KR20110008931A - Refrigerator and control process of the same - Google Patents

Abstract

PURPOSE: A refrigerator having a door equipped with a display and an operation method thereof are provided to prevent the manipulation of the refrigerator by an infant by activating an operation mode or a play mode of the display according to the human body sensing result. CONSTITUTION: A refrigerator comprises a main body(2) having a storage room, doors(4,6,8,10), a display(12), a presence sensor, and a controller. The doors open and close the storage room. The display is installed in the doors and has an operation mode and a play mode. The presence sensor senses human body. The controller sets the display to the operation mode or the play mode according to the sensing result of the presence sensor. The controller sets the operation mode if the presence sensor senses a human body whose height is equal to or greater than the predetermined height and the play mode if the presence sensor senses a human body whose height is less than the predetermined height.

Description

Refrigerator and its operation method {Refrigerator and Control process of the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator and a driving method thereof, and more particularly to a refrigerator provided with a display in a door and a driving method thereof.

In general, a refrigerator is a device that cools a storage compartment such as a refrigerating compartment and a freezing compartment by using a refrigeration cycle device including a compressor, a condenser, an expansion mechanism, and an evaporator.

Recently, the display of the operation information of the refrigerator and the operation unit for adjusting the temperature of the refrigerator have been installed in the door of the refrigerator, and the user can check the current operating state or the set temperature of the refrigerator through the display information on the display. It is possible to change the set temperature of the refrigerator and the like through the operation unit.

However, the refrigerator according to the related art has a problem that the infant may change the set temperature of the refrigerator or the like through the operation unit or turn off the refrigerator, and thus the refrigerator may be misused, and the refrigerator merely serves to keep food cold.

The present invention has been made to solve the problems of the prior art, the object of the present invention is to provide a refrigerator that can be conveniently used by both adults and infants according to the detection of the human body.

Another object of the present invention is to provide a method of operating a refrigerator which determines and displays a mode of a display according to height of a human body when a human body approaches.

The refrigerator according to the present invention for solving the above problems is a main body having a storage compartment; A door that opens and closes the storage compartment; A display mounted to the door, the display having an operation mode and a play mode; A human body detecting sensor detecting a human body; And a controller configured to control the display to an operation mode or a play mode according to a detection result of the human body sensor.

The controller controls the display to an operation mode when a human body greater than or equal to a set height is detected by the human body sensor, and controls the display to a play mode when a human body less than a predetermined height is detected by the human body sensor.

The human body sensor is installed in plural with a height difference.

The controller controls the display to an operation mode when both the human body detecting sensors located above and below the plurality of human body detecting sensors detect a human body, and the human body detecting sensor located above the plurality of human body detecting sensors If the human body sensor located below the body does not detect the human body, the display controls the play mode.

If the human body is not detected by the human body sensor, the controller turns off the display.

The door includes at least one rotary door that opens and closes a portion of the storage compartment, and at least one drawer door that opens and closes the rest of the storage compartment and has an accommodation space, and the display is installed in the drawer door.

The display is the same size or larger than the front of the drawer door.

A refrigerator according to the present invention includes a main body having a storage compartment; A door that opens and closes the storage compartment; A plurality of displays installed on the doors to have a height difference; A human body detecting sensor detecting a human body; When a human body having a set height or more is detected by the human body detecting sensor, the display positioned on the upper part of the plurality of displays is turned on. It includes a control unit to turn on.

The upper display is a display having an operation mode, and the lower display is a display having a play mode.

The plurality of human body detection sensors are installed to have a height difference.

If the human body is not detected by the human body sensor, the controller turns off the plurality of displays.

A method of operating a refrigerator according to the present invention includes a human body detecting step of detecting a human body by a human body sensor installed in the refrigerator; And a display control step of controlling the display installed in the refrigerator in one of an operation mode and a play mode according to the detection of the human body.

The detecting of the human body detects the height of the human body according to the number and position of the human detecting sensor detecting the human body among the plurality of human detecting sensors detecting the human body.

The display control step controls the display in the operation mode when the height of the human body is greater than or equal to the set height, and controls the display to the play mode when the height of the human body is less than the set height.

The operation method of the refrigerator includes a display off step of turning off the display when the human body is not detected in the human body detecting step.

According to the present invention configured as described above, since the display is controlled in one of the operation mode and the play mode according to the detection result of the human body sensor, the operation of the refrigerator by the infant can be prevented in advance, and the infant learns through the display. And because it can play, there is an advantage to increase the utilization of the refrigerator.

In addition, the plurality of human body sensor is installed with a height difference, it is easy to detect the adult and infant, there is an advantage of minimizing the possibility of misidentifying the adult and infant.

In addition, there is an advantage that the display is turned off while the human body is not detected to minimize the power consumption consumed in the display.

In addition, since the display is installed in the drawer door, the drawer door can be taken out and serviced without the need to disassemble the entire door of the refrigerator during the service of the display, thereby increasing the service convenience of the display.

In addition, since the size of the display is the same as the size of the drawer door or larger than the size of the drawer door, more information is displayed through the front of the refrigerator, and more various types of commands can be easily entered while minimizing the screen change of the display. There is an advantage to this.

In addition, when the adult approaches the upper display of the plurality of displays on, when the infant approaches the lower display of the plurality of displays, there is an advantage that can provide the optimal information for each user.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of one embodiment of a refrigerator according to the present invention, and FIG. 2 is a perspective view when one of the doors shown in FIG. 1 is pulled forward.

The refrigerator according to the present embodiment includes a main body 2 having storage rooms R1, R2, and R3, and doors 4, 6, 8, and 10 that open and close the storage rooms R1, R2, and R3. And a display 12 provided in the doors 4, 6, 8 and 10.

The main body 2 forms the exterior of a refrigerator, and a plurality of storage chambers R1, R2, and R3 are partitioned and formed like a freezer compartment, a refrigerator compartment, and a vegetable compartment.

As for the main body 2, a machine room is partitioned with storage rooms R1 (R2) and R3, and the compressor (not shown) which compresses a refrigerant | coolant is installed in a machine room.

The main body 2 includes a condenser for condensing the refrigerant compressed by the compressor, an expansion mechanism for expanding the refrigerant condensed in the condenser, and cooling the storage chambers R1, R2, and R3 while the refrigerant expanded in the expansion mechanism is evaporated. Evaporator is installed.

A plurality of doors 4, 6, 8, and 10 are installed to open and close the storage chambers R1, R2, and R3.

The doors 4, 6, 8 and 10 include at least one rotating door 4, 6 and 8 which open and close part R1 and R2 of the storage compartments R1, R2 and R3, It includes at least one drawer door 10 that opens and closes the remaining R3 of the storage compartments R1, R2, and R3 and has an accommodation space S.

The drawer door 10 opens and closes the front and rear of the storage compartment R3 while entering and exiting the storage compartment R3, and when the drawer is inserted into the storage compartment R3 while the storage is accommodated in the accommodation space S, the storage compartment R3. The cold air inside allows the storage to be frozen or refrigerated.

The display 12 is capable of displaying various information as well as inputting various commands. Preferably, the display 12 includes a touch LCD panel that allows a user to input various commands while viewing the displayed information.

The display 12 may have only an operation mode, may have an operation mode and a play mode, and the present embodiment will be described as having an operation mode and a play mode.

Here, the operation mode is a mode for inputting a command related to food cooling of the refrigerator and displaying information according to the on / off of the refrigerator, temperature control of the storage compartment, operation mode selection, and the like, and the play mode is food information and storage of the stored product. It is a mode to input commands related to recipes of water, schedule management, notes, albums, MP3 play, education, and entertainment, and display information accordingly.

The display 12 selects and controls one mode of the operation mode and the play mode by a controller (not shown), which will be described later. The selective control will be described later in detail.

3 is a cross-sectional view taken along the line A-A shown in FIG.

As shown in FIG. 2, the drawer door 10 includes a box body 16 having a storage chamber S and entering and exiting the storage chamber R3, and a drawer door 10 disposed in front of the box body 16. And a front plate 18 forming the front side of 10).

The display 12 is mounted between the drawer door main body 16 and the transparent member 18 as a hooking member such as a screw or a fastening member such as a screw.

The display 12 is easy to service and installed in the drawer door 10, and is formed to be the same size or larger than the front of the drawer door 10 for input of more commands or display of more information.

The display 12 includes a display case 20 disposed in front of the front plate 18 forming the front of the drawer door 10, a transparent member 22 disposed in front of the display case, and a display case ( 20 LCD 24 installed in the LCD, an LCD module 26 installed in the LCD 24 to display information, and a touch screen disposed between the LCD module 26 and the transparent member 22. And a coordinate recognition unit 30 for recognizing input coordinates of the touch screen 28.

The display 12 is a display case 20 drawer is installed on the front plate 18 of the door 10 as a fastening member such as a screw or a hook such as a hook, the transparent member 22 and the display case 20 It is also possible to be coupled by the display cover 32, it is also possible that the transparent member 22, the display case 20 and the front plate 18 of the drawer door 10 is coupled by the display cover 32. .

The display cover 32 fixes the transparent member 22 to the display case 20 or the front plate 18 of the drawer door 10 while surrounding the edges of the transparent member 22 and the display case 20. The front surface of the transparent member 22 is hooked to the front bent portion bent at the front end of the display cover 32, and the rear of the display case 20 or the rear face of the front plate 18 of the drawer door 10 is the display cover ( It is caught by the rear end bent portion bent at the rear end 32, and the transparent member 22 is integrated with the display case 32.

On the other hand, the operation mode and the play mode are selectively controlled in the display 12, and the selection may be selected according to the user's manipulation of the display 12, or may be automatically selected according to the user.

4 is a control block diagram of an embodiment of a refrigerator according to the present invention.

As shown in FIG. 4, the refrigerator according to the present embodiment includes a human body detecting sensor 40 and 42 for detecting a human body; The controller 50 may further include a control unit 50 for controlling the display 12 to an operation mode or a play mode according to the detection result of the human body sensor 40 or 42.

The controller 50 controls the display 12 to an operation mode when a human body having a set height or more is detected by the human body detecting sensors 40 and 42, and the human body having a body less than the set height is detected by the human body sensor 40 and 42. If detected, the display 12 is controlled in the play mode.

That is, the refrigerator according to the present invention is set to the front of the door (4), (6), (8) and (10) above the height of the human body, that is, when the adult approaches, the display 12 to allow the adult to operate the refrigerator through the display 12 Control to the operation mode, and set to the front of the door (4) (6) (8) (10), when the human body under the height, i.e., the infant, approaches the display to prevent the infant from operating the refrigerator through the display (12). While controlling the 12 to a mode other than the operation mode, the display 12 is controlled to the play mode so that the infant can learn or play through the display 12.

The human body detecting sensors 40 and 42 may also detect the presence or absence of a human body and a human body by one human body sensor, and may also detect the presence or absence of a human body and the human body by a plurality of human body sensors.

The human body detecting sensor 40 or 42 may be made of an infrared sensor which detects the presence of the human body and the height of the human body by irradiating infrared rays to the periphery of the refrigerator, particularly the front area of the doors 4, 6, 8 and 10. It is also possible to include an image sensor that senses the presence or absence of a human body and the height of the human body by capturing an image of the periphery of the refrigerator, particularly the front area of the doors 4, 6, 8, 10.

The human body detecting sensors 40 and 42 may be made of an infrared sensor to increase the accuracy of detecting the height of the human body and to easily distinguish between an adult and an infant. In particular, the plurality of infrared rays may be spaced apart from each other by a height difference. It is most preferably made of a sensor, and a plurality of human body sensors, in particular, the upper position sensor 42 and the lower position sensor 42 is described as having a height difference.

The upper position sensor 40 and the lower position sensor 42 may be installed in the main body 2, may be installed in the doors 4, 6, 8, 10, and the following door ( It describes as being installed in 4) (6) (8) 10.

The upper position sensor 40 is installed so as to be positioned above the center of the front of the refrigerator among the doors 4, 6, 8, and 10, and the lower position sensor 42 is installed in the door 4 ( 6) (8) It is installed to be located above the center of the front of the refrigerator among the (10).

The upper position sensor 40 is installed in the door 4, 6 located above the door 10 in which the display 12 is installed, and the lower position sensor 42 is installed in the door 10 in which the display 12 is installed. It is possible to be installed in the door (8) that is installed in the door (4) (6) located on the lower side, the upper position sensor 40 and the lower position sensor 42

Of course, it is also possible to be installed together with the door 10 in which the display 12 is installed.

The controller 50 indicates that the current adult has approached the display 12 when both the human body detecting sensors 40 and 42 located at the upper and lower sides of the plurality of human body detecting sensors 40 and 42 detect the human body. By judging, the display 12 is controlled in an operation mode, and the human body detecting sensor 40 located on the upper side of the plurality of human body detecting sensors 40 and 42 does not detect the human body, and the human body detecting sensor located on the lower side ( When 42 detects the human body, it is determined that the infant is approaching the display 12 and the display 12 is controlled in the play mode.

 If the human body is not detected by the human body sensors 40 and 42 so as to minimize the power consumption consumed by the display 12, the controller 50 may turn off the display 12.

On the other hand, in the above operation method of the refrigerator, when the off (stop) of the refrigerator is input through the display 12, the display 12 is turned off. (S6) (S7)

5 is a flowchart illustrating an embodiment of a method of operating a refrigerator according to the present invention.

The operating method of the refrigerator according to the present embodiment largely includes a human body detecting step (S1) (S2), a display control step (S3) (S4), and a display off step (S5).

Human body detecting step (S1) (S2) is a step in which the human body sensor 40, 42 detects the human body, the human body sensor 40 (detecting the human body of the plurality of human body sensor 40, 42 ( 42) The height of the human body is detected according to the number and its position.

The controller 50 detects a human body from the lower human body sensor 40 among the plurality of human body sensors 40 and 42, and detects a human body from the upper human body sensor 42. (6) (8) (10) Determining that an adult having a set height or more has approached the front, and the human body is detected by the lower human body sensor 40 of the plurality of human body sensors 40 and 42, and the upper human body. If the human body is not detected by the detection sensor 42, it is determined that an infant of less than the set height approaches the front of the door 4, 6, 8 and 10 at present.

The display control step (S3) (S4) is a step of controlling the display 12 installed in the refrigerator in one of the operation mode and the play mode according to the detection and determination of the human body, performed in the human body detection step (S1) (S2) The display 12 is controlled according to the detection of the human body.

The controller 50 controls the display 12 to the operation mode when an adult having a set height or more is detected (S3).

The display 12 displays at least one of the on / off of the refrigerator, the temperature control of the storage compartment, and the operation mode selection in the LCD module 26 in the operation mode, and the front of the information displayed on the LCD module 26 by the user. When is touched, the touch screen 28 and the coordinate recognition unit 30 detect the position of the part touched by the user and output it to the controller 50, and the controller 50 checks the user's input and responds to the user's input. Accordingly, the compressor 52 and the display 12 are controlled.

On the other hand, if the infant less than the set height is detected, the controller 50 controls the display 12 to the play mode (S3).

The display 12 is not related to the direct operation of the refrigerator such as memo, album, MP3 play, education, entertainment, etc. in the LCD module 26 in the operation mode, but is used for memo, album, MP3 play, education, entertainment, etc. When at least one information is displayed and the user touches the front of the information displayed on the LCD module 26, the touch screen 28 and the coordinate recognition unit 30 detect the position of the portion touched by the user and control the controller ( 50), the controller 50 checks the user's input and controls the display 12 according to the user's input. At this time, the controller 50 does not vary the operation of the compressor 52 according to the input of the display 12, but drives the compressor 52 according to the operation before the play mode.

   The display off step S5 is a step of turning off the display 12 when the human body is not detected in the human body detecting step S1 and S2. The controller 50 controls all of the plurality of human body detecting sensors 40 and 42. If the human body is not detected, it is determined that the human body is not detected in front of the current doors 4, 6, 8, and 10, and the display 12 is kept off to reduce power consumption.

The display off step (S5) can also be performed while the display 12 is off, and can be performed even when the current display 12 is in one of the operation mode and the play mode.

That is, an adult operates the display 12 according to the operation mode of the display 12 and then moves outside the front of the doors 4, 6, 8 and 10, or the infant enters the play mode of the display 12. Accordingly, when the display 12 is operated and moved outside the front of the doors 4, 6, 8 and 10, the display 12 is no longer required to be turned on, so that the display 12 is turned off.

6 is a perspective view when the display installed on the top of the plurality of displays of the refrigerator according to another embodiment of the present invention is turned on, and FIG. 7 is a perspective view when the display installed on the bottom of the plurality of displays of the refrigerator another embodiment according to the present invention is turned on 8 is a control block diagram of another embodiment of a refrigerator according to the present invention.

In the refrigerator according to the present embodiment, a plurality of displays 12A and 12B are installed to have a height difference in the doors 4, 6, 8, and 10, and the human body sensors 40 and 42 are human body. Le is installed to detect, and when the human body over the set height is detected by the human body sensor 40, 42, the controller 50 turns on the display 12A located on the upper part of the plurality of displays 12A, 12B, When a human body less than the set height is detected by the human body detecting sensors 40 and 42, the controller 50 turns on the display 12B positioned below the plurality of displays 12A and 12B. 12A) 12B and other configurations and actions other than the control of the controller 50 are the same or similar to those of the embodiment of the present invention, and thus detailed description thereof will be omitted.

The plurality of displays 12A and 12B include a display 12A (hereinafter referred to as an upper display) positioned at the top of the refrigerator, and a display 12B (hereinafter referred to as lower display) positioned below the refrigerator, and an upper display. 12A and lower display 12B each have a structure that is the same as or similar to that of the display of one embodiment of the present invention.

The upper display 12A is installed in one of the rotatable doors 4 and 6 and the drawer door 10, and the lower display 12B is the other of the rotatable doors 4 and 6 and the drawer door 10. It is installed in one (10).

The upper display 12A is installed in the higher doors 4 and 6 of the doors 4, 6, 8 and 10, and the lower display 12B is the door 4 in which the upper display 12A is installed. (6) is installed in the door 10 is lower than the height, in consideration of the height of the infant, the lower display 12B is preferably installed in the door 10 located approximately in the center of the plurality of doors, The upper display 12 is most preferably installed in the doors 4 and 6 that are higher than the door 10 in which the lower display 12B is installed.

Here, the plurality of displays 12A and 12B may each have an operation mode and a play mode together, one of which may have an operation mode, and the other may have a play mode.

In the plurality of displays 12A and 12B, an adult having a set height or more mainly performs an operation mode, and an infant under a set height mainly performs a play mode, so that the upper display 12A preferably displays / inputs an operation mode. The lower display 12 preferably displays / inputs the play mode.

Here, the plurality of displays 12A and 12B may allow an adult to implement a play mode for food information of a stored product, a recipe for a stored product, schedule management, a memo, an album, an MP3 play, education, and entertainment, and the infant may operate the operation mode. Since it is necessary not to implement, it is preferable that the upper display 12A selectively displays / enter the operation mode and the play mode, and the lower display 12B only displays / enter the play mode, for convenience of description below. The controller 50 controls the upper display 12A when the upper display 12A is on in the operation mode, and controls the lower display 12B when the lower display 12B is on in the play mode.

  Meanwhile, the controller 50 turns off the plurality of displays 12A and 12B when the human body is not detected by the human body sensors 40 and 42 as in the exemplary embodiment of the present invention.

9 is a flowchart illustrating another embodiment of a method for operating a refrigerator according to the present invention.

The operating method of the refrigerator according to the present embodiment includes a human body detecting step S1 (S2), a display control step S3 '(S4') and a display off step (S5 '), and a human body detecting step (S1). (S2) is the same as or similar to the operation method of the refrigerator of an embodiment of the present invention, and a detailed description thereof will be omitted.

 The display control step S3 ′ (S4 ′) is a step of selectively turning on the plurality of displays 12A and 12B according to the detection and determination of the human body, and the display control step S3 ′ (S4 ′). Upon detection, one of the upper display 12A and the lower display 12B located above is selectively turned on and controlled.

The controller 50 turns on the upper display 12A when an adult having a set height or more is detected. (S3 ')

The on-time controller 50 of the upper display 12A displays information related to the operation of the refrigerator, such as on / off of the refrigerator, temperature control of a storage compartment, selection of an operation mode, etc. in the LCD module 26 of the upper display 12A, When the user touches the front of the information displayed on the LCD module 26, the touch screen 28 and the coordinate recognition unit 30 detect the position of the portion touched by the user and output the detected position to the controller 50, and the controller ( 50 confirms the user's input and controls the compressor 52 and the upper display 12A according to the user's input.

On the other hand, the controller 50 turns on the lower display 12 when an infant less than the set height is detected (S4).

The on-time controller 50 of the lower display 12A may display information necessary for the play of the infant although the LCD module 26 has no direct manipulation of the refrigerator such as memo, album, MP3 play, education, entertainment, etc. When the front of the information displayed on the LCD module 26 is touched, the touch screen 28 and the coordinate recognition unit 30 detect the position of the part touched by the user and output the detected portion to the controller 50, and the controller 50. The controller verifies the user's input and controls the lower display 12B according to the user's input. At this time, the controller 50 does not vary the operation of the compressor 52 according to the input of the lower display 12B, but drives the compressor 52 according to the operation before the play mode.

   The display off step S5 ′ is a step of turning off both the upper display 12A and the lower display 12B when the human body is not detected in the human body detecting step S1 and S2, and the controller 50 controls the plurality of human bodies. If the human body is not detected by both of the sensors 40 and 42, it is determined that the human body is not detected in front of the doors 4, 6, 8, and 10, and thus, a plurality of sensors may be used to reduce power consumption. All of the human body sensors 40 and 42 are kept off.

The display off step (S5 ′) may be performed while all of the plurality of human body sensors 40 and 42 are turned off, and may be performed even when any one of the plurality of displays 12A and 12B is currently on. Do.

That is, the adult operates the upper display 12A according to the operation mode of the upper display 12A and moves outside the front of the doors 4, 6, 8 and 10, or the infant moves the lower display 12B. If you operate the lower display 12B according to the play mode and move outside the front of the doors 4, 6, 8 and 10, it is no longer necessary to turn on the plurality of displays 12A and 12B. Turn off the display that was on.

1 is a perspective view of one embodiment of a refrigerator according to the present invention;

FIG. 2 is a perspective view when one of the doors shown in FIG. 1 is pulled forward; FIG.

3 is a cross-sectional view taken along the line A-A shown in FIG.

4 is a control block diagram of an embodiment of a refrigerator according to the present invention;

5 is a flow chart of an embodiment of a method of operating a refrigerator according to the present invention;

6 is a perspective view when a display installed on an upper portion of a plurality of displays of another embodiment of the refrigerator according to the present invention is turned on;

7 is a perspective view when a display installed in a lower portion of a plurality of displays of another embodiment of the refrigerator according to the present invention is turned on;

8 is a control block diagram of another embodiment of the refrigerator according to the present invention;

9 is a flowchart illustrating another embodiment of a method for operating a refrigerator according to the present invention.

Claims (15)

A main body having a storage compartment; A door that opens and closes the storage compartment; A display mounted to the door, the display having an operation mode and a play mode; A human body detecting sensor detecting a human body; And a controller configured to control the display to an operation mode or a play mode according to a detection result of the human body sensor. The method of claim 1, The controller controls the display to an operation mode when a human body having a set height or more is detected by the human body sensor. The refrigerator controls the display in a play mode when a human body less than a predetermined height is detected by the human body sensor. The method of claim 1, The human body sensor has a plurality of refrigerators having a height difference. The method of claim 1, The control unit controls the display to an operation mode when both the human detection sensors located above and below the human body detection sensors detect a human body. A refrigerator controlling the display in a play mode when the human body sensor located above the human body sensor does not detect the human body and the human body sensor located below the body detects the human body. The method of claim 1, The control unit turns off the display if the human body is not detected by the human body sensor. The method of claim 1, The door includes at least one rotary door that opens and closes a portion of the storage compartment, and at least one drawer door that opens and closes the rest of the storage compartment and has an accommodation space. The display is a refrigerator installed in the drawer door. The method of claim 6, And the display is the same size or larger than the front of the drawer door. A main body having a storage compartment; A door that opens and closes the storage compartment; A plurality of displays installed on the doors to have a height difference; A human body detecting sensor detecting a human body; When a human body having a set height or more is detected by the human body detecting sensor, the display positioned on the upper part of the plurality of displays is turned on. Refrigerator comprising a control unit to turn on. The method of claim 8, The display located above is a display having an operation mode, And the display located below is a display having a play mode. The method of claim 8, The human body sensor is a refrigerator installed to have a plurality of height difference. The method of claim 8, The controller may be configured to turn off the plurality of displays when the human body is not detected by the human body sensor. A human body detecting step of detecting a human body by a human body sensor installed in the refrigerator; And a display control step of controlling a display installed in the refrigerator in one of an operation mode and a play mode according to the detection of the human body. 13. The method of claim 12, The detecting of the human body may include: a method of operating a refrigerator that detects height of a human body according to the number and position of a human body detecting sensor detecting a human body among a plurality of human body detecting sensors detecting a human body. 13. The method of claim 12, The display control step may include controlling the display to the operation mode when the height of the human body is greater than or equal to a set height, and controlling the display to the play mode when the height of the human body is less than a predetermined height. 13. The method of claim 12, The operation method of the refrigerator includes a display off step of turning off the display when the human body is not detected in the detecting of the human body.

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