KR101796044B1 - Apparatus for displaying image - Google Patents

Abstract

A video display device according to an embodiment of the present invention includes a display panel and a patterned retarder disposed on a front surface of the display panel and including a first retarder and a second retarder having polarization characteristics different from each other, 1 retarder and a convex-shaped optical member attached to the front surface of the second retarder. According to the embodiment of the present invention, a 3D image can be easily viewed. In particular, it is possible to improve the luminance characteristic while reducing the crosstalk phenomenon.

Description

Apparatus for displaying image

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display apparatus, and more particularly, to an image display apparatus capable of easily viewing a 3D image.

A video display device is a device having a function of displaying an image that a user can view. The user can view the broadcast through the video 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 changing from analog broadcasting to digital broadcasting around the world.

Digital broadcasting refers to broadcasting in which digital video and audio signals are transmitted. Compared to analog broadcasting, digital broadcasting is strong against external noise and has a small data loss, is advantageous for error correction, has a high resolution, and provides a clear screen. Also, unlike analog broadcasting, digital broadcasting is capable of bidirectional service.

In addition, various studies on stereoscopic images have been conducted recently, and stereoscopic image technology has become more common and practical in various other environments and technologies as well as computer graphics.

An object of the present invention is to provide a video display device capable of easily viewing a 3D image. It is also an object of the present invention to provide a video display device capable of improving luminance characteristics while reducing crosstalk.

According to an aspect of the present invention, there is provided an image display apparatus including a display panel, a first retarder disposed on a front surface of a display panel and having different polarizations, And a convex shaped optical member attached to the front surface of the patterned retarder, the first retarder, and the second retarder.

According to the embodiment of the present invention, a 3D image can be easily viewed.

Particularly, luminance and resolution characteristics can be improved while the crosstalk phenomenon is reduced.

1 and 2 are internal block diagrams of an image display apparatus according to an embodiment of the present invention.
3 is an internal block diagram of the control unit of FIG.
4 is a diagram showing various formats of a 3D image.
5 is a diagram illustrating the operation of the 3D viewing apparatus according to the format of FIG.
6 is a diagram illustrating various scaling methods of a 3D image signal according to an exemplary embodiment of the present invention.
Fig. 7 is a view for explaining how images are formed by the left eye image and the right eye image.
8 is a view for explaining the depth of the 3D image according to the interval between the left eye image and the right eye image.
9 to 15 are views for explaining various examples of the image display apparatus according to the embodiment of the present invention.

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

The suffix "module" and " part "for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms "module" and "part" may be used interchangeably.

1 and 2 are internal block diagrams of an image display apparatus according to an embodiment of the present invention.

1, an image display apparatus 100 according to an exemplary embodiment of the present invention includes a tuner unit 110, a demodulation unit 120, an external device interface unit 130, a network interface unit 135, (Not shown), a controller 170, a display 180, an audio output unit 185, and a 3D viewing device 195. The display unit 180 may include a display unit 140, a user input interface unit 150, a sensor unit

The tuner unit 110 selects an RF broadcast signal corresponding to a channel selected by the user or all pre-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 unit 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 unit 110 can be directly input to the controller 170.

The tuner unit 110 may receive an RF broadcast signal of a single carrier according to an Advanced Television System Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme.

Meanwhile, the tuner unit 110 sequentially selects RF broadcast signals of all broadcast channels stored through a channel memory function among the RF broadcast signals received through the antenna in the present invention, and sequentially selects RF broadcast signals of the intermediate frequency signal, baseband image, . ≪ / RTI >

On the other hand, the tuner unit 110 can include a plurality of tuners in order to receive broadcast signals of a plurality of channels. Alternatively, a single tuner that simultaneously receives broadcast signals of a plurality of channels is also possible.

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 unit 110 is the ATSC scheme, the demodulation unit 120 performs 8-VSB (7-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 unit 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. 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 120 may be separately provided according to the ATSC scheme and the DVB scheme. That is, it can be provided as an ATSC demodulation unit and a DVB demodulation unit.

The stream signal output from the demodulation unit 120 may be input to the controller 170. The control unit 170 performs demultiplexing, video / audio signal processing, and the like, and then outputs an image to the display 180 and outputs audio to the audio output unit 185.

The external device interface unit 130 can transmit or receive data with the connected external device 190. [ 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 can be connected to an external device 190 such as a digital versatile disk (DVD), a Blu ray, a game device, a camera, a camcorder, a computer . The external device interface unit 130 transmits external video, audio or data signals to the controller 170 of the video display device 100 through the connected external device 190. 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 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), 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 image display apparatus 100 is capable of performing communication such as Bluetooth, radio frequency identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, DLNA (Digital Living Network Alliance) Depending on the standard, it can be networked with other electronic devices.

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

On the other hand, the external device interface unit 130 can transmit and receive data to and from the 3D viewing device 195.

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

The network interface unit 135 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 and related information such as movies, advertisements, games, VOD, broadcasting signals, etc., provided from the Internet, a content provider, and the like 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 135 is connected to, for example, an IP (Internet Protocol) TV and receives the processed video, audio or data signals from 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.

Meanwhile, 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 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 unit 140 may store a program for each signal processing and control in the control unit 170 or may store the processed video, audio, or data signals.

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

The storage unit 140 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 can reproduce files (moving picture files, still picture files, music files, document files, etc.) stored in the storage unit 140 and provide them to users.

1 shows an embodiment in which the storage unit 140 is provided separately from the control unit 170, the scope of the present invention is not limited thereto. The storage unit 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 configured to turn on / off the power, select the channel, and display the screen from the remote control device 200 according to various communication methods such as a radio frequency (RF) communication method and an infrared Or transmit a signal from the control unit 170 to the remote control device 200. The remote control device 200 may be connected to the remote control device 200 via a network.

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.

The sensor unit (not shown) may sense the position of the user or the gesture of the user, the touch or the position of the 3D viewing device 195. To this end, the sensor unit (not shown) may include a touch sensor, an audio sensor, a position sensor, an operation sensor, a gyro sensor, and the like.

The control unit 170 demultiplexes the input stream or processes the demultiplexed signals through the tuner unit 110 or the demodulation unit 120 or the external device interface unit 130 so as to output the video or audio output Signals can be generated and output.

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

The audio signal processed by the control unit 170 may be output to the audio output unit 185 as an audio signal. The audio 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. 1, the controller 170 may include a demultiplexer, an image processor, and the like. This will be described later with reference to FIG.

In addition, the control unit 170 can control the overall operation in the video display device 100. [ For example, the control unit 170 may control the tuner unit 110 to control the tuning of the RF broadcast corresponding to the channel selected by the user or the previously stored channel.

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

For example, the control unit 170 controls the tuner unit 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 control unit 170 may output the video or audio signal processed by the user through the display 180 or the audio output unit 185 together with the channel information selected by the user.

The control unit 170 controls the operation of the external device 190 through the external device interface unit 130 according to an external device video reproducing command received through the user input interface unit 150. For example, Or the video signal or audio signal from the camcorder can be output through the display 180 or the audio output unit 185. [

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

At this time, the image displayed on the display 180 may be a still image or a moving image, and may be a 2D image or a 3D image.

On the other hand, the controller 170 generates a 3D object for a predetermined object among the images displayed on the display 180, and displays the 3D object. For example, the object may be at least one of a connected web screen (newspaper, magazine, etc.), EPG (Electronic Program Guide), various menus, widgets, icons, still images, moving images, 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 be projected relative to the image displayed on the display 180.

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 display 180 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 120 or the stream signal output from the external device interface unit 130 and extracts an image from an input stream signal to generate a thumbnail image . 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 display 180 using the input thumbnail image. At this time, the thumbnail list may be displayed in a simple view mode displayed on a partial area in a state where a predetermined image is displayed on the display 180, or in a full viewing mode displayed in most areas of the display 180. The thumbnail images in the thumbnail list can be sequentially updated.

The display 180 converts a video signal, a data signal, an OSD signal, a control signal processed by the control unit 170, a video signal, a data signal, a control signal, and the like received from the external device interface unit 130, .

The display 180 may be a PDP, an LCD, an OLED, a flexible display, or the like, and may also be capable of a 3D display. In order to view the three-dimensional image, the display 180 may be divided into an additional display method and a single display method.

The single display method can implement a 3D image only on the display 180 without a separate additional display, for example, glass, and examples thereof include a lenticular method, a parallax barrier, and the like Various methods can be applied.

In addition, the additional display method can implement a 3D image using an additional display as the 3D viewing device 195 in addition to the display 180. For example, various methods such as a head mount display (HMD) type, Can be applied.

On the other hand, 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. Also, the head mount display type can be divided into a passive type and an active type.

On the other hand, the 3D viewing device 195 may be a 3D glass for stereoscopic viewing. The glass for 3D 195 may include a passive polarizing glass or an active shutter glass, and is described as a concept including the head mount type described above.

Meanwhile, 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 control unit 170, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs it as a voice. The voice output unit 185 may be implemented by various types of speakers.

A photographing unit (not shown) photographs the user. The photographing unit (not shown) may be implemented by a single camera, but the present invention is not limited thereto, and may be implemented by a plurality of cameras. On the other hand, the photographing unit (not shown) may be disposed above the display 180. The image information photographed by the photographing unit (not shown) is input to the control unit 170.

The control unit 170 can detect the gesture of the user by combining the images captured from the photographing unit (not shown) or the signals detected from the sensor unit (not shown), respectively.

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. Also, the remote control apparatus 200 can receive the video, audio, or data signal output from the user input interface unit 150 and display it or output it by the remote control apparatus 200.

The video display apparatus 100 described above can be applied to a digital broadcasting of ATSC system (8-VSB system), digital broadcasting of DVB-T system (COFDM system), digital broadcasting of ISDB-T system (BST-OFDM system) And a digital broadcasting receiver capable of receiving at least one of the digital broadcasting signals. 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 the present specification can be applied to various applications such as a TV receiver, a projector, a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants) 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.

1, the video display apparatus 100 does not include the tuner unit 110 and the demodulation unit 120 shown in FIG. 1, and may be connected to the network interface unit 130 or the external device interface unit 135 to play back the video content.

Hereinafter, the image display apparatus 100 according to the embodiment of the present invention will be described with reference to a liquid crystal display panel (LCD) -based display including a backlight unit having a three-dimensional display capability and a light source .

2, a liquid crystal display (LCD panel) based display 180 includes a liquid crystal display (LCD) panel 210, a driving circuit 230, a backlight driving unit 251, a backlight unit 252). ≪ / RTI >

The liquid crystal panel 210 includes a plurality of gate lines GL and data lines DL arranged in a matrix in order to display an image and a thin film transistor and a pixel electrode connected thereto are formed in an intersecting region A second substrate provided with a common electrode, and a liquid crystal layer formed between the first substrate and the second substrate.

The driving circuit unit 230 drives the liquid crystal panel 210 through a control signal and a data signal supplied from the control unit 170 shown in Fig. To this end, the driving circuit unit 230 includes a timing controller 232, a gate driver 234, and a data driver 236.

The timing controller 232 receives the control signal from the controller 170 and the R, G, and B data signals and the vertical synchronization signal Vsync and outputs a control signal to the gate driver 234 and the data driver 236 ), Rearranges the R, G, and B data signals, and provides the R, G, and B data signals to the data drive 236.

And supplies a scanning signal and a video signal to the liquid crystal panel 210 through the gate line GL and the data line DL under the control of the gate driver 234, the data driver 236 and the timing controller 232.

The backlight unit 252 supplies light to the liquid crystal panel 210. To this end, the backlight unit 252 may include a plurality of light sources.

 The backlight driver 251 generates a signal for driving the backlight unit, and can control a plurality of light sources to turn on / off the light source or to be scanned and driven. The backlight driver 251 may be divided into a scan driver for controlling the scanning operation of the backlight unit 252 and a driver for turning on and off the light source.

A predetermined image is displayed using the light emitted from the backlight unit 252 in a state in which the light transmittance of the liquid crystal layer is controlled by the electric field formed between the pixel electrode of the liquid crystal panel 210 and the common electrode.

The power supply unit 190 supplies the common electrode voltage Vcom to the liquid crystal panel 210 and supplies the gamma voltage to the data driver 236. [ Further, the backlight unit 252 can be supplied with driving power.

FIG. 3 is an internal block diagram of the control unit of FIG. 1, FIG. 4 is a diagram illustrating various formats of a 3D image, and FIG. 5 is a diagram illustrating operations of a 3D viewing apparatus according to the format of FIG.

A controller 170 according to an exemplary embodiment of the present invention includes a demultiplexer 310, an image processor 320, an OSD generator 340, a mixer 345, (350), and a formatter (360). An audio processing unit (not shown), and a data processing unit (not shown).

The demultiplexer 310 demultiplexes the input stream. For example, when an MPEG-2 TS is input, it can be demultiplexed into video, audio, and data signals, respectively. The stream signal input to the demultiplexer 310 may be a stream signal output from the tuner 110 or the demodulator 120 or the external device interface 130.

The image processing unit 320 may perform image processing of the demultiplexed image signal. To this end, the image processing unit 320 may include an image decoder 225 and a scaler 235. [

The video decoder 225 decodes the demultiplexed video signal and the scaler 235 performs scaling so that the resolution of the decoded video signal can be output from the display 180.

The video decoder 225 may include a decoder of various standards. For example, the video decoder 225 may include at least one of an MPEG-2 decoder, an H.264 decoder, an MPEC-C decoder (MPEC-C part 3), an MVC decoder, and an FTV decoder.

On the other hand, the image signal decoded by the image processing unit 320 can be divided into a case where there is only a 2D image signal, a case where a 2D image signal and a 3D image signal are mixed, and a case where there is only a 3D image signal.

For example, when an external video signal input from the external device 190 or a broadcast video signal of a broadcast signal received from the tuner unit 110 includes only a 2D video signal, when a 2D video signal and a 3D video signal are mixed And a case where there is only a 3D video signal. Accordingly, the controller 170, particularly, the image processing unit 320 and the like can process the 2D video signal, the mixed video signal of the 2D video signal and the 3D video signal, , A 3D video signal can be output.

Meanwhile, the image signal decoded by the image processing unit 320 may be a 3D image signal in various formats. For example, a 3D image signal composed of a color image and a depth image, or a 3D image signal composed of 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.

4, the format of the 3D video signal is a side-by-side format (Fig. 4A) in which the left eye image signal L and the right eye image signal R are arranged left and right, A frame sequential format (FIG. 4C) for arranging in a time division manner, an interlaced format (FIG. 4B) for mixing the left eye image signal and the right eye image signal line by line 4d), a checker box format (FIG. 4e) for mixing the left eye image signal and the right eye image signal box by box, and the like.

The OSD generation unit 340 generates an OSD signal according to a user input or by itself. For example, based on a user input signal, a signal for displaying various information in a graphic or text form on the screen of the display 180 can be generated. The generated OSD signal may include various data such as a user interface screen of the video display device 100, various menu screens, a widget, and an icon. In addition, the generated OSD signal may include a 2D object or a 3D object.

The mixer 345 may mix the OSD signal generated by the OSD generator 340 and the decoded video signal processed by the image processor 320. At this time, the OSD signal and the decoded video signal may include at least one of a 2D signal and a 3D signal. The mixed video signal is supplied to a frame rate converter 350.

A frame rate converter (FRC) 350 converts the frame rate of an input image. For example, a frame rate of 60 Hz is converted to 120 Hz, 240 Hz, or 480 Hz. When converting the frame rate of 60 Hz to 120 Hz, it is possible to insert the same first frame between the first frame and the second frame, or insert the third frame predicted from 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 insert three predicted frames. In the case of converting the frame rate of 60 Hz to 480 Hz, it is possible to insert seven more frames of the same frame or to insert seven frames of the predicted frame.

On the other hand, the frame rate converter 350 can output the frame rate as it is without any additional frame rate conversion. Preferably, when a 2D video signal is input, the frame rate can be output as it is. On the other hand, when a 3D video signal is input, the frame rate can be varied as described above.

The formatter 360 may arrange the left eye image frame and the right eye image frame of the frame rate-converted 3D image. The left eye glass of the 3D viewing apparatus 195 and the synchronization signal Vsync for opening the right eye glass can be output.

The formatter 360 receives the mixed signal, i.e., the OSD signal and the decoded video signal, from the mixer 345, and separates the 2D video signal and the 3D video signal.

In the present specification, a 3D video signal means a 3D object. Examples of the 3D object include a picuture in picture (PIP) image (still image or moving picture), an EPG indicating broadcasting program information, Icons, texts, objects in images, people, backgrounds, web screens (newspapers, magazines, etc.).

On the other hand, the formatter 360 can change the format of the 3D video signal. For example, it can be changed to any one of various formats exemplified in FIG. Accordingly, according to the format, the operation of the 3D viewing device of the glasses type can be performed as shown in FIG.

5A illustrates operation of the 3D-use glass 195, particularly, the shutter glass 195 when the formatter 360 arranges and outputs the frames in the frame sequential format of the format shown in FIG. 4. FIG.

That is, when the left eye image L is displayed on the display 180, the left eye glass of the shutter glass 195 is opened and the right eye glass is closed. When the right eye image R is displayed, The left eye glass is closed, and the right eye glass is opened.

On the other hand, FIG. 5B illustrates the operation of the 3D-use glass 195, particularly the polarizing glass 195, when the formatter 360 arranges and outputs the side-by-side format of the format shown in FIG. On the other hand, the 3D glass 195 applied in FIG. 5 (b) may be a shutter glass, and the shutter glass at this time may be operated as a polarizing glass by keeping both the left-eye glass and right-eye glass open .

Meanwhile, the formatter 360 may convert the 2D video signal into a 3D video signal. For example, according to a 3D image generation algorithm, an edge or a selectable object is detected in a 2D image signal, and an object or a selectable object according to the detected edge is separated into a 3D image signal and is generated . At this time, the generated 3D image signal can be separated into the left eye image signal L and the right eye image signal R, as described above.

Although not shown in the drawing, it is also possible that a 3D processor (not shown) for 3-dimensional effect signal processing is further disposed after the formatter 360. The 3D processor (not shown) can process the brightness, tint, and color of the image signal to improve the 3D effect. For example, it is possible to perform signal processing such as making the near field clear and the far field blurring. On the other hand, the functions of such a 3D processor can be merged into the formatter 360 or merged into the image processing unit 320. [ This will be described later with reference to FIG. 6 and the like.

Meanwhile, the audio processing unit (not shown) in the control unit 170 can perform the audio processing of the demultiplexed audio signal. To this end, the audio 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 MPEG-2 standard encoded speech signal, it can be decoded by an MPEG-2 decoder. In addition, if the demultiplexed speech signal is a coded voice signal of the MPEG 4 BSAC (Bit Sliced Arithmetic Coding) standard according to a terrestrial DMB (Digital Multimedia Broadcasting) scheme, it can be decoded by an MPEG 4 decoder. Also, if 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 can be decoded by the AAC decoder. Further, when the demultiplexed speech signal is a Dolby AC-3 standard encoded voice signal, it can be decoded by an AC-3 decoder.

In addition, the audio processing unit (not shown) in the control unit 170 can process a base, a treble, a volume control, and the like.

The data processing unit (not shown) in the control unit 170 can perform data processing of the demultiplexed data signal. For example, if the demultiplexed data signal is a coded data signal, it can be decoded. The encoded data signal may be EPG (Electronic Program Guide) information including broadcast information such as a start time and an end time of a broadcast program broadcasted on 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-SI information in the DVB scheme . The ATSC-PSIP information or the DVB-SI information may be information included in the above-mentioned stream, that is, the header (2 bytes) of the MPEG-2 TS.

3, the signals from the OSD generating unit 340 and the image processing unit 320 are mixed in the mixer 345 and then 3D processed in the formatter 360. However, the present invention is not limited to this, May be located behind the formatter. That is, the output of the image processing unit 320 is 3D-processed by the formatter 360, and the OSD generating unit 340 performs 3D processing together with the OSD generation. Thereafter, the processed 3D signals are mixed by the mixer 345 It is also possible to do.

Meanwhile, the block diagram of the controller 170 shown in FIG. 3 is a block diagram for an embodiment of the present invention. Each component of the block diagram can be integrated, added, or omitted according to the specifications of the control unit 170 actually implemented.

In particular, the frame rate converter 350 and the formatter 360 are not provided in the controller 170, but may be separately provided.

6 is a diagram illustrating various scaling methods of a 3D image signal according to an exemplary embodiment of the present invention.

Referring to the drawing, in order to increase the 3-dimensional effect, the controller 170 may perform 3D effect signal processing. In particular, it is possible to perform a size adjustment or a tilt adjustment of a 3D object in a 3D image.

The 3D object 510 in the 3D image signal or the 3D image signal can be enlarged or reduced 512 as a whole at a certain ratio as shown in FIG. 6 (a), and also, as shown in FIG. 6 (b) , The 3D object may be partially enlarged or reduced (trapezoidal shape, 514, 516). 6 (d), at least a portion of the 3D object may be rotated (parallelogram shape 518). This scaling (scaling) or skew adjustment can emphasize the 3D effect of a 3D object in a 3D image or a 3D image, that is, a 3D effect.

On the other hand, as the slope becomes larger, the difference in length between the parallel sides of the trapezoidal shapes 514, 516 becomes larger as shown in Fig. 6B or 6C, .

The size adjustment or the tilt adjustment may be performed after the 3D image signal is aligned in a predetermined format in the formatter 360. [ Or in the scaler 235 in the image processing unit 320. [ On the other hand, the OSD generating unit 340 may generate an object in a shape as illustrated in FIG. 6 for the OSD generated for 3D effect enhancement.

Although not shown in the drawing, signal processing for a 3D effect (3-dimensional effect) may be performed by adjusting the brightness, tint, and brightness of an image signal or object, It is also possible that signal processing such as color adjustment is performed. For example, it is possible to perform signal processing such as making the near field clear and the far field blurring. The signal processing for the 3D effect may be performed in the controller 170 or may be performed through a separate 3D processor. Particularly, when it is performed in the control unit 170, it is possible to perform it in the formatter 360, or in the image processing unit 320, together with the above-described size adjustment or tilt adjustment.

FIG. 7 is a view for explaining how images are formed by a left eye image and a right eye image, and FIG. 8 is a view for explaining depths of a 3D image according to an interval between a left eye image and a right eye image.

First, referring to FIG. 7, a plurality of images or a plurality of objects 615, 625, 635, and 645 are illustrated.

First, the first object 615 includes a first left eye image 611 (L) based on the first left eye image signal and a first right eye image 613 (R) based on the first right eye image signal, It is exemplified that the interval between the first left eye image 611, L and the first right eye image 613, R is d1 on the display 180. [ At this time, the user recognizes that an image is formed at an intersection of an extension line connecting the left eye 601 and the first left eye image 611 and an extension line connecting the right eye 603 and the first right eye image 603. Accordingly, the user recognizes that the first object 615 is positioned behind the display 180. [

Next, since the second object 625 includes the second left eye image 621, L and the second right eye image 623, R and overlaps with each other and is displayed on the display 180, do. Accordingly, the user recognizes that the second object 625 is located on the display 180. [

Next, the third object 635 and the fourth object 645 are arranged in the order of the third left eye image 631, L, the second right eye image 633, R, the fourth left eye image 641, Right eye image 643 (R), and their intervals are d3 and d4, respectively.

According to the above-described method, the user recognizes that the third object 635 and the fourth object 645 are positioned at positions where the images are formed, respectively, and recognizes that they are located before the display 180 in the drawing.

At this time, it is recognized that the fourth object 645 is projected before the third object 635, that is, more protruded than the third object 635. This is because the interval between the fourth left eye image 641, L and the fourth right eye image 643, d4 is larger than the interval d3 between the third left eye image 631, L and the third right eye image 633, R. [

Meanwhile, in the embodiment of the present invention, the distance between the display 180 and the objects 615, 625, 635, and 645 recognized by the user is represented by a depth. Accordingly, it is assumed that the depth when the user is recognized as being positioned behind the display 180 has a negative value (-), and the depth when the user is recognized as being positioned before the display 180 (depth) has a negative value (+). That is, the greater the degree of protrusion in the user direction, the greater the depth.

8, the interval a between the left eye image 701 and the right eye image 702 in FIG. 8A is smaller than the interval between the left eye image 701 and the right eye image 702 shown in FIG. 8 (b) (b ') of the 3D object shown in Fig. 8 (b) is larger than the depth a' of the 3D object shown in Fig. 8 (a).

In this way, when the 3D image is exemplified as the left eye image and the right eye image, the positions recognized as images are different depending on the interval between the left eye image and the right eye image. Accordingly, by adjusting the display intervals of the left eye image and the right eye image, the depth of the 3D image or the 3D object composed of the left eye image and the right eye image can be adjusted.

9 to 15 are views for explaining various examples of the image display apparatus according to the embodiment of the present invention.

A 3D image display device using a currently available spectacle type 3D viewing apparatus realizes a stereoscopic image by displaying the polarizing direction of left and right parallax images in a reversed or time-division manner and using polarizing glasses or shutter glasses.

For example, the currently available 3D glasses type can be roughly divided into Patterned Retarder and Shutter Glasses.

Patterned Retarder has advantages such as light and comfortable glasses, high luminance and low crosstalk, compared with shutter glass type, but it has a disadvantage that there is a limitation on the upper and lower viewing angles due to structural problems have.

A patterned retarder method will be described with reference to FIGS. 9 to 10. FIG.

The basic principle of the patterned retarder method is as follows. The image display device attaches another polarizing filter, that is, a patterned retarder, for each line in the horizontal direction, (L), and right eye (R) images. The user views this through polarizing glasses composed of polarizing filters corresponding to L and R polarizing filters (patterned retarders), thereby realizing a 3D image.

10, a patterned retarder system includes a patterned retarder 1060 for switching the polarization characteristics of light incident on the polarizing glasses 195 on the display panel 1030 .

The image display apparatus alternately displays the left eye image L and the right eye image R on the display panel 1030 and switches polarization characteristics incident on the polarizing glasses 195 through the pattern retarder 1060. Thus, a stereoscopic image can be realized by spatially dividing the left eye image L and the right eye image R. [

The image display apparatus may include a backlight unit 1010 for emitting light including a light source when the display panel 1030 is a liquid crystal display panel and a polarizing film 1030 , 1040 can be attached.

On the other hand, the patterned retarder 1060 can be disposed in front of the display panel 1030 in various ways. For example, by laminating the polarizing film 1040, or may be formed on a separate base portion such as a transparent substrate 1070.

Referring to FIG. 11, the patterned retarder scheme may further include a black stripe for enhancing the visibility of the 3D image and preventing the crosstalk phenomenon.

For example, as shown in FIG. 11A, a pattern drifting device 1120 is disposed on a front surface of a display panel 1110, and a pattern relieving device 1120 is disposed on a boundary portion of retarders 1121 and 1122 having different polarization characteristics And a black stripe 1123 disposed thereon.

Alternatively, as shown in FIG. 11 (b), a black stripe 1127 disposed between the retarders 1125 and 1126 having different polarization characteristics may be further included.

11, a technique of preventing crosstalk between a left eye image and a right eye image by inserting a black stripe between the left eye image and a retarder (polarizing filter) for the right eye image is applied.

However, although the viewing angle is improved as the black stripe becomes larger, there is a disadvantage that the transmissivity is lowered and the luminance is lowered. Therefore, a lot of efforts are being made to find a way to improve the viewing angle and the luminance at the same time.

The 3D implementation principle of the pattern-driven retarder is to attach different polarizing filters alternately one line at a time in the horizontal direction of the screen, display the L and R images in the corresponding line in the image processing unit, It is a principle that 3D image is realized by watching through polarized glasses composed of filters.

Therefore, the left eye (L) image displayed on the left eye image line must pass through only the left eye lens side of the polarizing glasses, and the right eye image displayed on the right eye image line must pass through only the right eye lens side of the polarizing glasses.

If the left eye (L) image of the left eye image line passes through the right eye side of the polarizing glasses or the right eye (R) image passes through the left eye lens side of the polarizing glasses, a normal 3D image is not formed, A crosstalk phenomenon may occur.

This crosstalk phenomenon is more likely to occur when the screen is viewed above or below the viewing angle, which is influenced by the spacing between the patterned retarder (polarizing filter) attached to the front of the screen and the display panel Can receive.

11 (b), the crosstalk phenomenon does not occur because the left eye image is seen in the left eye lens of the polarizing glasses at the positions P2 and P3 within the predetermined angle, but at the positions P1 and P4 beyond the predetermined angle The right eye image is displayed on the left eye lens of the polarizing glasses, and a crosstalk phenomenon may occur.

12A and 12B are diagrams for explaining the crosstalk viewing angle and the luminance change due to the vertical width of the black stripe. In FIGS. 12A and 12B, The spacing between the retarders 1220 is the same.

In Fig. 12, D1 and D2 indicate vertical viewing angles at which no crosstalk occurs.

12, since the vertical width of the black stripe 1221 in FIG. 12A is smaller than the vertical width of the black stripe 1222 in FIG. 12B, The upper and lower viewing angles in which the crosstalk phenomenon does not occur are smaller than those in FIG. 12 (b), but the luminance characteristic is further superior since the transmittance reduction by the black stripe is also small.

That is, as shown in FIG. 12, if the black stripe is thickened up and down, there is an advantage that the upper and lower viewing angles in which image crosstalk does not occur are widened, but the transmittance is lowered due to the vertical width of the black stripe, have.

For the above reasons, the image crosstalk and the brightness of the screen may be in a trade-off relationship with the width of the black stripe.

Accordingly, the present invention proposes an image display device capable of reducing the width of the black stripe and preventing crosstalk of the image while raising the brightness of the screen.

13 to 15 are views referred to explain various examples of the image display apparatus according to the embodiment of the present invention.

Referring to the drawings, an image display apparatus according to an embodiment of the present invention includes a display panel 1310, wherein the display panel 1310 may be a liquid crystal display panel.

The image display device according to the embodiment of the present invention includes a first retarder 1321 and a second retarder 1322 disposed on the front surface of the display panel 1310 and having different polarizations A patterned retarder 1320 and a second retarder 1322. The optical member 1324 is convex on one side and attached to the front surface of the first retarder 1321 and the second retarder 1322.

The first retarder 1321 and the second retarder 1322 are arranged alternately. Each of the retarders delays the phase of light by, for example,? (Wavelength) / 4 using a birefringence medium. In this case, the optical axis of the first retarder pattern and the optical axis (or phase retardation axis) of the second retarder pattern can be orthogonal to each other.

The first retarder 1321 may be arranged to face an area in which one of the left eye image and the right eye image is displayed in the display panel 1310. The second retarder 1322 may be disposed in a region As shown in FIG.

For example, the first retarder 1321 may be disposed to face the right eye image, and the second retarder 1322 may face the area where the left eye image is displayed.

On the other hand, the first retarder 1321 and the second retarder 1322 having different polarization characteristics can convert light into circularly polarized light or linearly polarized light, respectively. For example, the first retarder 1321 and the second retarder 1322 may have different phase delay characteristics of light, and may pass the light of the other polarization component to divide the 3D image into polarized light.

The user can view the 3D image through the polarizing glasses having the polarizing properties corresponding to the first retarder 1321 and the second retarder 1322 and the polarizing glasses including the polarizing lens.

The pattern reliader 1320 may be patterned on the base portion of either the glass substrate, the transparent plastic substrate, or the film. The base portion on which the patterned retarder 1320 is formed can be attached to the polarizing film through an adhesive. Meanwhile, according to the embodiment, the patterned retarder 1320 may be a polymer liquid crystal layer and may have a thickness of several micrometers.

On the other hand, the optical member 1324 may be a semi-cylindrical lens. Here, the semi-cylindrical shape may include a case where one side is formed with a predetermined curve in addition to the case where the cut surface is exactly semicircular.

For example, as shown in FIG. 13, a lens having a small curved surface in the horizontal direction may be attached to the front surface of the patterned retarder 1320 to raise a critical angle D3 at which no crosstalk occurs .

The critical angle at which no crosstalk occurs can be influenced by the vertical width of the black stripe and the distance between the display panel and the patterned retarder. For example, the critical angle at which the crosstalk phenomenon does not occur becomes wider as the vertical width of the black stripe becomes larger, and can be widened as the distance between the display panel and the pattern reliader becomes smaller.

Therefore, the present invention can increase the critical angle at which the crosstalk phenomenon does not occur, while using an optical member that refracts light, with a gap between the same display panel and the patterned retarder.

Accordingly, it is possible to prevent the situation that the images of the upper and lower adjacent lines pass through the opposite polarizing filter in the polarizing glasses, even if the black stripes are reduced or the black stripes themselves are minimized.

Thus, the vertical width of the black stripe can be minimized, and the brightness of the screen can be improved, and the crosstalk phenomenon of the image can be prevented, thereby providing many advantages.

In the present invention, the length of the optical member 1324 in the horizontal direction is larger than the length in the vertical direction. That is, the optical member 1324 may be formed to extend in the horizontal direction.

In this case, the long axis of the optical member 1324 may be formed parallel to the long axis of the first retarder 1321 and the second retarder 1322.

On the other hand, as described above, in order to reduce the crosstalk phenomenon, the image display apparatus may further include a black stripe.

The black stripe may be disposed on the boundary portion between the first retarder and the second retarder or may be disposed on the boundary between the first retarder 1321 and the second retarder 1322, As shown in FIG.

On the other hand, the arrangement of the patterned retarder may vary according to the display pattern of the 3D image.

For example, as shown in FIG. 13, the first retarder 1321 and the second retarder 1322 may be arranged alternately one by one. Alternatively, as shown in FIG. 14, the first retarder 1421 and the second retarder 1422 may be arranged alternately by two.

On the other hand, a part of the optical member may overlap with the black stripe. Here, the overlap does not mean that only a part of the optical member is formed on the black stripe, as shown in Figs. 13 and 14. For example, this means that a part of the optical member and the black stripe overlap when viewed from the front side. Therefore, there may be a retarder or an air layer between the optical member and the black stripe.

Here, the width of the optical member may be greater than the width of the first retarder.

In another embodiment, as shown in Fig. 15, the optical member 1524 and the black stripe 1523 may not overlap. In this case, the width of the optical member 1524 may be smaller than the widths of the first retarder 1521 and the second retarder 1522.

On the other hand, the black stripe may be arranged to overlap the boundary between the left eye image and the right eye image.

According to the present invention, it is possible to minimize the vertical width of the black stripe, thereby improving the brightness of the screen and preventing the crosstalk phenomenon of the image.

In addition, the resolution can be improved.

When 3D resolution is increased while 3D images are displayed accurately in the 3D implementation by the pattern-dependent retarder method, the number of black stripes to be inserted also increases proportionally. The increase in the number of black stripes causes a problem of decreasing the transmittance as described above, which causes a decrease in the overall luminance.

In particular, if the resolution is increased in the same screen size, the pixel size becomes relatively small. On the contrary, the black stripe can not sufficiently reduce the thickness due to the limitation of the viewing angle.

However, when the optical member having a small curved surface in the horizontal direction is attached to the front surface of the patterned retarder, the vertical width of the black stripe can be minimized without affecting the viewing angle. Accordingly, since the number of pixels can be increased without decreasing the luminance, it is also advantageous in terms of resolution improvement.

On the other hand, the pattern reliader can be disposed in front of the display panel in various ways. For example, laminating to a polarizing film, or formed on a separate base portion such as a transparent substrate.

The image display apparatus according to the present invention is not limited to the configuration and method of the embodiments described above, but the embodiments may be modified such that all or some of the embodiments are selectively combined .

On the other hand, when an element is referred to as being "connected" or "arranged" to another element, it may be directly connected or disposed to the other element, but other elements may be present in the middle It can be understood that it is possible.

On the other hand, when an element is referred to as being "directly connected" or "directly" to another element, it can be understood that there are no other elements in between.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

Claims (15)

A display panel;
A patterned retarder disposed on a front surface of the display panel and including a first retarder and a second retarder having polarization characteristics different from each other;
A black stripe disposed between the first retarder and the second retarder; And
And a convex shaped optical member attached to the front surface of the first retarder and the second retarder,
The black stripe and the optical member do not overlap,
Wherein a width of the optical member is smaller than a width of the first retarder. The method according to claim 1,
Wherein the optical member is a semi-cylindrical lens. The method according to claim 1,
Wherein the optical member has a length in a horizontal direction longer than a length in a vertical direction. The method of claim 3,
And the long axis of the optical member is parallel to the long axis of the first retarder and the second retarder. The method according to claim 1,
Wherein the first retarder and the second retarder are arranged alternately one by one. The method according to claim 1,
Wherein the first retarder and the second retarder are arranged alternately by two. delete delete delete delete delete The method according to claim 1,
Wherein the black stripe is disposed so as to overlap a boundary portion between a left eye image and a right eye image. The method according to claim 1,
And the polarization characteristics of the first retarder and the second retarder are orthogonal to each other. The method according to claim 1,
And a base portion on which the patterned retarder is formed. The method according to claim 1,
Wherein the display panel is a liquid crystal display panel.

Images