JP2016048808A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device capable of solving a problem that when image light is emitted from a light emission point at which a light source portion is located while the image light is converged by a lens corresponding to the light emission point, a light shielding wall is provided to prevent entrance of light from light emission points other than the above combination into the lens, so that the shadow of the light shielding wall is reflected in an image to be viewed.SOLUTION: An image display device has a light source unit in which plural combinations of first light emission points for a first image and second light emission points for a second image arranged substantially planarly, a lens unit in which lens corresponding to the combinations of the first light emission points and the second emission points are arranged substantially planarly, a light shielding unit which is located between the light source unit and the lens unit, and makes only image light irradiated from the first light emission points and the second light emission points of the combination is incident to the lens of the lens unit which corresponds to the combination, a first diffusion unit for diffusing and emitting image light from the lens unit in a predetermined direction, a second diffusion unit for further diffusing and emitting the image light in a predetermined direction, and a modulation panel for modulating the image light.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image display apparatus that displays a plurality of images substantially simultaneously with one image.

  One of the methods for viewing a stereoscopic image or a stereoscopic video on a video display device is that the video display device has a parallax according to the contents of the stereoscopic image and the stereoscopic video respectively to the right eye and the left eye to the viewer. There is a method for displaying different images. This method further includes a method in which the viewer views only the right-eye image on the right eye and only the left-eye image on the left eye (glasses viewing method) using glasses or the like, and the viewer wears glasses or the like. There is a method of displaying the left eye image only on the left eye and the right eye image only on the right eye (naked eye viewing method) on the video display device side without using. In the description of the present application, a video display device using a naked eye viewing method will be mainly described.

  Patent Document 1 has a light source arranged at spatially separated positions corresponding to the left and right eyes, a lens that converts a difference in the position of the light source into a light emission direction, and directivity emitted from the lens. A technique for switching a light source in synchronism with displaying a video corresponding to the left and right eyes on a liquid crystal panel is disclosed. By this. By placing the left and right eyes on the path of the backlight and looking at the liquid crystal panel, it is possible to realize an autostereoscopic display in which a stereoscopic image can be seen without using dedicated glasses. Patent Document 1 discloses a technique for preparing a plurality of light source and lens sets corresponding to the left and right eyes to ensure a sufficient backlight area for a liquid crystal panel. Thereby, an autostereoscopic display capable of reducing the depth of the autostereoscopic display device is made possible.

  Japanese Patent Application Laid-Open No. 2004-228688 controls a light source of a first video and a light source of a second video in accordance with raster scanning in a display device that displays a first video and a second video in a time division manner using a raster scanning method. The technology to do is disclosed. This makes it possible to eliminate the occurrence of crosstalk between the first video and the second video. Japanese Patent Application Laid-Open No. H10-228707 has a configuration in which a plurality of light source and lens sets are provided, and a naked-eye three-dimensional display provided with a partition that prevents light emitted from a certain light source from entering an adjacent lens other than the corresponding lens. The technology is disclosed. Thereby, it is possible to prevent an unnecessary disturbing image from appearing when viewing a stereoscopic image.

Japanese National Patent Publication No. 4-504786 JP 2005-77437 A

  However, when the partition is provided, the present inventors have found a problem that the shadow of the partition enters the video viewed by the viewer. This can be one of the deteriorations in display quality that is perceived as unevenness by the viewer who views the video.

  In view of this, an object of the present application is to provide an image display device that eliminates the deterioration in display quality caused by the shadow of the partition.

  An image display device according to the present disclosure is an image display device that displays a first image and a second image, and includes a first light emitting point that emits image light for the first image, and a second image display device. A plurality of combinations of a second light emitting point that emits the image light, a light source unit arranged in a substantially planar shape, and a plurality of lenses corresponding to a combination of the first light emitting point and the second light emitting point, a substantially flat surface. To the lens of the lens unit that is located between the first light emitting point and the second light emitting point of the combination, and that corresponds to the combination. A light shielding part having a light shielding wall to be incident, a first diffusion part that diffuses and emits image light from the lens part in a predetermined direction, and image light diffused by the first diffusion part in a predetermined direction. A second diffusing portion that is diffused and emitted, and an image of the first image and the second image And a modulation panel for modulating the image light in accordance with the Patent.

  According to the invention of the present application, it is possible to suppress a decrease in display quality of an image displayed by the image display device.

Configuration diagram of image display apparatus according to Embodiment 1 The figure which expanded the structure from the light source part of the image display apparatus in Embodiment 1 to a lens part. The figure which expanded the structure from the 1st spreading | diffusion part of the image display apparatus in Embodiment 1 to a modulation panel. The figure which shows the positional relationship etc. at the time of projecting the light emission point in Embodiment 1, and the light-shielding wall of the light-shielding part on the same plane shape The figure which shows the irradiation condition of the light from the light source in Embodiment 1 The figure which shows the propagation condition of the image light which reaches | attains the viewer in Embodiment 1

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The inventor (s) provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is intended to limit the subject matter described in the claims. Not what you want.

(Embodiment 1)
FIG. 1 is a diagram showing a configuration of an image display apparatus described in this embodiment. In order to simplify the explanation, an X axis, a Y axis, and a Z axis are provided in the drawing. The X axis is the horizontal direction of the image display device, the Y axis is the vertical (downward) direction of the image display device, and the Z axis is the direction in which video light is emitted from the image display device.

  In addition, when described as an “image” in the following embodiment, unless otherwise specified, the description includes not only a still image but also a video such as a moving image.

<Configuration of image display device>
The image display apparatus includes a light source unit 101, a light shielding unit 120, a lens unit 130, a first diffusion unit 140, a spacer 150, a second diffusion unit 160, and a modulation panel 170.

  FIG. 2 is an enlarged view of the respective components from the light source unit 101 to the lens unit 130 in the positive direction of the Z-axis. Similarly, FIG. 3 is an enlarged view of the respective components from the first diffusion unit 140 to the modulation panel 170 in the positive direction of the Z-axis.

  The light source unit 101 has a plurality of light emitting points on a predetermined plane. More specifically, as illustrated in FIG. 2, the light source unit 101 includes a plurality of light emitting points 101 a serving as the light source of the first image and light emitting points 101 b serving as the light source of the second image. It is the structure arranged in the assembly plane shape. These light emitting points 101a and 101b can be realized as LEDs or the like mounted on a predetermined plane such as an electronic substrate.

  In the example of FIG. 2, the case where two light emitting points are provided in one cell described below is shown, but the invention described in this embodiment is not limited to this. Three or more light emitting points may be provided, or even one light emitting point may be used as long as it can serve as a light source for the first image and the second image.

  In the description of the present embodiment, the pair of light emitting points 101a and 101b are arranged so as to be substantially parallel to the horizontal direction (X-axis direction) of the image display device. However, the contents described in the present application are not limited to this. For example, the light emitting points 101a and 101b may be arranged in parallel with the vertical direction (Y direction) of the image display device, or arranged obliquely with a predetermined angle.

  The “cell” includes a light emitting point of the light source unit 101, a light shielding wall of the light shielding unit 120, and a lens of the lens unit 130. Light emitted from one or a plurality of light emitting points of the light source unit 101 is incident on a lens constituting the same cell. The light shielding wall prevents light emitted from a light emitting point of a certain cell from entering a lens of a different cell. That is, the light emitted in each cell is incident only on the lens inside each cell, and the light does not enter and mix between the cells.

  The light shielding wall of the light shielding unit 120 prevents the light emitted from the light emitting points 101a and 101b from being diffused other than entering the lens 131 of the lens unit 130 of the cell corresponding to the light emitting point. In particular, light emitted from a light emitting point of a certain cell is prevented from entering a lens of another cell. As shown in FIG. 2, the light shielding unit 120 divides the space between the light source unit 101 and the lens unit 130 in units of cells. By providing the light shielding portion 120, it is possible to allow only light from a specific light emitting point to enter a certain lens. When light from other than a specific light emitting point is incident on a certain lens, interference occurs between the first image and the second image when viewing the image, and the display quality of the image display device may be degraded. There is sex. The light shielding unit 120 is provided to suppress this.

  The light shielding unit 120 can be realized by dividing each section by a plate-shaped partition as shown in FIG. At this time, the shape that divides each section is a polygon when the light shielding unit 120 is projected onto a predetermined plane (for example, an electronic substrate) of the light source unit 101 from the positive direction of the Z axis. Such a shape is preferable. In the present embodiment, the case where the shape after projection is a hexagon is shown as an example. 2 has a honeycomb structure in which the hexagonal structures are assembled.

  Further, it is preferable that the light shielding portion 120 has a very low reflectance, desirably no reflection, inside the cell (the inner wall of the light shielding portion in the space where the light emitting point, the lens, and the light shielding portion are separated). The light emitted from the light emitting point is basically controlled by the lens around the direct light from the light emitting point. However, when the light reflected by the inner wall of the light shielding portion 120 enters the lens, it is emitted. This is because, since the directions of light are diversified, it is difficult to selectively emit the light from the light emitting point 101a and the light from the light emitting point 101b as described above in specific directions.

  In the example of FIG. 1, the light shielding unit 120 is shown as being in contact with the light source unit 101 and the lens unit 130, but the content described in the present embodiment is not limited to this. As described above, if the light shielding unit 120 suppresses the light from the light emitting point of one cell from entering the lens of another cell, the light shielding unit 120 is not necessarily in contact with the light source unit 101 or the lens unit 130. There is no need.

  Further, as another role of the light shielding unit 120, there is a role of appropriately maintaining a physical interval (distance) between the light source unit 101 and the lens unit 130. In order for each lens 131 of the lens unit 130 to focus the light from the light emitting points 101a and 101b, the light emitting points 101a and 101b need to be positioned at the focal length of the lens 131. In this embodiment, the light shielding unit 120 (the light shielding wall 121) keeps the distance between the light source unit 101 and the lens unit 130 constant, so that the focusing by the lens unit 130 is performed regardless of vibration, gravity, external pressure, and the like. The action and the directionality of the emitted light can be maintained stably.

  The lens unit 130 is an aggregate of a plurality of individual lenses. As shown in FIG. 2, one lens 131 is assigned to one cell. Each lens 131 focuses and emits light from the light emitting point of the cell in a specific direction due to the optical characteristics of the lens 131. In each lens 131 of the lens unit 130 described in this embodiment, light emitted from a plurality of light emitting points 101a and 101b in the cell is incident according to the positional relationship between each light emitting point and the lens. The light is focused and light from each light emitting point is emitted in a specific direction.

  In this method, the direction of light emitted from the lens is selected based on the difference in the positions of the light emitting points 101a and 101b with respect to the lens using the optical characteristics of the lens. By utilizing this principle, by appropriately selecting the positions of the light emitting points 101a and 101b with respect to the lens, the emission directions of the image light having the light emitting point 101a as the light source and the image light having the light emitting point 101b as the light source can be changed. It can be in different directions.

  Here, the position of the light emitting point with respect to the lens 131 is mainly determined by the direction of “shift” (offset) in the direction perpendicular to the optical axis with respect to the optical axis of the lens 131, the size, and the like. Although it is an element, it is not limited to this.

  Each lens 131 of the lens unit 130 may be a single lens or a combined lens, and may be a Fresnel lens or a diffractive lens in order to reduce the thickness. Further, for example, a liquid crystal element panel that can electrically change the emission direction may be used.

  The first diffusion unit 140 receives light that has passed through the lens unit 130, diffuses the incident light in a predetermined direction, and emits the light in the Z direction. In particular, the first diffusion unit 140 described in the present embodiment desirably has a performance in which the diffusion direction is different in the X direction and the Y direction in the XY plane. In particular, in order to increase the viewing angle in the vertical direction (Y direction) of the image display device, it is desirable to increase the diffusivity in the Y direction of the first diffusion unit 140. In addition, when the image display device can selectively view the first image and the second image in the horizontal direction (X direction) in the horizontal emission direction (horizontal angle, etc.) of the image light. The horizontal diffusion rate of the first diffusion unit 140 is preferably relatively small. That is, the first diffusion unit 140 is preferably a diffusion plate having anisotropic characteristics with different diffusion rates in the horizontal direction and the vertical direction. In the above description, the case where the first image and the second image can be selected at an angle in the horizontal direction is taken as an example, but the contents described in the present embodiment are not limited to this. When the image selection direction is the vertical direction or the like, the direction of the diffusion rate of the first diffusion unit 140 may be large in the horizontal direction and small in the vertical direction.

The spacer 150 is a member for maintaining a separation distance provided between the first diffusion unit 140 and the second diffusion unit 160 so as to maintain a predetermined distance. However, since the spacer 150 needs to transmit the light emitted from the first diffusing unit 140 and enter the second diffusing unit 160, it is necessary to transmit the light in the Z-axis direction at least.

  The second diffusion unit 160 uses the light emitted from the first diffusion unit 140 and transmitted through the spacer 150 as incident light. Similar to the first diffusion unit 150, the second diffusion unit 160 diffuses the incident light therein, and diffuses the direction of the emitted light to be equal to or greater than the direction of the incident light. Note that, like the first diffusion unit 140, the second diffusion unit 160 preferably has a characteristic in which the magnitude of diffusion differs between the horizontal direction and the vertical direction.

  The modulation panel 170 performs processing such as transmitting or blocking (decreasing) light emitted from the second diffusion unit 160 according to an image signal input to the image display device. This is done for the area. The modulation panel 170 can be realized by a liquid crystal panel, for example. The modulation panel 170 is controlled according to the first image signal when the first image light is emitted, and the second image when the second image light is emitted. It is controlled according to the signal.

<About the positional relationship between the shape of the light-shielding part and the light emitting point>
FIG. 4 is a projection view when the positional relationship between the light emitting points 101a and 101b of the light source unit 101 described in the present embodiment and the light shielding wall 121 of the light shielding unit 120 is viewed from the positive direction of the Z axis. The shape of the light shielding wall 121 is shown as a shape when a portion closest to the corresponding lens 131 is projected.

  FIG. 4A shows an example in which the shape of the light shielding portion 120 in FIG. 2 is adopted. In this case, the shape of the light shielding wall 121 forming each cell is a hexagonal shape. The light emitting points 101a and 101b are arranged on a diagonal line connecting the vertices of the hexagonal shape of the light shielding wall 121. That is, the straight line connecting the light emitting points 101a and 101b is in a positional relationship with the straight line connecting the apexes facing the hexagon.

  The light emitting points 101a and 101b, which will be described in more detail with reference to FIG. 4A, are at points x and y, respectively. The side ab is in a positional relationship that forms an angle θ1 with respect to the straight line xy that connects the light emitting points 101a and 101b. The side bc is in a positional relationship that forms an angle θ2 with respect to the straight line xy. The side de is in a positional relationship that forms an angle θ4 with respect to the straight line xy. The side ef is in a positional relationship that forms an angle θ5 with respect to the straight line xy. The side fa and the side cd are parallel to the straight line xy. In the case of FIG. 4A, there is no side that is substantially perpendicular to the straight line xy. That is, none of the portions of the light shielding wall 121 is substantially perpendicular to the straight line connecting the light emitting points 101a and 101b.

  FIG. 4B shows an example in which the shape of the light shielding wall 121 is a quadrangle. In this case, the light emitting points 101a and 101b are arranged on the diagonal line connecting the opposing vertices of the quadrangular shape of the light shielding wall 121. That is, the straight line connecting the light emitting points 101a and 101b is in a positional relationship with the straight line connecting the opposing vertices of the quadrangle.

  This will be described in more detail with reference to FIG. The side ab is in a positional relationship that forms an angle θ1 with respect to the line segment xy connecting the light emitting points 102a and 102b. The side bc is in a positional relationship that forms an angle θ2 with respect to the straight line xy. The side cd is in a positional relationship that forms an angle θ3 with respect to the straight line xy. The side da is in a positional relationship that forms an angle θ4 with respect to the straight line xy. None of the sides of any light shielding wall 121 has a vertical positional relationship with respect to the straight line xy. Also in this case, as in FIG. 4A, any portion of the light shielding wall 121 is not in a positional relationship that is substantially perpendicular to the straight line connecting the light emitting points 101a and 101b.

  FIG. 4C shows an example in which the light shielding wall 121 is a hexagon as in the case of FIG. The difference from FIG. 4A is that the straight line connecting the light emitting points 101a and 101b does not coincide with the straight line connecting the vertices facing the hexagon. In the example of FIG. 4C, the light emitting points 101a and 101b are positioned so that the straight line on one side of the light shielding wall 121 is substantially perpendicular to the straight line connecting the light emitting points 101a and 101b. And are arranged.

  FIG. 4D illustrates an example in which the light shielding wall 121 has a quadrangular shape as in FIG. 4D is different from FIG. 4B in that the straight line connecting the light emitting points 101a and 101b does not coincide with the straight line connecting the vertices of the square. In the example of FIG. 4D, the light emitting points 101a and 101b are positioned so that the straight line on one side of the light shielding wall 121 is substantially perpendicular to the straight line connecting the light emitting points 101a and 101b. And are arranged.

  In this embodiment mode, as shown in FIGS. 4A and 4B, the sides constituting the shape of the light shielding wall 121 are not perpendicular to the straight line connecting the light emitting points 101a and 101b. It is preferable. More substantially, it is preferable to avoid that the angle formed by any side constituting the shape of the light shielding wall 121 and the straight line connecting the light emitting points 101a and 101b is near a right angle (90 degrees).

<Installation of diffusion part>
FIG. 5 is a diagram illustrating a state in which image light propagates from the image display device. FIG. 6 is a diagram showing from which part the light of the image light seen by the viewer has propagated.

  FIG. 5A is a diagram illustrating an example in the case where a diffusion unit is not provided in the image display device. Image light emitted from the light emitting points 101 a and 101 b is incident on the lens 131. The lens 131 receives only the light emitted from the corresponding light emitting points 101 a and 101 b by the light shielding wall 121. The lens emits the incident image light to the front surface (Z-axis square) as a bundle of light parallel to the Z-axis.

  The light emitted from the lens 131 is only a component parallel to the Z axis. For this reason, there is no light incident on the lens 131 in the portion where the lenses are adjacent, in particular, the portion where the light shielding wall 121 is present, and light of a component parallel to the Z axis is not emitted in that portion. Actually, the light shielding wall 121 has a thickness as a member. Therefore, there is a portion where light is not emitted only by the thickness of the light shielding wall 121.

  When the viewer views an image from the image display device configured as shown in FIG. 5A, a closed curve formed by connecting a portion of the light shielding wall 121 closest to the lens 131 appears as a shadow (FIG. 6A). This can be very annoying when viewing images.

  FIG. 5B is a diagram illustrating an example where the first diffusion unit 150 is provided on the front surface of the lens 131 in the configuration of FIG. By providing the first diffusion unit 150 on the front surface of the lens 131, the image light from the image display device is diffused and emitted as a whole, which is considered to be improved. However, in reality, since there is no image light incident on the first diffusing portion in the portion of the light shielding plate 121, even if the light incident on the first diffusing portion 150 is diffused, the light travels in this direction. When observed from the above, the shadow of the light shielding plate 121 remains. In FIG. 6B corresponding to FIG. 5B, it can be understood that there is no light ray from the shadow portion toward the viewer's eyes.

  FIG. 5C is a diagram illustrating an example where the second diffusion unit 170 is further provided in the front direction in the configuration of FIG. A spacer 160 is provided between the first diffusion unit 150 and the second diffusion unit 170. In the case of the configuration shown in FIG. 5C, the shadow portion of the light shielding plate 121 generated by the first diffusion unit 150 is diffused by the second diffusion unit 170, so that the light shielding plate 121 can be obtained from the viewing image. It is possible to suppress the influence of shadows due to (FIG. 6C).

<About arrangement | positioning with a 1st spreading | diffusion part and a 2nd spreading | diffusion part>
The first diffusing unit 150 and the second diffusing unit 170 in FIG. 5C affect the effect of suppressing the shadow of the light shielding plate 121 due to the distance between the diffusing units. Therefore, in the following, this interval will be described in detail.

  When the distance between the first diffusion unit 150 and the second diffusion unit 170 is z, it is desirable that this distance z satisfies the following condition.

  Here, t indicates the effective thickness of the light shielding plate 121 at the portion closest to the lens 131. θ represents an angle formed by a projected side of the light shielding plate 121 described with reference to FIG. 2 and a straight line connecting the light emitting points 102a and 102b. φ is an angle (FIG. 5C) measured by the full angle of the light diffused by the first diffusion unit 150.

  The first half portion t / cos θ of the right side of this equation corresponds to the effective wall thickness of the light shielding plate 121 converted to the light diffusion direction of the first diffusion portion 140. The second half portion 1 / (2 tan (φ / 2)) on the right side is converted into an interval necessary to send all light to the shadow portion caused by the wall of the light shielding plate 121 by the action of the first diffusion unit 140. Is the coefficient.

  Moreover, it demonstrated as follows in FIG. In other words, in the present embodiment, it is preferable that the sides constituting the shape of the light shielding wall 121 are not perpendicular to the straight line connecting the light emitting points 101a and 101b. More substantially, it is preferable to avoid that the angle formed by any side constituting the shape of the light shielding wall 121 and the straight line connecting the light emitting points 101a and 101b is near a right angle (90 degrees).

  This is because, in t / cos θ in the first half of the above equation, the interval z may become infinite when the value of θ is a right angle, ie, near 90 degrees. When z is infinite, it is indicated that the influence of the light not being emitted due to the thickness of the light shielding wall 121 may extend to infinity. Therefore, in the present embodiment, the value of θ, that is, a straight line connecting the light emitting points 101a and 101b, and a side having a shape when the light shielding wall 121 is projected are set so that the value of cos θ is not excessively small. It is considered preferable to set the angle so as not to be a right angle or to be within a predetermined range from the right angle.

  In addition, said formula prescribes | regulates the angle which the side with the light-shielding wall 121 and the straight line which connects the light emission points 101a and 101b make. The distance z is calculated in the same manner for all other sides of the light shielding wall 121, and the maximum value z among them is actually adopted as the installation distance between the first light shielding part 150 and the second light shielding part 170. It may be a thing.

  By setting the first light-shielding part 150 and the second light-shielding part at suitable intervals, it is possible to suppress the influence of the shadow of the light-shielding wall 121 on the image displayed by the image display device. This is due to the effect of the second diffusing unit 160 that the light rays directed toward the viewer's eyes are complemented in the shaded portion of the light shielding plate 121 as shown in FIGS. 5 (C) and 6 (C). Thereby, it can suppress that the viewer perceives the shadow of the light shielding plate 121.

  In the above description of the embodiment, the image display device has described the first image and the second image. The first image and the second image may be images with independent contents, or may be related images such as a left-eye image and a right-eye image of a stereoscopic image. May be.

  When the image displayed by the image display device is a stereoscopic image, the first light emission point 101a emits image light of an image for the right eye, for example, and the second light emission point 101b is an image of the image for the left eye. Emits light.

  In the present embodiment, the case where the image display device displays two images, the first image and the second image, has been described. However, the image display device displays a larger number of images. There may be. In this case, it is possible to cope with this by increasing the number of light emission points and the like accordingly.

(Summary)
The image display device described in this embodiment has the following features. The image display device displays the first image and the second image. For example, the first image and the second image may be related images such as a left-eye image and a right-eye image of a stereoscopic image, or may be completely independent images. Good. The image display device includes a light source unit that generates image light of the first image and image light of the second image. In the light source unit, the first light emission point for generating the image light of the first image and the second light emission point for generating the second image light may be independent, A single light source may be used. Further, the number of light emitting points is not limited to these two, and a larger number of light emitting points may be provided. The light source unit has a configuration in which a plurality of first light emitting points and second light emitting points are arranged in a plane or the like.

  The image display apparatus includes a lens unit that focuses light from the light source unit and outputs the light as a parallel light beam. The lens unit assigns one lens to each of a set of the first light emission point and the second light emission point of the light source unit. The lens is formed by arranging these individual lenses in a substantially planar shape.

  Light shielding that splits the optical path of the image light from the light emitting point to the lens between the first light emitting point and the second light emitting point of the light source unit and the corresponding lens from the light paths of other combinations. Provide walls. The light shielding wall prevents light from adjacent light emitting points from entering the lens. The aggregate of the light shielding walls is a light shielding portion. The light shielding part, which is an aggregate of the light shielding walls, has a honeycomb shape that opens to the light source part side and the lens side. The shape of each opening of the honeycomb shape has a polygonal shape such as an octagon, a hexagon, a pentagon, and a quadrangle. At this time, regarding the positional relationship between the shape of the opening and the light emitting point, when the straight line connecting the first light emitting point and the second light emitting point and the shape of the opening are projected on the same plane, The angle formed by the straight line and any side of the shape of the opening is not a right angle. Thereby, as described in the above embodiment, it is possible to suppress the infinite distance when the interval between the first diffusion unit and the second diffusion unit is suitably set. Regardless of the polygonal shape of the light shielding wall, the orientation of the polygonal shape is determined according to the positional relationship between the first light emitting point and the second light emitting point. In the case where the first light emission point and the second light emission point are arranged in the horizontal direction, the arbitrary side of the opening of the light shielding wall is arranged so as not to be a vertical side.

The image display device further includes a first diffusion unit that diffuses light emitted from the lens.
The image light emitted from the first diffusing portion passes through a spacer that keeps the distance between the first diffusing portion and the second diffusing portion at a predetermined value or more, and enters the second diffusing portion. It is desirable that both the first diffusion portion and the second diffusion portion have a direction in which the diffusion direction is large and a direction in which the diffusion direction is small. At this time, it is desirable that the direction in which the diffusion is large be in the vertical direction of the image display device, and the direction in which the diffusion is small be in the horizontal direction of the image display device. As a result, the viewing angle in the vertical direction of the image display device can be increased, and when the first image and the second image are selectively viewed according to the angle or the like in the horizontal direction, the image is displayed. It becomes possible to suppress mutual interference. In addition, since the image display device uses the two diffusion units, the first diffusion unit and the second diffusion unit, the individual light shielding walls constituting the light shielding unit appear as shadows or the like when viewing the image. Can be suppressed.

  The image display device includes a modulation panel that controls each pixel region based on the first image signal and the second image signal using the light emitted from the second diffusion unit. With this modulation panel, the image content displayed by the image display device is realized using light transmitted from the light source section through the second diffusion section or the like.

(Other embodiments)
As described above, the first embodiment has been described as an example of the technique disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1, and it can also be set as a new embodiment.

  As described above, the embodiments have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided.

  Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

  Moreover, since the above-mentioned embodiment is for demonstrating the technique in this indication, a various change, replacement, addition, abbreviation, etc. can be performed in a claim or its equivalent range.

  The invention described in the present application can be used as an image display device that displays a plurality of images, in particular, displays a left-eye image and a right-eye image of a stereoscopic image.

DESCRIPTION OF SYMBOLS 101 Light source part 101a, 101b Light emission point 120 Light-shielding part 121 Light-shielding wall 130 Lens part 131 Lens 140 1st diffuser 150 Spacer 160 2nd diffuser 170 Modulation panel

Claims (6)

An image display device that displays a first image and a second image,
A light source unit in which a plurality of combinations of a first light emitting point that emits image light for the first image and a second light emitting point that emits image light for the second image are arranged in a substantially planar shape; ,
A plurality of lenses corresponding to a combination of the first light emission point and the second light emission point, a lens portion arranged in a substantially planar shape;
A light-shielding wall that is located between the light source unit and the lens unit and that allows only image light emitted from the first light emission point and the second light emission point of the combination to enter the lens of the lens unit corresponding to the combination. A shading part having,
A first diffusion unit that diffuses and emits image light from the lens unit in a predetermined direction;
A second diffusing section for diffusing and emitting the image light diffused by the first diffusing section in a predetermined direction;
A modulation panel that modulates image light in accordance with image signals of the first image and the second image;
An image display device comprising: The first diffusion unit and the second diffusion unit have a larger diffusion rate in the vertical direction than in the horizontal direction of the image display device.
The image display device according to claim 1. The interval between the first diffusion part and the second diffusion part is z,
When the straight line connecting the first light emitting point and the second light emitting point and the light shielding wall are projected on the same plane, the angle formed by both is θ,
When the light diffusion angle of the first diffusion portion is φ
The image display apparatus according to claim 1, wherein: When the straight line connecting the first light emitting point and the second light emitting point and the light shielding wall are projected on the same plane, the straight line and the side of the light shielding wall are not in a perpendicular relationship. ,
The image display device according to claim 1. The light shielding portion is a honeycomb structure having a hexagonal opening,
The image display device according to claim 1. The first image is one of a left-eye image and a right-eye image of a stereoscopic image, and the second image is the other of the left-eye image and the right-eye image of the stereoscopic image.
The image display device according to claim 1.