Refrigerator and method for controlling the same

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.

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.