KR101927483B1 - Apparatus for inspecting alignment of stereoscopic image display - Google Patents

Abstract

The present invention relates to an alignment inspection apparatus for a three-dimensional image display apparatus for inspecting an alignment state between a cohesive display panel and a pattern reliader film, the apparatus comprising: an imaging element; The present invention also provides an apparatus for inspecting an alignment of a stereoscopic image display device including a vision camera for inspecting an alignment with a multi-angle inspection filter provided to the imaging element.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for inspecting an image of a stereoscopic image display apparatus,

The present invention relates to an alignment inspection apparatus for a stereoscopic image display apparatus.

The stereoscopic image display device is divided into a stereoscopic technique and an autostereoscopic technique. The binocular parallax method uses the parallax images of the left and right eyes with large stereoscopic effects. In the binocular parallax system, there are a glasses system and a non-glasses system, and both systems are now practically used.

The spectacle method realizes a stereoscopic image by using polarizing glasses or liquid crystal shutter glasses to display the right and left parallax images in a direct view type display device or a projector by changing the polarization directions of the parallax images in a time division manner. In the non-eyeglass system, an optical plate such as a parallax barrier for separating the optical axis of the left and right parallax images is generally implemented in a manner of being installed in front of or behind the display screen.

Some of the stereoscopic image display devices use a patterned retarder in the form of a film having a different polarization state for each line. The patterned retarder film is attached to the display panel. The surface of the pattern relief film attached to the display panel is protected by a protective film.

On the other hand, the patterned retarder film is attached to the display panel, and then the process of inspecting the attachment state proceeds. However, it is difficult to confirm the retarder pattern included in the patterned retarder film due to the irregular orientation angle of the protective film adhered to the surface of the patterned retarder film.

In order to solve the problems of the background art described above, the present invention has been made to solve the above-mentioned problems of the prior art by correcting the influence of the irregular orientation angle of the protective film attached to the pattern reliaded film, The present invention provides an alignment inspection apparatus for a stereoscopic image display apparatus which can clearly determine a state of a three-dimensional image display apparatus.

According to an aspect of the present invention, there is provided an apparatus for inspecting an alignment of a three-dimensional image display device for inspecting an alignment state between a cohesive display panel and a pattern reliader film, There is provided an apparatus for inspecting an alignment of a stereoscopic image display apparatus including a vision camera for an alignment inspection having a multi-angle inspection filter that divides an image of a film into multiple angles and provides the film to an imaging element.

The multi-angle inspection filter may include a 1/4 wavelength plate and a polarizing plate.

The multi-angle inspection filter may include N multiple-valued patterns (N is an integer of 2 or more) selected from the range of 0 to 360 degrees.

The N polygonal patterns can be selected from one or more of the same or different angles.

The N polygonal patterns may be arranged in pairs of polygonal patterns selected at the same angle.

N number of polygonal patterns can be formed in a quarter wave plate or a polarizing plate.

The N polygonal patterns may be rectangular or square.

The multi-angle inspection filter may be located adjacent to the imaging element.

The vision camera for the alignment inspection can be arranged to image two images of the center of the attached display panel and the patterned retarder film.

The present invention relates to a pattern reliader film which can obtain a correct image by canceling the influence of irregular orientation angles of a protective film attached to the pattern reliader film and can reliably determine the alignment state between the display panel and the pattern reliader film based on the correct image. There is an effect of providing an alignment inspection apparatus for a video display device.

1 is a schematic view of a stereoscopic image display apparatus.
Fig. 2 is a side view schematically showing the display panel and the patterned retarder film shown in Fig. 1; Fig.
3 is a sectional view of the display panel and the patterned relief film shown in Fig.
4 is a view showing an alignment mark for aligning between a display panel and a pattern reliader film;
5 is a first example of an alignment key.
6 is a second example of an alignment key.
7 to 10 are views for explaining a method of manufacturing a stereoscopic image display device according to the present invention.
11 to 13 are diagrams for explaining the alignment state inspection.
14 is a configuration diagram of a vision camera for an alignment inspection according to a comparative example;
15 is a configuration diagram of a vision camera for inspection of an alignment according to the present invention.
Fig. 16 is a configuration diagram of the multi-angle inspection filter included in Fig. 15; Fig.
17 to 19 are various examples of patterns formed in the filter for polygonal inspection.
20 is a view showing an image obtained by using the filter for multi-angle inspection of Fig. 19; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of a stereoscopic image display device, and FIG. 2 is a schematic side view of a display panel and a pattern reliader film shown in FIG.

As shown in FIGS. 1 and 2, a stereoscopic image display device includes an image supply unit SBD, a timing control unit TCN, a driving unit DRV, a display panel LCD, a patterned retarder film FPR, (GLS).

The image supply unit (SBD) generates 2D image frame data in a two-dimensional mode (2D mode) and 3D image frame data in a three-dimensional mode (3D mode). The image supply unit SBD supplies the timing control unit TCN with timing signals and video frame data such as a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a data enable signal DE and a main clock do. The image supply unit SBD is selected in the 2D or 3D mode according to the user's selection input through the user interface, generates image frame data corresponding thereto, and supplies the image frame data to the timing control unit TCN. The user interface includes user input means such as an OSD (On Screen Display), a remote controller, a keyboard, and a mouse.

The timing control unit TCN receives 3D image frame data including left eye image frame data and right eye image frame data from the image supply unit SBD. The timing controller TCN alternately supplies the left eye image frame data and the right eye image frame data to the driver DRV at a frame frequency of 120 Hz or more. In addition, the timing control unit TCN supplies a control signal corresponding to the image frame data to the driving unit DRV.

The driving unit DRV includes a data driver connected to the data lines and supplying a data signal, and a scan driver connected to the scan lines to supply a scan signal. The driving unit DRV converts the digital left-eye and right-eye image frame data into analog left-eye and right-eye image frame data under the control of the timing control unit TCN and supplies them to the data lines. In addition, the driving unit DRV sequentially supplies the scan signals to the scan lines under the control of the timing control unit TCN.

The display panel (LCD) receives a scan signal and a data signal from the driver DRV and displays a 2D image or a 3D image corresponding thereto. The display panel (LCD) may be composed of an organic light emitting element, an electrophoretic element, a plasma light emitting element, and a liquid crystal element, but is not limited thereto. The elements listed above are formed between the lower substrate and the upper substrate, and have different configurations of the lower substrate and the upper substrate depending on the characteristics of the devices. Therefore, in the present invention, for convenience of explanation, a liquid crystal display panel composed of a liquid crystal element is an example. A lower polarizing plate (LPOL) is attached to a lower part of a display panel (LCD) composed of a liquid crystal display panel, and an upper polarizing plate (UPOL) is attached to an upper part. A display panel (LCD) composed of a liquid crystal display panel displays a 2D image in the 2D mode and a 3D image in the 3D mode by the light provided from the backlight unit.

The patterned retarder film (FPR) is attached to the color filter substrate (display surface) of the display panel (LCD). The patterned retarder film (FPR) displays the left eye image and the right eye image displayed on the display panel (LCD) in a line-by-line manner and interlaced. To this end, the patterned retarder film (FPR) includes an adhesive layer 147, and a retarder layer 145 and a protective film 140. The retarder layer 145 includes a first retarder pattern layer 145R and a second retarder pattern layer 145L. The first and second retarder pattern layers 145R and 145L may cause the right circularly polarized light R and the left circularly polarized light L, respectively, but are not limited thereto. The first and second retarder pattern layers 145R and 145L are divided into scan lines of the subpixels SP of the display panel LCD. The patterned retarder film FPR is formed by using the first and second retarder pattern layers 145R and 145L so that odd lines are divided into right circularly polarized light R and even lines are divided into left circularly polarized light L And separates the image displayed on the display panel (LCD) into a left eye image and a right eye image.

Polarized glasses (GLS) transmit the left eye image and the right eye image, which are emitted through the patterned retarder film (FPR), separately. To this end, the left eyeglass (LEFT) of the polarizing glasses (GLS) includes a polarizing film that transmits the left eye image, and the right eyeglasses (RIGHT) of the polarizing glasses (GLS) includes a polarizing film that transmits the right eye image.

Hereinafter, the display panel and the pattern reliader film will be described in more detail.

FIG. 3 is a cross-sectional view of the display panel and the pattern reliader film shown in FIG. 1, and FIG. 4 is a view showing an alignment mark for aligning the display panel and the pattern reliader film.

The display panel (LCD) includes a transistor array substrate 110, a lower polarizer (LPOL) liquid crystal layer 115, a color filter layer 125, a color filter substrate 120, and an upper polarizer UPOL. Sub-pixels SP11 to SP31 defined by data lines, scan lines, thin film transistors, and storage capacitors (not shown) are formed in the transistor array substrate 110. [ A color filter layer 125 is formed on one surface (inner surface) of the color filter substrate 120 to convert light emitted from the sub-pixels SP11 to SP31 into red, green, and blue (RGB). A black matrix 121 is formed on one surface of the color filter substrate 120. The black stripe 130 may be formed on the other surface of the color filter substrate 120 or may be omitted.

The pattern relief film (FPR) includes an adhesive layer 147, a retarder layer 145, and a protective film 140. The adhesive layer 147 is a layer for adhesion between the display panel (LCD) and the color filter substrate 120. The retarder layer 145 is divided into a first retarder pattern layer 145R causing the right circularly polarized light R and a second retarder pattern layer 145L generating the left circularly polarized light L by the polarized light separator BL .

As shown in FIG. 4, an alignment mark AK is formed on the other surface of the color filter substrate 120 of the display panel (LCD). On the other surface of the color filter substrate 120, an upper polarizer is attached as described above. An antistatic layer is formed on the other surface of the color filter substrate 120 according to the structure. Accordingly, the other surface of the color filter substrate 120 on which the alignment mark AK is formed includes the surface immediately above the other surface of the color filter substrate 120, the surface immediately above the upper polarizer, or the surface immediately above the antistatic layer. As described above, the alignment marks AK can be formed in various positions according to the structure of the color filter substrate 120. In the following description, the alignment marks AK are positioned directly on the other side of the color filter substrate 120 for convenience.

The alignment mark AK is formed in the non-display area except for the display area AA of the color filter substrate 120. [ The Alliance (AK) includes a central Alliance (AKC), an Upper Alliance (AKU), and a lower Alliance (AKL). The central alignment mark AKC is formed at the center of the other surface of the color filter substrate 120 and the upper alignment mark AKU and the lower alignment mark AKL are formed on the color filter substrate 120 on the basis of the central alignment mark AKC. And are formed at the top and bottom of the surface. However, the Alignment Key (AK) may be formed only by the Central Alignment Key (AKC) according to the shape. The central alignment key (AKC) is used to check the alignment between the display panel (LCD) and the patterned retarder film (FPR). The position "LCD_C" at which the central alignment mark AKC is formed corresponds to the position "FPR_C" at the center of the patterned retarder film FPR.

The display panel (LCD) and the patterned retarder film (FPR) described above are attached through an attaching process. The alignment mark (AK) is used to align the display panel (LCD) to the alignment stage and to check the alignment between the display panel (LCD) and the pattern relief film (FPR). The alignment mark (AK) is formed in the following shape.

The following describes the alignment key.

5 is a first exemplary view of an alignment key, and Fig. 6 is a second exemplary view of an alignment key.

As shown in Fig. 5, the alignment key AK is formed into a single bar shape (rectangular bar shape). The alignment mark AK is formed corresponding to the position "LCD_C" at the center of the display panel. The alignment mark AK is set to a range that can be identified by the inspection apparatus in which the length L1 in the lateral direction and the width W1 in the longitudinal direction are aligned. Referring to FIG. 4, it is preferable that the polarized light separating portion BL positioned at the center of the patterned retarder film FPR is aligned so as to pass through "LCD_C" which is the center of the alignment key AK.

As shown in Fig. 6, the alignment mark AK is formed into two bar shapes (rectangular bar shapes). The first alignment key AK1 and the second alignment key AK2 are formed at positions separated by "W1 ". The center of "W1" corresponds to the position "LCD_C" at the center of the display panel. The first and second alignment keys AK1 and AK2 are set in a range that can be identified by the inspection apparatus in which the length L1 in the lateral direction and the width W2 in the longitudinal direction are aligned. "W1 "," W2 ", and "W3" Referring to FIG. 4, it is preferable that the polarized light separating portion BL positioned at the center of the patterned retarder film FPR is aligned so as to pass through "LCD_C" which is the center of the alignment key AK.

Hereinafter, an apparatus for manufacturing a stereoscopic image display apparatus and a method for manufacturing a stereoscopic image display apparatus using the same will be described.

FIGS. 7 to 10 are views for explaining a method of manufacturing a stereoscopic image display apparatus, and FIGS. 11 to 13 are views for explaining an alignment state inspection.

One of an organic light emitting element, an electrophoretic element, a plasma light emitting element, and a liquid crystal element can be used as a display panel used in a method of manufacturing a stereoscopic image display apparatus, but for convenience of explanation, a liquid crystal display panel composed of a liquid crystal element is an example . Reference is now made to Figs. 1 to 6 together with the description to facilitate understanding of the description.

First, the transistor substrate 110 and the color filter substrate 120 are bonded together to form a display panel (LCD). At this time, the display panel (LCD) is an example of a liquid crystal display panel composed of a liquid crystal element.

Next, a pattern relief film (FPR) to be attached to the display panel (LCD) is formed.

Next, an alignment mark AK is formed in the non-display area of the color filter substrate 120 of the display panel (LCD). At this time, the alignment mark AK may be formed before the transistor substrate 110 and the color filter substrate 120 are bonded together or before forming the patterned retarder film (FPR).

Next, attach the display panel (LCD) and the patterned retarder film (FPR). The display panel (LCD) and pattern relief film (FPR) can be attached by various process methods. In the present invention, as shown in FIG. 7 to FIG. 10, an example using a system composed of alignment stages ST1 and ST2, vision cameras VR1 to VR5, VP1 to VP4, a drum DR and a controller CTRL is used.

The first aligning stage ST1 is configured to suck the patterned retarder film FPR and to fine line the x-axis, y-axis, and? -Axis directions under the control of a controller CTRL interlocked with the first vision cameras VR1- Thereby correcting the error with respect to the position of the pattern relief film (FPR) (FIG. 7). At this time, the first vision cameras VR1 to VR5 pick up a dummy pattern (a dummy pattern for alignment) formed on the edge of the pattern relief film FPR fixed on the first alignment stage ST1, To the controller (CTRL). The first vision cameras VR1 to VR5 may be arranged to pick up images of the upper two positions, the lower two positions and the central position of the patterned retarder film FPR, but are not limited thereto. By this process, the upper, middle and lower ends of the patterned retarder film (FPR) coincide with virtual reference lines set in the controller (CTRL).

Next, when the virtual reference line set in the center of the patterned retarder film (FPR) matches the virtual reference line set in the controller (CTRL), the drum (DR) rotates counterclockwise and sucks the patterned retarder film (FPR) 8). At this time, the protective film of the patterned retarder film (FPR) is removed and the adhesive layer 147 is exposed.

Next, the second alignment stage ST2 performs fine adjustment in the x-axis, y-axis, and the? -Axis direction under the control of the controller CTRL that adsorbs the display panel LCD and interlocks with the second vision cameras VP1- Thereby correcting the error with respect to the position of the display panel (LCD) (FIG. 9). At this time, the second vision cameras VP1 to VP4 pick up the alignment mark AK formed on the edge of the display panel (LCD) fixed on the second alignment stage ST2 and transmit the obtained image to the controller CTRL send. The second vision cameras VP1 to VP4 may be arranged to pick up images of the upper two places and the lower two places of the display panel (LCD), but are not limited thereto. By this process, the upper and lower ends of the display panel LCD are matched with virtual reference lines set in the controller CTRL.

Next, the drum DR is moved to the second aligning stage ST2 in a state of adsorbing the patterned retarder film FPR, and rotated in the counterclockwise direction to display the patterned retarder film FPR And attached to the color filter substrate 120 of the panel (LCD) (Fig. 10).

Next, the alignment state between the display panel (LCD) and the pattern relief film (FPR) is checked using the alignment mark AK (Figs. 11 and 12). In the process of checking the alignment state, the second vision cameras VP1 to VP4 can be used. However, in the embodiment, an alignment state inspection for a patterned retarder film (FPR) and a display panel (LCD) using an attached alignment vision vision camera (V1, V2) is used as an example.

Vision cameras V1 and V2 for aligning inspection are arranged to pick up images of two locations (L1 and L2) at the center (C) of the patterned display panel (LCD) and the patterned retarder film (FPR). A central alignment mark (AKC) formed on the color filter substrate 120 of the display panel (LCD) exists at two locations (L1 and L2) at the center (C) of the patterned retarder film (FPR) and the display panel . Here, two portions L1 and L2 at the center (C) of the pattern relief film FPR and the display panel (LCD) correspond to left and right non-display regions of the display panel (LCD).

The following results are obtained when two positions (L1 and L2) of the patterned retarder film (FPR) and the center (C) of the display panel (LCD) are photographed using the vision cameras V1 and V2 for alignment inspection . Here, "QWP" means a quarter wave plate attached to the third vision cameras V1 and V2.

13 (a) shows a state in which the protective film is not attached to the pattern reliader film FPR. When the protective film is not attached to the patterned retarder film FPR, the vision cameras V1 and V2 for aligning inspection are arranged such that the first retarder pattern layer formed on the patterned retarder film FPR and the second retarder pattern It is possible to obtain an image (right image of QWP) that can clearly distinguish the layer.

13 (b) shows a state in which the protective film 140 is attached to the pattern relief film FPR. When the protective film 140 is attached to the patterned retarder film FPR, the vision cameras V1 and V2 for aligning inspection are arranged in such a manner that the first retarder pattern layer formed on the patterned retarder film FPR, It is difficult to obtain an image (right image of QWP) that can clearly distinguish the retarder pattern layer. The reason is that the protective film 140 is irregularly oriented.

In order to solve the above problems, the present invention constitutes the vision cameras (V1, V2) for alignment inspection in the following manner. To facilitate understanding of the description, reference is also made to Figures 1 to 13 together.

FIG. 14 is a configuration diagram of a vision camera for inspection of an alignment according to a comparative example, FIG. 15 is a configuration diagram of a vision camera for inspection of an alignment according to the present invention, FIG. 16 is a view Figs. 17 to 19 are various examples of patterns formed on the polygonal inspection filter, and Fig. 20 is a view showing an image obtained by using the polygonal inspection filter of Fig. 19. Fig.

14, the camera body 151, the imaging device 152, the inspection filter 153, and the lens units 154, 155, 155 are attached to the alignment cameras V1, V2 for alignment inspection according to the comparative example. 156, and 157, respectively.

The imaging element 152 is formed on the camera body 151. The image pickup element 152 can be selected by a CCD (Charge Coupled Device) capable of obtaining an image. The inspection filter 153 is attached onto the imaging element 152. The inspection filter 153 is selected as a 1/4 wavelength plate.

The lens units 154, 155, 156, and 157 are attached to the camera body 151. The lens sections 154, 155, 156 and 157 include a coupling aperture 154, a ring illumination 155, a dummy protection film 156, and a glass substrate 157. The coupling member 154 is a mechanism for coupling the ring illumination 155, the protective film 156, and the glass substrate 157 to the camera body 151. The ring illumination 155 is an illumination device that provides illumination at the time of imaging. The dummy protective film 156 is a film that compensates for the irregular orientation angle of the protective film 140 formed on the patterned retarder film (FPR).

Vision cameras V1 and V2 for aligning inspection according to the comparative example use the same dummy protective film as the protective film 140 to compensate for the irregular orientation angle of the protective film 140 formed on the patterned retarder film FPR 155, 156, 157 in which the lenses 156, 156 are interposed. However, this structure compensates the irregular orientation angle of the protective film 140 formed on the patterned retarder film FPR and prevents the dummy protective film 156 in the clockwise direction R (or counterclockwise direction) .

Vision cameras V1 and V2 for aligning inspection according to the comparative example rotate or rotate the lens units 154, 155, 156 and 157 to rotate the dummy protective film 156, V2). Therefore, the vision cameras V1 and V2 for alignment inspection according to the comparative example rotate the dummy protective film 156 to continuously display the images of the patterned display panel LCD and the patterned retarder film FPR, And an optimum image is selected from the captured images to check the degree of alignment.

15, the vision cameras V1 and V2 for aligning inspection according to the present invention include a camera body 151, an imaging device 152, a multifocal inspection filter 160, and lens units 154 and 155 , 157).

The imaging element 152 is formed on the camera body 151. The image pickup element 152 can be selected by a CCD (Charge Coupled Device) capable of obtaining an image. The multi-angle inspection filter 160 is attached adjacent to the imaging element 152. [ The multi-angle inspection filter 160 may be directly attached to the imaging element 152 or attached to the glass substrate 157.

The lens units 154, 155, and 157 are attached to the camera body 151. The lens sections 154, 155, and 157 include a coupling aperture 154, a ring illumination 155, and a glass substrate 157. The coupling member 154 is a mechanism for coupling the ring illumination 155 and the glass substrate 157 to the camera body 151. The ring illumination 155 is an illumination device that provides illumination at the time of imaging.

On the other hand, as shown in FIG. 16, the multi-angle inspection filter 160 includes a 1/4 wave plate 161 and a polarizer 165. As shown in FIGS. 17 to 20, a polygonal pattern PT is formed on the multi-angle inspection filter 160. The polygonal pattern PT may be formed on the 1/4 wave plate 161 or the polarizing plate 165. However, it is preferable that the polygonal pattern PT is formed on the polarizing plate 165.

17, the first pattern PT1 having the first angle, the second pattern PT2 having the second angle, and the third pattern PT3 having the third angle are formed into two groups . The first to third angles are selected in the range of 0 to 360 degrees. At this time, the first to third angles are all selected at different angles, such as 90 degrees, 45 degrees and 0 degrees.

As shown in Fig. 18, the polygonal pattern PT includes a first pattern PT1 having a first angle, a second pattern PT2 having a second angle, a third pattern PT3 having a third angle, , A fifth pattern (PT5) having a fifth angle, and a sixth pattern (PT6) having a sixth angle. The first to sixth angles are selected from the range of 0 to 360 degrees. At this time, the first to sixth angles are all selected at different angles such as 0 degrees, 15 degrees, 30 degrees, 45 degrees, 70 degrees and 90 degrees.

As shown in Fig. 19, the polygonal pattern PT is formed of a first pattern PT1 having a first angle, a second pattern PT2 having a second angle, and a third pattern PT3 having a third angle. The first to third angles are selected in the range of 0 to 360 degrees. At this time, the first to third angles are all selected at different angles, such as 90 degrees, 45 degrees and 0 degrees.

The Vision cameras V1 and V2 for aligning inspection according to the present invention may be configured to have a similar or identical orientation angle to the protective film 140 to compensate for the irregular orientation angle of the protective film 140 formed on the patterned retarder film FPR The multi-angle inspection filter 160 is used. The multi-angle inspection filter 160 may be attached directly to the imaging element 160 or to the glass substrate 157.

This structure compensates for the irregular orientation angles of the protective film 140 formed on the patterned retarder film FPR and has a polygonal pattern PT oriented to obtain an image, . For example, in the comparative example, the dummy protective film 156 or the camera must be rotated while shooting. On the other hand, since the present invention uses the multi-angle inspection filter 160 having a pattern composed of a plurality of angles, a separate device for rotating as in the comparative example is not required.

Therefore, when the vision cameras V1 and V2 for aligning inspection according to the present invention are used, the first retarder pattern layer 145R aligned on the alignment mark AK and the second retarder pattern layer 145R aligned on the alignment mark AK, It becomes possible to obtain an image PT2_IMG that can clearly distinguish the retarder pattern layer 145L. Here, PT1_IMG and PT3_IMG mean images obtained unclearly by the angular error between the irregular orientation angle of the protective film 140 formed on the patterned retarder film (FPR) and the polygonal pattern (PT).

17 to 19 show an example in which the polygonal pattern PT has a rectangular shape. However, the shape of the polygonal pattern PT may be variously formed in a square shape or a circular shape. For example, when the shape of the polygonal pattern PT is a square or a circle, three patterns are located at the top and three patterns are located at the bottom.

Meanwhile, the multi-angle inspection filter 160 included in the alignment cameras V1 and V2 for alignment inspection can be applied to the vision cameras VR1 to VR5 and VP1 to VP4 shown in FIGS. 7 to 10 have. In this case, it is possible to minimize the influence of the protective film adhered to the pattern reliader film throughout the entire time until it is attached to the display panel after being aligned on the drum, and the alignment can be performed.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a pattern relief film capable of clearly detecting the alignment state between the display panel and the pattern reliader film based on the correct image obtained by canceling the influence of the irregular orientation angle of the protective film attached to the pattern relief film There is an effect of providing an alignment inspection apparatus for a stereoscopic image display apparatus.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be practiced. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. In addition, the scope of the present invention is indicated by the following claims rather than the detailed description. Also, all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

V1, V2: Vision camera for alignment inspection LCD: Display panel
FPR: pattern-retarder film 151: camera body
152: Imaging element 160: Filter for multi-angle inspection
161: 1/4 wavelength plate 165: polarizer plate
154: Coupling port 155: Ring light
157: glass substrate

Claims (9)

An apparatus for inspecting an alignment of a stereoscopic image display apparatus for inspecting an alignment state between a cohesive display panel and a pattern reliader film,
An imaging element,
And a vision camera for an alignment inspection having a polygonal inspection filter for dividing an image of the display panel and the pattern reliader film into multiple angles and providing the image to the imaging element,
The multi-angle inspection filter
A 1/4 wavelength plate and a polarizing plate,
And a polygonal pattern formed on the 1/4 wave plate or the polarizing plate and patterned at one or more of the same or different angles. delete The method according to claim 1,
The polygonal pattern
(N is an integer of 2 or more) selected from one or more of the same or different angles in the range of 0 to 360 degrees. delete The method of claim 3,
The N polygonal patterns
And the polygonal patterns selected at the same angle are arranged in pairs. delete The method of claim 3,
The N polygonal patterns
Wherein the light source is a rectangle or a square. The method according to claim 1,
The multi-angle inspection filter
Wherein the image sensing device is located at a position adjacent to the imaging element. The method according to claim 1,
The vision camera for the alignment inspection
And the image display device is arranged to pick up images of two centers of the patterned retarder film and the attached display panel.

Images