Far and near field three-dimensional display device

Abstract

The utility model discloses a far and near field three-dimensional display device, which relates to the technical field of three-dimensional display, and comprises a first display module and a second display module which are oppositely arranged, the first display module is provided with an upper polaroid, and the light output path side of the first display module is provided with a DBEF film; the direction of the absorption axis of the DBEF film is consistent with that of the absorption axis of the upper polaroid of the first display module, and the direction of the linearly polarized light output by the second display module is consistent with that of the reflection axis of the DBEF film; the DBEF film is arranged on the first display module, the picture light of the first display module is completely transmitted through the DBEF film, the picture light of the second display module irradiates the first display module and is reflected through the DBEF film, human eyes see a synthesized picture image on the first display module, and the distance between the two images is different, so that the display effect is improved, and the display quality is improved. Different far and near fields are achieved, the stereoscopic display effect is further achieved, the image resolution is high, additional corollary equipment and a specific observation distance are not needed, and the watching experience of a user is improved.

Description

A near-field and far-field stereoscopic display device Technical Field

[0001] This utility model relates to the field of stereoscopic display technology, and in particular to a far-field and near-field stereoscopic display device. Background Technology

[0002] Stereoscopic display is a display method that uses technology to simulate the stereoscopic vision of the human eye, allowing viewers to perceive a three-dimensional (3D) depth effect. Its core principle is to utilize the binocular parallax of the human eye, that is, the left and right eyes receive images from different angles, and the brain generates a stereoscopic effect by fusing these two images.

[0003] Patent application number CN201821839995.0 discloses an LED polarized stereoscopic display screen, including a display component and a polarizing component. The polarizing component is bonded to the outer side of the display component. The polarizing component includes a first polarizing component and a second polarizing component. The first polarizing component is bonded to the display component, and the first polarizing component is bonded to the second polarizing component. By bonding the polarizing component to the display component, the traditional active display mode of large-screen LED is changed to polarized display, which helps to reduce the cost of the entire LED large-screen stereoscopic display system, and at the same time avoids the dizziness caused to users by active stereoscopic display.

[0004] However, with the rapid development of display technology, the display effect in stereoscopic display is always unsatisfactory. It either requires reduced display resolution, necessitates the use of 3D glasses, or requires viewing at a specific distance, imposing many limitations on existing stereoscopic display devices and affecting the viewing experience. Therefore, this utility model discloses a near-field and far-field stereoscopic display device to solve the above problems. Summary of the Invention

[0005] Therefore, it is necessary to provide a near-field and far-field stereoscopic display device to address the aforementioned technical problems. By setting a DBEF film on the first display module, all the light from the image of the first display module is transmitted through the DBEF film, while the light from the image of the second display module shines on the first display module and is reflected by the DBEF film. Thus, the human eye sees a composite image of the first and second display modules on the first display module, and the distance between the two images is different, thereby achieving a stereoscopic display effect with different near and far fields. The image resolution is high, no additional supporting equipment or specific viewing distance is required, and the user's viewing experience is improved.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A near-field and far-field stereoscopic display device includes a first display module and a second display module arranged opposite to each other. The first display module has an upper polarizer and a DBEF film is provided on the light output path side of the first display module. The absorption axis of the DBEF film is aligned with the absorption axis of the upper polarizer of the first display module. The linearly polarized light output by the second display module is aligned with the reflection axis of the DBEF film.

[0008] As a preferred embodiment of the near-field and far-field stereoscopic display device provided by this utility model, the first display module includes a backlight module, a TFT module and a cover plate stacked together. The TFT module includes a lower polarizer, a lower substrate, an upper substrate and an upper polarizer stacked together. The DBEF film is disposed between the cover plate and the upper polarizer, and the DBEF film and the upper polarizer are bonded and fixed by optical OCA adhesive.

[0009] As a preferred embodiment of the near-field and far-field stereoscopic display device provided by this utility model, the backlight module adopts an independent area backlight structure.

[0010] In a preferred embodiment of the near-field and far-field stereoscopic display device provided by this utility model, the display screen size of the first display module is the same as that of the second display module.

[0011] In a preferred embodiment of the near-field and far-field stereoscopic display device provided by this utility model, the first display module is positioned higher than the second display module, and the tilt direction of the first display module is opposite to that of the second display module.

[0012] In a preferred embodiment of the near-field and far-field stereoscopic display device provided by this utility model, the second display module is adjustable relative to the first display module.

[0013] As a preferred embodiment of the near-field and far-field stereoscopic display device provided by this utility model, it further includes a housing frame, the first display module is installed at one end of the housing frame, the second display module is installed at the other end of the housing frame, and the back side of the second display module is installed on a sliding frame, the sliding frame being slidably connected to the housing frame.

[0014] In a preferred embodiment of the near-field and far-field stereoscopic display device provided by this utility model, the outer shell frame is provided with a slide rail, the sliding frame slides along the slide rail, and a screw is movably connected to the outer shell frame, the screw being threadedly connected to the sliding frame.

[0015] In a preferred embodiment of the near-field and far-field stereoscopic display device provided by this utility model, one end of the screw is provided with a rotating handle.

[0016] In a preferred embodiment of the near-field and far-field stereoscopic display device provided by this utility model, the back sides of the first display module and the second display module are both fixedly connected to a back frame, and the back frames of the first display module and the second display module are rotatably connected to the outer shell frame and the sliding frame respectively through a rotating shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The near-field and far-field stereoscopic display device provided by this utility model, by setting a DBEF film on the first display module, allows all the light from the image of the first display module to be transmitted through the DBEF film, while the light from the image of the second display module is irradiated onto the first display module and reflected by the DBEF film. Thus, the human eye sees a composite image of the first and second display modules on the first display module, and the distance between the two images is different, realizing different near and far fields, thereby achieving a stereoscopic display effect. The image resolution is high, no additional supporting equipment or specific viewing distance is required, and the user's viewing experience is improved. Attached Figure Description

[0019] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 is a three-dimensional schematic diagram of the overall structure of the near-field and far-field stereoscopic display device provided by this utility model;

[0021] Figure 2 is a side view of the overall structure of the near-field and far-field stereoscopic display device provided by this utility model;

[0022] Figure 3 is a schematic diagram of the first display module in the near-field and far-field stereoscopic display device provided by this utility model;

[0023] Figure 4 is a schematic diagram of the light transmittance of the DBEF film perpendicular to the polarization direction in the near-field and far-field stereoscopic display device provided by this utility model.

[0024] Figure 5 is a schematic diagram of the light transmittance of the DBEF film with the same polarization direction in the near-field and far-field stereoscopic display device provided by this utility model.

[0025] The markings in the diagram are explained as follows:

[0026] 1. First display module; 2. Second display module; 3. Backlight module; 4. TFT module; 41. Lower polarizer; 42. Lower substrate; 43. Upper substrate; 44. Upper polarizer; 5. Cover plate; 6. DBEF film; 7. Optical OCA; 8. Housing frame; 9. Sliding frame; 10. Slide rail; 11. Screw; 12. Rotating handle; 13. Back frame; 14. Rotating shaft. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0028] As described in the background section, with the rapid development of display technology, the display effect of stereoscopic display is always unsatisfactory. It either reduces the display resolution, requires 3D glasses, or requires viewing at a specific distance, which makes existing stereoscopic display devices subject to many limitations and affects the viewing experience.

[0029] To solve this technical problem, this utility model provides a near-field and far-field stereoscopic display device, which is applied to the field of stereoscopic display technology.

[0030] Specifically, referring to Figures 1-3, the near-field and far-field stereoscopic display device includes a first display module 1 and a second display module 2 arranged opposite to each other. The first display module 1 has an upper polarizer 44 and a DBEF film 6 is provided on the light output path side of the first display module 1. The absorption axis of the DBEF film is consistent with the absorption axis direction of the upper polarizer 44 of the first display module 1. The linearly polarized light output by the second display module 2 is consistent with the reflection axis direction of the DBEF film 6.

[0031] The near-field and far-field stereoscopic display device provided by this utility model uses a DBEF film 6 on a first display module 1. All the light from the screen of the first display module 1 is transmitted through the DBEF film 6, while the light from the screen of the second display module 2 is reflected by the DBEF film 6 after shining on the first display module 1. Thus, the human eye sees a composite image of the first display module 1 and the second display module 2 on the first display module 1. The distance between the two images is different, achieving different near and far fields, thereby achieving a stereoscopic display effect. The image resolution is high, and no additional supporting equipment or specific viewing distance is required, thus improving the user's viewing experience.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] Example 1

[0036] Please refer to Figures 1-3. A near-field and far-field stereoscopic display device is provided, which includes a first display module 1 and a second display module 2. The first display module 1 and the second display module 2 are arranged opposite to each other. The first display module 1 is positioned higher than the second display module 2, and the tilt direction of the first display module 1 is opposite to the tilt direction of the second display module 2, so that the screen light from the second display module 2 can illuminate the first display module 1. The first display module 1 and the second display module 2 adopt the same structure, and the screen display sizes of the first display module 1 and the second display module 2 are the same. The first display module 1, taking the first display module 1 as an example, includes a backlight module 3, a TFT module 4, and a cover plate 5 stacked from bottom to top. The TFT module 4 includes a lower polarizer 41, a lower substrate 42, an upper substrate 43, and an upper polarizer 44 stacked together. A DBEF film 6 is provided on the light output path side of the first display module 1. Specifically, the DBEF film 6 is located between the cover plate 5 and the upper polarizer 44, and the DBEF film 6 and the upper polarizer 44 are bonded and fixed by optical OCA7 adhesive. The absorption axis of the DBEF film is aligned with that of the first display module 1. The absorption axis of the upper polarizer 44 is aligned with the direction of the polarization. The linearly polarized light output from the second display module 2 is aligned with the reflection axis of the DBEF film 6. The polarized light emitted by the second display module 2 is transversely polarized, perpendicular to the transmission axis (p-polarization) of the DBEF film. During operation, the light emitted by the first display module 1 is completely transmitted through the DBEF film and enters the human eye. The light emitted by the second display module 2 is reflected by the DBEF film 6 of the first display module 1 and enters the human eye. Specifically, the distance between the first display module 1 and the second display module 2 is D1. The distance between the human eyes is D2. The distance from the image of the second display module 2 to the human eyes is D1+D2. The distance from the image of the first display module 1 to the human eyes is D2. Ultimately, the human eyes will see the combined image emitted by the first display module 1 and the second display module 2 on the display plane of the first display module 1. The first display module 1 and the second display module 2 display specific content at specific positions. The two images are combined into one image. The combined image finally reaches the human eyes. The distance between the two images is different, thus realizing different near and far fields, thereby achieving a stereoscopic display effect.

[0037] DBEF film 6, or Dual Brightness Enhancement Film, is an optical thin film that achieves polarization-selective reflection and transmission through the interference effect of multiple nanoscale thin films. When unpolarized light is incident, the stacked films, through interference, produce Bragg reflection of light with a specific polarization direction (such as s-polarized light), while achieving efficient transmission of light with orthogonal polarization directions (such as p-polarized light). Here, s-polarization (lateral polarization) means the electric field vibration direction is perpendicular to the incident plane, and p-polarization (longitudinal polarization) means the electric field vibration direction is parallel to the incident plane. Specifically, the Dual Brightness Enhancement Film (DBEF film) achieves s-polarized light reflection and p-polarized light transmission through multilayer thin film interference. Its principle test is shown in Figures 4 and 5. In Figure 4, light perpendicular to the polarization direction has low transmittance, as all light is reflected; in Figure 5, light with the same polarization direction has high transmittance, as all light passes through.

[0038] Furthermore, both display modules employ local dimming backlights in their backlight modules 3, dividing the backlight into multiple independent areas. The brightness of each area is adjusted in real time according to the content of the image, achieving zoned backlight control. This works in conjunction with the liquid crystal layer, where the liquid crystal molecules are responsible for controlling the transmittance of each pixel, while the backlight zones provide the brightness basis. The combination of these two technologies achieves a higher dynamic range, resulting in better display effects for both display modules.

[0039] Example 2

[0040] The near-field and far-field stereoscopic display device provided in Embodiment 1 is further optimized. Specifically, as shown in Figures 1 and 2, the second display module 2 can move relative to the first display module 1, so that the distance D1 between the two display modules is adjustable, and the distance D1+D2 of the image emitted by the second display module 2 is also adjustable. This can optimize stereoscopic display, alleviate visual fatigue, enhance adaptability to multiple scenarios, and improve user experience.

[0041] Furthermore, both the first display module 1 and the second display module 2 are installed inside the housing frame 8. Specifically, the first display module 1 is installed at one end of the housing frame 8, and the second display module 2 is installed at the other end of the housing frame 8. The back side of the second display module 2 is installed on the sliding frame 9, which is slidably connected to the housing frame 8. The housing frame 8 is provided with a slide rail 10, which is located between the first display module 1 and the second display module 2. The sliding frame 9 slides along the slide rail 10. A screw 11 is movably connected to the housing frame 8 and is threadedly connected to the sliding frame 9. One end of the screw 11 is provided with a rotating handle 12. By rotating the rotating handle... 12 drives the screw 11 to rotate, thereby driving the sliding frame 9 to slide along the slide rail 10, which in turn drives the second display module 2 to move relative to the first display module 1, changing the distance between the first display module 1 and the second display module 2, thereby adjusting the distance D1+D2 from the image emitted by the second display module 2 to the human eye. In order to fix the sliding frame 9, the rotating handle 12 can be fixed to the outer casing 8, thus achieving the fixation of the sliding frame 9. The rotating handle 12 can be fixed by using a pin to connect the rotating handle 12 to the circumferentially distributed holes on the sliding frame 9, so as to prevent the rotating handle 12 from rotating.

[0042] Example 3

[0043] The near-field and far-field stereoscopic display device provided in Embodiment 2 is further optimized. Specifically, as shown in Figures 1 and 2, a back frame 13 is fixedly connected to the back side of both the first display module 1 and the second display module 2. The back frames 13 of the first display module 1 and the second display module 2 are rotatably connected to the outer shell frame 8 and the sliding frame 9 respectively through a rotating shaft 14. The tilt angle of the first display module 1 and the second display module 2 can be adjusted, and the rotating shaft 14 is resisted after the tilt angle is adjusted to achieve the purpose of fixation.

[0044] The working principle of the near-field and far-field stereoscopic display device provided by this utility model is as follows: A DBEF film 6 is attached to the surface of the first display module 1, so that the first display module 1 forms a display surface that transmits vertically polarized light and reflects other polarized light, especially with the highest reflectivity for horizontally polarized light. The first display module 1 and the second display module 2 are mounted on the housing frame 8. By setting the DBEF film 6 on the first display module 1, all the light from the image of the first display module 1 is transmitted through the DBEF film 6, and the light from the image of the second display module 2 shines on the first display module 1 and is reflected by the DBEF film 6. Thus, the human eye sees a composite image of the first display module 1 and the second display module 2 on the first display module 1. The distance between the two images is different, realizing different near and far fields, thereby achieving a stereoscopic display effect. The image resolution is high, no additional supporting equipment or specific viewing distance is required, and the user's viewing experience is improved.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A far and near field stereoscopic display device, characterized by, The device includes a first display module and a second display module arranged opposite to each other. The first display module has an upper polarizer and a DBEF film is provided on the light output path side of the first display module. The absorption axis of the DBEF film is consistent with the absorption axis of the upper polarizer of the first display module. The linearly polarized light output by the second display module is consistent with the reflection axis of the DBEF film.

2. A far and near field volumetric display device according to claim 1, wherein, The first display module includes a backlight module, a TFT module and a cover plate stacked together. The TFT module includes a lower polarizer, a lower substrate, an upper substrate and an upper polarizer stacked together. The DBEF film is disposed between the cover plate and the upper polarizer, and the DBEF film and the upper polarizer are bonded and fixed by optical OCA adhesive.

3. A near-field and far-field stereoscopic display device according to claim 2, characterized in that, The backlight module adopts an independent area backlight structure.

4. A far and near field stereoscopic display device according to claim 1, wherein, The display screen size of the first display module is the same as that of the second display module.

5. A near-field and far-field stereoscopic display device according to claim 1, characterized in that, The first display module is positioned higher than the second display module, and the tilt direction of the first display module is opposite to that of the second display module.

6. A far and near field stereoscopic display device according to claim 1, wherein, The second display module is adjustable relative to the first display module.

7. A near-field and far-field stereoscopic display device according to claim 6, characterized in that, It also includes a housing frame, with the first display module mounted at one end of the housing frame, the second display module mounted at the other end of the housing frame, and the back side of the second display module mounted on a sliding frame, the sliding frame being slidably connected to the housing frame.

8. A far and near field stereoscopic display device according to claim 7, wherein, The outer casing is provided with a slide rail, the sliding frame slides along the slide rail, and a screw is movably connected to the outer casing, the screw being threadedly connected to the sliding frame.

9. A near-field and far-field stereoscopic display device according to claim 8, characterized in that, One end of the screw is equipped with a rotating handle.

10. A far and near field stereoscopic display device according to claim 7, wherein, The back of both the first display module and the second display module is fixedly connected to a back frame, and the back frames of the first display module and the second display module are rotatably connected to the outer shell frame and the sliding frame respectively through a rotating shaft.

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