A display device and a sound device

Abstract

The application discloses a display device and a sound device, the display device comprising a display screen, a first optical processing unit and a second optical processing unit; the display screen comprising a first display area and a second display area, the display screen being used for displaying a background image and a foreground image in the first display area and the second display area respectively; the first optical processing unit being used for adjusting the polarization direction of the background image light to a specified angle and shooting the background image light with the adjusted polarization direction to the second optical processing unit; the second optical processing unit being used for reflecting and transmitting the foreground image light and the background image light with the adjusted polarization direction respectively based on the difference between the polarization directions of the foreground image light and the background image light with the adjusted polarization direction, so that the two groups of light are shot out in the same direction at the same position. By using the application, the visual distance of the foreground image and the background image can be adjusted to display a better stereoscopic effect, the clarity of the stereoscopic image displayed by the display device can be improved, and the cost of the display device is reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device and an audio device. Background Technology

[0002] In recent years, with the development of technology, audio technology has gradually evolved from traditional audio equipment (which can only play sound) to audiovisual equipment (which combines images and sound). Currently, in order to achieve better stereoscopic visual effects, many audiovisual equipment use holographic projection technology to display images.

[0003] When using holographic projection technology to display images, two projectors are placed facing each other. Each projector emits light into the area between them. A specific medium is set at the imaging position. The light rays emitted by the two projectors corresponding to the same pixel point strike the medium at the same spatial point, forming the image of that pixel. Based on this principle, multiple spatial pixels can be displayed, presenting an image with a three-dimensional effect.

[0004] When a speaker produces sound, it vibrates, and the amplitude of this vibration is greater when the speaker volume is high. Because the two projectors are positioned differently, when the vibration amplitude is large, it may cause the two projectors to vibrate at different amplitudes, resulting in the corresponding light rays not being able to reach the same spatial point, thus causing the image displayed by the holographic projection technology to appear blurry. Summary of the Invention

[0005] This application provides a display device and an audio device, which can solve the problems in related technologies. The technical solution is as follows:

[0006] In a first aspect, a display device is provided, comprising a display screen, a first optical processing unit, and a second optical processing unit. The display screen includes a first display area and a second display area. The different display areas of the display screen have a unified polarization direction. The first display area is used to display a background image, and the second display area is used to display a foreground image. The first optical processing unit is located in the light-emitting direction of the first display area. The first display area emits background image light. After the background image light enters the first optical processing unit, the first optical processing unit can adjust the polarization direction of the background image light entering the first display area by a specified angle and direct the polarized background image light towards the second optical processing unit. The second optical processing unit is located in the light-emitting direction of the second display area. The second display area emits foreground image light. After the foreground image light enters the second optical processing unit, the second optical processing unit can reflect and transmit the foreground image light and the background image light respectively based on the difference in polarization direction between the foreground image light entering the second display area and the polarized background image light entering the first optical processing unit, so that the two sets of light rays exit at the same position and in the same direction.

[0007] As can be seen, during the propagation of background and foreground light rays in the display device, the background light rays need to be processed by the first and second optical processing units, while the foreground light rays only need to be processed by the second optical processing unit. Consequently, the propagation distance of the background light rays to the light-emitting position is greater than that of the foreground light rays. The distance between the imaging position of the background image and the light-emitting position is greater than that between the imaging position of the foreground image and the light-emitting position. As a result, the visual effect of the background image appears more distant, while the visual effect of the foreground image appears closer. When the user views the image from different angles, the relative positions of the background and foreground images are different, giving the image displayed by the display device a three-dimensional effect.

[0008] The solution shown in this application embodiment can be a liquid crystal display (LCD) or a light-emitting diode (LED) equipped with a polarizer. Both LCD displays and LED displays equipped with polarizers can display images with linearly polarized light.

[0009] The total display area of ​​the first and second display areas can be the entire display screen or a portion of it. The sizes of the display areas of the first and second display areas can be the same or different. The shapes of the display areas of the first and second display areas can be the same or different; for example, the first display area can be rectangular, and the second display area can be circular. The first and second display areas can be adjacent or spaced apart. The first and second display areas can be fixed areas on the display screen or areas whose positions can dynamically change, with the position changes dynamically controlled by software.

[0010] The first optical processing unit may include a mirror and a component capable of changing the polarization direction of linearly polarized light. This component may be an interferometer, a λ / 4 glass plate, etc. The second optical processing unit may include a reflective polarizing image splitter or a beam splitter, etc., capable of both transmitting and reflecting light, to superimpose the background image light and the foreground image light together.

[0011] In one possible implementation, the first optical processing unit includes a first reflective polarizing image splitter, a λ / 4 glass plate, and a mirror. The first reflective polarizing image splitter is located in the light-emitting direction of the first display area, from which background image light is emitted. The first reflective polarizing image splitter can completely reflect the background image light in a first direction. The λ / 4 glass plate is located in the first direction of the first reflective polarizing image splitter, and it adjusts the polarization direction of the transmitted background image light by 45° (increasing the angle by 45°). The mirror is located on the side of the λ / 4 glass plate away from the first reflective polarizing image splitter, and it reflects the background image light incident along the first direction in a second direction. The second optical processing unit is located in the second direction of the first reflective polarizing image splitter.

[0012] The reflector can be a specular reflector or a retroreflector.

[0013] The embodiment of this application shows a first reflective polarization image splitter with mutually orthogonal reflective polarization directions and transmission polarization directions. The first direction is the direction from the first reflective polarization image splitter toward the λ / 4 glass slide, and the second direction is the direction from the reflector toward the first reflective polarization image splitter. The first reflective polarization image splitter can correspond to the entire first display area or only a portion of the first display area. The two sides of the first reflective polarization image splitter can be bonded or snapped to the display screen and the λ / 4 glass slide, respectively. The first reflective polarization image splitter can have a rectangular thin plate structure, and the thickness of the first reflective polarization image splitter can be the same as the thickness of the λ / 4 glass slide.

[0014] By setting a reflector in the first direction of the first reflective polarization image splitter and setting a second optical processing unit in the second direction of the first reflective polarization image splitter, the reflector can reflect the background image light reflected by the first reflective polarization image splitter in the second direction, and the background image light can enter the second optical processing unit along the second direction after passing through the first reflective polarization image splitter.

[0015] In one possible implementation, the second optical processing unit includes a second reflective polarization image splitter located in the light-emitting direction of the second display area, which completely reflects the foreground image light incident on the second display area in a second direction.

[0016] The embodiment of this application shows that the second reflective polarization image splitter has mutually orthogonal reflected polarization directions and transmitted polarization directions. The first and second reflective polarization image splitters can be the same or different in size, and can have the same thickness. The first and second reflective polarization image splitters can be glued or snapped together to form a reflective polarization image splitter assembly, which is then fixedly connected to the display screen. Alternatively, the first and second reflective polarization image splitters can be glued or snapped onto the display screen separately.

[0017] Among them, the reflected polarization direction refers to a specific polarization direction. When linearly polarized light has this polarization direction, the reflective polarization image splitter will completely reflect the linearly polarized light. The transmitted polarization direction refers to a specific polarization direction. When linearly polarized light has this polarization direction, the reflective polarization image splitter will completely transmit the linearly polarized light.

[0018] Thus, during the propagation of light: for the background image light, the first reflecting polarization plate completely transmits or completely reflects the background image light, while the second reflecting polarization plate completely transmits the background image light; for the foreground image light, the second reflecting polarization plate completely transmits the foreground image light. Therefore, the light intensity of both the foreground and background image light does not decrease when it reaches the light-emitting position. When the user observes from the light-emitting position, both the foreground and background images have strong brightness, and the images of both the foreground and background images are relatively clear.

[0019] In one possible implementation, the first side of the first reflective polarizing image splitter is located at the first edge of the first display area and is connected to the display screen, and the second side of the second reflective polarizing image splitter is located at the second edge of the second display area and is connected to the display screen.

[0020] Wherein, the first edge is the edge of the first display area that is close to the second display area, and the second edge is the edge of the second display area that is close to the first display area.

[0021] In the embodiment of this application, the first edge and the second edge can be spaced apart or attached. When the first edge and the second edge are spaced apart, the first edge and the second edge can be parallel or at a certain angle.

[0022] Optionally, the first edge and the second edge may be spaced apart. When there is a gap between the first edge and the second edge, the propagation distance of the light from the background image to the light-emitting position is relatively large, and the distance between the imaging position of the background image and the light-emitting position is also relatively large. Correspondingly, the distance between the imaging position of the background image and the imaging position of the foreground image is relatively large, and when the user observes from the light-emitting direction, there is a relatively large visual distance between the background image and the foreground image.

[0023] Optionally, the first edge and the second edge can be attached together. When the first edge and the second edge are attached together, the propagation distance of the light from the background image to the light-emitting position is relatively small, and the distance between the imaging position of the background image and the light-emitting position is also relatively small. Correspondingly, the distance between the imaging position of the background image and the imaging position of the foreground image is relatively small. When the user observes from the light-emitting direction, the background image and the foreground image present a relatively small visual distance.

[0024] In one possible implementation, a λ / 4 glass slide is attached to the mirror.

[0025] In the embodiments of this application, the λ / 4 glass slide and the reflector can be glued together, or grooves and protrusions can be respectively provided on the λ / 4 glass slide and the reflector, and the λ / 4 glass slide and the reflector can be snapped together by the cooperation between the grooves and protrusions. The areas of the λ / 4 glass slide and the reflector can be the same or different. For example, the area of ​​the λ / 4 glass slide can be greater than or equal to the area of ​​the reflector.

[0026] In this way, the light rays in the background image only undergo one medium transition when propagating between the λ / 4 glass plate and the mirror, which can reduce light refraction and thus reduce light loss.

[0027] In one possible implementation, the first reflective polarization image splitter is at a first angle to the first display area, the second reflective polarization image splitter is at a second angle to the second display area, and the reflector is at a third angle to the first reflective polarization image splitter.

[0028] Among them, the first angle is equal to the third angle, and the first angle is complementary to the second angle.

[0029] In this way, the propagation direction of both the foreground and background light rays reaching the light-emitting position is perpendicular to the reflector.

[0030] Optionally, the first angle can be equal to 45°.

[0031] This allows the overall structure of the display device to be more square.

[0032] In one possible implementation, the first optical processing unit includes a λ / 4 glass plate and a mirror. The λ / 4 glass plate and the mirror are located in the light-emitting direction of the first display area, with the λ / 4 glass plate in contact with the mirror. The λ / 4 glass plate is used to adjust the polarization direction of the transmitted light by 45°. The mirror is used to reflect the background image light emitted from the first display area and transmitted through the optical glass plate in a third direction. The second optical processing unit includes a second reflective polarization image splitter. The second reflective polarization image splitter is located in the third direction of the mirror and in the light-emitting direction of the second display area. The second reflective polarization image splitter is used to reflect the foreground image light incident on the second display area in a third direction.

[0033] Among them, the third direction is the direction in which the reflecting mirror faces the second reflective polarization image separation plate.

[0034] The scheme shown in this application embodiment can be a specular mirror or a retroreflector. The second optical processing unit can include components such as a reflective polarizing image splitter or a beam splitter that can both transmit and reflect light. The second reflective polarizing image splitter and the mirror can be parallel, or there can be a certain angle between them. The areas of the second reflective polarizing image splitter and the mirror can be the same or different; for example, the area of ​​the mirror can be slightly larger than that of the second reflective polarizing image splitter. The second reflective polarizing image splitter and the mirror can both be attached to the display screen, in which case they can both be bonded to the display screen. The second reflective polarizing image splitter and the mirror can also not be attached to the display screen. When neither the second reflective polarizing image splitter nor the mirror is attached to the display screen, the distance between the second reflective polarizing image splitter and the display screen and the distance between the mirror and the display screen can be the same or different.

[0035] In this way, the display device only needs one reflective polarizing image splitter to display stereoscopic images, which reduces the space occupied by the display device. At the same time, it simplifies the structure of the display device and facilitates assembly.

[0036] Optionally, the first display area and the reflector are at a 45° angle.

[0037] This allows the overall structure of the display device to be more square.

[0038] In one possible implementation, the reflected polarization direction of the first and second reflective polarization image splitters is the same as the polarization direction of the display screen.

[0039] Thus, during the propagation of light: for the background image light, the first reflecting polarization plate completely transmits or completely reflects the background image light, while the second reflecting polarization plate completely transmits the background image light; for the foreground image light, the second reflecting polarization plate completely transmits the foreground image light. Therefore, the light intensity of both the foreground and background image light does not decrease when it reaches the light-emitting position. When the user observes from the light-emitting position, both the foreground and background images have strong brightness, and the images of both the foreground and background images are relatively clear.

[0040] In one possible implementation, the display screen is a flat panel display screen.

[0041] The solution shown in this application embodiment can be a flat panel display, which includes two display portions corresponding to a first display area and a second display area, respectively. Alternatively, the flat panel display can be composed of two independent display panels located on the same plane.

[0042] In a second aspect, an audio device is provided, which includes the display device described in the first aspect.

[0043] The beneficial effects of the technical solutions provided in this application are:

[0044] In this embodiment, the display device includes a display screen, a first optical processing unit, and a second optical processing unit. The display screen includes a first display area and a second display area. The first display area displays a background image, and the second display area displays a foreground image. The background image displayed in the first display area is incident on the first optical processing unit in the form of light rays. The first optical processing unit processes the background image light rays accordingly, and the processed background image light rays are then incident on the second optical processing unit. The foreground image displayed in the second display area is incident on the second optical processing unit in the form of light rays. The processed background image light rays and the foreground image light rays are emitted from the same light-emitting position in the second optical processing unit in the same direction. The background image light needs to be processed by the first and second optical processing units, while the foreground image light only needs to be processed by the second optical processing unit. Consequently, the propagation distance of the background image light to the light-emitting position is greater than that of the foreground image light. The distance between the imaging position and the light-emitting position of the background image is also greater than that of the imaging position and the light-emitting position of the foreground image. This results in the background image appearing more distant and the foreground image appearing closer. When viewed from different angles, the relative positions of the background and foreground images differ, giving the displayed image a stereoscopic effect. Furthermore, the foreground and background images are separate and independent; pixel display does not require the superposition of two specific light rays. Therefore, vibration of the display device will not affect the clarity of the displayed pixels. Thus, the solution of this application embodiment can prevent image blurring caused by vibration when displaying images with a stereoscopic effect. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0047] Figure 3 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0048] Figure 4 This is a schematic diagram of an image displayed by a display device according to an embodiment of this application;

[0049] Figure 5 This is a schematic diagram of an image displayed by a display device according to an embodiment of this application;

[0050] Figure 6 This is a schematic diagram illustrating the imaging principle of a display device according to an embodiment of this application;

[0051] Figure 7This is a schematic diagram illustrating the imaging principle of a display device according to an embodiment of this application;

[0052] Figure 8 This is a schematic diagram illustrating the imaging principle of a display device according to an embodiment of this application;

[0053] Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0054] Figure 10 This is a schematic diagram illustrating the imaging principle of a display device according to an embodiment of this application;

[0055] Figure 11 This is a schematic diagram illustrating the imaging principle of a display device according to an embodiment of this application;

[0056] Figure 12 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0057] Figure 13 This is a schematic diagram illustrating the imaging principle of a display device provided in an embodiment of this application.

[0058] Legend

[0059] 1. Display screen; 2. First optical processing unit; 3. Second optical processing unit; 4. Visible area;

[0060] 11. First display area; 12. Second display area; 13. Light-absorbing film;

[0061] 21. First reflective polarizing image splitter; 22. λ / 4 glass slide; 23. Reflecting mirror;

[0062] 31. Second reflective polarization image splitter;

[0063] 11a, the first edge of the first display area; 12a, the second edge of the second display area;

[0064] 21a, the first side of the first reflective polarization image splitter; 31a, the second side of the second reflective polarization image splitter. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0066] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described objects changes, the relative positional relationship may also change accordingly.

[0067] This application provides a display device that can display images with a stereoscopic effect.

[0068] Figure 1 This is a schematic diagram of the structure of a display device shown in an embodiment of this application, such as... Figure 1 As shown, the display device includes a display screen 1, a first optical processing unit 2, and a second optical processing unit 3.

[0069] The display screen 1 includes a first display area 11 and a second display area 12 (the dotted line in the figure is the dividing line between the first display area 11 and the second display area 12), and these two display areas display the background image and the foreground image, respectively.

[0070] The first optical processing unit 2 is located in the light-emitting direction of the first display area 11. Its function is to adjust the polarization direction of the background image light emitted into the first display area 11 by a specified angle, and to direct the background image light after the polarization direction adjustment to the second optical processing unit 3.

[0071] The second optical processing unit 3 is located in the light-emitting direction of the second display area 12. Its function is to reflect and transmit the two sets of light respectively based on the difference in polarization direction between the foreground image light incident on the second display area 12 and the background image light incident by the first optical processing unit 2 after adjusting the polarization direction, so that the two sets of light are emitted out in the same position and in the same direction.

[0072] The following section, using Structure 1 as an example, describes each part of the display device in detail. (See also:) Figure 2 .

[0073] 1. Display Screen

[0074] Display screen 1 can be an LCD display screen, and the light emitted by the LCD display screen is linearly polarized light with a certain polarization direction. Display screen 1 can also be a flat panel display screen. Display screen 1 can include a first display area 11 and a second display area 12, and these two display areas have the same polarization direction.

[0075] Optionally, the display screen 1 can be an OLED display screen with a polarizer or an LED display screen with a polarizer. The polarizer is located in the light-emitting direction of the OLED or LED display screen, and its function is to convert the circularly polarized light transmitted through it into linearly polarized light. Both OLED and LED displays emit circularly polarized light. When the display screen 1 is an OLED or LED display screen with a polarizer, the circularly polarized light emitted by the OLED or LED display screen can be converted into linearly polarized light with a specific polarization direction after passing through the polarizer. In practice, a single polarizer can be used to cover the entire display screen 1, ensuring that all light emitted from the display screen 1 is linearly polarized light with the same polarization direction.

[0076] This application does not limit the type of display screen 1; in the following text, an LCD display screen is used as an example.

[0077] The display screen 1 may include a first display area 11 and a second display area 12, which are located in the same plane. The first display area 11 and the second display area 12 are two display portions of the same display panel (i.e., the display screen 1 includes one display panel), or they may be two independent display panels (i.e., the display screen 1 includes two display panels). The first display area 11 and the second display area 12 may be the same size or different sizes. The first display area 11 and the second display area 12 may be adjacent to each other or may be spaced apart.

[0078] II. First Optical Processing Unit 2

[0079] like Figure 2 As shown, the first optical processing unit 2 may include a first reflective polarizing image splitter 21, a λ / 4 glass plate 22, and a reflector 23. Background image light rays incident on the first display area 11 will sequentially pass through the first reflective polarizing image splitter 21, the λ / 4 glass plate 22, and the reflector 23. Specifically, for the background image light rays, the light rays before their first transmission through the λ / 4 glass plate are first background image light rays; the light rays after their first transmission through the λ / 4 glass plate until their second transmission through the λ / 4 glass plate are second background image light rays; and the light rays after their second transmission through the λ / 4 glass plate are third background image light rays.

[0080] First reflective polarization image separator 21

[0081] The first reflective polarizing image splitter 21 is used to reflect the light from the first background image incident on the first display area 11 in a first direction. The first direction can be the direction in which the first reflective polarizing image splitter faces the λ / 4 glass plate.

[0082] The first reflective polarization image separator 21 has mutually orthogonal transmission polarization directions and reflection polarization directions. The transmission polarization direction refers to a specific polarization direction; when linearly polarized light has this polarization direction, the reflective polarization image separator will completely transmit the linearly polarized light. The reflection polarization direction refers to a specific polarization direction; when linearly polarized light has this polarization direction, the reflective polarization image separator will completely reflect the linearly polarized light. When light rays with different polarization directions enter the first reflective polarization image separator 21, the first reflective polarization image separator 21 may transmit, reflect, or simultaneously reflect and transmit the light rays. When the polarization direction of the light is the same as the transmission polarization direction of the first reflective polarization image splitter 21, the first reflective polarization image splitter 21 can completely transmit the light; when the polarization direction of the light is the same as the reflection polarization direction of the first reflective polarization image splitter 21, the first reflective polarization image splitter 21 can completely reflect the light; when the polarization direction of the light is between the above-mentioned transmission polarization direction and reflection polarization direction, the light can be orthogonally decomposed into a first component light and a second component light, wherein the polarization direction of the first component light is the same as the above-mentioned transmission polarization direction, and the second component light is the same as the above-mentioned reflection polarization direction. Then, the first reflective polarization image splitter 21 can transmit the first component light and reflect the second component light.

[0083] like Figure 2 As shown, the first reflective polarizing image separator 21 can be a rectangular thin sheet, located in the light-emitting direction of the first display area 11. The first side 21a of the first reflective polarizing image separator 21 can be located at the first edge 11a of the first display area 11 and connected to the display screen 1. The first side 21a is the side of the first reflective polarizing image separator 21 closest to the display screen 1, and the first edge 11a is the edge of the first display area 11 closest to the second display area 12. The first reflective polarizing image separator 21 can be at a specific angle to the first display area 11, for example, 45°.

[0084] For the first reflective polarization image splitter 21, the reflected polarization direction of the first reflective polarization image splitter 21 can be set as the first polarization direction, and the transmitted polarization direction of the first reflective polarization image splitter 21 can be set as the second polarization direction. The first polarization direction is the same as the polarization direction of the first display area 11, and the first polarization direction is orthogonal to the second polarization direction.

[0085] The first reflective polarizing image splitter 21 can be a reflective polarizing brightness enhancement film, such as a dual brightness enhancement film (DBEF) or an advanced polarization conversion film (APCF). Compared with ordinary polarizing films, DBEF and APCF have very high transmittance and reflectance, which can effectively improve the brightness of the background image displayed by the display device. The type of reflective polarizing brightness enhancement film used in the first reflective polarizing image splitter 21 is not limited in this application embodiment.

[0086] λ / 4 glass slide 22

[0087] The λ / 4 glass slide 22 is used to adjust the polarization direction of the transmitted light by 45°, that is, the angle of polarization of the light passing through the λ / 4 glass slide will increase by 45°.

[0088] like Figure 2 As shown, the λ / 4 glass slide 22 can be located between the first reflective polarizing image splitter 21 and the reflector 23, and is in contact with the reflector 23. At the same time, the λ / 4 glass slide 22 can be closely attached to the side of the reflector 23 closest to the first reflective polarizing image splitter 21.

[0089] Mirror 23

[0090] The reflector 23 is used to reflect the light rays of the first background image that are incident along the first direction to the second direction. The reflector 23 can also reflect the light rays of the second background image, and the process of the reflector 23 reflecting the light rays of the second background image does not change the polarization direction of the light rays of the second background image.

[0091] like Figure 2 As shown, the reflector 23 can be placed perpendicular to the display screen 1. The reflector 23 can be located at the edge of the first display area 11 away from the second display area 12 and is attached to the display screen 1.

[0092] Reflector 23 can be a mirror or a retroreflector.

[0093] III. Second Optical Processing Unit 3

[0094] like Figure 2 As shown, the second optical processing unit 3 may include a second reflective polarization image splitter 31.

[0095] Second reflective polarization image separator 31

[0096] The second reflective polarizing image splitter 31 is used to reflect the foreground image light incident on the second display area 12 in a second direction, and to transmit the third background image light along the second direction. The second direction can be from the reflector 23 toward the first reflective polarizing image splitter 21.

[0097] The second reflective polarization image separator 31 has mutually orthogonal transmission polarization directions and reflection polarization directions, and the transmission polarization direction and reflection polarization direction of the second reflective polarization image separator 31 can be the same as those of the first reflective polarization image separator 21. When light rays with different polarization directions enter the second reflective polarization image separator 21, the second reflective polarization image separator 31 may transmit, reflect, or simultaneously reflect and transmit the light rays. When the polarization direction of the light is the same as the transmission polarization direction of the second reflective polarization image splitter 31, the second reflective polarization image splitter 31 can completely transmit the light; when the polarization direction of the light is the same as the reflection polarization direction of the second reflective polarization image splitter 31, the second reflective polarization image splitter 31 can completely reflect the light; when the polarization direction of the light is between the above-mentioned transmission polarization direction and reflection polarization direction, the light can be orthogonally decomposed into a first component light and a second component light, wherein the polarization direction of the first component light is the same as the above-mentioned transmission polarization direction, and the polarization direction of the second component light is the same as the above-mentioned reflection polarization direction. Then, the second reflective polarization image splitter 31 can transmit the first component light and reflect the second component light.

[0098] like Figure 2 As shown, the second reflective polarizing image separator 31 can be a rectangular thin sheet. The second reflective polarizing image separator 31 can be located in the light-emitting direction of the second display area 12 and in the second direction of the first reflective polarizing image separator 21. The second reflective polarizing image separator 31 can be placed perpendicular to the first reflective polarizing image separator 21, and the second side 31a of the second reflective polarizing image separator 31 is located at the second edge 12a of the second display area 12 and is connected to the display screen 1. The second side 31a is the side of the second reflective polarizing image separator 31 closest to the display screen 1, and the second edge 12a is the edge of the second display area 12 closest to the first display area 11. The second reflective polarizing image separator 31 can be at a specific angle to the second display area 12, for example, 45°.

[0099] For the second reflective polarization image splitter 31, the reflected polarization direction of the second reflective polarization image splitter 31 can be set as the first polarization direction, and the transmitted polarization direction of the second reflective polarization image splitter 31 can be set as the second polarization direction.

[0100] The second reflective polarizing image separator 31 can be a reflective polarizing brightness enhancement film, such as a dual brightness enhancement film (DBEF) or an advanced polarization conversion film (APCF). Compared with ordinary polarizing films, DBEF and APCF have very high transmittance and reflectance, which can effectively improve the brightness of the background image displayed by the display device. The type of reflective polarizing brightness enhancement film used in the second reflective polarizing image separator 31 is not limited in this application embodiment.

[0101] The first reflective polarization image splitter 21 and the second reflective polarization image splitter 31 can form a reflective polarization image splitter group. In the reflective polarization image splitter group, the first reflective polarization image splitter 21 and the second reflective polarization image splitter 31 can be connected or have a certain distance D between them.

[0102] The first reflective polarizing image splitter 21 and the second reflective polarizing image splitter 31 can both be connected to the display screen 1. The connection between the first reflective polarizing image splitter 21 and the second reflective polarizing image splitter 31 and the display screen 1 can be by adhesive bonding, or by setting multiple fixing grooves inside the housing of the display device, using these fixing grooves to snap the first reflective polarizing image splitter 21 and the second reflective polarizing image splitter 31 into preset positions, so that the first reflective polarizing image splitter 21 and the second reflective polarizing image splitter 31 are both connected to the display screen 1. Alternatively, the first reflective polarizing image splitter 21 and the second reflective polarizing image splitter 31 can not be connected to the display screen 1, that is, there is a gap H between the reflective polarizing image splitter assembly and the display screen 1.

[0103] The display device may also include a housing for fixing the aforementioned display screen 1, the first reflective polarizing image splitter 21, the λ / 4 glass slide 22, the reflector 23, and the second reflective polarizing image splitter 31. The housing may also be used to prevent external impurities (such as dust) from entering the interior of the display device.

[0104] The housing can have a hexahedral structure and be hollow inside. The inner wall of the housing can also include multiple fixing grooves. Positioning protrusions can be respectively provided on the display screen 1, the first reflective polarizing image splitter 21, the λ / 4 glass slide 22, the reflector 23, and the second reflective polarizing image splitter 31. When installing the display device, the positioning protrusions can be snapped into the fixing grooves to fix the display screen 1, the first reflective polarizing image splitter 21, the λ / 4 glass slide 22, the reflector 23, and the second reflective polarizing image splitter 31.

[0105] The display screen 1, the first reflective polarizing image splitter 21, the λ / 4 glass slide 22, the reflector 23, and the second reflective polarizing image splitter 31 can also be directly fixed to the corresponding positions on the inner wall of the housing by adhesive.

[0106] The shell can be made of hot melt plastic. When processing the shell, the hot melt plastic raw material can be heated first to make it melted. Then, the molten hot melt plastic raw material is injected into a pre-processed mold to complete the processing of the shell.

[0107] The casing can also be made of various metals with good ductility, such as aluminum. The processing method for metal casings is the same as that for hot-melt plastic casings, and will not be repeated here.

[0108] The angular relationship between the display screen 1, the first reflective polarizing image splitter 21, the second reflective polarizing image splitter 31, and the reflector 23 in the above structure 1 will be explained below.

[0109] like Figure 3 As shown, the first reflective polarization image splitter 21 is at a first angle to the first display area 11, the second reflective polarization image splitter 31 is at a second angle to the second display area 12, and the reflector 23 is at a third angle to the first reflective polarization image splitter 21. The first angle and the third angle are equal, and the first angle and the second angle are complementary.

[0110] The first angle, the second angle, and the third angle are θ1, θ2, and θ3, respectively.

[0111] Since both the first display area 11 and the second display area 12 emit background and foreground light rays perpendicularly, θ4+θ2=90° and θ5+θ1=90°.

[0112] Since the incident angle and the exit angle are the same, we have θ4 = θ6 = θ8, θ5 = θ7 = θ9. Because θ1 + θ2 = 90°, then θ8 + θ9 = 90°, which means θ4 + θ7 = 90°. Also, because θ4 + θ2 = 90°, then θ2 = θ7. And because θ1 = θ3 and θ1 + θ2 = 90°, then θ7 + θ3 = 90°.

[0113] In this way, the foreground and background light rays reaching the visible area 4 are both perpendicular to the visible area 4. Consequently, when observed from the visible area 4, both the foreground and background images appear parallel to the visible area 4. Furthermore, since the display device may include other functional units, the display screen 1 and the reflector 23 may not be perpendicular. In this case, the angle between the display screen 1 and the reflector 23 can be flexibly set according to the placement of the functional units inside the display device, thereby enabling the display device to be miniaturized.

[0114] As described above, the polarization direction of the background image light rays and the foreground image light rays emitted by the first display area 11 and the second display area 12 is the first polarization direction. The propagation process of these two types of light rays in the display device will be described in detail below:

[0115] (1) Regarding the lighting in the background image:

[0116] 1a. The first display area 11 emits a first background image light. After the first background image light reaches the first reflective polarization image separation plate 21, since the polarization direction of the first background image light is the same as the reflection polarization direction of the first reflective polarization image separation plate 21, the first reflective polarization image separation plate 21 completely reflects the first background image light along the first direction. Then, the first background image light is directed towards the λ / 4 glass slide 22 along the first direction.

[0117] 1b, the first background image light reaches the λ / 4 glass plate 22. After passing through the λ / 4 glass plate 22, the first background image light is transformed into a second background image light, wherein the difference in polarization direction between the second background image light and the first background image light is 45°. Then, the second background image light is incident on the reflector 23 along the first direction.

[0118] 1c, the light from the second background image reaches the reflecting mirror 23, and the reflecting mirror 23 reflects the light from the second background image along the second direction. During the reflection of the light from the second background image by the reflecting mirror 23, the polarization direction of the light from the second background image remains unchanged. Then, the light from the second background image is incident on the λ / 4 glass plate 22 along the second direction.

[0119] 1d, the second background image light, after being transmitted through the λ / 4 glass plate, is transformed into the third background image light, wherein the difference in polarization direction between the third background image light and the second background image light is 45°. Then, the third background image light is incident on the first reflective polarization image separation plate 21 along the second direction.

[0120] 1e, the light from the third background image reaches the first reflective polarization image separator 21. At this time, the polarization direction of the third background image light is the same as that of the transmission polarization direction of the first reflective polarization image separator 21, and the third background image light passes through the first reflective polarization image separator 21. Then, the third background image light is directed towards the second reflective polarization image separator 31 along the second direction.

[0121] 1f, the light from the third background image reaches the second reflective polarization image splitter 31. At this time, the light from the third background image has the same transmission polarization direction as the second reflective polarization image splitter 31. The light from the third background image passes through the second reflective polarization image splitter 31 and finally reaches the visible area 4.

[0122] (2) For the foreground image light:

[0123] The second display area 12 emits foreground image light to the second reflective polarization image splitter 31. After the foreground image light reaches the second reflective polarization image splitter 31, since the polarization direction of the foreground image light is the same as the reflection polarization direction of the second reflective polarization image splitter 31, the second reflective polarization image splitter 31 completely reflects the foreground image light along the second direction, and the foreground image light reaches the visible area 4.

[0124] Once both the foreground and background light rays reach the visible area 4, the image displayed by the device can be viewed from different angles within the visible area 4. During the propagation of the background and foreground light rays, the distance the background light rays travel to the visible area 4 is greater than that of the foreground light rays. Consequently, the distance between the imaging position of the background image and the visible area 4 is greater than that of the foreground image. This results in the background image appearing farther away and the foreground image appearing closer. The relative positions of the background and foreground images differ depending on the viewing angle, creating a three-dimensional effect on the displayed image.

[0125] like Figure 4 and Figure 5 As shown, the foreground and background images are completely different images. The foreground image contains an image of an astronaut, while the background image contains an image of the moon. Figure 4 and Figure 5 These are the images seen from the left and right sides of the visible area 4, respectively. Figure 4 and Figure 5 As can be seen, the relative positions of the background and foreground images are different when viewed from different angles, and the images displayed by the display device have a stereoscopic effect.

[0126] The visual distances of the foreground and background images are described below for the cases where mirror 23 is a specular mirror and a retroreflector, respectively.

[0127] Mirror

[0128] by Figure 6 For reference, taking the first display area 11 and the second display area 12 as having the same size, the distance between the first display area 11 and the second display area 12 as D, the reflective polarization image separation plate group connected to the display screen 1, and the first reflective polarization image separation plate 21 and the second reflective polarization image separation plate 31 both at a 45° angle to the display screen 1 as an example, the principle of the display device presenting a stereoscopic image will be introduced:

[0129] like Figure 6As shown, based on optical principles, the background image corresponds to a virtual image of the background image, located at the imaging position of the background image, and the foreground image corresponds to a virtual image of the foreground image, located at the imaging position of the foreground image. From a visual perspective, when a person views the visible area 4, it is as if the background image is displayed at the imaging position of the background image, and the foreground image is displayed at the imaging position of the foreground image. The distance between the virtual image of the background image and the mirror is b, and the virtual image of the background image is located on the side of the mirror that is not covered with the λ / 4 glass plate 22. Here, b is the display width of the first display area. The distance between the virtual image of the foreground image and the mirror is D+b, and the virtual image of the foreground image is located on the side of the mirror that is covered with the λ / 4 glass plate 22. Here, D is the distance between the first display area 11 and the second display area 12. At this time, the distance between the virtual image of the background image and the virtual image of the foreground image is D+2b. This distance is relatively large and is suitable for scenarios where the foreground and background images need to have a large visual distance (e.g., the foreground and background images are people and distant mountains). It can show a large sense of distance between the foreground and background images.

[0130] Optionally, such as Figure 7 As shown, the first edge 11a of the first display area 11 and the second edge 12a of the second display area 12 can be touching, i.e., D=0. At this time, the distance between the virtual image of the background image and the virtual image of the foreground image is equal to 2b. Based on the above, it can be seen that the distance between the foreground image and the background image is related to the distance D between the first edge 11a and the second edge 12a. Therefore, different intervals D can be set between the first edge 11a and the second edge 12a according to actual needs, so that the foreground image and the background image can show different senses of distance, thereby improving the stereoscopic effect of the image displayed by the display device.

[0131] For example, the foreground image displayed in the first display area 11 can be a tourist, and the background image displayed in the second display area 12 can be any scenery, such as a mountain or waterfall. When the interval D between the first edge 11a and the second edge 12a is different, the sense of distance between the foreground image and the background image displayed by the display device is different.

[0132] retroreflector

[0133] The following is based on Figure 8 For reference, taking the first display area 11 and the second display area 12 as having the same size, the distance between the first display area 11 and the second display area 12 as D, the reflective polarization image splitter connected to the display screen 1, and both the first reflective polarization image splitter 21 and the second reflective polarization image splitter 31 at a 45° angle to the display screen 1 as an example, the principle of the display device presenting a stereoscopic image will be introduced:

[0134] Due to the characteristics of the retroreflector, the light from the background image forms a real image of the background image. This real image is at a distance of b from the retroreflector and is located on the side of the retroreflector with the λ / 4 glass plate 22 attached. Here, b is the display width of the first display area. The virtual image of the foreground image is at a distance of D+b from the retroreflector and is also located on the side of the retroreflector with the λ / 4 glass plate 22 attached. Here, D is the distance between the first display area 11 and the second display area 12, and b is the display width of the first display area. At this time, the distance D between the virtual image of the background image and the virtual image of the foreground image is smaller than D+2b above. This distance is suitable for scenarios where the foreground and background images do not require a large visual distance (e.g., two people standing in front of and behind each other). In this case, the foreground and background images are superimposed, and the user can view an image with a clear stereoscopic effect through the visible area 4.

[0135] When the reflector is a retroreflector, if the first edge 11a of the first display area 11 and the second edge 12a of the second display area 12 are in contact, although there is no distance between the first edge 11a and the second edge 12a, because the first reflective polarization image separation plate 21 and the second reflective polarization image separation plate 31 have a certain thickness, there is still a slight distance between the virtual image of the foreground image and the real image of the background image, so that the user can view the superimposed image with a stereoscopic effect through the visible area 4.

[0136] In this embodiment of the application, for cases where there is a distance H between the reflective polarizing image splitter assembly and the display screen 1 (e.g.) Figure 9 As shown, a light-absorbing film 13 can be provided between the first display area 11 and the second display area 12. The light-absorbing film 13 can block the propagation of light between the first display area 11 and the second display area 12.

[0137] The light-absorbing film 13 can be perpendicular to the display screen 1. The light-absorbing film 13 may include a black light-absorbing layer and multiple functional layers with progressively decreasing refractive indices. The light-absorbing layers are located between the functional layers, and the closer a functional layer is to the light-absorbing layer, the lower its refractive index. As light passes through each functional layer, it gradually diverges as the refractive index decreases, reducing the amount of transmitted light. When the light reaches the black light-absorbing layer, its brightness is low, and it cannot pass through the black light-absorbing layer, thus blocking light propagation between the first display area 11 and the second display area 12. In this way, different spacing H can be set. When the spacing H is large, the distance between the light emitted from the display screen 1 and the optical processing unit is longer, resulting in smaller background and foreground images displayed in the visible area 4. Conversely, when H is small, the background and foreground images displayed in the visible area 4 are larger.

[0138] In this embodiment, when the first display area 11 and the second display area 12 are of different sizes, a first telescopic mechanism can be provided to adjust the distance between the first reflective polarizing image splitter 21 and the display screen 1, thereby adjusting the positional relationship between the background image and the foreground image. The fixed end of the first telescopic mechanism can be fixedly connected to the display screen 1 or the housing, and the telescopic end of the first telescopic mechanism can be fixedly connected to the first reflective polarizing image splitter 21. The telescopic direction of the first telescopic mechanism can be perpendicular to the display screen 1. Figure 10 As shown, when the first reflective polarizing image splitter 21 is in the first position, the real image of the background is in the third position. At this time, when observed from the visible area 4, the background image is above the foreground image. When the first reflective polarizing image splitter 21 is in the second position, the real image of the background is in the fourth position. At this time, when observed from the visible area 4, the background image is below the foreground image. Figure 10 The explanation uses a retroreflector as an example. The situation is similar when using a mirror mirror, and the first telescopic mechanism can also be used. It will not be described in detail here.

[0139] Optionally, if the first display area 11 and the second display area 12 are of different sizes, a second telescopic mechanism can be provided to adjust the distance between the first reflective polarizing image splitter 21 and the second edge 12a of the second display area 12, thereby adjusting the visual distance between the background image and the foreground image. The fixed end of the second telescopic mechanism can be fixedly connected to the display screen 1 or the housing, the telescopic end of the second telescopic mechanism can be fixedly connected to the first reflective polarizing image splitter 21, and the telescopic direction of the second telescopic mechanism can be parallel to the display screen 1. Figure 11 As shown, when the first reflective polarizing image splitter 21 is in the fifth position, the background image displayed in the first display area 11 is in the sixth position, and correspondingly, the real image of the background is in the seventh position. At this time, when observed from the viewing area 4, the visual distance between the background image and the foreground image is relatively far. However, when the first reflective polarizing image splitter 21 is in the eighth position, the background image displayed in the first display area 11 is in the ninth position, and correspondingly, the real image of the background is in the tenth position. At this time, when observed from the viewing area 4, the visual distance between the background image and the foreground image is relatively close. Figure 11 This explanation uses a retroreflector as an example. The situation is similar when using a mirror mirror, and the second telescopic mechanism can also be used. It will not be elaborated here.

[0140] The following section, referring to Structure 2, will introduce each part of the display device separately. (See also...) Figure 12 .

[0141] 1. Display Screen

[0142] Structure 2 is the same as display screen 1 in Structure 1. Please refer to the description of display screen 1 in Structure 1. It will not be repeated here.

[0143] II. First Optical Processing Unit 2

[0144] like Figure 12 As shown, the first optical processing unit 2 includes a λ / 4 glass plate 22 and a reflector 23.

[0145] λ / 4 glass slide 22

[0146] Structure 2 is the same as the λ / 4 glass slide 22 in Structure 1. Please refer to the description of the λ / 4 glass slide 22 in Structure 1. It will not be repeated here.

[0147] Mirror 23

[0148] The reflector 23 is a mirror reflector used to reflect the background image light emitted from the first display area 11 and transmitted through the optical glass plate 22 to a third direction. Furthermore, the process of reflecting the background image light by the reflector 23 does not change the polarization direction of the background image light. The third direction is the direction from the first optical processing unit 2 towards the second optical processing unit 3.

[0149] The reflector 23 is attached to the λ / 4 glass slide 22. The connection between the reflector 23 and the λ / 4 glass slide 22 can be by bonding or other methods. In this embodiment, the connection method between the λ / 4 glass slide 22 and the reflector 23 is not limited.

[0150] like Figure 12 As shown, the reflector 23 is located in the light-emitting direction of the first display area 11, and one end of the reflector 23 is connected to the side of the display area 11 away from the second display area 12. The reflector 23 is at a 45° angle to the first display area 11.

[0151] III. Second Optical Processing Unit 3

[0152] like Figure 12 As shown, the second optical processing unit 3 may include a second reflective polarization image splitter 31.

[0153] Second reflective polarization image separator 31

[0154] The second reflective polarization image splitter 31 is used to reflect the foreground image light incident on the second display area 12 in a third direction, and to transmit the background image light along the third direction.

[0155] The second reflective polarization image separator 31 has mutually orthogonal transmission polarization directions and reflection polarization directions. Light rays with different polarization directions enter the first reflective polarization image separator 21, and the second reflective polarization image separator 31 may transmit, reflect, or simultaneously reflect and transmit the light rays. When the polarization direction of the light ray is the same as the transmission polarization direction of the second reflective polarization image separator 31, the second reflective polarization image separator 31 can completely transmit the light ray; when the polarization direction of the light ray is the same as the reflection polarization direction of the second reflective polarization image separator 31, the second reflective polarization image separator 31 can completely reflect the light ray; when the polarization direction of the light ray is between the aforementioned transmission polarization direction and reflection polarization direction, the light ray can be orthogonally decomposed into a first component light ray and a second component light ray, wherein the polarization direction of the first component light ray is the same as the aforementioned transmission polarization direction, and the polarization direction of the second component light ray is the same as the aforementioned reflection polarization direction. Then, the second reflective polarization image separator 31 can transmit the first component light ray and reflect the second component light ray.

[0156] like Figure 12 As shown, the second reflective polarizing image separator 31 can be a rectangular thin sheet. The second reflective polarizing image separator 31 can be located in the light-emitting direction of the second display area 12 and in the third direction of the reflector 23. The second reflective polarizing image separator 31 can be placed parallel to the reflector 23, and the second side 31a of the second reflective polarizing image separator 31 is located at the second edge 12a of the second display area 12 and is connected to the display screen 1. The second side 31a is the side of the second reflective polarizing image separator 31 closest to the display screen 1, and the second edge 12a is the edge of the second display area 12 closest to the first display area 11.

[0157] For the second reflective polarization image splitter 31, the reflected polarization direction of the second reflective polarization image splitter 31 can be set as the first polarization direction, and the transmitted polarization direction of the second reflective polarization image splitter 31 can be set as the second polarization direction.

[0158] The second reflective polarization image splitter 31 can be a dual brightness enhancement film (DBEF) or an advanced polarization conversion film (APCF). Compared with ordinary polarizing films, DBEF and APCF have very high transmittance and reflectance, which can effectively improve the brightness of the background image displayed by the display device.

[0159] The following section provides a detailed explanation of the propagation process of background and foreground light rays within a display device:

[0160] The first display area 11 emits background image light. The specular mirror reflects the background image light emitted into the first display area 11 along a third direction. The background image light reflected by the specular mirror is transmitted through the λ / 4 glass plate 22 twice. Therefore, the polarization direction of the background image light reflected by the specular mirror is exactly the same as the transmission polarization direction of the second reflective polarization image splitter 31. The background image light can be completely transmitted through the second reflective polarization image splitter 31 and reaches the visible area 4.

[0161] The second display area 12 emits foreground image light. Since the polarization direction of the second reflective polarization image splitter 31 is the same as that of the second display area 12, the second reflective polarization image splitter 31 completely reflects the foreground image light emitted into the second display area 12 along the third direction, and the foreground image light reaches the visible area 4.

[0162] Once both the foreground and background light rays reach the visible area 4, the image displayed by the device can be viewed from different angles within the visible area 4. During the propagation of the background and foreground light rays, the distance the background light rays travel to the visible area 4 is greater than that of the foreground light rays. Consequently, the distance between the imaging position of the background image and the visible area 4 is greater than that of the foreground image. This results in the background image appearing farther away and the foreground image appearing closer. The relative positions of the background and foreground images differ depending on the viewing angle, creating a three-dimensional effect on the displayed image.

[0163] The following explanation, using the example of a certain distance D between the first display area 11 and the second display area 12, illustrates the principle of how a display device presents a stereoscopic image:

[0164] like Figure 13 As shown, based on optical principles, the background image corresponds to a virtual image of the background image, located at the imaging position of the background image, and the foreground image corresponds to a virtual image of the foreground image, located at the imaging position of the foreground image. From a visual perspective, when a person views the visible area 4, it is as if the background image is displayed at the imaging position of the background image, and the foreground image is displayed at the imaging position of the foreground image. The distance b between the virtual image of the background image and the plane containing the first edge 11a of the first display area 11 is located, and the virtual image of the background image is located on the side of the specular reflector where the λ / 4 glass plate 22 is not attached. The distance D between the virtual image of the foreground image and the plane containing the first edge 11a of the first display area 11 is located, and the virtual image of the foreground image is located on the side of the specular reflector where the λ / 4 glass plate 22 is attached. At this time, the distance between the virtual image of the background image and the virtual image of the foreground image is D+b, which is a moderate distance suitable for scenarios where the foreground and background images need to have a moderate visual distance.

[0165] Meanwhile, by adopting structure two, the entire display device only needs one reflective polarization image splitter to complete the display of stereoscopic images, which can reduce the space required for the display device.

[0166] Optionally, the first edge 11a of the first display area 11 and the second edge 12a of the second display area 12 can be adjacent, i.e., D = 0. Based on the above, it is known that the distance between the foreground image virtual image and the background image virtual image is related to the distance D between the first edge 11a and the second edge 12a. Therefore, different intervals D can be set between the first edge 11a and the second edge 12a according to actual needs, thereby creating different senses of distance between the foreground image and the background image, and thus improving the stereoscopic effect of the image displayed by the display device.

[0167] The various structural features of Structure 1 and Structure 2 mentioned above can be used individually or in combination.

[0168] The display device using this application includes a display screen 1, a first optical processing unit 2, and a second optical processing unit 3. The display screen 1 includes a first display area 11 and a second display area 12. The first display area 11 displays a background image, and the second display area 12 displays a foreground image. The background image displayed in the first display area 11 is incident on the first optical processing unit 2 in the form of light rays. The first optical processing unit 2 processes the background image light rays accordingly, and the processed background image light rays are incident on the second optical processing unit 3. The foreground image displayed in the second display area 12 is incident on the second optical processing unit 3 in the form of light rays. The processed background image light rays and the foreground image light rays are emitted from the same light-emitting position in the second optical processing unit 3 in the same direction. The background image light needs to be processed by the first optical processing unit 2 and the second optical processing unit 3, while the foreground image light only needs to be processed by the second optical processing unit 3. Consequently, the propagation distance of the background image light to the light-emitting position is greater than that of the foreground image light. The distance between the imaging position and the light-emitting position of the background image is also greater than that of the imaging position and the light-emitting position of the foreground image. This results in the background image appearing more distant and the foreground image appearing closer. When viewed from different angles, the relative positions of the background and foreground images differ, giving the displayed image a stereoscopic effect. Furthermore, the foreground and background images are, as their names suggest, separate and independent. The display of each pixel does not require the superposition of two specific light rays. Therefore, vibrations of the display device will not affect the clarity of the displayed pixels. Thus, the solution of this embodiment can prevent image blurring caused by vibration when displaying images with a stereoscopic effect.

[0169] This application provides an audio system that includes the aforementioned display device. The audio system may also include a cavity, a power amplifier unit, and a speaker unit.

[0170] The above description is merely one embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display device, characterized in that, The display device includes a display screen (1), a first optical processing unit (2), and a second optical processing unit (3); The display screen (1) includes a first display area (11) and a second display area (12). The display screen (1) is used to display a background image and a foreground image in the first display area (11) and the second display area (12) respectively. The different display areas of the display screen (1) have a uniform polarization direction. The first optical processing unit (2) includes a first reflective polarization image splitter (21), a λ / 4 glass plate (22), a reflector (23), and a first telescopic mechanism. The first reflective polarization image splitter (21) is located in the light-emitting direction of the first display area (11). The first reflective polarization image splitter (21) is used to reflect the background image light incident on the first display area (11) in a first direction. The λ / 4 glass plate (22) is located in the first direction of the first reflective polarization image splitter (21) and is located outside the light-emitting range of the first display area (11). The reflector (23) is located on the side of the λ / 4 glass plate (22) away from the first reflective polarization image splitter (21). The reflector (23) is used to reflect the light incident along the first direction in a second direction. The second direction is the direction toward the first reflective polarization image splitter (21). The first telescopic mechanism is used to adjust the distance between the first reflective polarization image splitter (21) and the first display area (11). The second optical processing unit (3) is located in the second direction of the first reflective polarization image splitter (21) and in the light-emitting direction of the second display area (12). The second optical processing unit (3) is used to reflect and transmit two sets of light respectively based on the difference in polarization direction between the foreground image light incident on the second display area (12) and the background image light incident by the first optical processing unit (2) after adjusting the polarization direction, so that the two sets of light are emitted out in the same position and in the same direction.

2. The display device according to claim 1, characterized in that, The second optical processing unit (3) includes a second reflective polarization image splitter (31), which is located in the light-emitting direction of the second display area (12). The second reflective polarization image splitter (31) is used to reflect the foreground image light incident on the second display area (12) in a second direction.

3. The display device according to claim 2, characterized in that, The first side (21a) of the first reflective polarization image splitter (21) is located at the first edge (11a) of the first display area (11) and is connected to the display screen (1). The first edge (11a) is the edge of the first display area (11) near the second display area (12). The second side (31a) of the second reflective polarization image splitter (31) is located at the second edge (12a) of the second display area (12) and is connected to the display screen (1). The second edge (12a) is the edge of the second display area (12) near the first display area (11).

4. The display device according to claim 3, characterized in that, There is a gap between the first edge (11a) and the second edge (12a).

5. The display device according to claim 3, characterized in that, The first edge (11a) is in contact with the second edge (12a).

6. The display device according to any one of claims 1 to 5, characterized in that, The reflector (23) is a specular reflector or a retroreflector.

7. The display device according to any one of claims 1 to 5, characterized in that, The λ / 4 glass slide (22) is attached to the reflector (23).

8. The display device according to any one of claims 2 to 5, characterized in that, The first reflective polarization image splitter (21) is at a first angle to the first display area (11), the second reflective polarization image splitter (31) is at a second angle to the second display area (12), and the reflector (23) is at a third angle to the first reflective polarization image splitter (21). The first angle and the third angle are equal, and the first angle and the second angle are complementary.

9. The display device according to claim 8, characterized in that, The first angle is equal to 45°.

10. The display device according to any one of claims 2 to 5, characterized in that, The polarization directions of the first reflective polarization image splitter (21) and the second reflective polarization image splitter (31) are the same as the polarization direction of the display screen (1).

11. The display device according to any one of claims 1 to 5, characterized in that, The display screen (1) is a flat panel display screen.

12. An audio device, characterized in that, The audio equipment includes the display device as described in any one of claims 1-11.

Images