Test system of naked eye three-dimensional display device

Abstract

The utility model provides a test system of a naked eye three-dimensional display device. The test system comprises a rotary table, a camera and an optical element, the rotary table is used for driving the camera or the to-be-tested naked-eye stereoscopic display device to rotate, so that the naked-eye stereoscopic display device rotates relative to the camera; the optical element is used for reflecting or refracting light emitted by a part of sub-pixels lightened by the naked eye three-dimensional display device to the camera; the camera is used for collecting test images of the naked eye stereoscopic display device at multiple rotation angles so as to perform viewpoint distribution based on the test images at the multiple rotation angles; wherein different sub-pixel groups of the naked eye three-dimensional display device are lightened when different test images are acquired at the same rotation angle, and each sub-pixel group comprises at least one sub-pixel; and when the sub-pixel group comprises a plurality of sub-pixels, sub-pixels which are not lightened are arranged between adjacent sub-pixels in the sub-pixel group at intervals. Through the reflection or refraction of the optical element, the rotation angle is reduced, and the test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of naked-eye stereoscopic display, and in particular to a test system of a naked-eye stereoscopic display device. BACKGROUND

[0002] The naked-eye stereoscopic display device is a device that can present a stereoscopic image without wearing 3D glasses. The naked-eye stereoscopic display device includes a pixel array, and before display, a viewpoint needs to be assigned to each sub-pixel in the pixel array to improve the display quality of the naked-eye stereoscopic image.

[0003] In the related art, when assigning the viewpoint, a lighted picture of each sub-pixel of the naked-eye stereoscopic display device is usually shot at different viewpoints. When the number of viewpoints is large and the screen resolution is high, it takes a long time to shoot each sub-pixel at each viewpoint, and the efficiency is low.

[0004] Therefore, there is an urgent need to provide an efficient test system of a naked-eye stereoscopic display device to realize viewpoint assignment of sub-pixels. CONTENT OF THE INVENTION

[0005] The present application provides a test system of a naked-eye stereoscopic display device. In order to realize viewpoint assignment of sub-pixels, the test system can test multiple sub-pixels of the naked-eye stereoscopic display device at one rotation angle during testing, thereby improving the test efficiency. Meanwhile, the test system can reduce the number of rotation angles by reflecting or refracting the light emitted by the lighted sub-pixels through an optical element, thereby improving the test efficiency.

[0006] In order to achieve the foregoing purpose, the present application provides a test system of a naked-eye stereoscopic display device, comprising: a turntable, a camera, and an optical element.

[0007] The turntable is configured to drive the camera or the naked-eye stereoscopic display device to be tested to rotate, so that the naked-eye stereoscopic display device rotates relative to the camera.

[0008] The optical element is configured to reflect or refract the light emitted by the lighted part of the sub-pixels of the naked-eye stereoscopic display device to the camera.

[0009] The camera is configured to collect test images of the naked-eye stereoscopic display device at multiple rotation angles, and to assign a viewpoint based on the test images at the multiple rotation angles.

[0010] In a possible implementation, the test system further comprises a post-processing device. The post-processing device is configured to store the test images and their corresponding rotation angles.

[0011] In a possible implementation, one rotation angle corresponds to multiple test images, and the sub-pixels of the naked-eye stereoscopic display device that are lighted when different test images are collected at the same rotation angle are different.

[0012] In a possible implementation, the naked-eye stereoscopic display device is divided into a plurality of partitions, and in the test image, each partition of the plurality of partitions is lit by at least one sub-pixel group including at least one sub-pixel.

[0013] In a possible implementation, the test system further includes a driver, and the driver is configured to light the sub-pixels of each partition based on the stored driving signal corresponding to each partition.

[0014] In a possible implementation, the optical element is a prism or a lens.

[0015] In a possible implementation, the optical element is a galvanometer mirror, and the galvanometer mirror is configured to scan according to a preset scanning mode at each rotation angle, so as to reflect the light emitted by the lit sub-pixels to the camera at different positions and angles.

[0016] Correspondingly, the post-processing device is further configured to store the position and angle of the galvanometer mirror at each rotation angle.

[0017] In a possible implementation, the optical element is a plurality of optical elements, and the plurality of optical elements include a galvanometer mirror and at least one of a prism and a lens; and the light emitted by the part of the sub-pixels of the naked-eye stereoscopic display device is reflected or refracted to the camera through linkage control of the plurality of optical elements.

[0018] In a possible implementation, the galvanometer mirror includes a vibration system and a mirror piece, and the vibration system is configured to adjust the position and angle of the mirror piece.

[0019] In a possible implementation, the test system further includes an adjustment module, and the adjustment module includes an angle sensor, a position sensor, and a controller; the angle sensor and the position sensor are configured to detect the position and angle of the optical element, respectively; and the controller is configured to generate a control instruction based on the position and angle of the optical element fed back by the angle sensor and the position sensor, so as to adjust the position and angle of the optical element.

[0020] In a possible implementation, the optical element is fixed to the two sides of the rotary table through a fixing assembly.

[0021] In a possible implementation, the fixing assembly is a mechanical arm, and the angle and / or position of the optical element are adjusted by the mechanical arm at each rotation angle.

[0022] Correspondingly, the post-processing device is further configured to store the angle and / or position of the optical element at each rotation angle.

[0023] In a possible implementation, the rotating table is a single-axis rotating table, and the rotating shaft of the rotating table includes a horizontal rotating shaft, which is configured to drive the naked-eye stereoscopic display device to rotate in a horizontal plane.

[0024] In a possible implementation, the rotating table is a double-axis rotating table, and the rotating shaft of the rotating table includes a horizontal rotating shaft and a pitching rotating shaft, which are configured to drive the naked-eye stereoscopic display device to rotate in a horizontal plane and to pitch, respectively.

[0025] In a possible implementation, the test system further includes a slide rail, and the camera or the rotating table is movable along the slide rail to adjust the distance between the camera and the naked-eye stereoscopic display device placed on the rotating table.

[0026] In a possible implementation, the test system further includes a dark box, and the camera, the rotating table and the optical element are placed in the dark box.

[0027] In a possible implementation, the test system further includes a code scanner, and the code scanner is configured to scan an identification code on the naked-eye stereoscopic display device to obtain identification information of the naked-eye stereoscopic display device.

[0028] The post-processing device is further configured to store the identification information of the naked-eye stereoscopic display device, the test image of the naked-eye stereoscopic display device and the corresponding rotating angle in association.

[0029] The test system for the naked-eye stereoscopic display device provided in the present application controls the rotation of the naked-eye stereoscopic display device relative to the camera through the rotating table, reflects or refracts the light emitted by the lighted partial sub-pixels to the camera through the optical element, captures the test image when the lighted group sub-pixels are photographed by the camera, and uses the test image and the corresponding rotating angle as the original test data to perform the viewpoint allocation of the sub-pixels of the naked-eye stereoscopic display device. Through the setting of the optical element, the camera can capture the light emitted by the sub-pixels that cannot be collected at a certain rotating angle, thereby reducing the number of rotating angles and greatly reducing the number of test images, and improving the test efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0031] Figure 1 A schematic diagram of a viewpoint allocation process for a naked-eye stereoscopic display device;

[0032] Figure 2 A structure schematic diagram of the test system for the naked-eye stereoscopic display device provided in Embodiment One of the present application;

[0033] Figure 3AA schematic diagram of pixel array average division result provided by the embodiment one of the present application;

[0034] Figure 3B A schematic diagram of pixel array non-average division result provided by the embodiment one of the present application;

[0035] Figure 4 A structure schematic diagram of the test system of the naked-eye stereoscopic display device provided by the embodiment two of the present application;

[0036] Figure 5 A top view of the test system of the naked-eye stereoscopic display device provided by the embodiment three of the present application;

[0037] Figure 6 A structure schematic diagram of the test system of the naked-eye stereoscopic display device provided by the embodiment four of the present application;

[0038] Figure 7 A schematic diagram of the optical element layout provided by the embodiment four of the present application;

[0039] Figure 8 A structure schematic diagram of the test system of the naked-eye stereoscopic display device provided by the embodiment five of the present application.

[0040] Reference signs:

[0041] 100 - naked-eye stereoscopic display device;

[0042] 210 - turntable; 211 - horizontal rotation shaft; 212 - pitch rotation shaft;

[0043] 220 - camera;

[0044] 230 - optical element;

[0045] 240 - post-processing device;

[0046] 250 - slide rail;

[0047] 260 - code scanner;

[0048] 270 - dark box.

[0049] Through the above figures, the specific embodiments of the present application have been shown, and will be described in more details hereinafter. These figures and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0050] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0051] Furthermore, in this application, directional terms such as "front" and "rear" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0052] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In glasses-free stereoscopic display technology, beam-splitting elements, such as lenticular gratings and slit gratings, are typically used to split the image displayed on the monitor, so that the displayed content presents different images when it reaches the human eyes, thus achieving the effect of displaying a stereoscopic image.

[0054] In order to display parallax images, viewpoints need to be pre-assigned to each sub-pixel in the pixel array of the naked-eye stereoscopic display device. The accuracy of viewpoint assignment is an important factor affecting the display quality of naked-eye stereoscopic images.

[0055] Figure 1 A schematic diagram illustrating the viewpoint allocation process of a glasses-free stereoscopic display device, as shown below. Figure 1 As shown, for multi-viewpoint glasses-free stereoscopic display devices, when allocating viewpoints, cameras need to be deployed at different viewpoints, for example... Figure 1 The VPNs from vp1 to vpn traverse and illuminate each sub-pixel of the glasses-free 3D display device. Figure 1 The algorithm uses solid circles to represent sub-pixels and captures an image of a single lit sub-pixel from a given viewpoint to obtain the brightness of the sub-pixel at each viewpoint. The viewpoint at which the sub-pixel's brightness is maximized is the viewpoint assigned to that sub-pixel.

[0056] Assuming the number of viewpoints is 61 and the resolution of the naked-eye stereoscopic display screen is 1280×720, then the number of photos that need to be taken is 61×1280×720. The excessive time required for taking photos leads to low testing efficiency.

[0057] In order to solve the problem of low test efficiency of the naked-eye stereoscopic display device in view point allocation, the application provides a test system of a naked-eye stereoscopic display device, which rotates the camera or the naked-eye stereoscopic display device to be tested by a turntable to simulate different view points, and then sequentially lights the sub-pixel groups of the naked-eye stereoscopic display device under each view point, wherein the sub-pixel groups lighted each time are different, and the camera is used to shoot the image of the naked-eye stereoscopic display device when each sub-pixel group is lighted, so as to obtain the test image under each view point. Meanwhile, the optical element is used to change the direction of the light emitted by the part of the sub-pixels lighted, and the light is reflected or refracted to the camera, so that the camera can capture the image of the sub-pixel which cannot be captured originally, the number of the rotation angles during the test is reduced, the number of the test images collected is greatly reduced, and the test efficiency is improved. In addition, the test efficiency can be further improved by setting the sub-pixel group to contain more sub-pixels, and the number of the test images under each rotation angle is reduced.

[0058] The technical solutions of the application and how the technical solutions solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the application will be described below with reference to the drawings.

[0059] Embodiment one

[0060] Figure 2 The structure schematic diagram of the test system of the naked-eye stereoscopic display device provided by the embodiment one of the application is shown in Figure 2 The test system comprises a turntable 210, a camera 220 and an optical element 230.

[0061] The turntable 210 is used to rotate the camera 220 or the naked-eye stereoscopic display device 100 to be tested, so that the naked-eye stereoscopic display device 100 rotates relative to the camera 220. The optical element 230 is used to reflect or refract the light emitted by the part of the sub-pixels of the naked-eye stereoscopic display device 100 lighted to the camera 220.

[0062] The camera 220 is used to collect the test images of the naked-eye stereoscopic display device 100 under multiple rotation angles, so as to allocate the view points based on the test images under the multiple rotation angles.

[0063] One rotation angle can correspond to multiple test images. In order to improve the efficiency, the sub-pixels of the naked-eye stereoscopic display device 100 lighted are different when different test images are collected under the same rotation angle.

[0064] When a test image is captured, at least one sub-pixel group of the naked-eye stereoscopic display device 100 is lighted, and one sub-pixel group includes at least one sub-pixel. When the sub-pixel group includes multiple sub-pixels, the multiple sub-pixels in the sub-pixel group can be continuous multiple sub-pixels, or there can be un-lighted sub-pixels between adjacent lighted sub-pixels in the sub-pixel group.

[0065] The turntable 210 can be a single-axis turntable, a double-axis turntable, or a multi-axis turntable, and the platform of the turntable 210 can be circular or rectangular. The turntable 210 can be driven by a motor or a hydraulic motor.

[0066] In some embodiments, during testing, the naked-eye stereoscopic display device 100 to be tested can be fixed on the turntable 210, and the naked-eye stereoscopic display device 100 is rotated by the turntable 210. The camera 220 can be fixed on the ground by a support such as a tripod and faces the turntable 210 to capture the display screen of the naked-eye stereoscopic display device 100 placed on the turntable 210, and obtain a test image.

[0067] At the initial moment of testing, the naked-eye stereoscopic display device 100 is aligned with the camera 220, that is, the focusing center of the camera 220 coincides with the center of the screen of the naked-eye stereoscopic display device 100.

[0068] In some embodiments, the camera 220 can be located on an adjusting platform, and the pose of the camera 220 is adjusted by the adjusting platform to align the camera 220 with the naked-eye stereoscopic display device 100 to be tested at the initial moment of the testing stage.

[0069] During testing, the camera 220 can capture the display screen of the naked-eye stereoscopic display device 100 at a certain frequency to obtain a test image.

[0070] In other embodiments, during testing, the naked-eye stereoscopic display device 100 to be tested can be fixed by a support, and the camera 220 is fixed on the turntable 210, and the camera 220 is rotated by the turntable 210 to capture the display screen of the naked-eye stereoscopic display device 100 at different viewpoints, that is, at different rotation angles, to obtain a test image.

[0071] During testing, the display screen of the naked-eye stereoscopic display device 100 can be a screen in which part of the sub-pixels are lighted. The lighted sub-pixels can be of the same color or different colors. The lighted sub-pixels can be continuous sub-pixels or spaced sub-pixels, that is, there can be un-lighted sub-pixels between adjacent lighted sub-pixels.

[0072] Optionally, the naked-eye stereoscopic display device 100 is divided into multiple partitions, and in a test image, at least one sub-pixel group in each partition of the multiple partitions is lighted, and one sub-pixel group includes at least one sub-pixel.

[0073] The naked-eye stereoscopic display device 100 can include a preset number of partitions. The naked-eye stereoscopic display device 100 can be partitioned in an average manner such that the size of each partition (i.e., the number of rows and columns of sub-pixels included) is as uniform as possible. The naked-eye stereoscopic display device 100 can also be partitioned in a non-average manner. When testing, for each rotation angle, one or more groups of sub-pixels in the same position of each partition of the naked-eye stereoscopic display device 100 can be lit each time the sub-pixels are lit, and a camera 220 can capture a display image of the naked-eye stereoscopic display device 100 to obtain a test image. By switching the groups of sub-pixels that are lit, a plurality of test images for the rotation angle can be obtained.

[0074] Optionally, the test system further includes a driver configured to light the sub-pixels of each partition based on the stored driving signals corresponding to each partition.

[0075] The driver can be a driving circuit or a driving chip. The driving signals corresponding to each partition can be artificially given or uploaded, or determined by the control unit. The driving signals can be driving voltages or currents.

[0076] Before testing the naked-eye stereoscopic display device 100, an image in which at least some of the sub-pixels of each partition of the naked-eye stereoscopic display device 100 are lit can be captured by the camera 220. The driving signals corresponding to each partition can be determined based on the distribution of luminance values of different partitions in the image.

[0077] The driving signals corresponding to each partition can be determined by a control unit based on the image in which at least some of the sub-pixels of each partition of the naked-eye stereoscopic display device 100 are lit, to achieve balanced driving of each partition, so that the luminance of the lit sub-pixels of each partition in the image is balanced, avoiding the impact of the luminance difference of the lit sub-pixels in the image on the test results.

[0078] When the camera 220 is directly opposite the naked-eye stereoscopic display device 100, all the sub-pixels of the naked-eye stereoscopic display device 100 can be lit, and an image in which all the sub-pixels are lit can be captured by the camera 220. The driving signals corresponding to each partition can be determined based on the distribution of luminance values of different partitions in the image, with the goal of balancing the luminance of each partition. The partition with the lowest luminance value in the image can be determined first. The ratio of the luminance value of the partition to the luminance values of each partition can be calculated based on the partition as a reference. The driving coefficients of each partition can be obtained based on the ratio. The driving signals corresponding to each partition can be the product of the driving coefficients of each partition and a reference signal. By configuring appropriate driving signals for each partition, the sub-pixels in each partition are lit, so that the luminance of the lit sub-pixels of different partitions is balanced, avoiding the impact of the unbalanced luminance in the image on the test results.

[0079] Figure 3AA schematic diagram of the pixel array average division result provided by Embodiment One of the present application is shown in Figure 3A Figure 3A Taking the pixel array of the naked-eye stereoscopic display device including 24x32 sub-pixels as an example, each partition includes 6x8 sub-pixels, and the total number of partitions is 16.

[0080] Figure 3B A schematic diagram of a pixel array non-average division result provided by Embodiment One of the present application is shown in Figure 3B For the naked-eye stereoscopic display device with a pixel array including 24x24 sub-pixels, a non-average division method can be used to divide the pixel array into 14 partitions, in turn, partition 1 to partition 16, and the number of sub-pixels included in each partition is shown in Figure 3B The partitions can be divided into four kinds of 4x4 (partition 1 and 11), 4x8 (partition 7 and 10), 6x6 (partition 2, 3, 12 and 13), 6x12 (partition 6 and 9), 8x4 (partition 5 and 8), and 8x8 (partition 10 and 14).

[0081] The screen of the naked-eye stereoscopic display device 100 can be a curved screen or a straight screen. For the curved screen, the size of the partition can be determined based on the bending degree of each part of the curved screen.

[0082] For the straight screen, an average division method can be used to divide the pixel array of the screen to obtain a plurality of partitions.

[0083] For the curved screen, the division method of the pixel array of the screen is determined based on the curve function of the curved screen, and the pixel array is divided into a plurality of partitions based on the determined division method.

[0084] Regardless of the division method used to divide the pixel array, the sub-pixels included in each partition need to satisfy the following condition: the width covered by the sub-pixels in a predetermined direction is greater than the theoretical width covered by the light splitting unit in the predetermined direction.

[0085] For example, assuming that a partition includes 8x8 pixels, and the sub-pixel pij represents the sub-pixel in the i-th row and the j-th column of the partition. For example, five sub-pixels of the partition need to be lit at the time of testing, which can be five continuous sub-pixels in a row, such as p32 to p36, or five discontinuous sub-pixels in a column, such as p14, p34, p54, p74 and p94.

[0086] For example, the camera 220 can be an industrial camera, such as a color industrial camera.

[0087] The optical element 230 can be one or more, and can be arranged on one side or both sides of the turntable 210. One or more optical elements 230 can be arranged on each side.​

[0088] The optical element 230 is used to change the propagation direction of the light emitted by the lit sub-pixels, so that the light emitted by the partially lit sub-pixels that cannot be captured by the camera 220 originally is captured by the camera 220, and the image of the lit sub-pixel is contained in the test image. This is equivalent to widening the field of view of the camera 220 or reducing the size and light-emitting angle range of the naked-eye stereoscopic display device 100, so that the number of rotation angles can be reduced.

[0089] The optical element 230 can be any element that can reflect or refract light, such as a plane mirror, a lens, a triangular prism, a galvanometer, etc.

[0090] The rotation angle of the turntable 210 can be rotated according to a default step size, and at each rotation angle, it is stopped for at least a preset time, which is at least the time required for the sub-pixel groups of each batch of lit partitions. The sub-pixels contained in the entire sub-pixel group of the partitioned lit sub-pixels are the lit sub-pixels of the partition.

[0091] Before the test starts, the position of the camera 220 can be calibrated so that the focusing center of the camera 220 is aligned with the center of the screen of the naked-eye stereoscopic display device 100. After alignment, the test phase is entered, and the turntable 210 drives the camera 220 or the naked-eye stereoscopic display device 100 to rotate, and the camera 220 captures the display screen of the naked-eye stereoscopic display device 100 at a certain frequency or a certain time after the turntable 210 rotates to a specified angle, and obtains a test image.

[0092] The test system of the naked-eye stereoscopic display device provided in the embodiment controls the rotation of the naked-eye stereoscopic display device 100 relative to the camera 220 through the turntable 210, reflects or refracts the light emitted by the lit sub-pixels to the camera through the optical element 230 arranged, captures the test image when the camera 220 captures the lit sub-pixels, and uses the test image and the corresponding rotation angle as the original test data for the viewpoint distribution of the sub-pixels of the naked-eye stereoscopic display device 100. Through the arrangement of the optical element 230, the camera 220 can capture the light emitted by the sub-pixels that cannot be collected at a certain rotation angle, thereby reducing the number of rotation angles and greatly reducing the number of test images, thereby improving the test efficiency. At the same time, multiple sub-pixels can be lit at a time during each lighting, thereby further reducing the number of test images at each rotation angle and further improving the test efficiency.

[0093] During the test, the test images at each rotation angle can be stored in a memory or a post-processing device, so as to facilitate the post-processing device to perform viewpoint distribution of the naked-eye stereoscopic display device 100 based on the stored test images at each rotation angle.

[0094] Embodiment Two

[0095] Figure 4 The structural schematic diagram of the test system of the naked-eye stereoscopic display device provided in Embodiment Two is shown in FIG. 2. As shown in FIG. 2, the test system comprises a turntable 210, a camera 220, and a post-processing device 240. Figure 2 Figure 4 In this embodiment, the test system further comprises the post-processing device 240 connected with the turntable 210 and the camera 220, which can be wired or wireless connection. The post-processing device 240 is used to store the test images collected by the camera 220 and the corresponding rotation angles.

[0096] Optionally, a rotation angle corresponds to multiple test images, and the sub-pixels of the naked-eye stereoscopic display device 100 illuminated at different times of collecting different test images under the same rotation angle are different.

[0097] For example, the post-processing device 240 can be a computer or other host computer.

[0098] In some embodiments, the post-processing device 240 is further used to control the sub-pixels of the naked-eye stereoscopic display device 100.

[0099] The control signals corresponding to the images displayed by the naked-eye stereoscopic display device 100 can be pre-stored in the post-processing device 240. During the test, the post-processing device 240 issues the control signals to the control panel of the naked-eye stereoscopic display device 100, thereby controlling the naked-eye stereoscopic display device 100 to display the corresponding images.

[0100] At each rotation angle, one sub-pixel group of the naked-eye stereoscopic display device 100 is illuminated each time through the control signals stored in the post-processing device 240, and the sub-pixel groups illuminated at different times are different.

[0101] In order to improve the efficiency, the naked-eye stereoscopic display device 100 can be pre-partitioned, so that the illumination of the sub-pixel groups of each partition is performed in parallel. The post-processing device 240 can store a control signal sequence comprising multiple control signals. At each rotation angle, each control signal in the control signal sequence stored in the post-processing device 240 is sequentially used to control each partition of the naked-eye stereoscopic display device 100 to illuminate one sub-pixel group at the corresponding position, such as multiple sub-pixels in a row or multiple sub-pixels in a column, and the camera 220 captures the image of the image currently displayed by the naked-eye stereoscopic display device 100 to obtain one test image.

[0102] The camera 220 sends the captured test image to the post-processing device 240, the post-processing device 240 synchronously detects or reads the rotation angle of the turntable 210 to obtain the rotation angle of the turntable at the time of capturing the test image, and stores the test image and the rotation angle in association. After the rotation is completed, the post-processing device 240 stores the test results of the naked-eye stereoscopic display device 100, i.e., the test images under each rotation angle.​

[0103] By introducing the post-processing device 240, the storage of the test results is realized, which provides a data basis for the view point assignment based on the test results, and facilitates the management and application of the test results.

[0104] Embodiment Three

[0105] Figure 5 The top view of the test system of the naked-eye stereoscopic display device provided in Embodiment Three of the present application is shown in Figure 2 、 Figure 4 and Figure 5 In this embodiment, the optical element 230 is a triangular prism, which is arranged on the left and right sides of the rotary table 210 respectively, and the camera 220 is located in front of the rotary table 210 and is aligned with the naked-eye stereoscopic display device 100 placed on the rotary table 210. Figure 5 The screen of the naked-eye stereoscopic display device 100 is taken as a curved screen for example.

[0106] Continuing to refer to Figure 5 At a certain rotation angle, the light emitted by the sub-pixels on the naked-eye stereoscopic display device 100 enters the camera 220 after refraction by the triangular prism.

[0107] The triangular prism as the optical element 230 has a lower cost, and the triangular prism does not change the vergence when changing the direction of the light beam, thereby better maintaining the illumination range of the light beam, so that the camera 220 can better capture the image of the lit sub-pixel through the triangular prism.

[0108] Continuing to refer to Figure 5 During the test, the angle of the triangular prism can also be adjusted, such as adjusting the angle of the triangular prism in the clockwise or counterclockwise direction, so as to change the incident angle of the light emitted by the lit sub-pixel to the triangular prism, thereby refracting more light emitted by the lit sub-pixel to the camera 220.

[0109] The rotary table 210 is a double-axis rotary table, including a horizontal rotation shaft 211 and a pitch rotation shaft 212. The naked-eye stereoscopic display device 100 is rotated in the horizontal plane by the horizontal rotation shaft 211, and the rotation direction is d1. The naked-eye stereoscopic display device 100 is rotated in pitch by the pitch rotation shaft 212, and the rotation direction is d2, that is, the pitch rotation shaft 212 is used to adjust the pitch angle of the naked-eye stereoscopic display device 100.

[0110] By the double-axis rotary table, the rotation angle is a two-dimensional rotation angle, so as to fully test the state of the naked-eye stereoscopic display device 100 in various poses, thereby improving the comprehensiveness of the test.

[0111] Embodiment Four Figure 6 The structural schematic diagram of the test system of the naked-eye stereoscopic display device provided in Embodiment Four of the present application is shown in Figure 2 ,Figure 4 and Figure 6 In the embodiment, the optical element 230 is a galvanometer, and the angle and position of the galvanometer can be adjusted.

[0112] At each rotation angle, the galvanometer can scan according to the set scanning mode, so as to reflect or refract the light emitted by the lit sub-pixel to the camera 220 at different positions and / or angles.

[0113] During the test, the galvanometer can be first moved to the vicinity of the surface of the test area of the naked-eye stereoscopic display device 100, and after each sub-pixel is lit, the galvanometer is quickly scanned, and the deflection angle of the galvanometer is continuously adjusted, for example, from -30° to 30° with a step of 1° or 0.5°, so as to reflect the light emitted by the lit sub-pixel.

[0114] In some embodiments, the position (x, y, z) and angle (rx, ry) of the galvanometer can be adjusted, and the set scanning mode can include a pose sequence of the galvanometer, the pose sequence including a plurality of poses of the galvanometer, and each pose being represented by the position and the angle, and being represented as (x, y, z, rx, ry).

[0115] In some embodiments, two galvanometers can be arranged on one side of the turntable, and the two galvanometers are respectively arranged on the upper side and the lower side of the horizontal line where the center of the screen of the naked-eye stereoscopic display device 100 is located.

[0116] The galvanometer as the optical element 230 can improve the collimation of the light beam, thereby reducing distortion and providing imaging quality. Meanwhile, the galvanometer has high-speed scanning capability, and can complete complex and fine scanning within millimeter level by using an internal high-speed swing motor, thereby improving the test efficiency of the test image.

[0117] In the case where the optical element 230 is a galvanometer, the turntable 210 can be a single-axis turntable, and the rotation axis of the single-axis turntable includes a horizontal rotation shaft 211 for driving the naked-eye stereoscopic display device 100 to rotate in the horizontal plane. That is, the naked-eye stereoscopic display device 100 does not need to perform pitching rotation, and the pitching rotation of the naked-eye stereoscopic display device 100 can be replaced by adjusting the pose of the galvanometer, thereby simplifying the control of the naked-eye stereoscopic display device 100 and reducing the test complexity.

[0118] Optionally, the galvanometer includes a vibration system and a lens, the lens can be a mirror or a lens, and is used for reflecting or refracting light, and the vibration system is used for adjusting the position and angle of the lens.

[0119] The scanning mode of the mirror can also be referred to as a vibration mode. The mirror can rotate around a vertical axis, and the whole galvanometer can also move. The vibration system controls the rotation of the mirror and the movement of the whole galvanometer to adjust the scanning mode of the mirror. For example, the angle range and speed of the mirror rotation can be controlled, and the direction, speed and range of the movement of the whole galvanometer can be controlled.

[0120] In order to realize the reflection or refraction of the light emitted by the sub-pixel at the specified position to the camera 220, the target position and target angle of the galvanometer can be determined based on the sub-pixel position, the position of the naked-eye stereoscopic display device 100 relative to the camera 220, and the position of the galvanometer; and the mirror is adjusted to the target position and target angle by the vibration system, so that the light emitted by the sub-pixel at the specified position is reflected or refracted to the camera 220 through the mirror.

[0121] The number of optical elements 230 can be one or more, and can be of the same type or of multiple types. Different optical elements 230 are arranged at different positions and are used to reflect or refract the light emitted by different sub-pixels.

[0122] For example, the optical elements 230 can include at least two of lenses, prisms and galvanometers, such as lenses and prisms, or lenses and galvanometers, or prisms and galvanometers, or lenses, prisms and galvanometers. The number of each type of optical element 230 can be one or more.

[0123] In some embodiments, the position and / or angle of the optical element 230 can be adjusted, which can be manual adjustment or automatic adjustment.

[0124] Optionally, the optical elements 230 are multiple, and the multiple optical elements 230 include a galvanometer and at least one of a prism and a lens; the light emitted by the part of the sub-pixels of the naked-eye stereoscopic display device 100 is reflected or refracted to the camera 220 through the linkage control of the multiple optical elements 230.

[0125] The linkage control of the multiple optical elements 230 can be realized through a control system composed of a controller, a sensor and an actuator. The sensor is used to collect the position and / or angle of each optical element 230, the controller is used to generate a control instruction of the actuator based on the deviation between the position and / or angle collected by the sensor and the expected position and / or angle, and the actuator is used to adjust the position and / or angle of each optical element 230 to approach the expected position and / or angle. The actuator can be a fixed component of the optical element 230, which can be a clamping component, a mechanical arm, etc.

[0126] To control the position and angle of the optical element 230 more accurately, a feedback mechanism can be introduced. Specifically, when the position and angle of the optical element 230 are controllable, the test system further comprises an adjustment module, which comprises an angle sensor, a position sensor, and a controller; the angle sensor and the position sensor are respectively used to detect the position and angle of the lens; the controller is used to generate a control instruction based on the position and angle of the optical element 230 fed back by the angle sensor and the position sensor, so as to adjust the position and angle of the optical element 230. The execution subject of the control instruction can be a fixing assembly for fixing the optical element 230, wherein the fixing assembly is used to adjust the position and angle of the optical element. For a galvanometer, the control instruction can be executed by the galvanometer and a fixing assembly for fixing the galvanometer.

[0127] The controller can be any kind of controller, such as a PID (Proportional-Integral-Derivative) controller, a fuzzy controller, etc.

[0128] The controller adjusts the position and angle of the optical element 230 based on the deviation between the current position and angle of the optical element 230 fed back by the angle sensor and the position sensor, and the target position (the expected value of the position) and the target angle (the expected value of the angle), until the error of the position and angle is within the allowable range, thereby improving the accuracy of the adjustment of the position and angle of the optical element 230.

[0129] To ensure the movement range of the optical element 230, in some embodiments, the optical element 230 can be fixed on a mechanical arm, so that the position and angle of the optical element 230 are adjusted by the mechanical arm, the working range of the optical element 230 is expanded, more light emitted by the lighted sub-pixels is reflected or refracted to the camera 220, the number of images to be acquired during testing is further reduced, and the testing efficiency is improved.

[0130] Optionally, the optical element 230 can be fixed on both sides of the turntable 210 by a fixing assembly. The two sides of the turntable 210 specifically refer to the left and right sides of the turntable 210, and the side of the turntable 210 where the camera 220 is located is the front of the turntable 210.

[0131] Compared with the way of arranging the optical element 230 on one side, the double-sided arrangement increases the working range of the optical element 230, so that more light emitted by the lighted sub-pixels is reflected or refracted to the camera 220 by the optical element 230, the number of rotation angles is further reduced, and the testing efficiency is improved.

[0132] Optionally, the turntable 210 can be a sample table provided with multiple adjustment axes with multiple degrees of freedom, which is used to fix the naked-eye stereoscopic display device 100 to be tested, i.e., a sample. The multiple degrees of freedom of the adjustment axes of the sample table can be multiple degrees of freedom in X, Y, Z, horizontal, pitch, etc.

[0133] Figure 7 A schematic diagram of the optical element layout provided for Embodiment Four is shown in FIG. 4. As shown in FIG. 4, the optical elements 230 in the test system are fixed on the left and right sides of the turntable 210 by fixing assemblies (not shown in FIG. 4), and multiple optical elements 230 can be arranged in the vertical direction on each side. Figure 7 Figure 7 Figure 7 In some embodiments, the angle and / or position of the optical elements 230 can be adjusted by the fixing assemblies, for example, the position of the optical elements 230 can be adjusted by a telescopic structure in the fixing assemblies, and the angle of the optical elements 230 can be adjusted by an inclining structure in the fixing assemblies.

[0134] Optionally, the fixing assemblies are mechanical arms, and the angle and / or position of the optical elements 230 can be adjusted by the mechanical arms at different rotation angles.

[0135] Optionally, the fixing assemblies are mechanical arms, and the angle and / or position of the optical elements 230 can be adjusted by the mechanical arms at different rotation angles.

[0136] Optionally, the fixing assemblies are mechanical arms, and the angle and / or position of the optical elements 230 can be adjusted by the mechanical arms at different rotation angles.

[0137] Correspondingly, the post-processing device 240 is further configured to store the angle and / or position of the optical elements 230 at different rotation angles, so as to determine the light-out angle of the sub-pixel reflected or refracted by the optical elements 230 in the test image based on the angle and / or position of the optical elements 230, and determine the view point of the sub-pixel based on the light-out angle.

[0138] The use of mechanical arms to fix and adjust the posture of the optical elements 230 has high flexibility, fast response speed, and high precision, so that more light beams emitted by the sub-pixels can be propagated to the camera 220 through effective adjustment of the posture (including the angle and position) of the optical elements 230, more sub-pixels in the test image can be lighted, the number of test images to be collected can be reduced, and the test efficiency can be improved.

[0139] Optionally, the test system of the autostereoscopic display device further comprises a sliding rail, and the turntable 210 or the camera 220 can move along the sliding rail to adjust the distance between the camera 220 and the autostereoscopic display device 100 placed on the turntable 210.

[0140] Optionally, the test system of the autostereoscopic display device further comprises a code scanner, and the code scanner is configured to scan an identification code on the autostereoscopic display device 100 to obtain identification information of the autostereoscopic display device 100. Correspondingly, the post-processing device 240 is further configured to store the identification information of the autostereoscopic display device 100 and the test image of the autostereoscopic display device 100 and the corresponding rotation angle in association.

[0141] Embodiment Five​​

[0142] Figure 8 A structural schematic diagram of a test system of the naked-eye stereoscopic display device provided in Embodiment Five is shown in FIG. 5. As shown in FIG. 5, in the embodiment, the test system further includes a slide rail 250, a code scanner 260, and a dark box 270. Figure 8

[0143] The turntable 210 can move towards or away from the camera 220 along the slide rail 250, so as to adjust the distance between the camera 220 and the naked-eye stereoscopic display device 100 placed on the turntable 210, so that the picture captured by the camera 220 covers the naked-eye stereoscopic display device 100, avoiding the situation that the naked-eye stereoscopic display device 100 cannot be completely photographed due to too close distance, and the situation that too far distance causes too many interference factors in the test image.

[0144] The naked-eye stereoscopic display device 100 to be tested is provided with an identification code, such as a bar code or a two-dimensional code, and the code scanner 260 is used to identify the identification code provided on the naked-eye stereoscopic display device 100 to be tested, so as to determine the identification information of the naked-eye stereoscopic display device 100 to be tested, such as a unique identification code or a device number.

[0145] For the batch test scenario, in the post-processing device, the test results of each naked-eye stereoscopic display device 100 can be stored based on the identified identification information, including the test image, the rotation angle corresponding to the test image, and the position and angle of the optical element 230 when the test image is captured.

[0146] In addition, whether the naked-eye stereoscopic display device 100 is accurate can also be determined based on the identified identification information of the naked-eye stereoscopic display device 100.

[0147] In some embodiments, the turntable 210, the camera 220, the optical element 230, the slide rail 250, and the code scanner 260 are all located in the dark box 270, and the post-processing device 240 is located outside the dark box 270, so as to avoid the influence of ambient light on the brightness of the light emitted by the sub-pixels during the test period, i.e., the period when the sub-pixels of the naked-eye stereoscopic display device 100 are lit, and to improve the accuracy of the test.

[0148] An illuminometer can also be provided in the dark box 270 to detect whether the dark box 270 leaks light; if not, the test phase is entered.

[0149] Further, the post-processing device 240 is further configured to execute a view point allocation method based on the test results of the naked-eye stereoscopic display device 100, so as to determine the view points corresponding to each sub-pixel in the pixel array of the naked-eye stereoscopic display device 100.

[0150] For example, the view point allocation method can specifically include:

[0151] ​Based on the test images of the naked-eye stereoscopic display device at multiple rotation angles, the luminance of each sub-pixel of the naked-eye stereoscopic display device 100 at each rotation angle is determined; based on the recorded luminance of each sub-pixel of the naked-eye stereoscopic display device 100 at each rotation angle, the correspondence between the rotation angle and the maximum luminance of the sub-pixel is obtained; for each partition of the naked-eye stereoscopic display device 100, based on the correspondence and the position of the sub-pixel, the position of the center sub-pixel of the partition is determined; the center sub-pixel is aligned with the center of the light splitting unit above it; based on the position of the center sub-pixel determined in each partition, the offset of each sub-pixel in the pixel array relative to the light splitting unit covering the sub-pixel is determined; based on the offset, the corresponding view point of each sub-pixel in the pixel array is determined.

[0152] Further, before the test starts, a series of checks and calibrations need to be performed:

[0153] Close the cabinet door of the dark box 270, close the test sample (the naked-eye stereoscopic display device 100 to be tested), measure the ambient light intensity with a lux meter, check whether there is light leakage phenomenon, for example, whether the ambient light intensity is less than 0.1 lux, if so, it is considered that there is no light leakage phenomenon, and the next step is continued; if there is light leakage phenomenon, an abnormal prompt is given.

[0154] After the light leakage test is passed, the distance between the camera 220 and the test sample is adjusted through the slide rail 250, so that the distance is a preset distance, for example, 1000 millimeters.

[0155] The attitude of the camera 220 is adjusted through the adjusting table, so that the camera 220 and the screen center of the test sample are on the same horizontal line; the focal length of the camera 220 is adjusted, so that the screen center of the test sample can be clearly imaged in the camera; the parameters of the camera 220 are configured, and the test scheme is saved, so that the camera 220 under the test scheme is used for testing the subsequent test sample.

[0156] Based on the code scanner 260, the test sample is scanned to obtain the identification information of the test sample.

[0157] The test sample displays the alignment picture (for example, a cross picture), the camera 220 is used to shoot the test sample, and it is judged whether the screen center is located at the center of the field of view of the camera 220, if not, the turntable 210 is adjusted so that the screen center is located at the center of the field of view of the camera 220.

[0158] After the adjustment, enter the test phase, control the test sample to rotate to the starting angle, and then perform horizontal rotation test. The test sample is driven to rotate horizontally by the horizontal rotation shaft of the turntable 210. At each rotation angle, one or more sub-pixels in each partition of the pixel array of the test sample are sequentially lighted, and the picture after lighting the sub-pixels is captured by the camera 220 to realize the recording of the brightness of the lighted sub-pixels. The rotation angle and the test image are saved to the post-processing device 240. After the horizontal rotation test is completed, the pitch rotation test can also be performed. The test sample is driven to pitch by the pitch rotation shaft of the turntable 210 to obtain the test image at each rotation angle. The rotation angle is continuously adjusted until all the preset rotation angles (including the rotation angles in the horizontal and pitch directions) are tested.

[0159] Based on the test images of the test sample at each rotation angle saved in the post-processing device 240, the brightness of the sub-pixels in each partition of the pixel array of the test sample at each rotation angle is obtained. Based on the correspondence between the maximum brightness of the sub-pixels and the rotation angle, the sub-pixel viewpoint distribution is performed to obtain the calibrated viewpoint corresponding to the sub-pixel.

[0160] For example, the post-processing device 240 can control the rotation of the turntable 210 through a serial port and control the camera 220 to capture images through a network port.

[0161] It should be noted that in this document, the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles, or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles, or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device that includes the element.

[0162] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application. It is intended that the application cover any and all variations of the application that come within the scope of the general inventive concepts and including those that fall within the following claims and their equivalents. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the application indicated by the following claims.

[0163] It should be understood that the application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

Claims

1. A test system for a naked-eye stereoscopic display device, the test system comprising: The application relates to a device for testing naked-eye stereoscopic display devices. The device comprises a rotating table, a camera and an optical element. The rotating table is used to drive the camera or the naked-eye stereoscopic display device to rotate, so that the naked-eye stereoscopic display device rotates relative to the camera. The optical element is used to reflect or refract the light emitted by the part of the sub-pixels of the naked-eye stereoscopic display device that are lighted up to the camera. The camera is used to collect test images of the naked-eye stereoscopic display device at multiple rotation angles, so as to perform viewpoint allocation based on the test images at the multiple rotation angles.

2. The system of claim 1, wherein, The optical element is a three-prism or a lens.

3. The system of claim 1, wherein, The optical element is a galvanometer. At each rotation angle, the galvanometer scans according to a set scanning mode, so as to reflect the light emitted by the lighted-up sub-pixels to the camera at different positions and / or angles.

4. The system of claim 1, wherein, The optical element is multiple, and the multiple optical elements comprise a galvanometer and at least one of a three-prism and a lens.

5. The system of claim 1, wherein, The light emitted by the part of the sub-pixels of the naked-eye stereoscopic display device that are lighted up is reflected or refracted to the camera through linkage control of the multiple optical elements.

6. The system of claim 1, wherein, The device further comprises an adjusting module, which comprises an angle sensor, a position sensor and a controller.

7. The system of claim 6, wherein, The angle sensor and the position sensor are respectively used to detect the position and the angle of the optical element.

8. The system of claim 1, wherein, The controller is used to generate a control instruction based on the position and the angle of the optical element fed back by the angle sensor and the position sensor, so as to adjust the position and the angle of the optical element.

9. The system of claim 1, wherein, The optical element is fixed to the two sides of the rotating table through a fixing assembly.

10. The system of any of claims 1-9, wherein, The fixing assembly is a mechanical arm, which is used to adjust the angle and / or the position of the optical element at each rotation angle. The rotating table is a single-axis rotating table, and its rotating shaft comprises a horizontal rotating shaft, which is used to drive the naked-eye stereoscopic display device to rotate in a horizontal plane. The rotating table is a double-axis rotating table, and its rotating shaft comprises a horizontal rotating shaft and a pitching rotating shaft, which are respectively used to drive the naked-eye stereoscopic display device to rotate in a horizontal plane and to pitch.

11. The system according to any of claims 1-9, characterized in that, The device further comprises a post-processing device.

12. The system of claim 11, wherein, The post-processing device is used to store the test images and the corresponding rotation angles.

13. The system of any of claims 1-9, wherein, One rotation angle corresponds to multiple test images, and the sub-pixels of the naked-eye stereoscopic display device that are lighted up are different when different test images are collected at the same rotation angle.

14. The system of any one of claims 1-9, wherein, The naked-eye stereoscopic display device is divided into multiple sub-zones, and each sub-zone is lighted up by at least one sub-pixel group in one test image. The device further comprises a driver, which is used to light up the sub-pixels of each sub-zone based on the stored driving signals corresponding to the sub-zones. The device further comprises a slide rail, and the camera or the rotating table can move along the slide rail, so as to adjust the distance between the camera and the naked-eye stereoscopic display device placed on the rotating table. The device further comprises a code scanner, which is used to scan an identification code on the naked-eye stereoscopic display device, so as to obtain the identification information of the naked-eye stereoscopic display device.

Images