JP5279795B2 - Autostereoscopic display device - Google Patents

Description

  The present invention relates to an autostereoscopic display device capable of visually recognizing a stereoscopic image with the naked eye without wearing special glasses.

  As an autostereoscopic display device capable of visually recognizing a stereo image without wearing special glasses, for example, there are an apparatus using a lenticular lens and an apparatus using a parallax barrier.

  Conventionally, it has a plurality of color individually specifiable display elements arranged in an array of rows and columns and a light directing means such as a lenticular sheet having a plurality of light directing elements such as lenticular elements. There is disclosed an autostereoscopic display device in which the order of colors is different for at least one of the row direction and the column direction for different triplets (for example, Patent Document 1). reference).

  In addition, a display panel in which a plurality of display pixels composed of M × N (M and N are natural numbers) sub-pixels for N viewpoints are arranged in a matrix, and a lenticular lens that distributes the light beams of the sub pixels for each viewpoint. And an M × N sub-pixel included in one display pixel is formed in a square area (for example, see Patent Document 2). .

Special table 2008-537160 gazette Japanese Patent No. 4400172

  However, when a conventional autostereoscopic display device using a parallax barrier or a lenticular lens is enlarged, the pixels are large and the observation distance is as long as several meters, so the distance between the display pixel and the parallax barrier or the surface of the display pixel and the lenticular lens The distance (that is, the thickness of the lenticular lens) increases, and the entire display device becomes thick and heavy. Further, since the thickness of the lenticular lens is increased, there is a problem that the manufacturing of the display device becomes complicated, for example, a mechanism for holding the lenticular lens is required.

  The present invention has been made to solve these problems, and an object thereof is to provide an autostereoscopic display device capable of reducing the weight of the entire display device and simplifying the structure.

In order to solve the above problems, an autostereoscopic display device according to the present invention has a plurality of pixels arranged according to a predetermined pixel arrangement, and each pixel is composed of a plurality of sub-pixels, and a display unit. Each of the sub-pixels includes a plurality of vertically long parallax image sub-pixels corresponding to each viewpoint of the parallax image arranged in parallel in the horizontal direction. formed Te, in each sub-pixel, the parallax image sub-pixels arranged to correspond to a set of perspectives visual difference image becomes a set, the set of the parallax image sub pixels are arranged in a predetermined cycle, parallax division The means includes a dividing element arranged for each set of parallax image sub-pixels corresponding to a predetermined period, and in each sub-pixel, the parallax image sub-pixels corresponding to the same viewpoint of the parallax image are connected to each other by a connection wiring. Specially connected To.

According to the present invention, each sub-pixel, the parallax image subpixels portrait corresponding to each viewpoint of the parallax image is formed a plurality arranged laterally, in each sub-pixel, a set of viewpoint viewing difference image parallax image sub-pixels arranged to correspond to become set, the set of the parallax image sub pixels are arranged in a predetermined cycle, parallax dividing means, each set of the parallax image sub-pixel corresponding to a predetermined period comprising a dividing element which is arranged, in each sub-pixel, the parallax image sub-pixel corresponding to the same viewpoint parallax images are to be connected by the connecting wires to each other, the simplification of the weight and structure of the entire display device It becomes possible.

It is a figure which shows the structure of the pixel of the autostereoscopic display apparatus by Embodiment 1 of this invention. It is a figure which shows the positional relationship of a pixel and a lenticular lens. It is a figure which shows the structure of the pixel of the 4 eye type autostereoscopic display apparatus by Embodiment 1 of this invention. It is a figure which shows the structure of the pixel of the autostereoscopic display apparatus by Embodiment 2 of this invention. It is a figure which shows the stereoscopic viewing area of the autostereoscopic display apparatus by Embodiment 2 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>
The autostereoscopic display device according to the present embodiment will be described on the assumption that a display panel (display means) having simple matrix organic EL (Electro Luminescence) pixels is used. The display panel has a plurality of pixels arranged according to a stripe arrangement, and each pixel is composed of a plurality of sub-pixels. In FIG. 1, the pixel 10 is shown as a sub-pixel, and the plurality of pixels 10 constitute one pixel. The arrangement of the pixels 10 may be, for example, RGB side by side or delta arrangement.

  FIG. 1 is a diagram showing a configuration of a pixel 10 of an autostereoscopic display device according to Embodiment 1 of the present invention. As shown in FIG. 1, the pixel 10 is disposed at the intersection of the vertical wiring 20 and the horizontal wiring 30. The pixel 10 has a vertically long first view pixel 11 (first parallax image sub-pixel) and second view pixel 12 (second parallax image sub-pixel) corresponding to each viewpoint (two viewpoints) of the parallax image in the horizontal direction. A plurality of the first VIEW pixels 11 and the second VIEW pixels 12 are set as a set, and a predetermined number (5 sets in FIG. 1) is arranged. That is, the first VIEW pixel 11 and the second VIEW pixel 12 are arranged in a predetermined cycle with the first VIEW pixel 11 and the second VIEW pixel 12 arranged corresponding to one set of viewpoints of the parallax image as a set. In the pixel 10 of FIG. 1, five sets (five sets) of the first VIEW pixel 11 and the second VIEW pixel 12 are arranged, but the number is not limited to five and any number of sets may be arranged.

  The plurality of first view pixels 11 are connected by a connection wiring 21 (first connection wiring) and connected to a vertical wiring 20 (first vertical wiring), and the plurality of second view pixels 12 are connected to a connection wiring 22 ( Are connected by the second connection wiring) and connected to the vertical wiring 20 (second vertical wiring). That is, the vertical wiring 20 is disposed along both ends of the pixels 10 arranged in the vertical direction, and is connected to the connection wirings 21 and 22, respectively. Accordingly, the same voltage is simultaneously applied to the plurality of first view pixels 11 and the plurality of second view pixels 12 respectively. When displaying an image, by applying a voltage to each of the vertical wiring 20 and the horizontal wiring 30, the pixel 10 disposed at the intersection of the vertical wiring 20 and the horizontal wiring 30 to which the voltage is applied emits light. That is, since the first VIEW pixel 11 is connected by the connecting line 21, it emits a single color (same color) having the same gradation brightness, and the second VIEW pixel 12 is connected by the connecting line 22 and thus has the same color. In order to emit (single color), the pixels 10 constituting the first VIEW pixel 11 and the second VIEW pixel 12 emit a single color as a whole (the first VIEW pixel 11 and the second VIEW pixel 12 emit the same color). When performing color display using spatial color mixing, for example, the upper left pixel 10 in FIG. 1 may be arranged to emit red (R), and the upper right pixel 10 may emit green (G).

  The connection wiring 21 that connects the plurality of first view pixels 11 is wired from the lower end side of the pixel 10 (the lower side in the drawing of FIG. 1), and the connection wiring 22 that connects the plurality of second view pixels 12 is connected to the pixel 10. Since the first VIEW pixel 11 and the second VIEW pixel 12 do not cross each other on the plane of one substrate, an arbitrary number of first VIEWs are provided. A pixel 11 and a second VIEW pixel 12 can be formed, respectively. That is, the first VIEW pixels 11 (second VIEW pixels 12) corresponding to the same viewpoint of the parallax image are connected to each other by the connection wiring 21 (connection wiring 22).

  A lenticular lens 40 (parallax dividing means) is disposed on the display surface side of the pixel 10. The pitch (width) of one convex portion (cylindrical lens (dividing element)) constituting the lenticular lens 40 is about the sum of the width of one first VIEW pixel 11 and the width of one second VIEW pixel 12, and the focal point The position is on the display surface of the first VIEW pixel 11 and the second VIEW pixel 12. That is, the cylindrical lens (dividing element) is arranged corresponding to each set of the first VIEW pixel 11 and the second VIEW pixel 12 described above. The light emitted from the plurality of first VIEW pixels 11 by the action of the lenticular lens 40 passes through the lenticular lens 40 toward the right eye of the observer, and the light emitted from the plurality of second VIEW pixels 12 is It passes through the lenticular lens 40 toward the viewer's left eye. That is, the first VIEW pixel 11 forms a parallax image for the right eye, and the second VIEW pixel 12 forms a parallax image for the left eye. In this way, by simultaneously displaying the right-eye image and the left-eye image on each of the first VIEW pixel 11 and the second VIEW pixel 12, the observer has a stereoscopic image (stereoscopic image without wearing special glasses). ).

FIG. 2 is a diagram illustrating a positional relationship between the pixel 10 and the lenticular lens 40 in a large-sized autostereoscopic display device. As shown in FIG. 2, the light emitted from each of the first VIEW pixels 11 constituting the pixel 10 passes through the cylindrical lens (convex portion) of the lenticular lens 40 toward the right eye of the observer. The light emitted from each of the second VIEW pixels 12 passes through the cylindrical lens of the lenticular lens 40 toward the left eye of the observer. When LL is the distance from the pixel 10 to the surface of the lenticular lens 40, L is the viewing distance, PP is the inter-pixel distance between the first VIEW pixel 11 and the second VIEW pixel 12, and IPD is the interocular distance, LL is expressed by the following formula ( 1).
LL = L · PP / IPD (1)

  In Expression (1), for example, when L = 10 m, IPD = 65 mm, and PP = 4 mm, LL is about 60 cm. That is, it is necessary to install a lenticular lens 40 having a thickness of 60 cm in front of the pixel 10. However, when the lenticular lens 40 having a thickness of 60 cm is installed, the thickness of the whole autostereoscopic display device is increased, and the strength for fixing the lenticular lens 40 must be secured. It is difficult to install the autostereoscopic display device.

  As a countermeasure for such a problem, if the LL is about 3 cm, which is 1/20 of the above (60 cm), the lenticular lens 40 can be installed in a large autostereoscopic display device, and the thickness of the display device can be reduced. Can be small. For that purpose, it is desirable to set PP to about 0.2 mm which is 1/20 of the above (4 mm) based on the formula (1). However, when PP is about 0.2 mm, the following problems occur.

  In general, the pixel 10, the vertical wiring 20, and the horizontal wiring 30 are formed on a glass substrate. In order to send an electrical signal to the pixel 10, a flexible printed circuit (FPC) wiring that transmits a signal from a driving circuit (not shown), a vertical wiring 20 and a horizontal wiring 30 of a glass substrate are provided. Bonding is performed using solder or the like at the edge of the glass substrate. At this time, if the widths of the first VIEW pixel 11 and the second VIEW pixel 12 are reduced without the connection wirings 21 and 22 shown in FIG. 1, the number of vertical wirings connected to each of the first VIEW pixel 11 and the second VIEW pixel 12 is reduced. This increases, and the pitch of the wiring at the edge of the glass substrate becomes small, so that it becomes difficult to join the FPC with the wiring, and the yield of mass production decreases. Further, even when the size of the pixel 10 is reduced by reducing the width of the first VIEW pixel 11 and the second VIEW pixel 12, the resolution of the image content to be displayed is determined. Therefore, the same pixel data is stored in a plurality of pixels (first view). It is necessary to write to the pixel 11 and the second VIEW pixel 12). Accordingly, the time for applying a voltage per pixel (first VIEW pixel 11 and second VIEW pixel 12) is shortened, and high-luminance image display cannot be performed.

  In the autostereoscopic display device according to the first embodiment, as shown in FIG. 1, the first VIEW pixels 11 and the second VIEW pixels 12 are alternately arranged, and the plurality of first VIEW pixels 11 are connected by a connection wiring 21. The plurality of second view pixels 12 are connected by a connection wiring 22 and connected to the vertical wiring 20. Therefore, the width of the first VIEW pixel 11 and the second VIEW pixel 12 can be reduced without increasing the number of the vertical wirings 20 and the horizontal wirings 30 (that is, PP in FIG. 2 can be reduced). In addition, since a voltage can be simultaneously applied to each of the plurality of first VIEW pixels 11 and the plurality of second VIEW pixels 12, the time during which the voltage is applied to each of the first VIEW pixel 11 and the second VIEW pixel 12 is long. Therefore, it is possible to realize a high-luminance image (parallax image) display.

  From the above, according to the first embodiment, since the thickness of the lenticular lens 40 can be significantly reduced, the entire display device can be reduced in weight and the structure can be simplified.

  In the above description, the case where the driving method is a simple matrix wiring is taken as an example. However, the present invention is not limited to this, and in the segment driving method, the horizontal wiring 30 is a gate line and the vertical wiring 20 is a source line at the intersection of each line. A configuration in which a transistor is provided and a drain is connected to the connection wiring 22 can also be applied in the same manner as described above.

  FIG. 3 is a diagram illustrating a pixel configuration of the four-eye autostereoscopic display device according to the first embodiment of the present invention. In FIG. 3, the vertical wiring and the horizontal wiring are not shown. In FIG. 1, a two-eye (2VIEW type) autostereoscopic display device has been described as an example. However, in the four-eye (4VIEW type) autostereoscopic display device illustrated in FIG. 3, the pixel 10 corresponds to four viewpoints. The vertically long first VIEW pixel 11 (third parallax image sub-pixel), second VIEW pixel 12 (fourth parallax image sub-pixel), third VIEW pixel 13 (fifth parallax image sub-pixel), and fourth VIEW pixel 14 (first 6 parallax image sub-pixels) are arranged side by side in the horizontal direction. Each one of the first VIEW pixel 11, the second VIEW pixel 12, the third VIEW pixel 13, and the fourth VIEW pixel 14 is a set, and a predetermined number of sets (three sets in FIG. 3) is arranged. In the pixel 10 of FIG. 3, three sets (three sets) of the first VIEW pixel 11, the second VIEW pixel 12, the third VIEW pixel 13, and the fourth VIEW pixel 14 are arranged. The number of pairs may be arranged.

  The plurality of first view pixels 11 are connected by a connection wiring 21 and connected to a vertical wiring (not shown), and the plurality of second view pixels 12 are connected by a connection wiring 22 and connected to a vertical wiring (not shown). The plurality of third view pixels 13 are connected by a connection wiring 23 and connected to a vertical wiring (not shown), and the plurality of fourth view pixels 14 are connected by a connection wiring 24 and connected to a vertical wiring (not shown). Has been.

  A lenticular lens 40 (parallax dividing means) is disposed on the display surface side of the pixel 10, and one cylindrical is provided for each set of the first VIEW pixel 11, the second VIEW pixel 12, the third VIEW pixel 13, and the fourth VIEW pixel 14. A lens (dividing element) is arranged.

  From the above, even in a four-eye type naked eye display device, by providing the connection wires 21 to 24, the thickness of the lenticular lens 40 can be greatly reduced regardless of the wiring route of the connection wires 21 to 24. Therefore, the entire display device can be reduced in weight and the structure can be simplified.

<Embodiment 2>
FIG. 4 is a diagram showing a pixel configuration of the autostereoscopic display device according to the second embodiment of the present invention. As shown in FIG. 4, the pixel 10 is disposed at the intersection of the vertical wiring 20 and the horizontal wiring 30. The pixel 10 forms the pixel 10 by arranging a plurality of the first VIEW pixel 11, the second VIEW pixel 12, and the mixed VIEW pixel 19 side by side. The mixed VIEW pixel 19 is formed by arranging the two first VIEW pixels 11 and the second VIEW pixels 12 in the vertical direction between two adjacent first VIEW pixels 11 and second VIEW pixels 12 corresponding to different viewpoints. In the pixel 10 of FIG. 4, five sets (five sets) of the first view pixel 11, the second view pixel 12, and the mixed view pixel 19 are arranged, but the number is not limited to five, and an arbitrary number of sets is arranged. May be.

  Further, each of the first VIEW pixel 11, the second VIEW pixel, and the mixed VIEW pixel 19 is set as one set, and the lenticular lens 40 (parallax dividing unit) corresponds to one cylindrical lens (dividing element) per set. As described above, the pixel 10 is disposed on the display surface side.

  The plurality of first view pixels 11 are connected by a connection wiring 21 and connected to the vertical wiring 20, and the plurality of second view pixels 12 are connected by a connection wiring 22 and connected to the vertical wiring 20. Further, the same voltage as that of the first VIEW pixel 11 is applied to the same pixel region as that of the first VIEW pixel 11 in the mixed VIEW pixel 19, and the same pixel region as that of the second VIEW pixel 12 in the mixed VIEW pixel 19 is applied to the second VIEW pixel 11. The same voltage as that of the 2VIEW pixel 12 is applied.

  FIG. 5 is a diagram illustrating a stereoscopic viewing area (a stereoscopic viewable area) of the autostereoscopic display device according to the second embodiment of the present invention. As shown in FIG. 5, since an image (mixed image) by the mixed VIEW pixels 19 is displayed at the viewing angle at which reverse viewing occurs (that is, the reverse viewing region), the viewer can visually recognize the mixed image in one eye. . Therefore, since the observer can recognize that the position where the mixed image is seen by one eye is the reverse viewing region, the observer's visual burden can be reduced.

  From the above, by forming the mixed VIEW pixel 19 in the pixel 10, it is possible to prevent the viewer from visually recognizing the reverse viewing region, and to reduce the burden of visual recognition of the viewer.

  In the present embodiment, the autostereoscopic display device using the lenticular lens as the parallax dividing unit has been described. However, the autostereoscopic display device using the parallax barrier can also be applied.

  In addition, here, a description has been given using a display panel (display means) having a simple matrix type organic EL (Electro Luminescence) pixel. However, the present invention is not limited to this, and addressing by vertical wiring and horizontal wiring. Any display panel including light emitting pixels can be applied.

  In the present embodiment, the pixel 10 array is described as a stripe type. However, even if the pixel 10 array is a delta type, it can be applied by devising wiring.

  10 pixels, 11 1st VIEW pixels, 12 2nd VIEW pixels, 13 3rd VIEW pixels, 14 4th VIEW pixels, 19 mixed VIEW pixels, 20 vertical wirings, 21, 22, 23, 24 connecting wirings, 30 horizontal wirings, 40 lenticular lenses.

Claims (8)

Display means comprising a plurality of pixels arranged according to a predetermined pixel arrangement, each pixel comprising a plurality of sub-pixels;
Parallax dividing means arranged on the display surface side of the display means;
An autostereoscopic display device comprising:
Each of the sub-pixels is formed by arranging a plurality of vertically long parallax image sub-pixels corresponding to each viewpoint of the parallax image in the horizontal direction,
In each said sub-pixel, the parallax image sub-pixels arranged to correspond to a set of perspectives visual difference image becomes a set, the set of the parallax image sub pixels are arranged in a predetermined cycle,
The parallax dividing unit includes a dividing element arranged for each set of the parallax image sub-pixels corresponding to the predetermined period,
In each of the sub-pixels, the parallax image sub-pixels corresponding to the same viewpoint of the parallax image are connected to each other by a connection wiring.   The autostereoscopic display device according to claim 1, wherein the set of the parallax image sub-pixels includes a first parallax image sub-pixel and a second parallax image sub-pixel corresponding to two viewpoints. .   The first connection wiring that connects the first parallax image subpixels and the second connection wiring that connects the second parallax image subpixels are divided into an upper end side and a lower end side of the subpixels. The autostereoscopic display device according to claim 2, wherein the autostereoscopic display device is arranged. The predetermined pixel array is a stripe array, and is disposed along both lateral ends of the sub-pixels arranged in the vertical direction, and is connected to the first and second connection wirings, respectively. The autostereoscopic display device according to claim 3, further comprising a vertical wiring.   The set of the parallax image sub-pixels includes a third parallax image sub-pixel corresponding to four viewpoints, a fourth parallax image sub-pixel, a fifth parallax image sub-pixel, and a sixth parallax image sub-pixel. The autostereoscopic display device according to claim 1, wherein: Each said sub-pixel, between the set of the parallax image sub-pixel, and wherein the Rukoto comprises a mixed pixels formed by arranging two parallax images subfraction containing that corresponds to different viewpoints in the vertical direction The autostereoscopic display device according to claim 1.   The autostereoscopic display device according to claim 1, wherein the parallax dividing unit is a lenticular lens, and the dividing element corresponds to each convex portion of the lenticular lens.   The autostereoscopic display device according to claim 1, wherein the parallax image sub-pixel is an organic EL (Electro Luminescence) pixel.

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