KR20160122132A - Method for manufacturing optical display device - Google Patents

Abstract

A manufacturing method of an optical display device according to the present invention is a manufacturing method of an optical display device comprising an optical member (1) having a phase difference layer formed by extending a plurality of first regions and a plurality of second regions in a belt- (Bx (x, y)) in the crossing direction at a portion where the retardation layer and the display region of the liquid crystal panel are overlapped in a planar manner on one end side and the other end side in the width direction of the liquid crystal panel, (Bx) for calculating a center position (Bx) based on the reference positions (Ba) and (Bb), and calculating a center position (1) and the liquid crystal panel (2) on the basis of the determined first region (3Rc) and the relative position of the pixel row positioned at the center in the direction crossing the liquid crystal panel As shown in Fig.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical display device,

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

The present application claims priority based on Japanese Patent Application No. 2014-29547 filed on February 19, 2014, the contents of which are incorporated herein by reference.

Recently, 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 on the viewer side. Further, a polarizing film is further disposed on the backlight side of the liquid crystal panel.

The polarizer layer is a layer having an optical function of absorbing the polarized component of the vibration surface parallel to the absorption axis of the polarizer layer among the light incident from the liquid crystal panel side and transmitting the polarized component of the orthogonal vibration surface. 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 has a first region and a second region. The first region and the second region are each formed in a band shape and alternately arranged in correspondence with the pixel arrangement of the liquid crystal panel formed in the matrix shape.

12 is a plan view for explaining the alignment of the liquid crystal panel P and the patterning phase difference layer 3 in the 3D liquid crystal display device.

12, in the liquid crystal panel P, the red pixel R, the green pixel G, and the blue pixel B are periodically arranged along the long side (the horizontal direction of the liquid crystal panel P in Fig. 12) Are arranged side by side. A plurality of pixels R, G and B of the respective colors are arranged in parallel along the direction of the left and right in the pixel column L. The pixel columns L are arranged above and below the display region of the liquid crystal panel P (The longitudinal direction of the sheet P).

On the other hand, the patterned phase difference layer 3 includes a plurality of first regions 3R and a plurality of second regions 3R extending in the long side of the patterned phase difference layer 3 (right and left in FIG. 12: 3L. A plurality of first regions 3R and second regions 3L are arranged in the vertical direction (vertical direction in FIG. 12) corresponding to the respective pixel columns L of the liquid crystal panel P. For example, the first region 3R is arranged on the viewer side of the pixel column L displaying the right eye image, and the second region 3L is arranged on the viewer side of the pixel column L displaying the left eye image . In the first region 3R and the second region 3L, the direction of the phase difference is different, and the right eye image and the left eye image have different polarized states and are displayed on the viewer side (see Patent Document 1, for example).

The patterned phase difference 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, Thereby constituting a FPR-type 3D liquid crystal display device using the panel P.

The user selectively observes the right eye image in the right eye and the left eye image in the left eye by viewing a display image through so-called polarization glasses equipped with optical elements having different optical characteristics in the right eye lens and the left eye lens . Accordingly, the user can recognize the stereoscopic image in which the images of both eyes are fused.

Patent Document 1: JP-A-2012-212033

In manufacturing the FPR type 3D liquid crystal display device as described above, the first region of the patterned phase difference layer and the pixel column of the liquid crystal panel, or the second region and the pixel column are precisely associated with each other, and the patterned phase difference layer and the polarizer Layer is bonded to the liquid crystal panel. At that time, when both the first region and the second region of the patterned phase difference layer overlap with one pixel column, a so-called crosstalk occurs in which the right eye image, which should be originally recognized only by the right eye, is recognized in the left eye, The image quality of the stereoscopic display image may be deteriorated.

However, there is a fear that relative positions and orientations after the optical member and the liquid crystal panel are bonded due to manufacturing errors of the optical member, deformation of the optical member, and low optical detection accuracy for positioning at the time of bonding.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical display device manufacturing method capable of displaying an image with high quality by bonding an optical member and a liquid crystal panel with high positional accuracy.

According to an aspect of the present invention, there is provided a liquid crystal display device having a plurality of first regions for changing incident linearly polarized light into a first polarized light state and a plurality of second regions for changing into a second polarized light state, A method of manufacturing an optical display device which joins an optical member having a phase difference layer formed by extending the first region and a plurality of the second regions in a band shape in plan view to an optical display component having a plurality of pixel columns , The retardation layer is arranged such that the first region and the second region are alternately arranged in a direction intersecting the extending direction of the first region and the second region, and the one end side and the other end side in the crossing direction A reference position for calculating the position of the center of the intersecting direction in a portion where the display region of the optical retardation layer and the display region overlap in a plane is defined as A determination step of calculating the position of the center on the basis of the reference position detected at the one end side and the reference position detected at the other end side and determining the first region disposed at the center position; And a joining step of joining the optical member and the optical display component on the basis of the relative positions of the first region and the pixel column positioned at the center of the crossing direction of the optical display component to provide.

In one embodiment of the present invention having the above arrangement, in the determining step, the determined first area is imaged, the determined width of the first area is measured at a plurality of locations based on the obtained image, And a center line in the width direction of the determined first region in the image is approximated from a plurality of the coordinates. In the joining step, the central line and the center of the crossing direction And the optical member and the optical display component are bonded to each other based on the relative position of the pixel row positioned.

In one embodiment of the present invention having the above configuration, in the crystal step, when the number of measurement points capable of measuring the width is smaller than the first threshold value, And the width may be re-measured at a plurality of locations based on the obtained image.

In one embodiment of the present invention having the above-described configuration, in the determining step, of the measurement points where the width can be measured, the measurement position where the distance between the center position and the center line is larger than the second threshold value , The center line may be excluded from a plurality of the coordinates for approximating the center line, and the center line may be approximated again.

In one embodiment of the present invention having the above-described structure, in the crystal step, when the distance of the center position with respect to the center line is larger than the third threshold value, And the width may be re-measured at a plurality of locations based on the obtained image.

In one embodiment of the present invention having the above configuration, the detecting step and the crystal step are performed at at least one end and a central part in the extending direction of the retardation layer, and in the bonding step, The manufacturing method may be such that the first area disposed at the center position calculated for each of the center portions and the pixel array positioned at the center of the intersection direction of the optical display component are associated with each other.

In one embodiment of the present invention having the above configuration, in the joining step, based on the center line at the center portion and the relative position of the pixel column positioned at the center portion as the center in the intersecting direction, And the optical display component may be bonded to each other.

In one embodiment of the present invention having the above-described configuration, in the joining step, the optical member and the optical display unit are arranged on the basis of the center line at at least one end in the extending direction and the center line at the center, And the relative orientation in the bonding surface of the component is controlled to be bonded.

In one embodiment of the present invention having the above configuration, in the joining step, based on the center line at the center portion and the relative position of the pixel column positioned at the center portion as the center in the intersecting direction, And the relative position of the optical display part in the width direction may be controlled.

According to the present invention, it is possible to provide a method of manufacturing an optical display device capable of bonding an optical member and a liquid crystal panel with high positional precision and capable of high-quality image display.

1 is a plan view showing a schematic configuration of a display device.
2 is a cross-sectional view showing a schematic configuration of a display device.
Fig. 3 is a schematic plan view of the patterned retardation layer. Fig.
4 is an explanatory diagram of a manufacturing method of the optical display device of the present embodiment.
5 is an explanatory view of a method of manufacturing an optical display device according to the present embodiment.
6 is an explanatory diagram of a method of manufacturing an optical display device according to the present embodiment.
7A is an explanatory diagram of a manufacturing method of an optical display device according to the present embodiment.
Fig. 7B is an explanatory diagram of a manufacturing method of the optical display device of the present embodiment.
8 is an explanatory diagram of a manufacturing method of the optical display device of the present embodiment.
Fig. 9 is an explanatory diagram of a manufacturing method of an optical display device according to the present embodiment.
10 is an explanatory diagram of a manufacturing method of an optical display device according to the present embodiment.
11A is an explanatory diagram of a manufacturing method of an optical display device according to the present embodiment.
11B is an explanatory diagram of a manufacturing method of the optical display device of the present embodiment.
12 is a plan view for explaining alignment of a liquid crystal panel and a patterned retardation layer in a 3D liquid crystal display device.

Hereinafter, a method of manufacturing an optical display device according to the present embodiment will be described with reference to the drawings. In all the drawings referred to in the following description, dimensions, ratios, and the like of the respective components are appropriately made different from each other in order to make the drawings easy to see.

<Optical display device>

1 to 3 are explanatory diagrams showing a display device (optical display device) 100 manufactured by the manufacturing method of an optical display device according to the present embodiment.

1 is a plan view showing a schematic structure of a display device 100. Fig. 2 is a cross-sectional view of the display device 100 taken along the line II-II in Fig. The display device 100 of the present embodiment is an FPR type 3D liquid crystal display device. 1 or 2, the display device 100 has 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 which forms a rectangular shape in a plan view, and a second substrate P1 which faces the first substrate P1 in a relatively small rectangular shape 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 conforming to the outer shape of the first substrate P1 at the time of planarization and a region which is moisture-proofed inside the outer periphery of the liquid crystal layer P3 at the time of planarization is referred to as a display region P4. .

On the four corners of the liquid crystal panel P in a plan view, alignment marks Am for positioning are provided. In Fig. 1, the alignment marks Am are provided on all the four corners. However, for example, three alignment marks in total may be provided on three corners of four corners, Two alignment marks may be provided.

On the backlight side of the liquid crystal panel P, a polarizing film F11 is bonded. The polarizing film F11 is bonded to the liquid crystal panel P through a pressure-sensitive adhesive layer (not shown). The polarizing film F11 has an optical function of absorbing the polarization component of the vibration surface parallel to the absorption axis among the incident light and transmitting the polarization component of the vibration surface orthogonal to the absorption axis. The transmitted light immediately after passing through the polarizing film F11 is linearly polarized light.

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

The polarizer layer 2 has an optical function of absorbing the polarization component of the vibration surface parallel to the absorption axis among the light incident from the liquid crystal panel P side and transmitting the polarization component of the vibration surface orthogonal to the absorption axis. Transmitted light immediately after passing through the polarizer layer 2 is linearly polarized light.

Fig. 3 is a schematic plan view of the patterned phase difference layer 3 of the optical member 1. Fig. 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 rectangular member in plan view.

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

The first region 3R and the second region 3L are formed so as to extend in the longitudinal direction of the patterned phase difference layer 3 and intersect the extending direction of the first region 3R and the second region 3L As shown in Fig. The widths of the first region 3R and the second region 3L are set in accordance with the size of the pixel of the liquid crystal panel P to be bonded and are, for example, about 400 mu m to 500 mu m.

In the following description, the extending direction of the first region 3R and the second region 3L in the patterned phase difference layer 3 is referred to as the "longitudinal direction" of the patterned phase difference layer 3, 3R and the second region 3L may be referred to as the &quot; width direction &quot; of the patterned phase difference layer 3 in some cases. That is, 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 phase difference layer 3 is formed so as to overlap with the display region P4 of the liquid crystal panel P in a planar manner, Quot; region &quot; of the display region P4 in plan view. The first region 3R and the second region 3L are provided not only to the portion overlapping the display region P4 but also to the surplus region. Here, the &quot; patterned phase difference layer (phase difference layer) 3 and the display region P4 of the liquid crystal panel (optical display part) P overlap in a planar manner &quot; (Polarizing layer 2) is interposed between the patterned retardation layer 3 and the liquid crystal panel P as shown in Fig.

2, the polarizing film F11 and the optical member 1 are bonded to the liquid crystal panel P such that the polarizing film F11 and the polarizer layer 2 of the optical member 1 are arranged in cross- do.

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

The protective film (Pf) is a film obtained by forming a tacky / peelable resin layer or a sticky resin layer on a transparent resin film and imparting weak tackiness thereto. Examples of the transparent resin film include extruded films of thermoplastic resins such as polyethylene terephthalate, polyethylene naphtholate, polyethylene and polypropylene, coextruded films obtained by combining these films, and films obtained by stretching these films uniaxially or biaxially. As the transparent resin film, it is preferable to use a monoaxially or biaxially stretched film of polyethylene terephthalate or polyethylene which is excellent in transparency and homogeneity and low in cost.

In the protective film (Pf), the resin is oriented in the flow direction and the stretching direction of the molten resin at the time of molding, and many of them have birefringence. The birefringence of the protective film (Pf) is not the same 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 due to the optical characteristic of the protective film Pf, May become difficult.

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 inserting a driving circuit and a backlight unit not shown.

The driving method of the liquid crystal panel P is not limited to the driving method of the liquid crystal panel P such as a twisted nematic (TN), a super twisted nematic (STN), a vertical alignment (VA), an in-plane switching (IPS), an optically compensated bend Various modes known in the art can be employed. Among them, the liquid crystal panel P of the IPS system can be suitably used.

The display device 100 manufactured by the manufacturing method of the optical display device of the present embodiment has the above-described structure.

<Manufacturing Method of Optical Display Device>

Figs. 4 to 11A and Fig. 11B are explanatory views of a manufacturing method of the optical display device of the present embodiment. The liquid crystal panel P and the optical member 1 are bonded to each other on the basis of the relative positions of the bonding reference of the liquid crystal panel P and the bonding reference of the optical member 1 in the manufacturing method of the optical display device of the present embodiment do.

(Detection of the pixel column at the center of the display area P4)

As a bonding reference of the liquid crystal panel P, a pixel column at the center of the display area P4 is used.

For example, as shown in Fig. 4, a plurality of image pickup devices (not shown) are used to pick up an image pickup area PA set around the corner of the liquid crystal panel P. [ The captured image includes the alignment mark Am. The image data of the picked-up image is input to the arithmetic unit, and image processing for emphasizing the alignment mark Am is appropriately performed. The coordinates of the alignment mark Am are detected based on the image data.

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

The center position PC1 and the center positions PC2 and PC3 obtained from the coordinates of the alignment mark Am are displayed on the display region P4 in accordance with the setting position of the display region P4 with respect to the outer shape of the liquid crystal panel P. The center position of the region P4 may not be located. In this case, based on the design value of the liquid crystal panel P, the offset amount between the true center position and the calculated center position PC1 and the center positions PC2 and PC3 is previously set as the offset amount, Offset.

(Detection of the center position of the optical member 1)

As a reference of the optical member 1, a first region located at the center in the width direction of the patterned phase difference layer 3 is used.

It has been found by the inventors of the present invention that if the geometrically calculated position of the optical member 1, such as the liquid crystal panel P, is adopted as the center position, the display quality may deteriorate. The reason is as follows.

First, in the FPR type 3D liquid crystal display device, the optical member and the liquid crystal panel are bonded together in a state in which the first region and the second region of the patterned phase difference layer 3 correspond to the pixel column of the liquid crystal panel in a one- There is a need. This is because, if the first region and the second region overlap with each other for one pixel column, it causes crosstalk.

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

For example, the optical member 1 may be mass-produced by a roll-to-roll method. Specifically, a layer of a photo-orientable material is formed on the surface of a strip-shaped film master, and two kinds of photo-alignment materials alternately arranged in a direction crossing the transport direction are formed on the layer of photo- Two kinds of polarization patterns (first region and second region) corresponding to the two types of polarized light are formed by exposing the polarized light to form the disc of the optical member. Then, the disc is appropriately cut to manufacture an optical member.

However, in such a roll-to-roll system, the original film may be skewed during roll transportation. Therefore, the first region and the second region which are formed by exposure to a meandering film original may also be curved. In this case, the side in the longitudinal direction of the optical member 1 is not parallel to the extending direction of the first region or the second region.

In addition, due to the precision of the cutting process performed in accordance with the shape of the liquid crystal panel P, the longitudinal direction of the optical member 1 may not be parallel to the extending direction of the first region or the second region .

For this reason, at the positions geometrically calculated from the shape of the optical member 1, the first region and the second region of the patterned phase difference layer 3 do not always overlap one-on-one with the pixel columns.

For this reason, when the optical member 1 is bonded to the liquid crystal panel P, the polarization pattern of the patterned phase difference layer 3 at the center position of the optical member 1 is detected, There is a need for a technique of joining the pixel rows of the panel P in correspondence with each other.

The first region and the second region of the patterned phase difference layer 3 at the center position of the optical member 1 are picked up while transmitting the polarized light using the difference in optical characteristics of the first region and the second region , And optically detects the image using the sensed image.

However, since the optical member 1 has a polarizer layer, the optical transmittance is low, the image that is picked up easily becomes dark, and the birefringence of the protective film Pf attached to the surface of the optical member 1 It was difficult to interpret the captured image due to the same reason.

Therefore, in the present embodiment, the boundary between the first area and the second area is detected (detection step) at one end side and the other end side in the width direction of the optical member 1, Based on the position of the detected boundary, a first region located at the center in the width direction of the patterned phase difference layer 3 is determined (a crystal process).

Hereinafter, description will be made in order.

(Detection step)

5, the optical member 1 is provided at both ends (indicated by reference numerals 13 and 14) in the longitudinal direction of the optical member 1 and at the central portion thereof by using a plurality of image pickup devices (not shown) The image pickup areas PA1 to PA9 set at the one end 11, the other end 12 and the center in the width direction of the image pickup device 1 are respectively picked up. Each imaging region is formed by the imaging regions PA1 to PA3 set at the end portion 13 in the longitudinal direction of the optical member 1 and the imaging regions PA4 to PA6 set at the end portion 14 in the longitudinal direction of the optical member 1, And imaging regions PA7 to PA9 set at the center in the longitudinal direction of the optical member 1 are respectively set.

6, at the end portion 13 in the longitudinal direction of the optical member 1, a first area (first area) included in the sensing area PA1 is determined based on the image picked up in the sensing area PA1 (Reference position) Ba between the first area 3Ra and the second area 3La. The first region 3Ra is the first region from the one end 11 of the optical member 1 and the second region 3La is the second region 3La from the one end 11 of the optical member 1, 2 area is already known based on the setting position of the imaging area PA1 and the design of the optical member 1. [

A boundary (reference position) Bb between the first area 3Rb and the second area 3Lb included in the imaging area PA2 is detected based on the image picked up in the imaging area PA2. The first region 3Rb is the first region from the other end 12 of the optical member 1 and the second region 3Lb is the second region 3Lb from the other end 12 of the optical member 1, 2 area is already known based on the setting position of the imaging area 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 boundary portion of black and white. This also applies to the boundary Bb.

Thus, by detecting the boundaries Ba and Bb and performing the subsequent position detection based on the detected boundaries Ba and Bb, the patterned phase difference layer 3 (B) is obtained irrespective of the outer shape of the optical member 1 It is possible to accurately detect the position of the polarizing pattern of the projection optical system.

(Crystal process: crystal of the first region in the center)

Subsequently, the position of the center in the width direction of the patterned phase difference layer 3 is calculated based on the positions of the boundaries Ba and Bb detected at the side of the end 11 and the side of the other end 12. In Fig. 6, the calculated center position is indicated by reference sign 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. [

The term &quot; center in the width direction of the patterned phase difference layer 3 &quot; means a width of the patterned phase difference layer 3 in the widthwise direction at a portion overlapping the display region P4 of the liquid crystal panel P in plan view Center. In the following description, a portion of the patterned phase difference layer 3 that overlaps with the display region P4 of the liquid crystal panel P in a plan view is referred to as &quot; effective region &quot;.

For example, in the optical member 1, the number of the first area and the second area arranged in the redundant area from the boundary Ba to the end of the effective area at the side of the one end 11, When the number of the first region and the second region arranged in the redundant region to the end of the other end 12 of the region is different, the number of the first region and the second region arranged in these redundant regions, (Bx).

Subsequently, based on the image picked up in the image pickup area PA3, the first area 3Rc which is arranged to overlap the center position Bx is detected, and the first area 3Rc at the center of the effective area is determined .

In the captured image, since the colors and brightness of the first area and the second area are different from each other, it is possible to distinguish the first area from the second area. However, due to the birefringence of the protective film, in some areas, the second area is seen to be brighter than the first area, whereas in the other area, the first area is seen to be brighter than the second area , There is a possibility that the accuracy is lowered at the time of 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 as the first area at the center of the effective area, The first area at the center of the effective area can be determined without being deceived.

(Crystal process: detection of the center line)

Subsequently, the center line in the width direction of the first area 3Rc is approximated based on the image picked up in the imaging area PA3. Figs. 7A, 7B, and 9 are explanatory views showing a method of obtaining a center line, and Fig. 8 is a flowchart showing a method of obtaining a center line. In the following description, appropriate steps of the operation are shown with reference to the flowchart shown in Fig.

First, as shown in Fig. 7A, the width of the first area 3Rc is measured at a plurality of measurement points based on the image picked up in the image pickup area PA3 (step S1). For example, the picked-up image is converted to gray scale, and the distance W between the boundaries Bc and Bd in the width direction of the first area 3Rc is measured at a plurality of places.

In Fig. 7A, the boundaries Bc and Bd are shown as straight lines for the sake of convenience, but the boundaries Bc and Bd are not straight lines in the captured image. Therefore, the distances W measured at a plurality of locations are different from each other. Also, depending on the image, there are points where the boundaries Bc and Bd are unclear, and the distance W can not be measured in such a portion.

Therefore, a threshold value (first threshold value) is set with respect to the number of measurement points that can be effectively measured, and the number of measurement points that can be effectively measured is compared with a threshold value (step S2).

When the effective measurement point is equal to or larger than the first threshold value, the coordinates of the center position D of the width at the measurable measurement point are calculated (step S3) The center line C1 in the width direction of the first area 3Rc is approximated from the coordinates (step S4). As an approximate method, a known statistical method can be used. For example, a method of approximating a regression line (approximated straight line) using a least squares method can be mentioned. The lower limit of the number of measurement points that can be measured effectively, which is set as the first threshold value, can be appropriately set based on the specification of the patterned phase difference layer 3.

Fig. 7B is a graph showing an approximate center line C1 and showing the center line C1 as Y = 0.

7B, the distance D1 from the center line C1 is larger than the distance D from the point D plotted on the + y side and the point D2 plotted on the -y side, It is thought that it has a great influence on the result. In this case, determination is made based on a preset threshold value (second threshold value) (step S5), measurement data of the measurement spot (point D1 and point D2) having a larger distance from the second threshold value is deleted (step S7) The center line may be approximated again using the remaining points except the point D1 and the point D2. Thereafter, the number of remaining measurement points excluding the measurement point largely separated from the center line C1 is compared with the first threshold value (step S2), and the determination of the subsequent process is made. Here, the upper limit of the distance between the center positions, which is set as the second threshold value, can be appropriately set on the basis of the specification of the patterned phase difference layer 3, as in the case of the first threshold value.

On the other hand, in the case where there is no measurement point largely separated from the center line C1, on the basis of the preset threshold value (third threshold value), the center distance D of the center position D (Step S6). The third threshold value is smaller than the second threshold value. In Fig. 7B, the third threshold value is indicated by the symbol M. In Fig. When the variation of 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. The upper limit of the distance between the center positions, which is set as the third threshold value, can be appropriately set on the basis of the specification of the patterned phase difference layer 3, as in the first and second threshold values.

When the measurement point that can be measured effectively is less than the threshold value in the judgment of the step S2 and the central position D where the distance from the center line C1 is larger than the third threshold value in the judgment of the step S6, (Step S8), and the width is re-measured at a plurality of positions based on the obtained image (step S1).

The processing described above is carried out in such a manner that the image pickup areas PA1 to PA3 set at the longitudinal end 13 of the optical member 1 and the image pickup areas PA4 to PA6 set at the longitudinal end 14 of the optical member 1 And the imaging regions PA7 to PA9 set at the center in the longitudinal direction of the optical member 1, respectively.

9, the optical member 1 is divided into three areas AR1, AR2, and AR3 in the longitudinal direction, and the imaging area is divided into three areas AR1, AR2, and AR3 so as not to come out from the respective areas It is good to change. At this time, it is preferable to change the imaging area to the center side of the optical member 1, such as the imaging areas PA31 and PA61, with respect to the imaging areas PA3 and PA6 at both ends in the longitudinal direction. The imaging area PA9 at the center in the longitudinal direction is changed to the imaging area PA91 and the imaging area PA9 is changed to the imaging area PA92 It is preferable to change the imaging area to both sides in the longitudinal direction.

In the case of changing the imaging area, the imaging area before and after the change may not overlap with each other, such as the imaging area PA3 and the imaging area PA31, the imaging area PA6 and the imaging area PA61, The imaging area before and after the change may partially overlap, such as the imaging area PA9 and the imaging areas PA91 and PA92.

(Bonding step)

Then, as shown in Fig. 10, the liquid crystal panel P and the optical member 1 are bonded. At that time, both are bonded based on the relative positions of the pixel row positioned at the center in the width direction of the liquid crystal panel P and the determined center line of the first region 3Rc (see Fig. 7A). 10, the xyz coordinate system is set, and the longitudinal direction of the liquid crystal panel P is indicated as x direction, the width direction of the liquid crystal panel P as y direction, and the direction orthogonal to the xy plane as z direction.

Specifically, as shown in Fig. 11A, on the basis of the center lines C1 and C2 at the longitudinal end portion of the optical member 1 and the center line C3 at the central portion in the longitudinal direction, the optical member 1 ) And the relative azimuth [theta] in the joint surface of the liquid crystal panel are adjusted to adjust the posture of the optical member 1. [ At this time, the rotation axis of the angle adjustment is an axis in the same direction as the z-axis, and the rotation center is, for example, a position overlapping with the center line C3. The center line at the end in the longitudinal direction used for angle adjustment may be any of the center lines C1 and C2.

11B, the relative position of the optical member 1 and the liquid crystal panel in the width direction is controlled to adjust the posture of the optical member 1 based on the center line C3 at the center in the longitudinal direction, do. In Fig. 11B, the optical member 1 is moved in the y direction.

Since the user of the display device observes the vicinity of the center of the display area with the most care, when the crosstalk occurs at the center of the display area, the user is likely to notice. The position of the optical member 1 is adjusted with reference to the center line C3 of the optical member 1 and the position of the pixel row positioned at the center in the width direction of the liquid crystal panel P, When the two are bonded based on the relative positions of the center line C3, the optical member 1 and the liquid crystal panel are bonded most precisely at the center of the display region. Therefore, in the display device manufactured by the manufacturing method of this embodiment, crosstalk hardly occurs at the center of the display area, and high-quality image display becomes possible.

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

In the present embodiment, the polarizing pattern through which the right eye image is transmitted is the first region 3R. However, the position detection may be performed by setting the polarizing pattern transmitted through the left eye image as the first region.

In the present embodiment, a manufacturing apparatus for manufacturing the display device (optical display device) 100 is not shown, but the manufacturing apparatus is not limited at all. For example, as the manufacturing apparatus of the display apparatus 100, the assembling and conveying means for assembling these members while conveying the respective members in the process, and the operation of the assembling and conveying means are shown in the flowchart of Fig. 8 And an operation control unit for controlling the operation by the same operation as that described above.

While the preferred embodiments of the present invention have been described with reference to the accompanying drawings, it goes without saying that the present invention is not limited to these examples. Various shapes, combinations, and the like of the respective structural members shown in the above-described examples are merely examples, and can be variously changed based on design requirements and the like within a range not deviating from the main idea of the present invention.

1: optical member, 3: patterned retardation layer (phase difference layer), 3L, 3La, 3Lb: second region, 3R, 3Ra, 3Rb, 3Rc: first region, 11: A liquid crystal panel (optical display part), a liquid crystal panel (optical display part), and a liquid crystal panel (optical display part) P4: Display area

Claims (9)

A plurality of first regions for changing an incident linearly polarized light to a first polarization state and a plurality of second regions for changing a linearly polarized state to a second polarization state, A method of manufacturing an optical display device that joins an optical member having a retardation layer formed in a strip shape to an optical display component having a plurality of pixel columns,
The retardation layer is alternately arranged such that the first region and the second region intersect with the extending direction of the first region and the second region,
A reference position for calculating a position of a center of the crossing direction in a portion where the display region of the optical display component overlaps the display region of the optical display component on the one end side and the other end side in the intersecting direction A detection step,
A determination step of calculating the center position based on the reference position detected at the one end side and the reference position detected at the other end side and determining the first region disposed at the center position;
And a joining step of joining the optical member and the optical display component on the basis of the determined relative position of the first region and the pixel column positioned at the center of the crossing direction of the optical display component . The method according to claim 1, wherein in the determining step, the determined first area is imaged, the determined width of the first area is measured at a plurality of locations based on the obtained image, and the coordinates of the measured center position And a center line in the width direction of the determined first region in the image is approximated from a plurality of the coordinates,
Wherein the optical member and the optical display component are bonded to each other based on a relative position between the center line and a pixel column positioned at the center of the intersecting direction in the bonding step. 3. The method according to claim 2, wherein in the determining step, when the number of measurement points capable of measuring the width is smaller than a first threshold value, a different position along the extending direction in the first area is picked up, And the width is remeasured at a plurality of locations based on the widths of the plurality of areas. 4. The method according to claim 2 or 3, wherein, in the determining step, with respect to a measurement point where a distance between the center position with respect to the center line is larger than a second threshold value, From the plurality of coordinates for approximating the center line, and approximating the center line again. 4. The method according to claim 2 or 3, wherein in the determining step, when the distance of the center position with respect to the center line is larger than the third threshold, a different position along the extending direction in the first area is imaged And the width is remeasured at a plurality of locations based on the obtained image. The method according to claim 1 or 2, wherein at least one end portion and a central portion in the extending direction of the retardation layer perform the detecting step and the determining step,
In the joining step, the first region, which is located at the center position calculated in each of the end portion and the central portion, and the pixel column located at the center in the intersecting direction of the optical display component are associated with each other, Wherein the optical display device is formed of a transparent material. The optical display device according to claim 6, wherein in the joining step, the optical member and the optical display component are bonded to each other based on the center line at the center portion and the relative position of the pixel array positioned at the center portion as the center in the crossing direction Wherein the optical display device is formed of a transparent material. 9. The optical display device according to claim 7, wherein in the joining step, the relative orientation in the joining plane of the optical member and the optical display component, based on the centerline at the at least one end in the extending direction and the centerline at the center, To thereby form an optical display device. The liquid crystal display device according to claim 7 or 8, wherein in the joining step, on the basis of the center line at the center portion and the relative position of the pixel column positioned at the center portion as the center in the intersecting direction, And controlling the relative position of the display part in the width direction.

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