TW201534982A - Method of producing optical display device - Google Patents

Abstract

A method of producing an optical display device of the present invention in which an optical member 1 which is provided with a phase difference layer which is formed so that a plurality of first regions and a plurality of second regions extend so as to be band-shaped when viewed from above is adhered to a liquid crystal panel having a plurality of row of pixels, includes a detection step of detecting reference positions Ba and Bb in a first edge side and a second edge side in the width direction for calculating a center position Bx which is positioned in the center in a perpendicular direction in an area in which the phase different layer planarly overlaps with a display region of an optical display component, a determination step of calculating the center position Bx based on the reference positions Ba and Bb and determining a first region 3Rc which is disposed in the center position Bx, and an adhering step of adhering the optical member 1 to the liquid crystal panel based on a relative position of the determined first region 3Rc and the row of the pixels which is positioned in the center in the perpendicular direction of the liquid crystal panel.

Description

Optical display device manufacturing method

The present invention relates to a method of fabricating an optical display device. The present invention claims priority based on Japanese Patent Application No. 2014-29547, filed on Jan.

In recent years, a passive three-dimensional (3D, 3 dimenion) liquid crystal display device called a film patterned retarder (FPR) has been developed.

In the 3D liquid crystal display device (display device) of this embodiment, for example, a polarizing layer is disposed on the display surface side of the liquid crystal panel, and a patterned retardation layer is disposed on the observation side. Further, a polarizing film is disposed on the backlight side of the liquid crystal panel.

The polarizing layer is a layer having an optical function of absorbing the polarizing component of the parallel vibration surface of the light incident from the liquid crystal panel side on the absorption axis of the polarizing layer and penetrating the polarization component of the vertical vibration surface. The transmitted light after penetrating the polarizing layer is linearly polarized light.

Typically, a patterned retardation layer is formed on the substrate film. The patterned retardation layer has a first region and a second region. Each of the first region and the second region is formed in a strip shape, and corresponds to a pixel arrangement of the liquid crystal panels forming a matrix, and is arranged in an alternating manner.

Fig. 12 is a plan view for explaining a fitting position of the liquid crystal panel P and the patterned retardation layer 3 in the 3D liquid crystal display device.

As shown in FIG. 12, in the liquid crystal panel P, along the long side (the left and right sides of the liquid crystal panel P in FIG. 12: the lateral direction), the red pixel R, the green pixel G, and the blue pixel B are periodically arranged in parallel. Then, the pixels of each color (red pixel R, green pixel G, blue pixel B) are juxtaposed in the left-right direction into a pixel column L, and the pixel column L is over the display region of the liquid crystal panel P. (The longitudinal direction of the liquid crystal panel P in Fig. 12) is arranged in plural.

On the other hand, the patterned phase difference layer 3 has a plurality of first regions 3R and a plurality of second regions 3L extending along the long sides (left and right: lateral directions in FIG. 12) of the patterned phase difference layer 3. The first region 3R and the second region 3L are arranged in a plurality of columns (upward in the longitudinal direction in FIG. 12) over the respective pixel columns L of the corresponding liquid crystal panel P. For example, the first region 3R is disposed on the observation side of the pixel column L on which the right-eye screen is displayed, and the second region 3L is disposed on the observation side on which the pixel column L of the left-eye screen is displayed. The phase difference direction of the first region 3R and the second region 3L is different, and the right-eye image and the left-eye image are displayed on the observation side in a different polarization state (for example, see Patent Document 1).

The patterned retardation layer 3 is bonded to the liquid crystal panel P such that the boundary line K between the first region 3R and the second region 3L is positioned between the respective pixel columns L, and the liquid crystal panel P is used to constitute an FPR type 3D liquid crystal display device.

The right-eye lens and the left-eye lens of the polarized glasses include optical units having different optical characteristics, and the user views the display screen by so-called polarized glasses, and the right-eye-to-right-eye screen and the left-eye-left-eye screen are selectively selected. Observed. Thereby, the user can recognize the stereoscopic image after merging the images of the two eyes. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP-A-2012-212033

[Problems to be solved by the invention]

In the manufacturing of the FPR type 3D liquid crystal display device described above, after the first region or the second region of the patterned phase difference layer and the liquid crystal panel pixel column respectively correspond to each other correctly, the optical layer including the patterned phase difference layer and the polarizing layer is included. The components are attached to the liquid crystal panel. At this time, for one pixel column, if both the first region and the second region of the patterned phase difference layer are overlapped, the right eye image originally recognized by the right eye can also be recognized by the left eye, resulting in so-called crosstalk. It may cause the image quality of the stereoscopic display to drop.

However, the manufacturing position error of the optical component, the deformation of the optical component, the decrease in the optical detection accuracy determined by the position at the time of bonding, and the like may cause the relative position or direction of the optical component and the liquid crystal panel to be shifted.

In view of the above circumstances, an object of the present invention is to provide a method of manufacturing an optical display device capable of high-quality screen display, in which an optical component and a liquid crystal panel are bonded with high positional accuracy. [Means for solving problems]

In order to solve the above problems, an aspect of the present invention provides a method of manufacturing an optical display device, which is a method of manufacturing an optical component having an optical component having a plurality of pixel columns, the optical component having a phase difference layer. The phase difference layer has a plurality of first regions that change the incident linear polarization into a first polarization state and a second region that changes to a second polarization state, and the plurality of first regions and the plurality of second regions extend in a strip shape in a head-up manner Forming a phase difference layer; the first region and the second region of the phase difference layer are alternately arranged in a crossing direction of the extending direction of the first region and the second region; wherein the manufacturing method has: a detection process, and the intersection One of the direction end side and the other end side respectively detecting a reference position for calculating a central position of the intersection direction of the phase difference layer and the display area plane of the optical display member; determining a process based on the one end side and the other a reference position detected by each end side, the central position is calculated, and the first area disposed at the central position is determined; and the bonding process is performed. The first region is located and the determined relative position of the optical display pixel column direction of the center of the cross member, the bonding of the optical element and the optical display means.

In one aspect of the present invention having the above configuration, the manufacturing method is preferably based on the determination process, the first region determined by the imaging, and the width of the determined first region is measured at the plurality of positions based on the obtained screen, and the calculation is performed. a coordinate of a center position of the measured width, a plurality of coordinates approximating a center line of a width direction of the first region determined in the screen; and a bonding process based on the center line and a pixel column located at a center of the intersecting direction The phase difference layer and the optical display member are bonded to each other.

In one aspect of the present invention having the above configuration, the manufacturing method is preferably based on the determining process, and when the number of the measurement positions of the width is smaller than the first threshold value, the extending direction along the first region is captured. The different positions are measured again at the complex position based on the obtained picture.

In one aspect of the present invention having the above configuration, the manufacturing method is preferably based on the determination process, and the distance between the measurement positions of the widths and the center position of the center line is larger than the second threshold value. The position is measured, and is excluded from the complex coordinates for the center line, and the center line is again approximated.

In an aspect of the present invention having the above configuration, the manufacturing method is preferably performed in the determining process, and the filming along the center of the center line is larger than the third threshold value, and the filming is extended along the first region. The position differs in direction, and the width is measured again at the complex position based on the obtained picture.

In one aspect of the invention having the above-described configuration, the manufacturing method preferably performs at least one end portion and a central portion of the extending direction of the retardation layer to perform a detection process and a process for determining; and in the bonding process, The first region disposed at the central position calculated in each of the end portion and the central portion corresponds to a pixel column located at the center in the intersecting direction of the optical display member, and then bonded.

In one aspect of the present invention having the above configuration, the manufacturing method is preferably performed by the bonding process, and is based on the center line of the center portion and the relative position of the pixel column located at the center of the center in the intersecting direction. The optical component and the optical display component.

In one aspect of the present invention having the above configuration, the manufacturing method is preferably performed by the bonding process, and the optical component and the center line are controlled based on a center line of at least one end portion of the extending direction and a center line of the central portion. The relative orientation within the mating face of the optical display member is then applied.

In one aspect of the present invention having the above configuration, the manufacturing method is preferably controlled by the bonding process, and the center line of the center portion and the relative position of the pixel column located at the center of the center in the intersecting direction are controlled. The optical component and the relative position of the optical display member in the width direction. [Effects of the Invention]

According to the present invention, it is possible to provide a method of manufacturing an optical display device capable of high-quality screen display, in which an optical component and a liquid crystal panel are bonded with high positional accuracy.

Hereinafter, a method of manufacturing the optical display device according to the present embodiment will be described with reference to the drawings. In addition, in the drawings which are referred to in the following description, the size, the ratio, and the like of each constituent unit are appropriately changed in order to facilitate viewing of the drawings.

<Optical Display Device> FIGS. 1 to 3 are explanatory views showing the manufacture of the display device 100 (optical display device) by the method of manufacturing the optical display device of the embodiment.

1 is a plan view showing a schematic configuration of a display device 100. 2 is a cross-sectional view of the display device 100 in line II-II of FIG. 1. The display device 100 of the present embodiment is an FPR type 3D liquid crystal display device. As shown in FIG. 1 or FIG. 2, the display device 100 has a liquid crystal panel P (optical display member), a polarizing film F11, and an optical module 1.

As shown in FIG. 1 and FIG. 2, the liquid crystal panel P includes a first substrate P1 that is flat in a rectangular shape, a second substrate P2 that is disposed in a small rectangular shape on the first substrate P1, and a first substrate P1 that is sealed. The liquid crystal layer P3 is interposed between the second substrate P2. The liquid crystal panel P has a rectangular shape in a plan view along the outer shape of the first substrate P1, and an inner region which faces the outer periphery of the liquid crystal layer P3 in a plan view as the display region P4.

At the four corners of the head-up of the liquid crystal panel P, the calibration mark Am for determining the position is set. Although the calibration marks Am are all set in the four corners in FIG. 1, for example, three of the four corners may be provided with three calibration marks in total, and the diagonal positions of the four corners may be two or more.

The 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 by an adhesive layer (not shown). The polarizing film F11 has an optical function of absorbing a polarizing component of a parallel vibration surface of the incident light to the absorption axis and penetrating the polarization component of the vertical vibration surface. The transmitted light that has passed 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 unit 1 is bonded. The optical module 1 has a polarizing layer 2 and a patterned retardation layer 3 (phase difference layer), and the side surface of the polarizing layer 2 is bonded to the liquid crystal panel P to the liquid crystal panel P.

The polarizing layer 2 has an optical function of absorbing a polarizing component of a parallel vibration surface of the light incident from the liquid crystal panel P side on the absorption axis and penetrating the polarization component of the vertical vibration surface. The transmitted light that penetrates the polarizing layer 2 is linearly polarized light.

3 is a schematic plan view of a patterned phase difference layer 3 having an optical component 1. The patterned phase difference layer 3 has a plurality of first regions 3R and a plurality of second regions 3L. Moreover, the patterned phase difference layer 3 is a component which is rectangular in plan view.

The first region 3R changes the linearly polarized light that has passed through the polarizing layer 2 to, for example, a circularly polarized light that is rotated rightward (first polarized state). The second region 3L changes the linearly polarized light that has passed through the polarizing layer 2 to, for example, a circularly polarized light that is rotated leftward (second polarized state).

The first region 3R and the second region 3L are formed to extend in the longitudinal direction of the patterned phase difference layer 3, and are alternately arranged in the intersecting direction of the extending direction of the first region 3R and the second region 3L. The widths of the first region 3R and the second region 3L are set according to the pixel size of the liquid crystal panel P to be bonded, and are, for example, about 400 μm to 500 μm.

In the following description, the extending direction of the first region 3R and the second region 3L of the patterned phase difference layer 3 is referred to as the "longitudinal direction" of the patterned phase difference layer 3, and the first region 3R and the second region 3L are referred to. The arrangement direction is referred to as the "width direction" of the patterned phase difference layer 3. That is, the "longitudinal direction" described above corresponds to the "extension direction" of the present invention, and the "width direction" corresponds to the "cross direction" of the present invention.

In the display device 100, the patterned phase difference layer 3 is formed to be larger in the plan view than in the display region P4, so as to overlap the display region P4 when the patterned phase difference layer 3 overlaps the display region P4 of the liquid crystal panel P. Partially overflowing "remaining area". The first region 3R and the second region 3L are not only disposed in a portion overlapping the display region P4 but also in the remaining portion. Here, the "patterned retardation layer 3 (phase difference layer) and the display region P4 of the liquid crystal panel P (optical display member) are overlapped in the plane", for example, as shown in FIG. 2, Between the patterned retardation layer 3 and the liquid crystal panel P, a case where another layer (polarizing layer 2) is inserted is further included.

Referring back to FIG. 2 , the polarizing film F11 and the optical module 1 are bonded to the liquid crystal panel P by disposing the polarizing film F11 and the polarizing layer 2 of the optical module 1 in a substantially polarized manner.

The protective film Pf is bonded to the surface of the optical component 1 on the side of the patterned phase difference layer 3 side. The protective film Pf protects the surface of the optical component 1 and is detachably provided with respect to the optical component 1.

The protective film Pf is formed by forming an adhesive-repellent resin layer or an adhesive resin layer on a transparent resin film, and imparting weak adhesion. In the case of the transparent resin film, for example, an extruded film of a thermoplastic resin such as polyethylene terephthalate, polyethylene naphthalate, polyethylene, and polypropylene, and a combination of the above combinations A film, a film that stretches the above material in one or two axes, or the like. In the above-mentioned transparent resin film, it is preferable to use a polyethylene terephthalate or polyethylene one-axis or biaxially stretched film which is excellent in transparency and homogeneity and which is inexpensive.

The protective film Pf is oriented to the resin in the flow direction or the extending direction of the molten resin at the time of molding, and has a multi-folding property. The birefringence of such a protective film Pf is different from that in the plane. Therefore, in the case where the optical component 1 protecting the surface of the protective film Pf is bonded to the liquid crystal panel P, optical inspection of the optical component 1 becomes 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 unit 1 are bonded is further combined by a driving circuit, a backlight unit, and the like, which are not shown, to become the display device 100.

As for the driving method of the liquid crystal panel P, for example, TN, Twisted Nematic, SuperTwisted Nematic, Vertical Alignment, IPS, In-Plane Switching, Optically Compensated Bend (OCB), etc., various modes known in the art can be employed. Among them, an IPS type liquid crystal panel P can be preferably used. The display device 100 manufactured by the method of manufacturing an optical display device of the present embodiment has the above configuration.

<Method of Manufacturing Optical Display Device> Fig. 4-11 is an explanatory view showing a method of manufacturing the optical display device of the embodiment. In the method of manufacturing an optical display device of the present embodiment, the liquid crystal panel P and the optical module 1 are bonded together based on the relative positions of the reference position of the liquid crystal panel P and the reference position of the optical module 1.

(Detection of the pixel column at the center of the display region P4) The pixel position of the center of the display region P4 is used as the reference position of the liquid crystal panel P. For example, as shown in FIG. 4, a plurality of imaging devices (not shown) are used to capture the imaging area PA set around the corner of the liquid crystal panel P. The captured image contains the calibration mark Am. The screen material of the captured screen is input to the calculation device, and the screen processing of the emphasis calibration mark Am is appropriately applied. Based on the picture data, the coordinates of the calibration mark Am are detected.

Then, the coordinates of the detected calibration marks Am are connected to each other as a line segment, and the center position PC1 of the four calibration marks Am or the center positions PC2, PC3 of the pair of alignment marks Am in the width direction of the liquid crystal panel P are calculated. Based on these positions, the position of the pixel column of the center of the display area P4 is detected.

Further, depending on the set position of the display region P4 of the outer shape of the liquid crystal panel P, the center position PC1 or the center position PC2 obtained by the coordinates of the calibration mark Am may have a central position other than the display area P4. In this case, preferably based on the design value of the liquid crystal panel P, the deviation between the true center position and the calculated center position PC1 or the center positions PC2, PC3 is first set as a pre-cancellation amount for appropriately canceling the calculated value. .

(Detection of Center Position of Optical Module 1) As the reference position of the optical component 1, a first region located at the center in the width direction of the patterned phase difference layer 3 is used.

According to the review by the present inventors, if the optical component 1 is used as the center position as the liquid crystal panel P and the position calculated by the geometry is used, it is understood that the display quality may be degraded. This reason is as follows.

First, in the FPR type 3D liquid crystal display device, the first region or the second region of the patterned phase difference layer 3 and the pixel column of the liquid crystal panel must be bonded to each other in a one-to-one correspondence state. If the first region and the second region are overlapped with one pixel column, it is the cause of crosstalk.

On the other hand, in the optical module 1, the side in the longitudinal direction of the optical module 1 and the extending direction of the first region (or the second region) may not be parallel.

For example, the optical assembly 1 is mass-produced in the form of a roller-to-roller. More specifically, a layer of the photo-alignment material is formed on the surface of the strip-shaped film material, and the two kinds of polarized light which are alternately arranged in the direction of the conveyance direction are exposed to the optical alignment while the film material roll is conveyed. The layers of the material form two polarizing patterns (first region, second region) corresponding to the two types of polarized light as raw materials for the optical component. Then, this raw material was appropriately cut to fabricate an optical component.

However, in the manner in which the drum is applied to the drum, the film material is bent during the drum conveyance. Therefore, the first region or the second region formed by exposing the tortuous film material may be bent. In this case, the side in the longitudinal direction of the optical component 1 is not parallel to the extending direction of the first region (or the second region).

Further, depending on the accuracy of the cutting process applied by the shape of the liquid crystal panel P, the side in the longitudinal direction of the optical module 1 and the extending direction of the first region (or the second region) may not be parallel.

For these reasons, in the position calculated geometrically by the shape of the optical component 1, the first region and the second region of the patterned phase difference layer 3 do not necessarily overlap with the pixel columns in a one-to-one correspondence.

For the above reasons, in the case where the optical component 1 is attached to the liquid crystal panel P, it is necessary to detect the polarizing pattern of the patterned phase difference layer 3 in the center position of the optical component 1, and to apply the polarizing pattern to the liquid crystal panel P. The matrix corresponds to the technique of fitting.

The first region and the second region of the patterned phase difference layer 3 in the center position of the optical component 1 are different in optical characteristics of the first region and the second region, and the polarized light is penetrated while being photographed, and then the photographed image is used. The screen is optically detected.

However, since the optical module 1 has a polarizing layer, the light transmittance is low, the photographed image is easily darkened, and the birefringence of the protective film Pf attached to the surface of the optical component 1 is different from that in the plane, and the photographing screen is taken. The analysis becomes difficult.

Therefore, in the present embodiment, the boundary between the first region and the second region (detection process) is detected on one end side and the other end side in the width direction of the optical module 1, and then detected based on the one end side and the other end. At the boundary position, the first region (determining the process) located at the center in the width direction of the patterned phase difference layer 3 is determined. The following is explained in order.

(Detection Process) As shown in FIG. 5, the optical component 1 is photographed at both ends (indicated by symbols 13, 14) and the central portion of the optical module 1 in the longitudinal direction by using a plurality of imaging devices (not shown). One end 11 in the width direction, the other end 12, and the imaging areas PA1 - PA9 set in the center, respectively. Each of the imaging regions is an imaging region PA1-PA3 set by the end portion 13 of the optical module 1 in the longitudinal direction, and an imaging region PA4-PA6 set at the end portion 14 of the optical component 1 in the longitudinal direction, and the length of the optical component. The shooting area PA7-PA9 set in the center of the side direction is combined.

As shown in FIG. 6, in the end portion 13 of the optical module 1 in the longitudinal direction, the boundary Ba of the first region 3Ra and the second region 3La included in the imaging region PA1 is detected based on the image originally captured in the imaging region PA1. Based on the set position of the photographing area PA1 and the design of the optical component 1, it is known that the first region 3Ra is the first first region from one end 11 of the optical component 1, and the second region 3La is from one end 11 of the optical component 1. The second and second areas.

Then, based on the screen imaged in the imaging area PA2, the boundary Bb of the first area 3Rb and the second area 3Lb included in the imaging area PA2 is detected. Based on the set position of the photographing area PA2 and the design of the optical component 1, it is known that the first region 3Rb is the first first region from the other end 12 of the optical component 1, and the second region 3Lb is from the other end of the optical component 1. The second and second areas of the 12th.

For example, the boundary Ba is a picture that can be binarized, and is detected by smoothing the boundary portion of black and white. The same is true for the boundary Bb.

According to this, the boundaries Ba, Bb are detected, and then the subsequent position detection is performed based on the detected boundaries Ba, Bb, because the polarization pattern of the patterned phase difference layer 3 can be correctly detected regardless of the outer shape of the optical component 1. The location.

(Determining the Process: Determination of the First Region of the Center) Next, the center position in the width direction of the patterned phase difference layer 3 is calculated based on the positions of the boundaries Ba, Bb detected in the side of the one end 11 and the side of the other end 12. . In Figure 6, the calculated central position is indicated by the symbol Bx. The center position Bx is included in the imaging area PA3 set in the center of the width direction of the optical component 1.

Here, the "center of the width direction of the patterned phase difference layer 3" means the center of the width direction of the portion of the patterned phase difference layer 3 which overlaps with the plane of the display region P4 of the liquid crystal panel P. In the following description, a portion overlapping the plane of the display region P4 of the liquid crystal panel P in the patterned retardation layer 3 is referred to as an "effective region".

For example, in the optical module 1, the number of the first region and the second region disposed in the remaining region from the boundary Ba to the end portion on the one end 11 side of the effective region, and the other end disposed from the boundary Bb to the effective region When the number of the first area and the second area of the remaining area of the end portion on the 12 side is different, the number of the first area and the second area disposed in the remaining area is considered, and the center position Bx is calculated.

Next, based on the screen imaged in the imaging area PA3, the first region 3Rc disposed at the center position Bx is detected, and the first region 3Rc at the center of the effective region is determined.

In the captured picture, the first area and the second area can be distinguished because the difference in color or brightness of the first area and the second area can be seen. However, due to the birefringence of the protective film, in some areas, the second area is relatively brighter than the first area, while in other areas, the first area is visible. The brighter phenomenon in the second area occurs, so the accuracy may be degraded based on the detection of the shot screen.

However, as described above, the prediction of the center position of the effective area from the boundary Ba, Bb determines that the first area disposed at the predicted position is the first area in the center of the effective area, and is not misleading by the appearance of the captured picture. The first area in the center of the effective area can be determined.

(Determining Process: Detection of Center Line) Next, based on the screen imaged in the imaging area PA3, the center line in the width direction of the first region 3Rc is approximated by a plurality of coordinates. 7A, 7B, and 9 are explanatory views showing a method of obtaining a center line, and Fig. 8 is a flow chart showing a method of obtaining a center line. In the following description, the steps of the operation are disclosed while referring to the flowchart shown in FIG. 8 as appropriate.

First, as shown in FIG. 7A, the width of the first region is measured at a plurality of points based on the screen photographed in the photographing region PA3 (step S1). For example, the captured image is converted into a gray scale, and the distance W between the boundaries Bc and Bd in the width direction of the first region 3Rc is measured at the complex position.

Further, for convenience, in FIG. 7A, although the boundaries Bc and Bd are represented by straight lines, the boundaries Bc and Bd are not straight lines in the photographing screen. Therefore, the distances W measured at the complex positions are mutually different values. Further, since it is a screen, the boundaries Bc and Bd also have ambiguous positions, so the distance W cannot be measured at such a position.

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

When the measurement point that can be effectively measured is equal to or greater than the first threshold value, the coordinates of the point D (center position) of the width are calculated at the measurement point that can be effectively measured (step S3), and then the complex point D (center position) is used. The coordinates approximate the center line C1 of the width direction of the first region 3Rc (step S4). In the approximate case, a statistical method of usual knowledge can be used, for example, an approximation method of obtaining a regression line (approximate straight line) as the least square method is used. Further, as the setting of the first threshold value, the lower limit of the number of measurement points that can be effectively measured can be appropriately set based on the specifications of the patterned phase difference layer 3.

Fig. 7B is a view showing an approximate center line C1 as a map of Y = 0.

Here, in FIG. 7B, the point D1 drawn on the +y side or the point D2 drawn on the -y side is larger than the other points D, and the distance from the center line C1 is large, and the calculation result of the center line C1 is considered. There will be a big impact. In such a case, it is determined based on a preset threshold value (second threshold value) (step S5), and measurement data of measurement points (points D1 and D2) having a larger separation distance than the second threshold value are deleted, preferably. The center line is again approximated using points remaining except for point D1 and point D2. Then, the number of measurement points remaining after the measurement point largely deviated from the center line C1 is removed, compared with the first threshold value (step S2), and the subsequent processing is judged. Here, as the setting of the second threshold value, the upper limit of the interval position between the center positions can be appropriately set based on the specifications of the patterned phase difference layer 3 as in the case of the first threshold value described above.

On the other hand, in the case where there is no measurement point having a large separation distance from the center line C1, the distance from the point D (center position) of the center line C1 is based on a preset threshold (third threshold). The deviation of the point D (center position) is evaluated (step S6). The third threshold is a value that is less than the second threshold. In Figure 7B, the third threshold is indicated by the symbol M. When the deviation of the point D (center position) is within the range defined by the threshold value, the determined center line C1 is determined as the center line of the first region 3Rc. Further, as the setting of the third threshold value, the upper limit of the interval position between the center positions is also the same as the case of the first threshold value and the second threshold value, and can be appropriately determined based on the specifications of the patterned phase difference layer 3. set up.

In the case of the determination in the step S2, the measurement point that can be effectively measured is lower than the threshold value, and in the case of the determination in the step S6, the distance from the center line C1 has a point D (center position) larger than the third threshold value. Each of the imaging regions at different positions along the extending direction of the first region 3Rc is changed and photographed (step S8), and the width is measured again at the plurality of positions based on the obtained screen (step S1).

The imaging areas PA1 - PA3 of the end portion 13 set in the longitudinal direction of the optical unit 1 and the imaging areas PA4 - PA6 of the end portion 14 set in the longitudinal direction of the optical unit 1 are set in the longitudinal direction of the optical unit 1 The central shooting area PA7-PA9 is processed as described above.

Further, when the imaging area is changed, as shown in FIG. 9, the optical unit 1 is divided into three areas AR1, AR2, and AR3 in the longitudinal direction, and then the imaging area is preferably changed so as not to protrude from the respective areas. At this time, it is preferable that the imaging areas PA3 and PA6 at both ends in the longitudinal direction change the imaging area toward the center side of the optical unit 1, such as the imaging areas PA31 and PA61, respectively. In the case where the imaging area PA9 in the center in the longitudinal direction is changed to the imaging area PA91 and is changed again, if the imaging area PA92 is changed, it is preferable to set the imaging area PA9 as the center in the longitudinal direction. Change the shooting area on both sides.

Further, when the shooting area is changed, the shooting areas before and after the change may not overlap, such as the shooting area PA3, the shooting area PA31, the shooting area PA6, and the shooting area PA61; the shooting areas before and after the change may partially overlap. Such as shooting area PA9 and shooting area PA91, PA92.

(Finishing Process) Next, as shown in FIG. 10, the liquid crystal panel P and the optical component 1 are bonded together. At this time, the two are bonded together based on the relative positions of the pixel rows located at the center in the width direction of the liquid crystal panel P and the center line of the determined first region 3Rc (see FIG. 7A). In FIG. 10, the xyz coordinate system is set such that the longitudinal direction of the liquid crystal panel P is the x direction, the width direction of the liquid crystal panel P is the y direction, and the direction perpendicular to the xy plane is displayed as the z direction.

Specifically, as shown in FIG. 11A, the bonding surface of the optical unit 1 and the liquid crystal panel is controlled based on the center line C1, C2 of the end portion in the longitudinal direction of the optical module 1 and the center line C3 at the center portion in the longitudinal direction. The relative orientation θ within, and adjust the position of the optical component 1. At this time, the angle-adjusted rotation axis is an axis in the same direction as the z-axis, and for example, the rotation center is a position overlapping the center line C3. Further, the center line of the end portion in the longitudinal direction for the angle adjustment is preferably one of the center lines C1 and C2.

Further, as shown in FIG. 11B, the relative position of the optical unit 1 and the liquid crystal panel in the width direction is controlled based on the center line C3 of the center portion in the longitudinal direction, and the position of the optical unit 1 is adjusted. In Fig. 11B, the optical assembly 1 is shown moving in the y direction.

The user of the display device can easily find out if the crosstalk occurs in the center of the display area because the center of the display area is closely observed. On the other hand, in the present embodiment, the position of the optical unit 1 is adjusted with the center line C3 of the optical unit 1 as a reference, and the relative position of the pixel column and the center line C3 located at the center in the width direction of the liquid crystal panel P is attached. When both are combined, the optical component 1 and the liquid crystal panel are attached to each other at the center of the display area. Therefore, in the display device manufactured by the manufacturing method of the present embodiment, crosstalk is less likely to occur at the center of the display area, and high-quality screen display becomes possible.

In other words, according to the method of manufacturing an optical display device having the above configuration, the optical unit and the liquid crystal panel can be bonded with high positional accuracy, and high-quality screen display becomes possible.

In the present embodiment, the polarizing pattern that penetrates the right-eye screen is the first region 3R. However, the polarizing pattern that is penetrated by the left-eye screen may be set as the first region, and position detection or the like may be performed. Further, in the present embodiment, although the manufacturing apparatus for manufacturing the display device 100 (optical display device) is not shown in the drawings, the manufacturing device is not limited in any way. For example, in the manufacturing apparatus of the display device 100, an assembly transport unit for assembling each of the components while the components are being transported on the process may be employed, or an operation having the assembly transport unit may be employed. The configuration of the calculation control unit and the like of the actuation control shown in the flowchart of FIG.

Although the preferred embodiments of the present invention have been described above with reference to the attached drawings, the present invention is not limited to the examples. The various shapes or combinations of the constituent elements shown in the above examples are merely examples, and various changes based on design requirements and the like are possible without departing from the gist of the invention.

1‧‧‧Optical components
2‧‧‧ polarizing layer
3‧‧‧ patterned phase difference layer
3R‧‧‧ first area
3Ra‧‧‧First Area
3Rb‧‧‧ first area
3Rc‧‧‧ first area
3L‧‧‧Second area
3La‧‧‧Second area
3Lb‧‧‧Second area
11‧‧‧End
12‧‧‧The other end
13‧‧‧End
14‧‧‧ End
100‧‧‧ display device
Am‧‧‧ calibration mark
AR1‧‧‧ area
AR2‧‧‧ area
AR3‧‧‧ area
Ba‧‧‧ border
Bb‧‧‧ border
Bc‧‧‧ border
Bd‧‧‧ border
Bx‧‧‧Central location
C1‧‧‧ center line
C2‧‧‧ center line
C3‧‧‧ center line
D‧‧‧ points
D1‧‧ points
D2‧‧ points
F11‧‧‧ polarizing film
K‧‧‧ boundary line
L‧‧‧画素
P‧‧‧ LCD panel
P1‧‧‧ first substrate
P2‧‧‧second substrate
P3‧‧‧ liquid crystal layer
P4‧‧‧ display area
PA‧‧‧ shooting area
PA1-PA9‧‧‧ shooting area
PA31‧‧‧Photographing area
PA61‧‧‧Photographing area
PA91‧‧‧Photographing area
PA92‧‧‧Photographing area
PC1‧‧‧ central location
PC2‧‧‧ central location
PC3‧‧‧ central location
Pf‧‧‧protective film
S1-S8‧‧‧ steps
W‧‧‧distance from θ‧‧‧

Fig. 1 is a plan view showing a schematic configuration of a display device. FIG. 2 is a cross-sectional view showing a schematic configuration of a display device. [Fig. 3] is a plan view schematically showing a patterned phase difference layer. Fig. 4 is an explanatory view showing a method of manufacturing the optical display device of the embodiment. Fig. 5 is an explanatory view showing a method of manufacturing the optical display device of the embodiment. Fig. 6 is an explanatory view showing a method of manufacturing the optical display device of the embodiment. Fig. 7A is an explanatory view showing a method of manufacturing the optical display device of the embodiment. Fig. 7B is an explanatory view showing a method of manufacturing the optical display device of the embodiment. Fig. 8 is an explanatory view showing a method of manufacturing the optical display device of the embodiment. Fig. 9 is an explanatory view showing a method of manufacturing the optical display device of the embodiment. Fig. 10 is an explanatory view showing a method of manufacturing the optical display device of the embodiment. Fig. 11A is an explanatory view showing a method of manufacturing the optical display device of the embodiment. Fig. 11B is an explanatory view showing a method of manufacturing the optical display device of the embodiment. FIG. 12 is a plan view for explaining a bonding position of a liquid crystal panel and a patterned retardation layer in a 3D liquid crystal display device. FIG.

1‧‧‧Optical components

3Ra‧‧‧First Area

3Rb‧‧‧ first area

3Rc‧‧‧ first area

3La‧‧‧Second area

3Lb‧‧‧Second area

11‧‧‧End

12‧‧‧The other end

13‧‧‧End

Ba‧‧‧ border

Bb‧‧‧ border

Bx‧‧‧Central location

PA1‧‧‧ shooting area

PA2‧‧‧ shooting area

PA3‧‧‧ shooting area

Claims (9)

A manufacturing method of an optical display device is a manufacturing method of bonding an optical component to an optical display component having a plurality of pixel columns, wherein the optical component includes a phase difference layer, and the phase difference layer has a change of incident linear polarization into a first polarization. a plurality of first regions of the state and a second region that changes to a second polarization state, and the plurality of first regions and the plurality of second regions extend in a strip shape to form a phase difference layer in a plan view; the first region of the phase difference layer and The second region is alternately arranged in a crossing direction of the extending direction of the first region and the second region; wherein the manufacturing method has: a detecting process, and one end side and the other end side of the intersecting direction are respectively detected for calculation a reference position at a central position in the intersecting direction of the overlapping portion of the display region plane of the optical display member; and a determination process for calculating the central position based on the reference positions detected on the one end side and the other end side, Determining a first area disposed at the central location; and a bonding process based on the determined first area and located in the optical display The relative position of the center of the cross direction of the element row of pixels, the bonding of the optical element and the optical display means. The method of manufacturing an optical display device according to claim 1, wherein the determined first region is captured by the determining process, and the width of the determined first region is measured at a plurality of positions based on the obtained screen, and the measured a coordinate at a center position of the width, wherein a plurality of coordinates approximate a center line of a width direction of the first region determined in the screen; and a bonding process based on the center line and a relative position of the pixel column at the center of the intersecting direction The optical component and the optical display component are attached. The method of manufacturing an optical display device according to claim 2, wherein in the determining process, when the number of the measurement positions of the width can be determined to be smaller than the first threshold value, the photographing is different along the extending direction of the first region. The position is measured again at the complex position based on the obtained picture. The method of manufacturing an optical display device according to claim 2 or 3, wherein in the determining process, the measurement of the width is measured, and the distance from the center position of the center line is larger than the second threshold The position is excluded from the complex coordinates approximated by the center line, and the center line is again approximated. The manufacturing method of the optical display device according to claim 2 or 3, wherein in the case where the distance between the center positions of the center line and the center of the center line is larger than the third threshold value, the extending direction of the first area is taken The different positions are measured again at the complex position based on the obtained picture. The method for manufacturing an optical display device according to claim 1 or 2, wherein at least one end portion and a central portion of the extending direction of the phase difference layer are subjected to a detection process and a process for determining; and the bonding process is configured to be configured The first region of the central position calculated in each of the end portion and the central portion corresponds to a pixel column located at the center in the intersecting direction of the optical display member, and then bonded. The method of manufacturing an optical display device according to claim 6, wherein the optical component is bonded to the optical component based on a center line of the central portion and a relative position of a pixel column located at a central portion of the center in the intersecting direction And the optical display member. The method of manufacturing an optical display device according to claim 7, wherein the optical component and the optical display component are controlled based on a center line of at least one end portion of the extending direction and a center line of the central portion in the bonding process The relative orientation within the fit surface is then applied. The method of manufacturing an optical display device according to claim 7 or 8, wherein the bonding process controls the optical based on a center line of the central portion and a relative position of a pixel column located at a central portion of the center in the intersecting direction The relative position of the component and the width direction of the optical display member.