JP2001166259A - Spectacles-less stereoscopic video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which enables even an observer who is before or behind an optimum view position to view a stereoscopic image. SOLUTION: A display 1a with a light shield means is divided into three areas. A light shield part of the light shield means can be moved, area by area, by 1/4 of the light shield part pitch. In the 1/4 movement, an image passes corresponding to individual ranges after 'shifting'. A video display surface is also divided into areas corresponding to the mentioned area divisions and the display order of striped left- and right-eye images is controlled by the areas. The 1/4 movement is not performed in an area H2 but in areas H1 and H3. Further, only in the area H1, the left- and right-eye images are switched. In this case, the right-eye image passes through L1' from the area H1 and enters the right eye of the observer 2, the right-eye image passes through R2 from the area H2 and enters the right eye, and the right-eye image passes through R2' from the area H3 and enters the right eye. Thus, only the right-eye image can be supplied to the right eye of the observer 2 having moved back from the optimum observation position D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display apparatus without glasses, which can recognize a stereoscopic image by following the position of the head of an observer without using special glasses.

[0002]

2. Description of the Related Art A parallax barrier method and a lenticular lens method are generally known as methods for displaying a stereoscopic image without requiring special glasses. When these are used for a liquid crystal display panel to constitute a three-dimensional image display device without glasses, the resolution of the liquid crystal panel is limited, so that a two-lens type three-dimensional image display device without glasses is usually used in many cases. In the case of the two-lens system, as shown in FIG. 1, a right-eye image and a left-eye image are displayed on the liquid crystal display panel 200 every other vertical line. The lenticular lens and the parallax barrier (not shown) move the right-eye image and the left-eye image between the eyes E when the observer 2 is at the optimum observation position D.
Is designed to be observed alternately at a pitch of.

In FIG. 1, "..., R, R1, R2, R3,
“R4,...” Is a right-eye image observable area.
L1, L2, L3,... "Are left-eye image observable areas. Accordingly, as shown in FIG. 2, when the observer's right eye is in the right-eye image observable area and the left eye is in the left-eye image observable area, the observer can recognize the stereoscopic image. In the image observation region of each eye, since the image of the corresponding eye is collected from the entire screen, as shown in FIG. 3, for example, when attention is paid to the R2 region in front of the screen, the image actually moves slightly back and forth. There is also an observable range at the position where it is located. That is, since the right-eye image can be reached from the entire screen in the rectangular area G in the figure, the right-eye image can be observed at the upper end or the lower end of the rectangular area G. Further, the light passing through the R2 region does not reach any region other than the hatched region in the figure.

According to the above-described principle, the right-eye image observable area and the left-eye image observable area are each a square area (hatched) shown in FIG. Therefore, as shown in FIG. 5, when the right eye of the observer 2 is in the right-eye image observation square region and the left eye is in the left-eye image observation square region, stereoscopic vision is possible. Will be unable to view stereoscopically.

As a method of expanding the stereoscopic viewable range,
For example, Japanese Patent Application Laid-Open No. 9-152668 (IPC: G0
3B 3/00), observer 2
When the observer 2 is located in a so-called reverse viewing area where the left eye image is observed by the observer's right eye and the right eye image is observed by the left eye, a right eye image displayed on the liquid crystal display panel 200 is detected. There is a method of exchanging the left eye image. Also, Japanese Patent Application Laid-Open No. 9-197
No. 344 (IPC: G02B 27/22)
A liquid crystal panel or the like is used so that a light-shielding barrier or a parallax barrier having a slit-shaped opening disposed between a liquid crystal display panel and a backlight can be moved by a quarter pitch (barrier movement) with respect to the pitch. The disclosed configuration is disclosed. With this configuration, the square area shown in FIG. 4 can be moved by E / 4, and each image can be observed in the white square area as shown in FIG. That is, the right-eye image observable area, which is "..., R, R1, R2, R3, R4, ...", is changed to "..., R ', R1', R".
2 ', R3', R4 ', ... ", and" ..., L, L1,
L2, L3,... ”
"..., L ', L1', L2 ', L3', ...".

Therefore, it is possible to supply a stereoscopic image slightly in the front-rear direction even at the boundary between the right-eye image and the left-eye image before performing the barrier movement. By optimally controlling the movement of the barrier and the barrier on the light-shielding plate and the switching between the right-eye image and the left-eye image displayed on the liquid crystal display panel 200, the right-angle image and the white-line image shown in FIG. The observation of the eye image or the left eye image becomes possible, and the stereoscopic viewing range is expanded.

[0007]

However, in the above-described conventional configuration, when the observer moves largely backward, for example, as shown in FIG. 7, stereoscopic vision cannot be performed. That is, as shown in FIG. 8, the right eye of the observer 2 displays the left-eye image B
Right-eye image passing through R2 from the region, and L from the region C
2 is observed, and the observer 2 sees moire on the boundary between the A region, the B region, and the C region on the screen. This corresponds to the boundary of the L1 R2 L2 area. As described above, when the observer 2 greatly shifts in the front-rear direction from the stereoscopically observable position, the observer 2 observes both the right-eye image and the left-eye image, so that stereoscopic vision becomes impossible.

In view of the above circumstances, the present invention provides a stereoscopic image display device without glasses that enables an observer to perform stereoscopic vision at that position even when the observer is far away from an appropriate viewing position in the front-back direction. The purpose is to provide.

[0009]

In order to solve the above-mentioned problems, a stereoscopic image display apparatus according to the present invention comprises: an image display means for alternately displaying a left-eye image and a right-eye image in a stripe; In a stereoscopic image display device without glasses, comprising: a light-shielding means configured to be able to move the position of a light-shielding portion that produces an effect, and a sensor that detects the position of the observer's head, the light-shielding means is moved in the horizontal direction. The image forming apparatus further includes an area division movement control unit that divides the area and performs movement control of the position of the light shielding unit for each area according to the position of the observer's head.

Preferably, the light-shielding means is configured to move the position of the light-shielding portion at a quarter pitch of the light-shielding portion pitch.

Here, for example, when the right-eye image passes between the normally arranged light-shielding portions from one of the two regions and the right-eye image from the other region passes between the normally-arranged light-shielding portions, As described above, the right eye image is supplied to the right eye of the observer at the appropriate viewing position. On the other hand, the right-eye image is １ ／
When passing between the light-shielding portions in the pitch-shifted arrangement and the right-eye image from the other area passes between the light-shielding portions in the normal arrangement,
The supply range of the right-eye image is shifted forward or backward of the suitable viewing position. Therefore, when the observer's head moves to the shifted position, by performing the above-described movement control of the light shielding unit, a right-eye image can be supplied to the shifted right eye of the observer. Sometimes, the left eye image is supplied to the left eye of the observer, so that the observer can recognize the stereoscopic video.

The display section of the image display means is also divided into areas corresponding to the area division of the light shielding means, and the display order of the striped left-eye image and right-eye image is changed for each area according to the position of the observer's head. It is preferable to provide display control means for controlling.

Here, for example, in one area, a right eye image is output from a position where a left eye image is normally output,
When the right-eye image passes between the light-shielding portions in the normal arrangement and the right-eye image from the other region passes between the light-shielding portions in the arrangement shifted by 1/4 pitch, the supply range of the right-eye image is the optimum viewing position. Will be shifted forward or backward. Therefore, when the observer's head moves to the shifted position, the right-eye image is supplied to the observer's right eye by performing the above-described movement control of the light shielding unit and display control of the image display unit. In this case, since the left eye image is supplied to the left eye of the observer, the observer can recognize the stereoscopic video.

[0014] The image display means may comprise a liquid crystal display panel, and the light shielding means may be a light shielding barrier disposed between the liquid crystal display panel and a light source which emits light in a plane disposed on the back side thereof. Good. The light blocking means may be a parallax barrier disposed on the light emission side of the image display means. It is preferable that the light shielding means is composed of a liquid crystal panel. It is preferable to increase the number of divisions as the observer's head moves away from the appropriate viewing position. It is desirable to divide the area equally.
It is preferable to control each area so that an image for the eye is supplied to the eyes of the observer. The light-shielding portion of the light-shielding means may be configured to disappear in an arbitrary region, and a two-dimensional image may be displayed in a display region corresponding to the region where the light-shielding portion has disappeared.

The light-shielding means is characterized by comprising a constant light-shielding portion and a liquid crystal shutter portion provided on both sides of the liquid-crystal shutter for turning on and off.

Preferably, the aperture ratio corresponding to the boundary between the divided areas of the light shielding means is controlled to be substantially constant.

The liquid crystal shutters provided on both sides of the constant light-shielding portion with the opening corresponding to the boundary portion therebetween so that the aperture ratio becomes substantially constant, so that the liquid crystal shutters are in the same group as the liquid crystal shutters in other adjacent regions. It is good to wire.

As described above, by controlling the aperture ratio at the boundary portion so as not to change, the occurrence of bright lines and black lines can be prevented.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to FIG.
25 will be described with reference to FIG.

(Summary) The three-dimensional image display apparatus without glasses according to this embodiment is structurally disclosed in Japanese Unexamined Patent Publication No. 9-197344, in which a light-shielding portion in a light-shielding means for generating a binocular parallax effect is provided. , For example, 1
It can be moved by / 4 pitch. In such a structure, the light-shielding means is divided into regions in the horizontal direction, and the number of divisions according to the position of the observer and one in each region are determined.
In addition to determining the presence / absence of the / 4 pitch movement, the image display of the display area corresponding to the above area is controlled.

FIG. 9 shows a state in which the observer 2 is watching the stereoscopic image display device 1 without glasses. Sensors 101 that detect the position of the head of the observer 2 are attached to both upper ends of the stereoscopic image display device 1 without glasses. FIG. 10 and FIG.
Reference numeral 1 denotes a case where the display 1a with light shielding means is divided into three areas H1, H2 and H3 when the sensor 101 detects that the head of the observer 2 has moved as shown in FIG. When there is no 1/4 pitch movement in the light shielding means, the right-eye image and the left-eye image respectively pass through the regions marked with R and L, which are described as "before shift" in the figure, and When there is a pitch shift, R '.
The right-eye image and the left-eye image each pass through the area marked with L '. When the arrangement of the right-eye image and the left-eye image is switched, the left-eye image originally passes through the R and R 'regions through which the right-eye image passes, and the L and R regions through which the left-eye image originally passes.
The right-eye image passes through the L 'region.

In the state shown in FIG. 10, the right-eye image passes through L1 'from the H1 region and enters the right eye of the observer 2, and the right-eye image passes through R2 from the H2 region and enters the right eye of the observer 2. Enter, H
From the three regions, the right eye image passes through R2 'and enters the right eye of the observer 2. That is, the observer 2 sees only the right eye image with his right eye. FIG. 11 shows a state in which the same control is performed for the quarter-pitch movement in the light blocking means of FIG. 10 and for switching between the right-eye image and the left-eye image, and the left-eye image passes through R2 'from the H1 region and is observed. The left eye of the observer 2 enters the left eye of the observer 2 from the H2 region through the L2, and enters the left eye of the observer 2 from the H3 region through the L2 '. . That is, the observer 2 sees only the left eye image with his left eye. Such control enables stereoscopic vision even when the head of the observer 2 is shifted backward from the appropriate viewing range.

As shown in FIG. 12, the above-mentioned stereoscopic image display device 1 includes, for example, a liquid crystal panel 20, a light-shielding barrier 10 arranged on the viewer side of the liquid crystal panel 20, and a flat light source 30. Is done.

This light-shielding barrier 10 is, as described later,
It is configured such that a part of the light shielding portion can be turned on / off (generated / disappeared). In this embodiment, a TN type liquid crystal panel is used as a light shielding barrier.

The liquid crystal panel 20 includes a light incident side glass substrate 23, a light exit side glass substrate 24,
A liquid crystal layer 25 provided between 3 and 24, a light incident side polarizing plate 26 attached to the light incident side glass substrate 23, and a light emitting side polarizing plate 27 attached to the light emitting side glass substrate 24. Have. The liquid crystal panel 20 is driven by, for example, a matrix driving method, and an image is displayed by applying a voltage to a transparent pixel electrode (not shown) according to an image signal. Then, by processing the video signal supplied to the liquid crystal panel 20, the image R for the right eye and the image L for the left eye are alternately displayed every other vertical line.

The T disposed on the light exit side of the liquid crystal panel 20
The light-shielding barrier 10 composed of an N-type liquid crystal panel has a liquid crystal layer 13 provided between two glass substrates 11 and 12, and a light incident side polarizing plate 14 provided on the viewer 2 side. The polarizing plate on the light incident side of the TN type liquid crystal panel uses the polarizing plate 27 of the liquid crystal panel 20 for forming an image. The light-shielding barrier 10 made of a TN-type liquid crystal panel has a transparent electrode made of ITO or the like patterned on the inner surfaces of the glass substrates 11 and 12, so that the light-shielding portion can be electrically turned on and off. Further, it has a function of moving the light-shielding portion of the light-shielding barrier 10 by 1/4 of its pitch. For example, in order to realize this function, a transparent electrode for turning on and off the light-shielding portion is subdivided. Thus, the light shielding unit can be moved. The light-shielding part is turned on so that one opening corresponds to two display pixels of the liquid crystal panel 20, and separates the light transmitted through the liquid crystal panel 20 into left and right parts, so that the image for the left eye is observed by the observer 2. The image for the right eye is provided to the right eye 2R of the observer 2 to the left eye 2L.

FIG. 13 is a sectional view showing an example of the structure of the light-shielding barrier 10 constituted by the above-mentioned liquid crystal panel. In this liquid crystal panel, a liquid crystal layer 13 is provided between two glass substrates 11 and 12. Each glass substrate 11, 1
Polarizing plates 14 and 16 are provided on the outer surface of 2. Of these two polarizing plates 14 and 16, the polarizing plate on the liquid crystal panel 20 side for displaying an image can be shared with the polarizing plate of the liquid crystal panel 20. These polarizing plate 14 and polarizing plate 1
6 are attached so that the polarization axes are perpendicular to each other. In the figure, the polarizing plate of the light-shielding barrier 10 and the polarizing plate of the liquid crystal panel 20 for displaying images are commonly used. A transparent electrode 15 is formed on the entire inner surface of one glass substrate 12. The transparent electrode 15 is made of, for example, ITO.

On the other glass substrate 11, the light-shielding portion 1
0b is formed of a black pigment, and regions 10a1 and 10a2 that are light-shielding portions only in the first state and regions 10c1 and 10c2 that are light-shielding portions only in the second state are formed of transparent electrodes. Actually, as shown in the figure, the transparent electrode and the light-shielding portion are formed so as to slightly overlap each other so that no gap is formed.

When no voltage is applied to all the transparent electrodes, the polarization axis of the light selected by the polarizing plate 422 is
3 rotates 90 degrees according to the rotation of the liquid crystal, and the polarizer 14
Come out through. However, only the light that is going to enter the light shielding unit 10 at all times is shielded.

The above-mentioned constant light shielding portion 10b and transparent electrode 1
0a1 (10a2) and 10c1 (10c2) are used to enable stereoscopic viewing without using glasses when the light blocking unit is on.
The pitch (Q) of the two pixels of the liquid crystal panel 20 is formed such that the pair of the light shielding portion 10b and one of the transparent electrodes always corresponds to each other. The transparent electrode 10a1 (10a
2) 10c1 (10c2) is for enabling the movement of the light-shielding portion, and one of the electrodes is turned on corresponding to the position of the observer 2. The transparent electrode 10a1 (10a
2) The width of 10c1 (10c2) is always the light shielding portion 10b
The portion which does not overlap with Q is formed with Q / 4. Therefore, by switching on / off of the transparent electrode, the light-shielding portion of Q / 4 can be moved. These transparent electrodes 10a1
The (10a2), 10c1 (10c2) portions constitute a liquid crystal shutter.

(Description of Specific Configuration) FIG. 14 is a block diagram showing the configuration of a stereoscopic video display device without glasses. In this block diagram, the present invention is adapted to color display.

The output from the sensor 101 for detecting the position of the observer 2 is given to a position detection control circuit 102. The position detection control circuit 102 determines the position of the head of the observer 2 based on the output of the sensor 101. It is detected whether or not there is, and a control signal corresponding to the position is given to the display signal generation circuit 100 and the light-shielding barrier division control circuit 115.

The display signal generation circuit 100 generates a left-eye video signal and a right-eye video signal and supplies them to the liquid crystal display panel 20. On the liquid crystal display panel 20, a right-eye image and a left-eye image are basically displayed every other vertical line.
The display signal generation circuit 100 determines the number of screen divisions based on the control signal in addition to the basic operation of switching the supply of the left-eye video signal and the right-eye video signal based on the control signal from the position detection control circuit 102 The switching between the left-eye video signal and the right-eye video signal is controlled for each divided screen.

The specific configuration of the display signal generation circuit 100 will be described. The first input terminal 106a is supplied with a left-eye video signal which is a composite signal composed of a luminance signal Y and a color difference signal C, and the second input terminal 106b is composed of a composite signal composed of a luminance signal Y and a color difference signal C. A right-eye video signal, which is a signal, is provided. The left-eye video signal is converted into red, green, and blue primary color signals by a first decoder 107a, and the right-eye video signal is converted into red, green, and blue primary color signals by a second decoder 107b. . Each primary color signal is composed of the first and second A
The data is converted into digital data by the / D converters 108 a and 108 b and provided to the multiplexer 109.

The multiplexer 109 includes first and second A
First switch unit 109 for selecting one of the two red primary color data input from / D converters 108a and 108b
a, a second switch 109b for selecting one of the two green primary color data input from the first and second A / D converters 108a and 108b, and a first and second A / D converter 108a , 108b to select one of the two blue primary color data. The multiplexer 109 is connected to the first switch unit 10
9a selects the red primary color data for the right eye from the second A / D converter 108b, and the second switch 109b selects the first A
The third switch unit 109c selects the green primary color data for the left eye from the A / D converter 108a,
8b, a first selection state (shown by a solid line) for selecting blue primary color data for the right eye, and the first switch unit 109a
, The red primary color data for the left eye is selected from the A / D converter 108a, the second switch unit 109b selects the green primary color data for the right eye from the second A / D converter 108b, and the third switch unit The state 109c is switched to the second selection state (shown by a broken line) for selecting the blue primary color data for the left eye from the first A / D converter 108a. The first selection state and the second selection state basically correspond to the liquid crystal display panel 2.
The switching is performed in each of the first and second data output periods (one dot clock) in one horizontal scanning period at 0.

The synchronizing signal separating circuit 111 separates a horizontal / vertical synchronizing signal from the left-eye signal input to the first input terminal 106a, and supplies the synchronizing signal to the timing signal generating circuit 112. The timing signal generation circuit 112
The first and second decoders 107a and 107a, 10
7b, first and second A / D converters 108a and 108b,
It generates a timing signal for controlling the timing at which the multiplexer 109 and the liquid crystal display panel 20 operate.

The light-shielding barrier division control circuit 115 controls on / off of the liquid crystal shutter section in the light-shielding barrier 10,
The positions of the light transmitting part and the light shielding part of the light shielding barrier 10 are controlled.
The light-shielding barrier 10 includes a light-transmitting portion and a light-shielding portion in the form of a vertical stripe. In this embodiment, a parallax barrier disposed between the liquid crystal display panel 20 and the viewer 2 is employed. Of course, a configuration in which the liquid crystal display panel 20 is disposed between the liquid crystal display panel 20 and a light source (not shown) that emits light in a planar shape may be employed. The pitch of the light shielding portion in the light shielding barrier 10 is
It is determined by the pixel pitch of the liquid crystal display panel 20 used. The width of the liquid crystal shutter unit is set to one-fourth of the pitch, as described above, so that the light-shielding barrier 10 can move the light-transmitting part and the light-shielding part by a quarter of the pitch of the light-shielding part. Is done.

The position detection control circuit 102 outputs a first control signal to the timing generation circuit 112 and the light-shielding barrier division control circuit 115 when the position of the observer's 2 head is located in the normal viewing area of the liquid crystal display panel 20. When the position of the head of the observer 2 is located in the reverse viewing area of the liquid crystal display panel 20 (where the right eye views the left-eye image and the left eye views the right-eye image, respectively), the second control signal is generated in timing. The third control signal is output to the circuit 112 and the light-shielding barrier division control circuit 115, and when the head position of the observer 2 is in a region (moire region) of approximately E / 4 to 3E / 4, the third control signal is output to the timing generation circuit 11.
2 and the light-shielding barrier division control circuit 115.

Further, when the position of the observer's 2 head deviates from the suitable viewing range by a predetermined distance or more, the position detection control circuit 102 outputs the fourth control signal to the timing generation circuit 112.
And the light-shielding barrier division control circuit 115. The fourth control signal differs depending on whether the position of the head of the observer 2 has deviated from the suitable viewing range in the forward direction or the backward direction, and further, the degree of the departure (distance from the suitable viewing range). . That is, due to this difference, a predetermined combination determines the number of divided areas, the presence or absence of a quarter-pitch movement of the light-shielding portion in each area, and the presence or absence of switching of the display order of the right-eye image and the left-eye image in each area. . This will be described later in detail.

When the observer 2 is located in the emmetropic region and the first control signal is given to the timing generating circuit 112, the timing generating circuit 112 displays a picture element arrangement for the emmetropic region on the liquid crystal display panel 20. The first selection state and the second selection state in the multiplexer 109 are switched so as to be formed. That is, the liquid crystal display panel 2
On 0, the first red pixel (right eye image) → first green pixel (left eye image) → first blue pixel (right eye image) → second red pixel (left eye image) → second pixel 2 Green pixels (right eye image) →
The image is displayed as a second blue pixel (left eye image) → a third red pixel (right eye image). Then, when the first control signal is given to the light-shielding barrier division control circuit 115, the light-shielding barrier division control circuit 115
The positions of the light transmitting part and the light shielding part for the standard viewing area are changed to the light shielding barrier 10.
A liquid crystal shutter on / off control signal is applied to the light-shielding barrier 10 so as to be formed thereon.

On the other hand, when the observer 2 is located in the
Is supplied to the timing generation circuit 112, the timing generation circuit 112 causes the first selection state of the multiplexer 109 to be formed on the liquid crystal display panel 20 so that the picture element arrangement for the reverse viewing area is formed. And the second selection state. That is, the first red pixel (left-eye image) is displayed on the liquid crystal display panel 20.
Green pixel (right eye image) → first blue pixel (left eye image)
→ The second red pixel (right-eye image) → the second green pixel (left-eye image) → the second blue pixel (right-eye image) → the third red pixel (left-eye image) Will be displayed. On the other hand, the positions of the light transmitting part and the light shielding part on the light shielding barrier 10 are set to be the same as those for the standard viewing area. Note that changing the image display as described above is referred to as “LR image switching”.
I will express it.

When the observer 2 is located in a region (Moire region) of approximately E / 4 to 3E / 4 based on the standard viewing region, and when a third control signal is given to the timing generation circuit 112, the timing generation circuit 112 On the liquid crystal display panel 20 is the same as for normal vision (for example, when the observer 2 moves to the right in the figure) or the same as for reverse vision (for example, when the observer 2 moves to the left in the figure). The first selection state and the second selection state in the multiplexer 109 are switched so that a picture element arrangement is formed. Then, when the third control signal is given to the light-shielding barrier division control circuit 115, the light-shielding barrier division control circuit 115 determines that the light-shielding portion of the light-shielding barrier 10 is １ ／ pitch observer based on the standard viewing area. A liquid crystal shutter on / off control signal is given to the light-shielding barrier 10 so as to shift in the direction opposite to the moving direction of the shutter 2.
The movement of the light-shielding portion by ピ ッ チ pitch as described above is hereinafter referred to as “barrier movement”.

Next, the case where the observer 2 moves out of the suitable viewing range back and forth and the fourth control signal is output to the timing generation circuit 112 and the light-shielding barrier division control circuit 115 will be described below. Here, when the fourth control signal is output, the light-shielding barrier 10 is divided into regions in the horizontal direction, and execution / non-execution of barrier movement is set for each region. The light-shielding barrier division control circuit 115 controls this setting. The liquid crystal display panel 20 is also divided into regions corresponding to the above-mentioned regions, and execution / non-execution of LR image switching is set for each region. The timing generation circuit 112 controls this setting. Execution of LR image switching
The combination (control) of non-execution and execution / non-execution of barrier movement is performed according to Tables 1 to 4 described later.

[Case where the liquid crystal display panel is divided into two parts] (When the position of the head of the observer 2 deviates backward from the suitable viewing range) FIG. 15 shows that the barrier movement is not performed in the H1 area of the display 1a with the light shielding means. This shows a state in which barrier movement is performed in the H2 area without performing LR image switching in both areas. In this state, from the H1 region to R1
The range in which the right-eye image that has passed through is visible within the left-sided thick rectangle in the figure, and the range in which the right-eye image that has passed through R1 'from the H2 region is visible is within the left-side thick dotted line rectangle in the figure. Therefore, H
The range in which the right-eye image can be simultaneously viewed from the one area and the H2 area is the shaded area in the figure. Also, the range in which the left-eye image passing through L1 from the H1 region is visible is within the thick bold rectangle on the right in the figure, and the range in which the left-eye image passing through L1 'is visible from the H2 region is within the bold dotted right rectangle in the figure. It is. Therefore, the range in which the left-eye image can be simultaneously viewed from the H1 region and the H2 region is the lattice pattern range in the figure.

FIG. 16 shows a range in which the right-eye image can be simultaneously viewed from the H1 area and the H2 area by a bold polygon (white outline). In the figure, the range marked with is the same as in FIG.
As in the case of (1), the H1 area corresponds to the case where there is no barrier movement, the H2 area has barrier movement, and both areas correspond to the case where there is no LR image switching.

In the range, the H1 area has a barrier movement,
The H2 area is a case where there is no barrier movement, and only the H2 area has LR image switching. In this range, the range in which the right-eye image passing through R1 'from the H1 region can be seen overlaps with the range in which the right-eye image passing through L1 from the H2 region can be seen.

The range is that no barrier movement occurs in the H1 area,
The H2 area corresponds to the case where the barrier movement has occurred, and both areas have the LR image switching. In this range, the range in which the right-eye image passing through L1 from the H1 region is visible and the range in which the right-eye image passing through L1 'from the H2 region are visible.

In the range, the H1 region has a barrier movement,
The H2 region is a case where there is no barrier movement, and only the H1 region has LR image switching. In this range, the range in which the right-eye image passing through L1 'from the H1 region is visible and the range in which the right-eye image passing through R2 from the H2 region are visible.

The liquid crystal display panel is divided into two regions (H1, H2), and the presence or absence of the LR image switching of each region (H1, H2) when the position of the head of the observer 2 deviates from the suitable viewing range to the rear. The combinations of the presence / absence of the barrier movement in the regions (H1, H2) are the above four types (〜). From (1
Table 1 below shows combinations of the presence / absence of LR image switching in each region (H1, H2) and the presence / absence of barrier movement in each region (H1, H2) in the range of 3). Note that the control of Table 1 ensures that the right eye image of the observer 2 is supplied to the right eye, and the left eye almost enters the left eye image.

[0050]

[Table 1]

The area where the right-eye image can be seen and the area where the left-eye image can be seen tend to be separated as the distance from the appropriate viewing range increases. However, since the distance between eyes is almost the distance between eyes, stereoscopic vision is possible in a considerable range. . In the case where the distance is shifted from the interocular distance, it is preferable to control the eye of the observer 2 with priority.
That is, if the eye of observer 2 is the right eye, FIG.
By performing the above-described control depending on the range (to (13)) of the right eye, the right eye image is reliably supplied to the right eye of the observer 2, and the left eye image is substantially supplied to the left eye. Will be supplied.

[Case where the liquid crystal display panel is divided into two parts] (When the position of the head of the observer 2 is deviated forward from the appropriate viewing range) FIG. 17 shows the H1 region of the liquid crystal display 1a with the light shielding barrier. This shows a state in which barrier movement is performed, barrier movement is not performed in the H2 area, and LR image switching is not performed in both areas. In this state, for example, the range in which the right-eye image that has passed through R1 'from the H1 region is visible is within the bold rectangle on the left in the figure, and the range from the H2 region to R1 is
The range in which the right-eye image that has passed through is visible is within the thick dotted square on the left side of the figure. Therefore, the range in which the right-eye image can be simultaneously viewed from the H1 region and the H2 region is a hatched region in the drawing. Also, the range in which the left-eye image passing through L1 'from the H1 region is visible is within the thick bold rectangle on the right in the drawing, and the range in which the left-eye image passing through L1 is visible from the H2 region is within the bold dotted right rectangle in the drawing. It is. Therefore, the range in which the left-eye image can be simultaneously viewed from the H1 region and the H2 region is the lattice pattern range in the figure.

FIG. 18 shows, by polygons (white outlines), the range in which the right-eye image can be simultaneously viewed from the H1 area and the H2 area. In the figure, the range indicated by is the case where the H1 region has barrier movement, the H2 region has no barrier movement, and both regions have no LR image switching, as in the case of FIG. 17 described above.

In the range, the H1 region has no barrier movement,
This is a case where the barrier movement has occurred in the H2 area and the LR image has been switched only in the H1 area. In this range, the range in which the right-eye image passing through L1 from the H1 region is visible and the range in which the right-eye image passing through R1 'from the H2 region are visible.

In the range, the H1 region has a barrier movement,
The H2 region is a case where there is no barrier movement and both regions have LR image switching. In this range, the range in which the right-eye image passing through L1 'from the H1 region is visible and the range in which the right-eye image passing through L1 from the H2 region are visible.

In the range, the H1 region has no barrier movement,
This is a case where the H2 area has a barrier movement and only the H2 area has an LR image switch. In this range, the range in which the right-eye image passing through R2 from the H1 region is visible and the range in which the right-eye image passing through L1 'from the H2 region are visible.

The liquid crystal display panel is divided into two regions (H1, H2), and the presence / absence of LR image switching of each region (H1, H2) when the position of the head of the observer 2 is deviated forward from the suitable viewing range. The combinations of the presence / absence of the barrier movement in the regions (H1, H2) are the above four types (〜). From (1
Table 2 below shows combinations of the presence / absence of LR image switching in each region (H1, H2) and the presence / absence of barrier movement in each region (H1, H2) in the range of 3). In addition, the control of Table 2 ensures that the right eye image of the observer 2 is supplied to the right eye, and the left eye almost enters the left eye image.

[0058]

[Table 2]

The area where the right-eye image can be seen and the area where the left-eye image can be seen tend to come closer as the distance from the appropriate viewing range increases, but since the distance between eyes is near the eye distance, stereoscopic viewing is possible in a considerable range. . In the case where the distance is shifted from the interocular distance, it is preferable to control the eye of the observer 2 with priority.
That is, if the eye of the observer 2 is the right eye, FIG.
By performing the above-described control depending on the range (to (13)) of the right eye, the right eye image is reliably supplied to the right eye of the observer 2, and the left eye image is substantially supplied to the left eye. Will be supplied.

FIG. 19 shows, in gray, the range in which the right-eye image can be simultaneously viewed from the H1 and H2 regions in FIG. 16 and the range in which the right-eye image can be simultaneously viewed from the H1 and H2 regions in FIG. ing. Also,
In this figure, a bold line area indicates a normal (no area division) image supply range. When the observer 2 exists within the image supply range in the thick line area, normal control (control without area division) is performed, and when the observer 2 is out of the range, the above-described control with area division is performed. Will be. Note that when the observer 2 exists in the P1 area shown in FIG. 20, normal control (control without area division) is performed.
The control with the above-mentioned area division may be performed when the value goes out of this range.

[Case where the liquid crystal display panel is divided into three parts] (When the position of the head of the observer 2 deviates backward from the suitable viewing range) FIG. 21 shows a barrier in the H2 region of the display 1a with light shielding means. No movement, H1 area and H
This shows a state in which barrier movement is performed in three areas and LR image switching is performed only in the H1 area. In this state, for example, the range in which the right-eye image passing through L1 'from the H1 region is visible is within the bold rectangle on the left side in the drawing, and the range in which the right-eye image passing through R2 is visible from the H2 region is in the left side of the drawing. The range within which the right-eye image passing through R2 'from the region H3 is visible is within the thick dashed-dotted rectangle on the left side of the figure. Therefore, the range in which the right-eye image can be simultaneously viewed from the H1, the H2, and the H3 regions is a hatched range in the drawing. Also,
The range in which the left-eye image passing through R2 'from the H1 region is visible is within the bold rectangle on the right in the figure, and the range in which the left-eye image is passing through L2 from the H2 region is within the bold dotted rectangle on the right in the diagram. The range in which the left-eye image that has passed through L2 'from the H3 region is visible is within the bold dashed-dotted rectangle on the right in the figure. Therefore, H
The range in which the left-eye image can be simultaneously viewed from the one area, the H2 area, and the H3 area is the grid pattern area in the drawing.

FIG. 22 shows the range in which the right-eye image can be simultaneously viewed from the H1, H2, and H3 regions by a bold polygon (white outline). In the drawing, the ranges marked with are the same as in the case of FIG. 21 described above, where the barrier movement has occurred in the H1 region and the H3 region, the barrier movement has not occurred in the H2 region, and the LR has occurred only in the H1 region.
This corresponds to the case with image switching.

The liquid crystal display panel is divided into three regions (H1, H2, H
3), the presence or absence of LR image switching in each region (H1, H2, H3) and the barrier in each region (H1, H2, H3) when the position of the observer's 2 head deviates from the suitable viewing range to the rear. There are four combinations of the presence or absence of movement (for example,
(10), (11)). Table 3 below shows combinations of the presence / absence of LR image switching in each region (H1, H2, H3) and the presence / absence of barrier movement in each region (H1, H2, H3) in the range from (13) to (13). Note that the control of Table 3 ensures that the right eye of the observer 2 is supplied with the right-eye image, and that the left eye contains almost the left-eye image.

[0064]

[Table 3]

The area where the right-eye image can be seen and the area where the left-eye image can be seen tend to separate as the distance from the appropriate viewing range increases. However, since the distance between the eyes is almost the same, the stereoscopic vision is possible in a considerable range. . In the case where the distance is shifted from the interocular distance, it is preferable to control the eye of the observer 2 with priority.
That is, if the eye of the observer 2 is the right eye, FIG.
By performing the above-described control depending on the range (to (13)) of the right eye, the right eye image is reliably supplied to the right eye of the observer 2, and the left eye image is substantially supplied to the left eye. Will be supplied.

[Case where the liquid crystal display panel is divided into three parts] (When the position of the head of the observer 2 is deviated forward from the appropriate viewing range) FIG. 23 shows a barrier in the H2 region of the display 1a with light shielding means. No movement, H1 area and H
A state is shown in which barrier movement is performed in three areas and LR image switching is performed only in the H3 area. In this state, the range in which the right-eye image passing through R2 'from the H1 region is visible is within the thick rectangular frame on the left in the drawing, and the range in which the right-eye image passing through R2 is visible from the H2 region is the thick dotted line on the left in the drawing. The range within which the right-eye image passing through L1 'from the H3 region is visible is within the rectangle indicated by the thick dashed-dotted line on the left in the figure. Therefore, the range in which the right-eye image can be simultaneously viewed from the H1, the H2, and the H3 regions is a hatched range in the drawing. The range in which the left-eye image passing through L2 'from the H1 region is visible is within the right bold frame rectangle in the figure, and the range in which the left-eye image passing through L2 is from the H2 region is within the bold dotted rectangle at the right in the figure. And H
The range in which the left-eye image that has passed through R2 'from the three regions is visible is within the thick dashed-dotted rectangle on the right in the figure. Accordingly, the range in which the left-eye image can be simultaneously viewed from the H1, H2, and H3 regions is the lattice pattern range in the drawing.

FIG. 24 shows the range in which the right-eye image can be simultaneously viewed from the H1, H2, and H3 regions by a thick polygon (white outline). In the figure, the ranges marked with are the same as in the case of FIG. 21 described above, where the barrier movement has occurred in the H1 and H3 areas, the barrier movement has not occurred in the H2 area, and the LR has occurred only in the H3 area.
This corresponds to the case with image switching.

The liquid crystal display panel is divided into three regions (H1, H2, H
3), the presence / absence of LR image switching in each area (H1, H2, H3) and the barrier in each area (H1, H2, H3) when the position of the head of the observer 2 deviates forward from the appropriate viewing range There are four combinations of the presence or absence of movement (for example,
(10), (11)). Table 4 below shows combinations of the presence / absence of LR image switching in each region (H1, H2, H3) and the presence / absence of barrier movement in each region (H1, H2, H3) in the range from (13) to (13). In addition, the control of Table 4 ensures that the right eye image of the observer 2 is supplied to the right eye, and the left eye almost enters the left eye image.

[0069]

[Table 4]

The area where the right-eye image can be seen and the area where the left-eye image can be seen tend to come closer as the distance from the appropriate viewing range increases, but since the distance between eyes is almost the same, stereoscopic vision is possible in a considerable range. . In the case where the distance is shifted from the interocular distance, it is preferable to control the eye of the observer 2 with priority.
That is, if the eye of the observer 2 is the right eye, FIG.
By performing the above-described control depending on the range (to (13)) of the right eye, the right eye image is reliably supplied to the right eye of the observer 2, and the left eye image is substantially supplied to the left eye. Will be supplied.

FIG. 25 is obtained by adding the range of FIG. 22 and the range of FIG. 24 to FIG. In the figure, the numbered black-painted range is the right-eye image supplyable range increased by the three-division control. Therefore, when the observer 2's head moves to the numbered range, the LR image switching and barrier movement of the three areas are controlled as shown in Tables 3 and 4, and the LR image switching is performed inside the numbered range. When the head of the observer 2 moves, switching to the two-division control may be performed, and the switching of the LR image in two areas and the barrier movement may be controlled as shown in Tables 1 and 2.

[Case where the liquid crystal display panel is divided into four parts] FIG. 26 shows a case where the liquid crystal display panel is divided into four areas and the image supply range is extended behind the suitable viewing range. By performing control based on the same principle as the above-described two-division control and three-division control, the hatched portion in the drawing becomes a right-eye image supplyable range, and the lattice pattern portion in the drawing becomes a left-eye image supplyable range. When the right eye and the left eye are present in the range, stereoscopic vision becomes possible. FIG. 27 is a diagram in which the image is divided into four regions, the image supply range is extended behind and ahead of the appropriate viewing range, and the right-eye image supply range in FIG. 25 is added. In this way, as the number of divisions increases, the stereoscopically viewable range can be further expanded in the rearward or frontward side-by-side rectangular regions. Note that the pitch of the quadrangular region tends to expand rearward and decrease frontward as the distance from the appropriate viewing range increases. However, since the pitch is substantially near the interocular distance, stereoscopic viewing is possible in a considerable range. In the case where the distance is shifted from the interocular distance, it is preferable to control the eye of the observer 2 with priority.

The above-described stereoscopic video display device realizes a stereoscopic projection image display device having a wide stereoscopic range also in the front-rear direction by dividing the screen into a plurality of regions. By the way, if the light-shielding portion of the light-shielding barrier is controlled to be movable, the width of the light-shielding portion becomes constant even at the boundary between the regions. If the width of the light shielding portion is constant at the boundary, a bright line or a black line may be observed depending on the position of the observer. Such a state will be described below.

FIG. 28 is a schematic diagram showing a state in which the observer 2 observes the pixels 20L1, 20L2, 20R2 on the liquid crystal panel 20 through the openings 151, 125 of the light-shielding barrier 10 from an optimum distance. In this case, when the right eye 2R of the observer 2 looks at the center of the pixel 20L1 through the opening 151, it looks at the pixel 20L2 through the opening 152. Therefore, even if the observer 2 moves left and right, the two pixels are similarly hidden by the light shielding unit 150 and become invisible. Therefore, even if there is a boundary between the divided areas at this position, there is no difference in the timing of the movement of the light shielding unit 150 and the switching timing of the left and right images, and it is possible to distinguish from the case where the entire light shielding unit 150 moves simultaneously. Absent.

However, as shown in FIG. 29, for example, when the observer is observing from a distance shorter than the optimum distance, and when looking at the center of the pixel 20L1 through the opening 151, the pixel through the opening 152 Looking at the end of 20L2. If the observer moves left and right in this state, the timing at which the two pixels are hidden by the light shielding unit 150 is different, so that the appearance changes. Therefore, if there is a boundary between the divided areas at this position, a difference occurs in the timing of the movement of the light shielding unit 150 and the switching of the left and right images, which is more optimal than in the case where the entire light shielding unit moves at the same time. It is required to select a state.

As described above, the right and left sides of the boundary are different in the movement of the light shielding unit 150 and the timing of switching between the left and right images with respect to the movement of the observer. FIG. 30 and FIG. 31 show this state. In FIGS. 30 and 31, the left and right light shielding portions are separately controlled with the opening 151 as a boundary. That is, the light shielding units 150B and 150C move at the same time, and the light shielding unit 1505A moves separately. The two lines extending from the pixel indicate the approximate direction of the light beam from the left-eye pixel, and do not mean that the left eye is ahead of the light beam.

FIG. 30 shows an example in which the observer moves to the left at a position closer than the optimum observation distance.
The light-shielding part on the right of moves first. The case where the observer moves to the left in order will be described with reference to FIGS. That is, the state moves to the left state in order from the state of FIG. 30 (a), becomes the state of FIG. 30 (h), and returns to the state of FIG.

In FIG. 30A, the pixel is normally observed through the opening 151. Next, when the observer moves to the left, as shown in FIG.
50C moves to the left. At this time, the opening 151 is narrow and the pixels are difficult to see, so that a black line is visually recognized from the observation position. When the observer moves further to the left, FIG.
In (c), the light shielding unit 150A moves and returns to normal.

Subsequently, as shown in FIG.
When 0B and 150C return to their original positions, the pixel 20L
2 and 20R2 are swapped. At this position, the opening 151 is widened and a bright line is observed from the observation position. In FIG. 30 (e), the pixels 20L1 and 20R1 are exchanged, and the light-shielding portion 150A also returns to its original state, and becomes normal.

Then, in FIG.
Black lines are observed because 50B and 1505C move and the opening 151 narrows. In FIG. 30 (g), the light shielding unit 150A
Will move to normal. In FIG. 30 (h), the light shielding unit 1
When 50B and 150C return to their original positions, the pixel 20
L2 and 20R2 are exchanged and return to the original state. At this position, the opening 151 is widened and a bright line is observed from the observation position. The next state is the same as in FIG.

FIG. 31 shows an example in which the observer moves to the left at a position farther than the optimum observation distance, and the light shielding portion on the left side of the boundary 151 moves first. A case where the observer moves to the left in order will be described with reference to FIGS. That is, the state shown in FIG. 31A is sequentially moved to the left from the state shown in FIG. 31A to the state shown in FIG. 31H, and the state returns to the state shown in FIG. Also in this case, as in the case of FIG. 30, the width of the opening 151 changes, and a bright line or a black line is observed.

FIG. 32 is a perspective view showing only the transparent electrode portion in the configuration near the boundary between the divided regions in the light shielding barrier 10 shown in FIG. FIG. 33 is a configuration diagram showing the grouping of these transparent electrodes. The transparent electrodes 45a1, 45a2, 45b1, 45b2 belong to different groups, each group being grouped by lateral electrodes at the top or bottom of the area. These electrodes are controlled separately for each group.

The transparent electrodes 45a1, 45a of this panel
A voltage of 0 V or a square wave AC voltage can be applied to 2, 45b1, 45b2, and a voltage of 0V is always applied to the transparent electrode 44. Then, the state of the liquid crystal on the transparent electrode to which the AC voltage is applied is aligned, and the polarization axis is not rotated. Therefore, the light incident on this portion cannot pass through the polarizing plate 421, and the light shielding portion 4
6 works as a light blocking part.

Normally, the transparent electrode 45a1 and the transparent electrode 45b1 operate in pairs, and when an AC voltage is applied to the 45a1, 0 V is applied to the transparent electrode 45b1 and an AC voltage is applied to the 45b1. Is the transparent electrode 45
0V is applied to a1. The transparent electrode 45a2 and the transparent electrode 45b2 operate as a pair. When an AC voltage is applied to 45a2, 0 V is applied to the transparent electrode 45b2, and when an AC voltage is applied to 45b2, the transparent electrode 45b is applied.
0V is applied to a2. By changing the transparent electrode to which the voltage is applied as described above, it is possible to change the position of the light shielding portion.

In the case of FIGS. 30 and 31, the transparent electrodes are grouped as shown in FIGS. 32 and 33, and the transparent electrodes 45a1, 45a2, 45
b1 and 45b2 belong to different groups, each group being grouped by lateral electrodes at the top or bottom of the area. These electrodes are separately controlled for each group.

When such electrode grouping is performed,
As described above, the width of the opening 151 changes, and a bright line or a black line may be observed. Therefore, in the embodiment described below, the light-shielding barrier 10 is divided into at least two or more regions, each of which is independently controlled.
(Parallax barrier) is controlled so that the opening width at the boundary between the respective regions does not change. By controlling in this way, it is possible to prevent the occurrence of a bright line or a black line.

In order to control the size of the opening width at the boundary portion of each region so as not to change, as shown in FIG. 34, when forming the transparent electrode, it is necessary to indicate before and after movement of the light shielding portion 150. May be formed so as to belong to different groups adjacent to each other.

Hereinafter, this embodiment will be described with reference to FIGS. 35 and 36. In FIGS. 35 and 36,
The right and left sides are separately controlled with the light shielding unit 150B as a boundary. Therefore, the sizes of the openings 151 and 152 do not change. In order to control in this way, when forming the transparent electrodes, the transparent electrodes used to represent before and after the movement of the light shielding portion 150B may be formed so as to belong to separate adjacent groups.

FIG. 35 shows an example in which the observer moves to the left at a position closer than the optimum observation distance.
The opening 152 on the right side of B moves first. When the observer moves to the left in order, FIG. 35 (a), (b)..., (H)
It will be described according to. That is, the state shown in FIG. 35A is sequentially moved to the left from the state shown in FIG. 35A to reach the state shown in FIG. 35H, and the state returns to the state shown in FIG.

In FIG. 35A, the openings 151 and 152
Through which pixels are normally observed. Next, when the observer moves to the left, the opening 152 moves to the left as shown in FIG. At this time, although the width of the light-shielding portion 1505B is slightly reduced, the width of the opening 152 does not change, and the pixel can be viewed almost normally.

Next, in FIG. 35C, the opening 151 moves. Again, the condition is normal. Further, FIG.
In (d), the width of the opening 152 does not change and is almost normal. Then, the pixels 20R2 and 20L2 are interchanged.

Subsequently, in FIG. 35E, the pixel 2
0R1 and 20L1 are exchanged, and the light shielding unit 150A returns to its original state, which is also normal.

Then, in FIG. 35 (f), the opening 1
Although 52 moves, the width of the opening does not change and is almost normal. In FIG. 35 (g), the light-shielding portion 150A moves, but the width of the opening does not change, and is still normal. FIG.
In 5 (h), at the same time as the opening 152 returns to the original position, the pixels 20L2 and 20R2 are interchanged and returned to the original position. Even at this position, the width of the opening 152 does not change and is almost normal. The next state is the same as in FIG.

FIG. 36 shows an example in which the observer moves to the left side at a position farther than the optimum observation distance.
The opening 151 on the left side of B moves first. Also in this case, similarly, the width of the opening does not change, and no bright line or black line is observed.
That is, when the observer sequentially moves to the left, FIG.
A description will be given according to (a), (b)..., (H). That is, the state is sequentially moved to the left state from the state of FIG.
6 (h), and when it moves further to the left, FIG.
Return to the state of (a).

In FIG. 36A, openings 151 and 152 are shown.
Through which pixels are normally observed. Next, when the observer moves to the left, the opening 151 moves to the left as shown in FIG. At this time, although the width of the light shielding portion 150B is increased, the width of the opening 151 does not change, and the pixel can be viewed almost normally.

Next, in FIG. 36C, the opening 152 moves. Again, the condition is normal. Further, FIG.
In (d), the opening 151 moves. At this time, the width of the opening 152 does not change and is almost normal. Then, the pixels 20R1 and 20L1 are exchanged.

Subsequently, in FIG. 36 (e), the opening 152 further moves, and the light-shielding portion 150A returns to its original position.
R2 and 20L2 are swapped, again normal.

Then, in FIG. 36 (f), the opening 1
Although 52 moves, the width of the opening does not change and is almost normal. In FIG. 36 (g), the opening 152 moves,
The width of the opening does not change and remains normal. FIG.
In (h), at the same time when the opening 151 returns to the original position,
The pixels 20L1 and 20R1 are exchanged, and return to the original state. Even at this position, the width of the opening 151 does not change and is almost normal. The next state is the same as in FIG.

In order not to change the width of the opening at the boundary portion, the transparent electrodes 15c1 and 15c2 may be grouped so that they belong to the same group as shown in FIG. In this case, the transparent electrode 15c1 is not paired with 15a1, but is paired with 15a2 to form an opening. When an AC voltage is applied to the transparent electrode 15c2, 0 V is applied to the transparent electrode 15c1, and when an AC voltage is applied to the transparent electrode 15c1, 0 V is applied to the transparent electrode 15c2. By changing the transparent electrode to which the voltage is applied in this manner, it is possible to control so that the opening at the boundary does not change.

In the above description, only the stereoscopic vision (supply of the three-dimensional image) is performed. However, only one of the divided areas is turned off by the barrier (total transmission; All are constituted by liquid crystal shutters), and a normal two-dimensional image is displayed in the area of the liquid crystal display panel corresponding to this area, whereby partial two-dimensional image display becomes possible. Of course, it is also possible to display a two-dimensional image in the entire area.

[0101]

As described above, according to the present invention, the light shielding means is divided into regions in the horizontal direction, and the movement of the position of the light shielding portion is controlled for each region according to the position of the observer's head. Even when the user moves away from the appropriate viewing position in the front-rear direction, the observer can perform stereoscopic viewing at that position. The display unit of the image display unit is also divided into regions corresponding to the region division of the light-shielding unit, and the display order of the striped left-eye image and right-eye image is changed for each region according to the observer's head position. In the case of controlling, it is possible to eliminate the omission of the range in which the observer performs the stereoscopic vision. By increasing the number of area divisions, even if the observer is far away from the suitable viewing position in the front-rear direction, the observer can perform stereoscopic vision at that position.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an optimum observation position from a liquid crystal display panel and an inter-eye distance of an observer.

FIG. 2 is an explanatory diagram of a state where an observer is located at an optimal observation position.

FIG. 3 is an explanatory diagram showing a path of light passing through an R2 area from the entire screen of the liquid crystal display panel and a rectangular area where a right-eye image can reach from the entire screen.

FIG. 4 is an explanatory diagram showing a range in which a right-eye image or a left-eye image can be completely viewed from the entire screen of the liquid crystal display panel.

FIG. 5 is an explanatory diagram showing a state in which a viewer is slightly away from an optimal observation position, but recognizes a stereoscopic image.

FIG. 6 is an explanatory diagram showing a range in which a right-eye image or a left-eye image can be seen when a light-shielding unit is moved by １ ／ pitch;

FIG. 7 is an explanatory diagram illustrating a state in which a three-dimensional image cannot be recognized because a viewer is away from an optimal observation position.

8 is an explanatory diagram of an image observed by the observer's right eye in the state of FIG. 7;

FIG. 9 is a perspective view showing a stereoscopic image display device without glasses and an observer according to the embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a range in which a complete right-eye image can be seen from the entire screen when the display with light shielding means is divided into three regions and optimal control is performed according to the position of the observer.

FIG. 11 is an explanatory diagram showing a range in which a complete left-eye image can be seen from the entire screen when the display with light shielding means is divided into three regions and optimal control is performed according to the position of the observer.

FIG. 12 is a schematic sectional view showing a configuration of a stereoscopic video display device of the present invention.

FIG. 13 is a cross-sectional view illustrating an example of a light-shielding barrier that is scattered in the present invention.

FIG. 14 is a block diagram showing a configuration of a stereoscopic video display device without glasses of this embodiment.

FIG. 15 is a view showing a complete right-eye image and a left-eye image from the entire screen when the display with light-shielding means is divided into two regions and optimal control is performed when the observer moves backward from an appropriate viewing position. It is explanatory drawing which showed the visible range.

FIG. 16 is an explanatory diagram showing a range in which a right-eye image can be simultaneously viewed from two regions in a bold polygon (open) in FIG. 15;

FIG. 17 shows a case where a display with light shielding means is divided into two regions and optimal control is performed when an observer moves forward from an appropriate viewing position, and a complete right-eye image and a left-eye image of the entire screen are obtained. It is explanatory drawing which showed the visible range.

FIG. 18 is an explanatory diagram showing a range in which a right-eye image can be simultaneously viewed from two regions in a bold polygon (open) in FIG. 17;

FIG. 19 is an explanatory diagram showing, in gray, a range in which the range in which the right-eye image is visible in FIG. 18 and the range in which the right-eye image is visible in FIG. 18 are combined;

FIG. 20 is an explanatory diagram showing, for example, P1 as a range in which normal control (non-split control) is performed in FIG. 17;

FIG. 21 is a view showing a case where a display with light shielding means is divided into three regions and optimal control is performed when the observer moves backward from an appropriate viewing position; It is explanatory drawing which showed the visible range.

FIG. 22 is an explanatory diagram showing a range in which a right-eye image can be simultaneously viewed from three regions in a bold polygon (white outline) in FIG. 21;

FIG. 23 is a diagram showing a case where a display with light shielding means is divided into three regions and optimal control is performed when an observer moves forward from an appropriate viewing position; It is explanatory drawing which showed the visible range.

FIG. 24 is an explanatory diagram showing a range in which a right-eye image can be simultaneously viewed from three regions in a bold polygon (white outline) in FIG. 23;

25 is an explanatory diagram showing the range of FIG. 22 and the range of FIG. 24 in addition to FIG. 19;

FIG. 26 is a diagram showing a complete right-eye image and a left-eye image from the entire screen when the display with light shielding means is divided into four regions and optimal control is performed when the observer moves backward from an appropriate viewing position. It is explanatory drawing which showed the visible range.

FIG. 27 divides the image into four areas, expands the image supply range behind and forward from the appropriate viewing range, and
FIG. 9 is an explanatory diagram in which a right eye image supplyable range is added.

FIG. 28 is a schematic diagram showing a state in which an observer is observing pixels on the liquid crystal panel from an optimal distance through an opening of the light-shielding barrier.

FIG. 29 is a schematic diagram showing a state in which an observer is observing a pixel on the liquid crystal panel through an opening of a light-shielding barrier at a position close to an optimum distance.

FIG. 30 is a schematic diagram illustrating a relationship between a light-shielding barrier and pixels on a liquid crystal panel when an observer moves to the left side of the drawing at a position close to an optimum distance.

FIG. 31 is a schematic diagram showing a relationship between a light-shielding barrier and pixels on a liquid crystal panel when an observer moves to the left side of the drawing at a position far from an optimum distance.

FIG. 32 is a perspective view showing only a transparent electrode portion in a configuration near a boundary between divided regions in the light-shielding barrier shown in FIG. 13;

FIG. 33 is a configuration diagram showing grouping of transparent electrodes of the light-shielding barrier shown in FIG. 32.

FIG. 34 is a configuration diagram showing grouping of transparent electrodes of a light-shielding barrier according to the present invention.

FIG. 35 is a schematic diagram showing a relationship between a light-shielding barrier and pixels on a liquid crystal panel when an observer moves to the left side of the drawing at a position close to an optimum distance.

FIG. 36 is a schematic diagram showing a relationship between a light-shielding barrier and pixels on a liquid crystal panel when an observer moves leftward from the optimum distance in the drawing.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 stereoscopic image display device without glasses 1a display with light shielding means 2 observer 10 light shielding barrier 20 liquid crystal display 100 display signal generation circuit 101 sensor 102 position detection control circuit 112 timing signal generation circuit 115 light shielding barrier division control circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09F 9/00 324 G09F 9/00 324 361 361 361 G09G 3/20 660 G09G 3/20 660X 3/36 3 / 36 H04N 13/04 H04N 13/04

Claims (13)

[Claims] 1. An image display means for alternately displaying a striped left-eye image and a right-eye image, a light-shielding means configured to be able to move a position of a light-shielding portion for producing a binocular parallax effect, and an observer. And a sensor for detecting the position of the head of the subject; and a region dividing movement control unit that divides the light shielding unit into regions in the horizontal direction and controls movement of the position of the light shielding unit for each region according to the head position of the observer. A stereoscopic image display device without glasses, comprising: 2. The three-dimensional image display device without glasses according to claim 1, wherein the light-shielding means is configured to move the position of the light-shielding portion at a quarter pitch of the light-shielding portion pitch. 3. The display unit of the image display means is also divided into areas corresponding to the area division of the light-shielding means, and a stripe-shaped left-eye image and a right-eye image of each area are divided for each area according to the position of the observer's head. The stereoscopic video display device without glasses according to claim 1 or 2, further comprising display control means for controlling a display order. 4. The image display means comprises a liquid crystal display panel, and the light shielding means is a light shielding barrier disposed between the liquid crystal display panel and a light source which emits light in a planar shape disposed on the back side thereof. The stereoscopic image display device without glasses according to any one of claims 1 to 3, characterized in that: 5. The stereoscopic image display without glasses according to claim 1, wherein the light shielding unit is a parallax barrier disposed on a light emission side of the image display unit. apparatus. 6. The three-dimensional image display device without glasses according to claim 1, wherein the light shielding means comprises a liquid crystal panel. 7. The light-shielding means according to claim 1, wherein the light-shielding means comprises a constant light-shielding portion and a liquid crystal shutter portion in which the light-shielding portions provided on both sides thereof are turned on and off. 3. The stereoscopic image display device without glasses according to item 1. 8. The stereoscopic image display device without glasses according to claim 7, wherein an aperture ratio corresponding to a boundary portion between the divided areas of the light shielding unit is controlled to be substantially constant. 9. The liquid crystal shutters provided on both sides of the constant light-shielding portion sandwiching the opening corresponding to the boundary portion are wired so as to be in the same group as the liquid crystal shutters in other adjacent regions. The three-dimensional image display device without glasses according to claim 7 or 8. 10. The stereoscopic video display device without glasses according to claim 1, wherein the number of divisions increases as the head of the observer moves away from the suitable viewing position. 11. The three-dimensional image display device without glasses according to claim 1, wherein the region is divided equally. 12. The stereoscopic video without glasses according to claim 1, wherein each area is controlled so that an image for the eye is supplied to the eye of the observer. Display device. 13. A light-shielding part of the light-shielding means is configured to be able to disappear in an arbitrary area, and a two-dimensional image is displayed in a display area corresponding to the area in which the light-shielding part has disappeared. The stereoscopic image display device without glasses according to any one of claims 1 to 6.