Evaluation device for evaluating a display device

Abstract

An evaluation device for evaluating a display device, the evaluation device including a first camera configured to photograph a pattern of a viewpoint displayed by a display panel at coordinates arranged in a first direction, a second camera configured to photograph a reference image of the viewpoint displayed by the display panel at a target measurement coordinate, and a controller configured to generate a pattern measurement image from the pattern photographed by the first camera, determine the target measurement coordinate using a luminance ratio of the pattern measurement image, and evaluate crosstalk in at least one of the viewpoints using a luminance value of the reference image photographed at the target measurement coordinate by the second camera. Accordingly, it is possible to improve the accuracy of evaluation by determining in advance target measurement coordinates corresponding to left-eye and right-eye viewpoints and evaluating crosstalk of the display device at the determined target measurement coordinates.

Description

[0001] This application claims priority to Korean Patent Application No. 10-2024-0078143, filed on June 17, 2024, and Korean Patent Application No. 10-2024-0115866, filed on August 28, 2024, the entire disclosure of which is incorporated herein by reference. Technical Field

[0002] This utility model relates to an evaluation device. Background Technology

[0003] With the development of information technology, the importance of display devices as the connection medium between users and information is becoming increasingly apparent. In response, the use of display devices such as liquid crystal displays (LCDs) and organic light-emitting diode (OLEDs) is increasing.

[0004] A stereoscopic image display device is a display device that can stimulate the viewer's visual senses in the same way as the real object and can provide physical factors that allow the viewer to perceive the object in three dimensions. For example, a stereoscopic image display device can provide different images to the viewer's left and right eyes, so that the viewer can view the stereoscopic image through binocular parallax between the left and right eyes.

[0005] In stereoscopic image display devices, image quality can be evaluated using crosstalk. Crosstalk refers to the phenomenon where each viewpoint overlaps with its neighboring viewpoints. However, in conventional methods of evaluating crosstalk, it can be assessed based on the brightness measured from the center point for each angle. Utility Model Content

[0006] The purpose of this invention is to provide an evaluation device with improved accuracy and an evaluation method for a display device using the evaluation device. For example, the evaluation device can improve the accuracy of the evaluation by determining the target measurement coordinates using the brightness ratio of a pattern measurement image and evaluating the crosstalk at the determined target measurement coordinates.

[0007] According to an embodiment of the present invention, an evaluation device for evaluating an image of a viewpoint displayed via a display panel includes: a first camera configured to capture a pattern of the viewpoint displayed by the display panel at coordinates arranged along a first direction; a second camera configured to capture a reference image of the viewpoint displayed by the display panel at a target measurement coordinate; and a controller configured to generate a pattern measurement image based on the pattern captured by the first camera, determine the target measurement coordinate using the brightness ratio of the pattern measurement image, and evaluate crosstalk of at least one viewpoint using the brightness value of the reference image captured by the second camera at the target measurement coordinate.

[0008] The evaluation device may further include a first clamp and a second clamp, the first clamp being configured to support a first camera and a second camera, and the second clamp being configured to support a display device, wherein the first camera is configured to move relative to the second clamp in a first direction and in a direction opposite to the first direction, and the second camera is configured to move relative to the second clamp in a first direction, in a direction opposite to the first direction, in a third direction perpendicular to the first direction, and in a direction opposite to the third direction.

[0009] The first clamp can be configured to move the first camera and the second camera in a first direction, a direction opposite to the first direction, a third direction, and a direction opposite to the third direction.

[0010] The second clamp can be configured to move the display device in a first direction and in a direction opposite to the first direction.

[0011] The pattern can be displayed as an overlay of a first line and a second line, the first line being spaced apart from the center point of a reference line in a direction opposite to the first direction, and the second line being spaced apart from the center point in the first direction, wherein the reference line extends on the display panel in the first direction.

[0012] The pattern may include a first pattern and a second pattern displayed as superimposed on the first line, and a third pattern and a fourth pattern displayed as superimposed on the second line. The first pattern and the second pattern may face each other and a reference line is between the first pattern and the second pattern. The third pattern and the fourth pattern may face each other and a reference line is between the third pattern and the fourth pattern.

[0013] The patterns can be positioned adjacent to the reference line, the first and third patterns can be spaced apart from the reference line in a second direction intersecting the first direction, and the second and fourth patterns can be spaced apart from the reference line in a direction opposite to the second direction.

[0014] The first line and the second line can extend from the first point corresponding to 1 / 10 and the second point corresponding to 9 / 10 when the reference line is divided into ten equal parts along the first direction, respectively, in the second direction and in the direction opposite to the second direction. The pattern measurement image can include a first pattern measurement image and a second pattern measurement image generated by the first pattern and the second pattern, as well as a third pattern measurement image and a fourth pattern measurement image generated by the third pattern and the fourth pattern. The controller can determine a first measurement coordinate where the brightness ratio of the second pattern measurement image to the first pattern measurement image is a low value, a second measurement coordinate where the brightness ratio of the fourth pattern measurement image to the third pattern measurement image is a low value, a third measurement coordinate where the brightness ratio of the first pattern measurement image to the second pattern measurement image is a low value, and a fourth measurement coordinate where the brightness ratio of the third pattern measurement image to the fourth pattern measurement image is a low value.

[0015] The controller can determine the point where the first virtual line extending from the first point to the third measurement coordinate overlaps with the second virtual line extending from the second point to the fourth measurement coordinate as the target measurement coordinate of the first viewpoint in the viewpoint.

[0016] The controller can determine the point where the third virtual line extending from the first point to the first measurement coordinate overlaps with the fourth virtual line extending from the second point to the second measurement coordinate as the target measurement coordinate of the second viewpoint in the viewpoint.

[0017] The display panel may include pixels, and the pixels may include a first pixel group and a second pixel group configured to display a stereoscopic image, and a reference image may be displayed through the first pixel group and the second pixel group.

[0018] The reference image may include a first reference image corresponding to a first viewpoint in the viewpoint, a second reference image corresponding to a second viewpoint in the viewpoint, and a third reference image that is jointly corresponding to the first viewpoint and the second viewpoint. The first reference image may be configured to display white grayscale through a first pixel group and black grayscale through a second pixel group. The second reference image may be configured to display black grayscale through a first pixel group and white grayscale through a second pixel group. The third reference image may be configured to display black grayscale through a first pixel group and a second pixel group.

[0019] The controller can calculate a first corrected brightness value by subtracting a third brightness value measured by a third reference image from a first brightness value measured by a first reference image, and calculate a second corrected brightness value by subtracting a third brightness value measured by a third reference image from a second brightness value measured by a second reference image, and the controller can use the ratio of the second corrected brightness value to the first corrected brightness value to evaluate the crosstalk of the first viewpoint.

[0020] The controller can be configured to evaluate the uniformity of at least one viewpoint.

[0021] According to an embodiment of the present invention, an evaluation device for evaluating an image of a viewpoint displayed via a display panel includes: a camera having a first mode and a second mode, the first mode being configured to capture a pattern of the viewpoint displayed by the display panel at coordinates arranged along a first direction, and the second mode being configured to capture a reference image of the viewpoint displayed by the display panel at a target measurement coordinate; and a controller configured to generate a pattern measurement image based on the pattern captured by the camera in the first mode, determine the target measurement coordinate using the brightness ratio of the pattern measurement image, and evaluate the crosstalk of at least one viewpoint using the brightness value of the reference image captured by the camera at the target measurement coordinate in the second mode.

[0022] According to an embodiment of the present invention, a method for evaluating a display device including a display panel is provided. The method includes: displaying a pattern of viewpoints through the display panel; capturing the pattern at coordinates set along a first direction; determining target measurement coordinates of at least one viewpoint based on the pattern; outputting a reference image of the viewpoints; capturing the reference image at the target measurement coordinates; and evaluating crosstalk of at least one viewpoint using the brightness value of the reference image.

[0023] The steps for determining the target measurement coordinates may include: generating a pattern measurement image based on the pattern and using the brightness ratio of the pattern measurement image to determine the measurement coordinates; and using a virtual line extending from the pattern to the measurement coordinates to determine the target measurement coordinates.

[0024] At the target measurement coordinates, the crosstalk of at least one viewpoint can have a minimum value.

[0025] The step of capturing a pattern can be performed using a first camera, and the step of capturing a reference image can be performed using a second camera.

[0026] The step of determining the target measurement coordinates of at least one viewpoint based on a pattern may include using the brightness ratio of the pattern-measured image to determine the number of target measurement coordinates to be determined.

[0027] Therefore, the accuracy of the evaluation can be improved by pre-determining the target measurement coordinates corresponding to the left and right eye viewpoints and evaluating the crosstalk of the display device at the determined target measurement coordinates. Attached Figure Description

[0028] The illustrative, non-limiting embodiments will become clearer from the following detailed description taken in conjunction with the accompanying drawings.

[0029] Figure 1 This is a view showing a display device according to an embodiment of the present invention.

[0030] Figure 2 This is a view showing an evaluation device according to an embodiment of the present invention.

[0031] Figure 3 It is shown Figure 1 A plan view of an embodiment of the display device.

[0032] Figure 4 It is shown Figure 2 A block diagram of an embodiment of the controller of the evaluation device.

[0033] Figure 5 This is a flowchart illustrating a method for evaluating a display device according to an embodiment of the present invention.

[0034] Figure 6 It is shown in Figure 3 A view of an example of a pattern output on a display device.

[0035] Figure 7 It is shown that Figure 2 An example view of a pattern captured by the first camera of the evaluation device.

[0036] Figure 8 It is shown that Figure 2 An example view of the evaluation device's controller determining measurement coordinates from a patterned measurement image.

[0037] Figure 9 It is shown that Figure 2 The controller of the evaluation device determines the target measurement coordinates in an example view.

[0038] Figure 10 It is shown that Figure 2 An example view of a reference image captured by the second camera of the evaluation device.

[0039] Figure 11 It is shown in Figure 10 An example view of a reference image taken in the image.

[0040] Figure 12 It is shown by Figure 2 A view of an example of crosstalk evaluated by an evaluation device.

[0041] Figure 13 It shows the use Figure 12 A view of an example of uniformity in crosstalk analysis. Detailed Implementation

[0042] In the following description, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only the parts necessary for understanding the operation according to the present invention will be described, and the description of other parts may be omitted or simplified. Furthermore, the present invention is not limited to the exemplary embodiments, but may be embodied in other forms. Rather, embodiments are provided so that the present invention will be thorough and complete, and will fully convey the present invention to those skilled in the art.

[0043] Throughout this specification, it will be understood that when an element is referred to as being “joined” or “connected” to another element, it can be directly joined to or directly connected to said other element, or an intermediary element may be present therein. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. Throughout this specification, unless expressly stated otherwise, the word “comprising” and its variations will be understood to imply the inclusion of stated elements but not the exclusion of any other elements. “At least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” can be interpreted as each of X, Y, and Z or a combination of two or more of X, Y, and Z (e.g., XYZ, XY, YZ, and XZ). As used herein, “and / or” includes one or more combinations of the corresponding components.

[0044] It will be understood that although the terms “first,” “second,” “third,” etc., may be used herein to describe various elements, these elements are not limited by these terms. These terms are used to distinguish elements. Therefore, the first element described herein may also be referred to as the second or third element without departing from the spirit and scope of this utility model.

[0045] This disclosure provides a display device capable of detecting and analyzing crosstalk that may cause mixed images at each viewpoint. In an evaluation device for evaluating images of a display device at a display viewpoint according to an embodiment of the present invention, the accuracy of the evaluation can be improved by pre-determining target measurement coordinates corresponding to the left-eye and right-eye viewpoints, and crosstalk of the display device at the determined target measurement coordinates can be evaluated. Furthermore, the evaluation device can reduce the evaluation time for crosstalk by taking multiple measurements of brightness values ​​at the target measurement coordinates.

[0046] Figure 1 This is a view showing a display device according to an embodiment of the present invention.

[0047] Reference Figure 1 The display device DD may include a display panel DP and a lens array LSA.

[0048] The display panel DP may include pixels PXL configured to emit light to display an image. In an embodiment, each of the pixels PXL may output light of a first color (e.g., red), a second color (e.g., green), or a third color (e.g., blue). However, this is merely an example, and the colors of light emitted from the pixels PXL are not limited to this, and various colors of light may be output for full-color implementation.

[0049] Display panel DP can include organic light-emitting display panels, liquid crystal display panels, or quantum dot display panels. Display panel DP can include other types of panels, and embodiments are not particularly limited to the type of display panel DP.

[0050] A lens array (LSA) can be mounted on a display panel (DP). The LSA can include lenses (LS). Lenses (LS) can refract light incident from pixels (PXL). For example, the LSA can be implemented as a biconvex lens array or a microlens array.

[0051] When a lens array (LSA) is formed on a display panel (DP), a series of pixels (PXL) can correspond to each lens (LS), and light from each pixel (PXL) can be refracted by the lens (LS) to travel in a specific direction. As an example, the display panel (DP) can display a left-eye image and a right-eye image at positions corresponding to each of the lenses (LS), respectively. In this case, the lens (LS) can focus the left-eye image and the right-eye image displayed on the display panel (DP), allowing the user's left eye (Eye_L) and right eye (Eye_R) to perceive the left-eye image and the right-eye image separately.

[0052] For example, when the lens LS can be configured to be superimposed on the first pixel PXL1 and the second pixel PXL2, the first pixel PXL1 can display the left-eye image, and the second pixel PXL2 can display the right-eye image. The left-eye image displayed by the first pixel PXL1 can be viewed by the user's left eye (Eye_L) through the lens LS, and the right-eye image displayed by the second pixel PXL2 can be viewed by the user's right eye (Eye_R) through the lens LS. Therefore, due to the binocular parallax of the left-eye and right-eye images, the user can perceive the image viewed from the display device DD as a three-dimensional (3D) image.

[0053] According to embodiments, a light field display can be a three-dimensional (3D) display device that can use a flat panel display and optical elements (e.g., a lens array LSA) to form a light field representing the vector distribution (intensity, direction) of light in space, which can realize stereoscopic images. A light field display can be a display technology that can be used in various ways by fusing with augmented reality (AR) technology, in which the display technology allows perception of the depth and side surfaces of objects, which can realize improved stereoscopic images. For example, stereoscopic images can have a more natural appearance.

[0054] Light fields can be generated in various ways. For example, they can be generated by using multiple projectors to generate light fields in multiple directions, by using diffraction gratings to control the direction of light, by using two or more panels to control the direction and intensity (brightness) of light according to the combination of each pixel, by using pinholes or barriers to control the direction of light, or by using a lens array LSA to control the direction of light refraction.

[0055] Meanwhile, the display device DD can be applied to any electronic device, such as smartphones, televisions, tablet PCs, mobile phones, video phones, e-book readers, desktop PCs, laptop PCs, netbooks, workstations, servers, personal digital assistants (PDAs), portable multimedia players (PMPs), MP3 players, medical devices, cameras, or wearable devices.

[0056] Figure 2 This is a view showing an evaluation device according to an embodiment of the present invention.

[0057] Reference Figure 2 The evaluation device ED according to an embodiment of the present invention may include a first camera 210, a second camera 220, a first clamp 310 and a second clamp 320.

[0058] The evaluation device ED can evaluate crosstalk caused by the display device DD. The evaluation device ED can evaluate the crosstalk of the display panel DP extending along a first direction DR1 and a second direction DR2 intersecting the first direction DR1 (see...). Figure 1 A display device DD that displays an image of a viewpoint.

[0059] The first direction DR1 and the second direction DR2 can be set to be perpendicular to each other and can form a plane. The third direction DR3 can be set to be perpendicular to the plane formed by the first direction DR1 and the second direction DR2.

[0060] The viewpoint of the display device DD can be preset to the position for viewing the image displayed on the display panel DP. For example, the viewpoint can be set to the coordinates corresponding to the right-eye and left-eye viewpoints of the user viewing the image on the display panel DP.

[0061] The first camera 210 can capture images of the first pattern PT1, the second pattern PT2, the third pattern PR3, and the fourth pattern PT4 displayed on the display panel DP (see...). Figure 6 The image is displayed on the display panel DP. According to an embodiment, the first camera 210 may be a machine vision camera, but is not necessarily limited to this. For example, a camera capable of recognizing patterns displayed on the display panel DP can be used.

[0062] The first camera 210 can be positioned above the display device DD. The first camera 210 can move in a first direction DR1 and in a direction opposite to DR1. The first camera 210 can capture images of first patterns PT1 to fourth patterns PT4 at coordinates along the first direction DR1. The first camera 210 can capture images of first patterns PT1 to fourth patterns PT4 at coordinates along the first direction DR1 by stopping at a coordinate along the first direction DR1, or by moving along a coordinate along the first direction DR1 while capturing images of first patterns PT1 to fourth patterns PT4 at coordinates along the first direction DR1.

[0063] The second camera 220 can capture a reference image displayed on the display panel DP. According to embodiments, the second camera 220 can be a spectroradiometer or a multispectral camera, but is not necessarily limited to these. For example, the second camera 220 can be a camera configured to measure the brightness of an image displayed on the display panel DP.

[0064] The second camera 220 can be positioned above the display device DD. The second camera 220 can be positioned adjacent to the first camera 210. The second camera 220 can move in a first direction DR1 and in a direction opposite to DR1. Additionally, the second camera 220 can move in a third direction DR3 and in a direction opposite to DR3. Therefore, the second camera 220 can move to the target measurement coordinates and capture reference images. The second camera 220 can capture reference images while stopping at each of the target measurement coordinates, or it can capture reference images while moving between the various target measurement coordinates.

[0065] The first camera 210 can be mounted on a track and connected to a stepper motor. For example, the stepper motor can move the first camera 210 along the track in a first direction DR1 and in a direction opposite to the first direction DR1. Those skilled in the art will understand that the first camera 210 can be configured differently for movement. Therefore, the position of the first camera 210 can be changed.

[0066] The second camera 220 can be mounted to move along two dimensions. For example, the second camera 220 can move in a first direction DR1 and in a direction opposite to DR1, and in a third direction DR3 and in a direction opposite to DR3. For example, the second camera 220 can be mounted on a threaded stepper motor, which can move the second camera 220 in the third direction DR3 and in a direction opposite to DR3. The threaded stepper motor can be mounted on a track and can be connected to a second stepper motor, which can move the second camera 220 and the threaded stepper motor in the first direction DR1 and in a direction opposite to DR1. Those skilled in the art will understand that the second camera 220 can be configured differently for movement. Therefore, the position of the second camera 220 can be changed.

[0067] The first clamp 310 can support the first camera 210 and the second camera 220. The first clamp 310 can be connected to the first camera 210 and the second camera 220. For example, the first camera 210 and the second camera 220 can be mounted at the end of the first clamp 310 and fixed at a position spaced apart from the display device DD along the third direction DR3.

[0068] The first clamp 310 can move the first camera 210 and the second camera 220 in a first direction DR1, in a direction opposite to the first direction DR1, in a second direction DR2, and in a direction opposite to the second direction DR2. Additionally, the first clamp 310 can move the first camera 210 and the second camera 220 in a third direction DR3 and in a direction opposite to the third direction DR3. Therefore, the positions of the first camera 210 and the second camera 220 can be changed. For example, the first clamp 310 can move the first camera 210 along coordinates arranged in the first direction DR1. The first clamp 310 can move the second camera 220 to the target measurement coordinates.

[0069] The first clamp 310 may be connected to one or more stepper motors for moving the clamp. For example, the stepper motors may move the first clamp 310, the first camera 210, and the second camera 220 in a first direction DR1, a direction opposite to the first direction DR1, a second direction DR2, and a direction opposite to the second direction DR2. Additionally, the stepper motors may move the first clamp 310, the first camera 210, and the second camera 220 in a third direction DR3 and a direction opposite to the third direction DR3. Those skilled in the art will understand that the first clamp 310 may be configured differently for movement. Therefore, the positions of the first camera 210 and the second camera 220 mounted on the first clamp 310 can be changed.

[0070] The second clamp 320 can support the display device DD. The second clamp 320 can mount the display device DD on the second clamp 320 so that it faces the first camera 210 and the second camera 220.

[0071] The second clamp 320 can move the display device DD. For example, the second clamp 320 can move the display device DD in the first direction DR1 and in the direction opposite to the first direction DR1. For example, the first camera 210 can have a fixed position, and the display device DD can be moved by the second clamp 320 in the first direction DR1 and in the direction opposite to the first direction DR1. Therefore, the first camera 210 can capture the first pattern PT1 to the fourth pattern PT4 at coordinates arranged along the first direction DR1.

[0072] The second clamp 320 can move the display device DD in the second direction DR2 and in the direction opposite to the second direction DR2. The second clamp 320 can also move the display device DD in the third direction DR3 and in the direction opposite to the third direction DR3.

[0073] As described herein, the positions of the first camera 210, the second camera 220, and the second clamp 320 may move differently relative to each other. In some examples, the second clamp 320 may have a fixed position. In some examples, the first camera 210 and the second camera 220 may have fixed positions.

[0074] The first camera 210 and the second camera 220 can be implemented as the same camera with multiple modes. For example, the camera can have a first mode for capturing a pattern and a second mode for capturing a reference image. In the first mode, the camera can move relative to the second clamp 320 in a first direction DR1 and in a direction opposite to the first direction DR1. In the second mode, the camera can move relative to the second clamp 320 in the first direction DR1 and in a direction opposite to the first direction DR1, as well as in a third direction DR3 and in a direction opposite to the third direction DR3.

[0075] Figure 3 It is shown Figure 1 A plan view of an embodiment of the display device.

[0076] Reference Figure 3 The display device DD may include a substrate SUB and pixels PXL.

[0077] The base SUB may extend along a first direction DR1 and a second direction DR2 intersecting the first direction DR1. The base SUB may include a display area DA and a non-display area NDA. The non-display area NDA may be disposed around at least a portion of the display area DA. The display area DA may be the area in which pixels PXL are disposed to display an image. The non-display area NDA may be the area at the edge of the display area DA.

[0078] Pixel PXL can be disposed in the display area DA of the substrate SUB. Pixel PXL can be disposed in a matrix form on a first direction DR1 and a second direction DR2 intersecting the first direction DR1. However, the embodiment is not limited to this. For example, pixel PXL can be disposed in a sawtooth shape on the first direction DR1 and the second direction DR2. For example, pixel PXL can be arranged in other shapes.

[0079] Pixel PXL can display preset patterns and reference images. Pixel PXL can include pixels from a first pixel group PXG1 and pixels from a second pixel group PXG2. Here, the first pixel group PXG1 can be arranged in odd-numbered pixel columns along the first direction DR1, and the second pixel group PXG2 can be arranged in even-numbered pixel columns along the first direction DR1. For example, the first pixel PXL1 included in the first pixel group PXG1 can display a left-eye image. The second pixel PXL2 included in the second pixel group PXG2 can display a right-eye image. The left-eye image of the first pixel PXL1 can be viewed by the user's left eye, and the right-eye image of the second pixel PXL2 can be viewed by the user's right eye.

[0080] Components for controlling pixel PXL can be located in the non-display area NDA of the substrate SUB. For example, interconnects connected to pixel PXL and pads (or "solder pads") connected to the interconnects can be located in the non-display area NDA. The pads can be electrically connected to pixel PXL via the interconnects. For example, voltages and signals for operating pixel PXL can be provided via the interconnects and pads.

[0081] Figure 4 It is shown Figure 2 A block diagram of an embodiment of the controller of the evaluation device.

[0082] Reference Figure 2 and Figure 4 The evaluation device ED may include a controller 230. The controller 230 can determine the target measurement coordinates CP for at least one viewpoint and can evaluate crosstalk generated by the display device DD. The controller 230 may include an image processor 231, a position determination unit 232, a first evaluation unit 233, and a second evaluation unit 234.

[0083] The controller 230 can receive first image data ID1 from the first camera 210. First image data ID1 can be image data captured by the first camera 210. First image data ID1 can be data from the first camera 210 at coordinates IP1 to IPn (see [reference needed]) arranged along the first direction DR1. Figure 7 Image data taken at (location).

[0084] Image processor 231 can generate pattern measurement images (MPIs) using the first image data ID1. Image processor 231 can generate pattern measurement images (MPIs) in real time using the first image data ID1. Image processor 231 can generate pattern measurement images (MPIs) corresponding to each of the coordinates arranged in the first direction DR1. For example, image processor 231 can generate pattern measurement images (MPIs) corresponding to the first coordinates IP1 to the nth coordinates IPn (see...). Figure 7 Each of the four corresponding patterns in the image is measured in MPI. The image processor 231 can measure the image from the images captured by the image processor 231 on the display panel DP (see image processor 231). Figure 7 The first point P1 (see) Figure 7 The first pattern PT1 shown at (see) Figure 6 ) and the second pattern PT2 (see Figure 6 The first image data ID1 obtained generates the first pattern measurement image MPI1 (see...). Figure 8 ) and the second pattern measurement image MPI2 (see Figure 8 Image processor 231 can capture images from a second point P2 on the display panel DP (see image DP). Figure 7 The third pattern PT3 shown at (see) Figure 6 ) and the fourth pattern PT4 (see Figure 6 The first image data ID1 obtained generates the third pattern measurement image MPI3 (see...). Figure 8 ) and the fourth pattern measurement image MPI4 (see Figure 8 ).

[0085] The position determination unit 232 can determine the measurement coordinates from the first coordinate IP1 to the nth coordinate IPn. The position determination unit 232 can use the brightness ratio of the pattern measurement image MPI to determine the measurement coordinates from the first coordinate IP1 to the nth coordinate IPn. For example, the position determination unit 232 can determine the second pattern measurement image MPI2 (see...) Figure 8 ) and the first pattern measurement image MPI1 (see Figure 8 The first measurement coordinate has a low brightness ratio. For example, the position determination unit 232 can determine its location in the second pattern measurement image MPI2 (see Figure 8 ) and the first pattern measurement image MPI1 (see Figure 8The first measurement coordinate where the brightness ratio is minimized. Here, the "minimized" ratio, or ratio with a low value, can be a ratio with a value within approximately 5% or approximately 10% of the determined brightness ratio. The position determination unit 232 can determine its location on the fourth pattern measurement image MPI4 (see Figure 8 ) and the third pattern measurement image MPI3 (see Figure 8 The second measurement coordinate is where the brightness ratio of the first pattern measurement image MPI1 is minimized. The position determination unit 232 can determine its location in the first pattern measurement image MPI1 (see Figure 8 ) and the second pattern measurement image MPI2 (see Figure 8 The brightness ratio of the third measurement coordinate is minimized. The position determination unit 232 can determine the location of the third pattern measurement image MPI3 (see Figure 8 ) and the fourth pattern measurement image MPI4 (see Figure 8 The brightness ratio of the fourth measurement coordinate is minimized.

[0086] The position determination unit 232 can determine a point as the target measurement coordinate CP. This point can be a point where virtual lines extending from the pattern to the measurement coordinates overlap. For example, the position determination unit 232 can determine the point where a first virtual line extending from a first point P1 to a third measurement coordinate overlaps with a second virtual line extending from a second point P2 to a fourth measurement coordinate as the target measurement coordinate CP of a first point (e.g., the left eye viewpoint). The position determination unit 232 can determine the point where a third virtual line extending from a first point P1 to the first measurement coordinate overlaps with a fourth virtual line extending from a second point P2 to the second measurement coordinate as the target measurement coordinate CP of a second point (e.g., the right eye viewpoint).

[0087] The target measurement coordinates CP determined by the position determination unit 232 can be coordinates that have a low value for the brightness ratio of each viewpoint. For example, a low value can be a value close to the minimum value, such as the minimum value being within about 1%, about 5%, or about 10% of the viewpoint. These target measurement coordinates CP can be transmitted to the first clamp 310 to control the operation of the first clamp 310. Therefore, the second camera 220 can be moved to the target measurement coordinates CP via the first clamp 310.

[0088] The controller 230 can receive second image data ID2 from the second camera 220. Second image data ID2 can be image data (or brightness data) captured by the second camera 220 at the target measurement coordinate CP.

[0089] The first evaluation unit 233 can use the second image data ID2 to generate first data DATA1 as the first output result OUTPUT1. For example, the first evaluation unit 233 can output the first data DATA1 in a two-dimensional (2D) format, which can be obtained by evaluating crosstalk at a certain viewpoint using the brightness value of a reference image. However, the first data DATA1 is not limited to this, and the first data DATA1 can quantize crosstalk in another way.

[0090] According to an embodiment, the first evaluation unit 233 can generate first data DATA1 using the brightness values ​​of a first reference image to a third reference image captured by the second camera 220. For example, the first evaluation unit 233 can calculate a first corrected brightness value by subtracting a third brightness value measured by the third reference image from a first brightness value measured by the first reference image. The first evaluation unit 233 can calculate a second corrected brightness value by subtracting a third brightness value measured by the third reference image from a second brightness value measured by the second reference image. The first evaluation unit 233 can evaluate viewpoint crosstalk using the ratio of the second corrected brightness value to the first corrected brightness value. Specifically, when evaluating crosstalk of the left-eye viewpoint, the first reference image can be an image representing a left-eye image with reference brightness. The second reference image can be an image representing a right-eye image with reference brightness. The third reference image can be an image representing an image used for correction. On the other hand, when evaluating crosstalk of the right-eye viewpoint, the first reference image can be an image representing a right-eye image with reference brightness. The second reference image can be an image representing a left-eye image with reference brightness. The third reference image can be an image representing an image used for correction.

[0091] The second evaluation unit 234 can use the first data DATA1 to generate a second data DATA2 as the second output result OUTPUT2. For example, the second evaluation unit 234 can analyze crosstalk and output the second data DATA2 in 2D format, which can be obtained by evaluating the uniformity of crosstalk at the viewpoint. The second data DATA2 can be data obtained by evaluating uniformity using at least one of the average, maximum, minimum, and relative standard deviation (RSD) values ​​of crosstalk. However, the second data DATA2 is not limited to this, as long as uniformity can be quantified.

[0092] Figure 5 This is a flowchart illustrating a method for evaluating a display device according to an embodiment of the present invention.

[0093] Reference Figure 2 and Figure 5 According to the embodiments, the evaluation can include the display panel DP (see Figure 1The display device evaluation method of the display device DD may include an operation S1010 of outputting a pattern on the display panel DP, an operation S1020 of taking a picture of the pattern at coordinates set along the first direction DR1 using a first camera 210, an operation S1030 of generating a pattern measurement image based on the pattern and determining measurement coordinates using the brightness ratio of the pattern measurement image, an operation S1040 of determining target measurement coordinates using a virtual line extending from the pattern to the measurement coordinates, an operation S1050 of outputting a reference image of a viewpoint on the display panel DP, an operation S1060 of taking a reference image at the target measurement coordinates using a second camera 220, and an operation S1070 of evaluating crosstalk at at least one viewpoint using the brightness value of the taken reference image.

[0094] When the evaluation device includes a camera configured to capture patterns and capture reference images, in operation S1030, if the camera's previous mode was set to capture reference images, the camera's mode can be changed to capture patterns.

[0095] Figure 6 It is shown in Figure 3 A view of an example of a pattern output on a display device.

[0096] Reference Figure 5 and Figure 6 In operation S1010, a viewpoint pattern can be output as a display image on the display panel DP. The display panel DP has pixels PXL (see...). Figure 3 It can output the first pattern PT1 to the fourth pattern PT4.

[0097] The first pattern PT1 and the second pattern PT2 can be displayed superimposed on the first line LN1, wherein the first line LN1 can be spaced apart from the center point P0 of the reference line BLN in a direction opposite to the first direction DR1. The third pattern PT3 and the fourth pattern PT4 can be displayed superimposed on the second line LN2, wherein the second line LN2 can be spaced apart from the center point P0 of the reference line BLN in the first direction DR1, wherein the reference line BLN extends on the display panel DP in the first direction DR1. The first pattern PT1 to the fourth pattern PT4 can be displayed adjacent to the reference line BLN.

[0098] For example, the first line LN1 can extend from a first point P1 corresponding to 1 / 10 of the case where the reference line BLN is divided into ten equal parts in the first direction DR1, in the second direction DR2 and in a direction opposite to the second direction DR2. The second line LN2 can extend from a second point P2 corresponding to 9 / 10 of the case where the reference line BLN is divided into ten equal parts in the first direction DR1, in the second direction DR2 and in a direction opposite to the second direction DR2. However, the embodiment is not limited to this. For example, the first line LN1 and the second line LN2 can extend from points corresponding to 1 / 8 and 7 / 8 of the case where the reference line BLN is divided into eight equal parts in the first direction DR1, respectively, in the second direction DR2 and in a direction opposite to the second direction DR2.

[0099] The first pattern PT1 and the second pattern PT2 can be displayed superimposed on a first line LN1 extending from the first point P1. The first pattern PT1 and the second pattern PT2 can face each other, and a reference line BLN is placed between the first pattern PT1 and the second pattern PT2. The first pattern PT1 can be spaced apart from the reference line BLN in a second direction DR2, and the second pattern PT2 can be spaced apart from the reference line BLN in a direction opposite to the second direction DR2. For example, the first pattern PT1 can be a right-eye pattern for a right-eye viewpoint, and the second pattern PT2 can be a left-eye pattern for a left-eye viewpoint.

[0100] The third pattern PT3 and the fourth pattern PT4 can be displayed superimposed on the second line LN2 extending from the second point P2. The third pattern PT3 and the fourth pattern PT4 can face each other, with the reference line BLN positioned between them. The third pattern PT3 can be spaced apart from the reference line BLN in the second direction DR2, and the fourth pattern PT4 can be spaced apart from the reference line BLN in the opposite direction to the second direction DR2. For example, the third pattern PT3 can be a right-eye pattern for a right-eye viewpoint, and the fourth pattern PT4 can be a left-eye pattern for a left-eye viewpoint.

[0101] Figure 7 It is shown that Figure 2 An example view of a pattern captured by the first camera of the evaluation device.

[0102] Reference Figure 2 , Figure 5 and Figure 7 In operation S1020, the first camera 210 can be used to capture a pattern at coordinates arranged along the first direction DR1.

[0103] The first coordinates IP1 to the nth coordinates IPn can be preset patterns to be captured. Each of the first coordinates IP1 to the nth coordinates IPn can be arranged on the first direction DR1 and preset at a position spaced a certain distance from the display panel DP along the third direction DR3. For example, the first coordinates IP1 to the bth coordinates IPb can be positioned relative to the center point P0 of the display panel DP in the opposite direction to the first direction DR1. Each of the first coordinates IP1 to the bth coordinates IPb can be positioned to the left of the center point P0 and can correspond to the left eye viewpoint. The cth coordinates IPc to the nth coordinates IPn can be positioned relative to the center point P0 of the display panel DP on the first direction DR1. Each of the cth coordinates IPc to the nth coordinates IPn can be positioned to the right of the center point P0 and can correspond to the right eye viewpoint.

[0104] The first camera 210 can move relative to the display panel DP. The first camera 210 can move along the first direction DR1 to each of the first coordinates IP1 to the nth coordinate IPn. The first camera 210 can capture the first pattern PT1 to the fourth pattern PT4 (see...) on the display panel DP at the first coordinates IP1 to the nth coordinate IPn. Figure 6 ).

[0105] Reference Figure 6 and Figure 7 The first camera 210 can capture a first pattern PT1 and a second pattern PT2 of a first point P1 at a first coordinate IP1. The first camera 210 can also capture a third pattern PT3 and a fourth pattern PT4 of a second point P2 at the first coordinate IP1. The first camera 210 can move along a first direction DR1 to capture the first pattern PT1 and the second pattern PT2 of the first point P1 at a second coordinate IP2. The first camera 210 can also capture the third pattern PT3 and the fourth pattern PT4 of the second point P2 at the second coordinate IP2. Subsequently, the first camera 210 can move along the first direction DR1 to capture the first pattern PT1 and the second pattern PT2 of the first point P1, as well as the third pattern PT3 and the fourth pattern PT4 of the second point P2, at each of the coordinates from the a-th to the n-th coordinate IPn.

[0106] Figure 8 It is shown that Figure 2 An example view of the evaluation device's controller determining measurement coordinates from a patterned measurement image.

[0107] Reference Figure 5 , Figure 7 and Figure 8In operation S1030, a pattern can be captured to generate a pattern measurement image. A pattern can be captured to generate a pattern measurement image in real time. The first pattern PT1 and the second pattern PT2 (see [reference]) of the first point P1 captured by the first camera 210 at coordinates IP1 to IPn can be used to generate the image. Figure 6 The first pattern measurement image MPI1 and the second pattern measurement image MPI2 are generated. A third pattern PT3 and a fourth pattern PT4 (see [reference]) can be generated based on the second point P2 captured by the first camera 210 at coordinates IP1 to IPn. Figure 6 This generates a third pattern measurement image MPI3 and a fourth pattern measurement image MPI4. Therefore, four pattern measurement images can be generated at each of the first coordinate IP1 to the nth coordinate IPn.

[0108] Reference Figure 5 and Figure 8 In operation S1030, the measurement coordinates can be determined using the brightness ratio of the second pattern measurement image MPI2 to the first pattern measurement image MPI1.

[0109] The first measurement coordinates for determining the target measurement coordinates corresponding to the right-eye viewpoint can be determined using the brightness ratio of the second pattern measurement image MPI2 to the first pattern measurement image MPI1 at the first point P1. The first measurement coordinate can be determined as a d-th coordinate IPd where the brightness ratio of the second pattern measurement image MPI2 to the first pattern measurement image MPI1 at that point is at a low value (e.g., a minimum value). For example, the d-th coordinate IPd can be the coordinate where the brightness of the first pattern measurement image MPI1 of the right-eye pattern at the first point P1 is relatively higher than the brightness of the second pattern measurement image MPI2 of the left-eye pattern. Therefore, the crosstalk of the right-eye viewpoint relative to the first point P1 can have a low value, e.g., a minimum value, at the d-th coordinate IPd.

[0110] The second measurement coordinates for determining the target measurement coordinates corresponding to the right-eye viewpoint can be determined using the brightness ratio of the fourth pattern measurement image MPI4 to the third pattern measurement image MPI3 at the second point P2. The second measurement coordinates can be determined as a c-th coordinate IPc where the brightness ratio of the fourth pattern measurement image MPI4 to the third pattern measurement image MPI3 at that location can be at a low value (e.g., a minimum value). For example, the c-th coordinate IPc can be the coordinate where the brightness of the third pattern measurement image MPI3 of the right-eye pattern at the second point P2 is relatively higher than the brightness of the fourth pattern measurement image MPI4 of the left-eye pattern. Therefore, the crosstalk of the right-eye viewpoint relative to the second point P2 can have a low value, e.g., a minimum value, at the c-th coordinate IPc.

[0111] A third measurement coordinate can be determined using the brightness ratio of the first pattern measurement image MPI1 to the second pattern measurement image MPI2 at the first point P1 to determine the target measurement coordinates corresponding to the left eye viewpoint. The third measurement coordinate can be determined as a b-th coordinate IPb where the brightness ratio of the first pattern measurement image MPI1 to the second pattern measurement image MPI2 at that location can be at a low value (e.g., a minimum value). For example, the b-th coordinate IPb can be the coordinate where the brightness of the second pattern measurement image MPI2 of the left eye pattern at the first point P1 is relatively higher than the brightness of the first pattern measurement image MPI1 of the right eye pattern. Therefore, the crosstalk of the left eye viewpoint relative to the first point P1 can have a low value, e.g., a minimum value, at the b-th coordinate IPb.

[0112] The fourth measurement coordinate, used to determine the target measurement coordinates corresponding to the left-eye viewpoint, can be determined using the brightness ratio of the third pattern measurement image MPI3 to the fourth pattern measurement image MPI4 at the second point P2. The fourth measurement coordinate can be determined as a coordinate IPa where the brightness ratio of the third pattern measurement image MPI3 to the fourth pattern measurement image MPI4 at that location can be at a low value (e.g., a minimum value). For example, the a-coordinate IPa can be the coordinate where the brightness of the fourth pattern measurement image MPI4 of the left-eye pattern at the second point P2 is relatively higher than the brightness of the third pattern measurement image MPI3 of the right-eye pattern. Therefore, the crosstalk of the left-eye viewpoint relative to the second point P2 can have a low value, e.g., a minimum value, at the a-coordinate IPa.

[0113] Figure 9 It is shown that Figure 2 The controller of the evaluation device determines the target measurement coordinates in an example view.

[0114] Reference Figure 5 and Figure 9 In operation S1040, the target measurement coordinates can be determined. For example, the target measurement coordinates can be determined using a virtual line extending from the pattern to the measurement coordinates.

[0115] The first target measurement coordinate CP1 corresponding to the left eye viewpoint can be determined as the point where the first virtual line VLN1 and the second virtual line VLN2 overlap. For example, controller 230 (see...) Figure 4 A first virtual line VLN1 can be generated extending from a first point P1 to the b-th coordinate IPb, and a second virtual line VLN2 can be generated extending from a second point P2 to the a-th coordinate IPa. Furthermore, the point where the first virtual line VLN1 and the second virtual line VLN2 overlap can be defined as the first target measurement coordinate CP1.

[0116] The second target measurement coordinate CP2 corresponding to the right eye viewpoint can be determined as the point where the third virtual line VLN3 and the fourth virtual line VLN4 overlap. For example, the controller 230 can generate the third virtual line VLN3 extending from the first point P1 to the d-th coordinate IPd, and can generate the fourth virtual line VLN4 extending from the second point P2 to the c-th coordinate IPc. Furthermore, the point where the third virtual line VLN3 and the fourth virtual line VLN4 overlap can be determined as the second target measurement coordinate CP2.

[0117] Figure 10 It is shown that Figure 2 An example view of a reference image captured by the second camera of the evaluation device.

[0118] Reference Figure 5 and Figure 10 In operation S1050, a reference image of the viewpoint can be output on the display panel DP. The display panel DP has pixels PXL (see...). Figure 3 It can output the first reference image to the third reference image.

[0119] According to an embodiment, the first reference image to the third reference image can be represented by the first pixel group PXG1 and the second pixel group PXG2 (see...). Figure 3 The first reference image can be displayed in various ways. For example, a first reference image can display white grayscale using a first pixel group PXG1 and dark (e.g., black) grayscale using a second pixel group PXG2. The first reference image can be a left-eye image corresponding to the left-eye viewpoint. A second reference image can display black grayscale using the first pixel group PXG1 and light (e.g., white) grayscale using the second pixel group PXG2. The second reference image can be a right-eye image corresponding to the right-eye viewpoint. A third reference image can display black grayscale using the first pixel group PXG1 and the second pixel group PXG2. The third reference image can be a compensation image to compensate for errors caused by other factors (e.g., ambient light).

[0120] Reference Figure 5 and Figure 10 In operation S1060, a second camera 220 can be used to capture a reference image at the target measurement coordinates.

[0121] According to one embodiment, the second camera 220 can be moved relative to the display panel DP. The second camera 220 can move from any of the first coordinates IP1 to the nth coordinate IPn to the first target measurement coordinate CP1. The second camera 220 can capture first to third reference images of the display panel DP at the first target measurement coordinate CP1 where the crosstalk at the left eye viewpoint is low (e.g., minimum). According to another embodiment, the second camera 220 can move from any of the first coordinates IP1 to the nth coordinate IPn to the second target measurement coordinate CP2. The second camera 220 can capture first to third reference images of the display panel DP at the second target measurement coordinate CP2 where the crosstalk at the right eye viewpoint is low (e.g., minimum).

[0122] Additionally, the second camera 220 can measure the brightness of reference images captured in real time. For example, the second camera 220 can measure the brightness of the first to third reference images relative to the first target measurement coordinates CP1 and the second target measurement coordinates CP2. Specifically, the second camera 220 can measure the brightness value corresponding to each pixel PXL in the first to third reference images.

[0123] When the evaluation device includes a camera configured to capture patterns and capture reference images, the camera mode can be changed to capture reference images during operation S1060.

[0124] Figure 11 It is shown in Figure 10 An example view of a reference image taken in the image.

[0125] Reference Figure 5 and Figure 11 In operation S1070, the brightness values ​​of the captured reference images can be used to evaluate crosstalk at at least one viewpoint. In operation S1070, the brightness values ​​of the captured reference images can be used to evaluate crosstalk at each viewpoint. For clarity, the first reference image MRI1 to the third reference image MRI3, captured at the first target measurement coordinate CP1 corresponding to the left eye viewpoint, can be shown as an example below.

[0126] Crosstalk at the left-eye viewpoint can be evaluated using the brightness values ​​of the first reference image MRI1 to the third reference image MRI3, taken at the first target measurement coordinate CP1 corresponding to the left-eye viewpoint. According to an embodiment, crosstalk can be evaluated using a first brightness value measured by the first reference image MRI1, a second brightness value measured by the second reference image MRI2, and a third brightness value measured by the third reference image MRI3.

[0127] For example, controller 230 can calculate a first corrected luminance value by subtracting a third luminance value measured by a third reference image MRI3 from a first luminance value measured by a first reference image MRI1. A second corrected luminance value can be calculated by subtracting a third luminance value measured by a third reference image MRI3 from a second luminance value measured by a second reference image MRI2. Crosstalk at the left eye viewpoint can be evaluated as the ratio of the second corrected luminance value to the first corrected luminance value. However, embodiments are not limited to this. For example, when using luminance values ​​measured at target measurement coordinates, crosstalk can be evaluated by applying known crosstalk analysis algorithms.

[0128] Figure 12 It is shown by Figure 2 A view of an example of crosstalk evaluated by an evaluation device.

[0129] Reference Figure 12 The evaluation device ED can evaluate and output crosstalk at least one viewpoint. For example, the evaluation device ED can measure the first target coordinates CP1 corresponding to the left eye viewpoint (see...). Figure 10 Crosstalk evaluated at point ) or at the second target measurement coordinate CP2 corresponding to the right eye viewpoint (see Figure 10 The crosstalk output evaluated at point ) is in 2D data format. For example... Figure 12 As shown, the 2D data can be displayed by color based on the size of the crosstalk evaluated for each pixel's PXL.

[0130] Figure 13 It shows the use Figure 12 A view of an example of uniformity in crosstalk analysis.

[0131] Reference Figure 13 The evaluation device ED can output the uniformity value of crosstalk from at least one viewpoint. For example, the evaluation device ED can analyze crosstalk and output the uniformity data in 2D form.

[0132] In an embodiment, crosstalk in the first region AR1 can have a high value (e.g., a maximum value), and crosstalk in the second region AR2 can have a low value (e.g., a minimum value). For example, the first region AR1 may include a pixel with coordinates (1, 18) in 2D data. The value obtained by converting the magnitude of crosstalk in the first region AR1 to a numerical value can be approximately 2.39%. The second region AR2 may include a pixel with coordinates (14, 2) in 2D data. The value obtained by converting the magnitude of crosstalk in the second region AR2 to a numerical value can be approximately 1.48%. Figure 13In the 2D form of the data, the average value obtained by converting the magnitude of crosstalk into numerical values ​​can be approximately 2.78%, and the standard deviation can be approximately 10.0%. However, the embodiments are not limited to this, and the uniformity of crosstalk can be evaluated by applying known methods.

[0133] In this way, by analyzing uniformity using at least one of the average, maximum, minimum and RSD values ​​of crosstalk in 2D data, the evaluation device ED can more effectively evaluate the degree of crosstalk in the display device DD.

[0134] In the evaluation apparatus for evaluating an image of a display device according to an embodiment of the present invention, the accuracy of the evaluation can be improved by pre-determining target measurement coordinates corresponding to the left-eye and right-eye viewpoints and evaluating the crosstalk of the display device at the determined target measurement coordinates. Furthermore, the evaluation apparatus can shorten the crosstalk evaluation time by measuring the brightness values ​​of multiple shots (which may be a reduced number of shots) corresponding to the target measurement coordinates. For example, a minimum number of shots can be determined corresponding to the number of target measurement coordinates. As described herein, the target measurement coordinates CP can be determined by the position determination unit 232 as the coordinates where the crosstalk at each viewpoint has a minimum value.

[0135] According to an embodiment of the present invention, an evaluation device with improved accuracy and an evaluation method using a display device employing the evaluation device are provided.

[0136] The effects of the embodiments are not limited to those illustrated above, and many more effects are included in this specification.

[0137] Although specific embodiments and applications have been described herein, other embodiments and modifications can be derived from the above description. Therefore, the present invention is not limited to such embodiments, but is limited to the broader scope of the presented claims and various obvious modifications and equivalent arrangements.

Claims

1. An evaluation apparatus for evaluating a display device, the display device displaying an image of a viewpoint via a display panel, characterized in that, The evaluation device includes: A first camera is configured to capture a pattern of the viewpoint displayed by the display panel at coordinates arranged along a first direction. A second camera is configured to capture a reference image of the viewpoint displayed on the display panel at the target measurement coordinates; and The controller is configured to generate a pattern measurement image based on the pattern captured by the first camera, determine the target measurement coordinates using the brightness ratio of the pattern measurement image, and evaluate crosstalk at at least one of the viewpoints using the brightness value of the reference image captured by the second camera at the target measurement coordinates.

2. The evaluation device according to claim 1, characterized in that, The evaluation device further includes: A first clamp is configured to support the first camera and the second camera; and The second clamp is configured to support the display device. Wherein, the first camera is configured to move relative to the second clamp in the first direction and in a direction opposite to the first direction, and The second camera is configured to move relative to the second clamp in the first direction, the direction opposite to the first direction, a third direction perpendicular to the first direction, and the direction opposite to the third direction.

3. The evaluation device according to claim 2, characterized in that, The first clamp is configured to move the first camera and the second camera in the first direction, the direction opposite to the first direction, the third direction, and the direction opposite to the third direction. The second clamp is configured to move the display device in the first direction and in the direction opposite to the first direction.

4. The evaluation device according to claim 1, characterized in that, The pattern is displayed as an overlay of a first line and a second line, the first line being spaced apart from the center point of a reference line in a direction opposite to the first direction, and the second line being spaced apart from the center point in the first direction, wherein the reference line extends on the display panel in the first direction.

5. The evaluation device according to claim 4, characterized in that, The first line and the second line extend from a first point corresponding to 1 / 10 and a second point corresponding to 9 / 10 when the reference line is divided into ten equal parts along the first direction, respectively, in a second direction intersecting the first direction and in a direction opposite to the second direction. The pattern includes a first pattern and a second pattern displayed as overlapping the first line, and a third pattern and a fourth pattern displayed as overlapping the second line. The first pattern and the second pattern face each other, and the reference line is placed between the first pattern and the second pattern. The third pattern and the fourth pattern face each other, and the reference line is placed between the third pattern and the fourth pattern.

6. The evaluation device according to claim 5, characterized in that, The pattern is positioned adjacent to the reference line. The first pattern and the third pattern are spaced apart from the reference line in the second direction, and The second pattern and the fourth pattern are spaced apart from the reference line in the direction opposite to the second direction.

7. The evaluation device according to claim 5, characterized in that, The pattern measurement images include a first pattern measurement image and a second pattern measurement image generated from the first pattern and the second pattern, and a third pattern measurement image and a fourth pattern measurement image generated from the third pattern and the fourth pattern. The controller determines a first measurement coordinate where the brightness ratio of the second pattern measurement image to the first pattern measurement image is low, a second measurement coordinate where the brightness ratio of the fourth pattern measurement image to the third pattern measurement image is low, a third measurement coordinate where the brightness ratio of the first pattern measurement image to the second pattern measurement image is low, and a fourth measurement coordinate where the brightness ratio of the third pattern measurement image to the fourth pattern measurement image is low.

8. The evaluation device according to claim 7, characterized in that, The controller determines the point where the first virtual line extending from the first point to the third measurement coordinate overlaps with the second virtual line extending from the second point to the fourth measurement coordinate as the target measurement coordinate of the first viewpoint in the viewpoint, and The controller determines the target measurement coordinates of the second viewpoint in the viewpoint by overlapping the third virtual line extending from the first point to the first measurement coordinate and the fourth virtual line extending from the second point to the second measurement coordinate.

9. The evaluation device according to claim 1, characterized in that, The display panel includes pixels. The pixels include a first pixel group configured to display a stereoscopic image and a second pixel group configured to display the stereoscopic image, and The reference image is displayed using the first pixel group and the second pixel group. The reference image includes a first reference image corresponding to a first viewpoint in the viewpoints, a second reference image corresponding to a second viewpoint in the viewpoints, and a third reference image that corresponds to both the first viewpoint and the second viewpoint. The first reference image is configured to display white grayscale through the first pixel group and black grayscale through the second pixel group. The second reference image is configured to display the black grayscale through the first pixel group and the white grayscale through the second pixel group, and The third reference image is configured to display the black grayscale through the first pixel group and the second pixel group.

10. The evaluation device according to claim 9, characterized in that, The controller calculates a first corrected brightness value by subtracting a third brightness value measured by the third reference image from a first brightness value measured by the first reference image, and calculates a second corrected brightness value by subtracting the third brightness value measured by the third reference image from a second brightness value measured by the second reference image. The controller uses the ratio of the second corrected brightness value to the first corrected brightness value to evaluate the crosstalk at the first viewpoint.

Images