Folding device, vehicle, display method, and storage medium

Abstract

The application discloses a folding device, a vehicle, a display method and a storage medium, and belongs to the technical field of image display. The folding device comprises a flexible display screen used for displaying a content image; and a light field screen arranged on the back of the flexible display screen and used for receiving the content image transmitted by the folding device and projecting the content image to the outside. When the content image projected by the light field screen reaches a display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the light field screen.

Description

Technical Field

[0001] This application relates to the field of image display technology, and more particularly to a folding device, vehicle, display method, and storage medium. Background Technology

[0002] Currently, with the development of science and technology, more and more users own vehicles and foldable electronic devices with foldable screen designs. Some vehicles also have HUD (Head-Up Display) functionality.

[0003] However, installing HUD functionality requires additional investment, and there is currently a lack of solutions that can directly reuse foldable electronic devices to achieve projection functionality. Summary of the Invention

[0004] This application provides a folding device, a vehicle, a display method, and a storage medium.

[0005] In a first aspect, this application provides a folding device, comprising:

[0006] Flexible display screen;

[0007] A light field screen is disposed on the back of the flexible display screen and is used to receive the content image transmitted by the folding device and project the content image to the outside. When the content image projected by the light field screen reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the light field screen.

[0008] In some embodiments, the flexible display screen includes a first display area and a second display area, and the folding device further includes:

[0009] A folding component is used to adjust the angle between the first display area and the second display area, and to adjust the projection angle of the light field screen based on the angle;

[0010] And, the light field screen is activated based on the angle being less than a set threshold.

[0011] In some embodiments, the light field screen includes:

[0012] A display panel is used to display the content image transmitted by the folding device;

[0013] A microlens array, disposed on the display panel, is used to project the content image displayed on the display panel to the outside world after adjusting the propagation direction through the microlens array.

[0014] In some embodiments, the microlens array includes a multilayer microlens array, wherein the microlenses in each microlens array are arranged in a focal plane array configuration.

[0015] Secondly, this application provides a vehicle, including:

[0016] A windshield, on which a head-up display area is formed;

[0017] In any of the above embodiments of the folding device, the content image projected by the light field screen is displayed in the head-up display area.

[0018] Thirdly, this application provides a display method applied to a folding device, the folding device including a flexible display screen, the method comprising:

[0019] The content image is transmitted to a light field screen disposed on the back of the flexible display screen, so that the light field screen projects the content image to the outside world. When the content image projected by the light field screen reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the light field screen.

[0020] In some embodiments, the method further includes:

[0021] The projection angle of the light field screen is adjusted based on the folding component of the folding device, wherein the folding component is used to adjust the angle between the first display area and the second display area of ​​the flexible display screen;

[0022] And the light field screen is activated based on the angle being less than a set threshold.

[0023] In some embodiments, the method further includes:

[0024] The display panel of the light field screen displays the content image transmitted by the folding device;

[0025] The content image displayed on the display panel is projected to the outside world after its propagation direction is adjusted by the microlens array of the light field screen.

[0026] In some embodiments, the microlens array includes a multilayer microlens array, wherein the microlenses in each microlens array are arranged in a focal plane array configuration.

[0027] Fourthly, this application provides a folding device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method described in any of the above descriptions.

[0028] Fifthly, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in any of the above descriptions.

[0029] Sixthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the method described in any of the above descriptions. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is one of the structural schematic diagrams of a folding device provided in one embodiment of this application;

[0032] Figure 2 This is a second schematic diagram of the structure of a folding device provided in one embodiment of this application;

[0033] Figure 3 A cross-sectional schematic diagram of a display panel integrating a microlens array in a folding device provided in one embodiment of this application;

[0034] Figure 4 A top view of an example monochrome display panel with a pixel square array layout that integrates a spherical microlens array in a folding device provided in an embodiment of this application;

[0035] Figure 5 A schematic diagram of a focal plane array in a folding device provided in one embodiment of this application;

[0036] Figure 6 This is the third schematic diagram of the structure of a folding device provided in one embodiment of this application;

[0037] Figure 7 A schematic flowchart illustrating a display method provided in one embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the physical structure of a folding device provided in one embodiment of this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] With the development of science and technology, more and more users own vehicles and foldable electronic devices with foldable screen designs. Some vehicles also have HUD (Head-Up Display) functionality.

[0042] However, installing HUD functionality requires additional investment, and there is currently a lack of solutions that can directly reuse foldable electronic devices to achieve projection functionality.

[0043] To this end, this application provides a folding device, a vehicle, a display method, and a storage medium. By utilizing the different functions of the front and back screens of folding devices such as mobile phones and combining conventional screen technology with light field screen technology, it is possible to display information on the front and project large-size content on the back. For example, users can project navigation, videos, music, and other content from their mobile phones onto the windshield of a vehicle through the light field screen on the back, achieving the effect of augmented reality head-up display (AR-HUD). This clearly displays navigation, videos, and other content, effectively improving the user experience.

[0044] In some embodiments, folding technology is a technology that allows devices with displays to be folded. With the rise of smart devices, folding technology can be applied to devices such as smartphones and tablets. Folding devices allows users to use devices with larger screens while also solving the problem of carrying the device. By folding the device, the width or length of the folded device can be reduced, making it easier to fit into narrower or smaller storage spaces. For example, folding the device along its width allows it to fit into a pocket that is only half the width of the folded device, or it is easier for the user to hold with one hand. Folding the device along its length allows it to fit into small pockets, and the folded device is also less likely to fall out.

[0045] The following describes in detail the folding device, vehicle, display method, and storage medium provided in the embodiments of this application.

[0046] This application provides a folding device. Figure 1 This is one of the structural schematic diagrams of a folding device provided in one embodiment of this application, such as... Figure 1 As shown, a folding device 100 is provided, comprising:

[0047] Flexible display screen 10;

[0048] A light field screen 20 is disposed on the back of the flexible display screen and is used to receive the content image transmitted by the folding device and project the content image to the outside. When the content image projected by the light field screen reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the light field screen.

[0049] Specifically, the folding device may include a foldable flexible display screen and a light field screen. The flexible display screen may be set on the front of the folding device, and the light field screen may be set on the back of the folding device, or in other words, on the back of the flexible display screen. The flexible display screen is used to display content images normally, such as providing an interactive interface for users or playing videos. The light field screen is used to project the same or different content images transmitted by the folding device onto the flexible display screen at a larger size.

[0050] It is understood that a light field screen can be an independent screen distinct from a flexible display screen. The content displayed on the light field screen can be the same as or different from that on the flexible display screen, which is not a limitation of this application.

[0051] In some embodiments, flexible displays can be implemented using conventional screen technologies, such as active-matrix organic light-emitting diodes (AMOLEDs) or organic light-emitting diodes (OLEDs).

[0052] It should be noted that the light field screen is achieved through light field screen technology, which relies on a microlens array. Each microlens is used to focus and adjust the propagation of light to form an image at a specific viewing angle and depth. For foldable devices, the adjustment and correction of light occurs on the microlens array of the reverse screen (light field screen). The light field screen includes a large number of microlenses arranged in a close array. These microlenses allow control of the propagation of light to project an image onto a designated location. The diameter and shape of each microlens may vary depending on the system design to meet specific requirements.

[0053] It is understood that the aforementioned display device can refer to a device in an enclosed or open space that can receive and carry content images, such as a projection screen, the windshield of a car window, or other transparent glass, which is not a limitation of this application.

[0054] In some embodiments, the flexible display screen and the light field screen of the foldable device can be interconnected at the system level to enable information transmission and interaction between the front main screen (flexible display screen) and the back projection screen (light field screen).

[0055] Taking a foldable device, such as a foldable phone, as an example, the two screens can be connected at the system level through the operating system (OS) of the phone system, so as to realize information transmission and interaction between the flexible display screen and the light field screen.

[0056] In some examples, the foldable phone can transmit content to the flexible display on the front and the light field screen on the back through a display serial interface (DSI). For example, the processor inside the foldable phone can transmit content images to the flexible display and the light field screen through the display serial interface to realize the display function of the flexible display and the light field screen.

[0057] It is understood that the aforementioned processors may include application processors (APs), modem processors, graphics processing units (GPUs), image signal processors (ISPs), controllers, video codecs, digital signal processors (DSPs), baseband processors, and / or neural network processing units (NPUs), etc. These different processing units may be independent devices or integrated into one or more processors.

[0058] The folding device provided in this application embodiment includes a flexible display screen and a light field screen disposed on the back of the flexible display screen. The flexible display screen is used to display content normally, and the light field screen is used to receive the content image transmitted by the folding device and project the content image to the outside. When the content image projected by the light field screen reaches the display device, the size of the content image displayed on the display device will be larger than the size of the content image displayed on the light field screen. This allows users to project small-sized navigation, video, music, and other content displayed on folding devices such as mobile phones to a larger size. For example, it can provide projection of ultra-large-sized images to achieve the effect of AR-HUD and bring users a better audio-visual experience.

[0059] In some embodiments, Figure 2 This is a second schematic diagram of the structure of a folding device provided in one embodiment of this application. Only the front view of the folding device is shown here. The back of the folding device can be configured with the specific size and position of the light field screen for content projection according to actual conditions; such as... Figure 2 As shown, the flexible display screen 10 may include a first display area and a second display area, and the folding device may further include:

[0060] The folding component 30 is used to adjust the angle between the first display area and the second display area, and to adjust the projection angle of the light field screen based on the angle.

[0061] And, the light field screen is activated based on the angle being less than a set threshold.

[0062] It should be noted that the above Figure 2 Taking a foldable device as an example, specifically a foldable phone that folds in half horizontally, the folding method of a foldable device can be vertical folding, horizontal folding, or other feasible folding methods, which is not a limitation of this application.

[0063] Specifically, the folding device also includes a folding component that divides the flexible display screen into a first display area and a second display area. Users can adjust the angle between the first display area and the second display area through the folding component.

[0064] For example, a folding component can be a hinge or a pivot.

[0065] In some embodiments, the angle between the first display area and the second display area can be set in the range of 0 to 180°.

[0066] The folding component of this application embodiment can adaptively adjust the projection angle of the light field screen based on the angle between the first display area and the second display area adjusted by the user, so as to project content images to the outside world normally.

[0067] In addition, the folding component can also determine whether the light field screen needs to be activated based on the angle between the first display area and the second display area adjusted by the user. For example, the light field screen can be activated when the angle is less than a set threshold. That is, the light field screen is activated only after the first display area and the second display area of ​​the flexible display screen are folded to a certain angle. When fully opened, the light field screen can be controlled not to be activated.

[0068] In some embodiments, the user can also control whether to activate the light field screen to project content images through control commands.

[0069] For example, a drive motor can be installed in the folding assembly described above. The drive motor can be controlled by control commands to drive the stroke of the folding assembly, so that the folding assembly folds the folding device to a suitable angle.

[0070] In some embodiments, the light field screen may include:

[0071] A display panel is used to display the content image transmitted by the folding device;

[0072] A microlens array, disposed on the display panel, is used to project the content image displayed on the display panel to the outside world after adjusting the propagation direction through the microlens array.

[0073] Specifically, the light field screen may include a display panel and a microlens array. The display panel is used to display content images transmitted by the processor (such as a central processing unit or a graphics processing unit) of the folding device. The display panel is provided with a microlens array, which can project the content images displayed on the display panel to the outside world after adjusting the propagation direction. To adjust the light propagation path on the light field screen, the shape and position of the microlenses can be adjusted to adjust the light propagation path so as to meet the required projection requirements.

[0074] Regarding microlens arrays Figure 3 This is a cross-sectional schematic diagram of a display panel integrating a microlens array in a folding device provided in one embodiment of this application, as shown below. Figure 3 As shown, the display panel 300 includes a lensless display panel 310 without a microlens array and a microlens array 320. The microlens array 320 may include multiple microlenses M. The microlens array 320 is disposed on the lensless display panel 310 to form the display panel 300. The lensless display panel 310 may also include pixel units. The pixel driving circuit in the pixel unit is used to drive the pixel light source to generate light for the display panel 300. The specific light propagation direction may be towards the observer, that is, the pixel light source can propagate light towards the observer through the corresponding microlens M.

[0075] The specific working principle of the microlens array is as follows: Figure 3 In this structure, the microlens array 320 comprises an array of independent microlenses M, each aligned with a corresponding pixel light source. Each microlens M has positive optical power and is configured to reduce the divergence or viewing angle of the light emitted from the corresponding pixel light source. The light beam emitted from the pixel light source has a wide initial divergence angle, for example, greater than 60°. After passing through the microlenses M, the light is bent by the microlenses M, forming a new light beam with a smaller divergence angle, for example, less than 30°.

[0076] In some embodiments, the microlenses M in the microlens array 320 are typically identical. Examples of microlenses may include spherical microlenses, aspherical microlenses, Fresnel microlenses, and cylindrical microlenses, etc.

[0077] The microlens array 320 typically has a planar side and a curved side. Figure 3 In this design, the bottom of the microlens M is planar, and the top is curved. The typical shape of the base of each microlens M can include circular, square, rectangular, and hexagonal shapes, etc., and the individual microlenses M can be the same or different in terms of shape, curvature, optical power, size, base, and spacing. Figure 3 In the example, the circular base of the microlens M has the same width as the pixel unit, but a smaller area, because the microlens base is circular while the pixel unit is square. In some embodiments, the area of ​​the microlens base can also be larger than the area of ​​the pixel light source.

[0078] In some embodiments, the height of the microlens M is set to no more than 0.8 micrometers or 1 micrometer, and the specific height can be set according to actual conditions. In some embodiments, the width of the microlens M is set to no more than 3.5 micrometers or 4.5 micrometers, and the specific width can be set according to actual conditions. In some embodiments, the aspect ratio of the microlens M is set to be greater than 1 or 2, and can also be set according to actual conditions.

[0079] It should be noted that a complete display panel 300 will include an array of many individual pixel units and many microlenses M. For clarity, Figure 3 The case shown in the display panel 300 is that there are only 4 independent pixel units, each of which includes a pixel light source corresponding to a single microlens M. This is only one embodiment and is not intended to limit the scope of this application.

[0080] In some embodiments, brightness enhancement is achieved by integrating a microlens array onto the display panel. In some embodiments, due to the light-focusing effect of the microlenses, the brightness with the microlens array is four times that without the microlens array in a direction perpendicular to the display surface. In alternative embodiments, the brightness enhancement factor can vary depending on the design of the microlens array and optical spacers. For example, a factor greater than 8 can be achieved.

[0081] Figure 4 A top view of an example monochrome display panel with a pixel square array layout that integrates a spherical microlens array in a folding device provided in one embodiment of this application, as shown below. Figure 4 As shown, the two display panels 400 include an array of microlenses 410, a mesa array containing pixel light sources 420 located below the microlenses 410, and optional optical spacers formed between the microlens array and the mesa array. Each individual microlens is aligned with a mesa containing an individual pixel light source. In some embodiments, the display panel 400 having a square matrix layout includes: an array of individual microlenses 410, a corresponding mesa array containing pixel light sources 420, and optional optical spacers (e.g., the square structure in the figure) between the microlens array and the mesa array.

[0082] exist Figure 4 In the corresponding display panel 400, each microlens 410 can be a spherical microlens arranged in a square, triangular or hexagonal matrix. In some embodiments, the curvature, refractive index and arrangement of the microlenses can affect the propagation path of light and can be set according to the actual situation.

[0083] In some embodiments, the light on the light field screen can be corrected and focused. When light emitted from the edge of the display screen passes through a microlens array, these microlenses fine-tune and focus the light to ensure that the light reaches the light field screen at the correct angle. This requires highly precise optical design and engineering.

[0084] In some embodiments, the light field screen may further include a substrate and a glass cover plate, wherein a display panel and a microlens array are disposed on the substrate, and the glass cover plate is used to protect the internal components of the light field screen.

[0085] In some embodiments, the microlens array may include a multilayer microlens array, wherein the microlenses in each microlens array are arranged in a focal plane array configuration.

[0086] Specifically, the microlens array in the embodiments of this application can be implemented by a multi-layer microlens array. The light field screen technology relies on the microlens array, in which each microlens is used to focus and adjust the propagation of light in order to form an image at a specific angle and depth. The microlenses in the multi-layer microlens array can be set at different positions and angles to achieve image superposition at different depths and angles. This multi-layer design helps to provide a more realistic and multi-angle projection effect, which can further improve the user experience.

[0087] Figure 5 This is a schematic diagram of a focal plane array in a folding device according to an embodiment of this application, as shown below. Figure 5 As shown, the focal plane array mainly consists of two stacked lens arrays, LA1 and LA2, and can be used in combination with a spatial mask (SM), which is located in the optical conjugate plane of the exit pupil relative to LA2.

[0088] As can be seen, the beam passes through LA1 and SM in sequence and can be focused onto the LA2 plane for display, so as to achieve image superposition display at different positions and angles, and at different depths and angles.

[0089] In addition, a focal plane array can be used for the microlenses in the multi-layer microlens array, so that each pixel is focused by multiple microlenses. This design allows the screen to display images from multiple angles at the same time, which helps to provide a more realistic and multi-angle projection effect and can further improve the user experience.

[0090] The following example illustrates the folding device provided in the embodiments of this application.

[0091] Figure 6 This is the third schematic diagram of the structure of a folding device provided in one embodiment of this application, as shown below. Figure 6 As shown, the folding device includes: a flexible display screen 10, a light field screen 20, and a folding assembly 30. The folding device projects content images at the angle shown in the figure, for example, onto the windshield of a vehicle.

[0092] It should be noted that the folding device can be a device that folds horizontally, a device that folds vertically, or any device that can achieve a folding method; this is not a limitation of this application.

[0093] This application also provides a vehicle, including:

[0094] A windshield, on which a head-up display area is formed;

[0095] In any of the above embodiments of the folding device, the content image projected by the light field screen is displayed in the head-up display area.

[0096] Specifically, the folding device described in any of the above embodiments can be installed inside a vehicle to project content images onto a head-up display area formed on the windshield.

[0097] In some embodiments, taking a mobile phone as an example of a foldable device, when a user needs to project content images from their phone onto the windshield of a vehicle, the front LCD (i.e., flexible display) and the rear directional screen (i.e., light field screen) of the phone can be folded at a 45-degree angle to activate the projection mode. Driven by the phone's OS, navigation, videos, music, and other content from the flexible display are transmitted to the rear light field screen. The light field screen, through a microlens array, controls the propagation of light, projecting the content onto the windshield to achieve an AR-HUD effect.

[0098] In other embodiments, the mobile phone can be placed in the upper area of ​​the vehicle's dashboard using a fixed magnetic attachment. The back cover of the mobile phone can be fitted with a magnetic attachment so that it can fit well with the fixed magnetic area reserved above the dashboard, so that it will not be affected during driving and can project normally.

[0099] This application also provides a display method applied to a folding device, the folding device including a flexible display screen. Figure 7 This is a flowchart illustrating a display method provided in one embodiment of this application, as shown below. Figure 7 As shown, a display method is provided, including the following steps: Step 710. This method flow is merely one possible implementation of this application.

[0100] Step 710: Transmit the content image to a light field screen disposed on the back of the flexible display screen, so that the light field screen projects the content image to the outside world, wherein when the content image projected by the light field screen reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the light field screen.

[0101] Specifically, on the one hand, the flexible display screen of the folding device can display content images normally, and on the other hand, the folding device can transmit the content images to the light field screen set on the back of the flexible display screen, so that the light field screen can project the content images to the outside world. When the content images projected by the light field screen reach the display device, the size of the content images displayed on the display device is larger than the size of the content images displayed on the light field screen, thus realizing larger-size content projection.

[0102] It is understood that a light field screen can be an independent screen distinct from a flexible display screen. The content displayed on the light field screen can be the same as or different from that on the flexible display screen, which is not a limitation of this application.

[0103] It is understood that the aforementioned display device can refer to a device in an enclosed or open space that can receive and carry content images, such as a projection screen, the windshield of a car window, or other transparent glass, which is not a limitation of this application.

[0104] In this embodiment, the folding device includes a flexible display screen and a light field screen disposed on the back of the flexible display screen. The flexible display screen is used to display content normally, and the folding device can transmit the content image to the light field screen, so that the light field screen can project the content image to the outside world. When the content image projected by the light field screen reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the light field screen. This allows users to project small-sized navigation, video, music, and other content displayed on the flexible display screen of folding devices such as foldable phones to a larger size. For example, a super-large-sized image can be projected onto the windshield of a vehicle, breaking through the limitations of small physical spaces such as inside a car, achieving the effect of AR-HUD, and bringing users a better audio-visual experience.

[0105] It should be noted that each implementation method of this application can be freely combined, rearranged, or executed individually, and does not need to rely on or depend on a fixed execution order.

[0106] In some embodiments, the projection angle of the light field screen can be adjusted based on the folding component of the folding device, wherein the folding component is used to adjust the angle between the first display area and the second display area of ​​the flexible display screen;

[0107] And the light field screen is activated based on the angle being less than a set threshold.

[0108] Specifically, the folding device also includes a folding component, which can be used to adjust the angle between the first display area and the second display area of ​​the flexible display screen, and then adjust the projection angle of the light field screen based on the folding component, and activate the light field screen based on the angle being less than a set threshold. That is, the light field screen is only activated after the first display area and the second display area of ​​the flexible display screen are folded to a certain angle. When fully opened, the light field screen can be controlled not to be activated. The set threshold can be set according to the actual situation.

[0109] In some embodiments, the angle between the first display area and the second display area can be set in the range of 0 to 180°.

[0110] In some embodiments, the user can also control whether to activate the light field screen to project content images through control commands.

[0111] In some embodiments, the display panel of the light field screen displays content images transmitted by the folding device;

[0112] The content image displayed on the display panel is projected to the outside world after its propagation direction is adjusted by the microlens array of the light field screen.

[0113] Specifically, the light field screen includes a display panel and a microlens array. The display panel can display content images transmitted from the folding device, and then the content images displayed on the display panel are projected to the outside world after the propagation direction is adjusted by the microlens array of the light field screen.

[0114] To adjust the light propagation path on the light field screen, the shape and position of the microlenses can be adjusted to change the light propagation path and make it meet the required projection requirements.

[0115] In some embodiments, the curvature, refractive index, and arrangement of microlenses can all affect the propagation path of light and can be set according to the actual situation.

[0116] In some embodiments, the light on the light field screen can be corrected and focused. When light emitted from the edge of the display screen passes through a microlens array, these microlenses fine-tune and focus the light to ensure that the light reaches the light field screen at the correct angle. This requires highly precise optical design and engineering.

[0117] In some embodiments, the light field screen may further include a substrate and a glass cover plate, wherein a display panel and a microlens array are disposed on the substrate, and the glass cover plate is used to protect the internal components of the light field screen.

[0118] In some embodiments, the microlens array includes a multilayer microlens array, wherein the microlenses in each microlens array are arranged in a focal plane array configuration.

[0119] Specifically, the microlens array in the embodiments of this application can be implemented by a multi-layer microlens array. The light field screen technology relies on the microlens array, in which each microlens is used to focus and adjust the propagation of light in order to form an image at a specific angle and depth. The microlenses in the multi-layer microlens array can be set at different positions and angles to achieve image superposition at different depths and angles. This multi-layer design helps to provide a more realistic and multi-angle projection effect, which can further improve the user experience.

[0120] In addition, a focal plane array can be used for the microlenses in the multi-layer microlens array, so that each pixel is focused by multiple microlenses. This design allows the screen to display images from multiple angles at the same time, which helps to provide a more realistic and multi-angle projection effect and can further improve the user experience.

[0121] The following uses a foldable phone as an example to illustrate the foldable device, vehicle, display method, and storage medium provided in the embodiments of this application.

[0122] The implementation of a foldable phone specifically includes the following components or related content:

[0123] 1) Front main screen (i.e. flexible display): The front main screen of the phone uses conventional screen technology (such as AMOLED or LCD) to display information on the phone normally.

[0124] 2) Reverse projection screen (also known as light field screen): This type of screen uses light field technology as the reverse screen of the phone to project content. The screen has a microlens array that controls the propagation and refraction of light to achieve the projection effect.

[0125] 3) OS driver for mobile phone system: Through system-level integration, information transmission and interaction between the front main screen and the back projection screen are realized.

[0126] 4) Windshield Projection: When a user needs to project information from their phone onto the windshield of their vehicle, they can fold the phone's front LCD and rear directional screen at a 45-degree angle to activate the projection mode. Driven by the phone's OS, navigation, video, music, and other content from the front main screen are transmitted to the rear projection screen. The rear projection screen then uses a microlens array to control light propagation, projecting the content onto the windshield to achieve an AR-HUD effect.

[0127] 5) Regarding the placement of the phone, it can be magnetically attached to the upper area of ​​the vehicle's dashboard. The back cover of the phone can be magnetically attached to ensure it fits well with the pre-installed magnetic area on the dashboard, preventing any obstruction while driving.

[0128] The reflective film used in the light field screen technology of foldable phones is typically very thin, usually on the order of a few micrometers (μm). The specific thickness of the reflective film is determined to ensure that light can pass through and form the desired light field effect on it.

[0129] The reflective film is usually fixed on the light field screen of a foldable phone, and the light field screen usually moves to control the angle at which the content image is projected. The reflective film is usually located in front of the microlens array to reflect the light emitted from the edge of the display screen, so as to focus and control the propagation of the light to ensure that the light reaches the microlens array at the correct angle.

[0130] Regarding the angle of the reflective film, light field screen technology employs a multi-microlens array to control the propagation and refraction of light, creating superimposed images at multiple angles and depths to achieve multi-angle image display. Each microlens disperses light, forming tiny pixels. Simultaneously, a focal plane array is used, specifically multiple microlenses arranged in a focal plane array, with each pixel being focused by multiple microlenses. This design allows the screen to display images from multiple angles simultaneously.

[0131] The multiple microlens array, positioned behind the reflective film, comprises numerous microlenses, each controlling the propagation of light. The array further fine-tunes and focuses the light to ensure the image is projected at the correct angle. These microlenses can control the angle and position of the light to achieve projection effects at multiple angles and depths.

[0132] It should be noted that the reflective film and the multiple microlens array need to work together. The reflective film reflects light and guides it to the microlens array, which then further adjusts the light to meet specific projection requirements. These two parts together realize the projection principle of the light field screen technology. The light field screen is usually movable to control the projection angle and position, but the reflective film is static and is used to assist in adjusting the light propagation.

[0133] Furthermore, foldable phones can use intelligent algorithms to dynamically adjust the parameters of the microlenses, adjusting the focusing effect of the microlenses according to changes in the viewing angle to ensure image clarity and color reproduction, adapting to changes in the observer's position and viewing angle. This helps maintain the clarity and stability of the projected image.

[0134] It should be noted that selecting appropriate optical materials is crucial to ensuring the effectiveness of light propagation and correction; high-quality materials can reduce light scattering and distortion.

[0135] In summary, the implementation of light field screen technology involves complex optical design and engineering, requiring highly precise microlens arrays to adjust and correct light propagation to meet specific projection requirements. This technology has broad application prospects in AR-HUD systems because it can provide more realistic and multi-angle image projection.

[0136] The embodiments of this application have at least the following beneficial effects:

[0137] 1) Foldable design: The phone's foldable design allows for switching between the front main screen and the back projection screen, providing both normal display and content projection functions.

[0138] 2) Dual-screen system-level integration: Through the OS driver of the mobile phone system, information transmission and interaction between the front main screen and the back projection screen are realized, allowing users to easily switch and control the projected content.

[0139] 3) Ultra-large screen projection: Utilizing the light field screen technology of the reverse projection screen, ultra-large screen projection is achieved, providing passengers in the vehicle with a better audio-visual experience.

[0140] 4) Break through spatial limitations: Project navigation, videos, music and other content from your mobile phone onto the windshield of the vehicle, instantly turning your mobile phone into an AR-HUD, breaking through the limitations of the physical space inside the car, and providing more convenient and safer navigation and driving assistance functions.

[0141] With the folding device, vehicle, display method, and storage medium proposed in this application, users can enjoy normal information display on their mobile phones, while also projecting the content onto the windshield of a vehicle to achieve the effect of AR-HUD, providing a better audio-visual experience for passengers inside the vehicle.

[0142] Figure 8 This is a schematic diagram of the physical structure of a folding device according to one embodiment of this application, as shown below. Figure 8 As shown, the folding device may include a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other via the communication bus 840. The processor 810 can call logical instructions in the memory 830 to execute a display method, which is applied to the folding device, the folding device including a flexible display screen, and the method includes:

[0143] The content image is transmitted to a light field screen disposed on the back of the flexible display screen, so that the light field screen projects the content image to the outside world. When the content image projected by the light field screen reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the light field screen.

[0144] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0145] On the other hand, this application also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer is able to execute the methods provided in the above-described method embodiments. The method is applied to a folding device, which includes a flexible display screen. The method includes:

[0146] The content image is transmitted to a light field screen disposed on the back of the flexible display screen, so that the light field screen projects the content image to the outside world. When the content image projected by the light field screen reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the light field screen.

[0147] In another aspect, this application also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, is implemented to perform the display methods provided in the above-described method embodiments. The method is applied to a folding device, the folding device including a flexible display screen, and the method includes:

[0148] The content image is transmitted to a light field screen disposed on the back of the flexible display screen, so that the light field screen projects the content image to the outside world. When the content image projected by the light field screen reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the light field screen.

[0149] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0150] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A folding device, comprising: Flexible display screen; A light field screen is disposed on the back of the flexible display screen, the light field screen including a display panel and a microlens array disposed on the display panel; The display panel is used to display content images transmitted by the folding device; The microlens array is used to project the image displayed on the display panel to the outside after adjusting the propagation direction through the microlens array. Wherein, when the content image projected by the microlens array reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the display panel; The display device is a device that receives and carries the content image within a closed or open space.

2. The folding device according to claim 1, wherein, The flexible display screen includes a first display area and a second display area, and the folding device further includes: A folding component is used to adjust the angle between the first display area and the second display area, and to adjust the projection angle of the light field screen based on the angle; And, the light field screen is activated based on the angle being less than a set threshold.

3. The folding device according to claim 1, wherein, The microlens array includes a multi-layer microlens array, and the microlenses in each microlens array are arranged in a focal plane array manner.

4. A vehicle comprising: A windshield, on which a head-up display area is formed; The folding device according to any one of claims 1-3, wherein the content image projected by the light field screen is displayed in the head-up display area.

5. A display method applied to a folding device, the folding device comprising a flexible display screen and a light field screen disposed on the back of the flexible display screen, the light field screen comprising a display panel and a microlens array disposed on the display panel; the method comprising: The content image transmitted by the folding device is displayed on the display panel. The image displayed on the display panel is projected to the outside through the microlens array after the propagation direction is adjusted by the microlens array. Wherein, when the content image projected by the microlens array reaches the display device, the size of the content image displayed on the display device is larger than the size of the content image displayed on the display panel; The display device is a device that receives and carries the content image within a closed or open space.

6. The display method according to claim 5, further comprising: The projection angle of the light field screen is adjusted based on the folding component of the folding device, wherein the folding component is used to adjust the angle between the first display area and the second display area of ​​the flexible display screen; And the light field screen is activated based on the angle being less than a set threshold.

7. The display method according to claim 5, wherein, The microlens array includes a multi-layer microlens array, and the microlenses in each microlens array are arranged in a focal plane array manner.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the display method as described in claims 5-7.

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