JP2012205214A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device capable of eliminating the unnaturalness of display at the display ends of a pseudo-3D-converted image.SOLUTION: An image display device of the present invention includes: a three-dimensional conversion part 5 for shifting a two-dimensional input image in a horizontal direction and generating a right-eye image and a left-eye image for a three-dimensional image; and an image quality control part 6 for performing first image quality control to gradually reduce at least contrast or brightness from pixels close to the right and left ends to pixels at the right and left ends separately in the right-eye image and the left-eye image.

Description

  The present invention relates to a video display device having a pseudo 3D function for easily converting 2D video into 3D video.

  In recent years, 3D-compatible DVD software and playback devices have been gradually put on the market, and 3D-compatible display devices are also increasing. Some display devices have a function of converting 2D video into 3D for display. One of the techniques is to shift the entire 2D video to the left and right directions for the right eye and the left eye, respectively, and to convert them into 3D video simply by displaying them alternately (see Patent Document 1).

  However, if there is an object whose display is cut off at both ends of the 2D video, the object that protrudes when 3D conversion is not displayed in the middle, which makes the viewer feel unnatural. In addition, since the portion where the display disappears in the middle of popping out is information that should be before the actual display, there is a greater sense of discomfort than in the retracting direction. For this reason, in the above-described liquid crystal TV having a pseudo 3D function, it is common to perform 3D conversion of 2D video on the retract side, and Patent Document 1 also describes the 3D conversion on the retract side.

  Even if the display is not cut off at both ends of the 2D video, if the video is lost in the process of 3D conversion and shifting the 2D video to the left or right, only the right-eye or left-eye video is displayed at both ends of the screen. There is a problem that the video is suddenly displayed in 2D at the missing portion without being displayed.

Japanese Patent Laid-Open No. 64-21436 Japanese Patent No. 3091644 Japanese Patent No. 3091659

  Therefore, a technique in which a video is divided into a plurality of parts in the vertical direction, the horizontal direction is enlarged / reduced for each divided area, and the enlargement ratio is changed stepwise toward the both ends of the screen so that the parallax, that is, the pop-out amount becomes zero. Is disclosed in Patent Document 2. This eliminates the inconvenience that the video does not suddenly pop out at both ends of the video, but information on peripheral pixels is necessary to change the enlargement ratio, and the circuit scale becomes large due to the addition of this function.

  Patent Document 3 proposes a method using a screen that is longer than the aspect ratio of the displayed video. For example, if an image with an aspect ratio of 4: 3 to be displayed is displayed on a screen with an aspect ratio of 16: 9, all the original images of 4: 3 are displayed even if 3D conversion is performed and are not cut off at both ends. Therefore, the inconvenience that the video suddenly stops popping out at both ends of the video is solved. However, this method is effective only when the aspect ratio of the input video is 4: 3. However, in recent years, 4: 3 video sources have been decreasing, and 16: 9 video occupies the majority, so there are few opportunities to obtain this technology. Further, when there is an object whose display is interrupted at both ends of the 2D video, the unnaturalness that the object popping out in the 3D converted video is not suddenly displayed on the way is not eliminated.

  In view of the above-described problems, an object of the present invention is to provide a video display device that eliminates unnaturalness of display at the display end of a video image that has been subjected to pseudo 3D conversion.

  The first video display device of the present invention includes a three-dimensional conversion unit that shifts a two-dimensional input image in the horizontal direction to create a right-eye image and a left-eye image for a three-dimensional image, the right-eye image, Each of the left-eye images includes an image quality control unit that performs first image quality control that gradually reduces at least one of contrast and brightness from the pixels near the left and right edges to the pixels on the left and right edges.

  The second video display apparatus according to the present invention performs first image quality control that gradually reduces at least one of contrast and brightness from the pixels near the left and right edges of the two-dimensional input image to the pixels at the left and right edges. An image quality control unit; and a 3D conversion unit that shifts the input image subjected to the image quality control in a horizontal direction to create a right-eye image and a left-eye image for a 3D image.

  The first video display device of the present invention includes a three-dimensional conversion unit that shifts a two-dimensional input image in the horizontal direction to create a right-eye image and a left-eye image for a three-dimensional image, the right-eye image, Each of the left-eye images includes an image quality control unit that performs first image quality control that gradually reduces at least one of contrast and brightness from the pixels near the left and right edges to the pixels on the left and right edges. The uncomfortable feeling at both ends of the display when the 3D function is set to the pop-out side is reduced.

  The second video display apparatus according to the present invention performs first image quality control that gradually reduces at least one of contrast and brightness from the pixels near the left and right edges of the two-dimensional input image to the pixels at the left and right edges. Since it includes an image quality control unit and a 3D conversion unit that shifts the input image subjected to the image quality control in the horizontal direction to create a right eye image and a left eye image for a 3D image, a pseudo 3D function is provided. Reduces discomfort at both ends of the display when set to the pop-up side.

It is a block diagram which shows the structure of the video display apparatus concerning Embodiment 1 of this invention. It is a figure which shows operation | movement of the video display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the video image by the video display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the outline | summary of the pseudo | simulation 3D conversion based on the premise technique of this invention. It is a figure which shows the video image by pseudo | simulation 3D conversion based on the premise technique of this invention.

(Prerequisite technology)
A pseudo 3D function for pseudo-converting 2D video into 3D video, which is a prerequisite technology of the present invention, will be described.

  FIG. 4 is a pixel layout diagram of each video when 2D video is 3D converted in the direction in which the video is projected, and FIG. 5 is an image diagram of various video. A liquid crystal television that displays video has a horizontal pixel number of 1920 dots and a vertical pixel number of 1080 lines. In the 2D video V2, the first to 1920th pixels are arranged in order from the left end to the right end of the screen. In the vertical direction, the 1920 dot lines are displayed side by side with 1080 lines.

  FIG. 5A shows a display image of 2D video. In FIG. 5 (a), as an example, a rhombus figure that spreads across the screen frame is displayed. When performing pseudo 3D conversion, a right-eye video and a left-eye video are created. Here, since 3D conversion is considered in the direction in which the video is projected, the 2D video is shifted by 5 pixels in the left direction, and the right-eye video is shifted by 5 pixels in the right direction to be the left-eye video. The parallax Dn of both eyes is 10 dots, but the parallax amount can be arbitrarily adjusted.

  Here, in the right-eye video Vrn, the sixth pixel is displayed at the left end of the screen, and the first to fifth pixels are missing. Therefore, the first to fifth pixel areas m of the 2D video are subjected to 3D conversion. Only one-eye video is displayed. That is, the first to fifth pixel regions k in the left-eye video Vln do not contribute to 3D. The right-eye video and the left-eye video at this time are shown as in the upper diagram of FIG.

  In FIG. 5B, the 2D video is also shown with a dotted line, but the video position seen when the viewer views the video in 3D is virtually illustrated for the sake of easy understanding, and is shown on the actual screen. Is not displayed.

  In FIG. 4, the binocular parallax Dn corresponds to the 11th pixel of the 2D video V2, for example, because the distance between the pixels corresponding to the 11th pixel of the right-eye video Vrn and the left-eye video Vln is 10 dots. The Dn of the pixel is 10 dots.

  Further, as shown in the lower diagram of FIG. 5B, the 3D video is a video that protrudes by a range of h in which videos for both eyes are aligned. The pop-out amount is an amount corresponding to a parallax of 10 dots.

  As shown in the upper diagram of FIG. 5B, the left end of the right eye image and the right end of the left eye image protrude from the screen frame. As a result, the range indicated by Z in the figure has only one-eye video information. As can be seen from the lower diagram in FIG. 5B, this range is an image that should be projected in front of the screen, but it does not actually pop out, and the image that the viewer sees is that shown in FIG. 5C. Become. In FIG. 5C, the range of the width h including the center of the rhombus indicated by a solid line appears to protrude, and both end portions indicated by a dotted line look like 2D video, so that the viewer feels unnaturalness at both ends of the screen.

  Therefore, in the video display apparatus of the present invention, the unnaturalness is eliminated by performing image quality control at both ends of the screen.

(Embodiment 1)
<Configuration>
FIG. 1 is a block diagram of the video display apparatus according to the first embodiment. The video display device 1 includes a control unit 2, a timing generation unit 3, a video memory 4, a 3D conversion unit 5, an image quality control unit 6, and a liquid crystal module 7.

  The video memory 4 receives and stores the digital video signal Vd from an external supply means. The 3D conversion unit 5 receives the digital video signal Vd from an external supply unit or the video memory 4 and performs 3D conversion of the digital video signal Vd based on the control signal Ss from the control unit 2. The image quality control unit 6 performs image quality control, which will be described later, on the digital video signal Vd 3D-converted by the 3D conversion unit 5 and outputs the video signal Va to the liquid crystal module 7. In this specification, the liquid crystal module is used as the video display means, but other digital display devices such as a PDP and an EL can be used.

  The timing generator 3 acquires the video synchronization signal Vs from an external supply means and outputs various timing signals. Specifically, the timing signal Tm is output to the video memory 4 to control the timing of writing and reading in the video memory 4. In addition, the timing signal Td is output to the 3D conversion unit 5 to specify the amount of parallax in the 3D conversion. In addition, the timing signal Tv is output to the image quality control unit 6 to designate a range for image quality control.

  Further, the timing generator 3 outputs a timing signal Vb including a clock, a synchronization signal, a 2D / 3D switching signal, and the like to the liquid crystal module 7. These characteristics of the various timing signals output by the timing generator 3 are specified by the control signal Ss of the controller 2. The liquid crystal module 7 displays 2D and 3D video signals Va in accordance with the timing signal Vb.

<Operation>
Next, the outline and effects of 3D conversion and image quality control by the video display apparatus according to the present embodiment will be described with reference to FIGS. FIG. 2 shows a pixel arrangement when converting 2D video to 3D video, and FIG. 3 shows a display image on the display surface of the liquid crystal module 7.

  In the 2D video V2 received from the external supply means, pixels 1 to 1920 are arranged from the left end of the screen to the right end of the screen as shown in FIG. The image of the 2D video in the liquid crystal module 7 is as shown in FIG. 3A, and is assumed to be, for example, a diamond-shaped figure that fills the screen frame.

  In the video display device according to the present embodiment, the 3D conversion unit 5 creates the right-eye video Vrr and the left-eye video Vlr from the 2D video V2, and performs the 3D conversion in the protruding direction. As shown in FIG. 2, the right-eye video Vrr is obtained by shifting the 2D video V2 leftward by 5 pixels, while the left-eye video Vlr is obtained by shifting the 2D video V2 rightward by 5 pixels. . That is, the binocular parallax Dn is 10 dots. The images of the right-eye video Vrr and the left-eye video Vlr in the liquid crystal module 7 are as shown in the upper diagram of FIG. 3B. In the right-eye video, the left end is cut off from the display end, and in the left-eye video, the right end is extended from the display end. It has run out. Note that in the upper diagram of FIG. 3B, 2D video is also shown with a dotted line, but the video position seen when the viewer views it in 3D is virtually illustrated for the sake of easy understanding. Is not displayed on the screen.

  Further, in the video display device according to the present embodiment, the image quality control unit 6 controls the contrast of each pixel. As shown in FIG. 2, in the right-eye video Vrr, the contrast is changed by setting the sixth to thirteenth pixels, which are pixels within a predetermined range from the left end of the screen, as a region n. Here, an example in which the contrast control is performed for the sixth to thirteenth pixels will be described. The contrast control range is determined by the timing signal Tv of the timing generation unit 3, and the contrast change amount is determined by the control unit 2. It can be arbitrarily specified by the control signal Ss.

  In contrast control, the contrast of the normal pixel is Uc, the contrast of the sixth pixel is Uc × 0 = 0, the contrast of the thirteenth pixel is Uc × 1 = Uc, and the contrast is from the sixth pixel to the thirteenth pixel. Increase the value in steps. For example, the contrast of the seventh pixel is Uc × 0.14, and the contrast of the eighth pixel is Uc × 0.28. In FIG. 2, the underlined number in the frame indicates the ratio of contrast to Uc in the pixel.

  Similarly, in the left-eye video Vlr, the sixth to thirteenth pixels corresponding to the region n of the right-eye video Vrr are set as the region p, and the contrast is controlled in the region p. As in the area n, the contrast of the sixth pixel is Uc × 0 = 0, the contrast of the thirteenth pixel is Uc × 1 = Uc, and the contrast value gradually increases from the sixth pixel to the thirteenth pixel. To control. For example, the contrast of the seventh pixel is Uc × 0.14, and the contrast of the eighth pixel is Uc × 0.28. Further, the contrast values of all the first to fifth pixels located on the left side of the region p are set to Uc × 0 = 0.

  Although the pixel arrangement at the right end of the screen is omitted in FIG. 2, the same contrast control as that at the left end is performed at the right end of the screen. That is, control is performed so that the contrast gradually decreases from the pixel near the right end to the pixel at the right end.

  By contrast control in the image quality control unit 6, as shown in the lower diagram of FIG. 3B, in the regions n and p of the width h, the contrast gradually decreases from 0 to Uc toward both ends of the screen. The contrast of the region is Uc.

  FIG. 3C shows an image of 3D display viewed by the viewer. In the regions n and p, the image has a small contrast toward both ends, and it becomes gradually darker to the eye. Since the contrast is 0 outside the areas n and p, a black image is obtained.

  Here, the region of width h shown in FIG. 3C is a region that appears to protrude three-dimensionally as a result of 3D conversion. There are regions n and p at both ends of the region of width h, and in the video display device of the present embodiment, the contrast is gradually reduced toward both ends of the regions n and p. That is, since the display image is gradually darkened and the image information is reduced, it is possible to eliminate the unnaturalness that the image suddenly pops out at both ends of the 3D display area and the image is switched to the normal image. This is a case where the original video is lost due to the shifting of the 2D video. However, even when an object that is cut off halfway is displayed at the edge of the screen at the stage of the 2D video, near the screen edge as described above. Since the contrast gradually decreases as described above, it is possible to eliminate the unnaturalness that the display of the protruding object suddenly cuts off at the edge of the screen.

  According to the above method, since the enlargement ratio in the screen is not changed, the image is not distorted, and input images having various aspect ratios can be handled.

<Modification>
In the present invention, the contrast value is changed stepwise as image quality control in the image quality control unit 6, but the brightness may be changed stepwise instead of the contrast, or both may be changed simultaneously. .

  In addition to the above-described image quality control (first image quality control) at both the left and right ends of the display surface, image quality control (second image quality control) is performed to gradually reduce the contrast and brightness toward the edges at both the upper and lower ends. May be. Alternatively, only the second image quality control may be performed. When an object whose display is cut off is displayed at the upper and lower ends of the original video, the second image quality control is performed, so that the uncomfortable display can be suppressed.

  In the present invention, the image quality control unit 6 performs the image quality control after the 3D conversion unit 5 performs 3D conversion of the 2D video. However, the same effect can be obtained by performing the 3D conversion after the image quality control.

  Further, in this specification, the description has been given for a video display device that displays a 3D image in a pseudo manner, but the video display has a function of converting a 3D video image into a pop-up side using a 3D video image as an input. The present invention can also be applied to an apparatus.

<Effect>
The first video display device according to the present invention includes a three-dimensional conversion unit 5 that creates a right-eye image and a left-eye image for a three-dimensional image by shifting a two-dimensional input image in the horizontal direction, and the right-eye display device. Each of the image and the left-eye image includes an image quality control unit 6 that performs first image quality control that gradually reduces at least one of contrast and brightness from the pixels near the left and right edges to the pixels on the left and right edges. Therefore, when a two-dimensional input image is displayed in a pop-up after 3D conversion, it is possible to suppress a sense of incongruity such that the pop-out object is not displayed in the middle or no longer pops out in the middle at the left and right ends of the display. .

  Further, in the first video display device according to the present invention, the image quality control unit 6 includes the vicinity of the upper and lower ends of the right-eye image and the left-eye image together with or in place of the first image quality control. Since the second image quality control is performed to gradually reduce at least one of contrast and brightness from the above pixels to the pixels at the upper and lower ends, when the two-dimensional input image is 3D converted and displayed in a pop-up manner, At the end, it is possible to suppress a sense of discomfort such as an object that is popping out is not displayed on the way or is not popping out on the way.

  In addition, the second video display device according to the present invention provides a first image quality in which at least one of contrast and brightness is gradually reduced from a pixel in the vicinity of the left and right ends of the two-dimensional input image to the pixels on the left and right ends. An image quality control unit 6 that performs control, and a 3D conversion unit 5 that shifts the input image subjected to the image quality control in a horizontal direction to create a right-eye image and a left-eye image for a 3D image. When a two-dimensional input image is 3D-converted and displayed in a pop-up manner, it is possible to suppress a sense of incongruity such that the pop-out object is not displayed on the way or no longer appears on the way at the left and right ends of the display.

  Further, in the second video display device according to the present invention, the image quality control unit 6 is provided with the first image quality control or instead of the pixels from the upper and lower ends of the input image to the upper and lower ends of the pixels. Since the second image quality control is performed in which at least one of contrast and brightness is reduced step by step, when a two-dimensional input image is displayed in a pop-up after 3D conversion, the pop-up object is displayed in the middle at the upper and lower ends of the display. It is possible to suppress a sense of incongruity such as being not displayed or not popping out on the way.

  The first and second video display devices according to the present invention include a timing generation unit 3 that specifies a pixel range for performing image quality control in the image quality control unit 6, and a control unit 2 that specifies a control amount of the image quality control. Therefore, when a two-dimensional input image is displayed in a pop-up after 3D conversion, it is possible to suppress a sense of incongruity such that the popping-out object is not displayed in the middle or stops popping out in the middle at the left and right ends of the display. I can do it.

  DESCRIPTION OF SYMBOLS 1 Video display apparatus, 2 Control part, 3 Timing generation part, 4 Video memory, 5 3D conversion part, 6 Image quality control part, 7 Liquid crystal module

Claims (5)

A three-dimensional conversion unit that creates a right-eye image and a left-eye image for a three-dimensional image by shifting a two-dimensional input image in the horizontal direction;
An image quality control unit that performs first image quality control for gradually reducing at least one of contrast and brightness from a pixel near the left and right ends to a pixel on the left and right ends in each of the right-eye image and the left-eye image; With
Video display device. The image quality control unit, in each of the right-eye image and the left-eye image, together with or instead of the first image quality control, contrast and brightness of pixels from the upper and lower end pixels to the upper and lower end pixels. Performing a second image quality control stepwise reducing at least one of them,
The video display device according to claim 1. An image quality control unit that performs first image quality control that gradually reduces at least one of contrast and brightness from pixels near the left and right edges of the two-dimensional input image to the pixels at the left and right edges;
A three-dimensional conversion unit that creates a right-eye image and a left-eye image for a three-dimensional image by horizontally shifting the input image subjected to the image quality control;
Video display device. The image quality control unit gradually reduces at least one of contrast and brightness from the pixels near the upper and lower ends of the input image to the pixels at the upper and lower ends together with or instead of the first image quality control. Perform second image quality control,
The video display device according to claim 3. A timing generator for designating a pixel range for performing the image quality control;
A control unit that specifies a control amount of the image quality control;
The video display apparatus in any one of Claims 1-4.

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