KR20110138676A - Image display device and operating method for the same - Google Patents

Abstract

PURPOSE: A method for operating an image display device is provided to restrict the afterimage of an image through the change of a format of the image. CONSTITUTION: A control unit receives the format selection signal of a user(S1030,S1040). The control unit operates a formatter. The formatter converts an input image as a format corresponding to the format selection signal(S1050). A display unit receives an image signal about the outpu8t image in which the format is converted from the control unit. The display unit displays the outputs image(S1060).

Description

Image Display Device and Operating Method for the Same

The present invention relates to an image display apparatus capable of displaying an image in three dimensions and an operation method thereof. More specifically, the present invention relates to an image display apparatus capable of removing an afterimage of a 3D image and an operation method thereof.

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 all over the world.

Digital broadcasting refers to broadcasting for transmitting digital video and audio signals. Digital broadcasts are more resistant to false noise than analog broadcasts, resulting in lower data loss, better error correction, higher resolution, and clearer pictures. In addition, unlike analog broadcasting, digital broadcasting is capable of bidirectional services.

Recently, researches on various contents that can be provided through stereoscopic images and stereoscopic images have been actively conducted, and stereoscopic image technology has become more and more common and practical in computer graphics as well as in various other environments and technologies. In addition, the above-described digital broadcasting can transmit a stereoscopic image, and a development for a device for reproducing the same is also in progress.

An object of the present invention is to provide an image display apparatus or a method of operating the same, which can improve a phenomenon in which an afterimage occurs when an input image is input in a format not suitable for an image display apparatus or an operation of a formatter when playing a 3D image. .

Accordingly, according to an aspect of the present invention, a method of operating an image display apparatus capable of reproducing a 3D image is provided. An operation method of an image display apparatus according to an exemplary embodiment of the present invention may include a formatter for generating a 3D image signal or converting a format of the 3D image to a format supported for output through the image display apparatus when playing the 3D image. Receiving a 3D input image after the operation is temporarily stopped, if the format of the 3D input image and the format supported by the image display device is different, the formatter is driven to display the 3D input image. Converting to a supported format to generate a 3D output image and displaying the 3D output image.

According to another aspect of the present invention, there is provided an image display apparatus capable of reproducing a 3D image. An image display apparatus according to an embodiment of the present invention is a formatter for generating a 3D video signal or converting a format of the 3D video to a format supported for outputting the 3D video when the 3D video is played back, and the operation of the formatter is temporarily performed. The image signal input unit receiving the 3D input image after being stopped, and when the format of the 3D input image is different from the format supported by the image display apparatus, the image display apparatus supports the 3D input image by driving the formatter. And a control unit for generating a 3D output image by converting the format into a format, and a display unit for displaying the 3D output image. The formatter may be included in the controller.

According to an embodiment of the present invention, when the user leaves the image in which the afterimage occurs, the image display apparatus may determine the image and change the format of the image to suppress the afterimage of the image. In particular, the image may be processed by arbitrarily changing the format according to whether the user is absent or waiting for a user's command to be input. In particular, it is possible to solve an afterimage problem frequently occurring in a PDP image display device and provide an effective screen saver function.

1 is a view showing an image display device system according to an embodiment of the present invention.
2 is an internal block diagram of an image display device according to an embodiment of the present invention.
3 is an internal block diagram of a controller of an image display device according to an embodiment of the present invention;
4 is a diagram illustrating an example of a 3D video signal format capable of implementing 3D video.
5 is a diagram illustrating various scaling methods of a 3D video signal according to an embodiment of the present invention.
6 is a view showing a state in which the depth of the 3D image or 3D object is variable according to an embodiment of the present invention.
7 is a view showing a state in which a sense of depth, such as an image is controlled in accordance with an embodiment of the present invention.
8 is a diagram illustrating a screen of an image display apparatus to which an embodiment of the present invention is applied.
9 is a diagram illustrating a screen of an image display apparatus in which an afterimage is removed according to an exemplary embodiment of the present invention.
10 is a flowchart illustrating a method of operating an image display apparatus according to an embodiment of the present invention.
11 is a flowchart illustrating a method of operating an image display apparatus according to another exemplary embodiment of the present invention.

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 an image display device system according to an exemplary embodiment of the present invention.

The video display device 100 according to an embodiment of the present invention may communicate with the broadcasting station 210, the network server 220, or the external device 230.

The video display device 100 may receive a broadcast signal including a video signal transmitted from the broadcast station 210. The video display device 100 may process a video signal, an audio signal, or a data signal included in a broadcast signal to be suitable for outputting from the video display device 100. The image display apparatus 100 may output an image or sound based on the processed image signal.

The image display apparatus 100 may communicate with the network server 220. The network server 220 is a device capable of transmitting and receiving a signal with the image display device 100 through an arbitrary network. For example, the network server 220 may be a mobile phone terminal that may be connected to the image display device 100 through a wired or wireless base station. In addition, the network server 220 may be a device capable of providing content to the image display device 100 through an Internet network. The content provider may provide content to the video display device 100 using a network server.

The image display device 100 may communicate with the external device 230. The external device 230 is a device capable of directly transmitting and receiving a signal with the image display device 100 by wire or wirelessly. For example, the external device 230 may be a media storage device or a playback device used by a user. That is, the external device 230 may be a camera, a DVD or a Blu-ray player, a personal computer, or the like.

The broadcasting station 210, the network server 220, and the external device 230 may transmit a signal including a video signal to the video display device 100. The image display apparatus 100 may display an image based on an image signal included in an input signal. In addition, the image display apparatus 100 may transmit a signal transmitted from the broadcasting station 210 and the network server 220 to the image display apparatus 100 to the external device 230. In addition, the signal transmitted from the external device 230 to the image display device 100 may be transmitted to the broadcasting station 210 or the network server 220. That is, the image display apparatus 100 may transmit content included in a signal transmitted from the broadcasting station 210, the network server 220, and the external device 230 in addition to directly playing the content on the image display apparatus 100.

2 is a block diagram illustrating an image display apparatus according to an embodiment of the present invention.

2, the image display device 100 according to an embodiment of the present invention is a broadcast signal receiving unit 110, a network interface unit 120, an external device input and output unit 130, a remote control device interface unit 140 ), The storage unit 150, the controller 170, the display 180, and the sound output unit 185 may be included. The broadcast signal receiving unit 110, the network interface unit 120, the external device input / output unit 130, or a module including one or more thereof may be referred to as an image signal input unit (not shown). That is, the image display apparatus may display an image by receiving an image signal through the image signal input unit, and the image signal input unit may broadcast the signal receiver 110, the network interface unit 120, and input / output of an external device according to the path of the image signal. Division 130 or the like, or may include one or more of these.

First, the broadcast signal receiving unit 110 receives 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 from a broadcasting station (see 210 in FIG. 1). can do. The broadcast signal receiving unit 110 may convert the received RF broadcast signal into an intermediate frequency signal or a baseband video or audio signal and output the converted signal to the controller 170.

In addition, the broadcast signal receiver 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 multiple carriers according to a digital video broadcasting (DVB) scheme. The broadcast signal receiving unit 110 may sequentially select the RF broadcast signals of all the broadcast channels stored through the channel memory function among the received RF broadcast signals and convert them into intermediate frequency signals or baseband video or audio signals. This is for illustrating a thumbnail list including a plurality of thumbnail images corresponding to a broadcast channel on the display unit 180. Accordingly, the broadcast signal receiver 110 may receive RF broadcast signals of a selected channel or all prestored channels sequentially / periodically.

The network interface unit 120 provides an interface for connecting the image display apparatus 100 to a wired / wireless network including an internet network or a network server thereof (see 220 of FIG. 1).

The network interface unit 120 may include a wireless communication unit capable of wirelessly connecting the image display apparatus 100 to the Internet. For wireless Internet access, wireless LAN (Wi-Fi), wireless broadband (Wibro), world interoperability for microwave access (Wimax), high speed downlink packet access (HSDPA) communication standards, and the like may be used.

The network interface unit 120 may receive content or data provided by a content provider or a network operator through a network. That is, content such as broadcasts, games, VODs, broadcast signals, and the like, which are 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.

In addition, the network interface unit 120 may be connected to a communication network capable of video or voice calls. The communication network may mean a broadcast type communication network, a public telephone network, a mobile communication network, or the like connected through a LAN.

The external device input / output unit 130 may connect an external device (see 230 of FIG. 1) and the image display device 100. To this end, the external device input / output unit 130 may include an A / V input / output unit or a wireless communication unit.

The external device input / output unit 130 is connected to an external device such as a DVD (Digital Versatile Disk), Blu-ray (Blu ray), a game device, a camera, a camcorder, a computer (laptop) or the like by wire / wireless. The external device input / output unit 130 transmits an image signal, an audio signal, or a data signal input from the outside to the controller 170 of the image display apparatus 100 through a connected external device. In addition, the video signal, audio signal or data signal processed by the controller 170 may be output to the connected external device.

The A / V input / output unit is a module for inputting video and audio signals from an external device into the video display device 100. The A / V input / output unit includes an Ethernet terminal, a USB terminal, a Composite Video Banking Sync (CVBS) terminal, and a component terminal. At least one of an S-video terminal (analog), a DVI (Digital Visual Interface) terminal, an HDMI (High Definition Multimedia Interface) terminal, an RGB terminal, and a D-SUB terminal.

In addition, the wireless communication unit may perform wireless communication with another external device. The image display device 100 may be connected to other external devices and networks according to communication standards such as Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), and ZigBee. Can be connected.

In addition, the external device input / output 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.

For example, when the set-top box is a set-top box for an IP (internet protocol) TV, the external device input / output unit 130 controls the video, audio, or data signal processed by the set-top box for the IP TV to enable bidirectional communication. 170). In addition, the signals processed by the controller 170 may be transmitted to the set-top box for the IP TV.

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 image display apparatus 100 may be controlled by a signal transmitted from the remote control apparatus 200. The user may input commands such as power on / off, channel up / down, volume up / down, etc. to the image display apparatus 100 using the remote control apparatus 200. The remote control apparatus 200 transmits a signal including a command corresponding to a user's manipulation to the image display apparatus 100. The image display apparatus 100 may determine a signal received from the remote control apparatus 200 to generate a control signal according to the signal, or perform an operation according to a command included in the signal.

The remote control apparatus 200 may transmit a signal to the image display apparatus 100 according to the IR communication standard. In addition, the remote control apparatus 200 may transmit a signal to the image display apparatus 100 or receive a signal transmitted by the image display apparatus 100 according to another type of wireless communication standard. Among the remote control apparatus 200, there may be a remote control apparatus 200 that detects a user's movement and transmits a signal including a command corresponding to the movement to the image display apparatus 100. In the present embodiment, such a remote control device 200 will be described as an example of a spatial remote control. According to various embodiments of the present disclosure, in addition to the space remote control, a general wired / wireless mouse or an air mouse or various pointing means or remote controllers in various forms (rings, bracelets, thimbles, etc.) may correspond to the remote control apparatus 200. have. The remote controller interface 140 may include a wireless communication unit capable of wirelessly transmitting and receiving signals with the remote controller 200, and a coordinate calculation unit configured to calculate coordinates of a pointer corresponding to the movement of the remote controller 200. It can be provided. The remote control device interface unit 140 may transmit and receive a signal wirelessly with the remote control device 200 through the RF module. In addition, the remote control device 200 may receive a signal transmitted according to the IR communication standard through the IR module.

The coordinate calculation unit of the remote control unit interface unit 140 may correct hand shake or error from a signal corresponding to the movement of the remote control unit 200 received through the wireless communication unit of the remote control unit interface unit 140. The coordinate calculation unit may calculate the coordinates of the pointer to be displayed on the display of the image display apparatus 100 after correcting the shaking or error.

The remote controller transmission signal input to the image display apparatus 100 through the remote controller interface unit 140 is output to the controller 170 of the image display apparatus 100. The control unit 170 determines the information on the movement or the key operation of the remote control device 200 from the signal transmitted from the remote control device 200, and in response to the various controls for controlling the operation of the image display device 100 Control signals can be generated and output.

As another example, the remote controller 200 may calculate a pointer coordinate corresponding to the movement of the remote controller 200 and output the pointer coordinates to the remote controller interface unit 140. In this case, the remote controller interface 140 may transmit the information about the received pointer coordinates to the controller 170 without a separate correction process for hand shake or error.

The storage unit 150 may store an image signal input to the image display apparatus 100, an audio signal related to the image signal, and a data signal. For example, a video storage command may be input to the video display device 100 that is playing a video based on a broadcast signal. The image display apparatus 100 may store at least a portion of the video being played in the storage 150 in response to the input video storage command. When the stored video playback command is input, the video display device 100 may refer to the video signal stored in the storage unit 150, an audio signal related to the video signal, and a data signal. The image display apparatus 100 may reproduce a video based on the referenced signal.

The controller 170 controls the overall operation of the image display apparatus 100. The controller 170 may receive a signal transmitted from the remote control apparatus 200 or another kind of control command input means. In addition, a command may be input through a local key provided in the image display apparatus 100. The controller 170 determines a command included in the received signal or a command corresponding to a local key manipulation and controls the image display apparatus 100 to correspond thereto.

For example, when a user inputs a predetermined channel selection command, the controller 170 controls the broadcast signal receiver 110 to receive a broadcast signal provided from the selected channel through the broadcast signal receiver 110. In addition, the video signal and the audio signal of the selected channel may be processed and output to the display unit 180 or the sound output unit 185. In addition, the channel information selected by the user may be output through the display unit 180 or the audio output unit 185 together with the image signal and the audio signal.

The controller 170 may process the video signal or the audio signal based on information included in the data signal received together with the video signal or the audio signal. For example, the controller 170 may determine a format of a corresponding video signal using a data signal associated with the video signal input to the image display apparatus 100, and the image signal input to the image display apparatus 100 according to the format. Can be processed.

The controller 170 may generate an OSD signal that can display an OSD (On Screen Display) related to an image generated based on the image signal from the data signal related to the image signal. In addition, a graphic user interface may be generated so that a user may check related information on the image display apparatus 100 or input an image display apparatus control command to the image display apparatus 100.

The user may input another kind of video or audio output command through the remote control apparatus 200 or another kind of control command input means. For example, the user may want to watch a camera or camcorder video signal input through the external device input / output unit 130 instead of the broadcast signal. In this case, the controller 170 may output the video signal or the audio signal input through the USB input unit of the external device input / output unit 130 through the display unit 180 or the audio output unit 185. It can process the video signal or the audio signal input to.

The controller 170 of the present exemplary embodiment may process the image signal so that the 2D or 3D image signal input from the outside may be displayed on the display unit 180. In addition, the controller 170 may process the image signal such that the generated graphic user interface is displayed in three dimensions on the display unit 180. Detailed description of the control unit 170 will be described later with reference to FIG. 3.

The display unit 180 converts an image signal, a data signal, an OSD signal processed by the controller 170, or an image signal or data signal received through the external device input / output unit 130 into R, G, and B signals, respectively. To generate a drive signal. The display unit 180 may display a screen according to the generated driving signal. The display unit 180 may be a PDP, an LCD, an OLED, a flexible display, or the like. In addition, the image display apparatus 100 and the display unit 180 according to an exemplary embodiment of the present invention may perform a 3D display.

The 3D display may be divided into an additional display method and a single display method according to a method of recognizing a 3D image by a user.

The independent display method is a method in which a 3D image may be implemented on a display alone without a separate auxiliary device. A user viewing a display using a single display method can watch a 3D image without an additional device (eg, polarized glasses). The independent display may include a lenticular method and a parallax barrier.

The additional display method is a method of implementing a 3D image using an auxiliary device. Additional display methods may include a head mounted display (HMD) method, glasses method, and the like. In addition, polarizing glasses, shutter glasses, spectral filters, and the like may be applied to the glasses used in the spectacles.

Meanwhile, the display unit 180 may function as an input device as well as an output device by being configured as a touch screen.

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

3 is an internal block diagram of the controller 170 of the image display apparatus according to an exemplary embodiment.

The controller 170 may include a demodulator 171, a demultiplexer 172, a decoder 173, an OSD generator 174, and a formatter 175. The demodulator 171 may demodulate the broadcast signal received by the broadcast signal receiver 110.

For example, the demodulator 171 may perform a demodulation operation by receiving the digital IF signal DIF converted by the broadcast signal receiver 110. In addition, the demodulator 171 may perform channel decoding. To this end, the demodulator 171 may include a convolution decoder, a deinterleaver, a reed-soloman decoder, and the like to perform convolutional decoding, deinterleaving, and reed soloman decoding.

The demodulator 171 may output a stream signal TS after performing demodulation and channel decoding. The stream signal may be a signal multiplexed with a video signal, audio signal or data signal. For example, the stream signal may be an MPEG-2 Transport Stream (TS) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, and the like. Specifically, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

The demodulator 171 may be provided separately according to the ATSC method and the DVB method. The stream signal output from the demodulator 171 may be input to the demultiplexer 172.

The demultiplexer 172 may demultiplex the received stream signal, for example, the MPEG-2 TS, and divide the received stream signal into a video signal, an audio signal, and a data signal. The stream signal input to the demultiplexer 172 may be a stream signal output from the demodulator 171, the network interface 120, and the external device input / output unit 130.

The demultiplexed data signal may be an encoded data signal. The encoded data signal may include EPG (Electronic Progtam Guide) information including broadcast information such as a name, a start time, and an end time of a broadcast program broadcasted in each channel. For example, the EPG information may be TSC-PSIP (ATSC-Program and System Information Protocol) information in the ATSC scheme, and may include DVB-Service Information (DVB-SI) in the DVB scheme. .

The decoder 173 may decode the demultiplexed signal. The decoder 173 of the present exemplary embodiment includes a video decoder 173a for decoding the demultiplexed video signal and a scaler 173b for adjusting the resolution of the decoded video signal so that the resolution of the decoded video signal can be output from the video display device 100. Can be.

The OSD generator 174 may generate an OSD signal to display the object on the display 180 as an OSD. The OSD may indicate information related to an image displayed on the display unit 180. In addition, the OSD may include a user interface for receiving a control signal or a user command for controlling the operation of the image display apparatus 100.

The OSD generator 174 according to an exemplary embodiment of the present invention may extract a thumbnail image corresponding to a playback time of the content which is being played back or can be played back on the image display apparatus 100. The OSD generator 174 may generate an OSD signal and output the generated OSD signal to the formatter 175 so that the 3D object including the extracted thumbnail image may be recognized by the user.

The formatter 175 may determine the format of an input video signal by referring to a data signal related to the video signal. The formatter 175 may convert the input image signal into a format suitable for the display unit 180 and output the converted image signal to the display unit 180.

The image display apparatus 100 of the present exemplary embodiment may display a 3D image on the display unit 180. In this case, the formatter 175 may generate a 3D video signal according to a predetermined format suitable for displaying the input video signal on the display unit 180. In an embodiment of the present invention, the 3D video signal may include a left eye video signal and / or a right eye video signal. As described above, the left eye image and the right eye image may be used to implement the 3D image in the embodiment of the present invention. The left eye image signal may be a left eye image, and the right eye image signal may be an image signal for displaying a right eye image. The formatter 175 outputs the generated 3D image signal to the display unit 180. The display unit 180 displays a 3D image based on the generated 3D image signal.

In the present embodiment, the image display device 100 may display the OSD as a 3D object according to the OSD signal generated by the OSD generator 174. The formatter 175 displays the OSD signal generated by the OSD generator 173 so that the multi-view image constituting the 3D object, for example, the left eye image and the right eye image constituting the 3D object are displayed on the display unit 180. The 3D video signal may be converted into a 3D video signal in a format that can be displayed on the display unit 180 and output to the display unit 180.

The image display apparatus 100 having a user interface generator separately may mix a video signal output from the decoder 173 and the OSD generator 174 with a user interface video signal output from the user interface generator. It may further include. The mixer may be provided inside the formatter 175 to mix the image signals output from the decoder 173 and the OSD generator 174.

4 is a diagram illustrating an example of a 3D video signal format capable of implementing 3D video. The 3D video signal format may be determined according to a method of disposing a left eye image and a right eye image generated to implement a 3D image.

The 3D image may be composed of a multi-view image. The user may view the multi-view image through the left eye and the right eye. The user may feel a three-dimensional effect of the 3D image through the difference of the image detected through the left eye and the right eye. According to an embodiment of the present invention, a multi-view image for implementing a 3D image includes a left eye image that can be recognized by the user through the left eye and a right eye image that can be recognized through the right eye.

As shown in FIG. 4A, a method in which the left eye image and the right eye image are arranged left and right is referred to as a side by side format. As shown in FIG. 4B, a method of disposing the left eye image and the right eye image up and down is referred to as a top / down format. As shown in FIG. 4C, a method of time-divisionally arranging a left eye image and a right eye image is called a frame sequential format. As shown in FIG. 4D, a method of mixing the left eye image and the right eye image for each line is called an interlaced format. As shown in FIG. 4E, a method of mixing the left eye image and the right eye image for each box is called a checker box format.

The image signal included in the signal input to the image display apparatus 100 from the outside may be a 3D image signal capable of realizing a 3D image. In addition, the graphic user interface image signal generated to display the image display apparatus 100 related information or to input a command related to the image display apparatus 100 may be a 3D image signal. The formatter 175 may mix the 3D image signal and the graphic user interface 3D image signal included in the signal input to the image display apparatus 100 from the outside and output the mixed image to the display unit 180.

The formatter 175 may determine the format of the mixed 3D video signal by referring to a related data signal. The formatter 175 may process and output the 3D image signal to the display unit 180 so as to conform to the determined format. In addition, when the 3D video signal format that can be output from the display unit 180 is limited, the formatter 175 may adapt the received 3D video signal to the 3D video signal format that can be output from the display unit 180. The conversion may be output to the display unit 180.

The OSD generator 174 may generate an OSD signal. In detail, the OSD generator 174 is configured to display various types of information on a screen of the display 180 based on at least one of an image signal and a data signal, or a user input signal input through a remote control device or another type of control command input means. You can create a signal to display a graphic or text. In addition, the OSD generator 174 may generate a signal for displaying a graphic or text for inputting a control command to the image display apparatus 100. The generated OSD signal may be output to the display unit 180 along with the image processed image signal and the data processed data signal.

The OSD signal is a signal generated for graphic or text display and may include information about a user interface screen, various menu screens, widgets, icons, etc. which the display unit 180 can display. The OSD generator 174 may generate an OSD signal as a 2D video signal or a 3D video signal. The OSD signal generated by the OSD generator 174 may include a graphic user interface 3D video signal mixed with another video signal by the formatter 175.

The display unit 180 may display an object according to the OSD signal generated by the OSD generator 174. The object of the present embodiment may be one of a volume control button, a channel control button, an image display device control menu, an icon, a navigation tab, a scroll bar, a progressive bar, a text box, and a window.

Through the object displayed by the display unit 180, the user may recognize information about the image display apparatus 100 or information about an image displayed on the image display apparatus 100. In addition, a command may be input to the image display apparatus 100 through the object displayed on the image display apparatus 100. In the present specification, a 3D object is an object to which a stereo effect is applied to have a three-dimensional effect. The 3D object may be a picture in picture (PIP) image, an EPG representing broadcast program information, various menus, widgets, icons, etc. of an image display device.

FIG. 5 is a diagram illustrating various scaling methods of an 3D video signal or various shapes that an image may have according to an exemplary embodiment of the present invention. For adjusting the size or tilt of the 3D object, see FIG. 5.

The module for image processing such as the controller 170 or the scaler included in the controller 170 may enlarge or reduce the 3D image signal or the 3D object 510 in the 3D image signal at a predetermined ratio as shown in FIG. 513). This is a general function of image processing such as a scaler or a controller.

In addition, the controller 170 may generate or deform the screen into a polygon such as a trapezoid or a parallelogram in order to express the image rotated at a predetermined angle or inclined in a predetermined direction. An image signal processed in a parallelogram or trapezoid shape may be received for displaying a tilted or rotated screen. If a 3D image signal or a 3D object corresponding to an osd is generated in the controller and the corresponding 3D image signal is output to the display, the controller 170 displays the 3D object as a trapezoid (as shown in FIG. 5B). 516) or a parallelogram 519 as shown in (c) of FIG. 5.

3D object or 3D image such as an image received from a broadcasting station (see 210 in FIG. 1), a network server (see 230 in FIG. 1) or an external input device (see 230 in FIG. 1), or an OSD generated by the controller 170. As shown in (a) of FIG. 5, the shape of the trapezoid 516 or the parallelogram 519 is, of course, as shown in FIG. 5 (b) or FIG. 5 (c). When a 3D video signal or the like is generated or processed to have a 3D video signal or a 3D object in the 3D video signal, a 3D effect, or a 3D effect, may be more emphasized. In addition, this may act as a factor in diversifying and maximizing the stereoscopic sense of the image felt by the user.

And the slope effect or the rotation effect applied to the image according to the shape of the image, the difference in the length of the parallel sides of the trapezoidal shape 516 illustrated in (b) of Figure 5, or Figure 5 (c) It can be controlled by adding or subtracting the difference in the magnitude of the diagonal of the parallelogram 519 illustrated in FIG.

In this case, a tilting effect may occur because different parallax intervals are applied to each part even in one 3D image or 3D object. In other words, in order to make the image appear slanted or rotated, even in one 3D image or 3D object, a large depth portion and a small portion coexist, which means that the disparity interval is different for each pair of left and right eyes. It can be applied.

When one of the left eye image and the right eye image for displaying the 3D image or the 3D object is generated in the shape shown in FIG. 5 by the scaler or the OSD generator in the controller 170, the generated left eye or right eye image is copied. A binocular image may be generated by generating the other image.

Meanwhile, the scale adjustment of the 3D image signal or the 3D object may also be performed by the formatter 175 of the controller 170 described above. The 3D video signal of FIG. 5 may be a left eye video signal, a right eye video signal, or a signal in which a left eye video signal and a right eye video signal are combined.

The formatter 175 may receive the decoded video signal, separate the 2D video signal or the 3D video signal, and separate the 3D video signal into a left eye video signal and a right eye video signal. The left eye video signal and the right eye video signal may be scaled to one or more of the various examples shown in FIG. 5 and output in a predetermined format as shown in FIG. 4. Scaling can, on the other hand, be performed before or after the output format is formed.

In addition, the formatter 175 may receive an OSD signal of the OSD generator 174 or an OSD signal mixed with the decoded video signal, separate the 3D video signal, and separate the 3D video signal into a plurality of view video signals. . For example, the 3D video signal may be divided into a left eye video signal and a right eye video signal, and the separated left eye video signal and the right eye video signal may be scaled as shown in FIG. 5 and output in a predetermined format shown in FIG. 4. .

On the other hand, the OSD generator 174 may directly perform the above-described video signal generation or scaling process with respect to the OSD output. When the OSD generator 174 directly performs scaling on the OSD, the formatter 175 does not need to perform scaling on the OSD. In this case, the OSD generator 174 not only generates the OSD signal, but also scales the OSD signal according to the depth or slope of the OSD, and further outputs the OSD signal in a suitable format. In this case, the format of the OSD signal output from the OSD generator 174 may be any one of various combination formats of a left eye image signal and a right eye image signal, or a left eye image and a right eye image, as shown in FIG. 4. At this time, the output format is the same as the output format of the formatter 175.

6 is a view showing a state in which the depth of the 3D image or 3D object is variable according to an embodiment of the present invention.

According to an embodiment of the present invention described above, the 3D image is composed of a multiview image, wherein the multiview image may be illustrated as a left eye image and a right eye image. In this case, FIG. 6 illustrates a state in which a position recognized as an image is formed from a user's point of view is changed by a distance between a left eye image and a right eye image. Referring to FIG. 6, a stereoscopic or perspective view of an image felt by a user according to an interval or parallax between a left eye image and a right eye image will be described.

In FIG. 6, a plurality of images or objects having different depths are illustrated. These objects are referred to as a first object 615, a second object 625, a third object 635, and a fourth object 645.

That is, the first object 615 is composed of a first left eye image based on the first left eye image signal and a first right eye image based on the first right eye image signal. That is, the video signal for displaying the first object includes a first left eye video signal and a first right eye video signal. 6 illustrates at which position of the display unit 180 the first left eye image based on the first left eye image signal and the first right eye image based on the first right eye image signal are displayed. 6 illustrates a distance between the first left eye image and the first right eye image displayed on the display unit 180. The description of the first object may be applied to the second to fourth objects. Hereinafter, for convenience of description, a left eye image and a right eye image displayed on the display unit 180 for one object, an interval set between the two images, and a serial number of the corresponding object will be described.

The first object 615 includes a first right eye image 613 (indicated by R1 in FIG. 6) and a first left eye image 611 (indicated by L1 in FIG. 6). The interval between the first right eye image 613 and the first left eye image 611 is set to d1. The user recognizes that the extension occurs at the point where the extension line connecting the left eye 601 and the first left eye image 611 and the extension line connecting the right eye 603 and the first right eye image 603 cross each other. Accordingly, the user recognizes that the first object 615 is located behind the display unit 180. The distance between the display unit 180 and the first object 615 recognized by the user may be expressed as a depth. In the present exemplary embodiment, the depth of the 3D object recognized by the user, as located behind the display unit 180, has a negative value (−). Therefore, the depth of the first object 615 has a negative value.

The second object 625 is composed of a second right eye image (indicated by 623 and R2) and a second left eye image (indicated by 621 and L2). According to the present exemplary embodiment, the second right eye image 623 and the second left eye image 621 are displayed at the same position on the display unit 180. The interval between the second right eye image 623 and the second left eye image 621 is zero. The user recognizes that the extension line connecting the left eye 601 and the second left eye image 621 and the extension line connecting the user's right eye 603 and the second right eye image 623 cross each other. Accordingly, the user recognizes the second object 625 as if it is displayed on the display unit 180. In this case, the second object 625 may be referred to as a 2D object and may be referred to as a 3D object. The second object 625 is an object having the same depth as the display unit 180, and the depth of the second object 625 is zero.

The third object 635 and the fourth object 645 are examples for explaining 3D objects that are recognized as being protruded toward the user from the display unit 180. Furthermore, the degree of perspective or stereoscopic perception perceived by the user according to the change of the distance between the left eye image and the right eye image may be described with reference to the examples of the third object 635 and the fourth object 645.

The third object 635 includes a third right eye image 633 (denoted as R3) and a third left eye image 663 and denoted by L3. The interval between the third right eye image 633 and the third left eye image 631 is set to d3. The user recognizes that an extension line connecting the left eye 601 and the third left eye image 631 and the point where the extension lines of the right eye 603 and the third right eye image 633 cross each other. Accordingly, the user recognizes the third object 625 as if it is located in front of the display unit 180, that is, near the user. That is, the third object 635 is recognized by the user as if the display unit 180 protrudes toward the user. In the present exemplary embodiment, the depth of the 3D object recognized by the user, as located in front of the display unit 180, has a positive value (+). Thus, the depth of the third object 635 has a positive value.

The fourth object 645 is composed of a fourth right eye image (indicated by R3) and a fourth left eye image (indicated by 641 and L4). The interval between the fourth right eye image 643 and the fourth left eye image 641 is set to d4. Here, an inequality of 'd3 <d4' is established between d3 and d4. The user recognizes that an extension line connecting the left eye 601 and the fourth left eye image 641 and the extension line of the right eye 603 and the fourth right eye image 643 intersect. Accordingly, the user recognizes that the fourth object 645 is located in front of the display unit 180, that is, closer to the user, and closer to the user than the third object 635. That is, the fourth object 645 is recognized by the user as if the fourth object 645 is located protruding toward the user rather than the display unit 180 and the third object 635. The fourth object 645 has a depth positive value.

The image display apparatus 100 adjusts the positions of the left eye image and the right eye image displayed on the display unit 180 so that an object consisting of the left eye image and the right eye image is recognized or displayed to the user as if the object is located behind the display unit 180. It can be made known to the user as if it were located. In addition, the image display apparatus 100 may adjust the display interval of the left eye image and the right eye image displayed on the display unit 180 to adjust the depth of the object composed of the left eye image and the right eye image.

That is, according to the description with reference to FIG. 6, the depth of the object composed of the left eye image and the right eye image has a positive value (+) or a negative value (-) according to the left and right display positions of the left eye image and the right eye image. It can be seen that it is determined. As described above, the object having a positive value (+) having a depth is an object recognized by the user as if the object is protruded from the display unit 180. In addition, an object having a negative value (−) having a depth is an object recognized by the user as if it is located backward from the display unit 180.

6, the depth of the object, that is, the distance between the point recognized by the user as if the 3D image is located and the display unit 180 vary according to the absolute value of the distance between the left eye image and the right eye image. can do.

7 is a diagram illustrating a state in which a sense of depth of an image is controlled according to an embodiment of the present invention. Referring to FIG. 7, it can be seen that the depth of the same image or the same 3D object varies depending on the distance between the left eye image 701 and the right eye image 702 displayed on the display unit 180. In the present embodiment, the depth of the display unit 180 is set to zero. The depth of the image to be recognized as if protruding from the display unit 180 is set to have a positive value.

The interval between the left eye image 701 and the right eye image 702 illustrated in FIG. 7A is a. The interval between the left eye image 701 and the right eye image 702 illustrated in FIG. 7B is b. Where b is larger than aa. That is, in the example illustrated in FIG. 7B, the interval between the left eye image 701 and the right eye image 702 is wider than the example illustrated in FIG. 7A.

In this case, as described with reference to FIG. 6, the depth of the 3D image or the 3D object illustrated in FIG. 7B is greater than the depth of the 3D image or the 3D object illustrated in FIG. 7A. . In each case, when the depth is quantified and expressed as a 'and b', respectively, it can be seen that a '<b' relationship is also established according to a <b. In other words, when the 3D image is projected, the depth of the expression may be increased or decreased as the distance between the left eye image 701 and the right eye image 702 is increased or decreased.

8 is a diagram illustrating a screen of an image display apparatus to which an embodiment of the present invention is applied.

Referring to FIG. 8, after the operation of the formatter 175 is stopped, when the 3d image signal having a predetermined format is input, an afterimage generation form and an afterimage generation position 800 are illustrated. FIG. 8A illustrates the generation of afterimages when the format of the input image is the side by side method, and FIG. 8B illustrates the generation of afterimages when the format of the input image is the top-down method.

As described above, the format relates to a method of arranging a left eye image and a right eye image generated to implement a 3D image using a 3D image signal. In addition, the formatter 175 converts the input video signal into a format suitable for the display unit 180 and outputs it to the display unit 180, or the formatter 175 displays the input image signal on the display unit 180. The 3D video signal can be generated as a 3D video signal according to a predetermined format.

The format of the video signal includes the 3D format of the 3D video signal. Therefore, when the operation of the formatter 175 is stopped, the 3D image signal for the input image having a format that does not match the output format of the image display apparatus is directly passed through the image display apparatus without undergoing format conversion or regeneration of the 3D image signal. Can be output. In addition, input and output of a 3D video signal having a format unsuitable for the video display device may cause an afterimage.

There may be various factors in stopping the operation of the formatter 175. For example, when a 3D video signal is input in response to input of 3D content, but playback of the corresponding content is terminated and the formatter 175 is temporarily turned off, or playback of the 3D video temporarily occurs due to a channel change or content change. When the operation of the formatter is terminated and the operation of the formatter is stopped accordingly, the operation of the formatter 175 may be stopped when the user switches the setting of the image display apparatus to the 2D mode in order to reproduce 2D content.

After the operation of the formatter 175 is stopped due to the cause, the 3D video signal is continuously input. In particular, when the format of the 3D video signal is different from the format of the 3D output video supported by the video display device, the conversion to the 3D video is performed. It does not work normally, resulting in afterimages. For example, in the case of an input image having a side by side or top down format, the afterimage generating position 800 is between the left eye image and the right eye image.

The image display apparatus determines that the user is absent when the user is not watching the image through the image display apparatus or when the image display apparatus is left without the user. In addition, the image display apparatus may detect the absence and detect the absence by various methods, and change the format of the input 3D image to display the output image.

9 is a diagram illustrating a screen of an image display apparatus in which an afterimage is removed according to an exemplary embodiment of the present invention.

Referring to FIG. 9A, when an input 3D image is output as it is while an operation of a formatter is stopped and an afterimage occurs, a 3D image from which an afterimage is removed due to a format change is displayed.

The format of the input image 910 is the side by side format 915, and the format changed by the image display device is the top down format 925. That is, the format of the 3D image suitable for the display unit 180 of the image display apparatus is the top down format 925. When the input image of the side by side format 915 is output without passing through the formatter, afterimage may occur. However, according to an exemplary embodiment of the present invention, when the image including the afterimage is left unattended, the controller 170 arbitrarily selects an output format. When the formatter converts the input image into a format selected by the controller 170, the controller 170 may generate an output image from which afterimages are removed.

Referring to FIG. 9A, the input format of the input image 910 is a side by side format 915. The image display device generates a first output image 920 by changing the format of the input image 910 by the first output format, that is, the top down method 925, and outputs the first output image 920 by the top down method 925. ) The first output format may be the most suitable among 3D formats supported by the image display apparatus or may be a format set by default. Accordingly, it can be seen that an afterimage of the first output image 920 is removed.

Referring to FIG. 9B, the format of the input image 910 is a side by side method 915, which is the same as that of FIG. 9A. The image display device determines whether the user is absent and automatically changes the format of the input image 910. In this case, the changed format may be, for example, an output format of a 3D image which is basically supported by the image display apparatus. Here, the format of the input image 910 is changed to the second output format, that is, the checkerboard format 935 to generate the second output image 930. The display unit displays the second output image 930 according to the checkerboard format 935. Accordingly, an afterimage of the output image 930 may be removed.

10 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment.

First, the operation of the formatter 175 is stopped by various factors described above (S1010). In operation S1020, an input image is received. The input image is a 3D image having a predetermined format. It is assumed that both the input image and the output image described later are 3D images. The format herein may be a side by side format, a top / down format, a frame sequential format, an interlaced format, a checker box format, and the like.

It is determined whether the user is currently watching an image (S1030). There are various ways to determine whether a user is watching an image. First, in the case of a checkerboard format 3D image or a frame sequential format 3D image, it is difficult to see the image as it is for a long time, and when there is no input of the user signal for a predetermined time, it is easy to determine that the user is absent. Alternatively, the sensor may detect whether the user is located within a predetermined distance using a position sensor temperature sensor motion sensor.

The image display device receives a user's format selection signal through a user input interface unit such as a remote control unit interface unit 140 (S1040). When the format selection signal is input, the controller 170 operates the formatter 175 to convert the format of the input image. Accordingly, the formatter 175 converts the input image into a format corresponding to the format selection signal (S1050).

If it is determined that the user is not currently watching the video, the user cannot receive a format selection signal from the user. Since the output image including the afterimage is continuously displayed, in this case, the controller 170 operates the formatter 175 to convert the format of the input image. However, the formatter 175 converts the input image into a format arbitrarily selected by the controller 170, such as a format supported by the image display apparatus or a format most suitable for the display unit 180 (S1045).

The display unit 180 receives an image signal for the output image in which the format is converted from the controller 170 and then displays an output image for the playback portion (S1060).

11 is a flowchart illustrating a method of operating an image display apparatus according to another exemplary embodiment.

Similarly, in the embodiment described with reference to FIG. 11, the operation of the formatter may be temporarily stopped (S1110). In operation S1120, an input image that is a 3D image is received while the formatter does not operate. In this state, when the input and output of the 3D image is left to occur, an afterimage occurs in a specific area of the display unit 180.

First, the controller 170 determines whether the user is absent (S1130). If the image in which the afterimage occurs due to the user's absence is left, the format of the input image may be converted according to a preset setting. In addition, the display unit 180 displays an output image (S1150), where the output image is an image from which an afterimage is removed by a format conversion. Format conversion of the 3D image is performed by a formatter. If the user is not present, the user signal may be input for the user's format selection, and so the output image is displayed as it is without performing any format conversion first (S1150).

If the image display apparatus determines that the user is absent in the previous step, the user may be detected thereafter, and if the user exists but no signal is input from any user, the user may subsequently detect the input of the user signal (S1160). . As described above, when the format selection signal is the formatter 175 within a predetermined time after the input of the user or the user signal is detected, the formatter 175 may convert the input image into a format corresponding to the format selection signal (S1170).

That is, when the display of an output image having an afterimage is left unattended due to the absence of the user, even if the afterimage is removed by converting the input image to an arbitrary format, the image display apparatus is not selected by the user. In operation S1180, the input image for the remaining playback portion may be converted into the format. However, since the user cannot wait indefinitely for the user to input the format selection signal, if the format selection signal is not input within a predetermined time by driving the timer after the user or the user signal is captured, the control unit 170 continues to input the image in the format previously selected. The output is converted (S1190).

In addition, when it is determined that the user is not in the previous state but the user does not perform any operation while leaving the output image having an afterimage, the image display apparatus according to the embodiment described with reference to FIG. 11 first formats a 3D image. Provides output video without conversion. This is because it does not exclude the possibility of the user intentionally leaving the afterimage or the possibility of the user entering a user command regarding the format selection later.

However, according to another exemplary embodiment, if no command is input for a predetermined time even when the user is not present, the afterimage may be removed by automatically converting an input image, which is a 3D image, by selecting an appropriate format. Of course, the suitable format may be a format that is suitable for the display unit 180 of the image display apparatus, such as a format supported by the formatter of the image display apparatus, a format set as a default.

The display unit 180 displays an output image of the remaining portion (S1190). Herein, the output image of the remaining portion corresponds to a portion after a point in time when a predetermined time elapses without an input of an output image or a format select signal in which the format of the input image is converted with respect to a portion after the point in time when the format selection signal is input. It may be an output image.

As described above, by using the image display apparatus or the operating method thereof, the afterimage occurring in the 3D image may be removed by detecting and considering whether the formatter 175 is operated and whether the user is watching.

On the other hand, the image display device and its operation method according to the present invention is not limited to the configuration and method of the embodiments described as described above, the embodiments are all of the embodiments so that various modifications can be made Or some may be selectively combined.

The operating method of the image display device of the present invention can be implemented as processor readable codes on a processor readable recording medium included in the image display device. The processor-readable recording medium includes all kinds of recording devices that store data that can be read by the processor. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like, and also include a carrier wave such as transmission through the Internet. The processor-readable recording medium can also be distributed over network coupled computer systems so that the processor-readable code is stored and executed in a distributed fashion.

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.

100: video display device
110: broadcast signal receiver
120: network interface unit
130: external device input and output unit
140: mass control unit remote control
150: storage unit
170:
175: formatter
180: display unit
185: sound output unit
200: remote control device
210: broadcasting station
220: network server

Claims (14)

In the operating method of the video display device capable of playing back 3D video,
Receiving a 3D input image after the operation of the formatter for generating a 3D image signal or converting the format of the 3D image in a format supported for output through the image display apparatus when the 3D image is played back; ;
Generating a 3D output image by converting the 3D input image into a format supported by the image display apparatus by driving the formatter when the format of the 3D input image is different from the format supported by the image display apparatus; And
And displaying the 3D output image. The method of claim 1,
The format of the 3D input image is any one of a side by side format, a top / down format, a frame sequential format, an interlaced format, and a checker box format. The format of the 3D output image is any one of a side by side format, a top down format, a frame sequential format, an interlace format, and a checker box format, which is different from the format of the 3D input image. . The method of claim 1,
Before generating the 3D output image,
Determining whether the user of the image display apparatus is absent;
And when the user is determined to be absent, converts the 3D input image into the format. The method of claim 3,
Determining whether the user is absent,
And if a user signal is not input within a preset time period, determining that the user is absent. The method of claim 3,
Determining whether the user is absent,
And determining whether the user exists within a predetermined distance from the image display apparatus using at least one of a motion sensor, a position sensor, a temperature sensor, and a camera. The method of claim 1,
After receiving the 3D input image,
Receiving a format selection signal;
And converting the 3D input image into a format supported by the image display apparatus among the formats according to the format selection signal. The method of claim 1,
Receiving a format selection signal after displaying the 3D output image;
And converting a format of the 3D input image received by the image display apparatus into a format corresponding to the format selection signal after the format selection signal is input. In the video display device capable of playing 3D video,
A formatter for generating a 3D video signal or converting the format of the 3D video to a format supported for outputting the 3D video when the 3D video is played back;
An image signal input unit configured to receive a 3D input image after the operation of the formatter is temporarily stopped;
A controller configured to generate a 3D output image by converting the 3D input image into a format supported by the image display apparatus by driving the formatter when the format of the 3D input image is different from the format supported by the image display apparatus; And
And a display unit for displaying the 3D output image. The method of claim 8,
The format of the 3D input image may be any one of a side by side format, a top / down format, a frame sequential format, an interlaced format, and a checker box format. And wherein the format of the 3D output image is any one of a side by side format, a top down format, a frame sequential format, an interlace format, and a checker box format. The method of claim 8,
The controller determines whether the user of the image display apparatus is absent before generating the 3D output image.
And when the controller determines that the user is absent, the formatter converts the 3D input image into the format. The method of claim 10,
And if the user signal is not input within a predetermined time period, the controller determines that the user is absent. The method of claim 10,
It further includes one or more of a motion sensor, a position sensor, a temperature sensor, a camera,
The controller may determine that the user is absent when the user is not detected within a predetermined distance using one or more of the motion sensor, the position sensor, the temperature sensor, and the camera. . The method of claim 8,
After receiving the 3D input image,
Further comprising a user input interface for receiving a format selection signal,
And the formatter converts the 3D input image into a format supported by the formatter among the formats selected by the format selection signal. The method of claim 8,
After displaying the 3D output image, further comprising a user input interface for receiving a format selection signal,
And the formatter converts the 3D input image received in the image signal input unit into a format corresponding to the format selection signal after the format selection signal is input.

Images