JP2001258051A - Stereoscopic image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic image display device, that can select a stereoscopic image or a two-dimensional image using a simple configuration, without deteriorating the resolution and displays the selected image. SOLUTION: The stereoscopic image display device is provided with a display device, that can display two-dimensional images and a strip image resulting from arranging alternately left stripe pixels and right stripe pixels, which are obtained respectively by dividing a left eye parallax image and a right eye parallax image into a plurality of stripe pixels in a prescribed sequence into a single image, with an optical means that can provide directivity to luminous flux emitted from a light source means, and allows a viewer to visually recognize a stereoscopic image by separating the stripe image with parallax into different areas which are transmitted through the left or right stripe pixels, when the display device displays the stripe image with parallax, is provided with position revision means, that changes a relative position in the vertical direction of at least one set among the light source means, the optical means and the display device by a prescribed amount and with a position control means that controls the relative position of the set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional image display device, and more particularly to a television, a video, a computer monitor, and a game capable of switching and displaying a two-dimensional image and a three-dimensional image on a display and observing image information of both. This is suitable for observing a two-dimensional image and a three-dimensional image on a machine or the like.

[0002]

2. Description of the Related Art [Conventional example 1] Conventionally, as a method of displaying a stereoscopic image, the state of polarization is changed between a parallax image for the left eye and a parallax image for the right eye, and left and right parallax images are displayed using polarized glasses. There is something that separates. A liquid crystal shutter is provided on the display display side to change the polarization state, and the polarization state is switched in synchronization with the field signal of the display image on the display display. A method of separating images to enable stereoscopic viewing has been put to practical use. However, this method has a drawback that the observer must always wear polarized glasses, which is troublesome.

On the other hand, as a method of displaying a stereoscopic image without using polarized glasses, there is a method in which a lenticular lens is provided on the back of a display and a lenticular lens is used to spatially separate images entering eyes on the left and right sides of an observer.

FIG. 13 is a perspective view of a main part of a stereoscopic image display method (conventional example 1) proposed in Japanese Patent Application Laid-Open No. 9-304739. In the figure, reference numeral 1 denotes a transmission type display device, which is composed of a liquid crystal element. Reference numeral 2 denotes a display pixel portion including a liquid crystal layer formed between two glass substrates 3.

In FIG. 1, a polarizing plate, a color filter, an electrode, a black matrix, an antireflection film and the like are omitted. Reference numeral 4 denotes a backlight (surface light source) serving as an illumination light source. Display device 1 and backlight 4
Between them, a mask substrate (mask) 7 on which a mask pattern 6 having a checkered opening 5 is formed is arranged. The mask pattern 6 is manufactured by patterning a metal deposition film such as chromium or a light absorbing material on a mask substrate 7 made of glass or resin. The backlight 4, the mask substrate 7 and the like constitute one element of the light source means. A lenticular lens 8 made of transparent resin or glass is arranged between the mask substrate 7 and the display device 1. The lenticular lens 8 is a cylindrical lens array formed by arranging vertically long cylindrical lenses in the horizontal direction.

An image displayed on the display device 1 is composed of left and right parallax images R and L as shown in FIG.
n, Rn, and divide them into L1R2
L3R4L5R6... Are arranged side by side to form a horizontal stripe image.

The light from the backlight 4 passes through the openings 5 of the mask substrate 7 and illuminates the display device 1 through the lenticular lens 8, so that the left and right stripe pixels Ln and Rn are separated by both eyes of the observer. Is observed.

FIGS. 15A and 15B are cross-sectional views on a horizontal plane passing through the left and right stripe pixels Ln and Rn. The left and right stripe pixels are visually recognized by the observer's eyes in a horizontal direction. It is explanatory drawing of a principle. The mask substrate 7 is illuminated by the backlight 4, and light is emitted from the opening 5. A lenticular lens 8 is arranged on the observer side of the mask substrate 7, and the curvature of the lens is set so that the mask pattern 6 is located substantially at the focal position of the cylindrical lens 8 a. The opening of the mask pattern 6 and the light-shielding portion are set so as to correspond to one pitch of the lenticular lens 8 in the horizontal direction, and to correspond to the vertical pitch of the stripe pixels in the vertical direction. FIG. 15A shows a right stripe pixel Rn among the horizontal stripe pixels displayed on the display device 1, and light emitted from the opening 5 passes through the lenticular lens 8 and passes through the right stripe pixel Rn on the display device 1. Illuminate with directivity in the direction shown. Thereby, the right stripe pixel Rn is observed only by the right eye of the observer. FIG. 15B corresponds to the left stripe pixel Ln, and the relationship between the opening of the mask pattern 6 and the light-shielding portion is reversed from that in the case of FIG. The left stripe pixel Ln is observed only by the left eye of the observer according to the same principle as described above.

When a normal (no parallax) two-dimensional image Sa as shown in FIG. 16 is displayed on a display device of a three-dimensional image display device using such a three-dimensional image display method,
When displayed as it is, the left-eye stripe pixel Ln
, An image S2n of a two-dimensional image (n is a positive integer)
However, the image S2n + 1 of the two-dimensional image is arranged in a pair with the stripe pixel Rn for the right eye in order. Therefore, the stripe pixels entering the left and right eyes are two-dimensional images Sa
Is divided into horizontal stripe images, and every other pixel (stripe image) is displayed. When displaying fine characters and patterns, the display becomes very difficult to see.

In order to improve the above problem, if the same image is inserted in the left-eye image and the right-eye image as shown in FIG. 17, the same image is observed in the left eye and the right eye. However, the resolution is reduced to half that of a normal two-dimensional image.

[Conventional Example 2] To improve this, FIG.
The light directivity control element 9 shown in FIG.
There is a stereoscopic image observation device provided closer to the observer. As the light directivity control element 9, there is an element formed of polymer dispersed liquid crystal.

FIGS. 19A and 19B are explanatory diagrams of the light directivity control element 9. FIG. The light directivity control element 9 is configured by providing a transparent electrode 11 inside each of two transparent substrates 10 such as glass and plastic films, and filling a polymer 13 in which liquid crystal molecules 12 are dispersed between them. . FIG.
(A) shows a case where no voltage is applied to the light directivity control element 9 in an off state. At this time, the optical axes of the liquid crystal molecules 12 are randomly arranged, the extraordinary light refractive index does not match the refractive index of the polymer 13, and light is scattered at an interface having a different refractive index. FIG. 19B shows a case where a voltage is applied to the light directivity control element 9 in an ON state. At this time, the optical axes of the liquid crystal molecules 12 are arranged in the direction of the electric field as shown in the figure, and the ordinary light refractive index substantially matches the refractive index of the polymer 13.
The incident light is not scattered but is transmitted as it is.

When displaying a stereoscopic image on a display device of a stereoscopic image display device provided with such a light directivity control element 9, a voltage is applied to the light directivity control element 9,
In the non-scattering state shown in FIG. 19B, the illumination light from the backlight 4 illuminates the display device 1 in a state where the directivity given by the mask pattern 6 and the lenticular lens 8 is substantially maintained. Similar to 1, parallax images are observed near the eyes of the observer.

On the other hand, when a normal two-dimensional image is displayed on the display device, no voltage is applied to the light directivity control element 9 and the light diffusion state shown in FIG. At this time, the illumination light from the backlight 4 is transmitted to the light directivity control element 9.
19A, the light has directivity, but reaches the light directivity control element 9 and is diffused in all directions as shown in FIG. 19A, for example, near the right eye as shown in FIG. Alternatively, the directivity of the light beam reaching the vicinity of the left eye as shown in FIG. 15B is disturbed, and a two-dimensional image can be observed in the same manner as a normal two-dimensional display.

[0015]

In a three-dimensional image display device using a three-dimensional image display method as shown in FIG. 18, the light directivity control element 9 is added. The outer surface of each of the two substrates 10 becomes an interface, where the illumination light is scattered. When displaying a three-dimensional image, if the scattered light is large, image crosstalk may occur and image quality may deteriorate.

If the transmittance of the light directivity control element 9 greatly reduces, the brightness of the displayed image may decrease.

According to the present invention, a three-dimensional image and a two-dimensional image can be switched and displayed with a simple configuration, and there is no reduction in resolution when displaying a two-dimensional image. It is an object of the present invention to provide a three-dimensional image display device in which the brightness of an image does not decrease.

[0018]

According to a first aspect of the present invention, there is provided a stereoscopic image display apparatus comprising a left parallax image obtained by dividing a parallax image for the left eye and a parallax image for the right eye into a plurality of stripe-shaped pixels. A display device for displaying a stripe image and a two-dimensional image as one image by alternately arranging stripe pixels and right stripe pixels in a predetermined order; and an optical unit for giving directivity to a light beam emitted from the light source unit. A light source means and an optical means for displaying a three-dimensional image having a parallax on the display device, wherein the light source means and the optical means are transmitted through the left or right stripe pixels and separated into different areas to allow a three-dimensional image to be visually recognized. A position changing means for changing a vertical relative position by at least a predetermined amount for at least one of the display devices; It is characterized in that a position control means for controlling the location.

According to a second aspect of the present invention, in the first aspect of the present invention, at least one of the light source means, the optical means, and the display device by the position changing means is provided.
Any one set of position detecting means for detecting a change in the relative position in the vertical direction, and display control means for selectively displaying the stripe image or the two-dimensional image on the display device in accordance with an output signal of the position detecting means Is provided.

A third aspect of the present invention is characterized in that, in the first aspect of the present invention, the optical means has a first cylindrical lens array formed by arranging a plurality of vertically long cylindrical lenses in the horizontal direction.

According to a fourth aspect of the present invention, in the first aspect, the optical means includes a first cylindrical lens array formed by arranging a plurality of vertically long cylindrical lenses in a horizontal direction, and a vertically long cylindrical lens array. A second cylindrical lens array arranged in a plurality of directions, or the optical means is a toric lens array in which toric lenses having different focal lengths in the horizontal and vertical directions are two-dimensionally arranged in the horizontal and vertical directions. It is characterized by having.

According to a fifth aspect of the present invention, in the third or fourth aspect, the light source means is configured to illuminate a mask substrate or a spatial modulation element having a checkered opening and a light-shielding portion with a surface light source, Alternatively, the light source is formed by forming a light emitting pattern composed of a checkered light emitting portion and a non-light emitting portion on a light emitting surface of a self-luminous display element, and the pair of checkerboard horizontal pitches of the light source means is equal to the first pitch. One of the cylindrical lens arrays or the toric lens array is formed in correspondence with the horizontal pitch, and the stripe image includes a plurality of each of the left-eye parallax image and the right-eye parallax image in the horizontal direction. Each of the striped pixels obtained by dividing the pixels into stripe-shaped pixels is alternately arranged in a predetermined order in the vertical direction to form a horizontal stripe image as one image.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, the left and right horizontal stripe pixels constituting the horizontal stripe image are alternately displayed on the display device for each scanning line.

According to a seventh aspect of the present invention, in the fourth aspect, the second cylindrical lens array or
A vertical pitch of the toric lens array is formed corresponding to a pair of checkerboard vertical pitches of the light source means and a pitch of each stripe pixel forming the horizontal stripe image.

The display device according to the invention of claim 8 is an optical device for guiding a directional light beam to the left and right eyes of an observer, and image information is alternately displayed in a left-eye only area and a right-eye only area at a predetermined pitch. In a display device having a display device to be operated, the optical means has an optical member that shares an image of an area dedicated to the left eye and an image of an area dedicated to the right eye adjacent to each other on the display device.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, the optical member relatively changes at least a part of the optical means and the display device by の of the predetermined pitch. I have.

According to a tenth aspect of the present invention, in the invention of the eighth aspect, one of the display device and the light source is relatively changed by １ ／ of the predetermined pitch.

The three-dimensional image display device according to the eleventh aspect of the present invention is
A light flux from a light source means for emitting a patterned light flux is passed through an optical means to form at least two parallax images, or
A display device capable of displaying a three-dimensional image is illuminated, and when at least two parallax images are displayed on the display device, light beams based on the at least two or more parallax images displayed on the display device are respectively output to the right eye of the observer. And a light source means, an optical means, and a position changing means for changing at least one of the display devices by a predetermined amount. The three-dimensional image and the two-dimensional image to be displayed on the display device are switched by using position control means for controlling the position of the changed member.

The stereoscopic image display apparatus according to the twelfth aspect is
A plurality of openings, a plurality of light-shielding portions, formed in a horizontal direction and a vertical direction at a predetermined pitch, light source means for emitting a patterned light flux from the plurality of openings, and a light flux from the light source means Optical means having different optical actions in the horizontal and vertical directions to provide directivity, and a left stripe pixel obtained by dividing each of the left-eye parallax image and the right-eye parallax image into a plurality of stripe-shaped pixels And a display device for switching and displaying a stripe image or a two-dimensional image as one image by alternately arranging a right stripe pixel and a right stripe pixel in a predetermined order, wherein the light source means, the optical means, Position changing means for changing a vertical relative position of at least one of the display devices by a predetermined amount; and a position control means for controlling the relative position of the set. Using the door, it is characterized in that performing the switching of the three-dimensional image display and two-dimensional images to be displayed on the display device.

[0030]

[First Embodiment] FIG. 1 is a perspective view of a main part of a first embodiment of a stereoscopic image display apparatus according to the present invention. In the figure, DA is a display unit.

Reference numeral 1 denotes a transmission type display device, which is constituted by a liquid crystal element. The display device 1 selectively displays at least two stripe images and two-dimensional images having parallax as described later. 2
Denotes a display pixel portion including a liquid crystal layer formed between two glass substrates 3. In this figure, a polarizing plate, a color filter, an electrode, a black matrix, an antireflection film, and the like are omitted. Reference numeral 4 denotes a backlight (surface light source) serving as an illumination light source. A mask substrate (mask) 7 on which a mask pattern 6 having a checkered opening 5 is formed is arranged between the display device 1 and the backlight 4.

The mask pattern 6 is manufactured by patterning a metal deposition film such as chromium or a light absorbing material on a mask substrate 7 made of glass or resin. The backlight 4, the mask substrate 7 and the like constitute one element of the light source means. Between the mask substrate 7 and the display device 1,
Two lenticular lenses 8, 34 made of transparent resin or glass are arranged. Lenticular lens (first
The lenticular lens 8 includes a first cylindrical lens array in which cylindrical lenses 8a long in the vertical direction (V direction) are arranged in the horizontal direction (H direction).

The lenticular lens (second lenticular lens) 34 is composed of a second cylindrical lens array formed by arranging vertically long cylindrical lenses 34a in a vertical direction. Ma is a moving means (position changing means) for displacing the position of the second lenticular lens 34.

As shown in FIG. 14, the image displayed on the display device 1 is composed of left and right parallax images R and L, each of which has a plurality of horizontal stripe pixels L in a vertical direction.
n, Rn, and divide them into L1, R
2, L3, R4, L5, R6} are arranged side by side to form a horizontal stripe image.

The light from the backlight 4 passes through each opening 5 of the mask substrate 7 and illuminates the display device 1 through the lenticular lenses 8 and 34. The left and right stripe images Ln and Rn are displayed on both eyes of the observer. Observed separately.

FIGS. 15A and 15B are cross-sectional views of a horizontal plane passing through the left and right stripe pixels Ln and Rn, and the left and right stripe pixels are visually recognized by the observer's eyes while being horizontally separated. It is explanatory drawing of a principle. The mask substrate 7 is illuminated by the backlight 4, and light is emitted from the opening 5. On the observer side of the mask substrate 7, lenticular lenses 8, 34 are provided.
(However, since the lenticular lens 34 has no power in the horizontal direction, it is omitted in the figure).
The curvature of the lens is set such that the mask pattern 6 is located substantially at the focal position of the cylindrical lens 8a.
The opening and the light shielding portion of the mask pattern 6 are set so that the horizontal direction corresponds to one pitch of the lenticular lens 8 and the vertical direction corresponds to the vertical pitch of the stripe pixels.

FIG. 15A shows the right stripe pixel R among the horizontal stripe pixels displayed on the display device 1.
The light emitted from the opening 5 passes through the lenticular lens 8 and illuminates the right stripe pixel Rn on the display device 1 in a direction shown in the drawing. Thereby, the right stripe pixel Rn is observed only by the right eye of the observer.

FIG. 15B corresponds to the left stripe pixel Ln, and differs from the case of FIG.
The relationship between the opening and the light shielding portion is reversed. The left stripe pixel Ln is observed only by the left eye of the observer according to the same principle as described above.

In this embodiment, stereoscopic observation is performed with such a configuration. In the present embodiment, the light source means may be configured to illuminate the spatial light modulator with a surface light source instead of the mask substrate having the checkered opening and the light-shielding portion.

Alternatively, the light source means may be formed by forming a light emitting pattern composed of a checkered light emitting portion and a non-light emitting portion on the light emitting surface of the self-luminous display element.

FIG. 2 is a detailed explanatory view of the moving means (position changing means) Ma and the second lenticular lens 34.

The second lenticular lens 34 is held by a slider 14 which is fixed in the horizontal direction and movable in the vertical direction, and a rack gear 15 is provided at one end thereof. The rack gear 15 is connected to a gear 16 that is rotatable about a point C.
And a 2D / 3D switching lever 17 for two-dimensional image observation and three-dimensional image observation operable in an arc around the center.

That is, by operating the 2D / 3D switching lever 17, the vertical position of the second lenticular lens 34 can be changed via the gear 16 and the rack gear 15, so that the position changing means can be used. Is composed. The rack gear 15 is provided with a slot-shaped opening 15a, and a positioning pin 18 for regulating the moving range of the second lenticular lens 34 is provided inside the opening 15a on a base substrate (not shown). Is provided.

At the point A of the gear 16, the torsion coil spring 1
The arm 9 is rotatably mounted around a point A, and the other end of the torsion coil spring 19 is rotatably mounted at an arbitrary point B on a base substrate (not shown). The torsion coil spring 19 provides a click feeling when the 2D / 3D switching lever 17 is operated, and the point C
Is applied as a rotational force centered at the direction indicated by the solid and dotted arrows in the figure. That is, the position control means is constituted by the spring force of the torsion coil spring 19, the opening 15 a of the rack gear 15 and the positioning pin 18. As shown in FIG. 2, this moving distance is set to half VL / 2 of the pitch VL of the cylindrical lens of the second lenticular lens 34. Further, in order to detect a change in the position of the second lenticular lens 34, a detection switch (position detection means) 2 such as a microswitch is provided.
0 is provided.

FIG. 3 is a system configuration diagram of the stereoscopic image display device of the present invention. DA is a display unit including the components described in FIGS. 1 and 2. DB is a display control means for outputting an image signal to be displayed on the display unit DA, and is composed of various components such as a computer. The display unit DA and the display control means DB are:
Video signal communication device 21 for communicating video signals and signal communication device 22 for communicating various signals other than video signals
Connected by

Video signal communication device 21, signal communication device 22
Is composed of a communication cable and an infrared wireless communication device.

The display DA is provided with a liquid crystal driving circuit 23 for driving the liquid crystal of the display device 1, a backlight driving circuit 24 for lighting and dimming the backlight 4, and a display control circuit 25.
The display control circuit 25 includes a detection switch 20, a video signal communication device 21, a signal communication device 22, a liquid crystal drive circuit 23, a backlight drive circuit 24, a power supply (not shown), in addition to the liquid crystal drive circuit 23 and the backlight drive circuit 24. And various switches for adjusting brightness, contrast, color balance, etc., are connected to control various circuits in the display DA and output signals to the display control means DB in accordance with the input of each signal or switch.

The display control means DB stores the parallax images for the left and right eyes as shown in FIG. 14. The image recording device 26 is composed of a semiconductor memory or a hard disk. An image processing circuit 27 and a central control circuit 28 for generating a horizontal stripe image and a normal two-dimensional image are provided.

The central control circuit 28 is connected to the video signal communication device 21, the signal communication device 22, the image recording device 26, and the image processing circuit 27. It controls the apparatus and outputs signals to the display DA.

A case where a stereoscopic image is displayed on the display unit DA in the stereoscopic image display apparatus thus configured will be described.

In FIG. 2, when displaying a stereoscopic image, 2D / 3
The D switching lever 17, the positioning pin 18, and the torsion coil spring 19 are at positions shown by solid lines, and the second lenticular lens 34 is held by these members. At this time, the hinge lever 20a of the detection switch 20 is pushed to one end of the second lenticular lens 34 as shown in FIG.
To the central control circuit 28 via the signal communication device 22. In response to this signal, the display control means DB causes the image processing circuit 27 to execute the image recording device 26.
A horizontal stripe image is created from the parallax image for the left eye and the parallax image for the right eye stored in the storage device, and an image signal is output to the display control circuit 25 via the video signal communication device 21. The display control circuit 25 controls the liquid crystal drive circuit 23 based on this signal, and alternately displays the horizontal stripe pixels for the left and right eyes forming the horizontal stripe image for each scanning line of the display device 1.

FIGS. 4A and 4B are vertical sectional views including the right eye and the left eye, respectively, illustrating the enlargement of the vertical stereoscopic viewing area by the second lenticular lens 34. FIG. is there.

In the vertical direction, the centers of the horizontal stripe pixels Ln and Rn of the display device 1, the center of each lens of the second lenticular lens 34, and the center of the opening 5 of the mask pattern 6 are linearly arranged. The luminous flux of the backlight 4 passing through the openings 5 arranged in the horizontal direction is given directivity to the right eye or the left eye by the action of the first lenticular lens 8 as described above, and then the second lenticular lens 34 It is configured to be focused on the horizontal stripe pixels Ln and Rn.

That is, by the action of the first lenticular lens 8, the illumination light having directivity in the right eye direction or the left eye direction illuminates only the corresponding horizontal stripe pixels Ln and Rn without crosstalk. ing. The light flux condensed on the horizontal stripe pixels Ln, Rn becomes a divergent light flux from there, spreads in the vertical direction to the observation position, and forms a vertically wide viewing zone at an optimum observation viewing distance. Thereby, good stereoscopic image observation is achieved.

The vertical pitch VL of the second lenticular lens 34 is set so as to satisfy the following equation.

Vm / Vd = Lv2 / Lv1 2 · Vd / VL = (Lv1 + Lv2) Vm: vertical width of opening / light-shielding portion of mask pattern 6 VL: pitch of second lenticular lens 34 Vd: vertical of display device 1 Lv1: The optical distance between the display device 1 and the second lenticular lens 34 Lv2: The optical distance between the second lenticular lens 34 and the mask pattern 6 A case where a two-dimensional image is displayed will be described.

2D / 3D switching lever 1 in FIG.
When 7 is set to the position indicated by the dotted line, the second lenticular lens 34 moves and is held downward by the distance VL / 4 in the vertical direction in FIG. At this time, the display device 1 and the mask substrate 7 are held on a base substrate (not shown), and the relative positions of the second lenticular lens 34 and the display device 1 and the mask substrate 7 (mask pattern 6) change by VL / 4. It will be.

At this time, the hinge lever 20a of the detection switch 20 is opened, and the output signal is transmitted to the display control circuit 25 and further transmitted to the central control circuit 28 via the signal communication device 22. Upon receiving this signal, the display control means DB converts the parallax image for the left eye and the parallax image for the right eye stored in the image recording device 26 by the image processing circuit 27 into, for example, a parallax image for the left eye as a normal two-dimensional image. The selected image signal is output to the display control circuit 25 via the video signal communication device 21.
The display control circuit 25 controls the liquid crystal drive circuit 23 based on this signal, and displays the parallax image for the left eye on the entire display device 1.

FIGS. 5A and 5B are vertical cross-sections including the right eye and the left eye, respectively, when the second lenticular lens 34 is moved and held downward by a distance VL / 4 in the vertical direction of FIG. FIG. The luminous flux from the backlight 4 that has passed through the openings 5 arranged in the mask pattern 6 on the mask substrate 7 in the horizontal direction is given directivity in the right or left eye direction by the action of the first lenticular lens 8. Ln, Ln on the horizontal stripe pixel by two lenticular lens 34
The light is condensed at a width of approximately Vd around the boundary of Rn.

In FIG. 5A, the lower half of Ln in the vertical direction and the upper half of Rn in the vertical direction are near the observer's right eye.
(B) shows a state in which the upper half in the vertical direction of Ln and the lower half in the vertical direction of Rn can be observed near the left eye of the observer.

FIGS. 6A and 6B are horizontal sectional views of the horizontal stripe pixels Sn of the display device 1 at this time.

FIG. 6A shows the state of the upper half of the horizontal stripe pixel Sn in the vertical direction, and FIG. 6B shows the state of the lower half of the horizontal stripe pixel Sn in the vertical direction. I have. FIG. 6A shows that the horizontal stripe pixel Sn
The light that illuminates and transmits the upper half in the vertical direction is focused near the right eye of the observer, and from FIG. 6B, illuminates the lower half in the vertical direction of the horizontal stripe pixel Sn. The transmitted light is collected near the left eye of the observer.

That is, it can be seen that the horizontal stripe pixel Sn is observed by both the right eye and the left eye.

This relationship is similar to that of the other horizontal stripe pixels Sn +
1 and Sn + 2, the horizontal stripe pixels S1S2S3... Sn are all observed with the left and right eyes, and can be observed well even when a normal two-dimensional image is displayed. No reduction occurs.

In the present embodiment, the parallax image for the left eye is selected as the two-dimensional image, but a parallax image for the right eye may be selected.

In this embodiment, it is not necessary to add a light directivity control element at the time of two-dimensional image observation, so that there is no scattering of illumination light with both end faces of the light directivity control element 9 as interfaces. There is no decrease in transmittance due to the directivity control element.

That is, the three-dimensional image display device of the present invention can display a good three-dimensional image without deterioration in image quality due to crosstalk and no decrease in luminance of a display image, and at the same time, can display a normal two-dimensional image on the device. Even when an image is displayed, it is possible to display a good two-dimensional image without lowering the resolution.

In the above-described embodiment, the position of the second lenticular lens 34 can be changed. However, as shown in FIGS. 7 and 8, the position of the display device 1 or the mask substrate 7 (mask pattern 6) can be changed. The display device 1, the mask substrate 7 (mask pattern 6) and the second lenticular lens 34
It is possible to achieve a stereoscopic image display device having the same effect as described above even if the relative relationship of one set of members is changed.

When the display device 1 shown in FIG. 7 is changed, only one half of the pitch Vd is used. The situation at this time is shown in FIG. When the mask substrate 7 shown in FIG. 8 is changed, it is の of the pitch Vm.

Further, as shown in FIG. 9, the toric lens array 35 in which the toric lenses 35a having different focal lengths in the horizontal and vertical directions are two-dimensionally arranged in the horizontal and vertical directions has a position changeable structure. Even if the relative relationship between the display device 1, the mask substrate 7 (mask pattern 6), and one set of members of the toric lens array 35 is changed, a stereoscopic image display device having the same effect as described above is achieved. It is possible.
When changing the toric lens array 35, the pitch V
It is 1/4 of T.

Further, as shown in FIG. 10, a motor 29 for driving the second lenticular lens 34, a worm gear 30, wheel gears 31, 2D / 3D changeover switches 32, and position control means 33 including a position sensor are provided. , The position of the second lenticular lens 34 may be changed to a desired position by electrically controlling the rotation amount of the motor 29 by the position control means 33 in accordance with the input to the 2D / 3D switch 32. . At this time,
The output signal of the 2D / 3D switch 32 is transmitted to the display control circuit 25, and the position control means 33 drives the motor 29. The output signal of the 2D / 3D switch 32 is also transmitted to the display control means B, and a three-dimensional image based on a horizontal stripe image or a normal two-dimensional image is displayed on the display device 1 in the same procedure as described above. You.

As described above, in the present embodiment, at least one of the light source means, the optical means, and the display device by the position changing means, the position detecting means for detecting a change in the relative position in the vertical direction, and the position detecting means. In response to the output signal, a stripe image or a normal two-dimensional image is selectively displayed on a display device, and both images are favorably observed.

[Second Embodiment] FIG. 11 is a perspective view of a main part of a stereoscopic image display apparatus according to a second embodiment of the present invention. FIG. 7 is a schematic diagram of main parts when the display device 1 is moved in the present embodiment. In the figure, components having the same reference numerals as those in FIG. 1 have the same functions as those described in the example, and can observe a stereoscopic image on the same principle.

As shown in FIG. 7, the display device 1 is provided with moving means (position changing means) equivalent to that described in FIG. 2 of the first embodiment. The display including these components constitutes the same system as that shown in FIG.

In the figure, components having the same reference numerals as those in the first embodiment of the present invention have the same functions as those described in the first embodiment.

A case where a stereoscopic image is displayed by the stereoscopic image display device thus configured will be described.

In FIG. 7, when displaying a stereoscopic image, 2D /
The 3D switching lever 17, the positioning pin 18, and the torsion coil spring 19 are at positions shown by solid lines, and the display device 1 is held by these members. At this time, the hinge lever 20a of the detection switch 20 is pushed to one end of the display device 1 as shown in the figure, and its output signal is transmitted to the display control circuit 25, and further transmitted to the central control via the signal communication device 22. Circuit 2
It is conveyed to 8. In response to this signal, the display control means DB creates a horizontal stripe image from the parallax image for the left eye and the parallax image for the right eye stored in the image recording device 26 by the image processing circuit 27, and controls the video signal communication device 21. The image signal is output to the display control circuit 25 via the display control circuit 25. The display control circuit 25 controls the liquid crystal drive circuit 23 based on this signal, and alternately displays the left and right horizontal stripe pixels forming the horizontal stripe image for each scanning line of the display device 1. Fig. 1
The stereoscopic image can be observed by the same principle as described in the above.

On the other hand, a case where a normal two-dimensional image is displayed in such a three-dimensional image display device will be described.

First, the observer operates the 2D / 3D switching lever 17 in an arc shape and feels the click of the torsion coil spring 19, and the position where the positioning pin 18 abuts on the slot-shaped opening of the rack gear 15 (the dotted line in FIG. 7). (The position indicated by). The rotation of the gear 16 that rotates integrally with the 2D / 3D switching lever 17 is transmitted to the rack gear 15 to change the position of the display device 1 in the vertical direction. At this time, the positioning pin 18 is brought into contact with the slot-shaped opening of the rack gear 15 by the spring force of the torsion coil spring 19. That is, the amount of change in the position of the display device 1 is regulated by the elongated hole-shaped opening and the positioning pin 18. Here, assuming that the vertical pixel pitch of the display device 1 is Vd, the moving distance is the same as the pixel pitch Vd as shown in FIG.
Vd / 2, which is half of When the 2D / 3D switching lever 17 is set to the position shown by the dotted line, the display device 1 moves and is held downward by the distance Vd / 2 in the vertical direction in FIG. At this time, the mask substrate 7 is held on a base substrate (not shown), and the relative position between the display device 1 and the mask substrate 7 (mask pattern 6) is changed by Vd / 2.

At this time, the hinge lever 20a of the detection switch 20 is opened, and the output signal is transmitted to the display control circuit 25 and further transmitted to the central control circuit 28 via the signal communication device 22. Upon receiving this signal, the display control means DB converts the parallax image for the left eye and the parallax image for the right eye stored in the image recording device 26 by the image processing circuit 27 into, for example, a parallax image for the left eye as a normal two-dimensional image. The selected image signal is output to the display control circuit 25 via the video signal communication device 21.
The display control circuit 25 controls the liquid crystal drive circuit 23 based on this signal, and displays the parallax image for the left eye on the display device 1.

FIG. 6 shows the display device 1 at this time.
FIG. 8 is a horizontal cross-sectional view of the horizontal stripe pixel Sn when is moved downward by a distance Vd / 2 in FIG. 7 and held.

FIG. 6A shows the state of the upper half of the horizontal stripe pixel Sn in the vertical direction, and FIG. 6B shows the state of the lower half of the horizontal stripe pixel Sn in the vertical direction. I have.

As in the first embodiment, as shown in FIG. 6A, the light illuminating and transmitting the upper half of the horizontal stripe pixel Sn in the vertical direction is condensed near the right eye of the observer. 6
From (B), the light that illuminates and transmits the lower half of the horizontal stripe pixel Sn in the vertical direction is collected near the left eye of the observer.

That is, it can be seen that the horizontal stripe pixel Sn is observed by both the right eye and the left eye. This relationship is similarly established for the other horizontal stripe pixels Sn + 1 and Sn + 2, so that the horizontal stripe pixels S1S2S
3... Sn are all observed with the left and right eyes, and can be observed well even when a normal two-dimensional image is displayed.
Moreover, the resolution does not decrease.

In the present embodiment, the parallax image for the left eye is selected as the two-dimensional image, but a parallax image for the right eye may be selected.

Also, in this embodiment, similarly to the first embodiment, it is not necessary to add a light directivity control element, so that there is no scattering of illumination light having both end faces of the light directivity control element 9 as interfaces. Also, there is no decrease in transmittance due to the light directivity control element 9.

That is, the three-dimensional image display device of the present invention can display a good three-dimensional image without deterioration in image quality due to crosstalk and no reduction in luminance of a display image, and at the same time, can display a normal two-dimensional image on the device. , It is possible to display a good two-dimensional image without lowering the resolution.

In the second embodiment, the structure of the display device 1 is changeable. However, as described in the first embodiment, the structure of the mask substrate 7 (mask pattern 6) may be changed.

Also, as shown in FIG.
A motor 29, a worm gear 30, a wheel gear 31, a 2D / 3D changeover switch 32, and a position control means 33 including a position sensor.
The position of the mask substrate 7 (mask pattern 6) is changed to a desired position by electrically controlling the rotation amount of the motor 29 by the position control means 33 in accordance with the input to the D / 3D switch 32. Is also good. At this time, the output signal of the 2D / 3D switch 32 is output to the display control circuit 25.
And the motor 29 is driven by the position control means 33. The output signal of the 2D / 3D changeover switch 32 is also transmitted to the display control means B, and a three-dimensional image based on a horizontal stripe image or a normal two-dimensional image is displayed on the display device 1 in the same procedure as in the first embodiment. Is displayed.

In each of the above embodiments, the display device may be used as a display device for displaying only a normal two-dimensional image and observing the two-dimensional image.

In this case, as described above, each member may be adjusted for two-dimensional image observation.

[0092]

According to the present invention, a three-dimensional image and a two-dimensional image can be switched and displayed with a simple configuration, and there is no reduction in resolution when displaying a two-dimensional image. It is possible to achieve a three-dimensional image display device in which deterioration is prevented and the luminance of a display image is not reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a stereoscopic image display device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a moving unit (position changing unit) in FIG. 1;

FIG. 3 is a system configuration diagram of the stereoscopic image display device of the present invention.

FIG. 4 is a vertical sectional view including a right eye and a left eye of the stereoscopic image display device of the present invention.

FIG. 5 is a vertical sectional view including a right eye and a left eye of the stereoscopic image display device of the present invention.

FIG. 6 is a horizontal sectional view of a horizontal stripe pixel Sn of the stereoscopic image display device of the present invention.

FIG. 7 is an explanatory diagram of moving means in the stereoscopic image display device of the present invention.

FIG. 8 is an explanatory diagram of moving means in the stereoscopic image display device of the present invention.

FIG. 9 is a first embodiment of a stereoscopic image display device according to the present invention.
Explanatory drawing of another embodiment of

FIG. 10 is an explanatory diagram of another embodiment of the first embodiment in the stereoscopic image display device of the present invention.

FIG. 11 is a perspective view of a main part of a stereoscopic image display device according to a second embodiment of the present invention.

FIG. 12 is an explanatory diagram of another embodiment of the stereoscopic image display device according to the second embodiment of the present invention.

FIG. 13 is a perspective view of a main part of a conventional stereoscopic image display device.

FIG. 14 is an explanatory diagram of a horizontal stripe image according to the stereoscopic image display device of the present invention.

FIG. 15 is a cross-sectional view on a horizontal plane of horizontal stripe pixels Ln and Rn according to the stereoscopic image display device of the present invention.

FIG. 16 is an explanatory diagram of a two-dimensional image.

FIG. 17 is an explanatory diagram of a two-dimensional image having a resolution of 1/2.

FIG. 18 is a perspective view of a main part of a conventional stereoscopic image display device 2.

FIG. 19 is an explanatory diagram of a conventional light directivity control element.

FIG. 20 is a vertical sectional view including the right eye and the left eye of the stereoscopic image display device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display device 2 Display pixel part 3 Glass substrate 4 Backlight 5 Checkered opening 6 Mask pattern 7 Mask substrate (mask) 8 First lenticular lens 9 Light directivity control element 10 Transparent substrate 11 Transparent electrode 12 Liquid crystal molecule 13 Polymer 14 Slider 15 Rack gear 16 Gear 17 2D / 3D switching lever 18 Positioning pin 19 Torsion coil spring 20 Detection switch 21 Video signal communication device 22 Signal communication device 23 Liquid crystal drive circuit 24 Backlight drive circuit 25 Display control circuit 26 Image recording device 27 Image processing circuit 28 Central Control Circuit 29 Motor 30 Worm Gear 31 Wheel Gear 32 2D / 3D Changeover Switch 33 Position Control Means 34 Second Lenticular Lens 35 Toric Lens Array

Claims (12)

[Claims] A left stripe pixel and a right stripe pixel obtained by dividing each of a left-eye parallax image and a right-eye parallax image into a plurality of stripe-shaped pixels are alternately arranged in a predetermined order to form one image. A display device for displaying a striped image and a two-dimensional image as images, and an optical unit for giving directivity to a light beam emitted from the light source unit, and when displaying a stripe image with parallax on the display device, In a three-dimensional image display device which transmits a left or right stripe pixel and separates them into different regions to allow a three-dimensional image to be visually recognized, at least one of the light source means, the optical means, and the display device is vertically aligned. Position change means for changing the relative position by a predetermined amount and position control means for controlling the set of relative positions are provided. That the three-dimensional image display apparatus. 2. A position detecting means for detecting a change in a vertical relative position of at least one of the light source means, the optical means, and the display device by the position changing means. The three-dimensional image display device according to claim 1, further comprising a display control unit that selectively displays the stripe image or the two-dimensional image on the display device according to an output signal. 3. The three-dimensional image display device according to claim 1, wherein said optical means has a first cylindrical lens array formed by arranging a plurality of vertically long cylindrical lenses in a horizontal direction. 4. The optical means comprises a first cylindrical lens array comprising a plurality of vertically long cylindrical lenses arranged in a horizontal direction, and a second cylindrical lens comprising a plurality of horizontally long cylindrical lenses arranged in a vertical direction. 2. The toric lens array according to claim 1, wherein said optical means has a toric lens array in which toric lenses having different focal lengths in horizontal and vertical directions are arranged two-dimensionally in horizontal and vertical directions. The stereoscopic image display device as described in the above. 5. A light source means for illuminating a mask substrate or a spatial light modulator having a checkered opening and a light-shielding portion with a surface light source, or the light source is provided on a light emitting surface of a self-luminous display element. A light emitting pattern composed of a checkered light emitting portion and a non-light emitting portion is formed on the light emitting device, and the pair of checkered horizontal pitches of the light source means is equal to that of the first cylindrical lens array or the toric lens array. The stripe image is formed corresponding to a horizontal pitch, and the stripe image is obtained by dividing each of the left-eye parallax image and the right-eye parallax image into a plurality of stripe-shaped pixels in the horizontal direction. 5. The three-dimensional image display device according to claim 3, wherein the three-dimensional image display device comprises a horizontal stripe image in which stripe pixels are alternately arranged in a predetermined order in a vertical direction to form one image. 6. The three-dimensional image display device according to claim 5, wherein the left and right horizontal stripe pixels constituting the horizontal stripe image are alternately displayed on the display device for each scanning line. 7. The second cylindrical lens array,
Alternatively, the vertical pitch of the toric lens array is formed so as to correspond to a pair of checkerboard vertical pitches of the light source means and the pitch of each stripe pixel forming the horizontal stripe image. Claim 4
3. The stereoscopic image display device according to 1. 8. A display device comprising: an optical means for guiding a directional light beam to the left and right eyes of an observer; and a display device for alternately displaying image information in a left-eye only area and a right-eye only area at a predetermined pitch. 3. The display device according to claim 1, wherein the optical unit has an optical member that shares an image of the left-eye only area and an image of the right-eye only area adjacent to each other on the display device. 9. The display device according to claim 8, wherein the optical member relatively changes at least a part of the optical means and the display device by １ ／ of the predetermined pitch. 10. The display device according to claim 8, wherein one of said display device and said light source means is relatively changed by の of said predetermined pitch. 11. A display device capable of displaying at least two parallax images or two-dimensional images by passing a light beam from a light source means for emitting a patterned light beam through an optical means, and illuminating the display device. When at least two parallax images are displayed, a luminous flux based on at least two or more parallax images displayed on the display device is guided to the right eye and the left eye of the observer, respectively, and a stereoscopic image for stereoscopically observing image information. An image observation apparatus, comprising: a position changing unit configured to change at least one of the light source unit, the optical unit, and the display device by a predetermined amount, and a position control unit configured to control a position of the changed member. Switching between a stereoscopic image and a two-dimensional image to be displayed on a display device. Image display device. 12. A light source means for forming a plurality of openings and a plurality of light shielding portions in a horizontal direction and a vertical direction at a predetermined pitch, and for emitting a patterned light beam from the plurality of openings, and the light source. Optical means having different optical actions in the horizontal and vertical directions to give directivity to the luminous flux from the means, and each of the parallax image for the left eye and the parallax image for the right eye is divided into a plurality of stripe-shaped pixels. A stereoscopic image display device having a display device for switching and displaying a stripe image or a two-dimensional image as one image by alternately arranging the obtained left stripe pixels and right stripe pixels in a predetermined order, comprising: Optical means, and position changing means for changing a relative position in the vertical direction by a predetermined amount for at least one of the display devices, and controlling the relative position of the set Using the position control means of the fit, the three-dimensional image and the 2 to be displayed on the display device
A three-dimensional image display device, which switches display of a three-dimensional image.