Display device and household appliance including same

Abstract

In a home appliance including a display device that projects an image that displays status information of the home appliance, the display device is provided so as to be disposed behind a front panel of the home appliance and project the image downward from the home appliance, and includes: an image forming unit that forms an image on the front panel of the home appliance; comprising a light source, a display device that transmits light generated from the light source and forms an image, and an illumination lens that focuses the light generated from the light source to the display device; an adjusting section including a refractive lens configured to adjust a size of an image projected from the display device; and a housing that houses the image forming unit and the adjustment unit, the adjustment unit being provided so as to be relatively movable with respect to the image forming unit.

Description

Technical Field

[0001] The present disclosure relates to a device for displaying a display image by means of a beam projector and a household appliance comprising the device. Background Art

[0002] Household appliances refer to equipment that is mainly installed in the user's home to help the user with housework, including refrigerators, air conditioners, air purifiers, vacuum cleaners, cooking equipment, dishwashers, clothing care machines, washing machines, etc.

[0003] The home appliance may include a display device configured for a user to confirm a driving state of the home appliance.

[0004] The display device can display a display screen through a display unit provided in the home appliance, or can display a display screen by projecting light to an outer area of ​​the home appliance through a beam projector function (image projection function). Summary of the invention

[0005] Technical issues

[0006] One aspect of the present disclosure discloses a display device and a home appliance including the display device. In the display device for projecting an image, an image forming unit for providing light and forming an image and an adjusting unit for adjusting the size of the image generated by the image forming unit to be projected are modularized in a single manner.

[0007] The technical problems to be achieved in this article are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by people with ordinary knowledge in the technical field to which the present invention belongs through the following records.

[0008] Technical Solution

[0009] In a household appliance including a front panel according to the concept of the present disclosure and a display device arranged behind the front panel, the display device includes: an image forming part, including a light source, a display device and an illumination lens, the display device is configured to transmit light generated from the light source to display an image and project the image to the bottom of the household appliance, and the illumination lens focuses the light generated from the light source; an adjustment part, including a refractive lens configured to adjust the size of the image projected from the image forming part, and configured to be able to move relative to the image forming part; and a housing, which accommodates the image forming part and the adjustment part.

[0010] Beneficial Effects

[0011] An aspect of the present disclosure may minimize the size of a module composed of an image forming part and an adjusting part. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a diagram illustrating a system kitchen in which a dishwasher according to an embodiment is provided in a built-in manner.

[0013] Figure 2 FIG. 1 is a perspective view of a dishwasher in a state where a door is opened according to an embodiment.

[0014] Figure 3 is a schematic cross-sectional view of a dishwasher according to an embodiment.

[0015] Figure 4 is a control block diagram of a dishwasher according to an embodiment.

[0016] Figure 5 is a conceptual diagram of a display device according to an embodiment.

[0017] Figure 6 is a perspective view of a display device according to an embodiment.

[0018] Figure 7 is a perspective view of a display device according to an embodiment.

[0019] Figure 8 is a cross-sectional view of a display device according to an embodiment.

[0020] Fig. 9 is an exploded perspective view of a housing of a display device according to an embodiment.

[0021] Fig.10 is an exploded perspective view of a second housing of a display device according to an embodiment. DETAILED DESCRIPTION

[0022] The various embodiments of this document and the terms used therein are not intended to limit the technical features described herein to specific embodiments, and should be understood to include various modifications, equivalents, or substitutes of the corresponding embodiments.

[0023] Regarding the description of the drawings, like reference numerals may be used for like or related components.

[0024] Unless the context clearly dictates otherwise, a singular form of a noun corresponding to an item may include one or more of the item.

[0025] In this document, each of the statements such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C" and "at least one of A, B or C" may include any one or all possible combinations of the items listed together in the corresponding statement in its statement.

[0026] The term "and / or" includes a combination of a plurality of related stated elements or a certain element among a plurality of related stated elements.

[0027] Terms such as “1st”, “2nd” or “first” or “second” may be used to simply distinguish a corresponding constituent element from another corresponding constituent element, and do not limit the corresponding constituent elements in other aspects (for example, importance or order).

[0028] When a certain (for example, a first) component is referred to as being “coupled” or “connected” to another (for example, a second) component, either together with the term “functionally” or “communicatively” or without these terms, this indicates that the certain component may be connected to the other component directly (for example, by wire), wirelessly, or through a third component.

[0029] The terms "including" or "having" are used to specify the existence of the features, numbers, steps, operations, constituent elements, parts or their combinations recorded in this document, and do not preclude the existence or additional possibilities of one or more other features or numbers, steps, operations, constituent elements, parts or their combinations.

[0030] When it is mentioned that a certain element is “connected,” “coupled,” “supported,” or “contacted” with another element, this includes not only the case where the elements are directly connected, coupled, supported, or contacted, but also the case where they are indirectly connected, coupled, supported, or contacted via a third element.

[0031] When a component is referred to as being “on” another component, this includes not only a case where the component is in contact with the other component but also a case where another component is present between the two components.

[0032] Hereinafter, embodiments according to the present invention are described in detail with reference to the accompanying drawings.

[0033] In the description of the present invention, the dishwasher 1 is taken as an example of a home appliance, but the present invention can also be applied to various home appliances such as a washing machine, a refrigerator, an oven, a microwave oven, and an air conditioner.

[0034] In addition, the terms "upward and downward direction", "lower side" and "front and rear direction" used in the following description are based on Figure 1 The shape and position of each component are not limited to this term.

[0035] Figure 1 is a diagram showing a system kitchen in which a dishwasher according to an embodiment is provided in a built-in manner, Figure 2is a perspective view of a dishwasher with its door opened according to an embodiment, Figure 3 is a schematic cross-sectional view of a dishwasher according to an embodiment.

[0036] Reference Figures 1 to 3 As an example, a system kitchen may include a cabinet S having a storage space R. The cabinet S may include a counter configured in a flat plate shape and capable of cooking, and a sink configured to be capable of washing dishes or processing food materials.

[0037] The storage space R may be divided by internal partitions or the like, and the divided storage space R may be opened and closed by various panels P forming the front surface of the box body S. As shown in FIG.

[0038] The system kitchen may be equipped with home appliances that are provided in the system kitchen in a built-in manner.

[0039] As an example, the dishwasher 1 may be installed in a system kitchen in a built-in manner. The dishwasher 1 may be installed in a part of the divided storage space R, and the storage space R where the dishwasher 1 is installed may be opened and closed by a front panel 90 arranged in front of the dishwasher 1 among various panels P.

[0040] As an example, other types of home appliances such as an oven and a microwave oven may be stored in the storage space R in addition to the dishwasher 1 .

[0041] As an example, the dishwasher 1 may be arranged in a storage space inside an art wall formed in an interior space other than a system kitchen, and configured to open and close the storage space storing the dishwasher 1 by a panel forming the art wall.

[0042] As an example, the storage space formed inside the art wall may store other types of home appliances such as an air conditioner, a washing machine, a dryer, an oven, and a microwave oven in addition to the dishwasher 1 .

[0043] As an example, the dishwasher 1 may be arranged in an inner space formed inside a storage cabinet of furniture or the like other than a system kitchen or an art wall, and configured to open and close the storage space of the dishwasher 1 by a door of the storage cabinet.

[0044] As an example, the storage space formed inside the storage cabinet may store other types of home appliances such as an air conditioner, a washing machine, a dryer, an oven, and a microwave oven in addition to the dishwasher 1 .

[0045] However, hereinafter, the dishwasher 1 housed in the system kitchen is described as an example, and the features described later may be applied to home appliances housed in the above-mentioned various forms.

[0046] The dishwasher 1 may include a tub 12 provided inside the main body 10. The tub 12 may be provided in a substantially box shape. One side of the tub 12 may be open. The tub 12 may include an opening 12a. As an example, the tub 12 may be opened toward a first direction X as the front.

[0047] The dishwasher 1 may further include a door 20 configured to open and close the opening 12a of the tub 12. The door 20 may be provided to the main body 10 in a manner to open and close the opening 12a of the tub 12. The door 20 may be rotatably provided to the main body 10 by means of a hinge 25 or the like. The door 20 may be installed in a manner detachable from the main body 10.

[0048] As an example, the door 20 may be rotatably hinged to the lower portion of the body 10. The rotation axis of the hinge 25 may be configured to extend in the second direction Y as the left-right direction of the body 10 so that the door 20 rotates from the front of the body 10 toward the front-rear direction.

[0049] As an example, the door 20 may be hinged with a hinge provided on the left or right side of the main body 10 along the second direction Y on the front side of the main body 10. The door 20 may be provided to rotate from the second direction Y to the first direction X by means of the hinge provided on the left and / or right side of the main body 10.

[0050] The door 20 may include an outer surface 22 forming the outer side of the door 20 and combined with the front panel 90 , and an inner surface 21 facing the inside of the tub 12 when the door 20 closes the tub 12 .

[0051] The dishwasher 1 may further include a storage container provided inside the tub 12 to store tableware. The storage container may include a plurality of baskets 51, 52, 53.

[0052] The storage container may include a middle basket 52 located in the middle in the height direction of the dishwasher 1 and a lower basket 51 located at the lower part in the height direction of the dishwasher 1. The middle basket 52 may be configured to be supported by the middle guide rack 13b. The lower basket 51 may be configured to be supported by the lower guide rack 13a. The middle guide rack 13b and the lower guide rack 13a may be provided on the side surface 12d of the tub 12 in a manner that they can slide toward the opening 12a of the tub 12. The side surface 12d of the tub 12 may be a concept including the inner surface of the right side wall and the inner surface of the left side wall of the tub 12.

[0053] The lower basket 51 and the middle basket 52 can store relatively large tableware. However, the types of tableware stored in the lower basket 51 and the middle basket 52 are not limited to relatively large tableware. That is, the plurality of baskets 51, 52, 53 can store not only relatively large tableware but also relatively small tableware.

[0054] The storage container may include an upper basket 53 located at the upper part in the height direction of the dishwasher 1. The upper basket 53 may be formed in the form of a rack assembly to store relatively small tableware. As an example, cooking tools such as spoons, knives, spatulas, etc. and even cutlery may be stored in the upper basket 53, and small cups such as espresso cups may also be stored in the rack assembly. However, the types of tableware stored in the upper basket 53 are not limited to the examples.

[0055] The upper basket 53 may be configured to be supported by the upper guide frame 13c. The upper guide frame 13c may be provided at the side surface 12d of the tub 12. As an example, the upper basket 53 may be able to slide by the upper guide frame 13c and may be introduced into or led out of the washing chamber C.

[0056] Storage containers are not limited to Figure 2 and Figure 3 The shape shown may not include the upper basket 53 according to the size of the tub 12. As an example, the storage container may also be realized by only the middle basket 52 and the lower basket 51.

[0057] The dishwasher 1 may include a washing chamber C as a space formed inside the tub 12. The washing chamber C may be defined as an inner space of the tub 12. The washing chamber C may be formed as a space surrounded by a lower surface 12b, an upper surface 12c, a side surface 12d of the tub 12, and an inner surface 21 of a door when the door 20 closes the tub 12.

[0058] The washing chamber C may refer to a space in which dishes placed in the baskets 51 , 52 , and 53 may be washed and dried by washing water.

[0059] The dishwasher 1 may include a spray device 40 configured to spray wash water. The spray device 40 may receive wash water from the sump assembly 70.

[0060] The spraying device 40 may include a plurality of spraying units 41 , 42 , 43 .

[0061] As an example, the plurality of spray units 41, 42, 43 may include: a first spray unit 41, arranged at a lower portion of the lower basket 51 in the height direction of the dishwasher 1; a second spray unit 42, arranged at a lower portion of the middle basket 52 in the height direction of the dishwasher 1; and a third spray unit 43, arranged at an upper portion of the upper basket 52 in the height direction of the dishwasher 1.

[0062] Each of the plurality of spray units 41, 42, 43 may be configured to spray wash water while rotating. Each of the first spray unit 41, the second spray unit 42, and the third spray unit 43 may be configured to spray wash water while rotating. The plurality of spray units 41, 42, and 43 may be referred to as a plurality of spray rotors. The first spray unit 41, the second spray unit 42, and the third spray unit 43 may be referred to as a first spray rotor 41, a second spray rotor 42, and a third spray rotor 43, respectively.

[0063] The spray device 40 may also spray washing water in a manner different from the above-mentioned example. As an example, unlike the second spray unit 42 and the third spray unit 43, the first spray unit 41 may be fixed to one side of the lower surface 12b of the barrel 12. The first spray unit 41 may be configured to spray washing water in a substantially horizontal direction by means of a fixed nozzle, and the washing water sprayed in a horizontal direction from the nozzle of the first spray unit 41 may be directed to the upper side by means of a conversion assembly (not shown) arranged inside the washing chamber C. The conversion assembly may be arranged on a track by a bracket, and may be configured to be able to translate along the track.

[0064] The dishwasher 1 may include a sump assembly 70 .

[0065] The sump assembly 70 may be configured to receive wash water. The sump assembly 70 may collect wash water in the washing chamber C. As an example, for smooth collection of the sump assembly 70, the lower surface 12b of the tub 12 may be configured to be tilted downward toward the sump assembly 70. The wash water in the washing chamber C may flow along the slope of the lower surface 12b of the tub 12 and may flow smoothly into the sump assembly 70.

[0066] The sump assembly 70 may include a circulation pump 30 that pumps wash water stored in the sump assembly 70 to the spray device 40 .

[0067] The sump assembly 70 may include a drain pump 60 to drain wash water and foreign materials (eg, food residues, etc.) remaining in the sump assembly 70 .

[0068] The sump assembly 70 may pump the collected wash water and supply it to the spray device 40. The sump assembly 70 may be connected with the spray device 40 to supply the wash water to the spray device 40.

[0069] The sump assembly 70 may be independently connected to the first spray unit 41, the second spray unit 42, and the third spray unit 43. As an example, the sump assembly 70 may be independently connected to respective connectors connected to the first spray unit 41, the second spray unit 42, and the third spray unit 43. The connector may be configured in the shape of a connection port, a pipe, etc.

[0070] As an example, the second spray unit 42 and the third spray unit 43 may be composed of one connector, and the wash water provided through the one connector may flow into the connector. The wash water flowing into the connector may be branched and provided to at least one of the second spray unit 42 and the third spray unit 43 during the flow.

[0071] The dishwasher 1 may include an alternating device (not shown) for selectively supplying wash water to the spray device 40. The alternating device (not shown) may be driven to selectively supply wash water to each connector connected to each spray device 41, 42, 43. As an example, the alternating device (not shown) may selectively supply wash water to at least one of a connector connected to the first spray device 41 and a connector connected to the second spray device 42.

[0072] The dishwasher 1 may include a machine room M as a space provided below the tub 12. The machine room M may be a portion where a configuration for circulating wash water is arranged.

[0073] As an example, at least a portion of the sump assembly 70 may be disposed in the machine room M. Most of the sump assembly 70 may be disposed in the machine room M.

[0074] The dishwasher 1 may include a detergent box 80 configured to inject detergent into the interior of the tub 12 .

[0075] As an example, the dishwasher 1 may include a display portion that displays a driving state of the dishwasher 1 to the front of the dishwasher 1. However, since the front panel 90 is arranged on the front surface of the dishwasher 1, the display portion is formed small or the display portion is not exposed to the outside, so that the user may have difficulty recognizing the display portion.

[0076] As an example, due to the front panel 90 disposed on the front surface of the dishwasher 1 , a display portion that displays a state to the front of the dishwasher 1 may not be included.

[0077] As an example, the dishwasher 1 may include a display device 100 that displays an image I on the floor B where the dishwasher 1 is installed. As described above, since the front panel 90 arranged on the front surface of the dishwasher 1 may not be able to display the state of the dishwasher 1 to the front, the display device 100 may be configured to display the state of the dishwasher 1 by projecting the image I onto the floor B.

[0078] As an example, the display device 100 may be configured to externally display an image I by projecting light irradiated from a light source onto an image or the like.

[0079] As an example, the display device 100 may be disposed on the inner side of the door 20 .

[0080] As an example, the display device 100 may be disposed on the inner side of the outer surface 22 of the door 20 .

[0081] As an example, the display device 100 may be disposed on the rear surface of the front panel 90 .

[0082] As an example, the display device 100 may be arranged outside the dishwasher 1. The display device 100 may receive information on the state of the dishwasher 1 through wireless communication and display the state of the dishwasher 1 using an image I.

[0083] As an example, the display device 100 may be disposed on the rear surface of the front panel 90 , and may be disposed apart from the dishwasher 1 .

[0084] As an example, the display device 100 may be arranged in a space different from the dishwasher 1. The display device 100 may receive information about the state of the dishwasher 1 through wireless communication and display the state of the dishwasher 1 using an image I. As an example, when the dishwasher 1 is arranged in the kitchen of the interior space, the display device 100 may be arranged in the living room. As an example, the display device 100 may be arranged on an art wall of the living room or on the inner side of a wall forming the living room and project the image I onto the floor of the living room.

[0085] However, hereinafter, a type in which the display device 100 is arranged on the inner side of the outer surface 22 is described as an example.

[0086] Figure 4 is a control block diagram of a dishwasher according to an embodiment, Figure 5 is a conceptual diagram of a display device according to an embodiment, Figure 6 is a perspective view of a display device according to an embodiment, Figure 7 is a perspective view of a display device according to an embodiment, Figure 8 is a cross-sectional view of a display device according to an embodiment.

[0087] like Figure 4 and Figure 5 As shown, the display device 100 may include an image forming unit 1000 for forming an image I.

[0088] As an example, the display device 100 may include a display control part 900 that controls the display device 100. The display control part 900 may control the display device 100 by transmitting / receiving a signal with the main control part 9 of the dishwasher 1 so that the display device 100 performs an operation.

[0089] As an example, the display control unit 900 may be configured as a component of the main control unit 9 of the dishwasher 1 , or may be configured as a component separate from the main control unit 9 and configured to perform wired or wireless communication with the main control unit 9 .

[0090] The display control section 900 may include at least one memory and at least one processor to perform the aforementioned operations and the operations described below.

[0091] As an example, the memory and the processor may be implemented by separate chips, respectively. As an example, the processor may include one or more processor chips, or may include one or more processing cores. As an example, the memory may include one or more memory chips, or may include one or more memory blocks. As an example, the memory and the processor may also be implemented by a single chip.

[0092] like Figures 5 to 8 As shown, the image forming unit 1000 may include a light source 1100 .

[0093] The image forming unit 1000 may include a display device 1200 that transmits light generated from the light source 1100 and displays an image i1.

[0094] The image forming unit 1000 may include an illumination lens 1300 that focuses light generated from the light source 1100 onto the display device 1200 .

[0095] The image forming part 1000 may include a reflector 1400 that guides the light generated from the light source 1100 to the illumination lens 1300 .

[0096] The image forming unit 1000 may include a printed circuit board 1500 on which chips constituting the above-mentioned memory and processor are mounted.

[0097] The display device 100 may include an adjustment portion 2000 including a refractive lens 2100 configured to adjust a size of an image formed by the image forming portion 1000 .

[0098] The adjustment unit 2000 may be configured to adjust the size and focus of the image I projected onto the ground B by adjusting the size of the image I displayed on the display device 1200 .

[0099] The adjustment unit 2000 may be configured to project an image I having a larger size than the image I displayed on the display device 1200 onto the ground B.

[0100] The adjustment unit 2000 may be configured to adjust the focus of the image I projected onto the ground B, so as to improve the visibility of the image I to the user.

[0101] The adjustment unit 2000 may be configured to move relative to the image forming unit 1000 to adjust the focus of the image I displayed on the ground B.

[0102] When the image formed by the image forming unit 1000 is transmitted to the adjusting unit 2000, the distance between the image forming unit 1000 and the adjusting unit 2000 can be adjusted by moving the adjusting unit 2000, thereby adjusting the size and focus of the image I displayed on the ground B.

[0103] As an example, the adjustment unit 2000 may be arranged at a lower side than the image forming unit 1000 and may be configured to move relative to the image forming unit 1000 in the up and down directions to adjust the size and focus of the image I displayed on the ground B.

[0104] The display device 100 may include a housing 3000 that houses the image forming unit 1000 and the adjustment unit 2000 .

[0105] For a display device that projects an image, a predetermined distance or more is required from the display device to display the image, and in order to project the image in accordance with the irradiation distance, a predetermined optical path LP1 between the image forming unit and the adjustment unit is required.

[0106] Accordingly, the display device forms a housing for respectively covering the image forming part, the adjustment part, and the light path LP1 , and as the housings are arranged at intervals, the volume of the display device may increase.

[0107] In the case of a beam projector type display device for displaying the status of a household appliance, since the image is irradiated onto the lower side in front of the household appliance, the beam projector type display device can be arranged at the lower part of the front surface of the household appliance, preferably, can be arranged on the inner side of the door of the household appliance or the panel of the household appliance forming the front surface.

[0108] At this time, when the volume of the display device increases, it is difficult to arrange the display device inside a door of the home appliance or a panel of the home appliance.

[0109] When the optical path LP1 between the image forming part and the adjusting part is reduced or limited to a predetermined length in order to reduce the size of the display device, the resolution of the image displayed on the ground may be reduced because the focal range of the image displayed on the ground is limited, and it is difficult to install the display device because the position for setting the display device is limited.

[0110] As an example, since the image forming section 1000 and the adjusting section 2000 and the light path LP1 between the image forming section 1000 and the adjusting section 2000 are all arranged in the housing 3000 formed as one unit, the display device 100 is configured to be able to solve the above-mentioned problems.

[0111] The volume of the display device 100 can be minimized by forming the housing 3000 as one unit, and thus the display device 100 is easily disposed inside the door 20 .

[0112] The housing 3000 may be configured to enable the adjustment portion 2000 to move relative to the image forming portion 1000 to change the distance between the image forming portion 1000 and the adjustment portion 2000 .

[0113] Accordingly, even at various installation positions of the display device 100 in the up-down direction, the resolution and size of the image I displayed on the ground B can be easily adjusted by adjusting the distance between the image forming unit 1000 and the adjusting unit 2000. As an example, the distance between the image forming unit 1000 and the adjusting unit 2000 can be adjusted in a plurality of sections or continuously.

[0114] Specifically, the housing 3000 may include a first housing 3100 in which the image forming portion 1000 is disposed and a second housing 3200 in which the adjustment portion 2000 is disposed.

[0115] As an example, the interior of the first housing 3100 may be configured to house all components constituting the image forming unit 1000 .

[0116] As an example, the interior of the second housing 3200 may be configured to house all components constituting the adjustment unit 2000 .

[0117] The second housing 3200 may be combined with the first housing 3100 in a manner of being relatively movable with respect to the first housing 3100 .

[0118] As an example, the second housing 3200 may be disposed on a lower side of the first housing 3100 .

[0119] As an example, the second housing 3200 may be configured to be combined with the first housing 3100 from the lower side to the upper side of the first housing 3100 in the up-down direction. As an example, the first housing 3100 may be arranged on the upper side of the second housing 3200 in the up-down direction.

[0120] As an example, the second housing 3200 may be configured to move relative to the first housing 3100 .

[0121] As an example, the second housing 3200 may be configured to relatively move with respect to the first housing 3100 in relative up and down directions.

[0122] Accordingly, all components constituting the image forming unit 1000 and all components constituting the adjusting unit 2000 are respectively arranged inside the first shell 3100 and the second shell 3200 and the first shell 3100 and the second shell 3200 are combined with each other, so that the shell 3000 can accommodate all components of the display device 100, and thus the volume of the display device 100 can be minimized.

[0123] Furthermore, the adjustment unit 2000 arranged inside the second shell 3200 is configured to move relative to the image forming unit 1000 arranged inside the first shell 3100 as the second shell 3200 moves relative to the first shell 3100, thereby easily adjusting the size and resolution of the image I displayed on the ground B.

[0124] Light may be configured to irradiate from the first housing 3100 to the second housing 3200 in the extension direction of the optical axis A, and the image I formed in the display device 100 may be projected to the outside through the second housing 3200. Accordingly, the second housing 3200 may include a projection port 3220 for projecting the image I from the display device 100.

[0125] As an example, the projection port 3220 may be configured to be open downward. As an example, the optical axis A may be formed to extend from the light source 1100 to the lower side toward the projection port 3220.

[0126] The light source 1100 , the lighting lens 1300 , and the display device 1200 may be sequentially arranged from the upper side in the up-down direction inside the first housing 3100 .

[0127] The reflector 1400 may be disposed between the light source 1100 and the illumination lens 1300 in the up-down direction.

[0128] As an example, the light source 1100 may be configured to be mounted on the printed circuit board 1500. As an example, the light source 1100 may be configured to be mounted on the lower surface 1520 of the printed circuit board 1500 in the up-down direction. As an example, the printed circuit board 1500 may be arranged on the upper side in the up-down direction inside the first housing 3100 compared to the reflector 1400, the illumination lens 1300, and the display device 1200.

[0129] As an example, the printed circuit board 1500 on which the light source 1100 is mounted, the reflector 1400 , the lighting lens 1300 , and the display device 1200 may be sequentially arranged inside the first housing 3100 from the upper side in the up-down direction.

[0130] As an example, the printed circuit board 1500 may be arranged inside the first housing 3100 in such a manner that a surface on which the light source 1100 is mounted faces downward.

[0131] As an example, as the second housing 3200 is disposed at a lower side of the first housing 3100 in the up-down direction, the refractive lens 2100 may be disposed at a lower side than the light source 1100 , the illumination lens 1300 , and the display device 1200 in the up-down direction.

[0132] The light source 1100 , the illumination lens 1300 , the display device 1200 , and the refractive lens 2100 may be sequentially arranged from the upper side in the up-down direction.

[0133] As an example, the light source 1100 may be configured to irradiate light downward as the light source 1100 is disposed on the lower surface 1520 of the printed circuit board 1500. The light irradiated from the light source 1100 may be configured to sequentially transmit the illumination lens 1300, the display device 1200, and the refractive lens 2100.

[0134] Accordingly, the light source 1100 , the illumination lens 1300 , the display device 1200 , and the refractive lens 2100 may be configured to be sequentially arranged with the optical axis A of the light irradiated from the light source 1100 as the center.

[0135] The second housing 3200 may be configured to move relative to the first housing 3100 in the direction of the optical axis A. As an example, the optical axis A of the display device 100 may be configured to be formed from the upper side to the lower side according to the arrangement of the light source 1100, and the second housing 3200 may be movable in the up-down direction.

[0136] When the light source 1100, the illumination lens 1300, the display device 1200 and the refractive lens 2100 are arranged sequentially in the direction of the optical axis A, the refractive lens 2100 can be configured to move relative to the light source 1100, the illumination lens 1300 and the display device 1200 in the direction of the optical axis A according to the relative movement of the second housing 3200.

[0137] As the second housing 3200 moves relative to the first housing 3100 in the direction of the optical axis A, the image forming unit 1000 disposed inside the first housing 3100 may be configured such that only the adjustment unit 2000 moves relative to the image forming unit 1000 while being fixed.

[0138] The light is transmitted through each structure through the optical axis A so that the image I is projected from the display device 100 to the ground B. At this time, the size and resolution of the image I can be different according to the length of the optical path LP1 between the display device 1200 and the refractive lens 2100 and the projection distance L from the display device 100 to the position where the image I is projected. At this time, as the projection distance L is constantly formed from the display device 100 to the position where the image I is projected to the ground B, the size and resolution of the image I can be adjusted according to the length of the optical path LP1 between the display device 1200 and the refractive lens 2100.

[0139] The display device 100 may be configured to move the position of the refractive lens 2100 in a state where the position of the display device 1200 is fixed by movement of the second housing 3200 among the positions of the display device 1200 and the refractive lens 2100 that determine the length of the light path LP1 .

[0140] In particular, as the second housing 3200 moves relative to the first housing 3100 in the direction of the optical axis A, the refractive lens 2100 can be configured to be able to move relative to the display device 1200 in the direction of the optical axis A, so that the optical path LP1 between the display device 1200 and the refractive lens 2100 can be easily changed by moving the second housing 3200.

[0141] That is, the resolution and size of the image I displayed on the ground B can be simply adjusted by the relative movement of the second shell 3200 to the first shell 3100. Accordingly, since the display device 100 does not require additional structure or space for adjusting the resolution and size of the image I, the volume of the display device 100 can be minimized.

[0142] like Figure 6 and Figure 7 As shown, as an example, the second housing 3200 may be configured in a barrel shape, and configured to be disposed adjacent to the first housing 3100 or disposed away from the first housing 3100 by rotation.

[0143] As an example, the second housing 3200 may be configured to rotate in a direction to move to the upper side, and accordingly, to be disposed adjacent to the first housing 3100 , thereby shortening the light path LP1 .

[0144] As an example, the second housing 3200 may be configured to rotate in the opposite direction to move to the lower side, and accordingly, be arranged away from the first housing 3100 , thereby lengthening the light path LP1 .

[0145] As an example, the first housing 3100 may include an internal threaded portion 3110 having threads formed at a predetermined angle, and the second housing 3200 may include an external threaded portion 3210 having threads corresponding to the threads of the internal threaded portion 3110 and configured to be inserted into the internal threaded portion 3110 and movable.

[0146] The user may adjust the arrangement distance between the second housing 3200 and the first housing 3100 by rotating the second housing 3200 , and accordingly, the focus of the image I may be adjusted by adjusting the light path LP1 .

[0147] The second housing 3200 may be configured to linearly move in the extending direction of the optical axis A by rotating, thereby changing the distance between the display device 1200 and the refractive lens 2100 , and accordingly, the focus of the image I may be adjusted.

[0148] Also, as the second housing 3200 moves in the up-down direction, the light source 1100 of the display device 100 may be configured to emit light in such a manner as to supply light to the display device 1200 .

[0149] As an example, the light source 1100 may be provided by an LED.

[0150] The brightness of the image I may be determined by the output of the light source 1100 , the light transmittance of the display device 1200 , the light utilization efficiency in the adjustment unit 2000 , and the length of the irradiation distance between the display device 100 and the ground B.

[0151] Furthermore, even if the image I maintains a predetermined brightness, the visibility of the image I will vary depending on the brightness of the surrounding area of ​​the ground B and the reflectivity or glossiness of the ground B.

[0152] Accordingly, considering the situation that the brightness of image I may become different depending on the environment around image I and the situation that the length of the illumination distance between the display device 100 and the ground B may be different, the light source 1100 can emit light in a state with a predetermined output value so as to display image I on the ground B with a brightness adjustable within a predetermined range.

[0153] As an example, the light source 1100 may emit light such that the brightness of the image I displayed on the ground B becomes approximately 50 lx to 600 lx.

[0154] As an example, the dishwasher 1 may include an illumination sensor 85. As an example, the illumination sensor 85 may be provided as a component of the display device 100.

[0155] As an example, the illuminance sensor 85 may sense the brightness of the ground B displaying the image I. As an example, the display control section 9000 may control the output of the light source 1100 based on the value sensed by the illuminance sensor 85 .

[0156] The light source 1100 may be mounted on the printed circuit board 1500 to receive power, and the on / off and output level of the light source 1100 may be controlled by the display control unit 9000. As an example, the light source 1100 may be configured to be mounted on the lower surface 1520 of the printed circuit board 1500 in the up-down direction so that the light source 1100 irradiates light to the lower side.

[0157] As an example, the printed circuit board 1500 may be arranged inside the first housing 3100 with its mounting surfaces on both sides arranged in the up-down direction. As an example, the printed circuit board 1500 may be arranged with its length direction oriented in the left-right direction Y.

[0158] As an example, a chip may be arranged on an upper surface 1510 of the printed circuit board 1500 , and a light source 1100 may be arranged on a lower surface 1520 of the printed circuit board 1500 .

[0159] As an example, a cable 1530 may be connected to the printed circuit board 1500 , and the cable 1530 is configured to electrically connect the chip and the display device 1200 .

[0160] As an example, the printed circuit board 1500 and a main board constituting the main control part 9 of the dishwasher 1 may be electrically connected via a cable.

[0161] As an example, a communication device may be mounted on or connected to the printed circuit board 1500 , and the communication device is configured to perform wireless communication with the mainboard.

[0162] As an example, the printed circuit board 1500 and a power supply part supplying power to the printed circuit board 1500 may be electrically connected through a cable.

[0163] The reflector 1400 may be disposed between the light source 1100 and the illumination lens 1300 in the up-down direction.

[0164] The reflector 1400 may be configured to reflect light irradiated from the surface of the light source 1100 at an angle greater than a predetermined angle and guide it to the illumination lens 1300 .

[0165] As an example, the reflector 1400 may be provided in a cylindrical shape extending in the up-down direction and having a hollow space.

[0166] As an example, the reflector 1400 may be provided in a polygonal column shape extending in the up-down direction and having a hollow space.

[0167] As an example, the reflector 1400 may be provided in a shape in which a cross-sectional area increases from an upper opening 1410 where the light source 1100 is arranged toward a lower opening 1420 where the illumination lens 1300 is arranged.

[0168] As an example, the lower opening 1420 of the reflector 1400 may be configured to have a larger diameter than the aperture of the illumination lens 1300. This is to prevent a portion of light reflected inside the reflector 1400 from failing to transmit to the illumination lens 1300 and being additionally reflected inside the reflector 1400, thereby reducing light efficiency.

[0169] As an example, the interior of the reflector 1400 may be provided by a metal material.

[0170] As an example, the interior of the reflector 1400 may be provided by a plastic material or the like, and the exterior may be provided by a reflective coating.

[0171] As an example, the inside of the reflector 1400 may be formed of a material having a white color, or may be provided to be painted in white.

[0172] The illumination lens 1300 may be configured to uniformly irradiate light to the entire area of ​​the display region of the display device 1200 .

[0173] As an example, the illumination lens 1300 may be configured to allow light to vertically transmit the display area of ​​the display device 1200 .

[0174] As an example, the illumination lens 1300 may be configured as a biconvex lens.

[0175] As an example, the illumination lens 1300 may be configured to irradiate the display device 1200 with light having a uniformity of 90% or more in the entire display area of ​​the display device 1200. This is to minimize the brightness deviation of the image I projected onto the ground B.

[0176] The light source 1100, the illumination lens 1300, and the display device 1200 may be sequentially arranged based on the optical axis A in such a manner that the distance between the display device 1200 and the illumination lens 1300 is smaller than the distance between the illumination lens 1300 and the light source 1100 based on the optical axis A. This is because the closer the illumination lens 1300 is to the display device 1200, the more conducive it is for light to be vertically transmitted to the display area of ​​the display device 1200.

[0177] As an example, in the illumination lens 1300, when the lens surface facing the light source 1100 is defined as a first lens surface and the lens surface facing the display device 1200 is defined as a second lens surface, the curvature of the first lens surface may be configured to be greater than the curvature of the second lens surface. This is because when the distance between the display device 1200 and the illumination lens 1300 is arranged to be smaller than the distance between the illumination lens 1300 and the light source 1100, it is beneficial for light to be vertically transmitted to the display area of ​​the display device 1200.

[0178] The light irradiation area of ​​the illumination lens 1300 in the diameter direction may be configured to be larger than the area of ​​the display region of the display device 1200. When the center of the illumination lens 1300 and the center of the display region of the display device 1200 are arranged on the same line with the center of the optical axis A as a reference, the display region of the display device 1200 may be configured to be arranged inside the illumination lens 1300 in the radial direction of the optical axis A.

[0179] This is because when the light irradiation area of ​​the illumination lens 1300 is formed to be larger than the display area of ​​the display device 1200, light can be vertically irradiated to the entire display area. Preferably, the light irradiation area of ​​the illumination lens 1300 can be configured to be 1.1 to 1.5 times the size of the display area of ​​the display device 1200.

[0180] As an example, the lens surface of the illumination lens 1300 may be configured as a non-spherical surface. This is because the light extraction efficiency of the edge portion of the illumination lens 1300 is improved by adjusting the refractive index of the light incident to the edge portion of the illumination lens 1300, thereby improving the uniformity of the amount of light incident to the display area of ​​the display device 1200.

[0181] As an example, the lighting lens 1300 may be made of polycarbonate (PC) material.

[0182] As an example, the illumination lens 1300 may be made of polymethylmethacrylate (PMMA) material.

[0183] As an example, the illumination lens 1300 may be made of a glass material.

[0184] The display device 1200 may be configured to display information of an image I. An image displayed on the display device 1200 while light irradiated from the light source 1100 transmits the display device 1200 may be displayed in the image I projected onto the ground B.

[0185] As an example, the display device 1200 may be provided by an LCD.

[0186] As an example, the display device 1200 may be provided in the form of a film on which images, numbers, etc. are printed.

[0187] The display device 1200 may be configured to display the remaining operation time, contamination level, reservation, error, operation status, etc. of the dishwasher 1. The display device 1200 may be configured to display in the image I by inputting numbers, images, symbols, etc.

[0188] As an example, the display device 1200 may be configured by an LCD, and the LCD may be configured to include a color filter so as to display a plurality of colors in the image I.

[0189] As an example, the display device 1200 may be configured by an LCD. Preferably, the diameter or width of the LCD may be configured to be about 10 mm, and the display device 100 may be configured so that the image I displayed on the ground is projected as an image larger than the diameter of the LCD.

[0190] As an example, the diameter or width of the LCD may be configured to be about 10 mm, and when the light source 1100 is configured by an LED, the distance between the light source 1100 and the display area of ​​the display device 1200 may be configured to be about 15 mm to 20 mm in consideration of the Lambertian distribution in the light emitting surface in the light source 1100. This is to maximize the light efficiency of light emitted from the light source 1100 by considering the Lambertian distribution. As an example, the illumination lens 1300 may be arranged within the distance between the light source 1100 and the display area of ​​the display device 1200, and the distance between the illumination lens 1300 and the display area of ​​the display device 1200 may be configured to be about 0.5 mm to 1.5 mm. This is to improve the light focusing efficiency to the display device 1200 according to the refraction of the illumination lens 1300.

[0191] As an example, the display device 1200 may be provided by an LCD, and the display device 1200 may include a seven-segment LCD for displaying numbers. As an example, in the seven-segment LCD, the total area of ​​the segments displaying numbers may be provided to be 75% or more relative to the entire display area of ​​the seven-segment LCD. This is to maintain the brightness of the image I above a predetermined value by ensuring that the area of ​​the segments in the seven-segment LCD is above a predetermined value.

[0192] The refractive lens 2100 may be configured to adjust the size and resolution of the image I projected onto the ground B.

[0193] The curvature, thickness, material, position, etc. of the refractive lens 2100 can be variously set according to the size of the display area of ​​the display device 1200, the target size of the image I, and the target resolution of the image I.

[0194] As an example, the refractive lens 2100 may be provided in plurality according to the target size of the image I and the target resolution of the image I. As an example, preferably, the refractive lens 2100 may be composed of one to five refractive lenses.

[0195] As an example, the refractive lens 2100 may include a first refractive lens 2110 disposed closest to the display device, a second refractive lens 2120 disposed at a lower side of the first refractive lens, and a third refractive lens 2130 disposed at a lower side of the second refractive lens.

[0196] As an example, the first refractive lens 2110 may be configured such that light projected from the display device 1200 travels in parallel while transmitting the first refractive lens 2110 .

[0197] The first refractive lens 2110 may include a first lens surface 2111 facing the display device 1200 and a second lens surface 2112 opposite to the first lens surface 2111 .

[0198] As an example, the first lens surface 2111 of the first refractive lens 2110 may be configured as a surface convex toward the direction of the display device 1200. The second lens surface 2112 of the first refractive lens 2110 may be configured as a flat surface.

[0199] As an example, the second refractive lens 2120 may be configured as a concave lens.

[0200] As an example, the second refractive lens 2120 may be configured to diffuse the light beam transmitted through the first refractive lens 2110 .

[0201] As an example, the third refractive lens 2130 may be configured as a convex lens.

[0202] As an example, the third refractive lens 2130 may be configured to focus the light transmitted through the second refractive lens 2120 so that the image I is displayed on the ground B.

[0203] As an example, the light of the transmissive display device 1200 may be configured to sequentially transmit the first refractive lens 2110 , the second refractive lens 2120 , and the third refractive lens 2130 and be projected onto the ground B.

[0204] As an example, the display device 100 may be configured to display the image I on the ground B with an area larger than the display area of ​​the display device 1200 by means of the first refractive lens 2110 , the second refractive lens 2120 , and the third refractive lens 2130 .

[0205] As an example, each of the first refractive lens 2110 , the second refractive lens 2120 , and the third refractive lens 2130 may preferably be configured to have a thickness of 2.5 mm or more.

[0206] As an example, the curvature of the lens surface of each of the first refractive lens 2110 , the second refractive lens 2120 , and the third refractive lens 2130 may be configured to be greater than 10 mm.

[0207] As an example, the refractive lens 2100 may be made of polycarbonate (PC) material.

[0208] As an example, the refractive lens 2100 may be made of polymethylmethacrylate (PMMA) material.

[0209] As an example, the refractive lens 2100 may be made of a glass material.

[0210] As an example, the refractive lens 2100 may include cyclic olefin copolymer (COC: Cyclic Olefin Copolymers) material.

[0211] Since the dishwasher 1 is configured not to be exposed to the outside of the front panel 90 for aesthetics, the lower end 90b of the front panel 90 may be configured to be arranged at a position lower in the up-down direction than the lower end 20b of the door 20 of the dishwasher 1. Also, the display device 100 is arranged at the rear side of the front panel 90 in the front-back direction, and since the display device 100 is arranged at the inner side of the door 20, the display device 100 is configured to irradiate light toward the ground B from a position higher than the lower end 20b of the door 20 in the up-down direction.

[0212] At this time, a portion of the light projected from the display device 100 may be blocked by the lower end 20b of the door 20, so that a portion of the image I projected on the ground B may not be displayed. In order to prevent this, when the area of ​​the display region of the display device 1200 is defined as d1, the height y from the ground B to the third refractive lens 2130, the height h from the lower end 90b of the front panel 90 to the third refractive lens 2130, and the distance x between the aperture D of the third refractive lens 2130 and the center of the aperture D of the third refractive lens 2130 from the rear end 90r of the front panel 90 in the front-to-back direction may be configured to satisfy the following formula.

[0213] d1=2y / h*(xD / 2)+D As an example, although D is defined as the aperture of the third refractive lens 2130, it may also be defined as the aperture of the lens with the largest aperture among the plurality of refractive lenses 2100. As an example, among the plurality of refractive lenses 2100, the aperture of the third refractive lens 2130 is formed to be the largest, so that D is defined as the aperture of the third refractive lens 2130, but when the aperture of the second refractive lens 2120 is formed to be larger than the aperture of the third refractive lens 2130, D may be defined as the aperture of the second refractive lens 2120.

[0214] Hereinafter, the housing 3000 will be described in detail.

[0215] Fig. 9 is an exploded perspective view of a housing of a display device according to an embodiment, Fig.10 is an exploded perspective view of a second housing of a display device according to an embodiment.

[0216] As described above, the image forming part 1000, the adjustment part 2000, and the light path LP1 between the image forming part 1000 and the adjustment part 2000 of the display device 100 are all arranged in the housing 3000 formed as a unit, so that the volume of the display device 100 can be minimized. Accordingly, the display device 100 can be arranged on the rear side of the front panel 90 or between the doors 20.

[0217] The first housing 3100 may include a first shell 3120 and a second shell 3130 in such a manner that the configuration of the image forming unit 1000 is accommodated inside the first housing 3100. The first shell 3120 and the second shell 3130 may be detachably coupled to each other. In a state where the first shell 3120 and the second shell 3130 are separated, the configuration of the image forming unit 1000 may be accommodated in the first shell 3120 or the second shell 3130, and by coupling the first shell 3120 and the second shell 3130, the configuration of the image forming unit 1000 may be configured to be arranged inside the first housing 3100.

[0218] As an example, the first housing 3120 and the second housing 3130 may be configured to be combined in the up-down direction. As an example, the first housing 3120 may be arranged on the upper side, and the second housing 3130 may be arranged on the lower side of the first housing 3120.

[0219] As an example, the first housing 3120 may be configured such that the upper surface 3123 is sealed and the lower surface is opened. As an example, the second housing 3130 may be combined with the lower surface of the opened first housing 3120 to form the first housing 3100 .

[0220] As an example, since the upper surface 3123 of the first shell 3120 is sealed, even if condensation occurs inside the door 20 of the dishwasher 1 on the upper side of the first housing 3100 , moisture can be prevented from penetrating into the housing 3000 .

[0221] As an example, a printed circuit board 1500 , a light source 1100 , a lighting lens 1300 , a reflector 1400 , and a display device 1200 may be arranged inside the first housing 3120 .

[0222] As an example, the printed circuit board 1500 may be disposed at an upper portion of the interior of the first housing 3120. Since the upper surface 3123 of the first housing 3120 is sealed, external moisture may be prevented from flowing into the printed circuit board 1500.

[0223] As an example, the first shell 3120 may include a fixing component 3121 , which is arranged inside the first shell 3120 and is used to fix the printed circuit board 1500 , the reflector 1400 , the lighting lens 1300 and the display device 1200 inside the first shell 3120 .

[0224] As an example, the printed circuit board 1500 may be fixed to the upper side of the fixing member 3121 .

[0225] As an example, the light source 1100 , the illumination lens 1300 , and the reflector 1400 may be arranged inside the fixing component 3121 .

[0226] As an example, the display device 1200 may be fixed to the lower side of the fixing member 3121 .

[0227] As an example, the fixing member 3121 may be configured to be combined with the second housing 3130 .

[0228] Each component is fixed to the inside of the first shell 3120 by the fixing component 3121 , and is combined with the first shell 3120 through the second shell 3130 , so that each component can be arranged inside the first housing 3100 in a state of being fixed to the fixing component 3121 .

[0229] As an example, the first housing 3120 may include an exhaust port 3125 for exhausting heat generated from the light source 1100. The internal temperature of the first housing 3100 may increase due to the heat generated from the light source 1100, thereby damaging the printed circuit board 1500 and the light source 1100, but a thermal cycle can be performed through the exhaust port 3125, and the internal temperature of the first housing 3100 can be reduced by heat dissipation caused by the thermal cycle.

[0230] As an example, the exhaust port 3125 may be arranged at a higher position than the printed circuit board 1500 to enable heat circulation. As an example, the exhaust port 3125 may be provided at an upper portion of the first housing 3120 in a shape in which a portion of the first housing 3120 is opened to be arranged adjacent to the light source 1100. This is because the printed circuit board 1500 is arranged at an inner upper side of the first housing 3120.

[0231] As an example, an eave portion 3126 configured to prevent moisture from penetrating from the outside may be included on the upper side of the discharge port 3125 .

[0232] As an example, a chamfered portion 3124 may be included between the upper surface 3123 of the first housing 3120 and the side surface 3218 extending along the lower side from the edge of the upper surface 3123. This is to prevent moisture from accumulating on the upper surface 3123 when moisture flows into the display device 100 due to water leakage inside the door 20. The chamfered portion 3124 may be configured so that moisture flowing into the upper surface 3123 flows to the lower portion of the first housing 3100 through the chamfered portion 3124.

[0233] The second housing 3130 may be provided with an internal thread portion 3110 having threads formed at a constant angle.

[0234] As an example, the internal thread portion 3110 may be configured to be arranged at a lower portion of the second housing 3130 and open downward.

[0235] The internal thread portion 3110 may include a hollow space 3111 so that the external thread portion 3210 is inserted into the internal thread portion 3110 to rotate, and light transmitted from the display device 1200 may be irradiated to the second housing 3200 through the hollow space 3111 .

[0236] As an example, the internal thread portion 3110 may be configured to extend from the upper end to the rear end of the second housing 3130. As an example, the internal thread portion 3110 may be configured to have a cylindrical or polygonal shape with a hollow space 3111. As an example, the display device 1200 is arranged at the upper end of the internal thread portion 3110, so that the light transmitted from the display device 1200 can be directly irradiated to the hollow space 3111 of the internal thread portion 3110.

[0237] As an example, the second housing 3200 may be configured in a barrel shape. As an example, the second housing 3200 may be configured in a cylindrical or polygonal shape including a hollow space.

[0238] An external thread portion 3210 may be disposed at an upper portion of the second housing 3200 , and the second housing 3200 may be configured to be coupled to the first housing 3100 by inserting the external thread portion 3210 into the internal thread portion 3110 .

[0239] The second housing 3200 may include a lens receiving portion 3270 disposed at a lower portion of the external thread portion 3210 , and the lens receiving portion 3270 receives a plurality of refractive lenses 2110 , 2120 , and 2130 at an inner side of the second housing 3200 .

[0240] As an example, the second housing 3200 may be formed with a plurality of grooves 3250 extending in the direction of the optical axis A on the outer peripheral surface where the lens receiving portion 3270 is arranged.

[0241] A plurality of grooves 3250 may be provided to be arranged in opposite directions to each other in the circumferential direction of the second housing 3200 , and formed on the outer circumferential surface of the second housing 3200 in a concave-convex shape or a repeated pattern of grooves and protrusions 3250 longer than the adjustment length LP2 along the optical axis A direction.

[0242] The user can adjust the height of the second housing 3200 by rotating the second housing 3200 , thereby adjusting the focus of the image I. When the second housing 3200 is rotated, as the external thread portion 3210 moves upward or downward through the thread of the internal thread portion 3110 , the length of the optical path LP1 can be adjusted.

[0243] The second housing 3200 may include a handle 3260 protruding in a radial direction of the second housing 3200 so that a user can easily hold the second housing 3200 .

[0244] As an example, the handle 3260 may be provided in a ring shape and protrude in a radial direction of the second housing 3200 from an outer peripheral surface of the lens receiving portion 3270 .

[0245] As an example, the handle 3260 may be configured in a protrusion shape and protrude in a radial direction of the second housing 3200 .

[0246] As an example, the handle 3260 may be arranged at a lower side compared to a stopper 3140 to be described later, and the stopper 3140 to be described later may be inserted into a lower portion of the plurality of grooves 3250 having a concave-convex shape along the optical axis A direction.

[0247] As an example, the handle 3260 may be arranged on the lower side of the lens storage portion 3270 in the up-down direction. As an example, the handle 3260 may be arranged on the upper side of the lens storage portion 3270 in the up-down direction. As an example, the handle 3260 may be arranged on the lens storage portion 3270 in the up-down direction.

[0248] The external thread portion 3210 can be moved in the up-down direction by rotating in the internal thread portion 3110 by an extent corresponding to the adjustment length LP2, and the length of the optical path LP2LP1 can be adjusted by the extent of the length change of the adjustment length LP2.

[0249] The length of the adjustment length LP2 may be configured to be approximately the same as or smaller than the length of the external thread portion 3210 in the up-down direction.

[0250] The length of the plurality of grooves 3250 having a concave-convex shape may be configured to be the same as or longer than the focus adjustment length LP2 in the direction of the optical axis A in the up-down direction.

[0251] The first housing 3100 may include a stopper 3140 that limits any rotation of the second housing 3200 relative to the first housing 3100 .

[0252] As an example, the stopper 3140 may be detachably provided to the first housing 3100. As an example, the stopper 3140 may be provided to be combined with the second housing 3130. As an example, the stopper 3140 may be formed as one body with the second housing 3130. As an example, the stopper 3140 may be formed as one body with the first housing 3120.

[0253] As an example, more than one stopper 3140 may be provided. As an example, the stopper 3140 may be provided as a pair. As an example, a pair of stoppers 3140 may be connected to both side ends in the 180 degree direction of the outer circumference of the lens storage portion 3270 to limit the second housing 3200 from rotating further than the position desired by the user.

[0254] As an example, three or more stoppers 3140 may be provided. As an example, a plurality of stoppers 3140 may be provided so as to be spaced apart and arranged in a circumferential direction of the outer peripheral surface of the lens storage portion 3270 so as to be connected to the lens storage portion 3270 .

[0255] As an example, the stopper 3140 may limit the second housing 3200 from rotating at will by applying a force to the second housing 3200 .

[0256] As an example, the user may rotate the second housing 3200 by applying a force greater than a force according to tension between the stopper 3140 and the lens receiving portion 3270 to the lens receiving portion 3270 .

[0257] As an example, the stopper 3140 may include: an arm 3141 extending in the direction of the optical axis A; and an insertion protrusion 3142 arranged on the lower side of the arm 3141 in the up and down directions and inserted into any one of the multiple grooves 3250 of the concave and convex shapes.

[0258] As an example, the arm 3141 may be made of an elastic material. When the insertion protrusion 3142 is inserted into any one of the plurality of grooves 3250, the insertion protrusion 3142 may be maintained in the groove by the elasticity of the arm 3141. At this time, unless the user rotates the lens storage portion 3270 with a force greater than the tension of the insertion protrusion 3142 inserted into the groove due to the elasticity of the arm 3141, the insertion protrusion 3142 may be maintained in the groove.

[0259] As an example, by inserting the insertion protrusion 3142 into any one of the plurality of grooves 3250 , the second housing 3200 may be restricted from rotating arbitrarily.

[0260] When the second shell 3200 is rotated by pressure from the user, the insertion protrusion 3142 disengages from any one of the multiple grooves 3250, and when the rotation of the second shell 3200 is completed, the insertion protrusion 3142 is inserted into another groove among the multiple grooves 3250 that is closest to the insertion protrusion 3142 after the second shell 3200 rotates, thereby preventing the second shell 3200 from rotating arbitrarily thereafter.

[0261] As an example, when the insertion protrusion 3142 disengages from the high portion of the outer peripheral surface of the lens storage portion 3270 by rotation, the arm 3141 of the stopper 3140 rubs against the groove due to the elasticity and generates a sound of collision with the groove, and the user can adjust the rotation amount of the second shell 3200 by recognizing the sound during the adjustment process.

[0262] The second housing 3200 may include a first housing 3230 and a second housing 3240 in a manner that a plurality of refractive lenses 2110 , 2120 , and 2130 are accommodated inside the second housing 3200 .

[0263] The first housing 3230 and the second housing 3240 may be configured to extend in the direction of the optical axis A, and may be configured to be coupled to each other in a direction orthogonal to the optical axis A. This is to easily accommodate the plurality of refractive lenses 2110 , 2120 , and 2130 in the first housing 3230 or the second housing 3240 .

[0264] When the first shell 3230 and the second shell 3240 are configured to be combined in the direction of the optical axis A, it is necessary to stack the multiple refractive lenses 2110, 2120, 2130 on the first shell 3230 or the second shell 3240 to be housed inside the first shell 3230 or the second shell 3240. However, during the manufacturing process of stacking the multiple refractive lenses 2110, 2120, 2130, position tolerances of the multiple refractive lenses 2110, 2120, 2130 may occur, so that the optical axis A may be distorted.

[0265] However, since the first shell 3230 and the second shell 3240 are configured to extend along the optical axis A direction and to be combined with each other in a direction orthogonal to the optical axis A, as the multiple refractive lenses 2110, 2120, 2130 are stored in the first shell 3230 or the second shell 3240 in a vertical direction relative to the optical axis A direction and the first shell 3230 is combined with the second shell 3240 in a state where the first shell 3230 and the second shell 3240 are separated, the multiple refractive lenses 2110, 2120, 2130 can be easily stored in a designated position inside the second shell 3200.

[0266] The first refractive lens 2110 may include a first refractive lens holder 2111 surrounding the edge of the first refractive lens 2110. The lens receiving portion 3270 may include a first refractive lens insertion groove 3271 configured to allow the first refractive lens holder 2111 to be inserted and received in the second housing 3200.

[0267] The second refractive lens 2120 may include a second refractive lens holder 2121 surrounding the edge of the second refractive lens 2120. The lens receiving portion 3270 may include a second refractive lens insertion groove 3272 configured to allow the second refractive lens holder 2121 to be inserted and received in the second housing 3200.

[0268] The third refractive lens 2130 may include a third refractive lens holder 2131 surrounding the edge of the third refractive lens 2130. The lens receiving portion 3270 may include a third refractive lens insertion groove 3273 configured to be inserted into the third refractive lens holder 2131 and received in the second housing 3200.

[0269] During the manufacturing process, due to the small size of the multiple refractive lenses 2110, 2120, 2130, each refractive lens 2110, 2120, 2130 is not inserted into its own refractive lens insertion groove 3271, 3272, 3273, but each refractive lens 2110, 2120, 2130 is inserted into a refractive lens insertion groove different from each other, so that the multiple refractive lenses 2110, 2120, 2130 may be arranged in the wrong order in the up and down direction.

[0270] In order to prevent this, the respective refractive lens holders 2111 , 2121 , 2131 may include identification portions having different sizes or different shapes from each other.

[0271] The first refractive lens supporter 2111 may include a first identification portion 2112 .

[0272] The second refractive lens supporter 2121 may include a second identification portion 2122 .

[0273] The third refractive lens bracket 2131 may include a third identification portion 2132 .

[0274] The first refractive lens insertion groove 3271 may have a shape corresponding to the first logo portion 2112 so that the first logo portion 2112 is inserted.

[0275] The second refractive lens insertion groove 3272 may have a shape corresponding to the second logo portion 2122 so that the second logo portion 2122 is inserted.

[0276] The third refractive lens insertion groove 3273 may have a shape corresponding to the third logo portion 2132 so that the third logo portion 2132 is inserted.

[0277] That is, it is configured to be formed in different shapes or different sizes along with each identification portion 2112, 2122, 2132, so that it is difficult to insert the refractive lens into the insertion groove 3271, 3272, 3273 that does not correspond to each identification portion 2112, 2122, 2132, and thus each refractive lens 2110, 2120, 2130 can be easily stored in a predetermined position.

[0278] In the home appliance including the display device that projects an image for displaying state information of the home appliance according to an embodiment, the display device is arranged behind a front panel arranged on a front surface of the home appliance.

[0279] The display device is configured to project the image downward from the household appliance.

[0280] The display device includes: an image forming unit including a light source, a display device and an illumination lens, the display device radiates light generated from the light source and displays an image, and the illumination lens focuses the light generated from the light source to the display device; an adjustment unit including a refractive lens, the refractive lens is configured to adjust the size of the image displayed from the display device so as to adjust the size of the image projected by the display device; and a housing that accommodates the image forming unit and the adjustment unit.

[0281] The adjustment unit is provided so as to be relatively movable with respect to the image forming unit.

[0282] The display device is configured to project the image onto a floor on which the home appliance is installed, with a size larger than that of the image displayed on the display device.

[0283] The light source, the illumination lens, the display device and the refractive lens are arranged in sequence in the up and down direction.

[0284] The refractive lens is configured to move relative to the light source, the illumination lens, and the display device in the up-down direction.

[0285] The housing includes a first housing for accommodating the image forming unit and a second housing for accommodating the adjustment unit.

[0286] The second housing is configured to be movable relative to the first housing, and the second housing includes a projection port configured at a lower portion of the second housing, so that an image transmitted through the refractive lens is projected toward the bottom of the housing.

[0287] The second housing is configured to move relative to the first housing to change the distance between the display device and the refractive lens.

[0288] The second housing is provided so as to be reciprocatable relative to the first housing in the up-down direction by rotating.

[0289] The first housing includes an internal thread portion disposed at a lower portion of the first housing.

[0290] The second housing includes an external thread portion disposed at an upper portion of the second housing and rotatably coupled to the internal thread portion.

[0291] The internal thread portion and the external thread portion are arranged between the refractive lens and the display device in the up-down direction.

[0292] The housing further includes a telescope portion disposed between the refractive lens and the display device in the up-down direction and configured to extend and contract in the up-down direction.

[0293] The projection port is arranged at a position higher than a lower end of an outer panel arranged in front of the front panel, with reference to a floor on which the home appliance is installed.

[0294] The refractive lens is provided as a plurality of refractive lenses.

[0295] When the area of ​​the image displayed on the ground where the household appliance is installed is defined as d1, the aperture of the refractive lens arranged at the lower end among the multiple refractive lenses is defined as D, the height from the aperture of the refractive lens to the lower end of the outer panel is defined as h, the height from the ground to the aperture of the refractive lens arranged at the lower end is defined as y, and the distance between the aperture center of the refractive lens arranged at the lower end and the rear end of the outer panel along the front-to-back direction is defined as x, the following formula is satisfied.

[0296] d1=2y / h*(xD / 2)+D

[0297] The display device further includes a reflector disposed inside the first housing and guiding the light generated from the light source to the illumination lens.

[0298] The display device further comprises: a printed circuit board on which a chip for controlling the light source and the display device is mounted.

[0299] The printed circuit board is arranged inside the first housing.

[0300] The plurality of refractive lenses are provided to be sequentially arranged inside the second housing along a direction in which the second housing moves.

[0301] The plurality of refractive lenses include: a first lens, which is arranged at the uppermost side in the up-down direction, allows light transmitted from the display device to be incident, and includes a convex first surface and a second surface facing the first surface and flat; a second lens, which is arranged at the lower side of the first lens in the up-down direction and is configured as a concave lens; and a third lens, which is arranged at the lowermost side in the up-down direction and is configured as a convex lens.

[0302] In a display device for projecting an image according to one embodiment, the display device includes: an image forming unit, including a light source, a display device and an illumination lens, the display device transmits light generated from the light source and displays an image, and the illumination lens focuses the light generated from the light source to the display device; an adjustment unit, including a plurality of refractive lenses, the plurality of refractive lenses are configured to adjust the size of an image displayed on the display device so as to adjust the size of an image projected from the display device; and a housing, housing the image forming unit and the adjustment unit.

[0303] The adjustment unit is provided so as to be relatively movable with respect to the image forming unit in a state in which the image forming unit is fixed.

[0304] The light source, the illumination lens, the display device and the plurality of refractive lenses are arranged in sequence with respect to an optical axis A formed by the image forming unit.

[0305] The plurality of refractive lenses are configured to move relative to the light source, the illumination lens, and the display device in the direction of the optical axis A.

[0306] The housing includes a first housing for accommodating the image forming unit and a second housing for accommodating the adjustment unit.

[0307] The second housing is configured to be movable relative to the first housing, and the second housing includes a device configured to project an image transmitted through the plurality of refractive lenses to the outside of the housing.

[0308] The second housing is configured to move relative to the first housing to change the distance between the display device and the refractive lens.

[0309] In the dishwasher according to one embodiment, which includes a display device that projects an image displaying status information of the dishwasher onto a floor on which the dishwasher is installed, the display device includes: an image forming portion including a light source, a display device, and an illumination lens, the display device transmits light generated from the light source and displays an image, and the illumination lens focuses the light generated from the light source onto the display device; an adjustment portion including a refractive lens, the refractive lens is configured to adjust the size of the image displayed on the display device so as to adjust the size of the image projected from the display device; and a housing that accommodates the image forming portion and the adjustment portion.

[0310] The housing includes a first housing that accommodates the image forming unit and a second housing that accommodates the adjustment unit, the second housing being configured to be relatively movable with respect to the first housing.

[0311] Effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by a person having ordinary knowledge in the technical field to which the present invention belongs through the following description.

[0312] The above is a diagram and description of a specific embodiment. However, the present invention is not limited to the above embodiment, and a person with ordinary knowledge in the technical field to which the present invention belongs can fully change the implementation in various ways without departing from the technical concept of the invention described in the claims.

Claims

1. A household appliance, comprising a front panel and a display device arranged behind the front panel, wherein the display device comprises: an image forming unit, comprising a light source, a display device and an illumination lens, wherein the display device is configured to transmit light generated from the light source to display an image and project the image below the household appliance, and the illumination lens focuses the light generated from the light source; an adjusting portion including a refractive lens configured to adjust the size of the image projected from the image forming portion and configured to be relatively movable with respect to the image forming portion; and The housing accommodates the image forming unit and the adjusting unit.

2. The household appliance according to claim 1, further comprising: a door having a front surface combined with the rear surface of the front panel and opening the interior space of the household appliance to the front, Wherein, the display device is arranged on the inner side of the door.

3. The household appliance according to claim 1, wherein: The door further includes a rear surface facing the inner space when the door closes the inner space. The display device is combined with the door in a manner of being arranged between the front panel and the rear surface of the door.

4. The household appliance according to claim 1, wherein: The housing includes a first housing and a second housing, wherein the first housing accommodates the image forming unit, and the second housing includes a projection port provided at a lower portion so that an image transmitted through the refractive lens is projected toward the lower portion of the housing. The second housing is configured to be movable relative to the first housing, so that the refractive lenses can move relative to the display device.

5. The household appliance according to claim 4, wherein: The second housing is configured to be movable relative to the first housing, so that the distance between the display device and the refractive lens is changed to adjust the size of the image displayed downward.

6. The household appliance according to claim 4, wherein: The second housing is provided so as to be movable relative to the first housing in the up-down direction by rotation.

7. The household appliance according to claim 6, wherein: The first housing includes an internal thread portion arranged at a lower portion of the first housing, The second housing includes an external thread portion disposed at an upper portion of the second housing and rotatably coupled to the internal thread portion.

8. The household appliance according to claim 7, wherein: The internal thread portion and the external thread portion are arranged between the refractive lens and the display device in the up-down direction.

9. The household appliance according to claim 4, further comprising: an outer panel, arranged in front of the front panel, The projection port is arranged at a position higher than the lower end of the outer panel with reference to the ground on which the household appliance is installed.

10. The household appliance according to claim 2, wherein: The housing includes a first housing and a second housing, wherein the first housing accommodates the image forming unit, and the second housing accommodates the adjusting unit and includes a projection port provided at the lower portion so that the image transmitted through the refractive lens is projected to the lower portion of the housing. The second housing is configured to be movable relative to the first housing so that the refractive lenses can move relative to the display device. The projection opening is arranged at a position higher than the lower end of the door based on the ground where the household appliance is installed.

11. The household appliance according to claim 4, wherein: The display device further includes a reflector disposed inside the first housing and guiding the light generated from the light source to the illumination lens.

12. The household appliance according to claim 4, wherein: The display device further comprises: a printed circuit board mounted with a chip for controlling the light source and the display device, The printed circuit board is arranged inside the first housing.

13. The household appliance according to claim 1, wherein: The display device is configured to project the image onto a floor on which the home appliance is installed, with a size larger than that of the image displayed on the display device.

14. A dishwasher comprising a display device for projecting an image showing status information of the dishwasher onto a floor on which the dishwasher is installed, wherein the display device comprises: first shell; an image forming unit, comprising a light source, a display device and an illumination lens, wherein the display device is configured to transmit light generated from the light source to display an image and project the image onto a floor on which the dishwasher is disposed, the illumination lens condenses the light generated from the light source, and the image forming unit is accommodated inside the first housing; Second shell; as well as an adjusting portion, which is received in the second housing and includes a refractive lens configured to adjust the size of the image projected from the display device, The second housing is configured to be able to move relative to the first housing, so that the refractive lenses can move relative to the display device.

15. The dishwasher according to claim 14, further comprising: a washing room, for washing dishes; as well as a door, opening and closing the washing chamber forwardly, Wherein, the display device is arranged on the inner side of the door.

Images