JP2010186002A - Image display and electronic device including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display which switches and displays two-dimensional image/three-dimensional image and a multi-view image, and which prevents lowering of image resolution and deterioration of image quality when displaying the two-dimensional image with simple constitution that achieves reduction of cost. <P>SOLUTION: A first illumination means 30 having a linear illuminating light generation part 31 and a second illumination means 20 having a surface illuminating light generation part 21 which are arranged to be spaced at a predetermined interval are disposed in a back surface direction opposite to an observing direction of a display image relative to a light beam transmission type image display means. The image display means 10 is illuminated from an opposite side to the observing direction by the first and second illumination means 30 and 20. When the image display means 10 is illuminated by the first illumination means 30, it displays the three-dimensional image or the multi-view image for an observer. When the image display means is illuminated by the second illumination means 20, it displays the two-dimensional image for the observer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image display device that switches and displays images in different states, such as a two-dimensional image / 3-dimensional image switching type image display device that can switch and display a two-dimensional image and a three-dimensional image.

  In recent years, in the field of video display, various video providing methods have been considered. For example, a three-dimensional video display device that perceives video three-dimensionally and a multi-view monitor that can observe another image from a specific direction are being put into practical use.

  In a three-dimensional image display device, a three-dimensional image display method that realizes a stereoscopic view without using stereoscopic glasses is desired.

  There is a car navigation monitor as a multi-view monitor. There is a monitor arranged near the center console, and there is a two-way monitor that can display a map screen in the driver side direction and a TV image in the passenger side direction. Furthermore, the thing which can display another screen also in the back seat side direction is considered.

  In these display devices, optical elements such as the parallax barrier and lenticular lens are arranged on the upper surface of a pixel type display such as a liquid crystal display panel as a base, and the direction of light emitted from the panel is limited and displayed. By separating a plurality of images according to direction, different images can be displayed with respect to the display direction. In particular, in a three-dimensional image display device, a three-dimensional image is displayed by a perceptual action that promotes stereoscopic vision by separating the left and right images.

  In the method, the optical element that restricts the direction of light emitted from the base panel is arranged on the upper surface of the base panel, so that the resolution of the three-dimensional image and the multi-view image is lower than the resolution of the base panel.

  In general, it is desirable for an image display device to be able to display a supplied image even when it is two-dimensional, and it is also required that the image can be switched and used as a two-dimensional image display device. There was a problem that the resolution was reduced.

  In order to solve the above problem, a three-dimensional image display device has a method of generating an element corresponding to a lenticular lens that restricts the light beam direction with a liquid crystal lens (see Patent Document 1) and a function corresponding to a parallax barrier. A method of generating by a barrier (see Patent Document 2) has been proposed.

  In any of the above-described methods, the three-dimensional image display and the two-dimensional image display are switched by electrically controlling the liquid crystal for the onset and disappearance of the stereoscopic direction light beam direction limiting function, which is a three-dimensional image. The function of restricting the direction of light rays for stereoscopic viewing is eliminated, and the display can be performed at the resolution of the base panel when displaying a two-dimensional image, so that a decrease in display resolution when displaying a two-dimensional image can be suppressed. Similarly, it is considered that a decrease in display resolution at the time of displaying a two-dimensional image can be suppressed even in a multi-view monitor.

  However, any of the above methods requires a liquid crystal panel that exhibits a light beam direction limiting function for stereoscopic viewing, in addition to a base panel for image display and illumination means for illuminating the base panel.

  Along with this, a circuit, a power source, a wiring member, and the like related to the control of the liquid crystal panel that exhibits the light beam direction limiting function are required, and there are problems such as a complicated configuration and high price. In addition, the insertion of a liquid crystal panel that exhibits a light beam direction limiting function affects the image optically, such as birefringence, and there is a concern that the display image quality may deteriorate.

JP 2000-102038 A JP 2005-258222 A

  The present invention has been made in view of the above-mentioned problems, and relates to a two-dimensional image / 3-dimensional image and a multi-view image switching type image display device, which can reduce image resolution and prevent image quality deterioration during two-dimensional image display. It is realized with a simple configuration that can reduce the cost.

In order to solve the above problems, an image display device according to the present invention provides:
A first illuminating means having an elongated linear illumination light generation unit arranged at a predetermined interval;
A planar illumination light generation unit having an aspect ratio obtained by dividing the length by the width is at least smaller than that of the linear illumination light generation unit, and one of the first illumination means is selectively turned on. A second illumination means;
If the side observed by the observer is expressed as the front side by the first illumination unit and the second illumination unit, the image display unit is illuminated from the back side and displays the image by controlling the transmission amount and transmission wavelength of the illumination light. With
The image display means displays a first image when illuminated by the first illumination means;
The image display means displays a second image when illuminated by the second illumination means.

  According to the image display device of the present invention, switching between the first image and the second image display in a state different from that of the first image can be realized by switching the illumination unit provided on the back surface of the image display unit. Therefore, images with different states can be displayed with a simple configuration, and the cost can be reduced.

  Furthermore, since switching between linear illumination and planar illumination can be performed by the illumination means itself, means for optically affecting the image such as birefringence is inserted between the illumination means and the image display means. Therefore, a high quality image can be obtained.

In addition, an image display device according to an embodiment of the present invention includes:
The first image is an image synthesized from a plurality of images taken from different parallax directions of the same object, or an image synthesized from a plurality of different images taken from different objects,
The second image is an image obtained from one image;
One of the first image and the second image is displayed on the image display means.

  According to the image display device of the present invention, for example, in the case of observing a three-dimensional image, the first image can have a parallax image, and the plurality of linear first illumination means spaced apart from each other by the predetermined interval. By illuminating, light rays through images obtained from different parallax are incident on the right and left eyes of the observer. An observer observes the observed image into right and left images, and observes a three-dimensional image by a perceptual action that promotes stereoscopic vision without using dedicated glasses.

  Further, since the second image has only an image obtained from one viewpoint, it is illuminated on the observer's right eye and the observer's left eye by being illuminated by the planar second illumination means. Then, a light beam through the same image enters and a two-dimensional image is observed.

  In the image display device according to an embodiment of the present invention, the predetermined intervals of the plurality of linear light sources are equally spaced in the parallax direction of the first image displayed by the image display means.

  By setting equal intervals, the pixels of the image display means can be effectively used for cases where the intervals are not equal.

In addition, an image display device according to an embodiment of the present invention includes:
The first illumination means comprises:
A light guide;
A light source such as an optical semiconductor such as an LED (Light Emitting Diode) or LD (Laser Diode) that emits light to the light guide;
A linear illumination light generation unit such as a linear opening or protrusion provided in the light guide is formed.

  With such a configuration, linear illumination light can be realized at low cost.

  The image display apparatus according to an embodiment of the present invention is characterized in that the emitted light from the first illumination unit is not scattered by the second illumination unit.

  By adopting such a configuration, a two-dimensional image comparable to a display device dedicated to a two-dimensional image can be obtained while being a two-dimensional image / 3-dimensional image and multi-view image switching type image display device.

  In addition, by employing the image display apparatus according to an embodiment of the present invention in an electronic device, an electronic device that can display both a high-quality two-dimensional image, a three-dimensional image, and a multi-view image can be realized at low cost.

  According to the image display device of the present invention, a basic configuration of a base panel such as a liquid crystal panel as an image display means and an illuminating means for illuminating the base panel can be used to observe a three-dimensional image or a multi-view image without dedicated glasses. it can. Moreover, it can be used without reducing the image resolution even when a two-dimensional image is displayed by simply switching the illumination means.

  Therefore, the configuration is simple, and the cost of the apparatus can be reduced. In addition, no means for optically influencing the image such as birefringence is inserted between the illumination means and the base panel as the image display means, and a high quality image can be obtained.

It is a figure for demonstrating the case where a three-dimensional image is displayed using the image display apparatus of 1st Embodiment of this invention. It is a figure for demonstrating the case where a two-dimensional image is displayed using the image display apparatus of 1st Embodiment of this invention. It is a figure for demonstrating the three-dimensional image generation principle. It is a figure for demonstrating the three-dimensional image generation principle. It is a figure for demonstrating the image display apparatus of 2nd Embodiment of this invention. It is a figure for demonstrating the image display apparatus of 3rd Embodiment of this invention.

  Examples of the three-dimensional image display device will be described below. In the following description of the embodiments, members having the same functions and actions are denoted by the same reference numerals and description thereof is omitted.

(First embodiment)
1 and 2 are diagrams for explaining an image display device 1 according to the first embodiment. FIG. 1 is a state when a three-dimensional image that is a first image is displayed, and FIG. 2 is a two-dimensional image that is a second image. It is a figure explaining the state at the time of a display.

  The image display means 10 is a base panel for displaying a display image that is the basis of an observed image, and is a transmissive display panel, for example, a liquid crystal panel.

  Illumination light is incident on the image display means 10 from the back side when viewed from the observation direction, and the transmission amount and transmission wavelength of the illumination light are controlled by the display image.

  The illumination light whose transmission amount and transmission wavelength are controlled by the display image is emitted to the observer side and is observed by the observer as a two-dimensional image or a three-dimensional image.

  In the first embodiment, a case where an optical semiconductor such as an LED as a light guide and a light source is used as the illumination unit will be described.

  The illuminating means includes a first illuminating means 30 for displaying a three-dimensional image and a second illuminating means 20 for displaying a two-dimensional image stacked on the front side which is an observer side with respect to the first illuminating means 30. .

  The first illumination means includes a first light guide 33 and a first LED 35 that is a light source.

  The 2nd illumination means is comprised by 2nd LED25 which is the 2nd light guide 23 and a light source.

  The first LED 35 and the second LED 25 may be a cold cathode tube or the like, but an optical semiconductor such as an LED or an LD is preferable because of good coupling to the light guide.

  A desired image is displayed on the image display means 10, and ON / OFF control of the first LED 35 and the second LED 25 is performed by a microcomputer (not shown), and the first image is displayed as a three-dimensional image and the second image. A certain two-dimensional image display is switched. Desired image data is stored in image storage means (memory or the like) (not shown) and read out as appropriate.

  The generation of a display image when displaying a three-dimensional image as the first image will be described with reference to FIGS. 3 and 4 as an example of a method of generating a multi-view display image having 6 parallaxes.

  First, it is necessary to obtain an original image on which a three-dimensional image is to be displayed. For this, if the parallax direction of the observer is the horizontal direction, the target object is photographed with a camera or the like from six different directions in the horizontal direction. It is assumed that the obtained six images are the first image 41 to the sixth image 46 as shown in FIG. Parallax is obtained for each image in the horizontal direction, which is the parallax direction of both eyes of the observer.

  Next, each image is divided into a plurality of vertical directions that are perpendicular to the parallax direction so that the observer can observe an image having a specific parallax by the light beam direction limiting means.

  FIG. 3B shows an example in which the first image 41 is divided into 12 parts. Here, each divided image is referred to as a divided image. A code from A to L is assigned in order from the left divided image to distinguish them as divided image codes. By this work, divided images A to L are obtained for each of the first image 41 to the sixth image 46.

  Next, with respect to the first image 41 to the sixth image 46, divided images having the same divided image code are collected to create 12 sets of element images 16. Each element image 16 is rearranged in the order of divided image codes A, B,..., L as shown in FIG. 3C to create a display image 48 displayed on the image display means 10.

  The first image 41 to the sixth image 46 may be actual images or images created by computer graphics.

  A case where the rearranged display image 48 displayed on the image display means 10 is observed is shown in FIG. The left and right eyes of the observer are in positions indicated by the observer's right eye 71 and the observer's left eye 72 with respect to the image display means 10.

  If the light source having the linear illumination light generation unit 31 is arranged at the position shown in FIG. 4A, the light beam that has passed through each of the divided images of the second image 42 appears on the viewer's right eye. The light beam that has passed through each of the divided images of the third image 43 is incident on. That is, the second image 42 is projected to the right eye, and the third image 43 is projected to the left eye.

  These two images have parallax because they are images obtained when the same target object is viewed from different directions. Therefore, the observer can recognize as a three-dimensional image.

  As shown in FIG. 4A, the linear illumination light generation unit 31 is arranged in a straight line passing through the elemental images arranged at equal intervals from the observer's right eye 71 and left eye 72. desirable.

  Although it is possible to allow the linear illumination light generation unit 31 to be observed as a three-dimensional image even if it is not equally spaced, in this case, the illuminated element images are not equally spaced and are not necessary between the element images. Pixels may occur. In this case, the number of pixels that can be effectively used for the pixels in the base panel, which is the image display means 10, is reduced.

  In the first embodiment, since the direction of the divided sides of the element image is perpendicular to the parallax direction, the linear illumination light generation unit 31 that is a light emission point needs to extend in this direction. The linear illumination light generation unit 31 extends linearly with respect to the depth direction of the paper.

  An area that can be viewed stereoscopically as a three-dimensional image, that is, a viewing area will be described with reference to FIG. S1 represents a viewing distance from the image display means 10 to the observer, and S2 represents a viewing area that is a three-dimensional image observable area.

  By setting the arrangement of the linear illumination light generation unit 31, the viewing zone S2 is set at the viewing distance S1 from the image display means 10. In the case of the first embodiment, since there are six parallaxes, the first image 41 to the sixth image 46 are projected within the viewing zone S2. When different images are projected on the right eye 71 and the left eye 72 of the observer, a stereoscopic view that is a three-dimensional image can be observed. Therefore, if the length S3 in the parallax direction of one image projection area is set to be equal to or smaller than the distance between the right eye 71 and the left eye 72 of the observer, the observer can always obtain an image having parallax. Thus, a three-dimensional image can be observed in the viewing zone S2.

  The first illumination means 30 for displaying a three-dimensional image according to the first embodiment will be described with reference to FIG.

  The first light guide 33 is made of a material that transmits visible light. For example, acrylic or glass is used. The light guide 33 is disposed on the back surface side opposite to the viewer side of the image display means 10.

  A light source such as an LED or LD, which is an optical semiconductor, is disposed on the end surface of the first light guide 33 to combine the light beams. Here, the first LED 35 is disposed.

  The linear illumination light generation unit 31 is provided on the surface of the first light guide 33 on the image display means 10 side. Here, it is assumed that slits 37 in which openings and light shielding portions are alternately arranged are provided. The slit 37 is assumed to extend in the depth direction of the paper.

  The slit 37 is formed, for example, by using a sputtering method or a vacuum deposition method through a metal mask or the like with a thin film with little visible light absorption such as an Al film.

  Moreover, the 1st diffused light production | generation means 39 is provided in the surface on the opposite side to the image display means 10 side of the 1st light guide 33. As shown in FIG. The first diffused light generating means 39 acts to scatter the propagating light P1 traveling through the first light guide 33.

  The first diffused light generating means 39 includes, for example, a method in which white ink or bead ink is printed on the surface and a method of forming minute irregularities on the surface. The propagating light P <b> 1 in the first light guide 33 is scattered by these printed materials and structures.

  When the first LED 35 is turned on, the light beam propagates after being coupled to the first light guide 33, and diffused light is generated in the first light guide 33 by the first diffused light generating means 39. The diffused light is emitted from the linear illumination light generator 31 that is an opening of the slit 37 to the outside of the first light guide 33 as emitted light R1 and emitted light L1, and illuminates the image display means 10.

  In the first embodiment, the opening of the slit 37 functions as the linear illumination light generator 31. When the rearranged display image 48 is displayed on the image display means 10, for example, the second image is transmitted to the observer's right eye 71 via the emitted light R1, and the emitted light L1 is applied to the observer's left eye 72. For example, the third image is displayed via the, and a three-dimensional image can be observed.

  Next, the 2nd illumination means 20 for the two-dimensional image display of this 1st Embodiment is demonstrated using FIG.

  The second light guide 23 is disposed so as to be stacked on the viewer side with respect to the first light guide 33.

  The second light guide 23 is also made of a material that transmits visible light, and for example, acrylic, glass, or the like is used.

  The second light guide 23 is disposed between the image display means 10 and the first light guide 33. A second diffused light generating means 29 for generating the diffused light beam D1 is provided on the surface of the second light guide 23 opposite to the image display means 10.

  The second diffused light generating means 29 scatters the propagating light P2 propagating through the second light guide 23. As a method for producing the second diffused light generation means 29, for example, there are a method in which white ink or bead ink is printed on the surface, and a method in which minute irregularities are formed on the surface.

  For example, a second LED 25 is disposed on the end face of the second light guide 23 as a light source for displaying a two-dimensional image that is a second image, and a light beam is coupled into the second light guide 23. When the second LED 25 is turned on, the light beam propagates through the second light guide 23 after being coupled to the second light guide 23 from the end face. The light beam is then scattered by the second diffused light generating means 29, and a diffused light beam D1 is generated.

  The diffused light beam D1 is emitted from the planar illumination light generation unit 21 that is the surface on the viewer side of the second light guide, and the image display means 10 is illuminated, so that a two-dimensional image can be displayed.

  Here, although it is a position where the second diffused light generating means 29 is formed, the emitted light R1 from the first light guide 33 that illuminates the display image 48 displayed on the image display means 10, as shown in FIG. And it is necessary to form in the position which does not become obstructive with respect to the optical path of the emitted light L1.

  Consider a case where the second diffused light generating means 29 is formed on the entire surface without an opening, for example, like the first diffused light generating means 39.

  Since the second light guide 23 and the first light guide 33 are arranged so as to overlap each other, the emitted light R1 and the emitted light L1 emitted from the linear illumination light generator 31 are converted into the second diffused light generator 29. As a result, the light is further scattered and unnecessary stray light is generated.

  In this case, crosstalk occurs between the parallax images in the viewing zone S2, and a ghost phenomenon occurs such that the three-dimensional image looks double, or the three-dimensional image itself cannot be observed. Quality degradation occurs.

  With the configuration described with reference to FIGS. 1 and 2, when displaying a three-dimensional image, the rearranged display image 48 is displayed on the image display means 10, and the first LED 35 is turned on, so that 3 Dimensional images can be provided.

  Further, when displaying a two-dimensional image that is a normal image without parallax, the two-dimensional image desired to be displayed is displayed on the image display means 10 and the second LED 25 is turned on to provide the viewer with the two-dimensional image. I can do it.

  Although the two-dimensional image can be observed by turning on the first LED 35, in this case, since the first light guide 33 has an action of restricting observation of a specific pixel, the observer is in a horizontal direction. For example, in this embodiment, only 1/6 of the image is projected on all the pixels. Therefore, the resolution of the observation image is substantially reduced.

  Therefore, in order to display a normal two-dimensional image without reducing the resolution, it is desirable to turn on the second LED 25 and illuminate the display panel with the second light guide 23.

  The display content and the switching control of the second LED 25 and the first LED 35 are controlled by a microcomputer (not shown).

  Also, by mounting the image display device 1 of the first embodiment on a portable terminal such as a mobile phone or a portable game terminal, for example, a single image display device can display a high-quality two-dimensional image and 3 A portable terminal capable of displaying both dimensional images can be realized at low cost. As compared with the case where a plurality of image display devices are provided, it is possible to reduce costs and save space.

  In addition to mobile terminals such as mobile phones and mobile game terminals, it can be installed in stationary electronic devices such as pachinko machines, and can display both high-quality 2D and 3D images. Can be realized at low cost. As compared with the case where a plurality of image display devices are provided, it is possible to reduce costs and save space.

(Second embodiment)
A second embodiment of the present invention will be described with reference to FIG.

  The second embodiment is different from the first embodiment in that the first illumination unit 30 including the first light guide 33 and the first LED 35 is the image display unit 10, the second light guide 23, and the second LED 25. It differs in the point arrange | positioned between the 2nd illumination means 20 comprised by these.

  The first light guide 33 according to the second embodiment will be described with reference to FIG. The first light guide 33 is made of a material that transmits visible light, and uses, for example, acrylic, glass, or the like.

  On the opposite side of the first light guide 33 from the image display means 10 side, a linear illumination light generator 38 is provided to generate the emitted light R1 and the emitted light L1 that are the three-dimensional image display light beams. Here, a substantially triangular projecting structure is provided.

  The linear illumination light generation unit 38 extends linearly in the depth direction of the paper.

  As illustrated in FIG. 5B, when the first LED 35 that is a light source for displaying a three-dimensional image is turned on, the propagation light P <b> 1 propagates through the first light guide 33, but the linear illumination light generation unit 38. At the protrusion, the reflection angle of the propagating light changes and is emitted to the outside of the first light guide 33 to illuminate the image display means 10.

  Since the linear illumination light generation unit 38 has the same function as the linear illumination light generation unit 31 of the first embodiment, the rearranged display image described in the first embodiment is displayed on the image display unit 10. If 48 is displayed, a three-dimensional image can be observed.

  Next, the second light guide 23 will be described. FIG. 5C shows a diagram in the case of being arranged together with the first light guide 33.

  The second light guide 23 is also made of a material that transmits visible light, and for example, acrylic, glass, or the like is used.

  The second diffused light generating means 29 is provided on the surface of the second light guide 23 opposite to the image display means 10 side. The second diffused light generating means 29 is configured to print, for example, white ink or bead ink on the surface so as to scatter propagating light (not shown) propagating through the second light guide 23, The surface is formed by minute unevenness.

  For example, a second LED 25 that is a light source for two-dimensional image display is disposed on the end face of the second light guide 23, and the light beam is coupled to the second light guide 23.

  When the second LED 25 is turned on, the combined light beam propagates through the second light guide 23, and the diffused light beam D <b> 1 is generated by the second diffused light generating unit 29.

  The diffused light beam D <b> 1 is emitted from the planar illumination light generation unit 21 that is a surface on the viewer side of the second light guide 23.

  Further, the diffused light beam D1 passes through the first light guide 33, illuminates the image display means 10, and a two-dimensional image can be displayed.

  With the above configuration, when displaying a three-dimensional image, the rearranged display image 48 is displayed on the image display means 10 and the first LED 35 is turned on to provide a three-dimensional image to the observer. .

  When displaying a two-dimensional image which is a normal image without parallax, the two-dimensional image desired to be displayed is displayed on the image display means 10 and the second LED 25 is turned on to provide the viewer with the two-dimensional image. I can do it.

  Display contents and switching control of the second LED 25 and the first LED 35 are controlled by a microcomputer (not shown).

(Third embodiment)
FIG. 6 is a view for explaining a third embodiment of the present invention.

  In the first and second embodiments, the first illuminating means and the second illuminating means are used in a stacked form, but the first illuminating means and the second illuminating means do not necessarily need to be formed in a stacked manner, and are in the same plane. You may make it locate in a shape.

  In FIG. 6A, as in the first and second embodiments, the illumination means is formed by a light guide and a light source for supplying light to the light guide. The difference is that the two illumination means 20 are arranged on the same plane.

    First, the 1st illumination means 30 mainly used for the three-dimensional image display of this 3rd Embodiment is demonstrated.

  The first illuminating means 30 of the present embodiment is formed by a linear light guide 133 in which the light guide itself acts as an elongated linear illuminating means.

  In the first and second embodiments, the linear illumination light generation unit is provided in the first illumination unit 30. However, in this embodiment, the linear light guide 133 on the observer side is provided. It becomes the surface.

  The linear light guide 133 is made of a material that transmits visible light, and uses, for example, acrylic or glass.

  In order to generate outgoing light, which is a light beam for displaying a three-dimensional image, on the surface opposite to the image display means side (not shown) of the linear light guide 133, a diffused light generation means as described in the above embodiment is provided. It has been.

  For example, a first LED 35 as a light source is disposed on the end face of the linear light guide 133 to couple the light beam to the linear light guide 133.

  When the first LED 35 is turned on, propagating light is propagated in the linear light guide 133, but the propagating light is diffused by the diffused light generating means and emitted to the outside of the linear light guide 133, and image display means. Illuminate 10.

  Since the linear light guide 133 itself has the same function as the linear illumination light generation unit 31 of the first embodiment, the rearranged display image described in the first embodiment is displayed on the image display means 10. If 48 is displayed, a three-dimensional image can be observed.

  Next, the 2nd illumination means 20 for the two-dimensional image display of this 3rd Embodiment is demonstrated.

  The second illumination means 20 of this embodiment is formed by a planar light guide 123 and the linear light guide 133.

  In addition, in the said 1st and 2nd embodiment, the planar illumination light generation part was provided in the 2nd illumination means 20, However, In this embodiment, the observer side of the planar light guide 123 is provided. It is formed by the surface and the surface of the linear light guide 133 on the viewer side.

  The planar light guide 123 itself has a planar shape in which the aspect ratio obtained by dividing the length by the width is at least smaller than that of the first illumination unit, and is opposite to the image display unit side (not shown). The surface is provided with diffused light generating means as described in the above embodiment, and is alternately arranged in parallel with the first illumination means 30.

  The planar light guide 123 is made of a material that transmits visible light. For example, acrylic or glass is used.

  For example, the second LED 25 that is a light source is disposed on the end surface of the planar light guide 123, and the light is coupled to the planar light guide 123 to form the planar sub illumination unit 122.

  When the second LED 25 is turned on, the combined light beam propagates in the planar light guide 123, and diffused light that illuminates the image display unit is generated in the planar sub-illuminating unit 122 by the diffused light generating unit.

  At this time, by turning on the first illumination means 30 at the same time, together with the planar illumination means 122, it functions as the second illumination means 20 that is a planar light source, illuminates the image display means, and is two-dimensional. Images can be displayed.

  If the image display means can be illuminated by only the planar sub-illuminating means 122 and the two-dimensional image can be displayed without turning on the first illumination means 30, only the planar sub-illuminating means 122 can be used. The second illumination unit 20 may be formed.

  In addition, as shown in FIG. 6B, the planar light guide 123 is a light source that supplies light to the planar light guide 123 although it is alternately arranged in parallel with the first illumination means 30. The second LED 25 may be arranged on one end surface of the planar light guide 123 that is perpendicular to the arrangement of the first LED 35 that is a light source that supplies light to the linear light guide 133.

  The planar light guide 123 and the linear light guide 133 can be supplied with light for illuminating the second illumination means 20 from, for example, one end face or two end faces including the other end face. Effects such as a reduction in the number of LEDs to be reduced and a reduction in mounting costs can be obtained.

  Furthermore, the case where the organic EL (Electro Luminescence) illumination 100 is used as a light source is demonstrated using FIG.6 (c).

  When an organic EL is used as the light source, light emission is obtained only in the element portion to which current is supplied.

  A linear light emitting unit 130 and a planar light emitting unit 120 are provided in the organic EL lighting 100. By turning on the linear light emitting unit 130 and the planar light emitting unit 120 individually or simultaneously by a control circuit (not shown), the same operation as that of the linear light guide 133 of the third embodiment is performed. The section 130 is formed, and the planar light emitting section 120 has the same function as the planar light guide 123, and the first illumination means for displaying a three-dimensional image and the second illumination means for displaying a two-dimensional image are provided. can get.

  As described above, by arranging the first illumination means for displaying a three-dimensional image and the second illumination means for displaying a two-dimensional image on the same plane, the image display device can be thinned.

  Although the embodiment of the three-dimensional image display device has been described above, for example, six images that are not related to the parallax are displayed on the first image 41 to the sixth image 46 that are images corresponding to the above-described six parallaxes. By assigning, different images can be observed from six directions.

  In this case, if the length S3 of one image projection area described in FIG. 4B is set to be equal to or longer than the length between the right eye 71 of the observer and the left eye 72 of the observer, One image is observed within the length S3 of the parallax direction of the image projection area.

  In the range of the length S3 in the parallax direction of another image projection area, one image different from the image is observed, and an image different depending on the observation direction can be observed, thereby realizing multi-view.

DESCRIPTION OF SYMBOLS 10 Image display means 16 Element image 20 2nd illumination means 21 Planar illumination light production | generation part 23 2nd light guide 25 25 2nd LED
29 2nd diffused light production | generation means 30 1st illumination means 31, 38 Linear illumination light production | generation part 33 1st light guide 35 1st LED
37 slit 39 first diffused light generating means 41 to 46 first image to sixth image 48 display image 71 observer's right eye 72 observer's left eye 122 planar sub-illuminating means 123 planar light guide 133 linear guide Light body

Claims (6)

A first illuminating means having a linear illumination light generator arranged at a predetermined interval;
A second illuminating unit having a planar illumination light generation unit that is selectively turned on with the first illuminating unit;
An image display apparatus comprising: a transmission-type image display unit that is illuminated from the back direction when viewed from the observation direction by the first illumination unit and the second illumination unit. At the time of illumination with the first illumination means, a first image that is an image obtained from a plurality of images is
When illuminated by the second illumination means, a second image, which is an image obtained from one image,
2. The image display device according to claim 1, wherein the image display device is displayed on the image display means.   The image display apparatus according to claim 1, wherein the first illuminating units are arranged at equal intervals in the parallax direction. The first illumination means includes
A light guide;
A light source that emits light to the light guide;
The image display device according to claim 1, comprising the linear illumination light generation unit.   2. The image display device according to claim 1, wherein light emitted from the first illumination unit is not scattered by the second illumination unit.   An electronic apparatus comprising the image display device according to claim 1.