KR20130046745A - System and method for aligning display panel and film patterned retarder in stereoscopic image display - Google Patents

Abstract

PURPOSE: A display panel of a dimensional image displaying device, a queue system of a film pattern retarder and a method are provided to provide a good top and bottom viewing angle regardless of the straightness of the film pattern retarder by aligning a center line center of the film pattern retarder and the display panel. CONSTITUTION: The alignment system comprises a first alignment stage(ST1), a first vision system(VR1-VR5), a second alignment stage(ST2), a second vision system(VP1-VP4), a drum(DR), and a controller(CTRL). The first vision system(VR1-VR5) obtains a center line center image of the film pattern retarder and the first stage(ST1) amends a position error of the film pattern retarder. The second vision system(VP1-VP4) obtains the center line center image of the display panel and the second alignment stage amends the position error of the display panel. The drum receives the film pattern retarder(FPR) from the first alignment stage under a control of the controller, and mounts the film pattern retarder on the display panel(PNL) settled on the second alignment stage.

Description

SYSTEM AND METHOD FOR ALIGNING DISPLAY PANEL AND FILM PATTERNED RETARDER IN STEREOSCOPIC IMAGE DISPLAY}

The present invention relates to a display panel and a film pattern retarder alignment system and method of a stereoscopic image display device.

The stereoscopic image display device implements a 3D image by using a stereoscopic technique or an autostereoscopic technique.

The binocular parallax method uses parallax images of right and left eyes with large stereoscopic effect, and can be divided into a spectacular method and a non-spectacular method. The spectacle method displays polarized images by changing the polarization direction of the left and right parallax images on a direct-view display device or a projector, or time-divisionally, and implements a stereoscopic image using polarized glasses or shutter glasses. Optical components such as parallax barriers and lenticular lenses for separation are installed in front of or behind the display screen to realize stereoscopic images.

In the glasses type stereoscopic image display device, the polarized glasses method requires attaching a polarization separating element such as a patterned retarder to the display panel. The pattern retarder varies polarization of the left eye image and the right eye image displayed on the display panel. When viewing a stereoscopic image on a polarized glasses type stereoscopic display device, the viewer wears polarized glasses to see the polarization of the left eye image through the left eye filter of the polarizing glasses and the polarization of the right eye image through the right eye filter of the polarizing glasses. You can feel the three-dimensional effect.

In contrast, the shutter eyeglasses display the left eye image and the right eye image alternately on the display panel without attaching a separate polarization splitting element to the display panel, and open the left eye shutter of the shutter glasses to synchronize with the left eye image and synchronize with the right eye image. Open the right eye shutter of the shutter glasses as much as possible. When the viewer views the stereoscopic image in the shutter glasses type stereoscopic display device, the viewer may alternately view the left-eye image and the right-eye image, which are time-divided by wearing the shutter glasses, so that the viewer may feel the stereoscopic feeling.

The shutter glasses type stereoscopic image display device does not need to add a polarization splitting element to the display panel, so the price of the display panel is small, but the price is high because it requires expensive shutter glasses. In view of 3D image quality, the shutter glasses type stereoscopic image display device is vulnerable to flicker and 3D crosstalk since the left eye image and the right eye image are time-divided at predetermined time intervals. On the other hand, the polarized glasses type stereoscopic image display device adds a polarized light splitting element such as a pattern retarder to the display panel so that the display panel price increases slightly, but since the use of low priced polarized glasses, the overall system price is higher than that of the shutter glasses method. low. In terms of image quality, the polarized glasses type stereoscopic image display device displays both the left eye image and the right eye image simultaneously on the display panel, and is separated by lines, so the level of flicker and 3D crosstalk is lower than that of the shutter glasses type stereoscopic image display device. .

The pattern retarder is divided into a glass pattern retarder (GPR) in which a pattern retarder is formed on a glass substrate, and a film pattern retarder (FPR) in which a pattern retarder is formed on a film substrate. Recently, the film pattern retarder (FPR), which can reduce the thickness, weight, price, etc. of the display panel, is preferred to the glass pattern retarder.

The alignment and bonding method of the display panel and the pattern retarder in the polarized glasses type stereoscopic image display is a very important technology that determines the 3D display quality. The film pattern retarder may be degraded in straightness because the strength of the base film is inferior and flexible. It is difficult to align the film pattern retarder having a low straightness to the display lines of the display panel having the high straightness because the polarization selection patterns are curved. In addition, due to the low linearity of the film pattern retarder, when the display panel and the film pattern retarder are misaligned, the vertical angle of view of the stereoscopic image display device may be narrowed, or a problem of viewing angle that causes different upper and lower viewing angles may occur. Can be.

The present invention provides a display panel and a pattern retarder alignment system and method of a stereoscopic image display device that can prevent a phenomenon in which vertical and vertical viewing angle defects occur when the straightness of the film pattern retarder is low.

The alignment system of the present invention comprises a first vision system for obtaining a center line center image of the film pattern retarder; A first stage of correcting a position error of the film pattern retarder; A second vision system for obtaining a center line center image of the display panel; A second stage for correcting a position error of the display panel; And a controller for controlling at least one of the first and second stages to match the center line center of the film pattern retarder with the center line center of the display panel within a predetermined allowable alignment margin.

The distance between the center of the center of the film pattern retarder and the center of the center line of the display panel is equal to or less than the distance between the center line edge of the film pattern retarder and the center line of the display panel.

The alignment system is rotated under the control of the controller when the center of the center of the film pattern retarder coincides with the center of the center line of the display panel within a predetermined allowable alignment margin, thereby bringing the film pattern retarder to the display panel. It further comprises a drum for bonding.

The first vision system may include: first and second vision modules configured to capture images of both edges of a dummy pattern formed at an upper or lower edge of the film pattern retarder; And third and fourth vision modules for capturing the image of both edges of the center line of the film pattern retarder.

The controller moves one of the first vision system and the first stage to obtain a center line center image of the film pattern retarder through any one of the first to fourth vision modules.

The first vision system may include: first and second vision modules configured to capture images of both edges of a dummy pattern formed at an upper or lower edge of the film pattern retarder; Third and fourth vision modules configured to capture images of edges at both sides of the center line of the film pattern retarder; And a fifth vision module configured to capture a center line center image of the film pattern retarder.

The center line of the film pattern retarder is set as a boundary between retardation patterns located at the center of the film pattern retarder.

The alignment method of the present invention includes detecting a center line center position of the film pattern retarder; Detecting a center line center position of the display panel; And matching the center line center of the film pattern retarder to the center line center of the display panel within a predetermined allowable alignment margin.

The present invention aligns the center line center of the film pattern retarder with the center line center of the display panel within a predetermined allowable alignment margin. As a result, the present invention can align the center of the center line of the film pattern retarder and the display panel to obtain a good vertical viewing angle in the image display device regardless of the straightness of the film pattern retarder.

1A through 1D are diagrams illustrating an alignment system and a method of aligning a display panel and a film pattern retarder of a stereoscopic image display device according to the present invention.
FIG. 2 is a plan view illustrating a structure of the film pattern retarder illustrated in FIGS. 1A to 1D.
3 is a perspective view showing a film pattern retarder and a first vision system.
4 is a perspective view illustrating a display panel and a second vision system.
5 is a diagram illustrating an example in which the film pattern retarder and the display panel are ideally aligned when the film pattern retarder has a high straightness.
FIG. 6 illustrates an example in which a gap exists between the film pattern retarder and the center lines of the display panel when the film pattern retarder has a low straightness.
7A and 7B are views illustrating a phenomenon in which the vertical viewing angle is narrowed when the straightness of the film pattern retarder is low.
8A to 8F illustrate various examples of inferior top and bottom viewing angles when aligned with the display panel due to the low straightness of the film pattern retarder.
9A to 9C are diagrams illustrating a center line alignment state of the film pattern retarder and the display panel aligned by the display system and the film pattern retarder alignment system and the alignment method of the stereoscopic image display device of the present invention.
10A through 10F are diagrams illustrating a center line of a film pattern retarder and a display panel that may prevent top and bottom viewing angle defects in center line bending examples of various film pattern retarders.
FIG. 11 is a view showing an allowable alignment margin between center lines in the center of the center line of the film pattern retarder and the display panel.
12A and 12B illustrate a method of capturing a center line center image of a film pattern retarder using a first vision system including four cameras.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, when it is determined that a detailed description of known functions or configurations related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The stereoscopic image display device of the present invention is implemented as a polarized glasses type stereoscopic image display device in which a film pattern retarder is bonded to a display panel and polarizing glasses are required.

1A to 1D are diagrams illustrating an alignment system of a display panel and a film pattern retarder, and an alignment method thereof, of a stereoscopic image display device according to an exemplary embodiment of the present invention.

1A to 1D, the alignment system of the present invention includes a first alignment stage ST1, a first vision system VR1 to VR5, a second alignment stage ST2, and a second vision system ( VP1 to VP4), drum DR, controller CTRL, and the like.

The first alignment stage ST1 adsorbs the film pattern retarder FPR and finely sets the posture of the film pattern retarder FPR in the x-axis, y-axis, and θ-axis directions as shown in FIG. 3 under the control of the controller CTRL. Adjust to correct the position error of the pattern retarder (FPR). The first alignment stage ST1 may be linearly moved by the robot so that the first alignment stage ST1 may move forward and retreat toward the drum DR.

The film pattern retarder FPR includes first and second retardation patterns PR1 and PR2 for separating polarization of the left eye image and polarization of the right eye image, as shown in FIG. 2. The film pattern retarder FPR includes dummy patterns DUM1 and DUM2 disposed at upper and lower ends, respectively, and having a wider width than the first and second retardation patterns PR1 and PR2.

In the film pattern retarder FPR, the optical axes of the first and second retardation patterns PR1 and PR2 are perpendicular to each other. The first and second retardation patterns PR1 and PR2 divide polarizations of the left eye image and the right eye image displayed on the display panel PNL. The optical axes of the first and second retardation patterns PR1 and PR2 are perpendicular to each other. For example, the first retardation pattern PR1 may delay the phase of the light incident from the odd-numbered line by a quarter wavelength in the pixel array of the display panel PNL to counteract the odd-numbered line. The light of the displayed left eye image (or right eye image) is transmitted through right circularly polarized light. The second retardation pattern PR2 is a right-eye image displayed on the even-numbered line by delaying a phase of light incident from the even-numbered line by 3/4 wavelength in a pixel array of the display panel PNL. (Or left eye image) light is transmitted through left circularly polarized light.

The dummy patterns DUM1 and DUM2 have polarization characteristics of any one of the first and second retardation patterns PR1 and PR2. The upper dummy pattern DUM1 may have the same polarization characteristics as the lower dummy pattern DUM2, or may have different polarization characteristics from the lower dummy pattern DUM2. The dummy patterns DUM1 and DUM2 do not face the pixels of the pixel array. The dummy patterns DUM1 and DUM2 are used as reference patterns for checking the upper and lower edge positions of the pattern retarder FPR when the film pattern retarder FPR and the display panel PNL are aligned.

The first vision systems VR1 to VR5 transfer images obtained by capturing five edge positions of the film pattern retarder FPR fixed on the first alignment stage ST1 to the controller CTRL. The first and second vision modules VR1 and VR2 image two dummy pattern images on both sides of the top or bottom of the film pattern retarder FPR. The 3rd and 4th vision modules VR3 and VR4 pick up the image of two places in the center both sides of the film pattern retarder FPR. The fifth vision module VR5 picks up the center line center image of the film pattern retarder FPR. The fifth vision module VR5 may be omitted. For example, when the first to fourth vision modules VR1 to VR4 are moved or the first alignment stage ST1 is moved, as shown in FIGS. 12A and 12B, any one of the first to fourth vision modules VR1 to VR4. The center line center image of the film pattern retarder FPR can be imaged. Using the fifth vision module VR5, it is necessary to further move the film pattern retarder FPR or the first vision systems VR1 to VR5 to obtain the center line center image of the film pattern retarder FPR. none. The first vision systems VR1 to VR5 serve as image sensors for detecting a preset position in the film pattern retarder FPR under the control of the controller CTRL.

Each of the vision modules of the first vision systems VR1 to VR5 includes a camera (or an image sensor) and a polarizing plate provided between the camera lens and the film pattern retarder FPR. The polarizing plate passes only the polarized light incident from any one of the first retardation pattern PR1 or the second retardation pattern PR2 of the film pattern retarder FPR. In the images captured by the vision modules VR1 to VR5, one of the first and second retardation patterns PR1 and PR2 may appear as a bright white gray level, while the other may be viewed as a dark black gray level. For such a vision system, a vision module disclosed in Korean Patent Application No. 10-2010-0035184 (2010-04-16), Korean Patent Application No. 10-2010-0132520 (2010-12-22), etc. previously filed by the present applicant can be used. have.

Since the distance between the dummy patterns DUM1 and DUM2 and the center line is pre-stored in the film pattern retarder FPR, the controller CTRL checks the dummy patterns DUM1 and DUM2 and checks the dummy patterns DUM1 and DUM2. The position of the center line of the film pattern retarder (FPR) spaced by a predetermined distance from the can be seen. The center line of the film pattern retarder FPR may be set as a boundary line between the first and second retardation patterns PR1 and PR2 positioned at the center of the film pattern retarder FPR without being formed by a separate process. have.

The controller CTRL may check the images captured by the first and second vision modules VR1 and VR2 to check the dummy patterns DUM1 and DUM2 of the film pattern retarder FPR. The controller CTRL may adjust the posture of the film pattern retarder FPR seated on the first stage ST1 based on the images captured by the third and fourth vision modules VR3 and VR4 in the θ-axis direction. have. The controller CTRL may determine the center line position at the center of the film pattern retarder FPR by analyzing the image captured by the fifth vision module VR5, and captured by the fifth vision module VR5. The degree of warpage of the patterns PR1 and PR2 of the film pattern retarder FRP may be determined by comparing and analyzing the image and the images captured by the third and fourth vision modules VR3 and VR4.

The display panel PNL is a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an organic light emitting diode display (Organic Light Emitting Display). , OLED), and electrophoretic display devices (EPDs).

The display panel PNL is mounted on the second alignment stage ST2. The second alignment stage ST2 may attract the display panel PNL. The second alignment stage ST2 corrects the position error of the display panel PNL by finely adjusting the posture of the display panel PNL in the x-axis, y-axis, and θ-axis directions as shown in FIG. 4 under the control of the controller CTRL. do. The second alignment stage ST2 may be linearly moved by the robot to move forward and retract toward the drum DR.

The first and second vision modules VP1 and VP2 of the second vision systems VP1 to VP4 correspond to the upper or lower dummy patterns of the film pattern retarder FPR on the second alignment stage ST2. Images of two alignment marks M1 and M2 at both upper and lower sides of the PNL are captured. The third and fourth vision modules VP3 and VP4 of the second vision systems VP1 to VP4 may display the display panel PNL corresponding to both center patterns of the film pattern retarder FPR on the second alignment stage ST2. Images of the alignment marks M3 and M4 at two locations on both sides of the center. The second vision systems VP1 to VP4 serve as image sensors for detecting a preset position in the display panel PNL under the control of the controller CTRL.

The straightness of the display panel PNL is very high due to substrate characteristics. Accordingly, the controller CTRL may analyze the images captured by the third and fourth vision systems VP3 and VP4 to determine the center line of the display panel PNL with almost no error. The center line of the display panel PNL may be set as a boundary between display lines positioned at the center of the pixel array. The third and fourth alignment marks M3 and M4 formed on both sides of the center of the display panel PNL indicate the center line position of the display panel PNL.

The drum DR is installed between the first alignment stage ST1 and the second alignment stage ST2. The drum DR may be rotated by a motor under the control of the controller CTRL and may be moved in the vertical direction or in the vertical and horizontal directions by the linear guide means. The drum DR receives the film pattern retarder FPR from the first alignment stage ST1 under the control of the controller CTRL, and mounts the film pattern retarder FPR on the second alignment stage ST2. Fixing is performed on the display panel PNL. In order to stably wind the film pattern retarder FPR on the drum DR, an adhesive layer having a weak viscosity may be formed or adsorption mechanisms may be formed on the drum DR.

The controller CTRL controls the entire alignment process of the display panel PNL and the film pattern retarder FPR by controlling a series of operations of all components constituting the alignment system according to a preset alignment program.

The alignment method of the display panel PNL and the film pattern retarder FPR will be described below.

The present invention checks the alignment of the film pattern retarder FPR through the first vision system VR1 to VR5 after fixing the film pattern retarder FPR on the first alignment stage ST1 as shown in FIG. 1A. . In the controller CTRL, the distance between the dummy patterns DUM1 and DUM2 and the retardation patterns PR1 and PR2 positioned in the center is stored in advance in the film pattern retarder FPR. The controller CTRL checks the position of any one of the dummy patterns DUM1 and DUM2 based on the dummy pattern images acquired by the first and second vision modules VR1 and VR2, and the first alignment stage ST1. To move the film pattern retarder (FPR) by a predetermined distance in the y-axis direction. At this time, the attitude of the film pattern retarder FPR may be adjusted in the x-axis and θ-axis directions by the first alignment stage ST1.

The controller CTRL checks the position of any one of the dummy patterns DUM1 and DUM2 based on the dummy pattern images acquired by the first and second vision modules VR1 and VR2, and the first alignment stage ST1. To move the film pattern retarder (FPR) by a predetermined distance in the y-axis direction.

The controller CTRL matches the center line of the identified film pattern retarder FPR with the preset virtual reference line based on the images acquired from the third and fourth vision modules VR3 and VR4. The virtual reference line is a line which is preset in the controller CTRL and displayed on the monitor. At the same time, the controller CTRL includes a central image of the film pattern retarder FPR obtained from the fifth vision module VR3 and a film pattern retarder obtained from the third and fourth vision modules VR3 and VR4. The images of the centers of both sides of the FPR are compared to determine the degree of warpage of the center line of the film pattern retarder FPR and the center line position at the center of the film pattern retarder FPR. Based on this determination result, the controller CTRL displays the center of the center line of the film pattern retarder FPR within the predetermined allowable alignment margin (ΔG in FIG. 11) as shown in FIGS. 9 to 11. Match the center line to the center.

Subsequently, after the film pattern retarder FPR is aligned on the first alignment stage ST1, the present invention moves the first alignment stage ST1 toward the drum DR or removes the drum DR as shown in FIG. 1B. 1 Move the alignment stage ST1 to contact the surface of the drum DR with the film pattern retarder FPR, and then rotate the drum DR counterclockwise to move the film pattern retarder FPR to the drum DR. Move to. Next, the present invention peels the release film of the film pattern retarder (FPR) on the drum DR to expose the pressure-sensitive adhesive of the film pattern retarder (FPR). The release film may be peeled off manually or automatically peeled off by an automatic peeling device (not shown).

Subsequently, the present invention arranges the display panel PNL based on the images of the alignment marks M1 to M4 of the display panels PNL obtained through the second vision systems VP1 to VP4 as shown in FIG. 1C. If there is an error in the alignment state of the display panel PNL from a desired position, the second alignment stage ST2 is driven to adjust the alignment state of the display panel PNL. The controller CTRL matches the center line of the identified display panel PNL to the reference line based on the images of the alignment marks M3 and M4 obtained from the third and fourth vision modules VP3 and VP4.

The present invention controls at least one of the first and second stages ST1 and ST2 to match the center line center of the film pattern retarder to the center line center of the display panel within a predetermined allowable alignment margin. Let's do it. For example, as described above, the center line of the center of the film pattern retarder FPR may coincide with the center line of the display panel PNL through the reference line. When the film pattern retarder FPR is aligned with the display panel PNL, the present invention moves the second alignment stage ST2 toward the drum DR, or moves the drum DR to the second alignment stage ST2. The adhesive of the film pattern retarder FPR wound around the drum DR is brought into contact with the surface of the display panel PNL. Subsequently, the present invention adheres the film pattern retarder FPR onto the display panel PNL while rotating the drum DR counterclockwise as shown in FIG. 1D.

FIG. 5 illustrates an example in which the film pattern retarder FPR and the display panel PNL are ideally aligned when the straightness of the film pattern retarder FPR is high. FIG. 6 illustrates an example in which a gap exists between center lines of the film pattern retarder FPR and the display panel PNL when the straightness of the film pattern retarder FPR is low.

When the straightness of the film pattern retarder FPR is high, the straightness of the center line FPRC of the film pattern retarder FPR is high. In this case, as shown in FIG. 6, the center line PNL of the film pattern retarder FPR may be evenly aligned with the center line PNLC of the display panel PNL. In this case, the vertical viewing angle of the stereoscopic image display device is wide. However, the film pattern retarder (FPR) may have a low straightness due to the low strength and flexibility of the base film. In this case, the progress of the center line FPRC of the film pattern retarder FPR is also lowered.

When aligning the film pattern retarder (FPR) having a low straightness to the display panel (PNL), the center lines of both sides of the film pattern retarder (FPR) are aligned with the alignment marks (M3, M4) at both sides of the center of the display panel (PNL). When matched to the center of the film pattern retarder FPR and the display panel PNL, the center line FPRC of the film pattern retarder FPR and the center line PNLC of the display panel PNL as shown in FIG. There may be a gap between). As such, when a gap exists between the center of the center line FPR of the film pattern retarder FPR and the center of the center line PNLC of the display panel PNL, the vertical viewing angle of the vertical stereoscopic image display device is narrowed.

The user may view a stereoscopic image of the display panel PNL through the film pattern litter FPR by wearing polarized glasses. The left eye polarization filter of the polarizing glasses passes only the first polarization of the left eye image incident through the first retardation pattern PR1, while the right eye filter of the polarization glasses is incident through the second retardation pattern PR2. Pass only the second polarization of the image.

7A and 7B are views showing vertical viewing angles confirmed through experiments when the straightness of the film pattern retarder (FPR) is low.

Instead of checking the center line center position of the film pattern retarder FPR, the alignment marks M3 and M4 positioned on both sides of the center line of the film pattern retarder FPR and the center line of the display panel PNL are removed. As a reference, the film pattern retarder FPR may be aligned and bonded to the display panel PNL. When the film pattern retarder (FPR) is aligned and bonded to the display panel (PNL) in this way, misalignment occurs at the center of the center line of the film pattern retarder (FPR) and the film pattern retarder (FPR). do. When the center line center of the film pattern retarder FPR is bent convexly above both sides of the center line as shown in FIG. 7A, the center line center of the film pattern retarder FPR is larger than the center line center of the display panel PNL. It is located above. In this case, as the distance between the center line center of the film pattern retarder FPR and the center line center of the display panel PNL increases, the lower viewing angle lower than the front viewing angle of the stereoscopic image display device becomes narrower.

On the other hand, when the center line center of the film pattern retarder FPR is bent below both sides of the center line, as shown in FIG. 7B, the center line center of the film pattern retarder FPR is lower than the center line center of the display panel PNL. Located in In this case, as the distance between the center line center of the film pattern retarder FPR and the center line center of the display panel PNL increases, the image viewing angle higher than the front viewing angle of the stereoscopic image display device becomes narrower.

The front viewing angle is a viewing angle at which the screen of the stereoscopic image display device is viewed from the front. When the front viewing angle is set to 0 °, the upper viewing angle is + θ ° and the lower viewing angle is -θ °. As shown in FIG. 5, when the straightness of the film pattern retarder FPR is high, the observer feels when the center line FPRC of the film pattern retarder FPR and the center line PNLC of the display panel PNL are ideally aligned. The upper and lower viewing angles having no problem in stereoscopic image quality are almost the same. In contrast, experimentally, as shown in FIG. 7A, when the film pattern retarder FPR and the display panel PNL are aligned, the upper viewing angle is widened while the lower viewing angle is narrowed. On the other hand, as shown in FIG. 7B, when the film pattern retarder FPR and the display panel PNL are aligned, the lower viewing angle is widened while the upper viewing angle is narrowed. 8A to 8F illustrate that the center line of the film pattern retarder FPR is deformed into various shapes according to the low straightness of the film pattern retarder FPR, and as a result, the vertical viewing angle is poor when aligned with the display panel PNL. Figures show examples resulting in the following.

7A to 8F, even when the straightness of the film pattern retarder (FPR) is low, the upper and lower viewing angles of the stereoscopic image display apparatus with respect to the upper and lower viewing angles of the three-dimensional image display, the film pattern can secure a wide upper and lower viewing angle It is necessary to align the retarder FPR and the display panel PNL. To this end, according to the present invention, as shown in FIGS. 9A through 9C, the center of the center line of the film pattern retarder FPR may be the center of the display panel PNL regardless of the straightness and the degree of warpage of the film pattern retarder FPR. The center coincides with a predetermined allowable alignment margin (ΔG in FIG. 11). When the center line center of the film pattern retarder FPR coincides with the center line center of the display panel PNL, the center line center B and the display panel of the film pattern retarder FPR as shown in FIGS. 9A and 9C. The distance between the center line center B of the PNL is smaller than the distance between the center line both edges A and C of the film pattern retarder FPR and the center line both edges A and C of the display panel PNL. Lose.

The allowable alignment margin (ΔG in FIG. 11) includes an alignment error range in which the upper and lower viewing angles at which the user does not feel the crosstalk in which the left eye image and the right eye image overlap when the user views the stereoscopic image display device are equal to or higher than the goodness standard. For example, the acceptable alignment margin can be set at around 50 μm. The vanity alignment margin may vary depending on the structural characteristics of the display panel PNL and the film pattern retarder (FPR), such as the spacing, pixel size, and resolution between the pixel array of the display panel (PNL) and the film pattern retarder (FPR). Note that it is not limited to 50 μm.

9A to 9C are diagrams illustrating a center line alignment state of the film pattern retarder and the display panel aligned by the display system and the film pattern retarder alignment system and the alignment method of the stereoscopic image display device of the present invention.

When the center line center of the film pattern retarder FPR is bent convexly upward than both sides of the center line as shown in FIG. 9A, the present invention allows the center line center B of the film pattern retarder FPR to be predetermined. The center line B of the display panel PNL is aligned within the alignment margin. As a result, when the film pattern retarder FPR as shown in FIG. 9A is aligned and bonded to the display panel PNL, edges A and C of both center lines of the film pattern retarder FPR are displayed on the display panel PNL. The center line of the two sides is struck below the edges (A, C). In addition, the distance between the center line center B of the film pattern retarder FPR and the center line center B of the display panel PNL is indicated by the edges A and C of the center line of the film pattern retarder FPR. It is smaller than the distance between the edges A and C of the center line of the panel PNL.

Even when the straightness of the film pattern retarder (FPR) is high as shown in FIG. 9B, the center line of the film pattern retarder (FPR) is straight, within the predetermined allowable alignment margin. It coincides with the center line center B of the display panel PNL. As a result, when the film pattern retarder FPR as shown in FIG. 9B is aligned and bonded to the display panel PNL, the center line center B of the film pattern retarder FPR and the display panel PNL and the film pattern The edges A and C of the center line of the retarder FPR and the display panel PNL form a substantially straight line. In addition, the distance between the center line center B of the film pattern retarder FPR and the center line center B of the display panel PNL is indicated by the edges A and C of the center line of the film pattern retarder FPR. The spacing between the edges A and C of the center line of the panel PNL is substantially equal.

When the center line center of the film pattern retarder FPR is struck below both sides of the center line as shown in FIG. 9C, the present invention provides a predetermined acceptable alignment of the center line center B of the film pattern retarder FPR. The margin coincides with the center line center B of the display panel PNL. As a result, when the film pattern retarder FPR as shown in FIG. 9C is aligned and bonded to the display panel PNL, edges A and C of the center lines of the film pattern retarder FPR are displayed on the display panel PNL. Rise above the edges (A, C) of the center line. In addition, the distance between the center line center B of the film pattern retarder FPR and the center line center B of the display panel PNL is indicated by the edges A and C of the center line of the film pattern retarder FPR. It is smaller than the distance between the edges A and C of the center line of the panel PNL.

10A through 10F are diagrams illustrating a center line of a film pattern retarder and a display panel that may prevent top and bottom viewing angle defects in center line bending examples of various film pattern retarders.

As can be seen in Figures 9a to 10f, the present invention is to allow a predetermined allowable center line center (B) of the film pattern retarder (FPR) regardless of the degree or type of straightness of the film pattern retarder (FPR) The center line B of the display panel PNL is aligned within the alignment margin. When the film pattern retarder FPR and the display panel PNL are aligned in this manner, when they are bonded, at the center line interval of the film pattern retarder FPR and the display panel PNL as shown in FIGS. 9A to 10F, B The position interval is less than or equal to the A or C position interval.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the present invention should not be limited to the details described in the detailed description, but should be defined by the claims.

ST1, ST2: Alignment stage VR1 ~ VR5, VP1 ~ VP4: Vision system
DR: Drum CTRL: Controller

Claims (10)

A first vision system for obtaining a center line center image of the film pattern retarder;
A first stage of correcting a position error of the film pattern retarder;
A second vision system for obtaining a center line center image of the display panel;
A second stage for correcting a position error of the display panel; And
And a controller for controlling at least one of the first and second stages to match the center line center of the film pattern retarder to the center line center of the display panel within a predetermined acceptable alignment margin. An alignment system of a display panel of a stereoscopic image display device and a film pattern retarder. The method of claim 1,
The distance between the center line center of the film pattern retarder and the center line center of the display panel is less than the distance between the center line edge of the film pattern retarder and the center line edge of the display panel. Alignment system of panel and film pattern retarder. The method of claim 1,
If the center of the center of the film pattern retarder coincides with the center of the center line of the display panel within a predetermined allowable alignment margin, the drum is rotated under the control of the controller to adhere the film pattern retarder to the display panel. The alignment system of the display panel and the film pattern retarder of the stereoscopic image display device further comprising. The method of claim 1,
The first vision system,
First and second vision modules configured to photograph both edge images of the dummy pattern formed at the top or bottom edge of the film pattern retarder; And
And a third and fourth vision module for capturing images of edges at both sides of the center line of the film pattern retarder. The method of claim 4, wherein
Wherein the controller moves any one of the first vision system and the first stage to obtain a center line center image of the film pattern retarder through any one of the first to fourth vision modules. Alignment system of the display panel of the video display device and the film pattern retarder. The method of claim 1,
The first vision system,
First and second vision modules configured to photograph both edge images of the dummy pattern formed at the top or bottom edge of the film pattern retarder;
Third and fourth vision modules configured to capture images of edges at both sides of the center line of the film pattern retarder; And
And a fifth vision module configured to capture a center line center image of the film pattern retarder. 7. The method according to any one of claims 1 to 6,
The film pattern retarder,
A plurality of retardation patterns for dividing the polarization of the left eye image and the right eye image displayed on the display panel;
And a center line of the film pattern retarder is set as a boundary between retardation patterns positioned at the center of the film pattern retarder. Detecting a center line center position of the film pattern retarder;
Detecting a center line center position of the display panel; And
Aligning the center of the center line of the film pattern retarder with the center of the center line of the display panel within a predetermined allowable alignment margin. Way. The method of claim 8,
The distance between the center line center of the film pattern retarder and the center line center of the display panel is less than the distance between the center line edge of the film pattern retarder and the center line edge of the display panel. How to align the panel and film pattern retarder. The method of claim 8,
Adhering the film pattern retarder to the display panel when the center of the center of the film pattern retarder coincides with the center line of the display panel within a predetermined acceptable alignment margin. Alignment method of display panel and film pattern retarder of stereoscopic image display device.

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