JP2015152897A - Method for manufacturing optical display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical display device that bonds an optical member to a liquid crystal panel with high position accuracy to enable high-quality image display.SOLUTION: A method for manufacturing an optical display device that bonds an optical member 1 including a phase difference layer formed by belt-like extension of a plurality of first areas and a plurality of second areas in a plan view to a liquid crystal panel having a plurality of pixel columns includes: a determination step of determining a central line C3 of a width direction of the first area centrally positioned in a direction in which the phase difference layer crosses a display area of the liquid crystal panel in a planarly overlapping portion, in at least one end portion and a central portion in an extending direction of the phase difference layer; and a bonding step of bonding the optical member 1 to the liquid crystal panel, on the basis of a relative position between the central line C3 in the central portion and the pixel column centered in a crossing direction of the liquid crystal panel and centrally positioned.

Description

  The present invention relates to a method for manufacturing an optical display device.

  In recent years, passive 3D (3 Dimension) liquid crystal display devices called FPR (Film Patterned Retarder) have been developed.

  In this type of 3D liquid crystal display device (display device), for example, a polarizer layer is disposed on the display surface side of the liquid crystal panel, and a patterned retardation layer is disposed further on the viewing side. A polarizing film is disposed on the backlight side of the liquid crystal panel.

  The polarizer layer is a layer having an optical function of absorbing the polarization component of the vibration plane parallel to the absorption axis of the polarizer layer and transmitting the polarization component of the vibration plane orthogonal to the incident light. The transmitted light immediately after passing through the polarizer layer is linearly polarized light.

  The patterned retardation layer is usually formed on a base film. The patterned retardation layer includes a first region and a second region. The first region and the second region are each formed in a band shape, and are alternately arranged corresponding to the pixel arrangement of the liquid crystal panel formed in a matrix.

  FIG. 12 is a plan view for explaining alignment between the liquid crystal panel P and the patterned retardation layer 3 in the 3D liquid crystal display device.

  As shown in the figure, in the liquid crystal panel P, red pixels R, green pixels G, and blue pixels B are periodically arranged along the long side (left and right direction of the liquid crystal panel P). A large number of pixels R, G, B of each color are arranged in the left-right direction to form a pixel column L, and a large number of pixel columns L are arranged over the display area of the liquid crystal panel P.

  On the other hand, the patterned retardation layer 3 has a plurality of first regions 3R and a plurality of second regions 3L extending along the long sides of the patterned retardation layer 3. A large number of first regions 3R and second regions 3L are arranged in the vertical direction corresponding to each pixel column L of the liquid crystal panel P. For example, the first region 3R is arranged on the viewing side of the pixel column L that displays the right-eye image, and the second region 3L is arranged on the viewing side of the pixel column L that displays the left-eye image. The first region 3R and the second region 3L have different phase difference directions, and the right-eye image and the left-eye image are displayed on the viewer side in different polarization states (for example, patents). Reference 1).

  The patterned retardation layer 3 is bonded to the liquid crystal panel P so that the boundary line K between the first region 3R and the second region 3L is located between the pixel columns L, and the liquid crystal panel P is used. An FPR 3D liquid crystal display device is configured.

  The user views the display image through so-called polarized glasses equipped with optical elements having different optical characteristics between the right-eye lens and the left-eye lens. Each image for the left eye is selectively visually recognized. Accordingly, the user can recognize a stereoscopic image obtained by fusing the images of both eyes.

JP 2012-212033 A

  In manufacturing the 3D liquid crystal display device of the FPR method as described above, the first region of the patterned retardation layer and the pixel column of the liquid crystal panel or the second region and the pixel column are accurately associated with each other. An optical member including a phase difference layer and a polarizer layer is bonded to a liquid crystal panel. At this time, if both the first region and the second region of the patterned retardation layer overlap with one pixel column, the right-eye image that should be recognized only by the right eye is also the left eye. There is a risk of so-called crosstalk that is recognized, which may degrade the image quality of the stereoscopic display image.

  However, the relative position and orientation after bonding of the optical member and the liquid crystal panel are shifted due to manufacturing errors of the optical member, deformation of the optical member, and low optical detection accuracy for positioning during bonding. There is a fear.

  The present invention has been made in view of such circumstances, and provides an optical display device manufacturing method capable of bonding an optical member and a liquid crystal panel with high positional accuracy to display a high-quality image. With the goal.

  In order to solve the above problems, according to one embodiment of the present invention, a plurality of first regions that change incident linearly polarized light into a first polarization state and a plurality of second regions that change into a second polarization state are provided. A plurality of the first regions and a plurality of the second regions are bonded to an optical display component having a plurality of pixel rows, the optical member having a retardation layer formed in a band shape in plan view In the method of manufacturing an optical display device, the retardation layer is alternately arranged in a direction in which the first region and the second region intersect the extending direction of the first region and the second region. And at the center of the crossing direction in a portion where the retardation layer and the display area of the optical display component overlap in a planar manner at at least one end portion and the central portion in the extending direction of the retardation layer. The center in the width direction of the first region located The optical member based on a relative position of the center line in the central portion and a pixel row located in the central portion in the intersecting direction of the optical display component; The manufacturing method of the optical display device which has the bonding process of bonding the said optical display component is provided.

  In one mode of the present invention, in the pasting process, based on the central line in at least one end of the extension direction, and the central line in the central part, the optical member and the optical It is good also as a manufacturing method which controls and controls the relative azimuth | direction in the bonding surface with a display component.

  In one aspect of the present invention, in the pasting step, based on the relative position of the center line in the central portion and the pixel column located in the central portion in the center of the intersecting direction, It is good also as a manufacturing method which controls the relative position of the said width direction of the said optical member and the said optical display component.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the optical display device which can bond an optical member and a liquid crystal panel with high position accuracy, and can display a high quality image can be provided.

It is a top view which shows schematic structure of a display apparatus. It is sectional drawing which shows schematic structure of a display apparatus. It is a schematic diagram of a patterned retardation layer. It is explanatory drawing of the manufacturing method of the optical display device of this embodiment. It is explanatory drawing of the manufacturing method of the optical display device of this embodiment. It is explanatory drawing of the manufacturing method of the optical display device of this embodiment. It is explanatory drawing of the manufacturing method of the optical display device of this embodiment. It is explanatory drawing of the manufacturing method of the optical display device of this embodiment. It is explanatory drawing of the manufacturing method of the optical display device of this embodiment. It is explanatory drawing of the manufacturing method of the optical display device of this embodiment. It is explanatory drawing of the manufacturing method of the optical display device of this embodiment. It is a top view for demonstrating position alignment with the liquid crystal panel and patterned retardation layer in a 3D liquid crystal display device.

  Hereinafter, the manufacturing method of the optical display device according to the present embodiment will be described with reference to the drawings. In all the drawings below, the dimensions and ratios of the constituent elements are appropriately changed in order to make the drawings easy to see.

<Optical display device>
1-3 is explanatory drawing which shows the display apparatus (optical display device) 100 manufactured with the manufacturing method of the optical display device of this embodiment.

  FIG. 1 is a plan view showing a schematic configuration of the display device 100. FIG. 2 is a cross-sectional view of the display device 100 taken along line II-II in FIG. The display device 100 of this embodiment is an FPR 3D liquid crystal display device. As shown in the figure, the display device 100 includes a liquid crystal panel (optical display component) P, a polarizing film F11, and an optical member 1.

  As shown in FIGS. 1 and 2, the liquid crystal panel P includes a first substrate P1 having a rectangular shape in a plan view, and a relatively small rectangular shape arranged to face the first substrate P1. And a liquid crystal layer P3 sealed between the first substrate P1 and the second substrate P2. The liquid crystal panel P has a rectangular shape that conforms to the outer shape of the first substrate P1 in a plan view, and a region that fits inside the outer periphery of the liquid crystal layer P3 in a plan view is a display region P4.

  Alignment marks Am for positioning are provided at the four corners of the liquid crystal panel P in plan view. Although the figure shows that the alignment marks Am are provided at all four corners, for example, a total of three alignment marks may be provided at three of the four corners, and a total of two alignments may be provided at diagonal positions of the four corners. A mark may be provided.

  A polarizing film F11 is bonded to the backlight side of the liquid crystal panel P. The polarizing film F11 is bonded to the liquid crystal panel P through the adhesive layer. The polarizing film F11 has an optical function of absorbing the polarization component of the vibration plane parallel to the absorption axis and transmitting the polarization component of the vibration plane orthogonal to the incident light. The transmitted light immediately after passing through the polarizing film F11 is linearly polarized light.

  On the other hand, the optical member 1 is bonded to the display surface side of the liquid crystal panel P. The optical member 1 has a polarizer layer 2 and a patterned retardation layer (retardation layer) 3, and is bonded to the liquid crystal panel P so that the polarizer layer 2 side faces the liquid crystal panel P.

  The polarizer layer 2 has an optical function of absorbing the polarization component of the vibration plane parallel to the absorption axis and transmitting the polarization component of the vibration plane orthogonal to the incident light. The transmitted light immediately after passing through the polarizer layer 2 is linearly polarized light.

  FIG. 3 is a schematic diagram of the patterned retardation layer 3 included in the optical member 1. The patterned retardation layer 3 has a plurality of first regions 3R and a plurality of second regions 3L. The patterned retardation layer 3 is a member having a rectangular shape in plan view.

  The first region 3R changes the linearly polarized light emitted through the polarizer layer 2 to, for example, right-handed circularly polarized light (first polarization state). The second region 3L changes the linearly polarized light emitted through the polarizer layer 2 to, for example, left-handed circularly polarized light (second polarization state).

  The first region 3R and the second region 3L are formed to extend in the longitudinal direction of the patterned retardation layer 3, and alternately in a direction crossing the extending direction of the first region 3R and the second region 3L. Has been placed. The widths of the first region 3R and the second region 3L are set according to the size of the pixels of the liquid crystal panel P to be bonded. For example, it is about 400 μm to 500 μm.

  In the following description, the extending directions of the first region 3R and the second region 3L in the patterned retardation layer 3 are defined as the “longitudinal direction” of the patterned retardation layer 3, the first region 3R, and the second region 3L. The arrangement direction may be referred to as the “width direction” of the patterned retardation layer 3. The “longitudinal direction” corresponds to the “extending direction” in the present invention, and the “width direction” corresponds to the “crossing direction” in the present invention.

  In the display device 100, the patterned retardation layer 3 has a “surplus region” that protrudes from the overlapping portion with the display region P 4 when viewed in a plan view when the patterned retardation layer 3 is planarly overlapped with the display region P 4 of the liquid crystal panel P. It is formed larger than the display area P4. The first region 3R and the second region 3L are provided not only in a portion overlapping the display region P4 but also in a surplus region.

  Returning to FIG. 2, the polarizing film F11 and the optical member 1 are bonded to the liquid crystal panel P so that the polarizing film F11 and the polarizer layer 2 of the optical member 1 are in a crossed Nicols arrangement.

  A protective film PF is bonded to the surface of the optical member 1 on the patterned retardation layer 3 side. The protective film Pf protects the surface of the optical member 1 and is provided to be peelable from the optical member 1.

  As the protective film Pf, a film obtained by forming an adhesive / peelable resin layer or an adhesive resin layer on a transparent resin film to give weak adhesiveness is used. Examples of the transparent resin film include extruded films of thermoplastic resins such as polyethylene terephthalate, polyethylene naphtholate, polyethylene, and polypropylene, co-extruded films combining them, and films obtained by stretching them uniaxially or biaxially. be able to. As the transparent resin film, it is preferable to use polyethylene terephthalate or polyethylene uniaxially or biaxially stretched film which is excellent in transparency and homogeneity and is inexpensive.

  In many cases, the protective film Pf is birefringent because the resin is oriented in the flow direction or the stretching direction of the molten resin during molding. The birefringence of such a protective film Pf is not uniform in the plane. Therefore, when the optical member 1 whose surface is protected by the protective film Pf is bonded to the liquid crystal panel P, optical detection of the optical member 1 may be difficult due to the optical characteristics of the protective film Pf.

  The liquid crystal panel P to which the polarizing film F11 and the optical member 1 are bonded becomes the display device 100 by further incorporating a drive circuit, a backlight unit, and the like (not shown).

The driving method of the liquid crystal panel P is known in this field such as TN (Twisted Nematic), STN (Super Twisted Nematic), VA (Vertical Alignment), IPS (In-Plane Switching), OCB (Optically Compensated Bend), and the like. Various modes can be adopted. Among these, an IPS liquid crystal panel P can be preferably used.
The display device 100 manufactured by the method for manufacturing an optical display device according to the present embodiment has the above-described configuration.

<Method for manufacturing optical display device>
4-11 is explanatory drawing of the manufacturing method of the optical display device of this embodiment. In the manufacturing method of the optical display device of the present embodiment, the liquid crystal panel P and the optical member 1 are bonded based on the relative position between the reference position of the liquid crystal panel P and the reference position of the optical member 1.

(Detection of the pixel row at the center of the display area P4)
As the reference position of the liquid crystal panel P, the pixel row at the center of the display area P4 is used.
For example, as shown in FIG. 4, an imaging area PA set around the corner of the liquid crystal panel P is imaged using a plurality of imaging devices (not shown). The captured image includes an alignment mark Am. Image data of the captured image is input to the arithmetic device, and image processing for emphasizing the alignment mark Am is appropriately performed. Based on the image data, the coordinates of the alignment mark Am are detected.

  Thereafter, the center position PC1 of the four alignment marks Am and the center positions PC2 and PC3 of the pair of alignment marks Am facing in the width direction of the liquid crystal panel P are calculated from the line segment connecting the coordinates of the detected alignment marks Am. The Based on these positions, the position of the pixel row at the center of the display area P4 is detected.

  Depending on the set position of the display area P4 with respect to the outer shape of the liquid crystal panel P, the center position PC1 or the center positions PC2 and PC3 obtained from the coordinates of the alignment mark Am may not be the center position of the display area P4. is there. In that case, based on the design value of the liquid crystal panel P, a deviation amount between the true center position or the center position and the calculated center position PC1 or the center positions PC2 and PC3 is set in advance as an offset amount. It is preferable to use the calculated value offset.

(Detection of the center position of the optical member 1)
As the reference position of the optical member 1, the first region located at the center in the width direction of the patterned retardation layer 3 is used.

  As a result of the inventor's investigation, it is known that the display quality of the optical member 1 may be deteriorated when a geometrically calculated position such as the liquid crystal panel P is adopted as the center position. The reason is as follows.

  First, in the FPR type 3D liquid crystal display device, the optical member and the liquid crystal panel are arranged in a state where the first region and the second region of the patterned retardation layer 3 correspond to the pixel column of the liquid crystal panel in a one-to-one correspondence. It is necessary to paste. This is because if the first region and the second region are arranged so as to overlap one pixel column, it causes crosstalk.

  On the other hand, in the optical member 1, the side in the longitudinal direction of the optical member 1 may not be parallel to the extending direction of the first region and the second region.

  For example, the optical member 1 may be manufactured in large quantities by a roll-to-roll method. Specifically, a layer of photo-alignable material is formed on the surface of a strip-shaped film original fabric, and the film original fabric is rolled and conveyed alternately in a direction crossing the conveyance direction. By exposing the two types of polarized light that are arranged, two types of polarization patterns (first region and second region) corresponding to the two types of polarized light are formed and used as the raw material of the optical member. An optical member is manufactured by appropriately cutting the raw material.

  However, in such a roll-to-roll system, the original film may meander during roll conveyance. Therefore, the first region and the second region formed by exposing the meandering film original may be formed to be curved. In this case, the side in the longitudinal direction of the optical member 1 and the extending direction of the first region and the second region are not parallel.

  Moreover, due to the accuracy of the cutting process performed according to the shape of the liquid crystal panel P, the side in the longitudinal direction of the optical member 1 may not be parallel to the extending direction of the first region and the second region. .

  For these reasons, at the position calculated geometrically from the shape of the optical member 1, the first region and the second region of the patterned retardation layer 3 do not necessarily overlap with the pixel column in a one-to-one correspondence. It will not be limited.

  For the above reason, when the optical member 1 is bonded to the liquid crystal panel P, the polarization pattern of the patterned retardation layer 3 at the center position of the optical member 1 is detected, and the polarization pattern corresponds to the pixel column of the liquid crystal panel P. It is necessary to have a technique for bonding.

  The first region and the second region of the patterned retardation layer 3 at the center position of the optical member 1 are imaged while transmitting polarized light using the difference in optical characteristics between the first region and the second region, The detected image is optically detected.

  However, since the optical member 1 has a polarizer layer, the light transmittance is low, the captured image tends to be dark, and the birefringence of the protective film attached to the surface of the optical member 1 is uniform in the plane. Due to the fact that it is not like, analysis of the captured image has been difficult.

Therefore, in this embodiment, the boundary between the first region and the second region is detected on one end side and the other end side in the width direction of the optical member 1 (detection step), and detected on one end side and the other end side. Based on the position of the boundary, the first region located at the center in the width direction of the patterned retardation layer 3 is determined (determination step).
Hereinafter, it demonstrates in order.

(Detection process)
As shown in FIG. 5, using a plurality of imaging devices (not shown), one end 11 in the width direction of the optical member 1 at both longitudinal ends (indicated by reference numerals 13 and 14) and the central portion of the optical member 1; The other end 12 and the imaging areas PA1 to PA9 set in the center are imaged. Each imaging area includes imaging areas PA1 to PA3 set at the end 13 in the longitudinal direction of the optical member 1, imaging areas PA4 to PA6 set at the end 14 in the longitudinal direction of the optical member 1, and the longitudinal direction of the optical member 1. The imaging areas PA7 to PA9 set in the center of the direction are each a set.

  As shown in FIG. 6, at the end portion 13 in the longitudinal direction of the optical member 1, first, based on the image captured in the imaging area PA <b> 1, the first area 3 </ b> Ra and the second area 3 </ b> La included in the imaging area PA <b> 1. The boundary Ba is detected. Whether the first region 3Ra is the first region from the one end 11 of the optical member 1 or what second region from the one end 11 of the optical member 1 is the second region 3La is the imaging region PA1. Based on the set position and the design of the optical member 1.

  Further, based on the image captured in the imaging area PA2, a boundary Bb between the first area 3Rb and the second area 3Lb included in the imaging area PA2 is detected. The number of the first region from the other end 12 of the optical member 1 is the first region 3Rb, and the number of the second region from the other end 12 of the optical member 1 is the second region 3Lb. This is known based on the setting position of the region PA2 and the design of the optical member 1.

  The boundary Ba can be detected, for example, by binarizing the captured image and smoothing the black and white boundary portion. The same applies to the boundary Bb.

  By detecting the boundaries Ba and Bb in this way and performing subsequent position detection based on the detected boundaries Ba and Bb, the polarization pattern of the patterned retardation layer 3 can be detected regardless of the outer shape of the optical member 1. The position can be accurately detected.

(Decision step: determination of the first region in the center)
Next, the center position in the width direction of the patterned retardation layer 3 is calculated based on the positions of the boundaries Ba and Bb detected on the one end 11 side and the other end 12 side. In FIG. 6, the calculated center position is indicated by a symbol Bx. The center position Bx is included in the imaging area PA3 set at the center in the width direction of the optical member 1.

  Here, the “center in the width direction of the patterned retardation layer 3” is the center in the width direction in the portion of the patterned retardation layer 3 that overlaps the display area P4 of the liquid crystal panel P in a plane. In the following description, the portion of the patterned retardation layer 3 that overlaps the display region P4 of the liquid crystal panel P in a plane is referred to as an “effective region”.

  For example, in the optical member 1, the number of first regions and second regions disposed in the surplus region from the boundary Ba to the end on the one end 11 side of the effective region, and the side of the other end 12 of the effective region from the boundary Bb. If the number of the first area and the second area arranged in the surplus area up to the end of the area is different, the number of the first area and the second area arranged in the surplus area is taken into consideration. The position Bx is calculated.

  Next, based on the image captured in the imaging area PA3, the first area 3Rc arranged so as to overlap the center position Bx is detected, and the first area 3Rc in the center of the effective area is determined.

  In the captured image, the first area and the second area appear to have different colors and brightness, so that the first area and the second area can be distinguished. However, due to the birefringence of the protective film, the second region appeared relatively brighter than the first region in one region, while the second region was relatively brighter in the other regions. The phenomenon that the first region looks brighter than that occurs, and there is a risk that accuracy may be reduced during detection based on the captured image.

  However, as described above, the center position of the effective area is predicted from the boundaries Ba and Bb, and the first area arranged at the predicted position is determined to be the first area in the center of the effective area, thereby capturing the captured image. The first area at the center of the effective area can be determined without being confused by the appearance of

(Decision process: detection of the center line)
Next, an approximate center line in the width direction of the first region 3Rc is obtained based on the image captured in the imaging region PA3. 7 and 9 are explanatory diagrams showing a method for obtaining the center line, and FIG. 8 is a flowchart showing a method for obtaining the center line. In the following description, the corresponding operation steps will be described with reference to the flowchart shown in FIG.

  First, as shown in FIG. 7A, the width of the first region 3Rc is measured at a plurality of measurement points based on the image captured in the imaging region PA3 (step S1). For example, the captured image is converted to grayscale, and the distance W between the boundaries Bc and Bd in the width direction of the first region 3Rc is measured at a plurality of locations.

  In the figure, the boundaries Bc and Bd are shown as straight lines for convenience, but in the captured image, the boundaries Bc and Bd are not straight lines. For this reason, the distances W measured at a plurality of locations have different values. Further, depending on the image, there may be a part where the boundaries Bc and Bd are unclear, and the distance W cannot be measured at such a part.

  Therefore, a threshold (first threshold) is provided for the number of measurement points that can be measured effectively, and the number of measurement points that can be measured effectively and the threshold are compared (step S2).

  If the measurement points that can be measured effectively are equal to or greater than the threshold, the coordinates of the center position D of the width are calculated at the measurement points that can be measured effectively (step S3), and the first region is calculated from the coordinates of the plurality of center positions D. The center line C1 in the width direction of 3Rc is approximated (step S4). As the approximation, a generally known statistical method can be used. For example, an approximation method for obtaining a regression line (approximate line) using the least square method can be given.

  FIG. 7B is a graph showing the approximate center line C1, and the center line C1 is shown as Y = 0.

  Here, in the figure, the point D1 plotted on the + y side and the point D2 plotted on the -y side have a larger separation distance from the center line C1 than the other points D, and the calculation result of the center line C1 It is thought that it has had a big influence on. In such a case, a determination is made based on a preset threshold value (second threshold value) (step S5), and measurement data of measurement spots (point D1 and point D2) having a larger separation distance than the second threshold value are deleted. (Step S7) The center line may be approximated again using the remaining points excluding the points D1 and D2. Thereafter, the number of measurement points remaining after excluding measurement points that are far away from the center line C1 is compared with the first threshold value (step S2), and subsequent processing is determined.

  On the other hand, when there is no measurement point that is far away from the center line C1, the variation in the center position D is evaluated based on a preset threshold value (third threshold value) with respect to the separation distance of the center position D from the center line C1 (step S1). S6). The third threshold value is smaller than the second threshold value. In FIG. 7B, the third threshold value is indicated by a symbol M. When the variation in the center position D is within the range defined by the threshold value, the obtained center line C1 is determined as the center line of the first region 3Rc.

  When the measurement point that can be measured effectively is less than the threshold value in the determination in step S2, and in the determination in step S6, there is a center position D that is separated from the center line C1 by a distance greater than the third threshold value. Then, the imaging region is changed to a different position along the extending direction of the first region 3Rc, and imaging is performed (step S8), and the width is measured again at a plurality of locations based on the obtained image (step S1).

  The above processing is performed on the imaging regions PA1 to PA3 set at the end portion 13 in the longitudinal direction of the optical member 1, the imaging regions PA4 to PA6 set at the end portion 14 in the longitudinal direction of the optical member 1, and the optical member 1. This is performed for each of the imaging regions PA7 to PA9 set in the center in the longitudinal direction.

  When changing the imaging area, as shown in FIG. 9, the optical member 1 is divided into three areas AR1, AR2, AR3 in the longitudinal direction, and the imaging area is set so as not to protrude from each area. It is good to change. At that time, the imaging areas PA3 and PA6 at both ends in the longitudinal direction may be changed to the center side of the optical member 1 like the imaging areas PA31 and PA61, respectively. The imaging area PA9 at the center in the longitudinal direction is changed to the imaging area PA91, for example, and when it needs to be changed, the imaging area PA9 is changed to the imaging area PA92. It is better to change the imaging area.

  When the imaging area is changed, the imaging areas before and after the change may not overlap as in the imaging area PA3 and the imaging area PA31, and the imaging area PA6 and the imaging area PA61. As in the imaging areas PA91 and PA92, the imaging areas before and after the change may partially overlap.

(Bonding process)
Then, as shown in FIG. 10, the liquid crystal panel P and the optical member 1 are bonded. At that time, based on the relative position between the pixel row located in the center of the liquid crystal panel P in the width direction and the determined center line of the first region 3Rc, both are bonded. In the figure, an xyz coordinate system is set, the longitudinal direction of the liquid crystal panel P is indicated as the x direction, the width direction of the liquid crystal panel P is indicated as the y direction, and the direction orthogonal to the xy plane is indicated as the z direction.

  Specifically, as shown in FIG. 11A, the optical member 1 is based on the center lines C1 and C2 at the end in the longitudinal direction of the optical member 1 and the center line C3 at the center in the longitudinal direction. The orientation of the optical member 1 is adjusted by controlling the relative orientation θ within the bonding surface between the optical member 1 and the liquid crystal panel. At this time, the rotation axis for angle adjustment is an axis in the same direction as the z axis, and the rotation center is, for example, a position overlapping the center line C3. The center line at the end in the longitudinal direction used for angle adjustment may be either one of the center lines C1 and C2.

  Further, as shown in FIG. 11B, the relative position of the optical member 1 and the liquid crystal panel in the width direction is controlled based on the center line C3 in the central portion in the longitudinal direction, and the attitude of the optical member 1 Adjust. In the figure, the optical member 1 is shown as being moved in the y direction.

  Since the user of the display device most closely observes the vicinity of the center of the display area, the user is likely to notice when crosstalk occurs in the center of the display area. On the other hand, as in the present embodiment, the position adjustment of the optical member 1 is performed with reference to the center line C3 of the optical member 1, and the pixel line positioned at the center in the width direction of the liquid crystal panel P and the center line C3 When both are bonded based on the relative position, the optical member 1 and the liquid crystal panel are bonded with the highest accuracy in the center of the display area. Therefore, the display device manufactured by the manufacturing method of the present embodiment is less likely to cause crosstalk at the center of the display area, and can display a high-quality image.

  That is, according to the manufacturing method of the optical display device having the above configuration, the optical member and the liquid crystal panel are bonded with high positional accuracy, and high-quality image display is possible.

  In the present embodiment, the polarization pattern that transmits the right-eye image is the first region 3R. However, the position detection or the like may be performed by setting the polarization pattern that transmits the left-eye image as the first region. I do not care.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Optical member, 3 ... Patterned phase difference layer (retardation layer), 3L, 3La, 3Lb ... 2nd area | region, 3R, 3Ra, 3Rb, 3Rc ... 1st area | region, 11 ... one end, 12 ... other end, 13 , 14 ... end, 100 ... display device (optical display device), Ba, Bb ... boundary, Bx ... center position, C1 to C3 ... center line, D ... center position, L ... pixel row, P ... liquid crystal panel ( Optical display component), P4 ... display area

Claims (3)

A plurality of first regions for changing the incident linearly polarized light to the first polarization state; and a plurality of second regions for changing to the second polarization state, the plurality of the first regions and the plurality of the second regions. An optical display device manufacturing method in which an optical member including a retardation layer formed by extending a region in a band shape in a plan view is bonded to an optical display component having a plurality of pixel rows,
The retardation layer is alternately arranged in a direction in which the first region and the second region intersect the extending direction of the first region and the second region,
In at least one end and center portion of the retardation layer in the extending direction, the retardation layer and the display area of the optical display component are located in the center of the intersecting direction in a portion overlapping in a plane. A determination step of determining a center line in the width direction of one region;
The optical member and the optical display component are affixed based on a relative position between the center line in the central portion and a pixel row positioned in the central portion in the intersecting direction of the optical display component. The manufacturing method of the optical display device which has the bonding process to combine.   In the bonding step, based on the center line in at least one end of the extending direction and the center line in the central portion, in the bonding surface of the optical member and the optical display component The manufacturing method of the optical display device of Claim 1 which controls and laminates | stacks the relative azimuth | direction.   In the bonding step, the optical member and the optical display component are based on a relative position between the center line in the central portion and a pixel row located in the central portion in the intersecting direction. The method for manufacturing an optical display device according to claim 1, wherein the relative position in the width direction is controlled.

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