KR20160084655A - Image display apparatus - Google Patents

Abstract

The present invention relates to an image display device. The image display device according to an embodiment of the present invention includes a panel, backlight lamps which output light to the panel, an image receiving part which receives a multi-image from image sources, and a control part which separates the multi-image received from the image receiving part according to a multi-image display input and controls local dimming on separated multi-images, respectively. Thereby, the local dimming according to the multi-image can be carried out when the multi-image is displayed.

Description

[0001] The present invention relates to an image display apparatus,

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 performing local dimming for multiple images in multi-image display.

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.

On the other hand, the resolution of a video display device is increasing according to a demand of a user who wants to watch a clear screen, and accordingly, a video display device with an increased resolution has been developed.

It is an object of the present invention to provide an image display apparatus capable of performing local dimming for multi-image in multi-image display.

According to an aspect of the present invention, there is provided an image display apparatus including a panel, a plurality of backlight lamps for outputting light to the panel, an image receiver for receiving multi-images from a plurality of image sources, And a control unit for separating the multi-images received from the image receiving unit according to the input and controlling the local dimming for each of the separated multi-images.

According to another aspect of the present invention, there is provided an image display apparatus including a panel, a plurality of backlight lamps for outputting light to the panel, an image receiving unit for receiving multi-images from a plurality of image sources, According to the multi-image display input, the multi-image received from the image receiving unit is separated, the average luminance value of each separated multi-image is calculated, and the clipping of the multi-image luminance value is performed based on the average luminance value of each multi- And controls the backlight lamp to be driven based on the luminance value clipped by each of the multiple images.

According to another aspect of the present invention, there is provided an image display apparatus including a panel, a plurality of backlight lamps for outputting light to the panel, an image receiving unit for receiving multi-images from a plurality of image sources, , When a mean brightness value of a single image including a multi-image is a first predetermined value and an average brightness value of the first image among the multi-images is a second predetermined value smaller than the first predetermined value, And a control unit for controlling the luminance of the black image to be smaller than that of black for the other images in the multi image.

According to an embodiment of the present invention, an image display apparatus includes a panel, a plurality of backlight lamps for outputting light to the panel, an image receiving unit for receiving multi-images from a plurality of image sources, And a control unit for separating the multi-images received from the image receiving unit and controlling the local dimming for each of the separated multi-images, thereby performing local dimming for each of the multi-images during multi-image display. That is, the brightness expressing power or contrast per multi-image is increased. Accordingly, it is possible to solve the heterogeneity of the multi-image and improve the overall image quality.

According to another aspect of the present invention, there is provided an image display apparatus including a panel, a plurality of backlight lamps for outputting light to the panel, an image receiving unit for receiving multi-images from a plurality of image sources, Accordingly, it is possible to separate the multi-images received from the image receiving unit, calculate the average luminance values of the separated multi-images, perform clipping on the multi-image luminance values based on the average luminance values of the multi- And a control unit for controlling the backlight lamp to be driven based on the clipped luminance value. Thus, it is possible to perform local dimming for each of multiple images in multi-image display. That is, the brightness expressing power or contrast per multi-image is increased. Accordingly, it is possible to solve the heterogeneity of the multi-image and improve the overall image quality.

According to another embodiment of the present invention, an image display apparatus includes a panel, a plurality of backlight lamps for outputting light to the panel, an image receiving unit for receiving multi-images from a plurality of image sources, The first luminance value of the first image is smaller than the first predetermined value and the average luminance value of the first image is smaller than the first predetermined value, And a control unit for controlling the luminance of each of the plurality of images to be smaller than the luminance of black for the other images. That is, the brightness expressing power or contrast per multi-image is increased. Accordingly, it is possible to solve the heterogeneity of the multi-image and improve the overall image quality.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an appearance of a video display device according to an embodiment of the present invention; FIG.
2 is an example of an internal block diagram of the video display device of FIG.
3 is an internal block diagram of the first control unit of FIG.
FIG. 4 is a diagram showing a control method of the remote control apparatus of FIG. 2. FIG.
5 is an internal block diagram of the remote control device of Fig.
FIG. 6 is a view showing an example of the power supply unit and the display of FIG. 2; FIG.
Figures 7A-7C are diagrams illustrating various examples of the arrangement of the backlight lamp of Figure 6;
8 is a flowchart illustrating an operation method of an image display apparatus according to an embodiment of the present invention.
9 to 16 are views referred to in the description of the operation method of FIG.

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.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an appearance of a video display device according to an embodiment of the present invention; FIG.

Referring to FIG. 1, an image display apparatus 100 according to an exemplary embodiment of the present invention includes a display (180 in FIG. 2), a controller (170 in FIG. 2) .

The display (180 in Fig. 2) may include a display panel (210 in Fig. 6) and a plurality of backlight lamps (252 in Fig. 6) for outputting light to the display panel.

In the display (180 in FIG. 2) provided with a plurality of backlight lamps, local dimming can be performed to improve contrast and the like in displaying black of an image.

On the other hand, in a trend of increasing the resolution of the image display apparatus 100, particularly the display 180, to HD (High Definition), Full HD, UHD (Ultra High Definition), 4K, The number of displayable images can be increased. For example, the video display device 100 of the UHD can display four HD video images.

Accordingly, the image display apparatus 100 can mix and display multi-images received by the image receiving unit 105 (FIG. 2) into one single image according to the multi-image display input.

In this case, when the multi-image is displayed as one single image, when the multi-image is regarded as one single image and local dimming or the like is performed, due to the multi-image having different brightness or the like, A video image may be displayed or deterioration of image quality may occur.

In the embodiment of the present invention, in order to improve this point, in the image display apparatus 100, local dimming is performed for each of the separated multi-images in accordance with the multi-image display input. Accordingly, it is possible to solve the heterogeneity of the multi-image and improve the overall image quality.

For example, the image display apparatus 100 may display backlight control data for controlling the backlight lamp, based on at least one of the luminance value or the dimming value of the separated multi-image, using a plurality of backlight lamps (252 in Fig. 6) .

Specifically, in the image display apparatus 100, when the average luminance value of the first image in the multi-image is smaller than the first predetermined value in a state in which the average luminance value of the single image including the multi- 2, it is possible to have a luminance lower than that of black for other images in the multi-image when displaying black for the first image among the multi-images. Accordingly, it is possible to solve the heterogeneity of the multi-image and improve the overall image quality.

Also, in the image display apparatus 100, when the average luminance value of the first image in the multi-image is larger than the third predetermined value in a state where the average luminance value of the single image including the multi- 4, it may be possible to have a luminance greater than that of black for other images in the multi-image when the first image in the multi-image is displayed in black. Accordingly, it is possible to solve the heterogeneity of the multi-image and improve the overall image quality.

Meanwhile, in another embodiment of the present invention, the image display apparatus 100 separates received multi-images according to a multi-image display input, calculates an average luminance value for each of the separated multi-images, Clipping is performed on the brightness value of the multi-image, and the backlight lamp can be driven based on the brightness value clipped on a multi-image basis.

Meanwhile, various embodiments of the present invention will be described in detail with reference to FIG. 8 and the following figures.

2 is an example of an internal block diagram of the video display device of FIG.

2, an image display apparatus 100 according to an exemplary embodiment of the present invention includes an image receiving unit 105, an external device interface unit 130, a storage unit 140, a user input interface unit 150, (Not shown), a first controller 170, a second controller 175, a display 180, and an audio output unit 185.

The image receiving unit 105 may include a tuner unit 110, a demodulation unit 120, a network interface unit 135, and an external device interface unit 130.

That is, the image receiving unit 105 can receive a multi-image from the outside. Specifically, a broadcast image from the tuner unit 110, a stream image from the network interface unit 135, and an external input image from the external device interface unit 130 can be received.

On the other hand, the multi-image from the image receiving unit 105 can be transmitted to the first controller 170.

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 50. 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 may be directly input to the first controller 170.

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.

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.

The stream signal output from the demodulation unit 120 may be input to the first control unit 170. The first controller 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 such as a DVD (Digital Versatile Disk), a Blu ray, a game device, a camera, a camcorder, a computer , And may perform an input / output operation with an external device.

The A / V input / output unit can receive video and audio signals from an external device. Meanwhile, the wireless communication unit can perform short-range wireless communication with other electronic devices.

The network interface unit 135 provides an interface for connecting the video display device 100 to a wired / wireless network including the Internet network. For example, the network interface unit 135 can receive, via the network, content or data provided by the Internet or a content provider or a network operator.

The storage unit 140 may store a program for each signal processing and control in the first control unit 170 or the second control unit 175 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.

Although the storage unit 140 of FIG. 2 is provided separately from the first control unit 170, the scope of the present invention is not limited thereto. The storage unit 140 may be included in the first controller 170.

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

(Not shown), such as a power key, a channel key, a volume key, and a set value, from the remote control apparatus 200, (Not shown) that senses a gesture of a user to the first controller 170 or transmits a user input signal input from the first controller 170 to the first controller 170, 170 to the sensor unit (not shown).

The first 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 to output video or audio output Lt; RTI ID = 0.0 > and / or < / RTI >

In particular, the first control unit 170 can mix and output the multi-images from the image receiving unit 105 into one single image. To this end, the first controller 170 scales each image and mixes the images into one single image.

The first control unit 170 will be described in more detail with reference to FIG. 3 and subsequent figures.

On the other hand, the second control unit 170 can perform signal processing for receiving an image from the first control unit 170 and displaying it on the display 180. [

In particular, when receiving a single image including multi-images from the first controller 170, the multi-images can be separated. In addition, signal processing can be performed for each multi-image.

Particularly, according to the embodiment of the present invention, local dimming can be controlled to be performed for each multi-image.

Specifically, the second controller 175 can separate the multi-images received from the image receiving unit according to the multi-image display input, and control the local dimming for each of the separated multi-images.

Alternatively, the second control unit 175 may divide the multi-image received from the image receiving unit in accordance with the multi-image display input, calculate the average luminance value for each of the separated multi-images, and, based on the average luminance value for each multi- Clipping is performed on the luminance value of the multi-image, and it is possible to control the backlight lamp (252 in Fig. 6) to be driven based on the luminance value clipped on a multi-image basis.

Alternatively, the second control unit 175 may determine whether the average brightness value of the first image in the multi-image is smaller than the first predetermined value, in a state where the average brightness value of the single image including the multi- , It is possible to control the brightness of the first image in the black image to be smaller than that of the black image of the other images in the multi image.

Meanwhile, the first controller 170 may perform audio signal processing. The audio signal processed by the first control unit 170 is transmitted to the audio output unit 185 and can be output through the audio output unit 185.

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

In addition, the first 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.

On the other hand, the first control unit 170 can recognize 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 stream-decoded together with a decoded image and input to the first controller 170. The first controller 170 may control the display 180 to display a thumbnail list including a plurality of thumbnail images using the input thumbnail image.

The display 180 displays a predetermined image according to a video signal processed by the second controller 175 or the like.

On the other hand, the display 180 may include a display panel (210 in FIG. 6) and a plurality of backlight lamps (252 in FIG. 6).

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 may receive the audio signal processed by the first control unit 170 and output a corresponding sound.

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 embedded in the image display device 100 on the upper side of the display 180 or may be disposed separately. The image information photographed by the photographing unit (not shown) may be input to the first control unit 170.

The first control unit 170 can sense the gesture of the user based on the image photographed by the photographing unit (not shown) or the detected signal from the sensor unit (not shown) or a combination thereof.

The power supply unit 190 supplies power to the entire image display apparatus 100. Particularly, a power source is supplied to a first control unit 170, a display 180 for displaying an image, and an audio output unit 185 for audio output, which can be implemented in the form of a system on chip (SOC) Can supply.

Specifically, the power supply unit 190 may include a converter for converting AC power into DC power and a dc / dc converter for converting the level of the DC power.

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.

Meanwhile, the video display device 100 may be a digital broadcast receiver capable of receiving a fixed or mobile digital broadcast.

Meanwhile, a block diagram of the image display apparatus 100 shown in FIG. 2 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.

2, the image display apparatus 100 does not include the tuner unit 110 and the demodulation unit 120 shown in FIG. 2, but may be a network interface unit 135 or an external device interface unit 130 to play back the video content.

On the other hand, the image display apparatus 100 is an example of a video signal processing apparatus that performs signal processing of an image stored in the apparatus or an input image. Another example of the image signal processing apparatus includes a display 180 shown in FIG. 2, A set-top box excluding the audio output unit 185, a DVD player, a Blu-ray player, a game machine, a computer, and the like may be further exemplified.

3 is an internal block diagram of the first control unit of FIG.

The first controller 170 according to an exemplary embodiment of the present invention includes a demultiplexer 310, an image processor 320, a processor 330, an OSD generator 340, a mixer 345, a frame rate conversion unit 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. For this, the image processing unit 320 may include a video decoder 325 and a scaler 335.

The video decoder 325 decodes the demultiplexed video signal and the scaler 335 performs scaling so that the resolution of the decoded video signal can be output from the display 180.

The video decoder 325 can include a decoder of various standards.

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-point image signals. The plurality of viewpoint image signals may include, for example, a left eye image signal and a right eye image signal.

Here, the format of the 3D video signal is a side-by-side format in which the left-eye image signal L and the right-eye image signal R are arranged in left and right directions, a top- An interlaced format in which the left and right eye image signals and the right eye image signal are mixed line by line, a checker box for mixing the left eye image signal and the right eye image signal box by box, Format, and the like.

The processor 330 may control overall operation in the image display apparatus 100 or in the first control unit 170. [ For example, the processor 330 may control the tuner 110 to select a channel selected by the user or an RF broadcast corresponding to a previously stored channel.

In addition, the processor 330 may control the image display apparatus 100 by a user command or an internal program input through the user input interface unit 150. [

In addition, the processor 330 may perform data transfer control with the network interface unit 135 or the external device interface unit 130.

The processor 330 may control operations of the demultiplexing unit 310, the image processing unit 320, the OSD generating unit 340, and the like in the first control unit 170.

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 OSD generating unit 340 can generate a pointer that can be displayed on the display based on the pointing signal input from the remote control device 200. [ In particular, such a pointer may be generated by a pointing signal processing unit, and the OSD generating unit 240 may include such a pointing signal processing unit (not shown). Of course, a pointing signal processing unit (not shown) may be provided separately from the OSD generating unit 240.

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 can convert the frame rate of an input image. On the other hand, the frame rate converter 350 can output the frame rate without conversion.

The formatter 360 may arrange the left eye image frame and the right eye image frame of the frame rate-converted 3D image. Then, the left eye glass of the 3D viewing apparatus (not shown) 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.

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 the various formats described above.

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. [

Meanwhile, the audio processing unit (not shown) in the first 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.

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

A data processing unit (not shown) in the first 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.

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 first controller 170 shown in FIG. 3 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 first controller 170 actually implemented.

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

FIG. 4 is a diagram showing a control method of the remote control apparatus of FIG. 2. FIG.

4A, it is exemplified that a pointer 205 corresponding to the remote control device 200 is displayed on the display 180. In the example of FIG.

The user can move or rotate the remote control device 200 up and down, left and right (FIG. 4B), and back and forth (FIG. 4C). The pointer 205 displayed on the display 180 of the video display device corresponds to the movement of the remote control device 200. [ As shown in the figure, the remote controller 200 can be referred to as a space remote controller or a 3D pointing device because the pointer 205 is moved and displayed according to the movement in the 3D space.

4B illustrates that when the user moves the remote control device 200 to the left, the pointer 205 displayed on the display 180 of the image display device also shifts to the left corresponding thereto.

Information on the motion of the remote control device 200 sensed through the sensor of the remote control device 200 is transmitted to the image display device. The image display apparatus can calculate the coordinates of the pointer 205 from the information on the motion of the remote control apparatus 200. [ The image display apparatus can display the pointer 205 so as to correspond to the calculated coordinates.

4C illustrates a case where the user moves the remote control device 200 away from the display 180 while pressing a specific button in the remote control device 200. [ Thereby, the selected area in the display 180 corresponding to the pointer 205 can be zoomed in and displayed. Conversely, when the user moves the remote control device 200 close to the display 180, the selection area within the display 180 corresponding to the pointer 205 may be zoomed out and zoomed out. On the other hand, when the remote control device 200 moves away from the display 180, the selection area is zoomed out, and when the remote control device 200 approaches the display 180, the selection area may be zoomed in.

On the other hand, when the specific button in the remote control device 200 is pressed, it is possible to exclude recognizing the up, down, left, and right movement. That is, when the remote control apparatus 200 moves away from or approaches the display 180, it is not recognized that the up, down, left, and right movements are recognized, and only the forward and backward movements are recognized. Only the pointer 205 is moved in accordance with the upward, downward, leftward, and rightward movement of the remote control device 200 in a state where the specific button in the remote control device 200 is not pressed.

On the other hand, the moving speed and moving direction of the pointer 205 may correspond to the moving speed and moving direction of the remote control device 200.

5 is an internal block diagram of the remote control device of Fig.

The remote control device 200 includes a wireless communication unit 425, a user input unit 435, a sensor unit 440, an output unit 450, a power supply unit 460, a storage unit 470, And a control unit 480.

The wireless communication unit 425 transmits / receives a signal to / from any one of the video display devices according to the embodiments of the present invention described above. Of the video display devices according to the embodiments of the present invention, one video display device 100 will be described as an example.

In this embodiment, the remote control apparatus 200 may include an RF module 421 capable of transmitting and receiving signals with the image display apparatus 100 according to the RF communication standard. In addition, the remote control apparatus 200 may include an IR module 423 capable of transmitting and receiving signals to and from the image display apparatus 100 according to the IR communication standard.

In the present embodiment, the remote control device 200 transmits a signal containing information on the motion and the like of the remote control device 200 to the image display device 100 through the RF module 421.

Also, the remote control device 200 can receive the signal transmitted by the video display device 100 through the RF module 421. [ In addition, the remote control device 200 can transmit a command regarding power on / off, channel change, volume change, and the like to the video display device 100 through the IR module 423 as necessary.

The user input unit 435 may include a keypad, a button, a touch pad, or a touch screen. The user can input a command related to the image display apparatus 100 to the remote control apparatus 200 by operating the user input unit 435. [ When the user input unit 435 has a hard key button, the user can input a command related to the image display device 100 to the remote control device 200 through the push operation of the hard key button. When the user input unit 435 includes a touch screen, the user can touch a soft key of the touch screen to input a command related to the image display apparatus 100 to the remote control apparatus 200. [ In addition, the user input unit 435 may include various types of input means such as a scroll key, a jog key, etc., which can be operated by the user, and the present invention is not limited to the scope of the present invention.

The sensor unit 440 may include a gyro sensor 441 or an acceleration sensor 443. The gyro sensor 441 can sense information about the motion of the remote control device 200. [

For example, the gyro sensor 441 can sense information about the operation of the remote control device 200 based on the x, y, and z axes. The acceleration sensor 443 can sense information on the moving speed and the like of the remote control device 200. On the other hand, a distance measuring sensor can be further provided, whereby the distance to the display 180 can be sensed.

The output unit 450 may output an image or a voice signal corresponding to the operation of the user input unit 435 or corresponding to the signal transmitted from the image display apparatus 100. [ The user can recognize whether the user input unit 435 is operated or whether the image display apparatus 100 is controlled through the output unit 450.

For example, the output unit 450 includes an LED module 451 that is turned on when a user input unit 435 is operated or a signal is transmitted / received to / from the video display device 100 through the wireless communication unit 425, a vibration module 453 for outputting sound, an audio output module 455 for outputting sound, or a display module 457 for outputting an image.

The power supply unit 460 supplies power to the remote control device 200. The power supply unit 460 can reduce power waste by interrupting the power supply when the remote controller 200 is not moving for a predetermined period of time. The power supply unit 460 may resume power supply when a predetermined key provided in the remote control device 200 is operated.

The storage unit 470 may store various types of programs, application data, and the like necessary for the control or operation of the remote control apparatus 200. [ If the remote control device 200 wirelessly transmits and receives a signal through the image display device 100 and the RF module 421, the remote control device 200 and the image display device 100 transmit signals through a predetermined frequency band Send and receive. The control unit 480 of the remote control device 200 stores information on the frequency band and the like capable of wirelessly transmitting and receiving signals with the video display device 100 paired with the remote control device 200 in the storage unit 470 Can be referenced.

The control unit 480 controls various items related to the control of the remote control device 200. The control unit 480 transmits a signal corresponding to a predetermined key operation of the user input unit 435 or a signal corresponding to the motion of the remote control device 200 sensed by the sensor unit 440 through the wireless communication unit 425, (100).

The user input interface unit 150 of the image display apparatus 100 includes a wireless communication unit 151 capable of wirelessly transmitting and receiving signals to and from the remote control apparatus 200 and a pointer corresponding to the operation of the remote control apparatus 200. [ And a coordinate value calculation unit 415 that can calculate the coordinate value of the coordinate system.

The user input interface unit 150 can wirelessly transmit and receive signals to and from the remote control device 200 through the RF module 412. Also, the remote control device 200 can receive a signal transmitted through the IR module 413 according to the IR communication standard.

The coordinate value calculator 415 corrects the camera shake or error from the signal corresponding to the operation of the remote controller 200 received via the wireless communication unit 151 and outputs the coordinate value of the pointer 202 to be displayed on the display 170 (x, y) can be calculated.

The transmission signal of the remote control device 200 inputted to the image display device 100 through the user input interface unit 150 is transmitted to the control unit 180 of the image display device 100. [ The control unit 180 can determine the information about the operation of the remote control device 200 and the key operation from the signal transmitted from the remote control device 200 and control the video display device 100 accordingly.

As another example, the remote control device 200 may calculate the pointer coordinate value corresponding to the operation and output it to the user input interface unit 150 of the video display device 100. [ In this case, the user input interface unit 150 of the image display apparatus 100 may transmit information on the received pointer coordinate values to the control unit 180 without any additional camera shake or error correction process.

Alternatively, as another example, the coordinate value calculating unit 415 may be provided in the first control unit 170 instead of the user input interface unit 150, unlike the drawing.

FIG. 6 is a view showing an example of the power supply unit and the display of FIG. 2; FIG.

A display 180 based on a liquid crystal panel (LCD panel) may include a liquid crystal panel 210, a driving circuit unit 230, and a backlight unit 250.

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 second control unit 175 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 a control signal from the second controller 175 and R, G, and B data signals, a vertical synchronization signal Vsync, and the like, and supplies 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 250 supplies light to the liquid crystal panel 210. To this end, the backlight unit 250 includes a plurality of backlight lamps 252 as a light source, a scan driver 254 for controlling the scanning drive of the backlight lamp 252, And a ramp driver 256 which is turned off.

A predetermined image is displayed using the light emitted from the backlight unit 250 in a state in which the light transmittance of the liquid crystal layer is adjusted 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 250 can be supplied with driving power for driving the backlight lamp 252. [

Figures 7A-7C are diagrams illustrating various examples of the arrangement of the backlight lamp of Figure 6;

First, FIG. 7A illustrates a plurality of backlight lamps 252-1, 252-2, 253-3, and 25-4 disposed on the rear, upper, and lower sides of the liquid crystal panel 210. FIG. The backlight lamps 252-1, 252-2, 253-3, and 25-4 may include a plurality of LEDs (light emitting diodes).

Next, FIG. 7B illustrates a plurality of backlight lamps 252-1, 252-2, 253-3, 252-4, 252-5, and 25-6 disposed on the rear, upper, lower, and central sides of the liquid crystal panel 210. FIG. The backlight lamps 252-1, 252-2, 253-3, 252-4, 252-5, and 25-6 may include a plurality of LEDs (light emitting diodes).

Next, Fig. 7C shows a plurality of backlight lamps 252-1, 252-2, 253-3, and 25-4 disposed on the upper and lower sides of the rear surface of the liquid crystal panel 210, and a plurality of The backlight lamps 252-a, 252-b, 252-c and 252-d are exemplified. The backlight lamp may have a plurality of LEDs (light emitting diodes).

FIG. 8 is a flowchart illustrating an operation method of an image display apparatus according to an embodiment of the present invention, and FIGS. 9 to 16 are views referencing the operation method description of FIG.

8, the first controller 170 of the image display apparatus 100 determines whether there is a multi-image display input according to a user input signal input through the user input interface unit 150 (S805). Then, if applicable, multi-image is received.

For example, when a multi-image display key (not shown) of the remote control apparatus 200 is operated or a multi-image display item is selected through a menu displayed on the display 180, The first control unit 170 can determine that there is a multi-image display input.

When there is a multi-image display input, the image receiving unit 105 of the image display apparatus 100 can receive multi-images.

For example, the image receiving unit 105 receives the broadcast image through the broadcast receiving unit 110 and receives the game image from the game device (not shown) through the first HDMI terminal of the external device interface unit 130 And receives the optical disc playback image from the optical disc playback apparatus (not shown) through the second HDMI terminal of the external device interface unit 130, and receives the PC image from the computer via the RGB terminal.

The first controller 170 may receive the multi-image and combine it into one single image and output it. For this purpose, it is possible to perform scaling for each of a broadcast image, a game image, an optical disk playback image, and a PC image, and perform mixing after scaling.

9 is a diagram referred to for describing the operation of the first control unit 170 for multi-image synthesis.

Referring to the drawing, the image receiving unit 105 includes a tuner unit 110, an HDMI terminal 130a, an RGB terminal 130b, a miracast receiving unit 130c, a Wi-Fi receiving unit 130d, can do.

For example, in the image receiving unit 105, the broadcast image from the tuner unit 110, the game image through the HDMI terminal 130a, the optical disk reproduced image through the HDMI terminal 130a, and the RGB terminal 130b Lt; / RTI > can be received.

Meanwhile, a broadcast image, a game image, an optical disc playback image, and a PC image are separated from each other by a signal separator 310a.

Then, an input detector 312 detects information from each image. For example, image information such as resolution and frequency of each image can be detected.

The window splitter 314 cuts each image into a predetermined window size based on the image information from each image.

Next, the plurality of scalers 335a, 335b, ... perform scaling for each image cut to a predetermined size.

On the other hand, the window splitter and the scaler can be implemented as one. That is, after scaling, it is also possible that the image is cut off.

Next, a window merger combines a plurality of scaled images. Accordingly, a single image having multiple images can be synthesized and output.

Next, the second control unit 170 of the image display apparatus 100 can separate the multi-image from the single image including the multi-image from the first control unit 170 (S815).

The second controller 170 can further receive the source information, the size information, the position information, and the like of the multi-image in the single image, in addition to the single image, from the first controller 170.

Then, the second control unit 170 can separate each image from the single image based on at least one of the source information, the size information of the multi-image, and the position information. Accordingly, broadcast video, game video, optical disk playback video, and PC video can be separated.

Next, the second controller 170 calculates the average brightness per multi-image (S820). Then, clipping is performed on the luminance value of the multi-image based on the average luminance value for each multi-image (S8225), and the backlight lamp is driven based on the luminance value clipped for each multi-image (S830).

Steps 820 to 830 (S830) relate to local dimming per multi-image according to an embodiment of the present invention, which will be described with reference to FIG.

10 is an example of an internal block diagram of the second control unit 175. As shown in FIG.

Referring to FIG. 10, the second controller 175 of FIG. 10 separates the multiview received from the image receiving unit according to the multiview display input, and controls the local dimming for each of the separated multiview images have.

Specifically, the second controller 175 separates the multi-image from the single image 1800 including the multi-image, calculates the average luminance value for each of the separated multi-images, and, based on the average luminance value for each multi- Clipping is performed on the luminance values of the multi-image, and the backlight lamp is driven based on the luminance values clipped by the multi-image.

For this, the second controller 175 includes a multi-image separator 1010, an average luminance calculator 1015, a clipping unit 1020, a pixel compensator 1025, a dimming value determiner 1030, And a data generation unit 1035.

The multi-image separation unit 1010 can separate a multi-image from a single image 1800 including a multi-image. When the size information, the position information, and the like for each multi-image are received from the first controller 170, the respective images can be separated based on size information, position information, and the like.

The average luminance calculator 1015 can calculate an average luminance value for each of the separated multi-images.

The clipping unit 1020 can perform clipping on the luminance value of the multi-image based on the average luminance value per multi-image.

For example, the clipping unit 1020 can set the clipping value so that, when the average brightness value of each multi-image is large, the black data has smaller black data. That is, the clipping value can be adjusted upward.

As another example, the clipping unit 1020 can set the clipping value so that, when the average brightness value of each multi-image is small, the black data has smaller black data and smaller brightness. That is, the clipping value can be adjusted downward.

On the other hand, the clipping unit 1020 can set the clipping value such that the greater the difference between the maximum luminance value and the minimum luminance value in each multi-image, the larger the black data has the black data. That is, the clipping value can be adjusted upward.

Or the clipping unit 1020 can set the clipping value such that the smaller the difference between the maximum luminance value and the minimum luminance value in each multi-image is, the smaller the black data has the smaller black data. That is, the clipping value can be adjusted downward.

The pixel compensating unit 1025 can compensate the pixel for the video data and output the compensated video data based on the luminance value clipped for each multi-image.

The dimming value determining unit 1030 receives a single image 1800 including a multi-image, and can calculate a dimming value for local dimming based on the single image 1800. [

The backlight control data generation unit 1035 can generate backlight control data for controlling the backlight lamp based on the luminance value clipped for each multi-image.

According to the operation of the second controller 175 in FIG. 10, the dimming value calculation is performed based on the single image 1800, the clipping operation is performed for each of the multiple images, and finally, data for backlight control , The luminance data can be determined according to the calculated dimming value and the clipped luminance value.

That is, the backlight control data generation unit 1035 outputs the backlight control data for backlight control based on the dimming value based on the single image 1800 and the brightness value clipped on a multi-image basis.

Thus, finally, the backlight control data, that is, the luminance data, suitable for each of the multi-images is output to the display 180, in particular the backlight lamp 252. [ Accordingly, the plurality of backlight lamps 252 emit light in accordance with the corresponding backlight control data, in particular, luminance data.

As a result, local dimming is realized in consideration of multi-image. Accordingly, it is possible to solve the heterogeneity of the multi-image and improve the overall image quality.

On the other hand, after the clipping to the luminance component, the pixel compensating unit 1025 compensates for the color component, so that the image quality of the displayed image can be further improved.

On the other hand, the pixel compensating unit 1025 can increase the compensation for hue as the clipping value is higher.

11 is a diagram illustrating a single image 1800 including a multi-image output from the first controller 170 and a single-image 1900 local-dimmed by multi-image output from the second controller 175 to be.

Referring to the drawing, it can be seen that the luminance value has changed for some images. This will be described in more detail with reference to Figs. 12 to 13B.

Fig. 12 exemplifies multi-image before clipping.

In the drawing, a broadcast image 1820a, a game image 1830a, an optical disk reproduced image 1810a, and a PC image 1840a are illustrated as multi-images.

On the other hand, the average picture level (APL) for each multi-image is the highest in the PC image 1840a, and then the game image 1830a, the broadcast image 1820a, the optical disk playback image 1810a ).

In such a multi-image, when the dimming value and the APL are calculated based on the entire image as a whole, and the luminance data component output as a backlight based on the dimming value and APL of the entire image is controlled, The larger, PC video 1840a is rendered darker due to the other video. Therefore, the contrast of the original image can not be properly expressed.

Conversely, the optical disk reproduced image 1810a having the smallest average luminance is displayed brighter due to the other image. Therefore, the contrast of the original image can not be properly expressed.

To improve this point, in the present invention, clipping is performed for each multi-image based on the average luminance value for each multi-image.

For example, the clipping unit 1020 can set the clipping value so that, when the average brightness value of each multi-image is large, the black data has smaller black data. That is, the clipping value can be adjusted upward.

As another example, the clipping unit 1020 can set the clipping value so that, when the average brightness value of each multi-image is small, the black data has smaller black data and smaller brightness. That is, the clipping value can be adjusted downward.

On the other hand, the clipping unit 1020 can set the clipping value such that the greater the difference between the maximum luminance value and the minimum luminance value in each multi-image, the larger the black data has the black data. That is, the clipping value can be adjusted upward.

Or the clipping unit 1020 can set the clipping value such that the smaller the difference between the maximum luminance value and the minimum luminance value in each multi-image is, the smaller the black data has the smaller black data. That is, the clipping value can be adjusted downward.

In the figure, the largest clipping value L4 is set for the PC image 1840a having the largest average brightness, and then the largest clipped value L4 is set for the game image 1830a, the broadcast image 1820a, and the optical disk reproduced image 1810a L2, L1, and L3, respectively, are set.

According to this, the black data in the PC image 1840a having the largest average brightness is set to be the brightest, and the black data to the optical disk reproduced image 1810a having the smallest average brightness is set to be darkest.

Therefore, the contrast for each multi-image can be improved.

On the other hand, when the average luminance value of the first image in the multi-image is smaller than the first predetermined value, the second controller 175 determines that the average brightness value of the single image including the multi- In the case of a polygon, it is possible to control the brightness of the first image in the black image to be smaller than that of the black image in the other images in the multi-image. This will be described with reference to FIG.

13A illustrates setting the black data to have a smaller value for the optical disk reproduced image 1850a having the smallest average luminance.

Referring to the drawing, the second controller 175 sets the black data to have a smaller value for the optical disk reproduced image 1850a having the smallest average brightness. Thus, the optical disk reproduced image 1850b having darker luminance can be displayed by driving the backlight lamp.

As a result, a single image 1900 including the optical disk reproduced image 1850b is displayed on the display 180, thereby eliminating the heterogeneity of the multi-image and improving the overall image quality.

On the other hand, when the average luminance value of the first image in the multi-image is greater than the third predetermined value, the second controller 175 determines that the average brightness value of the single image including the multi- In the case of black, when the black image is displayed for the first image among the multi images, it is possible to control the brightness of the multi image to be larger than that of black for the other images. This will be described with reference to FIG. 13B.

13B illustrates setting the black data to have a larger value for the PC image 1840a having the largest average brightness.

Referring to the drawing, the second controller 175 sets the black data to have a larger value for the PC image 1840a having the largest average brightness. Thus, the PC image 1840b, which has brighter luminance, can be displayed by driving the backlight lamp.

As a result, a single image 1900 including the PC image 1840b is displayed on the display 180, thereby eliminating the heterogeneity of the multi-image and improving the overall image quality.

On the other hand, a single image including a multi-image may include various numbers other than four multi-images.

14A illustrates a single image 2000 including two multi-images 2010 and 2020. FIG. 14B illustrates an example of a single image 2100 including three multi-images 2110, 2120, do.

At this time, the sizes of the two multi-images 2010 and 2010 may be different, or the sizes of at least two of the three multi-images 2110, 2120 and 2130 may be different.

On the other hand, for a single image including a plurality of multi-images, the two controller 175 can control the local dimming for each of the separated multi-images as described above.

That is, the second controller 175 can output the backlight control data for controlling the backlight lamp based on at least one of the luminance value or the dimming value of the separated multi-image.

15 is another example of an internal block diagram of the second control unit 175b.

15, the second controller 175b of FIG. 15 differs from the second controller 175 of FIG. 10 in that the dimming value determining unit 1030b determines whether the dimming value determining unit 1030b , There is a difference in calculating the dimming value.

The backlight control data generation unit 1035b differs from the backlight control data generation unit 1035b in that backlight control data for controlling the light lamp is generated based on the dimming value calculated for each multi-image and the luminance value clipped for each multi-image.

Otherwise, it is the same as that of FIG. 10.

As a result, according to the second controller 175b of FIG. 15, since the dimming value is calculated for each of the multi-images, it is possible to further improve the heterogeneity of the multi-image and improve the overall image quality.

16 is another example of an internal block diagram of the second control unit 175c.

16, the second control unit 175c is different from the second control unit 175b of FIG. 15 in that the APL calculation unit 1015, the clipping unit 1020, and the pixel compensation unit 1025 are not provided There is a difference in that.

That is, the dimming value determining unit 1030c calculates a dimming value for each of the multi-images separated by the multi-image demultiplexing unit 1010. [

The backlight control data generation unit 1035c generates backlight control data for controlling the light lamp based on the dimming value calculated for each multi-image. According to this, it is possible to solve the heterogeneity of the multi-image and improve the overall image quality by the multi-image and the dimming value.

Meanwhile, the operation method of the image display apparatus of the present invention can be implemented as a code that can be read by a processor on a recording medium readable by a processor included in the image display apparatus. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the recording medium that can be read by the processor include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave such as transmission over the Internet . In addition, the processor-readable recording medium may be distributed over network-connected computer systems so that code readable by the processor in a distributed fashion can be stored and executed.

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 (19)

panel;
A plurality of backlight lamps for outputting light to the panel;
An image receiving unit for receiving multi-images from a plurality of image sources;
And a control unit for separating the multi-image received from the image receiving unit according to the multi-image display input and controlling the local dimming for each of the separated multi-images. The method according to claim 1,
Wherein,
And outputs backlight control data for controlling the backlight lamp based on at least one of the brightness value or the dimming value of the separated multi-image. The method according to claim 1,
Wherein,
Wherein when the average luminance value of the first image in the multi-image is a second predetermined value that is smaller than the first predetermined value in a state where the average luminance value of the single image including the multi-image is the first predetermined value, And controls the brightness of the first image to be smaller than that of black for the other images in the multi-image. The method according to claim 1,
Wherein,
Wherein when the average brightness value of the first image in the multi image is a fourth predetermined value that is larger than the third predetermined value in a state where the average brightness value of the single image including the multi image is the third predetermined value, Wherein the control unit controls the display unit to have a brightness greater than that of black for the other images in the multi-image when the first image is displayed in black. The method according to claim 1,
Wherein,
And a clipping unit for performing clipping on the luminance value of the multi-image based on the average luminance value for each of the multi-images, and based on the luminance value clipped for each multi-image, And controls the backlight lamp to be driven. The method according to claim 1,
Wherein,
An average luminance calculator for calculating an average luminance value for each of the plurality of separated images;
A clipping unit for performing clipping on the brightness value of the multi-image based on the average brightness value for each multi-image;
And a backlight control data generation unit for generating backlight control data for controlling the backlight lamp based on the brightness value clipped by the multi-image. The method according to claim 1,
Wherein,
And a pixel compensator compensating a pixel of the video data based on the luminance value clipped by the multi-image, and outputting the compensated video data. The method according to claim 1,
Wherein,
Receiving a single image including the multi-image, calculating a dimming value for local dimming based on the single image,
Separating the multi-image from the single image including the multi-image, computing an average luminance value for each of the separated multi-images,
And outputs backlight control data for controlling the backlight lamp based on the dimming value and the average luminance value. The method according to claim 1,
Wherein,
A dimming value determination unit for receiving a single image including the multi-image and computing a dimming value for local dimming based on the single image;
An average luminance calculator for calculating an average luminance value for each of the plurality of separated images;
A clipping unit for performing clipping on the brightness value of the multi-image based on the average brightness value for each multi-image;
And a backlight control data generator for generating backlight control data for controlling the backlight lamp based on the brightness value clipped for each of the multi-images, and the dimming value. 10. The method of claim 9,
Wherein,
And a pixel compensator compensating a pixel of the video data based on the luminance value clipped by the multi-image, and outputting the compensated video data. The method according to claim 1,
Wherein,
Calculates a dimming value for each of the separated multi-images,
Calculates an average luminance value for calculating an average luminance value for each of the separated multi-images,
Performing clipping on the brightness value of the multi-image based on the average brightness value for each multi-image,
And generates backlight control data for controlling the backlight lamp based on the luminance value clipped by each of the multi-images, and the dimming value calculated for each of the multi-images. The method according to claim 1,
Wherein,
A dimming value determiner for calculating a dimming value for each of the separated multi-images;
An average luminance calculator for calculating an average luminance value for each of the plurality of separated images;
A clipping unit for performing clipping on the brightness value of the multi-image based on the average brightness value for each multi-image;
And a backlight control data generator for generating backlight control data for controlling the backlight lamp based on the luminance value clipped by each of the multi images and the dimming value calculated for each of the multi images. Device. The method according to claim 1,
Wherein,
The method of claim 1, further comprising the steps of: separating a multi-image from a single image including the multi-image, calculating a dimming value for each of the separated multi-
And outputs backlight control data for controlling the backlight lamp based on the dimming value. The method according to claim 1,
Wherein,
A multi-image separator for separating a multi-image from a single image including the multi-image;
A dimming value determiner for calculating a dimming value for each of the separated multi-images;
And a backlight control data generating unit for generating backlight control data for controlling the backlight lamp based on the dimming value. panel;
A plurality of backlight lamps for outputting light to the panel;
An image receiving unit for receiving multi-images from a plurality of image sources;
The method comprising the steps of: dividing a plurality of images received from the image receiving unit according to a multi-image display input, computing an average luminance value for each of the separated multi-images, calculating, based on the average luminance value for each of the multi- And controlling the backlight lamp to be driven based on the luminance value clipped by the multi-image. 16. The method of claim 15,
Wherein,
Wherein when the average luminance value of the first image in the multi-image is a second predetermined value that is smaller than the first predetermined value in a state where the average luminance value of the single image including the multi-image is the first predetermined value, And controls the brightness of the first image to be smaller than that of black for the other images in the multi-image. 16. The method of claim 15,
Wherein,
Wherein when the average brightness value of the first image in the multi image is a fourth predetermined value that is larger than the third predetermined value in a state where the average brightness value of the single image including the multi image is the third predetermined value, Wherein the control unit controls the display unit to have a brightness greater than that of black for the other images in the multi-image when the first image is displayed in black. panel;
A plurality of backlight lamps for outputting light to the panel;
An image receiving unit for receiving multi-images from a plurality of image sources;
Wherein when the average luminance value of the first image in the multi-image is a second predetermined value that is smaller than the first predetermined value in a state where the average luminance value of the single image including the multi-image is the first predetermined value, And controlling the luminance of the first image to be smaller than that of black of the other images in the black display of the first image. 19. The method of claim 18,
Wherein,
Wherein when the average brightness value of the first image in the multi image is a fourth predetermined value that is larger than the third predetermined value in a state where the average brightness value of the single image including the multi image is the third predetermined value, Wherein the control unit controls the display unit to have a brightness greater than that of black for the other images among the multi-images when the first image is displayed in black.

Images