A multi-layer three-dimensional display integrated testing device and method

Abstract

The application discloses a kind of multilayer three-dimensional display integrated test device and test method, the test device includes bottom rotary sliding table, multi-hole fixed plate, side support, frame, side rotary sliding table, several display devices, several fixed parts;Frame includes innermost layer frame and at least one outer layer frame, and one display device is embedded in the innermost layer frame and all outer layer frames respectively;Back surface of the innermost layer frame is further provided with backlight source;And setting buckle connects the innermost layer frame and outer layer frame as integral frame;The test method is: the angle of rotation of rotary sliding table is controlled to carry out field of view angle test, adjust interlayer spacing to carry out scene depth test, adjust the fixed hole position of device so that the device adapts to different sizes of display layer and the relative deflection of display layer, test display layer size and the influence of pixel relative deflection on display effect.The application realizes the integrated test to multiple performance indexes by a set of test device, which is helpful for the development and application of multilayer three-dimensional display.

Description

Technical Field

[0001] This invention relates to the field of three-dimensional display technology, and in particular to a multi-layer three-dimensional display integration testing device and method. Background Technology

[0002] In recent years, Virtual Reality (VR), Augmented Reality (AR), and the emerging Extended Reality (XR) have demonstrated enormous development demand and potential. As a supporting technology, 3D display technology has received significant attention from academia and industry, leading to the development of various 3D display technologies with different technical approaches. The ultimate goal of 3D display is to enable observers to perceive all depth cues of observed objects as if they were observing the real world, thus providing conditions for natural interaction. Multi-layer 3D display is considered one of the best solutions for 3D display at present. Its system mainly consists of a light source and multiple display layers, featuring a simple structure, mature hardware requirements, and low cost. It can achieve high image quality within a certain field of view and, in principle, does not have resolution limitations, thus achieving a good balance between performance and cost, leading to its rapid development.

[0003] Current research on multi-layer 3D display mainly focuses on early-stage development, and there is still a lack of systematic integrated testing devices for multiple performance indicators. Summary of the Invention

[0004] The purpose of this invention is to propose a multi-layer three-dimensional display integration testing device and method that can realize multi-degree-of-freedom rotation and angle measurement, free and precise adjustment of layer spacing, pixel tilt of multiple display layers, and adapt to display screens of different sizes. The aim is to complete the measurement, testing and research of multiple performance indicators and influencing factors of multi-layer three-dimensional display systems through a single testing device.

[0005] The multi-layer three-dimensional display integrated testing device proposed in this invention adopts the following technical solution:

[0006] A multi-layer three-dimensional display integration testing device includes a bottom rotating slide, a perforated fixing plate on the upper surface of the bottom rotating slide, side supports on both sides of the upper surface of the perforated fixing plate, a frame installed between the two side supports, a side rotating slide installed on the outside of the side supports, and several display devices installed within the frame. The bottom rotating slide rotates to adjust the azimuth angle of the frame; the side rotating slide rotates to adjust the pitch angle of the frame. The frame includes an innermost frame and at least one outer frame, with a gap between the innermost frame and the outer frame, and the gaps between adjacent frames are equal. One display device is embedded in the innermost frame, and one display device is also embedded in each of the outer frames, with multiple display devices arranged in parallel. A backlight is also provided on the back of the innermost frame, located behind the display devices. Buckles are used to connect the innermost frame and the outer frames into a single frame.

[0007] The innermost frame and the outermost frame are designed to run through the front and back to accommodate the opening of the display device. The thickness of the opening is the same as the thickness of the display device, so that when the display device is inserted into the opening, the outer surface of the display device is flat with the outer surface of the frame, ensuring stability after fixing and facilitating accurate measurement of the interlayer spacing.

[0008] The backlight and the innermost display device are fixed to the front and back of the innermost frame, respectively; the side turntable and the bracket are fixed using side turntable fixing parts; and the side bracket and the bottom horizontally placed turntable are fixed using a perforated fixing plate.

[0009] Multi-degree-of-freedom angular rotation is achieved using a rotating slide. The rotation of the side rotating slide adjusts the pitch angle of the frame, while the rotation of the bottom horizontally placed rotating slide adjusts the azimuth angle of the frame. The combined control of the two rotating slides allows for the testing of the field of view.

[0010] The buckle has several grooves on one side edge for embedding into the frame. One groove is embedded into the innermost frame, and the other grooves are embedded into the outer frame. The gap between the grooves is adjusted according to the layer spacing requirements, and multiple sets of buckles with different gap sizes are made. Each set of buckles has at least 6 buckles.

[0011] The accurate value of the interlayer spacing is obtained by adding the width of the gap between adjacent grooves to the width of an outer groove. The interlayer spacing can be adjusted, measured, and the frame fixed by changing the clips with different gap sizes.

[0012] Several fixing holes are provided on the side bracket, and the height of the frame can be adjusted by adjusting the holes used by the side fixing rod; a long slot is provided on the bracket base to align with the holes at different positions on the multi-hole fixing plate so that the device can adapt to display layers of different lengths.

[0013] Multiple holes are provided at the four corners of each frame layer for the frame fixing rods to pass through. The method for selecting the hole positions is to draw a circle with the center of the frame as the center and a radius slightly smaller than the distance from the center of the frame to the four corners.

[0014] As required, holes were drilled at the intersection of the circle and the frame, which not only enabled the relative deflection of the individual frame layer and the display layer and the fixation after deflection, but also facilitated the measurement of the relative deflection angle.

[0015] This invention also provides a multi-layer three-dimensional display integration testing method using the above-mentioned multi-layer three-dimensional display integration testing device, employing the following technical solution:

[0016] The testing method specifically includes the following steps:

[0017] (1) Fix the backlight to the back of the innermost frame;

[0018] (2) After determining the number of display layers required for the test, each display device is embedded in the frame, and then the light rod is inserted into the opening of the frame to initially fix the frame. After fixing each display layer controller, it is connected to the computer.

[0019] (3) Select appropriate gap size buckles according to the required layer spacing to lock the four sides of the frame, completely fix the frame, and carry out scene depth related tests;

[0020] (4) Set the rotation angles of the side rotating slide and the bottom horizontally placed rotating slide to realize the pitch angle and azimuth angle adjustment of the frame respectively; use the controller or computer software to jointly control the two rotating slides and carry out field of view related tests.

[0021] (5) Rotate the frame around an axis perpendicular to the surface of the innermost frame or an outer frame, and fix it through the pre-drilled holes at the four corners of the frame to test the effect of the relative deflection of the display device in the frame.

[0022] (6) The four-dimensional light field of the scene is rendered by computer and compressed into a multi-layer image. The image is sent to the corresponding display device through multiple controllers connected to the computer and the displayed image is captured for testing.

[0023] The advantages of this invention are that it achieves precise integrated testing of multiple performance indicators of a multi-layer 3D display system using a relatively simple structure and devices. The use of a rotating slide allows for changes in the field of view by adjusting its rotation angle. Compared to traditional testing methods that require changing the observer's position to obtain images from different viewpoints, the device provided by this invention avoids various errors caused by changes in the observer's position, facilitating more accurate testing of the field of view. The use of snap-fit ​​mechanisms also simplifies the adjustment of the interlayer spacing, avoiding overly complex adjustment mechanisms, reducing structural complexity, and decreasing the workload and errors associated with adjusting and measuring the interlayer spacing, thus facilitating more accurate testing of scene depth. The additional pre-reserved openings on the frame make it easier for researchers to achieve angular deflection of a display layer around an axis perpendicular to the display device surface, resulting in pixel tilting of that display layer, thereby mitigating the influence of moiré fringes and improving the performance indicators of the multi-layer 3D display. Finally, the additional holes and larger base slots on the side brackets allow the device to accommodate more display layer sizes, leaving room for future research on other factors affecting performance indicators. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the overall structure of the multi-layer three-dimensional display integrated testing device, where Figure 1(a) is the left rear side view and Figure 1(b) is the right front side view;

[0025] Figure 2 is a schematic diagram of the display device and its mounting frame in Figure 1, wherein Figure 2(a) is a front view of the basic frame structure, Figure 2(b) is a schematic diagram of the innermost frame, and Figure 2(c) is a schematic diagram of the outer frame.

[0026] Figure 3 This is a schematic diagram of the fixing buckle 4 in Figure 1;

[0027] Figure 4 This is a schematic diagram of the controller mounting component 9 in Figure 1;

[0028] Figure 5 is a schematic diagram of the side support in Figure 1, where Figure 5(a) is the side support 51 connected to the side rotating slide 7, and Figure 5(b) is the other side support 52;

[0029] Figure 6 This is a schematic diagram of the fixing rod 10 used to connect the frame in Figure 1;

[0030] Figure 7 This is a schematic diagram of the fixing component 11 of the side rotating slide in Figure 1;

[0031] Figure 8 This is a schematic diagram of the side bracket fixing component in Figure 1. Specific implementation methods

[0032] This invention provides a multi-layer three-dimensional display integration testing device and method, which will be further described below with reference to the accompanying drawings.

[0033] The multi-layer three-dimensional display integrated testing device proposed in this invention is shown in Figure 1. Its structure includes: a backlight 1, an innermost frame 21 and an outer frame 22, a multi-layer display device 3, a buckle 4, side brackets 51 and 52, a perforated fixing plate 6, a side rotating slide 7, a bottom rotating slide 8, a controller fixing component 9, a frame fixing rod 10, a side turntable fixing component 11, a side bracket fixing rod 12, and a bearing 13.

[0034] The multilayer display device 3 used in this invention is a liquid crystal display (LCD) panel. To jointly modulate the multilayer panel, the backlight module needs to be removed, retaining only the liquid crystal layer, polarizer, glass substrate, transparent conductive layer, thin-film transistor, color filter, and other display modules. A high-brightness, uniform backlight is used as the input light source. By modulating the light transmittance of each LCD layer, the image of each layer is displayed. After combining multiple layers, three-dimensional display can be achieved.

[0035] The display layer typically consists of two to five layers, meaning two to five liquid crystal display panels are arranged at intervals. Theoretically, the more layers there are, the more significant the improvement in 3D display performance. However, too many layers increase algorithm complexity and hardware costs. Therefore, this example uses three display layers (i.e., three liquid crystal display panels arranged at intervals). Two rotary slides are used in this example. For precise adjustment and control, both rotary slides are motorized, and the rotation angle, rotation speed, and number of cycles can all be adjusted via a controller or computer software.

[0036] In this example, Figure 2 shows the structure of the display layer frame. Both the innermost and outermost frames have openings through which the display device 3 is embedded, and the thickness of these openings is the same as the thickness of the display device 3. Two holes are provided at each of the four corners of the frame, allowing for free insertion and sliding of the fixing rod 10 during normal use. When it is necessary to deflect a certain display layer, this can be easily achieved by appropriately adjusting the connected holes. The deflection angle can be calculated using the holes, or the holes can be accurately designed during the design phase based on the required angle information. This allows for the study of the impact of pixel deflection on moiré fringes.

[0037] In this example, as can be seen from Figures 2(b) and (c), the outer frame 22 is thinner and has a simpler structure, thereby reducing structural complexity and weight; the innermost frame 21 is slightly thicker, with components extending backward on both sides, and holes 14 on the components, which are used to connect and fix related structures with the side turntable fixing component 11 and the side bracket fixing component 12. In addition, some small holes 15 are left as fixing holes for the light source.

[0038] In this example, the structure of side brackets 51 and 52 is shown in Figure 5. Figure 5(a) shows the side bracket 51 fixed to the side turntable 7, which is connected to the frame using the side turntable fixing member 11. Figure 5(b) shows the other side bracket 52, which is connected to the frame using the side bracket fixing member 12. Three holes 14 are provided on each side bracket, and bearings 13 are embedded inside them. Fixing members 11 and 12 pass through the bearings, thereby increasing the stability of the fixing members 11 and 12 inside the holes 14 and the smoothness of the frame rotation. The bottom of both brackets is connected to the perforated fixing plate by screws. The bottom of the side bracket 52 has a large slot, which can correspond to the opening positions of more perforated fixing plates. Using it in combination with the three holes of different heights on the two side brackets allows the device to adapt to display layers of different sizes, increasing the possibility of adapting the device to more test content.

[0039] In this example, the controller fixing part 9 is as follows: Figure 4As shown, it is made into an "L" shaped workpiece with two threaded holes for connecting to the frame and two slots for connecting to the mounting holes in the display layer controller. The longer slots also increase the applicability of the fastener to controllers of more sizes.

[0040] In this example, the side rotating slide fixing component 11 is as follows: Figure 7 As shown, the side rotating slide 7 is fixed to the side bracket 51. The surface disc covers the rotating slide table, which serves to protect, fix and use the table rotation to drive the frame to achieve pitch adjustment. The bottom rotating slide 8 is fixed to the bottom of the perforated fixing plate 6 by screws.

[0041] In this example, both the frame fixing rod 10 and the side bracket fixing rod 12 are in the form of a smooth rod with a partial threaded rod. The threaded rod part is used to connect and fix with the nut, which can be used to fix the fixing rod to the innermost frame 21, or to fix it to the light source to increase stability. It can also be extended to fix other structures. The smooth rod part is for easy adjustment.

[0042] In this example, the fixing buckle 4 is made of acrylic sheet. This material is lightweight, easy to process, and has a certain degree of elasticity, which makes it easy to lock the frame. The minimum spacing 'a' between adjacent grooves in the plastic buckle ranges from 20mm to 40mm and is made in groups of 0.5mm intervals, which indicates the layer spacing. A total of 41 groups of buckles are made, with 6 buckles in each group.

[0043] Based on this, the present invention also proposes a multi-layer three-dimensional display integration testing method using the aforementioned multi-layer three-dimensional display integration testing device. Multiple degrees of freedom can be adjusted by changing the rotation angle of the rotating slide; the layer spacing can be changed and fixed by using buckles of different sizes; and a single display layer can be deflected at a certain angle by changing the position of the hole through which the light rod passes. The specific steps are as follows:

[0044] (1) Fix the light source to the controller fixing piece 9 at the back of the innermost frame;

[0045] (2) The three-layer display device 3 is embedded in the innermost frame 21 and the outer frame 22 respectively. The frame fixing rod 10 is inserted into the opening of the frame to initially fix the frame. The controllers of each display layer are fixed in the slot of the controller fixing piece 9. Then the controllers are connected to the computer.

[0046] (3) Select appropriate-sized plastic clips 4 according to the required layer spacing to lock the four sides of the frame. Use two clips on each of the two long sides and one clip on each of the two short sides to completely fix the frame. When it is necessary to adjust the layer spacing, simply remove all the clips, replace them with a new set of clips as needed, and move the outermost two frames to the grooves of the new set of clips. This facilitates scene depth-related tests. The layer spacing can be obtained by adding the thickness of the outer frame to the protruding part inside the clips. Figure 3 The distance a in the figure is shown;

[0047] (4) Adjust the rotation angle of the side rotating slide 7 as needed to achieve the pitch angle adjustment of the frame; fix the frame to the perforated fixing plate 6 through the side support, place the rotating slide 8 horizontally below the perforated fixing plate 6, and adjust the azimuth angle by adjusting the rotation angle of the bottom rotating slide 8; jointly control the two rotating slides to carry out field of view related tests.

[0048] (5) Rotate a display layer around an axis perpendicular to the surface of the display layer as needed, and fix it through the pre-reserved openings at the four corners of the frame to test the effect of the relative deflection of the display layer;

[0049] (6) The four-dimensional light field of the scene is rendered by computer and compressed into a multi-layer image. The image is sent to the corresponding display device through multiple controllers connected to the computer and the displayed image is captured for testing.

[0050] It should be noted that this example is merely a further detailed description of the testing apparatus and method of the present invention and is not intended to limit the scope of protection of the present invention. Researchers in related fields can make appropriate modifications and improvements according to their own research needs after studying the claims, specification, and drawings of the present invention. Therefore, anything within the principles, scope, and spirit established by the claims should be considered within the scope of protection of the present invention.

Claims

1. A multi-layer three-dimensional display integrated testing device, characterized in that, The testing device includes a bottom rotating slide, a perforated fixing plate located on the upper surface of the bottom rotating slide, side brackets located on both sides of the upper surface of the perforated fixing plate, a frame installed between the two side brackets, a side rotating slide installed on the outside of the side brackets, several display devices installed in the frame, and several fixing components. The azimuth angle of the bottom rotating slide adjustment frame; the pitch angle of the side rotating slide adjustment frame; The frame includes an innermost frame and at least one outer frame. There is a gap between the innermost frame and the outer frame, and the gap between adjacent frames is equal. A display device is embedded in the innermost frame, and a display device is also embedded in each of the outer frames. The multiple display devices are arranged in parallel. A backlight is also provided on the back of the innermost frame, located behind the display device. And a buckle is provided to connect the innermost frame and the outer frames into a whole frame. Multiple holes are provided at the four corners of each frame layer for the frame fixing rods to pass through. The hole selection method is to draw a circle with the frame center as the center and a radius slightly smaller than the distance from the frame center to the four corners. Holes are made at the intersection of the circle and the frame as required, which realizes the relative deflection of a single frame layer and the display layer and the fixation after deflection, while also facilitating the measurement of the relative deflection angle.

2. The multi-layer three-dimensional display integrated testing device according to claim 1, characterized in that, The innermost frame and the outermost frame are designed to run through the front and back to accommodate the opening of the display device. The thickness of the opening is the same as the thickness of the display device, so that when the display device is inserted into the opening, the outer surface of the display device is flat with the outer surface of the frame, ensuring stability after fixing and facilitating accurate measurement of the interlayer spacing.

3. The multi-layer three-dimensional display integrated testing device according to claim 1, characterized in that, The backlight and the innermost display device are fixed to the front and back of the innermost frame, respectively; the side rotating slide and the side bracket are fixed using side turntable fixing parts; and the side bracket and the bottom rotating slide are fixed using perforated fixing plates.

4. The multi-layer three-dimensional display integrated testing device according to claim 1, characterized in that, Multi-degree-of-freedom angular rotation is achieved using a rotating slide. The rotation of the side rotating slide adjusts the pitch angle of the frame, while the rotation of the bottom horizontally placed rotating slide adjusts the azimuth angle of the frame. The combined control of the two rotating slides allows for the testing of the field of view.

5. The multi-layer three-dimensional display integrated testing device according to claim 1, characterized in that, The same side edge of the buckle is provided with several grooves for embedding into the frame. One groove is embedded into the innermost frame, and the other grooves are embedded into the outer frame one by one. The gap between the grooves is adjusted according to the layer spacing requirements, and multiple sets of buckles with different gap sizes are made. Each set of buckles has at least 6 buckles.

6. The multi-layer three-dimensional display integrated testing device according to claim 5, characterized in that, The accurate value of the interlayer spacing is obtained by adding the width of the gap between adjacent grooves to the width of an outer groove. The interlayer spacing can be adjusted, measured, and the frame fixed by changing the clips with different gap sizes.

7. The multi-layer three-dimensional display integrated testing device according to claim 1, characterized in that, Several fixing holes are provided on the side bracket, and the height of the frame can be adjusted by adjusting the holes used by the side fixing rod; a long slot is provided on the bracket base to align with the holes at different positions on the multi-hole fixing plate so that the device can adapt to display layers of different lengths.

8. A multi-layer three-dimensional display integration testing method using any one of the multi-layer three-dimensional display integration testing apparatuses of claims 1 to 7, characterized in that, The testing method specifically includes the following steps: (1) Fix the backlight to the back of the innermost frame; (2) After determining the number of display layers required for the test, each display device is embedded in the frame, and then the light rod is inserted into the opening of the frame to initially fix the frame. After fixing each display layer controller, it is connected to the computer. (3) Select buckles with appropriate gap sizes according to the required interlayer spacing to lock the four sides of the frame, completely fix the frame, and carry out scene depth related tests; (4) Set the rotation angles of the side rotating slide and the bottom horizontally placed rotating slide to realize the pitch angle adjustment and azimuth angle adjustment of the frame respectively; use the controller and computer software to jointly control the two rotating slides and carry out field of view related tests. (5) Rotate the frame around an axis perpendicular to the surface of the innermost frame or an outer frame, and fix it through the pre-drilled holes at the four corners of the frame to test the effect of the relative deflection of the display device in the frame. (6) The four-dimensional light field of the scene is rendered by computer and compressed into a multi-layer image. The image is sent to the corresponding display device through multiple controllers connected to the computer and the image is captured for testing.

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