JPH0954282A - Stereoscopic display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a full color stereoscopic display device having high accuracy. SOLUTION: Light emitted from a light emitting element array 1 is reflected by a mirror 4, reflected by a mirror 2 or a mirror 6 according to a reflection angle, and enlarged by a lens 8 or a lens 9 so as to form an image on a left eye or a right eye. At such a time, the pattern of the array 1 is changed at high speed according to the rotation angle of the mirror rotated at high speed, so that the pattern image of the array 1 arrayed in a longitudinal straight line looks like a plane with both right and left eyes because it is expanded laterally by an afterimage effect, and a stereoscopic image is viewed by both right and left videos based on the binocular parallax of a human being. By arranging red, green and blue light emitting element arrays and staggering flickering timing according to the rotation angle of the mirror 4, the full color video is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display device.

[0002]

2. Description of the Related Art In recent years, as a method of displaying a stereoscopic image, a method using a perspective expression in which an image having an expanse in the depth direction is formed by changing an optical path length to an observer's eye, and a parallax barrier is used. By using slits, called thin vertical stripes, images with parallax for the left and right eyes are alternately arranged on the back side of the barrier in vertical stripes to show a stereoscopic view through the parallax barrier, and stereoscopic display using holography. There are multiple holograms that can be reproduced even with white light. Furthermore, in order to utilize the binocular parallax of humans, there is one in which a left-eye image is viewed by the left eye and a right-eye image is viewed by the right eye. To use the binocular parallax of human beings, draw one image with two colors, red and blue, which are complementary colors, and use red and blue color glasses with this image that is slightly shifted left and right. There is an anaglyph system to see and a 3D television using time-division glasses system that utilizes the afterimage effect of the eye.

[0003]

However, in the above-mentioned prior art, the one utilizing the vibration of the mirror as a method for realizing the perspective method is that the reflected image of the mirror moves back and forth, and the reproduction of the front is essentially performed. It happens that it becomes a phantom imaging where you can see the back side that should be hidden in the image or the image inside. A stereoscopic display using a slit has drawbacks such that the slit itself is conspicuous and not bright. The method using holography has a drawback that it is difficult to record / reproduce a hologram of a moving image in real time. The anaglyph method, which utilizes human binocular parallax, has drawbacks such that the image for the left eye and the image for the right eye, which are in a complementary color relationship, can be seen together, and that colorization is difficult. In addition, the time-division type 3D television with glasses system realizes the shutter function electronically on the glasses side by synchronizing with the left and right images displayed alternately by using polarized glasses, and this switching is realized on the screen display side. There is something to do. But,
When the user tilts his / her head diagonally, the angle of the polarization axis of the polarizing glasses deviates from the polarization axis of the polarizing plate that was initially set, so that the separation function deteriorates and the image of the other eye becomes visible. In order to prevent the effect of this phenomenon, it is necessary to observe an image within 10 degrees with respect to the tilt of the head.

Therefore, the present invention provides a bright full-color stereoscopic image that does not cause phantom imaging and is not conspicuous, and provides a stereoscopic display device capable of observing in any posture. With the goal.

[0005]

A stereoscopic display device according to the present invention comprises a light emitting element array arranged in a straight line, eyepieces positioned in front of the left and right eyes, and a rotating mirror positioned in front of them. And a rotating mirror located in the middle of those mirrors. Further, the light emitting element array has three primary colors of red, green and blue to display a full-color stereoscopic image. Further, another light emitting element array is added, and a rotating mirror is provided for the light emitting element array 1 and the light emitting element array 2 so that the left eye image and the right eye image are displayed simultaneously.

[0006]

With the above structure, a stereoscopic image can be displayed, full color display can be performed, and left and right eye images can be simultaneously displayed.

[0007]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a stereoscopic display device according to a first embodiment of the present invention. In FIG. 1, 1 is an LED
The light emitting element arrays 2, 4 and 6 are arranged in a straight line and are rotating mirrors that rotate about the rotation axes 3, 5 and 7, respectively, and the rotation angle and the rotation speed are equal. 8,
An eyepiece lens 9 magnifies the image of the light emitting element.

Considering the case where an image is formed on the left eye in the stereoscopic display device configured as described above, the light emitted from the light emitting element array 1 is reflected by the rotating mirror 4 to change its course to the mirror 2. Next, it is reflected in the direction of the eye by the rotating mirror 2 and is enlarged by the eyepiece lens 8 to form an image on the left eye. Conversely, for the right eye, the mirror 4
The light emitted from the light emitting element array 1 at the time of the rotation is reflected by the mirror 6, is reflected by the mirror 6 in the right eye direction, is enlarged by the eyepiece lens 9 and is focused on the right eye.

Next, the angle of the rotating mirror and the lateral shift of the light imaged on the eye will be described with reference to FIG. Consider the case where an image is formed on the left eye. In FIG. 2, 10 is a state when the rotating mirror 4 in FIG. 1 is at an angle θ, 11 is a state when the angle of the state 10 of the mirror 4 is rotated by an angle δθ from the angle θ, and 12 is a state in FIG. The rotating mirror 2 has an angle θ
The state 13 is a state when the angle of the state 11 of the mirror 2 is rotated from the angle θ by the angle δθ.

The optical path 14 is the optical path of the light emitting element in the states 10 and 12, and the optical path 15 is the states 11 and 13.
Is the optical path of the light emitting element at the time. Here, the distance from the rotation axis 3 to the rotation axis 5 is L, and between the reflection points in the optical path 15 when the angles 2, 4, 6 of the mirror are rotated from the angle θ by the angle δθ to become the angle (θ + δθ). Assuming that the distance is L ′ and the lateral shift width of the light that forms an image on the eye is d, Formula 1 is established from the sine theorem, and L ′ is derived by Formula 2. Further, the deviation width d to be obtained is L'sin (θ−δθ)
Since it is −L, it can be derived as shown in Equation 3.

[0012]

[Equation 1]

[0013]

[Equation 2]

[0014]

(Equation 3)

Thus, the rotating mirrors 2, 4, 6
The image of the light emitting element array 1 is projected laterally in accordance with the rotation angle. Therefore, if the rotational speed of the mirrors 2, 4, 6 and the pattern of the light emitting element array 1 are changed at high speed, the afterimage effect of the human eye causes a left image. It is visible to the eye as one planar image. Furthermore, this is the same for the right eye, so that the viewer can see a stereoscopic image by projecting an image for the left eye and the right eye based on the binocular parallax of a human.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a block diagram of a stereoscopic display device according to the second embodiment of the present invention. Here too, only the case of forming an image on the left eye will be considered for the sake of simplicity.

In FIG. 3, 16 is a red light emitting element array, 17 is a green light emitting element array, 18 is a blue light emitting element array, 19 is a state when the mirror 4 of the rotary shaft 5 is at a rotation angle θ1, and 20 is a θ2. State, 21 is a state of θ3, 22 is a state of the mirror 2 of the rotating shaft 3 at a rotation angle θ1, 23 is a state of θ2, 24 is a state of θ3, 25, 26, 27, Reference numerals 28 and 29 are optical paths of light output from each light emitting element array. Each of the red light emitting element array 16, the green light emitting element array 17, and the blue light emitting element array 18 is attached toward the mirror 4 which rotates the light emitting surface.

In the full-color stereoscopic display device configured as described above, the mirror 4 of the rotary shaft 5 is in the state 1
9. When the mirror 2 of the rotation axis 3 is in the state 22, that is, the rotation angle θ1, the light emitted from the red light emitting element array 16, the green light emitting element array 17, and the blue light emitting element array 18 has optical paths of 27, 26, and 25, respectively. It is projected to the left eye through. When the rotation angle becomes the angle θ2, the optical path 2 becomes
It is projected to the left eye through 8, 27 and 26. When the rotation angle becomes the angle θ3, the optical paths 29, 2
It passes through 8 and 27 and is projected to the left eye. Here, in the optical path 26, the light of the green light emitting element array 17 with the rotation angle θ1 and the light of the blue light emitting element array 18 with the angle θ2 overlap, and in the optical path 27, the light of the red light emitting element array 16 with the rotation angle θ1 and the light of the angle θ2. The light of the green light emitting element array 17 and the light of the blue light emitting element array 17 at the angle θ3 overlap, and the light of the red light emitting element array 16 at the angle θ2 and the light of the green light emitting element array 17 at the angle θ3 overlap on the optical path 28. Utilizing this fact, Equation 3 is used for the positional deviation of the red, green, and blue light emitting element arrays, and the red light emitting element array 16, the green light emitting element array 17, and the green light emitting element array 17, depending on the rotation angles of the mirrors 2, 4, and 6. A full-color stereo image is obtained by shifting the output timing of the pattern of the blue light emitting element array 18 to obtain a full-color image, and outputting the image for the left eye and the right eye based on the binocular parallax of a human. Can be displayed.

(Embodiment 3) A third embodiment of the present invention will be described with reference to the drawings.

FIG. 4 is a block diagram of a stereoscopic display device according to the third embodiment of the present invention. In FIG. 4, 30 is a light emitting element array, 31 and 34 are mirrors for the light emitting element array 1, and 32 and 35 are mirrors for the light emitting element array 30. The mirror 31 and the mirror 32 are attached with a vertical shift of 90 degrees. This also applies to the mirror 34 and the mirror 35.

In the stereoscopic display device configured as described above, when the light of the light emitting element array 1 is reflected by the mirror 4 in the left eye direction, the light from the light emitting element array 30 is reflected in the right eye direction. When the light from the light emitting element array 1 is reflected in the right eye direction, the light from the light emitting element array 30 is reflected in the left eye direction.

According to the stereoscopic display device of the present embodiment, it is possible to display a left-eye image and a right-eye image at the same time.

Therefore, by combining the stereoscopic display device according to the first and second embodiments and the simultaneous display device for the left and right eye images in the third embodiment, a full-color and smooth-moving stereoscopic display device can be obtained. Can be realized.

[0025]

According to the present invention, by using a light emitting element array aligned in a straight line and a rotating mirror, a phantom
It is possible to realize an excellent three-dimensional display that does not become an image, has no obstacles to be noticed, can perform three-dimensional display without a problem even when the head is tilted, and can perform full colorization.

[Brief description of drawings]

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

FIG. 2 is an explanatory view showing a rotation angle of a mirror of the present invention and a lateral shift of light.

FIG. 3 is a configuration diagram of a stereoscopic display device according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a stereoscopic display device according to a third embodiment of the present invention.

[Explanation of symbols]

 1 Light-Emitting Element Array 2 Mirror 3 Rotation Axis 4 Mirror 5 Rotation Axis 6 Mirror 7 Rotation Axis 8 Eyepiece 9 Eyepiece 16 Red Light-Emitting Element Array 17 Green Light-Emitting Element Array 18 Blue Light-Emitting Element Array 30 Light-Emitting Element Array

Claims (3)

[Claims] 1. A light emitting element array arranged in a straight line, a first mirror that reflects light emitted from the light emitting element array while rotating, and an eye that rotates the light reflected by the first mirror. By preparing a second mirror that reflects in the direction of, and an eyepiece lens that magnifies the light of the light-emitting element array, and changing the light-emitting element pattern according to the rotation angle of the first mirror. A stereoscopic display device characterized in that an image of the light emitting element array spreads laterally due to an afterimage effect so as to appear as a plane and right and left binocular images based on binocular parallax are generated. 2. Red, green, and blue light emitting element arrays are arranged, and the red, green, and blue light emitting element arrays are shifted by one dot to emit light at the same time, and the red, green, and blue light emitting element arrays are simultaneously emitted. The stereoscopic display device according to claim 1, wherein the pattern of the light emitting element array of red, green, and blue is changed. 3. A plurality of the light emitting element arrays are prepared, and
A mirror used in combination with the first light-emitting element array and the second light-emitting element array is provided in each part of the first mirror to display a left-eye image and a right-eye image at the same time. The stereoscopic display device according to claim 1.