Display apparatus

Provided is a display apparatus having a transparent mode for outputting an internal object and a related image when the internal object is seen through a transparent display and an opaque mode for outputting an image having the same level as in an existing LCD display when an accurate image needs to be output on the display. A display apparatus according to an embodiment may include a main body, and a display unit coupled to the main body and configured to implement at least one of a transparent mode and an opaque mode, wherein the display unit includes a transparent display panel exposed at a front surface of the main body, a first light source disposed behind the transparent display panel, a transparency adjusting unit disposed behind the first light source, and a second light source disposed behind the transparency adjusting unit.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims the benefit of Korean Patent Application No. 10-2013-0158483, filed on Dec. 18, 2013 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND

Apparatuses and methods consistent with exemplary embodiments relate to providing a display apparatus for outputting a transparent and opaque image using a transparent display.

2. Description of the Related Art

Display apparatuses serving as media terminals for delivering information to humans have shown a very rapid growth rate from initial cathode ray tube (CRT)-type monochrome display apparatuses having an extremely large volume to recent super-thin and large-area full color display apparatuses.

Display apparatuses are being developed for displaying images with more sophistication and beauty than apparatuses for displaying only simple text and images.

Transparent displays, whose development has recently accelerated, are apparatuses capable of showing items which are located behind the display by increasing transmittance of the display, and are used for showcases, information windows, and the like.

Current transparent displays of the related art are designed such that a separate internal light source is provided in order for an object to be disposed inside of a showcase or the like having a transparent display to be visible. In this case, it is possible to see through the transparent display to the internal object, but there is no uniform light source. Therefore, according to a position of the light source and a position of the object, it is difficult to see an image displayed on the display and the color reproduction of the display is decreased.

SUMMARY

Exemplary embodiments address at least the above problems and/or disadvantages and other disadvantages not described above. Also, exemplary embodiments are not required to overcome the disadvantages described above, and an exemplary embodiment may not overcome any of the problems described above.

One or more exemplary embodiments may provide a display apparatus having a transparent mode for outputting an internal object and a related image when the internal object is seen using a transparent display.

One or more exemplary embodiments may also provide a display apparatus having an opaque mode for outputting an image having the same level as in an existing LCD display when an accurate image needs to be output on the display.

According to an aspect of an exemplary embodiment, there is provided a display apparatus including: a main body; and a display unit coupled to the main body and configured to implement at least one of a transparent mode and an opaque mode, wherein the display unit includes a transparent display panel exposed at a front surface of the main body, a first light source disposed behind the transparent display panel, a transparency adjusting unit disposed behind the first light source, and a second light source disposed behind the transparency adjusting unit.

The opaque mode may be a mode that is implemented such that an object accommodated inside the main body is not visible through the display unit from the outside.

The transparency adjusting unit may include a mesh-type structure.

The transparency adjusting unit may reflect light output from the first light source.

A first surface of the transparency adjusting unit may include a white material such that the light output from the first light source is reflected by the first surface.

The transparency adjusting unit may absorb the light output from the second light source.

A second surface of the transparency adjusting unit may include a black material such that the light output from the second light source is absorbed by the second surface.

The first light source may be disposed behind an edge of a rear surface of the transparent display panel.

The second light source may be installed inside the main body.

At least one of the first light source and the second light source may include a linear light source.

The display unit may further include a communicating unit configured to receive data from the outside and a controller configured to perform signal processing of the received data and output a driving command corresponding to the signal processing.

The controller may be further configured to output a driving command for turning the first light source off and turning the second light source on such that a transparent image is displayed on the transparent display panel according to the signal processing.

The controller may output a driving command for turning the first light source on and turning the second light source off such that an opaque image is displayed on the transparent display panel according to the signal processing.

The controller may be further configured to set a transparency of the transparent display panel to one of a high, a medium, or a low transparency according to the signal processing.

In response to a transparency of the transparent display panel being set to a high transparency according to the signal processing, the controller may be further configured to output a driving command for turning the first light source off and turning the second light source on.

In response to a transparency of the transparent display panel being set to a medium transparency according to the signal processing, the controller may be further configured to output a driving command for turning the first light source and the second light source on.

In response to a transparency of the transparent display panel being set to a low transparency according to the signal processing, the controller may be further configured to output a driving command for turning the first light source on and the second light source off. According to an aspect of another exemplary embodiment, there is provided a display apparatus including: a display panel having a variable transparency, including: a transparent display panel having a front side display surface configured to display an image and a rear side surface opposite to the front side display surface; a mesh panel disposed behind the rear side surface of the transparent display panel including: a front side surface facing the rear side surface of the transparent display and having a surface for reflecting light; and a rear side surface opposite to the front side surface and having a surface for absorbing light; a first light disposed in an area between the rear surface of the transparent panel and the front side surface of the mesh panel; a second light disposed in an area behind the rear side surface of the mesh panel; and a controller configured to vary the transparency of the display panel by controlling the first light source and the second light source.

The controller may be further configured to vary the transparency of the display panel between opaque and transparent.

When the first light is off and the second light is on, the display panel may appear transparent.

When the first light is on and the second light is off, the display panel may appear opaque.

The front side surface of the mesh panel may be white, and the rear side surface of the mesh panel may be black.

The display apparatus may further include a main body, and the display panel may be configured to form a portion of a surface of the main body.

The main body may include one of a showcase, a refrigerator, an oven, and a microwave.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

The exemplary embodiments described in this specification and illustrated in the drawings are merely exemplary and are not to be construed as limiting. Accordingly, many alternatives, modifications, and variations of the exemplary embodiments will be apparent to those skilled in the art.

A display apparatus may include a main body and a display unit that is detachably installed in a main body and that implements a transparent mode and an opaque mode. Here, the transparent mode refers to a mode that is implemented such that an object accommodated inside the main body is visible from the outside, and the opaque mode refers to a mode that is implemented such that an object accommodated inside the main body is not visible from the outside.

The main body refers to a device such as a showcase, a refrigerator, a kimchi refrigerator, or a cooking appliance such as a microwave or an oven. The display unit may be fixed in an opening or form at least one surface of the showcase, the refrigerator, the kimchi refrigerator, or the cooking appliance such as the microwave or the oven or may be used as a door of the main body.

The showcase refers to a display case for storing and displaying objects such as ornaments, food, flowers, medicine, clothes, dishes, books, artifacts, and works of art. The showcase includes a display unit which may display an image that is provided in an opening of the showcase or provided at least one surface of the showcase.

Therefore, it is possible for users to see the image and identify objects inside the showcase. Here, the display unit may be formed such that it partially or entirely forms an opening of the showcase, and may be formed such that it partially or entirely forms at least one surface of the main body.

Hereinafter, certain exemplary embodiments will be described in detail with reference to the accompanying drawings. In the following description, the same drawing reference numerals are used for the same elements, even in different drawings. The matters defined in the description, such as detailed construction and elements, are provided to assist in a comprehensive understanding of the exemplary embodiments. Thus, it is apparent that the exemplary embodiments can be carried out without those specifically defined matters. Also, well-known functions or constructions are not described in detail since they would obscure the exemplary embodiments with unnecessary detail.

FIG. 1is a diagram illustrating an exemplary display apparatus10according to an exemplary embodiment.FIG. 2is a diagram illustrating the inside of the display apparatus10illustrated inFIG. 1, according to an exemplary embodiment.FIG. 3is an exploded perspective view of a display unit200provided in the display apparatus10illustrated inFIG. 1, according to an exemplary embodiment.FIGS. 4 and 5are diagrams illustrating a structure of the display unit200illustrated inFIG. 3, according to an exemplary embodiment.

For convenience of description, the display apparatus10including a body100implemented as a refrigerated showcase that maintains freshness of food and a door200implemented as the display unit that is installed in an opening of a main body110of the showcase will be described.

As illustrated inFIGS. 1 and 2, the refrigerated showcase serving as the body100includes the main body110, a storage space120, a shelf130, a machine room140, and a cold air creating room150.

The main body110forms an appearance of the showcase. The storage space120for storing food or other objects is formed inside the main body110, and an opening is formed in a front surface of the main body.

Lighting125for adjusting brightness in the refrigerated showcase (i.e., in the storage space120) and the shelf130for stacking food are provided in the storage space120.

The machine room140may be positioned below the storage space120. The machine room140may include a compressor141configured to compress a refrigerant, a condenser142configured to condense the high-temperature and high-pressure refrigerant compressed by the compressor141, a cooling fan143configured to cool heat generated from the compressor141and the condenser142and exchange hot air around the condenser142, a valve (not illustrated) that is provided between the condenser142and an evaporator151and that is opened or closed based on a temperature of the storage space120, a first power unit145connected to external commercial power and configured to convert the commercial power into power suitable for driving each unit and supply the converted power to each unit, and a cover146configured to open or close the machine room140.

The cold air creating room150may be positioned above the storage space120. The cold air creating room150includes the evaporator151configured to exchange heat of air inside the storage space120and a blower fan152configured to blow the cold air of which heat is exchanged by the evaporator151to the storage space120. Here, when the valve is opened and the refrigerant is provided from the condenser142, the evaporator151performs a cooling operation in which ambient latent heat is absorbed while a low-temperature liquid refrigerant is converted into a gas refrigerant. According to this operation, ambient air and air of the storage space120are cooled. That is, the evaporator151performs a function of cooling the storage space120.

The door200serving as a display unit (i.e., display unit200) is installed in an opening in the front of the main body110by a hinge, shields the storage space120from the outside, and thereby prevents cold air in the storage space120from leaking to the outside. That is, the door200opens or closes the storage space120, and an administrator, a user, or a consumer may open and close the door200to load and unload food to/from the storage space120.

As illustrated inFIGS. 3 and 4, the door200serving as a display unit includes a transparent display panel210exposed at the front of the main body110, a first light source230disposed behind the transparent display panel210, a transparency adjusting unit235disposed behind the first light source230, and a second light source245disposed behind the transparency adjusting unit235.

In addition, the door200serving as a display unit may further include the transparent display panel210, the first light source230, a frame220fixing the transparency adjusting unit235, a hinge (not illustrated) that is provided at a top portion and a bottom portion of a side of the frame220and that rotatably couples a side of the door200to the main body110, a packing240that is installed in the frame220on a surface contacting the front of the main body110and that absorbs shocks with the main body110when the door is closed, and a driving module250that is provided in a space between the frame220and the packing240, and that controls driving of the transparent display panel210, the first light source230, and the second light source245.

The frame220may include a plurality of frame members221and222. The plurality of frame members221and222may be detachably coupled to each other. Out of the plurality of frame members221and222, the packing240is detachably installed in the frame member abutting the showcase serving as the body100.

Each of the frame members221and222includes a hole (i.e., the frame members221and222are frame shaped), and the transparent display panel210, the first light source230, and the transparency adjusting unit235are disposed in the hole. That is, the frame220is disposed in a perimeter of the transparent display panel210and thereby forms an outline of the door200serving as a display unit.

In the plurality of frame members221and222, the transparent display panel210, the first light source230, and a plurality of support members224supporting the transparency adjusting unit235are provided. More specifically, the transparent display panel210is inserted between the frame members221and222, the first light source230is fixed behind the transparent display panel210, the transparency adjusting unit235is inserted behind the first light source230, and the transparent display panel210, the first light source230, and the transparency adjusting unit235are fixedly installed in the frame220by coupling of the two frame members221and222together. In this case, the plurality of support members224support each side surface of the transparent display panel210, the first light source230, and the transparency adjusting unit235. Here, the plurality of support members224also function as a coupling member coupling the two frame members221and222.

As illustrated inFIG. 5, a front surface area of the door200serving as a display unit includes a surface area A1of the transparent display panel210and a surface area A2of the frame220. In addition, in order to easily and safely install the driving module250, a width W1of the frame220of a side surface in which the driving module250is installed may be formed to be larger than widths W2, W3, and W4of the frame220of the remaining side surfaces.

The transparent display panel210may be a display panel such as a liquid crystal display (LCD) panel or an organic light emitting diode (OLED) display panel. For convenience of description, the LCD panel will be described.

The transparent display panel210according to the exemplary embodiments increases transmittance of cells constituting a liquid crystal panel, and transmits light both when the liquid crystal cells of the liquid crystal panel are driven and when no liquid crystal cell of the liquid crystal panel is driven. Put another way, the liquid crystal panel maintains a transparent state regardless of the driving.

Therefore, the transparent display panel210maintains a transparent state regardless of a display driving command. However, the transparency of the door200serving as the display unit as seen from the front of the main body110is adjusted under control of the first light source230and the second light source245. This will be described in greater detail below.

A light source may be any one of a cold cathode fluorescence lamp (CCFL) and an external electrode fluorescence lamp (EEFL), a luminescent diode array (LED array), lighting in the storage space120, natural light, etc. Hereinafter, the light source included in the display unit will be described.

The light source may include the first light source230and the second light source245. At least one first light source230and at least one second light source245may be provided.

More specifically, the first light source230may be installed behind the transparent display panel210. For example, the first light source230may include a linear light source and may be installed on an edge of the transparent display panel210. In order to increase uniformity of light to be output, the first light source230may include another linear light source symmetrically installed on the opposite edge of the transparent display panel210. In addition, the second light source245may be installed behind the transparency adjusting unit235. In order to increase uniformity of light to be output, the second light source245may be installed inside the showcase, and more specifically, on at least one surface among inner surfaces of the showcase in the form of a linear light source.

The first light source230according to the present exemplary embodiment may include a first light and a second light respectively installed on the left and right sides behind the rear surface of the transparent display panel210with respect to the front of the main body110. The second light source245may include a third light and a fourth light respectively installed on the left and right sides behind the rear surface of the transparency adjusting unit235with respect to the front of the main body110, and more specifically, may be installed on an upper surface inside the showcase and may provide a function of the lighting125.

The transparency adjusting unit235is disposed behind the first light source230, and allows an opaque image, that is, a more distinct image, to be displayed by the display unit200of the display apparatus10according to an exemplary embodiment.FIG. 6is a diagram illustrating the enlarged transparency adjusting unit235according an exemplary embodiment. Hereinafter, the transparency adjusting unit235will be described in detail with reference toFIG. 6.

As illustrated inFIG. 6, the transparency adjusting unit235has a mesh-type structure (e.g., a net, web, knit, or woven structure or material). A mesh-type structure may refer to a structure with a large number of small, evenly spaced holes which allow light to pass though. The transparency adjusting unit235having a mesh-type structure includes coating layers having different properties formed on a first surface S1and a second surface S2, respectively. Accordingly, light output from the first light source230and the second light source245is reflected or absorbed by the mesh-type structure depending on the properties of the coating layer.

More specifically, in the transparency adjusting unit235, reflectivity of the first surface S1facing the first light source230is high such that the light output from the first light source230is reflected by the first surface S1. For example, the first surface S1may include a coating layer comprising white paint such that the reflectivity of the first surface S1is high.

In contrast, the absorbance of the second surface S2facing the second light source245is high such that the light output from the second light source245is absorbed. For example, the second surface S2may include a coating layer comprising black paint such that the absorbance of the second surface S2is high.

The driving module250includes at least one printed circuit board (PCB). The driving module250includes a second power unit251configured to convert power of the first power unit145into driving power for a communicating unit252, driving power for a controller253, and driving power for a display driving unit254, the communicating unit252configured to receive data transmitted from a server, a controller253configured to perform signal processing on the received data and output a driving command corresponding to the signal-processed data, and a display driving unit254configured to display the data on the transparent display panel210and be driven in response to a command of the controller253such that transparency of the displayed data is adjusted.

The second power unit251is connected to the first power unit145of the main body110through a first cable C1and is supplied with power from the first power unit145. The first cable C1may be included in the body100and the door200. That is, the first cable C1may extend from the body100to the door200and may connect the first power unit145and the second power unit251.

FIG. 7is a diagram illustrating a control configuration of the display unit200provided in the display apparatus10according to an exemplary embodiment. The display unit200according to the present exemplary embodiment includes the second power unit251, the communicating unit252, the controller253, and the display driving unit254.

Any of the communicating unit252, the input unit260, the controller253, and the display driving unit254may include at least one of a processor, a hardware module, or a circuit for performing their respective functions.

Here, the second power unit251, the communicating unit252, the controller253, and the display driving unit254are provided in the driving module250which may be disposed in the frame220of the door200serving as a display unit.

The second power unit251is connected to the first power unit145of the main body110through the first cable C1, is supplied with power from the first power unit145, converts the supplied power into driving power for the communicating unit252, driving power for the controller253, and driving power for the display driving unit254, and supplies the converted power to the communicating unit252, the controller253, and the display driving unit254. The second power unit251may perform AC/DC conversion and DC/DC conversion.

The communicating unit252receives data transmitted from any one of the server and a terminal, and transmits the received data to the controller253. The communicating unit252may perform at least one of wired communication and wireless communication.

Here, examples of the data include advertising image data, food data such as a producer, an expiration date, nutrients, and country of origin for each food, event introduction image data, discount coupon image data, and guide map image data around the showcase. Such image data includes format information such as drawings, photographs, text, and videos.

In addition, the server performs at least one of wired communication and wireless communication with the communicating unit252, and the terminal performs wireless communication such as WiFi and Bluetooth with the communicating unit252. The terminal may also directly control driving of the transparent display panel210using an administrator terminal (not illustrated).

The controller253performs signal processing on the received data and outputs a driving command corresponding to the signal-processed data to the display driving unit254. In this case, the controller253receives data in a preset format and decodes the received format.

The display driving unit254is driven in response to a command of the controller253such that data is displayed on the transparent display panel210.

The display driving unit254drives the liquid crystal cells of the liquid crystal panel in response to a command of the controller253to thereby display an image on the transparent display panel210, and drives the first light source230and the second light source245to thereby adjust the transparency of the image displayed on the transparent display panel210.

Transparency adjustment of the display driving unit254will now be described in greater detail. The display driving unit254turns the first light source230off and turns the second light source245on in response to a command of the controller253, and thereby a transparent image may be displayed by the transparent display panel210. Also, by turning the first light source230on and turning the second light source245off, an opaque image may be displayed by the transparent display panel210. Here, when the first light source230is turned on and the second light source245is completely turned off, it is possible to adjust transparency of the image displayed by the transparent display panel210to be close to 0 (i.e., not transparent).

FIG. 8is a diagram illustrating a control configuration of the display unit200provided in the display apparatus10according to another exemplary embodiment. The display apparatus10according to the present exemplary embodiment further includes the storage unit256configured to store data and an input unit260configured to receive data received by the communicating unit252or data stored in the storage unit256in addition to the configuration illustrated inFIG. 7. Hereinafter, for convenience of description, description identical to that ofFIG. 7will be omitted.

In terms of a configuration of the driving module250, the second power unit251, the communicating unit252, the controller253, the display driving unit254, and the storage unit256may be provided in the single driving module250. The input unit260may be disposed together with the driving module250. As illustrated inFIG. 8, the input unit260may be disposed in the frame220and may be electrically connected to the controller253of the driving module250.

The second power unit251is connected to the first power unit145of the main body110through the first cable C1, is supplied with power from the first power unit145, converts the supplied power into driving power necessary for driving each configuration unit, and supplies the converted power to the communicating unit252, the controller253, the display driving unit254, the storage unit256, and the input unit260. The second power unit251may perform AC/DC conversion and DC/DC conversion.

The controller253performs signal processing on the data received by the communicating unit252and outputs a driving command corresponding to the signal-processed data to the display driving unit254. In this case, the controller253receives the data in a preset format and decodes the received format.

In addition, the controller253performs signal processing on data stored in the storage unit256and outputs a driving command corresponding to the signal-processed data to the display driving unit254.

As illustrated inFIG. 9, the controller253includes a first signal processing unit253aconfigured to perform signal processing on the data received by the communicating unit252, a second signal processing unit253bconfigured to perform signal processing on the data stored in the storage unit256, and a display controller253cconfigured to generate and output a driving command for displaying the data that is signal-processed in the first signal processing unit253aand the second signal processing unit253b.

Here, the first signal processing unit253amay include a signal processing unit configured to perform signal processing on data received via wired communication and a signal processing unit configured to perform signal processing on data received via wireless communication. The second signal processing unit253bmay encode/decode data when the data is stored in the storage unit256.

In addition, the controller253and the first and second processing units253a,253bmay also be provided separately. In this case, the first signal processing unit253aand the second signal processing unit253btransmit the signal-processed data to the controller253.

The storage unit256stores data transmitted from any of the server and the terminal. In this case, the data may be stored in the form of a compressed file.

The controller253may control driving of the display driving unit254based on a signal input from the input unit260. For specific description, a control configuration between the controller253and the input unit260will be described in detail.

The input unit260may include a power mode button for turning power on and off, a first mode button for displaying an advertising image transmitted from the server via wired and/or wireless communication, a second mode button for displaying an image stored in the storage unit256, and a third mode button for adjusting the transparency of the transparent display panel210.

The input unit260transmits a signal of the button input by the user to the controller253.

The controller253controls driving of the display driving unit254based on the signal of the button transmitted from the input unit260.

More specifically, while power is supplied to the transparent display panel210, when an input signal of the power mode button is transmitted, the controller253performs control such that image display of the transparent display panel210is terminated and thereby the transparent display panel210maintains a transparent state, and while power of the transparent display panel210is blocked, when an input signal of the power mode button is transmitted, the controller253controls image display of the transparent display panel210and thereby image information is displayed on the transparent display panel210.

The controller253performs control such that an advertising image transmitted from the server via wired and/or wireless communication is displayed on the transparent display panel210when an input signal of the first mode button is transmitted, an image stored in the storage unit256is displayed on the transparent display panel210when an input signal of the second mode button is transmitted, and transparency of an image displayed on the transparent display panel210is adjusted in the range of 0 to 100 when an input signal of the third mode button is transmitted.

Here, due to characteristics of the display apparatus10, the first mode and the second mode implemented in the transparent display panel210may be modes that are set to display an image having preset first transparency, and the third mode may be a mode that adjusts transparency of the image of the preset first mode and second mode.

Hereinafter, for convenience of description, a control process of the controller253will be described in detail by exemplifying a case in which the third mode is classified as a high mode, a medium mode, or a low mode according to transparency of an image to be displayed by the transparent display panel210. However, the third mode should be broadly understood as a concept including a mode for continuously adjusting transparency within the scope that can be easily conceivable by those skilled in the art.

When transparency is set to high in the third mode (hereinafter referred to as a “high mode”), the controller253turns the first light source230off and turns the second light source245on, and thereby a transparent image is displayed on the transparent display panel210. When transparency is set to low (hereinafter referred to as a “low mode”), the controller253turns the first light source230on and turns the second light source245off, and thereby an opaque image is displayed on the transparent display panel210. When transparency is set to medium (hereinafter referred to as a “medium mode”), the controller253turns the first light source230and the second light source245on, and thereby an image having medium transparency is displayed on the transparent display panel210.

Hereinafter, a principle of implementing the high mode and the low mode of the transparent display panel210by adjusting on and off states of the first light source230and the second light source245in the third mode will be described in detail with reference toFIGS. 10A and 10B.

FIG. 10Ais a diagram illustrating a principle of implementing the high mode according to an exemplary embodiment.

As illustrated inFIG. 10A, the high mode refers to a mode for displaying a transparent image on the transparent display panel210, in which the first light source230is turned off, the second light source245is turned on, the light output from the second light source245is applied to the transparent display panel210, and thereby a display image is output.

In this case, the light output from the second light source245is delivered to the second surface S2of the transparency adjusting unit235, and due to characteristics of the second surface S2of which absorbance is increased such that no (or very little) light is reflected, and the light delivered to the second surface S2is delivered to the transparent display panel210while minimizing light loss. Therefore, a transparent image may be displayed by the transparent display panel210.

FIG. 10Bis a diagram illustrating a principle of implementing the low mode according to an exemplary embodiment.

As illustrated inFIG. 10B, the low mode refers to a mode for displaying an image on the transparent display panel210without displaying an internal object, in which the first light source230is turned on, the second light source245is turned off, the light output from the first light source230is incident on the first surface S1of the transparency adjusting unit235and then is reflected, and thereby a display image is output.

In this case, the light output from the first light source230is delivered to the first surface S1of the transparency adjusting unit235, and due to characteristics of the first surface S1of which reflectivity is increased such that incident light is maximally reflected, the light delivered to the first surface S1is reflected and delivered to the transparent display panel210while minimizing light loss. In this case, due to a mesh structure of the transparency adjusting unit235, the light output from the first light source230is uniformly reflected and is output in a direction of the transparent display panel210, and an image having no (or very little) color loss is output through the display.

Next,FIGS. 11A and 11Bare diagrams illustrating images displayed by the transparent display panel210when the high mode and the low mode are implemented in the third mode of the display apparatus10according to an exemplary embodiment.

As illustrated inFIG. 11A, when the display apparatus10according to an exemplary embodiment is implemented in the high mode, transparent image information is output to the transparent display panel210. For example, when a pizza is accommodated inside the showcase and is exhibited, a production date, a production method, ingredients, freshness, and a price of the pizza, a chef's biography, and the like may be displayed on the front of the transparent display panel210, while the pizza accommodated therein is visible through the transparent display panel210.

As illustrated inFIG. 11B, when the display apparatus10according to an exemplary embodiment is implemented in the low mode, opaque image information is output to the transparent display panel210. Following the example inFIG. 11A, when the pizza is exemplified, it is possible to display an image related to a method of producing the pizza as necessary while the display apparatus10is used without the pizza being visible.

In this way, when the internal object is seen through the display apparatus10according to exemplary embodiments, it is possible to output the internal object and the related image in the high mode, and when an accurate image needs to be output to the display apparatus10, or when the internal object needs to be hidden, it is possible to output an image having the same (or similar) level as in an existing LCD display in the low mode.

Therefore, it is possible to provide may display options according to purposes of use of the user using the display apparatus10according to the exemplary embodiments.

The display apparatus according to the exemplary embodiments may have the following effects.

The display apparatus according to exemplary embodiments may provide a transparent display mode in which an object exhibited inside the display apparatus can be seen, and provides an opaque display mode when an accurate image having no color loss needs to be output. Therefore, it is possible to provide more cases according to purposes of use of the user.