KR20180134647A - Display device and driving method thereof - Google Patents

Abstract

The present invention relates to a display device capable of increasing immersion of a user and a driving method thereof. According to the present invention, the display device comprises: a display panel displaying an input image and having n (n is an integer equal to or greater than two) or more speakers disposed thereon; an object detection unit analyzing data of the input image to detect an object and appointing the position of the object on a screen of the display panel to generate object position information; and an audio processing unit converting an input audio signal received in synchronization with data of the input image into n audio signals, and responding to the object position information to amplify a signal within a sound range of the object from the audio signal outputted through the closest speaker to the position of the object on the display panel.

Description

DISPLAY DEVICE AND DRIVING METHOD THEREOF [0002]

The present invention relates to a display device in which a position of an object displayed on a screen coincides with an output position of a sound corresponding to the object, and a driving method thereof.

The electronic device may include a display device for reproducing the video signal and an audio output device for reproducing the audio signal. An example of the electronic device is a television (TV), a monitor, and the like.

The electronic device outputs a video signal to a display device to display an image on a screen of the display panel, and outputs an audio signal through a speaker to reproduce the sound signal. The speaker may be implemented with an external speaker system installed outside the electronic device or an internal speaker disposed inside the electronic device. The external speaker system has good sound quality and can produce various sound effects, but there is a limitation in installation space and design, and an external speaker system adds cost.

The internal speaker may be disposed behind the display panel within the electronic device. In the case of an electronic device to which such an internal speaker is applied, the audio signal reproduced by the speaker is obscured by the display panel or other structures, and the sound quality is deteriorated.

In the electronic device, the display panel and the speaker are separated. Therefore, since the object position of the video image displayed on the screen and the output position of the audio signal are physically separated, there is no change in stereoscopic effect of the audio signal heard by the user.

The present invention provides a display device and a driving method thereof that can improve a sense of three-dimensional effect of an audio signal to improve a feeling of immersion of a user and enhance a sense of three-dimensional sound.

A display device of the present invention includes: a display panel in which an input image is displayed and n (n is an integer of 3 or more) speakers are dispersedly disposed at various positions; an object is detected by analyzing data of the input image, An object detection unit for generating object position information indicating a position of the object; and an input unit for converting the input audio signal received in synchronization with the data of the input image into the n audio signals, And an audio signal processor for amplifying a band-width signal of the object in an audio signal to be output through a speaker closest to the position of the object.

The method comprising the steps of: detecting an object by analyzing data of an input image; converting the input audio signal received in synchronization with the data of the input image into n audio signals, And amplifying the band-width signal of the object from the audio signal to be output through the speaker closest to the position of the speaker.

Since the display position of the object can be matched with the sound output position of the object band of the object by amplifying the object's sound band signal from the audio signal to be outputted through the speaker nearest to the position of the object displayed on the screen of the display panel, It is possible to improve the stereoscopic effect of the signal.

In addition, according to the present invention, the display position of the object and the output position of the sound are matched with each other in the objects of the image, thereby enhancing the user's immersion feeling for the image and sound.

In addition, the present invention can increase the sound of the object band by extracting the object-specific band-pass signal and adjusting the gain between the multi-channel audio signals through the speaker closest to the object position.

1 is a block diagram showing a display device according to an embodiment of the present invention.
2 is a flowchart illustrating a method of driving a display device according to an exemplary embodiment of the present invention.
3 is a diagram showing an example in which an object position displayed on a display panel is matched with an acoustic output position of the object.
4 is a detailed block diagram of the object detection unit.
5 is a detailed block diagram of an audio signal processing unit.
FIG. 6 and FIG. 7 are diagrams illustrating the multi-channel conversion unit in detail.
8A to 8C are diagrams showing details of the operation of the multi-channel adjustment unit shown in FIG.
9 is a view showing a speaker disposed on the display panel.
FIG. 10 is a detailed view showing the structure of the display panel integrated type speaker shown in FIG.
11A to 11C are views showing an example in which an object position and an acoustic output position using the display panel integrated type speaker coincide with each other.
FIGS. 12A and 12B are diagrams illustrating examples of outputting a characteristic band-specific signal through a speaker near a display position of an object in a display panel on which two speakers are arranged.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. It should be noted that the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms. The following embodiments are provided so that the disclosure of the present invention is complete and that those skilled in the art will fully understand the scope of the present invention. The invention is defined by the claims.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Where the terms "comprises", "having", "done", and the like are used in this specification, other portions may be added unless "only" is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the description of the embodiments, the first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another.

Like reference numerals refer to like elements throughout the specification.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other partially or wholly and technically various interlocking and driving are possible and that the embodiments may be practiced independently of each other, It is possible.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1, the display apparatus of the present invention includes a display panel 100 on which a pixel array is formed, a display panel driving circuit for writing data of the input image on the display panel 100, A detection unit 200, an audio signal processing unit 300, and the like.

The display panel 100 may be implemented as a display panel of a display device.

The display device of the present invention can be implemented based on a display device such as a liquid crystal display (LCD), a field emission display (FED), and an electroluminescence display device . The electroluminescence display device can be distinguished as an inorganic light emitting display device and an organic light emitting display device depending on the material of the light emitting layer. The inorganic light emitting display device may be, but not limited to, a quantum dot display device.

The screen of the display panel 100 includes a pixel array in which data of an input image is displayed. In the pixel array, the data lines DL and gate lines (or scan lines, GL) are crossed, and the pixels are arranged in a matrix form. Each of the pixels may be divided into a red subpixel, a green subpixel, and a blue subpixel for color implementation. Each of the pixels may further include a white subpixel.

At least n speakers (SP1 to SP3) are arranged on the display panel (100). The speakers SP1 to SP3 are distributed on the display panel 100 in consideration of the position of the object displayed on the screen. The speakers SP1 to SP3 may be coupled to the back surface of the display panel 100 or integrated with the display panel 100, as shown in FIG.

The display panel drive circuit writes the data of the input image to the pixels. The display panel drive circuit includes a data driver 102, a gate driver 104, and a timing controller 106.

The data driver 102 receives digital video data (hereinafter referred to as "video signal") of the input video received from the timing controller 106. [ The data driver 102 converts a video signal of an input image into a data voltage using a digital to analog converter (DAC), and outputs the data voltage to the data lines DL. The gate driver 104 sequentially supplies gate pulses to the gate lines GL under the control of the timing controller 106. The gate pulse is synchronized to the data voltage to be charged to the pixels. The gate driver 104 may be formed directly on the lower substrate of the display panel 100 together with the pixel array. In this case, it can be called a gate in panel (GIP).

The timing controller 106 transmits the video data of the input image received from the host system 110 to the data driver 102. The timing controller 106 receives timing signals from the host system 110 in synchronization with the input image data. The timing signals may include a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a data enable signal DE, and a dot clock DCLK. The timing controller 106 controls the operation timings of the data driver 102 and the gate driver 104 based on the timing signals Vsync, Hsync, DE, and DCLK received together with the pixel data of the input image.

The host system 110 may be any one of a TV system, a set top box, a navigation system, a DVD player, a Blu-ray player, a personal computer (PC), a home theater system, It is not. The host system 110 transmits digital audio data (hereinafter referred to as "audio signal ") synchronized with the video data of the input video and a timing signal to the timing controller 106. The host system 110 may output a video signal combined with an audio signal. This video signal can be matched to an audio signal separated by object.

The object detection unit 200 detects the object by analyzing data of the input image and generates object position information indicating the position of the object on the screen of the display panel 100. The object detection unit 200 detects each of the objects in the input image received from the host system 110 using a preset object detection algorithm and outputs object position information specifying the position of each object to the audio signal processing unit 300 Output. Objects can be detected in various ways. For example, a person can be detected using a face detection algorithm and a motion estimation algorithm. Non-human objects may also be detected using known object recognition algorithms, but are not limited thereto.

The host system 110 may transmit the data of the input image including the object identification code for distinguishing each of the objects in the image to the object detection unit 200. [ In this case, the object detecting unit 200 can read the object identification code from the received input image data and distinguish the video signal and the audio signal for each object. The object position information output from the object detection unit 200 is transmitted to the audio signal processing unit 300.

The audio signal processing unit 300 converts an audio signal received from the host system 110 into a multi-channel audio signal in synchronization with the input video data using a multi-channel conversion algorithm. As an example of a multi-channel conversion algorithm, there is an algorithm for converting a two-channel sound source signal into 5.1 channels. The present invention can generate a multi-channel audio signal having the number of channels as many as the number of speakers disposed on the display panel 100. The number of speakers disposed on the display panel 100 may be two or more, but is not limited thereto.

The audio signal processing unit 300 adjusts the gain of a specific band-specific signal in the multi-channel audio signals based on the object position information received from the object detection unit 200 to adjust the gains of the speakers SP1 to SP3 closest to the object display position, The gain of the object-specific band-pass signal is increased in the audio signal output to the speaker. The audio signal processing unit 300 converts the multi-channel audio signals into an analog signal through a digital to analog converter (DAC) and outputs the analog signal to the speakers SP1 to SP3.

The audio signal processing unit 300 outputs the object displayed on the screen and the sound specific to the object at the same position and the sound output position of the object sound band is moved along the object when the object is moved. Since the sound specific to the object can be generated from the object on the screen, the immersive feeling and stereoscopic effect of the image and sound can be improved. Therefore, according to the embodiment of the present invention, it is possible to detect one or more objects based on a shape feature in an image displayed on the screen. An object can mean an independent entity having features that are unique in the transliteration and shape features. For example, one video frame represented by one frame of data on one screen may include various objects having a shape characteristic and a different band. Then, the sound field of the audio signal corresponding to the object detected in the input image is extracted, and the display position of the object is matched with the sound output position of the sound field of the object. Therefore, since the output position of the audio signal in the specific band of the object can be changed along with the movement of the object, the sense of three-dimensional effect of the audio signal experienced by the user can be improved.

Hereinafter, the object displayed on the screen will be described as a person by way of example. It should be noted that a person is only an example of an object, but an object is not specified in any one.

2 is a flowchart illustrating a method of driving a display device according to an embodiment of the present invention. 3 is a diagram illustrating an example in which an object position displayed on the display panel 100 coincides with a sound output position of a sound band of the object.

Referring to FIGS. 2 and 3, the object detection unit 200 detects an object OBJ in the input image data to be reproduced on the display panel 100 using a preset object detection algorithm (S01). The object detection unit 200 may perform a reliablity check to determine the accuracy of object detection (S03). The reliability check can determine the validity of the object detection result and invalidate the object detection result when it is determined that the object detection result is uncertain.

The audio signal processing unit 300 converts the input audio signal into a multi-channel audio signal (S02). In the example of FIG. 3, the multi-channel audio signal is an audio signal of the first channel to be output through the first speaker SP1 located on the left side of the display panel 1, The audio signal of the second channel to be outputted through the second speaker SP2 located at the center and the audio signal of the third channel to be outputted through the third speaker SP3 located to the right on the screen of the display panel 1 Channel audio signal.

The audio signal processor 300 adjusts the gain multiplied by the band-width signal of the object when the reliability of the object detection result is high as a result of the reliability check of the object detector 200, thereby outputting the audio signal through the speaker at the sound output position closest to the object position And amplifies the object-specific band-pass signal from the audio signal to be processed (S04). As a result, the display position of the object on the screen of the display panel 1 coincides with the output position of the band-limited audio signal of the object. If the reliability of the object detection result is low as a result of the reliability check of the object detection unit 200, the audio signal processing unit 300 ignores the object position information received from the object detection unit 200, The gain multiplied by the signal may not be changed.

4 is a block diagram showing the object detecting unit 200 in detail.

Referring to FIG. 4, the object detecting unit 200 includes a motion determining unit 222, an outline detecting unit 224, an object position determining unit 226, and a reliability checking unit 228.

The motion determiner 222 estimates the motion of the object by executing a motion estimation algorithm on the received input image data. As an example of the motion prediction algorithm, a block matching method may be applied, but is not limited thereto. The block matching method divides the previous frame data and the current frame data into blocks of a preset size and generates a motion of a block having the highest degree of similarity within a search range (Search Range, SR) of a predetermined size between the previous frame data and the current frame data And calculates a vector (Motion Vector) to estimate a block indicating the moving object. The motion determiner 222 outputs motion information (MI) indicating the size, motion direction, and speed of the object to the object position determiner 226 based on the motion vector.

The contour detection unit 224 can extract the shape of the object from the image processing and estimate the object based on the extracted shape characteristic. For example, the contour detection unit 224 may extract a face characteristic of a person from input image data using a known face detection algorithm. The outline detection unit 224 outputs outline information (FF) defining the shape characteristic of the object to the object position determination unit 226. [

The object position determination unit 226 detects an object in every frame period of the input image based on the motion information MI and the outline information FF and generates object position information HLI indicating the object position, And transmits the object position information HLI to the audio signal processing unit 300. When there are a plurality of objects on the screen, the object position determination unit 226 generates object position information (HLI) indicating the position of the object in which the largest sound output is generated according to a predetermined determination criterion. For example, when a large number of people exist on the screen, the shape feature position of the lips is determined as the position of the object having the large motion information MI on the screen, and the object position information HLI indicating the lip position is generated .

The reliability checking unit 228 determines the validity of the object detection result of the object position determination unit 226. The reliability checker 228 calculates a reliability judgment level CL indicating the validity of the object location information HLI based on the information generated in the shape feature detection process and the motion prediction process of the object. When detecting a person on the screen, the reliability checker 228 calculates the reliability judgment level CL based on the information generated in the detection process and the motion prediction process.

In the case where the face recognition algorithm uses a simple template matching method, a reestablishment level (reestableness) is determined based on matching costs between the features of the predefined facial features and the features of the objects detected in the input image level can be determined. The matching cost can mean the difference value between the input image input in real time and the predefined face feature. The reliability checking unit 228 determines the reliability of the object detection result to be higher as the matching cost is lower and outputs the reliability judgment level CL in inverse proportion to the matching cost.

In the case of a face recognition algorithm for classifying a feature point of an input image and extracting a face, a probability value applied when classifying the feature points of the face in the input image may be set to the reliability determination level CL. For example, the reliability checker 228 determines a higher reliability of the object detection result as the face feature classification probability value is higher, and outputs a reliability determination level CL proportional to the classification probability value.

In the motion estimation method, the block matching method predicts the movement of an object between a current frame and a previous frame by searching a block (or a pixel) having the highest degree of similarity with the block (or pixel) of the current frame data in the previous frame data. In this motion prediction method, the matching cost calculated when searching the current frame information in the previous frame can be used as the reliability judgment level CL. The reliability check unit 228 can determine the reliability of the object detection result to be higher and output the reliability determination level CL in inverse proportion to the matching cost as the matching cost obtained in the motion prediction process is lower.

The reliability checker 228 can determine the reliability determination level CL based on any one of the information generated in the shape feature detection process and the motion prediction process. For example, the reliability checker 228 can determine the reliability determination level (CL) by comprehensively determining the information generated in the shape feature detection process and the motion prediction process as in the following equation.

Here, CLmotion is a reliability judgment level calculated based on the motion prediction process. The CLface is a reliability judgment level calculated based on the shape feature detection process (face recognition process) of the object. C is a constant value selected from 0 to 1 (0 ≤ c ≤ 1).

5 is a block diagram showing the audio signal processor 300 in detail.

5, the audio signal processing unit 300 includes a multi-channel converter 310, a sound position determiner 320, and a multi-channel adjuster 330. The multi-

The multi-channel converting unit 310 converts the input audio signals CH_L and CH_R into n (n is a positive integer equal to or greater than 2) channel audio signals CH1 to CHn using a multi-channel conversion algorithm. The multi-channel converter 310 extracts a band-limited frequency of a predetermined object, and outputs the band-limited frequency band to one of the n-channel audio signals CH1 to CHn. For example, the multi-channel converter 310 may select the n-th / 2-channel audio signal to be outputted through the speaker located at the center of the screen on the display panel 100.

The acoustic position determination unit 320 receives the object position information HLI and the reliability determination level CL from the object detection unit 200 and compares the reliability determination level CL with a preset reference value. The acoustic position determination unit 320 indicates an acoustic output position closest to the position of the object indicated by the object position information HLI received from the object position determination unit 226 when the reliability determination level CL is higher than the reference value And outputs acoustic position information LS.

The multi-channel adjustment unit 330 amplifies the band-width signal of the object from the audio signal of the channel indicated by the sound position information LS. The multi-channel adjusting unit 330 passes the output signals CH1 to CHn of the multi-channel converting unit 310 when the position of the object to which sound is output can not be specified. When the position of the object to which the sound is output is detected, the multi-channel adjusting unit 330 relatively increases the gain of the object's sound band signal in the audio signal to be output through the speaker closest to the object position, And adjusts the volume of the object-specific range signal at the object position.

The multi-channel conversion unit 310 can determine the reliability of the position of the object to which the sound is output and the position of the object according to the acoustic position information LS. Since the sound position information LS can be generated based on the position information HLI of the object and the trust line judgment level CL, the multi-channel audio signals CH1 'to CHn' of the multi- The gain multiplied by the characteristic band-width signal of the object can be adjusted according to the object position on the screen and the reliability judgment level (CL). When the reliability judgment level CL is lower than the reference value, the multi-channel conversion unit 310 can not specify the position of the object to which the sound is output. Therefore, the output signals CH1 to CHn of the multi- . When the reliability determination level CL is higher than the reference value, the multi-channel converter 310 increases the gain of the object-specific band-pass audio signal in the audio signal output through the speaker closest to the position of the object to which the sound is output Can be adjusted. 8A to 8C, when the position of the object moves to the left or right on the screen of the display panel 100, The gain of the audio signal becomes large, and the position of the output of the sound band signal peculiar to the object can be shifted according to the movement of the object.

Accordingly, n (n is an integer of 2 or more) speakers on which audio signals are independently applied are arranged on the display panel, and n multi-channel audio signals output through n speakers are generated using a multi-channel conversion algorithm . Accordingly, the sound of the object-specific band can be increased in the audio signal to be output through the speaker closest to the object position by extracting the band-specific signal of the object and adjusting the gain between the multi-channel audio signals.

6 and 7 are views showing the multi-channel conversion unit 310 in detail.

The multi-channel conversion unit 310 may receive audio signals of a stereo or mono sound source. The stereo sound source includes the audio signal CH_L of the left channel and the audio signal CH_R of the right channel. The mono sound source is a single channel audio signal CM_M. Hereinafter, an example in which the multi-channel converting unit 310 outputs the audio signals of the first to third channels will be described.

6, the multi-channel converting unit 310 includes an adder 312, a volume adjusting unit 314, and a range selecting unit 316. [

The multi-channel conversion unit 310 adds the first audio signal CHL and the third audio signal CHR to the adder 312 when the audio signals CH_L and CH_R of the stereo sound source are received. The audio signal added by the adder 312 may be excessively loud. The volume adjuster 314 reduces the gain of the audio signal output from the adder 312 by a predetermined gain, for example, -3 dB, and outputs the gain to the range selector 316. The translucency selector 316 extracts a frequency corresponding to an object-specific frequency band, for example, a human voice band (about 100 Hz to 4 kHz) from the audio signal received from the adder 312, and outputs a predetermined gain Multiply. The gain can be set to a value greater than zero and less than or equal to one. It is not limited to the frequency of the human voice band.

The first audio signal CHL is converted to an analog signal through the DAC and then output through the first speaker SP1 disposed on the left side of the screen. The second audio signal CHC is converted to an analog signal through the DAC and then output through the second speaker SP2 disposed at the center of the screen. The third audio signal CHR is converted into an analog signal through the DAC and then output through the third speaker SP3 disposed on the right side of the screen. The second audio signal CHC includes a signal of a frequency band of the object and each of the first and third audio signals CHL and CHR includes the frequency band of the object and the frequency of the sound source other than the band of the object.

The translucency selector 316 may be implemented as a band pass filter (BPF) that passes the characteristic band of the object. It can have a frequency of 100Hz ~ 4kHz which corresponds to the human voice band. Therefore, the pass band (fl to fh) of the band pass filter for detecting the human band in the translucency selector 316 is 100 Hz to 4 kHz. In the pass band (fl to fh), fl is the lowest frequency in the passband and fh is the highest frequency in the passband. The range selector 316 may include a plurality of bandpass filters having different band bands to extract the band of the various objects.

Referring to FIG. 7, the multi-channel converter 310 includes a transliterator 318.

The multi-channel conversion unit 310 separates the audio signal CH_M of the mono sound source into the first through third audio signals CHL, CHC, and CHR. The translucency selector 318 extracts a frequency range of the human voice band (for example, about 100 Hz to 4 kHz) of the object detected by the object detecting unit 200 and multiplies the frequency band signal by a predetermined gain And generates a second audio signal CHC.

The translucency selector 318 may be implemented as a band-pass filter (BPF) that passes the characteristic band of the object. The domain selector 318 may include a plurality of bandpass filters having different passbands in order to extract the band of the various objects.

8A to 8C are diagrams showing details of the operation of the multi-channel adjustment unit 330 shown in FIG.

8A, when the object OBJ is located on the left side of the screen, the multi-channel adjustment unit 330 reduces the gain G multiplied by the band-width signal A of the object, (1-G)) to the first audio signal (CHL). Accordingly, the first audio signal CHL ', to which the band-width signal of the object is added, is amplified and outputted through the first speaker SP1 nearest to the object OBJ on the screen. The gain can be set to a value greater than zero and less than or equal to one. The second audio signal CHC 'including the band-width signal of the object becomes smaller than the band-width signal of the object included in the first audio signal CHL'.

8C, when the object OBJ is located on the right side, the multi-channel adjustment unit 330 reduces the gain G multiplied by the band-width signal A of the object, And adds the band-limited signal A * (1-G) to the third audio signal CHR. Accordingly, the third audio signal CHR ', to which the band-width signal of the object is added, is amplified and outputted through the third speaker SP3 nearest to the object OBJ on the screen. The gain can be set to a value greater than zero and less than or equal to one. The second audio signal CHC 'including the band-width signal of the object becomes smaller than the band-width signal of the object included in the third audio signal CHR'.

8B, when the object OBJ is located at the center of the screen or the object position can not be specified because there is no effective sound position information LS, the audio signals outputted from the multi-channel converter 310 CHL, CHC, and CHR are passed through the multi-channel adjustment unit 330 and passed to the speakers SP1, SP2, and SP3 without gain adjustment.

As can be seen from Figs. 8A to 8C, the band-limited signal of the object OBJ is output the largest at a position closest to the position of the object OBJ displayed on the screen. The user can feel that the object displayed on the screen coincides with the sound output position of the sound band of the object, so that the three-dimensional feeling of the sound can be felt.

9 is a view showing a speaker disposed on the display panel.

9A shows a structure in which a speaker 91 having a general structure is disposed on the back surface of the display panel 100. In Fig. The light of the pixels is emitted through the front surface of the display panel 100 to display the input image. The diaphragm of the speakers 91 vibrates according to the audio signals CHL, CHC and CHR to output sound. These speakers 91 may be arranged on the back surface of the display panel 100 by being selected as speakers having a structure including an exciter for generating magnetic force by using magnets and coils and a diaphragm connected to the exciter . For example, the exciter may include a magnet on the plate, a center pole on the plate, a bobbin disposed around the center pole, and a coil wound around the bobbin. Further, a structure in which the magnet is disposed outside the coil or a structure in which the magnet is disposed inside the coil can be applied.

The name of the component alone does not define the function or structure. In the case of the exciter described above, it can be expressed as an exciter, an actuator, or a transducer.

9B shows a structure in which the display panel 100 is integrated with the diaphragm of the speakers. And the units 92 on the display panel 100 are connected at the positions of the speakers SP1, SP2, and SP3, respectively. The display panel 100 serves as a diaphragm of the speaker and can generate sound. Since the display panel 100 can vibrate due to the vibration caused by the magnetic field generated by the vibrators 92, the display panel integrated speaker can display the input image and output the sound of the input image can do. The display panel integrated type speaker is described in detail in Korean Patent Registration No. 10-1704517 (2017.02.02), which is filed by the present applicant and patented.

FIG. 10 is a detailed view showing the structure of the display panel integrated type speaker shown in FIG. 11A to 11C are views showing an example in which an object position and an acoustic output position using the display panel integrated type speaker coincide with each other.

10 to 11C, the display panel integrated type speaker includes a support member 104 disposed on the back surface of the display panel 100, vibrators 92 fixed to the support member 104, And an auxiliary supporting member 105 connecting the supporting member 104 and the supporting member 104 to each other.

The support member 104 may be made of metal or plastic. The name of the support member 104 may be represented by another name such as a cover bottom or a back cover. The auxiliary support member 105 adheres the support member 104 to the display panel 100 with the air gap 106 interposed therebetween. Thus, the support member 104 is fixed to the display panel 100 via the auxiliary support member 105. [

A plurality of vibrating members 92 fixed to the support member 104 are brought into contact with the rear surface of the display panel 100. [ Vibrates due to the magnetic force generated from the exciter 92, and sound can be output directly from the display panel 100. [

The present specification can be described as follows.

A display device according to an embodiment of the present invention includes a display panel on which an input image is displayed and n (n is an integer of 2 or more) speakers are arranged, an object is detected by analyzing data of the input image, An object detection unit for generating object position information by indicating an object position on the display panel, and an input audio signal received in synchronization with the input image data is converted into n audio signals. In response to the object position information, And an audio signal processing unit for amplifying the band-width signal of the object from the audio signal to be output through the nearest speaker.

In the above-described embodiments, the explanation has been made on the case where three speakers (SP1, SP2, SP3) are arranged on the display panel 100, but the present invention is not limited thereto. For example, as shown in FIGS. 12A and 12B, the present invention can be realized by arranging two speakers spaced apart from each other by a predetermined distance on the display panel 100, It is possible to output a frequency band signal. Therefore, it should be noted that the present invention can be applied to a display device in which at least two speakers are arranged on the display panel 100. [

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

100: display panel 102: data driver
104: Gate driver 106: Timing controller
110: host system 200: object detection unit
222: motion determination unit 224:
226: Object position determination unit 228: Reliability check unit
300: audio signal processor 310: multi-channel converter
312: adder 314: volume adjuster
316, 318: transliteration selection unit 320: acoustic position determination unit
330: Multi-channel adjustment section

Claims (7)

A display panel on which an input image is displayed and n (n is an integer of 2 or more) or more speakers are arranged;
An object detector for detecting an object by analyzing data of the input image and generating object position information by indicating the object position on a screen of the display panel; And
And converting the input audio signal received in synchronism with the data of the input video into the n audio signals and outputting, in response to the object position information, an audio signal to be output through a speaker nearest to the position of the object on the display panel, And an audio signal processing unit for amplifying a band-width signal of the object. The method according to claim 1,
Wherein the output position of the audio signal corresponding to the band of the object is moved along the object when the object is moved on the screen of the display panel. The method according to claim 1,
Wherein the object detection unit comprises:
A motion determiner for predicting movement of the object in the data of the input image;
An outline detection unit for detecting a shape feature of the object from data of the input image;
An object position determination unit for generating the object position information based on the motion information received from the motion determination unit and the outline information received from the contour detection unit; And
And a reliability check unit for indicating the validity of detection of the object based on the information in the motion determination unit and the shape feature unit and outputting a reliability determination level. The method of claim 3,
Wherein the audio signal processor comprises:
A multi-channel converter for converting an input audio signal into the n audio signals, extracting a band-width signal of the object, and outputting any one of the n audio signals;
For receiving the object position information and the reliability determination level from the object detection unit and for outputting sound position information indicating an acoustic output position closest to the position of the object indicated by the object position information when the reliability determination level is higher than a preset reference value An acoustic position determination unit for outputting the acoustic signal; And
And a multi-channel adjustment unit for amplifying a band-width signal of the object in an audio signal indicated by the sound position information. 5. The method of claim 4,
Wherein the multi-
Wherein the loudspeaker signal of the object is output as an audio signal through a speaker disposed at a center position of a screen of the display panel among speakers disposed on the display panel. 6. The method of claim 5,
Wherein the multi-
A first speaker for reducing the gain multiplied by the gain of the object when the object is located on the left side of the screen and a first audio signal for reducing the gain of the object by a gain reduction, Add to the signal,
Reducing the gain when the object is located on the right side of the screen and adding the left band signal of the object reduced by the gain reduction to a third audio signal to be output through the right speaker disposed on the right side of the screen,
And passes the n audio signals without gain adjustment when the object is located at the center or can not specify the position of the object on the screen. A method of driving a display device including a display panel in which an input image is displayed and n (n is an integer of 2 or more) speakers are arranged,
Analyzing data of the input image to detect an object; And
And converting the input audio signal received in synchronization with the data of the input image into the n audio signals and amplifying a band-width signal of the object from an audio signal to be outputted through a speaker closest to the position of the object displayed on the display panel The method comprising the steps of:

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