JP2013187592A - Stereoscopic image display device and stereoscopic image display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce crosstalk between left-eye and right-eye images without lowering the brightness of video and thereby improve visibility.SOLUTION: A stereoscopic image display device 110 comprises: a data acquisition unit 150 which acquires left-eye video data and right-eye video data; a video generation unit 154 which generates sequential data consisting of alternately arranged rows of a left-eye video data string consisting of the left-eye video data which is repeated a predetermined number of times and a right-eye video data string consisting of the acquired right-eye video data which is repeated a predetermined number of times and also generates a control signal to control a shutter eyeglass to open or close it on the basis of the sequential data; and a picture quality reducing unit 156 which performs picture quality reducing process on target data which is among sequential data the frame data corresponding to one or both of frames before and after switching of the left-eye video data and the right-eye video data.

Description

  The present invention relates to a stereoscopic video display apparatus and a stereoscopic video display method for displaying video perceived as stereoscopic video through shutter glasses.

  In recent years, for two-eye parallax video data (left-eye video data and right-eye video data), which are alternately displayed at a predetermined frame period on a display unit, and for users wearing shutter glasses 3D image technology that perceives 3D images is in the spotlight.

  The shutter glasses have two shutters that open and close in synchronization with a predetermined frame period of the video data, and during the period in which the left-eye video based on the left-eye video data is displayed on the display unit, the left-eye shutter And close the right-eye shutter. On the other hand, the shutter glasses are configured to open the right-eye shutter and close the left-eye shutter during a period in which the right-eye video based on the right-eye video data is displayed on the display unit (for example, patents). References 1, 2).

JP-A-8-327961 JP-A-6-178325

  When the left-eye video and the right-eye video are displayed alternately, there is a limit to the switching speed of the video on the display unit, so one of the left-eye video and the right-eye video is partially afterimage. And the so-called crosstalk, which is mixed and displayed in the other video, occurs. When crosstalk occurs, the user may see a double outline of the subject or the like, resulting in an image that is difficult to see.

  In view of this, a configuration has been implemented in which the left-eye video in the same frame and the right-eye video in the same frame are continuously displayed a plurality of times. For example, even if there is a crosstalk that switches from left-eye video to right-eye video and part of the left-eye video is mixed into the right-eye video, the right-eye video of the same frame immediately Is displayed again. Then, for example, in the case of a liquid crystal monitor, a voltage for displaying an image of the same frame is applied a plurality of times. Therefore, compared with the case where the image is applied only once, the time required for the left-eye image mixed in the right-eye image to completely switch to the right-eye image can be shortened. However, immediately after switching from the left-eye video to the right-eye video or from the right-eye video to the left-eye video, crosstalk remains even for a short time.

  Therefore, a technique is known in which the influence of crosstalk is suppressed by closing both the left and right shutters of shutter glasses during a period in which an image in which crosstalk has occurred is displayed. In addition, measures may be taken to turn off the backlight during a period in which a video with crosstalk is displayed. However, in either case, the time during which the left-eye video and the right-eye video can be viewed is shortened, and as a result, the perceived brightness of the video is reduced.

  Therefore, in view of such a problem, the present invention can improve the visibility by reducing the crosstalk between the video for the left eye and the video for the right eye without reducing the brightness of the video. It is an object of the present invention to provide a stereoscopic video display device and a stereoscopic video display method.

  In order to solve the above-described problem, a stereoscopic video display apparatus according to the present invention is acquired by a data acquisition unit that acquires video data for left eye and video data for right eye for perceiving stereoscopic video by binocular parallax. And generating sequential data by alternately arranging a left-eye video data sequence obtained by repeating a predetermined number of left-eye video data and a right-eye video data sequence obtained by repeating a predetermined number of acquired right-eye video data. A video generation unit that generates a control signal for controlling the opening and closing of the shutter glasses based on the sequential data, and one of the sequential data before and after switching of the left-eye video data and the right-eye video data Alternatively, an image quality reduction unit that performs processing for reducing the image quality of the target data, which is frame data corresponding to both frames, and the image quality of the target data are reduced. Characterized in that it comprises a display unit for displaying an image based on sequential data after.

  The image quality reduction unit may reduce the image quality of the target data by blurring a contour in the target data.

  The image quality reduction unit may pass the target data through a filter and blur the outline of the target data.

  The image quality reduction unit may reduce the image quality of the target data by reducing the contrast range of the target data.

  The video generation unit opens the shutter for the left eye of the shutter glasses and closes the shutter for the right eye during the entire period in which the video based on the video data sequence for the left eye is displayed, and the video based on the video data sequence for the right eye The control signal for closing the shutter for the left eye of the shutter glasses and opening the shutter for the right eye may be generated for the entire period when is displayed.

  The predetermined number may be three.

  The target data may be frame data after switching between left-eye video data and right-eye video data among sequential data.

  In order to solve the above problems, the stereoscopic image display method of the present invention acquires left-eye video data and right-eye video data for perceiving stereoscopic video based on binocular parallax, and acquires the acquired left-eye video. Generates sequential data by alternately arranging a left-eye video data sequence obtained by repeating a predetermined number of data and a right-eye video data sequence obtained by repeating a predetermined number of acquired right-eye video data, and based on the sequential data. , Generating a control signal for controlling opening / closing of the shutter glasses, and frame data corresponding to one or both of the sequential data before and after switching of the left-eye video data and the right-eye video data The target data is processed to reduce the image quality, and the video based on the sequential data after the image quality of the target data is reduced is displayed. Characterized in that it.

  According to the present invention, it is possible to improve the visibility by reducing the crosstalk between the left-eye video and the right-eye video without reducing the brightness of the video.

It is explanatory drawing which showed the schematic connection relation of the three-dimensional video display system in 1st Embodiment. It is the functional block diagram which showed the rough connection relation of the three-dimensional video display apparatus in 1st Embodiment. It is a functional block diagram showing a schematic connection relationship of shutter glasses in the first embodiment. It is explanatory drawing for demonstrating an image quality fall process. It is explanatory drawing for demonstrating the image | video displayed on the display part in 1st Embodiment, and the opening / closing timing of shutter glasses. It is explanatory drawing for demonstrating the image | video displayed on the display part in a comparative example, and the opening / closing timing of shutter glasses. It is explanatory drawing for demonstrating a modification. It is explanatory drawing for demonstrating the image | video displayed on the display part in a modification, and the opening / closing timing of shutter glasses. It is the flowchart which showed the whole flow of the three-dimensional video display method in 1st Embodiment. It is the functional block diagram which showed the rough connection relation of the three-dimensional video display apparatus in 2nd Embodiment. It is explanatory drawing for demonstrating the image | video displayed on the display part in 2nd Embodiment, and the opening / closing timing of shutter glasses. It is the flowchart which showed the whole flow of the stereo image display method in 2nd Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment: stereoscopic image display system 100)
FIG. 1 is an explanatory diagram showing a schematic connection relationship of the stereoscopic video display system 100 according to the first embodiment. As shown in FIG. 1, the stereoscopic video display system 100 includes a video playback device 102, a stereoscopic video display device 110, and shutter glasses 120.

  The video playback apparatus 102 converts stereoscopic video data (left-eye video data and right-eye video data), which are two video data having binocular parallax, into side-by-side, top-and-bottom, line-by-line, and frame sequential. The image is output to the stereoscopic image display device 110 by a predetermined method for perceiving a stereoscopic image such as a method.

  The stereoscopic video display device 110 is, for example, a liquid crystal panel display device, and sequentially displays a left-eye video and a right-eye video based on various types of stereoscopic video data output from the video playback device 102. Then, the image is displayed on the display unit by a frame sequential method that is visually recognized through the shutter glasses 120.

  When the user 130 wears the shutter glasses 120 and the shutter glasses 120 are positioned between the stereoscopic video display device 110 and the eyes of the user 130, the shutter glasses 120 open and close the right eye shutter and the left eye shutter. As a result, the left eye image is visually recognized by the user 130 and the right eye image is visually recognized by the right eye of the user 130. In this way, the user 130 can perceive the image three-dimensionally.

  Next, specific configurations of the stereoscopic image display device 110 and the shutter glasses 120 will be described.

(3D image display device 110)
FIG. 2 is a functional block diagram illustrating a schematic connection relationship of the stereoscopic image display apparatus 110 according to the first embodiment. As shown in FIG. 2, the stereoscopic video display device 110 includes a data acquisition unit 150, a buffer memory 152, a video generation unit 154, an image quality reduction unit 156, a display unit 158, and a control output unit 160. Composed.

  The data acquisition unit 150 generates stereoscopic video data (right-eye video data and left-eye video data) that is data for forming a right-eye video and a left-eye video for perceiving a stereoscopic video, for example, a video playback device. 102.

  The buffer memory 152 includes a RAM, a flash memory, an HDD, and the like, and temporarily holds the stereoscopic video data acquired by the data acquisition unit 150.

  The video generation unit 154 sequentially reads the stereoscopic video data from the buffer memory 152, and executes a predetermined number of frame data corresponding to one frame for each of the left-eye video data and the right-eye video data constituting the stereoscopic video data. In the embodiment, the left-eye video data sequence and the right-eye video data sequence are generated three times.

  Then, the video generation unit 154 generates sequential data in which the left-eye video data sequence and the right-eye video data sequence are alternately arranged. In addition, the video generation unit 154 generates a control signal for controlling the opening / closing of the shutter glasses 120 based on the generated sequential data.

  The image quality reduction unit 156 includes a filter, and among the generated sequential data, the target data that is frame data of one or both before and after switching of the left-eye video data and the right-eye video data. On the other hand, an image quality reduction process for reducing the image quality by performing filtering is performed. The image quality reduction process by the image quality reduction unit 156 will be described in detail later.

  The display unit 158 is configured by, for example, a liquid crystal panel, and sequentially displays a right-eye video and a left-eye video having binocular parallax based on sequential data after the image quality of target data is reduced.

  The control output unit 160 generates a control signal for controlling the open / close timing of the left and right shutters (the left-eye shutter 224 and the right-eye shutter 226 described later) of the shutter glasses 120 based on the frame period of the sequential data, The data is output to the shutter glasses 120 through wireless communication such as infrared data of IrDA (Infrared Data Association) standard.

(Shutter glasses 120)
FIG. 3 is a functional block diagram illustrating a schematic connection relationship of the shutter glasses 120 according to the first embodiment. As shown in FIG. 3, the shutter glasses 120 include a control acquisition unit 220, a shutter control unit 222, a left eye shutter 224, and a right eye shutter 226.

  The control acquisition unit 220 acquires the control signal output by the control output unit 160. The shutter control unit 222 controls the opening / closing timing of the right-eye shutter 226 and the left-eye shutter 224 according to the control signal acquired by the control acquisition unit 220.

  When the user 130 wears the shutter glasses 120, the right-eye shutter 226 is positioned in front of the right eye and opens and closes an optical path incident on the right eye. When the user 130 wears the shutter glasses 120, the left-eye shutter 224 is positioned in front of the left eye and opens and closes an optical path incident on the left eye.

  The schematic configurations of the stereoscopic image display device 110 and the shutter glasses 120 have been described above. Subsequently, after detailed description of the characteristic image quality reduction processing in the present embodiment, the effect of the stereoscopic video display device 110 will be described in comparison with a comparative example.

  FIG. 4 is an explanatory diagram for explaining the image quality reduction process. As shown in the conceptual diagram of FIG. 4A, the image quality reduction unit 156 includes a filter including a plurality (seven in this embodiment) of shift registers X (1) to X (7).

  For each of the shift registers X (1) to X (7), the weighting coefficients are 0.1 for the shift register X (1), 0.2 for the shift register X (2), and for the shift register X (3). 0.3, 0.4 for shift register X (4), 0.3 for shift register X (5), 0.2 for shift register X (6), 0 for shift register X (7) .1, are assigned. Here, with respect to an arbitrary pixel, the pixel values of three pixels adjacent to the right and left of the pixel (a total of seven pixels) are read out, and the above weighting is performed and leveled. Then, the average value becomes the pixel value after the image quality lowering process of any one pixel.

  In the present embodiment, the image quality degradation unit 156 uses both the frame data before and after the switching of the left-eye video data and the right-eye video data as the target data in the present embodiment, and the read pixel value is At any time, the data is stored in the shift registers X (1) to X (7). Therefore, when the seven pixel values are stored, the first stored pixel value is stored in X (7), and the last stored pixel value is stored in X (1). Here, the pixel value to be processed by the image quality reduction unit 156 is, for example, a luminance value for each pixel.

  Thus, the image quality reduction unit 156 stores the pixel values of the target data for each pixel from the shift registers X (1) to X (7). As a result, the pixel value closer to the shift register X (1) is stored as a new pixel value (inputted later in time), and the pixel value closer to the shift register X (7) is older (inputted earlier in time). Is stored.

  Then, the image quality lowering unit 156 multiplies the weighting coefficients assigned to the shift registers X (1) to X (7), adds the pixel values after multiplication, and divides by 1.6. Then, the image quality reduction unit 156 outputs the division value as a pixel value after the image quality reduction processing of the pixel corresponding to the shift register X (4).

  Subsequently, the data in the shift register X (7) is deleted, and the pixel values stored in the shift registers X (1) to (6) are sequentially raised to the shift registers X (2) to (7), respectively. . The shift register X (1) stores pixel values for one new pixel.

  FIG. 4B shows pixel value waveform images 260 a and 260 b for the target data before and after being input to the image quality reduction unit 156. When the above-described processing from weighting coefficient multiplication to data carry-over is repeated, the output pixel value (the pixel value stored in the shift register X (4)) approaches the preceding and succeeding pixel values.

  Therefore, a sudden change in the pixel value is alleviated, and the pixel value smoothly changes from the waveform image 260a in FIG. 4B to the waveform image 260b. In other words, the image quality reduction unit 156 functions as a digital filter that excludes high frequency components and allows low frequency components to pass. Although the case where the image quality reduction unit 156 is a digital filter has been described here, the image quality reduction unit 156 may be an analog filter.

  As described above, when the image quality reduction unit 156 functioning as a digital filter passes, the video indicated by the target data becomes blurry due to a gentle change in a portion where the pixel value changes rapidly, such as in the vicinity of the contour of the subject. That is, the image quality reduction unit 156 reduces the image quality of the target data by blurring the outline of the target data (image quality reduction processing).

  With the configuration in which the image quality reduction unit 156 functions as a filter, the image quality reduction processing of the target data can be performed simply by passing it through the filter, and no complicated control is required, thereby reducing the manufacturing cost of the stereoscopic video display device 110. It becomes possible.

  FIG. 5 is an explanatory diagram for explaining an image displayed on the display unit 158 and the opening / closing timing of the shutter glasses 120 in the first embodiment, and FIG. 6 is an image displayed on the display unit in the comparative example. FIG. 5 is an explanatory diagram for explaining opening / closing timing of shutter glasses.

  The video displayed on the display unit 158 (hereinafter referred to as display video) is a part of one of the left-eye video and the right-eye video after switching between the left-eye video and the right-eye video. So-called crosstalk is generated as an afterimage mixed with the other remaining video. When the crosstalk occurs, the user 130 may visually recognize the outline of the subject or the like, resulting in an image that is difficult to see.

  In order to prevent the user 130 from seeing the crosstalk, in the comparative example shown in FIG. 6, the same left frame image for the same frame is displayed twice and the same right frame image for the same frame is displayed twice. While the video in which the talk is occurring is displayed, both the left eye shutter and the right eye shutter of the shutter glasses are closed.

  In the configuration of such a comparative example, the open time of each of the left-eye shutter and the right-eye shutter is 1/3 of the closed time. That is, the left-eye shutter and the right-eye shutter are each closed for 3/4 of the entire time, and are visually recognized as dark images.

  In the present embodiment, as shown in FIG. 5, the image quality reduction unit 156 performs the above-described image quality reduction processing using the frame data before and after switching of the left-eye video and the right-eye video as target data, that is, Then, a process for blurring the outline of the target data is performed. Then, the video immediately before the switching between the left-eye video and the right-eye video (hereinafter referred to as the previous video) and the video immediately after (hereinafter referred to as the subsequent video) are blurred, so that the crosstalk becomes inconspicuous. Therefore, it is not necessary to shield the image with the shutter glasses 120.

  Therefore, the video generation unit 154 performs the left eye shutter 224 of the shutter glasses 120 for the entire period in which the video based on the frame data (left eye video data sequence) repeated three times is displayed for the left eye video data. Is opened, the right-eye shutter 226 is closed, and the right-eye video data is stored in the shutter glasses 120 for the entire period in which video based on the frame data (right-eye video data sequence) repeated three times is displayed. A control signal for closing the left-eye shutter 224 and opening the right-eye shutter 226 is generated.

  Then, the shutter control unit 222 of the shutter glasses 120 follows the control signal, and the left-eye shutter of the shutter glasses 120 for the entire period in which the video based on the frame data repeated three times is displayed for the left-eye video data. 224 is opened, the right-eye shutter 226 is closed, and the left-eye shutter 224 of the shutter glasses 120 is closed for the entire period in which the video based on the frame data repeated three times is displayed for the right-eye video data. Then, the right-eye shutter 226 is opened.

  Therefore, the stereoscopic image display apparatus 110 can open half of the entire period for each of the left-eye shutter 224 and the right-eye shutter 226, and the left-eye image can be displayed without reducing the brightness of the image. And crosstalk between the right-eye video and the video can be improved.

(Modification)
FIG. 7 is an explanatory diagram for explaining a modification example, and FIG. 7A is a functional block for explaining the configuration of the image quality reduction unit 256 in the modification example. As shown in FIG. 7A, the image quality reduction unit 256 includes an APL detection unit 256a and a gain multiplication unit 256b.

  The APL detection unit 256a calculates an average picture level (APL) for the target data among the sequential data output from the video generation unit 154.

  The gain multiplication unit 256b multiplies the difference between each pixel value and the average image level by a gain less than 1. Then, the gain multiplication unit 256b adds the average image level to the multiplied value. Thus, the gain multiplication unit 256b reduces the pixel value range around the average image level calculated by the APL detection unit 256a. After that, the gain multiplication unit 256b outputs sequential data to the display unit 158 including the target data whose range has been reduced.

  FIG. 7B shows pixel value waveform images 270a and 270b for the target data before and after being input to the gain multiplication unit 256b. In contrast to the waveform image 270a, the waveform image 270b that has passed through the gain multiplier 256b has a smaller amplitude around the APL 272. In other words, the change width of the pixel value of the target data is reduced by passing through the gain multiplication unit 256b.

  As described above, when the image quality reduction unit 256 passes, the range of pixel values, for example, luminance values, of the video indicated by the target data becomes narrow. That is, the image quality reduction unit 256 reduces the image quality of the target data by reducing the contrast range of the target data (image quality reduction processing).

  FIG. 8 is an explanatory diagram for explaining the video displayed on the display unit 158 and the opening / closing timing of the shutter glasses 120 in the modified example.

  As shown in FIG. 8, the image quality reduction unit 256 uses the frame data before and after the switching between the left-eye video and the right-eye video as the target data. Apply processing to reduce the range.

  Then, since the contrast of the front video and the rear video is lowered, the crosstalk becomes inconspicuous, and it is not necessary to shield the video with the shutter glasses 120. Thus, each of the left-eye shutter 224 and the right-eye shutter 226 can be opened for half of the entire period, and the left-eye video and the right-eye video can be reduced without reducing the brightness of the video. Crosstalk can be reduced and video visibility can be improved.

(3D image display method)
Next, a stereoscopic video display method for displaying sequential data using the above-described stereoscopic video display device 110 will be described. FIG. 9 is a flowchart showing an overall flow of the stereoscopic image display method according to the first embodiment. The process shown in FIG. 9 is repeatedly executed at a predetermined cycle while the stereoscopic video display device 110 is instructed to display sequential data.

  The data acquisition unit 150 acquires stereoscopic video data for one frame (left-eye video data and right-eye video data each for one frame), for example, from the video playback device 102 and stores it in the buffer memory 152 (S300). The video generation unit 154 reads one frame of the stereoscopic video data from the buffer memory 152, and repeats the frame data corresponding to one frame three times for each of the left-eye video data and the right-eye video data constituting the stereoscopic video data. The left-eye video data sequence and the right-eye video data sequence are generated (S302).

  The video generation unit 154 generates sequential data in which continuous left-eye video data sequences and continuous right-eye video data sequences are alternately arranged (S304). Further, the video generation unit 154 generates a control signal for controlling opening / closing of the shutter glasses 120 based on the generated sequential data (S306). The control output unit 160 outputs the generated control signal to the shutter glasses 120 as needed.

  Then, the image quality reduction unit 156 selects one frame data from the sequential data in the order of arrangement (S308), and the selected frame data is either before or after the switching of the left-eye video data and the right-eye video data. It is determined whether or not it is in any position (whether it is target data) (S310).

  If it is target data (YES in S310), the image quality reduction unit 156 performs an image quality reduction process (S312). If it is not the target data (NO in S310), the image quality reduction process is not performed.

  Subsequently, the image quality reduction unit 156 outputs the frame data to the display unit 158 without performing the image quality reduction process if the target data is the target data, and then directly outputs the frame data to the display unit 158 (S314). The display unit 158 displays the right-eye video or the left-eye video based on the output sequential data (S316).

  Then, the image quality reduction unit 156 determines whether or not all the frame data has been selected for one frame of the stereoscopic video data (left-eye video data and right-eye video data are each one frame) (S318). ). If unselected frame data still remains (NO in S318), the process proceeds to frame data selection step S308. If all the frame data have been selected (YES in S318), the process proceeds to stereoscopic video data acquisition step S300.

  Also by such a stereoscopic video display method, the crosstalk between the left-eye video and the right-eye video can be reduced and the video visibility can be improved without reducing the brightness of the video.

(Second Embodiment)
In the first embodiment described above, the stereoscopic video display device 110 that displays the same left-eye video and the same right-eye video on the display unit 158 three times in succession has been described. In the second embodiment, a stereoscopic video display apparatus 410 that displays the same left-eye video and the same right-eye video twice on the display unit 158 will be described. Note that the shutter glasses 120 constituting the stereoscopic video display system together with the stereoscopic video display device 410 have substantially the same function as the shutter glasses 120 of the first embodiment described above, and a duplicate description thereof will be omitted.

(3D image display device 410)
FIG. 10 is a functional block diagram illustrating a schematic connection relationship of the stereoscopic video display device 410 according to the second embodiment. As shown in FIG. 10, the stereoscopic video display device 410 includes a data acquisition unit 150, a buffer memory 152, a video generation unit 454, an image quality reduction unit 456, a display unit 158, and a control output unit 160. Composed. Since the data acquisition unit 150, the buffer memory 152, the display unit 158, and the control output unit 160, which have already been described as constituent elements in the first embodiment, have substantially the same functions, redundant description will be omitted.

  The video generation unit 454 sequentially reads the stereoscopic video data from the buffer memory 152 and repeats the frame data corresponding to one frame twice for each of the left-eye video data and the right-eye video data constituting the stereoscopic video data. An eye video data sequence and a right eye video data sequence are generated.

  Then, the video generation unit 454 generates sequential data in which continuous left-eye video data sequences and continuous right-eye video data sequences are alternately arranged. In addition, the video generation unit 454 generates a control signal for controlling the opening / closing of the shutter glasses 120 based on the generated sequential data.

  The image quality reduction unit 456 is configured by a filter, and performs image quality reduction processing to reduce the image quality by filtering the target data among the generated sequential data. In the first embodiment described above, the target data is both the frame data before and after the switching of the left-eye video data and the right-eye video data, but in this embodiment, the target data is This is frame data after switching between left-eye video data and right-eye video data.

  FIG. 11 is an explanatory diagram for explaining an image displayed on the display unit 158 and the opening / closing timing of the shutter glasses 120 according to the second embodiment.

  As illustrated in FIG. 11, the image quality reduction unit 456 performs image quality reduction processing similar to the image quality reduction unit 156, that is, the outline of the target data, using the frame data after switching between the left-eye video and the right-eye video as target data. Apply a process to blur. Then, since the subsequent video is blurred, the crosstalk becomes inconspicuous. Therefore, it is not necessary to shield the image with the shutter glasses 120.

  Accordingly, the video generation unit 454 opens the left-eye shutter 224 of the shutter glasses 120 and the right-eye shutter 226 for the entire period in which the video based on the frame data repeated twice is displayed for the left-eye video data. Is closed, the left eye shutter 224 of the shutter glasses 120 is closed, and the right eye shutter 226 is opened for the entire period in which the video based on the frame data repeated twice is displayed for the right eye video data. A control signal to be generated is generated. The shutter controller 222 of the shutter glasses 120 opens and closes the left-eye shutter 224 and the right-eye shutter 226 in accordance with this control signal.

  In this way, the stereoscopic video display apparatus 410 can open half of the entire period for each of the left-eye shutter 224 and the right-eye shutter 226, and does not reduce the brightness of the video.

  In the second embodiment, the previous video is not blurred and the video (crosstalk) mixed in the subsequent video is not blurred. In the first embodiment, the previous video is blurred and the video mixed in the rear video is also blurred. Therefore, the crosstalk of the rear video is less noticeable in the first embodiment than in the second embodiment.

  However, even in the second embodiment, since the entire video is blurred in the subsequent video, crosstalk is less noticeable than in the case where the image quality reduction process is not performed. In the first embodiment, for each of the left-eye video data and the right-eye video data, video based on the same frame data must be continuously displayed three times. However, in the present embodiment, the same frame data may be displayed twice in succession, and the processing load on the stereoscopic video display device 410 can be reduced.

  In addition, since the image quality reduction unit 456 performs image quality reduction processing using the frame data after switching between the left-eye video and the right-eye video as target data, the display unit 158 displays the video after the video subjected to the image quality reduction processing. In the same frame, a clear image that has not been subjected to the image quality reduction process is redisplayed. In this case, since the video displayed later is seen more dominantly, the stereoscopic video display device 410 can make the crosstalk less noticeable while allowing the user 130 to visually recognize a clear video.

  In the present embodiment, the image quality reduction unit 456 uses the frame data after switching between the left-eye video and the right-eye video as target data, but the frame data before switching between the left-eye video and the right-eye video. May be the target data. In this case, the previous video is blurred and the video mixed in the rear video is also blurred. For this reason, it is possible to effectively make the crosstalk of the subsequent video inconspicuous.

(3D image display method)
Next, a stereoscopic video display method for displaying sequential data using the above-described stereoscopic video display device 410 will be described. FIG. 12 is a flowchart showing an overall flow of the stereoscopic image display method according to the second embodiment. Similar to the first embodiment, the process shown in FIG. 12 is repeatedly executed at a predetermined frame period while the stereoscopic image display apparatus 410 is instructed to display sequential data.

  The data acquisition unit 150 acquires stereoscopic video data for one frame, for example, from the video playback device 102 and stores it in the buffer memory 152 (S300). The video generation unit 454 reads one frame of the stereoscopic video data from the buffer memory 152, and repeats frame data corresponding to one frame twice for each of the left-eye video data and the right-eye video data constituting the stereoscopic video data. The left-eye video data sequence and the right-eye video data sequence are generated (S502).

  The video generation unit 454 generates sequential data in which continuous left-eye video data sequences and continuous right-eye video data sequences are alternately arranged (S504).

  Hereinafter, since the processing from the control signal generation step S306 to the frame data selection step S308 is substantially the same as the processing described in the first embodiment, the same reference numerals are given and description thereof is omitted.

  Then, the image quality reduction unit 456 determines whether the selected frame data is frame data after switching between the left-eye video data and the right-eye video data (whether it is target data) ( S510).

  Hereinafter, since the processing from the image quality degradation processing step S312 to the frame end determination step S318 is substantially the same as the processing described in the first embodiment, the same reference numerals are given and description thereof is omitted.

  Also by such a stereoscopic video display method, the crosstalk between the left-eye video and the right-eye video can be reduced and the video visibility can be improved without reducing the brightness of the video.

  In the first embodiment described above, the frame data corresponding to one frame both before and after the switching of the left-eye video data and the right-eye video data is set as the target data. However, the target data may be either before or after switching between the left-eye video data and the right-eye video data.

  In the above-described second embodiment, the case where the image quality reduction unit 456 passes the target data through the filter and blurs the outline of the subject of the target data has been described. However, the image quality reduction unit is the same as the image quality reduction unit 256. Similarly, the contrast range of the target data may be reduced.

  In the first embodiment and the second embodiment described above, the image quality reduction units 156 and 456 explain the case where the target data is passed through the filter to blur the contour of the subject of the target data. In the above description, the image quality reduction unit 256 reduces the contrast range of the target data. However, in any of the embodiments, the image quality reduction unit passes the target data through a filter and outlines the subject of the target data. In addition to blurring, the contrast range of the target data may be reduced. In this case, the image quality reduction unit may reduce the intensity of each process compared to the case where only one of the processes for reducing the range of the blur and the contrast range is performed on the target data. Crosstalk can be sufficiently reduced. Therefore, the image quality degradation unit can minimize degradation of image quality due to image quality degradation processing.

  Note that each step of the stereoscopic image display method of the present specification does not necessarily have to be processed in time series in the order described in the flowchart, and may include processing in parallel or by a subroutine.

  INDUSTRIAL APPLICABILITY The present invention can be used for a stereoscopic video display device and a stereoscopic video display method for displaying video perceived as stereoscopic video through shutter glasses.

110 ... stereoscopic image display device 120 ... shutter glasses 150 ... data acquisition unit 154 ... video generation unit 156, 256 ... image quality reduction unit 158 ... display unit 224 ... left eye shutter 226 ... right eye shutter

Claims (8)

A data acquisition unit for acquiring left-eye video data and right-eye video data for perceiving stereoscopic video with binocular parallax;
Sequential sequence of left-eye video data sequence obtained by repeating a predetermined number of acquired left-eye video data and right-eye video data sequence obtained by repeating the predetermined number of acquired right-eye video data A video generation unit that generates data and generates a control signal for controlling opening and closing of the shutter glasses based on the sequential data;
Among the sequential data, the image quality is reduced with respect to target data that is frame data corresponding to one or both of the left-eye video data and the right-eye video data before and after switching. An image quality degradation unit that performs processing,
A display unit for displaying an image based on the sequential data after reducing the image quality of the target data;
A stereoscopic video display device comprising:   The stereoscopic image display apparatus according to claim 1, wherein the image quality reduction unit reduces the image quality of the target data by blurring an outline in the target data.   The stereoscopic image display apparatus according to claim 2, wherein the image quality reduction unit passes the target data through a filter and blurs an outline in the target data.   The stereoscopic image display apparatus according to claim 1, wherein the image quality reduction unit reduces the image quality of the target data by reducing a contrast range of the target data.   The video generation unit opens the left-eye shutter of the shutter glasses and closes the right-eye shutter for the entire period in which video based on the left-eye video data sequence is displayed, and the right-eye video data 5. The control signal for generating the shutter signal for closing the left eye and opening the shutter for the right eye of the shutter glasses for the entire period in which the video based on the column is displayed. The three-dimensional image display apparatus according to item 1.   The stereoscopic image display apparatus according to claim 1, wherein the predetermined number is three.   The target data is frame data after switching between the left-eye video data and the right-eye video data among the sequential data. 3D image display device. Obtain left-eye video data and right-eye video data for perceiving stereoscopic video with binocular parallax,
Sequential data obtained by alternately arranging a left-eye video data sequence obtained by repeating a predetermined number of the obtained left-eye video data and a right-eye video data sequence obtained by repeating the predetermined number of the obtained right-eye video data. And generating a control signal for controlling opening and closing of the shutter glasses based on the sequential data,
Among the sequential data, the image quality is reduced with respect to target data that is frame data corresponding to one or both of the left-eye video data and the right-eye video data before and after switching. Process
A stereoscopic image display method, comprising: displaying an image based on the sequential data after the image quality of the target data is reduced.