KR20120000848A - Apparatus for viewing 3d image - Google Patents

Abstract

PURPOSE: A 3D image viewing device is provided to reduce crosstalk by using active left or right eye polarization units and passive left or right eye polarization units together. CONSTITUTION: A 3D viewing device(195) includes a left eye glass unit(240) and a right eye glass unit(260). The left eye glass unit includes an active left eye polarization unit, a passive left eye polarization unit, and a left eye glass. The active left eye polarization unit is polarized according to an electric signal. A passive left eye polarization unit is polarized in specific direction. The right eye glass unit includes an active right eye polarization unit, a passive right eye polarization unit, and a right eye glass. The active right eye polarization unit is polarized according to the electric signal. The passive right eye polarization unit is polarized in a specific direction.

Description

3D viewing device {Apparatus for viewing 3D image}

The present invention relates to a 3D viewing apparatus, and more particularly to a 3D viewing apparatus capable of reducing cross talk.

The image display device is a device having a function of displaying an image that a user can watch. The user can watch the broadcast through the image display device. A video display device displays a broadcast selected by a user among broadcast signals transmitted from a broadcast station on a display. Currently, broadcasting is shifting from analog broadcasting to digital broadcasting worldwide.

Digital broadcasting refers to broadcasting for transmitting digital video and audio signals. Digital broadcasting is more resistant to external noise than analog broadcasting, so it has less data loss, is advantageous for error correction, has a higher resolution, and provides a clearer picture. In addition, unlike analog broadcasting, digital broadcasting is capable of bidirectional services.

Recently, various studies on stereoscopic images have been conducted, and stereoscopic imaging techniques are becoming more and more common and practical in computer graphics as well as in various other environments and technologies.

An object of the present invention is to provide a 3D viewing device that can reduce cross talk.

3D viewing apparatus according to an embodiment of the present invention for achieving the above object, the left eye glass portion having an active left eye polarizer polarized in accordance with an applied electrical signal and a passive left eye polarizer and a left eye glass polarized in a predetermined direction, And a right eye polarizing unit including an active right eye polarizing unit polarized according to an applied electric signal, a passive right eye polarizing unit polarizing in a predetermined direction, and a right eye glass.

In addition, the 3D viewing apparatus according to an embodiment of the present invention for achieving the above object, according to the passive left eye polarizer polarized in the first direction, and while the left eye image frame is displayed in the image display device, according to the applied electric signal The active left eye polarizer is polarized in the same first direction as the passive left eye polarizer, the passive right eye polarizer is polarized in the second direction, and while the right eye image frame is displayed on the image display device, And an active right eye polarizer that is polarized in the same second direction as the passive right eye polarizer.

According to an embodiment of the present invention, by using an active left eye or right eye polarizer polarized according to an electrical signal and a passive left eye or right eye polarizer polarized in a predetermined direction, it is possible to improve the light leakage effect when viewing 3D images. Therefore, cross talk can be reduced.

In particular, each of the active left eye or right eye polarizers may include a liquid crystal between both electrodes, and accordingly, the liquid crystals are arranged in a corresponding direction according to the input voltage, thereby enabling active polarization.

1 is a diagram illustrating a 3D viewing apparatus and an image display apparatus according to an exemplary embodiment of the present invention.
FIG. 2 is a view schematically illustrating the structure of the 3D viewing apparatus of FIG. 1.
3 to 6 are views referred to for describing the operation of the 3D viewing apparatus of FIG. 1.
FIG. 7 is a block diagram illustrating the image display apparatus of FIG. 1.
FIG. 8 is an internal block diagram of the 3D viewing apparatus and the image display apparatus of FIG. 1.
FIG. 9 is an internal block diagram of the controller of FIG. 7.
10 is a diagram illustrating various formats of 3D video.
11 is a diagram illustrating an operation of a 3D viewing apparatus according to a frame sequential format.
12 is a view for explaining that images are formed by a left eye image and a right eye image.
FIG. 13 illustrates a depth of a 3D image according to a distance between a left eye image and a right eye image.
14 is a diagram illustrating an example of a 3D image display.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

The suffixes "module" and "unit" for components used in the following description are merely given in consideration of ease of preparation of the present specification, and do not impart any particular meaning or role by themselves. Therefore, the "module" and "unit" may be used interchangeably.

1 is a diagram illustrating a 3D viewing apparatus and an image display apparatus according to an exemplary embodiment of the present invention, and FIG. 2 is a diagram briefly illustrating a structure of the 3D viewing apparatus of FIG. 1.

3 to 6 are views referred to for describing the operation of the 3D viewing apparatus of FIG. 1.

Referring to FIG. 1, the 3D viewing apparatus 195 according to an embodiment of the present invention may include a switch 218, a wireless communication unit 230, a left eye glass unit 240, and a right eye glass unit 260. . In addition, a control unit (not shown) may be further provided.

The switch 218 is used to turn on or off the operation of the 3D viewing apparatus 195. In particular, it is used to turn on or off the operating power supply.

The wireless communication unit 230 performs wireless communication with the image display apparatus 100. For example, when the synchronization signal is output from the image display apparatus 100, it may be received. In accordance with the synchronization signal, opening and closing operations of the left eye glass unit 240 and the right eye glass unit 260 are controlled. The operation of the wireless communication unit 230 will be described later with reference to FIG. 8.

As illustrated in FIG. 2, the left eye glass unit 240 may include an active left eye polarizer 245 polarized according to an applied electric signal and a passive left eye polarizer 255 polarized in a predetermined direction. In addition, the left eye glass 250 may be further provided.

The left eye glass 250 may be disposed between the active left eye polarizer 245 and the passive left eye polarizer 255, but is not limited thereto and may be variously disposed. For example, it may be arranged after the order of the active left eye polarizer 245 and the passive left eye polarizer 255. On the other hand, the left eye glass 250 may be formed integrally with the active left eye polarizer 245 or the passive left eye polarizer 255.

As illustrated in FIG. 2, the right eye glass unit 260 may include an active right eye polarizer 265 polarized according to an applied electric signal and a passive right eye polarizer 275 polarized in a predetermined direction. In addition, the right eye glass 270 may be further provided.

The right eye glass 270 may be disposed between the active right eye polarizer 265 and the passive right eye polarizer 275, but is not limited thereto and may be variously disposed. For example, it may be arranged after the order of the active right eye polarizer 265 and the passive right eye polarizer 275. On the other hand, the right eye glass 270 may be formed integrally with the active right eye polarizer 265 or the passive right eye polarizer 275.

3 to 5, the polarization direction of the active left eye polarizer 245 and the active right eye polarizer 265 may vary according to a voltage applied thereto.

3, when the driving voltage VthL is applied to the active left eye polarizer 245 during the first period t1, that is, as the 3D image is displayed as the 3D image in the image display apparatus 100. The active left eye polarizer 245 is operated so that the active left eye polarizer 245 is polarized in the first direction as shown in FIG. 4.

On the other hand, when the voltage OV lower than the driving voltage VthL is applied to the active right eye polarizer 265 during the first period t1, as shown in FIG. 4, the active right eye polarizer 265 does not operate. Therefore, polarization in a specific direction (second direction) is not performed.

In addition, as shown in FIG. 3, the driving voltage VthR is applied to the active right eye polarizer 265 during the second period t2, that is, while the right eye image frame is displayed as the 3D image in the image display apparatus 100. In this case, the active right eye polarizer 265 is operated so that the active right eye polarizer 265 is polarized in the second direction as shown in FIG. 5. In this case, the second direction may be a direction that is different from the first direction and is perpendicular to each other. By orthogonal, the corresponding light enters the left and right eyes independently of each other.

On the other hand, when the voltage OV lower than the driving voltage VthR is applied to the active left eye polarizer 245 during the second period t2, as shown in FIG. 5, the active left eye polarizer 245 does not operate. Therefore, polarization in a specific direction (first direction) is not performed.

As a result, during the first period t1, the active left eye polarizer 245 is polarized in the first direction, and the first direction becomes the same direction as the passive left eye polarizer 255.

According to an exemplary embodiment of the present invention, two left eye polarizers 245 and 255 are provided, so that the light passing through the active left eye polarizer 245 is not polarized correctly in the first direction. This cannot finally pass through the passive left eye polarizer 255. As a result, the light leakage phenomenon does not occur as compared with the case where the active left eye polarizer 245 is used alone, and thus crosstalk does not occur.

In addition, during the second period t2, the active right eye polarizer 265 is polarized in the second direction, and the second direction becomes the same direction as the passive right eye polarizer 275.

According to the exemplary embodiment of the present invention, two right eye polarizers 265 and 275 are provided, so that the light passing through the active right eye polarizer 265 is not polarized correctly in the second direction. The passive right eye polarizer 275 is not finally passed through. As a result, light leakage does not occur as compared with the case where the active right eye polarizer 265 is used alone, and thus crosstalk does not occur.

Meanwhile, the driving voltage VthL applied to the active left eye polarizer 245 during the first period t1 is the driving voltage VthR applied to the active right eye polarizer 265 during the second period t2. Is preferred. This is due to the different polarization directions. This will be described with reference to FIG. 6.

Referring to FIG. 6, the active left eye polarizer 245 is disposed between the first electrode 247 and the second electrode 248 spaced apart from each other, and the first electrode 247 and the second electrode 248. The liquid crystal 249 may be provided.

The active right eye polarizer 265 includes a first electrode 267 and a second electrode 268 spaced apart from each other, and a liquid crystal 269 disposed between the first electrode 267 and the second electrode 268. It may be provided.

6 (a), when the driving voltage VthL is applied to the active left eye polarizer 245 during the first period t1, that is, the potential difference between the first electrode 247 and the second electrode 248. When the driving voltage VthL becomes the driving voltage VthL, it can be seen that the liquid crystals 269 are arranged in the first direction so that polarization is performed. Accordingly, the corresponding light is incident to the left eye.

On the other hand, when the voltage OV having a level lower than the driving voltage VthL is applied to the active right eye polarizer 265 during the first period t1, the arrangement of the liquid crystals 269 is not aligned as described above. As a result, the corresponding light is not incident to the right eye.

Referring to FIG. 6B, when the driving voltage VthR is applied to the active right eye polarizer 265 during the second period t2, that is, the potential difference between the first electrode 267 and the second electrode 268. When the driving voltage VthR becomes the driving voltage VthR, it can be seen that the liquid crystals 269 are arranged in the second direction so that polarization is performed. Accordingly, the corresponding light is incident to the right eye.

On the other hand, when the voltage OV having a level lower than the driving voltage VthR is applied to the active left eye polarizer 245 during the second period t2, the arrangement of the liquid crystals 249 is not aligned as described above. Thus, the corresponding light is not incident to the left eye.

The active left eye polarizer 245 or the active right eye polarizer 265 described above may be any one of a twisted nematic (TN) method, a vertical alignment (VA) method, an in-place-switching (IPS) method, and the like. Accordingly, the liquid crystal can be driven.

FIG. 7 is a block diagram illustrating the image display apparatus of FIG. 1.

Referring to FIG. 7, the image display device 100 according to an exemplary embodiment of the present invention includes a tuner 110, a demodulator 120, an external device interface unit 130, a network interface unit 135, and a storage unit ( 140, a user input interface unit 150, a controller unit 170, a display unit 180, an audio output unit 185, a power supply unit 190, a 3D viewing device 195, and a wireless communication unit 198. Can be.

The tuner 110 selects an RF broadcast signal corresponding to a channel selected by a user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through an 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 may process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal CVBS / SIF output from the tuner 110 may 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.

Meanwhile, 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 them into intermediate frequency signals or baseband video or audio signals. I can convert it.

The demodulator 120 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 120 performs an 8-VSB (8-Vestigal Side Band) demodulation. Also, the demodulation unit 120 may perform channel decoding. To this end, the demodulator 120 includes a trellis decoder, a de-interleaver, and a reed solomon decoder to perform trellis decoding, deinterleaving, Solomon decoding can be performed.

For example, when the digital IF signal output from the tuner 110 is a DVB scheme, the demodulator 120 performs COFDMA (Coded Orthogonal Frequency Division Modulation) demodulation. Also, the demodulation unit 120 may perform channel decoding. For this, the demodulator 120 may include a convolution decoder, a deinterleaver, and a reed-solomon decoder to perform convolutional decoding, deinterleaving, and reed solomon decoding.

The demodulation unit 120 may perform demodulation and channel decoding, and then output a stream signal TS. In this case, the stream signal may be a signal multiplexed with a video signal, an audio signal, or a data signal. 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.

On the other hand, the demodulator 120 described above can be provided separately according to the ATSC system and the DVB system. That is, it can be provided as an ATSC demodulation unit and a DVB demodulation unit.

The stream signal output from the demodulator 120 may be input to the controller 170. After performing demultiplexing, image / audio signal processing, and the like, the controller 170 outputs an image to the display 180 and outputs audio to the audio output unit 185.

The external device interface unit 130 may transmit or receive data with the external device. To this end, the external device interface unit 130 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The external device interface unit 130 may be connected to an external device such as a digital versatile disk (DVD), a Blu-ray, a game device, a camera, a camcorder, a computer (laptop), or the like by wire / wireless. The external device interface unit 130 transmits an image, audio or data signal input from the outside to the controller 170 of the image display device 100 through a connected external device. In addition, the controller 170 may output an image, audio, or data signal processed by the controller 170 to a connected external device. To this end, the external device interface unit 130 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), and a DVI so that video and audio signals of an external device can be input to the video display device 100. (Digital Visual Interface) terminal, HDMI (High Definition Multimedia Interface) terminal, RGB terminal, D-SUB terminal and the like.

The wireless communication unit can perform short-range wireless communication with other electronic devices. The image display apparatus 100 may communicate with Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and Digital Living Network Alliance (DLNA). Depending on the specification, it can be networked with other electronic devices.

In addition, the external device interface unit 130 may be connected through at least one of the various set top boxes and the various terminals described above to perform input / output operations with the set top box.

In the drawing, although the wireless communication unit 198 transmits and receives data to and from the 3D viewing device 195, the present invention is not limited thereto, and the external device interface unit 130 or the user input interface unit 150 may display the 3D viewing device. It is also possible to transmit and receive data with the 195.

The network interface unit 135 provides an interface for connecting the image display apparatus 100 to a wired / wireless network including an internet network. The network interface unit 135 may include an Ethernet terminal for connection with a wired network, and for connection with a wireless network, a WLAN (Wi-Fi) or a Wibro (Wireless). Broadband, Wimax (World Interoperability for Microwave Access), High Speed Downlink Packet Access (HSDPA) communication standards, and the like may be used.

The network interface unit 135 may receive content or data provided by the Internet or a content provider or a network operator through a network. That is, content such as a movie, an advertisement, a game, a VOD, a broadcast signal, and related information provided from a content provider may be received 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 content provider or network operator.

In addition, the network interface unit 135 is connected to, for example, an Internet Protocol (IP) TV, and receives the video, audio, or data signals processed in the set-top box for the IPTV to enable bidirectional communication. The signal processed by the controller 170 may be transmitted to the set-top box for the IPTV.

Meanwhile, the above-described IPTV may mean ADSL-TV, VDSL-TV, FTTH-TV, etc. according to the type of transmission network, and include TV over DSL, Video over DSL, TV overIP (TVIP), and Broadband TV ( BTV) and the like. In addition, IPTV may also mean an Internet TV capable of accessing the Internet, or a full browsing TV.

The storage 140 may store a program for processing and controlling each signal in the controller 170, or may store a signal-processed video, audio, or data signal.

In addition, the storage unit 140 may perform a function for temporarily storing an image, audio, or data signal input to the external device interface unit 130. In addition, the storage 140 may store information on a predetermined broadcast channel through a channel storage function such as a channel map.

The storage unit 140 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), It may include at least one type of storage medium such as RAM, ROM (EEPROM, etc.). The image display apparatus 100 may reproduce and provide a file (video file, still image file, music file, document file, etc.) stored in the storage 140 to a user.

7 illustrates an embodiment in which the storage unit 140 is provided separately from the control unit 170, but the scope of the present invention is not limited thereto. The storage 140 may be included in the controller 170.

The user input interface unit 150 transmits a signal input by the user to the control unit 170 or a signal from the control unit 170 to the user.

For example, the user input interface unit 150 may be powered on / off, channel selection, and screen from the remote controller 200 according to various communication methods such as a radio frequency (RF) communication method and an infrared (IR) communication method. A user input signal such as a setting may be received, or a signal from the controller 170 may be transmitted to the remote controller 200.

In addition, for example, the user input interface unit 150 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.

In addition, for example, the user input interface unit 150 may transmit a user input signal input from a sensing unit (not shown) that senses a user's gesture to the controller 170 or may transmit a signal from the controller 170. The transmission may be transmitted to a sensing unit (not shown). Here, the sensing unit (not shown) may include a touch sensor, an audio sensor, a position sensor, an operation sensor, and the like.

The controller 170 demultiplexes the input stream or processes the demultiplexed signals through the tuner 110, the demodulator 120, or the external device interface unit 130, and outputs a video or audio signal. You can create and output.

The image signal processed by the controller 170 may be input to the display 180 and displayed as an image corresponding to the image signal. In addition, the image signal processed by the controller 170 may be input to the external output device through the external device interface unit 130.

The voice signal processed by the controller 170 may be sound output to the audio output unit 185. In addition, the voice signal processed by the controller 170 may be input to the external output device through the external device interface unit 130.

Although not shown in FIG. 7, the controller 170 may include a demultiplexer, an image processor, and the like. This will be described later with reference to FIG. 9.

In addition, the controller 170 may control overall operations of the image display apparatus 100. For example, the controller 170 may control the tuner 110 to control the tuner 110 to select an RF broadcast corresponding to a channel selected by a user or a pre-stored channel.

In addition, the controller 170 may control the image display apparatus 100 by a user command or an internal program input through the user input interface unit 150.

For example, the controller 170 controls the tuner 110 to input a signal of a selected channel according to a predetermined channel selection command received through the user input interface unit 150. Then, video, audio, or data signals of the selected channel are processed. The controller 170 may output the channel information selected by the user together with the processed video or audio signal through the display 180 or the audio output unit 185.

As another example, the controller 170 may, for example, receive an external device image playback command received through the user input interface unit 150, from an external device input through the external device interface unit 130, for example, a camera or a camcorder. The video signal or the audio signal may be output through the display 180 or the audio output unit 185.

The controller 170 may control the display 180 to display an image. For example, a broadcast image input through the tuner 110, an external input image input through the external device interface unit 130, or an image input through the network interface unit 135 or an image stored in the storage unit 140. May be controlled to be displayed on the display 180.

In this case, the image displayed on the display 180 may be a still image or a video, and may be a 2D image or a 3D image.

Meanwhile, the controller 170 may generate and display a 3D object with respect to a predetermined object in the image displayed on the display 180. 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, videos, and text.

Such a 3D object may be processed to have a different depth than the image displayed on the display 180. [ Preferably, the 3D object may be processed to appear protruding from the image displayed on the display 180.

The controller 170 may recognize a location of a user based on an image photographed by a photographing unit (not shown). For example, the distance (z-axis coordinate) between the user and the image display apparatus 100 may be determined. In addition, the x-axis coordinates and the y-axis coordinates in the display 180 corresponding to the user position may be determined.

On the other hand, although not shown in the figure, it may be further provided with a channel browsing processing unit for generating a thumbnail image corresponding to the channel signal or the external input signal. The channel browsing processor may receive a stream signal TS output from the demodulator 120 or a stream signal output from the external device interface 130, extract a video from the input stream signal, and generate a thumbnail image. Can be. The generated thumbnail image may be input as it is or encoded to the controller 170. In addition, the generated thumbnail image may be encoded in a stream form and input to the controller 170. The controller 170 may display a thumbnail list including a plurality of thumbnail images on the display 180 by using the input thumbnail image. In this case, the thumbnail list may be displayed in a simple viewing manner displayed in a partial region while a predetermined image is displayed on the display 180 or in an overall viewing manner displayed in most regions of the display 180. The thumbnail images in the thumbnail list may be updated sequentially.

The display 180 converts an image signal, a data signal, an OSD signal, a control signal, or an image signal, a data signal, a control signal received from the external device interface unit 130 processed by the controller 170, and generates a driving signal. Create

The display 180 may be a PDP, an LCD, an OLED, a flexible display, or the like, and in particular, according to an embodiment of the present invention, it is preferable that a 3D display is possible.

The display 180 may be divided into an additional display method and a single display method for viewing a 3D image.

The independent display method may implement a 3D image by the display 180 alone without additional display, for example, glasses, and the like, for example, a lenticular method, a parallax barrier, or the like. Various methods can be applied.

Meanwhile, the additional display method may implement a 3D image by using an additional display in addition to the display 180. For example, various methods such as a head mounted display (HMD) type and glasses type may be applied. In addition, the spectacles type can be further divided into a passive scheme such as a polarized glasses type and an active scheme such as a shutter glass type. On the other hand, the head mounted display type can be divided into passive and active methods.

In the embodiment of the present invention, a 3D viewing device 195 is provided for viewing 3D video. The 3D viewing apparatus 195 according to an embodiment of the present invention belongs to the above-described additional display method and is a hybrid method in which an active method (with an active polarizer) and a passive method (with a passive polarizer) are combined. . This is as described above.

The display 180 may be configured as a touch screen and used as an input device in addition to the output device.

The audio output unit 185 receives a signal processed by the controller 170, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs a voice signal. The voice output unit 185 may be implemented by various types of speakers.

Meanwhile, in order to detect a gesture of a user, as described above, a sensing unit (not shown) including at least one of a touch sensor, a voice sensor, a position sensor, and a motion sensor may be further provided in the image display apparatus 100. have. The signal detected by the sensing unit (not shown) is transmitted to the controller 170 through the user input interface unit 150.

The controller 170 may detect a gesture of the user by combining or combining the image photographed by the photographing unit (not shown) or the detected signal from the sensing unit (not shown).

The power supply unit 190 supplies the corresponding power throughout the image display apparatus 100. In particular, power may be supplied to the controller 170, which may be implemented in the form of a System On Chip (SOC), a display 180 for displaying an image, and an audio output unit 185 for audio output. have.

The wireless communication unit 198 transmits and receives data with the 3D viewing apparatus 195. In relation to an embodiment of the present invention, the synchronization signal may be transmitted to the 3D viewing apparatus 195. For example, the left eye glass unit 240 and the right eye glass unit 260 of the 3D viewing device 195 are synchronized with the left eye image frame and the right eye image frame sequentially displayed on the display 180 of the image display apparatus 100. May be transmitted from the wireless communication unit 198.

The wireless communication unit 198 may transmit or receive a pairing signal for synchronization with the 3D viewing apparatus 195.

The remote control apparatus 200 transmits the user input to the user input interface unit 150. To this end, the remote control apparatus 200 can use Bluetooth, RF (radio frequency) communication, infrared (IR) communication, UWB (Ultra Wideband), ZigBee, or the like. In addition, the remote control apparatus 200 may receive an image, an audio or a data signal output from the user input interface unit 150, and display or output the audio from the remote control apparatus 200.

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

On the other hand, the video display device described in the present specification is a TV receiver, a mobile phone, a smart phone (notebook computer), a digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), etc. May be included.

Meanwhile, a block diagram of the image display device 100 shown in FIG. 7 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 that is 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.

Hereinafter, the image display apparatus 100 according to the embodiment of the present invention is capable of a three-dimensional display, and will be described based on a liquid crystal display panel (LCD panel) based display that requires a separate backlight unit.

8 is an internal block diagram of the 3D viewing apparatus and the image display apparatus of FIG. 1.

Referring to FIG. 8, the 3D viewing apparatus 195 may include a power supply unit 210, a switch 218, a control unit 220, a wireless communication unit 230, a left eye glass unit 240, and a right eye glass unit 260. It may include.

The power supply unit 210 supplies power to the left eye glass portion 240 and the right eye glass portion 260. 3 to 5, the driving voltage VthL is applied to the left eye glass part 240, and the driving voltage VthR is applied to the right eye glass part 260. Accordingly, each of the left eye glass portion 240 and the right eye glass portion 260 is opened.

The driving voltage VthL and the driving voltage VthR are preferably alternately supplied at different periods, and may be at different levels so that the polarization directions are different.

The power supply unit 210 may supply operation power for the operation of the control unit 220 and the wireless communication unit 230 in the 3D viewing apparatus 195.

The switch 218 turns on or off the operating power of the 3D viewing apparatus 195 according to the user's operation. When the switch 218 is turned on, the power supply unit 210 operates to supply the corresponding power to the control unit 220, the wireless communication unit 230, the left eye glass unit 240, and the right eye glass unit 260. .

The controller 220 may include a left eye image frame and a right eye image frame displayed on the display 180 of the image display apparatus 100, and a left eye glass unit 240 and a right eye glass unit 260 of the 3D viewing apparatus 195. It can be controlled to open and close in synchronization. In this case, the left eye glass unit 240 and the right eye glass unit 260 may be opened and closed in synchronization with the synchronization signal received from the wireless communication unit 198.

In addition, the controller 220 may control operations of the power supply unit 210 and the wireless communication unit 230. When the switch 218 is turned on, the controller 220 may control the power supply 210 to operate to supply power to each component.

The controller 220 may control the wireless communication unit 230 to pay the pairing signal to the image display apparatus 100 for paying with the image display apparatus 100. Alternatively, the pairing signal may be received from the image display apparatus 100.

The wireless communication unit 230 may transmit or receive data with the wireless communication unit 198 of the image display apparatus 100 using the image display apparatus 100 and the IR (InfraRed) or RF (Radio Frequency) scheme. Can be. In particular, a synchronization signal for opening and closing the left eye glass 240 and the right eye glass 260 may be received from the wireless communication unit 198 of the image display apparatus 100. In accordance with the synchronization signal, opening and closing operations of the left eye glass unit 240 and the right eye glass unit 260 are controlled.

The wireless communication unit 230 may transmit or receive a pairing signal with the video display device 100. In addition, it is also possible to transmit a signal whether the 3D viewing apparatus 195 is used to the image display apparatus 100.

As described above with reference to FIG. 7, the image display apparatus 100 may include a wireless communication unit 198, a controller 170, a display 180, and the like. Hereinafter, the operation with the 3D viewing apparatus 195 will be described.

The wireless communication unit 198 in the video display device 100 may transmit a synchronization signal to the 3D viewing device 195. For example, the left eye glass unit 240 and the right eye glass unit 260 of the 3D viewing device 195 are synchronized with the left eye image frame and the right eye image frame sequentially displayed on the display 180 of the image display apparatus 100. May be transmitted from the wireless communication unit 198.

The controller 170 controls the wireless communication unit 198 to output the corresponding synchronization signal in accordance with the left eye image frame and the right eye image frame sequentially displayed on the display 180. The controller 170 controls the wireless communication unit 198 to transmit or receive a pairing signal for pairing with the 3D viewing apparatus 195.

FIG. 9 is an internal block diagram of the controller of FIG. 7, FIG. 10 is a diagram illustrating various formats of a 3D image, and FIG. 11 is a diagram illustrating an operation of a 3D viewing apparatus according to a frame sequential format.

Referring to the drawings, the controller 170 of the image display apparatus 100 includes a demultiplexer 410, an image processor 420, an OSD generator 440, a mixer 445, and a frame rate converter ( 450, and a formatter 460. In addition, the apparatus may further include a voice processor (not shown) and a data processor (not shown).

The demultiplexer 410 demultiplexes an input stream. For example, when an MPEG-2 TS is input, it may be demultiplexed and separated into video, audio, and data signals, respectively. Here, the stream signal input to the demultiplexer 410 may be a stream signal output from the tuner 110, the demodulator 120, or the external device interface unit 130.

The image processor 420 may perform image processing of the demultiplexed image signal. To this end, the image processor 420 may include an image decoder 425 and a scaler 435.

The image decoder 425 decodes the demultiplexed image signal, and the scaler 435 performs scaling to output the resolution of the decoded image signal on the display 180.

The video decoder 425 may include decoders of various standards.

For example, when the demultiplexed video signal is an encoded 2D video signal of MPEG-2 standard, it may be decoded by an MPEG-2 decoder.

Also, for example, the demultiplexed 2D video signal is a digital video broadcasting (DMB) method or a video signal of H.264 standard according to DVB-H, or a depth video of MPEC-C part 3 , Multi-view video according to Multi-view Video Coding (MVC) or free-view video according to Free-viewpoint TV (TV), respectively, decoded by H.264 decoder, MPEC-C decoder, MVC decoder or FTV decoder Can be.

Meanwhile, the image signal decoded by the image processor 420 may be classified into a case in which only a 2D image signal is present, a case in which a 2D image signal and a 3D image signal are mixed, and a case in which only a 3D image signal exists.

The image processor 420 may detect whether the demultiplexed video signal is a 2D video signal or a 3D video signal. Whether the image is a 3D image signal may be detected based on a broadcast signal received from the tuner 110, an external input signal from an external device, or an external input signal received through a network. In particular, whether the 3D video signal is a 3D video signal may be determined by referring to a 3D video flag, 3D video metadata, or 3D video format information in the header of the stream. You can judge.

The image signal decoded by the image processor 420 may be a 3D image signal having various formats. For example, the image may be a 3D image signal including a color image and a depth image, or may be a 3D image signal including a plurality of view image signals. The plurality of viewpoint image signals may include, for example, a left eye image signal and a right eye image signal.

Here, the format of the 3D video signal is a side by side format (FIG. 10A) in which the left eye video signal L and the right eye video signal R are arranged left and right, as shown in FIG. Top / Down format (FIG. 10B) to arrange, Frame Sequential format (FIG. 10C) to arrange by time division, Interlaced format which mixes the left-eye video signal and the right-eye video signal by line 10d), a checker box format (FIG. 10E) for mixing the left eye image signal and the right eye image signal for each box.

The OSD generator 440 generates an OSD signal according to a user input or itself. For example, a signal for displaying various types of information on a screen of the display 180 as a graphic or text may be generated based on a user input signal. The generated OSD signal may include various data such as a user interface screen, various menu screens, widgets, and icons of the image display apparatus 100. In addition, the generated OSD signal may include a 2D object or a 3D object.

The mixer 445 may mix the OSD signal generated by the OSD generator 440 and the decoded image signal processed by the image processor 420. In this case, the OSD signal and the decoded video signal may each include at least one of a 2D signal and a 3D signal. The mixed video signal is provided to the frame rate converter 450.

The frame rate converter 450 converts the frame rate of the input video. For example, a 60Hz frame rate is converted to 120Hz or 240Hz. When converting a frame rate of 60 Hz to 120 Hz, it is possible to insert the same first frame or insert a third frame predicted from the first frame and the second frame between the first frame and the second frame. When converting a frame rate of 60 Hz to 240 Hz, it is possible to insert three more identical frames or three predicted frames.

On the other hand, the frame rate converter 450 may output the input frame rate as it is without additional frame rate conversion. Preferably, when the 2D video signal is input, the frame rate can be output as it is. On the other hand, when a stereoscopic video signal is input, the frame rate can be varied as described above.

The formatter 460 may receive a mixed signal from the mixer 445, that is, an OSD signal and a decoded video signal, and separate the 2D video signal and the 3D video signal.

Meanwhile, in the present specification, the 3D video signal is meant to include a 3D object. Examples of the object include a picture in picture (PIP) image (still image or a video), an EPG indicating broadcast program information, various menus, widgets, There may be an icon, text, an object in the image, a person, a background, a web screen (newspaper, magazine, etc.).

The formatter 460 may change the format of the stereoscopic video signal. For example, the frame sequential format may be changed among various formats illustrated in FIG. 10.

11 illustrates an operation relationship between the 3D viewing apparatus 195 and the frame sequential format. 11A illustrates that when the left eye image L is displayed on the display 180, the left eye glass unit 240 of the 3D viewing apparatus 195 is opened and the right eye glass unit 260 is closed. (b) illustrates that the left eye glass portion 240 of the 3D viewing apparatus 195 is closed and the right eye glass portion 260 is opened.

The formatter 460 may convert a 2D video signal into a 3D video signal. For example, an edge or selectable object may be detected within the 2D image signal according to a 3D image generation algorithm, and an object or selectable object according to the detected edge may be separated into a 3D image signal and generated. Can be. In this case, the generated 3D image signal may be separated into a left eye image signal L and a right eye image signal R as described above.

The voice processing unit (not shown) in the controller 170 may perform voice processing of the demultiplexed voice signal. To this end, the voice processing unit (not shown) may include various decoders.

For example, if the demultiplexed speech signal is a coded speech signal, it can be decoded. Specifically, when the demultiplexed speech signal is an encoded speech signal of MPEG-2 standard, it may be decoded by an MPEG-2 decoder. In addition, when the demultiplexed speech signal is an encoded speech signal of MPEG 4 Bit Sliced Arithmetic Coding (BSAC) standard according to the terrestrial digital multimedia broadcasting (DMB) scheme, it may be decoded by an MPEG 4 decoder. In addition, when the demultiplexed speech signal is an encoded audio signal of the AAC (Advanced Audio Codec) standard of MPEG 2 according to the satellite DMB scheme or DVB-H, it may be decoded by the AAC decoder. In addition, when the demultiplexed speech signal is a encoded speech signal of the Dolby AC-3 standard, it may be decoded by the AC-3 decoder.

Also, the voice processing unit (not shown) in the controller 170 may process a base, a treble, a volume control, and the like.

The data processor (not shown) in the controller 170 may perform data processing of the demultiplexed data signal. For example, when the demultiplexed data signal is an encoded data signal, it may be decoded. The encoded data signal may be EPG (Electronic Progtam Guide) information including broadcast information such as a start time and an end time of a broadcast program broadcasted in each channel. For example, the EPG information may be ATSC-PSIP (ATSC-Program and System Information Protocol) information in the case of the ATSC scheme, and may include DVB-Service Information (DVB-SI) in the case of the DVB scheme. . The ATSC-PSIP information or the DVB-SI information may be information included in the aforementioned stream, that is, the header (4 bytes) of the MPEG-2 TS.

In FIG. 6, although the signals from the OSD generator 440 and the image processor 420 are mixed in the mixer 445, the formatter 460 performs 3D processing, but the present invention is not limited thereto. May be located after the formatter. That is, the output of the image processor 420 is 3D processed by the formatter 460, and the OSD generator 440 performs 3D processing together with OSD generation, and then mixes each processed 3D signal in the mixer 445. It is also possible.

Meanwhile, a block diagram of the controller 170 shown in FIG. 6 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 specification of the controller 170 that is actually implemented.

In particular, the frame rate converter 450 and the formatter 460 may not be provided in the controller 170, but may be provided separately.

FIG. 9 is a diagram illustrating an image formed by a left eye image and a right eye image, and FIG. 10 is a diagram illustrating a depth of a 3D image according to an interval between a left eye image and a right eye image.

First, referring to FIG. 9, a plurality of images or a plurality of objects 715, 725, 735, and 745 are illustrated.

First, the first object 715 includes a first left eye image 711 and L based on the first left eye image signal and a first right eye image 713 and R based on the first right eye image signal. An interval between the first left eye images 711 and L and the first right eye images 713 and R is illustrated to be d1 on the display 180. In this case, the user recognizes that the image is formed at an intersection point of the extension line connecting the left eye 701 and the first left eye image 711 and the extension line connecting the right eye 703 and the first right eye image 703. Accordingly, the user recognizes that the first object 715 is located behind the display 180.

Next, since the second object 725 includes the second left eye images 721 and L and the second right eye images 723 and R, the second object 725 overlaps each other and is displayed on the display 180. do. Accordingly, the user recognizes that the second object 725 is positioned on the display 180.

Next, the third object 735 and the fourth object 745 are the third left eye images 731 and L, the second right eye images 733 and R, the fourth left eye images 741 and L, and the fourth object, respectively. The right eye image 743 and R are included, and the intervals are d3 and d4, respectively.

According to the above-described method, the user recognizes that the third object 735 and the fourth object 745 are located at the positions where the images are formed, respectively, and in the figure, each of them is located in front of the display 180.

In this case, it is recognized that the fourth object 745 is protruded earlier, that is, more protruding than the third object 735, which is the distance between the fourth left eye images 741 and L and the fourth right eye images 743 and R. d4) is larger than the distance d3 between the third left eye images 731 and L and the third right eye images 733 and R.

Meanwhile, in the exemplary embodiment of the present invention, the distance between the display 180 and the objects 715, 725, 735, and 745 recognized by the user is expressed as a depth. Accordingly, the depth when the user is recognized as if it is located behind the display 180 has a negative value (-), and the depth when the user is recognized as if it is located before the display 180. (depth) is assumed to have a negative value (+). That is, the greater the degree of protrusion in the direction of the user, the greater the size of the depth.

Referring to FIG. 10, the distance a between the left eye image 801 and the right eye image 802 of FIG. 10 (a) is a distance between the left eye image 801 and the right eye image 802 shown in FIG. 10 (b). When (b) is smaller, it can be seen that it is smaller than the depth b 'of the 3D object of FIG. 10 (b) than the depth a' of the 3D object of FIG.

As such, when the 3D image is exemplified as the left eye image and the right eye image, a position recognized as image formation from the user's point of view varies depending on the distance between the left eye image and the right eye image. Therefore, by adjusting the display interval of the left eye image and the right eye image, it is possible to adjust the depth of the 3D image or 3D object composed of the left eye image and the right eye image.

14 is a diagram illustrating an example of a 3D image display.

Referring to the drawings, when the user 1305 wears the 3D viewing apparatus 195, the 3D image as shown in the figure may be recognized from the image display apparatus 100. That is, the image 1510 is recognized as having a depth of 0 on the display 180, and the 3D object 1520 having a predetermined depth protrudes and is displayed.

In particular, by using the 3D viewing device 195 including an active left eye or right eye polarizer and a passive left eye or right eye polarizer that are polarized in a predetermined direction, the light leakage effect when viewing 3D images can be improved. Cross talk can be reduced.

3D viewing apparatus according to the present invention is not limited to the configuration and method of the embodiments described as described above, the embodiments may be a combination of all or part of each embodiment selectively so that various modifications can be made It may be configured.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (13)

A left eye glass part including an active left eye polarizer that is polarized according to an applied electric signal, a passive left eye polarizer that is polarized in a predetermined direction, and a left eye glass; And
And a right eye glass unit including an active right eye polarizer that is polarized according to an applied electric signal, a passive right eye polarizer that is polarized in a predetermined direction, and a right eye glass. The method of claim 1,
The left eye glass is disposed between the active left eye polarizer and the passive left eye polarizer,
The right eye glass is disposed between the active right eye polarizer and the passive right eye polarizer. The method of claim 1,
The active left eye polarizer is polarized in the same direction as the passive left eye polarizer by an applied voltage.
And the active right eye polarizer is polarized in the same direction by an applied voltage. The method of claim 3,
And a voltage applied to the active left eye polarizer is different from a voltage applied to the active right eye polarizer. The method of claim 3,
And a polarization direction of the active left eye polarizer and the passive left eye polarizer and a polarization direction of the active right eye polarizer and the passive right eye polarizer are orthogonal to each other. The method of claim 1,
A wireless communication unit performing wireless communication with an image display device; And
And a control unit for controlling opening and closing of the left eye glass unit and the right eye glass unit, in response to the synchronization signal from the image display device. The method of claim 6,
The control unit,
And opening the left eye glass portion while the left eye image frame is displayed on the image display apparatus, and opening the right eye glass portion while the right eye image frame is displayed on the image display apparatus. The method of claim 1,
And a power supply unit supplying voltages to the active left eye polarizer and the active right eye polarizer, respectively. The method of claim 1,
And a switch for turning on or off the operation of the 3D viewing device. The method of claim 1,
Each of the active left eye polarizer and the active right eye polarizer,
First and second electrodes spaced apart from each other; And
And a liquid crystal disposed between the first electrode and the second electrode and whose alignment direction is changed by a voltage applied to the first electrode and the second electrode. A passive left eye polarizer polarized in a first direction;
An active left eye polarizer that is polarized in the same first direction as the passive left eye polarizer according to an applied electric signal while the left eye image frame is displayed in the image display apparatus;
A passive right eye polarizer polarized in a second direction; And
And an active right eye polarizer that is polarized in the same second direction as the passive right eye polarizer according to an applied electric signal while the right eye image frame is displayed in the image display apparatus. The method of claim 11,
And a control unit configured to control polarization directions of the active left eye polarizer and the active right eye polarizer, respectively. The method of claim 11,
A left eye glass disposed between the passive left eye polarizer and the active left eye polarizer; And
And a right eye glass disposed between the passive right eye polarizer and the active right eye polarizer.

Images