Suspended display device and electronic equipment

Abstract

The present application relates to the field of display technology and discloses a suspended display device and electronic device, comprising: a flat panel display, a polarization splitter plate located on one side of the light-emitting surface of the flat panel display and having a set spacing from the flat panel display, and a retroreflective plate surrounding the flat panel display and the polarization splitter plate to form the side of the suspended display device; wherein a polarizing coating is provided on the light-emitting surface of the flat panel display; a quarter-wave plate is provided on the side of the retroreflective plate close to the interior of the suspended display device; and the polarization splitter plate is used to reflect the linearly polarized light emitted by the flat panel display to the retroreflective plate, and is also used to project the linearly polarized light reflected back by the retroreflective plate to form a suspended image. The above-mentioned suspended display device can achieve a suspended display with a wide viewing angle, can ensure the direction of the light beam and the position of the suspended display, and prevent the content of the flat panel display from being directly observed by the human eye. The entire device is low-cost, has a high sense of technology, and improves the user experience.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a suspension display device and electronic equipment. Background Art

[0002] With the advancement of display technology, people's demand for information is increasing, especially for visual information. Flat-panel displays have reached considerable maturity, with continuous improvements in resolution, brightness, color, dynamic range, and response speed. However, compared to the real world, they still lack dimensionality, making it impossible to present information that is not visible on the display screen. Therefore, projecting traditional two-dimensional information into the air is a prerequisite for presenting more information in three dimensions in the future.

[0003] Existing floating displays primarily utilize Pepper's Ghost technology and off-axis concave mirror imaging. Pepper's Ghost utilizes four translucent, semi-reflective surfaces at right angles to each other, forming a pyramid shape. A flat-panel display serves as the information source, ultimately forming an image within the pyramid. Due to the use of a translucent, semi-reflective film, the user can simultaneously observe the external world behind the image, creating the illusion of the image "floating" in mid-air. However, this approach suffers from the disadvantage that the image formed in mid-air is not directly to the user's side, thus deviating from the desired "floating" experience. Off-axis concave mirror imaging utilizes the principle that a concave mirror can create a magnified, inverted real image of a beacon. The original beacon is placed between 1 and 2 focal lengths from the concave mirror, and the mirror is tilted at a certain angle, offsetting the resulting magnified real image from the optical axis. This creates a floating real image, but the original image is not directly visible due to the off-axis nature. However, the image source size is negatively correlated with the floating height and image quality, making it impossible to use a standard-sized LCD, limiting its practicality.

[0004] Therefore, how to solve the problem that the existing floating display method has limitations in display size, floating distance, and viewing angle is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a suspension display device and electronic equipment, which can achieve suspension display with a wide viewing angle, low cost and high display effect. The specific scheme is as follows:

[0006] A suspended display device comprises: a flat panel display, a polarization splitting plate located on a light-emitting surface of the flat panel display and spaced apart from the flat panel display, and a retroreflective plate surrounding the flat panel display and the polarization splitting plate to form a side of the suspended display device; wherein:

[0007] A polarizing coating is provided on the light emitting surface of the flat panel display;

[0008] A quarter wave plate is provided on one side of the retro-reflective plate close to the interior of the suspension display device;

[0009] The polarization beam splitter plate is used to reflect the linearly polarized light emitted by the flat panel display to the retro-reflective plate, and is also used to project the linearly polarized light reflected by the retro-reflective plate to form a suspended image.

[0010] Preferably, in the above-mentioned suspension display device provided by the embodiment of the present invention, the polarizing coating is a film layer with S-direction linear polarization;

[0011] The flat panel display is used to emit S-direction linearly polarized light;

[0012] The polarization beam splitter plate is used to reflect the S-direction linearly polarized light to the retro-reflective film layer;

[0013] The retro-reflective film layer is used to reflect the elliptically polarized light back to the quarter-wave plate after the quarter-wave plate adjusts the S-direction linearly polarized light into elliptically polarized light, so as to adjust the elliptically polarized light into P-direction linearly polarized light and incident on the polarization beam splitter plate;

[0014] The polarization beam splitter plate is also used to transmit the P-direction linearly polarized light.

[0015] Preferably, in the above-mentioned floating display device provided by the embodiment of the present invention, the flat panel display and the polarization beam splitting plate are parallel to each other, and the size of the flat panel display is smaller than that of the polarization beam splitting plate.

[0016] Preferably, in the above-mentioned floating display device provided by the embodiment of the present invention, when the surfaces of the flat panel display and the polarization beam splitting plate are both quadrilaterals, there are four retro-reflective plates.

[0017] Preferably, in the above-mentioned suspension display device provided by the embodiment of the present invention, the smaller the size of the flat panel display and the larger the size of the polarization beam splitting flat panel, the larger the angle range of human eye observation.

[0018] Preferably, in the above-mentioned suspended display device provided by the embodiment of the present invention, the retro-reflective flat panel is placed at a 45-degree angle to the flat panel display.

[0019] Preferably, in the above-mentioned floating display device provided by the embodiment of the present invention, the flat panel display is a two-dimensional flat panel display or a three-dimensional display.

[0020] Preferably, in the above-mentioned suspension display device provided by an embodiment of the present invention, when the flat panel display is a two-dimensional flat panel display, the suspension display device further comprises: a high-frequency vibrator located on a side of the flat panel display away from the polarization splitting plate.

[0021] Preferably, in the above-mentioned suspension display device provided by the embodiment of the present invention, the flat panel display is an LCD backlight display, an OLED display, an LED three-dimensional matrix display or a MicroLED three-dimensional matrix display.

[0022] An embodiment of the present invention further provides an electronic device, comprising the above-mentioned floating display device provided by an embodiment of the present invention.

[0023] As can be seen from the above technical solution, the present invention provides a suspended display device comprising: a flat panel display, a polarization splitter plate located on one side of a light-emitting surface of the flat panel display and spaced apart from the flat panel display by a predetermined distance, and a retro-reflective plate surrounding the flat panel display and the polarization splitter plate to form a side of the suspended display device; wherein the light-emitting surface of the flat panel display is provided with a polarizing coating; a quarter-wave plate is provided on the side of the retro-reflective plate proximal to the interior of the suspended display device; and the polarization splitter plate is configured to reflect linearly polarized light emitted by the flat panel display toward the retro-reflective plate and to project the linearly polarized light reflected by the retro-reflective plate to form a suspended image.

[0024] The above-mentioned floating display device provided by the present invention adopts a combination of a retro-reflective film layer with a quarter-wave plate and a polarization splitter plate to polarize and modulate the light beam emitted from a flat-panel display with a polarizing coating, thereby realizing a floating display with a wide viewing angle. The retro-reflective film layer is used to reflect the light beam back along its original path, thereby ensuring the direction of the light beam and the position of the floating display. In addition, a number of polarization devices are used to control the light path, thereby preventing the content displayed on the flat-panel display from being directly observed by the human eye. The entire floating display device is low in cost, high in technological sense, and has a high floating display effect, thereby improving the user experience.

[0025] In addition, the present invention also provides a corresponding electronic device for the suspension display device, which further makes the suspension display device more practical, and the electronic device has corresponding advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of a suspension display device provided by an embodiment of the present invention;

[0028] Figure 2 This is an imaging optical path diagram of the suspension display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The present invention provides a suspension display device, such as Figure 1 As shown, it includes: a flat panel display 1, a polarization splitting plate 2 located on the light-emitting side of the flat panel display 1 and having a set distance from the flat panel display 1, and a retro-reflective plate 3 surrounding the flat panel display 1 and the polarization splitting plate 2 to form a side of the suspended display device; wherein,

[0031] A polarizing coating is provided on the light emitting surface of the flat panel display 1;

[0032] A quarter-wave plate is provided on the side of the retro-reflective flat plate 3 near the interior of the suspended display device. It should be noted that the retro-reflective film layer 3 (with the quarter-wave plate) here is different from ordinary mirror reflection. It has the characteristic of reflecting the light beam back along its original path, ensuring the propagation direction of the light beam in the device and then realizing the function of converging the light beam in the air. The quarter-wave plate has the function of modulating polarization characteristics.

[0033] The polarization beam splitter plate 2 is used to reflect the linearly polarized light emitted by the flat panel display 1 to the retro-reflective plate 3 , and is also used to project the linearly polarized light reflected by the retro-reflective plate 3 to form a suspended image X.

[0034] In the above-mentioned floating display device provided by the embodiment of the present invention, a combination of a retro-reflective film layer with a quarter-wave plate and a polarization splitter plate is used to polarize-modulate the light beam emitted from the flat-panel display with a polarizing coating, thereby realizing a floating display with a wide viewing angle. The retro-reflective film layer is used to reflect the light beam back along its original path, thereby ensuring the direction of the light beam and the position of the floating display. In addition, a number of polarization devices (such as the polarizing coating, the quarter-wave plate, and the polarization splitter plate) are used to realize the control of the light path, thereby preventing the content displayed on the flat-panel display from being directly observed by the human eye. The entire floating display device is low in cost, high in technological sense, and has a high floating display effect, thereby improving the user experience.

[0035] As can be understood, the floating display device of the present invention places a flat-panel display under a polarizing beam splitter plate. The flat-panel display is coated with a polarizing coating, and a retro-reflective plate with a quarter-wave plate is placed on its side. The resulting image floats above the polarizing beam splitter plate at a certain distance. In other words, the two-dimensional or three-dimensional content on the flat-panel display is projected into space, forming a floating image on the side away from the flat-panel display. This floating image is visible from different angles, creating a high-tech feel that is visible but not tangible.

[0036] In practical applications, the suspended image is the image seen by the human eye in the air. Depending on the content of the flat panel display, it can be a static image, a dynamic image, or three-dimensional content that changes with the viewing angle.

[0037] In a specific implementation, in the above-mentioned suspended display device provided by the embodiment of the present invention, the polarizing coating layer may be a film layer with S-direction linear polarization.

[0038] Furthermore, when the polarizing coating is a film layer with S-direction linear polarization, as Figure 1 As shown, the flat panel display 1 is used to emit S-direction linearly polarized light;

[0039] Polarization beam splitter plate 2, used to reflect the linearly polarized light in the S direction to the retro-reflective film layer;

[0040] The retro-reflective film layer 3 is used to reflect the elliptically polarized light back to the quarter-wave plate after the quarter-wave plate adjusts the S-direction linear polarized light into elliptically polarized light, so as to adjust the elliptically polarized light into P-direction linear polarized light and enter the polarization splitting plate 2;

[0041] The polarization beam splitter plate 2 is also used to transmit the linearly polarized light in the P direction. The polarization beam splitter plate 2 can prevent the light beam of the flat panel display 1 from being emitted directly without passing through the retro-reflective surface.

[0042] Specifically, when the flat-panel display 1 is turned on, the emitted light beam is linearly polarized in the S direction. After passing through the polarization beam splitter plate 2, due to the polarization beam splitter plate 2's characteristic of reflecting S light, the light beam is reflected back to the retro-reflective film layer 3 (with a quarter-wave plate). Because the retro-reflective film layer 3 has the characteristic of reflecting the light beam back along its original path, and the quarter-wave plate has the function of modulating polarization properties, the reflected light beam undergoes two adjustments by the quarter-wave plate and becomes linearly polarized in the P direction, which is then transmitted out of the polarization beam splitter plate. At this point, the light beam forms a suspended image X above the polarization beam splitter plate 2, with the same content as the flat-panel display. Regardless of the observer's position, the observer can see this suspended image in all directions, consistent with the presentation of real-world objects. However, due to the light beam modulation characteristics, the flat-panel display below cannot be seen.

[0043] In specific implementation, in the above-mentioned suspension display device provided by the embodiment of the present invention, as Figure 1 As shown, the flat panel display 1 and the polarization beam splitting plate 2 can be parallel to each other, and the size of the flat panel display 1 is smaller than that of the polarization beam splitting plate 2 .

[0044] In a specific implementation, in the above-mentioned floating display device provided by an embodiment of the present invention, when the surfaces of the flat panel display 1 and the polarization beam splitting plate 2 are both quadrilaterals, four retro-reflective plates 3 are provided. If the surfaces of the flat panel display 1 and the polarization beam splitting plate 2 are both regular polygons, four identical retro-reflective plates 3 can be provided, and the quarter-wave plates provided on the surfaces can also be identical. This optical system has a simple structure and is easy to maintain.

[0045] Figure 2 The actual imaging optical path of the suspended display device provided by an embodiment of the present invention is shown, where W is the side length of the flat panel display (with an S-direction linear polarization film layer), V is the side length of the polarization splitter plate, and H is the distance from the flat panel display to the polarization splitter plate, which is also the distance from the polarization splitter plate to the suspended image. θ is the minimum critical angle of light from the edge of the flat panel display after being reflected by the polarization splitter plate and reaching the retro-reflective film layer (with a quarter-wave plate). In other words, part of the light whose light beam angle from the flat panel display is less than θ cannot be emitted through this device to form an image. α is the maximum critical angle of light from the edge of the flat panel display after being reflected by the polarization splitter plate and reaching the retro-reflective film layer (with a quarter-wave plate). In other words, part of the light whose light beam angle from the flat panel display is greater than α cannot be emitted through this device to form an image. Therefore, the light beam angle that can be observed by the human eye is: greater than 2θ and less than 2α.

[0046] In a specific implementation, the smaller the size of the flat-panel display and the larger the size of the polarization splitter flat panel, the larger the range of angles observed by the human eye. In other words, as long as the W of the flat-panel display is smaller and the V of the polarization splitter flat panel is larger, the human eye's observation angle can reach 0 to 180 degrees (excluding the boundary value). Therefore, it is different from other floating display methods and is called a floating display device with a wide viewing angle.

[0047] In a specific implementation, in the above-mentioned suspended display device provided by the embodiment of the present invention, the retro-reflective flat panel 3 and the flat panel display 1 can be placed at an angle of 45 degrees.

[0048] In specific implementation, in the above-mentioned suspension display device provided by the embodiment of the present invention, the flat panel display 1 can be a two-dimensional flat panel display or a three-dimensional display. In other words, the suspension display device of the present invention can suspend and display two-dimensional information or three-dimensional information.

[0049] In a specific implementation, in the aforementioned floating display device provided in an embodiment of the present invention, when the flat panel display 1 is a two-dimensional flat panel display, the floating display device may further include a high-frequency vibrator located on the side of the flat panel display 1 away from the polarization splitter plate 2. By adding a high-frequency vibrator to the two-dimensional flat panel display, a three-dimensional information floating display can be achieved.

[0050] In specific implementation, in the above-mentioned suspended display device provided in the embodiment of the present invention, the flat panel display can be an LCD backlight display, or a self-luminous display such as an OLED display or MicroLED, and can also be an LED three-dimensional matrix display or a MicroLED three-dimensional matrix display. When the LED three-dimensional matrix display or MicroLED three-dimensional matrix display is placed in the suspended display device of the present invention, it can display suspended three-dimensional information. It should be noted that regardless of the type of display, a polarizing coating needs to be added to the light-emitting surface of the light-emitting surface / body to achieve a polarization modulation effect, so as to prevent the display light beam below the polarization splitting plate from being directly observed by the user, resulting in ghosting or non-suspended content.

[0051] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, including the above-mentioned floating display device provided by an embodiment of the present invention. The electronic device can be an electronic device installed on a vehicle, or any other product or component with a floating display function, which is not limited here. The other essential components of the display device should be understood by those of ordinary skill in the art, and will not be described in detail here, nor should they be used to limit the present invention. The implementation of the electronic device can refer to the implementation of the floating display device, and repeated parts will not be repeated.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. Reference can be made to the description of the same or similar parts between the various embodiments. The electronic device disclosed in the embodiments corresponds to the floating display device disclosed in the embodiments, so the description is relatively simple. For relevant details, refer to the description of the floating display device.

[0053] In summary, embodiments of the present invention provide a suspended display device and electronic device, comprising: a flat panel display; a polarization beam splitter plate located on one side of a light-emitting surface of the flat panel display and spaced apart from the flat panel display; and a retroreflective plate surrounding the flat panel display and the polarization beam splitter plate to form a side of the suspended display device. The flat panel display has a polarizing coating disposed on its light-emitting surface; the retroreflective plate has a quarter-wave plate disposed on a side of the retroreflective plate proximal to the interior of the suspended display device; and the polarization beam splitter plate is configured to reflect linearly polarized light emitted by the flat panel display toward the retroreflective plate and to project the linearly polarized light reflected back from the retroreflective plate to form a suspended image. The suspended display device utilizes a combination of a retroreflective film layer with a quarter-wave plate and a polarization beam splitter plate to polarize a light beam emitted from the flat panel display with the polarization coating, thereby achieving a suspended display with a wide viewing angle. The retroreflective film layer utilizes the property of reflecting the light beam back along its original path to ensure the direction of the light beam and the position of the suspended display. Furthermore, a plurality of polarization devices are utilized to control the light path, thereby preventing the content displayed on the flat panel from being directly observed by the human eye. The entire suspended display device is low-cost, highly technological, and provides a high suspended display effect, thereby enhancing the user experience. In addition, the present invention also provides a corresponding electronic device for the suspension display device, which further makes the suspension display device more practical, and the electronic device has corresponding advantages.

[0054] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0055] The above is a detailed introduction to the floating display device and electronic device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A suspension display device, characterized in that: include: A flat panel display, a polarization splitting plate located on a light-emitting surface of the flat panel display and spaced apart from the flat panel display, and a retroreflective plate surrounding the flat panel display and the polarization splitting plate to form a side of the suspended display device; wherein, The flat panel display is provided with a polarizing coating on its light-emitting surface; the polarizing coating is a film layer with an S-direction linear polarization; the flat panel display is configured to emit S-direction linearly polarized light; the flat panel display and the polarization beam splitting plate are parallel to each other, and the flat panel display is smaller than the polarization beam splitting plate; A quarter-wave plate is provided on a side of the retro-reflective plate close to the interior of the suspension display device; the retro-reflective plate is used to reflect the elliptically polarized light back to the quarter-wave plate after the quarter-wave plate adjusts the S-direction linearly polarized light into elliptically polarized light, so as to adjust the elliptically polarized light into P-direction linearly polarized light and enter the polarization splitting plate; The polarization beam splitter plate is used to reflect the S-direction linearly polarized light to the retro-reflective plate, and is also used to transmit the P-direction linearly polarized light reflected back by the retro-reflective plate to form a suspended image, so that the human eye can see the suspended image at different observation angles.

2. The suspension display device according to claim 1, wherein: When the surfaces of the flat panel display and the polarization beam splitting plate are both quadrilaterals, the number of the retro-reflective plates is four.

3. The suspension display device according to claim 1, wherein: The smaller the size of the flat panel display and the larger the size of the polarization beam splitting flat panel, the larger the range of viewing angles of the human eye.

4. The suspension display device according to claim 1, wherein: The retro-reflective flat panel is placed at a 45-degree angle to the flat panel display.

5. The suspension display device according to claim 1, characterized in that: The flat panel display is a two-dimensional flat panel display or a three-dimensional display.

6. The suspension display device according to claim 5, characterized in that: When the flat panel display is a two-dimensional flat panel display, the suspension display device further comprises: a high-frequency vibrator located on a side of the flat panel display away from the polarization splitting plate.

7. The suspension display device according to claim 1, characterized in that: The flat panel display is an LCD backlight display, an OLED display, an LED three-dimensional matrix display or a MicroLED three-dimensional matrix display.

8. An electronic device, characterized in that: It comprises the suspension display device according to any one of claims 1 to 7.

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