JPH07234459A - Stereoscopic picture display device - Google Patents

Abstract

PURPOSE:To provide a stereoscopic picture display device capable of being miniaturized, or compact. CONSTITUTION:The stereoscopic picture display device is provided with planar light emitting surfaces 10, a driving means letting them emit the light of plural vertical stripes simultaneously moved into a horizontal direction by a prescribed pitch respectively, a lenticular lens 12 arranged in front of the light emitting surfaces 10, in parallel with the stripes of the light emitted by the light emitting surface 10 and composed of plural semicylindrical lens elements having the same width as the light emitting pitch and a liquid crystal panel 13 arranged in front of the light emitting surfaces 10 and switching an image in synchronization with the moving timing of the emission of the light.

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, and more particularly to a stereoscopic image display device which can be made compact and compact.

[0002]

2. Description of the Related Art Generally, a lenticular method, a parallax barrier method, etc. have been proposed as a simple method for obtaining a stereoscopic image without using special glasses. Since the eye information is input, the horizontal resolution is degraded.

As a method for preventing this, there is a method proposed by the University of Cambridge (hereinafter referred to as the Cambridge method), and this method is very useful for a liquid crystal display as shown in the configuration diagram of FIG. It includes a transmissive display 1 having a fast response speed, a collimator lens 2 provided on the rear surface thereof, and an array 3 of light sources provided behind the collimator lens 2 and sequentially emitting light.

The light source section 3a which emits light in the array 3 of light sources
The light emitted further passes through the transmissive display 1 by the action of the collimator lens 2 arranged in front of it, and then is converged with directivity.

Therefore, the screen of the transmissive display 1 is
It is possible to observe only from the direction of convergence, for example, in FIG.
As shown in the principle diagram of No. 3, by switching the lighting of the light source and the screen displayed on the display in synchronization with each other, the convergence direction can be changed in a time series, so that the observation position can be changed. For example, it is possible to display an eight-eye type stereoscopic image.

[0006]

However, in the Cambridge system using the collimator lens 2, the array of light sources 3 and the collimator are arranged in order to allow the light of a large number of light sources 3a to enter each point of the collimator lens 2. It is necessary to increase the distance from the lens 2, which is disadvantageous in terms of size reduction and size reduction.

In view of the above circumstances, it is an object of the present invention to provide a stereoscopic display device that can be made compact and compact.

[0008]

In order to achieve the above object, the present invention emits light in a planar light emitting surface and a plurality of vertical stripes that simultaneously move the light emitting surface in a horizontal direction by a predetermined pitch. Driving means, a lenticular lens arranged in front of the light emitting surface, parallel to the light emitting stripes of the light emitting surface, and composed of a plurality of kamaboko lenses having the same width as the light emitting pitch, and arranged in front of the light emitting surface. And a transmissive image forming panel in which images are switched in synchronization with the light emission movement timing.

Since the above driving device is configured to emit light in a plurality of vertical stripes that simultaneously move in a horizontal direction at a predetermined pitch at a high speed, the above-mentioned driving device, for example, a plurality of devices arranged in parallel on the same plane. Line-shaped cathodes, a back electrode provided behind these cathodes to modify the orbits of electrons emitted from these cathodes, and a large number of parallel slit-shaped openings arranged in front of these cathodes. Then, a grid electrode for drawing out electrons forward from the openings simultaneously selected at a constant pitch, a means for sequentially selecting the openings for drawing out electrons, and applying a high voltage to the electrons drawn out forward by the grid. A high-voltage electrode that accelerates is used.

Further, as the driving device, a plurality of line-shaped cathodes arranged in parallel on the same plane and a back electrode provided behind these cathodes and correcting the trajectories of electrons emitted from these cathodes. A grid electrode arranged in front of these cathodes and having a number of parallel slit-shaped openings, a means for turning on / off the extraction of electrons from the grid electrode to the front, and a grid electrode arranged in front of the grid electrode. It is also possible to use a device provided with a deflection electrode for horizontally deflecting the electrons that are extracted from the front in a horizontal direction, and a high-voltage electrode that applies a high voltage to the electrons extracted toward the front by the grid to accelerate the electrons.

The light emitting surface is not particularly limited, but is formed on one surface of the high voltage electrode in order to miniaturize and downsize the device, and is irradiated with electrons accelerated by the high voltage of the high voltage electrode. It is preferably composed of a light surface.

[0012]

In the present invention, since the light is directed by the vertical stripe-shaped light emitting position on the light emitting surface and the position of the lens element corresponding to the light emitting position, the vertical striped light emitting position is set to the lenticular lens. On the other hand, when it is moved in the horizontal direction, that is, in the pitch direction of the lenticular lens, the light from the light source can be emitted in different directions in time series, and the observation positions can be separated.

Further, the observation position is separated by the movement of the light emitting position, and the image on the transmissive image forming panel is alternately switched between the left eye and the right eye according to the light emitting position, so that the display screen is separated into right and left. It is possible to perform multi-view stereoscopic display performed in time series. In the present invention, the most important point is that if a lenticular lens is used, it is possible to direct the light of the light source by the position of the light emission in the vertical stripe shape of the light emitting surface and the position of the lens element of the lenticular lens parallel to the stripe. Since the property is given, it is not necessary to place a distance between the lenticular lens and the light emitting surface.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A stereoscopic image display apparatus according to an embodiment of the present invention will be specifically described below with reference to FIGS.

As shown in the principle diagram of FIG. 3, in the stereoscopic image display apparatus according to one embodiment of the present invention, the planar light emitting surface 10 is used.
Drive means for emitting light in a plurality of vertical stripes that simultaneously move the light emitting surface 10 in the horizontal direction by a predetermined pitch, and is arranged in front of the light emitting surface 10 and is parallel to the light emitting stripes of the light emitting surface 10. A lenticular lens 12 including a plurality of kamaboko-shaped lens elements having the same width as the light emission pitch, and a liquid crystal panel 1 as a transmissive image forming panel arranged in front of the lenticular lens 12.
3 and 3.

The above-mentioned driving means and the light emitting surface 10 are a glass housing comprising a glass front panel 4 and a rear panel 5 of an electron beam excitation type flat fluorescent lamp as shown in the perspective view of FIG. 4 and the sectional view of FIG. Built in.

That is, the driving means comprises a plurality of linear cathodes 7 arranged in parallel on the same plane with a predetermined distance from the inner surface of the rear panel 5, and the inner surface of the rear panel 5 behind the cathodes. Is formed in a thin film on the back electrode 6 for correcting the trajectories of electrons emitted from the cathodes 7, and is arranged in front of the cathodes 7 and has a large number of parallel slit-shaped openings and has a constant pitch. Two grid electrodes 8a, 8b for drawing out electrons forward from the openings selected simultaneously for each, a high voltage electrode 11 for applying a high voltage to accelerate the electrons drawn out forward by the grids 8a, 8b, and a grid A grid mesh 9 arranged between the electrodes 8a and 8b and the high-voltage electrode 11 and a grid mesh 9 provided outside the glass housing are selectively applied to two grids 8a and 8b to attract electrons. And means for selecting an opening out sequentially.

The light emitting surface 11 is made of a thin fluorescent film formed on the inner surface of the front panel 4.
The inner surface of the high voltage electrode 11 is made of, for example, an aluminum thin film.
Are formed.

As shown in the front view of FIG. 5, each of the grid electrodes 8a and 8b is formed in a comb shape, and is arranged so as to face the other comb so that the comb teeth project into the other comb electrode. A slit-shaped opening is formed in each comb tooth 8b.

The electrons emitted from the line-shaped cathode 7 are diffused and made uniform by the action of the back electrode 6, and the selected one of the grid electrodes 8a and 8b provided in front of the cathode 7 is opened. It is pulled out through.

As shown in FIG. 5, since the grid electrodes 8a and 8b are divided and wired every other slit,
When only one grid electrode, for example, the grid electrode 8a is selected as shown in FIG. 3, electrons are pulled up in a vertical stripe shape with one slit everywhere as shown by an arrow in the figure.

The electrons extracted in front of the grid electrodes 8a and 8b are accelerated by the high-voltage electrode 11 to which a high voltage is applied, and are irradiated to the light emitting surface 10 to excite the light emitting surface 10 to emit light in a vertical stripe shape.

The grid mesh 9 has a grid voltage 8a in order to prevent a strong electric field due to a high voltage applied to the high voltage electrode 11 from being applied to the grid electrodes 8a and 8b.
-Slightly higher voltage than 8b is applied.

If the grid electrodes 8a and 8b are selected alternately, the vertical striped electrons are pulled up alternately, and the light emitting portions and the non-light emitting portions are interchanged.

A lenticular lens 12 is arranged in front of the front panel 4, and the lenticular lens 12 is provided.
Is a pair of a light emitting part and a non-light emitting part of the light emitting surface 10 (10a,
In contrast to 10b), one kamaboko-shaped lens element is arranged so that the directivity of light emission can be switched between right and left in a time series line every time the position of the light emitting portion moves.

Here, when the lenticular lens 12 is used as an optical element which gives directivity to the light on the light emitting surface 10, the position of light emission in the vertical stripe shape of the light emitting surface 10 and the lenticular lens 12 parallel to the stripe. Since the directivity is given to the light of the light source by the position of the lens element and the lens element, it is essentially not necessary to place a distance between the lenticular lens 12 and the light emitting surface 10.

Of course, it is not necessary to provide a space between the lenticular lens 12 and the liquid crystal panel 13, so that
The distance between the lenticular lens 12 and the light emitting surface 10 can be arbitrarily selected, but in this embodiment, the lenticular lens 12 is brought into close contact with the front surface of the front panel 4, and
The liquid crystal panel 13 is brought into close contact with the lenticular lens 12 to make the device small and compact.

The images on the liquid crystal panel 13 are adapted to form a left-eye image and a right-eye image in synchronization with the switching of the light emitting position of the light emitting surface 12 to the left and right.
The left-eye image and the right-eye image can be time-sequentially divided into left and right, and can be observed.

That is, when one of the grid electrodes 8a is selected, the light of the vertical stripe light emitting portion which emits light by the selection is converged to the left eye 10a 'in FIG. 3, and the light for the left eye formed by the liquid crystal panel 13 is formed. The image can be viewed with the left eye 10a '.

Next, when the other grid electrode 8b is selected, the light emitting part and the non-light emitting part up to now are inverted, and the light of the new light emitting part is converged on the right eye 10b 'in FIG. The image for the right eye formed by 13 can be viewed with the right eye 10b '.

If the movement of the light emitting unit and the switching of images are repeated at a speed of a predetermined cycle or more, the image for the left eye and the image for the right eye can be seen by the human eye at the same time, and an image having a stereoscopic effect can be obtained. You will be able to observe.

In this case, since the number of pixels in the horizontal direction of the observed image is the same as the number of pixels in the horizontal direction of the liquid crystal panel 13, the horizontal resolution of the observed image is 2D.
It does not deteriorate compared to the displayed image.

If all the vertical stripes of light emission are selected and the light emitting surface 12 is made to emit light entirely, the display screen is not separated into left and right, and normal 2D display is possible.

In the above embodiment, the light emitting surface 10 is set to 1
At the same time when the slits are placed, light is emitted in the form of a vertical stripe, and the lens element of the lenticular lens 12 is the light emitting surface
One pair is provided for each pair of 0 light-emitting portion and non-light-emitting portion so that a two-eye type stereoscopic image display can be performed.

However, the pitch of the light emitting portions in the form of vertical stripes is set to an integral multiple of 3 times or more the width of the light emitting portions in the horizontal direction,
If the width of the lens element of the lenticular lens 12 is made to coincide with the pitch of its light emitting portion and the image formed by the liquid crystal panel 12 is switched in synchronism with the timing of movement of the light emitting portion, multi-view stereoscopic display is possible. Like

For example, in the case of a three-lens type stereoscopic image display device, light emission in the form of vertical stripes is simultaneously selected at intervals of three times the pitch in the horizontal direction of the light emitting section, and the horizontal direction of the light emitting section is selected. One lens element of the lenticular lens may be arranged at a pitch three times the width in the direction, and the image of the liquid crystal panel 13 may be switched each time the light emission position moves.

Next, a stereoscopic image display device according to a second embodiment of the present invention will be specifically described with reference to the exploded perspective view of FIG. 6 and the principle diagram of FIG.

6 and 7, parts having the same functions as those shown in FIGS. 3 to 5 are designated by the same names and reference numerals, 14 is a grid electrode, and 15a.
15b is a deflection electrode.

Parallel slit-shaped openings 14a are formed in the grid electrode 14 at regular intervals, and by turning on / off the voltage applied to the grid electrode 14, the extraction of electrons to the front is turned on / off. I am trying to do it.

When turned on, the electrons emitted from the cathode 7 are taken out in the form of vertical stripes by the grid electrode 14, and a voltage is applied to the deflection electrodes 15a and 15b to cause the electrons to scan in the horizontal direction.

The ON / OFF cycle of the grid electrode 14 can be set arbitrarily with respect to the scanning cycle in the horizontal direction, whereby it becomes possible to form a plurality of vertical stripe light emission having an arbitrary pitch and width, With the same configuration, the width and pitch of the light emission in the vertical stripe shape for one lens element of the lenticular lens 12 are appropriately set.
It is possible to easily obtain an arbitrary multi-eye type stereoscopic image display device of an eye type or more.

In the drawing, a binocular stereoscopic view is shown. For example, the light emitting surface 10 is divided by the same width as one lens element of the lenticular lens, and each divided portion is further divided into three vertical stripes. Then, by sequentially blinking the vertical stripes of each part, a three-lens type stereoscopic display is possible.

Further, the deflection electrodes 15a and 15b are turned on while continuing to turn on the extraction of electrons forward from the grid electrode 14.
By scanning the electrons in the horizontal direction, the entire light emitting surface 10 can be made to emit light.

[0044]

As described above, in the stereoscopic display device of the present invention, the lenticular lens is used as an optical element that gives directivity to the light emission in the vertical slit shape that moves in time series or the light emission position is sequentially selected. Since it is used, the distance between the light emitting surface and the lenticular lens can be eliminated, and the device can be made compact and compact.

Further, since the images of the transmissive image forming panel are switched in time series, both the left eye image and the right eye image have the same number of horizontal pixels as the transmissive image forming panel. It is possible to obtain the same horizontal resolution as a normal 2D display.

In the present invention, in particular, the driving means is provided with a plurality of line-shaped cathodes arranged in parallel on the same plane, and a back surface provided behind these cathodes and correcting the trajectories of electrons emitted from these cathodes. An electrode and a grid electrode that is arranged in front of these cathodes and has a number of parallel slit-shaped openings, and draws electrons forward from the openings that are simultaneously selected at a fixed pitch, and an opening that draws electrons. And a high-voltage electrode for accelerating by applying a high voltage to the electrons extracted forward by the grid, the light emitting surface is formed on one side of the high-voltage electrode, and is accelerated by the high voltage of the high-voltage electrode. In the case where the driving means and the light emitting surface are integrated into a glass housing, an electron beam excitation type planar fluorescent lamp is used when the fluorescent surface is irradiated with the emitted electrons. It can be used, the entire apparatus more compact and thinner, and can be made compact.

Further, in the present invention, in particular, the driving means is provided with a plurality of line-shaped cathodes arranged in parallel on the same plane, and the orbits of electrons emitted from these cathodes are corrected behind these cathodes. Back electrode to
A grid electrode arranged in front of these cathodes and having a large number of parallel slit-shaped openings, a means for turning on / off the extraction of electrons from the grid electrode to the front, and a grid electrode arranged in front of the grid electrode and arranged in front of the grid electrode. A deflecting electrode for horizontally deflecting the electrons extracted to the front and a high voltage electrode for applying a high voltage to the electrons extracted forward by the grid to accelerate the electrons are provided, and the light emitting surface is formed on one surface of the high voltage electrode. In this case, by appropriately deflecting the scanning period by the deflection electrode and the ON / OFF period of the grid electrode, it is possible to easily change the number of viewpoints with the same configuration, and to realize arbitrary multi-view stereoscopic display. become.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a conventional example.

FIG. 2 is a principle diagram of a conventional example.

FIG. 3 is a principle view of the present invention.

FIG. 4 is a perspective view of an electron beam excitation type flat fluorescent lamp used in the present invention.

FIG. 5 is a front view of a grid electrode of the present invention.

FIG. 6 is an exploded perspective view of an electron beam excitation type flat fluorescent lamp used in the present invention.

FIG. 7 is a principle view of the present invention.

[Explanation of symbols]

 6 Back Electrode 7 Cathode 8a / 8b Grid Electrode 10 Light Emitting Surface 11 High Voltage Electrode 12 Lenticular Lens 13 Liquid Crystal Panel 14 Grid 14a Opening 15 Deflection Electrode

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[Procedure amendment]

[Submission date] August 11, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

The above-mentioned driving means and the light emitting surface 10 are a glass housing comprising a glass front panel 4 and a back panel 5 of an electron beam excitation type flat fluorescent lamp as shown in the perspective view of FIG. 4 and the sectional view of FIG. Built in.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Change

[Correction content]

Further, in the present invention, in particular, the driving means is provided with a plurality of line-shaped cathodes arranged in parallel on the same plane, and the orbits of electrons emitted from these cathodes are corrected behind these cathodes. Back electrode to
A grid electrode arranged in front of these cathodes and having a large number of parallel slit-shaped openings, a means for turning on / off the extraction of electrons from the grid electrode to the front, and a grid electrode arranged in front of the grid electrode and arranged in front of the grid electrode. A deflecting electrode for horizontally deflecting the electrons extracted to the front and a high voltage electrode for applying a high voltage to the electrons extracted forward by the grid to accelerate the electrons are provided, and the light emitting surface is formed on one surface of the high voltage electrode. In this case, the number of viewpoints can be easily changed with the same configuration by appropriately changing the scanning period by the deflection electrode and the on / off period of the grid electrode, and arbitrary multi-view stereoscopic display can be performed. become.

Claims (3)

[Claims] 1. A flat light emitting surface, drive means for causing the light emitting surface to emit light in a plurality of vertical stripes that move simultaneously in the horizontal direction by a predetermined pitch, and arranged in front of the light emitting surface. A lenticular lens, which is parallel to the emission stripe and has the same width as the emission pitch, and is composed of a plurality of kamaboko-shaped lens elements, is arranged in front of the emission surface, and images are switched in synchronization with the movement timing of the emission. A stereoscopic image display device comprising a transmissive image forming panel. 2. A plurality of linear cathodes in which the driving means are arranged in parallel on the same plane, and a back electrode which is provided behind the cathodes and corrects the trajectories of electrons emitted from the cathodes. The grid electrode is arranged in front of these cathodes and has a large number of parallel slit-shaped openings. A grid electrode for extracting electrons forward from the openings simultaneously selected at a constant pitch and an opening for extracting electrons are sequentially selected. And a high-voltage electrode for applying a high voltage to the electrons extracted forward by the grid to accelerate the electrons, the light-emitting surface being formed on one side of the high-voltage electrode, and the electrons accelerated by the high voltage of the high-voltage electrode. The three-dimensional image display device according to claim 1, wherein the three-dimensional image display device is configured by a fluorescent surface on which is illuminated. 3. A plurality of linear cathodes in which the driving means are arranged in parallel on the same plane, and a back electrode which is provided behind these cathodes and corrects the trajectory of electrons emitted from these cathodes. A grid electrode arranged in front of these cathodes and having a large number of parallel slit-shaped openings, a means for turning on / off the extraction of electrons from the grid electrode to the front, and a grid electrode arranged in front of the grid electrode and arranged in front of the grid electrode. A deflecting electrode for horizontally deflecting the electrons extracted to the front and a high voltage electrode for applying a high voltage to the electrons extracted forward by the grid to accelerate the electrons are provided, and the light emitting surface is formed on one surface of the high voltage electrode. The stereoscopic image display device according to claim 1, wherein