JP2011170241A - Parallax barrier and image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a parallax barrier and an image display device, suppressing deterioration of image quality. <P>SOLUTION: The parallax barrier (step barrier) 4A is combined with a display means (liquid crystal panel) 3 in which a plurality of first pixels 31 and a plurality of second pixels 32 are arrayed respectively, and separates a first image displayed by the first pixel 31 from a second image displayed by the second pixels 32. The parallax barrier includes: a plurality of first transmission parts 43 respectively arranged by corresponding to the first pixels 31 and the second pixels 32, and for transmitting light emitted along a first viewing direction from the first pixels 31 and light emitted along a second viewing direction different from the first viewing direction from the second pixels 32; a light intercepting part for intercepting light emitted in a direction different from the first viewing direction from the first pixels 31 and light emitted in direction different from the second viewing direction from the second pixels 32; and a plurality of second transmission parts 44A formed in the light intercepting part, and for transmitting at least some of light made to be incident from the display means 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a parallax barrier and an image display device.

2. Description of the Related Art Conventionally, a directional display type image display apparatus including a display panel and a parallax barrier (parallax barrier) that separates a first image and a second image formed on the display panel is known (for example, , See Patent Document 1).
In the image display device described in Patent Document 1, a display panel includes a plurality of first pixels and second pixels that display different images, alternately in the column direction and the row direction. On the other hand, the parallax barrier includes a light shielding unit that blocks light emitted from the display panel, and a plurality of transmission units (openings) that transmit the light.

  Such a parallax barrier directs the light of the first image emitted from the first pixel of the display panel in the first viewing direction and directs the light of the second image emitted from the second pixel in the second viewing direction. Thus, the first image and the second image are divided and function as a barrier for displaying in different directions. Specifically, the parallax barrier causes the right-eye image as the first image to enter the right eye of the observer, the left-eye image as the second image to enter the left eye of the observer, and the observer makes these right-eye images. By visually recognizing the left-eye image, a stereoscopic image is observed due to parallax.

Japanese Patent No. 3096613

  However, in the image display device described in Patent Document 1, light emitted from the first pixel and the second pixel in a direction other than the first viewing direction and the second viewing direction is blocked. Therefore, the difference between the luminance of the pixel observed through the transmission portion and the luminance of the portion shielded by the light shielding portion is large. For this reason, it becomes easy to recognize stripe-like interference fringes (moire), and there is a problem that a display image deteriorates.

  An object of the present invention is to provide a parallax barrier and an image display device that can suppress deterioration in image quality.

  In order to achieve the above-described object, the parallax barrier of the present invention is combined with display means in which a plurality of first pixels and second pixels are arranged, and the first image displayed by the first pixel and the second image are displayed. A parallax barrier that separates the second image displayed by the pixels, and is arranged according to the first pixel and the second pixel, and emitted from the first pixel along the first viewing direction. And a plurality of first transmission parts that transmit light emitted from the second pixel along a second viewing direction different from the first viewing direction, and the first viewing direction from the first pixel. A light-shielding portion that blocks light emitted in different directions and light emitted from the second pixel in a direction different from the second viewing direction, and is formed in the light-shielding portion and is incident from the display unit A plurality of second light transmitting at least part of the light; A transmitting portion, and having a.

Here, for example, when the first pixel of the display unit displays the right-eye image as the first image and the second pixel displays the left-eye image as the second image, the parallax barrier is such that the right-eye image is observed. The right eye image is separated with the direction incident on the right eye of the viewer as the first viewing direction, and the left eye image is separated with the direction where the left eye image is incident on the left eye of the viewer as the second viewing direction. .
According to the present invention, at least a part of the light that should be shielded by the light shielding part is transmitted through the second transmission part formed in the light shielding part. That is, a part of the light forming the second image is observed at a position where the first image can be observed through the second transmissive part formed in the light shielding part separately from the first transmissive part. Part of the light forming the first image is observed at a position where the two images can be observed. According to this, compared to the case where the second transmission part is not provided, the area shielded by the light shielding part can be reduced, and the pitch of the area can be reduced. Thus, the difference between the luminance of the pixel visually recognized through the display and the luminance of the region shielded by the light shielding portion can be reduced, and it is difficult to visually recognize moire. Therefore, it is possible to suppress deterioration in the image quality of the display image.

In the present invention, it is preferable that the second transmission part is formed between the plurality of first transmission parts.
According to the present invention, the second transmission part where the first image and the part of the second image light that are originally shielded by the light shielding part are formed is formed between the plurality of first transmission parts. According to this, since the number of regions in which light of each image is observed can be increased, it is possible to improve the fineness of the apparent image.

In the present invention, it is preferable that the second transmission part connects a plurality of adjacent first transmission parts.
According to the present invention, since the plurality of first transmission parts and the second transmission part can be formed as one transmission part, the first transmission part and the second transmission part can be formed in one step. it can. Therefore, it is possible to simplify the process of forming the second transmission part, and thus the parallax barrier.

In the present invention, it is preferable that the second transmission part extends along the row direction.
According to the present invention, since the extending direction of the second transmissive portion is the row direction, even when the parallax barrier is shifted along the row direction and combined with the display unit, the appropriate position of the parallax barrier (the first position) The light of the first image and the second image that should be shielded by the light-shielding part is passed through the second transmission part located on the opposite side to the direction of deviation from the position where the separation ability of the image and the second image is highest. Can be transmitted. According to this, compared with the case where the parallax barrier which does not have a 2nd permeation | transmission part is employ | adopted, the ratio of the light shielded by the light-shielding part among each light radiate | emitted from a 1st pixel and a 2nd pixel is reduced. it can. Therefore, even when the parallax barrier is shifted, it is possible to suppress a rapid decrease in the luminance of the display image.

In the present invention, it is preferable that the second transmission part extends along the column direction.
According to the present invention, similarly to the case described above, even when the parallax barrier is displaced and combined with the display unit along the column direction in the arrangement direction of the second transmission parts, the parallax barrier is not displaced from the appropriate position. The light of the 1st image and the 2nd image which should be shielded by the light-shielding part can be permeate | transmitted via the 2nd permeation | transmission part located in the opposite side to a direction. Therefore, compared with the case where the parallax barrier not having the second transmission part is adopted, the ratio of the light shielded by the light shielding part among the light emitted from the first pixel and the second pixel can be reduced, and the display An abrupt decrease in the brightness of the image can be suppressed.

Or in this invention, it is preferable that the said 2nd permeation | transmission part is extended along the direction which each cross | intersects a row direction and a column direction.
According to the present invention, as in the case described above, even when the parallax barrier is shifted and combined with the display unit along at least one of the row direction and the column direction, the parallax barrier is not shifted from the appropriate position. The light of the first image and the second image that should be shielded from light can be transmitted through the second transmission part located on the opposite side to the direction. Therefore, compared with the case where a parallax barrier not having the second transmission part is adopted, the ratio of the light to be shielded among the respective light emitted from the first pixel and the second pixel can be reduced. An abrupt decrease in the brightness of the image can be suppressed.

In the present invention, it is preferable that the amount of light transmitted through the second transmission portion is less than the amount of light transmitted through the first transmission portion.
Here, as the second transmissive part in which the amount of transmitted light is smaller than that of the first transmissive part, for example, a second transmissive part having a smaller area than the first transmissive part or a process of reducing the transmitted light quantity from the first transmissive part is performed. The second transmission part made can be mentioned.
According to the present invention, the amount of light transmitted through the second transmissive portion is less than the amount of light transmitted through the first transmissive portion, and thus the light of the other image leaks into one of the first image and the second image. The amount (crosstalk value) can be reduced. Therefore, deterioration of each image when the first image and the second image are visually recognized can be further suppressed.

In the present invention, it is preferable that the second transmission unit diffracts and transmits the light incident from the display unit.
According to the present invention, the light transmitted through the second transmission part is diffused by diffraction. According to this, since the second transmission part can be made small, generation of moire can be suppressed while reducing the above-described crosstalk value.

The image display device of the present invention is used in combination with a display unit in which a plurality of first pixels for displaying the first image and a plurality of second pixels for displaying the second image are arranged, and the display unit. And the above-described parallax barrier for separating the first image and the second image.
According to the present invention, the same effect as the above-described parallax barrier can be obtained, and the first image and the second image in which image quality deterioration is suppressed can be displayed.

1 is a cross-sectional view schematically showing a configuration of an image display device according to a first embodiment of the present invention. The schematic diagram which looked at the arrangement state of the sub pixel in the said embodiment planarly. The schematic diagram which looked at the arrangement | sequence state of the 1st permeation | transmission part and the 2nd permeation | transmission part in the said embodiment planarly. The schematic diagram which shows the positional relationship of the sub pixel in the said embodiment, and a 1st permeation | transmission part and a 2nd permeation | transmission part. FIG. 5 is a schematic diagram illustrating a positional relationship between a first transmission unit, a second transmission unit, and sub-pixels when the image display apparatus in the state illustrated in FIG. 4 is viewed with a right eye. The schematic diagram which shows the positional relationship of the 1st permeation | transmission part and 2nd permeation | transmission part at the time of observing with a right eye the image display apparatus when the step barrier in the said embodiment is shifted | deviated upwards. The schematic diagram which shows the positional relationship of the 1st permeation | transmission part and 2nd permeation | transmission part at the time of observing the image display apparatus in case the step barrier in the said embodiment shifted | deviated to the left side with a right eye. The schematic diagram which looked at the array state of the 1st permeation | transmission part of a step barrier with which the image display apparatus which concerns on 2nd Embodiment of this invention and a 2nd permeation | transmission part were planarly viewed. The schematic diagram which shows the positional relationship of the sub pixel in the said embodiment, and a 1st permeation | transmission part and a 2nd permeation | transmission part. FIG. 10 is a schematic diagram illustrating a positional relationship between a sub-pixel, a first transmission unit, and a second transmission unit when the image display apparatus in the state illustrated in FIG. 9 is viewed with the right eye. The schematic diagram which looked at the array state of the 1st permeation | transmission part of a step barrier with which the image display apparatus which concerns on 3rd Embodiment of this invention and a 2nd permeation | transmission part were planarly viewed. The schematic diagram which shows the positional relationship of the sub pixel in the said embodiment, and a 1st permeation | transmission part and a 2nd permeation | transmission part. FIG. 13 is a schematic diagram showing a positional relationship between a sub-pixel, a first transmissive part, and a second transmissive part when the image display apparatus in the state shown in FIG. 12 is viewed with the right eye. The schematic diagram which looked at the arrangement | sequence state of the 1st permeation | transmission part and 2nd permeation | transmission part of a step barrier with which the image display apparatus which concerns on 4th Embodiment of this invention is planarly seen. The schematic diagram which shows the positional relationship of the sub pixel in the said embodiment, and a 1st permeation | transmission part and a 2nd permeation | transmission part. FIG. 16 is a schematic diagram illustrating a positional relationship between a sub-pixel, a first transmission unit, and a second transmission unit when the image display apparatus in the state illustrated in FIG. 15 is viewed with a right eye. The schematic diagram which looked at the arrangement | sequence state of the 1st permeation | transmission part and 2nd permeation | transmission part of a step barrier with which the image display apparatus which concerns on 5th Embodiment of this invention is equipped planarly. The schematic diagram which looked at the arrangement | sequence state of the 1st permeation | transmission part and 2nd permeation | transmission part of a step barrier with which the image display apparatus which concerns on 6th Embodiment of this invention is equipped planarly. The schematic diagram which looked at the array state of the 1st permeation | transmission part and 2nd permeation | transmission part of a step barrier with which the image display apparatus which concerns on 7th Embodiment of this invention is equipped planarly.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described based on the drawings.
[Configuration of image display device]
FIG. 1 is a cross-sectional view schematically showing a configuration of an image display apparatus 1 according to the present embodiment. Specifically, FIG. 1 is a cross-sectional view of the liquid crystal panel 3 and the step barrier 4A as viewed from the column direction (vertical direction: vertical direction in FIGS. 3 and 4).
The image display device 1 is a directional display type image display device that displays an image according to input image information and a command, and the formed first image and second image are respectively displayed in a first viewing direction and a first viewing direction. The images are emitted in two viewing directions and displayed. Specifically, the image display device 1 according to the present embodiment generates an image including an image (right-eye image) visually recognized by the observer's right eye and an image (left-eye image) visually recognized by the left eye, By making these right-eye image and left-eye image enter the right eye and the left eye, respectively, a stereoscopic image that can be stereoscopically viewed by parallax is displayed. In the present embodiment, the image display device 1 is configured as a binocular stereoscopic display device having two viewpoints.
As shown in FIG. 1, the image display device 1 includes a backlight 2 as a light source device, a liquid crystal panel 3 as display means, and a step barrier 4A as a parallax barrier.

[Configuration of backlight]
The backlight 2 includes a cold cathode tube bent in a substantially W shape and a reflector provided on the back side of the cold cathode tube, and reflects the discharge light generated by applying a voltage to the cold cathode tube with the reflector. Then, the light is emitted to the liquid crystal panel 3 side. The backlight 2 is not limited to such a configuration, but instead of a combination of an L-shaped or U-shaped edge-type cold cathode tube and a light guide plate, a cold cathode tube and a reflector, a plurality of LEDs ( A plurality of solid light sources such as light emitting diodes may be provided.

[Configuration of LCD panel]
FIG. 2 is a schematic view of the arrangement state of the sub-pixels 3R, 3G, and 3B constituting the pixels 31 and 32 of the liquid crystal panel 3 when viewed in a plane. In FIG. 1 and FIG. 2, for convenience of explanation, a letter “R” is attached in the pixel 31 and a letter “L” is attached in the pixel 32. Further, in FIG. 2, R (red), G (green), and B (blue) sub-pixels constituting the respective pixels 31 and 32 are respectively represented by “(R)”, “ (G) ”and“ (B) ”are attached. Further, in FIG. 2, for simplification of explanation, a part of the region in the liquid crystal panel 3 is shown, but the number of rows and columns is not limited to the illustrated number.
The liquid crystal panel 3 is a fixed pixel type image forming device, and constitutes the display means of the present invention together with the backlight 2. As shown in FIG. 2, the liquid crystal panel 3 includes a plurality of first pixels 31 that display a first image that is an image for the right eye and a plurality of second pixels 32 that display a second image that is an image for the left eye. . In other words, the liquid crystal panel 3 includes a plurality of first pixels 31 that are pixels for the right eye and second pixels 32 that are pixels for the left eye. The first pixel 31 and the second pixel 32 are partitioned by a black matrix BM.

More specifically, the liquid crystal panel 3 includes a plurality of sub-pixels 3R, 3G, and 3B in which R (red), G (green), and B (blue) color filters are disposed on the light beam emission side.
Each of the subpixels 3R, 3G, and 3B includes a TFT (Thin Filmed Transistor) that applies a voltage to a liquid crystal sealed and sealed between a pair of transparent substrates as a switching element, and each subpixel 3R is switched by switching the TFT. , 3G, 3B change the voltage applied as an image signal to change the alignment state of the liquid crystal, whereby the incident light beam is modulated according to the image signal.

  Such sub-pixels 3R, 3G, and 3B are arranged so as to be adjacent to each other along the row direction in this order, and sub-pixels of the same color are arranged along the column direction. That is, a plurality of subpixels 3R are arranged along the column direction, and the same number of subpixels 3G are arranged along the column direction next to the row direction of the subpixel 3R (right side in FIG. 2). Further, the same number of subpixels 3B are arranged along the column direction next to the subpixel 3G in the row direction (right side in FIG. 2), and another subpixel 3B is arranged next to the subpixel 3B in the row direction (right side in FIG. 2). The same number of pixels 3R are arranged along the column direction. As described above, the subpixels 3R, 3G, and 3B are repeatedly arranged in this order in each row.

The sub-pixels 3R, 3G, and 3B are alternately arranged along the row direction and the column direction, and the first sub-pixels 3R1, 3G1, and 3B1 that constitute the first pixel 31 and the second sub-pixel that constitutes the second pixel 32. Set to 3R2, 3G2, and 3B2.
Specifically, when attention is paid only to each column of the subpixel 3R, the first subpixel 3R1 and the second subpixel 3R2 are alternately set in the odd column, and the second subpixel 3R2 and the first subpixel 3R2 are set in the even column. The subpixels 3R1 are alternately set.
Similarly, when attention is paid only to each column of the subpixel 3B, the first subpixel 3B1 and the second subpixel 3B2 are alternately set in the odd column, and the second subpixel 3B2 and the first subpixel are set in the even column. Pixels 3B1 are alternately set.

On the other hand, when attention is paid only to each column of the subpixel 3G, the second subpixel 3G2 and the first subpixel 3G1 are alternately set in the odd column, and the first subpixel 3G1 and the second subpixel are alternately set in the even column. 3G2 is set alternately.
Therefore, in one row, the sub-pixels are arranged in the order of 3R1, 3G2, 3B1, 3R2, 3G1, 3B2, 3R1,..., And in a row, 3R2, 3G1, 3B2, 3R1, 3G2, 3B1, 3R2, Arranged in order of….

Among these subpixels 3R, 3G, and 3B, as indicated by solid lines in FIG. 2, first subpixels 3R1, 3G1, and 3B1 that are arranged adjacent to each other in the oblique direction constitute first pixels 31 respectively. . In addition, as indicated by a dotted line in FIG. 2, the second pixel 32 is configured by the second subpixels 3R2, 3G2, and 3B2 arranged adjacent to each other in the oblique direction.
As the entire liquid crystal panel 3, the first pixels 31 and the second pixels 32 are alternately arranged in the row direction (left-right direction in FIG. 2) and the column direction (up-down direction in FIG. 2).

[Configuration of step barrier]
As shown in FIG. 1, the step barrier 4 </ b> A is disposed on the light beam emission side (observer side) of the liquid crystal panel 3, and among the displayed images, the first image (right eye image) and the second image (left eye). Image) and each image is individually incident on both eyes of the observer. Specifically, the step barrier 4 </ b> A transmits light emitted in the direction toward the right eye of the observer (first viewing direction) out of the incident first image light, and the incident second image. The light emitted in the direction toward the left eye of the observer (second viewing direction) is transmitted.
The step barrier 4A includes a translucent substrate 41 as a barrier substrate that transmits light through the liquid crystal panel 3 and a light shielding unit.

FIG. 3 is a schematic view in which the arrangement state of the first transmission part 43 and the second transmission part 44A of the step barrier 4A is viewed in a plane, and FIG. 4 shows the subpixels 3R, 3G, 3B and the first transmission. It is a schematic diagram which shows the positional relationship with the part 43 and the 2nd permeation | transmission part 44A. 5 is a schematic diagram showing the positional relationship between the sub-pixels 3R, 3G, and 3B and the transmission parts 43 and 44A when the image display device 1 in the state shown in FIG. 4 is viewed with the right eye of the observer. is there. 4 and 5, the subpixels 3R, 3G, and 3B are indicated by hatches whose intervals are gradually increased. In addition, the first subpixels 3R1, 3G1, and 3B1 are indicated by a right-upward hatch, and the second subpixels 3R2, 3G2, and 3B2 are indicated by a right-downward hatch. The same applies to the subsequent drawings.
The light shielding portion 42 is formed by laminating a light shielding material on the light transmitting substrate 41. As shown in FIGS. 3 to 5, a plurality of first transmission parts 43 and a plurality of second transmission parts 44 </ b> A are formed in the light shielding part 42.

  Each first transmission portion 43 is a substantially square opening that transmits light incident through the liquid crystal panel 3. The dimension in the row direction (the left-right direction in FIGS. 3 to 5) of each of the first transmission parts 43 is slightly larger than the dimension in the row direction of each of the sub-pixels 3R, 3G, and 3B. Further, the dimension of each first transmission portion 43 in the column direction (vertical direction in FIGS. 3 to 5) is slightly smaller than the dimension of each subpixel 3R, 3G, 3B in the column direction. The first transmission unit 43 includes the first subpixels 3R1, 3G1, and 3B1 and the second subpixels 3R2, 3G2, and 3B2 adjacent to the first subpixels in the row direction. It is formed across subpixels. At this time, the center of each first transmission part 43 is set so as to be positioned approximately at the center between the first sub-pixel and the second sub-pixel exposed by the first transmission part 43, and FIG. 5 is set so that the first pixel 31 is located on the left side in FIG.

  For example, as illustrated in FIG. 4, the first transmission portion 43 is formed across the first subpixel 3R1 and the second subpixel 3G2 adjacent to the first subpixel 3R1 in the row direction. . Similarly, the other first transmission part 43 is formed across the first subpixel 3G1 and the second subpixel 3B2, and the other first transmission part 43 includes the first subpixel 3B1 and the second subpixel 3B2. It is formed across the subpixel 3R2.

  For this reason, when observing an image displayed on the image display device 1, as shown in FIG. 5, the first sub-pixels 3 R 1, 3 G 1, and 3 B 1 are configured via the first transmission parts 43. The first pixel 31 is visually recognized by the right eye and is not shown, but the second pixel 32 configured by the second sub-pixels 3R2, 3G2, and 3B2 is visually recognized by the left eye via the first transmission parts 43. The Thus, the first image (right eye image) is visually recognized by the right eye, and the second image (left eye image) is visually recognized by the left eye.

  Similarly to the first transmission unit 43, the second transmission unit 44 </ b> A is an opening that is formed in the light shielding unit 42 and transmits light incident from the liquid crystal panel 3. In addition to the first transmission unit 43, these second transmission units 44 </ b> A transmit part of the light of the first image and the second image that is shielded by the light shielding unit 42, so that the light shielding region by the light shielding unit 42 is transmitted. Reduction and reduction of the pitch of the light shielding region are performed, and the difference between the luminance of the pixels 31 and 32 visually recognized through the first transmission unit 43 and the luminance of the region shielded by the light shielding unit 42 is reduced. And has a function of suppressing the generation of moire.

As shown in FIG. 3, the second transmission part 44A has two second transmission parts adjacent to each other in a direction (diagonal direction) intersecting the row direction and the column direction, which are the arrangement directions of the second transmission part 44A. It is located between the 1 transmission part 43, extends along the diagonal direction, and connects the two 1st transmission parts 43. In the present embodiment, three first transmission parts 43 that are arranged according to the first pixel 31 and the second pixel 32 and are adjacent in the oblique direction are connected by two second transmission parts 44A.
The opening areas of these second transmission parts 44 </ b> A are set to be smaller than the opening area of one first transmission part 43. For this reason, the amount of light (transmitted light amount) transmitted through one second transmitting portion 44 </ b> A is less than the transmitted light amount of one first transmitting portion 43.
By such a second transmission part 44A, the light in the region that should originally be shielded by the light shielding part 42 is emitted to the outside (observer side).

[Step barrier displacement]
When the image display device 1 is manufactured, as described above, each first transmission with respect to the first pixel 31 and the second pixel 32 (specifically, each subpixel 3R, 3G, 3B) of the liquid crystal panel 3 is performed. It is necessary to align the step barrier 4A so that the portion 43 is positioned at an appropriate position. However, the step barrier 4 </ b> A may be attached with a deviation from an appropriate position in the liquid crystal panel 3 due to a mechanical error of the manufacturing apparatus. In such a case, the light that should be incident on the observer's right eye or left eye through the first transmission part 43 is blocked by the light shielding part 42, so that the luminance of the visually recognized image decreases. On the other hand, in the step barrier 4A, the light is transmitted through the step barrier 4A via the second transmissive portion 44A by the second transmissive portion 44A continuous to the first transmissive portion 43, thereby reducing the luminance of the image. Can be reduced.

6 shows the first transmissive part 43 and the second transmissive part 44A and the sub-pixels 3R, 3G, and the sub-pixels 3R, 3G, when the image display device 1 is observed with the right eye when the step barrier 4A is shifted upward in FIG. It is a schematic diagram which shows the positional relationship with 3B.
For example, when the step barrier 4A is attached so as to be shifted upward in FIG. 5, as shown in FIG. 6, the light emitted from the region below each of the subpixels 3R, 3G, 3B is transmitted to the second transmission portion 44A. When the is not formed, the light is blocked by the light blocking portion 42. For this reason, when the 2nd transmission part 44A is not formed, the brightness | luminance of each pixel 31 and 32 visually recognized by the position shift of the said step barrier 4A falls.

  On the other hand, the light emitted from the area below the two subpixels located above among the subpixels 3R, 3G, and 3B corresponding to the three first transmission parts 43 connected by the second transmission part 44A. Is transmitted through the second transmitting portion 44A located on the side opposite to the direction in which the step barrier 4A is displaced (downward in FIG. 5) and emitted to the viewer side. As a result, the ratio of the luminance reduction of the pixels 31 and 32 observed through the three first transmission parts 43 and the two second transmission parts 44A is reduced, and consequently the luminance reduction of the right-eye image and the left-eye image. Is reduced.

7 shows the first transmissive part 43 and the second transmissive part 44A and the sub-pixels 3R, 3G, and the sub-pixels 3R, 3G, when the image display device 1 is observed with the right eye when the step barrier 4A is shifted to the left in FIG. It is a schematic diagram which shows the positional relationship with 3B.
On the other hand, for example, when the step barrier 4A is attached to the left side in FIG. 5, as shown in FIG. 7, in one subpixel, the direction opposite to the direction in which the step barrier 4A is displaced (see FIG. Most of the light emitted from the region on the right side in FIG. 5 does not pass through the first transmission part 43 and is shielded by the light shielding part 42. For this reason, when the 2nd transmission part 44A is not formed, the brightness | luminance of each pixel 31 and 32 visually recognized by the position shift of the said step barrier 4A falls.

  On the other hand, the light emitted from the sub-pixel region corresponding to the second transmission part 44A is transmitted through the second transmission part 44A and emitted to the viewer side. Thereby, compared with the case where the step barrier in which the 2nd transmissive part 44A is not formed is used, the rate of the luminance fall of each pixel 31 and 32 is reduced, and the rate of the luminance fall of the image for right eyes and the image for left eyes by extension by extension. Is reduced.

The image display device 1 according to the present embodiment described above has the following effects.
A part of the light of the first image and the second image that is blocked by the light blocking unit 42 is transmitted through the second transmitting unit 44A. According to this, as compared with the case where the second transmission part 44A is not provided, the area shielded by the light shielding part 42 can be reduced, and the pitch of the area can be reduced. For this reason, the difference between the luminance of the pixels 31 and 32 visually recognized through the first transmission part 43 and the luminance of the area shielded by the light shielding part 42 can be reduced, making it difficult to visually recognize moire. it can. Accordingly, it is possible to suppress deterioration in image quality of the image displayed by the image display device 1.

  Each of the second transmission parts 44A is formed between two first transmission parts 43 adjacent in the oblique direction. According to this, in the image display device 1, the number of regions where the light of the first image and the second image is observed can be increased. Therefore, it is possible to improve the fineness of the image in appearance.

  Since the second transmission part is formed continuously so as to connect two first transmission parts 43 adjacent in the oblique direction, the two first transmission parts 43 and one second transmission part 44A can be formed as one transmission part. According to this, these 1st permeation | transmission parts 43 and 2nd permeation | transmission part 44A can be formed in one process. Therefore, the step of forming the step barrier 4A can be simplified. In the present embodiment, since the two second transmission parts 44A are formed so as to connect the three first transmission parts 43 corresponding to the first pixel 31 and the second pixel 32, these second transmission parts 44A are formed. The formation process of the 1st permeation | transmission part 43 and the 2nd permeation | transmission part 44 and by extension, step barrier 4A can be simplified further.

  Even when the step barrier 4A is combined with being shifted along at least one of the row direction and the column direction with respect to the liquid crystal panel 3, the step barrier 4A is positioned on the side opposite to the shift direction from the appropriate position of the step barrier 4A. The light of the first image and the second image that should be shielded is transmitted through the second transmitting portion 44A. According to this, compared with the step barrier 4A in which the second transmissive portion 44A is not formed, the ratio of the light to be shielded among the light emitted from the first pixel and the second pixel can be reduced. . Accordingly, it is possible to suppress a rapid decrease in the luminance of the display image.

  The amount of light transmitted through one second transmission portion 44A is less than the amount of light transmitted through one first transmission portion 43. According to this, it is possible to reduce the amount (crosstalk value) in which the light of the other image leaks into one of the first image and the second image. Therefore, deterioration of each image when the first image and the second image are visually recognized can be further suppressed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
The image display apparatus according to the present embodiment has the same configuration as that of the image display apparatus 1 described above, but the shape of the second transmission part formed in the step barrier is different. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 8 is a schematic view of the arrangement state of the first transmission unit 43 and the second transmission unit 44B of the step barrier 4B provided in the image display device according to the present embodiment when viewed in a plan view.
The image display apparatus according to the present embodiment has the same configuration as that of the image display apparatus 1 except that it includes a step barrier 4B instead of the step barrier 4A.
Similar to the step barrier 4A, the step barrier 4B includes a translucent substrate 41 and a light shielding portion 42 formed on the translucent substrate 41. As shown in FIG. 8, the light shielding part 42 includes a plurality of first transmission parts 43 and a plurality of second transmission parts 44B. In addition, the shape, arrangement position, etc. of each 1st permeation | transmission part 43 are the same as that of the step barrier 4A.

Each second transmission part 44B is positioned between two first transmission parts 43 adjacent in the row direction and the column direction, respectively, and is substantially L-shaped so as to connect the two first transmission parts 43 adjacent in the oblique direction. It is formed in a shape.
Specifically, each second transmission portion 44B extends from the first transmission portion 43 toward one side in the row direction (right side in FIG. 8) and extends toward one side in the column direction (lower side in FIG. 8). After that, it is connected to another first transmission part 43. In addition, the other second transmission part 44B extends from the other first transmission part 43 toward one side in the row direction, extends toward one side in the column direction, and then further another first transmission part 43. Connected to. For this reason, three first transmission parts 43 corresponding to one first pixel 31 and one second pixel 32 are connected by two second transmission parts 44B. In the present embodiment, the bending position of the second transmissive portion 44B is substantially the center of the two first transmissive portions 43 adjacent in the row direction and the approximate position of the two first transmissive portions 43 adjacent in the column direction. It is set in the center.

FIG. 9 is a schematic diagram illustrating the positional relationship between the sub-pixels 3R, 3G, and 3B and the first transmission unit 43 and the second transmission unit 44B.
As shown in FIG. 9, the step barrier 4 </ b> B is connected by two second transmission parts 44 </ b> B when viewed from the direction (observer side) in which the step barrier 4 </ b> B is attached to the liquid crystal panel 3, as with the step barrier 4 </ b> A. The three first transmission parts 43 are aligned with the liquid crystal panel 3 so as to straddle the sub-pixels 3R, 3G, and 3B constituting the first pixel 31 and the second pixel 32, respectively. At this time, the center of the first transmission part 43 is set to be located at the center between the corresponding first subpixel and second subpixel.

FIG. 10 is a schematic diagram showing the positional relationship between the sub-pixels 3R, 3G, and 3B and the transmissive portions 43 and 44B when the image display apparatus in the state shown in FIG. 9 is viewed with the right eye of the observer.
For this reason, when an image display apparatus in which the step barrier 4B is attached to the liquid crystal panel 3 is observed, as shown in FIG. 10, the three first transmission parts 43 connected by the two second transmission parts 44B are used. The light emitted from the first pixel 31 is visually recognized by the right eye. Although not shown, the light emitted from the second pixel 32 is visually recognized by the left eye through the first transmission part 43.

Here, when the image display device is viewed with the right eye, each second transmission unit 44B is located on the second sub-pixels 3R2, 3G2, and 3B2. For this reason, the light incident on the right eye via each second transmission portion 44B includes the light of the second pixel 32 in addition to the light of the first pixel 31. Similarly, when the image display device is viewed with the left eye, although not shown, each second transmission unit 44B is located on the first subpixel 3R1, 3G1, 3B1, and thus each second transmission unit 44B In addition to the light from the second pixel 32, the light from the first pixel 31 is included in the light that is incident on the left eye through the first eye 31.
The opening area of each of the second transmission parts 44B is set to be smaller than the opening area of one first transmission part 43. For this reason, the amount of light transmitted through one second transmission portion 44B is less than the amount of light transmitted through one first transmission portion 43.
According to the image display device according to the present embodiment described above, the same effects as those of the image display device 1 described above can be obtained.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.
The image display apparatus according to the present embodiment has the same configuration as that of the image display apparatus 1 described above, but the shape of the second transmission part formed in the step barrier is different. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 11 is a schematic view of the arrangement state of the first transmission unit 43 and the second transmission unit 44C of the step barrier 4C provided in the image display device according to the present embodiment as viewed in a plan view.
The image display apparatus according to the present embodiment has the same configuration as that of the image display apparatus 1 described above except that it includes a step barrier 4C instead of the step barrier 4A.
Similar to the step barrier 4A, the step barrier 4C includes a translucent substrate 41 and a light shielding portion 42 formed on the translucent substrate 41. As shown in FIG. 11, the light-shielding part 42 has a plurality of first transmission parts 43 and a plurality of second transmission parts 44C. Among these, the shape, arrangement position, and the like of each first transmission portion 43 are the same as those of the above-described step barrier 4A.

Each of the second transmission parts 44C is located between two first transmission parts 43 adjacent to each other in the row direction and the column direction, and is formed to extend along the column direction (vertical direction in FIG. 11). 1 is connected to the transmission part 43. The second transmissive portions 44C are divided into transmissive portions 44C1 and transmissive portions 44C2 that are alternately formed along the row direction.
The transmission part 44C1 is located in the first and third rows from the top in FIG. 11 among the first transmission parts 43 for three rows, and is adjacent to the two first transmission parts 43 adjacent to each other in the column direction. It extends along the column direction so as to connect the centers.
The transmissive portion 44C2 extends in the column direction from both ends of the first transmissive portion 43 located in the second row from the top in FIG. The both ends in the column direction of the transmission part 44C2 are set so that the positions in the column direction are substantially the same as the end parts of the first transmission parts 43 in the first and third rows.
The dimension in the row direction of these transmission parts 44C1 and 44C2 is set according to the dimension in the row direction between the sub-pixels 3R, 3G, and 3B. Specifically, the dimension in the row direction of the transmissive portions 44C1 and 44C2 is set to be equal to or smaller than the dimension in the row direction of the black matrix BM adjacent to each other in two adjacent subpixels along the row direction.

FIG. 12 is a schematic diagram illustrating the positional relationship between the sub-pixels 3R, 3G, and 3B and the first transmission unit 43 and the second transmission unit 44C. FIG. 13 is a schematic diagram showing the positional relationship between the sub-pixels 3R, 3G, 3B and the transmissive portions 43, 44C when the image display apparatus in the state shown in FIG. 12 is viewed with the right eye of the observer. .
As shown in FIG. 12, the step barrier 4C is attached to the liquid crystal panel 3 so that the first transmission portion 43 and the subpixels 3R, 3G, 3B have the same positional relationship as the step barrier 4A.
As a result, when the image display device is viewed with the right eye, as shown in FIG. 13, the first transmission parts 43 are positioned on the first subpixels 3R1, 3G1, and 3B1, respectively. The light of the first image emitted from 3R1, 3G1, 3B1 is observed by the right eye. Although not shown, when the image display device is viewed with the left eye, each first transmission unit 43 is positioned on each second subpixel 3R2, 3G2, 3B2, and each second subpixel 3R2, The light of the second image emitted from 3G2 and 3B2 is observed by the left eye.

Here, when the image display device is viewed with the right eye, each of the second transmission parts 44C (44C1, 44C2) is located on the second subpixels 3R2, 3G2, 3B2. For this reason, the light observed by the right eye includes a part of the light of the second subpixels 3R2, 3G2, and 3B2 in addition to the light of the first subpixels 3R1, 3G1, and 3B1.
Similarly, when the image display device is viewed with the left eye, although not shown, the respective second transmission parts 44C (44C1, 44C2) are located on the sub-pixels 3R1, 3G1, 3B1. For this reason, the light observed by the left eye includes part of the light from the first subpixels 3R1, 3G1, and 3B1 in addition to the light from the second subpixels 3R2, 3G2, and 3B2.

In this way, it is possible to reduce the luminance difference between the first image (right eye image) and the second image (left eye image) that are visually recognized. In addition, since the opening area of each transmission part 44C1 and 44C2 is set so that it may become smaller than the opening area of one 1st transmission part 43, the transmitted light amount of one transmission part 44C1 and 44C2 is one 1st transmission part. Less than the amount of light transmitted through one transmission part 43.
According to the image display device according to the present embodiment described above, the same effects as those of the image display device 1 described above can be obtained.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described.
The image display apparatus according to the present embodiment has the same configuration as that of the image display apparatus 1 described above, but the shape of the second transmission part formed in the step barrier is different. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 14 is a schematic view of the arrangement state of the first transmission unit 43 and the second transmission unit 44D of the step barrier 4D provided in the image display device according to the present embodiment when viewed in a plan view.
The image display device according to the present embodiment has the same configuration as the image display device 1 described above except that it includes a step barrier 4D instead of the step barrier 4A.
Similar to the step barrier 4A, the step barrier 4D includes a translucent substrate 41 and a light shielding portion 42 formed on the translucent substrate 41. As shown in FIG. 14, the light shielding part 42 includes a plurality of first transmission parts 43 and a plurality of second transmission parts 44D. Among these, the shape, arrangement position, and the like of each first transmission portion 43 are the same as those of the above-described step barrier 4A.

The second transmission portion 44D is formed in a lattice shape along the column direction and the row direction.
Specifically, the plurality of second transmission parts 44D extending along the column direction are formed so as to connect the plurality of first transmission parts 43 adjacent to each other in the column direction. At this time, each second transmission part 44 </ b> D is formed so as to pass through the center of each first transmission part 43.
Further, the plurality of second transmission parts 44D extending along the row direction are formed so as to connect the plurality of first transmission parts 43 adjacent to each other in the row direction. At this time, each second transmission part 44 </ b> D is formed so as to pass through the center of each first transmission part 43.
For this reason, almost all the first transmission parts 43 formed in the light shielding part 42 are connected along the row direction and the column direction by the second transmission parts 44D formed between the first transmission parts 43. The

FIG. 15 is a schematic diagram illustrating a positional relationship between the sub-pixels 3R, 3G, and 3B and the first transmission unit 43 and the second transmission unit 44D. FIG. 16 is a schematic diagram showing the positional relationship between the sub-pixels 3R, 3G, and 3B and the transmissive portions 43 and 44D when the image display device in the state shown in FIG. 15 is viewed with the right eye of the observer. .
As shown in FIG. 15, the step barrier 4D is attached to the liquid crystal panel 3 so that the first transmission portion 43 and the subpixels 3R, 3G, and 3B have the same positional relationship as the step barrier 4A. As a result, as shown in FIG. 16, the light forming the first image emitted from each of the first sub-pixels 3R1, 3G1, and 3B1 constituting the first pixel 31 via the respective first transmission parts 43. Observed by the right eye. Similarly, although not shown, the light forming the second image emitted from each of the second sub-pixels 3R2, 3G2, and 3B2 constituting the second pixel 32 through the respective first transmission parts 43. Is observed by the left eye.

Here, when the image display device is viewed with the right eye, each second transmission unit 44D is located on the second sub-pixels 3R2, 3G2, and 3B2. For this reason, the light observed by the right eye includes a part of the light of the second subpixels 3R2, 3G2, and 3B2 in addition to the light of the first subpixels 3R1, 3G1, and 3B1.
Similarly, when the image display device is viewed with the left eye, although not shown in the drawing, the respective second transmission portions 44D are located on the sub-pixels 3R1, 3G1, and 3B1. For this reason, the light observed by the left eye includes part of the light from the first subpixels 3R1, 3G1, and 3B1 in addition to the light from the second subpixels 3R2, 3G2, and 3B2.

For this reason, the brightness | luminance difference of the 1st image (image for right eyes) visually recognized and the 2nd image (image for left eyes) can be reduced. In addition, since the opening area of each 2nd transmission part 44D is set so that it may become smaller than the opening area of one 1st transmission part 43, the transmitted light amount of one 2nd transmission part 44D is one 1st transmission part. Less than the amount of light transmitted through one transmission part 43.
According to the image display device according to the present embodiment described above, the same effects as those of the image display device 1 described above can be obtained.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described.
The image display device according to the present embodiment has the same configuration as that of the above-described image display device 1, but the shape and configuration of the second transmission part formed in the step barrier are different. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 17 is a schematic diagram showing a step barrier 4E provided in the image display apparatus according to the present embodiment.
The image display device of the present embodiment has the same configuration as that of the image display device 1 described above except that it includes a step barrier 4E instead of the step barrier 4A.
Similar to the step barrier 4A, the step barrier 4E includes a translucent substrate 41 and a light shielding portion 42 formed on the translucent substrate 41. Further, as shown in FIG. 17, the light shielding part 42 includes a plurality of first transmission parts 43 and a plurality of second transmission parts 44E. In addition, the shape, arrangement position, etc. of each 1st permeation | transmission part 43 are the same as that of the above-mentioned step barrier 4A.

Each of the second transmission parts 44E is formed in a substantially cross shape at the center between the plurality of first transmission parts 43 adjacent in the row direction and the column direction. These second transmission parts 44E may be the same opening (substantially total transmission opening) as the first transmission part 43. However, in this embodiment, the second transmission part 44E is a semi-transmission part having a lower light transmittance than the first transmission part 43. Is formed.
Specifically, each second transmission portion 44E can be configured by forming a layer with reduced light transmittance on the light-transmitting substrate 41, and also reduces the number of layers (film thickness) of the material forming the light-shielding portion 42. Can also be configured. Alternatively, the second transmissive portion 44E can be configured by halftone exposure of the region where the second transmissive portion 44E is formed.

Such a step barrier 4E is attached to the liquid crystal panel 3 so that the first transmission part 43 and the sub-pixels 3R, 3G, 3B have the same positional relationship as the step barrier 4A.
Accordingly, the first transmission unit 43 is positioned in the direction from the first pixel 31 toward the right eye (first viewing direction), and the first transmission unit in the direction from the second pixel 32 toward the left eye (second viewing direction). 43 is located. Therefore, the first image and the second image displayed by each first pixel 31 and each second pixel 32 are observed by the observer's right eye and left eye, respectively.

At this time, the second transmission part 44E is located on the second sub-pixels 3R2, 3G2, and 3B2 when viewed with the right eye, as with the second transmission parts 44A to 44D described above, and is also viewed with the left eye. In some cases, it is located on the first subpixel 3R1, 3G1, 3B1. For this reason, the light observed by the right eye includes part of the light of the second pixel 32 in addition to the light of the first pixel 31. Similarly, the light observed by the left eye includes a part of the light of the first pixel 31 in addition to the light of the second pixel 32. For this reason, the brightness | luminance difference of the 1st image (image for right eyes) visually recognized and the 2nd image (image for left eyes) can be reduced. At this time, the area of the second transmission part 44E is smaller than the opening area of the first transmission part 43, and the second transmission part 44E is configured to reduce the transmittance. The amount of transmitted light is less than the amount of transmitted light of one first transmission part 43. For this reason, it is possible to prevent the aforementioned crosstalk value from becoming unnecessarily large.
According to the image display device according to the present embodiment described above, the same effects as those of the image display device 1 described above can be obtained.

[Sixth Embodiment]
Next, a sixth embodiment of the present invention will be described.
The image display device according to the present embodiment has the same configuration as that of the above-described image display device 1, but the shape and configuration of the second transmission part formed in the step barrier are different. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 18 is a schematic diagram illustrating a step barrier 4F included in the image display device according to the present embodiment.
The image display apparatus according to the present embodiment has the same configuration as that of the image display apparatus 1 described above except that it includes a step barrier 4F instead of the step barrier 4A.
Similar to the step barrier 4A, the step barrier 4F includes a light-transmitting substrate 41 and a light shielding unit 42. Further, as shown in FIG. 18, the light shielding part 42 includes a plurality of first transmission parts 43 and a plurality of second transmission parts 44F. In addition, the shape, arrangement position, etc. of each 1st permeation | transmission part 43 are the same as that of the above-mentioned step barrier 4A.

  Each second transmission portion 44F is an opening formed in the center between the plurality of first transmission portions 43 adjacent in the row direction and the column direction so as to extend along the column direction. The dimension in the column direction of the second transmissive portion 44F is set so as to substantially match the dimension in the column direction of the subpixels 3R, 3G, and 3B. It is set smaller than the dimension of.

Specifically, the dimension in the row direction of each of the subpixels 3R, 3G, and 3B is 178 μm, and when the black matrix BM is included, the dimension in the row direction is 204 μm. On the other hand, the dimension in the column direction of each second transmission portion 44F is set to 180 μm.
In addition, the dimension in the column direction of each of the subpixels 3R, 3G, and 3B is 46 μm. When the black matrix BM is included, the dimension in the column direction is 68 μm. On the other hand, the dimension in the row direction of each second transmission portion 44F is set to 20 μm.

Such a step barrier 4F is attached to the liquid crystal panel 3 so that the first transmission part 43 and the sub-pixels 3R, 3G, 3B have the same positional relationship as the step barrier 4A. Thereby, since the 1st transmission part 43 is located on the optical path of the light radiate | emitted from the 1st pixel 31 and the 2nd pixel 32 in the 1st viewing direction and the 2nd viewing direction, respectively, a 1st image and a 2nd image are Observed by the right and left eyes, respectively.
Each second transmission portion 44F is positioned on the second subpixels 3R2, 3G2, and 3B2 when viewed with the right eye, and is positioned on the first subpixels 3R1, 3G1, and 3B1 when viewed with the left eye. To do. Then, the light incident from the liquid crystal panel 3 on each of the second transmission portions 44F is diffused and emitted by diffraction, as indicated by a one-dot chain line in FIG. Therefore, a part of the light of the second pixel 32 in addition to the light of the first pixel 31 is observed by the right eye, and a part of the light of the first pixel 31 in addition to the light of the second pixel 32 is observed by the left eye. Is observed.
Since the opening area of each second transmitting portion 44F is smaller than the opening area of one first transmitting portion 43, the amount of transmitted light of one second transmitting portion 44F is the amount of transmitted light of one first transmitting portion 43. Fewer.

Here, the dimension of the second transmission part 44F is not limited to the above-mentioned dimension, and it is sufficient that the light incident on the second transmission part 44F is set to a dimension that is diffused and emitted by diffraction. However, as the dimension in the row direction becomes smaller than 20 μm, the diffraction angle of transmitted light increases with wavelength, but the intensity per unit area of transmitted light decreases. On the other hand, as the dimension in the row direction becomes larger than 20 μm, the diffraction angle decreases according to the wavelength, but the intensity per unit area of transmitted light is constant. Therefore, by setting the dimension in the row direction of the second transmission portion 44F to approximately 20 μm, it is possible to ensure the necessary transmitted light intensity and diffraction angle.
According to the image display device of the present embodiment described above, the same effect as that of the image display device 1 described above can be obtained, and the second transmission portion 44F is small, so that the above-described crosstalk value is reduced. It is possible to suppress image quality deterioration of the display image due to moire or the like.

[Seventh Embodiment]
Next, a seventh embodiment of the present invention will be described.
The image display apparatus according to the present embodiment has the same configuration as that of the image display apparatus described in the fifth embodiment. However, in the step barrier 4F shown in the fifth embodiment, the second transmission portion 44F extends along the row direction, whereas in the step barrier of the image display device according to the present embodiment, the second transmission portion 44F extends. The extending direction of the part is the column direction. In this respect, the image display device according to the present embodiment is different from the image display device shown in the fifth embodiment. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 19 is a schematic diagram showing a step barrier 4G included in the image display apparatus according to the present embodiment.
The image display device according to the present embodiment has the same configuration as that of the image display device described in the fifth embodiment, except that a step barrier 4G is provided instead of the step barrier 4F. Further, the step barrier 4G has the same configuration as the step barrier 4F except that the second barrier 44G is provided instead of the second transmitter 44F.
Among these, each 2nd permeation | transmission part 44G is an opening formed in the center between the some 1st permeation | transmission parts 43 adjacent to a row direction and a column direction so that it may extend along a row direction. The dimension in the row direction of each of the second transmissive portions 44G is formed in accordance with the dimension in the row direction of the subpixels 3R, 3G, and 3B. On the other hand, the dimension of each second transmission part 44G in the column direction is set to a value similar to the dimension of the second transmission part 44F in the row direction, that is, 20 μm in the present embodiment. Thereby, the intensity | strength and diffraction angle of required transmitted light are securable.
Since the opening area of each second transmission part 44G is smaller than the opening area of one first transmission part 43, the transmission light quantity of one second transmission part 44G is the transmission light quantity of one first transmission part 43. Fewer.

Such a step barrier 4G is attached to the liquid crystal panel 3 so that the first transmission part 43 and the sub-pixels 3R, 3G, 3B have the same positional relationship as the step barrier 4A. Thereby, since the 1st transmission part 43 is located on the optical path of the light radiate | emitted from the 1st pixel 31 and the 2nd pixel 32 in the 1st viewing direction and the 2nd viewing direction, respectively, a 1st image and a 2nd image are Are observed by the right eye and the left eye, respectively.
Further, the light incident on each second transmission portion 44G from the liquid crystal panel 3 is diffused and emitted by diffraction, as shown by a one-dot chain line in FIG. Therefore, a part of the light of the second pixel 32 is observed together with the light of the first pixel 31 by the right eye, and a part of the light of the first pixel 31 is observed together with the light of the second pixel 32 by the left eye. Observed.
The dimensions in the row direction and the column direction of the second transmission part 44G can be set as appropriate based on the required intensity and diffraction angle of transmitted light.
According to the image display device according to the present embodiment described above, the same effects as those of the image display device described in the fifth embodiment can be obtained.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In each said embodiment, although step barrier 4A-4G was mentioned as a parallax barrier, this invention is not limited to this. That is, the first transmission portion extends in the row direction or the column direction according to a liquid crystal panel having a stripe-type pixel arrangement in which the first pixels 31 and the second pixels 32 are alternately arranged in the row direction or the column direction. You may employ | adopt the stripe barrier formed so that it might come out. Even in such a stripe barrier, it is sufficient that the second transmission part is formed in the light shielding part as described above.

In the first to fourth embodiments, the second transmission parts 44A to 44D are formed so as to connect the plurality of first transmission parts 43, but the present invention is not limited to this. That is, like the 2nd permeation | transmission part 44E-44G shown in the said 5th-7th embodiment, you may form independently of the 1st permeation | transmission part 43. FIG.
In addition, each of the two second transmissive portions 44A and 44B is connected to one pixel by connecting three first transmissive portions 43 formed according to the sub-pixels 3R, 3G, and 3B that form one pixel. Accordingly, the opening is formed in the light shielding portion 42, but the present invention is not limited to this. That is, like the transmission part 44C1 constituting the second transmission part 44C, a plurality of first transmission parts provided according to the subpixels 3R, 3G, and 3B may be connected by the second transmission part. . In this case, the extending direction of the second transmission part may be any of a row direction, a column direction, and an oblique direction intersecting these.

  In the fifth embodiment, each second transmission portion 44E is formed in a substantially cross shape, but the present invention is not limited to this. That is, the shape of the second transmission part 44E may be a substantially rectangular shape or a substantially circular shape, and can be set as appropriate. In addition, the configuration for reducing the light transmittance of the second transmission portion 44E can be set as appropriate, and further, the configuration for reducing the light transmittance may be omitted.

  In the sixth and seventh embodiments, the second transmission parts 44F and 44G extend in the column direction and the row direction, respectively, but the present invention is not limited to this. That is, if the incident light can be diffused and transmitted by diffraction, the shapes of the second transmission parts 44F and 44G can be set as appropriate. For example, like the second transmission part 44E, the second transmission part may be formed in a substantially cross shape, or may be formed so as to connect a plurality of first transmission parts 43 adjacent in the row direction and the column direction. Good. The extending direction of the second transmission part at this time may be any of a column direction, a row direction, and a direction (oblique direction) intersecting these directions. Furthermore, the dimensions of the second transmission parts 44E to 44G can be appropriately set as described above.

  In the sixth and seventh embodiments, each of the second transmission portions 44F and 44G is configured as an opening that diffuses and transmits incident light by diffraction, but the present invention is not limited to this. That is, any other configuration may be used as long as it is a configuration in which incident light is diffused (scattered) and transmitted. For example, a scattering layer may be formed in the second transmission part.

  In each of the embodiments, the backlight 2 and the liquid crystal panel 3 as display means form a first image that is an image for the right eye and a second image that is an image for the left eye, and the step barriers 4A to 4G The first image and the second image are separated so as to be incident on the right eye and the left eye of the observer, respectively, but the present invention is not limited to this. In other words, the parallax barrier can separate the first image and the second image by emitting the first image in the first viewing direction and emitting the second image in a second viewing direction different from the first viewing direction. Any configuration may be used. For example, the parallax barrier is configured so that the first viewer who is positioned in the first viewing direction can view the first image and the second viewer who is positioned in the second viewing direction can view the second image. Also good.

  In each of the embodiments, the configuration in which the backlight 2 and the liquid crystal panel 3 are combined is described as the display unit, but the present invention is not limited to this. For example, other displays such as organic EL (Electro-Luminescence), plasma, and CRT (Cathode Ray Tube) can be cited as other configurations of the display means.

  INDUSTRIAL APPLICABILITY The present invention can be used for a directional display type image display device, and for example, can be suitably used for a stereoscopic image display device that displays a right-eye image and a left-eye image and displays an image that can be stereoscopically viewed by parallax. Can do.

  DESCRIPTION OF SYMBOLS 1 ... Image display apparatus, 2 ... Backlight (display means), 3 ... Liquid crystal panel (display means), 4A-4G ... Step barrier (parallax barrier), 31 ... 1st pixel, 32 ... 2nd pixel, 42 ... Light shielding Part, 43 ... 1st transmission part, 44A-44G ... 2nd transmission part.

Claims (9)

A parallax barrier that separates a first image displayed by the first pixel and a second image displayed by the second pixel in combination with a display means in which a plurality of first pixels and second pixels are arranged. And
The second pixel is arranged according to the first pixel and the second pixel, and is emitted from the first pixel along the first viewing direction, and the second pixel is different from the first viewing direction. A plurality of first transmission parts that transmit light emitted along the viewing direction;
A light shielding unit that blocks light emitted from the first pixel in a direction different from the first viewing direction and light emitted from the second pixel in a direction different from the second viewing direction;
A plurality of second transmission parts that are formed in the light shielding part and transmit at least part of the light incident from the display means;
A parallax barrier characterized by comprising: The parallax barrier according to claim 1,
The parallax barrier, wherein the second transmission part is formed between the plurality of first transmission parts. The parallax barrier according to claim 2,
The parallax barrier, wherein the second transmission part connects a plurality of adjacent first transmission parts. In the parallax barrier according to claim 2 or 3,
The parallax barrier, wherein the second transmission part extends along a row direction. The parallax barrier according to any one of claims 2 to 4,
The parallax barrier, wherein the second transmission part extends along a column direction. In the parallax barrier according to claim 2 or 3,
The parallax barrier, wherein the second transmission part extends along a direction intersecting each of a row direction and a column direction. The parallax barrier according to any one of claims 1 to 6,
The parallax barrier characterized in that the amount of light transmitted through the second transmission part is less than the amount of light transmitted through the first transmission part. The parallax barrier according to any one of claims 1 to 7,
The parallax barrier, wherein the second transmission unit diffracts and transmits light incident from the display unit. Display means in which a plurality of first pixels for displaying the first image and a plurality of second pixels for displaying the second image are arranged;
The parallax barrier according to any one of claims 1 to 8, wherein the parallax barrier is used in combination with the display unit and separates the first image and the second image;
An image display device comprising:

Images