Air imaging device for a vehicle and human-machine interaction vehicle-mounted auxiliary system

Abstract

The application discloses an air imaging device for a car, which is installed in the car and comprises an image source for generating a display picture and an imaging magnifier for enlarging the picture generated by the image source and forming a real image in the air in the car. The application also discloses a man-machine interactive vehicle-mounted auxiliary system, which adopts the air imaging device for the car, and a gesture recognition device is arranged near the real image. The application has the advantages that: as the image becomes larger, the command pattern for displaying the same content also becomes larger, so that the gesture recognition device can easily recognize the gesture of the user and the specific command pattern to be touched, and when the user performs a gesture sliding operation, the gesture sliding distance is also increased, the precision requirement of the gesture recognition device is greatly reduced, and thus the gesture recognition device can more accurately recognize the operation of the user and enhance the experience of the user.

Description

Technical Field

[0001] The invention relates to an air imaging device for automobiles and a human-computer interaction vehicle-mounted auxiliary system. Background Art

[0002] Air imaging mechanisms are widely used in many fields. For example, in cars, some car status can be displayed in front of the driver's line of sight through air imaging devices, such as HUD head-up display devices. However, the image displayed by this device is a virtual image, and the image is usually in front of the car, making the user feel that the image is very far away from the person and unable to perform touch operations.

[0003] With the advancement of technology, people have gradually replaced virtual image-forming air imaging mechanisms with real images using dihedral corner reflectors or long strip reflectors to achieve the purpose of human-computer interaction. However, both dihedral corner reflectors and long strip reflectors use the principle of light reflection, and the real image they form is the same size as the image source display. However, the space utilization rate of current automobile interiors is very high, making it difficult to squeeze out a large space for air imaging devices. As a result, the final image is also very small. The accuracy of gesture recognition devices is also insufficient, resulting in users often encountering recognition errors or failure to recognize user gestures during use. For example, when a user taps a command pattern to be executed, because the command pattern is too small or the user's finger is too thick, it will touch the adjacent command pattern at the same time, making it impossible for the gesture recognition device to determine which command pattern the user has tapped. For another example, when a user makes a swipe gesture to turn a page, due to the small image size and the short swipe distance of the user's finger, the gesture recognition device may not be able to recognize that the user's hand is sliding, which greatly reduces the user experience. Summary of the Invention

[0004] The purpose of the present invention is to provide an air imaging device for automobiles and a human-computer interaction vehicle-mounted auxiliary system, which can effectively solve the problem of low gesture recognition rate in current vehicle-mounted interactive systems.

[0005] In order to solve the above technical problems, the present invention is implemented through the following technical solutions: an air imaging device for a car, installed in a car, comprising:

[0006] An image source for generating a display image;

[0007] and an imaging magnifying glass that magnifies a picture generated by an image source and forms a real image in the air inside the car.

[0008] Preferably, the imaging magnifier is one of a Fresnel lens, a binary diffraction lens, a spherical lens, an aspherical lens, a free-form lens or a flat microlens, which can obtain a single-chip imaging magnifier with higher imaging quality.

[0009] Preferably, the imaging magnifier is a Fresnel lens assembly comprising at least two parallel Fresnel lenses, each comprising a substrate and straight teeth arranged in parallel on the substrate, with the straight teeth of adjacent Fresnel lenses being non-parallel. The use of a Fresnel lens assembly changes the conventional principle of imaging through reflection using a long reflector or a dihedral reflector. Instead, the Fresnel lens assembly utilizes the refraction principle of the Fresnel lens assembly to form a magnified real image in air. This allows for an image significantly larger than the image source even when the image source is relatively small. Compared to conventional air imaging systems, this not only effectively reduces the weight of the entire device but also significantly reduces production costs. Unlike conventional parallel stacked Fresnel lenses with annular teeth, which merely magnify the magnification, the Fresnel lens assembly in this system utilizes a straight tooth structure, with the straight teeth of adjacent Fresnel lenses being non-parallel. Light passing through the first Fresnel lens is corrected by the second Fresnel lens, effectively reducing aberrations and producing a clearer image. This also helps correct distortion and ensures high clarity around the image periphery.

[0010] Preferably, the straight teeth of adjacent Fresnel lenses are perpendicular to each other. The image in the vertical state is the best and can avoid image tilt and rotation.

[0011] Preferably, the top of the straight teeth away from the substrate is provided with a ridge line, and the ridge line is a straight line parallel to the substrate, which is more conducive to the refraction and convergence of light, achieving a better image correction effect and forming a clearer image.

[0012] Preferably, the straight teeth are triangular prisms, and one side surface is in close contact with the substrate. Triangular prism-shaped straight teeth are easy to manufacture, have a better aberration correction effect, and have a higher yield rate.

[0013] Preferably, the cross-section of the straight tooth includes a base and two oblique sides connected end to end in sequence, the base is tightly attached to the substrate, one of the oblique sides is an arc, and the other oblique side is an arc or a straight line. The arc has a better aberration correction effect than the straight line, and the best is that both oblique sides are arcs.

[0014] Preferably, two adjacent Fresnel lenses are arranged opposite to each other; or, two adjacent Fresnel lenses are arranged in the same direction; or, two adjacent Fresnel lenses are arranged in back-to-back directions. Arranging them opposite to each other can achieve the best optical performance, arranging them in back-to-back directions can better fix the relative position between the two Fresnel lenses, and arranging them in the same direction can also achieve better optical effects. Arranging the Fresnel lenses in the same direction is conducive to the superposition of multiple Fresnel lenses.

[0015] Preferably, the two Fresnel lenses are tightly attached to each other; or, a gap is left between the two Fresnel lenses. Pressing them tightly together can minimize the thickness of the Fresnel lens assembly, making the entire device thinner.

[0016] Preferably, the imaging magnifier is an array lens assembly, comprising multiple lenses arranged in a matrix. Compared to using a single Fresnel lens as an imaging unit, an array lens assembly, consisting of multiple lenses arranged in a matrix, can produce a more detailed real image and effectively reduce aberrations, resulting in a clearer image.

[0017] Preferably, the lens is a microlens or a Fresnel lens. Microlenses can allow the array lens group to have more lens units, improving the fineness of the image; Fresnel lenses are inexpensive and easy to manufacture, and can make the entire array lens group lighter and thinner.

[0018] Preferably, the imaging magnifier is a Fresnel reflector, a binary diffraction surface reflector, a spherical reflector, an aspherical reflector, or a free-form surface reflector. Utilizing the principle of reflection magnification, the position between the image source and the imaging magnifier can be arranged more flexibly.

[0019] Preferably, a first reflector is provided on the optical path between the image source and the imaging magnifier. Changing the positional relationship between the image source and the imaging magnifier makes it easier to arrange in a small space in a vehicle.

[0020] Preferably, a second reflector is provided on the optical path between the imaging magnifier and the real image to facilitate adjustment of the position between the real image and the imaging magnifier.

[0021] Preferably, the second reflector is a car windshield. By fully utilizing the windshield for reflection, there is no need to set up additional reflective elements, and the existing equipment in the car is fully utilized to change the imaging position, which is conducive to simplifying the device structure and reducing costs.

[0022] Preferably, the position of the automobile windshield corresponding to the imaging magnifying glass is a wedge-shaped glass, which can reduce the ghosting problem that may be caused by the windshield.

[0023] Preferably, the image source is one or more light sources, and a suitable image source is selected according to the accuracy of the image to be displayed.

[0024] Preferably, when the image source is a plurality of light sources, the light sources are arranged in a matrix, which makes it easier to edit the content to be displayed by different light sources.

[0025] Preferably, the image source is one of LCD, LED, OLED, LCOS or a projector, which reduces the cost and threshold of the image source and has wider adaptability.

[0026] Preferably, the projector is a DLP projector or a laser MEMS module, and a diffusion sheet is provided between the projector and the imaging magnifier. The addition of the diffusion sheet increases the divergence angle of the image source and expands the angle at which the human eye observes the real image.

[0027] Preferably, the light transmittance of the diffusion sheet is 70%±10%. If the light transmittance is too high, the observer can see the bright projection point of the projector. If the light transmittance is too low, the image will be blurred and the brightness will be insufficient.

[0028] Preferably, the size of the imaging magnifier is larger than the size of the real image, so that the user can view the complete image.

[0029] The human-computer interaction vehicle auxiliary system adopts the above-mentioned air imaging device for automobiles, and a gesture recognition device is also provided near the real image.

[0030] Preferably, it also includes a voice recognition device that collects the user's voice and combines it with the real image display content. The voice recognition device recognizes the user's voice instructions and combines them with the real image content to improve the user experience.

[0031] Preferably, the image source is installed in the instrument panel of the vehicle cab, the imaging magnifier is installed in the instrument panel, and the gesture recognition device is installed on the instrument panel near the real image or on the ceiling of the vehicle cab. Such an arrangement is conducive to protecting the image source from accidental damage, and at the same time will not block the position of the imaging magnifier. The gesture recognition device can also recognize the user's instructions without obstruction, which is easy for the user to operate.

[0032] Compared with the existing technology, the advantages of the present invention are: it uses an imaging magnifier as an imaging unit, transforming the image passed through the imaging magnifier into a magnified real image, thereby achieving a larger image from a smaller image source. In other words, it can obtain a larger image without changing the volume of the original air imaging device. This is particularly suitable for use in automobiles, where the available space is small, and the larger image can be produced, and the displayed content can be richer. The larger image allows the user to see more clearly, and when a reminder screen appears in the image, it is easier for the user to notice it. Other passengers in the car can also see the reminder screen and alert the driver.

[0033] In conjunction with the gesture recognition device, since the image becomes larger, the command pattern displaying the same content is also larger, so the gesture recognition device can easily identify which specific command pattern the user's gesture is intended to touch. Moreover, when the user performs a gesture sliding operation, the gesture sliding distance is also correspondingly increased, which greatly reduces the accuracy requirements of the gesture recognition device, thereby enabling the gesture recognition device to more accurately identify the user's operation and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1This is a schematic structural diagram of a first embodiment of an air imaging device for a vehicle according to the present invention;

[0035] Figure 2 This is a diagram illustrating the imaging principle of the first embodiment of the air imaging device for automobiles of the present invention;

[0036] Figure 3 This is a schematic structural diagram of a second embodiment of an air imaging device for a vehicle according to the present invention;

[0037] Figure 4 This is a diagram illustrating the imaging principle of the second embodiment of the air imaging device for automobiles of the present invention;

[0038] Figure 5 This is the first combination of adjacent Fresnel lenses in the first embodiment of the automotive air imaging device of the present invention;

[0039] Figure 6 This is the second combination of adjacent Fresnel lenses in the first embodiment of the automotive air imaging device of the present invention;

[0040] Figure 7 This is the third combination of adjacent Fresnel lenses in the first embodiment of the automotive air imaging device of the present invention;

[0041] Figure 8 This is the first form of the straight teeth of the Fresnel lens in the first embodiment of the automotive air imaging device of the present invention;

[0042] Figure 9 This is the second form of the straight teeth of the Fresnel lens in the first embodiment of the automotive air imaging device of the present invention;

[0043] Figure 10 This is the third form of the straight teeth of the Fresnel lens in the first embodiment of the automotive air imaging device of the present invention;

[0044] Figure 11 This is a schematic structural diagram of a single Fresnel lens in Example 1 of the automotive air imaging device of the present invention;

[0045] Figure 12 This is a diagram illustrating the imaging principle of the third embodiment of the air imaging device for automobiles of the present invention;

[0046] Figure 13 This is a schematic diagram of the structure of an array lens group composed of micro lenses in the third embodiment of the automotive air imaging device of the present invention;

[0047] Figure 14 This is a schematic structural diagram of an array lens group composed of Fresnel lenses in a third embodiment of the automotive air imaging device of the present invention;

[0048] Figure 15This is a schematic diagram of the imaging principle of the fourth embodiment of the automotive air imaging device of the present invention using LCD, LED, OLED or LCOS;

[0049] Figure 16 This is a diagram illustrating the imaging principle of a fourth embodiment of the air imaging device for automobiles of the present invention when a projector is used as a light source;

[0050] Figure 17 This is a schematic diagram of the imaging principle of the fifth embodiment of the air imaging device for automobiles of the present invention using LCD, LED, OLED or LCOS;

[0051] Figure 18 This is a diagram illustrating the imaging principle of the fifth embodiment of the air imaging device for automobiles of the present invention when a projector is used as a light source;

[0052] Figure 19 This is a diagram illustrating the imaging principle of a fifth embodiment of the air imaging device for automobiles according to the present invention;

[0053] Figure 20 This is a diagram showing the imaging principle of the human-computer interaction vehicle-mounted assistance system of the present invention;

[0054] Figure 21 This is a diagram of the imaging principle of a reflective imaging magnifier used in the human-computer interaction vehicle-mounted auxiliary system of the present invention. DETAILED DESCRIPTION

[0055] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0058] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0059] Example 1:

[0060] See Figure 1 、 Figure 2 This is a first embodiment of the air imaging device for automobiles of the present invention, an air imaging device for automobiles, installed in an automobile, comprising: an image source 1 for generating a display image; and an imaging magnifier 3 for magnifying the image generated by the image source 1 and forming a real image 5 in the air inside the automobile.

[0061] Using an imaging magnifier 3 as an imaging unit, the image passing through the imaging magnifier 3 is transformed into a magnified real image 5, thereby enabling a smaller image source 1 to present a larger image. This allows for a larger image to be obtained without changing the volume of the original air imaging device. When used in a vehicle, the limited space can be utilized to obtain the largest possible image, providing a clearer image, more content to be displayed on the image, and more services. Generally speaking, it is best if the size of the Fresnel lens assembly is larger than the size of the formed real image 5, allowing the user to see the entire image.

[0062] Generally speaking, to form a magnified real image 5, the distance between the image source 1 and the imaging magnifier 3 is between one and two times the focal length of the imaging magnifier 3. The imaging lens in this embodiment is a Fresnel lens assembly, comprising at least two parallel Fresnel lenses. Each of the Fresnel lenses comprises a substrate 8 and spur teeth 9 arranged in parallel on the substrate 8. The spur teeth 9 of adjacent Fresnel lenses are not parallel. Two parallel Fresnel lenses mean that the substrates 8 of the two Fresnel lenses are parallel to each other, and the spur teeth 9 on each substrate 8 are also parallel to each other, that is, the length directions of the spur teeth 9 are parallel, as shown in FIG. Figure 11 As shown; the so-called straight teeth 9 refer to the two end faces having exactly the same shape, and each edge line 93 is parallel to each other, such as Figures 8 to 10 shown.

[0063] Light is emitted from an image source 1 and refracted by a Fresnel lens group to form a magnified real image 5 in the air. The use of a Fresnel lens group changes the previous principle of imaging by reflection using a long reflector or a dihedral reflector. The refraction principle of the Fresnel lens group is used to form a magnified real image 5 in the air. As a result, when the image source 1 is relatively small, an image much larger than the image source 1 can be obtained. Compared with traditional air imaging systems, this can not only effectively reduce the weight of the entire device, but also effectively reduce production costs.

[0064] The Fresnel lens group in this system uses straight teeth 9, and the straight teeth 9 of adjacent Fresnel lenses are not parallel. Compared with ordinary annular teeth and parallel stacked Fresnel lenses, it can effectively reduce aberrations and obtain clearer images. At the same time, it is beneficial to correct distortion and ensure high clarity of the image periphery.

[0065] The image source 1 of the above system is a light source 32 which can be one of LCD, LED, OLED or LCOS. These image sources 1 have relatively mature display technology, are relatively easy to obtain, and are relatively easy to control in cost, and are suitable for use when the image source 1 is not too large.

[0066] like Figure 5 As shown, the Fresnel lens assembly includes two Fresnel lenses. Preferably, the two Fresnel lenses are arranged in opposing orientations, i.e., the straight teeth 9 of the two Fresnel lenses face each other. The two Fresnel lenses are preferably positioned close together, reducing the thickness of the entire Fresnel lens assembly and achieving better optical performance. Alternatively, a gap can be provided between the two Fresnel lenses, secured with a highly transparent glue. Of course, the Fresnel lens assembly can also include more than two Fresnel lenses, with the number of Fresnel lenses used determined based on actual imaging needs. Adjacent Fresnel lenses can also be arranged in a combination of facing each other and facing away from each other.

[0067] The spur teeth 9 of adjacent Fresnel lenses are preferably perpendicular to each other. This can be done either perpendicularly to the point of contact or perpendicular in space, i.e., their projections onto a plane parallel to the substrate 8 are perpendicular to each other. For example, all spur teeth 9 on one Fresnel lens are arranged horizontally, while all spur teeth 9 on another adjacent Fresnel lens are arranged vertically. This facilitates adjustment and control while achieving better image quality while obtaining a magnified real image 5. Of course, the spur teeth 9 of two Fresnel lenses can also form an acute angle. This acute angle is the angle formed by the projections of the teeth of the two Fresnel lenses onto a plane parallel to the Fresnel lenses. This results in a tilted and rotated image, which can meet the needs of some special scenes.

[0068] like Figure 11As shown, the size and parameters of each Fresnel lens are preferably the same, so that the relevant parameters can be easily adjusted and calculated. However, Fresnel lenses of different sizes and parameters can also be combined according to actual needs. However, the general structure of the Fresnel lenses is the same, that is, each Fresnel lens includes a substrate 8 and straight teeth 9 provided on the substrate 8. The Fresnel lens used in this solution is different from ordinary Fresnel lenses. Conventional Fresnel lenses have a plurality of concentric ring-shaped teeth provided on the substrate 8, while this solution uses straight teeth 9, and the straight teeth 9 are arranged in parallel, that is, the teeth are no longer circular, but elongated. The straight teeth 9 are provided with a ridge 93 away from the top of the substrate 8, and the ridge 93 is parallel to the straight line of the substrate 8, as shown in FIG. Figures 8 to 10 As shown, the cross-sectional shape of the straight tooth 9 is preferably a triangle or a similar triangle. The cross-sectional shape is a triangle, i.e., a triangular prism. The best cross-sectional triangle is a right triangle. The so-called similar triangle is composed of a base 91 and two oblique sides 92 connected end to end. The base 91 is in contact with or overlaps with the substrate 8. The two oblique sides 92 can both be arc-shaped, or one oblique side 92 can be an arc and the other oblique side 92 can be a straight line. However, if both oblique sides 92 are arc-shaped, their intersection is not a smooth transition. Maintaining the intersection to form an edge line 93 can achieve better optical performance.

[0069] The height of the spur teeth 9 on the same substrate 8 follows the requirements of a Fresnel lens, gradually decreasing from the center to the sides. Specifically, the spur teeth 9 are highest in the center, with the spur teeth 9 on either side gradually decreasing in height. Furthermore, the angle between the hypotenuse 92 of the spur teeth 9 and the substrate 8 can vary, and these parameters can be adjusted accordingly based on the actual imaging effect. The substrate 8 can be rectangular, circular, or other shapes, depending on the actual layout and display requirements. The edges of the spur teeth 9 can be parallel or non-parallel to the sides of the substrate 8. The substrate 8 and spur teeth 9 are integrally manufactured from materials such as glass or plastic.

[0070] For the entire optical system, in order to rationalize the layout and improve space utilization, a first reflector 2 can be added between the image source 1 and the Fresnel lens, and a second reflector 4 can be added to the optical path between the Fresnel lens group and the real image 5. The second reflector 4 can be a car windshield or a separate reflective lens. If a car windshield is used, in order to eliminate ghosting, it is best to set the car windshield at this position to a wedge-shaped structure and use the reflector to adjust the direction of the light.

[0071] like Figure 2As shown in the figure, the image source 1 is vertically arranged, the Fresnel lens group is horizontally arranged, the first mirror 2 and the second mirror 4 are both at 45 degrees with the horizontal plane, the light emitted by the image source 1 is reflected by the first mirror 2 and vertically enters the Fresnel lens group, after refraction by the Fresnel lens group, the light is reflected on the second mirror 4, and a real image 5 is formed in the air through the reflection of the second mirror 4, and the user sees the image suspended in the air. The size of the real image 5 is larger than that of the image source 1, so it can be understood that an enlarged real image 5 is obtained.

[0072] As shown in the figure, Figure 6 , Figure 7 The orientation between the two Fresnel lenses can also be co-directional or opposite, and the co-directional arrangement is conducive to the parallel arrangement of multiple Fresnel lenses, and the installation of the Fresnel lenses is convenient during manufacturing, and the lenses can be arranged in the same direction; the opposite arrangement, that is, the substrates 8 of the two Fresnel lenses are close together, so that the two Fresnel lenses are easier to position, and the assembly precision can be better improved.

[0073] Example two:

[0074] As shown in the figure, Figure 3 , Figure 4 The difference from example one is that the image source 1 becomes a projector 6, such as a DLP projector 6 or a laser MEMS module. Because the light emitting characteristics of the image source 1 have changed, a diffusion sheet 7 is added between the projector 6 and the Fresnel lens group. The high divergence angle of the image source 1 expands the angle of observation of the real image 5. Generally, the light transmittance of the diffusion sheet 7 is 70%±10%, and the light transmittance is higher than 80%. The observer can see the bright projection point of the projector 6, and the light transmittance is lower than 60%. The image will be blurred and the brightness will not be enough, which will affect the user's use.

[0075] Example three:

[0076] As shown in the figure, Figure 12 , Figure 13 , Figure 14 The difference from examples one and two is that the imaging magnifier 3 is an array lens group, and the array lens group includes a plurality of lenses 31, and all the lenses 31 are arranged in a matrix.

[0077] In order to realize the enlarged real image 5, the array lens group generally adopts the principle of convex lens, and the distance between the image source 1 and the array lens group is kept between one and two focal lengths. The plurality of lenses can be understood as a combination of a plurality of individual lenses. In order to achieve better imaging effect, each lens can be made into a square shape, so that seamless splicing between adjacent lenses can be achieved. The so-called array arrangement is basically in the form of rows and columns. Generally, the number of rows is greater than or equal to two, and the number of columns is also greater than or equal to two.

[0078] like Figure 13 、 Figure 14 As shown, the lens can be a microlens or a Fresnel lens. The lens can be freely selected according to the design cost of the product. Of course, it can also be a glass convex lens. Each lens unit can be directly manufactured integrally on a substrate 8 during processing to reduce the impact of the gap between lenses on the imaging quality. The parameters of each lens can be exactly the same, and the lens parameters at different positions can be adjusted accordingly according to the characteristics of the displayed image.

[0079] Example 4:

[0080] like Figure 15 、 Figure 16 As shown, the difference from Examples 1 and 2 is that the imaging magnifier 3 is one of a Fresnel lens, a binary diffraction lens, a spherical lens, an aspherical lens, a free-form lens, or a flat microlens. The imaging magnifier 3 can be a single lens as described above, or a lens assembly formed by stacking the above lenses. Compared to the imaging magnifier 3 used in Examples 1 and 3, the above lens has a simpler structure and is suitable for applications where the imaging effect requirements are not too high, thus helping to reduce production costs.

[0081] Embodiment 5:

[0082] like Figure 17 、 Figure 18 The difference between the embodiment shown and the first and second embodiments is that the imaging magnifier 3 is a Fresnel reflector, a binary diffraction surface reflector, a spherical reflector, an aspherical reflector, or a freeform surface reflector. Compared to the lens in the first four embodiments, the image source 1 and the image can be located on the same side of the reflector, adding a variety of different positional relationships, facilitating selection based on different vehicle interior conditions.

[0083] Example 6:

[0084] Compared with the first five embodiments, the difference is that the image source 1 has more than one light source 32, and multiple light sources 32 are arranged in an array. During use, the images displayed by different light sources 32 can be adjusted according to the displayed image to obtain a better display effect. When multiple light sources 32 are combined with the array lens group in embodiment three, as shown in FIG. Figure 19 As shown, for example, in a display group composed of multiple LCD displays, multiple light sources 32 can also be arranged in an array form, and the number of light sources 32 can be equal to the number of lenses or can be unequal.

[0085] Embodiment seven:

[0086] like Figure 20 、 Figure 21As shown, a human-computer interaction in-vehicle assistance system employs any of the automotive air imaging devices of Examples 1 to 6. A gesture recognition device 10 is disposed near the formed real image 5. The specific location of the gesture recognition device within the real image is determined by the sensitivity of the gesture recognition device in combination with the structure of the mounting platform. The gesture recognition device 10 determines which command operation the user intends to perform within the current image. As the image becomes larger, the space occupied by the same content also becomes larger. Thus, the gesture recognition device 10 can easily identify which command pattern the user's gesture is intended to touch. Furthermore, when the user performs a sliding gesture, the sliding distance of the gesture also increases accordingly, significantly reducing the accuracy requirements for the gesture recognition device 10. This allows the gesture recognition device 10 to more accurately identify the user's operation and enhance the user experience.

[0087] In addition, a voice recognition device can be added. After the user sees the real image 5 formed by the air imaging device for the car, he or she can express the operation command he or she wants to perform through voice, which adds an additional command expression method and enhances the user experience.

[0088] Generally speaking, the image source 1 should be protected and installed in the vehicle dashboard, and the imaging magnifier 3 is generally installed in the dashboard. A window is opened on the dashboard to allow light to pass through. The window can be provided with a light-transmitting element such as glass to protect the imaging magnifier. The gesture recognition device 10 is generally installed in the dashboard near the real image 5, or on the ceiling of the cab above the real image 5, for identifying the user's hand operation instructions.

[0089] The first gesture recognition device solution uses an infrared camera. The light emitted from the image source passes through an imaging magnifier and is refocused into a real image in the air. After adjusting the distance and direction, the infrared camera's gesture perception range and the real image overlap. The infrared camera then recognizes the gesture and the ECU controls the image source screen to perform corresponding actions, such as zooming in, out, rotating left, right, up, and down, selecting, and returning.

[0090] In the embodiment of the present invention, the infrared camera can be a leap motion gesture recognition camera in the prior art. The ECU is a controller on the vehicle itself, or it can be a driving computer with a high-definition video output interface and a USB port in the prior art.

[0091] Of course, the infrared camera can select any other model of gesture recognition camera to recognize the operator's gestures and send signals to the ECU.

[0092] Leap Motion is a motion control device for PC and Mac and car computer, which is released by Leap, a motion control device manufacturer, on February 27, 2013. The Leap Motion controller does not replace the keyboard, mouse, stylus or touchpad, but works with them. When the Leap Motion software is running, just plug it into a Mac or PC or connect it to a compatible car ECU, and everything is ready. Without program changes and editing, you can browse the web, read articles, flip through photos, and play music and other daily operations on the computer by waving a finger.

[0093] The second scheme of the gesture recognition device adopts a 3D capacitive gesture recognition module. Light emitted by an image source is refocused into a real image in the air after passing through an imaging magnifier. The gesture sensing range of the 3D capacitive gesture recognition module overlaps the real image after distance and direction adjustment. Then the gesture is recognized by the 3D capacitive gesture recognition module, and the ECU controls the image source to make corresponding actions, such as zooming in, zooming out, rotating left and right, rotating up and down, selecting, returning, etc.

[0094] In the embodiment of the application, the 3D capacitive gesture recognition module adopts a mcg3140 chip of microchip company. The ECU is a controller of the vehicle itself, or can be a car computer with a high-definition video output interface and a USB port in the prior art.

[0095] The mcg3140 chip is a gesture recognition chip specially designed for the automotive field by microchip company, which has passed AECQ100 Grade 1 certification. Therefore, it can be easily used in the front or rear market; the detection distance is about 30 cm, and under proper design, it can fully meet the system requirements.

[0096] The third scheme of the gesture recognition device is to adopt a millimeter wave radar gesture recognition module. Light emitted by an image source is refocused into a real image in the air after passing through an imaging magnifier. The gesture sensing range of the millimeter wave radar gesture recognition module overlaps the real image after distance and direction adjustment. Then the gesture is recognized by the millimeter wave radar gesture recognition module, and the ECU controls the image source to make corresponding actions, such as zooming in, zooming out, rotating left and right, rotating up and down, selecting, returning, etc.

[0097] In the embodiment of the application, the millimeter wave radar gesture recognition module adopts an awr1642 chip of TI company. The ECU is a controller of the vehicle itself, or can be a car computer with a high-definition video output interface and a USB port in the prior art.

[0098] The awr1642 is a gesture recognition chip designed by TI specifically for the automotive industry. It has passed AEC Q100 certification, making it easily adaptable for both pre-installed and aftermarket applications. It is also unaffected by ambient light and inclement weather, ensuring all-weather operation.

[0099] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. An air imaging device for a car, installed in a car, characterized by: An image source for displaying patterns, wherein the image source is a projector, and the projector is a DLP projector or a laser MEMS module. A diffuser is provided between the projector and the array lens assembly, and the transmittance of the diffuser is 70% ± 10%; and an imaging magnifying glass for refracting light emitted by an image source to form a magnified real image in the air, wherein the imaging magnifying glass is an array lens group; The distance between the image source and the array lens group is one to two times the focal length; The array lens group includes a plurality of lenses, each of which is a Fresnel lens. All lenses are arranged in a matrix, each lens is a square, and adjacent lenses are seamlessly spliced; A first reflector is further provided on the optical path between the image source and the array lens group; and / or a second reflector is provided on the optical path between the array lens group and the real image, and the second reflector is a car windshield.

2. The automotive air imaging device according to claim 1, wherein: An automobile windshield is provided on the optical path between the array lens group and the real image, and a wedge-shaped glass is provided at a position corresponding to the automobile windshield and the imaging magnifying glass.

3. The air imaging device for automobile according to claim 1, wherein: The image source is one or more light sources.

4. The air imaging device for automobile according to claim 3, wherein: When the image source is a plurality of light sources, the light sources are arranged in a matrix.

5. The air imaging device for automobile according to claim 1, wherein: The size of the imaging magnifier is larger than the size of the formed real image.

6. Human-computer interaction vehicle assistance system, characterized by: The automotive air imaging device according to any one of claims 1 to 5 is used, wherein a gesture recognition device is further provided near the real image.

7. The human-computer interaction vehicle assistance system according to claim 6, characterized in that: The human-computer interaction vehicle assistance system also includes a voice recognition device that collects user voice and combines it with real image display content.

8. The human-computer interaction vehicle assistance system according to claim 6, characterized in that: The image source is installed in the vehicle instrument panel, the imaging magnifier is installed inside the instrument panel, and the gesture recognition device is installed in the instrument panel near the real image or on the ceiling of the vehicle cab.

Images