JP2007163709A - Stereoscopic image display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stereoscopic image display apparatus capable of outputting a bright stereoscopic image even with less power consumption and capable of outputting a stereoscopic image that has practical brightness even though a reflection type apparatus that uses outdoor light as illumination light is adopted. <P>SOLUTION: An image display section 304 displays a flat image in which a right-eye image R and a left-eye image L are alternately disposed. A light-shielding display section 303 displays a barrier stripe such that the right-eye image R is made invisible with the left eye 102 and, at the same time, the left-eye image L is made invisible with the right eye 102. An electrophotoresis display device of an in-plane type eliminates the need for a light polarizing plate used for light-shielding display and that has high transparency for transmission display is used in the light-intercepting display section 303. Consequently, it is possible to display a bright stereoscopic image even with a less-power back light 305. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stereoscopic image display device that stereoscopically views a planar image of an image screen by arranging a light shielding pattern in front of or behind the image screen.

  A stereoscopic image display apparatus has been put to practical use that displays a right-eye image and a left-eye image mixedly on an image screen such as a television screen and allows a stereoscopic image to be observed through a light-shielding pattern arranged at a distance from the image screen. . The shading pattern simultaneously restricts observation of the right eye image by the left eye and observation of the left eye image by the right eye, so that the right eye image recognized by the right eye and the left eye image recognized by the left eye are visually 3D images are recognized.

  Non-Patent Document 1 discloses a parallax barrier type stereoscopic image display technique in which a right-eye image and a left-eye image are striped and alternately arranged on an image screen, and the restriction is performed by a fixed stripe-shaped light shielding pattern. Indicated.

  Patent Document 1 discloses a stereoscopic image display in which a television screen is used as an image display unit and a liquid crystal device is used as a light shielding display unit, and a light shielding screen of the liquid crystal device is arranged in front of the image screen of the television screen to form a stripe light shielding pattern. The device is shown. Here, it is possible to select a stereoscopic mode in which a stripe-shaped light shielding pattern is formed on the liquid crystal device to stereoscopically view an image, and a planar view mode in which the stripe-shaped light shielding pattern is lost and a normal planar image is observed.

  In Patent Document 2, a transmissive liquid crystal display device capable of forming a light-shielding pattern having a pixel pitch smaller than the pitch for arranging the right-eye image and the left-eye image on the image screen is adopted as the light-shielding display unit. A stereoscopic image display device in which the light shielding pattern is variable is shown. Here, by detecting the position of the observer's head and automatically adjusting the interval, width, and position of the light shielding pattern, optimal separation observation of the right-eye image and the left-eye image can be performed from any observation angle and distance. I try to get it.

  In Patent Document 3, one pixel is divided into display cells of three primary colors, and a full color image is displayed on an image screen by controlling charged / shaded for each display cell by moving charged particles between a pair of electrodes. An electrophoretic display is shown.

Japanese Patent Laid-Open No. 3-119889 JP-A-5-122733 JP 2005-266613 A “Theory of Parallels Barriers”, S.A. H. Kaplan, J. et al. SMPTE, Vol. 59, no. 7, pp. 11-21, 1952

  In the stereoscopic viewing technique disclosed in Non-Patent Document 1, half of the light emitted from the image screen is blocked by the light shielding pattern of the light shielding screen, so that the visual brightness is half that of the image screen. In addition, the stereoscopic image display device disclosed in Patent Documents 1 and 2 forms a light-shielding pattern using a light-shielding display device of a liquid crystal element in which a liquid crystal layer is disposed between two polarizing plates, so that the polarizing plate is transmitted. Blocks more than half of the light. And since the transparency of the liquid crystal layer itself is low, the transmittance is only 30% or less even in the transmission region of the light shielding pattern, and the visual brightness of the stereoscopic image is only 10 to 20% of the image screen. Accordingly, observation of a dark stereoscopic image becomes painful in a bright environment, which hinders commercialization of a reflective stereoscopic image display device that uses external light as illumination light. Further, since it is necessary to extremely brighten the image screen in order to obtain a bright stereoscopic image, it is necessary to enhance the backlight when a liquid crystal display device is combined as an image display device. When combined with a TV screen, the output is inevitably high. Therefore, the power consumption of the stereoscopic image display device is increased and the life of the image display device is shortened.

  An object of the present invention is to provide a stereoscopic image display device that can output a bright stereoscopic image even with low power consumption, and can output a stereoscopic image having a practical brightness even with a reflection type that uses external light as illumination light.

  The stereoscopic image display device of the present invention includes an image display means capable of displaying a right-eye image and a left-eye image on an image screen, and restricts observation of the right-eye image by the left eye and observation of the left-eye image by the right eye. Light-shielding display means capable of displaying a light-shielding pattern to be limited on a light-shielding screen at a distance from the image screen. The light-shielding display unit forms an electric field in the first movement space and the charged particles filled in the first movement space arranged on the light-shielding screen, and displays the light-shielding pattern by the charged particles on the light-shielding screen. 1st drive means formed in this.

  In the stereoscopic image display device of the present invention, the charged particles directly control the light shielding / transmission, and form a light shielding pattern with high contrast on the light shielding screen without a polarizing plate. Therefore, compared with the case where a liquid crystal device is used as the light shielding display means, a stereoscopic image which is substantially twice or more bright can be displayed because there is no loss of transmitted light due to the polarizing plate.

  Hereinafter, a stereoscopic image display apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. The stereoscopic image display apparatus of the present invention is not limited to the constituent members of the respective embodiments described below, and various embodiments in which some or all of the constituent members are replaced with other constituent members having equivalent functions. It can be implemented.

  For example, the stereoscopic image display device 100 according to the first embodiment is a transmissive device that performs transmissive illumination using a backlight. However, a reflective surface is disposed on the opposite side of the observation side, and incident light from the observation side is received. You may implement by the reflection type which reflects and illuminates.

  In addition, as long as the particle movement type display device is employed as the light-shielding display unit, the image display unit can use various pixel display methods. Examples thereof include a liquid crystal display device, an electrophoretic display device, a television screen (CRT), a plasma display device, a fluorescent pixel display device, an LED display, a surface electric field display (SED), and an organic EL display device. The image display on the image screen of the image display unit is not limited to black and white gradation, and may be gray scale, single color or multi-color multiple gradation display, and full color display. For example, one pixel can be displayed in full color by arranging R, G, and B color filters in three adjacent sub-pixels. Examples of the particle movement display device employed in the light-shielding display device and the image display device include an electrophoretic display device and a toner display. The electrophoretic display device can adopt an active matrix type in which switching elements formed for each display cell are dynamically controlled by a large number of grid-arranged write signal lines and a large number of scan signal lines. May be adopted.

  In addition, the electrophoretic display device employed as the light-shielding display unit can employ a pixel display device in which minute dot-shaped display cells are arranged in a grid pattern, but arrayed scanning line-shaped display cells that cross the display screen. A scanning line display device may be employed. It is desirable that the light-shielding display unit can adjust the width and position of the light-shielding pattern by performing two-tone display with a line width smaller than the width of the right-eye image (left-eye image) and controlling the light-shielding / transmission.

  Further, the light shielding pattern in the light shielding display unit is not limited to a stripe shape. As shown in Patent Document 2, as long as the observation with the left eye of the image for the right eye and the observation with the right eye of the image for the left eye are simultaneously restricted, various shapes such as dots, various contour spots, diagonal lines, curves, etc. A pattern can be adopted.

  In the following description, the viewer side of the stereoscopic image display device is called “front”, and the opposite side is called “rear”. In addition, the general structure, operation principle, and general manufacturing method of the image display device and the light-shielding display device disclosed in Patent Literatures 1 and 2 and Non-Patent Literature 1 are different from the gist of the present invention, and thus are complicated. In order to avoid this, some illustrations are omitted, and detailed description is also omitted. For the same reason, the detailed structure, manufacturing method, driving method, and the like of the electrophoretic display device disclosed in Patent Document 3 are also partially omitted and detailed description is omitted.

<First Embodiment>
FIG. 1 is an explanatory diagram of stereoscopic image display in the stereoscopic image display device of the first embodiment, and FIG. 2 is an explanatory diagram of flat image display.

  As illustrated in FIG. 1, the stereoscopic image display apparatus 100 according to the first embodiment includes a light shielding display unit 103 disposed in front and an image display unit 104 disposed in the rear, and includes a light shielding display unit 103 and an image display unit 104. A spacer 111 is disposed between them. A backlight 105 is disposed behind the image display unit 104, and illumination light from the backlight 105 passes through the image display unit 104, the spacer 111, and the light shielding display unit 103 and enters the right eye 101 and the left eye 102 of the observer.

  As the light-shielding display unit 103, a transmissive electrophoretic display device in which a moving liquid is filled with a dispersion liquid in which charged particles are dispersed is employed. The light-shielding display unit 103 functions as a spatial light modulation element or a variable parallax barrier pattern, and is controlled by the barrier driving circuit 106 to change the covering state of the light-shielding screen with charged particles. As a result, the barrier stripe (striped light shielding / transmission pattern) is displayed. The barrier stripe blocks the observation of the right eye image R formed on the image display unit 104 by the left eye 102 and the observation of the left eye image L by the right eye 101. The height of the spacer 111 matches the deviation of the visual field range formed by the parallax angle between the right eye 101 and the left eye 102 on the exit side of the barrier stripe with the pitch of the right eye image R and the left eye image L.

  As the image display unit 104, a transmissive liquid crystal display that displays a color image using a TFT liquid crystal panel is employed. When the stereoscopic mode is set, the image display unit 104 is controlled by the display drive circuit to alternately arrange the right-eye observation image R and the left-eye image L and occupy a predetermined area on the image screen. Let

  A part of the light emitted from the backlight 105 is transmitted through the image display unit 104. At this time, the light shielding pattern of the light shielding display unit 103 selectively blocks the transmitted light. Accordingly, only the right eye observation image R is incident on the observer's right eye 101 and only the left eye observation image L is incident on the left eye 102 and observed. In this way, the right-eye image R and the left-eye image L are integrated and recognized by the observer's brain, causing the observer to recognize a stereoscopic image.

  As shown in Patent Document 1, the stereoscopic image display apparatus 100 according to the first embodiment can switch between a stereoscopic mode using a barrier stripe and a planar mode in which the light-shielding display unit 103 is in a fully transmissive state. is there. When the planar view mode is set, the image display unit 104 displays a normal two-dimensional image as shown in FIG. The light shielding display unit 103 is colorless and transparent over the entire light shielding screen without forming a light shielding pattern of barrier stripes. The entire area of the two-dimensional image on the image screen is simultaneously observed by the right eye 101 and the left eye 102 without being blocked by the barrier stripe. Thus, a normal two-dimensional image is recognized by the observer.

  As shown in FIG. 1, the light-shielding display unit 103 includes display cells having a width smaller than the arrangement pitch of the right-eye image R and the left-eye image L in the image display unit 104. Then, under the control of the barrier driving circuit 106, the width, pitch, and position of the barrier stripe can be changed in units of the width of the display cell. The observation condition input unit 110 inputs information such as the position information of the observer and the display area of the stereoscopic image displayed on the image display unit 104. As a result, as shown in Patent Document 2, when the distance between the observer and the display changes, when the position of the observer (distance and viewing angle) changes, and for each observer, the right eye 101 and the left eye It is possible to deal with a difference in distance from 102. The observation condition input unit 110 may be an operation unit such as a keyboard that is manually set, or may be a camera device including an observer detection device that automatically detects the position of the observer, for example, an image recognition device for face detection.

  The image processing unit 108 forms right-eye image (right-eye parallax image) data Rs and left-eye image (left-eye parallax image) data Ls using the parallax image information included in the parallax image source 109. Then, the right-eye image data Rs and the left-eye image data Ls are divided in the horizontal direction to generate left-eye stripe image data and right-eye stripe image data, which are combined into one piece of stripe image data. The display driving circuit 107 drives the image display unit 104 using the combined stripe image data, and outputs the vertically striped left eye image L and right eye image R alternately arranged on the image screen.

  As shown in Patent Document 2, the image processing unit 108 uses the observer information and the stripe image data identified by the observation condition input unit 110 to calculate an appropriate barrier / stripe position, and obtains the barrier stripe data. Generate. The image processing unit 108 generates barrier stripe data by calculating a barrier stripe having an optimum width and position for blocking the right eye image R from the left eye 102 and the left eye image L from the right eye 101 on the image screen. The barrier driving circuit 106 outputs a voltage signal necessary for each display cell of the light shielding display unit 103 according to the barrier stripe data, and forms a barrier stripe on the light shielding screen.

  The electrode arrangement in the electrophoretic display device as the light-shielding display unit 103 may be a stripe arrangement or a matrix arrangement. Since the electrophoretic display device having these electrode arrangements can control the width, position, and pitch of the barrier stripe by voltage signals, it can respond to changes in the observer's viewpoint position by changing the stripe width and stripe shape. .

Second Embodiment
FIG. 3 is an explanatory diagram of the configuration of the stereoscopic image display apparatus according to the second embodiment. In the stereoscopic image display device 100 of the first embodiment shown in FIG. 1, the light shielding display unit 103 is arranged in the front and the image display unit 104 is arranged in the rear. However, in the stereoscopic image display device 200 of the second embodiment, The image display unit 204 is disposed in the front, and the light shielding display unit 203 is disposed in the rear. Since the configuration other than this is the same as that of the first embodiment, the configuration common to FIG.

  As shown in FIG. 3, the image display unit 204 is a transmissive liquid crystal display device driven by TFTs, and is controlled by the display driving circuit 107 to display a vertically elongated striped left eye image L and right eye image R. Are alternately arranged and output on the image screen. The rear light-shielding display unit 203 is a transmissive electrophoretic display device, and is arranged at a predetermined interval from the image display unit 204 by spacers 211 to form a vertically striped barrier pattern from the backlight 105. To block the illumination light.

  The barrier pattern blocks the illumination light of the right eye image R incident on the left eye 102 and transmits the illumination light of the right eye image R incident on the right eye 101. Further, the illumination light of the left eye image L incident on the right eye 101 is blocked, and the illumination light of the left eye image L incident on the left eye 102 is transmitted. The height of the spacer 211 matches the pitch of the right-eye image R and the left-eye image L so that the parallax angle between the right eye 101 and the left eye 102 forms a shift in the visual field range formed on the exit side of the barrier stripe.

  Illumination light from the backlight 105 is selectively shielded in advance by the light shielding display unit 203, and the right eye observation image R and the left eye observation image L are displayed in predetermined areas, respectively. Only the illumination light corresponding to each is incident. That is, only the right eye observation image R is displayed on the right eye 101 of the observer, and only the left eye observation image L is displayed on the left eye 102. Thus, the observer can recognize the stereoscopic image.

  Note that a reflective surface is arranged behind the light-shielding display unit 203 of the stereoscopic image display apparatus 200 of the second embodiment, or the electrode surface of the display cell of the light-shielding display unit 203 is formed on the reflective surface, so that the reflective type A stereoscopic image display device can be configured. The reflection type stereoscopic image display apparatus illuminates the image display unit 204 by reflecting external light incident from the front side on the reflection surface, and thus the backlight 105 is unnecessary.

  In addition, a semi-transmissive stereoscopic image display device can be configured by partially providing a reflective surface, leaving a transmissive portion, and also using illumination by the backlight 105. Reflective and transflective 3D image display devices can display images with brightness proportional to the intensity of external light, so that the brightness is comparable to the background even in bright usage environments that cannot catch up with backlights, such as in direct sunlight. It is possible to output a stereoscopic image that is easy to see. Needless to say, in the case of a reflective stereoscopic image display device that does not require the backlight 105, the power consumption of the backlight 105 is unnecessary.

  As described above, since the electrophoretic display device is used for the light-shielding display unit 203, there is no loss of illumination light due to the polarizing plate as in Patent Documents 1 and 2 in which the light-shielding pattern is formed by the liquid crystal display device. Accordingly, the transmittance of the light transmission part of the parallax barrier is substantially doubled or higher, and a bright stereoscopic image can be displayed.

  This effect can be confirmed in any of the stereoscopic image display devices that use the light-shielding display portion as an opening pattern for controlling the directivity of light from the parallax barrier or the backlight. By using an electrophoretic display element as the light-shielding display portion, the aperture ratio of the light-shielding display portion is improved, and a bright stereoscopic image display device can be provided.

<Third Embodiment>
FIG. 4 is an explanatory diagram of a configuration of the stereoscopic image display apparatus according to the third embodiment. The stereoscopic image display device 300 according to the third embodiment uses an in-plane type electrophoretic display device as a spatial light modulation element of the light shielding display unit 303. However, since the other configuration is the same as that of the stereoscopic image display apparatus 100 of the first embodiment, the same reference numerals are given to the configurations common to FIG. 1 and the detailed description is omitted. In the in-plane type electrophoretic display device, the dispersion liquid 4 filled in the moving space 9 is transparent, and the amount of light transmitted through the moving space 9 is modulated by the change in the horizontal plane direction of the distribution of the charged particles 3.

  As illustrated in FIG. 4, in the stereoscopic image display device 300 according to the third embodiment, a light-shielding display unit 303 is disposed in front of the image display unit 304, and a backlight 305 is disposed behind the image display unit 304. The image display unit 304 alternately displays the striped right-eye image R and left-eye image L on the image screen. The light shielding display unit 303 displays on the light shielding screen a barrier stripe that blocks the right eye image R from the left eye 102 and simultaneously blocks the left eye image L from the right eye 101. In FIG. 4, the distance between the right eye 101 and the left eye 102 and the stereoscopic image display device 300 is exaggerated shortly, and the display cell 10 of the light-shielding display unit 303 is greatly exaggerated at the expense of geometric accuracy related to blocking. Show.

  The image display unit 304 secures a necessary distance from the light shielding display unit 303 by a transparent spacer 311. The image display unit 304 is a transmissive liquid crystal display device configured by sandwiching a liquid crystal layer between a pair of polarizing plates (not shown). Then, the specific polarization component transmitted through the entrance-side polarizing plate in the illumination light of the backlight 305 is controlled in the amount of sub-refraction by the liquid crystal layer, and the transmittance of the exit-side polarizing plate is adjusted. Depending on the strength of the electric field for each display cell (pixel) applied to the liquid crystal layer, the amount of light transmitted through the polarizing plate on the exit side, that is, the luminance of the pixel changes. The display principle and driving method of the two-dimensional image on the image screen, the display principle and driving method of the three-dimensional image, and the switching control between the two-dimensional image display and the three-dimensional image display are as described in the first embodiment.

  The light-shielding display unit 303 is configured by arranging striped display cells 10 in the horizontal direction in the drawing with a width equal to the line width of the barrier stripe. The display cells 10 of the electrophoretic display device alternately display transmissive / shaded to form barrier stripes.

  In the display cell 10, a partition wall 7 is disposed between the front substrate 2 and the rear substrate 6 to partition the moving space 9 for each display cell 10. The moving space 9 is filled with a dispersion liquid 4 in which black charged particles 3 are dispersed. The display electrode 5 occupying the ceiling surface of the display cell 10 is disposed on the front substrate 2, and the partition wall electrode 1 insulated from the display electrode 5 and connected in common to all display cells is formed on the standing surface of the partition wall 7. Has been placed. The display driving circuit 107 moves the charged particles 3 between the display electrode 5 and the partition electrode 1 by applying a positive potential / negative potential to the display electrode 5 with the partition electrode 1 as a ground potential.

  Hereinafter, a driving method of the light-shielding display unit 303 which is a spatial light modulation element using the electrophoretic display device will be described in more detail with reference to FIG. The light-shielding display unit 303 is an example of an in-plane type electrophoretic display device. Light is shielded when the charged particles 3 are attached to the display electrode 3, and light is transmitted when attached to the partition wall electrode 1. In the third embodiment, the charged polarity of the charged particles 3 is positive, but the charged polarity of the charged particles 3 may be negative, and in that case, it is only necessary to reverse the polarity of the applied voltage shown below.

  The light shielding display unit 303 is divided by the partition wall electrode 1 and the partition wall 7 at a predetermined interval. The display electrode (pixel electrode) 5 is a transparent electrode such as ITO. The partition electrode (common electrode) 1 is always kept at a common potential of 0V.

  When forming the light shielding part, a predetermined negative voltage is applied to the display electrode (pixel electrode) 5. Since the charged polarity of the charged particles 3 is positive, the charged particles 3 are attracted to the front substrate 2 side to form a black coating film that covers the display electrode 5 and a light shielding portion is formed.

  On the other hand, when forming the light transmission part, a predetermined positive voltage is applied to the display electrode (pixel electrode) 5. Since the charged polarity of the charged particles 3 is negative, the charged particles 3 are attracted to the partition wall electrode (common electrode) 1 and the partition wall 7 side, the black coating film covering the display electrode 5 disappears, and the light transmission portion Is formed.

  As in the first embodiment, the image display unit 304 may be any of a transmissive display, a transflective display, and a reflective display. However, when the image display unit 304 is of a reflective type, the backlight 305 in FIG. 4 is unnecessary, and display is performed by reflecting external light incident from the front.

  Further, as described in the second embodiment, the opposite combinations of the front-rear positional relationship between the image display unit 304 and the light-shielding display unit 303 are possible. That is, a configuration in which the light-shielding display unit 303 is disposed in front of the image display unit 304 and only the necessary parallax images are detected by the left eye 102 and the right eye 101 by blocking the illumination light (backlight 305) by the light-shielding display unit 303. It is good.

  The light-shielding display unit 303 which is an in-plane type electrophoretic display device can display barrier stripes with a much higher contrast than a liquid crystal device. This is because black charged particles that do not require a polarizing plate for forming contrast, use dispersion liquid 4 that has a much higher transmittance than liquid crystal, and can provide complete light shielding by laminating two to three layers. This is because 3 is used. This is because a transmittance of nearly 100% through the dispersion liquid 4 is obtained in the transmissive state, and a light shielding rate of nearly 100% by the charged particles 3 is obtained in the light-shielded state. Therefore, when an in-plane type electrophoretic display element is used as the light-shielding display unit 303, the transmission of the light transmission unit of the parallax, barrier, and stripe is compared to that using the liquid crystal display device of Patent Documents 1 and 2. The rate increases, and a brighter stereoscopic image display device can be realized.

  The stereoscopic image display apparatus 300 according to the third embodiment divides each of a plurality of parallax images from the parallax image source 109 having parallax image information into stripe pixels, and arranges some of the plurality of stripe pixels in a predetermined order. Then, one stripe image is synthesized and displayed on the image display unit 304. Further, a barrier stripe composed of a light transmitting portion and a light shielding portion having a predetermined pitch is displayed on the light shielding display portion 304 provided at a predetermined position in front of or behind the image display portion 304. Then, the stereoscopic image is obtained by causing the stripe images corresponding to the left and right eyes to enter the left and right eyes of the observer, respectively, by the barrier stripe. Then, as the light-shielding display portion 303, a voltage is applied to the rear substrate 6 and the front substrate 2, which are a pair of transparent substrates opposed to each other, the dispersion liquid 4 and the charged particles 3 filled in the moving space 9, and A display electrode 5 and a partition wall electrode 1 that form an electric field in the moving space 9 are provided. The display electrode 5 and the partition wall electrode 1 are insulated from each other.

  In particular, the dispersion liquid 4 filled in the moving space 9 of the electrophoretic display device is highly transparent, and the distribution of the charged particles 3 in the display cell 10 changes in the horizontal plane direction. Modulates the amount of transmitted light.

<Modification of Third Embodiment>
FIG. 5 is an explanatory diagram of a configuration of a stereoscopic image display apparatus according to a modification of the third embodiment, and FIG. 6 is an explanatory diagram of a configuration of a stereoscopic image display apparatus according to another modification of the third embodiment. 5 and 6, the same reference numerals are given to the same components as those in FIG. 4, and detailed description thereof will be omitted.

  As shown in FIG. 5, the image display unit 304 that alternately displays the stripe image for the right eye and the stripe image for the left eye and the light-shielding display unit 303 that displays the barrier stripe are both in-plane type. This is an electrophoretic display device. The spacer 311 shown in FIG. 4 is divided into two and replaced with a spacer 311B that also serves as a transparent substrate, and an image display unit 304 and a light-shielding display unit 303 having the same pixel structure are formed on the spacer 311B. .

  In the spacer 311B, a thin film transistor (TFT) that drives the display cell 10, a transparent display electrode for each display cell 10 connected to the thin film transistor, and a partition wall 7 that partitions the moving space 9 are formed. Then, after filling the moving space 9 with the dispersion liquid 4 in which the charged particles 3 are dispersed, the transparent substrate 2B is overlaid on the partition wall 7, and the moving space 9 is sealed. Thereafter, the spacer 311B of the image display unit 304 and the spacer 311B of the light-shielding display unit 303 are brought into close contact with each other to form the stereoscopic image display device 300B.

  Further, a whitened reflecting surface 9 is formed on the transparent substrate 2B of the image display unit 304, and illumination light necessary for image display is secured by external light incident from the light shielding display unit 303 side. The image screen of the image display unit 304 is the surface position of the display electrode 5, and the light-shielding screen of the light-shielding display unit 303 is the surface position of the display electrode 5, and the difference in visual field between the left eye and the right eye due to the barrier stripe by the two spacers 311B. The middle broken line) is matched with the width of the stripe image. To be precise, the thickness of the two spacers 311B is determined so as to be so.

  In the stereoscopic image display device 300B according to the modified example, since the light-shielding display unit 303 displays the barrier stripe by pixel display, the line width and position of the barrier stripe can be adjusted in units of pixel width. Since both the image display unit 304 and the light-shielding display unit 303 are in-plane type electrophoretic display devices using a highly transparent dispersion liquid 4, there is no polarizing plate. The loss of light is less than when a liquid crystal display device is used. In addition, although there is a difference between the reflective type and the transmissive type, the image display unit 304 and the light-shielding display unit 303 have a common pixel configuration. Therefore, the design of the display cell 10, the drive circuit including the driver, the manufacturing process, and the manufacturing apparatus are shared. Can be

  As shown in FIG. 6, in a stereoscopic image display device 300 </ b> C according to another modification of the third embodiment, the image display unit 304 is configured by a liquid crystal display device, and in-plane electrophoresis of the light-shielding display unit 303 is performed. A polarizing plate 8 is disposed on the front substrate 2 of the display device. By disposing the polarizing plate 8, which is essential for the image display unit 304, on the front substrate 2, it is not necessary to dispose the polarizing plate 8 between the image display unit 304 and the light shielding display unit 303. In this way, the rear substrate 6 and the spacer 311 of the light shielding display unit 303 and the upper substrate of the liquid crystal display device of the image display unit 304 can be integrated into a common member. This has the effect of reducing the number of substrates necessary for the configuration of the stereoscopic image display apparatus 300C.

<Fourth embodiment>
FIG. 7 is an explanatory diagram of an image display unit in the stereoscopic image display apparatus according to the fourth embodiment. The stereoscopic image display device according to the fourth embodiment is configured such that the image display unit 304 in the stereoscopic image display device 300 according to the third embodiment is configured by a reflective μ capsule type electrophoretic display device and the backlight 305 is removed. is there. Since the other configuration is the same as that of the third embodiment, the description will be given exclusively with reference to FIG. 4, and one display cell 20 of the image display unit 304 is shown in FIG.

As illustrated in FIG. 4, the stereoscopic image display apparatus according to the fourth embodiment uses an in-plane type electrophoretic display element as the light-shielding display unit 303. The image display unit 304 uses a μ capsule type electrophoretic display device in which only one pixel is shown in cross section in FIG. This will be described in detail below.

  In the display cell 20 of the μ capsule type electrophoretic display device, the insulating dispersion liquid 23 is filled in the μ capsule-shaped partition wall 5, and the black charged particles 24 having the opposite electrical polarities in the dispersion liquid 23. And white charged particles 29 are dispersed. A front electrode is disposed in front of the μ capsule-shaped partition wall 5 via an insulating layer 28, and a rear electrode 21 serving also as a reflective surface is disposed behind the μ capsule-shaped partition wall 5 through an insulating layer 27. is doing. The transparent front electrode 22 is integrally formed so as to cover all the display cells, and the rear electrode 21 also serving as a reflection surface is divided for each display cell 20. Since the image display unit 304 is a reflective μ capsule type electrophoretic display device, the backlight 305 is unnecessary. Instead, external light incident from the front is reflected by the rear electrode 21 to ensure the brightness of the stereoscopic image and the planar image according to the necessary illumination light quantity in the image display unit 304, that is, the brightness of the environment.

  The μ capsule type partition wall 5 has a shell-like shape that is integrally arranged not only in the normal direction of the front substrate 30 and the rear substrate 31 but also along the surfaces of the front substrate 30 and the rear substrate 31. The μ capsule-shaped partition wall 25, the front substrate 30, the front electrode 22, and the insulating layer 28 are made of a transparent material. A transparent resin binder 26 is filled in the gap between the front substrate 30 and the rear substrate 31 and the μ capsule-shaped partition wall 25. After pressing and flattening the μ capsule-shaped partition wall 25 with the front substrate 30 and the rear substrate 31, the resin binder 26 is cured to fix the flat shape. As the resin binder 26, an ultraviolet curable resin, a thermosetting resin, or the like is used.

  The number of such μ capsule-shaped partition walls 25 in the display cells (pixels) 20 may not be one, but a plurality may be arranged. That is, a plurality of μ capsule-shaped partition walls 25 may be arranged on one rear electrode 21 divided and arranged for each display cell 20.

  In addition, after the resin binder 26 is solidified in a plate shape parallel to the insulating layers 27 and 28 to form a substrate, necessary electrode layers and insulating layers may be laminated (attached) on the front and back of the resin binder 26 substrate surface. . Thereby, the front substrate 30 and the rear substrate 31 may be unnecessary. When laminating electrodes, a low-temperature process that does not require vacuum treatment, such as printing of an organic conductor film, is desirable.

  Next, a method for driving the display cell 20 will be described. The black charged particles 24 are positively charged, and the white charged particles 29 are negatively charged. The display drive circuit 107 shown in FIG. 4 applies the positive or negative voltage to the rear electrode 21 of each display cell 20 with the front electrode 22 as a common ground potential.

  As shown in FIG. 7, when a sufficient positive voltage is applied to the rear electrode 21, the front electrode 22 becomes a relative negative polarity and attracts the black charged particles 24. Thereby, the display cell 20 viewed from the front substrate 30 side is displayed in black by the black charged particles 24. On the other hand, when a sufficient negative voltage is applied to the rear electrode 21 of the display cell 20, the front electrode 22 becomes a relative positive polarity and attracts the white charged particles 29. Thereby, the display cell 20 viewed from the front substrate 30 side is displayed in white by the white charged particles 29. In this way, the display cell 20 can display white and black in two gradations. In addition, after resetting to the display of either white or black, a voltage having a polarity opposite to that at the time of resetting is applied to the rear electrode 21, and at least one of the applied voltage and the application time at this time is controlled, so that an intermediate gradation is obtained. Gray scale display is also possible.

  Since the stereoscopic image display device of the fourth embodiment employs an electrophoretic display device for both the image display unit 304 and the light shielding display unit 303, a polarizing plate is used for both the image display unit 304 and the light shielding display unit 303. Is unnecessary. Therefore, it is possible to display a bright three-dimensional image using illumination light more effectively than in the third embodiment using a liquid crystal display device for the image display unit 304, and even the illumination that relies on external light as a reflection type loses the background. 3D images with no practical brightness can be displayed.

  The image display unit 304 includes various electrophoretic display devices other than the μ capsule type, for example, an in-plane type provided with a partition electrode, and an electrophoresis that moves charged particles between two large and small electrodes arranged on the same plane. A display device or the like may be employed.

<Fifth Embodiment>
FIG. 8 is an explanatory diagram of a configuration of the stereoscopic image display apparatus according to the fifth embodiment. The stereoscopic image display device 500 of the fifth embodiment employs an electrophoretic display device for both the image display unit 504 and the light-shielding display unit 503, and the movement spaces of the two are communicated to be integrally formed. Since the configuration other than this is the same as that of the stereoscopic image display apparatus 300 of the third embodiment, the configuration common to FIG.

  As shown in FIG. 8, a stereoscopic image display apparatus 500 according to the fifth embodiment includes a light-shielding display unit 504 that displays barrier stripes, and an image display unit that alternately displays right-eye images and left-eye images in stripes. Both 504 and 504 consist of electrophoretic display devices. A moving space 49 for the charged particles 43 in the two electrophoretic display devices is integrally formed. The front substrate 42 and the rear substrate 46 are set and held at a predetermined interval by a spacer (not shown) arranged so as to be orthogonal to the direction of the barrier stripe.

  The light-shielding display unit 503 is configured in common except for a part of the light-shielding display unit 303 of the third embodiment, and is similarly controlled to display the same barrier stripe on the light-shielding screen (the plane of the display electrode 45). That is, in the stereoscopic mode, the barrier driving circuit 106 controls the voltage applied to the display electrode 45 to remove the charged particles 43 from the display electrode 45, and the light-shielding region where the display electrode 45 is covered with the charged particles 43. Are alternately formed to display the barrier stripe on the light shielding screen. On the other hand, in the plan view mode, the charged particles are collected in the partition wall 47, the charged particles 42 are removed from the display electrode 45, the barrier stripes are eliminated, and the light-shielding display portion 503 is set in the full transmission state.

  Hereinafter, a driving method of the image display unit 504 of the stereoscopic image display device 500 using two integrated electrophoretic display devices will be described. Here, the charged polarity of the charged particles 43 is positive, but the charged polarity of the charged particles 43 may be negative. In this case, all the applied voltages shown below may be reversed.

  One pixel of the image display unit 504 includes a first electrode 55 and a second electrode 51 that are insulated from each other. When one pixel is desired to have the same color as the charged particles 43, a negative voltage is applied to the first electrode 55 having a large electrode area when viewed from the observer so that the first electrode 55 is covered with the charged particles 43. A positive voltage may be applied to the narrow second electrode 51.

  When the same pixel is desired to have the same color as that of the rear substrate 46 or the first electrode 55, a positive voltage is applied to the first electrode 55 having a large electrode area as viewed from the observer to discharge the charged particles 43 and the observer sees it. Thus, a minus voltage may be applied to the second electrode 51 having a small electrode area. Thereby, display of two colors and two gradations is possible. In order to display an intermediate gradation state between two gradations, an intermediate voltage for displaying two gradations may be applied between the first electrode 55 and the second electrode 51. Accordingly, the image display unit 504 using the electrophoretic display device can be driven to display the right-eye image and the left-eye image. By combining with the light-shielding display unit 503, a stereoscopic image display device can be realized.

  As described above, since the stereoscopic image display apparatus 500 according to the fifth embodiment uses an electrophoretic display apparatus for the light-shielding display unit 503, the stereoscopic image display apparatus 500 uses the liquid crystal display apparatus disclosed in Patent Documents 1 and 2. In comparison, the loss when illumination light passes through the polarizing plate is significantly less. Accordingly, the transmittance of the light transmission part of the parallax barrier stripe is remarkably increased, and a bright stereoscopic image can be displayed.

  In addition, since the image display unit 503 also uses an electrophoretic display device, there is no loss when the illumination light passes through the polarizing plate as compared with the stereoscopic image display device using the liquid crystal display device of Patent Document 2. Therefore, the brightness of both the right-eye image and the left-eye image of the image display unit 503 is increased, and a brighter stereoscopic image display device can be realized.

  Further, the image display unit 504 is an electrophoretic display device, and the image display unit 504 and the light shielding display unit 503 are integrally formed. As a result, the number of parts was reduced, the number of processes was reduced, and the production cost and production time were shortened. That is, by integrally forming the image display unit 504 and the light-shielding display unit 503, it is possible to reduce the production cost and the production time of the stereoscopic image display device 500.

<Sixth Embodiment>
FIG. 9 is an explanatory diagram of the display state of the right-eye image in the stereoscopic image display apparatus according to the sixth embodiment, and FIG. 10 is an explanatory diagram of the display state of the left-eye image. 9 and 10 show the same stereoscopic image display device 600. FIG. 7 shows the case where the right-eye image is displayed on the image display unit 604, and FIG. 8 shows the case where the left-eye image is displayed. The stereoscopic image display apparatus 600 according to the sixth embodiment alternately displays the right-eye image and the left-eye image at the same stripe position on the image display unit 604 at high speed, and switches the light-shielding display unit 603 including the electrophoretic display device. Open and close at high speed. This allows the observer to recognize the stereoscopic image so that the right-eye image only enters the right eye and the left-eye image only enters the left eye. Since the configuration other than the image switching and the barrier / striping switching is the same as that of the first embodiment, the same reference numerals are given to the same configurations as those in FIG. 1 and the detailed description is omitted.

  Hereinafter, the stereoscopic image display principle in the sixth embodiment will be described in more detail with reference to FIGS. 9 and 10. In the stereoscopic image display device 600, a light shielding display unit 603 is arranged in front of the image display unit 604. The spacer 611 matches the shift of the viewing range formed by the parallax angle between the right eye 101 and the left eye 102 on the exit side of the barrier stripe with the pitch of the right eye image (left eye image).

  The image processing unit 608 uses the parallax image information included in the parallax image source 109 to form the right-eye image data Rs and the left-eye image data Ls. Then, stripe image data based on the right-eye image data Rs and stripe image data based on the left-eye image data Ls are generated. The display driving circuit 107 uses the two stripe image data to drive the image display unit 604 in a time-sharing manner, and alternately outputs the left-eye image and the right-eye image in a vertically long stripe shape at the same position on the image screen.

  The image processing unit 608 calculates an appropriate barrier / strip position and generates barrier stripe data corresponding to the switching display between the left-eye image and the right-eye image. The image processing unit 608 generates barrier stripe data by calculating a barrier stripe having an optimum width and position for blocking the right-eye image from the left eye 102 and the left-eye image from the right eye 101 on the image screen. The barrier driving circuit 106 outputs a voltage signal necessary for each display cell of the light shielding display unit 603 according to the barrier stripe data, and forms a barrier stripe on the light shielding screen.

  The light-shielding display unit 603 uses a transmissive electrophoretic display device as a spatial light modulation element, and is controlled by the barrier driving circuit 106 to synchronize with the switching between the right-eye image and the left-eye image in the image display unit 604. Then, the barrier stripe position is switched between two ways.

  The image display unit 604 is controlled by the display drive circuit to alternately and rapidly display the right-eye image and the left-eye image displayed on the image screen. The switching display is performed at 60 fps, for example. That is, as shown in FIG. 7, after the image for the right eye is displayed for 1/60 seconds, the image for the left eye is displayed for 1/60 seconds by occupying the same stripe position as shown in FIG. The

  At this time, the light shielding display unit 603 performs selective shielding in synchronization with the timing at which an image is displayed on the image display unit 604. As shown in FIG. 9, during the period in which the image for the right eye is displayed on the image display unit 604, a part of the illumination light from the backlight 105 is displayed on the light shielding area of the barrier stripe displayed on the light shielding display unit 604. Is shielded by. Therefore, the image for the right eye does not reach the left eye and enters only the right eye.

  On the other hand, as shown in FIG. 10, during the period when the image for the left eye is displayed on the image display unit 604, part of the illumination light from the backlight 105 is the barrier stripe displayed on the light shielding display unit 604. It is shielded by the light shielding area. Therefore, the image for the left eye does not reach the right eye and enters only the left eye. In this way, the right-eye image and the left-eye image occupy the same stripe position and are alternately displayed at high speed, and the right-eye image reaches only the right eye, and the left-eye image reaches only the left eye. Thus, the observer can recognize the stereoscopic image.

  Next, the principle of displaying a two-dimensional image according to this embodiment will be described. The two-dimensional image display principle of the present embodiment is the same as that of the first embodiment. A two-dimensional image is displayed on the display, and the entire area of the image display area is colorless and transparent without forming a barrier stripe on the spatial light modulator. To do. Thus, a normal two-dimensional image can be displayed.

  The observation condition input unit 110 inputs information such as the position information of the observer and the display area of a stereoscopic image displayed on the image display unit 604. As a result, when the distance between the observer and the stereoscopic image display device 600 changes, when the viewing angle of the observer changes, it is possible to deal with another observer or the like with a different binocular interval. The observation condition input unit 110 may be replaced with a monitor device that automatically detects the viewpoint position of the observer.

  As described above, the image processing unit 608 sends an instruction to display the parallax image for the right eye on the image display unit 604 to the display driving circuit 107, and at the same time, to the barrier driving circuit 106, the left eye Send an instruction to block the image that reaches. The barrier driving circuit 106 forms a parallax barrier stripe on the light shielding screen of the light shielding display unit 603 in accordance with the instruction, and the display driving circuit 107 causes the image display unit 604 to display a parallax image for the right eye. As described above, the display driving circuit 107 and the barrier driving circuit 106 are synchronized, so that an image is displayed only to the right eye during a period in which a parallax image for the right eye is displayed.

  As described above, the image processing unit 608 sends an instruction to display the parallax image for the left eye on the image display unit 604 to the display driving circuit 107, and at the same time, the barrier driving circuit 106 has the right eye. Send an instruction to block the incoming image. The barrier driving circuit 106 forms a parallax barrier stripe on the light shielding screen of the light shielding display unit 603 in accordance with the instruction, and the display driving circuit 107 causes the image display unit 604 to display a parallax image for the left eye. As described above, the display driving circuit 107 and the barrier driving circuit 106 are synchronized, so that an image is displayed only to the left eye during a period in which a parallax image for the left eye is displayed.

  As described above, in the stereoscopic image display device 600 according to the sixth embodiment, the electrophoretic display device is used as the light shielding display unit 603. Therefore, as compared with the stereoscopic image display device using the liquid crystal display device of Patent Documents 1 and 2, there is no loss of illumination light due to the polarizing plate, so the transmittance of the light transmission part of the parallax barrier stripe is extremely high. Thus, a bright stereoscopic image can be displayed.

  In the stereoscopic image display device 600 of the sixth embodiment, the light shielding display unit 603 is arranged behind the image display unit 604 so that the relationship between the first embodiment and the second embodiment is the same. The illumination light from the light 105 may be selectively blocked. Thus, as described above, control can be performed so that only the respective parallax images are detected by the right eye 101 and the left eye 102.

<Stereoscopic image display device of comparative example>
Non-Patent Document 1 discloses the basic technique of the stereoscopic image display method described in the above embodiment. In this method, each of a plurality of parallax images is divided into stripe pixels, and stripe images forming left and right parallax images are alternately arranged on one screen to form and display a stripe image. Then, the left and right eyes of the observer pass through each slit through a slit (called a parallax barrier) having a predetermined light transmitting portion provided at a predetermined distance from the stripe image. A stereoscopic view is obtained by observing the corresponding parallax image.

  Further, in order to enable such a device to be used as a two-dimensional image display device such as an ordinary television, in Patent Document 1 and Patent Document 2, a parallax barrier is formed by a transmissive liquid crystal display device or the like. Electronically controlled. Electronic control optimizes stereoscopic vision by changing the shape and position of the parallax barrier in accordance with various situations.

  FIG. 11 is an explanatory diagram of a configuration of a stereoscopic image display apparatus of a comparative example, and shows an outline of a main part of the stereoscopic image display apparatus disclosed in Patent Document 1. As shown in FIG. 11, in the stereoscopic image display device 700 of the comparative example, an electronic parallax barrier 703 is disposed on the image display surface 701 through a spacer 702 having a thickness d. A transmissive liquid crystal display device is used for the electronic parallax barrier 703, and the spacer 702 is made of transparent glass or transparent acrylic.

  The image display surface 701 is configured by dividing a plurality of parallax images taken from two or multiple directions into vertical stripe pixels, and alternately arranging the stripe images of the plurality of parallax images in a predetermined order. Display as a stripe image. On the other hand, for the electronic parallax barrier 703, an XY address is designated by a control means such as the microcomputer 704. Thereby, a vertically long barrier stripe is formed at an arbitrary position on the display surface of the electronic parallax barrier 703 to enable stereoscopic viewing according to the principle of the parallax barrier method.

  In the stereoscopic image display device 700 according to the comparative example, when displaying a two-dimensional image (non-stereoscopic image), a barrier stripe is not formed on the electronic parallax barrier 703, and the entire area of the image display area is colorless and transparent. A two-dimensional image display is performed by setting a simple state. This realizes compatibility with the normal two-dimensional image display that cannot be achieved by the conventional stereoscopic image display method using the parallax barrier method, and switching display between the panoramagram and the stereogram.

  FIG. 12 is an explanatory diagram of a configuration of a stereoscopic image display device of another comparative example, and shows an outline of a main part of a stereoscopic image display device configured by a liquid crystal panel display and an electronic barrier disclosed in Patent Document 2. . As shown in FIG. 12, in a stereoscopic image display device 800 of another comparative example, a light-shielding display unit 801 as an electronic barrier forming unit is disposed in front of an image display unit 802 as an image display unit. The spacer 820 sets a predetermined interval between the image screen of the image display unit 802 and the light shielding screen of the light shielding display unit 801. Each of the image display portion 802 and the light-shielding display portion 801 is a liquid crystal display device. For the liquid crystal layer 818 of the image display portion 802, the polarizing plates 805 and 806 and the liquid crystal layer 817 of the light-shielding display portion 801 are used. In this case, polarizing plates 803 and 804 are arranged.

  Also in the stereoscopic image display device 800, the formation of barrier stripes using the liquid crystal layer 817 is stopped when performing two-dimensional image display. Then, two-dimensional image display is performed by making the entire area of the image display area colorless and transparent, thereby realizing compatibility with a normal two-dimensional image display device.

  However, in the stereoscopic image display device 800, four polarizing plates 803, 804, 805, and 806 are used, and the number of polarizing plates is two more than a normal liquid crystal display using two polarizing plates. In principle, it is possible to delete one of the four polarizing plates 803, 804, 805, and 806, but even in this case, the number of polarizing plates is one more than that of a normal liquid crystal display.

  When displaying a two-dimensional image by the stereoscopic image display devices 700 and 800 of comparative examples using a transmission type liquid crystal display device as an electronic parallax barrier, a parallax stripe is formed on the electronic parallax barrier. Do not form. And although it is trying to make it a colorless and transparent state over the whole image display area, since the liquid crystal display device uses a polarizing plate, there existed a problem that the brightness | luminance of a three-dimensional image display device fell.

  Further, when a stereoscopic image is displayed by the stereoscopic image display devices 700 and 800 of the comparative example using a transmissive liquid crystal display device as the electronic parallax barrier, an arbitrary on the light shielding screen of the electronic parallax barrier is used. A vertically long barrier stripe having a light transmission part and a light shielding part is formed at the position. However, similarly, since the liquid crystal display device uses a polarizing plate, there is a problem in that the luminance also decreases in the light transmission portion.

  On the other hand, the stereoscopic image display device of each embodiment described above is a stereoscopic image display device that uses the light-shielding display unit as an opening pattern for controlling the directivity of light from the parallax barrier or the backlight. However, no polarizing plate is required for the light-shielding display portion. Therefore, it is possible to provide a bright stereoscopic image display device that does not cause a decrease in luminance of the image display unit. Further, the number of parts is reduced as compared with the liquid crystal display device, so that the production cost and the production time of the stereoscopic image display device can be reduced.

<Correspondence with Invention>
A stereoscopic image display apparatus 300 according to the third embodiment includes an image display unit 304 that can display a right-eye image and a left-eye image on an image screen. Then, a light-shielding display unit 303 is provided that can display a barrier stripe that restricts observation of the right-eye image by the left eye 102 and restricts observation of the left-eye image by the right eye 101 on a light-shielding screen at a distance from the image screen. The light-shielding display unit 303 includes the charged particles 3 filled in the moving space 9 arranged on the light-shielding screen, and the partition wall electrode 1 that forms an electric field in the moving space 9 and forms barrier stripes by the charged particles 3 on the light-shielding screen. , Display electrode 5 and barrier drive circuit 106.

  Therefore, the charged particles 3 directly control the light shielding / transmission, thereby forming a barrier stripe having a high contrast on the light shielding screen without a polarizing plate. Therefore, compared to the case where a liquid crystal device is used for the light-shielding display portion 303, a stereoscopic image that is substantially twice or more bright can be displayed because there is no loss of transmitted light due to the polarizing plate.

  In the stereoscopic image display device according to the fourth embodiment, the image display unit 304 forms an electric field in the μ capsule type moving space and the charged particles 24 and 29 filled in the μ capsule type moving space arranged on the image screen. In addition, a front electrode 22, a rear electrode 21, and a display driving circuit 107 that form observation images by the charged particles 24 and 29 on the image screen are provided.

  In the stereoscopic image display apparatus 200 of the second embodiment, the image display unit 204 is disposed on the front side as a transmission type, and the light shielding display unit 203 is provided between the backlight 105 that transmits and illuminates the image display unit 204 and the image display unit 204. Is arranged.

  The stereoscopic image display apparatus according to the fourth embodiment is configured such that, of the image display unit 304 and the light-shielding display unit 303, the light-shielding display unit 303 disposed on the front side is a transmission type, and the image display unit 304 disposed on the rear side is used. A rear electrode 21 also serving as a reflective surface is provided to provide a reflective type.

  A stereoscopic image display apparatus 500 according to the fifth embodiment includes a front substrate 42 disposed on the observation side and a rear substrate 46 disposed opposite to the front substrate 42, and the moving space 49 communicates integrally with the front substrate 42. And the rear substrate 46.

  The stereoscopic image display apparatus 300 according to the third embodiment includes a large number of display electrodes 5 that are arranged in a plane on a light-shielding screen and can individually apply voltage signals, and an electric field corresponding to the voltage signals between the display electrodes 5. And the partition wall electrode 1 for moving the charged particles 3.

  The stereoscopic image display apparatus 300 according to the third embodiment includes a partition wall 7 that partitions the moving space 9 for each display electrode 5, and the partition electrode 1 is disposed on the standing surface of the partition wall 7.

  In the stereoscopic image display apparatus 300 of the third embodiment, the charged particles 3 are dispersed in a transparent dispersion liquid filled in the moving space 9.

It is explanatory drawing of the stereo image display in the stereo image display apparatus of 1st Embodiment. It is explanatory drawing of a planar image display. It is explanatory drawing of the structure of the three-dimensional image display apparatus of 2nd Embodiment. It is explanatory drawing of a structure of the three-dimensional image display apparatus of 3rd Embodiment. It is explanatory drawing of a structure of the stereo image display apparatus of the modification of 3rd Embodiment. It is explanatory drawing of a structure of the stereo image display apparatus of another modification of 3rd Embodiment. It is explanatory drawing of the image display part in the three-dimensional image display apparatus of 4th Embodiment. It is explanatory drawing of the structure of the stereo image display apparatus of 5th Embodiment. It is explanatory drawing of the display state of the image for right eyes in the stereo image display apparatus of 6th Embodiment. It is explanatory drawing of the display state of the image for left eyes in 6th Embodiment. It is explanatory drawing of a structure of the stereoscopic image display apparatus of a comparative example. It is explanatory drawing of a structure of the stereo image display apparatus of another comparative example.

Explanation of symbols

1, 5, 106 First driving means (partition electrode, display electrode, barrier driving circuit)
21, 22, 107 Second driving means (front electrode, rear electrode, display driving circuit)
3, 24, 29, 43 Charged particles 4, 23, 44 Dispersed liquid 101 Right eye 102 Left eye 103, 203, 303, 403, 503, 603 Shading display means (shading display section)
104, 204, 304, 404, 504, 604 Image display means (image display unit)
105 Backlight 108, 608 Image processing unit 109 Parallax image source 110 Observation condition input unit

Claims (8)

Image display means capable of displaying a right-eye image and a left-eye image on an image screen;
3D, comprising: a light-shielding display unit capable of displaying a light-shielding pattern that restricts observation of the right-eye image by the left eye and restricts observation of the left-eye image by the right eye on a light-shielding screen at a distance from the image screen. In an image display device,
The light-shielding display means forms a light-shielding pattern by the charged particles on the light-shielding screen by forming an electric field in the first movement space and the charged particles filled in the first movement space arranged on the light-shielding screen. A stereoscopic image display device comprising: a first drive unit configured to:   The image display means is configured to form a charged particle filled in a second moving space arranged on the image screen, an electric field in the second moving space, and the right-eye image and the left-eye image by the charged particles. The stereoscopic image display apparatus according to claim 1, further comprising: a second driving unit configured to form an image on the image screen.   3. The image display means is disposed on the observation side as a transmissive type, and the light shielding display means is disposed between an illuminating means for transmitting and illuminating the image display means and the image display means. The stereoscopic image display device described.   Of the image display means and the light-shielding display means, the means arranged on the observation side is a transmissive type, and the means arranged on the rear side viewed from the observation side is provided with a reflection surface to be a reflection type. The stereoscopic image display apparatus according to any one of claims 1 to 3. A front substrate disposed on the observation side, and a rear substrate disposed opposite to the front substrate,
The stereoscopic image display device according to claim 2, wherein the first moving space and the second moving space are integrally communicated with each other and are arranged at an interval between the front substrate and the rear substrate.   The first driving unit forms an electric field according to the voltage signal between a plurality of display electrodes arranged in a plane on the light-shielding screen and individually capable of applying a voltage signal, and the display electrode. The stereoscopic image display device according to claim 1, further comprising a non-display electrode that moves the charged particles.   The stereoscopic image display apparatus according to claim 6, further comprising: a partition wall for partitioning the first moving space for each display electrode, wherein the non-display electrode is disposed on a rising surface of the partition wall. The three-dimensional image display device according to claim 1, wherein the charged particles are dispersed in a transparent dispersion liquid filled in the first moving space.

Images