WO2022262840A1

WO2022262840A1 - Stereo display device based on beam splitting device, and testing method and apparatus

Info

Publication number: WO2022262840A1
Application number: PCT/CN2022/099370
Authority: WO
Inventors: 夏正国; 潘熙松; 蔡冬铃; 汪洋
Original assignee: 纵深视觉科技(南京)有限责任公司
Priority date: 2021-06-17
Filing date: 2022-06-17
Publication date: 2022-12-22
Also published as: CN115667868A; DE212022000122U1; CN113405778A

Abstract

Disclosed in embodiments of the present application are a stereo display device based on a beam splitting device, and a testing method and apparatus. The stereo display device comprises a display panel and a beam splitting device; the distance between the display panel and the beam splitting device is less than the focal length f of the beam splitting device; the distance from a focal point of the beam splitting device to the display panel is set to be 0.4f-0.6f, such that a brightness change of the stereo display device when the stereo display device is viewed from different angles is within a preset range.

Description

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

This application claims the priority of the Chinese patent application with application number 202110671609.1 submitted to the China Patent Office on June 17, 2021, and the entire content of the above application is incorporated by reference in this application.

technical field

The embodiments of the present application relate to the field of naked-eye 3D (3-dimensional, three-dimensional) display, for example, to a stereoscopic display device based on a light splitting device, a testing method, and a testing device.

Background technique

In the technology of realizing naked-eye 3D through light-splitting devices, the effect of naked-eye 3D is generally achieved by covering the lenticular grating on the pixel panel of the mobile phone. However, since the pixels of the display panel of a matrix array display (such as LCD (Liquid Crystal Display) or LED (Light Emitting Diode, light emitting diode) display) are not closely arranged, there are intervals between adjacent pixels, which are generally non-luminous black , due to the existence of the black area, the brightness of the user's viewing screen changes at different angles, so when the mobile phone shakes, this light and dark change gives people a dazzling feeling, which reduces the user's experience.

Contents of the invention

Embodiments of the present application provide a stereoscopic display device, a testing method, and a testing device based on a light splitting device.

In the first aspect, the embodiment of the present application provides a stereoscopic display device based on a light splitting device, the device includes:

A display panel and a 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, and the distance between the focus of the light-splitting device and 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 second aspect, an embodiment of the present application provides a method for testing a stereoscopic display device based on a light splitting device, and the method is used to produce a stereoscopic display device based on a light splitting device, including:

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

Determine the luminance values of at least two detection angles when performing luminance detection towards the light splitting device of the current width under each candidate distance;

According to the luminance values of at least two detection angles under different candidate distances, from the at least one candidate distance, a candidate distance whose luminance difference is within a preset range is selected as a target distance, which is used to produce a three-dimensional image based on a light splitting device and a display panel. display screen.

In the third aspect, an embodiment of the present application also provides a test device based on a stereoscopic display of a light splitting device, the device includes:

The distance adjustment module is configured to adjust the distance from the focal point of the light splitting device placed parallel to the current width in front of the display panel to the display panel to obtain at least one candidate distance;

A brightness detection module, configured to determine the brightness values of at least two detection angles when performing brightness detection towards the light splitting device of the current width under each candidate distance;

The distance screening module is configured to screen the at least one candidate distance according to the brightness values of at least two detection angles under different candidate distances to obtain a candidate distance whose brightness difference is within a preset range as the target distance, for producing A device and a display panel for a stereoscopic display device.

The above content of the invention is only an overview of the embodiments of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy Understand, the specific implementation manner of the present application is enumerated below.

Description of drawings

Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating the embodiments and are not to be considered as limiting the application. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:

FIG. 1 is a schematic diagram of a stereoscopic display device based on a light splitting device provided in Embodiment 1 of the present application;

Fig. 2 is a schematic diagram of a three-dimensional display of a light splitting device at different angles of a candidate distance provided by an embodiment of the present application;

Fig. 3 is a schematic diagram of a stereoscopic display of a light splitting device at different angles of another candidate distance provided by an embodiment of the present application;

FIG. 4 is a flow chart of a test method for a stereoscopic display device based on a light splitting device provided in Embodiment 2 of the present application;

Fig. 5 is a schematic diagram of a three-dimensional display of a light splitting device at different angles of the target distance provided in Embodiment 2 of the present application;

Fig. 6 is a statistical diagram of the ratio of different colors displayed in a three-dimensional display of a light-splitting device at different angles of the target distance provided in Embodiment 2 of the present application;

Fig. 7 is a schematic structural diagram of a testing device for a stereoscopic display device based on a light-splitting device provided in Embodiment 3 of the present application.

detailed description

The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here 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 some structures related to the present application are shown in the drawings but not all structures.

Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe various operations (or steps) as sequential processing, many of the operations may be performed in parallel, concurrently, or simultaneously. In addition, the order of operations can be rearranged. The process may be terminated when its operations are complete, but may also have additional steps not included in the figure. The processing may correspond to a method, function, procedure, subroutine, subroutine, or the like.

Embodiment one

FIG. 1 is a schematic diagram of a stereoscopic display device based on a light splitting device provided in Embodiment 1 of the present application.

A stereoscopic display device based on a light splitting device, including 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 focus of the light splitting device reaches the display panel The distance d is configured to be 0.4f-0.6f, so that the brightness change of the stereoscopic display device when viewed from different angles is within a preset range.

At present, in the technology of realizing stereoscopic display based on light-splitting devices and display panels, the realization of naked-eye 3D mobile phones is usually achieved by covering the light-splitting device on the pixel display panel to complete the stereoscopic display. The light-splitting device here can generally be a lenticular lens grating. But due to the black space exists between the display panel pixels of LCD and LED displays. As shown in Figure 1, when the pixels of the display panel are magnified by the lenticular lens grating, the black space between the pixels will also be magnified. Due to the existence of the black space, the brightness of the screen changes when the user watches the screen from different angles. , d in Figure 1 represents the distance from the focal point of the lenticular lens grating to the display panel. As shown in Figure 2 and Figure 3, in the enlarged part of the display panel at different angles, the proportion of the black space is different for a single cylinder. Therefore, after zooming in, it may cause different color compositions at different angles. , resulting in a dazzling situation.

And, as shown in Figure 2 and Figure 3, the distance from the focal point of the lenticular lens to the display panel in Figure 2 is 0.2f (f is the focal length of the lenticular lens), and the distance from the focus of the lenticular lens to the display panel in Figure 3 is 0.33f, it can be seen from Figure 2 and Figure 3 that if the distance d, that is, the distance from the focal point of the lenticular lens to the display panel, changes, the ratio of the magnification of the pixels and black intervals on the display panel by the lenticular lens will be different. Among the six observation directions, the enlarged areas in the first and fourth directions from top to bottom in Figure 2 are invalid and non-luminous intervals, so the light seen will be very dark, while the enlarged areas in other directions It is a pixel that emits light, so it is brighter. However, in Figure 3, the enlarged areas in the first, third, fourth, and sixth directions from top to bottom are pixels that contain black spaces that do not emit light, so the light seen will be darker.

As shown in FIG. 1 , the distance d from the focal point of the light splitting device to the display panel can be configured as 0.4f-0.6f, which can make the brightness change of the stereoscopic display device when viewed at different angles be within a preset range.

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

In an embodiment, the distance d from the focal point of the light splitting device to the display panel may be configured as 0.5f.

Embodiment two

Fig. 4 is a flowchart of a test method for a stereoscopic display device based on a spectroscopic device provided in Embodiment 2 of the present application. This method can test the stereoscopic display device based on a spectroscopic device provided in Embodiment 1 of the production. The test device of the three-dimensional display device of the device can be implemented, and the device can be implemented by software and/or hardware, and can be integrated into the electronic device. As shown in Figure 4, the testing method of the stereoscopic display device based on the light splitting device in this embodiment includes the following steps:

S410. Adjust the distance from the focal point of the light splitting device parallel to the current width in front of the display panel to the display panel to obtain a candidate distance.

From the observation results in Figure 2 and Figure 3, it is found that the distance between the focal point of the cylindrical lens and the display panel can be changed by testing, so that the display panel is at a suitable focal length, and the influence of the black interval in different directions can be kept basically the same. Thereby avoiding the dazzling situation caused by the brightness change.

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

A solution in this embodiment may be combined with one or more solutions in this embodiment. Wherein, at least two brightness sensors are equipped at least two preset angles in front of the light splitting device of the current width.

Wherein, the detection of brightness at at least two detection angles can be performed by setting brightness sensors at different angles.

S420. Determine, under the candidate distance, brightness values at at least two detection angles when performing brightness detection toward the spectroscopic device of the current width.

Among them, as shown in the examples in Figure 2 and Figure 3, under the candidate distances of 0.2f and 0.33f, the direction of the line of sight perpendicular to the display panel is taken as 0°, and the six directions are -30°, -20°, and -10° respectively. ° and 10°, 20°, 30°. The detection angle can be redefined. The more the detection angle is set, the more accurately the brightness change at the candidate distance can be determined.

S430. According to the luminance values of at least two detection angles under different candidate distances, from at least one candidate distance, select a candidate distance whose luminance difference is within a preset range as the target distance, and use it for producing a three-dimensional display based on a spectroscopic device and a display panel. display screen.

Among them, the preset range of the brightness difference can be that the brightness difference value between different detection angles is less than 5%, and the distance of the brightness difference within the preset range is found from the candidate distances as the target distance, and the spectroscopic based device is produced according to the target distance stereoscopic display device.

A solution in this embodiment may be combined with one or more solutions in this embodiment. Wherein, according to the brightness values of at least two detection angles under different candidate distances, the candidate distances whose brightness difference is within a preset range are selected from the candidate distances as the target distance may include steps A1-A2:

Step A1, recording the change trend of the luminance value of the spectroscopic device of the current width at the at least two detection angles under different candidate distances.

For example, the change trend of brightness values may refer to the difference between the brightness values of at least two detection angles under the same candidate distance.

Step A2. Determine the candidate distance with the smallest change tendency of the brightness value among the different candidate distances as the target distance.

Wherein, the brightness change trend of the current width of the spectroscopic device at each candidate distance is recorded between the set detection angles, and the candidate distance with the smallest brightness change trend is selected as the target distance. As shown in Figure 5, when the width of the lenticular lens (the current width of the light splitting device) covers two pixels, it can be found that when the distance d is 0.5f, the influence of the black interval on the brightness viewed from different angles is consistent. After further expanding the observation angle in Figure 5, count the proportion of the black interval of each observation angle in the observation area after the enlargement, as shown in Figure 6, when the candidate distance is 0.5f, the black interval of multiple observation angles The proportion is always 20%, so there is no change in light and dark when viewed from different angles.

Among them, the constant ratio of the black interval can be understood as that the area ratio of the black interval in the observation area remains unchanged when observed from different observation angles, which can be recorded as a constant. After changing the viewing angle, the area ratio remains constant.

A solution in this embodiment may be combined with one or more solutions in this embodiment. Wherein, in the case of determining the candidate distance, change the preset sensor distance between the at least two sensors and the light splitting device of the current width; record the change trend of the brightness value under the at least two preset sensor distances Minimum preset sensor distance.

A solution in this embodiment may be combined with one or more solutions in this embodiment. Wherein, after selecting the candidate distances whose brightness difference is within a preset range from the candidate distances as the target distance according to the brightness values of at least two detection angles under different candidate distances, steps B1-B3 may be included:

Step B1. Sending observation instructions to observers under the condition of the target distance, the observation instructions are used to instruct the observers to observe the stereoscopic display results respectively at at least two detection angles.

Step B2, receiving the stereoscopic display observation results of the observer at at least two detection angles.

Step B3. Filter out the actual target distance from the target distances according to the stereoscopic display observation results.

Among them, at the target distance, under the condition that the luminance variation trend of each detection angle is the smallest, due to the display characteristics of the naked-eye 3D realized by the spectroscopic device, there may be target distances in which the stereoscopic display cannot be realized. Therefore, it is necessary for the observers to actively observe the stereoscopic display results, remove the target distances that cannot be stereoscopically displayed from the target distance set, and screen out the actual target distances that can achieve stereoscopic display.

In this embodiment, the candidate distance is obtained by adjusting the distance from the focal point of the light splitting device of the current width parallel to the front of the display panel to the display panel; it is determined that at the candidate distance, at least two The brightness value of the detection angle; according to the brightness values of at least two detection angles under different candidate distances, at least one candidate distance is screened to obtain a candidate distance with a brightness difference within a preset range as the target distance, which is used for production based on light splitting devices and The stereoscopic display device of the display panel can achieve the technical effect of avoiding the dazzling situation 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.

Using the embodiment of the present application, the candidate distance is obtained by adjusting the distance from the focal point of the spectroscopic device of the current width to the display panel, so that the ratio of pixels passing through the spectroscopic device changes, and then the brightness values of at least two detection angles are detected, from at least two From the luminance value of the angle, find out the candidate distance corresponding to a group of angles with the smallest luminance difference or luminance change trend between different angles as the target distance, and produce a stereoscopic display device based on a spectroscopic device according to the target distance, which can avoid viewing spectroscopic light at different angles When the naked-eye 3D display panel is realized by the device, the dazzling situation caused by the brightness change improves the technical effect of user experience.

Embodiment three

FIG. 7 is a schematic structural diagram of a testing device for a stereoscopic display device based on a spectroscopic device provided in Embodiment 3 of the present application. The device can test the stereoscopic display device based on the light splitting device, the device can be realized by software and/or hardware, and integrated in the electronic device. The device is used to implement the test method based on the stereoscopic display of the light splitting device provided in the above embodiment. As shown in Figure 7, the test device based on the stereoscopic display of the light splitting device provided in this embodiment includes:

The distance adjustment module 710 is configured to adjust the distance from the focal point of the light splitting device placed parallel to the current width in front of the display panel to the display panel to obtain at least one candidate distance;

The brightness detection module 720 is configured to determine the brightness values of at least two detection angles when performing brightness detection towards the light splitting device of the current width under each candidate distance;

The distance screening module 730 is configured to select from the at least one candidate distance a candidate distance whose brightness difference is within a preset range according to the brightness values of at least two detection angles under different candidate distances as the target distance, for producing a target distance based on A stereoscopic display device of a light splitting device and a display panel.

On the basis of the above embodiments, in one embodiment, the distance adjustment module 710 includes a sensor equipped unit, which is configured as:

At least two brightness sensors are equipped at least two preset angles in front of the light splitting device of the current width.

On the basis of the foregoing embodiments, in one embodiment, the distance screening module 730 includes a trend recording unit, which is set to:

Recording the change trend of the luminance value of the spectroscopic device of the current width at the at least two detection angles under different candidate distances;

Among the different candidate distances, the candidate distance with the smallest change tendency of the brightness value is determined as the target distance.

On the basis of the foregoing embodiments, in one embodiment, the distance screening module 730 is set to:

Sending observation instructions to observers under the condition of the target distance, the observation instructions are used to instruct the observers to observe the stereoscopic display results at least two detection angles;

receiving stereoscopic display observation results of the observer at at least two detection angles;

The actual target distance is filtered out from the target distance according to the stereoscopic display observation result.

The testing device for the stereoscopic display device based on the spectroscopic device provided in the embodiment of the present application can execute the test method of the stereoscopic display device based on the spectroscopic device provided in any embodiment of the above-mentioned application, and has the ability to execute the stereoscopic display device based on the spectroscopic device For the corresponding functions and beneficial effects of the test method, refer to the relevant operations of the test method for the stereoscopic display device based on the light splitting device in the foregoing embodiments for the detailed process.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims

A stereoscopic display device based on a light splitting device, comprising a display panel and a light splitting device, the distance between the display panel and the light splitting device is smaller than the focal length f of the light splitting device, and the focus of the light splitting device reaches the display panel The distance is configured as 0.4f-0.6f, so that the brightness change of the stereoscopic display device when viewed from different angles is within the preset range.
The device according to claim 1, wherein the distance from the focal point of the light splitting device to the display panel is 0.4f-0.5f.
The device according to claim 2, wherein the distance from the focal point of the light splitting device to the display panel is 0.5f.
A method for testing a stereoscopic display device based on a light splitting device, used to produce the stereoscopic display device based on a light splitting device according to any one of claims 1-3, the method comprising:

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

Determine the luminance values of at least two detection angles when performing luminance detection towards the light splitting device of the current width under each candidate distance;

According to the luminance values of at least two detection angles under different candidate distances, from the at least one candidate distance, a candidate distance whose luminance difference is within a preset range is selected as a target distance, which is used to produce a three-dimensional image based on a light splitting device and a display panel. display screen.
The method according to claim 4, wherein at least two brightness sensors are equipped at least two preset angles in front of the light splitting device of the current width.
The method according to claim 4, wherein, according to the brightness values of at least two detection angles under different candidate distances, a candidate distance whose brightness difference is within a preset range is selected from the at least one candidate distance as the target distance, include:

Recording the change trend of the luminance value of the spectroscopic device of the current width at the at least two detection angles under different candidate distances;

Among the different candidate distances, the candidate distance with the smallest change tendency of the brightness value is determined as the target distance.
According to the method according to claim 4, after selecting from the at least one candidate distance according to the brightness values of at least two detection angles under different candidate distances, a candidate distance whose brightness difference is within a preset range is obtained as the target distance, include:

Sending observation instructions to observers under the condition of the target distance, the observation instructions are used to instruct the observers to observe the stereoscopic display results at least two detection angles;

receiving stereoscopic display observation results of the observer at at least two detection angles;

The actual target distance is filtered out from the target distance according to the stereoscopic display observation result.
A test device for a stereoscopic display device based on a light splitting device, the device comprising:

The distance adjustment module is configured to adjust the distance from the focal point of the light splitting device placed parallel to the current width in front of the display panel to the display panel to obtain at least one candidate distance;

A brightness detection module, configured to determine the brightness values of at least two detection angles when performing brightness detection towards the light splitting device of the current width under each candidate distance;

The distance screening module is configured to screen the at least one candidate distance according to the brightness values of at least two detection angles under different candidate distances to obtain a candidate distance whose brightness difference is within a preset range as the target distance, for producing A device and a display panel for a stereoscopic display device.
The device according to claim 8, wherein the distance adjustment module comprises:

The sensor equipped unit is configured to be equipped with at least two brightness sensors at least two preset angles in front of the light splitting device of the current width.
The device according to claim 8, wherein the distance screening module comprises:

A trend recording unit, configured to record the change trend of the luminance value of the spectroscopic device of the current width at the at least two detection angles under different candidate distances; determine the candidate with the smallest change trend of the luminance value among the different candidate distances distance, as the target distance.