JP2009223193A - Manufacturing apparatus of three-dimensional image display device, manufacturing method of three-dimensional image display device, and lens board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing apparatus of a three-dimensional image display device which can prevent the degradation of display quality of a three-dimensional image. <P>SOLUTION: The manufacturing apparatus of the three-dimensional image display device includes: imaging parts 15A and 15B which obtain a first image including a first mark and the end part of a lenticular lens 4a and a second image including a second mark and the end part of the lenticular lens 4a; a means which obtains the first brightness change position of a cylindrical lens closest to the first mark, from the first image, to obtain a first deviation amount in a width direction between the first brightness change position and the first mark, the second brightness change position of a cylindrical lens which is on a straight line passing through the first brightness change position and closest to the second mark, from the second image, to obtain a second deviation amount in a width direction between the second brightness change position and the second mark, and the relative position between the lenticular lens 4a and a display panel 2, on the basis of the first deviation amount, the second deviation amount, the first mark and the second mark; and a moving mechanism 14 which relatively moves the display panel 2 and a lens board 4, on the basis of the relative position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a three-dimensional image display device manufacturing apparatus, a three-dimensional image display device manufacturing method, and a lens plate.

  As a display panel of a three-dimensional image display device, a liquid crystal display panel (LCD) that controls the intensity of light using the orientation of liquid crystal, a plasma display panel (PDP) that emits a phosphor by ultraviolet rays of plasma discharge, Flat panel display such as a field emission display panel (FED) that emits a phosphor by an electron beam of a field emission type electron-emitting device and an electron emission display panel that emits a phosphor by an electron beam of a surface conduction electron-emitting device A device is used.

  As a three-dimensional image display method, there are various methods such as a multi-view method and an integral imaging method. As a three-dimensional image display device that displays a three-dimensional image using such a method, a three-dimensional image display device including a lenticular lens has been developed. When this lenticular lens is used, a three-dimensional image can be viewed without using glasses for visually recognizing a three-dimensional image.

Normally, when a lenticular lens is provided on a display panel, a lens plate having the lenticular lens is bonded to the display panel with an adhesive applied in a rectangular frame shape on the display panel. The alignment at this time is performed based on the alignment marks of the display panel and the lens plate. These alignment marks are usually formed by machining the display panel and the lens plate, respectively. A technique for providing a lenticular lens on a liquid crystal display panel has been proposed for the purpose of improving light utilization efficiency (see, for example, Patent Document 1).
Japanese Patent No. 3708112

  However, in the case of using an alignment mark by machining, the position accuracy of the alignment mark is lowered due to the influence of the machining accuracy when machining the alignment mark on the display panel or the lens plate. Therefore, it is difficult to keep the relative position of the lenticular lens and the display panel in the planar direction within an allowable range (for example, within a range of target value ± several μm). If the relative position is outside the allowable range, the viewing zone center is shifted and affects the viewing zone, so that the display quality of the three-dimensional image is degraded.

  The present invention has been made in view of the above, and an object of the present invention is to provide a three-dimensional image display device manufacturing apparatus, a three-dimensional image display device manufacturing method, and a lens capable of preventing deterioration in display quality of a three-dimensional image. Is to provide a board.

  A first feature according to the embodiment of the present invention is that a display panel having a first position detection mark and a second position detection mark so as to sandwich the display area between peripheral areas of the display area, and a plurality of cylindrical A lens plate having a lenticular lens continuously arranged in a width direction orthogonal to the ridge line direction of the cylindrical lens, and a straight line passing through the ridge line direction of the cylindrical lens, the first position detection mark, and the second position detection mark. In the manufacturing apparatus of the three-dimensional image display device, the first image including the first position detection mark and the end of the lenticular lens is obtained by imaging the display panel through the lens plate. An imaging unit that acquires a second image including the second position detection mark and the end of the lenticular lens, and a lenticular lens from the acquired first image. The first luminance change position of the cylindrical lens closest to the first position detection mark is obtained from the obtained luminance distribution, and the obtained first luminance change position and first position detection are obtained. Means for obtaining a first deviation amount in the width direction with respect to the mark for use, and obtaining a luminance distribution in the width direction of the lenticular lens from the obtained second image, and on the straight line passing through the first luminance change position from the obtained luminance distribution. Thus, the second luminance change position of the cylindrical lens closest to the second position detection mark is obtained, and the second shift amount in the width direction between the obtained second luminance change position and the second position detection mark is obtained. Means for obtaining a relative position between the lenticular lens and the display panel based on the obtained first deviation amount and second deviation amount, and a straight line passing through the first position detection mark and the second position detection mark. And asked By relatively moving the display panel and the lens plate on the basis of the relative position is to include a moving mechanism for aligning the display panel and the lenticular lens.

  A second feature according to the embodiment of the present invention is that a display panel having a first position detection mark and a second position detection mark so that the display area is sandwiched between peripheral areas of the display area, and a plurality of cylindrical A lens plate having a lenticular lens continuously arranged in a width direction orthogonal to the ridge line direction of the cylindrical lens, and a straight line passing through the ridge line direction of the cylindrical lens, the first position detection mark, and the second position detection mark. In the method for manufacturing a three-dimensional image display device, the first image including the first position detection mark and the end of the lenticular lens is obtained by imaging the display panel through a lens plate. A second image including the second position detection mark and the end of the lenticular lens, and a lenticular lens from the acquired first image. The first luminance change position of the cylindrical lens closest to the first position detection mark is obtained from the obtained luminance distribution, and the obtained first luminance change position and first position detection are obtained. A step of obtaining a first deviation amount in the width direction from the mark, a luminance distribution in the width direction of the lenticular lens from the acquired second image, and a straight line passing through the first luminance change position from the obtained luminance distribution. Obtaining a second luminance change position of the cylindrical lens closest to the second position detection mark and obtaining a second shift amount in the width direction between the obtained second luminance change position and the second position detection mark. Determining a relative position between the lenticular lens and the display panel based on the obtained first deviation amount and second deviation amount and straight lines passing through the first position detection mark and the second position detection mark; Sought phase By relatively moving the display panel and the lens plate on the basis of the position is that a step for aligning the display panel and the lenticular lens.

  A third feature of the embodiment of the present invention is that, in a lens plate having a lenticular lens in which a plurality of cylindrical lenses are continuously arranged in a width direction orthogonal to the ridge line direction, any one of the plurality of cylindrical lenses is provided. It has a pair of plane portions formed by positioning both end portions in the ridge line direction of the lens on the inner side compared with both end portions in the ridge line direction of other cylindrical lenses.

  A fourth feature according to the embodiment of the present invention is that, in a lens plate having a lenticular lens in which a plurality of cylindrical lenses are continuously arranged in a width direction orthogonal to the ridge line direction, two adjacent cylindrical lenses among the plurality of cylindrical lenses are provided. It is formed by separating the lenses from each other, and includes a flat portion provided outside the display area where the image display light is incident on the lens plate.

  According to the present invention, it is possible to prevent deterioration in display quality.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.

(3D image display device)
As shown in FIG. 1, a three-dimensional image display device (hereinafter referred to as a display device) 1 according to an embodiment of the present invention includes a display panel 2 that displays an image, and a frame-shaped adhesive member on the display panel 2. 3 and a lens plate 4 having a lenticular lens 4a on the display panel 2 side.

  The display panel 2 includes a first substrate 2a serving as a back substrate such as an array substrate, and a second substrate 2b serving as a front substrate. In the surface of the display panel 2, a plurality of pixels are arranged in a predetermined pattern, for example, in a matrix (lattice). For example, a liquid crystal display panel is used as the display panel 2. A liquid crystal layer (not shown) is provided between the first substrate 2a and the second substrate 2b, and two polarizing plates 2c and 2d are provided on the outer surface of the display panel 2. The polarizing plates 2c and 2d are disposed on the display panel 2 so as to face each other.

  The first substrate 2a is, for example, a rectangular glass substrate. On the inner surface of the first substrate 2a (the surface facing the second substrate 2b: the upper surface in FIG. 1), there are a plurality of pixel electrodes and electrical wiring (none of which is shown) for supplying potential to them. Is provided. Each pixel electrode is provided in a dot shape (dot shape) for each pixel, and electric wiring is provided in a matrix shape (lattice shape). The second substrate 2b is, for example, a rectangular glass substrate. On the inner surface of the second substrate 2b (the surface facing the first substrate 2a: the lower surface in FIG. 1), a color filter F, a counter electrode (not shown) serving as a common electrode, and the like are provided. The color filter F includes a plurality of colored layers (red, green, and blue) provided in a dot shape or a stripe shape, and a light shielding layer such as a black matrix.

  The adhesive member 3 is a member for bonding the display panel 2 and the lens plate 4 together. The adhesive member 3 is formed between the display panel 2 and the lens plate 4 in a rectangular frame shape, for example. The adhesive member 3 functions as a side wall that joins the display panel 2 and the lens plate 4 to form the internal space N. The internal space N is a space formed by the display panel 2, the adhesive member 3, and the lens plate 4. As the adhesive member 3, for example, a photocurable resin or the like is used.

  The lens plate 4 is a lens member such as a lens substrate or a lens sheet having a lenticular lens 4a for generating a three-dimensional image. The lens plate 4 is a rectangular substrate, for example. In the lenticular lens 4a, a cylindrical lens (cylindrical lens) 4a1 having a shape obtained by dividing a cylinder into two in the axial direction is adjacent to a direction (short direction) orthogonal to the axial direction (longitudinal direction, that is, the ridge line direction). It is formed by arranging. Here, the cylindrical lens 4a1 is a cylindrical lens having a curvature only in one direction, and has one bent surface. The lenticular lens 4 a is fixed to the inner surface of the lens plate 4 and provided as a part of the lens plate 4. In addition, the lenticular lens 4a and the lens plate 4 may be integrated after being formed separately, or may be integrally formed using the same material from the beginning.

  Such a display device 1 applies the voltage according to the image signal (image data) to the pixel electrodes corresponding to the respective pixels arranged in a matrix, thereby improving the optical characteristics of each pixel (liquid crystal layer). Change the image to be displayed. In particular, the display device 1 displays a plurality of parallax images (two-dimensional images) that slightly differ in appearance depending on the viewing angle using an integral imaging method, and forms a three-dimensional image. This three-dimensional image is a natural, easy-to-see image and less fatigued, and the range in which such a three-dimensional image can be viewed is continuous.

(Three-dimensional image display device manufacturing equipment)
Next, the manufacturing apparatus 11 for the display device 1 will be described.

  As shown in FIG. 2, the manufacturing apparatus 11 according to the embodiment of the present invention supports a lens plate 4 at a predetermined height so as to face the stage 12 on which the display panel 2 is placed. A support unit 13, a stage moving mechanism 14 for moving the stage 12 in the XYZθ direction, a plurality of imaging units 15A and 15B (see FIG. 3) that perform imaging operations, and the imaging units 15A and 15B in the Z-axis direction (see FIG. 2 is provided with an imaging movement mechanism 16 that moves in the vertical direction in FIG. 2, a display unit 17 that displays images captured by the imaging units 15A and 15B, and a control unit 18 that controls each unit. These parts are provided on the gantry 19.

  The stage 12 is a stage that supports the display panel 2 by its own weight or a holding mechanism (for example, suction adsorption or electrostatic adsorption). The display panel 2 is placed on the holding surface of the stage 12. A frame-shaped adhesive member 3 is applied to the bonding surface of the display panel 2 (see FIG. 3).

  The support unit 13 includes a holding frame 13a that detachably holds the lens plate 4 and a pair of support plates 13b and 13c that support the holding frame 13a with respect to the stage 12 at a predetermined height. The holding frame 13a holds the periphery of the lens plate 4 by a holding mechanism (for example, suction adsorption or electrostatic adsorption). The holding frame 13a is formed of a light-transmitting material such as a transparent material so as not to hinder imaging by the imaging units 15A and 15B. The pair of support plates 13 b and 13 c are installed at positions facing each other via the stage moving mechanism 14 and are fixed on the gantry 19. The holding frame 13a is rotatably provided at the upper end portion of the support plate 13c. The free end of the holding frame 13a holding the lens plate 4 comes into contact with the upper end of the support plate 13b, and the lens plate 4 faces the display panel 2 on the stage 12 and is positioned at a predetermined height. In this state, the free end of the holding frame 13a is fixed to the upper end portion of the support plate 13b by a fixing member such as a screw, and then the lens plate 4 and the display panel 2 are bonded together.

  The stage moving mechanism 14 is a moving mechanism that moves the stage 12 in the XYθZ direction (see FIG. 2). The stage moving mechanism 14 is provided on a gantry 19 and is electrically connected to the control unit 18. The θ direction is the rotational direction on the XY plane in FIG. Such a stage moving mechanism 14 moves the stage 12 in the XYθ direction to align the display panel 2 and the lens plate 4 (lenticular lens 4a), and further moves the stage 12 in the Z-axis direction for display. The panel 2 and the lens plate 4 are bonded together. That is, the stage moving mechanism 12 functions as a moving mechanism that performs a moving operation for moving the display panel 2 and the lens plate 4 relative to each other. As this moving operation, a moving operation for alignment for aligning the lenticular lens 4a of the lens plate 4 and the display panel 2, a moving operation for bonding for bonding the lens plate 4 and the display panel 2, and the like. There is.

  Each of the imaging units 15A and 15B performs an imaging operation on the display panel 2 via the lens plate 4 to acquire an image. These imaging units 15A and 15B are provided on the support column 15a so as to be movable in the Z-axis direction (vertical direction in FIG. 2) which is a contact / separation direction with respect to the stage 12, and are electrically connected to the control unit 18. Yes. The support column 15a is fixedly provided on the gantry 19. As each imaging part 15A, 15B, a CCD camera etc. are used, for example. These imaging units 15A and 15B capture an image by epi-illumination, for example. The imaging units 15A and 15B are brought into focus by the vertical movement of the imaging units 15A and 15B by the imaging movement mechanism 16, an autofocus function, and the like.

  Here, as shown in FIGS. 3 and 4, position detection marks M <b> 1 and M <b> 2 such as alignment marks are provided on the display panel 2 so that the display area is sandwiched between the peripheral areas of the display area. Here, the position detection mark M1 functions as a first position detection mark, and the position detection mark M2 functions as a second position detection mark. These position detection marks M1 and M2 are provided at the end of the display panel 2 so as to be positioned on the same straight line passing through the center of the long side, and are formed into a cross shape by machining. The imaging unit 15A performs an imaging operation of imaging an image (first image) including the position detection mark M1 and the end of the lenticular lens 4a. That is, the imaging region is set to a region R1 including the position detection mark M1 and the end of the lenticular lens 4a. Similarly, the imaging unit 15B also performs an imaging operation for capturing an image (second image) including the position detection mark M2 and the end of the lenticular lens 4a. That is, the imaging region is set to a region R2 including the position detection mark M2 and the end of the lenticular lens 4a.

  The imaging movement mechanism 16 is a movement mechanism that is provided on the column 15a on the gantry 19 and moves the imaging units 15A and 15B in the Z-axis direction. The imaging movement mechanism 16 is fixed to the support column 15 a and is electrically connected to the control unit 18. As the imaging movement mechanism 16, for example, a linear motor mechanism or a feed screw mechanism is used. Each of the imaging units 15A and 15B is provided in the imaging movement mechanism 16 via a support member such as an arm member.

  The display unit 17 displays images captured by the image capturing units 15A and 15B. The display unit 17 is provided on the gantry 19 and is electrically connected to the control unit 18. For example, a liquid crystal display or a CRT (Cathode Ray Tube) display is used as the display unit 17.

  The control unit 18 includes a controller that centrally controls each unit, and a storage unit that stores various programs, various data, and the like (none of which are shown). The storage unit includes a RAM (Random Access Memory) that functions as a work area of the controller, a nonvolatile memory, and the like. The control unit 18 controls each unit based on various programs and various data stored in the storage unit. In particular, the control unit 18 executes a series of data processing for calculating or processing data, and a bonding process for bonding the display panel 2 and the lens plate 4. The pasting process includes an imaging process for performing imaging, a display process for displaying an image, a positioning process for performing positioning, and the like. The storage unit stores various parameters such as imaging conditions and detection conditions.

  Next, the manufacturing operation (manufacturing method) of the display device 1 performed by the manufacturing apparatus 11 will be described. In addition, the control part 18 of the manufacturing apparatus 11 performs a bonding process, and controls each part. At this time, the display panel 2 is placed on the stage moving mechanism 12, and the lens plate 4 is present at a predetermined position with respect to the display panel 2 on the stage moving mechanism 12 with the holding frame 13a closed (FIG. 2 and FIG. 3).

  As shown in FIG. 5, the control unit 18 is connected to the display panel 2 up to a position where an image (first image or second image) including the position detection marks M1 and M2 and the end of the lenticular lens 4a can be captured. The lens plate 4 is brought close to the lens plate (step S1). That is, the control unit 18 moves the display panel 2 to the predetermined position for imaging with respect to the lens plate 4 by the stage moving mechanism 14 with the holding frame 13a closed. Next, the control unit 18 performs imaging on the display panel 2 through the lens plate 4 (step S2). That is, the control unit 18 causes each of the imaging units 15A and 15B to perform an imaging operation in a state where the display panel 2 and the lens plate 4 are close to each other. Here, the imaging operation is an operation for imaging the display panel 2 on the stage 12 via the lens plate 4.

  As shown in FIGS. 2 and 3, the lens plate 4 is positioned between the display panel 2 on the stage 12 and the imaging units 15A and 15B and close to the display panel 2 when the holding frame 13a is closed. In this state, the imaging operations are performed by the imaging units 15A and 15B. At this time, the lenticular lens 4a of the lens plate 4 is located on the display panel 2 side. By the imaging operation of each of the imaging units 15A and 15B, an image G1 as shown in FIG. 6 and an image G2 as shown in FIG. 7 are obtained, and these images G1 and G2 are displayed side by side on the display unit 17. These images G1 and G2 are examples of images in a state where the relative positions of the display panel 2 and the lens plate 4 (lenticular lens 4a) in the plane direction are shifted.

  Next, the control unit 18 detects the trough b1 of the lenticular lens 4a from the captured images G1 and G2 (step S3). At this time, the position detection marks M1 and M2 are also detected from the images G1 and G2. Since the lenticular lens 4a is a lens in which the cylindrical lenses 4a1 are arranged in a direction orthogonal to the ridgeline direction, the lenticular lens 4a has a wavefront (see FIGS. 1 and 2) that sequentially repeats the valley portion b1 and the apex portion b2. . The image of the lenticular lens 4a including the valley portion b1 and the apex portion b2 is an image having a light and shade as shown in FIG. 8, and luminance is integrated from this image, and a luminance waveform (luminance distribution) as shown in FIG. 8 is obtained. A luminance peak is detected from this luminance waveform, and the position of each valley b1 and the position of each vertex b2 (luminance change position) are obtained.

  Thereafter, the control unit 18 obtains displacement amounts a1 and a2 in the X-axis direction between the two position detection marks M1 and M2 and the corresponding valley portions b1 respectively (step S4). At this time, a trough b1 having a small shift amount in the X-axis direction with respect to the two position detection marks M1 and M2 is used. As shown in FIG. 6, based on the captured image G1, a deviation amount a1 (first deviation amount a1) between the center line of the position detection mark M1 and the valley b1 in the X-axis direction is calculated. Similarly, as shown in FIG. 7, based on the captured image G2, a deviation amount a2 (second deviation amount a2) in the X-axis direction between the center line of the position detection mark M2 and the valley b1 is calculated. .

  In this way, the luminance distribution in the X-axis direction of the lenticular lens 4a is obtained from the image G1, and the position (first luminance) of the valley b1 of the cylindrical lens 4a1 closest to the position detection mark M1 from the luminance peak of the luminance distribution. Change position) and the amount of deviation a1 in the X-axis direction between the position of the valley b1 and the position detection mark M1 is obtained. Further, the luminance distribution in the X-axis direction of the lenticular lens 4a is obtained from the image G2, and the position of the valley b1 of the cylindrical lens 4a1 closest to the position detection mark M2 from the luminance peak of the luminance distribution (second luminance change position). And the amount of deviation a2 between the position of the valley b1 and the position detection mark M2 in the X-axis direction is obtained.

  In the present embodiment, the valley b1 is detected by the luminance peak and used for the calculation process. However, the present invention is not limited to this. For example, the vertex b2 is detected by the luminance peak and used for the calculation process. In addition, each valley b1 may be detected by the luminance peak, the center line of the adjacent valley b1 may be calculated and detected as the vertex b2, and used for the calculation process. Each vertex b2 may be detected by a luminance peak, the center line of the adjacent vertex b2 may be calculated and detected as a trough b1, and used for the calculation process. Here, the pitch of the valley part b1 (vertex part b2) is, for example, about 500 μm.

  Next, the control unit 18 obtains the first straight line L1 (see FIG. 9) from the deviation amounts a1 and a2 in the X axis directions (step S5), and the center c between the two position detection marks M1 and M2 (FIG. 9). (Refer to FIG. 9) (step S6). A second straight line L2 (see FIG. 9) passing through the two position detection marks M1 and M2 (each center) is determined (step S7). The center c between the first straight line L1 and the two position detection marks M1 and M2 and the second straight line L2, as shown in FIG. 9, are the coordinates and shift amounts of the two position detection marks M1 and M2, respectively. It is calculated from a1 and a2.

  Further, the control unit 18 calculates a separation distance d (see FIG. 9) between the first straight line L1 and the center c (step S8), and based on the first straight line L1 and the second straight line L2, the angle θ1 (see FIG. 9). ) Is calculated (step S9). The separation distance d is obtained by calculating the shortest distance between the center c and the first straight line L1, as shown in FIG. Further, as shown in FIG. 9, the angle θ1 is obtained by calculating the angle θ1 between the first straight line L1 and the second straight line L2. Thereby, the amount of deviation (separation distance d and angle θ1) in the X-axis direction and the θ direction, that is, the relative position in the planar direction between the display panel 2 and the lenticular lens 4a is obtained.

  Thereafter, the control unit 18 performs alignment based on the obtained separation distance d and the obtained angle θ1, and then performs bonding (step S10). In other words, the control unit 18 causes the stage moving mechanism 14 to perform a moving operation for alignment, and when the alignment is completed, causes the stage moving mechanism 14 to perform a moving operation for bonding. As a result, the display panel 2 on the stage 12 slides and moves by the separation distance d and rotates by the angle θ1, and the alignment of the lenticular lens 4a and the display panel 2 in the planar direction is completed. Thereafter, the display panel 2 on the stage 12 approaches the lens plate 4, the adhesive member 3 is crushed, the display panel 2 and the lenticular lens 4a come into contact, and the bonding of the display panel 2 and the lens plate 4 is completed. To do.

  Finally, the light for temporary curing is irradiated to the adhesive member 3, and the adhesive member 3 is temporarily cured. Thereafter, the display device 1 is transported from the stage 12 to a main curing device by a person such as an operator or a machine such as a robot, and the adhesive member 3 inside the main device is finally cured.

  In the manufacturing process based on such a bonding process, the position detection marks M1, M2 and the lenticular lens 4a are applied to the display panel 2 having the position detection marks M1, M2 via the lens plate 4 having the lenticular lens 4a. A step of capturing each of the images G1 and G2 including the image, and detecting the valley b1 of the lenticular lens 4a and the position detection marks M1 and M2 from the captured images G1 and G2, and detecting the detected valley b1 and each position. The respective shift amounts a1 and a2 are obtained from the detection marks M1 and M2, and the relative position in the plane direction between the display panel 2 and the lenticular lens 4a based on the obtained shift amounts a1 and a2 and the respective position detection marks M1 and M2. And aligning the display panel 2 and the lenticular lens 4a in the plane direction based on the obtained relative position. If you completion, and a step of performing bonding of the display panel 2 and the lens plate 4.

  Here, the display panel 2 and the lens plate 4 are pasted so that the deviation of the relative position between the display panel 2 and the lenticular lens 4a in the planar direction is within an allowable range (for example, within a range of a target value ± several μm). It is necessary to match. When the amount of deviation increases, the deviation of the relative position becomes out of the allowable range, the center of the viewing zone shifts and affects the viewing zone, and the display quality of the three-dimensional image is deteriorated. For example, the shift amount (shift amount) at the center of the viewing zone needs to be 10 mm or less.

  In the manufacturing process described above, images G1 and G2 including the position detection marks M1 and M2 provided on the display panel 2 and the ends of the lenticular lens 4a are taken. As a result, an image G1 as shown in FIG. 6 and an image G2 as shown in FIG. 7 are obtained as captured images. At this time, the position of the display panel 2 is specified by the position detection marks M1 and M2. The position of the lenticular lens 4a on the lens plate 4 is specified by the bright line (for example, the bright line of the valley b1) in the images G1 and G2. Based on these position detection marks M1 and M2 and the bright lines, the relative position in the plane direction between the display panel 2 and the lenticular lens 4a, that is, the amount of deviation in the X-axis direction and the θ direction is obtained.

  Therefore, the relative position in the planar direction between the display panel 2 and the lenticular lens 4a is obtained with higher accuracy than when alignment marks formed on the display panel 2 and the lens plate 4 by machining are used. The planes of the display panel 2 and the lenticular lens 4a so that the amount of deviation is eliminated based on the relative position with high accuracy, that is, the position detection marks M1, M2 and the valley b1 are positioned on the same straight line. Directional alignment is performed. Thereby, the relative position of the display panel 2 and the lenticular lens 4a in the planar direction is within the allowable range (for example, within the range of the target value ± several μm), and the shift of the viewing zone center is suppressed.

  As described above, according to the first embodiment of the present invention, the position detection mark is provided to the display panel 2 having the position detection marks M1 and M2 via the lens plate 4 having the lenticular lens 4a. Images G1 and G2 including the ends of M1 and M2 and the lenticular lens 4a are picked up, the valley b1 of the lenticular lens 4a and the position detection marks M1 and M2 are detected from the picked up images G1 and G2, and the detected valleys are detected. It is necessary to use an alignment mark formed on the lens plate 4 by normal machining by obtaining the relative position in the plane direction between the display panel 2 and the lenticular lens 4a based on the part b1 and the position detection marks M1 and M2. The relative position in the planar direction between the display panel 2 and the lenticular lens 4a is obtained with high accuracy, and based on the relative position Since the alignment between the display panel 2 and the lenticular lens 4a is performed, the relative position in the planar direction between the display panel 2 and the lenticular lens 4a can easily be within an allowable range (for example, within a range of target value ± several μm). It becomes possible. Thereby, since the shift | offset | difference of a visual field center is suppressed, the fall of the display quality of a three-dimensional image can be prevented.

  Further, the luminance distribution in the X-axis direction (width direction) of the lenticular lens 4a is obtained from the captured image G1, and the position (first) of the valley b1 of the cylindrical lens 4a1 closest to the position detection mark M1 from the luminance peak of the obtained luminance distribution. 1 brightness change position), a first shift amount a1 in the X-axis direction between the obtained position of the valley b1 and the position detection mark M1 is obtained, and further, the X-axis direction of the lenticular lens 4a is obtained from the captured image G2. The position of the valley b1 of the cylindrical lens 4a1 (second brightness change position) closest to the position detection mark M2 is obtained from the luminance peak of the obtained luminance distribution, and the position and position of the obtained valley b1 are obtained. A second shift amount a2 in the X-axis direction with respect to the detection mark M2 is obtained, and the display panel 2 and the lens are separated based on the obtained shift amounts a1 and a2 and the position detection marks M1 and M2. Since the relative position in the plane direction with respect to the cura lens 4a is obtained, it is possible to obtain information used for alignment by a simple calculation process, so that the load on the control unit 18 can be reduced and the processing time can be shortened. it can. In addition, the first straight line L1 is obtained based on the obtained deviation amounts a1 and a2, and the center c of the display panel 2 is obtained from the two position detection marks M1 and M2, and the two position detection marks M1 and M2 are obtained. The second straight line L2 that passes through is obtained, the distance d between the obtained first straight line L1 and the obtained center c is calculated, and the angle θ1 between the obtained first straight line L1 and the obtained second straight line L2 is calculated. Thus, information used for alignment can be obtained by a simpler calculation process.

  Note that a luminance waveform (luminance distribution) as shown in FIG. 10 may be obtained, and the luminance peak at the apex b2 may be distorted. This is because the luminance peak at the apex b2 is more likely to change according to the positional deviation than the luminance peak at the trough b1. Accordingly, in order to detect an accurate luminance peak, it is preferable to use the trough b1. By using this trough part b1, the relative position of the display panel 2 and the lenticular lens 4a in the planar direction can be obtained with higher accuracy than when the apex part b2 is used.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS.

  The second embodiment of the present invention is a modification of the first embodiment. Therefore, in particular, a different part from the first embodiment, that is, a modification of the lens plate 4 will be described. In the second embodiment, description of the same parts as those described in the first embodiment is omitted.

  As shown in FIGS. 11 and 12, the lens plate 4 according to the second embodiment of the present invention has a pair of flat portions 4b1 and 4b2 on a lenticular lens 4a. These flat portions 4b1 and 4b2 are formed by positioning both ends in the ridge line direction of one cylindrical lens 4a1 among the cylindrical lenses 4a1 in comparison with both ends in the ridge line direction of the other cylindrical lens 4a1. Yes. The flat portions 4b1 and 4b2 are provided at positions facing the position detection marks M1 and M2 on the display panel 2, respectively.

  When such a lens plate 4 is used, an image G3 as shown in FIG. 13 is obtained by the imaging operation of the imaging unit 15A. The image G3 is an image in which the position detection mark M1 and the lenticular lens 4a (the flat portion 4b1) overlap. As a result, the position detection mark M1 and the cylindrical lens 4a1 of the lenticular lens 4a are adjacent to each other in the direction perpendicular to the extending direction of the trough b1, and the position detecting mark M1 and the cylindrical lens 4a1 extend in the trough b1. Compared to the case where the distance is in the direction (see FIG. 6), the shift amount a1 between the position detection mark M1 and the valley b1 (or the apex b2) can be obtained with high accuracy. A similar image can be obtained by the imaging operation of the imaging unit 15B.

  Here, as shown in FIG. 14, the lenticular lens 4 a is formed from a light-transmitting plate material 52 using a mold 51, for example. The mold 51 is provided so as to be rotatable about a rotation shaft 53, and makes contact with a plate material 52 moving in one direction with a predetermined pressure to perform shape transfer. The mold 51 is formed with a concave portion 51a having a cylindrical bent surface for forming the cylindrical lens 4a1, a cylindrical lens 4a1 having a shorter length in the ridge line direction and a pair of flat portions 4b1, 4b2. The uneven part 51b for this is formed. In the concavo-convex portion 51b, both ends are convex portions having flat surfaces, and the center is a concave portion having a cylindrical bent surface.

  The plate material 52 moves in one direction while being pressed by the rotating mold 51. Thereby, the shape of the concave portion 51a of the mold 51 is transferred to the surface of the plate material 52, and the cylindrical lens 4a1 is sequentially formed. In addition, the shape (bent shape and flat shape) of the concavo-convex portion 51b is also transferred, and a cylindrical lens 4a1 and a pair of flat portions 4b1, 4b2 having a shorter length in the ridgeline direction than the others are formed. Thereafter, the plate material 52 after the mold shape transfer is cut to a predetermined length, and the lenticular lens 4a is completed (see FIGS. 11 and 12). The lenticular lens 4a is provided on a member such as a substrate or a sheet, and the lens plate 4 is manufactured.

  As described above, according to the second embodiment of the present invention, the same effect as in the first embodiment can be obtained. Further, of each cylindrical lens 4a1, a pair of plane portions 4b1, 4b2 formed by positioning both ends in the ridge line direction of one cylindrical lens 4a1 inward relative to both ends in the ridge line direction of the other cylindrical lens 4a1. Is used, the position detection marks M1 and M2 and the lenticular lens 4a (the flat portions 4b1 and 4b2 thereof) overlap, and the position detection marks M1 and M2 and the cylindrical lens 4a1 of the lenticular lens 4a are overlapped. The position detection mark M1 and the cylindrical lens 4a1 are adjacent to each other in the direction in which the valley b1 extends (see FIG. 6). It is possible to obtain the deviation amounts a1 and a2 between the detection marks M1 and M2 and the valley b1 with high accuracy. It made. Thereby, the precision of alignment with the display panel 2 and the lenticular lens 4a can be improved.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. 15 and 16.

  The third embodiment of the present invention is a modification of the first embodiment. Therefore, in particular, a different part from the first embodiment, that is, a modification of the lens plate 4 will be described. In the third embodiment, description of the same parts as those described in the first embodiment is omitted.

  As shown in FIG. 15, the lens plate 4 according to the third embodiment of the present invention has two flat portions 4c1 and 4c2 in which the lenticular lens 4a does not have a row of cylindrical lenses 4a1. These flat portions 4c1 and 4c2 are formed by separating two cylindrical lenses 4a1 adjacent to each other among the cylindrical lenses 4a1. The flat portions 4c1 and 4c2 are provided at positions facing the position detection marks M1 and M2 on the display panel 2, respectively, and in addition, a display on which light for image display on the lens plate 4 is incident. They are provided outside the region H1. Note that a total of four position detection marks M1 and M2 are provided on the display panel 2, and a total of four imaging units 15A and 15B are provided corresponding to the position detection marks M1 and M2.

  Here, the lenticular lens 4a is formed from a translucent plate material 52 using, for example, a mold 51 (see FIG. 14). The mold 51 has basically the same configuration as that of the second embodiment, but instead of the concavo-convex portions 51b, convex portions for forming the flat portions 4c1 and 4c2 that do not have the row of cylindrical lenses 4a1 are formed. ing. The pressing surface of the convex portion is a flat surface. A plurality of the convex portions are provided according to the pitch of the flat portions 4c1 and 4c2.

  The plate material 52 moves in one direction while being pressed by the rotating mold 51 as in the second embodiment. Thereby, the shape of the concave portion 51a of the mold 51 is transferred to the surface of the plate material 52, and the cylindrical lens 4a1 is sequentially formed. In addition, the shape of the convex portion (flat shape) is also transferred, and flat portions 4c1 and 4c2 that do not have one row of cylindrical lenses 4a1 are formed. Thereafter, the plate material 52 after the mold shape transfer is cut to a predetermined length, and the lenticular lens 4a is completed (see FIG. 15). The lenticular lens 4a is provided on a member such as a substrate or a sheet, and the lens plate 4 is manufactured.

  As shown in FIG. 16, in the image of the imaging region R1, the boundary between the flat portion 4c1 and the cylindrical lens 4a1 (one of both sides of the valley portion b1) is used for the shift amount calculation. Also in the image, the boundary used in the image of the imaging region R1 is used for the shift amount calculation. For example, in FIG. 16, the boundary located on the right side of the valley b1 is used. Accordingly, the shift amounts a1 and a2 from the boundary of the valley b1 in the same row are calculated from both images. By providing the flat surface portion 4c1 in this way, the valley b1 in the same row can be reliably detected and the same boundary can be used, so that it is possible to prevent using different valleys b1 that are not in the same row. It becomes possible. As a result, the shift amounts a1 and a2 between the position detection marks M1 and M2 and the valley b1 can be obtained with high accuracy, and as a result, the alignment accuracy between the display panel 2 and the lenticular lens 4a can be improved. it can.

  In the first and second embodiments described above, it is assumed that valleys b1 in the same column are used in two images used for displacement calculation, and the display panel 2 and the lens plate 4 are located at predetermined positions. In general, it is possible to use the valley b1 in the same row. However, for some reason, the relative position of the display panel 2 and the lens plate 4 may be largely rotated in the θ direction. Even when the relative position between the display panel 2 and the lens plate 4 is largely rotated in the θ direction and shifted, the lens plate 4 according to the third embodiment can be used to ensure the valley b1 in the same row. Can be used.

  As described above, according to the third embodiment of the present invention, the same effect as in the first embodiment can be obtained. Further, a lens plate 4 having flat portions 4c1 and 4c2 formed by separating two cylindrical lenses 4a1 adjacent to each other out of the respective cylindrical lenses 4a1 and provided outside the display region on which image display light is incident is provided. As in the second embodiment, the position detection marks M1 and M2 and the lenticular lens 4a (the flat portions 4c1 and 4c2) overlap with each other, and the position detection marks M1 and M2 and the lenticular lens 4a are used. Since the cylindrical lens 4a1 is adjacent to the direction perpendicular to the extending direction of the valley b1, the position detection mark M1 and the cylindrical lens 4a1 are separated from each other in the extending direction of the valley b1 (see FIG. 6), and it is possible to accurately obtain the deviation amounts a1 and a2 between the position detection marks M1 and M2 and the valley b1. It becomes ability. Thereby, the precision of alignment with the display panel 2 and the lenticular lens 4a can be improved. In addition, since it is possible to reliably detect the valley b1 in the same row, it is possible to prevent the use of different valleys b1 that are not in the same row, and the position detection marks M1, M2 and valley The deviation amounts a1 and a2 from the part b1 can be obtained with high accuracy. As a result, the alignment accuracy between the display panel 2 and the lenticular lens 4a can be improved.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the above-described embodiment, a liquid crystal display panel (LCD) is used as the display panel 2. However, the present invention is not limited to this, and a plasma display panel (PDP), a field emission display panel (FED), and an electron emission are not limited thereto. A display panel (SED) or the like may be used.

  In the above-described embodiment, the cross-shaped position detection marks M1 and M2 as shown in FIG. 4 are used. However, the present invention is not limited to this. For example, a square shape or a rhombus shape may be used. Is not limited. In addition, although the two position detection marks M1 and M2 are used, the number is not limited to this, and the number is not limited.

  Furthermore, in the above-described embodiment, the plurality of imaging units 15A and 15B are used. However, the present invention is not limited to this. For example, one imaging unit is provided so as to be capable of reciprocating in the Y-axis direction. However, the number is not limited.

  Finally, in the above-described embodiment, various numerical values are given, but these numerical values are merely examples and are not limited.

It is sectional drawing which shows schematic structure of the display apparatus which concerns on the 1st Embodiment of this invention. It is a schematic diagram which shows schematic structure of the manufacturing apparatus of the display apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing for demonstrating the alignment which the manufacturing apparatus shown in FIG. 2 performs. It is explanatory drawing for demonstrating the imaging which the manufacturing apparatus shown in FIG. 2 performs. It is a flowchart which shows the flow of the bonding process which the manufacturing apparatus shown in FIG. 2 performs. It is a top view which shows an example of the captured image by the 1st imaging part. It is a top view which shows an example of the captured image by the 2nd imaging part. It is explanatory drawing for demonstrating the detection of the trough part or vertex part of a lenticular lens. It is explanatory drawing for demonstrating calculation of a 1st straight line, a 2nd straight line, a separation distance, and an angle. It is explanatory drawing for demonstrating the detection of the trough part of a lenticular lens. It is explanatory drawing for demonstrating the imaging which the manufacturing apparatus of the display apparatus which concerns on the 2nd Embodiment of this invention performs. It is a perspective view which shows schematic structure of the modification of the lens plate which concerns on the 2nd Embodiment of this invention. It is a top view which shows an example of the captured image by the 1st imaging part. It is explanatory drawing for demonstrating the manufacturing method of the lens plate shown in FIG.11 and FIG.12. It is explanatory drawing for demonstrating the imaging which the manufacturing apparatus of the display apparatus which concerns on the 3rd Embodiment of this invention performs. It is explanatory drawing for demonstrating calculation of a 1st straight line, a 2nd straight line, a separation distance, and an angle.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Three-dimensional image display apparatus (display apparatus), 2 ... Display panel, 4 ... Lens plate, 4a ... Lenticular lens, 4a1 ... Cylindrical lens, 11 ... Manufacturing apparatus of 3D image display apparatus, 14 ... Moving mechanism (stage movement) Mechanism), 15A, 15B ... imaging unit, M1, M2 ... position detection mark, G1, G2 ... image, a1, a2 ... deviation amount, b1, b2 ... switching unit (valley part, vertex part), 4b1, 4b2, 4c1, 4c2 ... plane part

Claims (6)

A display panel having a first position detection mark and a second position detection mark so that the display area is sandwiched between peripheral areas of the display area, and a width direction in which a plurality of cylindrical lenses are orthogonal to a ridge line direction of the cylindrical lens A lens plate having a lenticular lens continuously arranged in parallel with the ridge line direction of the cylindrical lens and a straight line passing through the first position detection mark and the second position detection mark being bonded in parallel In an apparatus for manufacturing an image display device,
A first image including the first position detection mark and an end of the lenticular lens, the second position detection mark, and the lenticular are obtained by imaging the display panel through the lens plate. An imaging unit for acquiring a second image including an end of the lens;
A luminance distribution in the width direction of the lenticular lens is obtained from the obtained first image, and a first luminance change position of the cylindrical lens closest to the first position detection mark is obtained from the obtained luminance distribution, and obtained. Means for obtaining a first shift amount in the width direction between the first luminance change position and the first position detection mark;
A luminance distribution in the width direction of the lenticular lens is obtained from the acquired second image, and is determined on the straight line passing through the first luminance change position from the obtained luminance distribution and is the closest to the second position detection mark. Means for obtaining a second brightness change position of the cylindrical lens close to each other, and obtaining a second shift amount in the width direction between the obtained second brightness change position and the second position detection mark;
A relative position between the lenticular lens and the display panel based on the obtained first deviation amount and second deviation amount and a straight line passing through the first position detection mark and the second position detection mark. A means of seeking
A moving mechanism that moves the display panel and the lens plate relative to each other based on the obtained relative position to align the display panel and the lenticular lens;
An apparatus for manufacturing a three-dimensional image display device, comprising: The means for obtaining the first deviation amount obtains a valley of the lenticular lens as the first luminance change position,
2. The apparatus for manufacturing a three-dimensional image display device according to claim 1, wherein the means for obtaining the second shift amount obtains a valley of the lenticular lens as the second luminance change position. A display panel having a first position detection mark and a second position detection mark so that the display area is sandwiched between peripheral areas of the display area, and a width direction in which a plurality of cylindrical lenses are orthogonal to a ridge line direction of the cylindrical lens A lens plate having a lenticular lens continuously arranged in parallel with the ridge line direction of the cylindrical lens and a straight line passing through the first position detection mark and the second position detection mark being bonded in parallel In the manufacturing method of the image display device,
A first image including the first position detection mark and an end of the lenticular lens, the second position detection mark, and the lenticular are obtained by imaging the display panel through the lens plate. Obtaining a second image including an end of the lens;
A luminance distribution in the width direction of the lenticular lens is obtained from the obtained first image, and a first luminance change position of the cylindrical lens closest to the first position detection mark is obtained from the obtained luminance distribution, and obtained. Obtaining a first shift amount in the width direction between the first luminance change position and the first position detection mark;
A luminance distribution in the width direction of the lenticular lens is obtained from the acquired second image, and is determined on the straight line passing through the first luminance change position from the obtained luminance distribution and is the closest to the second position detection mark. Obtaining a second luminance change position of the cylindrical lens that is close, and obtaining a second shift amount in the width direction between the obtained second luminance change position and the second position detection mark;
A relative position between the lenticular lens and the display panel based on the obtained first deviation amount and second deviation amount and a straight line passing through the first position detection mark and the second position detection mark. The process of seeking
Relative movement of the display panel and the lens plate based on the obtained relative position, and aligning the display panel and the lenticular lens;
A method for manufacturing a three-dimensional image display device. In the step of obtaining the first deviation amount, the valley portion of the lenticular lens is obtained as the first luminance change position,
4. The method of manufacturing a three-dimensional image display device according to claim 3, wherein, in the step of obtaining the second shift amount, a valley portion of the lenticular lens is obtained as the second luminance change position. In a lens plate having a lenticular lens in which a plurality of cylindrical lenses are continuously arranged in the width direction orthogonal to the ridge line direction,
A pair of plane portions formed by positioning both end portions in the ridge line direction of one of the plurality of cylindrical lenses inward relative to both end portions in the ridge line direction of the other cylindrical lenses are provided. A lens plate characterized by that. In a lens plate having a lenticular lens in which a plurality of cylindrical lenses are continuously arranged in the width direction orthogonal to the ridge line direction,
The two cylindrical lenses adjacent to each other among the plurality of cylindrical lenses are formed so as to be separated from each other, and have a plane portion provided outside the display area on which the image display light is incident on the lens plate. Lens plate to do.