JP2016046645A - Stereoscopic video display device, manufacturing method thereof, and positional displacement adjusting device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positional displacement adjusting device capable of accurately adjusting positions of a film and a lens array while taking elongation/contraction of the film into account.SOLUTION: A positional displacement adjusting device 100 includes: an imaging apparatus 110 for imaging a film 20 and a lens array 30 in which a line pattern for adjustment is overlapped on a plurality of element images; enlargement discrimination means 121 for discriminating whether the line pattern for adjustment is enlarged in an element lens included in a captured image; imaging position control means 123 by which, in the case where the line pattern for adjustment is not enlarged, the imaging apparatus 110 and the enlargement discrimination means 121 are made execute processing again; positional displacement calculation means 125 by which, in the case where the line pattern for adjustment is enlarged, a positional displacement direction and a positional displacement amount between the film 20 and the lens array 30 are calculated; and positional displacement adjusting means 127 for moving the film 20 on the basis of the positional displacement direction and the positional displacement amount.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a stereoscopic image display apparatus including a printing member on which an element image is printed and a lens array in which element lenses are two-dimensionally arranged, a manufacturing method thereof, and a positional deviation adjustment apparatus thereof.

  In the conventional integral photography (IP) method, a subject is imaged through a lens array in which a plurality of microlenses are arranged with one camera. At this time, since the camera captures an image of the focal plane of the lens array, each minute lens constituting the lens array functions in the same manner as the minute camera. As a result, an image obtained by imaging the subject through the lens array becomes an element image group in which minute images (element images) corresponding to the positions of the minute lenses are arranged. This elemental image group is an image in which light information from a subject is recorded, and the number of light rays that can be recorded depends on the resolution of the camera.

  In a conventional camera, a technique for correcting geometric distortion including distortion due to chromatic aberration of an imaging lens has been proposed (Non-Patent Document 1). In the technique described in Non-Patent Document 1, a measurement pattern in which black and white patterns are regularly arranged (for example, a chessboard pattern) or a lattice-like measurement pattern displayed at regular intervals is used. The technique described in Non-Patent Document 1 captures the range from the center to the end of the imaging lens with each RGB image sensor using the point at which the vertex of the black and white pattern is adjacent or the intersection of the grid as the measurement point, The geometric distortion is corrected so that the measurement points are arranged in a straight line. In short, in the technique described in Non-Patent Document 1, geometric distortion including distortion due to chromatic aberration is corrected using a known measurement pattern.

  The geometric distortion of the optical system is one of the causes of misalignment. For this reason, the degradation of the reproduced stereoscopic video is increased due to the geometric distortion. Therefore, an invention for correcting the positional deviation of the stereoscopic imaging device has also been proposed in the IP system (Patent Document 1). The invention described in Patent Document 1 detects the position of each element lens in the imaging system lens array and the display system lens array, and displays the position of each element image of the captured image captured by the stereoscopic imaging device. Correction is performed in accordance with the position of the element lens of the array.

  The technique described in Non-Patent Document 1 can also be applied when a projector is used as a display device. In this case, the projector displays a known measurement pattern, and the camera without distortion re-images the measurement pattern. Then, a measurement pattern as designed can be displayed by detecting and correcting the misalignment of the display image of the projector from the re-captured image.

  The invention described in Patent Document 1 can also be applied to a direct-view electronic display. In this case, since distortion due to the electronic display is unlikely to occur, it is used to correct the display position in accordance with the arrangement error of the display system lens array. In other words, once a stereoscopic display device in which a display system lens array and an electronic display are joined is manufactured, the misalignment between the display system lens array and the electronic display cannot be corrected. To correct the image on the electronic display.

  Here, the resolution of the IP stereoscopic video depends on the pixel interval of the display image. Therefore, in the IP method, it is possible to display a high-quality stereoscopic image as the pixel interval is narrower. In IP, a method using film video is known as a method capable of expressing video with higher definition than electronic displays and projectors.

  24 and 25, the conventional IP stereoscopic image display panel 900 includes a lens array 930 in which an acrylic plate 910 that protects a film 920, a film 920 on which an element image 922 is drawn, and element lenses 932 are arranged. With.

Hereinafter, the manufacture of the IP stereoscopic image display panel 900 will be briefly described.
On the film 920 and the lens array 930, adjustment patterns 940A and 940B are printed in order to adjust the positions of the film 920 and the lens array 930. Specifically, on the film 920, a cross-shaped adjustment pattern (adjustment cross pattern) 940A is printed at four corners. The lens array 930 has four adjustment patterns (adjustment square patterns) 940 </ b> B printed at four corners of the lens surface on which the element lens 932 is formed.

  The IP stereoscopic image display panel 900 adjusts the positions of the film 920 and the lens array 930 using the adjustment patterns 940A and 940B, and bonds the film 920 and the lens array 930 together with an adhesive.

  Here, the case where the film 920 and the lens array 930 are the same size is considered. In this case, if the positions of the film 920 and the lens array 930 coincide with each other, the adjustment cross pattern 940A fits in the gap between the adjustment square patterns 940B. That is, in the IP stereoscopic video display panel 900, the film 920 and the lens array 930 can be bonded so that no positional deviation occurs with reference to the adjustment patterns 940A and 940B.

JP 2004-336239 A

`` A flexible new technique for camera calibration '', http://opencv.jp/sample/camera_calibration.html, IEEE Transactions on Pattern Analysis and Machine Intelligence, 22 (11), 1330-1334, 2000.

  However, unlike a solid-state device such as an electronic display, the film 920 may be physically expanded and contracted by heat or the like. Due to the expansion and contraction of the film 920, the adjustment pattern 940A may be displaced from the original position as shown in FIG. In this case, it is difficult to completely match the adjustment patterns 940A and 940B (the cross of the adjustment pattern 940A is placed in the square gap of the adjustment pattern 940B).

Consider a case where the upper right adjustment patterns 940A and 940B are made to coincide in a state where the film 920 is stretched as shown in FIG. In this case, even if the upper right adjustment patterns 940A and 940B are matched, the remaining adjustment patterns 940A and 940B do not match. That is, a large positional shift occurs on the film 920 and the lens array 930 as a whole.
In FIG. 27, the film 920 is shown by a broken line in order to make the drawing easy to see.

  Since the amount of expansion / contraction of each film 920 is different, even if a plurality of films 920 are printed at the same time, they are not necessarily equal. Therefore, it is difficult to apply the techniques described in Patent Literature 1 and Non-Patent Literature 1 to the IP stereoscopic video display panel 900.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a stereoscopic image display device that can accurately adjust the positions of a printing member and a lens array in consideration of expansion and contraction of the printing member, a manufacturing method thereof, and a positional deviation adjustment device thereof.

  In view of the above-described problems, the manufacturing method according to the first invention of the present application is a manufacturing method of a stereoscopic image display device including a printing member on which an element image is printed and a lens array in which element lenses are two-dimensionally arranged. Then, the imaging process, the determination process, the imaging position control process, the positional deviation calculation process, and the adjustment process are executed in order.

  According to such a procedure, the manufacturing method generates a captured image by capturing a printing member and a lens array in which an adjustment line pattern is superimposed on a plurality of element images from a predetermined imaging position in an imaging step. To do.

  Here, on the axis passing through the adjustment line pattern and the principal point of the element lens, the adjustment line pattern is enlarged by the element lens. Therefore, the imaging position is set in advance to a position where the adjustment line pattern enlarged by the element lens can be imaged when there is no positional deviation between the printing member and the lens array and the printing member is not expanded or contracted (initial setting). To do.

  Accordingly, when the adjustment line pattern is enlarged by the element lens at the initially set imaging position, it can be said that there is no positional deviation between the printing member and the lens array. On the other hand, if the adjustment line pattern is not enlarged by the element lens at the initially set imaging position, it can be said that there is a positional deviation between the printing member and the lens array.

  In view of this, in the determination step, the manufacturing method determines whether or not the adjustment line pattern is enlarged by the element lens included in the captured image. At this time, whether or not the adjustment line pattern is enlarged is clearly shown in the captured image, so that the determination accuracy in the determination step is improved.

  In the imaging position control process, when the adjustment line pattern is not enlarged, the manufacturing method moves the imaging position and re-executes the imaging process and the determination process. That is, in the manufacturing method, the imaging process, the determination process, and the imaging position control process are performed from the initially set imaging position until the imaging position reaches an axis passing through the adjustment line pattern and the principal point of the element lens. Repeat the process.

  Here, when there is a positional deviation between the printing member and the lens array, the imaging position moves from the initial position. That is, the positional deviation direction and the positional deviation amount between the printing member and the lens array can be obtained from the moving direction and the movement amount of the imaging position.

  Therefore, the manufacturing method calculates the positional shift direction and the positional shift amount between the printing member and the lens array when the adjustment line pattern is enlarged in the positional shift calculation step. Then, in the adjustment process, either one of the printing member and the lens array is moved based on the positional shift direction and the positional shift amount calculated in the positional shift calculation process.

  The misregistration adjustment apparatus according to the second invention of the present application is a misregistration adjustment apparatus for a stereoscopic image display apparatus including a printing member on which an element image is printed and a lens array in which element lenses are two-dimensionally arranged. The first imaging means, the first moving means, the determining means, the imaging position control means, the positional deviation calculating means, the second moving means, and the adjusting means are provided.

  According to such a configuration, the positional deviation adjusting device captures the first image pickup unit from the predetermined image pickup position by imaging the printing member and the lens array in which the adjustment line pattern is superimposed on the plurality of element images. One captured image is generated.

  The position deviation adjusting device moves the imaging position of the first imaging means by the first moving means. Then, the misalignment adjusting apparatus determines whether or not the adjustment line pattern is enlarged by the element lens included in the first captured image by the determination unit. At this time, whether or not the adjustment line pattern is enlarged is clearly shown in the first captured image, so that the determination accuracy in the determination unit is improved.

  When the adjustment line pattern is not enlarged by the imaging position control unit, the positional deviation adjusting device moves the imaging position to the first moving unit and causes the first imaging unit and the determining unit to re-execute the processing. That is, the positional deviation adjusting device includes the first imaging unit, the determination unit, and the imaging position from the initially set imaging position until the imaging position reaches an axis that passes through the adjustment line pattern and the principal point of the element lens. Repeat the process with the control means.

  The misregistration adjusting device calculates the misregistration direction and the misregistration amount between the printing member and the lens array when the adjustment line pattern is enlarged by the misregistration calculation means. Then, the misregistration adjustment apparatus moves either the printing member or the lens array by the second moving unit. Further, in the misalignment adjusting apparatus, the adjusting unit moves either the printing member or the lens array to the second moving unit based on the misalignment direction and the misalignment amount calculated by the misalignment calculating unit.

  A manufacturing method according to the third invention of the present application is a manufacturing method of a stereoscopic image display device including a printing member on which an element image is printed and a lens array in which element lenses are two-dimensionally arranged, and includes an imaging step. And a detection process, a positional deviation calculation process, and an adjustment process are executed in order.

  According to this procedure, in the imaging process, the manufacturing method includes a printing member on which an adjustment rectangular pattern surrounding all element images is printed, and a lens array on which an adjustment rectangular pattern surrounding all element lenses is printed. The captured image is generated by imaging.

  In the manufacturing method, an adjustment rectangular pattern printed on the printing member and the lens array is detected from the captured image by the detection step. Since many detection references serving as references for detecting the adjustment rectangular pattern in the detection process are provided on the four sides of the adjustment rectangular pattern, the detection accuracy in the detection process is improved.

  In the manufacturing method, the positional deviation calculation step calculates the positional deviation amount of the adjustment rectangular pattern between the printing member and the lens array detected in the detection step. Then, in the adjustment process, either one of the printing member and the lens array is moved to a position where the amount of misregistration calculated in the misregistration calculation step is minimized.

  The misregistration adjusting apparatus according to the fourth aspect of the present invention is a misregistration adjusting apparatus for a stereoscopic image display apparatus including a printing member on which an element image is printed and a lens array in which element lenses are arranged two-dimensionally. In addition, the image processing apparatus includes an imaging unit, a moving unit, a detecting unit, a positional deviation calculating unit, and an adjusting unit.

  According to such a configuration, the positional deviation adjusting device includes a printing member on which an adjustment rectangular pattern surrounding all element images is printed and a lens array on which an adjustment rectangular pattern surrounding all element lenses is printed by the imaging unit. Are captured to generate a captured image. Then, the misalignment adjusting apparatus moves either the printing member or the lens array by the moving unit.

  In the misalignment adjusting device, the detecting unit detects the adjustment rectangular pattern printed on the printing member and the lens array from the captured image. Since many detection references are provided on the four sides of the adjustment rectangular pattern, the detection accuracy of the detection means is improved.

  The misregistration adjustment device calculates the misregistration amount of the adjustment rectangular pattern between the printing member and the lens array detected by the detection unit by the misregistration calculation unit. In the misalignment adjusting apparatus, the adjusting unit moves either the printing member or the lens array to the position where the misalignment amount calculated by the misalignment calculating unit is minimized.

  A stereoscopic image display device according to the fifth invention of the present application is a stereoscopic image display device including a printing member on which an element image is printed and a lens array in which element lenses are two-dimensionally arranged, and is limited in light transmission. A member is provided.

  According to this configuration, the stereoscopic image display device is disposed on the exit surface side of the lens array by the light transmission limiting member, and transmits light within a predetermined angle range. Thereby, the stereoscopic video display apparatus can prevent the stereoscopic video from the side lobe from being displayed.

  Further, in order to minimize the positional deviation between the printing member and the lens array, the stereoscopic image display apparatus has an adjustment line pattern that overlaps a plurality of element images or an adjustment rectangular pattern that surrounds all the element images. Preferably it is printed.

According to the present invention, the following excellent effects can be obtained.
According to the first and second aspects of the present invention, whether or not the adjustment line pattern is enlarged is clearly shown in the captured image, so that the determination accuracy is improved, and an accurate displacement direction and displacement amount can be calculated. Thus, according to the first and second inventions of the present application, even when the printing member expands and contracts, the positions of the printing member and the lens array can be adjusted with high accuracy, so that the image quality of the stereoscopic image display device can be improved.

According to the third and fourth aspects of the present invention, since many detection references can be provided on the four sides of the adjustment rectangular pattern, the detection accuracy is improved. Therefore, according to the third and fourth inventions of the present application, even when the printing member expands and contracts, the positions of the printing member and the lens array can be adjusted with high accuracy, so that the image quality of the stereoscopic image display apparatus can be improved.
According to the fifth aspect of the present invention, since the stereoscopic video from the side lobe is not displayed, the image quality of the stereoscopic video display device can be improved.

(A) is a side view which shows the structure of the IP stereoscopic video display panel based on 1st Embodiment of this invention, (b) is a side view explaining manufacture of an IP stereoscopic video display panel. It is a front view of the film and lens array of FIG. It is a block diagram which shows the structure of the position shift adjustment apparatus which concerns on 1st Embodiment of this invention. FIG. 4 is an explanatory diagram of the positional deviation adjusting device in FIG. 3, and shows a positional relationship among an imaging position, a principal point of an element lens, and an adjustment pattern when there is no positional deviation. 4A and 4B are explanatory diagrams of the positional deviation adjusting device of FIG. 3, in which FIG. 3A shows a positional relation when there is a positional deviation, and FIG. 3B shows a positional relation after moving the imaging position. It is explanatory drawing explaining calculation of the amount of position shifts by the position shift adjustment apparatus of FIG. It is a flowchart which shows operation | movement of the position shift adjustment apparatus of FIG. It is a front view of the film in the modification 1 of this invention. It is a front view of the film in the modification 2 of this invention. In the modification 2 of this invention, it is explanatory drawing explaining the printing position of the line pattern for adjustment. (A) is a front view of the film and lens array in 2nd Embodiment of this invention, (b) is an enlarged view of the line pattern for adjustment of (a). It is a block diagram which shows the structure of the position shift adjustment apparatus which concerns on 2nd Embodiment of this invention. FIG. 13 is an explanatory diagram of the positional deviation adjusting device in FIG. 12, (a) shows the positional relationship when there is no positional deviation, (b) shows the positional relationship when the positional deviation is one pixel, and (c) shows ( This represents the positional relationship when the position is shifted by one pixel in the opposite direction to b). It is explanatory drawing of the position shift adjustment apparatus of FIG. 12, (a) is a front view of the film and lens array when position shift is carried out in the rotation direction, (b) is a film and lens when there is no position shift. It is a front view of an array. It is a block diagram which shows the structure of the position shift adjustment apparatus which concerns on 3rd Embodiment of this invention. It is a front view of the film and lens array of FIG. It is a block diagram which shows the structure of the position shift adjustment apparatus which concerns on 4th Embodiment of this invention. It is explanatory drawing explaining the modification 3 of this invention. It is a block diagram which shows the structure of the position shift adjustment apparatus which concerns on 5th Embodiment of this invention. It is a front view of the film and lens array of FIG. 19, (a) is a case where there is no expansion-contraction in a film, (b) is a case where it has displaced in the rotation direction, (c) is adjusting a displacement. After. It is a front view of the film and lens array of FIG. 19, (a) is a case where a film has expansion-contraction, (b) is after adjusting a position shift. It is a flowchart which shows operation | movement of the position shift adjustment apparatus of FIG. (A) is a side view which shows the structure of the IP stereoscopic video display panel based on 6th Embodiment of this invention, (b) is a side view explaining manufacture of an IP stereoscopic video display panel. It is a side view which shows the structure of the conventional IP stereoscopic video display panel. It is a front view of the film and lens array of FIG. 24, and represents the case where the film is not expanded and contracted. It is a front view of the film and lens array of FIG. 24, and represents the case where the film is expanding and contracting. It is explanatory drawing explaining adjustment of the position shift in a prior art.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In each embodiment, means having the same function are denoted by the same reference numerals and description thereof is omitted.

(First embodiment)
[Configuration of IP stereoscopic video display panel]
With reference to FIGS. 1 and 2, the configuration of an IP stereoscopic video display panel (stereoscopic video display device) 1 according to the first embodiment of the present invention will be described.
As shown in FIG. 1A, the IP stereoscopic video display panel 1 displays an IP stereoscopic video, and includes an acrylic plate 10, a film (printing member) 20, and a lens array 30.

  The acrylic plate 10 prevents the film 20 from being scratched and the film 20 from being peeled off from the lens array 30 by external pressure. The protective member such as the acrylic plate 10 is not an essential component for the IP stereoscopic image display panel 1.

  The film 20 is obtained by printing (drawing) an IP stereoscopic video (element image group) displayed on the IP stereoscopic video display panel 1. As shown in FIG. 2, the element image 22 having the same position and the same size as the element lens 32 to be described later is printed on the film 20.

  Here, the positions of the film 20 and the lens array 30 are adjusted when the IP stereoscopic image display panel 1 is manufactured. For this reason, the adjustment line pattern 50 is printed on the film 20 so as to overlap the plurality of element images 22. In the present embodiment, the film 20 is printed such that two adjustment line patterns 50 pass through the center of the element image 22 on the outer edge side in the vertical direction and the horizontal direction, respectively. Each adjustment line pattern 50 is a straight line having a width corresponding to one pixel of the film 20 and has a predetermined color (for example, black).

The adjustment line pattern 50 may be printed in the region of the element image 22 and may not be printed in a region other than the element image 22.
The pixel of the film 20 is a dot when the element image 22 is printed on the film 20.

  The lens array 30 includes element lenses 32 arranged in a two-dimensional arrangement such as a delta arrangement or a square arrangement. In the present embodiment, the lens array 30 is a plano-convex lens array in which plano-convex lenses, one of which has a convex lens surface and the other has a flat surface, are arranged in a delta arrangement.

In addition, examples of the lens array 30 include a convex lens array in which convex lenses are arrayed, a concave lens array in which concave lenses are arrayed, and a GRIN lens array in which GRIN lenses (refractive index distribution lenses) having a wavelength of 3/4 period are arrayed. The lens array 30 may be a lenticular lens array in which vertically long lenses are arranged in the horizontal direction. When the lens array 30 is a lenticular lens array, only the vertical adjustment line pattern 50 is printed.
In FIG. 2, 18 element images 22 and 18 element lenses 32 are shown for easy viewing of the drawing, but the number of element images 22 and element lenses 32 is arbitrary.

  As shown in FIG. 1B, the IP stereoscopic image display panel 1 is bonded to the acrylic plate 10 and the film 20, the film 20, and the lens array 30 with an adhesive 40 at the time of manufacture. For example, examples of the adhesive 40 include a light transmissive adhesive such as an ultraviolet curable adhesive.

  Here, the IP stereoscopic image display panel 1 is designed so that the optical distance from the surface where the adhesive 40 contacts the film 20 to the principal point of the element lens 32 and the focal length of the element lens 32 are equal. Then, the IP stereoscopic image display panel 1 bonds the film 20 and the lens array 30 so that the film 20 is positioned at the focal position of the element lens 32. Thus, in the IP stereoscopic image display panel 1, the element lens 32 focuses on infinity, so that the lens array 30 emits parallel light.

  Note that the IP stereoscopic image display panel 1 does not have to place the film 20 at the focal position of the element lens 32. In this case, in the IP stereoscopic image display panel 1, the light converges on the front surface or the back surface of the lens array 30.

<Position shift on IP 3D image display panel>
Hereinafter, a positional shift that occurs in the IP stereoscopic video display panel 1 will be described.
There is a possibility that the IP stereoscopic image display panel 1 is displaced between the acrylic plate 10 and the film 20 or between the film 20 and the lens array 30.

The positional deviation between the film 20 and the lens array 30 affects the image quality and viewing area (a range in which the IP stereoscopic video can be observed) of the IP stereoscopic video.
On the other hand, the positional deviation between the acrylic plate 10 and the film 20 hardly affects the image quality and viewing area of the IP stereoscopic video. Specifically, when the thickness of the adhesive 40 that bonds the acrylic plate 10 and the film 20 is uneven, or when the light transmittance of the acrylic plate 10 is uneven, the brightness of the IP stereoscopic image is uniform. The impact will be minimal.
Therefore, based on the degree of the influence, in this embodiment, attention is paid to the positional deviation between the film 20 and the lens array 30.

  When there is an error in the bonding distance between the film 20 and the lens array 30, the quality of the reproduced stereoscopic video is also affected. For this reason, it is desirable that the bonding distance be constant on the bonding surface. However, in practice, it is difficult to make the bonding distance completely uniform because of surface accuracy of the surface of the lens array 30 and uneven application of the adhesive 40.

  In addition, since the element lens 32 has a permissible circle of confusion, even if there is an error in the bonding distance, if the pixel size of the film 20 is smaller than the permissible circle of confusion, the positional deviation with respect to the image quality of the stereoscopic image is substantially reduced. There is no effect. That is, the presence or absence of the influence of the positional deviation on the image quality of the stereoscopic video is determined by the size of the circle of confusion that the element lens 32 has and the pixel size of the film 20.

The bonding distance is the distance from the flat surface of the lens array 30 to the film 20.
Further, the permissible circle of confusion is a size that allows the region (the circle of confusion) that connects the focal points of the element lenses 32 to be allowed.

  Here, a case where the film 20 and the lens array 30 are displaced in the horizontal direction or the vertical direction on the bonding surfaces of each other is considered. In this case, the IP stereoscopic video is distorted in accordance with the displaced direction. At this time, since the IP stereoscopic video is observed as if it is slightly moved in the direction of displacement when the amount of displacement is small relative to the number of pixels of the element image, the influence of the displacement is small.

  On the other hand, let us consider a state in which the film 20 and the lens array 30 are displaced in the rotational direction on the bonding surfaces of each other. In this case, the IP stereoscopic video is rotated and displayed while its observable range (viewing zone) is narrowed. At this time, the effect of the positional deviation of the IP stereoscopic video increases as the IP stereoscopic video display panel 1 becomes larger or the display position thereof is further away from the lens array 30.

  As described above, the IP stereoscopic video image quality deteriorates as the positional deviation between the film 20 and the lens array 30 increases. Therefore, when manufacturing the IP stereoscopic image display panel 1, it is important to minimize the positional deviation between the film 20 and the lens array 30.

[Configuration of misalignment adjusting device]
With reference to FIG. 3, the configuration of the misalignment adjusting apparatus 100 according to the first embodiment of the present invention will be described (see FIG. 2 as appropriate).
In FIG. 3, the acrylic plate 10 is not shown (the same applies to FIGS. 12, 15, 17, and 19).

  The positional deviation adjusting device 100 is for minimizing the positional deviation between the film 20 and the lens array 30 based on the adjustment line pattern 50 when the IP stereoscopic video display panel 1 is manufactured. As shown in FIG. 3, the positional deviation adjusting device 100 includes an imaging device (first imaging means) 110, a positional deviation calculation device 120, an imaging device stage (first moving means) 130, and a film stage (secondary). Moving means) 140.

  The imaging device 110 generates a captured image (first captured image) by capturing the film 20 and the lens array 30 from a predetermined imaging position. For example, the imaging device 110 includes a general digital camera. Further, the imaging device 110 performs imaging when an imaging command is input from the positional deviation calculation device 120. Then, the imaging device 110 outputs the generated captured image to the positional deviation calculation device 120.

  Here, the imaging device 110 sets the imaging position of the adjustment line pattern 50 enlarged by the element lens 32 when there is no positional deviation between the film 20 and the lens array 30 and the film 20 is not expanded or contracted. It is set in advance (initial setting) at a position where imaging can be performed.

The misregistration calculation device 120 calculates the misregistration amount using the captured image input from the imaging device 110. Here, the positional deviation calculation device 120 outputs a drive signal to the imaging device stage 130 in order to move the imaging position of the imaging device 110. Here, the positional deviation calculation device 120 outputs an imaging command to the imaging device 110 in order to perform imaging at the imaging position after movement. Further, the positional deviation calculation device 120 outputs a drive signal to the film stage 140 in order to adjust the positions of the film 20 and the lens array 30.
Details of the positional deviation calculation device 120 will be described later.

  The imaging device stage 130 moves the imaging position of the imaging device 110 in accordance with the drive signal input from the positional deviation calculation device 120. The imaging device stage 130 includes a pedestal 132 on which the imaging device 110 is placed. The imaging device stage 130 can move the imaging device 110 to an arbitrary imaging position by driving the pedestal 132 in the horizontal direction, the vertical direction, and the depth direction.

  The film stage 140 moves the film 20 in accordance with the drive signal input from the misregistration calculation device 120. The film stage 140 includes a pedestal 142 on which the film 20 is placed. The film stage 140 can drive the pedestal 142 in the horizontal direction, the vertical direction, and the depth direction. Further, the film stage 140 can also rotate the pedestal 142 with the center position (center pixel) of the film 20 as the rotation axis. In this manner, the film stage 140 can move the film 20 to an arbitrary position.

[Configuration of misalignment calculation device]
The positional deviation calculation device 120 includes an enlargement determination unit (determination unit) 121, an imaging position control unit 123, a positional deviation calculation unit 125, and a positional deviation adjustment unit (adjustment unit) 127.

  The enlargement determination unit 121 determines whether or not the adjustment line pattern 50 is enlarged by the element lens 32 included in the captured image from the imaging device 110. The enlargement determination unit 121 performs determination when a determination command is input from an imaging position control unit 123 described later.

Here, when the adjustment line pattern 50 is not enlarged, the enlargement determination unit 121 outputs an imaging position movement command to the imaging position control unit 123.
On the other hand, when the adjustment line pattern 50 is enlarged, the enlargement determination unit 121 outputs a positional deviation calculation command to the positional deviation calculation unit 125.

  When the adjustment line pattern 50 is not enlarged, the imaging position control unit 123 moves the imaging position of the imaging device 110 to the imaging device stage 130 and causes the imaging device 110 and the enlargement determination unit 121 to re-execute processing. It is.

  Specifically, the imaging position control unit 123 outputs a drive signal to the imaging apparatus stage 130 when an imaging position movement command is input from the enlargement determination unit 121. After outputting the drive signal, the imaging position control unit 123 outputs an imaging command to the imaging device 110 and outputs a determination command to the enlargement determination unit 121.

The misregistration calculation unit 125 calculates the misregistration direction and the misregistration amount between the film 20 and the lens array 30.
Specifically, the positional deviation calculation unit 125 calculates a positional deviation direction corresponding to the moving direction of the imaging device 110 when a positional deviation calculation command is input from the enlargement determination unit 121, and the imaging device 110 has a similarity relationship. A displacement amount is calculated from the movement amount. Then, the misregistration calculation unit 125 outputs the calculated misregistration direction and misregistration amount to the misregistration adjustment unit 127.

  The misalignment adjusting unit 127 moves the film 20 to the film stage 140 based on the misalignment direction and the misalignment amount input from the misalignment calculating unit 125. The misalignment adjusting unit 127 generates a drive signal corresponding to the misalignment direction and the misalignment amount, and outputs the drive signal to the film stage 140.

<Position adjustment>
With reference to FIGS. 4 to 6, the position adjustment by the misalignment adjusting apparatus 100 will be specifically described (see FIGS. 1 to 3 as appropriate).
In FIG. 4, it is assumed that the imaging position is initially set on a perpendicular line from the principal point P <b> 1 of the element lens 32. In FIG. 4, it is assumed that there is no positional deviation between the film 20 and the lens array 30.

  As shown in FIG. 4, the adjustment line pattern 50 is printed at the center of the element image 22 (pixels located on the vertical line from the principal point P <b> 1 of the element lens 32). Accordingly, the optical axis of the imaging device 110 passes through the principal point P1 of the element lens 32 and reaches the adjustment line pattern 50. That is, the imaging position, the principal point P1 of the element lens 32, and the adjustment line pattern 50 are positioned on a straight line.

  In this case, the element lens 32 enlarges and displays the adjustment line pattern 50 printed on the element image 22 to the diameter of the element lens 32. Therefore, the imaging apparatus 110 can image the element lens 32 in a state where the adjustment line pattern 50 is enlarged at the initially set imaging position. At this time, it can be said that there is no positional deviation between the film 20 and the lens array 30.

As shown in FIG. 5, when there is a positional deviation between the film 20 and the lens array 30, the positional deviation adjusting device 100 adjusts the position as follows.
The imaging device 110 captures the film 20 and the lens array 30 at the initially set imaging position, and outputs the captured image to the enlargement determination unit 121.

  The enlargement determination unit 121 detects the element lens 32 from the captured image captured at the initially set imaging position. Then, the enlargement determination unit 121 determines whether or not the adjustment line pattern 50 is enlarged on the detected element lens 32. For example, the enlargement determination unit 121 can determine whether or not the adjustment line pattern 50 is enlarged based on whether or not the detected color of the element lens 32 matches the color of the adjustment line pattern 50.

  As illustrated by the alternate long and short dash line in FIG. 5A, the imaging position is not on the axis passing through the adjustment line pattern 50 and the principal point P <b> 1 of the element lens 32. For this reason, in the captured image, the adjustment line pattern 50 is not enlarged on the element lens 32. Accordingly, the enlargement determination unit 121 determines that the adjustment line pattern 50 is not enlarged, and outputs an imaging position movement command to the imaging position control unit 123.

  The imaging position control unit 123 outputs a drive signal to the imaging apparatus stage 130 in response to the imaging position movement command input from the enlargement determination unit 121. Then, the imaging device stage 130 moves the imaging device 110 according to the drive signal.

  The moving range of the imaging position is determined from the exit angle of the element lens 32 and the distance between the principal point P1 of the element lens 32 and the imaging position. Therefore, the imaging position control means 123 may be moved so that raster scanning is performed within the movement range starting from the initially set imaging position. At this time, the imaging position control unit 123 moves the imaging device 110 in the vertical direction and the horizontal direction so that the distance between the imaging device 110 and the film 20 is constant, and does not move in the depth direction.

  Subsequently, the imaging position control unit 123 outputs an imaging command to the imaging device 110. Then, the imaging device 110 captures the film 20 and the lens array 30 at the imaging position after movement in accordance with the imaging command, and outputs the captured image to the enlargement determination unit 121.

  Subsequently, the enlargement determination unit 121 detects the element lens 32 from the captured image captured at the imaging position after movement. Then, the enlargement determination unit 121 determines whether or not the adjustment line pattern 50 is enlarged on the detected element lens 32.

As shown in FIG. 5B, the positional deviation adjusting device 100 includes the imaging device 110 and the enlargement determination unit until the imaging position reaches an axis passing through the adjustment line pattern 50 and the principal point P1 of the element lens 32. The processing of 121 and the imaging position control means 123 is repeated.
In FIG. 5B, the imaging device 110 at the initially set imaging position is indicated by a dotted line.

  In this case, the adjustment line pattern 50 is enlarged on the element lens 32 in the captured image. Therefore, the enlargement determination unit 121 determines that the adjustment line pattern 50 is enlarged, and outputs a positional deviation calculation command to the positional deviation calculation unit 125.

  The positional deviation calculation means 125 calculates the positional deviation direction and the positional deviation amount between the film 20 and the lens array 30 in accordance with this positional deviation calculation command. For example, the misregistration calculation unit 125 calculates a direction opposite to the moving direction D of the imaging device 110 as the misregistration direction D ′.

  Further, as shown in FIG. 6, the misregistration calculation means 125 can calculate the misregistration amount by using the similarities between the triangles P1 to P3 and the triangles P1, P4, and P5. These triangles P <b> 1 to P <b> 3 are right-angled triangles having the principal point P <b> 1 of the element lens 32 as the apex and line segments P <b> 2 and P <b> 3 representing the positional deviation amount d between the film 20 and the lens array 30 as the base. The triangles P1, P4, and P5 are right-angled triangles having the principal point P1 of the element lens 32 as a vertex and line segments P4 and P5 representing the movement amount x of the imaging device 110 as bases.

Here, the focal length f of the element lens 32 and the distance z from the principal point P1 of the element lens 32 to the imaging device 110 are known. Therefore, the positional deviation calculation means 125 calculates the positional deviation amount d from the movement amount x of the imaging device 110 using the following equation (1).
z: f = x: d (1)

  In FIG. 6, the center of the element image 22 is P2, the intersection of the optical axis of the element lens 32 and the element image 22 is P3, and the imaging position when it is determined that the adjustment line pattern 50 is enlarged is P4. The initially set imaging position is P5.

  As described above, the positional deviation calculation unit 125 calculates the positional deviation direction and the positional deviation amount for a certain element image 22. Then, the same procedure as described above is repeated, and the positional deviation calculation unit 125 calculates the positional deviation direction and the positional deviation amount for each element image 22 on which the adjustment line pattern 50 is printed.

  Here, when the film 20 is expanded and contracted, the position shift direction and the position shift amount of each element image 22 may be different. In this case, the positional deviation calculation means 125 calculates the positional deviation direction of the entire film 20 from the positional deviation directions of the element images 22 at the four corners. Then, the misregistration calculation unit 125 can calculate the misregistration amount of the entire film 20 so that the total sum of misregistration amounts of the element images 22 is minimized. Thereafter, the misregistration calculation unit 125 outputs the misregistration direction and misregistration amount of the entire film 20 to the misregistration adjustment unit 127.

[Operation of position adjustment device]
With reference to FIG. 7, the operation of the misalignment adjusting apparatus 100 of FIG. 3 will be described (see FIG. 3 as appropriate).
The misregistration adjustment apparatus 100 performs imaging by the imaging apparatus 110 and generates a captured image (imaging process: step S1).
The positional deviation adjusting device 100 determines whether or not the adjustment line pattern 50 is enlarged by the element lens 32 included in the captured image generated in step S1 by the enlargement determination unit 121 (determination step: step S2).

When the adjustment line pattern 50 is not enlarged (No in step S2), the positional deviation adjusting device 100 moves the imaging position to the imaging device stage 130 by the imaging position control means 123 (imaging position control step: step). S3), the process returns to the imaging step S1.
That is, the positional deviation adjusting apparatus 100 repeats steps S1 to S3 until it is determined in step S2 that the adjustment line pattern 50 is enlarged (Yes in step S2).

The misalignment adjusting apparatus 100 calculates the misalignment direction and misalignment amount between the film 20 and the lens array 30 by the misalignment calculating means 125 (position shift calculating step: step S4).
The misalignment adjusting apparatus 100 causes the misalignment adjusting unit 127 to move the film 20 to the film stage 140 based on the misalignment direction and the misalignment amount calculated in step S4 (adjustment step: step S5).

In the description of the operation of the misalignment adjusting apparatus 100, a general manufacturing process of the IP stereoscopic display panel 1 that is not directly related to the present invention is omitted.
For example, after the acrylic plate 10 is bonded to the film 20, the positions of the film 20 and the lens array 30 may be adjusted. Further, after adjusting the positions of the film 20 and the lens array 30, the acrylic plate 10 may be bonded to the film 20.

  Further, when adjusting the positions of the film 20 and the lens array 30, it is preferable not to apply the adhesive 40 between the film 20 and the lens array 30. Specifically, the positional deviation calculation device 120 fixes the film 20 at a position separated from the lens array 30 by a distance in air calculated from the refractive index of the adhesive 40, Adjust the position. After the misalignment adjustment, the misalignment calculating device 120 stores the bonding position between the film 20 and the lens array 30 (bonding position storing step). And after apply | coating the adhesive agent 40 to the film 20 or the lens array 30, the position shift calculation apparatus 120 bonds the film 20 and the lens array 30 in the memorize | stored bonding position (bonding process).

[Action / Effect]
The positional deviation adjusting device 100 according to the first embodiment of the present invention clearly shows whether or not the adjustment line pattern 50 is enlarged in the captured image. For this reason, the misalignment adjusting apparatus 100 can improve the determination accuracy of the enlargement determining unit 121 and can calculate an accurate misalignment direction and misalignment amount, compared to the case where the adjustment pattern is detected as it is as in the prior art. . As a result, the positional deviation adjusting device 100 can accurately adjust the positions of the film 20 and the lens array 30 even when the film 20 expands and contracts. Therefore, the image quality of the IP stereoscopic display panel 1 manufactured by the misalignment adjusting apparatus 100 is improved.

(Modification 1)
With reference to FIG. 8, a different point from the first embodiment will be described in Modification 1 of the present invention (see FIG. 3 as appropriate).
In the first embodiment, the imaging positions of the imaging device 110 are initially set for all the element lenses 32 that expand the adjustment line pattern 50 (for example, ten element lenses 32).
In the first modification, the element lens 32 that expands the intersection of the two adjustment line patterns 50 (for example, the two element lenses 32), the point at which the imaging position of the imaging device 110 is initially set is the same as in the first embodiment. Different.

As shown in FIG. 8, the intersections of the two adjustment line patterns 50 are P6 and P7. This imaging position is located on an axis passing through the intersection point P6 and the principal point of the element lens 32 corresponding to the element image 22 on which the intersection point P6 is printed.
Note that the imaging position is also initially set for the intersection point P7 located on the diagonal line of the intersection point P6 as in the intersection point P6.

  Here, it is assumed that there is no expansion / contraction of the film 20 and no positional deviation between the film 20 and the lens array 30. When viewed from this imaging position (position corresponding to the intersection P6 or P7 in FIG. 8), the two adjustment line patterns 50 are horizontal and vertical, respectively. Therefore, at this imaging position, the adjustment line pattern 50 is enlarged not only at the upper right element lens 32 but also at the four element lenses 32 through which the two adjustment line patterns 50 pass.

  Then, the imaging device 110 captures an image at an angle of view that can accommodate a total of five element lenses 32 through which the two adjustment line patterns 50 pass. Accordingly, the enlargement determination unit 121 determines whether or not the adjustment line pattern 50 is enlarged for the five element lenses 32 that enlarge the two adjustment line patterns 50 that pass through the intersection P6. Can be judged. As a result, the misalignment adjusting apparatus 100 can reduce the number of times of imaging of the imaging apparatus 110.

(Modification 2)
With reference to FIG. 9 and FIG. 10, a different point from the first embodiment will be described in the second modification of the present invention (refer to FIG. 3 as appropriate).

  The second modification is different from the first embodiment in that the imaging position of the imaging device 110 is initially set to an arbitrary point in the three-dimensional space. For example, as shown in FIG. 9, the imaging position is initially set on a perpendicular line from the center P8 of the film 20.

  As described above, the imaging position, the principal point of the element lens 32, and the adjustment line pattern 50 need to be positioned on a straight line. Therefore, the adjustment line pattern 50 needs to be printed shifted in advance from the center of the element image 22 without being printed at the center of the element image 22 as in the first embodiment.

  As shown in FIG. 10, the shift amount e of the adjustment line pattern 50 can be calculated using the similarity between the triangles P1, P3, P9 and the triangles P1, P10, P5. The triangles P1, P3, and P9 are right-angled triangles having the principal point P1 of the element lens 32 as a vertex and line segments P3 and P9 representing the shift amount e of the adjustment line pattern 50 as bases. The triangles P1, P10, and P5 are right-angled triangles having the principal point P1 of the element lens 32 as a vertex and line segments P10 and P5 representing the movement amount l of the imaging device 110 as bases.

Here, the focal length f and the distance z are known. Therefore, the shift amount e of the adjustment line pattern 50 can be calculated from the distance l using the following equation (2).
z: f = l: e (2)

In FIG. 10, the imaging device 110 located on the axis line between the center of the element image 22 and the principal point P <b> 1 of the element lens 32 is illustrated by a dotted line. That is, the dotted line imaging device 110 represents the imaging device 110 at the imaging position initially set in the first embodiment.
Further, the position of the shifted adjustment line pattern 50 is P9, and the imaging position of the dotted imaging device 110 is P10.
The distance l represents the distance between the imaging positions P10 and P5.

According to the second modification, the misalignment adjusting apparatus 100 can further reduce the number of times of imaging of the imaging apparatus 110. Furthermore, the positional deviation adjusting device 100 can calculate the positional deviation direction and the positional deviation amount between the film 20 and the lens array 30 only by slightly moving the imaging position regardless of whether the film 20 is expanded or contracted.
In the first and second modifications, the processing of the misregistration calculation device 120 is the same as that in the first embodiment, and thus further description thereof is omitted.

(Second Embodiment)
[Configuration of IP stereoscopic video display panel]
With reference to FIGS. 11 and 12, the configuration of the IP stereoscopic video display panel 1B according to the second embodiment of the present invention will be described while referring to differences from the first embodiment.

  In the first embodiment, since the adjustment line pattern 50 has a line width of one pixel (FIG. 2), when the film 20 is displaced by one pixel or more with respect to the lens array 30, the adjustment line pattern 50 is imaged. In addition, it is necessary to move the imaging device 110.

  The present embodiment is different from the first embodiment in that the adjustment line pattern 52 has a line width of at least two pixels and has different gradation values in the line width direction (FIG. 11). Therefore, the positional deviation adjusting device 100B can calculate the positional deviation amount from the gradation value if the positional deviation amount is within the line width of the adjustment line pattern 52 in the film 20B and the lens array 30. As shown in FIG. 12, the IP stereoscopic video display panel 1 </ b> B includes an acrylic plate 10, a film (printing member) 20 </ b> B, and a lens array 30.

As shown in FIG. 11A, the film 20B is printed such that two adjustment line patterns 52 pass through the center of the element image 22 on the outer edge side in the vertical direction and the horizontal direction, respectively. For example, as shown in FIG. 11B, the adjustment line pattern 52 is a straight line having a width of 5 pixels, and has five gradation values from the upper side to the lower side. That is, the adjustment line pattern 52 has a different gradation value for each pixel in the line width direction.
In other respects, the IP stereoscopic image display panel 1B is the same as that of the first embodiment, and thus further description thereof is omitted.

[Configuration of misalignment adjusting device]
The configuration of the misregistration adjustment apparatus 100B according to the second embodiment of the present invention will be described while referring to differences from the first embodiment.
The misregistration adjustment device 100B includes an imaging device 110, a misregistration calculation device 120B, an imaging device stage 130, and a film stage 140.
The positional deviation calculation device 120B includes an enlargement determination unit (determination unit) 121B, an imaging position control unit 123, a positional deviation calculation unit 125B, and a positional deviation adjustment unit 127.

The enlargement determination unit 121B determines whether or not the adjustment line pattern 52 is enlarged by the element lens 32 included in the captured image from the imaging device 110. For example, the enlargement determination unit 121B detects the element lens 32 from the captured image. The enlargement determination unit 121B determines which of the gradation values included in the adjustment line pattern 52 the detected gradation value of the element lens 32 matches. In this way, the enlargement determination unit 121B can determine whether or not the adjustment line pattern 52 is enlarged.
Other points and the enlargement determination unit 121B are the same as those in the first embodiment, and thus further description thereof is omitted.

When the positional deviation calculation command is input from the enlargement determination unit 121B, the positional deviation calculation unit 125B calculates the positional deviation direction by comparing the gradation values of the adjustment line pattern 52 enlarged by the element lens 32. It is. Further, the positional deviation calculation means 125B calculates the positional deviation amount so that the variance of the gradation values of the adjustment line pattern 32 enlarged by the element lens 32 is minimized.
Other points and the positional deviation calculation means 125B are the same as those in the first embodiment, and thus further description is omitted.

<Adjustment of misalignment>
With reference to FIGS. 13 and 14, the adjustment of the misalignment by the misalignment adjusting device 100B will be specifically described (see FIGS. 11 and 12 as appropriate).
In FIG. 13, to simplify the description, it is assumed that the adjustment line pattern 52 has a width of three pixels and has three gradation values in the line width direction.
Further, in FIG. 14, the lens array 30 is illustrated by broken lines in order to make the drawing easy to see.

  Consider a case in which there is no positional deviation between the film 20B and the lens array 30 as shown in FIG. In this case, the imaging position of the imaging device 110, the principal point P1 of the element lens 32, and the pixels having intermediate gradation values in the adjustment line pattern 52 are aligned on a straight line. Therefore, the element lens 32 enlarges the pixel having the intermediate gradation value in the adjustment line pattern 52.

Consider a case where the film 20B and the lens array 30 are displaced by one pixel as shown in FIG. In this case, the element lens 32 enlarges the pixel having the minimum gradation value in the adjustment line pattern 52.
As shown in FIG. 13C, consider a case where the film 20B and the lens array 30 are displaced by one pixel on the opposite side of FIG. 13B. In this case, the element lens 32 enlarges the pixel having the maximum gradation value in the adjustment line pattern 52.

  As described above, in the element lens 32, when the positional deviation between the film 20B and the lens array 30 is within the line width of the adjustment line pattern 52, the image of the gradation value corresponding to the positional deviation amount is enlarged. Therefore, the enlargement determination unit 121B can determine whether or not the adjustment line pattern 52 is enlarged based on the gradation value of the adjustment line pattern 52 enlarged by the element lens 32.

  When the positional deviation between the film 20 </ b> B and the lens array 30 exceeds the line width of the adjustment line pattern 52, the adjustment line pattern 52 is not enlarged on the element lens 32. In this case, the positional deviation adjustment device 100B repeats the processes of the imaging device 110, the enlargement determination unit 121B, and the imaging position control unit 123 until the adjustment line pattern 52 is enlarged on the element lens 32.

  Consider the case where the film 20B and the lens array 30 are displaced in the rotational direction as shown in FIG. In this case, in each element lens 32, the gradation value of the adjustment line pattern 52 to be enlarged is different.

  For example, it is assumed that an average value of gradation values is 100, a gradation value of a certain element lens 32 is less than 100, and a gradation value of an adjacent element lens 32 exceeds 100. In this case, since the adjacent element lenses 32 are displaced in different directions, it can be said that the entire film 20 is displaced in the rotational direction. Therefore, the positional deviation calculation means 125B can calculate the positional deviation direction by comparing the gradation values of the adjustment line pattern 52 enlarged by the adjacent element lens 32.

  Further, the misregistration calculation means 125B calculates the average and variance of the gradation values of the adjustment line pattern 52 in order to minimize the misregistration amount. Then, the misregistration calculation unit 125B obtains a misregistration amount that minimizes the calculated variance value.

  The positional deviation adjusting means 127 minimizes the positional deviation between the film 20B and the lens array 30 as shown in FIG. 14B by moving the film 20B in the calculated positional deviation direction and amount. Can do.

[Action / Effect]
The positional deviation adjusting device 100B according to the second embodiment of the present invention can accurately adjust the positions of the film 20B and the lens array 30 for the same reason as in the first embodiment. Therefore, the image quality of the IP stereoscopic display panel 1B manufactured by the misalignment adjusting apparatus 100B is improved.
Furthermore, since the misalignment adjusting device 100B can further reduce the number of times of imaging of the imaging device 110, the position of the film 20B and the lens array 30 can be quickly adjusted. Thereby, the position shift adjustment device 100B can reduce the cost of the IP stereoscopic display panel 1B.

(Third embodiment)
[Configuration of misalignment adjusting device]
With reference to FIG. 15 and FIG. 16, the difference of the configuration of the misregistration adjustment apparatus 100 </ b> C according to the third embodiment of the present invention from the first embodiment will be described.

  In the first embodiment, since the adjustment line pattern 50 is printed on the film 20, the element image 32 that enlarges the adjustment line pattern 50 cannot display the IP stereoscopic video. Therefore, the third embodiment is different from the first embodiment in that the adjustment line pattern 50 is projected onto the film 20C.

As shown in FIG. 15, the IP stereoscopic image display panel 1 </ b> C includes an acrylic plate 10, a film (printing member) 20 </ b> C, and a lens array 30 </ b> C.
As shown in FIG. 16, the film 20 </ b> C and the lens array 30 </ b> C are printed with adjustment print patterns 54 </ b> A and 54 </ b> B similar to those in FIG. 25 in order to calculate the expansion / contraction amount of the film 20 </ b> C.
Specifically, on the film 20 </ b> C, a cross-shaped adjustment print pattern 54 </ b> A is printed in an area other than the element image 22. In the lens array 30C, the adjustment print pattern 54B made of four quadrangles is printed in a region other than the element lens 32 (for example, four corners of the lens surface).
In other respects, the IP stereoscopic video display panel 1C is the same as that of the first embodiment, and thus further description thereof is omitted.

  As illustrated in FIG. 15, the misregistration adjustment device 100 </ b> C includes an imaging device 110, a misregistration calculation device 120, an imaging device stage 130, a film stage 140, an imaging device (second imaging unit) 210, and expansion / contraction. A quantity calculation device 220, a projection device (projection means) 230, and a half mirror 240 are provided.

  The imaging device 210 images the film 20C on which the adjustment print pattern 54A is printed and the lens array 30C on which the adjustment print pattern 54B is printed. The imaging device 210 captures the IP stereoscopic video display panel 1C from the film 20C side, thereby generating a captured image (second captured image). Then, the imaging device 210 outputs the generated captured image to the expansion / contraction amount calculation device 220.

The expansion / contraction amount calculation device 220 calculates the expansion / contraction amount of the film 20 </ b> C using the captured image input from the imaging device 210. Then, the expansion / contraction amount calculation device 220 generates an adjustment line pattern 50 projected by the projection display device 230 based on the calculated expansion / contraction amount, and outputs the adjustment line pattern 50 to the projection device 230.
Details of the expansion / contraction amount calculation device 220 will be described later.

The projection device 230 projects the adjustment line pattern 50 input from the expansion / contraction amount calculation device 220 onto the film 20 </ b> C via the half mirror 240. For example, the projector 230 can be a general projector.
That is, the adjustment print patterns 54A and 54B originally printed and the adjustment line pattern 50 projected from the projection device 230 are reflected on the film 20C.

Here, it is preferable that the imaging device 210 and the projection device 230 perform calibration for distortion correction in advance so that the image is not distorted. For example, this calibration method is described in Reference Document 1 below.
Reference 1: “A flexible new technique for camera calibration”, http://opencv.jp/sample/camera_calibration.html, IEEE Transactions on Pattern Analysis and Machine Intelligence, 22 (11), 1330-1334, 2000.

  The half mirror 240 is an optical element that transmits light from the film 20 </ b> C and enters the imaging device 210. Moreover, the half mirror 240 reflects the light from the projection device 230 toward the film 20C.

[Configuration of stretching amount calculation device]
The expansion / contraction amount calculation device 220 includes an adjustment print pattern detection unit (detection unit) 221, an expansion / contraction amount calculation unit 223, and an adjustment line pattern deformation unit (deformation unit) 225.

  The adjustment print pattern detection unit 221 detects the adjustment print patterns 54A and 54B from the captured image input from the imaging device 210. For example, the adjustment print pattern detection unit 221 performs pattern matching on the captured image and detects the adjustment print patterns 54A and 54B. Then, the adjustment print pattern detection unit 221 outputs the detected adjustment print patterns 54A and 54B to the expansion / contraction amount calculation unit 223.

  The expansion / contraction amount calculation unit 223 calculates the expansion / contraction amount of the film 20C based on the positions of the adjustment print patterns 54A and 54B input from the adjustment print pattern detection unit 221. Then, the expansion / contraction amount calculation unit 223 outputs the calculated expansion / contraction amount of the film 20 </ b> C to the adjustment line pattern deformation unit 225.

  Specifically, the expansion / contraction amount calculation means 223 calculates the expansion / contraction amount of the entire film 20C from the positional relationship between the adjustment print patterns 54A and 54B at the four corners. For example, the upper side of the film 20C is contracted more greatly as the interval between the two adjustment print patterns 54A located on the upper side becomes shorter than the interval between the upper adjustment print patterns 54B. Further, the lower side of the film 20C is greatly extended as the interval between the two adjustment print patterns 54A located on the lower side becomes longer than the interval between the lower adjustment print patterns 54B. In this case, the expansion / contraction amount calculation means 223 deforms the entire film 20C into a trapezoid by an expansion / contraction amount corresponding to the interval between the upper adjustment print patterns 54A and the interval between the lower adjustment print patterns 54A. And calculate.

  The adjustment line pattern deforming unit 225 is preset with an adjustment line pattern 50 projected onto the non-expandable film 20C, and this adjustment line is changed according to the expansion / contraction amount of the film 20C input from the expansion / contraction amount calculation unit 223. The pattern 50 is deformed. Then, the adjustment line pattern deformation unit 225 outputs the deformed adjustment line pattern 50 to the projection device 230.

  For example, consider the case where the film 20C is deformed into a trapezoid. In this case, the adjustment line pattern deforming unit 225 shortens the upper adjustment line pattern 50 and lengthens the lower adjustment line pattern 50 out of the two adjustment line patterns 50 in the horizontal direction. The adjustment line pattern deforming means 225 widens the interval between the two adjustment line patterns 50 in the vertical direction from the upper side to the lower side. That is, the two adjustment line patterns 50 in the vertical direction are opened in a square shape.

[Action / Effect]
Since the misalignment adjusting device 100C according to the third embodiment of the present invention deforms the adjustment line pattern 50 in accordance with the expansion and contraction of the film 20C, the positions of the film 20C and the lens array 30C are determined as in the first embodiment. It can be adjusted with high accuracy. Therefore, the image quality of the IP stereoscopic display panel 1C manufactured by the misalignment adjusting apparatus 100C is improved.

  Furthermore, if the positional deviation adjusting device 100C ends the projection of the adjustment line pattern 50 after adjusting the positions of the film 20C and the lens array 30C, the adjustment line pattern 50 does not remain on the film 20C. As described above, the IP stereoscopic display panel 1C manufactured by the misregistration adjusting device 100C can easily view the IP stereoscopic image because the IP stereoscopic image is not obstructed by the adjustment line pattern 50.

The misalignment adjusting apparatus 100C projects the adjustment line pattern 50, but may project the adjustment line pattern 52 of FIG. In this case, the misalignment adjusting apparatus 100C may include the misalignment calculating apparatus 120B in FIG. 12 instead of the misalignment calculating apparatus 120 in FIG.
In FIG. 15, the positional deviation calculation device 120 and the expansion / contraction amount calculation device 220 are illustrated as separate hardware, but may be integrated.

(Fourth embodiment)
[Configuration of misalignment adjusting device]
With reference to FIG. 17, the difference from the third embodiment will be described regarding the configuration of the misalignment adjusting apparatus 100 </ b> D according to the fourth embodiment of the present invention (see FIG. 15 as appropriate).
The misalignment adjusting apparatus 100D is different from the third embodiment in that it acquires not only the adjustment print patterns 54A and 54B but also the element image 22 printed on the film 20C.

  In the third embodiment, the element image 22 onto which the adjustment line pattern 50 is projected is displayed in black when there is no image information for displaying the IP stereoscopic video. In this case, depending on the light transmittance of the film 20C, it may be difficult for the adjustment line pattern 50 to pass through the film 20C, and the detection rate of the adjustment line pattern 50 may decrease.

  Therefore, the misregistration adjustment apparatus 100D selects and selects the element image 22 that easily transmits light among the element images 22 printed on the film 20C using the image information of the element image 22 printed on the film 20C. The adjustment line pattern 50 is projected onto the element image 22 thus obtained.

[Configuration of stretching amount calculation device]
The expansion / contraction amount calculation device 220D includes an adjustment print pattern detection unit 221, an expansion / contraction amount calculation unit 223, an adjustment line pattern deformation unit (deformation unit) 225D, a luminance value calculation unit 227, and an element image selection unit (selection unit). ) 229.

  The luminance value calculation unit 227 detects all the element images 22 from the captured image input from the imaging device 210 and calculates the luminance value of the detected element image 22. For example, the luminance value calculating unit 227 calculates the luminance value of the element image 22 by averaging or summing the luminance values of all the pixels included in the detected element image 22. Then, the luminance value calculating unit 227 outputs the calculated luminance value of the element image 22 to the element image selecting unit 229.

The element image selection unit 229 determines whether or not the luminance value of the element image 22 input from the luminance value calculation unit 227 is equal to or higher than a preset threshold value, and selects the element image 22 having a luminance value equal to or higher than the threshold value. Is. Then, the element image selecting unit 229 outputs selection information representing the selected element image 22 to the adjustment line pattern deforming unit 225D.
This selection information is information indicating the position of the selected element image 22 among the element images 22 of the film 20C, for example.

The adjustment line pattern deforming unit 225D deforms the adjustment line pattern 50 to be superimposed on the element image 22 indicated by the selection information input from the element image selecting unit 229.
That is, the adjustment line pattern deforming unit 225D deforms the adjustment line pattern 50 so that the adjustment line pattern 50 is displayed on the element image 22 selected by the element image selecting unit 229.
The other points, adjustment line pattern deformation means 225D, are the same as those in the third embodiment, and thus further description thereof is omitted.

[Action / Effect]
The misalignment adjusting apparatus 100D according to the fourth embodiment of the present invention reduces the situation where the adjustment line pattern 50 does not pass through the film 20C, and thus can improve the detection rate of the adjustment line pattern 50. Thereby, the position shift adjustment device 100D can adjust the positions of the film 20C and the lens array 30C with higher accuracy than in the third embodiment. Therefore, the image quality of the IP stereoscopic display panel 1C manufactured by the misalignment adjusting device 100D is improved.

(Modification 3)
With reference to FIG. 18, a different point from the fourth embodiment will be described in the third modification of the present invention (see FIG. 17 as appropriate).
Modification 3 is different from the fourth embodiment in that an arbitrary IP stereoscopic video having depth information is used as the adjustment stereoscopic pattern 60 instead of the adjustment line pattern 50.

As illustrated in FIG. 18, the positional deviation adjustment device 100 </ b> D projects a stereoscopic pattern image 62 that can display the adjustment stereoscopic pattern 60 by the projection device 230. Then, in the positional deviation adjusting device 100D, the three-dimensional pattern image 62 is displayed as the adjusting three-dimensional pattern 60 by the lens array 30.
Note that the three-dimensional pattern image 62 is preferably information that can form an adjustment three-dimensional pattern 60 that is significantly different from the IP three-dimensional image, in order to prevent erroneous detection by the misregistration calculation device 120D.

  Here, in order to adjust the position, depth information and shape information of the adjustment solid pattern 60 are required. Therefore, in the expansion / contraction amount calculation device 220D, depth information and shape information of the adjustment solid pattern 60 are set. Then, the expansion / contraction amount calculation device 220D outputs the depth information and the shape information of the adjustment solid pattern 60 to the misalignment calculation device 120D (illustrated by a broken line in FIG. 17). In this case, the positional deviation calculation device 120D detects the adjustment three-dimensional pattern 60 using the depth information and the shape information of the adjustment three-dimensional pattern 60. Further, the imaging apparatus 110 focuses on the adjustment three-dimensional pattern 60 using the depth information acquired from the positional deviation calculation apparatus 120D.

(Fifth embodiment)
[Configuration of IP stereoscopic video display panel]
With reference to FIGS. 19 and 20, the configuration of an IP stereoscopic video display panel 1 </ b> E according to the fifth embodiment of the present invention will be described while referring to differences from the first embodiment.
The fifth embodiment is different from the first embodiment in that the adjustment rectangular patterns 70A and 70B are used instead of the adjustment line pattern 50.

As shown in FIG. 19, the IP stereoscopic video display panel 1E includes an acrylic plate 10, a film 20E, and a lens array 30E.
As shown in FIG. 20A, an adjustment rectangular pattern 70A surrounding the element image 22 is printed on the film 20E. In FIG. 20, the film 20 </ b> E is illustrated with a broken line in order to make the drawing easy to see.
On the lens array 30E, an adjustment rectangular pattern 70B surrounding the element lens 32 is printed.
Other points, the film 20E and the lens array 30E are the same as those in the first embodiment.

<Details of rectangular pattern for adjustment>
Hereinafter, details of the adjustment rectangular patterns 70A and 70B will be described.
The adjustment rectangular pattern 70 </ b> A has a frame line surrounding all the element images 22. The adjustment rectangular pattern 70A has a plurality of line segments orthogonal to the frame line. For example, the adjustment pattern 70A has six line segments per side. In the adjustment rectangular pattern 70A, this line segment becomes a detection reference.

  When the film 20E is not stretched, the adjustment rectangular patterns 70A and 70B have the same shape and the same size. The adjustment rectangular patterns 70A and 70B are preferably printed in different colors in order to improve the detection rate. For example, the adjustment rectangular pattern 70A is printed in red on the film 20E. The adjustment rectangular pattern 70B may be printed in blue on the lens array 30E.

[Configuration of misalignment adjusting device]
A configuration of a misregistration adjustment apparatus 100E according to the fifth embodiment of the present invention will be described.
As shown in FIG. 19, the misregistration adjustment apparatus 100E includes an imaging device (imaging means) 110E, a misregistration calculation device 120E, and a film stage (moving means) 140.

  The imaging device 110E generates a captured image by imaging the film 20E and the lens array 30E. In this imaging device 110E, the imaging position does not move and is always constant. In addition, the imaging device 110E outputs the generated captured image to the positional deviation calculation device 120E.

[Configuration of misalignment calculation device]
As shown in FIG. 19, the positional deviation calculation device 120E includes a pattern detection unit (detection unit) 122, a positional deviation calculation unit 125E, and a positional deviation adjustment unit (adjustment unit) 127E.

  The pattern detecting unit 122 detects the adjustment rectangular pattern 70A printed on the film 20E and the adjustment rectangular pattern 70A printed on the lens array 30E from the captured image input from the imaging device 110E. For example, the pattern detection unit 122 performs color region detection processing or straight line detection processing on the captured image to detect the adjustment rectangular patterns 70A and 70B. Then, the pattern detection unit 122 outputs the detected adjustment rectangular patterns 70A and 70B to the positional deviation calculation unit 125E.

  The misregistration calculation unit 125E calculates the misregistration amounts of the adjustment rectangular patterns 70A and 70B input from the pattern detection unit 122. For example, the positional deviation calculation means 125E calculates the distance of the detection reference corresponding to the adjustment rectangular patterns 70A and 70B as the positional deviation amount for each detection reference. Then, the positional deviation calculation unit 125E outputs the calculated positional deviation amount to the positional deviation adjustment unit 127E.

  The misalignment adjusting unit 127E moves the film 20E to the film stage 140 to a position where the misalignment amount input from the misalignment calculating unit 125E is minimized. The misalignment adjusting means 127E generates a drive signal corresponding to the misalignment amount and outputs it to the film stage 140.

<Adjustment of misalignment>
With reference to FIG. 20 and FIG. 21, the adjustment of the misalignment by the misalignment adjusting device 100E will be specifically described (see FIG. 19 as appropriate).
In FIGS. 20 and 21, the film 20 </ b> E is indicated by a broken line for easy viewing of the drawings.

First, as shown in FIG. 20B, the case where the film 20E does not expand and contract and is displaced in the rotation direction is considered.
In this case, the misregistration calculation unit 125E calculates the misregistration amount for each detection reference included in the horizontal line pattern and the vertical line pattern. The horizontal line pattern is a horizontal line portion positioned vertically in the adjustment rectangular patterns 70A and 70B. The vertical line pattern is a vertical line portion located on the left and right in the adjustment rectangular patterns 70A and 70B.

  Then, the misalignment adjusting unit 127E performs alignment so that each of the misalignment amounts in the vertical direction and the horizontal direction is minimized. In this case, the misalignment adjusting means 127E moves the film 20E to a position where the adjustment patterns 70A and 70B completely coincide as shown in FIG.

  Next, as shown in FIG. 21A, the case where the film 20E is stretched and there is no positional deviation in the rotation direction is considered. In this case, the positional deviation adjusting means 127E adjusts the position so that the positional deviation amounts of the adjustment patterns 70A and 70B are minimized as shown in FIG.

[Operation of position adjustment device]
With reference to FIG. 22, the operation of the misalignment adjusting apparatus 100E of FIG. 19 will be described (see FIG. 19 as appropriate).
The positional deviation adjusting device 100E performs imaging by the imaging device 110E and generates a captured image (imaging process: step S10).

  In the positional deviation adjusting device 100E, the pattern detection unit 122 detects the adjustment rectangular pattern 70A printed on the film 20E and the adjustment rectangular pattern 70A printed on the lens array 30E from the captured image generated in step S10. (Detection step: Step S11).

The positional deviation adjusting device 100E calculates the positional deviation amounts of the adjustment rectangular patterns 70A and 70B detected in step S11 by the positional deviation calculating means 125E (position deviation calculating step: step S12).
The positional deviation adjusting device 100E causes the positional deviation adjusting means 127E to move the film 20E to the film stage 140 based on the positional deviation amount calculated in step S12 (adjustment step: step S13).

[Action / Effect]
The misregistration adjustment apparatus 100E according to the fifth embodiment of the present invention is provided with many detection references on the four sides of the adjustment rectangular patterns 70A and 70B. Thereby, the positional deviation adjusting device 100E can improve the detection accuracy of the adjustment rectangular patterns 70A and 70B, and can adjust the positions of the film 20E and the lens array 30E with high accuracy. Therefore, the image quality of the IP stereoscopic display panel 1E manufactured by the misalignment adjusting apparatus 100E is improved.

(Sixth embodiment)
[Configuration of IP stereoscopic video display panel]
With reference to FIG. 23, the configuration of the IP stereoscopic video display panel 1F according to the sixth embodiment of the present invention will be described while referring to differences from the first embodiment.
As shown in FIG. 23, the IP stereoscopic image display panel 1F is different from the first embodiment in that a light transmission limiting film (light transmission limiting member) 80 is provided on the convex surface side of the lens array 30.

  The light transmission limiting film 80 is a film that allows only light from a certain angle to pass through. The angle at which the light transmission limiting film 80 transmits light is the same as or smaller than the light emission angle of the lens array 30. In the present embodiment, the light emission angle of the lens array 30 is equal to the range in which the IP stereoscopic image can be observed, and this range is set as the viewing zone.

  The light transmission limiting film 80 can be fixed to the lens array 30 by an arbitrary method. For example, the light transmission limiting film 80 can be bonded to the lens array 30 using a light transmission type adhesive.

  When the light transmission limiting film 80 is not provided, the IP image of the side lobe is observed within the range beyond the exit angle of the lens array 30. On the other hand, when the light transmission limiting film 80 is provided, only the color of the surface of the light transmission limiting film 80 is observed in the range beyond the emission angle of the lens array 30, so that the IP image of the side lobe cannot be observed.

  Here, a two-dimensional image may be printed on the surface of the light transmission limiting film 80. Then, a two-dimensional image printed on the light transmission limiting film 80 is observed in a range exceeding the exit angle of the lens array 30. Further, both the two-dimensional image and the IP stereoscopic video can be observed within the range of the exit angle of the lens array 30.

[Action / Effect]
Since the IP stereoscopic video display panel 1F according to the sixth embodiment of the present invention does not display the IP stereoscopic video from the side lobe, the image quality can be improved.

The light transmission limiting film 80 may be disposed not on the convex surface side of the lens array 30 but on the back surface side (the acrylic plate 10 side) of the film 20.
Further, after the light transmission limiting film 80 is bonded to the lens array 30, the positional deviation between the film 20 and the lens array 30 may be adjusted. Further, after adjusting the positional deviation between the film 20 and the lens array 30, the light transmission limiting film 80 may be bonded to the lens array 30.
Needless to say, the IP stereoscopic image display panel 1F can also be applied to the second to fifth embodiments.

(Other variations)
As mentioned above, although each embodiment of this invention was explained in full detail, this invention is not limited to each above-mentioned embodiment, The design change etc. of the range which does not deviate from the summary of this invention are also included.
In each of the above-described embodiments, the film and the lens array are bonded together using an adhesive, but the present invention is not limited to this.

  In each of the above-described embodiments, the film has been described as the printing member. However, the printing member may be anything as long as it can print the element image regardless of light transmission. For example, examples of the printing member include members that transmit light, such as paper, glass, and acrylic. The printing member may be a member that does not transmit light, such as metal. However, when the printing member is a member that does not transmit light at all, it cannot be applied to the third and fourth embodiments.

  In each of the embodiments described above, the second moving unit has been described as moving the film, but the present invention is not limited to this. For example, the second moving means may move the lens array instead of the film. In this case, it is necessary to move the first imaging means in conjunction with the lens array.

1,1B, 1C, 1E, 1F IP stereoscopic image display panel (stereoscopic image display device)
10 Acrylic plates 20, 20B, 20C, 20E Film (printing member)
22 Element image 30, 30C, 30E Lens array 32 Element lens 40 Adhesives 50, 52, 54A, 54B Adjustment line patterns 70A, 70B Adjustment rectangular pattern 80 Light transmission limiting film (light transmission limiting member)
100, 100B, 100C, 100D, 100E Misalignment adjusting device 110, 110E Imaging device (first imaging means, imaging means)
120, 120B, 120D, 120E Misalignment calculating device 121, 121B Enlargement determination means (determination means)
122 Pattern detection means (detection means)
123 Image pickup position control means 125, 125B, 125E Position deviation calculation means 127, 127E Position deviation adjustment means (adjustment means)
130 Stage for imaging apparatus (first moving means)
140 Film stage (second moving means, moving means)
210 Imaging device (second imaging means)
220, 220D Expansion / contraction amount calculation device 221 Print pattern detection means for adjustment (detection means)
223 Expansion / contraction amount calculation means 225, 225D Adjustment line pattern deformation means (deformation means)
227 Luminance value calculation means 229 Element image selection means (selection means)
230 Projection device (projection means)
240 half mirror

Claims (10)

A method for manufacturing a stereoscopic image display apparatus, comprising: a printing member on which an element image is printed; and a lens array in which element lenses are two-dimensionally arranged.
An imaging process for generating a captured image by imaging the printing member and the lens array in which an adjustment line pattern is superimposed on a plurality of the element images from a predetermined imaging position;
A determination step of determining whether or not the adjustment line pattern is enlarged by the element lens included in the captured image;
When the adjustment line pattern is not enlarged, the imaging position control step of moving the imaging position and re-executing the processing of the imaging step and the determination step;
When the adjustment line pattern is enlarged, a displacement calculation step of calculating a displacement direction and a displacement amount between the printing member and the lens array;
An adjustment step of moving either the printing member or the lens array based on the displacement direction and displacement amount calculated in the displacement calculation step;
Are sequentially executed. A method of manufacturing a stereoscopic video display device. A positional deviation adjusting device for a stereoscopic image display device, comprising: a printing member on which an element image is printed; and a lens array in which element lenses are two-dimensionally arranged.
A first imaging unit that generates a first captured image by capturing an image of the printing member and the lens array in which an adjustment line pattern is superimposed on a plurality of element images from a predetermined imaging position;
First moving means for moving the imaging position of the first imaging means;
Determination means for determining whether or not the adjustment line pattern is enlarged by the element lens included in the first captured image;
An imaging position control unit that moves the imaging position to the first moving unit and causes the first imaging unit and the determination unit to re-execute processing when the adjustment line pattern is not enlarged;
When the adjustment line pattern is enlarged, a positional deviation calculating means for calculating a positional deviation direction and a positional deviation amount between the printing member and the lens array;
Second moving means for moving either the printing member or the lens array;
Adjusting means for causing the second moving means to move either the printing member or the lens array based on the positional deviation direction and the positional deviation amount calculated by the positional deviation calculating means;
A position deviation adjusting device comprising: The first imaging means captures the first captured image including the adjustment line pattern having a width of one pixel,
The misregistration calculating means calculates the misregistration direction corresponding to the movement direction of the first imaging means when the adjustment line pattern is enlarged, and from the movement amount of the first imaging means according to the similarity relationship. The positional deviation adjustment device according to claim 2, wherein the positional deviation amount is calculated. The first imaging unit generates the first captured image including the adjustment line pattern having a line width of two pixels or more and having a gradation value different in a line width direction;
When the adjustment line pattern is enlarged, the positional deviation calculation means calculates the positional deviation direction by comparing the gradation values of the adjustment line pattern, and the gradation value of the adjustment line pattern The positional deviation adjustment device according to claim 2, wherein the positional deviation amount is calculated so that the variance of the deviation is minimized. By imaging the printing member on which the adjustment print pattern is printed in a region other than the element image and the lens array on which the adjustment print pattern is printed in a region other than the element lens, a second captured image is obtained. Second imaging means to generate,
Detecting means for detecting a print pattern for adjustment between the print member and the lens array from the second captured image;
Expansion / contraction amount calculating means for calculating the expansion / contraction amount of the printing member based on the position of the print pattern for adjustment between the printing member and the lens array detected by the detection means;
Deformation means for presetting an adjustment line pattern projected on the printing member without expansion and contraction, and deforming the preset adjustment line pattern according to the expansion and contraction amount;
Projection means for projecting the adjustment line pattern deformed by the deformation means onto the printing member;
The positional deviation adjusting device according to any one of claims 2 to 4, further comprising: A luminance value calculating means for detecting the element image from the second captured image and calculating a luminance value of the detected element image;
A selection unit that determines whether or not the luminance value calculated by the luminance value calculation unit is equal to or greater than a preset threshold value, and that selects an element image having the luminance value equal to or greater than the threshold value;
6. The positional deviation adjusting device according to claim 5, wherein the deforming unit deforms the adjustment line pattern to be superimposed on the element image selected by the selecting unit. A method for manufacturing a stereoscopic image display apparatus, comprising: a printing member on which an element image is printed; and a lens array in which element lenses are two-dimensionally arranged.
An imaged image is generated by imaging the printing member on which the adjustment rectangular pattern surrounding all the element images is printed and the lens array on which the adjustment rectangular pattern surrounding all the element lenses is printed. Imaging process;
From the captured image, a detection step of detecting an adjustment rectangular pattern printed on the printing member and the lens array;
A displacement calculation step of calculating a displacement amount of an adjustment rectangular pattern between the printing member and the lens array detected in the detection step;
An adjustment step of moving either the printing member or the lens array to a position where the amount of displacement calculated in the displacement calculation step is minimized;
Are sequentially executed. A method of manufacturing a stereoscopic video display device. A positional deviation adjusting device for a stereoscopic image display device, comprising: a printing member on which an element image is printed; and a lens array in which element lenses are two-dimensionally arranged.
An imaged image is generated by imaging the printing member on which the adjustment rectangular pattern surrounding all the element images is printed and the lens array on which the adjustment rectangular pattern surrounding all the element lenses is printed. Imaging means;
Moving means for moving either the printing member or the lens array;
Detecting means for detecting an adjustment rectangular pattern printed on the printing member and the lens array from the captured image;
A displacement calculating means for calculating a displacement amount of an adjustment rectangular pattern between the printing member and the lens array detected by the detecting means;
Adjusting means for causing the moving means to move either the printing member or the lens array to a position where the positional deviation amount calculated by the positional deviation calculating means is minimized;
A position deviation adjusting device comprising: A stereoscopic image display device comprising a printing member on which an element image is printed, and a lens array in which element lenses are two-dimensionally arranged,
A light transmission limiting member that is disposed on the exit surface side of the lens array and transmits light within a predetermined angle range;
A stereoscopic video display device comprising:   The stereoscopic image display apparatus according to claim 9, wherein the printing member is printed with an adjustment line pattern that overlaps a plurality of the element images or an adjustment rectangular pattern that surrounds all the element images.