cabinet defining a storage chamber of which a front surface is open, wherein at least one first receiving part is disposed in the storage chamber; a sub door, the sub door comprising: a frame coupled to a front portion of the cabinet; at least one second receiving part including a receiving basket; and an access opening formed in the frame to enable access to the at least one second receiving part therethrough, an inner side surface of the frame configured to define an edge of the access opening; a main door disposed at front portions of the sub door and the cabinet and configured to selectively open or close the access opening, the main door comprising: an inner door part in contact with the front portion of the sub door; an outer door part defining a front surface of the main door; and a door body coupling the outer door part and the inner door part to each other to establish a vacant space inside the main door; a hinge unit comprising: a first hinge configured to couple the sub door rotatably to the cabinet; a second hinge configured to couple the main door rotatably to the cabinet or the sub door; a light emitting unit disposed in one of or both the cabinet and the frame of the sub door; a light emitting manipulator configured to input a command for selectively turning on or off the light emitting unit; a control unit configured to turn on or off the light emitting unit according to the command input by the light emitting manipulator; and a display unit disposed on the outer door part, wherein when the light emitting unit is turned off, the main door is changed to be opaque and the display unit is displayed, wherein when the light emitting unit is turned on according to the command input by the light emitting manipulator, the main door is changed to be transparent such that an inside of the storage chamber is identified by a user, wherein the control unit is configured to turn off the light emitting unit when a duration time reaches a predetermined set time, wherein the inner door part is a transparent plate to allow at least a portion of the light from the light emitting unit to be transmitted therethrough, wherein the outer door part comprises: a transparent plate; a reflective lamination layer on a front surface of the transparent plate; a screening layer formed on an edge portion of a rear surface of the transparent plate; and a viewing window formed in a region of the transparent plate, which is uncovered by the screening layer, wherein the display unit is positioned in a region corresponding to the viewing window. ### Claim 9 (depends on 8) The refrigerator of claim 8, wherein when the light emitting unit is turned off according to the command input by the light emitting manipulator and the main door is oriented in a closed position, the display unit is identified and the viewing window is unidentified by the user. ### Claim 10 (depends on 9) The refrigerator of claim 9, wherein when the light emitting unit is turned on according to the command input by the light emitting manipulator and the main door is oriented in a closed position, the display unit is unidentified and the viewing window is identified by the user, such that the user identifies items in the storage chamber through the viewing window. ### Claim 11 A refrigerator, comprising: a cabinet defining a storage chamber of which a front surface is open, wherein at least one first receiving part is disposed in the storage chamber; a sub door, the sub door including: a frame coupled to a front portion of the cabinet; at least one second receiving part including a receiving basket; and an access opening formed in the frame to enable access to the at least one second receiving part therethrough, an inner side surface of the frame configured to define an edge of the access opening; a main door which is disposed at front portions of the sub door and the cabinet to selectively open or close the access opening, the main door including: an inner door part in contact with the front portion of the sub door; an outer door part defining a front surface of the main door; a display unit disposed on the outer door part to display information including an operation state of the refrigerator; and a door body coupling the outer door part and the inner door part to each other to establish a vacant space inside the main door; a hinge unit including: a first hinge configured to couple the sub door rotatably to the cabinet; a second hinge configured to couple the main door rotatably to the cabinet or the sub door; a light emitting unit disposed in one of or both the cabinet and the frame of the sub door; a viewing conversion input switch configured to input a command for selectively operating the light emitting unit or the display unit; a control unit configured to turn on or off the light emitting unit according to the command input by the viewing conversion input switch; and a driving unit disposed in the vacant space at a rear side of the display unit and configured to drive the display unit, wherein when the light emitting unit is turned on by the control unit, the main door is changed to be transparent such that the display unit is invisible, wherein the driving unit comprises: an LCD panel; a backlight unit configured to emit light towards the LCD panel; and a power supply configured to supply power to the backlight unit and the LCD panel, wherein the LCD panel comprises: a liquid crystal layer; a first transparent conductor and a second transparent conductor respectively disposed on a front surface and a rear surface of the liquid crystal layer; a first plate and a second plate formed of transparent glass or plastic, the first plate and the second plate respectively disposed on a front surface of the first transparent conductor and a rear surface of the second transparent conductor; and a first polarizing plate and a second polarizing plate respectively disposed on a front surface of the first plate and a rear surface of the second plate. ### Claim 12 (depends on 11) The refrigerator of claim 11, wherein when the light emitting unit is turned off by the control unit, the main door is changed to be opaque such that the display unit returns to be visible through the outer door part. ### Claim 13 (depends on 11) The refrigerator of claim 11, wherein the first and second transparent conductors are driven as positive and negative electrodes by power supplied from the power supply.