JPS63274918A - Liquid crystal stereoscopic display device - Google Patents

Abstract

PURPOSE:To improve portability by arranging a polarizing plate on the external surface of a 1st liquid crystal cell, arranging oppositely a 2nd liquid crystal cell which contains nematic liquid crystal on the external surface of the polarizing plate, and arranging polarizing spectacles on the external surface of the 2nd liquid crystal cell. CONSTITUTION:An upper electrode 3 and a lower electrode 4, and liquid crystal-oriented films 5 and 6 are formed on the opposite surfaces of upper and lower substrates 1 and 2, which are sealed with a seal material 7; and liquid crystal 8 is charged in their gap to form the 1st liquid crystal cell 10. The polarizing plate 20 consisting of upper and lower polarizing plates 11 and 12 is arrange on the outer surface of the cell 10. A liquid crystal cell 30 is arranged on the top surface of the polarizing plate 11. The cell 30 is formed by charging nematic liquid crystal 28 which provides torsional orientation between the electrode substrates. Further, the polarizing spectacles 40 which have a left polarizing plate 31 and a right polarizing plate 32 are arranged on the external surface of the cell 30. Thus, pieces of information for the right and left eyes are displayed on the cell 10 and pieces of information for the right and left eyes are separated by changing the axes of polarization, so that the information for the left eye is viewed with the left eye and the information for the right eye is viewed with the right eye.

Description

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

[Conventional technology]

Conventionally, as this type of 3D display device, CRT
The ■Φ method has been put into practical use, in which WJ images for the right eye and the left eye are alternately displayed on the (Cathode-Ra)'Tube), and synchronized shutter glasses are used to visualize the images in 3D. .

[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 and lacks portability.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a liquid crystal stereoscopic display device with excellent portability.

[Means to resolve the problem]

A liquid crystal stereoscopic display device according to the present invention includes: a first liquid crystal cell having a liquid crystal sandwiched between electrode substrates disposed facing each other; a polarizing plate disposed on at least one outer surface of the first liquid crystal cell; a second liquid crystal cell disposed on the outer surface of the polarizing plate and sandwiching twisted oriented nematic liquid crystal between electrode substrates disposed facing each other; and a pair of polarized light disposed on the outer surface of the second liquid crystal cell. and polarized glasses having a plate.

[Effect]

In the present invention, the first liquid crystal cell displays information for the left eye and the right eye, and the second liquid crystal cell separates the information into left eye information and right eye information by changing the polarization axis or light absorption axis. death,
Polarized glasses allow the left eye to recognize information for the left eye, and the right eye to recognize information for 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 for explaining an embodiment of a liquid crystal stereoscopic display device according to the present invention. In the same figure, upper electrodes 3.2 made of transparent conductive films are disposed on opposing surfaces of upper and lower substrates 1.2 made of transparent glass plates. The lower electrodes 4 are arranged in a matrix in a direction that intersects with each other. Moreover, these upper electrodes 3. After forming an organic resin film on each of the opposing surfaces of the lower substrate 1.2 on which the lower electrodes 4 are formed, a so-called rubbing treatment is applied, in which the surface is rubbed in a certain direction with a cloth or the like. The rubbing directions (liquid crystal molecule alignment directions) of the liquid crystal alignment films 5 and 6 are approximately 90 degrees centigrade from each other.
They are arranged to cross each other. Furthermore, these upper electrodes 3. The upper and lower substrates 1 and 2, on which the lower electrode 4 and the liquid crystal alignment films 5 and 6 are respectively formed, are separated by a predetermined distance from each other and their peripheral parts are sealed with a sealing material 7 containing a spacer, and the gap between them is sealed. A twisted nematic liquid crystal 8 having positive dielectric anisotropy is sealed in the signal electrode 3 . A first liquid crystal cell 10 is constructed in which molecules are arranged in a spiral structure rotating approximately 90 degrees between scanning electrodes 4. Further, on the outer surface of the first liquid crystal cell 10, a polarizing plate 20 consisting of a pair of upper and lower polarizing plates 11 and 12 whose polarization axes or light absorption axes intersect with each other at approximately 90 degrees is disposed. The polarization axes or light absorption axes of these upper and lower polarizing plates 11.12 substantially coincide with the rubbing directions of the liquid crystal alignment films 5 and 6, which are arranged to face each other via the upper and lower substrates 1.2, respectively. They are arranged so that they intersect at almost 90 degrees. Further, on the upper surface of the upper polarizing plate 11, a second liquid crystal cell 30 having basically the same configuration as the first liquid crystal cell 10 is formed using the same forming means as the first liquid crystal cell 10. There is. That is, the top consists of a translucent glass plate.

On the opposing surfaces of the lower substrates 21 and 22, there are upper electrodes 23 and 23 made of transparent conductive films. The lower electrodes 24 are arranged opposite to each other, and the upper electrodes 2
3 are arranged in a stripe pattern. Moreover, these upper electrodes 23. On the respective opposing surfaces of the lower substrates 21 and 22, on which the lower electrodes 24 are formed, liquid crystal alignment films 25 and 26, which are formed by adhering an organic resin film and subjected to rubbing treatment in a certain direction, are arranged. The upper and lower substrates 21 are arranged so as to cross each other at approximately 90 degrees.
．． The peripheral portion between the upper electrodes 23.22 is sealed with a sealing material 2T containing a spacer, and twisted nematic liquid crystal 28 having positive dielectric anisotropy is sealed in the gap between the upper electrodes 23.22. A second liquid crystal cell 30 is constructed in which molecules are arranged in a spiral structure rotating approximately 90 degrees between the lower electrodes 24.

In this case, the rubbing direction of the liquid crystal alignment film 26 on the lower substrate 22 of the second liquid crystal cell 30 and the polarization axis or light absorption axis of the upper polarizing plate 11 described above are set in approximately the same direction or approximately 90 degrees. are crossed. Also, 'this second
Polarized glasses 40 are disposed in front of the liquid crystal cell 30, and include 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. Ru. In this case, the left polarizing plate 31 of the polarized glasses 40 is
The right polarizing plate 32 is set in substantially the same direction as the polarizing axis or light absorption axis of the upper polarizing plate 11, and the right polarizing plate 32 is set in substantially the same direction as the polarizing axis or light absorption axis of the lower polarizing plate 12.

FIG. 2 is a perspective view illustrating the relationship between the rubbing direction and the axis of the polarizing plate of the liquid crystal stereoscopic display device explained in FIG. 1. In the figure, 5A is the rubbing direction of the liquid crystal alignment film 5 formed on the upper electrode substrate 1 of the first liquid crystal cell 10;
6A is the rubbing direction of the liquid crystal alignment film 6 formed on the lower electrode substrate 2, and these rubbing directions 5A, 6A
are crossed at approximately 90 degrees to each other. 11A is the polarization axis or light absorption axis of the upper polarizing plate 11, and 12A is the lower polarizing plate 12.
These axes 11A are polarization axes or optical absorption axes of .

The rubbing directions 12A are substantially in the same direction as the above-mentioned rubbing directions 5A and 6A, and intersect with each other at approximately 90 degrees. 25A is the rubbing direction of the liquid crystal alignment film 25 formed on the upper electrode substrate 21 of the second liquid crystal cell 30, and 26A is the rubbing direction of the liquid crystal alignment film 26 formed on the lower electrode substrate 22. 2 ping direction 25A,
26A intersect each other at approximately 90 degrees. Also, 3
1A is the polarization axis or light absorption axis of the left polarizing plate 31 of the polarized glasses 40, and 32A is the polarization axis or light absorption axis of the right polarizing plate 32, and these axes 31A and 32A intersect each other at approximately 90 degrees. and the polarization axis or light absorption axis 11A of the upper polarizing plate 11 and the polarization axis or light absorption axis 1 of the lower polarizing plate 12.
2A and almost identical to each other.

In the liquid crystal 3D display device configured in this way, the lower first liquid crystal cell 1o has an IJ sock in which the upper electrode 3 and the lower electrode 4 are arranged in a direction that intersects with each other, as shown in a plan view in FIG. The polarizing axis or optical absorption axis 11A of the upper polarizing plate 11 and the polarizing axis or optical absorption axis 12A of the lower polarizing plate 12 are arranged at approximately 90 degrees with respect to the second liquid crystal cell 1o. are crossed. On the other hand, the second liquid crystal cell 30 in the upper layer is formed so that the pixel electrode 23 and the common electrode 24 are arranged in a stripe pattern facing each other, as shown in the plan view in FIG. Rubbing direction 2
1A and the rubbing direction 22A of the lower substrate 22 intersect at approximately 90 degrees. In such a configuration, a predetermined voltage is applied between the upper electrode 23 and the lower electrode 24 of the second liquid crystal cell 3o in the upper layer, and for example, the upper electrode 23b,
23d and non-selecting the upper electrodes 23c and 23e, the optical properties of the liquid crystal 28 are changed as shown in FIG. 5, and the light incident on this liquid crystal portion is transmitted. Turn on and off the upper electrode 23 one by one,
Information for the left eye and information for the right eye are alternately displayed on polarized glasses 40. In addition, in FIG. 5, the upper electrode 23a.

23c and 23e indicate on and off states. In addition, a predetermined voltage is applied between the upper electrode 3 and the lower electrode 4 of the lower layer first liquid crystal cell 1G, and, for example, the upper electrode 3
b, 3et-select other upper electrodes 3a, 3e.

By deselecting 3d, the optical properties of the liquid crystal 8 are changed as shown in FIG. 5, and required information is displayed on the upper electrode 3 by transmitting light incident on this liquid crystal portion. In such a state, when the first liquid crystal cell 10 in the lower layer is on, the transmitted light is transmitted to the second liquid crystal cell in the upper layer in a dark state due to the combination K with the polarizing plate 20, as shown in FIG. into the liquid crystal cell 30. For this reason, the dark state is maintained regardless of whether the second liquid crystal cell 30 in the upper layer is on or off, but when the second liquid crystal cell 3o in the upper layer is on, the information is for the left eye side of the polarized glasses 40. If it is off, the information will be from the right eye side. On the other hand, when the upper electrodes 3m, 3c, and 3d of the lower first liquid crystal cell 10 are off, the transmitted light is rotated and transmitted by the combination with the polarizing plate 20. Furthermore, when the second liquid crystal cell 30 in the upper layer is off, the light is further rotated by 90 degrees and transmitted, and the bright state is recognized as information for the right eye, and when the second liquid crystal cell 30 in the upper layer is on, the light is rotated by 90 degrees. First, the bright state is recognized in the state of the information for the left eye. In this way, by constantly viewing left-eye information for the left eye and viewing right-eye information for the right eye through the polarized glasses 40, it is possible to recognize a stereoscopic image t-.

FIG. 7 is a cross-sectional view showing another embodiment of the liquid crystal stereoscopic display device according to the present invention, and the same parts as in the previous figures are given the same reference numerals. This figure differs from FIG. 1 in that the upper electrode 3' on the upper substrate 21 constituting the second liquid crystal cell 3o is formed over the entire surface of the upper substrate 21.

In such a configuration, while applying a predetermined voltage between the upper electrode 3 and the lower electrode 4 of the first liquid crystal cell 10,
As shown in FIG. 8 (Jl), for example, the upper electrodes 3a and 3c are unselected and turned off, and the upper electrode 3b is turned off.

3d is selected and turned on, the upper electrodes 3a and 3c in the off state are connected to the upper and lower polarizing plates 11 as shown in the same figure.
．． Light is transmitted through the combination of the 12 polarization axes or light absorption axes 11A, 12A and the rubbing directions 5A, 6A of the electrode substrates 1, 2. Furthermore, as shown in FIG. 2A, when the second liquid crystal cell 30 is in the off state, the light rotates within the second liquid crystal cell 30 and comes out twisted at approximately 90 degrees. For this reason, as shown in Figure (e), the information person's line AIL+Ae is recognized from the right eye because it is in almost the same direction as the polarization axis or light absorption axis 32A of the right polarizing plate 32 of the polarized glasses 4G. . In addition, since liquid crystal molecules are rising in the upper electrodes 3b and 3d of the first liquid crystal cell 10 in the on state, the upper and lower polarizing plates 11 and 12 are in a crossed nicol state, and no light is transmitted. It becomes the dark side. This state is shown in the same figure (
If it rains as a dot in b), the part P a + P c will be obtained as information for the right eye. Next, as shown in FIG. 9(a), the upper electrodes 3a, 3c of the first cell 10
is in the on state, and when the upper electrodes 3b and 3d are in the off state, the behavior of light in the first liquid crystal cell 10 is as follows.
As in the case described above, when the upper electrodes 3b and 3d are in the OFF state, light is transmitted 9, but when the upper electrodes 3a and 3c are in the ON state, it is blocked. At this time, by turning on the second liquid crystal cell 30, the light transmitted through the upper electrodes 3b and 3d is not polarized by the second liquid crystal cell 30, that is, as shown in FIG. Light in substantially the same direction as the polarization axis or light absorption axis 31A of the left polarizing plate 31 of 40 is transmitted, and the information A line A b r A
d will be recognized from the left eye. If this state is expressed as a K dot (FIG. 4(b)), the Pb and Pd portions will be obtained as information for the left eye. According to such a configuration, it is possible to recognize a three-dimensional image without any flicker phenomenon.

Note that in the embodiment described above, the first liquid crystal cell 10
Although the case where the polarizing plates 11 and 12 are arranged on the outer surfaces of both sides has been described, the present invention is not limited to this.
It goes without saying that even if it is placed on either one of the outer surfaces of the first liquid crystal cell 10, the same effect as described above can be obtained.

Furthermore, in the embodiment described above, the first liquid crystal cell 10
Although a nematic liquid crystal cell with negative dielectric anisotropy was used, a DS type liquid crystal cell applying a dynamic scattering effect may also be used.
A similar effect can also be obtained with the GH method, in which multicolor dyes are mixed into the liquid crystal, and by applying an electric field to the liquid crystal molecules, the direction of alignment can be determined, and the orientation of the dye molecules is changed to change the display color. Of course. In this case, the lower polarizing plate 12 becomes unnecessary.

〔Effect of the invention〕

As explained above, according to the present invention, the first liquid crystal cell displays information for the left eye and the right eye, and the second liquid crystal cell displays the polarization axis of the information for the left eye and the information for the right eye. By changing the light absorption axis and separating the images, the information for the left eye can be viewed with the left eye and the information for the right eye can be viewed with the right eye using polarized glasses, making it possible to recognize the image three-dimensionally. In addition, polarized glasses have excellent portability because they only have polarizing plates whose polarization axes or light absorption axes intersect with each other, and can be used without a cord. Furthermore, since the distance between the polarized glasses and the second liquid crystal cell can be increased, many people can recognize 3D images by wearing polarized glasses, regardless of the distance and the number of people. Extremely excellent effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts showing an embodiment of a liquid crystal stereoscopic display device according to the present invention, FIG. 2 is a perspective view of FIG. 1, and FIG.
FIG. 4 is a plan view of the second liquid crystal cell, FIG. 5 is a cross-sectional view of the main parts explaining the operation of the liquid crystal stereoscopic display device, and FIG. 6 is a similar plan view of the liquid crystal stereoscopic display device. FIG. 7 is a sectional view showing another embodiment of the liquid crystal stereoscopic display device according to the present invention, and FIGS. 8 and 9 are plan views explaining the operation of the liquid crystal stereoscopic display device of FIG. 7. FIG. 1... φ upper substrate, 2... lower substrate, 3... upper electrode, 4... φ lower electrode, 5, 6... liquid crystal alignment film, 7
... Seal material, 8 ... Liquid crystal, 10 ... Φ 1st
liquid crystal cell, 11--upper polarizing plate, 12--lower polarizing plate, 20--polarizing plate, 21--upper substrate, 22
...lower substrate, 23.23'--upper electrode, 24.
... lower electrode, 25.26 ... liquid crystal alignment film, 27.
... Seal material, 28 ... Liquid crystal, 30 ... Second
liquid crystal cell, 31... left polarizing plate, 32... right polarizing plate, 40... polarized glasses.

Claims (1)

[Claims] A first structure in which a liquid crystal is sandwiched between electrode substrates arranged facing each other.
A nematic liquid crystal having twisted orientation is sandwiched between a liquid crystal cell, a polarizing plate disposed on at least one outer surface of the first liquid crystal cell, and electrode substrates disposed on the outer surface of the polarizing plate and facing each other. 1. A liquid crystal stereoscopic display device comprising: a second liquid crystal cell; and polarized glasses having a pair of polarizing plates disposed on the outer surface of the second liquid crystal cell.