JPS63305322A - Stereoscopic display device - Google Patents

Abstract

PURPOSE:To obtain a stereoscopic image of high quality without generating a flickering phenomenon by crossing the polarizing axes of right and left polarizing plates of polarizing glasses with each other and making one of the crossed axes coincide with the polarizing axis of the polarizing plate. CONSTITUTION:Beams radiated from a CRT 39 are matched with a fixed direction by the deflecting plate 20 and the polarizing axis or a light absorbing axis 20A is matched or crossed with the rubbing direction 6A of a liquid crystal orientation film 6 on a lower substrate of a liquid crystal cell 10, so that when the cell 10 is off, light is rotationally polarized and projected. Since the polarizing axes or light absorbing axes 31A, 32A of the polarizing glasses 40 are crossed with each other and one of them coincides with the direction 20A of the plate 20, light is passed only through the left polarizing plate 31 when the cell 10 is on. Thereby, a stereoscopic image generating no flickering phenomenon can be recognized by recognizing left eye information only by the left eye and right eye information only by the right eye by means of the polarizing glasses.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stereoscopic display device that displays stereoscopic images.

[Prior Art] Conventionally, as this type of stereoscopic display device, CBT
(Cathode-Ra7-Tube) A VH that alternately displays images for the left eye and for the right eye, and uses synchronized shutter glasses to create stereoscopic visualization.
Method D has been put into practical use.

[Problem that the invention seeks to solve]

However, the three-dimensional display device configured in this manner has a problem in that the overall configuration of the device is large, p1 lacks portability, and eye fatigue is likely to occur due to the flicker phenomenon that accompanies image switching.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a three-dimensional display device that can obtain high-quality three-dimensional images without causing the flicker phenomenon. Another object of the invention is to
An object of the present invention is to provide a three-dimensional display device with excellent portability.

[Means for solving problems]

A three-dimensional display device according to the present invention includes a liquid crystal cell in which twisted oriented nematic liquid crystal is sandwiched between electrode substrates disposed facing each other, a polarizing plate disposed on one outer surface of the liquid crystal cell, and a polarizing plate disposed on one outer surface of the liquid crystal cell. A display device disposed on an outer surface that alternately displays information at shifted positions, and side-lit glasses having a pair of polarizing plates disposed on the other outer surface of the liquid crystal cell, and a display electrode of the liquid crystal cell, It is formed to have a pattern shape corresponding to the scanning line of the display device.

[Effect]

In the present invention, the rubbing direction of the liquid crystal alignment film on the electrode substrate facing the polarizing plate of the liquid crystal cell (liquid crystal molecule alignment method)
The polarization axes or light absorption axes of the polarizing plates are made to match or intersect with each other, and the polarization axes or light absorption axes of the left and right polarizing plates of the polarized glasses are made to intersect with each other, and one of the polarization axes of the polarizing plate is Alternatively, by aligning the absorption axis in the same direction, information for the left eye and for the right eye can be displayed on the display device with their positions alternately shifted for each scanning line, and the on/off states of the polarizing plate and the liquid crystal cell can be displayed on the display device. The settings regulate the direction of the light, and the polarized glasses provide information for the left eye only.
Information for the right eye is recognized only by the right eye.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a sectional view of essential parts showing an embodiment of a three-dimensional display device according to the present invention. In the same figure, on the opposing surfaces of the upper and lower substrates 1 and 2 extending from the transparent glass plate, there is an upper electrode 3 made of a transparent conductive film. Lower electrodes 4 are formed to face each other. In this case, the upper electrodes 3 are formed in stripes on the soil substrate 1 every one or every two scanning lines of a cathode ray tube, which will be described later. Also, above these,
After the lower electrodes 3 and 4 are formed, and on the opposite surface of the lower substrate 1゜2, an M machine resin film is deposited and then the surface is rubbed in a certain direction with a cloth, so-called rubbing. The treated liquid crystal alignment films 5 and 6 are formed and arranged so that their rubbing directions (liquid crystal molecule alignment directions) intersect with each other at approximately 90 degrees. Furthermore, the upper and lower substrates 1.6 on which upper and lower electrodes 3, 4 and liquid crystal alignment films 5.6 are formed, respectively.
2 are separated by a predetermined distance from each other and their peripheries are sealed by a sealing material T containing a spacer, and in the gap there is a A liquid crystal cell 10 is constructed in which the liquid crystal molecules are arranged in a spiral structure in which the liquid crystal molecules are rotated approximately 90 degrees between the upper and lower electrodes 3 and 4. Furthermore, on the back side of this liquid crystal cell 10, there is a polarization axis or a light absorption axis that is in the same direction as the rubbing direction of the liquid crystal alignment film 6 formed on the lower substrate 2 of the liquid crystal cell 1 degree or intersects with the rubbing direction at about 9 degrees. polarizing plate 20 having
is located. Moreover, on the outer surface of this polarizing plate 20,
A phosphor film 22 is formed on the inner surface of the panel glass 2-1,
A cathode ray tube 30 with a shadow mask 23 disposed facing the fluorescent body EA22 is disposed.

Further, on the front side of the liquid crystal cell 10, there are polarized glasses 40 having a left polarizing plate 31 and a right polarizing plate 32 whose polarization axes or light absorption axes cross each other at approximately 90 degrees on the left and right eye sides. will be placed. In this case, the left polarizing plate 31 of the polarized glasses 40 is set in substantially the same direction as the polarization axis or light absorption axis of the polarizing plate 20.

FIG. 2 is a perspective view illustrating the relationship between the rubbing direction and the axis of the polarizing plate of the three-dimensional display device explained in FIG. 1. In the figure, 5A is the 2-pin direction of the liquid crystal alignment film 5 formed on the upper electrode substrate 1, 6A is the 2-pin direction of the liquid crystal alignment film 6 formed on the lower electrode substrate 2, and 10A is the twist of the liquid crystal molecules. Direction and angle, 2QA indicates the polarization m or light absorption axis of the polarizing plate 20, 31 indicates the polarization axis or light absorption axis of the left polarizing plate 31, and 32A indicates the polarization axis or light absorption axis of the right polarizing plate 32. It is.

In such a configuration, the light emitted from the cathode ray tube 30 is
The light is aligned in a certain direction by the polarizing plate 20, and the polarization axis or light absorption axis 20A and the rubbing direction 6A of the liquid crystal alignment film 6 on the lower substrate 2 of the liquid crystal cell 10 are aligned or intersect with each other. Therefore, when the liquid crystal cell 10 is off, the light rotates and comes out. Plus 40 polarized glasses
The polarization axes or light absorption axes 31A and 32A cross each other on the left and right sides, and one of them coincides with the direction 20A of the polarizing plate 20, so when the liquid crystal cell 10 is on, the left polarizing plate 3
The light passes through 1.

The operation will be explained in detail below with reference to FIG. First, as shown in FIG. 3A, on the display surface of the cathode ray tube 30, left eye information AL and right eye information AR are displayed shifted left and right and alternately for each scanning line. These display lights are aligned in a fixed direction by a polarizing plate 20 and then enter the liquid crystal cell 10, as shown in FIG. Here, the lower electrode 4 of the liquid crystal cell 10 is formed on the entire surface of the lower substrate 2, and the upper electrode 3 receives left eye information AL and right eye information A on the cathode ray tube 30.

The striped upper electrode 3 is formed in a stripe shape corresponding to the scanning line, and is always set in an on state. Therefore, in the ON part of the upper electrode 3, the polarizing plate 2
The light aligned at 0 is directly transmitted, and the polarization axis or light absorption axis 31A of the left eye polarizing plate 31 of the polarized glasses 40
This almost coincides with the information AL, which means that this information AL is recognized only from the left eye. In addition, as shown in the same figure (Fig. The light rotates by 90 degrees and is transmitted. For this reason, the polarized glasses 400
An element that almost coincides with the polarization axis or light absorption axis 32A of the stone polarizing plate 32 is obtained, and the information AR is only from the right eye &! will be recognized. That is, the left eye information AL and the right eye information A are displayed alternately on the cathode ray 'i#3G at shifted positions, and the positional shift is detected and recognized only by the left eye or the right eye. .

In the above-mentioned embodiment, a case was explained in which a cathode 41 tube was used as a display device for displaying information, but the present invention is not limited to this, and the EL, P
It goes without saying that the same effect as described above can be obtained even if a display device consisting of a DP, VFD, LED, etc. is used.

〔Effect of the invention〕

As described above, according to the present invention, information for the left eye and for the right eye are displayed on the display device with their positions shifted alternately, and the information is displayed on the display device by changing the on/off state of the polarizing plate and the liquid crystal cell. ,
By regulating the direction of light and using polarized glasses, information for the left eye is perceived only by the left eye, and information for the right eye is perceived only by the right eye, thereby creating a three-dimensional image without flicker.
It can be made to understand. In addition, polarized glasses have only a polarizing axis or a light absorption axis: a pair of polarizing plates that intersect with each other, and can be used without a cord, so they are highly portable. Furthermore, turn on the polarizing plate and liquid crystal cell.

When set to the off state, the direction of the light is regulated and polarized glasses allow individual information to be obtained for the left and right eyes, so a polarizing plate and liquid crystal cell are installed in front of the display device. It has extremely excellent effects such as being able to obtain stereoscopic images with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts showing a three-dimensional display device according to an embodiment of the present invention. The second factor is a perspective view showing the relationship between the 2-pin direction in FIG. ), (
b) and (c) are diagrams illustrating the operation of the stereoscopic display device according to the present invention. DESCRIPTION OF SYMBOLS 1... Upper substrate, 2... Lower substrate, 3... Φ upper electrode, 4... Lower electrode, 5, 6... Liquid crystal alignment film, 7
φ... Seal material, 8... Liquid crystal, 10... Liquid crystal cell, 20... Polarizing plate, 21... Panel glass, 22... Fluorescent film, 23... ...Yu shadow mask, 30...Cathode ray tube, 31...Left polarizing plate, 32
... Right polarizing plate, 40 φ... Polarized glasses.

Claims (1)

[Claims] A liquid crystal cell consisting of a twisted oriented nematic liquid crystal sandwiched between electrode substrates arranged opposite to each other, a polarizing plate arranged on one outer surface of this liquid crystal cell, and a polarizing plate arranged on the outer surface of this polarizing plate and arranged to store information. The display device includes a display device that alternately displays images by shifting them, and polarized glasses having a pair of polarizing plates arranged on the other outer surface of the liquid crystal cell, and the display electrodes of the liquid crystal cell correspond to the scanning lines of the display device. A three-dimensional display device characterized by being formed with a pattern shape.