JP3710934B2 - 3D image display device without glasses - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a 3D image display apparatus without glasses that can observe 3D images without using special glasses.
[0002]
[Prior art]
FIG. 4 is an explanatory diagram showing the principle of conventional multi-view 3D image display. On the image display surface 50, eight pixels a to h are formed corresponding to one vertical stripe-shaped kamaboko lens portion 51 a in the lenticular lens 51. Images taken from multiple directions are displayed on each pixel, for example, a picture taken by the camera 15a of FIG. 5 is displayed on the pixel a, a picture taken by the camera 15b is displayed on the pixel b, and so on. Accordingly, it is possible to obtain a sense of moving around the imaged object by moving the viewpoint from side to side. The cameras 15a to 15h are arranged at intervals corresponding to the interocular distance E.
[0003]
[Problems to be solved by the invention]
However, in the above conventional multi-view stereoscopic image display technology, each of the eight pixels is responsible for only displaying an image in one direction, so that one observer is one of the eight pixels a to h. Only two contribute to observation (video recognition). In other words, as the number of viewpoints is increased, the pixel pitch of the image to be observed increases in the horizontal direction, and there is a drawback in that the horizontal resolution decreases.
[0004]
In view of the above circumstances, the present invention is capable of multi-view stereoscopic image display without reducing the horizontal resolution, and has a twin-lens configuration for individual head tracking for a large number of observers. An object of the present invention is to provide a 3D image display device without glasses that can be made possible.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a stereoscopic image display device without glasses of the present invention has a plurality of light-emitting areas, a light source that can switch light emission and extinction in each light-emitting area, and each pixel having a parallax with each other an image display unit that presents switch the images on the three or more temporally sequentially source light reaching corresponding light of the light source to the light emitting regions composed of narrow it in the pixel and guides to the pixel A first optical means for forming a narrow area; a diffusion plate provided between the first optical means and the display screen of the image display means; and a predetermined distance from the display screen of the image display means. A second optical means for condensing the light from the light source light reaching narrow area at a position with an interocular distance or an interval of a smaller width, and emitting the light emitting area according to the display timing of the video With light emission control means Characterized by comprising a.
[0006]
If it is said structure, the light source light arrival narrow area | region (light emission point) corresponding to each said light emission area | region which becomes a narrower width | variety within each pixel will be formed. Then, each light emitting region emits light sequentially, for example, sequentially by the light emission control means, so that the light source light arrival narrow area (light emission point) moves within each pixel, and a position at a predetermined distance from the display screen of the image display means. , The observation areas corresponding to the light source light arrival narrow areas are successively formed at the interocular distance or at a narrower interval. If the image displayed on the screen of the image display means is an image captured from multiple directions, or a computer image corresponding to an image captured from multiple directions, multi-view stereoscopic image display is performed. Here, since each pixel is responsible for displaying video from each direction in a time-sharing manner, multi-view stereoscopic video display is possible without reducing the horizontal resolution. Note that as the number of light source light reaching narrow regions formed in each pixel is increased, images from more directions can be handled.
[0007]
The stereoscopic image display device without glasses of the present invention also includes a light source having a plurality of light emitting areas and capable of switching light emission and extinction in each light emitting area, and two images having parallax in each pixel in terms of time. Image display means for alternately displaying, and first optical means for guiding light from the light source to the pixel and forming a light source light arrival narrow area corresponding to each light emitting area having a narrower width in the pixel When the diffusion plate provided between the first optical means and the display screen of said image display means, from the source light reaching the reduced width region from the display screen to the position at a predetermined distance of said image display means Second optical means for condensing light with an interval corresponding to the interocular distance, light emission control means for causing the light emitting area to emit light in accordance with the display timing of the image, and detecting the position of the observer Based on sensor output Display control means for switching the display of serial two images, characterized by comprising a.
[0008]
With the above configuration, two video regions are alternately formed at a predetermined distance from the display screen with an interval corresponding to the interocular distance. If the left eye of the observer is located in the video area for the right eye and the observer's right eye is located in the video area for the left eye, the sensor detects the position of the head of the observer at this time, and the observer When the light source light arrival narrow region (light emission point) corresponding to the position is formed, by switching the left and right eye images, the observer can appropriately perform stereoscopic vision. On the other hand, since the switching video at this time is not guided to other observers, there is no problem with the stereoscopic vision of other observers. That is, individual head tracking becomes possible. In addition, it can respond to more observers, so that the number of light source light arrival narrow areas formed in each pixel is increased.
[0009]
In addition, the present invention provides a light source having a plurality of light emitting areas and capable of switching between light emission and extinction in each light emitting area, and an image for sequentially switching and displaying three or more images having parallax with each pixel in time. Display means; first optical means for guiding light from the light source to the pixel and forming a light source light arrival narrow area corresponding to each light emitting area having a narrower width within the pixel; and the image display A second optical means for condensing the light from each light source light arrival narrow area at a predetermined distance from the display screen of the means with an interocular distance or an interval having a smaller width; and the second optical means light emission control means to continue to emit light the light-emitting region in accordance with the display timing of the diffusion plate and, before Symbol image narrow area light source light reaching provided is formed between the optical means and the display screen of said image display means And standing without glasses An image display device or a light source having a plurality of light emitting areas and capable of switching between light emission and extinction in each light emitting area, and image display means for alternately displaying temporally two images having parallax on each pixel A first optical means for guiding the light of the light source to the pixel and forming a light source light reaching narrow area corresponding to each light emitting area having a narrower width in the pixel; and the first optical means And a diffusion plate provided between the image display means and the display screen of the image display means, and light from each light source light arrival narrow width region corresponding to the interocular distance at a predetermined distance from the display screen of the image display means A second optical means for condensing light with an interval; a diffusion plate provided between the second optical means and the display screen of the image display means to form a light source light arrival narrow area; and the video Depending on the display timing of 3D image display without glasses, comprising: light emission control means for emitting light on the area; and display control means for switching the display of the two images based on the output of a sensor for detecting the position of the observer. It can also be configured in a device. With such a configuration, since the light source light arrival narrow region can be brought close to the second optical means, the appropriate viewing distance can be shortened.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a 3D image display apparatus without glasses according to this embodiment.
[0011]
The stereoscopic image display device without glasses of this embodiment includes a light source 1, image display means (a liquid crystal display panel 11 and a video signal supply unit 12), an incident side lenticular lens 21 that is a first optical means, and a second. And an emission side lenticular lens 22, a light emission control unit 9, and a diffusion plate 13 .
[0012]
The light source 1 has eight light emitting areas 1a to 1h and can switch light emission and extinction in each light emission area. Such a light source 1 may be configured by, for example, arranging eight fluorescent tubes vertically long, or by arranging a plurality of LEDs and EL elements in the vertical direction to form one light emitting region. This may be configured by providing eight of these. Of course, the number is not limited to eight.
[0013]
The liquid crystal display panel 11 includes a liquid crystal layer, a pair of transparent glass plates provided so as to sandwich the liquid crystal layer, an ITO pixel electrode portion forming one transparent electrode, an ITO solid pattern forming the other transparent electrode, An exit side / incident side polarizing plate is provided. The video signal supply unit 12 processes each video signal from eight cameras (refer to FIG. 5 of the related art) and supplies it to the liquid crystal panel 11. Specifically, the video of the camera 15a → the video of the camera 15b → the video of the camera 15c → the video of the camera 15d → the video of the camera 15e → the video of the camera 15f → the video of the camera 15g → the video of the camera 15h. Display in order.
[0014]
The light emission control unit 9 performs control so that the light emitting areas 1a to 1h of the light source 1 are sequentially emitted one by one. In this example, the light emission position is moved in the right direction in the figure. The light emission / extinction cycle corresponds to the video display cycle on the liquid crystal display panel 11. That is, when the image of the camera 15a is displayed, the leftmost light emitting area 1a in the drawing emits light, and when the image of the camera 15b is displayed, the second light emitting area 1b from the left emits light. Yes.
[0015]
The incident side lenticular lens 21 has a lens portion 21a, and condenses the light of the light source 1 on each pixel portion of the liquid crystal display panel 11, and each light emitting region 1a having a width narrower than the pixel width in each pixel column. A light source light arrival narrow area (light emission point) corresponding to ˜1h is formed. In the drawing, ■ and □ drawn on the light incident surface side of the liquid crystal display panel 11 do not exist as an object, but are collected on the liquid crystal pixels corresponding to the light emitting region where the light source 1 emits light. The light spot (light emission point) is indicated by □, and the portion where the light does not reach corresponding to the light emitting area where the light source 1 does not emit light is merely indicated by ■.
[0016]
The exit-side lenticular lens 22 has lens portions 22 a arranged at a pitch corresponding to the pixel pitch of the liquid crystal display panel 11. Here, when all of the light emitting regions of the light source 1 are caused to emit light, light from the light source reaches the entire pixels, and the image at the observation position of each pixel is smaller than the interocular distance. Since the same image is observed with both eyes, the observer cannot recognize a stereoscopic image. On the other hand, when one light emitting region of the light source 1 emits light, a part of each pixel (light source light arrival narrow region) becomes a light emitting point, and an image of this part at the observation position is an eye in this embodiment. The size corresponds to the distance between the two. When the position of the part (the light source light arrival narrow region) is shifted by one, the image at the observation position for the part moves by a distance corresponding to the interocular distance.
[0017]
In the state shown in FIG. 1, in the light source 1, the second light emitting region 1b from the left emits light, and one of each pixel in the liquid crystal display panel 11 formed corresponding to this one light emitting region 1b. Light from the light source light arrival narrow region (light emission point) is guided to the right eye (region b in FIG. 1) of the observer 3. At this time, the image of the camera 15b is displayed on the liquid crystal display panel 11. When the light emitting region 1c emits light next time, the image of the camera 15c is displayed on the liquid crystal display panel 11, and this image is guided to the left eye of the observer 3 (region c in FIG. 1). Further, after that, the video is sequentially guided such that the video of the camera 15d is in the d area, the video of the camera 15e is in the e area, and so on. The observer 3 can see an image corresponding to the position in accordance with the movement in the left-right direction. Of course, observation by multiple people is also possible.
[0018]
In such a configuration, each pixel is responsible for displaying each image in a time-division manner instead of causing each pixel to be responsible for displaying the image from one direction. In addition, multi-view 3D image display is possible. As the number of light source light reaching narrow regions formed in each pixel is increased, more images can be handled. Furthermore, the width of the image at the observation position by the lens portions 22a of the narrow light emission points only needs to be smaller than the interocular distance. The narrower the width, the smoother the image changes with respect to the observer's movement.
[0019]
(Embodiment 2)
FIG. 2 is an explanatory view showing a 3D image display apparatus without glasses according to this embodiment.
In order to avoid redundancy, the same components as those in FIG. 1 are denoted by the same reference numerals, description thereof is omitted, and differences will be mainly described.
[0020]
The video signal supply unit 12 ′ uses only two images obtained from two cameras, for example, cameras 15 b and 15 c (see FIG. 5), and displays video (b) and video (c) on the screen of the liquid crystal display panel 11. Are alternately formed in time, and when the switching instruction is received from the display control means 14, the two images (b) and (c) are switched.
The display control means 14 gives the switching instruction to the video signal supply unit 12 ′ based on the output of the sensor 10 that detects the position of the head of the observer 3.
[0021]
With the above configuration, two video regions (a right-eye video region and a left-eye video region) are alternately formed at a predetermined distance from the display screen with an interval corresponding to the interocular distance, for example. Here, as shown in FIG. 2, if the left eye of the observer 3B is positioned in the video area for the right eye and the right eye of the observer 3B is positioned in the video area for the left eye, the sensor 10 detects this, When the light source light arrival narrow area (light emission point) corresponding to the position of the observer 3B is formed (when the light emitting areas 1e and 1f emit light), the left and right eye images are switched, and the observer Stereoscopic viewing can be appropriately performed on 3B. On the other hand, at this time, that is, when the light emitting areas 1e and 1f emit light, no image is guided to the observer 3A, so that no trouble is caused in the observation of the observer 3A. That is, individual head tracking becomes possible. Note that, based on the output of the sensor 10, control such as stopping the light emission of the light emitting area for the video area where the observer is not located may be performed, and the interval between the left and right video areas is set to the interocular distance. The width of each video area may not be equal to the interocular distance.
[0022]
(Embodiment 3)
The third embodiment of the present invention will be described below with reference to the drawings.
[0023]
FIG. 3 is an explanatory view showing a 3D image display apparatus without glasses according to the third embodiment. For convenience of explanation, members having the same functions as those in the configuration of the first embodiment are denoted by the same reference numerals and description thereof is omitted. The difference from the first embodiment is that a diffusing plate 13 is arranged between the liquid crystal display panel 11 and the emitting side lenticular lens 22, and an incident side lenticular lens 21 and a light source are formed so as to form an image on the diffusing plate 13. 1 is set. When the diffusing plate 13 is arranged and light that has passed through a part of each pixel (light source light arrival narrow region) of the liquid crystal display panel 11 is imaged on the diffusing plate 11, the exit side lenticular lens is more than in the first embodiment. An image (light emission point) is formed at a position close to 22.
[0024]
That is, when the diffusion plate 13 is not provided, light is condensed on the liquid crystal layer of the liquid crystal display panel, and this portion becomes a light emission point, which is equivalent to the thickness of the exit side glass plate (not shown) in the liquid crystal display panel. Although the light emitting point is far from the emission side lenticular lens 22, the light emission point is brought into close contact with the emission side lenticular lens 22 by providing the diffusion plate 13 and condensing (imaging) light on the diffusion plate 13. It is possible to shorten the appropriate viewing distance (the distance between the exit-side lenticular lens that allows proper stereoscopic viewing and the observer).
[0025]
Of course, the configuration including the diffusion plate 13 can be applied to the second embodiment described above. Also, as shown in FIG. 3, the observable region is not a single region but a plurality of regions are formed (the same applies to the first and second embodiments). In the above embodiment, lenticular lenses are used as the first optical means and the second optical means, but a parallax barrier can be used instead.
[0026]
【The invention's effect】
As described above, according to the present invention, multi-view stereoscopic image display can be performed without reducing the horizontal resolution. In addition, it is a twin-lens configuration, and individual head tracking can be performed even when there are a plurality of observers. Moreover, if it is the structure provided with the diffusion plate, there exists an effect that a suitable viewing distance can be shortened.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a 3D image display apparatus without glasses according to Embodiment 1 of the present invention;
FIG. 2 is an explanatory view showing a 3D image display apparatus without glasses according to Embodiment 2 of the present invention;
FIG. 3 is an explanatory view showing a 3D image display apparatus without glasses according to Embodiment 3 of the present invention;
FIG. 4 is a diagram illustrating the principle of a conventional multi-eye type stereoscopic image display apparatus without glasses.
FIG. 5 is an explanatory diagram showing a plurality of cameras for obtaining multi-view images.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Light source 3 Observer 9 Light emission control part 10 Sensor 11 Liquid crystal display panel 12 Image | video signal supply part 13 Diffusing plate 14 Display control means 21 Incident side lenticular lens 22 Output side lenticular lens

Claims (4)

  A light source having a plurality of light-emitting areas and capable of switching between light emission and extinction in each light-emitting area, image display means for sequentially switching and displaying three or more images having parallax on each pixel, and the light source First optical means for guiding the light of the light source to the pixel and forming a light source light arrival narrow area corresponding to each light emitting area having a narrower width within the pixel, the first optical means and the image A diffusion plate provided between the display screen of the display means and the light from each light source light arrival narrow width region at a predetermined distance from the display screen of the image display means, or a width smaller than the interocular distance 3D image display apparatus without glasses, comprising: second optical means for condensing light with an interval of; and light emission control means for causing the light emitting area to emit light in accordance with the display timing of the video. .   A light source having a plurality of light emitting areas and capable of switching between light emission and extinction in each light emitting area, image display means for alternately displaying two images each having a parallax on each pixel, and light from the light source First optical means for forming a light source light arrival narrow area corresponding to each of the light emitting areas having a narrower width in the pixel, and the first optical means and the image display means The light from each light source light reaching narrow area is collected with a distance corresponding to the interocular distance at a predetermined distance from the diffusion plate provided between the display screen and the display screen of the image display means. Second optical means for emitting light, light emission control means for causing the light emitting area to emit light in accordance with display timing of the video, and display of the two videos based on the output of a sensor for detecting the position of the observer. Display control means for switching , Glasses no stereoscopic image display apparatus characterized by comprising a. A light source having a plurality of light-emitting areas and capable of switching between light emission and extinction in each light-emitting area, image display means for sequentially switching and displaying three or more images having parallax on each pixel, and the light source A first optical means for guiding the light to the pixel and forming a light source light arrival narrow area corresponding to each light emitting area having a narrower width within the pixel, and a predetermined screen from the display screen of the image display means A second optical means for condensing the light from the light source light reaching narrow width region at a distance of a distance with an interocular distance or an interval having a smaller width, the second optical means and the image display further comprising a, a light emission control means to continue to emit light with the light emitting region in accordance with the display timing of the diffusion plate and, before Symbol image narrow area light source light reaching provided is formed between the display screen unit 3D without glasses Image display device. A light source having a plurality of light emitting areas and capable of switching between light emission and extinction in each light emitting area, image display means for alternately displaying two images each having a parallax on each pixel, and light from the light source First optical means for forming a light source light arrival narrow area corresponding to each of the light emitting areas having a narrower width in the pixel, and the first optical means and the image display means The light from each light source light reaching narrow area is collected with a distance corresponding to the interocular distance at a predetermined distance from the diffusion plate provided between the display screen and the display screen of the image display means. A second optical unit that emits light, a diffusion plate that is provided between the second optical unit and the display screen of the image display unit , and in which a light source light arrival narrow region is formed, and according to the display timing of the video To emit light in the light emitting area. Control means and the observer of a display control unit for switching display of the two images located on the basis of the output of the sensor for detecting the glasses without stereoscopic image display apparatus characterized by comprising a.

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