JP2676813B2 - 3D display device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a stereoscopic display device, and more particularly to a stereoscopic display device capable of performing stereoscopic display easily and easily.

[Prior Art] There is a holographic display as a three-dimensional image display device, but when displaying multiple types of three-dimensional images, multiple exposure of holograms is required and a plurality of reproduction light sources are required.
It is inevitable that the structure will be complicated, and it is impossible to freely display a moving stereoscopic image.

Therefore, as a display device for freely displaying a stereoscopic image, a device as shown in FIG. 6 has been generally used.
In the figure, D is a flat display, and a right-eye image and a left-eye image are alternately sent to a display drive circuit 41 for driving the flat display through a switching circuit 42 at a constant cycle and reproduced on the display D. The right-eye image and the left-eye image are the 7th
As shown in the figure, the three-dimensional object M is obtained by photographing with the cameras 45 and 46 placed in the right eye position and the left eye position in advance.

On the other hand, the viewer who visually recognizes the display device D wears the glasses 43 with shutters. The shutter 44 operates in synchronization with the switching circuit 42 to alternately block the left and right eyes Er and El, and when the right-eye image is displayed, the right-eye side opens and the left-eye image is displayed. Left eye side opens. By repeating this at high speed, a stereoscopic image can be seen.

[Problems to be Solved by the Invention] In the above-described conventional stereoscopic display device, it is troublesome for a viewer to wear glasses with shutters each time, and it is a simpler and easier display for a vehicle instrument panel or the like. Equipment is requested.

The present invention has been made under such a background, and an object thereof is to provide a stereoscopic display device capable of easily and easily obtaining a stereoscopic display.

[Means for Solving the Problem] The structure of the present invention will be described with reference to FIG. 1. In the stereoscopic display device, the display surface of the display 1 is divided into a plurality of strip-shaped portions 11 and 12 extending vertically with a constant width. And the groups are alternately arranged to display the image for the right eye on the band-shaped portion 11 belonging to one group and the image for the left eye on the band-shaped portion 12 belonging to the other group, and in front of the display surface 1. Is provided with a plurality of light-shielding bands 21 and 22 extending vertically in two rows at front and rear intervals, and the light-shielding bands 21 and 22 in each row are arranged at equal intervals in the left-right direction and a light passage opening is provided between them. 21a, 22a, and the front and rear light-shielding bands 21, 22 are displaced from each other in the left-right direction, and a line l1 connecting the front and rear light passage openings 21a, 22a to the right is provided on the display surface 1. The right eyes Er of the viewers facing each other make the strip-shaped portions 11 belonging to the one of the groups match in the desired direction, and the front and rear optical transmissions are performed. A line l2 connecting mouth 21a, and 22a to the left, in which the viewer's left eye El is allowed coincides with the desired direction of the strip portion 12 belonging to the group of the other.

[Operation] In the apparatus having the above configuration, the image for the right eye is displayed on the strip-shaped portion 11, which is the line l1 connecting the light passage ports 21a and 22a to the right.
Along the way, the viewer's right eye Er is reached and recognized. On the other hand, the strip
The image for the left eye is displayed on 12, which is the light passage openings 21a and 22a.
The left eye El of the observer is reached and recognized along the line l2 that connects the left direction with. Thus, the viewer synthesizes and recognizes a stereoscopic image from these images for the right and left eyes. Light-shielding bands 21 and 22 are 2 in front and back
The light passage openings 21 and 22b are doubled in a row.The right eye Er of the viewer can see the right eye image only along the line l1, and the left eye El sees the left eye image. Since the direction that can be formed is limited to the direction along the line l2, a double image is prevented, and a high quality stereoscopic image can be obtained.

[Embodiment] In FIG. 1, a display 1 is a liquid crystal display whose details will be described later, and its display surface has a constant width in the vertical direction (vertical direction to the paper surface)
Are divided into a plurality of strip-shaped portions 11 and 12 extending in the direction of, and these are alternately connected to form a group, which are connected to the liquid crystal drive circuit 3, respectively.

In front of the indicator 1, a large number of light-shielding bands 21 and 22 having the same width as that of the strip-shaped portions 11 and 12 are arranged in two rows near and far from the strip-shaped portions 11 and 12, respectively. The strip-shaped portion 1 extends in the up-down direction along the portions 11 and 12 and in the left-right direction.
It is arranged at the same pitch as 1 and 12, and the front and rear shading bands 21 and 2
2 are offset from each other in the left-right direction. Then, the line l1 that connects the light passage openings 21a and 22a formed between the light-shielding bands 21 and 22 in the right direction becomes the line that connects the right eye Er of the viewer who visually recognizes the display 1 and the band-shaped portion 11. Match and also the above light passage openings 21a, 22a
The line l2 that connects to the left is the left eye El of the above observer and the above strip
Match the line connecting twelve.

The details of the structure of the light-shielding bands 21 and 22 and the positional relationship between them will be described later.

The details of the liquid crystal display 1 and the liquid crystal drive circuit 3 are shown in FIG. The liquid crystal display 1 has transparent electrodes 13A, 13B, and 14 arranged in front and back of a liquid crystal layer (not shown), and the structure of the liquid crystal part is the same as a known one. The transparent electrodes 13A, 13B, 14 are all band-shaped with a constant width, the electrodes 13A, 13B are alternately provided as column electrodes extending in the vertical direction at equal intervals, and the electrodes 14 are row electrodes extending in the left-right direction at equal intervals. It is provided.

Then, by selectively applying a voltage between the electrodes 13A, 13B and the electrode 14, the liquid crystal layer at the intersection of these electrodes 13A, 13B, 14 is driven to perform display. Here, as described later, the electrode 13A is energized based on the image data for the right eye, while the electrode 13B is energized based on the image data for the left eye. Therefore, the liquid crystal layer behind the electrode 13A becomes the band-like portion 11, and the liquid crystal layer behind the electrode 13B becomes the band-like portion 12.

The liquid crystal drive circuit 3 includes a control circuit 31 and drive circuits 32 and 33 for column electrodes and row electrodes.

The control circuit 31 includes a controller 311 including a computer.
And a ROM 312 having a built-in control program, the column electrode drive circuit 32 is a driver for directly driving each column electrode 13A, 13B.
323, a latch 322 for temporarily storing each video data for the right eye and the left name, and a shift register 321 for serial-parallel conversion of the data. In addition, the row electrode drive circuit 3
Reference numeral 3 includes a driver 332 that directly drives the row electrode 14, and a shift register 331.

Thus, in synchronism with the energization of the row electrodes 14, each of the left and right image data is sent to the latch 322, and the column electrodes 13A and 13B are energized in accordance with the image data.
An image for the right eye is displayed on the strip 11 at the intersection of the electrode 13A and the electrode 14, and an image for the left eye is displayed on the strip 12 at the intersection of the electrode 13A and the electrode 14.

3 and 4 show the detailed structure of the light-shielding bands 21 and 22. Each of the light-shielding strips 21 and 22 is made by printing matte black paint in strips on both sides of a transparent glass 23 having a constant pressure.
As described above, the widths of the light-shielding bands 21 and 22 are the same as the widths of the strip-shaped portions 11 and 12, and the light-shielding bands 21 and 22 are formed at equal intervals in the left-right direction with the same interval as the width, and the space between the light-shielding bands 21 and 22 is The light passage openings 21a and 22a are provided. The front and rear light-shielding bands 21 and 22 are displaced from each other by 1/2 pitch in the left-right direction.

The transparent glass 23 having the light-shielding bands 21 and 22 formed in this manner
As shown in FIG. 5, they are arranged in front of the display device 1 with a space d1 so that the center O of the light passage opening 21a coincides with the boundary between the strip portions 11 and 12. Here, the thickness d2 of the transparent glass 23 is d2 =
2d1

In this state, the line l1 connecting the front and rear light passage openings 21a, 22a to the right coincides with the line connecting the strip 11 and the right eye Er, and the strip 12
Does not coincide with the line connecting the right eye Er. Also, the line l2 connecting the front and rear light passage openings 21a, 22a to the left matches the line connecting the strip 12 and the left eye El, and does not match the line connecting the strip 11 and the left eye El. Here, the pitch P1 of the adjacent strips 11 and 12 is binocular
Since it is sufficiently smaller than the pitch P2 of Er and El, transparent glass
If the distance between 23 and both eyes Er and El is d3, then d3 >> d2,
The lines connecting the front and rear light passage openings 21a and 22a in the right or left direction in parallel with the lines l1 and l2 are all the right eye Er and the other strip portion 11,
Or, it coincides with the line connecting the left eye El and the other strip 12.

Then, the stereoscopic image is synthesized and recognized by selectively visually recognizing the right eye image displayed on the strip 11 by the right eye Er and simultaneously selectively visually observing the left eye image displayed on the strip 12 by the left eye El. .

In the above-mentioned embodiment, the display is not limited to the liquid crystal display, and other types of display such as CRT can be used.

Further, in the above embodiment, the electrodes forming the strip-shaped portions 11 and 12 are formed.
Although 13A and 13B are alternately arranged in each row, the same effect can be obtained by alternately arranging in every plural rows.

[Effects of the Invention] As described above, according to the liquid crystal display device of the present invention, it is possible to easily and easily obtain a plurality of types or moving stereoscopic images without using glasses with shutters. It can be suitably used for display.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention.
FIG. 2 is a schematic plan view showing the structure of the device, FIG. 2 is a block diagram of a liquid crystal driving circuit including the arrangement of transparent electrodes, FIG. A front view of the main part, FIG. 5 is a plan view showing the positional relationship between the display and the light-shielding band, FIGS. 6 and 7 show a conventional example, FIG. 6 is a schematic configuration diagram of the apparatus, and FIG. It is a perspective view which shows the state of image photography. 1 …… Liquid crystal display (display) 11, 12 …… Strip-shaped portions 13A, 13B, 14 …… Transparent electrodes 21, 22 …… Light-shielding bands 21a, 22a …… Light passage opening 23 …… Transparent glass 3 …… Liquid crystal Drive circuit Er …… Right eye El …… Left eye l1 …… Line connecting to the right l2 …… Line connecting to the left

Claims (1)

(57) [Claims] 1. A display surface of a display device is divided into a plurality of vertically extending strip-shaped portions of a constant width to form groups, and a right-eye image is displayed on the belt-shaped portions belonging to one group while the other group is displayed. An image for the left eye is displayed on the band-shaped portion belonging to the group, and a plurality of light-shielding bands extending vertically in two rows are provided in front of the display surface at intervals in front and back, and the light-shielding bands of each row are provided. The light passages are arranged in the left-right direction at equal intervals, and the front and rear light-shielding bands are displaced from each other in the left-right direction to form a line connecting the front and rear light passages to the right. , The right eye of the viewer facing the display surface is aligned with the desired direction of the strips belonging to the one group, and the left eye of the viewer is the line connecting the front and rear light passage openings to the left. A solid characterized by matching the strips belonging to the other group in the desired direction Display devices.