JP2003259395A - Stereoscopic display method and stereoscopic display apparatus - Google Patents

Stereoscopic display method and stereoscopic display apparatus

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Publication number
JP2003259395A
JP2003259395A JP2002059918A JP2002059918A JP2003259395A JP 2003259395 A JP2003259395 A JP 2003259395A JP 2002059918 A JP2002059918 A JP 2002059918A JP 2002059918 A JP2002059918 A JP 2002059918A JP 2003259395 A JP2003259395 A JP 2003259395A
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JP
Japan
Prior art keywords
liquid crystal
display device
image
eye
device according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002059918A
Other languages
Japanese (ja)
Inventor
Hirofumi Yamakita
裕文 山北
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd, 松下電器産業株式会社 filed Critical Matsushita Electric Ind Co Ltd
Priority to JP2002059918A priority Critical patent/JP2003259395A/en
Publication of JP2003259395A publication Critical patent/JP2003259395A/en
Application status is Pending legal-status Critical

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Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in a conventional stereoscopic display apparatus employing a liquid crystal panel for a display monitor that it causes a sense of fatigue to a user due to a double image or flickering because the screen is dark and the response is slow in comparison with those of a display apparatus employing a CRT. <P>SOLUTION: After writing each of R, G, B fields for the left eye image for one frame of 16.6 msec, similarly each field is written also for the right eye image. At that time, black is entirely written between fields, and each field is completed within a time of 16.6/6=2.8 msec or below from the writing, backlight emission and full back writing. The full screen back write time t5 may be at least a time t4 or over required for storing the liquid crystal. An OCB liquid crystal, which has a high modulation rate of the liquid crystal and compatibility between the high modulation rate and high speed response, is proper to the liquid crystal panel 12. For example, a trailing time t4 in the high speed OCB liquid crystal is selected to be 0.5 msec or below and the full screen black write time t5 can be set to be 0.5 msec that is nearly equal to the time t4. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method for observing stereoscopic images.
3D display method and 3D display device, especially for high brightness
The present invention relates to a flat panel type stereoscopic display device. 2. Description of the Related Art Conventionally, various methods have been used for stereoscopic display.
Equations have been proposed.
In addition to the shutter glasses method, parallax
A barrier method, a lenticular method, and the like can be given. However, in either method, the resolution is
If you try to obtain a high-quality stereoscopic image while maintaining the
Image and the image for the right eye, that is, double the video information
Because the amount needs to be handled, the brightness is reduced to less than half, left
Solving issues such as the need for fast switching of the right image
Must. In Japanese Patent Application Laid-Open No. 2000-275575,
Obtain bright stereoscopic images with the LCD shutter glasses method
A stereoscopic display device that can be displayed is disclosed. FIG.
Is proposed in JP-A-2000-275575.
FIG. 1 is a diagram illustrating a configuration example of a stereoscopic video display device. [0005] The stereoscopic video signal 104 is a scan converter.
The signal is converted into a time-division video signal by the
At 06, the images of the left and right eyes are displayed in a time-division manner. Light scattering liquid crystal
The spectacles 108 scatter light to the left and right eyes, respectively.
Type liquid crystal element 109, for example, a monitor 106
When the left eye image field is displayed on the
The liquid crystal element of the right eye becomes
The child is operated to be in a scattering state. As described above, the light scattering type liquid crystal display device is used.
This greatly improves the transmittance of the liquid crystal element when it is transmitted.
Thus, a bright stereoscopic image can be observed. [0007] However, the above-mentioned problems
In the case of such a stereoscopic display device, the following problems remain.
I was (1) When a liquid crystal panel is used for a monitor, a bright image is displayed.
To achieve this, it is necessary to increase the brightness of the backlight.
As a result, power consumption increases. Also,
There is a limit to improving the brightness as compared with the CRT. (2) Left image using liquid crystal panel for monitor
If you try to display alternately the right image and
Afterimages remain in crystals, resulting in double images or flickering
They can be seen and cause fatigue inherent in stereoscopic vision. [0009] To solve the above problems,
The three-dimensional display method and three-dimensional display device of the present application are as follows.
The configuration was adopted. That is, (1) the image for the left eye and the image for the right eye are exchanged for each field.
Display means assigned to each other and displayed on the same screen in time sequence
In synchronization with the step and switching between the left-eye image and the right-eye image
The left eye selectively views the left eye image and the right eye the right eye image.
This is a stereoscopic display method for observing stereoscopic images by
The display means comprises an optical switching means and an optical switching means.
The light source to irradiate the lighting means and the color of the light source in time sequence
The transmission of the optical switching means is synchronized with that.
Or a driving means for controlling the reflection state,
A three-dimensional display method of performing color display with mixed colors was adopted. (2) Image for left eye and right eye for each field
Images are alternately assigned and displayed on the same screen in time sequence.
Display means to be displayed, and switching between a left-eye image and a right-eye image
Synchronized with the left eye image for the left eye and the right eye image for the right eye
3D display to observe 3D images by selectively viewing
The device, wherein the display unit of the display unit displays an image for the left eye
Pixel for the left eye to display the image for the right eye
And a right-eye pixel portion. (3) The display means includes a liquid crystal panel and a liquid crystal panel.
Switch the light source to irradiate the panel and the color of the light source in time sequence
The transmission or reflection of the liquid crystal panel
Equipped with drive means for controlling the state,
Field sequential color system with color display
This is a three-dimensional display device. (4) The image for the left eye and the image for the right eye are the same
Display means for displaying on the screen, parallax barrier
The left eye image for the left eye, the right eye image for the right eye
Stereoscopic display method for observing stereoscopic images by selectively viewing
Wherein the display means comprises: an optical switching means; and
A light source for irradiating the light switching means, and a color of the light source.
Switching in time sequence, synchronized with the optical switching
A driving means for controlling the transmission or reflection state of the step,
A three-dimensional display method that performs color display with temporal additive color mixture
Was. (5) The image for the left eye and the image for the right eye are the same
Display means for displaying on the screen, parallax barrier
The left eye image for the left eye, the right eye image for the right eye
Stereoscopic display device for observing stereoscopic images by selectively viewing
The display unit of the display means displays the image for the left eye.
Pixel for the left eye to display the image for the right eye
A pixel portion for the right eye, wherein the display means is a liquid crystal panel;
The light source to illuminate the LCD panel and the color of the light source are switched in time sequence.
The transmission or reflection of the LCD panel
Equipped with drive means for controlling the state,
Field sequential color system with color display
This is a liquid crystal display device. (6) The parallax barrier is an optical switch.
The configuration was made up of chining means. (7) The light switching means is a light scattering type liquid.
And a crystal element. (8) The optical switching means is a bend alignment.
OCB mode liquid crystal with a phase compensator arranged in front of the liquid crystal
The configuration was composed of (9) The same image is used for the left-eye image and the right-eye image.
Standard table for displaying normal two-dimensional images by displaying images
The display mode was provided. (10) Stereoscopic display mode for displaying stereoscopic video
Mode and the standard display mode for displaying normal two-dimensional images.
Is provided with a switching means for freely switching. (11) Standard display depending on the type of video signal
Mode or stereoscopic display mode
It is configured to switch automatically. (12) Before and after switching the display mode,
Correction means configured so that the brightness of the display means is substantially the same
It was configured to have a step. (13) The display means is provided in front of the bend alignment liquid crystal.
A structure composed of an OCB mode liquid crystal having a phase compensating plate
Was completed. (14) The display means is a liquid crystal panel,
The liquid crystal layer was made of a ferroelectric liquid crystal. (15) The display means is a liquid crystal panel,
The liquid crystal layer was made of an antiferroelectric liquid crystal. (16) The phase difference Δn · d (retardation) of the liquid crystal layer
Is between 600 nm and 900 nm,
The liquid crystal layer was made of a cyano-based material. (17) The content of the cyano-based material is 10% or less.
The configuration was as follows. (18) The cyano-based material is PCH (phenyl)
(Cyclo-hexane) group. (19) The cyano-based material has a terphenyl group.
The configuration was made of a contained cyano-based material. (20) The thickness of the liquid crystal layer is 2.5 μm or more
The configuration was 3.5 μm or less. (21) The refractive index anisotropy Δn of the liquid crystal layer is 0.5.
24 or more. (22) The viscosity coefficient η of the liquid crystal layer is 30 mPa
-It was set as the structure which is s or more and 60 mPa * s or less. (23) Black display on the liquid crystal panel
The black voltage that applies the voltage for a certain rate in one frame
The liquid crystal layer is driven by PCH (phenyl silicon).
Composition that is a cyano-based material containing a (chloro-hexane) group
And (24) The driving frequency is 300 Hz or less.
Configuration. (25) Black display on the liquid crystal panel
The black voltage that applies the voltage for a certain rate in one frame
And driven at a driving frequency of 360 Hz or more
The liquid crystal layer is a cyano-based material containing a terphenyl group.
Was adopted. (26) The liquid crystal layer is made of a fluoro material.
Was completed. (27) The liquid crystal layer is made of a fluorotolan material
There was a certain configuration. (28) The light source used for the display means is LE
The configuration was made up of D elements. Embodiments of the present invention will be described below.
This will be described with reference to the drawings. (Embodiment 1) First embodiment of the present invention
Will be described with reference to the drawings. FIG. 1 is a vertical sectional view of the first embodiment of the present invention.
It is an overall view showing the configuration of a body display device. In FIG.
1 is a stereoscopic display device, 2 is a display monitor, 3 is a polarizing plate, 4
Is a liquid crystal shutter, 5 is a retardation plate, 6 is polarized glasses, 7
Is an image signal, 8 is an image processing unit, and 9 is a display monitor driving circuit.
The road 10 is a synchronous circuit. FIG. 2 shows a first embodiment of the present invention.
FIG. 2A is a plan view showing a configuration of a display unit in which
In the case of a pixel configuration composed of two types of pixels for the eye and the pixel for the right eye,
FIG. 2B shows the case of a pixel configuration consisting of only one type.
is there. In FIG. 2, reference numeral 11 denotes a pixel portion of the display monitor 2,
11a is a left-eye pixel, and 11b is a right-eye pixel. The image processing to which the image signal 7 for stereoscopic vision is input
The processing unit 8 converts the left-eye image signal and the right-eye image signal into
After being processed, it is sent to the display monitor drive circuit 9 and displayed.
The image signal for the left eye and the right
Ophthalmic image signals are assigned alternately for each field.
The left-eye image and the right-eye image are displayed in time
Are alternately displayed on the same screen of the data 2. display
A polarizing plate 3 and a liquid crystal shutter 4
And the polarizing plate 3 and the liquid
The left-eye image transmitted through the crystal shutter 4 with the left eye
The stereoscopic image can be viewed by selectively viewing the ophthalmic image with the right eye.
Sympathize. Here, the switching of the liquid crystal shutter 4 is performed by the left eye.
Circuit 10 according to switching between the image for use and the image for the right eye
Switch the polarization state to synchronize
I have. The pixel configuration of the display monitor 2 at this time is as follows.
The two types of pixels for the left eye and the right eye in FIG.
In the case of a pixel configuration consisting of only one type shown in FIG.
There are two types of pixel configurations. TN for display monitor
If the response is slow, such as when using a mode liquid crystal,
(A) If the response is fast, select the pixel configuration in FIG. 2 (b)
Then, a bright image can be obtained. As described below
Uses a field sequential color LCD panel
To switch between the left-eye image and the right-eye image.
For example, since sequential driving of RGB is required, 16.6 / 6 =
Because a very high-speed response of 2.8 msec is required,
If the pixel configuration of 2 (a) is applied, the response time is doubled.
It may be delayed by 6 msec.
The range of choice will be expanded. Switching of the liquid crystal shutter 4 is performed by image processing.
Type of left-eye image signal and right-eye image signal sent from unit 8
Synchronized by the synchronization circuit 10 according to the type
Have been. Further, the phase difference plate 5 is
It is for adjusting the color tone by retardation.
You. For space saving as the display monitor 2
When using a liquid crystal display,
Is the most popular transmission type TN mode liquid crystal.
However, in order to obtain a high quality stereoscopic image while maintaining the resolution
Then, both the image for the left eye and the image for the right eye, that is,
It needs to handle twice the amount of video information, so the brightness is half
Below, high-speed switching of left and right images is necessary, etc.
We have to solve various issues. In the case of a TN mode liquid crystal, a CRT is used.
It is difficult to obtain high brightness,
Power consumption increases.
Also, the rise time and fall time of the TN mode liquid crystal
(Hereinafter referred to as “response time” and written as τr + d).
Is about 16 msec even at high speed, and
The left and right images can be displayed within 16.6 msec.
And it is difficult. In order to solve the above problems, the first embodiment
In the embodiment, the display monitor 2 is provided on the front of the bend alignment liquid crystal.
OCB mode liquid crystal field system with phase compensator
A sequential color driving type liquid crystal panel was used. Book
The OCB mode liquid crystal according to the first embodiment has a high transmittance and a high transmittance.
Fast response in 3 msec or less while ensuring reliability
be able to. The configuration will be described below. FIG. 3A shows a first embodiment of the present invention.
Showing the configuration of the liquid crystal panel used in the stereoscopic display device
FIG. FIG. 3B shows a first embodiment of the present invention.
Shows the configuration of the liquid crystal panel used for the stereoscopic display device in Japan
FIG. 3 is an enlarged plan view of a pixel portion. In FIG. 3, 12 is a liquid crystal panel, and 13 is
Backlight, 14 is an array substrate, 15 is a counter substrate, 1
6 is a liquid crystal layer, 17 is a counter electrode, 18 is a pixel electrode, 19 is
A video signal line connected to the pixel electrode 18 and providing a video signal;
20 is a scanning signal line, 21 is a semiconductor switch element, 22 is
A first insulating layer, 23 is a second insulating layer, 24 is a black matrix.
Layer 25a is disposed on the inner surface of the array substrate 14.
25b is an alignment film formed on the inner surface of the counter substrate 15,
26 is an LED light source, 26a is a red LED, 26b is green
LED, 26c is a blue LED, 27 is a reflector, 28 is a lead
It is a light plate. Hereinafter, the operation will be described with reference to FIG.
You. First, if Al, Ti, etc.
And forming the scanning signal line 20 in a predetermined shape.
Perform patterning. The first electrode group thus formed
After the first insulating layer 22 is formed thereon, the first insulating layer 22
A-Si layer and an n + type a-Si layer (
(Not shown) is formed.
I do. Further, the first insulating layer 22 and the semiconductor switch element
A conductor made of Al, Ti, or the like is formed on a predetermined portion of 21.
And a second electrode group including the video signal line 19 is formed in a predetermined shape.
To form a pattern. Next, the array having the second electrode group formed thereon is formed.
A second insulating layer 23 made of SiNx or the like is formed on the substrate 14.
To achieve. The second insulating layer 23 holds the semiconductor switch element 21.
It also serves as a protective film to protect. Further, the pixel electrode 18 is made of a transparent conductor.
It is formed of an ITO film. Thereafter, the array substrate 14 and the counter substrate 1
In FIG. 5, there is a hole for aligning the arrangement of molecules of the liquid crystal layer 16.
The alignment films 25a and 25b made of polyimide or the like are formed. An OCB mode liquid crystal display as in the present invention
In the device, rubbing treatment is performed on the array substrate 14 and the opposing substrate 15.
Parallel alignment, where each direction is parallel.
You. The opposing substrate 15 faces the array substrate 14.
The counter electrode 17 and the black matrix layer 24 are provided
It is formed in a predetermined pattern. The array substrate 14 manufactured as described above,
And the counter substrate 15 each have an initial orientation azimuth in a predetermined direction.
Liquid crystal layer 16 after adhering the periphery with a sealant.
Insert and seal. The semiconductor switch element 21 is connected to the video signal line 19
And a drive signal input from the scanning signal line 20.
On and off. And the semiconductor switch element 21
Between the pixel electrode 18 connected to the
An electric field is generated by the applied voltage, and the liquid crystal layer 16 is arranged.
Display direction by controlling the brightness of each pixel by changing the
You. In the liquid crystal display device of the present invention, the initial
When no pressure is applied, the liquid crystal molecules are almost parallel.
In the play alignment state, this liquid crystal alignment is used for display.
Transition to a bend alignment state. To do this transfer
In addition, a relatively large transition voltage, for example, about 25 V is applied to the liquid crystal layer.
Was applied. An OCB mode liquid crystal display device is composed of a substrate and a liquid
Display by applying voltage to the liquid crystal.
Voltage alignment state when crystal voltage is not applied and display
Different from the display alignment state used in the state, the zero voltage alignment state
By applying a transition voltage from the state to the display orientation state
It is a kind of liquid crystal display element that makes a transition and has a fast response and
A display with a wide viewing angle can be realized. In the first embodiment, a field sequence
Because it is a char- acter color display system,
Indispensable colors for the color liquid crystal display of the trix system
No filters are needed. Instead, backlight 1
3, each color of red (R), green (G) and blue (B) emits light
LED light sources 26a, 26b, 26c
You. The light emitted from the LED light source 26 is
The liquid crystal is reflected at 27 and repeatedly reflected at the light guide plate 28.
The light enters the panel 12. Thus, the liquid crystal panel 12
LED light sources 26a, 26b, 26 for each color of RGB to irradiate
c is switched in time sequence, and the liquid crystal panel 1
2. Addition in time by controlling the light transmission state
Perform color display with mixed colors. With the above configuration, the conventional color filter is used.
Dramatically higher panel transmittance than filters
Not only can you get a bright liquid crystal panel.
In addition, by using an LED of high color purity for the light source 26, N
Compared with the conventional method of 100% or more in TSC ratio
High color reproducibility can be realized. Next, the panel structure according to the first embodiment will be described.
The operation and effect in the formation will be described. JP-A-11-14988 discloses a liquid crystal panel.
It has been proposed to use OCB mode liquid crystal for the panel.
You. OCB mode liquid crystal is certainly other liquid crystal mode such as TN
High-speed response is possible compared to
If a high-speed response of less than c is to be realized, the cell gap
To a narrow gap of 2 μm or less, or
It is necessary to take measures such as reducing the viscosity. However, considering the practical aspect, high speed
Not only the answer but also the transmittance of the panel
It is also necessary to secure reliability at the same time. Origin of the present application
The plaintiffs need fast response, high transmittance, and reliability.
Consider the conditions of OCB liquid crystal panel configuration for compatibility
Was. First, in order to achieve both high-speed response and high transmittance.
In addition, the birefringence anisotropy Δn can be increased to Δn of 0.2 or more.
Contains PCH (phenyl-cyclo-hexane) group
Cyano-based, terphenyl-containing cyano-based,
Liquids roughly classified into four types, namely, fluoro-based and fluorotolan-based
The viscosity of crystalline materials was reduced. In addition, the liquid crystal material
In order to determine only the dependency,
Liquid crystal modulation, excluding the effect of filter transmittance
Transmittance through which light is transmitted (hereinafter referred to as the liquid crystal modulation rate).
U). In the cyano-based material, the cyano content is
In the case of 18%, birefringence anisotropy Δn = 0.28, viscosity η
= 44 mPa · s, and a cell gap of 2.
Response time τr + d = 1.5 msec for 6 μm panel,
A liquid crystal modulation rate of 85% was obtained. However, 60 ° C, 90%
In the high temperature and high humidity test of
10% or more decrease after 500 hours
It is not suitable for practical use because it has problems in terms of properties. A material having a cyano content of 10% was used.
The birefringence anisotropy Δ in a liquid crystal containing a terphenyl group.
n = 0.28, viscosity η = 51 mPa · s, including PCH group
Birefringence anisotropy Δn = 0.27, viscosity η =
A physical property value of 45 mPa · s was obtained, and the cell gap was 2.6.
Response time τr + d = 2 msec for a μm panel,
A conversion of 70% was obtained. Material with 18% cyano content
Although the performance is slightly inferior, at 60 ° C. and 90%
In the high-temperature and high-humidity test, even after 500 hours,
No decrease in pressure holding ratio is seen, and there is no problem in terms of reliability
I understood that. Even when the cyano content is 10%,
Properties η = 37 mPa · s, viscosity η = 34 mPa · s, viscosity
For each material of η = 29 mPa · s, 60 ° C., 90%
Voltage holding ratio in the high temperature and high humidity test of
After 0 hour, a decrease of 10% or more was observed. this is
Caused by the thinning material included to reduce viscosity
Therefore, there is a trade-off between reliability and high-speed response.
Means In the case of a fluoro material, the birefringence is anisotropic.
The physical property value of property Δn = 0.25 and viscosity η = 49 mPa · s
And a response time τ in a panel having a cell gap of 2.6 μm.
r + d = 2 msec, and a liquid crystal modulation rate of 70% was obtained. Shi
Slightly inferior in performance to material with 18% ano content
However, in the high temperature and high humidity test at 60 ° C. and 90%, 5
Even after the lapse of 00 hours, the voltage holding ratio did not decrease.
It was found that there was no problem in terms of reliability. In the fluorotolan-based material, birefringence
Anisotropy Δn = 0.25, viscosity η = 43 mPa · s
Characteristics, and responds to panels with a cell gap of 2.6 μm
Time τr + d = 2 msec, liquid crystal modulation rate 70%
Was. Compared to a material with a cyano content of 18%,
Slightly inferior, but at 60 ° C, 90% high temperature and high humidity test
Even after 500 hours, the voltage holding ratio did not decrease.
And found that there was no problem in terms of reliability.
Was. From the above results, it was found that the cyano content of 10%
Any of ano, fluoro, and fluorotolan
If you try to ensure the reliability of the material,
Time τr + d = 2 msec, liquid crystal modulation rate 70%
(Cell gap 2.6 μm) or response time τr
+ D = 2.2msec, liquid crystal modulation rate 80% specification
(Cell gap 3 μm) is a practical range.
It became clear. Further, in the OCB mode liquid crystal panel,
In liquid crystal orientation, the bend state for normal image display
When the reverse transition state that changes from the splay state to the splay state occurs
There is a problem. Therefore, the black voltage (ie, no
In the case of marie white display, 5-6V for black display
Voltage is applied) at some percentage of one frame.
Has been proposed (hereinafter referred to as "black
Insertion rate). Not yet in reverse transition
To prevent this, it is necessary to increase the black insertion rate.
However, the time during which the liquid crystal is substantially in the ON state (hereinafter
Below, called “time aperture ratio”)
The transmittance is substantially reduced and the efficiency is reduced.
Become. Therefore, the feel of the OCB mode liquid crystal
When using the sequential color method, the light source
To maximize efficiency, besides the liquid crystal modulation rate,
Total efficiency including time aperture ratio including black insertion ratio
You have to judge. Therefore, the condition of the required minimum black insertion ratio
Clarified. As a result, the black insertion rate depends on the type of liquid crystal material,
And it depends on the driving frequency. Ma
In addition, the black insertion rate varies depending on the operating temperature,
It has been found that a higher black insertion rate is required.
Therefore, considering practical use, use at high temperatures
The minimum black insertion rate should be determined in anticipation. For a simple cell sample using each liquid crystal material,
When driving at each frequency with operating temperature of 80 ° C,
The required minimum black insertion rate was determined. Liquid crystal materials used in experiments
Is 500 hours in a high temperature and high humidity test at 60 ° C. and 90%
No decrease in voltage holding ratio is observed even after elapse, all reliability
It is thought that there is no problem in. From these results, the following is apparent.
became. (1) In each case, 100H
A peak occurs at z to 120 Hz.
The minimum black insertion ratio may be smaller as the wave number increases.
I will be. (2) When driving at triple speed of RGB,
That is, when driving at 180 Hz, a PCH-cyano system is used.
The material requires only a black insertion rate of 10% or less, but PCH-shear
A black insertion ratio of 15% or more is required for materials other than the non-based materials. In order to prevent color breakup, RGB RGB
Must drive at 6x speed, 360Hz
In some cases, black insertion rate of 15% or less for any material
The response time and liquid crystal modulation rate specifications.
The liquid crystal material may be determined at the center. Note that black insertion is field sequential.
It is not necessary for color OCB mode liquid crystal
No, set a white voltage that does not reverse transition without black insertion
There are also ways to master it. In that case, drive the black insertion rate
Since there is no need to consider the wave number dependence,
Needless to say, there is no need to select the type of liquid crystal material.
not. As described above, the liquid crystal material, the cell gap,
Depending on the combination of the refractive index anisotropy Δn and the driving method,
Then, an optimal panel configuration may be determined for each. In the first embodiment, the liquid crystal material
A terphenyl group-containing cyano content of 10%
Phase material Δn · d (retardation)
Panel configuration to be 600 nm or more and 900 nm or less
And Specifically, the birefringence anisotropy Δn of the liquid crystal material is
0.25, and the cell gap was set to 3 μm. Next, using this OCB liquid crystal,
Driving method for 3D display with sequential color method
Details of the method will be described with reference to FIG. FIG.
3D display by B field sequential color drive
Writing, liquid crystal response, and
The timing chart of each of the lights is shown. In the first embodiment, one frame
During 16.6 msec, R, G,
After writing each field of B, for the image for the right eye
Write the R, G, and B fields. At this time,
Write black over the entire surface between fields. this is,
In addition to preventing color mixing between fields,
Prevents liquid crystal from reverse transition from bend alignment to splay alignment
It also has the effect of stopping. In each field, from writing to back-up
16.6 / 6 = including light emission and black writing on the entire surface
It must be completed in 2.8 msec or less. this
The time t5 of the entire black writing at the time is at least
What is necessary is just the time t4 required for the fall. Also,
The actual aperture ratio that determines the brightness of the liquid crystal panel 12 is
The product of the modulation rate, the transmittance of the member, and the temporal aperture ratio
Decided. That is, the rise time t2 of the liquid crystal and the fall time
The time t4 is shortened, and the R, G, and B light emission times t
3 (holding time) makes the liquid crystal panel 12 clearer.
This leads to lower power consumption. Therefore, the liquid crystal panel 12 has a liquid crystal
It is desirable that the adjustment rate is high and a high-speed response can be achieved.
CB liquid crystals are suitable. For example, in high-speed OCB liquid crystal
Falling time t4 should be 0.5 msec or less.
Therefore, the entire black writing time t5 is substantially equal to t4.
It can be set to the same 0.5 msec or less. The OCB liquid crystal panel according to the first embodiment
The response time τr + d at a cell gap of 3 μm
= 2.2 msec, liquid crystal modulation rate of 80%
Therefore, it is suitable for this driving method. Depending on the surrounding environment and the displayed image, color
As a unique issue of the field sequential method, Iwayu
In some cases, the problem of “color breakup” may become significant. For example,
When looking at the white image, the time-dependent shift on the screen
It becomes misaligned above and is perceived as a color break. rapid
Scenes with moving objects, or when the human gaze moves rapidly
If (saccade), the residual color of the R, G, B signals on the retina
R, B, or Y, which is a mixed color of G and R,
(Yellow), C (cyan) which is a mixed color of G and B, etc.
But it is perceived that the periphery of W (white) is colored
I will. As one of the countermeasures against this color breakup, RGB color
At least one neutral color field in addition to the three primary colors
One frame by the frame sequential method
There is a method of displaying an image. That is, one frame is
R, G, B3 primary colors and their intermediate color fields, and so on
If it is formed of a white (W) field (hereinafter referred to as “R
GBW drive ”). With this configuration
Display time of each field is short,
The color signal of the previous field caused by the time lag is added.
The part that appears is whitish. Also slightly before and after
The added color signals B and R are very inconspicuous colors.
You. Therefore, display with almost no color breakup
Becomes possible. In addition, two or more intermediate colors between RGB
Drives inserted, for example, YBGRC, YBWGRC
Such a drive system is more effective against color breakup.
Was called. In the driving method according to the first embodiment,
The case of RGB driving has been described.
If the method is used, color breakage can be reduced, and higher quality
It is possible to obtain an excellent three-dimensional image. In the first embodiment, each color
Driving method to write black all over the field at once
As an example, the black filter is placed between each color field.
The same effect can be obtained with the
Needless to say. In each field, from writing to back-up
16.6 / 8 = including light emission and full black writing
It must be completed within 2.1 msec.
It is important to increase the speed of the liquid crystal. In this case, a liquid crystal capable of a higher speed response
A panel, for example a ferroelectric liquid crystal having a V-shaped characteristic, or
It is desirable to use antiferroelectric liquid crystals. In the first embodiment, the display
The liquid crystal shutter 4 is provided on the entire surface of the monitor 2 and
Although the optical glasses 6 are used for observation, the display
Only the polarizing plate 3 is provided on the monitor 2, and the liquid crystal shutter is mounted on the glasses.
Observe by wearing liquid crystal shutter glasses equipped with -4
A configuration may be used. (Embodiment 2) Second embodiment of the present invention
Will be described with reference to the drawings. The second embodiment is largely different from the first embodiment.
The difference is that the parallax barrier is in front of the display monitor.
This method does not require wearing glasses.
You. FIG. 5 is a vertical sectional view showing a second embodiment of the present invention.
It is an overall view showing the configuration of a body display device. 6 and 7
Stereoscopic view (Parallax) according to the second embodiment of the present invention
FIG. 2 is a plan view showing the principle of (stereogram). In FIG. 5, 29 is a spacer, and 30 is a spacer.
Lalux barrier, 31 is observer, 32 is observer position
A detection unit, 33 is a data processing unit, 34 is a phase inversion control circuit
It is. As in the first embodiment, the image for the left eye and the image for the right eye
Images are assigned alternately for each field and displayed in time sequence.
It is displayed on the same screen of the indication monitor 2. First, the principle of stereoscopic viewing is shown in FIGS.
This will be described with reference to FIG. FIG. 6 (a) shows an image for the left eye viewed by the left eye 31a.
Of stereoscopic vision (parallax stereogram)
Shows the principle. FIG. 6B shows the view at that time.
Display monitor 2 and parallax barrier viewed from the perspective
FIG. 3 is a diagram showing a positional relationship with a reference numeral 30. Similarly, FIG. 7A shows the right eye 31b for the right eye.
Stereoscopic viewing of images (Parallax / stereogram)
Ram) principle. FIG. 7 (b) shows that time.
Display monitor 2 and parallax bar
FIG. 3 is a diagram showing a positional relationship with a rear 30. An image processor provided with a stereoscopic image signal 7
The processing unit 8 processes the left-eye image signal and the right-eye image signal.
After being processed, it is sent to the display monitor drive circuit 9 and
The image for the left eye and the image for the right eye are displayed alternately on the monitor 2.
You. The parallax barrier 30 is a liquid crystal panel.
Electronic shutter that can be shielded from light
Patterned like a stripe for left-eye observation
And a light-shielding portion 30b for right-eye observation are formed.
Have been. Formed on the parallax barrier 30
Changing the polarity of the voltage applied to the electrode unit (not shown)
, The left eye 31a and the right eye 31b
It is a mechanism that only each image can be seen alternately
I have. FIGS. 6 and 7 show the left-eye pixel 1 at this time.
1a, right eye pixel 11b, and parallax barrier
30 shows the positional relationship with the observer 31. this
In order to obtain such a positional relationship, the pixels 11a for the left eye and
Between the pixel 11b for the right eye and the parallax barrier 30
It is necessary to maintain a predetermined distance in the second embodiment.
In the above, spacer 2 made of acrylic transparent resin etc.
9 was used. When the left-eye pixel 11a is displayed, FIG.
A barrier is formed at the position of the light blocking part 30a for left eye observation in FIG.
The left-eye pixel 11a is visible only to the left eye 31a and the right eye
31b becomes invisible. The right eye pixel 11b is
When shown, the light shielding unit 30b for right eye observation in FIG.
And a right-eye pixel only in the right eye 31b
11b can be seen and cannot be seen by the left eye 31a. This
Is switched by the phase inversion control circuit 34.
Image signal for the left eye sent from the image processing unit 8
And the type of image signal for the right eye by the synchronization circuit 10
It is configured to synchronize. The stereoscopic display device 1 has an observer position detection.
Section 32 is provided, and the measured position of the observer is
As a result of the arithmetic processing performed by the data processing unit 33,
The generation pattern of the lux barrier 30 is the position of the observer 31
Optimum by controlling the phase and interval according to the position
This is a mechanism that can obtain a simple stereoscopic image. In the second embodiment, the parallax
The barrier 30 also has a function as an optical shutter.
It is. The function of this optical shutter is 1 frame.
16.6 msec for the left eye image and the right eye image
16.6 / 2 = 8.3m
On / off switching is required in seconds. But,
If a TN mode liquid crystal is used for this optical shutter,
Even if the response time τr + d is fast, it is about 16 msec.
Because it does not follow this switch, it is recognized as blurred
There was a problem that was. Therefore, in the second embodiment,
OCB as liquid crystal panel for parallax barrier 30
Mode liquid crystal was used. OCB mode liquid crystal is 5msec
The following high-speed response is possible, so switching between left and right eyes
In addition to eliminating blur caused by the
That blurring caused by white floating is eliminated
There is a The response time τr + d at this time is 5 m
sec. is enough, so this OCB mode liquid crystal panel
The configuration of the cell is such that the cell gap is 5 μm to 7 μm.
Is also enough. Also, a liquid crystal for the parallax barrier 30
A light scattering type liquid crystal element may be used as the panel. Light scattering
-Type liquid crystal element switches between scattering state and transmission state
It is not necessary to use a polarizing plate to switch
And a very bright image can be obtained. However,
Since the response speed is not as fast as OCB mode liquid crystal,
Any one of the liquid crystal panels may be selected accordingly. Further, the display monitor 2 is provided with the first embodiment.
Similarly, a phase compensator is placed in front of the bend alignment liquid crystal.
Field sequential color of OCB mode liquid crystal
A driving liquid crystal panel was used. The same pattern as in the first embodiment is used.
3ms while ensuring high transmittance and reliability by the tunnel configuration
High-speed response can be achieved below ec. Liquid at this time
The structure of the crystal panel and its operating principle are the same as in the first embodiment.
Therefore, it is omitted here. With the above configuration, the second embodiment
The stereoscopic display method and stereoscopic display device in the
LCD panel transmission compared to the method using a color filter
Since the rate is dramatically improved, the conventional parallax Bali
A high-brightness, high-quality three-dimensional display that could not be achieved with the
Obtain a flat panel stereoscopic display device that can provide a method
be able to. (Embodiment 3) Third embodiment of the present invention
Will be described with reference to the drawings. The third embodiment is largely different from the first embodiment.
The difference is that the 3D image
Switch between image (3D image) and normal image (2D image)
It is a point that was changed. FIG. 8 is a vertical sectional view showing a third embodiment of the present invention.
It is a block diagram showing composition of an input part of a body display device. Figure
In 8, 35 is a switching unit, and 9 a is a two-dimensional display drive.
The moving unit 9b is a three-dimensional display driving unit. First, in the image processing unit 8, the input
Whether the image signal is a three-dimensional image signal or a two-dimensional image signal
to decide. Based on the determined result, the switching unit 35 displays
Two-dimensional display drive provided in the display monitor drive circuit 9
The appropriate driving is performed by the unit 9a or the three-dimensional display driving unit 9b.
Movement will be made. In case of 3D image signal
Is for observing a stereoscopic image using the same algorithm as in the first embodiment.
Becomes possible. On the other hand, when the image signal is a two-dimensional image signal, 2
The left-eye pixel and the right-eye pixel are driven by the three-dimensional display driver 9a.
By sending the same image signal to both,
Can be displayed. (Embodiment 4) A fourth embodiment of the present invention
Will be described with reference to the drawings. The fourth embodiment is the same as the third embodiment.
Depending on the type of input image signal,
In this example, the display is switched to
A parallax barrier is provided in front of the
The difference is that you don't need to put on the gun. FIG. 9 is a vertical sectional view showing a fourth embodiment of the present invention.
It is a block diagram showing composition of an input part of a body display device. Figure
In 9, 35 is a switching unit, and 9 a is a two-dimensional display drive.
The moving part, 9b is a three-dimensional display driving part, and 9c is a signal correcting part.
You. First, in the image processing section 8, the input
Whether the image signal is a three-dimensional image signal or a two-dimensional image signal
to decide. Based on the determined result, the switching unit 35 displays
Two-dimensional display drive provided in the display monitor drive circuit 9
The appropriate driving is performed by the unit 9a or the three-dimensional display driving unit 9b.
Movement will be made. In case of 3D image signal
Is for observing a stereoscopic image using the same algorithm as in the first embodiment.
Becomes possible. On the other hand, when the image signal is a two-dimensional image signal,
With the Lalux Barrier 30 turned off, a two-dimensional table
The display drive unit 9a converts the pixel into both the left-eye pixel and the right-eye pixel.
Send the same image signal. At this time, compared to the three-dimensional display, the pixel
The aperture ratio increases by an amount equivalent to twice the
The image is always bright. Therefore, the two-dimensional image signal
And the 3D image signal are mixed, the 2D
The brightness will change drastically between display and 3D display.
And it is very annoying and also causes eye fatigue. Therefore, in the fourth embodiment, the display
A signal correction unit 9c in the monitor driving circuit 9 for
The difference in brightness between the display and the three-dimensional display is almost the same.
A mechanism is provided to make adjustments. With such a configuration, two-dimensional display and three-dimensional display
Eliminating the sense of incongruity that occurs when switching between two-dimensional displays
Can be. Also, after switching once, 2
If the 3D display continues, watch the image with a bright image if possible.
If you want to make an
A changeover switch may be provided so as to switch. As described above, the liquid crystal display according to the present invention has the following advantages.
The indicating device has the following effects. sand
In other words, a liquid crystal shutter is provided on the front of the display monitor and polarized.
How to observe 3D images with glasses or monitor for display
3D display with liquid crystal shutter glasses with a polarizing plate on the front of the
The left eye image on the display monitor.
The image and the image for the right eye are displayed on the same screen and provided in front of it.
How to observe 3D images with parallax barrier
(1) Even if a liquid crystal panel is used for the monitor,
Enhancing the light use efficiency in total, such as
Enables bright images without increasing power consumption.
An image can be obtained. (2) Even if a liquid crystal panel is used for the monitor,
Since a fast response can be realized, no afterimages remain,
Rui does not appear to flicker and is fixed to stereoscopic vision.
It is possible to reduce the feeling of having fatigue. (3) Light source composed of high color purity LED
Field sequential color method using
Therefore, a three-dimensional display with good color reproducibility can be obtained. As described above, the space-saving type and the fatigue
A 3D that allows you to observe a high-quality 3D display without a sense of labor
Since a display method and a stereoscopic display device can be provided.
The industrial value is extremely large.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view illustrating a configuration of a stereoscopic display device according to a first embodiment of the present invention. FIG. 2 is a plan view illustrating a configuration of a display unit according to the first embodiment of the present invention. (A) Pixel configuration diagram consisting of two types of left-eye pixels and right-eye pixels (b) Pixel configuration diagram consisting of only one type FIG. 3 (a) Stereoscopic display device according to first embodiment of the present invention FIG. 4B is an enlarged cross-sectional view showing a configuration of a liquid crystal panel used in the first embodiment of the present invention. FIG. Timing charts for writing to liquid crystal, liquid crystal response, and backlight in the stereoscopic display method according to the first embodiment. FIG. 5 is an overall view showing the configuration of a stereoscopic display device according to a second embodiment of the present invention. A solid according to the second embodiment of the present invention. FIG. 7 is a plan view showing the principle of visual perception (parallax stereogram). FIG. 7 is a plan view showing the principle of stereoscopic vision (parallax stereogram) in the second embodiment of the present invention. FIG. 9 is a block diagram illustrating a configuration of an input unit of a stereoscopic display device according to a third embodiment. FIG. 9 is a block diagram illustrating a configuration of an input unit of a stereoscopic display device according to a fourth embodiment of the present invention. FIG. 1 shows a configuration example of a video display device [Description of reference numerals] 1 stereoscopic display device 2 display monitor 3 polarizing plate 4 liquid crystal shutter 5 phase difference plate 6 polarizing glasses 7 image signal 8 image processing unit 9 display monitor drive circuit 9a Two-dimensional display drive unit 9b Three-dimensional display drive unit 9c Signal correction unit 10 Synchronous circuit 11 Display monitor pixel unit 11a Left eye pixel 11b Right eye pixel 12 Liquid crystal panel 13 Backlight 14 Ray substrate 15 Counter substrate 16 Liquid crystal layer 17 Counter electrode 18 Pixel electrode 19 Video signal line 20 Scanning signal line 21 Semiconductor switch element 22 First insulating layer 23 Second insulating layer 24 Black matrix layer 25 Alignment film 26 LED light source 26a Red LED 26b Green LED 26c Blue LED 27 Reflector 28 Light guide 29 Spacer 30 Parallax barrier 30a Light shield 30b for left eye observation Light shield 31 for right eye observer 31a left eye 31b right eye 32 observer position detector 33 Data processing unit 34 Phase inversion control circuit 35 Switching unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) G09G 3/20 611 G09G 3/20 611E 5C080 621 621A 641 641E 642 642D 642E 650 650B 660 660X 3/34 3 34 J 3/36 3/36 F term (reference) 2H059 AA23 AA26 AA33 AA38 2H088 EA06 EA07 GA02 GA04 HA06 HA16 HA28 JA17 JA20 KA07 2H093 NA65 NC43 NC44 ND08 ND10 ND17 ND32 NE06 NF04 NF17 A22A17 A22A00 AF27 AF44 AF51 AF53 AF73 BA12 BA13 BA15 BA16 BB12 BB16 BB28 BB29 BC03 BC11 BF24 EA01 EA03 EC12 FA04 FA05 FA12 FA16 FA23 FA24 FA25 FA34 FA47 FA54 FA55 FA56 5C061 AA03 AA11 AA14 AB12 AB14 AB16 AB17 5C080 AA03 DDB DD DD DD EE29 EE30 FF11 JJ02 JJ04 JJ06

Claims (1)

  1. Claims: 1. A display means for alternately assigning a left-eye image and a right-eye image for each field and displaying them on the same screen in a time-sequential manner; A stereoscopic display method for observing a stereoscopic image by selectively viewing the left-eye image and the right-eye image for the left eye in synchronization with the switching of the eye image, wherein the display unit includes: An optical switching unit; a light source for irradiating the optical switching unit; and a driving unit for switching the color of the light source in a time-sequential manner and controlling a transmission or reflection state of the optical switching unit in synchronization with the switching. A three-dimensional display method characterized by performing color display with mixed colors. 2. A display means for alternately assigning a left-eye image and a right-eye image for each field and displaying them on the same screen in a time-sequential manner, and switching between the left-eye image and the right-eye image. A stereoscopic display device for observing a stereoscopic image by selectively viewing a left-eye image for the left eye and a right-eye image for the right eye in synchronization with each other. A three-dimensional display device, comprising: a left-eye pixel portion for displaying an image; and a right-eye pixel portion for displaying a right-eye image. 3. The display means comprises: a liquid crystal panel; a light source for irradiating the liquid crystal panel; and a driving means for switching a color of the light source in time sequence and controlling a transmission or reflection state of the liquid crystal panel in synchronization with the switching. The stereoscopic display device according to claim 2, wherein the stereoscopic display device is a field sequential color system that performs color display by temporal additive color mixture. 4. A parallax barrier comprising a display means for displaying an image for the left eye and an image for the right eye on the same screen, an image for the left eye for the left eye, and a right image for the right eye. A stereoscopic display method for observing a stereoscopic image by selectively viewing an image for an eye, wherein the display unit includes a light switching unit, a light source that irradiates the light switching unit, and a color of the light source in time sequence. A three-dimensional display method, comprising: driving means for switching and controlling the transmission or reflection state of the optical switching means in synchronization with the switching, and performing color display with temporal additive color mixture. 5. A display device for displaying an image for the left eye and an image for the right eye on the same screen, and a parallax barrier, wherein the left eye has an image for the left eye and the right has an image for the right eye. A stereoscopic display device for observing a stereoscopic image by selectively viewing an image for an eye, wherein a display unit of the display unit includes a pixel unit for a left eye for displaying an image for a left eye, and an image for a right eye. A right-eye pixel portion for displaying the liquid crystal panel, the display means switches a liquid crystal panel, a light source for irradiating the liquid crystal panel, and a color of the light source in time sequence, and synchronizes with the liquid crystal panel in synchronization therewith. A three-dimensional display device comprising a driving means for controlling a transmission state or a reflection state of the light, and a field sequential color system for performing color display by temporal additive color mixture. 6. The parallax barrier according to claim 5, wherein the parallax barrier is constituted by optical switching means.
    3. The stereoscopic display device according to 1. 7. A three-dimensional display device according to claim 6, wherein said light switching means is a light scattering type liquid crystal element. 8. The three-dimensional display device according to claim 6, wherein said optical switching means is an OCB mode liquid crystal having a phase compensator disposed in front of a bend alignment liquid crystal. 9. A standard display mode for displaying a normal two-dimensional image by displaying the same image for the left-eye image and the right-eye image.
    The stereoscopic display device according to any one of 3, 5 to 8, above. 10. The stereoscopic display according to claim 9, further comprising a switching unit for freely switching between a stereoscopic display mode for displaying the stereoscopic video and a standard display mode for displaying a normal two-dimensional image. apparatus. 11. The three-dimensional display device according to claim 10, wherein the display mode is automatically switched to one of the standard display mode and the three-dimensional display mode depending on the type of the video signal. 12. Before and after the switching of the display mode,
    The stereoscopic display device according to claim 9, further comprising a correction unit configured to make the brightness of the display unit substantially the same. 13. The three-dimensional liquid crystal display according to claim 2, wherein said display means is an OCB mode liquid crystal in which a phase compensator is disposed in front of a bend alignment liquid crystal. Display device. 14. The display means is a liquid crystal panel,
    13. The three-dimensional display device according to claim 2, wherein the liquid crystal layer is a ferroelectric liquid crystal. 15. The display means is a liquid crystal panel,
    13. The three-dimensional display device according to claim 2, wherein the liquid crystal layer is an antiferroelectric liquid crystal. 16. The three-dimensional display device according to claim 13, wherein the liquid crystal layer has a phase difference Δn · d (retardation) of not less than 600 nm and not more than 900 nm, and the liquid crystal layer is a cyano-based material. 17. The stereoscopic display device according to claim 16, wherein the content of the cyano-based material is 10% or less. 18. The three-dimensional display device according to claim 13, wherein the cyano-based material contains a PCH (phenyl-cyclo-hexane) group. 19. The method according to claim 1, wherein the cyano-based material is a cyano-based material containing a terphenyl group.
    3. The stereoscopic display device according to 3. 20. The stereoscopic display device according to claim 13, wherein the thickness of the liquid crystal layer is 2.5 μm or more and 3.5 μm or less. 21. The liquid crystal layer has a refractive index anisotropy Δn of 0.1.
    14. The three-dimensional display device according to claim 13, wherein the number is 24 or more. 22. The liquid crystal layer has a viscosity coefficient η of 30 mPa.
    14. The stereoscopic display device according to claim 13, wherein the pressure is not less than s and not more than 60 mPas. 23. A black voltage for applying a voltage for displaying black in the liquid crystal panel is driven by being inserted at a fixed rate in one frame, and the liquid crystal layer contains a PCH (phenyl / cyclo / hexane) group. 14. The three-dimensional display device according to claim 13, wherein the three-dimensional display device is a cyano-based material. 24. The three-dimensional display device according to claim 23, wherein the driving frequency is 300 Hz or less. 25. A black voltage for applying a voltage for displaying black in the liquid crystal panel is inserted at a constant rate in one frame, and is driven at a driving frequency of 360 Hz or more. The stereoscopic display device according to claim 13, wherein the stereoscopic display device is a cyano-based material containing: 26. The stereoscopic display according to claim 25, wherein the liquid crystal layer is made of a fluoro material. 27. The stereoscopic display device according to claim 25, wherein the liquid crystal layer is made of a fluorotolan material. 28. A light source used for the display means is LE
    28. The three-dimensional display device according to claim 2, comprising a D element. 29. A method for forming one frame by performing four or more fields by sequentially performing four or more fields obtained by adding a field of an intermediate color excluding the three primary colors to three fields of red, green, and blue to the driving means. The stereoscopic display device according to any one of claims 2, 3, 5 to 28, wherein: 30. A method according to claim 2, wherein said driving means is a method of forming one frame by sequentially performing three fields of red, green, and blue twice in a plane.
    The stereoscopic display device according to any one of 3, 5 to 28. 31. The three-dimensional display device according to claim 29, wherein the intermediate color is white. 32. The three-dimensional display device according to claim 29, wherein the intermediate color is one of cyan, magenta, and yellow. 33. The stereoscopic display device according to claim 29, wherein the intermediate color is a combination of any two or more of cyan, magenta, yellow, and white. 34. The intermediate color is a combination of any three of cyan, magenta, yellow, and white,
    30. The stereoscopic display device according to claim 29, wherein the intermediate color fields are respectively inserted between red, green, and blue color fields. 35. The three-dimensional display device according to claim 29, wherein a black field is inserted between the respective color fields. 36. The three-dimensional display device according to claim 29, wherein black is written on the entire surface between the respective color fields.
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