JPH0223A - Liquid crystal optical device and stereoscopic video device equipped with the same - Google Patents

Abstract

PURPOSE:To obtain a high contrast ratio by providing an optical compensating layer which compensates optical anisotropy remaining when an electrooptic cell is placed in a light shield state in addition to the electrooptic liquid crystal cell. CONSTITUTION:The orienting films 105 and 106 of the upper and lower substrates of the electrooptic liquid crystal cell 001 are rubbed as shown by arrows 141 and 142 for orientation, and the liquid crystal has pi orientation in the cell. The retardation value DELTAnd of the liquid crystal layer of this cell is 50nm when light is cut off and the contrast ratio in the absence of the optical compensating layer is 1:8, but the retardation value when an optical compensating layer 110 whose DELTAnd is about 50nm is stuck is about 0nm when the light is cut off and the contrast ratio is >=(1:100) or >=10 times as large as that before the optical compensating layer is inserted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a liquid crystal optical device that controls the amount of transmitted light, and the structure of a stereoscopic image device equipped with the liquid crystal optical device.

[Conventional technology]

The structure of a conventional liquid crystal optical device is, for example, when using the twisted nematic effect, polarizing plates are placed on both sides of a liquid crystal cell in which a nematic liquid crystal layer twisted by 90 inches is sandwiched between a pair of substrates having electrodes, and the polarizing axes of the polarizing plates are aligned with each other. is vertical, and
The polarization axis is arranged so that it matches the direction of the director on the substrate surface, and light is blocked by applying voltage to the liquid crystal layer through electrodes and aligning the liquid crystal homeotropically. was common.

[Problem to be solved by the invention]

However, in the conventional technology described above, even if a voltage is applied to the liquid crystal layer, if the voltage is not high enough, the liquid crystal does not have an ideal homeotropic alignment, but is oriented in a somewhat tilted state. There was a problem in that light leakage occurred in the light-blocking state, resulting in a decrease in contrast ratio.

Therefore, the present invention is intended to solve these problems, and its purpose is to provide a liquid crystal optical device with a high contrast ratio.

In addition, when a stereoscopic imaging device using a conventional liquid crystal optical device takes video, images taken simultaneously at the positions of both human eyes using a camera for the left eye and a camera for the right eye are displayed on a CRT and a screen. Images for the left and right eyes are projected alternately, and the images are separated into images for the left and right eyes by a liquid crystal optical device installed just before the left and right eyes. When using conventional liquid crystal optical devices, the image from the other eye can be seen, albeit slightly, due to insufficient light shielding. The problem was that the image appeared double, making it impossible to obtain a sufficient three-dimensional image.

[Means for Solving the Problems] The liquid crystal optical device of the present invention has a liquid crystal layer sandwiched between a pair of opposing substrates having electrodes on the inner surface, and controls transmission and blocking of light by the electro-optic effect of the liquid crystal layer. In a liquid crystal optical device having an electro-optic liquid crystal cell, in addition to the electro-optic liquid crystal cell, an optical compensation having optical anisotropy for compensating for optical anisotropy that remains when the electro-optic cell is brought into a light blocking state. A three-dimensional image device having such a liquid crystal optical device is constructed, which is characterized in that the liquid crystal optical device is provided with a layer.

[Effect]

According to the above structure of the present invention, even if a perfect homeotropic alignment cannot be achieved and the liquid crystal molecules have a somewhat tilted twisted structure due to reasons such as not being able to apply a sufficient voltage to the liquid crystal during light interruption. By providing an optical compensation layer and returning the polarization state of the light that has passed through the liquid crystal cell to a state close to the linearly polarized light before entering the liquid crystal cell, it is possible to obtain optical properties close to those of ideal homeotropic alignment. ,
By reducing the transmittance when light is blocked, it is possible to obtain a liquid crystal optical device with a high contrast ratio.

〔Example〕

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

Embodiment 1 FIG. 1 is a cross-sectional view of a liquid crystal optical device according to an embodiment of the present invention, in which 104 is a liquid crystal layer, 131 and 132 are upper and lower polarizing plates, respectively, and 110 is an optical compensation layer, which is uniaxial. Stretched film is used. Reference numerals 105 and 106 are alignment films for the upper and lower substrates of the electro-optical liquid crystal cell 001, and alignment treatment is performed by rubbing in the directions of arrows 141 and 142, so that the liquid crystal is π-aligned within the cell. There is.

FIG. 2 is a diagram showing the relationship among the polarizing axes of the upper and lower polarizing plates, the direction of the director of liquid crystal molecules, and the optical axis of the uniaxially stretched film. 147 and 148 are the polarization axes of the upper and lower polarizing plates, respectively, and form an angle of 90@. Reference numeral 150 indicates the direction of the liquid crystal director, which forms an angle of 45° with the polarization axis of the upper and lower polarizing plates. 149 is the direction of the optical axis of the uniaxially stretched film, and 150 is the direction of the director of the liquid crystal.
It is vertical.

The thickness of the liquid crystal layer of this cell was Δnd=50 nm when light was blocked, and the contrast ratio when there was no optical compensation layer was 1:8.

However, when the optical compensation layer 110 with a Δnd of about 50 nm is inserted, the glue turbulence value when the liquid crystal layer and the optical compensation layer 110 are combined becomes about Onm when light is blocked, and the contrast ratio is not less than 13,100. Compared to before inserting the optical compensation layer, a contrast ratio of 10 times or more was obtained.

Example 2 FIG. 3 is a cross-sectional view of a liquid crystal optical device according to an example of the present invention, in which an optical compensation liquid crystal cell 002 is used as an optical compensation layer instead of the film in Example 1. 14
3 and 144 indicate the orientation treatment directions of the upper and lower substrates of the compensation liquid crystal cell, and the liquid crystal layer 114 is homogeneously aligned within the cell. Further, as in the first embodiment, the polarization axes of the upper polarizing plate 131 and the lower polarizing plate 132 form an angle of 90°, and form an angle of 45° with the director direction of the liquid crystal layer 104 and the liquid crystal layer 114. The directions of the director of the liquid crystal layer 114 and the direction of the director of the liquid crystal layer 114 are perpendicular to each other. The retardation value of the optical compensation liquid crystal cell 002 is about 50 nm, and as in Example 1, 1: Z
A contrast ratio of oo or more was obtained.

Embodiment 3 FIG. 4 is a sectional view of a liquid crystal optical device according to an embodiment of the present invention, in which an optical compensation liquid crystal cell 002 is used as an optical compensation layer, and 145 and 146 are upper substrates of the compensation liquid crystal cell. , indicates the orientation treatment direction of each lower substrate, and indicates the orientation treatment direction of each of the lower substrates.
24 has a π orientation within the cell, and the cell gap is equal to that of the electro-optic liquid crystal cell 001. Further, the relationships among the polarization axes of the upper and lower polarizing plates, the direction of the director of the liquid crystal layer 104, and the direction of the director of the liquid crystal layer 1144 are the same as in the second embodiment. An alternating current voltage is always applied to the optical compensation liquid crystal cell 002, and the applied voltage is equal to the voltage applied when the electro-optical liquid crystal cell is in a light-blocking state. In the liquid crystal optical device having this structure, the retardation values of the electro-optical liquid crystal cell 001 and the optical compensation liquid crystal cell 002 are equal in the light-blocking state, and the directions of their respective directors are orthogonal, so that When the electro-optical liquid crystal cell 001 and the optical compensation liquid crystal cell 002 are combined and the terpsion value is always O regardless of the applied voltage when light is cut off,
nm, the amount of transmitted light is very small, and Example 2
A similarly high contrast ratio was obtained.

Example 4 The uniaxially stretched film used as the optical compensation layer in the above Example 1 and the optical compensation liquid crystal cell used as the optical compensation layer in Example 2 were used in the following manner: However, it has been recognized that sufficient effects can be obtained even when there is a turbulence corresponding to when no voltage is applied.

Example 5 FIG. 5 is a cross-sectional view of a liquid crystal optical device which is an example of the present invention, 231 and 232 are an upper polarizing plate and a lower polarizing plate, respectively, 210 is an optical compensation layer, and a uniaxially stretched film is used. There is. Reference numerals 205 and 206 indicate alignment films for the upper and lower substrates, and the alignment process is performed by rubbing in the alignment process directions 241 and 242t indicated by arrows. 20
4 is a liquid crystal layer whose twist angle is 270°.

FIG. 6 is a diagram showing the relationship among the polarization axes of the upper and lower polarizing plates, the director direction of liquid crystal molecules, the twist direction of the liquid crystal, and the optical axis of the uniaxially stretched film. 247 and 248 are the polarization axes of the upper and lower polarizing plates, respectively, and form an angle of 90°. The liquid crystal layer 204 is twisted in the direction of arrow 249 from the upper substrate surface to the lower substrate surface. 250 is the direction of the optical axis of the uniaxially stretched film, which forms an angle of 45° with the polarizing axes of the upper and lower polarizing plates.

In this liquid crystal cell, the contrast ratio without the optical compensation layer was 1:20. However, Δnd is about 3
When the optical compensation layer 210 with a thickness of 0 nm was inserted, a contrast ratio of 1280 or more was obtained, and a contrast ratio of 4 times or more was obtained compared to before the optical compensation layer was inserted.

Example 6 FIG. 7 is a cross-sectional view of a liquid crystal optical device according to an example of the present invention, in which an optical compensation liquid crystal cell 002 is used as an optical compensation layer instead of the film in Example 5. 24
3 and 244 indicate the orientation treatment directions of the upper and lower substrates of the optical compensation liquid crystal cell, and the liquid crystal layer 224 is homogeneously aligned within the cell. Further, as in Example 5, the polarization axes of the upper polarizing plate and the lower polarizing plate form an angle of 90°, the twist angle of the liquid crystal layer 204 is 2701, and the direction of the director of the liquid crystal layer 224 in the optical compensation liquid crystal cell is , and the polarization axes of the upper and lower polarizing plates, respectively, forming an angle of 45°. As a result, a contrast ratio of 1:80 or more in Example 5 was obtained.

Embodiment 7 FIG. 8 is a sectional view of a liquid crystal optical device according to an embodiment of the present invention, in which an optical compensation liquid crystal cell 002 is used as an optical compensation layer. Reference numerals 245 and 248 indicate the alignment directions of the upper and lower substrates of the compensation liquid crystal cell, and both the electro-optical liquid crystal cell 001 and the optical compensation liquid crystal cell 002 have a twist angle of 2701 and an equal cell gap. Further, FIG. 9 is a diagram showing the polarization axes of the upper and lower polarizing plates and the twist direction of the liquid crystal, where 249 is the twist direction of the liquid crystal layer 204 of the electro-optic liquid crystal cell, and 251 is the twist direction of the liquid crystal layer 224 of the liquid crystal cell for optical compensation. The twist direction is shown, and the twist is from the upper substrate to the lower substrate in the direction of the arrow. An alternating current voltage is always applied to the optical compensation liquid crystal cell 002, and the applied voltage is equal to the voltage applied when the electro-optical liquid crystal cell is in a light-blocking state. In a liquid crystal optical device with this structure, in the light-blocking state, the transmittance can be made extremely small regardless of the applied voltage, and the contrast ratio is 1:1.
It became very high, over 00.

Example 8 In Example 5.6, the twist angle of the liquid crystal 204 was 2706, but similar effects were obtained when the twist angle was 90@ or 4500. Also, the twist angle is not necessarily 90
It doesn't have to be ``, 270'', or 450@,
90°±10", 270°±15@, 450°±15"
It is recognized that a similar effect can be obtained within the range of .

Example 9 The above Examples 1 to 8 are effective not only in improving the contrast ratio but also in lowering the driving voltage, and by inserting an optical compensation layer, the driving voltage can be reduced to about half of the conventional one. We were also able to obtain a higher contrast ratio than before.

Embodiment 10 FIG. 10 is a sectional view of a liquid crystal optical device showing an embodiment of the present invention, where 001 is an electro-optic liquid crystal cell and 002 is an optical compensation liquid crystal cell. 305 and 306 are alignment films of the electro-optical liquid crystal cell, and 315 and 316 are alignment films of the upper and lower substrates of the optical compensation liquid crystal cell. Further, the surfaces of 305 and 315 are subjected to alignment treatment by rubbing in the direction of alignment treatment indicated by the arrow, and the directions are orthogonal to each other. Also, 3
04.314 is a liquid crystal layer exhibiting ferroelectricity, the same type is used, and Δn=0.13. The cell gap of both the electro-optical liquid crystal cell 001 and the optical compensation liquid crystal cell 002 is 2 μm. 321 and 322 are upper and lower polarizing plates, and their respective polarization axes are perpendicular to each other, and the polarizing plates 32
The polarization axis of 1 substantially coincides with the direction of the director of the liquid crystal layer 314. FIG. 11 is a diagram showing the temperature dependence of the tilt angle of the ferroelectric liquid crystal used in the present invention and the contrast ratio of the liquid crystal optical device of this example. It's getting smaller.

FIG. 12 is a diagram showing the relationship among the alignment processing direction, director direction, and polarization axis of the polarizing plate in the liquid crystal optical device of this example. 341 is the direction of the polarization axis of the upper polarizing plate, 342 is the direction of the polarization axis of the lower polarizing plate, -331 is the direction of the electro-optic liquid crystal cell, and 332 is the orientation treatment direction of the optical compensation liquid crystal cell, which is rubbed in the direction of the arrow.

Reference numeral 347 indicates the direction of the director of the optical compensation liquid crystal cell, and the entire cell is aligned in this direction. 345.346
are the directions of the director in two bistable states of the electro-optical liquid crystal cell, and when the director faces the direction 345, the direction 34 of the director of the optical compensation liquid crystal cell
7 and 90 degrees, and the electro-optical liquid crystal cell and the optical compensation liquid crystal cell are combined, and the terpsion value is almost On.
m, so light is sufficiently blocked even though the direction 345 of the director is deviated from the direction 342 of the polarization axis of the lower polarizing plate.

20℃ without the optical compensation liquid crystal cell for this liquid crystal cell
The contrast ratio was approximately 1=20, whereas the liquid crystal optical device of this example obtained a contrast ratio of 1:50 or more. Furthermore, in the liquid crystal optical device of this embodiment, the temperature dependence of the contrast ratio is eliminated, and as shown in FIG. In contrast, in the liquid crystal optical device of this example, the contrast ratio has almost no temperature dependence, and the contrast ratio is -10°C to 50°C.
A contrast ratio of 1:40 or more was always obtained in the temperature range of .degree.

Example 11 In Example 10 above, an optical compensation liquid crystal cell is used as the optical compensation layer, but the contrast ratio can also be improved by using an optical compensation liquid crystal cell having a uniaxially stretched film and a homogeneously aligned nematic liquid crystal layer. is possible, but
Unlike in Example 10, which used a liquid crystal cell for optical compensation having a ferroelectric liquid crystal layer as an optical compensation layer, temperature dependence of the contrast ratio occurred, and the contrast ratio was slightly lower than when using a liquid crystal cell for optical compensation. -Example 12 In Example 10 above, a cell without a transparent electrode was used as the optical compensation liquid crystal cell, but if a cell with a transparent electrode like the electro-optic liquid crystal cell is used, the A voltage can be applied to the optical compensation liquid crystal cell, and the direction of the director can be easily aligned in the P direction.

Example 13 In Example 10 above, the same liquid crystal is used for both the electro-optical liquid crystal cell and the optical compensation liquid crystal cell, but it is not necessary to use the same liquid crystal, and it is possible to obtain the same effect with different liquid crystals. However, in this case, it is better to use a cell whose tilt angle has a similar temperature dependence.Also, the alignment direction of electro-optic liquid crystal cells and optical compensation liquid crystal cells is vertical, but electro-optic liquid crystal cells However, this does not apply when different liquid crystals are used in the optical compensation liquid crystal cell, and even when the same liquid crystal is used, it has been recognized that the effect can be achieved as long as the angle is within the range of 80° to 100°.

Embodiment 14 FIG. 17 is a cross-sectional view of a liquid crystal optical device according to an embodiment of the present invention, where 354 is a liquid crystal layer, 381 and 382 are upper and lower polarizing plates, respectively, and 360 is an optical compensation layer, which is uniaxial. Stretched film is used.

355.356 is the upper substrate of electro-optic liquid crystal cell 001,
This is an alignment film for each of the lower substrates, and the alignment process is performed by rubbing in alignment treatment directions 391 and 392 shown by arrows, and the liquid crystal is homogeneously aligned within the cell.

FIG. 18 is a diagram showing the relationship among the polarizing axes of the upper and lower polarizing plates, the direction of the director of liquid crystal molecules, and the optical axis of the uniaxially stretched film. 397 and 398 are the polarization axes of the upper and lower polarizing plates, respectively, and form an angle of 90@. 400 is the direction of the liquid crystal director, which forms an angle of 45° with the polarization axis of the upper and lower polarizing plates. 399 is the direction of the optical axis of the uniaxially stretched film, and 40 is the direction of the director of the liquid crystal.
It is perpendicular to 0.

The thickness of the liquid crystal layer of this cell was Δnd=30 nm when light was blocked, and the contrast ratio when there was no optical compensation layer was 1:15. However, Δnd
When the optical compensation layer 360 with a thickness of about 30 nm is inserted, the glue tarpthion value when the liquid crystal layer and the optical compensation layer 360 are combined becomes about Onm when light is blocked, and a contrast ratio of 1:100 or more is obtained. Compared to before inserting the compensation layer, a contrast ratio of 6 times or more was obtained.

Example 15 FIG. 19 is a sectional view of a liquid crystal optical device according to an example of the present invention, in which an optical compensation liquid crystal cell 002 is used as an optical compensation layer instead of the film in Example 14.

Reference numerals 393 and 394 indicate the orientation treatment directions of the upper and lower substrates of the compensation liquid crystal cell, and the liquid crystal layer 364 is homogeneously aligned within the cell. Also, as in Example 14, the polarization axes of the upper polarizing plate 381 and the lower polarizing plate 382 are 9
It forms an angle of 0° and an angle of 45° with the director direction of the liquid crystal layer 354 and the liquid crystal layer 364, and the liquid crystal layer 3
One direction of the directors 54 and 364 is orthogonal. The return value of optical compensation liquid crystal cell 002 is approximately 3.
0 nm, and thus, as in Example 14, 1: i
A contrast ratio of oo or more was obtained.

Embodiment 16 FIG. 20 is a sectional view of a liquid crystal optical device according to an embodiment of the present invention, in which an optical compensation liquid crystal cell 002 is used as an optical compensation layer.
395 and 396 indicate the alignment treatment directions of the upper and lower substrates of the compensation liquid crystal cell, the liquid crystal layer 374 is homogeneously aligned within the cell, and the cell gap is equal to that of the electro-optic liquid crystal cell 001. It has become.

Furthermore, the relationships among the polarization axes of the upper and lower polarizing plates, the direction of the director of the liquid crystal layer 354, and the direction of the director of the liquid crystal layer 374 are the same as in Example 15. An alternating current voltage is always applied to the optical compensation liquid crystal cell 002, and the applied voltage is equal to the voltage applied to the electro-optical liquid crystal cell in the light-blocking state. In a liquid crystal optical device with this structure,
In the light-blocking state, the retardation values of the electro-optic liquid crystal cell 001 and the optical compensation liquid crystal cell 002 are equal, and the directions of their directors are orthogonal, so
When the electro-optical liquid crystal cell 001 and the optically compensated liquid crystal cell 002 are combined and the terpsion value is always Onm regardless of the applied voltage, the amount of transmitted light is extremely small, resulting in a high contrast ratio as in Example 15. was gotten.

Example 17 The uniaxially stretched film used as the optical compensation layer in Example 14 above and the optical compensation liquid crystal cell used as the optical compensation layer in Example 15 had the following effects: However, it has been recognized that sufficient effects can be obtained even when there is a turbulence corresponding to when no voltage is applied.

Example 18 In Examples 3, 7, 12, and 16, optical compensation liquid crystal cells having line electrodes are used, and by applying voltage through the electrodes, positive display and negative It also becomes possible to easily switch the display.

Embodiment 19 FIG. 18 is a block diagram showing an embodiment of a three-dimensional image device using the liquid crystal optical device of the present invention, 011 is a CRT, 01
2 are glasses for stereoscopic imaging using the liquid crystal optical device of the present invention, and the glasses for stereoscopic imaging O12 are the liquid crystal optical device for left limit 0.
14 and a liquid crystal optical device 015 for the right eye. The right eye liquid crystal optical device 015 and the right eye liquid crystal optical device 015 have the same structure, and use the same liquid crystal optical device as used in the first embodiment.

The left eye and right eye screens are alternately projected on the CRTO II, and at the same time, when the left eye screen is being projected on the CRTO II, a voltage is applied to the right eye liquid crystal optical device 015, and the light is turned off. The left eye liquid crystal optical device 014
transmits light when a voltage is applied. Also, CRTO
When the screen for the right eye is displayed on II, a voltage is applied to the liquid crystal optical device 014 for the left eye to block light, and the liquid crystal optical device 015 for the right eye is in a state where no voltage is applied and allows light to pass through. From this point on, the left eye screen is viewed with the left eye, and the right eye screen is viewed with the right eye, so a stereoscopic image can be obtained.

When using a liquid crystal optical device with a conventional structure that does not have an optical compensation layer, the contrast ratio is only about 1:8, and when light is blocked, the other image is visible, making it impossible to obtain a sufficient three-dimensional image. However, in the stereoscopic image device of this embodiment,
Since the contrast ratio of the liquid crystal optical device is 1=100 or more, sufficient stereoscopic images were obtained without seeing the other image when light was blocked.

Example 20 FIG. 19 is a cross-sectional view of the stereoscopic glasses used in this example. The electro-optical liquid crystal optical cell is common to the left and right eyes, but the uniaxially stretched film for optical compensation is 411 and 411 for the left eye. It is divided into 412 for the right eye.

The liquid crystal layer 404 in the electro-optical liquid crystal cell has a π orientation, and is set to have a retardation of 320 nm when no voltage is applied, and a retardation of 50 nm when a voltage is applied. Also, uniaxially stretched film for left eye -411 glue tarp-
320nm, uniaxially stretched film for right eye 412
The retardation of is 50 nm. FIG. 20 is a diagram showing the relationship between the polarization axis of the polarizing plate, the alignment treatment direction of the electro-optic liquid crystal cell, and the optical axis of the uniaxially stretched film.
The optical axis 424 of the right eye and the optical axis 425 of the single-wheel stretched film 412 for the right eye are perpendicular to each other. Polarization axes 426 and 427 are orthogonal.

The left eye and right eye screens are alternately projected on the CRT, and at the same time, when the left eye screen is being projected on the CRT, a voltage is applied to the liquid crystal optical device to display images only on the left eye side. It allows light to pass through and blocks light from the right eye. Further, when the right-only screen is displayed on the CRT, no voltage is applied to the liquid crystal optical device, so that the image is transmitted only to the right eye side and light is blocked to the left eye side. As a result, the left-eye screen is viewed by the left eye, and the right-eye screen is viewed by the right eye, resulting in a stereoscopic image.

In the stereoscopic imaging device of this example, due to the effect of the optical compensation layer, the value of tarpsion when light is blocked for both the left and right eyes is Onm, so the contrast ratio is 1: Zo as in Example 19.
o or higher, and a sufficient stereoscopic image was obtained without the other image being visible when the light was blocked.

Example 21 In Example 19, the same liquid crystal optical device as in Example 1 was used, but it was recognized that sufficient stereoscopic images could be obtained even if the same liquid crystal optical device as in Examples 2 to 17 was used. There is.

In addition, in Example 16, the liquid crystal is π-oriented within the cell, but when looking only at the left eye side or right eye side,
The relationship between the electro-optic liquid crystal cell and the optical compensation layer is as shown in Examples 1 to 13.
It is also recognized that sufficient stereoscopic images can be obtained if the configuration is the same as either of the above.

Embodiment 22 FIG. 2-1 is a block diagram of a stereoscopic image device according to an embodiment of the present invention, in which 016 is a CRT, 017 is an electro-optic liquid crystal cell, and 018 is stereoscopic image glasses, which are equipped with an optical compensation layer. ing.

FIG. 22 is a cross-sectional view of the electro-optical liquid crystal cell used in the present invention, where 509 is a polarizing plate, 521 is a polarization axis of the polarizing plate, and 50
4 is a nematic liquid crystal layer, 522° and 523 are alignment treatment directions, and the surfaces of the alignment [505 and 506 are rubbed in the direction of the arrow. Arrow 050 is the direction of the CRT. Figure 23(a).

(b) is a cross-sectional view of the light-transmitting part of the glasses for stereoscopic imaging, (a) is for the left eye, (b) is for the right eye, and arrow 05
1 indicates the direction of the CRT. On the right eye side, since a contrast ratio of 1:50 or more can be obtained even without an optical compensation layer, no optical compensation layer is provided.On the other hand, on the left eye side, a liquid crystal cell for compensation is used as the optical compensation layer. 526,
527 is the polarization axis of the polarizing plates 517 and 518, respectively, and 524° and 525 are the alignment processing directions of the compensation liquid crystal cell.

Figure 24 shows the relationship between the polarization axes of the polarizing plate, the orientation treatment direction of the electro-optic liquid crystal cell, and the compensation liquid crystal cell when the directions of the polarization axes of the electro-optical liquid crystal cell and the polarizing plate for glasses for stereoscopic imaging are orthogonal to each other. 528 is an electro-optical liquid crystal cell;
29 is the twist direction of the compensation liquid crystal cell, from the CRT side substrate to the opposite side substrate, 90 degrees counterclockwise (90 degrees left) for electro-optic liquid crystal cells, and 90 degrees clockwise for optical compensation liquid crystal cells. (90” on the right) Twisted.

The left eye screen and the right eye screen are displayed alternately on the CRT, and at the same time, when the left eye screen is being projected, a voltage is applied to the electro-optical liquid crystal cell in synchronization with the left eye screen, and the right eye screen is displayed. When the image is displayed, no voltage is applied. Then, the right eye and the left eye view the right eye screen and -left eye screen, respectively, and a stereoscopic image is obtained.

In the absence of an optical compensation layer, light leakage occurs on the left eye side, that is, the side that is in a light-blocking state when no voltage is applied, and a contrast ratio of only about 1=15 is obtained.

Although it was not possible to obtain a sufficient stereoscopic image because the image from the right eye side was visible, in this example, due to the effect of the optical compensation liquid crystal cell, a contrast ratio of 1:50 or more was obtained for both the left and right eyes. , we were able to obtain sufficient 3D images.

Example 23 FIG. 25 is a cross-sectional view of an electro-optic liquid crystal cell used in the present invention, and unlike Example 22, a 1/4λ plate 530 was provided as an optical compensation layer on the side of the cell that did not have a polarizing plate. ing.

FIGS. 26(a) and 26(b) are cross-sectional views of the light-transmitting part of stereoscopic imaging glasses, with (a) being for the left eye and (b) being for the right eye. On the CRT side of the polarizing plate, a 1/4 λ plate 532 is provided as an optical compensation layer on the right eye side, and an optical compensation liquid crystal cell and 1/4 λ plate 531 are provided on the left eye side. The liquid crystal cell for optical compensation includes a substrate 511 having alignment films 515 and 516 whose surfaces are aligned by rubbing in the directions of arrows 524 and 525. -512 sandwich a liquid crystal layer 514. FIG. 27 shows the polarization axes of the polarizing plates, the orientation processing directions of the electro-optic liquid crystal cells, the liquid crystal cells for optical compensation, and It is a diagram showing the twist direction and the direction of the optical axis of 1/4λ, where 528 is the twist direction of the liquid crystal in the electro-optical liquid crystal cell, 529 is the twist direction of the liquid crystal in the optical compensation liquid crystal cell, and the twist angle in both cases is 90@. Optical axis 533 of the 1/4λ plate provided on the electro-optical liquid crystal cell side and optical axis 534,535 of the 1/4λ plate provided on the stereoscopic video glasses.
are perpendicular to each other and form an angle between the optical axes 521 and 451 of the polarizing plates.

The configuration and operating method of this stereoscopic imaging device are the same as in Example 22, and in the case of no optical compensation layer, the contrast ratio is only about 1:15 on the left limit side, that is, on the side where light is blocked when no voltage is applied. If the angle between the polarization axes of the electro-optical liquid crystal cell and the stereoscopic glasses deviates from the right angle, the contrast ratio will further decrease. This resulted in a 3D image that looked very bad. However, in the stereoscopic image device of the present invention, due to the effect of the liquid crystal cell for optical compensation, the transmittance when light is blocked on the left eye side is almost 0.
%, and due to the effect of the 1/4λ plate, the propagation of light between the electro-optic liquid crystal cell and the 3D glasses is circularly polarized, so the angle between the polarization axes of the electro-optic liquid crystal cell and the 3D glasses is 90°. Even if it deviates from the original position, there is almost no light leakage. Due to the above effects, both the left and right eyes are always 1
= It became possible to obtain a contrast ratio of 50 or more, and a very good-looking stereoscopic image was obtained.

Example 24 FIG. 28 is a cross-sectional view of an electro-optical liquid crystal cell used in the present invention, in which the liquid crystal layer 604 has a π orientation, and the retardation values are 30 when voltage is applied and when no voltage is applied.
nm, 300 nm.

FIGS. 29(a) and 29(b) are cross-sectional views of the light transmitting portion of stereoscopic imaging glasses, with (a) being for the left eye and (b) being for the right eye. 611 and 613 are optical compensation layers, each using a uniaxially stretched film and having a retardation value of 3.
They are 0 nm and 300 nm. No. 301! 1 is a diagram showing the relationship between the polarization axis of the polarizing plate of the electro-optic liquid crystal cell and stereoscopic glasses, the orientation treatment direction of the electro-optic liquid crystal cell, and the optical axis of the uniaxially stretched film. The optical axes 624, 626 of the stretched film form an angle of 456 with the polarizing axes 621, 625, 627 of the polarizing plate, and
The polarization axes 621, 625, and 627 of the polarizing plates are perpendicular to each other.

The configuration and operating method of this stereoscopic imaging device are the same as in Example 22, and when a voltage is applied to the electro-optic liquid crystal cell, on the left eye side, the electro-optic liquid crystal cell and the optical compensation liquid crystal cell are aligned or a tarp is applied. - The beam is Onm and light is blocked, and the beam on the right eye side is 270 nm and light is transmitted.

On the other hand, when no voltage is applied to the electro-optical liquid crystal cell, the electro-optical liquid crystal cell and the optical compensation liquid crystal cell are aligned on the right eye side, and the tarp is set to Onm, blocking light, and the left eye side is covered with a tarp. - The wavelength becomes 270 nm and light is transmitted.

When no optical compensation layer is used, light leakage occurs when light is blocked for both the left and right eyes, so the contrast ratio is 1:20.
However, in this example, due to the effect of the optical compensation layer, a contrast ratio of 1:100 or more could be obtained for both the left and right eyes, and a sufficient stereoscopic image could be obtained.

Example 25 FIG. 31 is a cross-sectional view of an electro-optical liquid crystal cell used in the present invention, and unlike Example 24, a 1/4λ plate 630 was provided as an optical compensation layer on the side of the cell that did not have a polarizing plate. ing.

Further, the adhesive turbulence value of this electro-optical liquid crystal cell without an optical compensation layer is 30 nm when voltage is applied and 300 nm when no voltage is applied.

FIGS. 32(a) and 32(b) are cross-sectional views of the light-transmitting part of stereoscopic imaging glasses, in which (a) is for the left eye, and (b) is for the right eye. 631 and 632 are optical compensation layers, each using a uniaxially stretched film and having a retardation value of 3.
00 nm and 580 nm. Figure 33 shows the polarization axes of the polarizing plate when the directions of the polarizing axes of the electro-optical liquid crystal cell and the polarizing plate of stereoscopic vision glasses are orthogonal, the orientation treatment direction of the electro-optic liquid crystal cell and the liquid crystal cell for optical compensation, and the uniaxial direction. It is a diagram showing the direction of the optical axis of the stretched film, and the orientation processing direction 622.6
The optical axes 633 of the 23 and 174λ plates are perpendicular to the optical axes 634 and 635 of the uniaxially stretched films, and form an angle of 45° with the polarizing axis 621 of the polarizing plate.

The configuration and operating method of this stereoscopic imaging device are the same as in Example 22, and without the optical compensation layer, light leakage occurs on both the left eye side and the right eye side, and a contrast ratio of only about 1=20 can be obtained. However, in this example, due to the effect of the optical compensation layer, a contrast ratio of about 1:100 was always obtained regardless of the angle between the polarization axes of the electro-optic liquid crystal cell and the stereoscopic imaging glasses.

Example 26 FIG. 34 is a cross-sectional view of an electro-optical liquid crystal cell used in the present invention, where 704 is a liquid crystal layer exhibiting ferroelectricity and Δn=0.
135, the cell gap is 2 μm. Further, the surface of the alignment film is subjected to alignment treatment by rubbing in the direction of arrow 722.

FIGS. 35(a) and 35(b) are cross-sectional views of the light transmitting portion of the stereoscopic imaging glasses used in this example, where (a) is for the left eye and (b) is for the right eye. The optical compensation layer was provided only on the left eye side, and a uniaxially stretched film 709 with a retardation value of 270 nm was used.

Figure 36 shows the polarization axis of the polarizing plate, the alignment direction of the electro-optic liquid crystal cell, the optical axis of the uniaxially stretched film, and the direction of the director when the polarizing axes of the electro-optical liquid crystal cell and the polarizing plate of stereoscopic imaging glasses are perpendicular to each other. It is a diagram showing the relationship in the direction of 726
．． Reference numeral 727 indicates the direction of the bistable two-state director in the ferroelectric liquid crystal cell, making an angle of 45'' and making an angle of 22.5'' with the alignment direction 722.

Further, the direction 726 of the director and the direction of the polarization axis of the polarizing plate on the stereoscopic video glasses side match. When the director is facing in the direction of 727, when the electro-optic liquid crystal cell and stereoscopic glasses are aligned on the left side, the tarpsion value becomes Onm and light is blocked, but on the right eye side, the light is blocked. The filter has a wavelength of 270 nm and transmits light. On the other hand, when the director is facing in the direction of 726, when the electro-optical liquid crystal cell and stereoscopic glasses are combined on the right eye side, the tarpaulin value becomes Onm and the light is blocked, but the left limit The beam tarp on the side is 2
The wavelength becomes 70 nm and light is transmitted.

The configuration of this stereoscopic video device is the same as that of the 21st embodiment. The operation method is to alternately display the left-eye screen and the right-eye screen on the CRT, and at the same time, control the direction of the electric field applied to the electro-optic liquid crystal cell in synchronization with the left-eye screen, so that the left-eye screen is displayed. When the screen for the right eye is displayed, point the director in the direction of 726, and when the right eye screen is displayed, point the director in the direction of 727.

In the case where there is no optical compensation layer, light leakage occurs when light is blocked when the direction of the director is 727 on the left eye side, so the contrast ratio is only about 1:20, but in this example, the contrast ratio was only about 1:20. Due to the effect of the optical compensation layer, it was possible to obtain a contrast ratio of 1:100 or more for both the left and right eyes, and a sufficient stereoscopic image could be obtained.

Example 27 FIG. 37 is a cross-sectional view of an electro-optical liquid crystal cell used in the present invention, and unlike Example 26, it has a 1/4λ plate 730 as an optical compensation layer on the side of the cell that does not have a polarizing plate. .

FIGS. 38(a) and 38(b) are cross-sectional views of the light transmitting portion of stereoscopic imaging glasses, in which (a) is for the left eye, and (b) is for the right eye. As the optical compensation layer, a uniaxially stretched film 731 with a tardage Ron value of 540 nm is used on the left eye side, and a 1/4λ plate 732 is used on the right eye side.

FIG. 39 shows the polarization axes of the polarizing plates, the orientation processing directions of the electro-optic liquid crystal cell, the liquid crystal cell for optical compensation, and It is a diagram showing the direction of the optical axis of a uniaxially stretched film, and 726 and 727 are the directions of the director in two bistable states of the ferroelectric liquid crystal, forming an angle of 45°,
It forms an angle of 22.5° with the orientation treatment direction 722.

Also. The director direction 726 is the polarization axis 72 of the polarizing plate.
734.735 and 4
It forms an angle of 5@. The configuration and operating method of this stereoscopic image device are the same as in the 26th embodiment.

When there is no conventional optical compensation layer, on the right side, when light is blocked,
In other words, when the direction of the girector is 727, approximately 5% of the light leakage occurs when light is blocked.
Although the contrast ratio was only about 1:20, in this example, due to the effect of the optical compensation layer, the contrast ratio was always 1: regardless of the angle formed by the polarization axes of the electro-optic liquid crystal cell and the polarizing plates of the stereoscopic glasses. A contrast ratio of about 100 was obtained, and a sufficient three-dimensional image was obtained.

Example 2B FIG. 40 is a cross-sectional view of an electro-optical liquid crystal cell used in the present invention, in which the liquid crystal layer 804 has a homogeneous orientation, and the retardation values when voltage is applied and when no voltage is applied are respectively 30 nm. , 300 nm.

FIGS. 41(a) and 41(b) are cross-sectional views of the light-transmitting portion of stereoscopic imaging glasses, in which (a) is for the left eye, and (b) is for the right eye. 811 and 813 are optical compensation layers, each using a single stretched film and having a retardation value of 3.
They are 0 nm and 300 nm. FIG. 42 is a diagram showing the relationship between the electro-optical liquid crystal cell, the polarizing axis of the polarizing plate of the stereoscopic video glasses, the orientation treatment direction of the electro-optic liquid crystal cell, and the optical axis of the uniaxially stretched film, and the orientation treatment directions 822, 823 The optical axes 824 and 826 of the uniaxially stretched film are the polarizing axis 82 of the polarizing plate.
1,825,827 form an angle of 45 degrees, and the polarization axes 821, 825, and 827 of the polarizing plate are orthogonal to each other.

The configuration and operating method of this stereoscopic image device are the same as in Example 22, and when a voltage is applied to the electro-optic liquid crystal cell, the electro-optic liquid crystal cell and the optical compensation liquid crystal cell are aligned on the left eye side. The tarp has a wavelength of Onm and blocks light, and on the right eye side, the tarp has a wavelength of 270 nm and allows light to pass through.

On the other hand, when no voltage is applied to the electro-optic liquid crystal cell, the electro-optical liquid crystal cell and the liquid crystal cell for optical compensation are aligned on the right eye side, and the tarp is Onm, blocking light, and on the left side, the tarp is on. - The wavelength becomes 270 nm and light is transmitted.

When no optical compensation layer is used, light leakage occurs when both the left and right eye lights are blocked, so the contrast ratio is 1:15.
However, in this example, due to the effect of the optical compensation layer, a contrast ratio of 1:100 or more could be obtained for both the left and right eyes, and a sufficient stereoscopic image could be obtained.

Actual J1 Example 29 No. 43121 is a cross-sectional view of the electro-optic liquid crystal cell used in the present invention, and unlike Example 28, the cell has a 1/4λ plate 830 as an optical compensation layer on the side that does not have a polarizing plate. are doing. Moreover, the value of glue turpitude in the absence of an optical compensation layer of this electro-optic liquid crystal cell is 30 n when a voltage is applied.
m, is 300 nm when no voltage is applied.

FIGS. 44(a) and 44(b) are cross-sectional views of the light-transmitting portion of stereoscopic imaging glasses, with (a) being for the left eye and (b) being for the right eye. 831 and 832 are optical compensation layers, each using a uniaxially stretched film and having a retardation value of 3.
00nm and 580nm. , FIG. 45 shows the polarization axes of the polarizing plate when the directions of the polarizing axes of the electro-optical liquid crystal cell and the polarizing plate of the stereoscopic vision glasses are orthogonal, the alignment treatment direction of the electro-optic liquid crystal cell and the liquid crystal cell for optical compensation, It is a diagram showing the direction of the optical axis of a uniaxially stretched film, and the orientation treatment direction 82
The optical axes 833 of the 2.823 and 174λ plates are perpendicular to the optical axes 834 and 835 of the uniaxially stretched film, and the polarizing axis 8 of the polarizing plate is perpendicular to each other.
21 and make an angle of 45°.

The configuration and operating method of this stereoscopic imaging device are the same as in Example 22, and without the optical compensation layer, light leakage occurs on both the left eye side and the right eye side, and a contrast ratio of only about 1:20 is obtained. However, in this example, due to the effect of the optical compensation layer, a contrast ratio of approximately 1=100 was always obtained regardless of the angle formed between the polarization axes of the electro-optic liquid crystal cell and the stereoscopic imaging glasses.

Embodiment 30 FIG. 46 is a block diagram of a stereoscopic video apparatus in an embodiment of the present invention, where 023 is a projector and 024 is a screen. The electro-optical liquid crystal cell used was the same as in Example 20.
The arrow 050 is the direction of the projector. The stereoscopic glasses used were the same as in Example 24, and arrow 05
1 is the direction of the screen. A projector alternately projects a screen for the left eye and a screen for the right eye, and in synchronization with this, a voltage is applied to the electro-optic liquid crystal cell when the screen for the left eye is being projected. When the right-limit screen is displayed, no voltage is applied to obtain a stereoscopic image.

When no optical compensation layer was used, the contrast ratio was only about 1:10 for both the right and left eyes, but
In this example, due to the effect of the optical compensation layer, both the left and right eyes have 1
: A contrast ratio of 50 or more could be obtained, and a sufficient stereoscopic image could be obtained.

Example 31 In Example 30, the same electro-optic liquid crystal cell and stereoscopic glasses as those used in Example 24 were used, but the electro-optic liquid crystal cell and stereoscopic glasses used in Example 25 were used. In that case, the configuration and operation method of the stereoscopic video device are exactly the same as in the 30th embodiment, and the arrow 051 is the direction of the projector and the arrow 052 is the direction of the screen.

In this example, due to the effect of the optical compensation layer, it is possible to obtain a contrast ratio of 1:50 or more for both the left and right eyes, regardless of the angle formed by the polarization axes of the electro-optic liquid crystal cell and the stereoscopic glasses, and a sufficient contrast ratio of 1:50 or more can be obtained for both eyes. I was able to get a 3D image.

Example 32 In the above Examples 22 and 23, the twist angle of the electro-optical liquid crystal cell used was 90@, but it does not necessarily have to be 90@, and is 80° to 1O·0″.

It was confirmed that angles of 255' to 285° and 435° to 465° also had sufficient effects.

In Examples 30 and 31, the electro-optical liquid crystal cell has a π orientation, but it has a sufficient effect even when it has a twisted orientation or a homogeneous orientation, and it also has a sufficient effect when a ferroelectric liquid crystal is used. It was recognized that it has a significant effect.

Furthermore, in Examples 22 and 23, a liquid crystal cell for optical compensation was used as the optical compensation layer, but it was recognized that the use of a uniaxially stretched film was also effective;
In Examples 4 to 31, a uniaxially stretched film is used as the optical compensation layer, but it is recognized that a sufficient effect can also be obtained when a liquid crystal cell for optical compensation is used.

Example 33 In Examples 23, 25, 27, 29, and 31 above, the optical compensation layer on the electro-optical liquid crystal cell side was installed on the side of the cell where there is no polarizing plate, but the same thing can be done when it is installed between the cell and the polarizing plate. The effect was obtained.

Example 34 Example 24 above. 25. 27. 28. 29.
In 30.31, separate uniaxially stretched films are used for the left eye and right eye as the optical compensation layer for the stereoscopic glasses, but a common uniaxially stretched film for the left and right eyes is used to match the stereoscopic glasses on either the left or right side. It has been found that it is also effective to install a film and, on the other side, to overlay a uniaxially stretched film to compensate for the difference in retardation.

Example 35 The uniaxially stretched films used in the above examples include diacetyl cellulose (DAC), cellulose diacetate,
Materials such as volether sulfone (PES), polyvinyl alcohol (PVA), polyamide, polyethylene terephthalate (PET), acrylic, polysal 7one, polyimide, polycarbonate, and polyolefin can be used.

〔Effect of the invention〕

As described above, according to the present invention, in addition to the electro-optic liquid crystal cell, an optical compensation layer having optical anisotropy is provided to compensate for the optical anisotropy that remains when the electro-optic liquid crystal cell is made light-blocking. , it has the effect that a high contrast ratio can be obtained by making the transmittance at the time of light blocking very small.

Further, a stereoscopic image device having such a liquid crystal optical device can completely separate images for the left eye and right eye, and can obtain a stereoscopic image that looks very good.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a liquid crystal optical device that is an embodiment of the present invention. FIG. 2 is a diagram showing the relationship between the upper and lower polarizing plates of the liquid crystal optical device of FIG. 1, the direction of the director, and the optical axis of the -axis stretched film. FIG. 3 is a sectional view of a liquid crystal optical device that is an embodiment of the present invention. FIG. 4 is a sectional view of a liquid crystal optical device that is an embodiment of the present invention. FIG. 5 is a sectional view of a liquid crystal optical device which is an embodiment of the present invention. FIG. 6 is a diagram showing the relationship among the upper and lower polarizing plates of the liquid crystal optical device of FIG. 5, the twist direction of the liquid crystal, and the optical axis of the uniaxially stretched film. FIG. 7 is a sectional view of a liquid crystal optical device that is an embodiment of the present invention. FIG. 8 is a sectional view of a liquid crystal optical device that is an embodiment of the present invention. FIG. 9 is a diagram showing the relationship between the upper and lower polarizing plates of the liquid crystal optical device of FIG. 8 and the twist direction of the liquid crystal. FIG. 10 is a sectional view of a liquid crystal optical device that is an embodiment of the present invention. FIG. 11 is a diagram showing the temperature dependence of the tilt angle of the ferroelectric liquid crystal used in the liquid crystal optical device shown in FIG. 10 and the contrast ratio of the liquid crystal optical device. FIG. 12 is a diagram showing the relationship between the orientation treatment direction of the liquid crystal optical device of FIG. 10 and the polarization axis of the polarizing plate. FIG. 13 is a diagram showing the temperature dependence of the contrast ratio of a conventional liquid crystal optical device. FIG. 14 is a sectional view of a liquid crystal optical device which is an embodiment of the present invention. FIG. 15 is a diagram showing the relationship between the upper and lower polarizing plates of the liquid crystal optical device of FIG. 14, the direction of the director, and the optical axis of the uniaxially stretched film. FIG. 16 is a sectional view of a liquid crystal optical device which is an embodiment of the present invention. FIG. 17 is a sectional view of a liquid crystal optical device that is an embodiment of the present invention. FIG. 18 is a configuration diagram showing an embodiment of a stereoscopic image device using the liquid crystal optical device of the present invention. FIG. 19 is a cross-sectional view of the light-transmitting part of the stereoscopic imaging glasses used in Example 13. Figure 20 shows the polarization axis of the polarizing plate of the liquid crystal optical device in Figure 19;
FIG. 3 is a diagram showing the relationship between the alignment treatment direction of an electro-optical liquid crystal cell and the optical axis of a uniaxially stretched film. FIG. 21 is a configuration diagram showing an embodiment of a stereoscopic image device using the liquid crystal optical device of the present invention. FIG. 22 is a cross-sectional view of the electro-optic liquid crystal cell used in Example 22. FIG. 23 is a cross-sectional view of the light-transmitting part of the stereoscopic imaging glasses used in Example 22. FIG. 24 shows the relationship between the polarization axes of the polarizing plates, the orientation treatment directions of the electro-optic liquid crystal cell, and the compensation liquid crystal cell when the polarization axes of the electro-optic liquid crystal cell and stereoscopic imaging glasses are perpendicular to each other in Example 22. Figure. FIG. 25 is a cross-sectional view of the electro-optical liquid crystal cell used in Example 23. FIG. 26 is a cross-sectional view of the light-transmitting part of the stereoscopic imaging glasses used in Example 23. FIG. 27 shows the relationship between the polarization axes of the polarizing plates, the orientation treatment directions of the electro-optic liquid crystal cell, and the compensation liquid crystal cell when the polarization axes of the electro-optic liquid crystal cell and stereoscopic imaging glasses are perpendicular to each other in Example 23. Figure. FIG. 28 is a cross-sectional view of the electro-optical liquid crystal cell used in Example 24. FIG. 29 is a cross-sectional view of the light-transmitting part of the stereoscopic imaging glasses used in Example 24. Figure 30 shows the polarization axis of the polarizing plate, the orientation treatment direction of the electro-optic liquid crystal cell, and the optical axis of the uniaxially stretched film when the polarization axes of the electro-optic liquid crystal cell and stereoscopic glasses are perpendicular to each other in Example 24. A diagram showing the relationship between. FIG. 31 is a cross-sectional view of the electro-optic liquid crystal cell used in Example 25. FIG. 32 is a cross-sectional view of the light-transmitting part of the stereoscopic imaging glasses used in Example 25. FIG. 33 shows the relationship among the polarization axis of the polarizing plate, the orientation treatment direction of the electro-optic liquid crystal cell, and the optical axis of the uniaxially stretched film when the polarization axes of the electro-optic liquid crystal cell and stereoscopic imaging glasses are perpendicular to each other in Example 25. Diagram showing. FIG. 34 is a cross-sectional view of the electro-optic liquid crystal cell used in Example 26. FIG. 35 is a cross-sectional view of the light-transmitting part of the stereoscopic imaging glasses used in Example 26. FIG. 36 shows the polarization axis of the polarizing plate, the orientation treatment direction of the electro-optic liquid crystal cell, the optical axis of the uniaxially stretched film, and the optical axis of the uniaxially stretched film when the polarization axes of the electro-optic liquid crystal cell and stereoscopic glasses in Example 26 are perpendicular to each other. FIG. 3 is a diagram showing the relationship between the director directions of dielectric liquid crystal. FIG. 37 is a cross-sectional view of the electro-optical liquid crystal cell used in Example 27. FIG. 38 is a sectional view of the light transmitting portion of the stereoscopic imaging glasses used in Example 27. FIG. 39 shows the polarization axis of the polarizing plate, the orientation treatment direction of the electro-optic liquid crystal cell, the optical axis of the uniaxially stretched film, and the optical axis of the uniaxially stretched film when the polarization axes of the electro-optic liquid crystal cell and stereoscopic video glasses in Example 27 are perpendicular to each other. FIG. 3 is a diagram showing the relationship between the director directions of dielectric liquid crystal. FIG. 40 is a cross-sectional view of the electro-optical liquid crystal cell used in Example 28. FIG. 41 is a cross-sectional view of the light-transmitting portion of the stereoscopic imaging glasses used in Example 28. FIG. 42 shows the relationship among the polarization axis of the polarizing plate, the orientation treatment direction of the electro-optic liquid crystal cell, and the optical axis of the uniaxially stretched film when the polarization axes of the electro-optic liquid crystal cell and stereoscopic imaging glasses are perpendicular to each other in Example 28. Diagram showing. FIG. 43 is a cross-sectional view of the electro-optical liquid crystal cell used in Example 29. FIG. 44 is a cross-sectional view of the light-transmitting part of the stereoscopic imaging glasses used in Example 29. FIG. 45 shows the relationship among the polarization axis of the polarizing plate, the orientation treatment direction of the electro-optic liquid crystal cell, and the optical axis of the uniaxially stretched film when the polarization axes of the electro-optic liquid crystal cell and stereoscopic imaging glasses are perpendicular to each other in Example 29. Diagram showing. FIG. 46 is a configuration diagram showing an embodiment of a stereoscopic image device using the liquid crystal optical device of the present invention. 001 -- Electro-optic liquid crystal cell 002 -- Optical compensation liquid crystal cell 011 -- CRT O12 -- Stereoscopic imaging glasses 013 -- Drive device 014 -- Liquid crystal optical device for left eye 015 -- Right Limited-time liquid crystal optical device 016...CRT 017...Electro-optical liquid crystal cell 018...-Glasses for stereoscopic imaging 019...Drive device 020...Electro-optical liquid crystal cell 021...Glasses for stereoscopic imaging 022- ...Drive device 023...-Projector 024...Screen 050...CRT or projector direction 051--
CRT or screen direction 101.102...
Substrate 104 -- Liquid crystal layer 105.106 Alignment film 107.108 Transparent electrode 110 -- Optical compensation layer 111.112 -- Substrate 114 -- Liquid crystal layer 115.116 Orientation Film 121.122...Substrate 124...Liquid crystal layer 125.126...Alignment film 127.128...Transparent electrode 131...Upper polarizing plate 132-...Lower polarizing plate 141% 142.143. 144.145.146・
...Orientation treatment direction 147,148--Polarizing axis of polarizing plate 149--Direction of optical axis of uniaxially stretched film 150--
・Liquid crystal director direction 201.202...Substrate 204...Liquid crystal layer 205.206...Alignment film 207.208...Transparent electrode 21O-・Optical compensation layer 211.212...Substrate 214 , liquid crystal layer 215.216...alignment film 221.222...substrate 224--liquid crystal layer 225.226--alignment film 231...upper polarizing plate 232...lower polarizing plate 241.242. 243.244.245.246...
・Alignment processing direction 247.248...Polarization axis of polarizing plate 249.251...Twist direction of liquid crystal 250...
Optical axis direction of uniaxially stretched film 301, 302...Substrate 304...Liquid crystal layer 305, 306...Alignment film 307, 308...Transparent electrode 311, 312...Substrate 314...Liquid crystal layer 315.316...Alignment film 321.322...Polarizing plate 331.332-...Orientation processing direction 341.342...Direction of polarization axis of polarizing plate 345.3
46.347...director direction 351.352
...Substrate 354...Liquid crystal layer 355.356...Alignment film 357.358...Transparent electrode 360...Optical compensation layer 361.362...Substrate 364...Liquid crystal layer 365.36 row ... Alignment film 371.372 ... Substrate 374 - ... Liquid crystal layer 375.376 ... Alignment film 311, 378 ... Transparent electrode 381 ... Upper polarizing plate 382 ... Lower polarizing plate 3911392, 393 , 394.395, 396...
・Orientation processing direction 397.398...Polarizing axis of polarizing plate 399...Direction of optical axis of uniaxially stretched film 400--
-Direction of liquid crystal director 401,402...Substrate 404-...Liquid crystal layer 405,406...Alignment film 407,408-...Transparent electrode 409,410...Polarizing plate 411,412... Uniaxially stretched film 421.422
...Alignment direction 423--Director direction 424.425--Optical axis 426.427--Polarization axis 501.502--Substrate 504--Motormatic liquid crystal layer 505.506-- -Alignment film 507,508--Transparent electrode 509-Polarizing plate 511,512--Substrate 514-One liquid crystal layer 515,516-Aligning film 517,518--Polarizing plate 521... Polarizing axis of polarizing plate 522.523.524.525 --- Alignment processing direction 526.527 --- Polarizing axis of polarizing plate 528.529 --- Twisting direction of liquid crystal 530.53
1.532...144λ plate 533.534.535.
...Optical axis of 144λ plate 601,602--Single substrate 604...Liquid crystal layer 605,606...-Alignment film 607,608--Transparent electrode 609--Polarizing plate 611,613...Optical compensation Layers 612, 614 - Polarizing plate 621 - Polarizing axis of polarizing plate 622, 623 - Orientation treatment direction 624, 626 - Optical axis of uniaxially stretched film 625.
627...-Polarizing axis of polarizing plate 630--144λ plate 631.632--Optical compensation layer 633--Optical axis of 144λ plate 634.635...Direction of optical axis of uniaxially stretched film 701.702 ... Substrate 704 ... Liquid crystal layer 705 - ... Alignment film 706. Polarization axis of plate 722... Orientation processing direction 723... Direction of optical axis of uniaxially stretched film 724.7
25...Polarization axis of polarizing plate 726.727...Director direction 730-17
4λ plate 731...-uniaxially stretched film 732--144λ plate 733-174Direction of the optical axis of the λ plate 734.735...Direction of the optical axis of the uniaxially stretched film or more Applicant: Seiko Epson Corporation 149 \IX 241 Fishing 4 Figure 5 ↑ 2507〈1 244, /- \ ~ Demon Figure 8 247\ ↑ Temperature C) 1 \ I 3g4393 381 Figure 16\ Kang Demon Figure 17 Figure 8.21flJ Figure 19 424.42 2717X. , 81 IIIJ Wl evening 5ku ζ 'r1 - here 521 Fig. 23 Mon\522 Fig. 24 △ 1050 Malf7" Fig. 25 Fig. 26 - Black 529 /±\ Fig. 27 Δ / Fig. 28, 9, ......,7..?, 1.・ 26F \ l /' 622.623 ../-1\\621 Fig. 30 6 ζ ′r〕2;Pro21 =ka="Resentment- Δ / Fig. 34 tQ) + / Fig. 35 1 List 724.725.726 Fig. 36 8 1050 "Kun II"/" Fig. 37 "Ma fl"';7"34 1.1 Lower Interval'/735 Fig. 38 Δ / ゜1.n, -24 Fig. 41 824.82 Rop\shi... / Fig. 42 832 Vrit... \I//- h/ ”'・i・ ト

Claims (4)

[Claims] (1) A liquid crystal layer is sandwiched between a pair of opposing substrates that have electrodes on their inner surfaces, and the electro-optic effect of the liquid crystal layer allows light to pass through.
In a liquid crystal optical device having an electro-optic liquid crystal cell that controls blocking, in addition to the electro-optic liquid crystal cell, an optical anisotropy for compensating for optical anisotropy that remains when the electro-optic cell is brought into a light blocking state. 1. A liquid crystal optical device comprising an optical compensation layer having: (2) The liquid crystal optical device according to claim 1, wherein the optical compensation layer is an optical compensation liquid crystal cell in which a nematic liquid crystal layer is sandwiched between a pair of substrates. (3) The liquid crystal optical device according to claim 1, wherein the optical compensation layer is a uniaxially stretched film. (4) A stereoscopic image device comprising the liquid crystal optical device according to claim 1.