Stereoscopic display device, test method and test apparatus based on a light splitting device

Abstract

The embodiment of the application discloses a kind of based on the stereoscopic display equipment of light splitting device, test method and testing device, which includes: display panel and light splitting device, the distance between the display panel and the light splitting device is less than the focal length f of the light splitting device, the distance from the focal point of the light splitting device to the display panel is configured as 0.4f-0.6f, so that the luminance variation of stereoscopic display equipment when viewed at different angles is within the preset range.

Description

[0001] The present application claims priority to the Chinese patent application No. 202110671609.1, filed on June 17, 2021, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of naked eye 3D (3-dimensional) display, for example to a stereoscopic display device based on a light splitting device, a testing method and a testing apparatus. BACKGROUND

[0003] In the technology of naked eye 3D achieved by a light splitting device, a lenticular lens is generally overlaid on a pixel panel of a mobile phone to achieve the effect of naked eye 3D. However, since the pixels of a matrix array display such as an LCD (Liquid Crystal Display) or an LED (Light Emitting Diode) display are not closely arranged, there is a gap between adjacent pixels, which is generally black and does not emit light. Due to the existence of the black area, the brightness of the screen viewed by a user at different angles changes, so when the mobile phone is shaken, the change of brightness gives a person a feeling of dazzling, which reduces the user experience. SUMMARY

[0004] In embodiments of the present application, a stereoscopic display device based on a light splitting device, a testing method and a testing apparatus are provided.

[0005] In a first aspect, embodiments of the present application provide a stereoscopic display device based on a light splitting device, the device comprising:

[0006] a display panel and a light splitting device, the distance between the display panel and the light splitting device being less than the focal length f of the light splitting device, and the distance from the focal point of the light splitting device to the display panel being configured as 0.4f-0.6f, so that the brightness change of the stereoscopic display device when viewed at different angles is within a preset range.

[0007] In a second aspect, embodiments of the present application provide a testing method for a stereoscopic display device based on a light splitting device, the method being used for producing a stereoscopic display device based on a light splitting device, and comprising:

[0008] adjusting the distance from the focal point of the light splitting device of a current width placed in parallel in front of the display panel to the display panel to obtain at least one candidate distance;

[0009] determining the brightness values of at least two detection angles when performing brightness detection towards the light splitting device of the current width at each candidate distance;

[0010] The distance screening module is configured to screen a candidate distance with a brightness difference within a preset range from the at least one candidate distance as a target distance according to the brightness values of the at least two detection angles under different candidate distances, and the stereoscopic display device based on the light splitting device and the display panel is produced.

[0011] In a third aspect, the embodiment of the present application further provides a testing device for stereoscopic display based on a light splitting device, which comprises:

[0012] The distance adjusting module is configured to adjust the distance from the focal point of the light splitting device with the current width to the display panel to obtain at least one candidate distance.

[0013] The brightness detecting module is configured to determine the brightness values of at least two detection angles when the brightness is detected towards the light splitting device with the current width under each candidate distance.

[0014] The distance screening module is configured to screen a candidate distance with a brightness difference within a preset range from the at least one candidate distance as a target distance according to the brightness values of the at least two detection angles under different candidate distances, and the stereoscopic display device based on the light splitting device and the display panel is produced.

[0015] The above summary of the application is only a summary of the embodiments of the present application, in order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the specification, and in order to enable the above and other purposes, features and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the drawings. The drawings are only for the purpose of illustrating embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to refer to the same or like parts. In the drawings:

[0017] Figure 1 is a schematic diagram of a stereoscopic display device based on a light splitting device provided by the first embodiment of the present application;

[0018] Figure 2 is a schematic diagram of a stereoscopic display of a light splitting device under different angles of a candidate distance provided by the embodiment of the present application;

[0019] Figure 3 is another schematic diagram of a stereoscopic display of a light splitting device under different angles of a candidate distance provided by the embodiment of the present application;

[0020] Figure 4 is a flowchart of a testing method for a stereoscopic display device based on a light splitting device provided by the second embodiment of the present application;

[0021] Figure 5 is a schematic diagram of a stereoscopic display of a light splitting device at different angles of a target distance provided by Embodiment Two of the present application;

[0022] Figure 6 is a statistical diagram of a stereoscopic display of a light splitting device at different angles of a target distance provided by Embodiment Two of the present application;

[0023] Figure 7 is a structural schematic diagram of a test device of a stereoscopic display device based on a light splitting device provided by Embodiment Three of the present application. DETAILED DESCRIPTION

[0024] The present application will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0025] Before the example embodiments are discussed in more detail, it should be mentioned that some example embodiments are described as processes or methods depicted as flow diagrams. Although the flow diagrams describe the operations (or steps) as sequential processes, many of the operations can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The processes can be terminated when their operations are completed, but can also have additional steps not included in the figures. The processes can correspond to methods, functions, routines, subroutines, subprograms, etc.

[0026] Embodiment One

[0027] Figure 1 is a schematic diagram of a stereoscopic display device based on a light splitting device provided by Embodiment One of the present application.

[0028] The stereoscopic display device based on a light splitting device includes a display panel 110 and a light splitting device 120, the distance between the display panel and the light splitting device is less than the focal length f of the light splitting device, and the distance d from the focal point of the light splitting device to the display panel is configured as 0.4f-0.6f, so that the brightness change of the stereoscopic display device when viewed at different angles is within a preset range.

[0029] At present, in the technology of realizing stereoscopic display based on a light splitting device and a display panel, the realization of a naked-eye 3D mobile phone is usually to complete the stereoscopic display by covering the light splitting device on the pixel display panel. The light splitting device here can generally be a cylindrical lens grating. However, there is a black interval between the display panel pixels of the LCD and LED display. For example, Figure 1As shown, when the pixels of the display panel are magnified by the lenticular lens, the black intervals between the pixels are also magnified. Due to the existence of the black intervals, the brightness of the screen viewed by the user at different angles varies, Figure 1 where d represents the distance from the focal point of the lenticular lens to the display panel. As shown in Figure 2 and Figure 3 As shown, the proportion of the black intervals in the magnified part of the display panel at different angles is different for a single lenticular lens, and thus, after magnification, the color composition at different angles can be different, resulting in a flickering situation.

[0030] As shown in Figure 2 and Figure 3 As shown, Figure 2 the distance from the focal point of the lenticular lens to the display panel in the case of Figure 3 is 0.2f (f is the focal length of the lenticular lens), Figure 2 and Figure 3 It can be seen from Figure 2 that if the distance d, i.e., the distance from the focal point of the lenticular lens to the display panel, changes, the magnification ratio of the lenticular lens to the pixels and the black intervals on the display panel is different. In the six observation directions, Figure 3 the first and fourth directions from top to bottom in the case of are the magnified regions of the invalid non-emitting intervals, so the light seen is very dark, while the other directions are the magnified regions of the emitting pixels, so they are relatively bright. In the case of

[0031] , the first, third, fourth, and sixth directions from top to bottom are the magnified regions of the pixels containing the black non-emitting intervals, so the light seen is relatively dark. Figure 1 As shown, the distance d from the focal point of the light splitting device to the display panel can be configured to be 0.4f-0.6f, so that the brightness variation of the stereoscopic display device when viewed at different angles is within a preset range.

[0032] In an embodiment, the distance d from the focal point of the light splitting device to the display panel can be configured to be 0.4f-0.5f.

[0033] In an embodiment, the distance d from the focal point of the light splitting device to the display panel can be configured to be 0.5f.

[0034] Embodiment Two

[0035] Figure 4is a flowchart of a testing method of a stereoscopic display device based on a light splitting device provided in Embodiment Two of the present application. The method can test the stereoscopic display device based on the light splitting device provided in Embodiment One. The method can be executed by a testing device for the stereoscopic display device based on the light splitting device. The device can be implemented by software and / or hardware, and can be integrated into an electronic device. As shown in Figure 4 The testing method of the stereoscopic display device based on the light splitting device in the present embodiment includes the following steps:

[0036] S410, adjusting the distance from the focal point of the light splitting device with the current width placed in parallel in front of the display panel to the display panel to obtain a candidate distance.

[0037] From the observation results of Figure 2 and Figure 3 It is found that by testing the change of the distance from the focal point of the lenticular lens to the display panel, the display panel can be placed at a suitable focal length position, so that the influence of the black interval in different directions remains basically the same, thereby avoiding the situation of eye strain caused by brightness change.

[0038] The display panel can be a matrix array display such as an LCD or LED display screen, and the light splitting device can be a lenticular lens. The naked eye 3D effect is achieved through the lenticular lens, and the width of a single lenticular lens is fixed. The adjustment of the distance from the focal point of the lenticular lens to the display panel can be represented by the multiple of the focal length. For example, the range of the candidate distance can be selected as 0.1f-f, and each adjustment increases by 0.1f. In this case, 10 candidate distances can be generated.

[0039] In one scheme of the present embodiment, it can be combined with one or more schemes in the present embodiment. At least two luminance sensors are provided at at least two preset angles in front of the light splitting device with the current width.

[0040] The detection of the luminance at the at least two detection angles can be performed by setting the luminance sensors at different angles.

[0041] S420, determining the luminance values of the at least two detection angles when the luminance is detected towards the light splitting device with the current width at the candidate distance.

[0042] As shown in Figure 2 and Figure 3 As shown in the examples, the direction perpendicular to the display panel is 0°, and the six directions are -30°, -20°, -10° and 10°, 20°, 30° at the candidate distances of 0.2f and 0.33f. The detection angles can be redefined and set. The more the detection angles are set, the more accurate the determination of the luminance change at the candidate distance can be.

[0043] S430, filtering a candidate distance with a brightness difference within a preset range from the at least one candidate distance as a target distance according to the brightness values of the at least two detection angles under different candidate distances, for producing the stereoscopic display device based on the light splitting device and the display panel.

[0044] The preset range of the brightness difference can be a brightness difference value between different detection angles less than 5%, and a distance with a brightness difference within the preset range is found from the candidate distances as the target distance, and the stereoscopic display device based on the light splitting device is produced according to the target distance.

[0045] In one scheme of the embodiment, the scheme can be combined with one or more schemes in the embodiment. The filtering of a candidate distance with a brightness difference within a preset range from the at least one candidate distance as a target distance according to the brightness values of the at least two detection angles under different candidate distances can include steps A1-A2.

[0046] Step A1, recording a brightness value change trend of the current width of the light splitting device at the at least two detection angles under different candidate distances.

[0047] For example, the brightness value change trend can refer to a difference value between the brightness values of the at least two detection angles under the same candidate distance.

[0048] Step A2, determining a candidate distance with a minimum brightness value change trend from the different candidate distances as the target distance.

[0049] The brightness value change trend of the current width of the light splitting device between the set detection angles is recorded, and a candidate distance with a minimum brightness value change trend is selected as the target distance. As shown in Figure 5 When the cylindrical lens width (the current width of the light splitting device) covers two pixels, it can be found that when the distance d is 0.5f, the brightness influence of the black interval on different angles is consistent. The observation angle in Figure 5 is further expanded, and the size of the black interval after the expansion in the observation area is counted for each observation angle, as shown in Figure 6 When the candidate distance is 0.5f, the proportion of the black interval of the multiple observation angles is always 20%, so there is no light and dark change when viewed from different angles.

[0050] The constant proportion of the black interval can be understood as a constant when the area proportion of the black interval in the observation area is constant when observed from different observation angles. When the observation angle is changed, the area proportion still maintains the constant before.

[0051] In an implementation of the embodiment, one or more of the solutions in the embodiment can be combined. In the case of determining the candidate distance, the preset sensor distance between the at least two sensors and the light splitting device of the current width is changed; and the preset sensor distance with the minimum brightness value change trend under at least two preset sensor distances is recorded.

[0052] In an implementation of the embodiment, one or more of the solutions in the embodiment can be combined. In the case of determining the candidate distance, the preset sensor distance between the at least two sensors and the light splitting device of the current width is changed; and the preset sensor distance with the minimum brightness value change trend under at least two preset sensor distances is recorded.

[0053] Step B1, sending an observation instruction to an observer under the target distance, the observation instruction being used to instruct the observer to observe the stereoscopic display result at the at least two detection angles.

[0054] Step B2, receiving the stereoscopic display observation result of the observer at the at least two detection angles.

[0055] Step B3, screening an actual target distance from the target distance according to the stereoscopic display observation result.

[0056] In the case of the target distance, in the case of meeting the minimum brightness change trend of each detection angle, since the light splitting device realizes the naked-eye 3D display characteristic, there may be a target distance in the target distance that cannot realize the stereoscopic display. Therefore, the observer needs to actively observe the stereoscopic display result to eliminate the target distance that cannot realize the stereoscopic display from the target distance set, and screen the actual target distance that can realize the stereoscopic display.

[0057] In the embodiment, the distance from the focal point of the light splitting device of the current width placed in parallel in front of the display panel to the display panel is adjusted to obtain a candidate distance; the brightness values of at least two detection angles when the brightness is detected toward the light splitting device of the current width under the candidate distance are determined; and a candidate distance with a brightness difference within a preset range is screened from at least one candidate distance as a target distance according to the brightness values of at least two detection angles under different candidate distances, which is used to produce a stereoscopic display device based on the light splitting device and the display panel, and can achieve the technical effect of avoiding the eye-shaking caused by the brightness change when viewing the naked-eye 3D display panel realized by the light splitting device at different angles, and improving the user experience.

[0058] By adjusting the distance from the focal point of the current-width light splitting device to the display panel, a candidate distance is obtained, so that the pixel proportion passing through the light splitting device changes, and then the luminance values of at least two detection angles are detected, and the candidate distance corresponding to the angle pair with the minimum luminance difference or luminance change trend between different angles is found out from the luminance values of the at least two angles as the target distance, and the stereoscopic display device based on the light splitting device is produced according to the target distance, so that the eye-shaking situation caused by luminance change when viewing the naked-eye 3D display panel implemented by the light splitting device at different angles can be avoided, and the technical effect of improving user experience is achieved.

[0059] Embodiment Three

[0060] Figure 7 is a structural schematic diagram of a test device for a stereoscopic display device based on a light splitting device provided by Embodiment Three of the present application. The device can test the stereoscopic display device based on the light splitting device, and can be realized by software and / or hardware and integrated in an electronic device. The device is used to implement the test method for the stereoscopic display based on the light splitting device provided by the above-embodiments. As shown in Figure 7 The test device for the stereoscopic display based on the light splitting device provided in the embodiment includes:

[0061] The distance adjustment module 710 is configured to adjust the distance from the focal point of the current-width light splitting device placed parallel to the display panel to the display panel to obtain at least one candidate distance.

[0062] The luminance detection module 720 is configured to determine the luminance values of at least two detection angles when performing luminance detection toward the current-width light splitting device under each candidate distance.

[0063] The distance screening module 730 is configured to screen a candidate distance with a luminance difference within a preset range from the at least one candidate distance as a target distance according to the luminance values of the at least two detection angles under different candidate distances, and use the target distance to produce a stereoscopic display device based on the light splitting device and the display panel.

[0064] On the basis of the above-mentioned embodiments, in an embodiment, the distance adjustment module 710 includes a sensor arrangement unit configured to:

[0065] At least two luminance sensors are arranged at at least two preset angles in front of the current-width light splitting device.

[0066] On the basis of the above-mentioned embodiments, in an embodiment, the distance screening module 730 includes a trend recording unit configured to:

[0067] Record the luminance value change trend of the current-width light splitting device at the at least two detection angles under different candidate distances.

[0068] determining a candidate distance with the minimum luminance value change trend from the different candidate distances as the target distance.

[0069] On the basis of the above-mentioned embodiments, in an embodiment, the distance screening module 730 is configured to:

[0070] sending an observation instruction to an observer under the condition of the target distance, the observation instruction being used to instruct the observer to observe the stereoscopic display result at the at least two detection angles respectively;

[0071] receiving the stereoscopic display observation result of the observer at the at least two detection angles;

[0072] screening an actual target distance from the target distance according to the stereoscopic display observation result.

[0073] The testing device for the stereoscopic display device based on the light splitting device provided in the embodiments of the present application can execute the testing method for the stereoscopic display device based on the light splitting device provided in any of the embodiments of the present application, and has the corresponding functions and advantages of executing the testing method for the stereoscopic display device based on the light splitting device. The detailed process can refer to the related operations of the testing method for the stereoscopic display device based on the light splitting device in the foregoing embodiments.

[0074] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] The above are only some embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the inventive concept, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A stereoscopic display device based on a beam splitter, comprising a display panel and a beam splitter, wherein the distance between the display panel and the beam splitter is less than the focal length f of the beam splitter, and the distance from the focal point of the beam splitter to the display panel is configured to be 0.4f-0.6f, so that the brightness variation of the stereoscopic display device when viewed from different angles is within a preset range; in, The testing methods for stereoscopic display devices based on beam splitters include: The distance from the focal point of the beam splitter, which is placed parallel to the display panel at the current width, to the display panel is adjusted to obtain at least one candidate distance; Determine the brightness values ​​at at least two detection angles when performing brightness detection towards the beam splitter of the current width at each candidate distance; Based on the brightness values ​​of at least two detection angles at different candidate distances, candidate distances with brightness differences within a preset range are selected from the at least one candidate distance as target distances for the production of stereoscopic display devices based on beam splitting devices and display panels.

2. The device according to claim 1, wherein, The distance from the focal point of the beam splitter to the display panel is 0.4f-0.5f.

3. The device according to claim 2, wherein, The distance from the focal point of the beam splitter to the display panel is 0.5f.

4. A testing method for a stereoscopic display device based on a beam-splitting device, used to produce the stereoscopic display device based on a beam-splitting device as described in any one of claims 1-3, the method comprising: The distance from the focal point of the beam splitter, which is placed parallel to the display panel at the current width, to the display panel is adjusted to obtain at least one candidate distance; Determine the brightness values ​​at at least two detection angles when performing brightness detection towards the beam splitter of the current width at each candidate distance; Based on the brightness values ​​of at least two detection angles at different candidate distances, candidate distances with brightness differences within a preset range are selected from the at least one candidate distance as target distances for the production of stereoscopic display devices based on beam splitting devices and display panels.

5. The method according to claim 4, wherein, At least two brightness sensors are provided at at least two preset angles in front of the beam splitter of the current width.

6. The method according to claim 4, wherein, Based on the brightness values ​​at at least two detection angles under different candidate distances, candidate distances with brightness differences within a preset range are selected from the at least one candidate distance as target distances, including: Record the brightness value variation trend of the current width of the beam splitter at at least two detection angles under different candidate distances; Among the different candidate distances, the candidate distance with the smallest trend of brightness value change is determined as the target distance.

7. The method according to claim 4, after selecting candidate distances with brightness differences within a preset range from the at least one candidate distance based on the brightness values ​​of at least two detection angles at different candidate distances as the target distance, includes: Under the condition of the target distance, an observation command is sent to the observer, which instructs the observer to observe the stereo display result from at least two detection angles. Receive the stereoscopic observation results from the observer at at least two detection angles; The actual target distance is selected from the target distances based on the stereoscopic display observation results.

8. A testing apparatus for a stereoscopic display device based on a beam splitter, used to implement the testing method for stereoscopic displays based on beam splitters as described in any one of claims 4-7, the apparatus comprising: The distance adjustment module is configured to adjust the distance from the focal point of the beam splitter, which is placed parallel to the display panel at the current width, to the display panel to obtain at least one candidate distance. The brightness detection module is configured to determine the brightness values ​​at at least two detection angles when performing brightness detection toward the beam splitter of the current width at each candidate distance. The distance filtering module is configured to filter candidate distances whose brightness differences are within a preset range from the at least one candidate distance based on the brightness values ​​of at least two detection angles under different candidate distances, and to use them as target distances for the production of stereoscopic display devices based on beam splitting devices and display panels.

9. The apparatus according to claim 8, wherein, The distance adjustment module includes: The sensor unit is configured to have at least two brightness sensors at at least two preset angles in front of the beam splitter of the current width.

10. The apparatus according to claim 8, wherein, The distance filtering module includes: The trend recording unit is configured to record the brightness value change trend of the current width beam splitter at at least two detection angles under different candidate distances; and to determine the candidate distance with the smallest brightness value change trend among the different candidate distances as the target distance.

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