JP2005045629A - Three dimensional image display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To vividly display a three dimensional image, particularly irrespective of its image size, having a practical quality level by using a rotating and self-luminous two dimensional display. <P>SOLUTION: Using an organic EL panel as a rotating and self-luminous panel, image data are stored in storage elements 56 provided at every pixel 90. Thereafter, by synchronizing with the rotation angle of the organic EL panel, reading the image data out of the storage elements 56 corresponding to the rotation angle, and controlling an EL driving transistor 60 by using the image data to blink organic EL elements; a two dimensional image is displayed on the organic EL panel. Therefore, the storage elements 56 and the EL driving transistor 60 are adjacently arranged regardless of an organic EL panel screen size, and the wiring capacitance for transmitting the read-out image data is reduced to enable the time constant of wiring capacitance to be decreased. Hence, the refresh rate can be always high-speed. As a result, the three dimensional image can be vividly displayed regardless of the screen size. <P>COPYRIGHT: (C)2005,JPO&NCIPI

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. 14 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, the cross-sectional image of the three-dimensional object 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. 15B, when the angle (rotation angle) is 1, the screen 136 is in a position slightly entering the three-dimensional object 142, and the cut surface 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. 15C 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.

  The present invention has been devised in view of the above circumstances, and an object of the present invention is to use a rotating self-luminous two-dimensional display to produce a three-dimensional image having a practical level of quality, particularly its screen size. It is an object of the present invention to provide a three-dimensional image display device that can display clearly regardless of the above.

  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. The two-dimensional display panel includes a storage unit that stores image data of the two-dimensional image, and the image data from the storage unit in synchronization with the rotation of the two-dimensional display panel. And a display unit that displays the image corresponding to the read image data on the display unit of the two-dimensional display panel.

  Thus, in the three-dimensional image display device of the present invention, the rotating self-luminous two-dimensional display panel temporarily stores the image data of the two-dimensional image to be displayed in synchronization with the rotation angle, and then reads and displays it on the display unit. By incorporating a display means, a storage element for storing image data and a display driving transistor are arranged close to each other, and the wiring path until the read image data is applied to the display driving transistor is shortened. Therefore, the time constant can be reduced by reducing the wiring capacitance. Therefore, even when, for example, an organic electroluminescence panel having a large screen size is used as the two-dimensional display panel, the wiring capacity can be reduced and the time constant can be reduced regardless of the screen size, and a high refresh rate can be ensured. Therefore, a clear three-dimensional image can be displayed regardless of the screen size.

As described above in detail, according to the present invention, the rotating self-luminous two-dimensional display panel temporarily stores image data of a two-dimensional image to be displayed in synchronization with the rotation angle, and then reads and displays the image data. Since the display means is incorporated, the time constant until the read image data is applied to the display driving transistor can be shortened and the time constant can be reduced regardless of the screen size of the two-dimensional display panel. The refresh rate can always be increased, and a clear three-dimensional image can be displayed.
In addition, with the above configuration, since the refresh rate can be further increased when the refresh rate is originally high, the switching of the two-dimensional image displayed on the two-dimensional display panel can be accelerated, and the displayed three-dimensional image can be changed. It is possible to display a clearer three-dimensional image by increasing the resolution and the angular resolution.
Further, since the image data once stored and read is displayed in synchronization with the rotation angle of the two-dimensional display panel, the image data storage timing does not need to be synchronized with the rotation angle of the two-dimensional display panel. Can be simplified and power consumption can be reduced.
Further, when the displayed 3D image is a still image, once the image data of the 2D image for one rotation displayed on the 2D display panel is stored once, there is no need to rewrite the image data thereafter. Since it is only necessary to read out the stored image data and display it on the two-dimensional display panel, it is possible to stop the operation of various circuits such as storage of image data and image processing at the previous stage, and power consumption. Can be greatly reduced.
Furthermore, as described above, the refresh rate can always be increased regardless of the screen size, so that the screen of the two-dimensional display panel can be enlarged.
Also, by controlling the timing to read and display the stored image data in synchronization with the rotation of the two-dimensional display panel, the display position of the three-dimensional image is set in the rotation direction of the two-dimensional display panel or in the opposite direction. It can be shifted and displayed.
Furthermore, the above-described effects can be obtained with certainty by using a storage element built-in type organic electroluminescence panel as a self-luminous two-dimensional display panel.

  An organic electroluminescence panel with a built-in storage element that stores image data for the purpose of displaying a 3D image with practical quality using a rotating self-luminous 2D display clearly regardless of the screen size. This is realized by using the two-dimensional display.

  FIG. 1 is a perspective view showing an appearance example of a three-dimensional image display device according to an embodiment of the present invention.

  The three-dimensional image display device 2 is provided with a cylindrical pedestal portion 4, a disc-shaped rotation plate 6 that is rotatably and vertically installed on the upper surface of the pedestal portion 4, and a diametrical direction of the rotation 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, the two-dimensional display panel in the claims corresponds to the organic electroluminescence panel 8.

  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.

  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. However, the display unit in the claims corresponds to the display unit 82, and the display shift control means corresponds to the control unit 30.

  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 (1) to 52 (320) output from the source signal line drive circuit 84, a plurality of write gate signal lines X output from the write gate signal line drive circuit 86, and a display. The display gate signal lines Y are connected to a plurality of display gate signal lines Y from the display gate signal line driving circuit 88.

  FIG. 4 is a circuit diagram showing the configuration of the write gate signal line drive circuit 86 shown in FIGS. Write gate signal line drive circuit 86 is selected from shift registers (SR) 92 (1) to 92 (200) that select which row in write gate signal line X is active. In the line corresponding to the rotation angle of the organic EL panel 8 (in this example, 0 degrees (angle 1), 2 degrees (angle 2), 4 degrees (angle 3),..., 358 degrees (angle 180)). Shift register (SR) 94 (1)-(180) for selecting which of the embedded gate signal lines 1-180 (see FIG. 7) to be active, and the write gate signal line for each line A transistor group 96 (1) to 96 (200) including transistors Tr1 to Tr180 for driving 1 to 180 is provided.

  FIG. 5 is a circuit diagram showing the configuration of the source signal line driving circuit 84 shown in FIGS. The source signal line drive circuit 84 includes shift registers (SR) 98 (1) to 98 (320) that select which column in the source signal line X is active, and shift registers 98 (1) to 98. When the hold value of (320) is “1”, latches (LAT) 152 (1) to 152 (320) for latching image data on the video signal line 150 and latches 152 (1) to 152 (320) are latched. The latches 154 (1) to 154 (320) and the latches 154 (1) to 154 (320) that operate the latched image data are operated simultaneously with the end of the latch of the image data of the latch 152 (320). A control signal line 156 for transmitting a control signal is provided.

  FIG. 6 is a circuit diagram showing the configuration of the display gate signal line driving circuit 88 shown in FIGS. A shift for selecting which of the display gate signal lines 1 to 180 (Y) shown in FIG. 7 to be described later is to be activated in synchronization with the rotation angle of the organic EL panel 8. It has registers (SR) 160 (1) to 160 (180).

  FIG. 7 is a circuit diagram showing a circuit configuration of the pixel 90 constituting the display unit 82 shown in FIGS. 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.

  N write switch transistors 54, storage elements 56, and display switch transistors 58 are obtained by dividing 360 ° by a rotation angle (2 ° in this case) for switching an image to be displayed on the organic EL panel 8 (rotation resolution N = 180). The gate of the write switch transistor 54 is connected to the write gate signal line X (X = 1 to 180), and the gate of the display switch transistor 58 is connected to the display signal line Y (Y = 1 to 180). 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. However, the storage means in the claims corresponds to the storage element 56, the write switch transistor 54, the source signal line drive circuit 84 and the write gate signal line drive circuit 86 shown in FIG. This corresponds to the switching transistor 58 and the display gate signal line driving circuit 88 shown in FIG.

  FIG. 8 is a 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 126, and the transparent seal 128 in one direction. Radiated. Note that the storage element 56 shown in FIG. 7 is mounted in, for example, the glass substrate 72.

  FIG. 9 is a perspective view and a plan view showing a rotating mechanism for rotating the rotating plate 6 described above. As shown in FIG. 9 (A), the center of the rotating plate 6 is pivotally supported on the pedestal 4 by a shaft 78 (see FIG. 9 (B)).

  As shown in FIGS. 9A and 9B, on the back surface of the rotating plate 6, four magnets 74 are arranged 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. Further, on the upper surface of the pedestal portion 4, as shown in FIG. 9C, drive 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 device 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. 10 (A), 10 (B), and 10 (C), 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. 11A, 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. 11B, cross-sectional image data 102, 104, 106, 108, 110 of the organic EL panel 8 with rotation angles of 0 degree, 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.

  The compression unit 14 calculates difference data between the previous slice image data and the next slice image data to be displayed using the memory 16, and outputs the obtained difference data 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, and 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. The cross-sectional image data to be displayed by each pixel 90 is sent to the storage element 56 (see FIG. 7) of each pixel 90 by sending the cross-sectional image data from the source signal line 52 to the pixel 90 connected to the pixel 90. Can write. Since there are 180 storage elements 56 in this example corresponding to the rotation resolution of the organic EL panel 8 (180 in this example) for one pixel 90, one rotation corresponding to the rotation angle of the organic EL panel 8. All the cross-sectional image data of minutes are written in each storage element 56 in one pixel.

  Here, the operation of the source signal line drive circuit 84 will be described in more detail. When the image data of angle 1 is written to the pixels 90 in the first row in FIG. 3, the start signal “1” is input to the shift register 98 (1) in FIG. At this timing, image data of angle 1 as shown in FIG. 12 to be written to the pixels 90 in the first row and the first column is output to the video signal line 150. However, the portions indicated by 1, 2,..., 320 in FIG. 12 are cross-sectional image data displayed on the pixels 90 in the first column to the 320th column of the display unit 82, and these cross-sectional images are 180 angles worth per row. is there. Further, such cross-sectional image data is for the first to 200th rows.

  When the start signal “1” is input to the shift register 98 (1), the output is “1”, so that the latch 152 (1) is the pixel in the first row and first column on the video signal line 150. The angle 1 image data to be written to 90 is latched.

  At the next timing, clocks are input to all the shift registers 98, and “1” held in the shift register 98 (1) is shifted to the shift register 98 (2), and this shift register 98 (2) is held. Is done. At this timing, image data of angle 1 as shown in FIG. 12 to be written to the pixels 90 in the first row and the second column is output to the video signal line 150. When “1” is input to the shift register 98 (2), the output is “1”, so that the latch 152 (2) is connected to the pixel 90 in the first row and second column on the video signal line 150. Latch the image data of angle 1 to be written.

  The same applies to the following, each time “1” is sequentially shifted and held in the shift registers 98 (3) to 98 (320), the first row, the third column, the first row, as shown in FIG. The image data of the angle 1 to be written in the pixel 90 in the fourth column,..., The first row and the 320th column is sequentially latched in the latches 152 (3), 152 (4),. . Thus, when the image data of angle 1 is latched in all the latches 152, a control signal of “1” is output to the control signal line 156, and the first row, the first row are output to the latches 154 (1) to 154 (320). The image data of the angle 1 to be written to the pixels 90 in the column, the first row, the second column,..., The first row and the 320th column are latched all at once, and the latches 154 (1) to 154 (320) Image data of angle 1 to be written to the pixels in the first row is output on the source signal lines (1) to (320) which are output signal lines.

  On the other hand, when image data of angle 1 is written to the pixels 90 in the first row in FIG. 3, the start signal “1” is sent to the shift register 92 (1) shown in FIG. Is output, the output of the shift register 92 (1) is "1", that is, the transistor Tr1 to Tr18 of the transistor group 96 (1) that controls the write gate signal line X in the first row. These transistors are brought into an operable state by setting the source of the transistor to high level.

  In this state, when the start signal “1” is input to the shift register 94 (1) at the timing when the rotation angle of the organic EL panel 8 becomes the angle 1, the output of the shift register 94 (1) is “1”. Thus, Tr1 of the transistor group 96 (1) is turned on, and the writing gate signal line 1 connected to the drain of Tr1 becomes “1”, that is, high level, and all the pixels 90 in the first row The memory element 56 for angle 1 can be stored. At that time, from the source signal lines 52 (1) to 52 (320), the first row, the first column, the first row, the second column,. Since the image data is output, the image data of angle 1 is written all at once to the storage elements 56 for angle 1 of all the pixels 90 in the first row.

  Next, at the timing when the rotation angle of the organic EL panel 8 becomes angle 2, a clock is input to the shift register 94, and the signal “1” is shifted from the shift register 94 (1) to the shift register 94 (2) and held. Therefore, Tr2 of the transistor group 96 (1) is turned on, and the write gate signal line 2 connected to the drain of Tr2 becomes “1”, that is, the high level, and all the pixels 90 in the first row 90 The memory element 56 for angle 1 is made memorable. At that time, the same operation as described above is repeated from the source signal lines 52 (1) to 52 (320), and the first row, the first column, the first row, the second column,. Since the image data of the angle 2 in the first row and the 320th column is output, the image data of the angle 2 is simultaneously written in the storage devices 56 for the angle 2 of all the pixels 90 in the first row. In the same manner, the image data of angles 3 to 180 is written in the storage elements 56 for angles 3 to 180 of all the pixels 90 in the first row.

  Thus, when image data of angles 3 to 180 is written in the storage elements 56 for angles 3 to 180 of all the pixels 90 in the first row, a clock is supplied to the shift register 92 constituting the write gate signal line drive circuit 86. Is output, the signal “1” is shifted from the shift register 92 (1) to the shift register 92 (2), the output of the shift register 92 becomes high level, and the writing connected to the pixels in the second row is performed. The transistors Tr1 to Tr18 of the transistor group 96 (2) that controls the embedded gate signal line X are made operable.

  In this state, when the start signal “1” is input to the shift register 94 (1) at the timing when the rotation angle of the organic EL panel 8 becomes the angle 1, the output of the shift register 94 (1) is “1”. Thus, Tr1 of the transistor group 96 (2) is turned on, and the writing gate signal line 1 connected to the drain of Tr1 becomes “1”, that is, high level, and all the pixels 90 in the second row The memory element 56 for angle 1 can be stored. At that time, from the source signal lines 52 (1) to 52 (320), the second row, the first column, the first row, the second column,..., The angle 1 of the first row, the 320th column, respectively. Since the image data is output, the image data of angle 1 is written all at once to the memory elements 56 for angle 1 of all the pixels 90 in the second row. By repeating the above operation, image data of angle 1 to angle 180 for one rotation is stored in all the pixels 90 in 200 rows and 320 columns.

  Next, the cross-sectional image data writing operation described above will be described in units of pixels in FIG. In FIG. 7, the write gate signal line 1 for writing cross-sectional image data when the rotation angle of the organic EL panel 8 in the write gate signal line X connected to the pixel 90 is angle 1. 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 angle 1 cross-sectional image data is written to the storage element 56 connected to the write switch 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 at the angle 2 is written into the storage element 56 connected to the write switch transistor 54 through the source signal line 52. Similarly, all the cross-sectional image data for one rotation of the organic EL panel 8 is stored in each of the 180 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 each rotation angle of one rotation 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, it is shown in FIG. The display gate signal line driving circuit 88 performs the following operation. That is, the display gate signal line drive circuit 88 inputs the start signal “1” to the shift register 160 (1) when the detected rotation angle of the angle sensor 28 becomes angle 1, and the shift register 160 (1). Is set to "1", and the display gate signal line 1 connected to the output side of the shift register 160 (1) is set to "1". Next, when the detected rotation angle of the angle sensor 28 reaches the angle 2, the signal “1” is shifted and held in the shift register 160 (2), and is connected to the output side of the shift register 160 (2). The display gate signal line 2 is set to “1”. Similarly, the display gate signal line Y is sequentially set to the high level in synchronization with the rotation angle detected by the angle sensor 28. Here, when the display gate signal line 1 becomes high level, the cross-sectional image data of the angle 1 is simultaneously read from the storage elements 56 of all the pixels 90 configuring the display unit 82, and the organic EL elements 62 of the respective pixels 90 are read. Flashes to display a cross-sectional image of angle 1. In the same manner, the cross-sectional image data of angle 2, angle 3,..., And angle 180 are read out, and the organic EL elements 62 of all the pixels 90 constituting the display unit 82 are blinked. The cross-sectional images when the rotation angle of the panel 8 is angle 2,..., Angle 180 are sequentially switched and displayed.

  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 angle 1, when the display gate signal line 1 becomes a high level, the display switch for which the gate is connected to the display gate signal line 1 The transistor 58 is turned on, and the cross-sectional image data at the angle 1 is read from the storage element 56 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.

  Here, when the cross-sectional images for each rotation angle for one rotation are displayed on the organic EL panel 8 that rotates at high speed as described above, a three-dimensional image as a set of these cross-sectional images is displayed. In this case, when the rotation angle of the organic EL panel 8 is angle 1, the display gate signal line driving circuit 88 reads the cross-sectional image data of the angle 1 from the storage element 56 and reads the organic EL element 62. If the cross-sectional image of angle 1 is displayed on the display unit 82 and the cross-sectional images of angle 2, angle 3,... A dimensional image is displayed.

  However, when the rotation angle of the organic EL panel 8 is angle 1 + α degrees, the cross-sectional image data of angle 1 is read and displayed on the display unit 82, and similarly, the cross-sectional image data of angle 2 is read and rotated once when the angle is 2 + α degrees. Is displayed on the display unit 82, the displayed three-dimensional image is also displayed at a position rotated α degrees from the normal position. Therefore, when the control unit 30 gives the rotation information α as described above to the display gate signal line driving circuit 88, the position of the three-dimensional image can be rotated and displayed by α degrees.

  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. 9 and 13.

  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 upper 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 disposed on the back surface of the rotating plate 6 and the drive coil 44 disposed on the upper surface of the pedestal portion 4 changes as shown in FIG. Due to the inertia force of 6, the rotation plate 6 goes too far in the left rotation direction, and the magnet 74 disposed on the back surface of the rotation plate 6 and the drive disposed on the upper surface of the pedestal 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 inverted 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. 9B, 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. Moreover, since it is not a projection image, a clear three-dimensional image can be displayed. The organic EL panel 8 of this example is of a single-sided emission type. However, if the refresh rate is sufficiently high, the number of rotations of the organic EL panel 8 can be increased accordingly, and the single-sided emission type. However, the effects described above can be obtained.

  Further, since the organic EL element 62 is self-luminous, the viewing angle is wide, and the display image can be seen no matter what angle the organic EL panel 8 is viewed. Therefore, as a set of continuous two-dimensional cross-sectional images. The three-dimensional image can be completely displayed, and the observer can clearly see the displayed three-dimensional image from any position. Furthermore, since the organic EL element 62 is self-luminous, a three-dimensional object image can be displayed with high definition (high resolution), high luminance, and high contrast, and the display quality of the three-dimensional image can be significantly improved. Moreover, since the organic EL element 62 is self-luminous, the organic EL panel 8 can be made very thin. Therefore, a portion where a three-dimensional image cannot be displayed can be almost eliminated due to the thickness of the organic EL panel 8, and there is no sense of incongruity. A three-dimensional image can be clearly displayed.

  Further, for each pixel 90, all cross-sectional image data to be displayed during one rotation of the organic EL panel 8 is temporarily stored in the storage element 56, and then read out in synchronization with the rotation angle of the organic EL panel 8, and read out. Since the image data is applied to the EL driving transistor 60 that drives the organic EL element 62, the storage element 56 and the EL driving transistor 60 can be arranged close to each other. Since the wiring path to be applied to the transistor 60 can be shortened, the wiring capacity can be reduced and the time constant thereof can be reduced, the refresh rate can be increased even in the organic EL panel 8 having a large screen size. Regardless of the screen size of the panel 8, a three-dimensional image having a practical level of quality can be clearly displayed.

  Note that the organic EL panel 8 having a large screen size has a long wiring path for transmitting cross-sectional image data and a large time constant thereof, so that switching of the display image tends to be slow and its refresh rate tends to be slow.

  In addition, for each pixel 90, all the cross-sectional image data to be displayed while the organic EL panel 8 rotates once is temporarily stored in the storage element 56, and then read out in synchronization with the rotation angle of the organic EL panel 8 to display the display unit 82. Therefore, when the rotation angle of the organic EL panel 8 is angle 1 + α degrees, the cross-sectional image data of the angle 1 and later is displayed at the timing when the cross-sectional image data of the angle 1 is read and displayed on the display unit 82. The displayed 3D image can be displayed with an arbitrary angle (α) shifted from the normal position. For example, the 3D image of the face of a person facing the front is shifted 90 degrees and turned sideways. It can also be displayed at the position.

  Further, when the 3D image data to be displayed is a still image, the cross-sectional image data for one rotation of the organic EL panel 8 is stored in the storage element 56 of the organic EL panel 8, and then the display gate signal line is displayed. Since a three-dimensional image can be displayed by operating only a part of the circuits such as the drive circuit 88, the operations of the receiving means 22, the expansion unit 24, the three-dimensional image display circuit on the pedestal unit 4 side, etc. can be stopped. Electricity can be achieved.

  In addition, for each pixel 90, all cross-sectional image data to be displayed while the organic EL panel 8 rotates once is temporarily stored in the storage element 56, read out in synchronization with the rotation angle of the organic EL panel 8, and read out. Since the image data is applied to the EL driving transistor 60 that drives the organic EL element 62, the writing timing of the cross-sectional image data to the organic EL panel 8 is performed without synchronizing with the rotation angle of the organic EL element 62. Therefore, the operation timing control of the compression unit 14, the transmission unit 18, the reception unit 22, and the decompression unit 24 can be easily performed, and the control system can be simplified.

  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.

  For example, in the organic EL panel 8 of the present embodiment, as shown in FIGS. 3 to 7, the cross-sectional image data is temporarily stored in the storage element 56 for each pixel 90 and then synchronized with the rotation angle of the organic EL panel 8. As a configuration in which the read cross-sectional image data is applied 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 is shortened to reduce the wiring. By reducing the time constant, an organic EL panel having a large screen size can be displayed at a high refresh rate so that a three-dimensional image can be displayed. However, since the wiring is short when the screen size of the organic EL panel 8 is small, the refresh rate can be increased even in a normal configuration without the above-described storage element, so that the organic EL panel 8 has a normal configuration without a storage element. Even if this panel is used, a three-dimensional image can be displayed. Moreover, since the organic EL panel 8 having a normal configuration is inexpensive, the cost of the apparatus can be reduced accordingly. However, in this case, as an example, two-dimensional cross-sectional image data is supplied to the organic EL panel 8 at a timing synchronized with the rotation angle of the organic EL panel 8 between the extension unit 24 and the organic EL panel 8 in FIG. It is necessary to provide a timing control circuit.

  For example, in the above embodiment, a rotary drive mechanism is provided in which a plurality of magnets 74 and a power receiving coil 76 are arranged on the rotating plate 6 side, and a plurality of driving coils 44 are arranged on the pedestal portion 4 side. The power and image data are wirelessly transmitted by the electromagnetic coupling 44, but the rotating plate 6 is rotated by a motor or the like as in the prior art, and the power and image data are electromagnetically coupled from the pedestal 4 side to the rotating plate 6 side. The power may be wirelessly transmitted using power, or the power may be wirelessly transmitted using electromagnetic coupling, and the image data may be transmitted by a normal wireless communication method such as optical communication or short-range wireless communication.

  Further, in the above-described embodiment, the single-sided emission type is used as the organic EL panel 8, but the single-sided organic EL panel is a double-sided emission type, and the non-emission surfaces of the two single-sided emission type organic EL panels are pasted together. By using a single-sided organic EL panel that emits light on both sides, a three-dimensional image of the same quality that does not flicker can be displayed even if the number of rotations of the organic EL panel is reduced to, for example, half that of the above embodiment. Accordingly, the power consumption of the rotating mechanism of the rotating plate 6 can be reduced correspondingly, 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. Therefore, even if the number of rotations of the organic EL panel is reduced, a bright three-dimensional image without flickering can be obtained. In addition, as the organic EL panel having a normal configuration, a type in which a driving circuit for driving pixels is not integrally formed in the panel can be used.

  Further, in the above embodiment, 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 storage capacity of the element 56 is made multi-bit, the image data sent through the source signal line 52 is A / D converted, and then stored in the storage element 56, whereby the display image can be colored. Eight colors can be displayed by setting the storage capacity of the storage element 56 to, for example, 3 bits.

  If the image data stored in the storage element 56 is similar to the previous image data already stored and there are many common parts, only the difference data of these image data can be stored in the storage element 56. Thus, the amount of rewriting of image data can be reduced, and the power consumption required for rewriting can be reduced accordingly.

  Furthermore, in the above embodiment, the present invention is applied to a method of switching and displaying an image in synchronization with the rotation angle on a rotating self-luminous two-dimensional display, but the two-dimensional display moves at high speed, The organic EL panel is a two-dimensional display that moves at high speed by applying the present invention to a device that displays a three-dimensional image by a method of displaying a two-dimensional cross-sectional image on the two-dimensional display in synchronization with the moving distance. As a result, a practical three-dimensional image can be displayed.

  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 one 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. 4 is a circuit diagram showing a configuration of a write gate signal line drive circuit 86 shown in FIG. 3. FIG. 4 is a circuit diagram showing a configuration of a source signal line drive circuit 84 shown in FIG. 3. FIG. 4 is a circuit diagram showing a configuration of a display gate signal line driving circuit 88 shown in FIG. 3. FIG. 3 is a circuit diagram illustrating a circuit configuration of a pixel 90 configuring the display unit 82 illustrated in FIG. 2. It is sectional drawing which showed the structure of the organic EL element 62 which comprises the pixel 90 of the display part of the organic EL panel shown in FIG. 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 the schematic diagram which showed the structural example of the cross-sectional image data input into the display part 82 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 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 ... pedestal, 6 ... rotating plate, 8 ... 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 ... expansion 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 drive Transistor (TFT), 62 ... Organic EL element, 64 ... Power supply line, 66 ... Light transmissive cathode, 68 ... Metal anode, 70 ... Organic light emitting layer, 72 ... Glass substrate, 74 ... Magnet, 7 ...... Receiving coil, 78 .. axis, 82... Display section, 84... Source signal line driving circuit, 86... Writing gate signal line driving circuit, 88. ... Pixel, 92, 94, 98, 160 ... Shift register (SR), 96 ... Transistor group, 126 ... Protection layer, 128 ... Transparent seal, 152, 154 ... Latch (LAT), X ... Insertion gate signal line, Y ... Display gate signal line.

Claims (7)

A three-dimensional image display device for displaying a three-dimensional image as a set of the two-dimensional images by switching and displaying a two-dimensional image in synchronization with the rotation angle on a rotating self-luminous two-dimensional display panel,
The two-dimensional display panel includes storage means for storing image data of the two-dimensional image;
Display means for reading the image data from the storage means in synchronization with the rotation of the two-dimensional display panel, and displaying a two-dimensional image corresponding to the read image data on the display unit of the two-dimensional display panel;
A three-dimensional image display device comprising:   The three-dimensional image display device according to claim 1, wherein the storage unit includes a storage element that stores image data for each pixel constituting the display unit.   When the rotational resolution of the three-dimensional image is N, the storage means has N storage elements, and the display means reads the image data every time the two-dimensional display panel rotates 360 degrees / N. The three-dimensional image display device according to claim 2, wherein the storage element is switched.   4. The three-dimensional image display device according to claim 1, wherein the storage unit stores image data corresponding to the two-dimensional image for one rotation of the two-dimensional display panel.   2. The three-dimensional image display device according to claim 1, further comprising display shift control means for shifting the display position of the three-dimensional image in the rotational direction of the two-dimensional display panel or in the opposite direction.   The display shift control means performs control to shift a timing for displaying an image corresponding to image data read from the storage means in synchronization with rotation of the two-dimensional display panel on the display unit by 360 degrees / N. The three-dimensional image display apparatus according to claim 5. 2. The three-dimensional image display device according to claim 1, wherein the self-luminous two-dimensional display panel is an organic electroluminescence panel.

Images