Multidirectional floating projection system capable of tactile interaction

Abstract

The invention discloses a multi-directional floating projection system capable of tactile interaction, and the system comprises a display which is used for displaying the projected content; the optical negative refraction plate is located above the display, the included angle between the optical negative refraction plate and the display is an obtuse angle, the optical negative refraction plate enables the projected content to form a floating real image above the optical negative refraction plate, and the real image and the projected content form plane symmetry relative to the optical negative refraction plate; the rotating device drives the display to rotate around a virtual axis perpendicular to the optical negative refraction plate; the at least one first infrared detection device is used for identifying the contact position of a user and the real image; the at least one ultrasonic transmitting device is used for transmitting an ultrasonic beam to the contact position when the user is in contact with the real image so as to provide tactile feedback for the user; and the control device is in communication connection with the display, the rotating device, the first infrared detection device and the ultrasonic transmitting device.

Description

[Technical field]

[0001] The invention relates to a floating projection system. [Background technology]

[0002] Floating projection is a trendy conceptual technology that uses an optical lens that appears to have a negative refractive index to produce the image of the projected object directly in the air, without the need for an imaging background such as a projection screen. At present, some developers have added tactile interaction functions to floating projection to cater to the current popular touch screen interaction habits. However, the current floating projection can often only be projected in a single direction, and cannot give full play to the characteristics of not requiring an imaging background. The application scenarios of this technology need to be further explored. Moreover, in the existing floating projection technology, the angle between the projected object and the optical lens is often less than 90 degrees. Such a setting results in more secondary projections, resulting in blurred imaging. [Summary of the invention]

[0003] In view of the background technology, the present invention provides a multi-directional floating projection system capable of tactile interaction.

[0004] To achieve the above purpose, the present invention adopts the following technical means:

[0005] A multi-directional floating projection system with tactile interaction includes: a display for displaying projected content; an optical negative refraction plate located above the display and having an obtuse angle with the display, wherein the optical negative refraction plate causes the projected content to form a floating real image above the optical negative refraction plate, wherein the real image and the projected content form a plane symmetry with respect to the optical negative refraction plate; a rotating device for driving the display to rotate around a virtual axis perpendicular to the optical negative refraction plate; at least one first infrared detection device for identifying a contact position between a user and the real image; at least one ultrasonic emission device for emitting an ultrasonic beam to the contact position when the user contacts the real image, thereby providing tactile feedback to the user; and a control device for communicating with the display, the rotating device, the first infrared detection device, and the ultrasonic emission device.

[0006] Furthermore, the optical negative refraction plate, the first infrared detection device and the ultrasonic emission device rotate following the real image.

[0007] Furthermore, the first infrared detection device and the ultrasonic emission device are always located in front of the display.

[0008] Furthermore, it also includes at least one second infrared detection device for detecting the relative position between the user and the real image. The second infrared detection device is communicatively connected to the control device. The control device can instruct the rotating device to rotate according to the detection data of the second infrared detection device so that the real image faces the user.

[0009] Furthermore, it also includes a plurality of fixed position correction buttons, which are communicatively connected to the control device. After the user actively presses one of the position correction buttons, the control device instructs the rotating device to rotate so that the real image faces the pressed position correction button.

[0010] Furthermore, the control device is connected to the display, the rotating device, the first infrared detection device, and the ultrasonic emission device through wireless communication.

[0011] The multi-directional floating projection system capable of tactile interaction of the present invention has the following technical effects:

[0012] The control device instructs the rotating device to rotate with the movement of the user, driving the display and the real image to rotate with the movement of the user, so that the real image can face the user after the user stops moving, allowing the user to observe the real image in multiple directions and to achieve tactile interaction using the first infrared detection device and the ultrasonic emission device. In addition, in the present invention, the angle A between the screen and the optical negative refraction plate is set to an obtuse angle, which can reduce secondary projection.

Brief Description of the Drawings

[0013] Figure 1 It is a three-dimensional schematic diagram of a first embodiment of a multi-directional floating projection system capable of tactile interaction according to the present invention;

[0014] Figure 2 A schematic diagram of a user observing and contacting a projected real image in one orientation;

[0015] Figure 3 A schematic diagram of the system rotating 180° following the user;

[0016] Figure 4 FIG. 4 is a schematic diagram of a second embodiment of a multi-directional floating projection system capable of tactile interaction according to the present invention.

[0017] Description of Figure Numbers:

[0018] Optical negative refraction plate 1 display 2 rotating device 3

[0019]

[0020] Control device 6 Second infrared detection device 7 Position correction button 8

[0021] [Specific implementation method]

[0022] In order to facilitate a better understanding of the purpose, structure, characteristics and effects of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0023] refer to Figures 1 to 3 The first embodiment of the tactilely interactive multi-directional floating projection system of the present invention includes an optical negative refraction plate 1, a display 2, a rotating device 3, a first infrared detection device 4, an ultrasonic emitting device 5 and a control device 6.

[0024] refer to Figure 1 to Figure 2 The optical negative refraction plate 1 is located at the top of the system. The optical negative refraction plate 1 is an optical lens that externally exhibits a negative refractive index, such as the related products of ASKA3D company. The optical negative refraction plate 1 can project the image on the display 2 below into the air above the optical negative refraction plate 1.

[0025] refer to Figure 1 to Figure 2 The display 2 is located below the optical negative refraction plate 1. The display 2 can be a general display 2 available on the market. Its screen 21 is used to display the projected content. The light of the projected content passes through the optical negative refraction plate 1 to form a floating real image R above the optical negative refraction plate 1. The real image R and the display 2 are plane-symmetrical about the optical negative refraction plate 1. The light propagation direction of the imaging process is as follows: Figure 2 , Figure 3 As shown by the middle arrow, the light does not pass through the reflector before entering the optical negative refraction plate 1. The optical negative refraction plate 1 only processes the light directly incident from the display 2. The user can see the real image R suspended above the system on the back of the display 2. In the present invention, the angle A between the screen 21 and the optical negative refraction plate 1 is set to an obtuse angle, which can reduce secondary projection.

[0026] refer to Figure 1 to Figure 2 The rotating device 3 includes a motor (not shown) and a rotating shaft 31 connected to the motor, the rotating shaft 31 is perpendicular to the optical negative refraction plate 1, the display 2 is connected to the rotating shaft 31 and can rotate along with the rotating shaft 31, the rotating device 3 drives the display 2 to rotate around a virtual axis perpendicular to the optical negative refraction plate 1, the virtual axis coincides with the rotating shaft 31, and the real image R rotates along with the display 2 accordingly. In this embodiment, the rotating shaft 31 coincides with the center of the optical negative refraction plate 1 from top to bottom.

[0027] Since the optical negative refraction plate 1 has anisotropy, in this embodiment, the optical negative refraction plate 1 rotates synchronously with the display 2 to ensure that the real image R rotates correspondingly with the display 2 .

[0028] refer to Figure 1 to Figure 2 In this embodiment, the real image R, the rotation axis 31 and the display 2 are substantially aligned vertically, and the real image R is substantially located above the center of the optical negative refraction plate 1. In other embodiments, the real image R and the display 2 may be arranged to be horizontally offset from the rotation axis 31, that is, the vertical projections of the real image R and the display 2 on the optical negative refraction plate 1 are offset from the center of the optical negative refraction plate 1.

[0029] refer to Figure 1 to Figure 2 The first infrared detection device 4 is located at the top of the system and is used to identify the contact position between the user (generally using a finger) and the real image R. Figures 2 to 3 In this embodiment, the first infrared detection device 4 rotates with the display 2 and is always located in front of the display 2 (the direction in which the display 2 displays the projected content is regarded as the front of the display 2), that is, the first infrared detection device 4 rotates with the real image R and keeps aligned with the contact position between the user and the real image R to accurately identify. In other embodiments, multiple first infrared detection devices 4 may be provided and distributed at different positions to increase the accuracy of identification.

[0030] refer to Figure 1 to Figure 2 The ultrasonic emitting device 5 is located at the top of the system. When the user touches the real image R, an ultrasonic beam is emitted to the contact position to provide tactile feedback to the user (generally the user's finger). Figures 2 to 3 In this embodiment, the first infrared detection device 4 rotates with the display 2 and is always located in front of the display 2, that is, the ultrasonic emission device 5 rotates with the real image R and keeps aligned with the contact position between the user and the real image R to accurately provide tactile feedback. In other embodiments, multiple ultrasonic emission devices 5 can be provided and distributed at different positions to enrich the user's tactile feedback experience.

[0031] refer to Figures 1 to 3 This embodiment also has a second infrared detection device 7 located on the top of the system, which is used to detect the relative position between the user (such as the user's eyeball) and the real image R, so that the real image R remains facing the user.

[0032] refer to Figure 1 to Figure 2, the control device 6 is connected in communication with the display 2, the rotating device 3, the first infrared detection device 4, the ultrasonic emitting device 5 and the second infrared detection device 7. The control device 6 instructs the rotating device 3 to rotate according to the detection data received by the second infrared detection device 7 so that the real image R faces the user, and also instructs the ultrasonic emitting device 5 to emit an ultrasonic beam to the contact position according to the detection data received by the first infrared detection device 4. In addition, the control device 6 also determines which elements of the projected content the user wants to interact with according to the detection data received by the first infrared detection device 4, and runs the corresponding interaction program to control the display 2 to display the corresponding interaction screen. For example, a button for playing a video is displayed in the real image R. When the user touches the button, the preset video playing program will be triggered accordingly. The control device 6 instructs the display 2 to display the preset played video, and the real image R follows the display 2 to display the aforementioned preset played video in real time.

[0033] refer to Figure 4 , which is the second embodiment of the present invention, also includes the optical negative refraction plate 1, the display 2, the rotating device 3, the second infrared detection device, the ultrasonic emitting device 5 and the control device 6. The difference between the second embodiment and the first embodiment is that it includes a plurality of fixed position correction buttons 8, but does not include the second infrared detection device 7. The position correction buttons 8 are located at the periphery of the optical negative refraction plate 1 and are in communication connection with the control device 6. When the user is located at the periphery of one of the position correction buttons 8 and actively presses one of the position correction buttons 8, the control device 6 instructs the rotating device 3 to rotate so that the real image R faces the pressed position correction button 8, that is, the real image R faces the position of the user.

[0034] In the above embodiment, the control device 6 is connected to the display 2, the rotating device 3, the first infrared detection device 4, the ultrasonic emitting device 5, the second infrared detection device 7 and the position correction button 8 via wireless communication (such as Wi-Fi). In other embodiments, a wired connection can be used.

[0035] In summary, the multi-directional floating projection system with tactile interaction of the present invention has the following beneficial effects:

[0036] The control device 6 instructs the rotating device 3 to rotate with the movement of the user, driving the display 2 and the real image R to rotate with the movement of the user, so that the real image R can face the user after the user stops moving, allowing the user to observe the real image R in multiple directions and realize tactile interaction using the first infrared detection device 4 and the ultrasonic emission device 5. In addition, in the present invention, the angle A between the screen 21 and the optical negative refraction plate 1 is set to an obtuse angle, which can reduce secondary projection.

[0037] The above detailed description is only an explanation of the preferred embodiments of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and illustrations of the present invention are included in the patent scope of the present invention.

Claims

1. A multi-directional floating projection system capable of tactile interaction, characterized in that: include: A display, used to display the projected content; an optical negative refraction plate, located above the display, and having an obtuse angle with the display, wherein the optical negative refraction plate enables the projected content to form a floating real image above the optical negative refraction plate, and the real image and the projected content are plane-symmetrical about the optical negative refraction plate; A rotating device drives the display to rotate around a virtual axis perpendicular to the optical negative refraction plate; at least one first infrared detection device, for identifying a contact position between the user and the real image; at least one ultrasonic emitting device, which emits an ultrasonic beam toward the contact position when the user touches the real image, so as to provide tactile feedback to the user; A control device is connected to the display, the rotating device, the first infrared detection device, and the ultrasonic emission device for communication.

2. The multi-directional floating projection system capable of tactile interaction as claimed in claim 1, characterized in that: The optical negative refraction plate, the first infrared detection device and the ultrasonic emission device rotate following the real image.

3. The multi-directional floating projection system capable of tactile interaction as claimed in claim 2, characterized in that: The first infrared detection device and the ultrasonic emission device are always located in front of the display.

4. The multi-directional floating projection system capable of tactile interaction as claimed in claim 1, characterized in that: It also includes at least one second infrared detection device for detecting the relative position between the user and the real image. The second infrared detection device is communicatively connected to the control device. The control device can instruct the rotating device to rotate according to the detection data of the second infrared detection device so that the real image faces the user.

5. The multi-directional floating projection system capable of tactile interaction as claimed in claim 1, characterized in that: It also includes a plurality of fixed position correction buttons which are in communication with the control device. After a user actively presses one of the position correction buttons, the control device instructs the rotating device to rotate so that the real image faces the pressed position correction button.

6. The multi-directional floating projection system capable of tactile interaction as claimed in claim 1, characterized in that: The control device is connected to the display, the rotating device, the first infrared detection device, and the ultrasonic emission device through wireless communication.

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