Patent Description:
Recently, various wearable devices equipped with an Internet function are being developed. Along with this trend, the technology of Internet of Things (IoT) is continuously developing.

Research has been continuously conducted to develop garments that perform various functions by introducing IoT technology to people's clothing in addition to electrical appliances.

<CIT> discloses a process for making a stimuli responsive liquid crystal-polymer composite fiber that can be utilized in textiles.

Disclosed embodiments provide a smart garment capable of changing design, such as a color, an image, or text, which are implemented on the garment.

In accordance with an aspect of the present invention, there is provided a smart garment according to claim <NUM>. Embodiments of the invention are set out in the dependent claims. In the following, embodiments that do not fall within the scope of the claims represent exemplary embodiments that are useful for understanding the invention, but are not covered by the claimed invention.

The cholesteric liquid crystal fiber may include a cholesteric liquid crystal, a first electrode provided at one side of the cholesteric liquid crystal, a second electrode provided at a side opposite the first electrode, an insulator provided between the first electrode and the second electrode, and a protective layer provided to cover the first electrode, the second electrode, and the insulator.

Further, the cholesteric liquid crystal fiber may further include a connection portion provided to connect the cholesteric liquid crystal fibers so as to extend the cholesteric liquid crystal fiber.

Further, the connection portion may include a first connection electrode provided to connect the first electrodes of the cholesteric liquid crystal fibers, a second connection electrode provided to connect the second electrodes of the cholesteric liquid crystal fibers, and an insulator provided between the first connection electrode and the second connection electrode.

Further, the cholesteric liquid crystal may include a partition wall provided to maintain a shape of the cholesteric liquid crystal fiber.

Further, a cross section of the cholesteric liquid crystal fiber may be provided in any one of a circular shape and a polygonal shape.

A smart garment according to the disclosed embodiments can change a design element, such as a color, an image, or text, so that a user can change a design of the smart garment to a desired design, regardless of time and place.

Hereinafter, disclosed embodiments will be described in detail with reference to the accompanying drawings.

<FIG> is a conceptual view of a system according to one illustrated embodiment, and <FIG> and <FIG> are diagrams illustrating a configuration of a smart garment <NUM> according to one illustrated embodiment.

Referring to <FIG>, the system according to the illustrated embodiment includes the smart garment <NUM>, a provider terminal <NUM> configured to upload a design implementable on the smart garment <NUM> to a server <NUM>, the server <NUM> configured to store the design uploaded by the provider terminal <NUM>, and a user terminal <NUM> configured to download the design implementable on the smart garment <NUM> from the server <NUM> and transmit the design to the smart garment <NUM>.

The design of the smart garment <NUM> refers to a color, an image, text, or a combination thereof, which is displayable on the smart garment <NUM>.

A provider of the smart garment <NUM>, such as a seller or a business operator of the smart garment <NUM>, may upload the design implementable on the smart garment <NUM> to the server <NUM> using the provider terminal <NUM>. In addition to the above-described garment provider, a separate design provider or purchaser may freely upload a design of the smart garment <NUM> to the server <NUM>.

The provider terminal <NUM> may include a computer capable of communicating with the server <NUM> or a mobile device such as a smart phone or a tablet personal computer (PC). The devices are merely examples of the provider terminal <NUM>, and any device may be included in the range of the provider terminal <NUM> as long as the device is capable of communicating with the server <NUM>.

The provider of the smart garment <NUM> uploads identification information of the smart garment <NUM> on which the uploaded design can be implemented, for example, a product number, a trademark, a size, a material, and the like, when the design is uploaded to the server <NUM> so that a design that can be implemented on the smart garment <NUM> possessed by the purchaser can be easily retrieved.

The server <NUM> stores designs of the smart garment <NUM> uploaded from various provider terminals <NUM> to build a database. The server <NUM> may classify and store designs by providers who have uploaded the designs and classify and store designs uploaded by the same provider according to the type of smart garment <NUM>. A user may access the server <NUM> through the user terminal <NUM> and download the design from the server <NUM> after undergoing a predetermined authentication process.

When the user inputs the identification information of the smart garment <NUM>, for example, the product number, the trademark, the size, the material, and the like, through the user terminal <NUM> after undergoing the authentication process, the user may download a design of the smart garment <NUM> associated with the input identification information from the server <NUM> to the user terminal <NUM>.

The user terminal <NUM> may include a computer capable of communicating with the server <NUM> or a mobile device such as a smart phone or a tablet PC. The devices are merely examples of the user terminal <NUM>, and any device may be included in the range of the user terminal <NUM> as long as the device is capable of communicating with the server <NUM>. More specifically, the user terminal may include a communicator capable of communicating with the server or the smart garment, a display configured to display a user interface for changing a design of the smart garment, and a processor configured to generate a signal including a design of the smart garment and transmit the signal to the smart garment through the communicator when the design of the smart garment displayed on the display is selected.

The user terminal <NUM> may serve as the provider terminal <NUM> when the design of the smart garment <NUM> is uploaded to the server <NUM> through the user terminal <NUM>, and even the provider terminal <NUM> may serve as the user terminal <NUM> when the provider terminal <NUM> downloads the design of the smart garment from the server <NUM>.

The user terminal <NUM> transmits design information selected by the user from the design downloaded from the server <NUM> or a previously stored design to the smart garment <NUM>.

The smart garment <NUM> includes a connection module <NUM> that may receive the design information transmitted from the user terminal <NUM> and change the design of the smart garment <NUM> based on the received information.

As shown in <FIG>, when the connection module <NUM> of the smart garment <NUM> receives the signal including design information transmitted from the user terminal <NUM>, the smart garment <NUM> changes a color, displays or changes text, or displays or changes a pattern according to the received signal. That is, the user may implement various designs on one smart garment <NUM>.

The connection module <NUM> of the smart garment <NUM> will be first described in detail with reference to <FIG> and <FIG>, and a method of changing a design of the smart garment <NUM> and a user interface of the user terminal for changing a design of the smart garment <NUM> in the system according to one disclosed embodiment will be described in detail with reference to <FIG>.

Referring to <FIG>, the smart garment <NUM> includes the connection module <NUM> configured to receive a signal transmitted from the user terminal <NUM>. The connection module <NUM> may be provided at any position on the smart garment <NUM>. However, it is preferable for the connection module <NUM> to be provided at an edge of the garment which is easily connected to the user terminal <NUM> through a wired connection when considering the case of connecting to the user terminal <NUM> by wire.

As shown in <FIG>, the connection module <NUM> may include a communicator <NUM> configured to perform wired/wireless communication with the user terminal <NUM>, a processor <NUM> configured to generate a control signal for changing a design of the smart garment <NUM> according to a signal received by the communicator <NUM>, a driver <NUM> configured to apply a voltage to the smart garment <NUM> according to the control signal generated by the processor <NUM>, a memory <NUM> configured to store design information included in the signal received by the communicator <NUM> or information related to a current design of the smart garment <NUM>, and a battery configured to supply power to the smart garment <NUM>.

The communicator <NUM> of the connection module <NUM> is connected to the user terminal <NUM> through a communication scheme, such as a wireless local area network (LAN), Wi-Fi, Bluetooth, ZigBee, an ultra-wideband (UWB), infrared data association (IrDA), Bluetooth low energy (BLE), near field communication (NFC), and the like.

The driver <NUM> is connected to electrodes of color-changing fibers constituting the smart garment <NUM>, which will be described below, and applies a voltage to the electrodes according to the signal generated by the processor <NUM> so that the design of the smart garment <NUM> is changed. Only one driver <NUM> may be provided or a plurality of drivers <NUM> may be provided.

The memory <NUM> may include not only a volatile memory, such as a static random access memory (S-RAM), a dynamic RAM (D-RAM), and the like, but also a flash memory, such as a flash memory, a read only memory (ROM), an erasable programmable read only memory (EPROM), an electrically erasable programmable read only memory (EEPROM), and the like.

As shown in <FIG>, the connection module <NUM> may include all or at least one of the communicator <NUM>, the processor <NUM>, the driver <NUM>, and the battery <NUM>.

For example, the connection module <NUM> may include the communicator <NUM> and the driver <NUM>. In this case, the communicator <NUM> may receive the control signal generated by the processor of the user terminal <NUM>, and the driver <NUM> may change the design of the smart garment <NUM> by applying a voltage to the smart garment <NUM> according to the control signal received by the communicator <NUM>.

Alternatively, the connection module <NUM> may include the communicator <NUM>, the processor <NUM>, and the driver <NUM>. In this case, when the communicator <NUM> receives the signal including the design information transmitted from the user terminal <NUM>, the processor <NUM> generates the control signal for controlling the driver <NUM> according to the signal received by the communicator <NUM> and outputs the control signal to the driver <NUM>. The driver <NUM> may change the design of the smart garment <NUM> by applying a voltage to the smart garment <NUM> according to the control signal output from the processor <NUM> of the connection module <NUM>.

Alternatively, the connection module may include the communicator <NUM>, the processor <NUM>, the driver <NUM>, and the memory <NUM>. In this case, when the communicator <NUM> receives the signal including the design information transmitted from the user terminal <NUM>, the memory <NUM> stores the design information included in the signal received by the communicator <NUM>. Also, the memory <NUM> may store information related to a current design of the smart garment <NUM>. In addition, the processor <NUM> generates the control signal for controlling the driver <NUM> according to the signal received by the communicator <NUM> and outputs the control signal to the driver <NUM>. The driver <NUM> may change the design of the smart garment <NUM> by applying the voltage to the smart garment <NUM> according to the control signal output from the processor <NUM>.

Alternatively, the connection module <NUM> may include the communicator <NUM>, the processor <NUM>, the driver <NUM>, the memory <NUM>, and the battery <NUM>. When light emitting diodes are used as the color-changing fibers constituting the smart garment <NUM>, the battery <NUM> may be needed to supply power to the light emitting didoes. In addition, when cholesteric liquid crystals, electronic ink, or electrochromic devices having bistability are used as fabrics constituting the smart garment <NUM>, the battery <NUM> may be omitted. Descriptions of the remaining configurations are the same as the above descriptions, and thus will be omitted.

Alternatively, as shown in <FIG>, the connection module <NUM> of the smart garment <NUM> according to the disclosed embodiment may include only a connector <NUM> provided to be connected to the user terminal <NUM> by a wire. When the user terminal <NUM> and the smart garment <NUM> are connected by the connector <NUM>, the processor of the user terminal <NUM> may generate a signal for implementing a design selected by the user on the smart garment <NUM>, and the driver <NUM> of the user terminal <NUM> may apply a voltage for controlling the smart garment <NUM> through the connector <NUM> according to the signal generated by the processor <NUM>. When the signal for controlling the smart garment <NUM> is applied from the user terminal <NUM> through the connector <NUM>, the smart garment <NUM> may be changed to the design selected by the user.

Meanwhile, <FIG> is a flowchart illustrating a method of changing a design of the smart garment <NUM> of a system according to the disclosed embodiment, and <FIG> is a diagram illustrating a user interface for changing a design of the smart garment <NUM> according to the disclosed embodiment.

An application for changing a design of the smart garment <NUM> may be installed in the user terminal <NUM>. The application may provide a user interface related to pairing the smart garment <NUM> with the user terminal <NUM>, changing a design of the smart garment <NUM>, and the like through a display of the user terminal <NUM>.

Referring to <FIG>, when the application of the user terminal <NUM> is executed, the user terminal <NUM> searches for a nearby smart garment <NUM>. The application may be executed by a command of a user, or may be automatically executed when the nearby smart garment <NUM> is sensed. An autorun function of the application may be changed through settings of the application.

The user terminal <NUM> searches for the smart garment <NUM> and transmits a signal to the nearby smart garment <NUM> to be paired with the smart garment <NUM>. When the nearby smart garment <NUM> receives the signal transmitted from the user terminal <NUM> and transmits a signal in response to the received transmitted signal to the user terminal <NUM>, the user terminal <NUM> and the smart garment <NUM> are paired. As described above, the pairing of the smart garment <NUM> and the user terminal <NUM> may be performed through a communication scheme, such as a LAN, Wi-Fi, Bluetooth, ZigBee, a UWB, IrDA, BLE, NFC, and the like.

<FIG> and <FIG> illustrate a case in which one smart garment <NUM> is found. A case in which a plurality of nearby smart garments <NUM> are found will be described below, and searching and pairing of the smart garment <NUM> will be described below in detail. As shown in <FIG> and <FIG>, when there is one nearby smart garment <NUM>, the user interface shown in <FIG> is displayed on the display of the user terminal <NUM> once the user terminal <NUM> and the smart garment <NUM> are paired.

The user interface may include a garment display area <NUM> at an upper portion thereof where an image of the paired smart garment <NUM> is displayed, a color selection area <NUM> displayed below the garment display area <NUM> and provided to allow a color of the smart garment <NUM> displayed in the garment display area <NUM> to be selected, an image selection area <NUM> displayed below the color selection area <NUM> and provided to allow an image to be implemented on the smart garment <NUM> displayed in the garment display area <NUM> to be selected, and a text input area <NUM> provided below the image selection area <NUM> and provided to allow text to be displayed on the smart garment <NUM> displayed in the garment display area <NUM> to be input. Positions of the garment display area <NUM>, the color selection area <NUM>, the image selection area <NUM>, and the text input area <NUM> are not limited to the above-described positions, and may be variously set. For example, the user may change the positions as desired through application settings. The user may select a desired color or image or may input text through the user interface, and the user terminal <NUM> transmits a signal including information selected or input through the user interface to the smart garment <NUM> so that the design of the smart garment <NUM> can be changed. The connection module <NUM> of the smart garment <NUM> according to the present embodiment may include at least the connector <NUM>, as shown in <FIG>, or at least the communicator <NUM> and the driver <NUM> among the configuration shown in <FIG>.

The image of the smart garment <NUM> displayed in the garment display area <NUM> may be a representative image set as a default in association with the paired smart garment <NUM>. For example, when the paired smart garment <NUM> is a short-sleeved t-shirt, a representative image that does not reflect a shape or the like of the paired short-sleeved t-shirt and is designed to allow the user to intuitively recognize that the smart garment is a short-sleeved t-shirt may be displayed in the garment display area <NUM>. According to another embodiment, an image similar to the actual smart garment <NUM> reflecting a current design of the smart garment <NUM> may be displayed in the garment display area <NUM>, which will be described below with reference to <FIG>.

The color selection area <NUM> may be displayed in various colors in a matrix form, as shown in <FIG>. The user may change the color of the smart garment <NUM> by touching a desired color among the colors displayed in the color selection area <NUM> or by selecting the color through a separate inputter, such as a keyboard or a mouse. Once the color is selected, the changed color may be reflected in the image of the smart garment <NUM> displayed in the garment display area <NUM>. A manner in which colors are displayed in the color selection area <NUM> is not limited to the above-described example, and may be variously set. The user may change a display format of the colors through the application setting, and may set frequently used colors to be preferentially displayed.

The image selection area <NUM> may display images including a pattern or design stored in advance in the user terminal <NUM> in association with the paired smart garment <NUM>, as shown in <FIG>. Like the image selection area <NUM> or the color selection area <NUM>, various images may be displayed in a matrix form. The user may change the image implemented on the smart garment <NUM> by touching a desired image among the images displayed in the image selection area <NUM>, or by selecting the image through a separate inputter, such as a keyboard or a mouse. Once the image is selected, the changed image may be reflected in the image of the smart garment <NUM> displayed in the garment display area <NUM>.

As described above, in addition to the images stored in advance in the user terminal <NUM> in association with the paired smart garment <NUM>, images, such as photographs stored in the user terminal <NUM>, may also be displayed in the image selection area <NUM>. In addition, an object for driving a camera may also be displayed to display an image directly captured by the camera of the user terminal <NUM> on the smart garment <NUM>. That is, when the user touches the object or clicks the object through an inputter, the camera installed in the user terminal <NUM> is driven so that the user can acquire a desired image by camera capturing. When camera capturing is performed, the captured image may be displayed on the smart garment <NUM> displayed in the garment display area <NUM>. The user may select an image displayed in the image selection area <NUM> through application settings. That is, only the images stored in advance in the user terminal <NUM> in association with the paired smart garment <NUM> may be set to be displayed, or only images such as photos stored in the user terminal <NUM> may be displayed. In addition, only the object for driving the camera may be set to be displayed so that the image directly captured by the camera of the user terminal <NUM> can be displayed on the smart garment <NUM>.

In the text input area <NUM>, a representation, such as <text input>, for allowing the user to know that a corresponding area is provided for text input may be displayed. Alternatively, the text input area <NUM> may be displayed as a blank space without a separate guide. When the user touches the text input area <NUM> or clicks it through a separate inputter, the user terminal <NUM> displays a keyboard for text input to enable the user to input desired text. A detailed description thereof will be given below. Text may be input through the keyboard or may be input via voice. The user may input text through the keyboard or input text via voice by application settings. An icon for guiding a keyboard input of text and an icon for guiding a voice input of text may be displayed in the text input area <NUM> so that the user can select a desired text input method by touching or clicking the icon for guiding the desired text input method.

When text is input to the text input area <NUM>, the input text may be displayed on the smart garment <NUM> displayed in the garment display area <NUM>.

<FIG> is a flowchart illustrating a method of changing a design of a smart garment <NUM> of a system according to another disclosed embodiment, <FIG> and <FIG> are diagrams illustrating a user interface for searching for and pairing with the smart garment <NUM> displayed on a user terminal <NUM> according to the disclosed embodiment, and <FIG> is a diagram illustrating a user interface for changing a design of the smart garment <NUM> according to another embodiment.

Referring to <FIG>, when an application of the user terminal <NUM> is executed, the user terminal <NUM> searches for a nearby smart garment <NUM>. The application may be executed by a command of a user, or may be automatically executed when the nearby smart garment <NUM> is sensed. An autorun function of the application may be changed through settings of the application.

The user terminal <NUM> searches for the smart garment <NUM> and transmits a signal to the nearby smart garment <NUM> to be paired with the smart garment <NUM>. When the nearby smart garment <NUM> receives the signal transmitted from the user terminal <NUM> and transmits a signal in response to the received transmitted signal to the user terminal <NUM>, the user terminal <NUM> and the smart garment <NUM> are paired.

As shown in <FIG> and <FIG>, the user terminal <NUM> may provide the user interface for searching for the smart garment <NUM> and pairing with the found smart garment <NUM>. As shown in <FIG>, the user interface may display a garment display area <NUM>, a search button for searching for the nearby smart garment <NUM> below the garment display area <NUM>, and a pairing button <NUM> for pairing with the found smart garment <NUM> in a display of the user terminal <NUM>. Positions of the garment display area <NUM>, the search button <NUM>, and the pairing button <NUM> are not limited to the above-described positions, and may be variously set. For example, the user may change the positions as desired through application settings.

When the user touches or clicks the search button <NUM> to search for the nearby smart garment <NUM>, as shown in <FIG>, an image of a magnifying glass may be displayed in the garment display area <NUM> so that the user can intuitively recognize that the nearby smart garment <NUM> is being searched for.

When the nearby smart garment <NUM> is found, images of the found smart garments <NUM> may be displayed in a matrix form in the garment display area <NUM>, as shown in <FIG>. The user may select the smart garment <NUM> desired to be paired with among the smart garments <NUM> displayed in the garment display area <NUM> by touching or clicking the desired smart garment <NUM>, and may pair the selected smart garment <NUM> with the user terminal <NUM> by touching or clicking the pairing button <NUM>.

As shown in <FIG>, when the smart garment <NUM> and the user terminal <NUM> are paired, the smart garment <NUM> extracts a current color thereof and a current image or text implemented on the smart garment <NUM> and transmits them to the user terminal <NUM>. The connection module <NUM> of the smart garment <NUM> according to the present embodiment may include at least the communicator <NUM>, the processor <NUM>, the driver <NUM>, and the memory <NUM>, and design information of the current smart garment <NUM> may be stored in the memory <NUM>.

The user terminal <NUM> may display an image similar to the actual smart garment <NUM> reflecting the current design of the paired smart garment <NUM> or the like in the garment display area <NUM> on the basis of information transmitted from the smart garment <NUM>. For example, as shown in <FIG>, the user terminal <NUM> may display an image including a color of the paired smart garment <NUM> and a pattern or design implemented on the smart garment <NUM>, or, when text is implemented, an image reflecting the text in the garment display area <NUM>. A description of the other user interface shown in <FIG> is the same as that shown in <FIG>, and thus will be omitted.

The user may select a desired color or image or input text through the user interface, and the user terminal <NUM> may transmit a signal including the information selected or input through the user interface to the smart garment <NUM> so that the design of the smart garment <NUM> can be changed.

<FIG> is a flowchart illustrating a method of changing a design of a smart garment <NUM> of a system according to still another disclosed embodiment, and <FIG> are diagrams illustrating a user interface for changing a design of the smart garment <NUM> according to still another disclosed embodiment.

A description of paring of the user terminal <NUM> and the smart garment <NUM> is the same as the description of <FIG>, and thus will be omitted.

When the connection module <NUM> of the smart garment <NUM> is paired with the user terminal <NUM>, the connection module <NUM> transmits identification information of the smart garment <NUM> to the user terminal <NUM> and the user terminal <NUM> transmits the identification information of the smart garment <NUM> transmitted from the smart garment <NUM> to the server <NUM>. The connection module <NUM> of the smart garment <NUM> according to the present embodiment may include at least the communicator <NUM>, the processor <NUM>, the driver <NUM>, and the memory <NUM>, and design information or identification information of the current smart garment <NUM> may be stored in the memory <NUM>.

The server <NUM> searches for a design of the smart garment <NUM> represented by the identification information on the basis of the identification information of the smart garment <NUM> transmitted from the user terminal <NUM> and transmits found design information to the user terminal <NUM>. The user terminal <NUM> downloads the design of the paired smart garment <NUM> from the server <NUM> and displays the downloaded design in the color selection area <NUM> and the image selection area <NUM> of the user interface shown in <FIG>. Text implementable on the smart garment <NUM> may also be displayed as an image in the image selection area <NUM>.

A method of changing a design of the paired smart garment <NUM> through the user interface provided by the user terminal <NUM> will be described in detail with reference to <FIG>.

As shown in <FIG> and <FIG>, a user interface of the user terminal <NUM> is similar to the user interface shown in <FIG>. The user interface shown in <FIG> and <FIG> is different from the user interface shown in <FIG> in that an interface for changing the smart garment <NUM> displayed in the garment display area <NUM> to another found smart garment <NUM> and an interface <NUM> provided for a user to recognize that the smart garment <NUM> displayed in the garment display area <NUM> is a paired garment when the smart garment <NUM> is paired with the user terminal <NUM> are further displayed in the garment display area <NUM>.

When the user intends to change the smart garment <NUM> displayed in the garment display area <NUM> to another found smart garment <NUM>, as shown in <FIG>, the user may touch or click the interface for changing the smart garment <NUM>. Alternatively, the user may input a drag gesture or a flick gesture among touch gestures to the garment display area <NUM> to change the smart garment <NUM> displayed in the garment display area <NUM> to another smart garment <NUM>.

When the smart garment <NUM> displayed in the garment display area <NUM> is changed, the color selection area <NUM>, the image selection area <NUM>, and the text input area <NUM> are changed to suit the changed smart garment <NUM>. For example, when the changed smart garment <NUM> does not support text input, a representation that conveys a meaning that text input is not possible, for example, <none>, is displayed in the text input area <NUM>, as shown in <FIG>.

Also, as shown in <FIG>, when the changed smart garment <NUM> is a smart garment that is not paired with the user terminal <NUM>, the user terminal <NUM> does not display the interface indicating the pairing. In addition, when the smart garment <NUM> displayed in the garment display area <NUM> is changed to the paired smart garment <NUM>, the user terminal <NUM> displays an interface indicating that the displayed smart garment <NUM> is paired with the user terminal <NUM>.

Meanwhile, when the user intends to implement an image on the paired smart garment <NUM> or change an existing image, the user may change the image of the smart garment <NUM> by touching or clicking the image, pattern, or design displayed in the image selection area <NUM>. As shown in <FIG>, an object for selecting photographs stored in the user terminal <NUM> may be displayed in the image selection area <NUM> in addition to the images transmitted from the server <NUM>.

As shown in <FIG>, when an object allowing for connection to the images stored in the user terminal <NUM> is touched or clicked, the images stored in the user terminal <NUM> may be displayed in a matrix form below the garment display area. In addition, an area <NUM> in which an image can be displayed is displayed in a rectangular shape on the smart garment <NUM> displayed in the garment display area <NUM> so that the user can recognize where the image selected by the user is displayed on the smart garment <NUM>. The user may change a shape, size, or position of the area displayed on the smart garment <NUM> in the garment display area <NUM>.

As shown in <FIG>, when an image representing a flower is selected through a touch or click, the selected image is displayed on the smart garment <NUM> displayed in the garment display area <NUM>. In addition, the user terminal <NUM> transmits a signal including information for implementing the selected image on the smart garment <NUM> to the smart garment <NUM> so that the selected image is displayed on the smart garment <NUM>. As shown in <FIG>, when the image is selected, the user terminal <NUM> may directly forward the signal for implementing the image to the smart garment <NUM>, or may display a message requesting confirmation of the application of the selected image and forward the signal for implementing the image to the smart garment <NUM> when a confirmation command is input.

In addition, as shown in <FIG>, an object for driving the camera may also be displayed in the image selection area <NUM> so that an image directly captured by the camera of the user terminal <NUM> can be displayed on the smart garment <NUM>.

As shown in <FIG>, when the object for driving the camera of the user terminal <NUM> is touched or clicked, a camera installed in the user terminal <NUM> is driven so that the user can acquire a desired image through camera capturing. Once camera capturing is performed, a captured image may be displayed on the smart garment <NUM> displayed in the garment display area <NUM>. The user may adjust a position or size of the captured image by changing a shape, size, or position of the image display area displayed on the smart garment <NUM>. When the above adjustment is complete, the user terminal <NUM> transmits a signal including information for implementing the captured image on the smart garment <NUM> to the smart garment <NUM> so that the captured image is displayed on the smart garment <NUM>. As shown in <FIG>, when an image is captured and adjustment of a size or position of the image is complete, the user terminal <NUM> may directly forward a signal for implementing the captured image on the smart garment <NUM>, or may display a message requesting confirmation of application of the captured image and then forward the signal for implementing the image to the smart garment <NUM> when a confirmation command is received.

Meanwhile, the user may input text through the text input area <NUM> when the user intends to display text on the paired smart garment <NUM> or change existing text.

As shown in <FIG>, in the text input area <NUM>, a representation, such as <text input>, may be displayed that allows the user to know that a corresponding area is provided for text input. Alternatively, the text input area <NUM> may be displayed as a blank space without a separate guide.

When the user touches the text input area <NUM> or clicks the text input area <NUM> through a separate inputter, the user terminal <NUM> displays an area provided for selecting a color of text and a keyboard for inputting text, as shown in <FIG>, so that the user can input text of a desired color. In addition, an area <NUM> in which text can be displayed is displayed in a rectangular shape on the smart garment <NUM> displayed in the garment display area <NUM> so that the user can recognize where the image selected by the user is displayed on the smart garment <NUM>. The user may change a shape, size, or position of the text display area displayed on the smart garment <NUM> in the garment display area <NUM>.

In addition, although not illustrated in the drawings, a user interface for selecting a text font may be further displayed to allow the user to select a desired font.

When text is input and a color and font of the input text are selected, the input text is displayed on the smart garment <NUM> displayed in the garment display area <NUM>. Also, the user terminal <NUM> transmits a signal including information for implementing the input text on the smart garment <NUM> to the smart garment <NUM> so that the input text can be displayed on the smart garment <NUM>. As shown in <FIG>, when text is input, the user terminal <NUM> may directly forward a signal for displaying the text to the smart garment <NUM>, or may display a message requesting confirmation of application of the input text and then forward the signal for displaying the text to the smart garment <NUM> when a confirmation command is input.

Further, the text may be input through a keyboard or input via voice. The user may input text through the keyboard or via voice by application settings. An icon for guiding keyboard input of text and an icon for guiding voice input of text may be displayed in the text input area <NUM> so that the user can select a desired text input method by touching or clicking the icon for guiding the desired text input method. When the icon for guiding keyboard input is selected, the user interface shown in <FIG> may be displayed.

As described above, the design of the smart garment <NUM> may be changed through the user interface provided by the user terminal <NUM>, or the user terminal <NUM> may sense information of the surrounding environment and automatically change the design of the smart garment <NUM>, which will be described with reference to <FIG>.

As shown in <FIG>, the user terminal <NUM> may recognize a position of the user terminal <NUM> or detect a surrounding temperature or weather using a sensor mounted on the user terminal <NUM> or by utilizing Internet information or the like. The position, temperature, and weather are examples of environment information that the user terminal <NUM> can detect, but the present invention is not limited thereto.

For example, when a current position recognized by the user terminal <NUM> is a baseball field, the user terminal <NUM> may transmit a signal to the smart garment <NUM> such that a symbol of a team playing a game at the baseball field can be implemented on the smart garment <NUM>. The smart garment <NUM> may display the symbol of the team according to the signal transmitted from the user terminal <NUM>.

When a current temperature sensed by the user terminal <NUM> is more than <NUM>, the user terminal <NUM> may transmit a signal for changing a color of the current smart garment <NUM> to white to the smart garment <NUM>. The smart garment <NUM> may change the color thereof to white according to the signal transmitted from the user terminal <NUM>. When the color of the current smart garment <NUM> is already white, the smart garment <NUM> may not change the color.

In addition, when a current weather detected by the user terminal <NUM> is rainy weather, the user terminal <NUM> may transmit a signal for changing a pattern, a design, or an image currently displayed on the smart garment <NUM> to a raindrop image, design, or pattern to the smart garment <NUM>. The smart garment <NUM> may change the current pattern, design, or image thereof to the raindrop pattern, design, or image according to the signal transmitted from the user terminal <NUM>.

An application may provide a surrounding environment recognition mode that provides the above-described functions, and the user may activate the surrounding environment recognition mode to automatically cause the user terminal <NUM> to change the design of the smart garment <NUM>. Alternatively, the surrounding environment recognition mode may be usually turned off and optionally activated in a desired situation.

Meanwhile, the smart garment <NUM> according to the disclosed embodiment includes a fabric including color-changing fibers and ordinary fibers, which are materials for changing an image, text, or color according to a signal transmitted from the user terminal <NUM>, and the above-described connection module <NUM>. Hereinafter, the color-changing fibers constituting the smart garment <NUM> will be described in detail.

<FIG> are diagrams illustrating cholesteric liquid crystal fibers among the color-changing fibers of the smart garment <NUM> according to the disclosed embodiment.

As shown in <FIG>, cholesteric liquid crystal fiber <NUM> may have a circular or polygonal cross-section. As shown in <FIG>, the cholesteric liquid crystal fiber has a cholesteric liquid crystal <NUM> provided at the center of the fiber, a first electrode 412a formed on a part of an outer surface of the cholesteric liquid crystal, a second electrode 412b formed at an opposite surface of the first electrode, an insulator <NUM> provided between the first electrode and the second electrode, and a protective layer <NUM> covering the first electrode, the second electrode, and the insulator.

Cholesteric liquid crystals have bistability such that the cholesteric liquid crystals may be present in two stable states, such as a planar state in which light is reflected even when no voltage is applied to the cholesteric liquid crystals and a focal conic state in which light is scattered. The cholesteric liquid crystals may be converted into a homeotropic state in which light can be transmitted when a high voltage is applied thereto. Thus, when the design of the smart garment <NUM> is changed by the user terminal <NUM>, the changed design may be maintained without the application of voltage.

An inner electrode and an outer electrode may be transparent electrodes made of a transparent conductive material, and examples of the transparent conductive material may include indium tin oxide (ITO), indium zinc oxide (IZO), aluminum-doped zinc oxide (ZAO), a silver nano-wire (AgNW), and the like.

The protective layer covering the first electrode, the second electrode, and the insulator may be formed by coating ordinary textile fibers or fibers in a mesh form. By using ordinary textile fibers as the protective layer, a texture of ordinary textile fibers may be imparted to the cholesteric liquid crystal fiber. The first electrode and the second electrode are connected to the driver <NUM> of the connection module <NUM>, and the driver <NUM> changes the design of the smart garment <NUM> by applying a voltage to the first electrode and the second electrode according to a control signal of the processor <NUM>.

As shown in <FIG>, the cholesteric liquid crystal fiber may include a partition wall <NUM> for maintaining a shape of the fiber in the cholesteric liquid crystals. The partition wall may be formed by a polymer structure. In addition, as shown in <FIG>, the cholesteric liquid crystal fiber may be provided to have a polygonal cross-section, such as a quadrangular cross-section.

As shown in <FIG>, the above-described cholesteric liquid crystal fiber may be combined with an ordinary textile fiber <NUM> to form a color-changing fiber constituting the smart garment <NUM>. As shown in <FIG>, the cholesteric liquid crystal fiber and the ordinary textile fiber may be formed to have a twisted structure. A fabric of the smart garment <NUM> according to the disclosed embodiment may be formed by weaving color-changing fibers having a twisted form of cholesteric liquid crystal fibers and textile fibers.

In the case of the fabric woven with the color-changing fibers of the structure shown in <FIG>, the above-described first electrode and second electrode may not be formed on the cholesteric liquid crystal fiber, but the first electrode and the second electrode may be formed on one surface of the woven fabric and an opposite surface thereof.

In another embodiment, as shown in <FIG>, the fabric of the smart garment <NUM> may be formed by weaving the cholesteric liquid crystal fibers <NUM> and the ordinary textile fibers <NUM> in the form of a net. According to the present embodiment, unlike the embodiment shown in <FIG>, the fabric is formed by weaving the cholesteric liquid crystal fibers and the textile fibers in the form of a net without weaving the fabric using color-changing fibers having a twisted structure of cholesteric liquid crystal fibers and textile fibers.

<FIG> illustrates a structure of pixels P of a cholesteric liquid crystal fiber according to the disclosed embodiment. Referring to <FIG>, the cholesteric liquid crystal fiber has a structure in which red pixels reflecting one color of light, for example, red light, are arranged in a single layer. In this case, since one cholesteric liquid crystal fiber reflects one color, cholesteric liquid crystal fibers arranged in adjacent columns or in adjacent rows in the form shown in <FIG> may be provided to reflect different colors.

Alternatively, as shown in <FIG>, one pixel P constituting the cholesteric liquid crystal fiber may have a structure in which a red sub-cell <NUM> reflecting a wavelength band corresponding to red light, a green sub-cell <NUM> reflecting a wavelength band corresponding to green light, and a blue sub-cell <NUM> reflecting a wavelength band corresponding to blue light are stacked atop one another.

As shown in <FIG>, one pixel has a stacked structure, or, as shown in <FIG>, one pixel has a structure in which a red sub-cell reflecting a wavelength band corresponding to red light, a green sub-cell reflecting a wavelength band corresponding to green light, and a blue sub-cell reflecting a wavelength band corresponding to blue light are arranged in a single layer.

As shown in <FIG>, a grid <NUM> that separates each of sub-cells constituting one pixel is implemented by an ordinary textile fiber material so that cholesteric liquid crystal fibers may have a texture of textile fibers. The grid may be formed to have a height higher than the cholesteric liquid crystals, as shown in <FIG>, or may be formed at the same height as the cholesteric liquid crystals, as shown in <FIG>.

As shown in <FIG>, even when one pixel has a stacked structure, a grid separating each sub-cell is implemented by an ordinary textile fiber material so that cholesteric liquid crystal fibers may have a texture of textile fibers.

Meanwhile, when the smart garment <NUM>, for example, a T-shirt, is made, it is necessary to connect fabrics of a sleeve portion and a body portion. This connection may be made at a cholesteric liquid crystal fiber level or at a fabric level formed by cholesteric liquid crystal fibers. <FIG> and <FIG> illustrate a connection structure of the color-changing fiber and the fabric of the smart garment <NUM> according to the disclosed embodiment.

Referring to <FIG>, since the cholesteric liquid crystal fiber includes the first electrode and the second electrode to which a voltage is applied, as described above, when cholesteric liquid crystal fibers <NUM> are connected to each other, electrodes of the same polarity should be electrically connected. That is, first electrodes of the cholesteric liquid crystal fibers to be connected should be electrically connected to each other, and second electrodes should be electrically connected to each other. As shown in <FIG>, a connection portion <NUM> of the cholesteric liquid crystal fiber may include a first connection electrode 440a which electrically connects the first electrodes 412a of the cholesteric liquid crystal fibers, a second connection electrode 440b which electrically connects the second electrodes 412b of the cholesteric liquid crystal fibers, and an insulator provided between the first connection electrode and the second connection electrode. Additionally, an outer protective layer which may protect the connection portion may further included. A cross-section of the connection portion may be formed to be circular when a cross-section of the cholesteric liquid crystal fiber is circular, and the cross-section of the connection portion may be formed to be polygonal corresponding to the cross-section of the cholesteric liquid crystal fiber when the cross-section of the cholesteric liquid crystal fiber is polygonal.

In the case of the fabric woven with the color-changing fibers having a twisted structure shown in <FIG>, the first electrode and the second electrode are formed in the woven fabric, as described above. In this case, as shown in <FIG>, first electrodes of fabrics <NUM> to be connected should be electrically connected to each other, and second electrodes should be electrically connected to each other. As shown in <FIG>, a connection portion <NUM> of the fabric may include a first connection electrode 455a which connects the first electrodes 450a formed on top surfaces of the fabrics to be connected and a second connection electrode 455b which connects the second electrodes 450b formed on bottom surfaces of the fabrics to be connected. <FIG> illustrates a cross-section of the fabrics to be connected and the connection portion which connects the fabrics, and <FIG> illustrates the top surface. In <FIG>, outer electrodes illustrated by solid lines are the first connection electrodes and outer electrodes illustrated by dotted lines are the second connection electrodes.

As described above, the fabric of the smart garment <NUM> may be formed using the color-changing fibers having the twisted structure shown in <FIG>, or may be formed by weaving cholesteric liquid crystal fibers and ordinary textile fibers in the form of a net as shown in <FIG>. As another method, as shown in <FIG>, a flexible cholesteric liquid crystal in the form of a film may be used. <FIG> is a diagram illustrating a structure of the fabric of the smart garment <NUM> according to the disclosed embodiment.

As shown in <FIG>, the flexible cholesteric liquid crystal <NUM> may be formed into a net shape by forming holes in the form of a matrix in the flexible cholesteric liquid crystal and inserting an ordinary textile fiber <NUM> into a net eye, i.e., the hole, such that the fabric of the smart garment <NUM> is formed. Alternatively, as shown in <FIG>, textile fibers may be formed into a net shape by forming holes in the form of a matrix in the ordinary textile fibers and combining the flexible cholesteric liquid crystal <NUM> into a net eye, i.e., the hole, such that the fabric of the smart garment <NUM> is formed.

The cholesteric liquid crystal illustrated in <FIG> includes pixels of a stacked structure or pixels of a single layer structure, as described above. The cholesteric liquid crystals of <FIG> may be individually controlled for each line, and the cholesteric liquid crystals of <FIG> may also be individually controlled for each cholesteric liquid crystal forming the net eye.

<FIG> is a diagram illustrating a connection relationship of color-changing fibers and the connection module <NUM> for control of the color-changing fibers of the smart garment <NUM> according to the disclosed embodiment. As shown in <FIG>, one of a first electrode 430a-<NUM> and a second electrode 430a-<NUM> of a cholesteric liquid crystal fiber 430a as a first material and a second material that constitute a fabric may perform a role of a signal electrode, and the other may perform a role of a ground electrode. In the same manner, one of a third electrode 430b-<NUM> and a fourth electrode 430b-<NUM> may perform a role of a signal electrode, and the other may perform a role of a ground electrode. Since both the first material and the second material are cholesteric liquid crystal fibers, which are color-changing fibers, and the first electrode, the second electrode, the third electrode, and the fourth electrode perform the same function, the first electrode and the second electrode will be described as an example. For example, when the first electrode is the signal electrode and the second electrode is the ground electrode, the first electrodes of the cholesteric liquid crystal fibers are electrically connected to a signal terminal of the driver <NUM> of the connection module <NUM>, and the second electrodes are electrically connected to a ground terminal of the driver <NUM> of the connection module <NUM>. All the cholesteric liquid crystal fibers may be connected to one connection module <NUM>, or the cholesteric liquid crystal fibers may be controlled using a plurality of connection modules <NUM>.

The cholesteric liquid crystal fiber has been described above as a color-changing fiber for changing a design of the smart garment <NUM>.

<FIG> is a diagram illustrating electronic ink fibers among the color-changing fibers of the smart garment <NUM> according to an example not according to the claimed invention.

As shown in <FIG>, the electronic ink fabric may include a plurality of electronic ink capsules <NUM> containing electronic ink, a first electrode 470a formed on one surface of the electronic ink capsule, a second electrode 470b formed on an opposite surface of the first electrode, and an insulator (not shown) provided between the first electrode and the second electrode. In addition, although not illustrated in the drawings, a protective layer covering the first electrode, the second electrode, and the insulator may be further included.

The electronic ink capsules may contain at least one of a red electronic ink reflecting red light, a green electronic ink reflecting green light, a blue electronic ink reflecting blue light, a black electronic ink that absorbs light, and a white electronic ink that reflects light. For example, the red electronic ink, the black electronic ink, and the white electronic ink may be contained in one capsule, the green electronic ink, the black electronic ink, and the white electronic ink may be contained in one capsule, and the blue electronic ink, the black electronic ink, and the white electronic ink may be contained in one capsule.

An inner electrode and an outer electrode may be transparent electrodes made of a transparent conductive material, and examples of the transparent conductive material may include ITO, IZO, aluminum-doped ZAO, AgNW, and the like.

The protective layer covering the first electrode, the second electrode, and the insulator may be formed by coating ordinary textile fibers or fibers in a mesh form. By using ordinary textile fibers as the protective layer, a texture of the ordinary textile fibers may be imparted to the electronic ink fiber. The first electrode and the second electrode may be connected to the driver <NUM> of the connection module <NUM>, and the driver <NUM> may change the design of the smart garment <NUM> by applying a voltage to the first electrode and the second electrode according to the control signal of the processor <NUM>.

The fabric of the smart garment <NUM> according to the present embodiment may be formed by color-changing fibers having a twisted structure of the electronic ink fibers and the ordinary textile fibers, as in the embodiment using the cholesteric liquid crystal fibers, or may be formed by weaving the electronic ink fibers and the ordinary textile fibers in the form of a net. In the case of the fabric woven with the color-changing fibers having the twisted structure of the electronic ink fibers and the ordinary textile fibers, the above-described first electrode and second electrode may not be formed on the electronic ink fiber, but the first electrode and the second electrode may be formed on one surface of the woven fabric and an opposite surface.

Since the electronic ink also has bistability like the above-described cholesteric liquid crystal, power required for changing a design of the smart garment <NUM> may be minimized.

<FIG> is a diagram illustrating an electrochromic fiber among color-changing fibers of the smart garment <NUM> according to the example not according to the claimed invention.

As shown in <FIG>, the electrochromic fiber <NUM> may include a first electrode <NUM>, a counter electrode <NUM> provided outside the first electrode, an electrolyte <NUM> provided outside the counter electrode, a working electrode <NUM> provided outside the electrolyte, a second electrode <NUM> provided outside the working electrode, and a protective layer <NUM> provided to cover the second electrode. In addition, although not illustrated in the drawings, a partition wall for maintaining a shape of the fiber may be provided inside the electrochromic fiber. In the present example not according to the claimed invention, since the first electrode will be referred to as an inner electrode since it is provided inside the fiber, and the second electrode will be referred to as an outer electrode.

The inner electrode and the outer electrode may be transparent electrodes made of a transparent conductive material to which a voltage is applied from the driver <NUM> of the connection module <NUM>. Examples of the transparent conductive material may include ITO, IZO, aluminum-doped ZAO, AgNW, and the like.

The electrolyte may be a solid electrolyte or a liquid electrolyte, which is ionized and supplies a charge or ion to the inner electrode and the outer electrode when a voltage is applied thereto.

At least one of the working electrode and the counter electrode includes a color-changing material. For example, the working electrode may include a material that changes color as it is reduced, and the counter electrode may include a material that changes color as it is oxidized. Both the working electrode and the counter electrode may include the above-described color-changing material, or only one of the working and counter electrodes may include the above-described color-changing material while the other may include an ion-receiving electrode.

Typical reducing color-changing materials include WO3 and MoO3 TiO2, and oxidative color-changing materials include Ir(OH)x, Ni(OH)<NUM>, and Rh2O3. The electrochromic fiber may realize different red colors, green colors, and blue colors and combinations thereof in the color-changing material, and may be changed to a transparent state. The protective layer may be formed by coating ordinary textile fibers or fibers in a mesh form. By using ordinary textile fibers as the protective layer, a texture of the ordinary textile fiber may be imparted to the electrochromic fiber. The inner electrode and the outer electrode may be connected to the driver <NUM> of the connection module <NUM>, and the driver <NUM> may change the design of the smart garment <NUM> by applying a voltage to the first electrode and the second electrode according to a control signal of the processor <NUM>.

A fabric of the smart garment <NUM> according to the present example not according to the claimed invention may be formed by mixing electrochromic fibers and ordinary textile fibers, as in the embodiment using the cholesteric liquid crystal fabric. Since the electrochromic material also has bistability like the above-described cholesteric liquid crystal, power required for changing a design of the smart garment <NUM> may be minimized.

<FIG> is a diagram illustrating electroluminescent fibers among color-changing fibers of the smart garment <NUM> according to an example not according to the claimed invention.

The above-described cholesteric liquid crystal fibers, electronic ink fibers, and electrochromic fibers are reflective fibers, and electroluminescent fibers <NUM> shown in <FIG> are self-luminescent fibers. Thus, when a fabric of the smart garment <NUM> is formed using the electroluminescent fibers, the connection module <NUM> of the smart garment <NUM> includes the battery <NUM>.

As shown in <FIG>, the electroluminescent fibers may include a first electrode <NUM>, a luminescent material <NUM> provided outside the first electrode, a second electrode provided outside the luminescent material, and a protective layer <NUM> covering the second electrode. Each of the electroluminescent fibers may use a luminescent material that emits red, green, or blue light, and fibers using these different luminescent materials may be woven together with ordinary textile fibers to form the fabric of the smart garment <NUM>.

In the present example not according to the claimed invention, the first electrode will be referred to as an inner electrode since it is provided inside the fiber, and the second electrode will be referred to as an outer electrode.

In another example not according to the claimed invention, as shown in <FIG>, a material that emits white light is used as the luminescent material, and color filters 492a, 492b, and 492c, which transmit red light, green light, and blue light, respectively, may be attached to outer surfaces of the outer electrodes to form the electroluminescent fiber. At this time, as shown in <FIG>, the outer electrodes are spaced apart from each other, and the aforementioned color filters are attached respectively to the outer electrodes provided at a distance from each other. In this case, each of the outer electrodes may be individually controlled by the driver <NUM> of the connection module <NUM>. A partition wall for maintaining a shape of the fiber may be provided inside the luminescent material.

In still another example not according to the claimed invention, as shown in <FIG>, materials 495a, 495b, and 495c that emit red light, green light, and blue light, respectively, are used as the luminescent material, and an outer electrode is provided outside each of the materials to form the electroluminescent fiber. At this time, as shown in <FIG>, the outer electrodes may be spaced apart from each other, and may be individually controlled by the driver <NUM> of the connection module <NUM>.

In yet another example not according to the claimed invention, as shown in <FIG>, a core of the electroluminescent fiber is formed by an organic textile fiber <NUM>, and three inner electrodes spaced apart from each other are formed outside the textile fiber. In addition, materials 495a, 495b, and 495c, which emit red light, green light, and blue light, respectively, may be provided as luminescent materials formed outside of the inner electrodes, and outer electrodes may be provided respectively outside of the materials to form the electroluminescent fiber. In the present embodiment, inner and outer electrodes that apply voltages to different luminescent materials may be individually controlled by the driver <NUM> of the connection module <NUM>.

The inner electrode and the outer electrode are transparent electrodes made of a transparent conductive material. Examples of the transparent conductive material may include ITO, IZO, aluminum-doped ZAO, AgNW, and the like. The inner electrode and the outer electrode may be formed in a planar shape or in a linear shape.

A protective layer may be formed by coating ordinary textile fibers or fibers in a mesh form. By using ordinary textile fibers as the protective layer, a texture of the ordinary textile fibers may be imparted to the electroluminescent fiber. As described above, the inner electrode and the outer electrode may be connected to the driver <NUM> of the connection module <NUM>, and the driver <NUM> may change the design of the smart garment <NUM> by applying a voltage to the inner electrode and the outer electrode according to the control signal of the processor <NUM>.

Claim 1:
A smart garment comprising:
a first material comprising a first electrode and a second electrode;
a second material comprising a third electrode and a fourth electrode; and
a connection module comprising:
a communicator (<NUM>) configured to receive a signal including design information transmitted by a user terminal (<NUM>), the design information comprising at least one of a colour, image or text that is displayable on the smart garment,
a processor (<NUM>) configured to generate a control signal to change a design of the smart garment (<NUM>), according to the signal received by the communicator (<NUM>), and
a driver (<NUM>) connected to the first material and the second material and configured to apply a voltage to the first material and the second material according to the control signal generated by the processor (<NUM>) to change the design of the smart garment, the driver (<NUM>) comprising:
a first ground terminal configured to ground one of the first electrode and the second electrode,
a first signal terminal applying a voltage to an other one of the first electrode and the second electrode,
a second ground terminal configured to ground one of the third electrode and the fourth electrode, and
a second signal terminal applying a voltage to an other one of the third electrode and the fourth electrode,
wherein the first material and the second material comprise cholesteric liquid crystal fibres,
wherein the cholesteric liquid crystal comprises a pixel including at least one of a red sub-cell (<NUM>) configured to reflect red light, a green sub-cell (<NUM>) configured to reflect green light, and a blue sub-cell (<NUM>) configured to reflect blue light,
wherein the pixel is provided so that the red sub-cell (<NUM>), the green sub-cell (<NUM>), and the blue sub-cell (<NUM>) are formed to be coplanar or the red sub-cell (<NUM>), the green sub-cell (<NUM>), and the blue sub-cell (<NUM>) are formed to have a stacked structure, and
wherein the cholesteric liquid crystal comprises a grid provided to separate the red sub-cell (<NUM>), the green sub-cell (<NUM>), and the blue sub-cell (<NUM>), and the grid comprises textile fibres.