KR102276252B1 - Stereoscopic display device including 3-dimension filter having compensating attachment error and method of compensating attachment error of 3-dimension filter - Google Patents

Abstract

The stereoscopic image display device according to the present invention detects a sub-pixel that overlaps by a ray tracing method when an attachment error between the lenticular lens plate and the display panel occurs, and then responds to the sub-pixel corresponding to the overlapped sub-pixel. When a new view pattern is created by allocating a new view to a view, and the image of sub-pixels of another group is invaded through another lenticular lens due to an attachment error between the lenticular lens plate and the display panel, a duplicate view occurs in the view pattern , modify the view pattern by replacing it with an optimal view pattern among adjacent view patterns that can be modified.

Description

A stereoscopic image display device and method for correcting attachment error of 3D filter

The present invention relates to a stereoscopic image display device, and in particular, a 3D filter for realizing a stereoscopic image, such as a lenticular lens and a parallax barrier, which can compensate for degradation of the image quality of a stereoscopic image due to an attachment error when attaching it. It relates to a display device and an attachment tolerance correction method.

A 3D display can be said to be "the totality of a system that artificially reproduces a 3D screen". Here, the system includes a software technology that can be viewed in 3D and hardware that actually implements the contents made by the software technology in 3D. The reason for including the software area is that, in the case of 3D display hardware, content composed of a separate software method is required for each three-dimensional implementation method.

In addition, the virtual 3D display uses binocular disparity, which appears because our eyes are about 65 mm apart in the horizontal direction, among various factors that allow people to feel a three-dimensional effect, so that a person can literally feel a three-dimensional effect in a flat display hardware. is the totality of the system. In other words, even if our eyes look at the same object due to binocular disparity, each of us sees slightly different images (to be more precise, each has a small amount of left and right spatial information), and when these two images are transmitted to the brain through the retina, the brain By precisely merging each other, we can feel a three-dimensional effect. Using this, two images on the left and right are displayed simultaneously on a 2D display device and sent to each eye to create a virtual three-dimensional effect. This is the virtual 3D display.

In order to display an image of two channels on a single screen in such a virtual 3D display hardware device, in most cases, one screen is outputted one by one while changing the lines in one horizontal or vertical direction one by one. When images of two channels are simultaneously output from one display device, the right image enters the right eye as it is in the case of the glasses-free method due to the hardware structure, and the left image enters only the left eye. In addition, in the case of the method of wearing glasses, a method of covering the right image so that the left eye cannot see it and the left image so that the right eye cannot see it is used through special glasses suitable for each method.

As such, the most important factor for a person's sense of three-dimensionality and depth is binocular disparity due to the distance between the two eyes, but there is also a deep relationship to psychological and memory factors. It is usually divided into a volumetric type, a holographic type, and a stereoscopic type based on whether the 3D image information can be provided.

The volume expression method is a method to feel a sense of perspective in the depth direction by psychological factors and suction effects, and is a 3D computer graphic that displays perspective, overlap, shading, contrast, and movement by calculation, or viewing angle to an observer. It is being applied to so-called IMAX movies, which provide an optical illusion of being sucked into the space by providing this wide screen.

The three-dimensional expression method, which is known as the most complete stereoscopic image realization technology, can be represented by laser light reproduction holography or white light reproduction holography.

And, the three-dimensional expression method is a method to feel a three-dimensional effect using physiological factors of both eyes, and as described above, when a flat related image including parallax information is seen in the left and right eyes of a human that are located about 65 mm apart, the brain In the process of merging them, the ability to create spatial information before and after the display surface to feel a three-dimensional effect, that is, stereoography is used. Such a three-dimensional expression method is largely divided into a method of wearing glasses and a method of not wearing glasses.

Representative examples of a method for not wearing glasses include a lenticular lens method in which a lenticular lens plate in which cylindrical lenses are vertically arranged in front of a display panel and a parallax barrier method.

1 is a view for explaining the concept of a general lenticular lens type stereoscopic image display device, and shows the relationship between the rear distance (S) of the lens and the viewing distance (d).

Also, FIG. 2 is a view showing, for example, a stereoscopic image display device and a light profile of a general lenticular lens type.

At this time, the center of FIG. 2 shows a viewing diamond forming a viewing zone, an optical profile, and view data, and the lower part of FIG. 2 schematically shows a view actually recognized in the viewing diamond, have.

1 and 2, a general lenticular lens type stereoscopic image display device includes an upper substrate and a lower substrate, a liquid crystal panel 10 filled with liquid crystal between the upper substrate and the lower substrate, and a liquid crystal panel 10 ) and a backlight unit (not shown) for irradiating light and a lenticular lens plate 20 disposed on the front side of the liquid crystal panel 10 to implement a stereoscopic image.

The lenticular lens plate 20 is formed by forming a plurality of lenticular lenses 25 formed of a material layer having a convex lens-shaped upper surface on a flat substrate. The lenticular lens plate 20 serves to divide the left-eye image and the right-eye image, and at the optimal viewing distance d from the lenticular lens plate 20, the images corresponding to the left and right eyes normally reach the left and right eyes respectively. A diamond-shaped viewing diamond (mechanical region) 30 is formed.

One width of the viewing diamond 30 is formed to be the size of the viewer's binocular distance e, which is to recognize a stereoscopic image by inputting images having parallaxes in the viewer's left and right eyes, respectively.

At this time, view data of a corresponding sub-pixel of the liquid crystal panel 10 , that is, an image is formed in each viewing diamond 30 . The view data refers to an image captured by a camera that is spaced apart by the standard of the distance (e) between the eyes.

In such a general lenticular lens type stereoscopic image display device, the liquid crystal panel 10 and the lenticular lens plate 20 are supported by a mechanism (not shown), and the liquid crystal panel 10 and the lenticular lens plate 20 are separated by a predetermined distance. (rear distance; S). At this time, in the general lenticular lens type stereoscopic image display device, the gap glass 26 is inserted to keep the rear distance S constant.

As described above, since the lenticular lens type stereoscopic image display apparatus is implemented in a multi-view method formed according to an initially designed view-map, a 3D image is displayed when a viewer enters a predetermined view area. can watch

However, in the lenticular lens type stereoscopic image display device having the above structure, the following problems occur.

In the lenticular lens type stereoscopic image display device, the lenticular lens plate 20 is attached to the liquid crystal panel 10 with the gap glass 26 interposed therebetween. At this time, the lenticular lens plate 20 is attached by a mechanical method using an attachment device. Therefore, when attaching the lenticular lens plate 20 by a mechanical method, the lenticular lens plate 20 is not attached to the set precise position due to a process error or a process margin, but is attached to a position slightly deviated from the set position. This attachment error does not accurately reach the user's left and right eyes by separating the left and right eye images, but causes 3D crosstalk in which a part of the right eye image is mixed in the user's left eye or a part of the left eye image is mixed in the right eye. , a defect occurs in the stereoscopic image.

The present invention has been made in view of the above, and when an error occurs when attaching a lenticular lens plate to a display panel, to provide a stereoscopic image display device and an error correction method capable of correcting the error by correcting the view pattern aim to

In order to achieve the above object, a stereoscopic image display device according to the present invention detects sub-pixels overlapping by a ray tracing method when an attachment error between the lenticular lens plate and the display panel occurs, and then the overlapping A new view pattern is created by allocating a new view to the view corresponding to the generated sub-pixel.

In addition, in the present invention, when images of sub-pixels of different groups are invaded through different lenticular lenses due to an attachment error between the lenticular lens plate and the display panel, and overlapping views occur in the view pattern, it is optimal among adjacent view patterns that can be corrected. Modify the view pattern by replacing it with the view pattern of .

By applying the view map formed by the generation and correction of the sub-pattern, even when an attachment error between the lenticular lens plate and the display panel occurs, 3D defects caused by 3D crosstalk can be minimized.

When an error occurs when attaching the lenticular lens plate to the display panel, the stereoscopic image display device according to the present invention generates a view pattern for sub-pixels in the region where the error occurs and corrects the generated view pattern. , it is possible to eliminate defects such as 3D crosstalk caused by an attachment error when implementing a 3D image.

In addition, in the present invention, since a separate process or mechanism is not required by correcting the mechanical error by the software method rather than by the mechanical method, a separate cost for correcting the attachment error does not occur.

1 is a view for explaining the concept of a stereoscopic image display device of a general lenticular lens method.
2 is a view showing, for example, a stereoscopic image display device of a general lenticular lens type and an optical profile.
3 is a perspective view schematically showing an autostereoscopic image display device according to the present invention.
4 is a diagram illustrating a cross-sectional structure of a lenticular lens type stereoscopic image display device according to the present invention.
5 is a perspective view schematically showing the lenticular lens plate shown in FIG.
6 is a block diagram showing the structure of a control unit of a stereoscopic image display device according to the present invention.
7 is a flowchart illustrating a method of correcting an attachment error of a lenticular lens plate of a stereoscopic image display device according to the present invention.
8A and 8B are diagrams illustrating a method of detecting an overlapping view sub-pixel by a ray tracing method.
9A-9E are diagrams illustrating a method of generating a view pattern for a view-overlapping sub-pixel;
10A-10D are diagrams illustrating a method of correcting a view pattern in which view overlap has occurred;
11A and 11B are views showing images of a conventional stereoscopic image display apparatus and a stereoscopic image display apparatus according to the present invention, respectively;

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In general, in a stereoscopic image display device of a lenticular lens type, an attachment error of a lenticular lens plate due to a process error, etc. is caused by a mechanical error of the attachment equipment, but becomes worse due to optical characteristics. That is, in the stereoscopic image display device, the light separation is ensured by the lenticular lens and the separated light must be incident on a plurality of views. However, if an error occurs, the light separated by the lenticular lens does not reach the user's eye accurately. There is a problem that the left eye image and the right eye image are mixed. In particular, due to optical characteristics, this phenomenon occurs heavily in the outer region of the display panel. If such optical separation is not reliably achieved, image distortion occurs in the corresponding region, making it impossible to provide an optimized 3D image.

The easiest way to solve such a defect is to detach the attached lenticular lens plate and attach it again when a defect occurs. However, in this case, the process is complicated, and there is a problem in that the lenticular lens plate and the display panel are damaged due to external impact during the separation process, and even the degree of damage is severe and the defective lenticular lens plate and/or display panel are discarded. There were times when I had to.

In the present invention, when an error occurs in the position of the lenticular lens plate due to a process error or the like, the view in which optical separation has not occurred is optically separated by data processing, thereby preventing defects from occurring. As described above, in the present invention, since the defects are handled by data processing rather than by a mechanical method, the manufacturing process is complicated and the problem of damage to the lenticular lens plate and/or display panel due to external impact can be solved. do.

3 is a perspective view schematically illustrating a lenticular lens type stereoscopic image display device according to the present invention.

As shown in FIG. 3 , the lenticular lens type stereoscopic image display device according to the present invention includes a display panel 110 and a lenticular lens plate 120 .

The display panel 110 includes a liquid crystal display panel, an organic light emitting diode panel, a field emission panel, a plasma display panel, and electroluminescence. It may be implemented as a flat panel display device such as a display device (Electroluminescent Panel). In the following description, a liquid crystal panel is used as the display panel 110 as an example, but the present invention is not limited thereto.

When the display panel 110 is a liquid crystal panel, the present invention provides a liquid crystal mode, that is, a twisted nematic (TN) mode, an in-plane switching (IPS) mode, a fringe field switching; It is applicable regardless of FFS) mode and Vertical Alignment (VA) mode.

In addition, although not shown in the drawings, the liquid crystal panel is composed of a first substrate and a second substrate and a liquid crystal layer therebetween to realize an image as a signal is applied from the outside. A plurality of gate lines and data lines that are arranged vertically and horizontally to define a plurality of pixel regions are formed on the first substrate, and a thin film transistor as a switching device is formed in each pixel region, and a pixel electrode is formed on the pixel region. In addition, although not shown in the drawings, the thin film transistor includes a gate electrode connected to a gate line, a semiconductor layer formed by stacking amorphous silicon on the gate electrode, and a source formed on the semiconductor layer and connected to the data line and the pixel electrode. It consists of an electrode and a drain electrode.

Although not shown in the drawings, the second substrate is a color filter composed of a plurality of sub-color filters implementing colors of Red (R), Green (G), and Blue (B), the sub-color It may be formed of a black matrix that separates the filters and blocks light passing through the liquid crystal layer. The first and second substrates configured as described above are bonded to face each other by a sealant (not shown) formed outside the image display area to constitute a liquid crystal panel. This is achieved through a bonding key formed on the first or second substrate. Although not shown in the drawings, the liquid crystal panel includes a pixel for a left eye and a pixel for a right eye to display an image for the left eye and an image for the right eye, respectively.

The display panel 110 may display a multi-view image. In this case, the multi-view image means first to n-th (n is a natural number equal to or greater than 2) view images. The stereoscopic image view can be created by separating the cameras by the distance between the eyes of a normal person and capturing an image of the object. For example, when an object is photographed using four cameras, the display panel 110 may display a four-view stereoscopic image.

A lenticular lens plate 120 including a plurality of lenticular lenses 125 having a predetermined width is disposed on the front surface of the display panel 110 on which the plurality of sub-pixels R, G, and B are disposed.

As shown in FIG. 3 , the arrangement of the plurality of lenticular lenses 125 of the lenticular lens plate 120 is arranged at a first angle with respect to the longitudinal direction (y-axis direction) of the sub-pixels R, G, and B. The sub-pixels R, G, and B of the lenticular lens 125 have a horizontal width w along the lateral direction (x-axis direction) and are arranged in an inclined shape with (θ). It can be set to an integer multiple of R,G,B).

That is, in the stereoscopic image display device according to the present invention, the lenticular lens 125 provided in the lenticular lens plate 120 is positioned at a first angle θ with respect to the longitudinal direction of the sub-pixels R, G, and B. It may be arranged at an inclination. Accordingly, the number of views for viewing a 3D image can be adjusted by the inclined arrangement of the lenticular lens plate 120 with respect to the display panel 110 .

In the lenticular lens plate 120 , the first angle θ inclined with respect to the longitudinal direction of the sub-pixels R, G, B of the lenticular lens 125 is tan ^-1 ((M*Pa)/ (N*Pb)). In this case, Pa is the short-axis pitch of the sub-pixels (R, G, B), Pb is the long-axis pitch of the sub-pixels (R, G, B), and M and N are each an arbitrary natural number. In the transverse direction of the sub-pixels (R, G, B) in the group when a plurality of sub-pixels (R, G, B) are grouped as one group, and one group has passed through the vertices exactly diagonally. is defined as the number of sub-pixels (R, G, B) and the number of sub-pixels (R, G, B) in the longitudinal direction of the sub-pixels (R, G, B). In this case, in general, M and N generally satisfy the value of M/N ≤ 2.

At this time, the numbers assigned to the plurality of sub-pixels R, G, and B located inside one group are arranged by tilting the lenticular lens 125 of the lenticular lens plate 120 at a first angle θ. It becomes the number of views defined as a region in which a 3D image can be viewed of the stereoscopic image display device, and the number assigned to each view becomes the sub-pixels (R, G, B) displayed when viewing a 3D image in each view region.

As described above, the stereoscopic image display device according to the present invention having the lenticular lens plate 120 is effective in terms of improving luminance, and has the effect of improving a viewing angle for viewing a 3D image through an increase in the number of views.

The lenticular lens type stereoscopic image display device having the above configuration is manufactured by attaching the lenticular lens plate 120 to the display panel 110 . However, as described above, since one lenticular lens 125 corresponds to one group consisting of a plurality of sub-pixels R, G, and B, a very minute error occurs when the lenticular lens plate 120 is attached. In this case, the light separated from the lenticular lens 125 does not correspond to the corresponding sub-pixels R, G, and B, resulting in a defect.

In the present invention, in order to prevent such a defect, the view data of the region where the error occurs by processing the data is corrected, which will be described in more detail below.

The attachment error of the lenticular lens plate 120 may occur over the entire display panel 110 , and the degree of error may be large enough to separate and reattach the lenticular lens plate 120 , and to be healed by correcting the viewtator. In some cases it is small. If the error degree is severe, it is practically impossible to correct, so the manufactured stereoscopic image display device must be discarded or the lenticular lens plate 120 must be separated and reattached. However, if the error degree is small, defects can be prevented by correcting the view data. can

Of course, this view data is not identified with the initial view data set by the revision of the view data, but since 3D recognition is achieved by combining the image formed on the user's retina in the brain, it is modified due to the limitations of the human brain When the view data is also recognized by the user's brain, it is recognized as a complete 3D image that can hardly detect defects.

This view data is modified by the control unit. The control unit generates a view pattern of sub-pixels with overlapping views when an attachment error of the lenticular lens plate 120 occurs, and corrects the view pattern when the views overlap within the view pattern to prevent defects.

6 is a block diagram showing the structure of the control unit 160 of the stereoscopic image display device according to the present invention.

As shown in FIG. 6 , the control unit 160 includes a failure determination unit 162 that determines that the attachment is defective based on the inspection data input from the inspection equipment that inspects the attachment state after the attachment of the lenticular lens plate 120 and , when the attachment of the lenticular lens plate 120 is poor, a view overlap detection unit 164 that detects a sub-pixel in which a plurality of views, not one view, overlap, and a sub-pixel 164 in which the plurality of views overlap. It consists of a view pattern generating unit 165 that generates a view pattern by processing view data for , and a view pattern correction unit 166 that corrects the view pattern when a duplicate view occurs in the generated view pattern.

When the lenticular lens plate 120 is attached to the display panel 110 by means of an attachment device, a defective attachment is checked by means of an inspection device. In this case, a vision camera or the like may be used as the inspection equipment. The defect determination unit 162 determines the defect based on the result input from the inspection equipment. That is, if the lenticular lens plate 120 is not attached to the set position when it is attached to the display panel 110 , it is determined as defective. If the error in the attachment of the lenticular lens plate 120 is within an allowable range (error range that the human brain cannot recognize), it is determined not to be defective, and if it exceeds the allowable range, it is determined to be defective.

When the attachment of the lenticular lens plate 120 is poor, the view overlap detection unit 164 detects a sub-pixel that provides an overlapping image to the actual user's eyes from among a plurality of sub-pixels outputting an image.

Also, when a plurality of views overlap a sub-pixel, the view pattern generator 165 allocates an optimal view to each of the sub-pixels to have a view pattern that does not overlap the sub-pixel 164 . A new view pattern is created, and when a view overlapping the view pattern is generated by light incident from the adjacent lenticular lens 125 in the view pattern correction unit 166, the overlapped view is corrected so that the view is added to the view pattern. Modify the view pattern so that it does not overlap.

7 is a flowchart illustrating a method for correcting an attachment error of the lenticular lens plate 120 in a stereoscopic image display device according to the present invention, and FIGS. 8-10 are views illustrating a method of generating and correcting a view map for correcting an attachment error. A method for correcting an attachment error of the lenticular lens plate 120 of the present invention will be described in detail with reference to .

As shown in FIG. 7 , first, after attaching the lenticular lens plate 120 to the display panel 110, it is inspected by inspection equipment to determine whether an error has occurred in the attachment of the lenticular lens plate 120 ( S101, S102).

After the display panel 110 to which the lenticular lens plate 120 is attached is photographed with a camera such as a vision camera, the captured image is analyzed to check whether the lenticular lens plate 120 is attached to a set position, and the lenticular lens plate When 120 is attached to a position within an error range from the set position, it is determined as a good product rather than a defect, and a corresponding view map is generated by the lenticular lens plate 120 and displayed on the stereoscopic image display device (S103).

If the lenticular lens plate 120 is attached to a position exceeding an error range from a set position, it is determined as defective (S102).

Such poor adhesion may occur in various forms. For example, when the lenticular lens plate 120 is attached to the display panel 110, when an error occurs in the unit of the size of the sub-pixel (that is, when the error range is greater than or equal to the size of the sub-pixel), view data The above error cannot be corrected by the treatment of Therefore, in the present invention, this attachment error is applied only when it can be repaired by software.

When an attachment error occurs in the lenticular lens plate 120 , the view overlap detection unit 164 of the controller 160 detects a sub-pixel in which the view overlap occurs due to the attachment error ( S104 ). As described above, when an attachment error occurs in the lenticular lens plate 120 , it is not an excessive error, so the view does not overlap in the central region of the display panel 110 , but the lenticular lens 125 goes toward the outer region. ) and the characteristics of the light passing through it, the views overlap.

The view overlap detection unit 164 of the controller 160 detects a sub-pixel in which the view overlap occurs in the outer region of the display panel 110 . The sub-pixels in which such view overlap occurs are made by a reverse ray tracing method. In the ray tracing method, light is emitted from the display panel 110 and does not reach the user's left and right eyes through the lenticular lens plate 120, but outputs light rays from positions corresponding to the user's left and right eyes to output the lenticular lens. The position of the sub-pixel of the display panel 110 reaching through the plate 120 is tracked.

8A and 8B show a method of detecting a sub-pixel overlapping a view by a ray tracing method. At this time, FIG. 8A is a view showing that a light beam that has passed through the lenticular lens plate 120 by outputting a light beam from the actual eye position reaches the sub-pixel, and FIG. 8B is a view showing the light beam reaching the position in FIG. 8A. It is a schematic diagram At this time, in the drawings, the group corresponding to one lenticular lens 125 is limited to consist of 5 sub-pixels, but this is for convenience of explanation, and in the present invention, a group is 4 or less or 6 or more sub-pixels. is possible with

As shown in FIG. 8A , the display panel 110 is spaced apart from the lenticular lens plate 120 by a predetermined distance B (actually, a gap glass is formed between the display panel 110 and the lenticular lens plate 120). disposed between, but omitted for convenience of description), the lenticular lens plate 120 is spaced apart from the ray tracer corresponding to the user's eye by a predetermined distance (Z).

The light output from the ray tracer no. 1 spaced apart from the central area of the lenticular lens of the lenticular lens plate 125 by a predetermined distance L is incident on the lenticular lens of the lenticular lens plate 125 and then refracted to display panel 110 is input to the first sub-pixel of

As shown in FIG. 8B, the distance Tx from the center of the group corresponding to the lenticular lens of the lenticular lens plate 125 is the Snell's law sinθ = ksinφ (where k is the refractive index) by the following equation becomes equal to 1.

In the present invention, when an attachment error of the lenticular lens plate 120 occurs, the light is output from the ray tracer, and the user's eye, that is, the position of the sub-pixel corresponding to each view is calculated by Equation 1 above. .

Fig. 9a shows the position of the sub-pixel with respect to the user's eye calculated by the ray tracing method. As shown in FIG. 9A , a minute error occurred when the lenticular lens plate 125 was attached. However, when the position of the sub-pixel is calculated by Equation 1 above, 1, 2, 1, 2, in the central region of the display panel 110 , The light output from the ray tracers 3, 4 and 5 arrives at one sub-pixel each, in particular the corresponding sub-pixels 1, 2, 3, 4 and 5.

On the other hand, when a minute error occurs when attaching the lenticular lens plate 125 , when the position of the sub-pixel is calculated by Equation 1, in the outer region of the display panel 110, No. 1, 2, 3, 4, 5 A plurality of lights among the lights output from the ray tracer arrives at one sub-pixel. In the drawing, the light output from Ray Tracers No. 5 and No. 4 arrives in one sub-pixel, respectively, whereas the lights output from Ray Tracer Nos. 1, 2, and 3 all reach one sub-pixel. .

When the light output from the ray tracer reaches the sub-pixel, it means that the image displayed in the sub-pixel reaches the user's eye at a position corresponding to the ray tracer. Accordingly, in the central region of the display panel 110 , the light output from the ray tracers Nos. 1, 2, 3, 4 and 5 is each one sub-pixel, in particular, the corresponding sub-pixels Nos. 1, 2, 3, 4 and 5. - Reaching a pixel means that images displayed in a group of sub-pixels of a central area of the display panel 110 each reach a corresponding viewing diamond (time-in-time area). Accordingly, a normal view pattern is input to the central region of the display panel 110 so that a normal 3D image can be recognized.

On the other hand, in the outer region of the display panel 110, it is indicated in the plurality of sub-pixels that a plurality of lights among the lights output from the ray tracers Nos. 1, 2, 3, 4 and 5 reach one sub-pixel. This means that the image that becomes available reaches one eye. Accordingly, the user cannot recognize a complete 3D image because 3D crosstalk occurs in the user's eyes.

Referring again to FIG. 7 , after detecting sub-pixels with overlapping views as described above, a view pattern of sub-pixels with overlapping views is generated ( S105 ). Referring to FIG. 9A as an example, in the outer region of the display panel 110, the light output from the ray tracers Nos. 4 and 5 reaches sub-pixels No. 3 and 2, respectively, and the light trackers No. 1, 2, and 3 reach the sub-pixels respectively. The light output from the sub-pixel arrives at sub-pixel 1, and eventually, two views arrive at different viewing diamonds, and three views arrive at one viewing diamond.

Therefore, if this is made into a view pattern expressing the emmetropic region, as shown in FIG. 9B , no images are input to views 1 and 2 and images of sub-pixels 5 and 4 are displayed in views 3 and 4, respectively. They are input one by one, but three images (images of sub-pixels 1, 2, and 3) are input to view 5.

In the present invention, as described above, a corresponding image is selected for a view to which one image is input, only one image is selected from among images to which a plurality of images are input, and an image is arbitrarily assigned to a view to which an image is not input. By doing so, a view pattern in which an image is input one by one to all views 1-5 is formed.

9C is an enlarged view of sub-pixels outside the liquid crystal panel 110 on which three lights overlap. Lights output from the ray tracers 1, 2, and 3 calculated by Equation 1 are located at 0.9 and 0.7.0.4 points, respectively, from the center (0.5 point) of the sub-pixel. Accordingly, the light output from the ray tracer No. 3 is closest to the center of the sub-pixel. In the present invention, it is assumed that only the light closest to the center of the sub-pixel reaches the sub-pixel, and the image of sub-pixel 3 is assigned to view 5 of the view pattern. In addition, images #5 and #4, which are input images, are selected in #3 and #4 of the view pattern. Accordingly, as shown in FIG. 9D , no images are assigned to views 1 and 2 of the view pattern, whereas images of sub-pixels 5, 4, and 3 arrive in views 3, 4, and 5, respectively. .

A new image is arbitrarily assigned to views 1 and 2 of the view pattern to which the image does not reach. For example, as shown in FIG. 9E , images arriving from sub-pixel 2 and sub-pixel 1 may be assigned to views 1 and 2 of the view pattern, respectively. In this case, in the view pattern, images of sub-pixels 2, 1, 5, 4, and 3 arrive at views 1, 2, 3, 4 and 5, respectively. Also, view patterns 1, 2, 5, 4, and 3 may be formed by allocating images arriving from sub-pixel 1 and sub-pixel 2 to views 1 and 2, respectively.

Meanwhile, in the above description, only a configuration for generating a view pattern when one view overlaps is described, but a plurality of views may overlap. For example, if two images are superimposed on one view and three images are superimposed on the other view, an image close to the center is selected from each overlapped view and assigned to the corresponding view, and then the remaining 3 images are selected. View patterns can be created by randomly allocating views.

As described above, after the view pattern is generated, if a view overlapping the generated view pattern occurs, it is corrected (S106).

A nested view occurs in the created view pattern for the following reasons. If an error occurs when attaching the lenticular lens plate 125, the overlapping is only between sub-pixels corresponding to one lenticular lens 125 (that is, only within one group corresponding to the lenticular lens 125). Rather than occurring, overlap occurs through the lenticular lenses 125 adjacent to each other. For example, as shown in FIG. 9E , when a view pattern for a specific lenticular lens is generated as 2, 1, 5, 4, 3, but an image is input from sub-pixels of another group through an adjacent lenticular lens will occur

The input of an image from the adjacent lenticular lens 125 is due to a structural limitation of the lenticular lens 125 . If the lenticular lens 125 can be manufactured perfectly as designed, only the image output from the corresponding sub-pixel through the lenticular lens reaches the user's eye, but the perfect lenticular lens 125 can be realistically manufactured due to the tolerance of lens processing. Therefore, the image output from the sub-pixel through the adjacent lenticular lens 125 does not reach the view of the designed view pattern, but arrives at the view of the other adjacent view pattern.

10A is a diagram illustrating a view pattern generated corresponding to an outer region of the display panel 110 . As shown in Fig. 10A, the view pattern in this area is '2,1,3,4,5', '2,1,2,4,3', ... '1,3,5,1 ,4' and '1,3,5,2,4' are generated, and these view patterns are view patterns generated through the process as described above. However, in the view pattern, an image of another sub-pixel arrives through an adjacent lenticular lens, and a view pattern with overlapping views occurs. Due to the overlap of views, the user cannot fully recognize the 3D image. .

In the drawing, a view pattern superimposed on two views of '2,1,2,4,3' and '1,3,5,1,4' occurred. As such, when view overlap occurs in the view pattern, the view pattern must be modified by changing the nested view to another view.

10B is a diagram illustrating a method of modifying a view pattern of '2,1,2,4,3'. As shown in the figure, in order to modify a view pattern in which a view is superimposed, a modifiable view pattern is selected. In this case, it is preferable to select a view pattern adjacent to '2,1,2,4,3' as the modifiable view pattern, because when selecting an adjacent view pattern, 3D crosstalk can be minimized. because there is

View patterns adjacent to '2,1,2,4,3' are '2,1,3,4,5', and possible view patterns that can be placed using this view pattern are '2,1,3,4, 5', '3,4,5,2,1', '5,2,1,3,4', '1,3,4,5,2' and '4,5,2,1,3' with a total of 5 At this time, since the adjacent views are the left eye view and the right eye view, even if the arrangement position of the view pattern '2, 1, 3, 4, 5' is changed, the 5 views in the view pattern are sequentially arranged in the view pattern Therefore, a total of 5 view patterns are possible.

Comparing the five editable view patterns with the duplicate view pattern '2,1,2,4,3' and calculating the number that matches the view at the same position as '2,1,2,4,3' , '2,1,3,4,5' matches 3 views, '3,4,5,2,1', '5,2,1,3,4', '1,3,4, 5,2' has no matching views, and '4,5,2,1,3' matches 2 views. Therefore, the view pattern most similar to the overlapping view pattern '2,1,2,4,3' is '2,1,3,4,5', and the overlapping view pattern '2,1,2,4,3' ' is replaced with the view pattern '2,1,3,4,5'.

In addition, as shown in FIG. 10C , '1,3,5,1,4' including an overlapping view is also the most similar to '1,3,5,1,4' among view patterns that can be modified through the same method. Replace '1,3,5,1,4' by selecting the matching '1,3,5,2,4'.

Through the process as described above, the view map as shown in FIG. 10D is completed by replacing all the view patterns in which the views overlap with the optimal view patterns. At this time, although only the view map including the view pattern of a partial area of the outer area of the display panel 110 is shown in FIG. 10D , the view map with the optimal view pattern can be formed for other areas through the same process as above. .

Referring back to FIG. 7 , after the view pattern having the overlapped views is corrected as described above, a 3D image is implemented according to the modified view pattern.

As described above, in the stereoscopic image display device of the present invention, when an error occurs when attaching the lenticular lens plate 120 , a new view pattern is generated by detecting sub-pixels with overlapping views, and the view is superimposed on the view pattern. In this case, it is possible to always implement an optimal 3D image by replacing the overlapping view pattern with another view pattern.

11A is a diagram illustrating a 3D image when an attachment error occurs on a lenticular lens plate in a conventional stereoscopic image display device, and FIG. 11A is a diagram illustrating a 3D image in a stereoscopic image display device according to the present invention.

11A, in the conventional stereoscopic image display device, the central region has high luminance and the outer region has low luminance, so a luminance difference between the central region and the outer region is large, causing severe 3D crosstalk. In the stereoscopic image display device according to the present invention, the overall luminance is uniform, so that 3D crosstalk can be eliminated.

In the present invention described above, the stereoscopic image display device is described with a specific structure, but the present invention is not limited to this specific structure. Various modifications of the present invention or structures that can be easily devised based on the present invention should also be included in the scope of the present invention. Accordingly, the scope of the present invention should not be determined by the above detailed description, but should be determined by the appended claims.

110: display panel 120: lenticular lens plate
125: lenticular lens 126: gap glass

Claims (8)

display panel;
a lenticular lens plate positioned in front of the display panel and including a plurality of lenticular lenses; and
and a controller configured to detect sub-pixels in which a plurality of views overlap and correct an overlapping view pattern when an error occurs in the attachment of the display panel and the lenticular lens plate;
The controller is configured to detect sub-pixels to which a plurality of lights are input by a ray tracing method in order to detect sub-pixels overlapping a plurality of views. According to claim 1, wherein the control unit,
a failure determination unit for determining that the attachment of the lenticular lens plate is defective;
a view overlap detection unit for detecting sub-pixels in which a plurality of views overlap;
a view pattern generator for generating a view pattern by processing view data for sub-pixels in which the plurality of views overlap; and
A stereoscopic image display device including a view pattern correction unit that corrects a corresponding view pattern when a duplicate view occurs in the generated view pattern. The stereoscopic image display device of claim 2 , wherein the view pattern generator generates the view pattern by allocating a view closest to a center of a corresponding sub-pixel among the plurality of overlapping views as a new view. The method according to claim 2, wherein the view pattern modifying unit generates a plurality of view patterns that can be modified, selects a view pattern that has the same number of views as the view pattern to be modified from among the view patterns to be modified, and selects the view pattern to be modified. A stereoscopic image display device that changes to the selected view pattern. determining that the attachment of the lenticular lens plate is defective;
detecting sub-pixels in which the plurality of views overlap;
generating a view pattern by processing view data for sub-pixels in which the plurality of views overlap; and
If a duplicate view occurs in the created view pattern, including the step of modifying the view pattern,
The detecting of the sub-pixels in which the plurality of views overlap is the step of detecting the sub-pixels to which the plurality of lights are input by a ray tracing method. delete The method of claim 5 , wherein the generating of the view pattern comprises allocating a view closest to a center of a corresponding sub-pixel among overlapping views as a new view. The method of claim 5, wherein the step of modifying the view pattern comprises:
generating a plurality of modifiable view patterns; and
and selecting a view pattern that has the same number of views as the view pattern to be corrected from among the editable view patterns, and then changing the view pattern to be corrected to the selected view pattern.

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