KR20150004193A - Image display device - Google Patents

Abstract

The present invention provides an image display device. The image display device includes a flexible display unit which is bent due to external force between a first state an a second state with different radiuses of curvatures, a pressing member which is arranged to face the flexible display unit and applies the external force to the flexible display unit by being bent, a driving unit which pulls both ends of the pressing member through a wire to bend the pressing member, and a tension control unit which is mounted on the pressing member, is connected to the wire, and controls the tension of the wire.

Description

IMAGE DISPLAY DEVICE [0002]

The present invention relates to an image display apparatus having a flexible display unit.

The video display device includes both a device for receiving and outputting a broadcast, a device for recording and reproducing video, and a device for recording and reproducing audio. Such a video display device includes, for example, a television, a monitor, a projector, a tablet, and the like.

As the functions of the video display device are diversified, the video display device is implemented in the form of a multimedia player having multiple functions such as photographing, video shooting, game, and broadcast reception in addition to the output of the broadcast and the playback of the video .

Various new attempts have been made in terms of hardware or software for supporting and increasing the function of such image display devices. Attempts at the hardware level include structural changes and improvements that simplify the assembly structure of the image display device.

As an example of the structural change and improvement, various studies and proposals have been actively made on a video display device having a flexible display part which is variable in shape. In order to realize a flexible structure of the flexible display portion, it is considered to use a wire. In such a variable structure, adjustment of the tension applied to the wire becomes important.

An object of the present invention is to provide a video display apparatus capable of adjusting the tension of a wire implementing a variable structure of a flexible display unit.

According to an aspect of the present invention, there is provided an image display apparatus including: a flexible display unit configured to be bent by an external force between a first state and a second state having different radii of curvature; And a driving unit disposed to face the flexible display unit and configured to apply the external force to the flexible display unit by warping and a driving unit configured to pull both ends of the pressing member such that the pressing member is bent.

According to an embodiment of the present invention, when the both ends are pulled by the driving unit, the pressing member is formed to slide on the back surface while pressing the back surface of the flexible display unit.

The image display apparatus may further include a support guide mounted on a back surface of the flexible display unit and disposed to cover a part of the pressing member to prevent buckling of the pressing member when both ends of the pressing member are pulled. The plurality of support guides may be disposed to be spaced apart from each other at a predetermined interval along the longitudinal direction of the pressing member.

According to another embodiment of the present invention, the driving unit pulls both end portions of the pressing member in the first direction to be switched from the first state to the second state, And both ends of the pressing member are pulled in a second direction different from the first direction.

The driving unit includes a driving unit having a driving shaft for rotating and a first wire connected to the pressing member and configured to be wound by rotation of the driving shaft to pull both ends of the pressing member in the first direction .

The driving shaft may have a first insertion hole into which the first wire is inserted, and the first wire may extend in both directions from the first insertion hole and be connected to the pressing member. The first insertion hole may be arranged to be parallel to the longitudinal direction of the pressing member in the first state.

The driving unit may further include a second wire connected to the pressing member and configured to pull both ends of the pressing member in the second direction.

The driving shaft may have a second insertion hole through which the second wire is inserted, and the first wire may extend in both directions from the second insertion hole to be connected to the pressing member. The first and second insertion holes may be formed at positions spaced apart from each other along the outer periphery of the drive shaft. In addition, the first and second insertion holes may be formed in directions perpendicular to each other.

When the drive shaft rotates at a predetermined angle in a direction in which the flexible display unit is switched from the first state to the second state, the first wire is wound on the drive shaft, and the second wire is wound on the drive shaft Lt; / RTI >

Wherein the first wire is connected to one surface of the pressing member so as to pull both ends of the pressing member in the first direction as the driving shaft rotates in the first rotating direction, The pressing member may be connected to the other surface of the pressing member so as to pull both ends of the pressing member in the second direction.

The pressing member may include a through hole through which the second wire extends so that the second wire extends from the drive shaft and extends to the other surface of the pressing member.

The driving unit may further include a reduction gear that connects the rotation shaft of the drive unit and the drive shaft.

According to another embodiment of the present invention, the driving unit includes a drive unit connected to the pinion, a rack unit configured to slide by the rotation of the pinion, and a rack unit configured to slide the pressing member in the first direction, And a first wire connected to the unit and the pressing member, respectively.

According to an embodiment of the present invention, the driving unit further includes a second wire connected to the rack unit and the pressing member, respectively, so as to pull the pressing member in a second direction different from the first direction.

The second wire may extend from the rack unit and be at least partially bent so as to penetrate the pressing member.

Wherein the rack unit includes a first rack and a second rack which are connected to the pinion and slid in mutually opposite directions in accordance with rotation of the pinion, and the first wire is opposite to the first rack at the ends of the first and second racks Lt; / RTI >

The first wire may be connected to one end of the first rack, and a second wire may be connected to the other end of the first rack to pull the pressing member in a second direction different from the first direction.

According to another aspect of the present invention, there is provided a flexible display apparatus including: a flexible display unit formed to be bent by an external force between a first state and a second state having different curvature radii; and a flexible display unit arranged to face the flexible display unit, A driving unit configured to pull both ends of the pressing member through the wire so that the pressing member is bent so as to apply the external force; and a driving unit mounted on the pressing member and connected to the wire to adjust the tension of the wire And a tension adjusting unit that adjusts the tension of the image.

According to an embodiment of the present invention, the tension adjusting unit includes a frame member formed of a different material from the pressing member and connected to the pressing member.

On one surface of the pressing member, a receiving groove is formed to be recessed toward the other surface, and at least a part of the frame member can be received in the receiving groove.

The length adjusting unit may include a length adjusting unit mounted on the frame member and formed to be changeable in length by rotation, and a length adjusting unit for adjusting the tension of the wire by changing the length of the length adjusting unit. And may further include a connecting member connected to each other.

The frame member may include a base portion accommodated in a receiving groove formed on one surface of the pressing member and a protrusion protruded from the base and having a through hole through which the wire passes, .

The length adjusting unit may include a first screw unit mounted on the frame member and a second screw unit screwed on the first screw unit and on which the connecting member is mounted.

The first screw unit and the second screw unit may each have a through hole through which the wire passes.

According to another embodiment of the present invention, the driving unit includes a driving unit that generates rotational force, and a first wire connected to the driving unit and configured to pull both ends of the pressing member in the first direction using the rotational force, And a second wire connected to the driving unit and configured to pull both ends of the pressing member in a second direction different from the first direction.

The tension adjusting unit may include a first tension adjusting unit and a second tension adjusting unit connected to the first and second wires, respectively.

Wherein the pressing member is disposed in parallel with the flexible display unit so as to press at least a portion of the flexible display unit when the both ends are pulled by the driving unit and the first and second tension adjusting units are disposed on at least one As shown in FIG.

The pressing member may be formed with a through-hole through which the second wire extends so that the second wire extends from the drive shaft and extends to the other surface of the pressing member.

According to the present invention having the above-described structure, when the tension of the wire is out of the setting value during production or during use of the product, the tension applied to the wire through the tension adjuster can be manually adjusted to the set value.

1 is a block diagram showing a video display device and a remote control device related to the present invention;
2 is a conceptual diagram showing a video display device according to an embodiment of the present invention;
3 is a conceptual view illustrating a structure for varying the shape of the flexible display unit shown in FIG.
Figures 4A and 4B are conceptual views of the structure of Figure 3, respectively, from the rear and front view.
5 is an enlarged view of a portion A shown in Fig.
FIG. 6 is an enlarged perspective view of the drive shaft portion shown in FIG. 4. FIG.
Fig. 7 is a conceptual view showing the first and second wires wound when the flexible display unit of Fig. 2 is switched and restored between the first state and the second state. Fig.
FIGS. 8A and 8B are conceptual diagrams showing the flexible display unit shown in FIG. 2 being placed in the first and second states, respectively.
9A and 9B are conceptual diagrams showing a mechanism in which tension of a wire is controlled by a tension adjusting unit.
10 is a sectional view of the frame member shown in Fig. 9A. Fig.
11 is a perspective view showing a structure for varying the shape of a flexible display unit in an image display apparatus according to another embodiment of the present invention.
12A and 12B are conceptual views of the structure of FIG. 11 as viewed from the back and front, respectively.
13A and 13B are conceptual diagrams each showing the flexible display unit shown in Fig. 11 being placed in the first and second states, respectively.

Hereinafter, a video display device according to the present invention will be described in detail with reference to the drawings.

In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. Furthermore, the singular < RTI ID = 0.0 > terms < / RTI > used herein include plural referents unless the context clearly dictates otherwise.

The video display device related to the present invention includes both a device for receiving and outputting a broadcast, a device for recording and reproducing video, and a device for recording and reproducing audio. Hereinafter, as an example of this, a television will be described as an example.

1 is a block diagram showing a video display device 100 and a remote control device 121a according to the present invention.

1, an image display apparatus 100 includes a tuner 110, a demodulating unit 111, an external device interface unit 122, a network interface unit 123, a storage unit 130, a user input interface unit A control unit 170, a flexible display unit 140, a driving unit 150, an audio output unit 160, a power supply unit 180, and a 3D viewing device 140a.

The tuner 110 selects a channel selected by the user or an RF broadcast signal corresponding to all previously stored channels among RF (Radio Frequency) broadcast signals received through the antenna. Also, the selected RF broadcast signal is converted into an intermediate frequency signal, a baseband image, or a voice signal.

For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF). If the selected RF broadcast signal is an analog broadcast signal, it is converted into an analog baseband image or voice signal (CVBS / SIF). That is, the tuner 110 can process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal (CVBS / SIF) output from the tuner 110 can be directly input to the controller 170.

Also, the tuner 110 can receive RF carrier signals of a single carrier according to an Advanced Television System Committee (ATSC) scheme or RF carriers of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme.

In the present invention, the tuner 110 sequentially selects RF broadcast signals of all broadcast channels stored through a channel memory function among RF broadcast signals received through an antenna, and converts the RF broadcast signals into an intermediate frequency signal, a baseband image, or a voice signal can do.

The demodulator 111 receives the digital IF signal DIF converted by the tuner 110 and performs a demodulation operation.

For example, when the digital IF signal output from the tuner 110 is the ATSC scheme, the demodulator 111 performs 8-VSB (8-Vestigal Side Band) demodulation. In addition, the demodulation unit 111 may perform channel decoding. For this, the demodulator 111 includes a Trellis decoder, a de-interleaver, and a Reed Solomon decoder to perform trellis decoding, deinterleaving, Decryption can be performed.

For example, when the digital IF signal output from the tuner 110 is a DVB scheme, the demodulator 111 performs COFDMA (Coded Orthogonal Frequency Division Modulation) demodulation. In addition, the demodulation unit 111 may perform channel decoding. To this end, the demodulator 111 may include a convolution decoder, a deinterleaver, a Reed-Solomon decoder, and the like to perform convolutional decoding, deinterleaving, and reed solomon decoding.

The demodulation unit 111 may perform demodulation and channel decoding and then output a stream signal TS. At this time, the stream signal may be a signal in which a video signal, a voice signal, or a data signal is multiplexed. For example, the stream signal may be an MPEG-2 TS (Transport Stream) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, or the like. Specifically, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

Meanwhile, the demodulating unit 111 may be separately provided according to the ATSC scheme and the DVB scheme. That is, the ATSC demodulation unit and the DVB demodulation unit can be provided.

The stream signal output from the demodulation unit 111 may be input to the control unit 170. The control unit 170 performs demultiplexing, video / audio signal processing, and the like, and then outputs the video to the flexible display unit 140 and audio to the audio output unit 160.

The external device interface unit 122 can connect the external device and the video display device 100. [ To this end, the external device interface unit 122 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The external device interface unit 122 may be connected to an external device such as a DVD (Digital Versatile Disk), a Blu ray, a game device, a camera, a camcorder, a computer (notebook) The external device interface unit 122 transmits external video, audio, or data signals to the controller 170 of the video display device 100 through a connected external device. Also, the control unit 170 can output the processed video, audio, or data signal to the connected external device. To this end, the external device interface unit 122 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The A / V input / output unit includes a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, an S-video terminal (analog), a DVI Digital Visual Interface) terminal, an HDMI (High Definition Multimedia Interface) terminal, an RGB terminal, a D-SUB terminal, and the like.

The wireless communication unit can perform short-range wireless communication with other electronic devices. The video display device 100 is connected to other electronic devices in accordance with communication standards such as Bluetooth, Radio Frequency Identification (RFID), IrDA (Infrared Data Association), UWB (Ultra Wideband), ZigBee, Can be connected.

Also, the external device interface unit 122 may be connected to the various set-top boxes via at least one of the various terminals described above to perform input / output operations with the set-top box.

Meanwhile, the external device interface unit 122 can transmit and receive data to and from the 3D viewing apparatus 140a.

The network interface unit 123 provides an interface for connecting the video display device 100 to a wired / wireless network including the Internet network. The network interface unit 123 may include an Ethernet terminal or the like for connection to a wired network and may be a WLAN (Wireless LAN, Wi-Fi), a Wibro (wireless broadband) , World Interoperability for Microwave Access (Wimax), and HSDPA (High Speed Downlink Packet Access) communication standards.

The network interface unit 123 can receive, via the network, contents or data provided by the Internet or a content provider or a network operator. That is, it can receive contents such as movies, advertisements, games, VOD, broadcasting signals, and the like, provided from a contents provider through a network. In addition, the update information and the update file of the firmware provided by the network operator can be received. It may also transmit data to the Internet or a content provider or network operator.

The network interface unit 123 is connected to, for example, an IP (Internet Protocol) TV and receives video, audio, or data signals processed in the settop box for IPTV to enable bidirectional communication, And can transmit the signals processed by the controller 170 to the IPTV set-top box.

The IPTV may include ADSL-TV, VDSL-TV, FTTH-TV and the like depending on the type of the transmission network. The IPTV may include a TV over DSL, a video over DSL, a TV over IP ), And the like. In addition, IPTV may also mean an Internet TV capable of accessing the Internet, or a full browsing TV.

The storage unit 130 may store a program for each signal processing and control in the control unit 170, and may store signal-processed video, audio, or data signals.

In addition, the storage unit 130 may perform a function for temporarily storing video, audio, or data signals input to the external device interface unit 122. [ In addition, the storage unit 130 may store information on a predetermined broadcast channel through a channel memory function such as a channel map.

The storage unit 130 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory) RAM, ROM (EEPROM, etc.), and the like. The image display apparatus 100 may reproduce and provide a file (a moving image file, a still image file, a music file, a document file, etc.) stored in the storage unit 130 to a user.

FIG. 1 shows an embodiment in which the storage unit 130 is provided separately from the controller 170, but the scope of the present invention is not limited thereto. The storage unit 130 may be included in the controller 170.

The user input interface unit 121 transmits a signal input by the user to the controller 170 or a signal from the controller 170 to the user.

For example, the user input interface unit 121 may be configured to turn on / off the power, select the channel, and set the screen from the remote control device 121a according to various communication methods such as a radio frequency (RF) communication method and an infrared Or may transmit a signal from the controller 170 to the remote controller 121a.

Also, for example, the user input interface unit 121 may transmit a user input signal input from a local key (not shown) such as a power key, a channel key, a volume key, and a set value to the controller 170.

For example, the user input interface unit 121 may transmit a user input signal input from a sensing unit (not shown) that senses a user's gesture to the control unit 170 or may sense a signal from the control unit 170 (Not shown). Here, the sensing unit (not shown) may include a touch sensor, a voice sensor, a position sensor, an operation sensor, and the like.

The control unit 170 demultiplexes the input stream or processes the demultiplexed signals through the tuner 110 or the demodulation unit 111 or the external device interface unit 122 to output a signal for video or audio output Can be generated and output.

The video signal processed by the controller 170 is input to the flexible display unit 140 and can be displayed as an image corresponding to the video signal. In addition, the image signal processed by the controller 170 may be input to the external output device through the external device interface 122.

The audio signal processed by the control unit 170 may be output to the audio output unit 160 as an audio signal. The audio signal processed by the control unit 170 may be input to the external output device through the external device interface unit 122. Although not shown in FIG. 1, the controller 170 may include a demultiplexer, an image processor, and the like.

In addition, the control unit 170 can control the overall operation of the image display apparatus 100. For example, the controller 170 controls the tuner 110 to control the tuner 110 to select an RF broadcast corresponding to a channel selected by the user or a previously stored channel.

The control unit 170 may control the image display apparatus 100 according to a user command or an internal program input through the user input interface unit 121. [

For example, the controller 170 controls the tuner 110 so that a signal of a selected channel is input according to a predetermined channel selection command received through the user input interface unit 121. Then, video, audio, or data signals of the selected channel are processed. The control unit 170 may output the video or audio signal processed by the user through the flexible display unit 140 or the audio output unit 160.

For example, the control unit 170 may control the operation of the external device via the external device interface unit 122, for example, a camera or a camcorder, through the external device interface unit 122, So that the video signal or the audio signal can be outputted through the flexible display unit 140 or the audio output unit 160.

Meanwhile, the control unit 170 may control the flexible display unit 140 to display an image. For example, the broadcast image input through the tuner 110, the external input image input through the external device interface unit 122, the image input through the network interface unit 123, or the image stored in the storage unit 130 To be displayed on the flexible display unit 140.

At this time, the image displayed on the flexible display unit 140 may be a still image or a moving image, and may be a 2D image or a 3D image.

On the other hand, the control unit 170 generates a 3D object for a predetermined object among the images displayed on the flexible display unit 140, and displays the 3D object. For example, the object may be at least one of a connected web screen (newspaper, magazine, etc.), an EPG (Electronic Program Guide), various menus, widgets, icons, still images, moving images and text.

The 3D object may be processed to have a depth different from that of the image displayed on the flexible display unit 140. The 3D object may be processed so as to be protruded compared to the image displayed on the flexible display unit 140. [

On the other hand, the control unit 170 recognizes the position of the user based on the image photographed from the photographing unit (not shown). For example, the distance (z-axis coordinate) between the user and the image display apparatus 100 can be grasped. In addition, the x-axis coordinate and the y-axis coordinate in the video display device 100 corresponding to the user position can be grasped.

Although not shown in the drawing, a channel browsing processing unit for generating a channel signal or a thumbnail image corresponding to an external input signal may be further provided. The channel browsing processing unit receives the stream signal TS output from the demodulation unit 111 or the stream signal output from the external device interface unit 122 and extracts an image from an input stream signal to generate a thumbnail image have. The generated thumbnail image may be directly or encoded and input to the controller 170. In addition, the generated thumbnail image may be encoded in a stream format and input to the controller 170. The control unit 170 may display a thumbnail list having a plurality of thumbnail images on the flexible display unit 140 using the input thumbnail images. At this time, the thumbnail list may be displayed in a simple viewing mode displayed on a part of the area in a state where a predetermined image is displayed on the flexible display unit 140, or in a full viewing mode displayed in most areas of the flexible display unit 140 have.

The flexible display unit 140 converts a video signal, a data signal, an OSD signal, a control signal processed by the control unit 170 or a video signal, a data signal, and a control signal received from the external device interface unit 122, .

In the present invention, it is exemplified that the flexible display unit 140 is configured to be deformable into a flat shape or a curved shape. When the flexible display unit 140 is transformed into a curved shape as if it surrounds a user on the front side, a realistic image quality and immersion can be provided to the user. Such a flexible display can be implemented, for example, by an OLED panel.

The flexible display unit 140 may be configured to provide a three-dimensional image to the user. The flexible display unit 140 may be divided into an additional display mode and a single display mode for three-dimensional video viewing.

In the single display method, a 3D image can be implemented by the flexible display unit 140 alone without using a separate 3D viewing apparatus 140a, for example, 3D glasses, and examples thereof include a lenticular system, a parallax barrier parallax barrier) can be applied.

In addition, the additional display method can implement a 3D image using the 3D viewing apparatus 140a in addition to the flexible display unit 140. For example, various methods such as a head mount display (HMD) type and a glasses type can be applied have. In addition, the glasses type can be further divided into a passive type such as a polarizing glasses type and an active type such as a shutter glass type. On the other hand, head-mounted display type can be divided into a passive type and an active type.

Meanwhile, the flexible display unit 140 may include a touch screen and may be used as an input device in addition to the output device.

The driving unit 150 is formed to deform the flexible display unit 140 into a flat shape or a curved shape. The driving unit 150 may be configured to deform the flexible display unit 140 by applying a physical force to the flexible display unit 140 directly or indirectly.

The audio output unit 160 receives a voice processed signal, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal from the control unit 170, and outputs the voice. The audio output unit 160 may be implemented by various types of speakers.

In order to detect a user's gesture, a sensing unit (not shown) having at least one of a touch sensor, a voice sensor, a position sensor, and an operation sensor may be further provided in the image display apparatus 100 have. A signal sensed by a sensing unit (not shown) is transmitted to the controller 170 through the user input interface unit 121.

The control unit 170 may sense the gesture of the user by combining the images captured from the photographing unit (not shown) or the sensed signals from the sensing unit (not shown).

The power supply unit 190 supplies corresponding power to the video display device 100. Particularly, a control unit 170, which can be implemented as a system on chip (SOC), a flexible display unit 140 for video display, and an audio output unit 160 for audio output . Further, according to the embodiment, power can be supplied to the heat generating portion including the heat ray.

The remote control device 121a transmits the user input to the user input interface unit 121. [ To this end, the remote controller 121a can use infrared (IR) communication, radio frequency (RF) communication, Bluetooth, ultra wideband (UWB), or ZigBee. Also, the remote controller 121a can receive the video, audio, or data signal output from the user input interface unit 121 and display it or output it by the remote controller 121a.

The video display device 100 described above is a fixed type and is a digital broadcast of ATSC system (8-VSB system), digital broadcast of DVB-T system (COFDM system), digital broadcast of ISDB-T system (BST- And may be a digital broadcast receiver capable of receiving at least one. In addition, as a portable type, digital terrestrial DMB broadcasting, satellite DMB broadcasting, ATSC-M / H broadcasting, DVB-H broadcasting (COFDM broadcasting), MediaFoward Link Only And a digital broadcasting receiver capable of receiving at least one of digital broadcasting and the like. It may also be a digital broadcast receiver for cable, satellite communications, or IPTV.

Meanwhile, the video display device described in this specification includes a TV receiver, a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player) .

Meanwhile, the block diagram of the image display apparatus 100 shown in FIG. 1 is a block diagram for an embodiment of the present invention. Each component of the block diagram may be integrated, added, or omitted according to the specifications of the image display apparatus 100 actually implemented. That is, two or more constituent elements may be combined into one constituent element, or one constituent element may be constituted by two or more constituent elements, if necessary. In addition, the functions performed in each block are intended to illustrate the embodiments of the present invention, and the specific operations and apparatuses do not limit the scope of the present invention.

FIG. 2 is a conceptual view showing an image display apparatus 100 according to an embodiment of the present invention, and FIG. 3 is a conceptual view illustrating a structure for varying the shape of the flexible display unit 140 shown in FIG.

Referring to FIGS. 2 and 3, the flexible display unit 140 is formed to be bent by an external force between a first state and a second state having different radii of curvature. For example, the first state may be a flat display state of the flexible display unit 140, and the second state may be a state where the flexible display unit 140 is curved in a curved shape.

When the flexible display unit 140 receives an external force and is bent so as to surround the user on the front face, a realistic image quality and immersion can be provided to the user. The flexible display unit 140 bent in a curved shape can be restored to a flat state by an external force.

The flexible display unit 140 includes a panel 141 and a support member 142 for supporting the panel 141. [ The support member 142 is configured to be deformable together with the panel 141 so as to cover the back surface of the panel 141. The panel 141 is a flexible panel (e.g., an OLED panel). The support member 142 is preferably made of a material capable of being subjected to a predetermined elastic deformation (for example, stainless steel, titanium, carbon fiber, or the like).

The image display apparatus 100 includes a pressing member 160 and a driving unit 150 for deforming the flexible display unit 140 so that the flexible display unit 140 can be warped.

The pressing member 160 is arranged to face the flexible display unit 140 and applies an external force to the flexible display unit 140 due to warping. As shown in FIG. 2, the pressing member 160 may be formed as a bar-shaped plate extending in the width direction of the support member 142. It is preferable that a plurality of pressing members 160 are provided for stable driving. For example, the plurality of pressing members 160 may be disposed at both ends of the support member 142 in the longitudinal direction, respectively.

The driving unit 150 is configured to pull both ends of the pressing member 160 so that the pressing member 160 is bent. When both ends of the pressing member 160 are pulled by the driving unit 150, the pressing member 160 is bent and presses the flexible display unit 140. According to the above mechanism, the flexible display unit 140 which is in a flat state can be curved in a curved shape.

The driving unit 150 pulls both end portions of the pressing member 160 in the first direction so that the flexible display unit 140 is switched from the flat state to the bent state, In a second direction different from the first direction. Accordingly, the shape of the flexible display unit 140 can be changed in a flat state or in a bent state according to a direction in which the driving unit 150 pulls both ends of the pressing member 160. [

The pressing member 160 may be disposed in parallel with the flexible display unit 140 and may press at least a portion of the flexible display unit 140 when the both ends are pulled by the driving unit 150. For example, the support member 142 may be configured to be pressed by the both end portions of the drawn pressing member 160 and to bend together with the panel 141.

Both end portions of the pressing member 160 may be disposed in contact with the support member 142, or may be spaced apart at a predetermined interval. Both ends of the urging member 160 slide on the back surface of the supporting member 142 while pressing the supporting member 142. As a result, Both ends of the pressing member 160 may be slidably coupled to the supporting member 142 by a sliding member 165 having a rail structure.

Fig. 4A and Fig. 4B are conceptual views of the structure of Fig. 3 viewed from the back and front, respectively. Fig. 5 is an enlarged view of the portion A shown in Fig. 3, and Fig. 6 is an enlarged view of the portion of the drive shaft 153b shown in Fig. This is a perspective view. 7 is a conceptual view showing a state in which the first and second wires 151 and 152 are wound when the flexible display unit 140 of FIG. 2 is switched and restored between the first state and the second state, And 8b are conceptual diagrams showing a state in which the flexible display unit 140 shown in FIG. 2 is placed in the first and second states, respectively.

4 to 8B, the driving unit 150 includes a driving unit 153 and a first wire 151.

The drive unit 153 is coupled to the pressure member 160 and the support member 142 so as to fix the pressure member 160 on the back surface of the support member 142. The drive unit 153 is preferably mounted at a central portion of the pressing member 160 so as to apply a uniform force to both ends of the pressing member 160. [

The drive unit 153 has a drive shaft 153b that rotates and the drive shaft 153b is configured to be rotatable in both directions, i.e., the first and second rotation directions. The first rotation direction is a direction in which the first wire 151 is wound so that the flexible display unit 140 is switched from the first state to the second state, Is a direction in which the second wire 152 is wound so that the flexible display unit 140 is restored from the second state to the first state.

The drive shaft 153b may include a drive shaft splitter 153f formed so as to divide the first wire 151 and the second wire 152 into a winding region. The drive shaft splitter 153f is formed so as to protrude along the outer circumferential surface of the drive shaft 153b to divide the drive shaft 153b into the first and second regions 153g and 153h. The first wire 151 and the second wire 152 are wound around the first and second regions 153g and 153h with the drive shaft 153b therebetween. Can be prevented.

A reduction gear 153c may be disposed between the rotation shaft 153a of the drive unit 153 and the drive shaft 153b. The rotation speed of the drive shaft 153b can be appropriately lowered by the reduction gear 153c and the rotational force can be increased.

The first wire 151 is connected to the urging member 160 and is formed to be wound by the rotation of the driving shaft 153b so as to pull both ends of the urging member 160 in the first direction. The first wire 151 is preferably made of a material having a low elongation so as not to be stretched due to tension.

The first wire 151 is inserted into the first insertion hole 153d formed in the driving shaft 153b and extends in both directions from the first insertion hole 153d to be connected to both ends of the pressing member 160. [ The first insertion hole 153d may be arranged to be parallel to the longitudinal direction of the pressing member 160 in the first state, wherein the first wire 151 is made to have an initial tension. That is, the first wire 151 is tensioned so as not to bend the pressing member 160 while being connected to both ends of the pressing member 160 in a taut state.

When the driving shaft 153b is rotated in the first rotation direction in the first state, the first wire 151 is wound on the driving shaft 153b and both ends of the pressing member 160 connected to the first wire 151 are pulled So that the flexible display unit 140 is pressed. According to the above-described mechanism, the flexible display unit 140 in the first state is switched to the second state.

The driving unit 150 is connected to the pressing member 160 so that the flexible display unit 140 in the second state can be restored to the first state. Two wires 152 may be further included. The second wire 152 is inserted into the second insertion hole 153e formed in the driving shaft 153b and extends in both directions from the second insertion hole 153e to be connected to both ends of the pressing member 160. [ The second wire 152 is preferably formed of a material having a low elongation such that the second wire 152 does not stretch due to tensile force like the first wire 151.

Also, the second wire 152 is made to have an initial tension in the first state. That is, the second wire 152 is tensioned so as not to warp the pressing member 160 while being connected to both ends of the pressing member 160 in a taut state.

The first insertion hole 153d and the second insertion hole 153e are formed at positions spaced apart from each other along the outer periphery of the drive shaft 153b. For example, the first insertion hole 153d and the second insertion hole 153e may be formed in directions perpendicular to each other. The first insertion hole 153d and the second insertion hole 153e may be formed in the first and second regions 153g and 153h, respectively, which are divided by the drive shaft splitter 153f.

When the drive shaft 153b is rotated by a predetermined angle in the first rotation direction in which the flexible display unit 140 is switched from the first state to the second state, the first wire 151 is driven by the drive shaft 153b, And the second wire 152 is wound to the drive shaft 153b. That is, the tension is applied to the first wire 151, so that both ends of the pressing member 160 are pulled by the first wire 151 in the first direction. On the other hand, the tension is reduced on the second wire 152 and is not pulled in the second direction.

Conversely, when the drive shaft 153b rotates at a predetermined angle in the second rotation direction in which the flexible display unit 140 is switched from the second state to the first state, the second wire 152 is wound on the drive shaft 153b , And the first wire 151 is configured to be released relative to the drive shaft 153b. That is, the tension is increased on the relatively loosened second wire 152, so that both ends of the pressing member 160 are pulled in the second direction by the second wire 152. Accordingly, the pressing force is released and the flexible display unit 140 is restored to the first state. On the other hand, the initial tension is applied to the first wire 151 because the tension is reduced.

The second wire 152 may be set to be wound on the drive shaft 153b at least once more in the second rotation direction when the flexible display unit 140 is placed in the first state. The second wire 152 is loosened with respect to the drive shaft 153b by the number of times it is wound on the drive shaft 153b so that the rotation range of the drive shaft 153b is Can be set more widely.

Structurally, the first wire 151 is connected to one surface of the urging member 160 so as to pull both ends of the urging member 160 in the first direction as the driving shaft 153b rotates in the first rotation direction. A through hole 160a through which the second wire 152 penetrates is formed in the pressing member 160 so that the second wire 152 extends from the driving shaft 153b and extends to the other surface of the pressing member 160. [ The second wire 152 extending to the other surface through the through hole 160a is connected to the other surface of the urging member 160 so that the both ends of the urging member 160 In a second direction different from the first direction.

On the other hand, the support member 142 may be provided with a support guide 166 arranged to cover a part of the pressing member 160 so as to prevent buckling of the pressing member 160 when both ends of the pressing member 160 are pulled have. A plurality of support guides 166 may be provided and spaced apart at regular intervals along the longitudinal direction of the pressing member 160.

FIGS. 9A and 9B are conceptual diagrams showing a mechanism in which the tension of the wire is controlled by the tension adjusting unit 261, and FIG. 10 is a sectional view of the frame member 262 shown in FIG. 9A.

The structure described below can be applied to at least one of the first and second wires 151 and 152 described above. Hereinafter, the tension adjusting unit 261 is configured to adjust the tension of the first wire 251 as an example.

9A to 10, the tension adjusting unit 261 is mounted on the pressing member 260 and is connected to the first wire 251 to adjust the tension of the first wire 251. The tension applied to the first wire 251 is manually adjusted to the set value when the tension of the first wire 151 is out of the set value by the tension adjusting unit 261 during product production or during use. .

The tension adjusting portion 261 includes a frame member 262, a length adjusting unit 263, and a connecting member 264.

The frame member 262 is mounted on the pressing member 260 to provide a space in which the length adjusting unit 263 is installed. The frame member 262 may be formed of a different material from the pressing member 260. For example, the pressing member 260 may be formed of a material having high rigidity (e.g., a composite material such as CFRP) so that the pressing member 260 has a high elastic force so that it can be warped and restored and can be uniformly bent. On the other hand, the frame member 262 may be formed of a material (for example, a metal material such as stainless steel) having a certain level of elasticity and rigidity and being relatively easy to process.

The length adjusting unit 263 is mounted on the frame member 262 and is formed so that the length thereof is changeable. This figure shows an example in which the length adjusting unit 263 is provided with first and second screw units 263a and 263b configured to be capable of changing the length by rotation. As shown, the first screw unit 263a is mounted to the frame member 262 and the second screw unit 263b is screwed to the first screw unit 263a, 263a. ≪ / RTI >

The first screw unit 263a and the second screw unit 263b may be formed with through holes through which the first wire 251 passes. Further, the second screw unit 263b may be provided with an operation portion 263c in the form of a groove or a projection.

The connecting member 264 is connected to the second screw unit 263b and the first wire 251 so as to adjust the tension of the first wire 251 by changing the length. The connecting member 264 may be formed in the form of a sleeve for receiving and fixing the end of the first wire 251.

On one side of the pressing member 260, a receiving groove 260b is formed to be recessed toward the other side, and at least a part of the frame member 262 can be received in the receiving groove 260b. As shown, the frame member 262 may include a base portion 262a and a protrusion 262b. The base portion 262a is accommodated in a receiving groove 260b formed on one surface of the pressing member 260 and the protruding portion 262b protrudes from the base portion 262a to define a space in which the first screw unit 263a is mounted . A through hole 262d through which the wire passes may be formed in the protruding portion 262b. A thread 262c may be formed on the inner surface of the frame forming the space in which the first screw unit 263a is mounted so that the first screw unit 263a can be screwed.

Referring to the previous embodiment, the tension adjusting unit may include a first tension adjusting unit and a second tension adjusting unit connected to the first and second wires 151 and 152, respectively. At this time, the first and second tension adjusting portions may be mounted on at least one of the first surface and the second surface of the frame member 162.

The first wire 151 is disposed to pass over one surface of the pressing member 160 and the second wire 152 extends to the other surface of the pressing member 160 through the through hole 160a. The second wire 152 is preferably mounted on the opposite side of the surface on which the first wire 151 is mounted in order to pull both ends of the pressing member 160 in the second direction when the second wire 152 is wound Do. In the foregoing embodiment, the first tension adjusting portion is mounted on one surface of the frame member 162 and the second tension adjusting portion is mounted on the other surface of the frame member 162. [

11A and 11B are perspective views showing a structure for varying the shape of the flexible display unit 340 in the video display device 300 according to another embodiment of the present invention. FIGS. 12A and 12B are views showing the structure of FIG. FIGS. 13A and 13B are conceptual diagrams showing the flexible display unit 340 shown in FIG. 11 in a state in which the flexible display unit 340 is placed in the first and second states, respectively.

11 to 13B, a driving unit 350 according to another embodiment of the present invention includes a driving unit 353, a rack unit 354, and a first wire 351.

The drive unit 353 is connected to the pinion 353b. The pinion 353b is configured to be rotatable in both directions, i.e., the first and second rotational directions. In this figure, it is seen that the pinion 353b is rotatably mounted on the plate 353d disposed on the pressing member 360. [

A reduction gear 353c can be connected between the rotary shaft 353a of the drive unit 353 and the rotary shaft of the pinion 353b. The rotation speed of the pinion 353b can be suitably lowered by the reduction gear 353c and the rotational force can be increased. In this figure, the plate 353d is arranged so as to cover at least a part of the reduction gear 353c, and the space for installing the pinion 353b and the rack unit 354 is provided.

The rack unit 354 is configured to slide by the rotation of the pinion 353b. In this figure, a rack unit 354 is shown slidably mounted on the plate 353d. The plate 353d and the rack unit 354 are provided with a rail structure that enables the sliding movement of the rack unit 354.

The rack unit 354 includes a first rack 354a and a second rack 354b which are connected to the pinion 353b and configured to be movable in opposite directions in accordance with the rotation of the pinion 353b. The first and second racks 354a and 354b are disposed parallel to the pressing member 360 with the pinion 353 interposed therebetween so that one end and the other end of the pressing member 360 are rotated by the rotation of the pinion 353b Respectively.

The first wires 351 extend in opposite directions to each other at the ends of the first rack 354a and the second rack 354b and are connected to both ends of the pressing member 360, respectively. The first wire 351 connected to the first rack 354a is connected to one end of the adjacent pressing member 360 and the first wire 351 connected to the second rack 354b is connected to one end of the adjacent pressing member 360. [ (Not shown). The rack unit 354 may be provided with fixing members 355a and 355b for fixing the first and second wires 351 and 352. In the figure, the first and second wires 351 and 352 are fixed and fixed to fixing members 355a and 355b formed in a bar shape.

According to this structure, when the pinion 353b is rotated in the first rotation direction, the rack unit 354 is slid in a direction away from the end of the pressing member 360 to which the first wire 351 is connected. Accordingly, the first wire 351 is pulled, and both end portions of the pressing member 360 connected to the first wire 351 are pulled in the first direction and bent in a curved shape. According to such a mechanism, the flexible display portion 340 is pressed by the pressing member 360 to be switched from the first state to the second state.

The driving unit 350 includes a second wire 352 for pulling the pressing member 360 in a second direction different from the first direction so that the flexible display unit 340 can be restored to the first state again from the second state .

The second wire 352 is connected to the rack unit 354 and the pressing member 360, respectively. Specifically, a first wire 351 is connected to one end of the first rack 354a and a second wire 352 is connected to the other end of the first rack 354a to pull the pressing member 360 in the second direction . At this time, the second wire 352 extends from the rack unit 354 and is at least partially bent so as to penetrate the pressing member 360, and the bent second wire 352 passes through the pressing member 360 And is connected to the other end of the pressing member 360 and connected to the end.

The first wire 351 is connected to one surface of the pressing member 360 so as to pull both ends of the pressing member 360 in the first direction and the second wire 352 connects both ends of the pressing member 360 in the second direction To the other surface of the pressing member 360 so as to pull it out.

According to this structure, when the pinion 353b is rotated in the second rotational direction in the second state, the rack unit 354 is slid in a direction away from the end of the pressing member 360 to which the second wire 352 is connected . Thus, the second wire 352 is pulled, and both end portions of the pressing member 360 connected to the second wire 352 are pulled in the second direction to be restored to a flat state.

In accordance with such a mechanism, the pressing force applied to both ends of the flexible display unit 340 is released and restored to a flat state. In this case, when the pressing member 360 is slidably coupled to the flexible display unit 340, the flexible display unit 340 coupled with the pressing member 360 in the process of restoring the pressing member 360, Can be restored to a flat state by receiving the restoring force.

The above-described image display device is not limited to the configuration and the method of the embodiments described above, but all or a part of the embodiments may be selectively combined so that various modifications may be made to the embodiments.

Claims (11)

A flexible display unit formed to be bent by an external force between a first state and a second state having different radii of curvature;
A pressing member arranged to face the flexible display unit and applying the external force to the flexible display unit by warping;
A driving unit configured to pull both ends of the pressing member through the wire so that the pressing member is bent; And
And a tension adjusting unit mounted on the pressing member and connected to the wire to adjust tension of the wire. The method according to claim 1,
Wherein the tension adjusting unit comprises a frame member formed of a different material from the pressing member and connected to the pressing member. 3. The method of claim 2,
Wherein one surface of the pressing member is formed with a receiving recess which is recessed toward the other surface,
And at least a part of the frame member is received in the receiving groove. 3. The method of claim 2,
The tension adjusting unit may include:
A length adjusting unit mounted on the frame member, the length adjusting unit being formed to be changeable in length by rotation; And
And a connecting member connected to the length adjusting unit and the wire so that the tension of the wire is adjusted by changing the length of the length adjusting unit. 5. The method of claim 4,
The frame member includes:
A base portion accommodated in a receiving groove formed on one surface of the pressing member; And
And a protrusion protruding from the base and having the through hole through which the wire passes, the protrusion being mounted with the length adjusting unit. 5. The method of claim 4,
The length-
A first screw unit mounted on the frame member; And
And a second screw unit screwed to the first screw unit and to which the connecting member is mounted. The method according to claim 6,
Wherein the first screw unit and the second screw unit are each formed with a through hole through which the wire passes. The method according to claim 1,
The driving unit includes:
A drive unit for generating a rotational force; And
A first wire connected to the driving unit and configured to pull both ends of the pressing member in a first direction using the rotational force; And
And a second wire connected to the driving unit and configured to pull both ends of the pressing member in a second direction different from the first direction. 9. The method of claim 8,
Wherein the tension adjusting unit includes a first tension adjusting unit and a second tension adjusting unit connected to the first wire and the second wire, respectively. 10. The method of claim 9,
Wherein the pressing member is disposed in parallel with the flexible display unit so as to press at least a part of the flexible display unit when both ends are pulled by the driving unit,
Wherein the first and second tension adjusting portions are mounted on at least one of the one surface and the other surface of the pressing member. 11. The method of claim 10,
Wherein the pressing member is formed with a through hole through which the second wire extends so that the second wire extends from the driving shaft and extends to the other surface of the pressing member.

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