JP4406766B2 - 3D image display device - Google Patents

Description

  The present invention relates to a three-dimensional image display device that displays a three-dimensional image by switching and displaying an image on the two-dimensional display in synchronization with the rotation angle of the rotating two-dimensional display.

  A three-dimensional image display device (sometimes referred to as a three-dimensional display device) that displays a three-dimensional image is realized in many fields such as medical treatment, chemistry (molecular structure analysis), mechanical design (CAD), advertising display, and entertainment. Is desired.

  As a result, a three-dimensional display device utilizing binocular parallax has been put into practical use. For example, a 50-inch four-view three-dimensional display device has been announced, or a mobile phone incorporating a three-dimensional display function is practical. It has become.

  Although these three-dimensional display devices using binocular parallax can display a three-dimensional image relatively easily from a flat display device, the three-dimensional viewpoint position is limited, and the observer can freely An image cannot be observed from any position.

  Therefore, a volume scanning type three-dimensional display device is known as a method by which an observer can observe a three-dimensional image from a free position, and has been put into practical use as a product.

  FIG. 12 is a diagram showing a schematic structure of this volume scanning type three-dimensional display device. The three-dimensional display device 132 includes a pedestal portion 134, a screen 136 that rotates at a high speed (730 rpm) on the pedestal portion 134, and a windshield 138 that houses the screen 136. The pedestal unit 134 incorporates an optical system constituting a projector that projects an image using a DMD (Digital Micromirror Device) on a rotating screen 136, and the projection mirror unit 140 is installed on the upper surface of the pedestal unit 134. . In this projection function, a two-dimensional cross-sectional image of a three-dimensional object (hereinafter sometimes simply referred to as a cross-sectional image) is switched to the screen 136 and projected in synchronization with the rotation angle of the screen 136.

  Here, the principle that a three-dimensional image can be displayed by the above-described volume scanning type three-dimensional display device will be described with reference to FIG. Consider displaying a certain round three-dimensional object 142 as shown in FIG. When the screen 136 is continuously rotated and the screen 136 is at a certain rotation angle, a surface cut image of the three-dimensional object 142 is considered.

  As shown in FIG. 13B, when the angle (rotation angle) is 1, the screen 136 is in a position slightly invading the three-dimensional object 142, and a surface cut image (hereinafter referred to as a sectional view) is shown in FIG. As shown in angle 1 of C), a small circle 144 is initially formed. Similarly, as the screen 136 enters the three-dimensional object 142, the size of the cross-sectional image changes, the size of the circle 144 is maximum at the angle 3 and then decreases again at the angle 5, and finally the screen 136 The user leaves the three-dimensional object 142.

  In this way, for each angle of the screen 136, the cross-sectional image of the three-dimensional object as shown in FIG. 13C is projected from the projection mirror unit 140 onto the screen 136 and displayed. At this time, if the screen 136 is rotating at a high speed, the screen 136 becomes invisible due to the integral effect of the eyes, and the displayed cross-sectional image becomes entirely visible as an afterimage. Therefore, a three-dimensional image of the three-dimensional object 142 is displayed as a set of continuous cross-sectional images. In order for this effect to appear effectively, it is desirable that the volume rewrite cycle be 30 Hz or more. (Three-dimensional image display is possible although there is flicker even below it.) Therefore, the rotation speed of the screen 136 is preferably 15 Hz or more (900 rpm).

  However, in order to display an image using a projector on the rotating screen 136, it is necessary to reflect the image to the mirror over multiple times. Therefore, in order to display the image with high accuracy, a complicated reflection system using the mirror is required to be precise. Need to make. In this case, the price of the apparatus becomes high, it is difficult to improve display accuracy in the first place, only a blurred three-dimensional image can be obtained, and furthermore, it is difficult to improve the brightness and contrast of the three-dimensional image. There is.

As one method for solving the problems of such a three-dimensional display device, a rotating self-luminous two-dimensional display (same as a two-dimensional display panel) is synchronized with the rotation angle without using a projector. There is a method of switching and directly displaying images. In this method, a three-dimensional image can be clearly displayed and display accuracy, luminance and contrast can be improved. The basic idea of such a method has become publicly known. (For example, refer to Patent Document 1).
JP-T 56-500313 (page 3-8, Fig. 1)

  However, in the conventional method of switching and displaying an image in synchronization with the rotation angle on the rotating self-luminous two-dimensional display, the following conditions are required for the self-luminous two-dimensional display. (1) When a high-speed refresh rate, for example, the volume rewriting cycle is 30 Hz and the angular resolution is 2 degrees (180 in one rotation), the rewriting cycle of one screen of the self-luminous two-dimensional display is 30 Hz × 180 = 4800 Hz. . (2) High definition, high brightness, and high contrast, which are the basic performance of a display, (3) Wide viewing angle. This means that if the viewing angle is narrow, the display image cannot be seen even if the display is viewed obliquely. Invisible as a dimensional image. (4) If the display is thin and the display is thick, an image is not displayed in that portion, so that a three-dimensional image with a sense of incongruity is obtained. (5) Front and back side light emission.

  However, in the above-mentioned known example, it is described that an LED panel arranged in a two-dimensional manner is used as an example of a self-luminous display, but until now, the above-described conditions are satisfied with the LEDs arranged in a two-dimensional manner. Therefore, even if a self-luminous two-dimensional display that rotates using an LED panel is configured, it can only have a poor angular resolution, and therefore has a large flicker and a coarse resolution. Only images can be displayed. For this reason, even if a two-dimensional cross-sectional image is displayed on the rotating LED panel in synchronization with the rotation angle, it is impossible to display a decent three-dimensional image at a practical level.

  In addition, two-dimensional image data must be transmitted to the rotating self-luminous two-dimensional display display side, but a transmission line wired to a rotating shaft that rotates the two-dimensional display display side and a fixed conductor that slides on the transmission line When a wired transmission system made of a plate is used, there is a problem in durability and reliability because there is a sliding portion. Therefore, it is conceivable to transmit two-dimensional image data wirelessly to the rotating self-luminous two-dimensional display. However, for example, if the screen of the 2D display is 600 × 480 dots, the 2D display is 30 rotations / second, and a 3-bit (8 colors) 2D image is rewritten 180 times during one rotation, A transfer rate of 600 × 480 × 30 × 3 × 180 = 4.3 Gbps is required, and it is difficult to construct a wireless communication path having such a transfer rate.

  The present invention has been devised in view of the above circumstances, and an object of the present invention is to allow image data to be easily transmitted by wireless communication to the rotating self-luminous two-dimensional display side and to rotate. An object of the present invention is to provide a three-dimensional image display device capable of displaying a three-dimensional image having a practical level of quality using a self-luminous two-dimensional display.

To achieve the above object, the present invention displays a three-dimensional image as a set of the two-dimensional images by switching and displaying two-dimensional images in synchronization with the rotation angle on a rotating self-luminous two-dimensional display panel. to a three-dimensional image display device, a rotating body that rotates by fixed supports the two-dimensional display panel, a support for rotatably supporting the rotating body is mounted on the support, the two-dimensional display A compression means for compressing image data for displaying the two-dimensional image on the panel; a transmission means mounted on the support and transmitting the compressed image data to the rotating body; and mounted on the rotating body. Receiving means for receiving the transmitted compressed image data; and decompression means mounted on the rotating body for restoring the original image data by decompressing the received compressed image data. Each pixel of the two-dimensional display panel of the self light has a number of storage means corresponding to the number of switching the two-dimensional image during one revolution, the storage unit number for switching the 2-dimensional image, 1 The restored image data for rotation is stored, and the image data is simultaneously read from the storage means corresponding to the rotation angles of all the pixels of the self-luminous two-dimensional display panel, whereby each pixel emits light. It is characterized by doing.

As described above, in the three-dimensional image display device of the present invention, the image data of the image displayed on the two-dimensional display panel is compressed on the support side and then transmitted to the rotating body side, thereby reducing the transmission image data amount per unit time. Therefore, the transfer rate at the time of transmission can be lowered. Therefore, it is not necessary to give the transmission / reception means a very high transfer rate, and a large amount of image data that is switched in synchronization with the rotation angle of the two-dimensional display panel by a normal communication method including wireless communication can be easily obtained on the support side Can be transferred to. In particular, since normal wireless communication can be used for communication between the support and the rotating body, mechanical parts such as sliding parts can be eliminated from the communication path, and the durability and reliability of the communication can be improved. be able to.
In the three-dimensional image display device of the present invention, each pixel of the two-dimensional display panel has a number of storage means corresponding to the number of switching of the two-dimensional image during one rotation, and restored image data for one rotation. The image data is read out simultaneously from the storage means corresponding to the rotation angles of all the pixels of the two-dimensional display panel, so that each pixel emits light, so that an image for each rotation angle can be obtained by switching scanning for one pixel. The display of can be switched.

As described above in detail, according to the present invention, a large amount of image data to be displayed on a self-luminous two-dimensional display display that rotates at high speed in synchronization with the rotation angle is compressed from the support side to the rotating side and transmitted. As a result, the amount of transmission image data per unit time can be greatly reduced, and the transfer rate can be lowered. Therefore, it is necessary to provide a very high transfer rate for data communication between the support and the rotating body. The large amount of image data can be easily transferred to the support side by a normal communication method.
Further, by using an organic EL panel as a rotating self-luminous two-dimensional display, the refresh rate when switching and displaying a two-dimensional cross-sectional image in synchronization with the rotation angle on the organic EL panel is increased. Therefore, the three-dimensional image as a set of the two-dimensional cross-sectional images can be displayed without flickering, and a practical level three-dimensional image display apparatus can be realized.
By using a single organic electroluminescence panel that emits light on both sides as a self-luminous two-dimensional display panel, or a panel in which the non-light emitting surfaces of two single-sided organic electroluminescence panels are bonded together, It is possible to display a three-dimensional image without flickering even if the number is reduced.
Furthermore, by using normal wireless communication for communication between the support and the rotating body, mechanical parts such as sliding parts can be eliminated from the communication path, and the durability and reliability of the communication can be improved. Can do.
In addition, since the difference between two adjacent image data in the image data displayed by switching to the two-dimensional display is taken and compressed, the compression is performed when the two adjacent image data are not so different. Is effectively performed, and the amount of image data to be transmitted can be significantly reduced.
Further , since a self-luminous two-dimensional display panel incorporating a storage means is used, image data is read from the storage means and displayed on the display unit in synchronization with the rotation angle of the two-dimensional display panel. It is only necessary to write the decompressed and restored image data into the storage means independently of the synchronization timing of the rotation angle, so that the operation timing control of compression, transmission and decompression can be easily performed, and the control system is simplified. be able to.

  The object of easily transmitting image data to the rotating self-luminous two-dimensional display by wireless communication is realized by compressing the image data and transmitting it to the two-dimensional display.

  FIG. 1 is a perspective view showing an appearance example of a three-dimensional image display apparatus according to the first embodiment of the present invention. The three-dimensional image display device 2 is provided with a cylindrical pedestal portion 4, a disk-shaped rotating plate 6 that is rotatably installed on the upper surface of the pedestal portion 4, and a perpendicularly extending diameter direction of the rotating plate 6. It is composed of a single rectangular organic electroluminescence (hereinafter abbreviated as EL) panel 8. The organic EL panel 8 is a single-sided light emission type as indicated by an arrow 200. When the rotating plate 6 rotates, the organic EL panel 8 also rotates, and the rotation axis O coincides with the center point of the rotating plate 6. However, in FIG. 1, the two-dimensional display panel in the claims corresponds to the organic EL panel 8, the rotating body corresponds to the rotating plate 6, and the support body corresponds to the pedestal portion 4.

  FIG. 2 is a block diagram showing a configuration of a three-dimensional image display circuit that displays an image on the organic EL panel 8.

  The three-dimensional image display circuit is separately mounted on the pedestal 4 and the rotating plate 6. The pedestal unit 4 side receives a receiving unit 12 that receives image data and control information from the outside, a compression unit 14 that compresses the received image data, a memory 16 that provides an operation area of the compression unit 14, and rotates the compressed image data A transmission means 18 for transmitting to the plate 6 side and a control unit 20 for performing image processing of received image data and the like are provided.

  The rotating plate 6 side includes a receiving unit 22 that receives the compressed image data transmitted from the pedestal unit 4 side, a decompressing unit 24 that decompresses the received compressed data and outputs the image data to the organic EL panel 8, and a decompressing unit. A memory 26 that provides 24 operation regions, an organic EL panel 8, that is, an optical or mechanical angle sensor 28 that detects the rotation angle of the rotating plate 6, and a control unit that controls the receiving means 22 and the extension unit 24. 30. However, in FIG. 2, the compression means in the claims corresponds to the compression section 14, the transmission means corresponds to the transmission means 18, and the expansion means corresponds to the expansion section 24.

  Here, the organic EL panel 8 includes a display unit 82 including a storage element (memory) (not shown), a source signal line driving circuit 84 for writing image data in the storage element included in the display unit 82, and the storage element. A writing gate signal line driving circuit 86 for writing image data and a display gate signal line driving circuit 88 are provided and are erected on the rotating plate 6.

  Note that the receiving means 12 of the pedestal unit 4 is connected to a control device 10 constituted by a personal computer (PC) or the like via an external communication path 40.

  FIG. 3 is a circuit diagram showing a circuit configuration of the display unit 82. The display unit 82 includes pixels 90 arranged in a matrix of 320 in the row direction and 200 in the column direction. Each pixel 90 includes a plurality of source signal lines 52 exiting from the source signal line drive circuit 84, a plurality of write gate signal lines X exiting from the write gate signal line drive circuit 86, and a display gate signal line drive circuit 88. A plurality of display gate signal lines Y are connected.

FIG. 4 is a circuit diagram showing a circuit configuration of the pixel 90 constituting the display unit 82. For example, a write side of a storage element 56 such as SRAM is connected to the source signal line 52 via a write switch transistor (TFT) 54, and the read side of the storage element 56 is connected to an organic EL via a display switch transistor (TFT) 58. It is connected to the gate of an EL drive transistor (TFT) 60 that drives the element 62. However, in FIG. 4, the second storage means in the claims corresponds to the storage element 56.

  The n write switch transistors 54, the storage elements 56, and the display switch transistors 58 are obtained by dividing 360 degrees by a rotation angle (2 degrees here) for switching an image displayed on the organic EL panel 8 (n = 180). Just arranged. The gate of the write switch transistor 54 is connected to the write gate signal line X (X = 1 to n), and the gate of the display switch transistor 58 is connected to the display signal line Y (Y = 1 to n). The source of the EL driving transistor 60 is connected to the power supply line 64, the drain is connected to the organic EL element 62, and the other end (cathode side) of the organic EL element 62 is grounded.

  FIG. 5 is a cross-sectional view showing the structure of the organic EL element 62 constituting the pixel 90 shown in FIG. A laminated body in which an organic light emitting layer (light emitting layer in the figure) 70 is sandwiched between a light transmissive cathode 66 and a metal anode 68 is formed on a glass substrate 72 to constitute an organic EL element 62. When a voltage is applied between the light transmissive cathode 66 and the metal anode 68, the organic light emitting layer 70 emits light, and the light is reflected by the metal anode 68, and passes through the light transmissive cathode 66, the protective layer 96, and the transparent seal 98 in one direction. Radiated. The storage element 56 shown in FIG. 3 is mounted in, for example, the glass substrate 72.

  FIG. 6 is a perspective view and a plan view showing a rotating mechanism for rotating the rotating plate 6 described above. As shown in FIG. 6 (A), the center of the rotating plate 6 is pivotally supported by the base portion 4 by a shaft 78 (see FIG. 6 (B)).

  As shown in FIGS. 6A and 6B, four magnets 74 are arranged on the back surface of the rotating plate 6 at equal intervals on the same circumference, and adjacent magnets 74 have different polarities. Furthermore, power receiving coils 76 that receive and receive power and data are arranged between these magnets 74 at equal intervals on the circumference where the magnets 74 are disposed. On the upper surface of the pedestal portion 4, as shown in FIG. 6C, driving coils 44 for driving the rotating plate 6 and for data transmission are arranged at equal intervals on the same circumference. The winding directions of adjacent drive coils 44 are reversed so that the adjacent drive coils 44 have opposite polarities when a current is passed. The diameter of the arrangement circumference of the magnet 74 and the arrangement circumference of the drive coil 44 is the same, and the transmission means 18 of the pedestal portion 4 includes the drive coil 44 and the signal amplifier 46. Further, the power receiving coil 76 of the rotating plate 6 constitutes the receiving means 22.

  Next, the operation of the present embodiment will be described. First, the schematic operation will be described with reference to FIG. In FIG. 1, the rotating plate 6 installed on the upper surface of the pedestal portion 4 rotates at a high speed around the rotation axis O (for example, 900 rpm), so that the organic EL panel 8 erected on the rotating plate 6 rotates at a high speed. To do. In this state, two-dimensional cross-sectional image data obtained when the three-dimensional object to be displayed is virtually cut by the organic EL panel 8 at every rotation angle (for example, 2 degrees) of the organic EL panel 8 To the rotating plate 6 side.

  The organic EL panel 8 temporarily stores two-dimensional cross-sectional image data for each rotation angle in a storage element (not shown), and then reads out the corresponding cross-sectional image data from the storage element in accordance with the rotation angle of the organic EL panel 8. In accordance with the image data, a plurality of pixels arranged in a self-luminous matrix constituting the display unit of the organic EL panel 8 are blinked.

  As a result, a two-dimensional cross-sectional image is displayed by the self-luminous pixels arranged in a matrix and is switched in synchronism with the rotation angle of the organic EL panel 8. A dimensional object image is displayed. In addition, the arrow 200 in a figure has shown the light emission direction of the pixel of the organic EL panel 8, and the organic EL panel 8 of this example is single-sided light emission.

  Here, the organic EL panel 8 has the following well-known characteristics. (1) The reaction speed of the organic EL element constituting the pixel is fast (several tens of microseconds), (2) Since the organic EL element is self-luminous, the viewing angle is wide (near 180 degrees), (3) Organic EL Since the element is self-luminous, high definition, high luminance, and high contrast can be realized. (4) Since the organic EL element is self-luminous, it is very thin (about 1 mm).

  Accordingly, by using the organic EL panel 8 having the above characteristics as a self-luminous two-dimensional display that directly displays the display image by switching the display image in synchronization with the rotation angle, a three-dimensional object can be clearly displayed as a three-dimensional image. Can be displayed.

  Hereinafter, the operation of the present embodiment will be described in more detail. The control apparatus 10 in FIG. 2 generates difference data 302 and 304 with respect to the time change of the three-dimensional object image data of the sphere as shown in FIGS. 7A, 7B, and 7C, for example, The difference data is transmitted to the receiving means 12 of the pedestal unit 4 through the external communication path 40.

  The control unit 20 of the pedestal unit 4 restores the original three-dimensional object image data from the difference data 302 and 304 received from the external communication path 40 by the receiving unit 12. Further, the control unit 20 generates a cross-sectional image generated when the three-dimensional object is virtually cut at the plane of the organic EL panel 8 at each rotation angle (for example, 2 degrees) of the organic EL panel 8 from the restored three-dimensional object image data. Data is generated, and these cross-sectional image data are sequentially output to the compression unit 14.

  Here, when the restored three-dimensional object is, for example, a sphere 802 as shown in FIG. 8A, the control unit 20 performs three-dimensional analysis on the plane of the organic EL panel 8 for each rotation angle of the organic EL panel 8. Cross-sectional image data is generated from a cross-sectional image generated when an object is virtually sliced. In this case, as shown in FIG. 8B, cross-sectional image data 102, 104, 106, 108, 110 of the organic EL panel 8 with rotation angles of 0 degrees, 2 degrees, 4 degrees, 6 degrees, and 8 degrees are generated. Are sequentially output to the compression unit 14. The same applies to rotation angles of 10 degrees and after, and 180 cross-sectional image data are generated per rotation of the organic EL panel 8.

  Next, the compression operation of the cross-sectional image data by the compression unit 14 will be described with reference to FIG. The compression unit 14 uses the memory 16 to calculate difference data between the cross-sectional image data displayed immediately before and the cross-sectional image data displayed next. For example, if the previous cross-sectional image data is data as indicated by 212 in FIG. 9 and the next cross-sectional image data to be displayed is data as indicated by 214 in FIG. 9, the difference data is indicated by 216 in FIG. The shaded area is as shown. The differential data obtained by the compression by the compression unit 14 is output to the transmission unit 18. The transmission means 18 transmits the input difference data to the rotating plate 6 side by wireless communication using electromagnetic coupling. This wireless communication will be described later.

  The receiving means 22 of the rotating plate 6 receives the difference data transmitted from the pedestal unit 4 and outputs it to the extension unit 24. The decompression unit 24 restores the cross-sectional image data for each rotation angle of the organic EL panel 8 from the input difference data using the memory 26. When the cross-sectional image data restored immediately before by the decompression unit 24 is data as indicated by 212 in FIG. 9, the difference data (shaded portion) 216 input this time is added to the cross-sectional image data 212. Thus, the cross-sectional image data to be displayed next time as indicated by 214 in FIG. 9 is restored. The decompression unit 24 sequentially outputs the restored cross-sectional image data to the organic EL panel 8.

  Next, an image display operation on the organic EL panel 8 will be described with reference to FIGS. In FIG. 3, the source signal line drive circuit 84 and the write gate signal line drive circuit 86 of the organic EL panel 8 activate the source signal line 52 and the write gate signal line X in order, and these signal lines cross each other. By transmitting the cross-sectional image data from the source signal line 52 to the pixel 90 connected to the pixel 90, the cross-sectional image data to be displayed by each pixel 90 is stored in the storage element 56 (see FIG. 4) of each pixel 90. Can write. Since there are 180 storage elements 56 for one pixel 90 corresponding to the rotational resolution of the organic EL panel 8 (2 degrees in this example), the memory element 56 in this example corresponds to the rotational angle of the organic EL panel 8. All the cross-sectional image data for the rotation is written in each storage element 56 in one pixel.

  In FIG. 4, the writing gate signal line 1 for writing a cross-sectional image when the rotation angle of the organic EL panel 8 in the writing gate signal line X connected to the pixel 90 is 0 degree is shown. When it becomes high level, the write switch transistor 54 whose gate is connected to the write gate signal line 1 is turned on. As a result, the cross-sectional image data when the rotation angle is 0 degree is written into the storage element 56 connected to the transistor 54 through the source signal line 52. Thereafter, when the write gate signal line 1 becomes low level and the write switch transistor 54 is turned off, and then the write gate signal line 2 becomes high level, the write gate signal line 2 Since the write switch transistor 54 to which the gate is connected is turned on, the cross-sectional image data when the rotation angle is 2 degrees is written to the storage element 56 connected to the transistor 54 through the source signal line 52. Similarly, all cross-sectional image data for one rotation for each rotation angle of the organic EL panel 8 are stored in the plurality of storage elements 56 provided in one pixel 90. Such writing of the cross-sectional image data for each rotation angle with respect to one pixel 90 is similarly performed for all the pixels 90 shown in FIG.

  When all the cross-sectional image data for one rotation for each rotation angle of the organic EL panel 8 is stored in all the pixels 90 constituting the display unit 82 shown in FIG. 3 as described above, the display gate signal line The drive circuit 88 sequentially sets the display gate signal line Y to the high level in synchronization with the detected rotation angle of the angle sensor 8, so that, for example, when the rotation angle is 0 degree from the storage elements 56 of all the pixels 90. The cross-sectional image data is read simultaneously, and the organic EL elements 62 of all the pixels 90 constituting the display unit 82 are blinked. Thereby, a cross-sectional image when the rotation angle of the organic EL panel 8 is 0 degree is displayed on the display unit 82. Therefore, the display of the cross-sectional image for each rotation angle of the organic EL panel 8 can be switched by switching scanning for one pixel.

  Here, the above-described cross-sectional image display operation will be described in units of pixels with reference to FIG. In order to display cross-sectional image data when the rotation angle of the organic EL panel 8 is 0 degree, when the display gate signal line 1 is at a high level, the display switch signal having a gate connected to the display gate signal line 1 is displayed. The transistor 58 is turned on, and the cross-sectional image data when the rotation angle is 0 degree is read from the memory element 56 connected to the transistor 58 and applied to the gate of the EL driving transistor 60. As a result, if the cross-sectional image data is “1”, the EL driving transistor 60 is turned on and a voltage is applied to the organic EL element 62 from the power supply line 64 to emit light. If the cross-sectional image data is “0”, the EL The driving transistor 60 is turned off, no voltage is applied to the organic EL element 62, and no light is emitted.

  By the way, since the storage element 56 built in the organic EL panel 8 is a type that stores 1-bit image data, the image displayed on the organic EL panel 8 has been described on the assumption of a monochrome image. The display image can be colorized by increasing the capacity to multi-bit and A / D converting the image data sent through the source signal line 52 and then storing the data in the storage element 56. By setting the capacity of the memory element 56 to, for example, 3 bits, eight colors can be displayed.

  Next, the rotating operation of the rotating plate 6 and the operation of transmitting electric power from the pedestal 4 side to the rotating plate 6 side will be described with reference to FIGS.

  First, the rotation operation will be described. If the relative positional relationship between the magnet 74 disposed on the back surface of the rotating plate 6 and the drive coil 44 disposed on the top surface of the pedestal portion 4 is as shown in FIG. A current is passed through the coil 44 so as to have the polarity shown in the figure. Here, paying attention to the drive coil 44 (A) having the N pole, the magnet 74 (1) on both sides thereof is the N pole and the magnet 74 (2) is the S pole. A repulsive force is generated between the magnet 74 and the magnet 74 (2). Similarly, repulsive force and attractive force are generated between the other drive coil 44 and the magnets 74 on both sides thereof, and the rotating plate 6 rotates in the direction of the arrow in the figure. In the figure, F is a mark for knowing the rotation direction of the rotating plate 6.

  Thus, the relative positional relationship between the magnet 74 arranged on the back surface of the rotating plate 6 and the drive coil 44 arranged on the upper surface of the pedestal portion 4 changes as shown in FIG. Due to the inertial force 6, the rotating plate 6 goes too far in the left rotation direction, and the magnet 74 disposed on the back surface of the rotating plate 6 and the drive disposed on the upper surface of the pedestal portion 4 as shown in FIG. The relative positional relationship with the coil 44 changes. In this state, the direction of the current flowing through the drive coil 44 is reversed, and the polarity is reversed as shown in FIG.

  As a result, the drive coil 44 (B) changes from the S pole to the N pole, and thus a repulsive force is generated between the drive coil 44 (B) and the adjacent N pole magnet 74 (3). This is the same between the other drive coils 44 and the magnets 74, and as a result, the rotating plate 6 continues to rotate in the counterclockwise direction. As described above, the rotating plate 6 can be rotated at high speed (900 rpm) by switching the direction of the current flowing through the drive coil 44 at high speed according to the relative position of the magnet 74 and the drive coil 44.

  Next, the power transmission operation will be described. As shown in FIG. 6B, the power receiving coil 76 is disposed on the same circumference as the magnet 74 on the back side of the rotating plate 6. When the polarity of the drive coil 44 as an electromagnet is switched by passing a sine wave current to rotate the rotating plate 6 to the drive coil 44 on the pedestal 4 side, the center of the drive coil 44 and the power receiving coil 76 are switched. When both coils are close to each other in a positional relationship where the centers of the coils coincide, the degree of electromagnetic coupling between the coils is maximized, and a sine wave current similar to the sine wave current flowing to the drive coil 44 side is received. It is induced on the coil 76 side. Therefore, the power required on the rotating plate 6 side can be taken out by connecting the four power receiving coils 76 so that the induced current flows in the same direction.

  Finally, an operation for transmitting the compressed image data from the pedestal 4 side to the rotating plate 6 side by wireless communication will be described. The sine wave current flowing to the drive coil 44 side by the transmission means 18 is modulated with the compressed image data input from the compression unit 14. Thereby, the sine wave current induced in the power receiving coil 76 is also a current modulated by the compressed image data. Therefore, the power receiving means 22 can extract the compressed image data from the sine wave current induced in the power receiving coil 76 using a high-pass filter or the like, and demodulate the compressed image data.

  According to the present embodiment, by using the organic EL panel 8 as a self-luminous two-dimensional display that rotates at high speed, a two-dimensional cross-sectional image is formed by the organic EL element 62 having a fast reaction speed constituting the pixel 90. Can be switched and displayed at high speed (for example, around a refresh frequency of about 4.8 KHz) in synchronization with the rotation angle of the organic EL panel 8, the angle resolution can be increased, and the set of the two-dimensional cross-sectional images can be displayed. Since a three-dimensional image can be displayed without flickering, a three-dimensional image display device having a practical level of quality can be realized.

  In particular, since the organic EL panel 8 includes the storage element 56, the sectional image data is temporarily stored in the storage element 56 for each pixel 90, read out in synchronization with the rotation angle of the organic EL panel 8, and read out. By applying data to the EL driving transistor 60 that drives the organic EL element 62, the wiring path until the cross-sectional image data is applied to the EL driving transistor 60 can be shortened, and the time constant of the wiring can be reduced. Therefore, even with an organic EL panel having a long wiring and a large screen size, it is possible to display a three-dimensional image at a high refresh rate. Further, when the displayed three-dimensional image is a still image, once the cross-sectional image data for one rotation is sent to the storage element 56 for every pixel, the cross-sectional image data for one rotation is stored in the storage element. Since the three-dimensional image can be displayed simply by reading from 56, the operations of the three-dimensional image display circuit on the pedestal 4 side, the receiving means 22 on the rotating plate 6 side, and the extending means 24 can be stopped, thereby saving power. Can be planned.

  Further, when transmitting the cross-sectional image data from the pedestal unit 4 to the rotating plate 6 side that rotates at a high speed, the compressing unit 14 compresses the cross-sectional image data and wirelessly transmits it to the rotating plate 6 side. 24 decompresses the received compressed image and restores it to the original cross-sectional image data, so that the amount of transmitted image data per unit time can be reduced, wireless communication with a normal transfer rate, in this example electromagnetic coupling The image data can be easily transmitted from the pedestal unit 4 to the rotating plate 6 side without delay by wireless communication using.

  Furthermore, since cross-sectional image data can be transmitted by wireless communication from the pedestal part 4 to the rotating plate 6 side that rotates at high speed, mechanical parts such as sliding parts can be eliminated from the communication path as in the past, Therefore, it is possible to improve the durability and reliability of the cross-sectional image data transmission.

  Since the organic EL panel 8 is a type having the storage element 56, the compression timing, the wireless transmission, and the expansion timing of the image data can be selected independently of the rotation angle of the organic EL panel 8. The operation timing control of the transmission unit 18, the reception unit 22, and the decompression unit 24 can be easily performed, and the control system can be simplified.

  FIG. 11 is a block diagram showing a 3D image display circuit of a 3D image display apparatus according to the second embodiment of the present invention. However, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

  The three-dimensional image display circuit of this example is also divided and mounted on the pedestal 4 and the rotating plate 6, but the structure of the organic EL panel 94 erected vertically on the rotating plate 6 has a storage element inside. It is a normal organic EL panel that does not have. Accordingly, the cross-sectional image data expanded and restored by the expansion unit 24 is temporarily stored in the image memory 120 and then read out in synchronization with the rotation angle of the organic EL panel 94 to be input to the organic EL panel 94. The control unit 30 performs the read / write control of the cross-sectional image data to the image memory 120. These points are different from the first embodiment, and other configurations are the same as those of the three-dimensional image display circuit of the first embodiment. The image memory 120 also provides a memory area when the decompression unit 24 decompresses the compressed image data. However, in FIG. 11, the first storage means in the claims corresponds to the image memory 120, and the storage control means corresponds to the control unit 30.

  Although illustration and explanation are omitted, other configurations and operations such as a three-dimensional image display circuit for displaying an image on the organic EL panel 94, a rotating mechanism of the rotating plate 6, and a power transmission system are the same as those in the first embodiment. It is the same.

Next, the operation of this embodiment will be described. The compression unit 14 of this example also takes the difference between the previous cross-sectional image data generated by the control unit 20 and the cross-sectional image data transmitted this time,
The cross-sectional image data is compressed, and the compressed cross-sectional image data is transmitted from the transmission means 18 to the rotating plate 6 side by radio communication using electromagnetic coupling.

  The decompression unit 24 on the rotating plate 6 side decompresses the compressed image data received by the receiving unit 22 using a preset area of the image memory 120 to restore the original cross-sectional image data. The control unit 30 writes the cross-sectional image data restored by the decompression unit 24 to the image memory 120. The image memory 120 stores in advance cross-sectional image data for at least two screens of the organic EL panel 94, in other words, for two angles or more. Write it down.

  Here, the cross-sectional image data to be displayed and the cross-sectional image data are created in the display order by the control unit 20 and then compressed and transmitted by the compression unit 14. Therefore, in the image memory 120, the writing order of the cross-sectional image data to be displayed first is the oldest.

  Next, in synchronization with the detected rotation angle of the angle sensor 28 (rotation angle of the organic EL panel 94), the control unit 30 obtains the cross-sectional image data to be displayed corresponding to the rotation angle and the oldest stored cross-sectional image data. By reading out from the image memory 120 and outputting to the organic EL panel 94 to display a cross-sectional image, the decompression unit 24 is controlled by writing the cross-sectional image data newly restored by the decompression unit 24 into the image memory 120. The lag of the display timing of the cross-sectional image data synchronized with the restoration timing of the cross-sectional image data and the rotation angle of the organic EL panel 94 is adjusted.

  In this embodiment, the organic EL panel 94 having a normal configuration without a storage element is used. However, when the screen size is small, the wiring for transmitting image data to the pixels is short and the wiring capacity is small, so that the refresh rate is set. It is possible to increase the speed, and it is possible to display a three-dimensional image having a practical level of quality as in the first embodiment. Moreover, since the organic EL panel 8 having a normal configuration is inexpensive, the cost of the apparatus can be reduced accordingly.

  Similarly to the first embodiment, when transmitting the cross-sectional image data from the pedestal unit 4 to the rotating plate 6 side that rotates at high speed, the compressing unit 14 compresses the cross-sectional image data and wirelessly transmits it to the rotating plate 6 side. By transmitting and decompressing the compressed image by the decompression unit 24 on the rotating plate 6 side and restoring the original cross-sectional image data, the amount of transmitted image data per unit time can be reduced. Therefore, the cross-sectional image data can be easily transmitted from the pedestal 4 to the rotating plate 6 side without delay by wireless communication having a normal transfer rate, in this example, wireless communication using electromagnetic coupling.

  In addition, the cross-sectional image data restored by the decompression unit 24 is temporarily stored in the image memory 120 and then output to the organic EL panel 94 in synchronization with the rotation angle, thereby restoring the cross-sectional image data and the cross-sectional image data. Since the display timing lag can be adjusted, the timing of image data compression, wireless transmission, and decompression can be selected independently of the rotation angle of the organic EL panel 8, so that the compression unit 14, transmission means 18, reception means 22, decompression The operation timing control of the unit 24 can be easily performed, and the control system can be simplified.

  Furthermore, if the displayed three-dimensional image is a still image, once the cross-sectional image data for one rotation is held in the image memory 120, the cross-sectional image data for one rotation is read from the image memory 120 thereafter. Since the three-dimensional image can be displayed only by this, the operations of the three-dimensional image display circuit on the pedestal 4 side, the receiving means 22 on the rotating plate 6 side, and the extending means 24 can be stopped, thereby saving power. it can.

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary, it can implement also with another various form in a concrete structure, a function, an effect | action, and an effect.

  In the above embodiment, the image is compressed by taking the difference between two adjacent slice image data. However, the compression method is not limited to this, and redundant portions of the slice image data, for example, the background portion are deleted. The image itself may be compressed, or the image may be compressed by sending only the data for restoring the image by the decompression unit. Further, if the cross-sectional image data changes over time, the time The image can be compressed by sending only the part changed by the above, and various compression methods can be applied.

  In the above embodiment, electromagnetic coupling is used as a wireless transmission method of the cross-sectional image data between the pedestal unit 4 and the rotating plate 6, but various methods such as a normal wireless method using radio waves and an optical communication method using infrared rays are used. A wireless system can be used.

  Further, in the above embodiment, the organic EL panels 8 and 94 are of single-sided emission, but the single-sided organic EL panel is of double-sided emission or the non-light-emitting surface of two single-sided emission of organic EL panels. By using a single-sided organic EL panel that emits light on both sides, the organic EL panels 8 and 94 have the same three-dimensional quality without flickering even when the number of rotations of the organic EL panels 8 and 94 is halved, for example. An image can be displayed, and accordingly, the power consumption of the rotating mechanism of the rotating plate 6 can be reduced, and the design can be facilitated. In particular, in the case where two organic EL panels are bonded to form one panel, the brightness of the display image is not halved as in the type in which one organic EL panel can emit light on both sides. Since this is the same as the above embodiment, even if the number of rotations of the organic EL panel 92 is reduced, a flicker-free and bright three-dimensional image can be obtained.

  In the above embodiment, the control device 10 is connected to the pedestal 4 side of the three-dimensional image display circuit via the external communication path 40. However, the difference data with respect to the time change of the three-dimensional object image data Can be connected to various video devices such as a receiver and an optical disk playback device.

It is the perspective view which showed the example of an external appearance of the three-dimensional image display apparatus which concerns on the 1st Embodiment of this invention. FIG. 2 is a block diagram illustrating a configuration of a three-dimensional image display circuit that displays an image on the organic EL panel 8 illustrated in FIG. 1. FIG. 3 is a circuit diagram illustrating a circuit configuration of a display unit 82 illustrated in FIG. 2. FIG. 3 is a circuit diagram illustrating a circuit configuration of a pixel 90 configuring the display unit 82 illustrated in FIG. 2. FIG. 5 is a cross-sectional view illustrating a structure of an organic EL element 62 that constitutes a pixel 90 of the display unit of the organic EL panel 8 illustrated in FIG. 4. It is the perspective view and top view explaining the rotation mechanism which rotates the rotating plate 6 shown in FIG. It is the figure which showed the method of producing | generating the difference data with respect to the time change of the three-dimensional object image data of a sphere with the control apparatus 10 shown in FIG. It is the figure which showed the method of producing the cross-sectional image data from the three-dimensional object image data decompress | restored by the control part 20 shown in FIG. It is a figure explaining the compression and expansion | extension operation | movement of the compression part 14 and the expansion | extension part 24 which were shown in FIG. It is a figure explaining the operation | movement which rotates the rotating plate 6 shown in FIG. 1, FIG. It is the block diagram which showed the three-dimensional image display circuit of the three-dimensional image display apparatus which concerns on the 2nd Embodiment of this invention. It is the figure which showed schematic structure of the conventional volume scanning type three-dimensional display apparatus. It is a figure explaining the principle which can display a three-dimensional image with the volume scanning type three-dimensional display apparatus shown in FIG.

Explanation of symbols

2 ... 3D image display device, 4 ... base, 6 ... rotating plate, 8, 94 ... organic electroluminescence panel (organic EL panel), 10 ... control device, 12, 22 ... receiving means, 14 …… Compression unit, 16, 26 …… Memory, 18 …… Transmission means, 20, 30 …… Control unit, 24 …… Extension unit, 28 …… Angle sensor, 40 …… External communication path, 44 …… Drive Coil, 46 ... Signal amplifier, 52 ... Source signal line, 54 ... Write switch transistor (TFT), 56 ... Storage element (memory), 58 ... Display switch transistor (TFT), 60 ... EL Driving transistor (TFT), 62... Organic EL element, 64... Power supply line, 66... Light transmissive cathode, 68... Metal anode, 70. …magnet 76: Power receiving coil, 78: Shaft, 82: Display, 84: Source signal line driving circuit, 86: Writing gate signal line driving circuit, 88 ... Displaying gate signal line driving circuit, 90 ...... Pixel, 96 ...... Protective layer, 98 ...... Transparent seal, 120 ...... Image memory, X ...... Write gate signal line, Y ...... Display gate signal line.

Claims (5)

A three-dimensional image display apparatus for displaying a three-dimensional image as a set of the two-dimensional image by displaying by switching the 2-dimensional images in synchronism with the rotation angle in a two-dimensional display panel of a rotating self-luminous,
A rotating body for fixing and rotating the two-dimensional display panel;
A support for rotatably supporting the rotating body;
Compression means mounted on the support and compressing image data for displaying the two-dimensional image on the two-dimensional display panel;
Transmitting means mounted on the support and transmitting the compressed image data to the rotating body; receiving means mounted on the rotating body and receiving the transmitted compressed image data;
A decompression unit mounted on the rotating body and restoring the original image data by decompressing the received compressed image data ;
Each pixel of the self-luminous two-dimensional display panel has a number of storage means corresponding to the number of switching the two-dimensional image during one rotation,
The number of the storage means for switching the two-dimensional image stores the restored image data for one rotation,
Each pixel emits light by simultaneously reading the image data from the storage unit corresponding to the rotation angle of all the pixels of the self-luminous two-dimensional display panel.
3-dimensional image display apparatus characterized by. The three-dimensional image display device according to claim 1, wherein the self-luminous two-dimensional display panel is an organic electroluminescence panel. The three-dimensional image display device according to claim 1, wherein the compression transmission unit transmits the compressed image data to a reception expansion unit by wireless communication. The compression transmission means compresses the image data by taking the difference between the image data of two adjacent screens displayed on the two-dimensional display panel to obtain difference image data, and the reception decompression means decompresses and restores the previous data. The three-dimensional image display device according to claim 1, wherein the image data to be displayed on the two-dimensional display panel is restored from the image data and the difference image data received this time. The self-luminous two-dimensional display panel is a single-sided organic electroluminescence panel that emits light on both sides, or a panel in which the non-light-emitting surfaces of two single-sided organic electroluminescence panels are bonded together. The three-dimensional image display device according to claim 1.

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