TWI654446B - Floating imaging display device - Google Patents

Abstract

A floating imaging display device includes a display light source that can actively or passively project an optical image of different depth information such as a plane or a stereo; and at least one array of triangular mirror structures, which are provided on a transparent substrate a triangular groove arranged in an array, the triangular groove may penetrate the transparent substrate or be trapped in the transparent substrate, and a reflective material is plated on each side wall of the triangular groove, and the array type triangular mirror structure can be adopted The optical image of the display light source is projected in the physical physical space in front, and the stereoscopic floating projection image can be imaged without using the scattering medium; through the above composition, the virtual stereoscopic floating projection image with depth information can be displayed in the air. The position can be adjusted by the array of triangular mirror structures to be in a mirror-symmetrical or asymmetrical spatial region for hiding the display light source or advanced dynamic display. The device can further combine the attitude sensing system and the ultrasonic mechanical feedback to establish a set of instant interactive floating projection system to achieve the real-time interactive function in the physical space, so that it can be widely used in life.

Description

Floating imaging display device

The present invention relates to a floating imaging display device, and more particularly to a naked eye floating projection display technology, in particular to a stereoscopic floating image that can be projected in a physical physical space without wearing any device. Teaching, advertising and interactive audio and video.

The development of science and technology is changing with each passing day. Nowadays, more and more attention is paid to the visual experience. The display technology is constantly innovating, from the previous cathode ray tube (CRT) TV two-dimensional (2D) display to the present virtual reality (Virtual Reality, VR), Augmented reality (AR) and other three-dimensional (3D) display technology, 3D display technology since the launch of the movie Avatar in 2009 began to flourish, including stereoscopic display technology For the naked eye and glasses type, the naked eye type does not need to wear any device to set the optical structure on the display, while the glasses type needs to be equipped with a polarizing lens or a filter, but the principle is to use parallax. The way is to let the two eyes see different perspectives to synthesize a 3D stereo image. Among these many 3D stereoscopic display technologies, the floating projection technology in the naked eye display technology has recently attracted the attention of the public. It is characterized in that the viewer does not need to wear any device and can project images in free space to make virtual images. Combined with physical construction, it is often used in large performing arts or installation art. In the future, it can be combined with related feedback technologies such as ultrasonic feedback technology to make floating images no longer just watch and can be manipulated and interacted with their images. The traditional floating projection technology is divided into a scattering type and a semi-reflective type. The scattering type mainly uses a gauze net and a water curtain to project an image on the medium, and the scattering of the light allows the observer to watch without observing the scattering medium. To the image, but the image is not stereoscopic. A common technique for semi-reflection is to use a half-transparent mirror (also known as a beam splitter (BS)) 41. After reflection by the beam splitter, the observer 42 can see the virtual image 43 while viewing the entity. The space is shown in Figure 6. In recent years, reflective floating projection technology is divided into two-layer vertical reflection type and retro-reflection type. The main difference of the above technology is that the water curtain and the gauze medium in the scattering floating projection technology are easily subject to external interference to make the image distorted (such as air disturbance), the image quality is very poor, the space cost is large, but it is easy to make a large image; The main advantage of reflective floating projection is that the image quality is higher and the image quality is less affected by external factors, but the virtual image cannot be placed in the physical physical space, and it is limited by the image size limitation. Large-scale stereoscopic images require large-scale semi-transparent mirrors, which require a relatively large space cost; retroreflective floating projection imaging is of poor quality and requires considerable space cost; and double-layer vertical reflection floats The air projection is limited by the right-angle structure, and the virtual image position cannot be adjusted, and the image is not stereoscopic. Since the reflective type is easier to manufacture as a portable device and is not affected by external factors and presents high-quality images, the discussion on the reflective related technology is extended. In recent years, there are many related patented technologies for reflective floating projection. For example, the extended reality imaging method and its device proposed by the Republic of China Patent No. I572899 use the principle of visual residual to project different depth images, through mirrors, focusing lenses and another. Post-mirror imaging; however, the emphasis on image processing technology based on Depth Image Based Rendering (DIBR) is not a technical concept of floating projection. The adjustable size stereo imaging device of the Republic of China Patent No. I481905 projects a two-dimensional view of the four directions of the image of the object to be imaged, namely, the front view, the rear view, the left view and the right view, respectively, to a regular four-corner vertebra. The four sides of the body, the four-corner system is made of a special light-transmitting material, which can reflect the projected light projected onto the four sides by the refraction and reflection of light; however, this is the most traditional split-type floating Projection, the virtual image falls in the physical space behind the screen, which is different from the front of the screen projected by the present invention. The three-dimensional floating image display device of the Republic of China Patent No. I608255 utilizes two suspended image plates having a dihedral corner reflector array to respectively project a concentrated real image corresponding to different viewing angles of the left and right eyes and different polarization states. It is necessary to match the polarized glasses to screen the polarized concentrated beam, which can make the observer perceive the effect of the stereoscopic floating image; however, this is the concept of traditional 3D TV display, which requires the use of polarized glasses, and can not achieve floating in the naked eye. projection. A transparent autostereoscopic display of the Republic of China Patent No. I615634, the display having (at least) at least one 3D autostereoscopic display mode (wherein the display is driven and the optical configuration is for generating a view), and a transparent display mode (wherein the display) And the optical configuration is driven to a transparent mode to provide an undistorted view of the image behind the display; however, the concept of the naked-view 3D television display, the stereoscopic image falls within the virtual space within the screen. The optical imaging device of US Pat. No. 8,702,252 and the optical imaging method using the same are a patented technology proposed by Asukanet, which is mainly engaged in image processing in Japan, for floating projection in 2014, and is a disk using a mirror array of interlaced arrays. The optical element is structured by a plurality of two-dimensional mirrors staggered at different horizontal planes, so that the image is reflected by the mirror array and then reflected to the symmetrical position to form a real image floating image; this technique achieves a floating projection with a double-reflex structure. The effect is that the structure is a double-layered right-angled staggered pattern, and the image position cannot be adjusted. Although the structure is simple, only one optical component can be achieved, but the processing is difficult to produce, and it is possible to generate multiple images to be added with polarizers, but this will Reduce the brightness of its image. US Patent No. US20120140325 uses a double-sided angular mirror array optical element display device. The system includes a substrate, and a plurality of reflective surfaces are formed on the substrate. The reflective surfaces are perpendicular to each other, and the reflective mirror protrudes from the substrate. The mirror array is reflected back to the symmetrical position to form a real image floating image; however, the patent is the reverse structure of the above-mentioned US Pat. No. 8,702,252, that is, a convex (or hole) structure, the structure is a single layer right angle type, and the image position cannot be adjusted. . And a retroreflective sheeting of retroreflective sheeting of US4082426, the retroreflecting sheet is composed of a plurality of transparent spheres and a reflective backing plate, and the light passes through the same light path as the reflecting backing plate. The corresponding position is imaged; however, the retro-reflective structure of the spherical shape has an imaging principle that is different from the present invention. Another technique is the document by CB Burckhardt et al., 1968 (CB Burckhardt, RJ Collier, ET Doherty, "Formation and Inversion of Pseudoscopic Images," Appl. Opt. 7, 627-631 (1968)), A retro reflection architecture is used to correct the problem of Pseudoscopic in an Integral image system. The film structure is such that the lens array is arranged and a reflective layer is placed at the focal position behind the lens. The outgoing light can exit the optical path of the incident light to achieve a reverse effect and correct the problem of reverse stereo in the integrated image. In 2013, the Hirotsugu Yamamoto team at Tokushima University in Japan proposed a floating projection architecture. As shown in Figure 7, the half-reflecting mirror 51, the soft optical component-retroreflective sheet 52 and the LED panel light source were used. 53 composition. The principle is that the image is reflected by the half mirror 51 and then reflected to the retroreflective sheet 52. After being reflected by the original light path, an image 54 is formed at the symmetrical position, and the object and the image are separated by a beam splitter. However, the size of this technical image is limited by the size of the retroreflective film, and the brightness loss is extremely high due to multiple reflection images. In view of the fact that the previous case requires a complicated and heavy system, the performance in terms of system volume, imaging quality, projection space and image stereoscopicity are not satisfactory. Therefore, the user-like users cannot meet the needs of the user in actual use.

The main object of the present invention is to overcome the above problems encountered in the prior art and to provide a floating projection display technology, which belongs to the naked eye type and can project a stereoscopic floating image in a physical physical space without wearing any device. It has the shortcomings of traditional technology and can be applied to floating imaging display devices in the fields of teaching, advertising and interactive audio and video. The secondary object of the present invention is to provide a new three-dimensional floating projection technology, which does not require complicated and heavy components, and the image quality is directly related to the processing level of the screen material (mechanical precision and optical coating quality), and is not subject to other Factors such as color difference, environmental change, the device can be further combined with attitude sensing system and ultrasonic mechanical feedback to establish a set of real-time interactive floating projection system to achieve real-time interactive function in physical space, making it widely available It is applied to floating imaging display devices in life. For the purpose of the above, the present invention is a floating imaging display device comprising: a display light source capable of actively or passively projecting optical images of different depth information such as plane or stereo; and at least one array of triangular mirrors The structure is provided on a transparent substrate with a plurality of triangular grooves arranged in an array, the triangular grooves can penetrate the transparent substrate or fall into the transparent substrate, and the reflective material is plated on the sidewalls of the triangular grooves. Through the array type triangular mirror structure, the optical image of the display light source can be projected into the physical physical space in front, and the stereoscopic floating image can be imaged without using the scattering medium; through the above composition, the virtual three-dimensional floating with depth information The air-projected image can be displayed in the air, and its position can be adjusted by the array of triangular mirror structures to be in a mirror-symmetrical or asymmetrical spatial region for hiding the display light source or advanced dynamic display. In the above embodiment of the present invention, the angles of the triangular grooves are between 30 and 150 degrees. In the above embodiment of the present invention, the array type triangular mirror structure can be used alone, and the position of the floating projection image is controlled according to the angle of the triangular grooves. In the above embodiment of the present invention, the array type triangular mirror structure can be overlapped in multiple layers, and the position of the floating projection image is controlled according to the mutual angle of the triangular grooves of each layer. In the above embodiment of the present invention, according to the design of the array type triangular mirror structure, the effective viewing angle range of the floating projection can be effectively expanded.

Please refer to FIG. 1 to FIG. 5, which are respectively a schematic diagram of the architecture of the floating imaging display device of the present invention, a schematic diagram of the structure of the array type triangular mirror of the present invention, and a multilayer structure of the array type triangular mirror structure of the present invention. The overlapping schematic, the planar square imaging surface simulation of the present invention, and the stereoscopic imaging surface simulation of the present invention. As shown in the figure, the present invention is a floating imaging display device comprising a display light source 1 and at least one array of triangular mirror structures 2. The display light source 1 mentioned above can actively or passively project an optical image of different depth information such as a plane or a stereo. As shown in FIG. 2, the arrayed triangular mirror structure 2 is provided on a transparent substrate 21 with a plurality of triangular grooves 22 arranged in an array, and the triangular grooves 22 can penetrate the transparent substrate 21 or sink into the In the transparent substrate 21, a reflective material 222 is plated on the sidewall 221 of each of the triangular recesses 22, and the optical image of the display light source 1 is projected through the arrayed triangular mirror structure 2 in a physical physical space in front without scattering. The medium can image a stereoscopic floating image 3 . Wherein, the angles of the triangular grooves 22 may be 30-150°, and the array type triangular mirror structure 2 can be used alone (as shown in FIG. 2), and the floating grooves are controlled according to the angles of the triangular grooves 22. The position of the empty projected image; or by overlapping the layers (as shown in FIG. 3), the position of the floating projection image is controlled by the interactive angle of each layer of the triangular groove 22. Through the above composition, the virtual stereoscopic floating projection image 3 with depth information can be displayed in the air, and its position can be adjusted by the array triangular mirror structure 2 to be located in a mirror symmetrical or asymmetrical space area. To hide the display light source 1 or advanced dynamic display. Thus, a novel floating imaging display device is constructed by the above disclosed structure. The floating imaging display device of the present invention is a display device that transmits the arrayed triangular mirror structure 2 to achieve floating imaging. In the above, the device is mounted on a transparent substrate 21, and a plurality of triangular grooves 22 arranged in an array are formed, and a reflective material 222 is plated on the side walls 221 of the triangular grooves 22. Through the array of triangular mirror structure 2, the image can be projected into the physical physical space in front, and the image can be imaged without using a scattering medium. The floating projection mode of the floating imaging display device of the present invention is different from the lens imaging principle. After the display light source 1 projects image information of different depths, the array of triangular mirror structure 2 can be displayed to display a stereoscopic floating projection image. 3. The position of the floating projection image 3 can be adjusted according to the angle of the triangular groove 22 and the multi-layer overlapping manner. When used, the present invention establishes the architecture in the FRED non-sequential optical simulation design software. As shown in Fig. 1, the display light source 1 (object) is a trapezoidal cube, and the object is rotated by 30 degrees, so the two faces are for the array triangle. The depth information of the mirror structure 2 is different, and is converted into planar information, and the analysis surfaces of different depths on both sides are set on the observation surface. The simulation results show that images of different depths can be respectively imaged on two analysis surfaces, and two The analysis surfaces of different positions are combined to achieve the purpose of stereo imaging, as shown in Figs. 3 and 4, Fig. 3 is a plane square imaging surface simulation diagram, and Fig. 4 is a stereo ladder type imaging surface simulation diagram. The advantages of this device are: 1. The image can be projected in the physical physical space in front, and can be imaged without scattering media. 2. After the display source projects the image information of different depths, the stereoscopic floating projection image can be displayed after passing through the structural screen (ie, the array triangular mirror structure). 3. The position of the projected image of the floating projection can be controlled by the angle of the triangular groove and the overlapping of the layers. 4. The imaging quality is excellent, and its resolution is directly related to the minimum processing scale of the array triangular mirror structure. 5. The effective viewing angle of the floating projection can be effectively expanded according to the structure design of the array triangular mirror. The floating projection display technology of the invention belongs to the naked eye type and does not need to wear any device. It is a new three-dimensional floating projection technology, which can project a stereoscopic floating image in a physical physical space without the disadvantages of the conventional technology. With in-depth information, it can be applied to teaching, advertising and interactive audio and video. The invention does not require complicated and heavy components, and the image quality is directly related to the processing level of the screen material (mechanical precision and optical coating quality), and is not affected by other factors (such as color difference, environmental change), and the device can be further combined. The attitude sensing system and ultrasonic mechanics feedback, establish a set of real-time interactive floating projection system to achieve the real-time interactive function in the physical space, so that it can be widely used in life. In summary, the present invention is a floating imaging display device, which can effectively improve various shortcomings of the conventional use. After the display source projects the image information of different depths, the image can be projected into the physical physical space in front through the array triangular mirror structure. In the present, a stereoscopic floating image with depth information can be imaged without using a scattering medium, and the position of the floating image can be controlled according to the triangular groove angle and the multi-layer overlapping manner, thereby making the invention more progressive and practical. More in line with the needs of the user, it has indeed met the requirements of the invention patent application, and filed a patent application according to law. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the invention are modified. All should remain within the scope of the invention patent.

(part of the invention)

1‧‧‧ display light source

2‧‧‧Arrayed triangular mirror structure

21‧‧‧Transparent substrate

22‧‧‧ triangular groove

221‧‧‧ side wall

222‧‧‧Reflecting material

3‧‧‧Floating projection image

(customized part)

41‧‧‧Half half mirror

42‧‧‧ Observers

43‧‧‧Image

51‧‧‧Half half mirror

52‧‧‧Soft optical components

53‧‧‧Light source

54‧‧‧Image

Fig. 1 is a schematic view showing the structure of a floating imaging display device of the present invention. Fig. 2 is a schematic view showing the structure of the array type triangular mirror of the present invention. Figure 3 is a schematic illustration of the multilayer overlap of the arrayed triangular mirror structure of the present invention. Fig. 4 is a plan view of a planar square imaging surface of the present invention. Fig. 5 is a perspective view of a three-dimensional ladder type imaging surface of the present invention. Figure 6 is a schematic diagram of a conventional semi-reflective floating projection principle. Figure 7 is a schematic diagram of a conventional retroreflective floating projection architecture.

Claims (3)

An floating imaging display device includes: a display light source that can actively or passively project an optical image of different depth information such as a plane or a stereo; and at least one array of triangular mirror structures disposed on a transparent substrate There are a plurality of triangular grooves arranged in an array, the triangular grooves can penetrate the transparent substrate or fall into the transparent substrate, and the reflective material is plated on the sidewalls of the triangular grooves, and the array type triangular mirror structure can be adopted. The optical image of the display light source is projected into the physical physical space in front, and the stereoscopic floating projection image can be imaged without using the scattering medium, wherein the angles of the triangular grooves are between 30 and 150 degrees; The virtual stereoscopic floating projection image with depth information can be displayed in the air, and the position thereof can be adjusted by the array triangle mirror structure to be located in a mirror symmetrical or asymmetrical space area for hiding the display light source or Advanced dynamic display. The floating imaging display device according to claim 1, wherein the array type triangular mirror structure can be used alone, and the position of the floating projection image is controlled according to the angle of the triangular grooves. The floating imaging display device according to claim 1, wherein the array of triangular mirror structures can be stacked in multiple layers, and the position of the floating projection image is controlled according to the interaction angle of the triangular grooves of each layer.