KR20110065136A - Display apparatus and control method of display - Google Patents

Abstract

The present invention relates to a display device and a display control method. According to an aspect of the present invention, there is provided a display apparatus including: a signal receiver configured to receive an image signal including a left eye image and a right eye image for a 3D image; A signal processor for separating and scaling the left eye image and the right eye image from the image signal received by the signal receiver; A display unit for alternately displaying the left eye image and the right eye image separated and scaled by the signal processor; And a controller configured to separate the left eye image and the right eye image from the image signal, and to control the signal processor to perform the scaling on each of the separated left eye image and the right eye image. It is possible to prevent a crosstalk phenomenon and a generation of garbage images, which may occur in the process of processing the 3D image signal.

3D image, overscan, just scan.

Description

Display device and display control method {DISPLAY APPARATUS AND CONTROL METHOD OF DISPLAY}

The present invention relates to a display apparatus and a display control method, and more particularly, to a display apparatus and a display control method for performing a process for displaying a 3D image signal without changing the resolution of the image signal.

When the image signal is displayed on the screen, a blanking period may be displayed to show a black border on the outside, or noise or the like may be displayed due to an abnormality of the scan line. In order to prevent such a phenomenon, the display apparatus generally performs an over scan for displaying an image by slightly expanding the resolution of the original image.

When the overscan is performed, the display device enlarges the image slightly larger than the screen size and does not display the edge portion out of the screen. As a result, the top, bottom, left, and right sides of the original image may be slightly cut off.

If the overscan is performed, pixel matching between the input image and the displayed image is not performed, thereby degrading the image quality of the image. In addition, in the case of a 3D image, a crosstalk phenomenon and a garbage image may occur in an image that has been overscanned due to characteristics of a process.

Accordingly, an object of the present invention is to perform a process for displaying a 3D image signal without changing the resolution of the image signal, thereby preventing crosstalk and generation of garbage images that may occur during processing for the 3D image. The present invention relates to a display device and a display method which can be removed.

In accordance with an aspect of the present invention, there is provided a display apparatus comprising: a signal receiving unit configured to receive an image signal including a left eye image and a right eye image for a 3D image; A signal processor for separating and scaling the left eye image and the right eye image from the image signal received by the signal receiver; A display unit for alternately displaying the left eye image and the right eye image separated and scaled by the signal processor; And a control unit which separates the left eye image and the right eye image from the image signal, and controls the signal processor to perform the scaling on each of the separated left eye image and the right eye image. Is achieved by.

In the display apparatus, the image signal is analog, and the controller may control the signal processor to separate the left eye image and the right eye image from the converted image signal after converting the image signal to digital. In the display device, the scaling may include overscanning at least one of the left eye image and the right eye image. In the display device, the video signal may be based on a top-and-bottom method. In the display device, the video signal may be based on a side-by-side method. In the display apparatus, when the signal receiving unit receives the video signal subjected to overscan, the controller receives the left eye image and the left eye image from the original video signal of the video signal obtained by downscaling the received video signal. The signal processor may be controlled to separate the right eye image.

Meanwhile, according to the present invention, there is provided a display method, comprising: receiving an image signal including a left eye image and a right eye image for a 3D image; Separating the left eye image and the right eye image from the video signal; Performing scaling on each of the separated left eye image and the right eye image; And alternately displaying the separated and scaled left eye image and the right eye image.

In the display control method, the video signal is analog, and the method may further include converting the video signal to digital, and the separating may be performed after converting the video signal to digital. In the display control method, the scaling may include overscanning at least one of the left eye image and the right eye image. In the display control method, the video signal may be based on a top-and-bottom method. In the display control method, the video signal may be based on a side-by-side method. In the display control method, when the image signal subjected to overscan is received, the left eye image and the right eye image may be separated from the original image signal of the image signal obtained by downscaling the received image signal. .

As described above, according to the present invention, it is possible to prevent the occurrence of the crosstalk phenomenon and the garbage image, which may occur in the process of processing the overscanned 3D image signal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification.

1 is a block diagram illustrating a configuration of a display apparatus 100 according to an embodiment of the present invention.

The display apparatus 100 according to an embodiment of the present invention may be a TV, a desktop computer, a laptop computer, a set top box, a monitor, a game machine, a mobile terminal, or the like. In addition, any electronic device capable of processing and displaying a 3D image may be the display apparatus 100 according to an exemplary embodiment.

The display apparatus 100 according to the exemplary embodiment of the present invention may include a signal receiver 110, a signal processor 120, a display 130, and a controller 140.

The signal receiver 110 may receive an image signal including a left eye image and a right eye image for a 3D image. In this case, the video signal may be one of a top-and-bottom method, a side-by-side method, a frame sequential method, a checkerBD method, and a line-by-line method.

The top-and-bottom method is a method in which a left eye image and a right eye image are input side by side up and down one frame. The side-by-side method is a method in which a left eye image and a right eye image are input side by side to the left and right of one frame. In the frame sequential method, the left eye image and the right eye image are alternately inputted in separate frames. The CheckerBD (Checker Board) method is a method in which predetermined units of pixels constituting the left eye image and the right eye image are alternately inputted up, down, left, and right of one frame. The line-by-line method is a method in which lines constituting the left eye image and the right eye image are input by being arranged in units of rows in one frame.

In addition, the video signal may be in analog form or digital form. The analog image signal may be input from AV, SCART, COMPONENT, PC, or the like. In addition, the digital image signal may be input from HDMI, DVI, or the like.

The signal processor 120 may perform separation and scaling of the left eye image and the right eye image from the image signal received by the signal receiver 110.

In detail, when one image frame includes a left eye image and a right eye image, the signal processor 120 may separate the left eye image and the right eye image from the input image frame. For example, in the case of a video signal based on a top-and-bottom method and a side-by-side method, a left eye image and a right eye image may be separated from one image frame.

In this case, the signal processor 120 may scale each of the separated left eye images and right eye images according to the screen. For example, when the input image is a top-and-bottom method, each of the left eye image and the right eye image may be scaled twice in the vertical direction. When the input image is a side-by-side method, each of the left eye image and the right eye image may be scaled twice in the horizontal direction.

In addition, the signal processor 120 may perform an overscan for displaying an image on a screen by enlarging the image larger than the original size.

To this end, the signal processor 120 may include a 3D IC (not shown) and a scaler (not shown). The 3D IC and the scaler may separate and scale the left eye image and the right eye image by various methods.

According to an embodiment, the scaler does not scale the image signal, and the 3D IC may perform separation and scaling of the image signal. This will be described later in the description of FIG. 2A. According to another embodiment, the 3D IC may separate the video signal, and the scaler may scale the separated video signal. This will be described later in the description of FIG. 2B.

The display 130 may alternately display the left eye image and the right eye image separated and scaled by the signal processor 120. To this end, the display unit 130 is a display implemented in the form of a liquid crystal display (LCD), an organic light emitting diode (OLED), a plasma display panel (PDP), or the like. The panel may include a panel (not shown) and a panel driver (not shown).

The controller 140 separates the left eye image and the right eye image from the image signal without changing the resolution of the image signal, and performs scaling on each of the separated left eye image and the right eye image. Can be controlled.

The video signal includes a left eye image and a right eye image for a 3D image, and may be a top-and-bottom method or a side-by-side method. The scaling may include overscanning at least one of a left eye image and a right eye image.

When the image signal is analog, the controller 140 may control the signal processor 120 to separate the left eye image and the right eye image from the converted image signal after converting the image signal to digital.

In the case of an analog image signal including a left eye image and a right eye image for a 3D image, when the overscan is performed, image distortion occurs during the 3D image processing. Therefore, in one embodiment of the present invention, the video signal is separated into a left eye image and a right eye image without changing the resolution of the video signal. The image distortion generated when the overscan is performed will be described later with reference to FIGS. 3A to 4B.

The state in which the resolution of the image signal is not changed means the original image without performing the overscan. Displaying the original image without performing overscan is called just scan. According to the just scan, the original size of the image and the displayed image size are 1: 1. In this case, the original image without distortion can be displayed, and the image quality can be improved through pixel matching.

In general, no just scan is performed on analog signals. Therefore, when the 3D image signal is in an analog form, 3D image processing is performed on the image on which the overscan is performed. As a result, image distortion occurs. According to an embodiment of the present invention, when the 3D video signal is in an analog form, the video signal is processed as a 3D image while the video signal is just scanned. Therefore, even in the case of analog signals, it is possible to prevent crosstalk and generation of garbage images.

On the other hand, when the signal receiver 110 receives the over-scanned video signal, the controller 140 separates the left eye image and the right eye image from the original video signal of the video signal obtained by downscaling the received video signal. The signal processor 120 may be controlled to perform the control.

External equipment such as broadcasting stations or PCs may transmit overscanned video signals. In this case, the display apparatus 100 receives an overscanned image signal. Therefore, the controller 140 may convert the overscanned image signal into the original image and then perform 3D image processing on the original image.

2A is a diagram illustrating a flow of an image signal processed according to an embodiment of the present invention.

In FIG. 2A, an image signal input to the signal processor 120 is output through the scaler 122 and the 3D IC 124.

The scaler 122 bypasses the image signal without scaling when an image signal including a left eye image and a right eye image for a 3D image is input. The bypassed video signal is output to the 3D IC 124.

Meanwhile, when the video signal is in the analog form, the scaler 122 may convert the analog form into the digital form.

The 3D IC 124 receives an image signal that is not overscanned, that is, a just scanned image signal. In this case, the 3D IC 124 separates the left eye image and the right eye image from the image signal, and performs scaling on each of the separated left eye image and the right eye image. In detail, the 3D IC 124 may scale the left eye image and the right eye image according to a specific resolution, or may over-scan the image noise mixed at the edges.

2B is a diagram illustrating a flow of an image signal processed by another embodiment of the present invention.

In FIG. 2B, an image signal input to the signal processor 120 is output through the 3D IC 124 and the scaler 122.

The 3D IC 124 receives a video signal including a left eye image and a right eye image for a 3D image. In this case, the video signal input to the 3D IC 124 is a video signal that is not overscanned, that is, a just scanned video signal. The 3D IC 124 separates the left eye image and the right eye image from the input image signal. The separated left eye image and right eye image are output to the scaler 122.

The scaler 122 performs scaling on each of the separated left eye image and right eye image. In detail, the scaler 122 may scale the left eye image and the right eye image according to a specific resolution, or may overscan to eliminate image noise mixed at the edges.

3A is a diagram illustrating a case of processing a just scanned side-by-side scheme video signal, and FIG. 3B is a diagram illustrating a case of processing an over-scanned side-by-side scheme video signal.

The image frame 310 shown on the left side of FIG. 3A is a side-by-side type video signal in which left eye images L and right eye images R are arranged side by side. Each of the left eye image L and the right eye image R included in the side-by-side video signal has half the resolution in the horizontal direction as compared with the predetermined image frame. Therefore, the left eye image L and the right eye image R are separated from the image signal, and are each scaled twice in the horizontal direction. In this case, the left eye image L and the right eye image R are obtained as shown on the right side of FIG. 3A. The left eye image L and the right eye image R shown on the right side of FIG. 3A are images without distortion.

As shown in the upper left of FIG. 3B, when the side-by-side type video signal is overscanned, an enlarged image 330 is obtained compared to the original size. In this case, an image 320 is displayed on the screen in which the top, bottom, left, and right sides are slightly cut off to fit the actual screen size.

When the processing for displaying the 3D image is performed based on the overscanned image, the left eye image L and the right eye image R shown in the lower right of FIG. 3B are obtained. Specifically, the overscanned image is obtained. After separating the left eye image (L) and the right eye image (R) and then scaling each of the separated left eye image (L) and right eye image (R), the left eye image (L) and the right eye image (R) shown on the right side of FIG. ), The distorted image is displayed. The circle shown in each of the left eye image L and the right eye image R shown at the lower right of FIG. 3B is compared with the circle shown in the left eye image L and the right eye image R shown at the right of FIG. 3A. Your size and center are different. This is because the size and the center of the circle included in each of the left eye image L and the right eye image R change as the image is enlarged by overscan, as shown in the upper left and the lower left of FIG. 3B.

4A is a diagram illustrating a case of processing a just-scanned top-and-bottom image signal, and FIG. 4B is a diagram illustrating a case of processing an over-scanned top-and-bottom image signal.

The image frame 410 shown on the left side of FIG. 4A is a top-and-bottom image signal in which left eye images L and right eye images R are arranged side by side. Each of the left eye image L and the right eye image R included in the top-and-bottom video signal has half the resolution in the vertical direction compared to the predetermined image frame. Therefore, the left eye image L and the right eye image R are separated from the image signal, and are each scaled twice in the vertical direction. In this case, the left eye image L and the right eye image R are obtained as shown on the right side of FIG. 4A. The left eye image L and the right eye image R shown on the right side of FIG. 4A are images without distortion.

As shown in the upper left of FIG. 4B, when the top-and-bottom image signal is overscanned, an enlarged image 430 is obtained compared to the original size. In this case, the screen displays an image 420 in which the top, bottom, left, and right sides are slightly cut off to fit the actual screen size.

When the overscanned image is divided into a left eye image L and a right eye image R, and then each of the separated left eye image L and the right eye image R is scaled, the left eye image L shown on the right side of FIG. And a distorted image is displayed as compared with the right eye image (R). The circle shown in each of the left eye image L and the right eye image R shown at the lower right of FIG. 4B is compared with the circle shown in the left eye image L and the right eye image R shown at the right of FIG. 4A. By size and center. This is because the size and center of the circle included in each of the left eye image L and the right eye image R are changed as the image is enlarged by overscan, as shown in the upper left and the lower left of FIG. 4B.

When the left eye image L and the right eye image R are not in focus, a crosstalk phenomenon may occur in which the left eye image and the right eye image overlap. That is, when the left eye image L and the right eye image R are separated from the overscanned image signal, crosstalk may occur.

FIG. 5A is a diagram showing an example of an analog waveform, FIG. 5B is a diagram showing a data valid section of an analog signal, and FIG. 5C is a diagram showing a data valid section of a digital signal.

In FIG. 5A, the entire data is input during c period.

In this case, section a is a blanking section. In the blanking period, signal information existing between one frame and the next frame is input. The signal information is technical information, not actual data. When such signal information is displayed on the screen, it may appear that white lines and black lines are shaking and crossing.

In the b section, actual data is input. In the case of analog inputs, the front porch is used as a reference for detecting actual data, that is, an active line. In this case, the active line region may vary depending on the threshold used during encoding. That is, the active line region may move due to the reference voltage tuning difference when encoding the analog signal. This phenomenon occurs differently for each device.

As a result, the active pixel in the data valid period is not accurate. That is, referring to FIG. 5B, the starting point of the data valid period has moved. As a result, data existing in the X section is lost. On the other hand, data existing in the Y section is inserted into the valid data section. The data present in the Y section is Gabbage data, not actual data.

On the other hand, in the case of digital inputs, such a problem is less likely due to signal characteristics. Referring to FIG. 5C, the starting point of the data validity period is exactly coincident, whereby the active pixel in the data validity period is exactly.

When an analog type 3D image signal is input, when the overscan is performed, the starting point of the data valid period may be different. As a result, when using an analog type 3D video signal, when a just scan is not performed or an accurate just scan is not performed, a 3D image of a top-and-bottom method and a side-by-side method is output. Distortion may occur in the course of processing.

Therefore, in the exemplary embodiment of the present invention, in the case of the analog input, the 3D image is separated and upscaled according to the screen size without performing the just scan to scale the image. Accordingly, garbage data that may occur when using the top-bottom and side-by-side methods of the 3D image method for the analog input can be removed.

6 is a view illustrating a display control process according to an embodiment of the present invention.

The display apparatus 100 receives an image signal including a left eye image and a right eye image for a 3D image (S601). The video signal may be one of a top-and-bottom method and a side-by-side method.

The display apparatus 100 separates the left eye image and the right eye image from the video signal without changing the resolution of the video signal (S602). That is, the left eye image and the right eye image are separated from the video signal while the input image signal is just scanned.

In this case, the display apparatus 100 performs scaling on each of the separated left eye image and right eye image (S603). In detail, when the input image is a top-and-bottom method, the display apparatus 100 may scale the left eye image and the right eye image twice in the vertical direction. In addition, when the input image is a side-by-side method, the display apparatus 100 may scale each of the left eye image and the right eye image twice in the horizontal direction.

The display apparatus 100 alternately displays the separated and scaled left eye image and right eye image (S604). Thus, the display process according to an embodiment of the present invention all ends.

Although some embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that modifications may be made to the embodiment without departing from the spirit or spirit of the invention. . It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

1 is a block diagram showing the configuration of a display device according to an embodiment of the present invention.

FIG. 2A is a diagram illustrating a flow of an image signal processed by an embodiment of the present invention. FIG.

FIG. 2B is a diagram illustrating a flow of an image signal processed by another embodiment of the present invention. FIG.

3A is a diagram illustrating a case of processing a just scanned side-by-side video signal.

3B is a diagram illustrating a case of processing an over-scanned side-by-side video signal.

4A is a diagram illustrating a case of processing a just scanned top-and-bottom video signal.

4B is a diagram illustrating a case of processing an over-scanned top-and-bottom video signal.

5A illustrates an example of an analog waveform.

5B is a diagram illustrating a data valid period of an analog signal.

5C is a diagram illustrating a data valid period of a digital signal.

6 illustrates a display control process according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: display device 110: the receiving unit

120: signal processing unit 130: display unit

140: control unit

Claims (12)

In the display device, A signal receiver configured to receive an image signal including a left eye image and a right eye image for a 3D image; A signal processor for separating and scaling the left eye image and the right eye image from the image signal received by the signal receiver; A display unit for alternately displaying the left eye image and the right eye image separated and scaled by the signal processor; And And a control unit which separates the left eye image and the right eye image from the image signal, and controls the signal processor to perform the scaling on each of the separated left eye image and the right eye image. The method of claim 1, The video signal is analog, And the control unit controls the signal processor to separate the left eye image and the right eye image from the converted image signal after converting the image signal into digital. The method of claim 2, The scaling may include over-scanning at least one of the left eye image and the right eye image. The method of claim 1, And the video signal is based on a top-and-bottom method. The method of claim 1, The video signal is a display device, characterized in that the side-by-side method. The method of claim 1, The controller may be configured to separate the left eye image and the right eye image from an original image signal of the video signal obtained by downscaling the received video signal when the signal receiver receives the video signal over-scanned. Display apparatus characterized in that for controlling the signal processor. In the display method, Receiving an image signal including a left eye image and a right eye image for a 3D image; Separating the left eye image and the right eye image from the video signal; Performing scaling on each of the separated left eye image and the right eye image; And And alternately displaying the separated and scaled left eye image and the right eye image. The method of claim 7, wherein The video signal is analog, Converting the video signal to digital; And the separating step is performed after converting the video signal into digital. The method of claim 8, The scaling may include over-scanning at least one of the left eye image and the right eye image. The method of claim 7, wherein And the video signal is a top-and-bottom method. The method of claim 7, wherein The video signal is a display control method, characterized in that the side-by-side method. The method of claim 7, wherein And receiving the video signal subjected to overscan, separating the left eye image and the right eye image from the original image signal of the video signal obtained by downscaling the received video signal.

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