JP2007072269A - Stereoscopic display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To present an observation angle for observing an accurate stereoscopic image free from distortion, in a stereoscopic display device for stereoscopic-vision. <P>SOLUTION: The stereoscopic display device 100 comprises: a backlight 101 for emitting image displaying light from behind; an image display part 102 provided with a plurality of pixels; a parallax barrier 103 for separating the image into images corresponding to right and left eyes in order to stereoscopically display the 3D image; and an observation angle presenting barrier 104 constituted of liquid crystal, presenting an index for viewing the stereoscopic image free from the distortion from an appropriate position when the display device is placed on a horizontal plane, and the appropriate observation angle can be attained by changing the transmission position of the light. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stereoscopic display device capable of stereoscopically viewing a three-dimensional image.

  Conventionally, various methods for displaying a three-dimensional image have been proposed. Among them, what is generally used is a so-called “binocular type” that uses binocular parallax. Prepare a left-eye image and a right-eye image with binocular parallax, and look at the subject directly by looking at the left-eye image with the left eye and the right-eye image with the right eye. A feeling can be obtained.

  In the method of creating a stereoscopic print, a method such as an anaglyph method in which images with binocular parallax are superimposed mainly using two colors, red and blue, and stereoscopically viewed with a glass having no common transmission wavelength range. It has been known. As an example of stereoscopic viewing with such a printed matter, there is “a manufacturing method of a stereoscopic viewing printed matter, a stereoscopic viewing printed matter” described in Patent Document 1. When viewing a printed material on a horizontal surface, the printed material is viewed from an oblique direction. At this time, the camera is placed at the viewpoint position to shoot a stereoscopic image. The distance between the vertices of the image captured at this time decreases as the distance from the viewpoint increases. If this is printed as a three-dimensional image as it is, and this printed matter is placed on a horizontal plane and observed, there will be a discrepancy in the sense of depth, so the processing to eliminate the sense of depth (perspective) of the photographed image is performed and printed. Therefore, there is little contradiction between focus adjustment and a feeling of depth, and natural stereoscopic viewing is possible.

  In recent years, display devices capable of stereoscopic viewing have been proposed, and there are several methods such as a time-division method, a parallax barrier method, and a polarization filter method as representative methods of the binocular type. Among these, a time division method and a parallax barrier method will be described as an example.

  FIG. 24 is a conceptual diagram for explaining the time division method.

  As shown in FIG. 24, in this time division method, the left eye image and the right eye image are alternately arranged every other pixel in the vertical direction, and the display of the left eye image and the display of the right eye image are alternately performed. It is displayed by switching.

  The left-eye image and the right-eye image have a vertical resolution that is ½ that of normal two-dimensional display. The observer wears shutter-type glasses that open and close in synchronization with the display switching cycle. The shutter used here opens the left eye side and closes the right eye side when the left eye image is displayed, and closes the left eye side and opens the right eye side when the right eye image is displayed. By doing so, the left eye image is observed only by the left eye, and the right eye image is observed only by the right eye, and stereoscopic viewing can be performed.

  FIG. 25 is a conceptual diagram for explaining the parallax barrier method.

  FIG. 25A is a diagram illustrating the principle of generating parallax. On the other hand, FIG. 25B is a diagram showing a screen displayed by the parallax barrier method.

  In FIG. 25A, an image in which the left eye image and the right eye image as shown in FIG. 25B are alternately arranged every other pixel in the horizontal direction is displayed on the image display panel 600. By placing a parallax barrier 601 having slits at an interval narrower than the interval between pixels of the same viewpoint on the front surface of the image display panel 600, the left eye image is observed only by the left eye 602 and the right eye image is observed only by the right eye 603. Therefore, stereoscopic viewing can be performed.

  Further, the same function can be realized even if the arrangement positions of the parallax barrier 601 and the image display panel 600 are reversed, and a conceptual diagram showing the principle is shown in FIG. As in FIG. 25A, the left eye image can be viewed stereoscopically by observing only with the left eye 602 and the right eye image with only the right eye 603.

  In addition to the above, there is a lenticular method in which an image of the format shown in FIG. 25B is stereoscopically displayed using a lenticular lens arranged on the front surface in the same manner as the parallax barrier method.

In such a parallax barrier type or lenticular type stereoscopic display device capable of stereoscopic viewing, the observation positions at which stereoscopic viewing is possible are limited. If the user's head to be observed is displaced in the left-right direction, the left-eye image and right-eye image that have reached the left and right eyes will not be properly divided, and the left and right images will be presented oppositely depending on the amount of displacement. turn into. Therefore, a method for determining an appropriate observation position has been proposed. In the “autostereoscopic display device” described in Patent Document 2 below, an appropriate stereoscopic image is observed by using a part of the parallax optical device used to divide the left and right images in conjunction with the signal display unit. It is possible to present an observable signal image only within a possible range. As a result, it can be determined whether or not it is within a stereoscopically viewable range, and the display unit and the observation position presentation unit are integrated with the stereoscopic display device. Therefore, the display unit and the observation position presentation unit do not have to be aligned.
Japanese Patent No. 3579683 JP-A-10-229567

  However, in the case of stereoscopic viewing with an image on a horizontal plane as in the stereoscopic printed matter described in Patent Document 1, the stereoscopic image is distorted if the viewing angle of the printed matter is different from the viewpoint position assumed at the time of shooting. There is a problem that it cannot be observed properly.

  Further, the display device described in Patent Document 2 shows a method of presenting an appropriate observation position in the left-right direction, but it is not assumed that the display device is placed on a horizontal plane, and the vertical direction of the screen It is impossible to present the observation position with respect to, that is, the observation angle between the display surface and the viewpoint.

  The present invention has been made to solve the above-described problems, and presents an appropriate observation angle that enables natural stereoscopic viewing when a stereoscopic display device is used on a horizontal plane. It is an object of the present invention to provide a stereoscopic display device that can be used.

  In order to solve the above problems, the stereoscopic display device according to the present invention has the following features.

  The stereoscopic display device according to the present invention is a stereoscopic display device including an image display unit that displays a 3D image or a 2D image, and is at least one slit that is long in the width direction relative to the image display surface of the image display unit. And an angle presentation image displayed on the image display unit is presented via the observation angle presentation barrier.

  In the stereoscopic display device according to the present invention, the observation angle presentation barrier changes a position or a pattern of the slit that transmits light according to the observation angle.

  In the stereoscopic display device according to the present invention, the display position of the angle presentation image is changed according to the observation angle.

  In the stereoscopic display device according to the present invention, the angle presentation image has a width in the depth direction, is displayed in a different color according to the position in the depth direction, and is displayed in a different color according to the observation angle. It is characterized by that.

  Further, in the stereoscopic display device according to the present invention, when the stereoscopic image is stereoscopically displayed, the angle presentation barrier is not displayed, and the angle presentation barrier transmits light in the entire range. To do.

  In the stereoscopic display device according to the present invention, the position of the angle presentation image area displayed on the observation angle presentation barrier and the image display unit is arranged outside the stereoscopic image attention area. .

  In the stereoscopic display device according to the present invention, the angle presentation image includes an image for presenting an observation angle in the width direction, in addition to an image for presenting an observation angle in the depth direction. The angle presentation image is arranged at a position where the image is shielded by the observation angle presentation means.

  The stereoscopic display device according to the present invention is characterized in that the observation angle presentation barrier is composed of liquid crystal.

  The stereoscopic display device according to the present invention includes an observation angle presentation barrier having at least one slit that is long in the width direction (lateral direction) relative to the image display surface of the image display unit, and the image display unit includes By presenting the displayed angle presentation image through the angle presentation barrier, it is possible to present the observation angle in the depth direction (vertical direction) with respect to the image display surface of the image display unit. On the other hand, the observer of the stereoscopic image can confirm the position at which the stereoscopic image can be accurately observed without distortion.

  Further, according to the stereoscopic display device according to the present invention, the observation angle presentation barrier is changed according to the stereoscopic image to be displayed by changing the light transmitting position (slit position) or the pattern according to the observation angle. Even when the observation angle changes, it is possible to present an observation angle corresponding to the stereoscopic image.

  In addition, according to the stereoscopic display device according to the present invention, the display position of the angle presentation image changes according to the observation angle, so that even when the transmission position of the angle presentation barrier cannot be changed, the viewing angle of the image is changed. If the transmission position of the angle presentation barrier can be changed, the appropriate observation position can be presented more strictly by combining with the display position of the angle presentation image. Is possible.

  Further, according to the stereoscopic display device according to the present invention, the angle presentation image has a width in the depth direction, is displayed in a different color according to the position in the depth direction, and a different color is presented according to the observation angle. As a result, it is possible to determine the angle at which the observer is viewing the image by presenting the relationship between the color and the angle in advance to the observer. It is possible to determine whether the observation position is reached.

  Further, according to the stereoscopic display device according to the present invention, when the stereoscopic image input to the stereoscopic display device is stereoscopically displayed, the angle presentation barrier is not displayed in the entire range without displaying the angle presentation image. When the stereoscopic image is transmitted, the angle presenting barrier becomes transmissive when the stereoscopic image is observed, thereby preventing the angle presenting barrier from interfering with the stereoscopic view.

  Further, according to the stereoscopic display device according to the present invention, the position of the angle presenting barrier and the angle presenting image area displayed on the image display unit are arranged outside the stereoscopic image attention area, thereby Even if the transmission state cannot be changed and the light is always blocked, since it is outside the attention area of the stereoscopic image, it can be prevented from obstructing stereoscopic vision.

  Further, according to the stereoscopic display device according to the present invention, the angle presentation image includes an image for presenting the observation angle in the width direction in addition to the image for presenting the observation angle in the depth direction. By arranging the angle presentation image so that the images are shielded together by the observation angle presentation means, through the same observation angle presentation means, in addition to the appropriate observation position in the depth direction, the appropriate observation position in the width direction Can be presented at the same time.

  Further, according to the stereoscopic display device according to the present invention, the observation angle presentation barrier can be freely switched between the light transmission state and the light blocking state by being configured by liquid crystal, so that the position of the slit can be made variable. The observation angle presentation barrier can be made transparent in the entire range.

  The best embodiment of the stereoscopic display device according to the present invention will be described with reference to the drawings.

  Here, in describing the embodiment, “3D” is a three-dimensional or three-dimensional image, “2D” is a two-dimensional term, and a three-dimensional image is a “3D image”. A normal two-dimensional image is a two-dimensional image. This is expressed as “2D image”.

  In addition, the same code | symbol is applied to the conventional structural part and the same structural part in each embodiment.

(First embodiment)
FIG. 1 is a diagram illustrating a configuration of a stereoscopic display device according to the first embodiment of the present invention.

  The stereoscopic display device 100 includes a backlight 101 that emits light for displaying an image from the back, and an image display unit 102 that includes a plurality of pixels of red (R), green (G), and blue (B). A parallax barrier 103 for separating a 3D image into images corresponding to the left and right eyes in order to display a 3D image, and an index for viewing the stereoscopic image from an appropriate position without distortion when the display device is placed on a horizontal plane. It consists of an observation angle presentation barrier 104 to be presented.

  First, a 3D image including a left eye image and a right eye image having parallax is input to the stereoscopic display device 100. FIG. 2 is an example of a 3D image at this time. The left image written L indicates the left eye image, and the right image written R indicates the right eye image. When such a 3D image is input, the stereoscopic display device 100 divides the image into vertical strips in each of the left eye image and the right eye image, and, as described with reference to FIG. To the left eye image and the right eye image are displayed in such an order that vertical strips are repeatedly arranged. For example, the stereoscopic display device 100 alternately displays a left eye image and a right eye image for each line with respect to a pixel line in the vertical direction of the display.

  FIG. 3 is a diagram illustrating the principle of stereoscopic viewing when a 3D image is displayed.

  In FIG. 3, the observation angle presentation barrier 104 is not drawn, and the description thereof will be described later. The left eye image and the right eye image are alternately displayed on the image display unit 102. The light emitted from each pixel is separated by the parallax barrier 103, and the left eye image reaches only the left eye and the right eye image reaches only the right eye, so that the displayed image can be viewed in three dimensions. .

  Note that the parallax barrier 103 at this time is configured by a slit that is vertically long with respect to the image display surface of the image display unit 102. Here, as the material of the parallax barrier 103, a film or the like may be used, or an element capable of turning on / off the slit by electrical control may be used. For example, liquid crystal is used here. The liquid crystal can be switched between a state of transmitting light and a state of blocking light by turning on / off the voltage. Therefore, the parallax barrier 103 is configured by liquid crystal, and when displaying a 3D image, the slit portion is shielded to separate the left and right eye images, and when displaying a normal 2D image, the slit portion is set to a transmissive state. This makes it possible to switch between 3D display and 2D display.

  In addition, the slits constituting the parallax barrier 103 may be diagonal strip-shaped slits. In this case, it is only necessary to replace the vertical lines described in the parallax barrier 103 of the vertical slits with diagonal lines corresponding to the diagonal strip-like slits. Similarly, the left and right images are displayed for each line, Separate images. Since the configuration of the parallax barrier 103 and the 3D image at this time is not related to the present invention, a detailed description thereof is omitted.

  An observer arranges the stereoscopic display device 100 so that the display surface is horizontal and performs stereoscopic viewing. Further, the stereoscopic display device 100 performs correction as shown in Patent Document 1 on the input 3D image, and rearranges and displays the corrected images as described above. In this way, the observer can observe a natural stereoscopic image.

  4 and 5 are diagrams showing an example of the above-described correction.

  FIG. 4 is a diagram showing an image obtained by photographing a cube placed on a square table at an angle of about 45 degrees obliquely from above with two cameras having a camera interval of 65 mm close to the distance between both eyes. is there.

  The angle of the camera is an angle connecting the center of the subject, that is, the center of the table and the center of the camera. Let L denote an image obtained by cutting out the table area from the photographed left eye image, and R denote an image obtained by cutting out the table area from the right eye image. The size of these L and R images is smaller as they are arranged at the back. The above correction is performed on each of these images.

  FIG. 5 is a diagram illustrating correction of the L image. In FIG. 5, the left side shows before correction and the right side shows after correction, so that the points P1, P2, P3, and P4 indicating the corners of the table surface serving as the reference surface have the same square shape as the original shape of the table. Corrections are made so as to come to P1 ′, P2 ′, P3 ′, and P4 ′ in the figure. Thereby, it correct | amends so that a feeling of depth (perspective) may be lost. This correction is performed in the same manner for the right-eye image, and the perspective is eliminated, and a 3D image composed of left and right eye images as shown in FIG. 2 is created. When this image is displayed on the stereoscopic display device 100 placed on a horizontal plane and observed from the same 45 degree angle as the shooting position of the camera, a natural stereoscopic image is observed.

  At this time, if the image is observed from an angle different from the angle at which the image was taken, the stereoscopic image appears to be distorted with respect to the original shape as the angle deviation increases. In order to prevent this, an angle for appropriately observing the image is presented by the observation angle presentation barrier 104.

  FIG. 6 is a view of the stereoscopic display device 100 as viewed from the side, and shows a method for presenting an observation angle by the observation angle presentation barrier 104. The observation angle presentation barrier 104 is a barrier in which at least one region is formed of a slit that is horizontally long with respect to the image display surface of the image display unit 102. Here, as the material of the observation angle presentation barrier 104, a film or the like may be used similarly to the parallax barrier 103, or an element capable of turning on / off the slit by electrical control may be used. Here, liquid crystal is used. By doing so, it is possible to switch between the transmissive state and the light-shielded state, similarly to the parallax barrier 103.

  In the following, a description will be given by taking as an example a case where the region where the slit on the observation angle presentation barrier 104 exists is present at the left and right ends thereof toward the display surface of the stereoscopic display device as shown in FIG.

  The image display unit 102 displays a line having a predetermined length in the width direction as an angle presentation image at a position corresponding to a portion where the slit of the observation angle presentation barrier 104 is present. In FIG. 1, the direction of the arrow indicated by A is the width direction, and the direction indicated by B is the depth direction. Here, for example, a line having a predetermined color and luminance is displayed as the angle presentation image (hereinafter, this line is referred to as an angle presentation line). The color of the angle presentation line may be any number, but is preferably a highly visible color. Here, the size of the angle presentation line displayed on the stereoscopic display device 100 is, for example, m pixels in the depth direction (vertical direction) and n pixels in the width direction (horizontal direction). Is an integer).

  Here, m is 1, and the value of n is such that the length in the width direction of the angle presentation line displayed on the stereoscopic display device 100 is equal to or less than the length in the width direction of the slit of the observation angle presentation barrier 104. Shall be restricted.

  In FIG. 6, the hatched portion on the image display unit 102 is the aforementioned angle presentation line. An angle α in the figure indicates an observation angle, and the transmission part of the observation angle presentation barrier 104 changes according to the observation angle. Here, α is 45 degrees. The range in which the observer can see the angle presentation line is limited to the range sandwiched between the two dotted lines shown in FIG. 6, and the angle written by the two solid lines corresponding to the observation angle α is the most. Visible well and maximizes brightness. Therefore, by bringing the viewpoint to the position where the angle presentation line can be best seen, it is possible to view the displayed 3D image most naturally and without distortion.

  When observing a 3D image created by changing the observation angle, the observation angle presentation barrier 104 can change the observation angle by changing the position of the transmission part. FIG. 7 shows a case where the observation angle is shallower than that in FIG. Even if the angle at the time of shooting is changed according to the image, by changing the transmission position, an appropriate observation angle can be presented, so that natural stereoscopic vision is always possible.

  The vertical size m of the angle presentation line and the vertical width of the slit opening in the observation angle presentation barrier 104 can take various values, but the narrower the visibility, the more accurate the observation. An angle can be presented.

  In addition, when the angle presentation line is displayed in a form superimposed on the stereoscopic image, the stereoscopic image may appear unnatural when viewed stereoscopically. However, since the observation angle presentation barrier 104 is configured by liquid crystal, the 3D image is displayed. The viewing angle is presented before display, and no line is displayed during 3D image display. The slit of the viewing angle presentation barrier 104 is in a transparent state in all parts, so that the viewing angle presentation barrier and the angle presentation line are three-dimensional. It won't get in the way of your eyes. Alternatively, after the 3D image is displayed, the observation angle is superimposed and displayed on the stereoscopic image only for a certain period of time, for example, 10 seconds, or until the observer inputs an operation for interrupting the presentation of the observation angle from the outside. The line display may be turned off, and the observation angle presentation barrier 104 may be transmitted.

  Here, the observer may input the observation angle for each 3D image. For example, the stereoscopic display device 100 may be provided with mechanical input means for inputting the observation angle to the image display unit 102, and the position of the slit opening may be changed according to the input information to present the observation angle. Alternatively, the stereoscopic display device 100 includes a button for inputting information, and the observation angle currently set by the button is displayed on the image display unit 102 by the observation angle display unit (processing unit by software) provided in the image display unit. In this case, the angle may be changed to a desired observation angle by using a button, or the observation angle may be input from the PC side by connecting to an external device such as a PC.

  In addition, since 3D images usually have header information, the viewing angle is held in the header information in advance when the image is created, and when a 3D image is displayed, it is automatically observed on the stereoscopic display device side based on that information. The position of the opening of the observation angle presentation barrier 104 may be controlled according to the angle to display the observation angle.

  Hereinafter, an image generation device 150 that is an external device that generates a 3D image with header information, a 3D image that receives data from the image generation device, reproduces the 3D image, and supplies 3D image data to the image display unit The configuration and operation of the playback unit will be briefly described.

  FIG. 8 is a block diagram of an image generation apparatus that incorporates header information into an image and generates a 3D image.

  FIG. 9 is a block diagram illustrating an example of an image reproducing unit that reproduces a 3D image when incorporated in the stereoscopic display device.

  First, the operation of the image generation apparatus 150 will be described with reference to FIG.

  The control unit 151 outputs 3D information related to the observation angle, the image arrangement position, and the like, and supplies this 3D information to the image integration unit 152 and the multiplexing unit 154 described later. The image integration unit 152 integrates the left eye image and the right eye image corresponding to the left and right eyes based on the arrangement position information from the control unit, and generates image data. The generated image data is encoded by the encoding means 153, and the encoded data and 3D information from the control means 151 are multiplexed by the multiplexing means 154.

  Next, the operation of the image reproduction unit 155 on the stereoscopic display device 101 side will be described with reference to FIG.

  Multiplexed stereoscopic image data is received from the image generation device 150 via a communication unit or other recording medium, and the demultiplexing unit 156 extracts encoded data and 3D information. The encoded data is decoded by the decoding unit 157 and the image data is reproduced.

  On the other hand, for the extracted 3D information, the 3D information analysis unit 158 calculates information such as an image position and an observation angle. Using the calculated image position information, the image conversion means 159 creates 3D dimensional video data from the image data. Then, the header information such as the extracted observation angle data and the 3D video data are supplied to the image display unit 102.

  As described above, the slit opening can be automatically determined in accordance with the observation angle included in the 3D information.

  In FIG. 1, for ease of understanding, the size relationship of each component is exaggerated and the size of each component is different from the actual size. In addition, here, the parallax barrier 103 is disposed on the front side of the image display unit 102, but may be configured to be disposed on the back side of the image display unit 102 as illustrated in FIG. Further, the observation angle presentation barrier 104 is here also on the front side of the image display unit 102, but may be arranged on the back side based on the same principle as in FIG. Here, the observation angle presentation barriers 104 are arranged on both the left and right sides, but only one side may be provided. However, being at both ends has an effect that it is possible to grasp whether the observer is observing horizontally with respect to the display screen by being at both sides.

  Furthermore, two parallax barriers 103 may be prepared and arranged on both surfaces of the image display unit 102.

  Furthermore, here, the value of n is limited so that the length in the width direction of the angle presentation line is equal to or less than the length in the width direction of the slit of the observation angle presentation barrier 104. Even if it is more than that, it is possible to present the angle by judging only by the slit portion.

  Here, although the stereoscopic display device 100 has a shape that is long in the width direction, a display device that has a short width direction and a long depth direction may be used.

(Second Embodiment)
FIG. 10 is a diagram showing a configuration of a stereoscopic display device according to the second embodiment of the present invention.

  The stereoscopic display device 200 includes a backlight 101 that emits light for displaying an image from the back, and an image display unit 102 that includes a plurality of pixels of red (R), green (G), and blue (B). A parallax barrier 103 for separating a 3D image into images corresponding to the left and right eyes in order to display a 3D image, and an index for viewing the stereoscopic image from an appropriate position without distortion when the display device is placed on a horizontal plane. It consists of an observation angle presentation barrier 201 to be presented.

  When a 3D image composed of a left-eye image and a right-eye image having parallax is input, the stereoscopic display device 200 displays each image with respect to a pixel line in the vertical direction of the display as shown in FIG. The left eye image and the right eye image are alternately displayed for each line. The light emitted from each pixel is separated by the parallax barrier 103 configured by a slit that is a vertically long strip with respect to the image display surface of the image display unit 102, the left eye image is only for the left eye, and the right eye image is By reaching only the right eye, the displayed image can be viewed three-dimensionally.

  Here, the parallax barrier 103 is made of liquid crystal. The liquid crystal can be switched between a state of transmitting light and a state of blocking light by turning on / off the voltage. Therefore, the parallax barrier 103 is configured by liquid crystal, and when displaying a 3D image, the slit portion is shielded to separate the left and right eye images, and when displaying a normal 2D image, the slit portion is set to a transmissive state. This makes it possible to switch between 3D display and 2D display.

  An observer arranges the stereoscopic display device 200 so that the display surface thereof is horizontal with respect to the ground and performs stereoscopic viewing. The left and right eye images corresponding to the left and right eye viewpoints are corrected for the left eye image and the right eye image shown in FIGS. 4 and 5, respectively. Create a stereo image consisting of When this image is displayed by the stereoscopic display device 200 placed on a horizontal plane and observed from the same angle at the photographing position of the camera, a natural stereoscopic image is observed.

  At this time, if the image is observed from an angle different from the angle at which the image was taken, the stereoscopic image appears to be distorted with respect to the original shape as the angle deviation increases. In order to prevent this, an angle for appropriately observing an image is presented using the observation angle presentation barrier 201.

  FIG. 11 is an overview of the stereoscopic display device 200 as viewed from the side, and shows a method of presenting an observation angle by the observation angle presentation barrier 201. The observation angle presentation barrier 201 is a barrier in which at least one region is formed by a slit that is a horizontally long strip shape with respect to the image display surface of the image display unit 102, and is arranged at the left and right ends of the screen. ing. The light shielding part is formed by a light shielding film made of chromium or the like.

  The image display unit 102 displays an angle presentation line having a predetermined length, color, and luminance in the width direction as an angle presentation image at a position corresponding to a portion where the slit of the observation angle presentation barrier 201 is present. Any color may be used, but a color with high visibility is preferable. When the size of the angle presentation line is m pixels in the depth direction and n pixels in the width direction (m and n can take values are integers of 1 or more), the size of the angle presentation line is equal to or less than the length in the width direction of the slit of the observation angle presentation barrier 201. Thus, the value of n is limited.

  Here, m is 1 and n is 10, which is shorter than the length in the width direction of the slit of the viewing barrier 201 at the observation angle. It is assumed that the color of the angle presentation line is red and the surrounding area is not displayed (black is displayed).

  In FIG. 11, since the position of the light transmission portion sandwiched between the light shielding portions in the observation angle presentation barrier 201 is unchanged, the image display unit 102 changes the display position of the angle presentation line according to the observation angle. It is assumed that an angle presentation line in which a hatched portion on the image display unit 102 is displayed. An angle α in FIG. 11 indicates an observation angle. Here, α is 45 degrees. At this time, the range in which the observer can see the line is limited to the range indicated by the dotted line in FIG.

  In FIG. 11, at the angle written by two solid lines corresponding to the observation angle α, the area of the angle presentation line that can be visually recognized best and seen from the slit is maximized. Therefore, by shifting the viewpoint to a position where the line can be seen even a little, distortion can be reduced when viewing the stereoscopic image, and the viewpoint is taken by bringing the viewpoint to the position where the line is best viewed. Since the observation angle is the same as the angle, it is possible to see a more natural and distortion-free stereoscopic image.

  When the observation angle changes for each image, the image display unit can change the presented angle by switching the display portion of the line. FIG. 12 shows a case where the observation angle is shallower than that in FIG. The observation angle α at this time is 30 degrees. By changing the display part of the line in the upward direction of the display (left direction in FIG. 12), the observation angle becomes a shallow direction. Although not shown in FIG. 12, if the observation angle is larger, the display position of FIG. 11 can be changed by changing the display position of the line downward from the display position of FIG. Is possible. In this way, even when the angle at the time of shooting is changed according to the image, by changing the display position of the line, an appropriate observation angle can be presented, so that natural stereoscopic vision is always possible.

  Further, although the angle presentation line to be displayed here is a single red color, another color may be displayed in the vicinity.

  FIG. 13 is a diagram illustrating a case where display is performed in multiple colors.

  The observation angle to be presented is 30 degrees as in FIG. In FIG. 13, assuming that the hatched portion on the image display unit 102 is red and the surrounding black portion is displayed in blue, the observation is performed from the observation position indicated by A in the figure. The person can see only the blue line from between the slits of the observation angle presentation barrier 201. By presenting to the observer beforehand that the line that is visible in red is the observation angle, it is possible to determine whether or not the angle that the observer is viewing is an appropriate angle.

  Further, when viewed from the angle shown in FIG. 13B, the red and blue lines can be seen simultaneously. By moving the viewpoint position so that the angle is further shallower than B, and moving the viewpoint to a position that is seen purely red, an appropriate position can be determined more easily than in the case shown in FIG. In another position away from the slit, for example, the portion shown in FIG. 13 (1), red is displayed as the correct color when the slit is viewed at the correct angle, and the color seen from between this color and the slit is displayed. By making the comparison possible, it becomes possible to search the observation angle position more accurately.

  Here, an example is shown in which the angle presentation line is displayed in another single color so as to sandwich a certain single color, but the sandwiched portion may be a different color. For example, it is assumed that the shaded portion on the image display unit 102 in FIG. 13 is displayed in red, the near side viewed from the viewpoint position in blue and the far side in green are displayed in green. Then, when looking at an angle shallower than the observation angle, the far side green can be seen, and when looking at an angle deeper than the observation angle, the near side blue can be seen. It can be seen whether the viewpoint position should be corrected in the direction of.

  In addition to the above, if, for example, the shaded portion is black and the surrounding black portion is displayed in white, the light is invisible when it comes to an appropriate observation angle position, and the light is visible when it is incorrect. It will be. At this time, if the light is slightly deviated from the observation angle, the light can be seen, so that the observation position can be determined more accurately.

  In FIG. 10, the size relationship of each component is exaggerated for easy understanding, and the size of each component is different from the actual size.

(Third embodiment)
FIG. 14 is a diagram showing a configuration of a stereoscopic display device according to the third embodiment of the present invention.

  The stereoscopic display device 300 includes a backlight 101 that irradiates light for displaying an image from the back and a plurality of pixels composed of red (R), green (G), and blue (B), and an observation angle of the stereoscopic image An image display unit 302 provided with an angle presentation region 301 for presenting, a micropole 304 for changing the polarization direction of light with respect to the left and right eye images in order to display a 3D image in three dimensions, and a horizontal plane And an observation angle presentation barrier 303 that presents an index for viewing the stereoscopic image from an appropriate position without distortion when the display device is placed on the display device.

  When a 3D image composed of a left-eye image and a right-eye image having parallax is input, the stereoscopic display device 300 displays each image on the hatched portion of the image display unit 302, as shown in FIG. A left-eye image and a right-eye image are alternately displayed for each line with respect to a pixel line extending in the left-right direction of the display. The polarization direction of the light emitted from each pixel is changed by the micropole 304 between the left eye image and the right eye image. An observer uses a glass with a polarization filter that uses the same filter as the polarization direction of the left eye image for the left eye and the same filter as the change direction of the right eye image for the right eye. By viewing 300, the left eye image reaches only the left eye, and the right eye image reaches only the right eye, so that the displayed image can be viewed three-dimensionally.

  Note that the micropole 304 is a filter composed of fine polarizing elements, and is configured by arranging polarizing elements that are orthogonal to each other in the horizontal direction.

  An observer arranges the stereoscopic display device 300 so that the display surface thereof is horizontal with respect to the ground and performs stereoscopic viewing. A correction similar to the correction described in FIGS. 4 and 5 is performed on each of the left eye image and the right eye image corresponding to the viewpoints of the left eye and the right eye, and the perspective is eliminated. Create an image. When this image is displayed on the stereoscopic display device 300 placed on a horizontal plane and observed from the same angle as the shooting position of the camera, a natural stereoscopic image is observed.

  At this time, if the image is observed from an angle different from the angle at which the image was taken, the stereoscopic image appears to be distorted with respect to the original shape as the angle deviation increases. In order to prevent this, an appropriate angle for observing the image is presented using the observation angle presentation barrier 303 and the angle presentation area 301 on the image display unit 302. The angle presentation area 301 and the observation angle presentation barrier 303 are arranged outside the stereoscopic image attention area, which is a part for displaying a 3D image, so as not to hinder stereoscopic vision. The angle presentation area 301 is an area prepared for displaying a line for presenting an observation angle.

  A stereoscopic image or the like is displayed only in the shaded area of the image display unit 301. For example, when the resolution of the image display unit 302 is SXGA (1280 × 1024) and the resolution of the hatched portion is 1180 × 1024, the angle presentation area is 50 × 1024 at the left and right ends located outside the hatched portion. Is provided.

  The observation angle presentation barrier 303 is a barrier in which at least one area is formed by a slit that is horizontally long with respect to the image display surface of the image presentation area 301, and is arranged at the left and right ends of the screen. ing. The light shielding part is formed of a light shielding material and is widely formed in the vertical direction.

  An angle presentation area 301 that is a part of the image display unit 302 displays an angle presentation line according to an observation angle. The size of the angle presentation line is the same as in the first and second embodiments. Here, the pixel m in the depth direction is 2 and the pixel n in the width direction is 40. If the observation angle is 45 degrees, the observation angle can be presented by displaying the angle presentation line as in FIG. 11 of the second embodiment. By providing a separate angle presentation area outside the stereoscopic image attention area, which is a 3D image display area, an image displayed with an angle presentation line is an obstacle when displaying a 3D image or when performing 2D display. In addition, since it is possible to display a line indicating an observation angle even during 3D image display, it is possible to perform stereoscopic viewing while always checking the angle.

  In addition, it is not necessary to configure the light shielding portion of the observation angle presentation barrier 303 with a member that switches between transmission and light shielding such as liquid crystal, and the configuration becomes easy.

  When the observation angle changes for each image, various angles can be handled by changing the position of the angle presentation line displayed in the angle presentation area 301 as in FIG.

  In addition, here, the slit portions of the angle presentation region 301 and the observation angle presentation barrier 303 are provided at the left and right positions, but they can be arranged at various positions without being limited to the left and right. An example at that time is shown in FIG. 15A shows the case where the stereoscopic display device 300 is arranged at the top, FIG. 15B shows the case where it is arranged at the bottom, and FIGS. 15C and 11D show the case where the display length of the line for presenting the observation angle is changed. is there.

  However, when the slit portion of the observation angle presentation barrier 303 is disposed at a place other than the central portion with respect to the vertical direction of the display screen, it is necessary to display the angle presentation line at a position where the observation angle is corrected. Since the observation angle is set in accordance with the center of the subject, as shown in FIG. 16, when there is a slit portion of the observation angle presentation barrier 303 in the lower part, the viewpoint position that becomes the observation angle α when the center is viewed When the slit portion is viewed from the angle β, an angle β is formed. Therefore, it is necessary to make the angle presentation line visible when viewed at the angle β.

  As the observation angle β, a distance x2 from the viewpoint position to the center part, which is the observation angle α in the center part, a distance x1 from the center part to the slit part of the observation angle presentation barrier 303, and the height y of the viewpoint position are used. Thus, the angle presentation line is displayed in the angle presentation area 301 based on the angle β. Regarding the values of x2 and y, there is a method in which the image creator and the presenting side decide values beforehand. Alternatively, the observer may input and set each input.

  In FIG. 14, the size relationship of each component is exaggerated for easy understanding, and the size of each component is different from the actual size. Here, the micropole 304 is disposed behind the observation angle presentation barrier 303, but this order may be reversed.

  In addition to the polarizing filter method that realizes stereoscopic viewing by changing the polarization direction according to the left and right images, the stereoscopic viewing method is an integral type that is multi-view and capable of natural stereoscopic viewing with the naked eye. It may be a photography system or an anaglyph system in which the left and right eyes use red and blue to separate the colors used for stereoscopic viewing. The image to be presented at each time is switched between the left eye and the right eye, and the liquid crystal shutter It may be a time-sharing method for viewing with dedicated glasses equipped with.

  Further, the width of the observation angle presentation barrier 303 shown in FIG. 15 and the display range of a line that is an angle presentation image of the angle presentation area 301 may be various, and are not limited to those shown here.

  Furthermore, the resolution of the stereoscopic display device 300 is not limited to SXGA, but may be various, such as UXGA (1600 × 1200) and VGA (640 × 480). Similarly, the resolution and range of the angle presentation area 301 are not limited to 50 × 1024. The hatched portion resolution of the image display unit 302 may be a predetermined resolution such as SXGA, the image presentation area 301 may be provided outside the image display area 301 at a constant resolution, and the image presentation area 301 may be used only for stereoscopic viewing. .

(Fourth embodiment)
FIG. 17 is a diagram showing a configuration of a stereoscopic display device according to the fourth embodiment of the present invention.

  The stereoscopic display device 400 includes a backlight 101 that irradiates light for displaying an image from the back, and a plurality of pixels including red (R), green (G), and blue (B), and an observation angle of the stereoscopic image The image display unit 402 having an angle presentation area 401 for presenting the image and the parallax barrier 403 for separating the image corresponding to the left and right eyes in order to display a 3D image stereoscopically, and the stereoscopic display device on a horizontal plane The observation angle presenting barrier 404 which presents an appropriate vertical observation position and presents an appropriate position where the stereoscopic image can be observed without distortion. And a parallax optical unit 405.

  When a 3D image composed of a left-eye image and a right-eye image having parallax is input, the stereoscopic display device 400 displays each image on the hatched portion of the image display unit 402 as shown in FIG. The left eye image and the right eye image are alternately displayed for each line with respect to the vertical pixel line. The light emitted from each pixel is separated by the parallax barrier 403 using the light from the backlight 101 as a light source. The left eye image reaches only the right eye, and the right eye image reaches only the right eye. It becomes possible to see in three dimensions.

  Note that the parallax barrier 403 is made of liquid crystal. The liquid crystal can be switched between a state of transmitting light and a state of blocking light by turning on / off the voltage. Therefore, the parallax barrier is made of liquid crystal, and when displaying a 3D image, the slit part is shielded to separate the left and right eye images, and when displaying a normal 2D image, the slit part is set to a transmissive state. Thus, switching between 3D display and 2D display can be performed.

  An observer arranges the stereoscopic display device 400 so that the display surface thereof is horizontal with respect to the ground and performs stereoscopic viewing. Similar to the first embodiment, the correction shown in FIGS. 4 and 5 is performed on each of the left eye image and the right eye image corresponding to the viewpoints of the left eye and the right eye, respectively, and the perspective is eliminated. Create a 3D image consisting of images. When this image is displayed on the stereoscopic display device 400 placed on a horizontal plane and observed at the same angle from the shooting position of the camera, a natural stereoscopic image is observed.

  In the parallax barrier method shown here, as shown in FIG. 3 of the first embodiment, there is an appropriate observation position for stereoscopic viewing in the left-right direction of the stereoscopic display device 400. If it deviates from this range, images corresponding to the left and right eyes cannot be seen, and stereoscopic viewing becomes impossible.

  For example, when viewing from a position as shown in FIG. 18, an image for the left eye is seen by the right eye and an image for the right eye is seen by the left eye. In the image display unit 402 in the figure, L indicates an image for the left eye and R indicates an image for the right eye. In order to avoid such a problem, an appropriate observation position in the left-right direction is presented by the parallax optical unit 405.

  A method for presenting the observation position in the left-right direction is shown in FIG. FIG. 19 is a cross-sectional view of the stereoscopic display device 400 placed in the direction in which the viewer is present, that is, the front side of the stereoscopic display device 400 placed on the horizontal plane. The positions for displaying images on the observation angle presentation barrier 404 of the parallax optical unit 405 and the angle presentation area 401 provided in the image display unit 402 are matched well.

  Assuming that the white portion on the angle presentation area 401 in FIG. 19 is a white portion, the display position of this white portion and the light shielding provided in the observation angle presentation barrier 404 extending in the vertical direction of the screen. When the viewpoint is adjusted to an appropriate observation position in the left-right direction of the display screen as shown in the figure, the white portion is shielded by the observation angle presentation barrier 404 so that it cannot be seen. If it is slightly deviated from this range, the light from the angle presentation area 401 can be seen by either the left or right eye, and it can be determined whether or not it is in an appropriate position.

  Further, since the stereoscopic image is distorted when the observation angle with respect to the vertical direction of the stereoscopic display device 400 placed on a horizontal plane is different from that at the time of photographing by the camera, the method shown in FIGS. 11 to 13 in the third embodiment is used. The observation angle is presented using the observation angle presentation barrier 404.

  However, at this time, it is necessary to present the observation angle in the vertical direction at the same time as the observation position in the width direction using the observation angle presentation barrier 404, so that the angle presentation image 401 has a line as an angle presentation image. Instead, it is displayed on a dotted line at a position in the width direction that cannot be seen when it comes to an appropriate left and right position shown in FIG. 19, and at a position that presents the observation angle in the vertical direction. The angle presentation image at this time is shown in FIG. In the angle presentation area 401 in FIG. 20A, the square portion indicated by the symbol A is a portion displayed in white, which is an angle presentation image. The other parts are turned off.

  The display position in the width direction of the angle presentation image is the position shown in FIG. 19, and the position in the depth direction varies depending on the observation angle and the position of the observation angle presentation barrier 404. The image in FIG. 20A is displayed when the angle with respect to the vertical direction of the screen is correct and the left and right observation positions are shifted, and when the vertical angle is incorrect or the observation position in the width direction is correct. The image disappears.

  Thereby, the observer first moves to a position where the angle presentation image shown in FIG. 20 can be seen through the observation angle presentation barrier 404. At this time, it means that there is an observation angle in the vertical direction of the screen, so align it in the width direction while maintaining the observation angle, and when it comes to a position where the image can not be seen, the appropriate observation angle and observation position It is possible to determine that the display screen is being viewed.

  An example of another angle presentation image is shown in FIG. The figure surrounded by a circle is an enlarged view of a part of the angle presentation image. The part that has not been enlarged is also in the same display status as this part.

  The portion indicated by the numbers 1 to 3 is used for presentation of the observation angle in the vertical direction, and the portion indicated by the number 4 is presentation of the observation position in the width direction corresponding to the portion indicated by the symbol A in FIG. It is a part used for. Here, 1 and 3 are displayed in red, 2 is displayed in black, and 4 is displayed in white. All other angle presentation areas 401 are black. The white part of No. 4 becomes invisible when the position in the width direction reaches an appropriate position by the light shielding part of the observation angle presentation barrier 404. At this time, if the observation angle in the vertical direction is correct, the red portions of No. 1 and No. 3 are similarly blocked by the observation angle presentation barrier 404 by the observation angle presentation barrier 404, and only the portion of No. 2 can be seen. It can be seen that the image is not visible and is in the correct position.

  If the observation angle is not correct, it is possible to determine that the observation angle in the vertical direction is incorrect by seeing red light of number 1 or 3. In this way, by displaying different colors in the numbers 1 and 3 and the number 4, it is possible to determine which observation position in the width direction or the depth direction is incorrect.

  Here, an example is shown in which the observation position in the width direction is first adjusted and then the vertical direction is adjusted, but conversely, the observation position may be adjusted in the order of the depth direction and the width direction. In addition, although it is not possible to immediately determine which of the width direction and the depth direction is wrong, even if the numbers 1, 3, and 4 are all displayed in the same color instead of different colors, a position where light cannot be seen by trial and error is searched. Thus, the observation position can be specified in the same manner.

  In FIG. 17 to FIG. 20, the size relationship of each component is exaggerated for easy understanding, and the size of each component is different from the actual size.

  Further, the display range of the image by the line of the angle presentation area 401 shown in FIG. 20 may be various, and is not limited to the one shown here. The color of the displayed image is not limited to white and may be other colors.

(Fifth embodiment)
FIG. 21 is a diagram showing a configuration of a stereoscopic display device according to the fifth embodiment of the present invention.

  The stereoscopic display device 500 includes a backlight 101 that irradiates light for displaying an image from the back, and a plurality of pixels including red (R), green (G), and blue (B), and displays an image. The display unit 102 includes a lenticular lens 501 for separating a 3D image into images corresponding to the left and right eyes in order to display the 3D image stereoscopically. Further, a cylindrical angle presentation index 502 (shown in FIG. 22) for presenting the observation angle is used here.

  When a 3D image composed of a left-eye image and a right-eye image having parallax is input, the stereoscopic display device 500 displays each image on the image display unit 102 with respect to a pixel line in the vertical direction of the display device. The left eye image and the right eye image are alternately displayed for each line. Light emitted from each pixel is separated by the lenticular lens 501, and the left eye image reaches only the right eye and the right eye image reaches only the right eye, so that the displayed image can be viewed in three dimensions. Become.

  The lenticular lens 501 has directivity, can change the position where the line of sight reaches, and is aligned with each pixel of the image display unit 102 so that light of only the left eye image and the right eye image enters the left and right eyes respectively. Is done.

  An observer arranges the stereoscopic display device 500 so that the display surface is horizontal with respect to the ground, and performs stereoscopic viewing. By performing the correction shown in FIGS. 4 and 5 of the first embodiment, the 3D image at this time is stereoscopically viewed at an appropriate observation angle from the camera position assumed as the viewpoint position in advance. A stereoscopic image can be visually recognized. Here, the observation angle is 45 degrees.

  At this time, if the image is observed from an angle different from the angle at which the image was taken, the stereoscopic image appears to be distorted with respect to the original shape as the angle deviation increases. In order to prevent this, the correct viewing angle is presented using the angle presentation index 502. The height of the angle presentation index 502 is 10 cm.

  22 is a view of the stereoscopic display device 500 as viewed from the side, and FIG. 23 is a view as viewed from directly above.

  Before displaying the stereoscopic image, two index lines are displayed on the image display unit 102. 22 and 23, a thick line indicated by black on the image display unit 102 is an index line. An angle presentation index 502 is placed in accordance with the line on the near side as viewed from the observation position. The index line is displayed at a location that coincides with the upper portion of the angle presentation index 502 when the appropriate observation angle is reached as shown in FIG.

  This makes it possible to present the observation angle easily without using a special mechanism.

  In FIG. 21, the size relationship of each component is exaggerated for easy understanding, and the size of each component is different from the actual size.

  In addition to 45 degrees, there are various cases such as 30 degrees, 40 degrees, and 50 degrees depending on the stereoscopic image. The height of the angle presentation index 502 is not limited to 10 cm shown here, and may be various lengths such as 15 cm and 5 cm according to the size of the display device. Here, the angle presentation index is placed on the line. However, the angle presentation index may be shifted laterally, and in addition to the cylindrical object, a pole or a scale serving as an index may be used for the frame of the display device.

  In addition, although a liquid crystal display device is used here, an observation angle may be presented by combining a display device of a system such as PDP or CRT with an observation angle presentation barrier.

  In the embodiment of the present invention, the stereoscopic display device is on a horizontal plane. However, for example, when the display surface is parallel to the wall surface and hung on a place located below the viewpoint, it is assumed that there is an object perpendicular to the wall surface. It can also be used when viewing a stereoscopic image created in an oblique manner, and can also be applied when assuming a plane slightly inclined from the horizontal plane, and a portable display terminal may be assumed. However, it is not necessarily limited to the horizontal plane.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Embodiments are also included in the technical scope of the present invention.

1 is a block diagram illustrating a configuration of a stereoscopic display device according to a first embodiment of the present invention. It is a figure which shows an example of stereo image data. It is a figure which shows the principle of the stereoscopic vision in a parallax barrier system. It is a figure which shows the image which image | photographed the object of the horizontal surface from the diagonal direction. It is a figure which shows the correction method of the image which image | photographed the object of the horizontal surface from the diagonal direction. It is a figure which shows an example regarding the presentation method of an observation angle. It is a figure which shows an example regarding the presentation method of an observation angle. 1 is a block diagram of an image generation device that incorporates header information into an image and generates a 3D image. FIG. It is a block diagram which shows the example of the image reproduction part which reproduces | regenerates 3D image at the time of incorporating in this stereoscopic display device. It is a block diagram which shows the structure of the three-dimensional display apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example regarding the presentation method of an observation angle. It is a figure which shows an example regarding the presentation method of an observation angle. It is a figure which shows an example regarding the presentation method of an observation angle. It is a block diagram which shows the structure of the three-dimensional display apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows the example regarding the arrangement position of an observation angle presentation barrier. It is a figure which shows the example of the angle correction | amendment by the position of an observation angle presentation barrier. It is a block diagram which shows the structure of the three-dimensional display apparatus which concerns on the 4th Embodiment of this invention. It is a figure explaining the malfunction of the stereoscopic vision in a parallax barrier system. It is a figure which shows the presentation method of the observation position in a parallax barrier system. It is a figure which shows an example of the angle presentation image for observation position and observation angle presentation. It is a block diagram which shows the structure of the three-dimensional display apparatus which concerns on the 5th Embodiment of this invention. It is a figure which shows an example regarding the presentation method of the observation angle using an angle presentation parameter | index. It is the figure which looked at the display apparatus at the time of observation angle presentation from right above. It is a conceptual diagram for demonstrating a time division system. It is a conceptual diagram for demonstrating a parallax barrier system. It is a figure which shows another structural example of a parallax barrier system.

Explanation of symbols

100, 200, 300, 400, 500 Stereoscopic display device 101 Backlight 102, 302, 402 Image display unit 103, 403 Parallax barrier 104, 201, 303, 404 Viewing angle presentation barrier 150 3D image generation device 151 Control means 152 Image integration Means 153 Encoding means 154 Multiplexing means 155 3D image reproduction section 156 Demultiplexing means 157 Decoding means 158 3D information analysis means 159 Image conversion means 301, 401 Angle presentation area 304 Micropole 405 Parallax optical section 501 Lenticular lens 502 Angle Presentation index 600 Image display panel 601 Parallax barrier 602 Left eye 603 Right eye

Claims (8)

A stereoscopic display device including an image display unit that displays a 3D image or a 2D image,
An observation angle presentation barrier having at least one slit long in the width direction relative to the image display surface of the image display unit;
A stereoscopic display device that presents an observation angle in a depth direction with respect to an image display surface of the image display unit by presenting an angle presentation image displayed on the image display unit through the observation angle presentation barrier. .   The stereoscopic display device according to claim 1, wherein the observation angle presentation barrier changes a position or a pattern of the slit that transmits light according to the observation angle.   The stereoscopic display device according to claim 1, wherein the display position of the angle presentation image changes according to the observation angle.   The angle presentation image has a width in the depth direction, is displayed in a different color according to a position in the depth direction, and a different color is presented according to an observation angle. The stereoscopic display device according to claim 3.   5. The display device according to claim 1, wherein when the stereoscopic image is stereoscopically displayed, the angle presentation image is not displayed, and the observation angle presentation barrier transmits light in the entire region range. The stereoscopic display device according to claim 1.   5. The position of the angle presentation image area displayed on the observation angle presentation barrier and the image display unit is arranged outside the stereoscopic image attention area. 6. The stereoscopic display device according to item.   The angle presentation image includes an image for presenting an observation angle in the width direction in addition to an image for presenting an observation angle in the depth direction, and the images are shielded together by the observation angle presentation means in the observation angle direction. The three-dimensional display device according to claim 1, wherein the angle presentation image is arranged at a position where the image is displayed. The stereoscopic display device according to any one of claims 1 to 7, wherein the observation angle presentation barrier is configured by liquid crystal.

Images