JP2019045843A - Optical projection system - Google Patents

Abstract

To provide an optical projection system that uses a combination of a reflection mirror, reflection curve mirror and optical lens to achieve virtual image formation by a triangle image formation technique, and can effectively contract a necessary volume of the lens.SOLUTION: An optical projection system of the present invention includes, as a main structure: a housing 5a; at least one coupling part; and an image formation unit, a reflection mirror, a reflection curved mirror and at least one optical lens that are installed in the housing. The image formation unit is configured to project at least one plan image. The reflection curved mirror, which is installed on one side of the image formation unit, is configured to receive the plan image and reflect the plan image. Further, the reflection curved mirror, which is installed on a reflection route of the reflection mirror and used in adjusting an image formation route and reducing a virtual image distortion, is configured to project the plan image on windshield glass, cause the plan image to be reflected to an eye of a user, and cause a virtual image of the plan image to be image-formed outside the windshield glass. The at least one optical lens, which is installed on the image formation route, is configured to enlarge the plan image.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an optical projection system, and in particular, a head-up display technology of simple construction, small in volume, capable of virtual imaging at a long distance, with low aberration, coupled into a removable housing, to head-up display The present invention relates to an optical projection system having the convenience of the aftermarket product market.

  The Head Up Display (HUD) enables the user to view forward scenery and at the same time view the projected virtual image information of the head up display, and it is necessary to look down the meter panel The head-up display of automobiles is currently becoming a major trend because of its convenience and the safety it brings.

  Reference is made to the schematic drawing illustrating the implementation of the conventional head-up display of FIG. The head-up display includes a case 91, and an imaging device 92 capable of emitting image information is installed in the case 91, and the vehicle windshield glass 95 in front of the driver via the at least two optical mirrors 93 and 94. And, after reflection, display a virtual image of the image information to make it visible to the driver. Among them, since the case 91 of the head-up display projects a two-dimensional image with a constant field of view (FOV), to project a two-dimensional image toward the windshield glass 95 by two optical mirrors 93 and 94, If it is necessary to have a fixed volume and this Case 91 is mounted in a limited space in front of the car driver's seat, if you do not want to sacrifice the foreground of the car, install it in the space in the meter panel before shipping the car. Because of the need and because the optical path is vertical, the volume of the case 91 is thick, making it very difficult to incorporate.

  However, in order to reduce the volume of the head-up display, or to make the whole thin, three optical design problems are encountered: enlargement of virtual image, field of view, and aberration. When a small projector or liquid crystal display (LCD) is used as a display device, it is necessary to combine back end virtual image relay optics (Relay Optics) in order to realize a long distance virtual image head-up display. However, designing a virtual image relay optical system is not easy, and a simple optical structure can not be used to effectively eliminate large field aberrations, and less information is displayed when the field range is small. The application effect of the head-up display is limited. Besides, the windshield glass is irregularly curved, and when it is reflected to the eye, the distortion of the image is aberrated, it is very difficult to remove the distortion and aberration of the image, and the surface mirror has a large area. It is necessary to solve the problem of aberration by adding an aspheric surface (Aspherical Surface) or other lenses, which increases the manufacturing cost of parts and increases the difficulty of production assembly. Because of this, the penetration rate of head-up displays in automobiles is not increasing at present.

  Therefore, how to solve the problems and drawbacks of the conventional products described above and achieve enlargement of a virtual image and eliminate image distortion and aberration by the windshield glass to improve the overall image quality, The inventor of the present invention and a related company engaged in this industry have a direction to study improvement.

  In view of the above-mentioned drawbacks, the inventor of the present invention has repeatedly collected trial samples and changes based on many years of experience after collecting relevant samples, evaluating and studying in various fields, and engaging in the industry. The invention's simple, small-volume, long-distance virtual imaging, low-aberration head-up display technology combined in a removable housing, head-up display for aftermarket product market convenience And is a patented design of an optical projection system.

  The main object of the present invention is to use a combination of a reflecting mirror, a reflecting curved mirror and an optical lens to achieve virtual imaging at a long distance with triangular imaging technology, effectively reducing the required volume of the lens It is possible to provide an optical projection system.

  Another main objective of the present invention is to provide an optical projection system with the convenience of the aftermarket market, which allows the optical projection system to be coupled into the housing and be coupled to the outside of the meter panel simply and quickly. It is in.

  To achieve the above objective, the main structure of the present invention includes a housing, and at one side of the housing, at least one coupling portion used for removably installing the housing on the outside of the meter panel is defined And an imaging unit for projecting at least one scheduled image on the housing, located on one side of the imaging unit in the housing and used to receive and reflect the scheduled image A reflecting mirror is installed, and a reflecting curved mirror located on the reflecting path of the reflecting mirror is installed in the housing and used for adjusting the imaging path and reducing virtual image aberration, and the scheduled image on the windshield glass Onto the housing, and reflect it onto the outside of the windshield glass, reflecting it on the eye of the user, and projecting it onto the outside of the windshield glass. At least one optical lens located on the imaging path is installed and used to magnify the scheduled image, the imaging unit projects the scheduled image when the user uses the invention as a head-up display, After being reflected by the reflecting mirror, it is projected on the reflecting curved mirror, the imaging path is adjusted to correct the aberration, the planned image is further enlarged by the optical lens in the path, and the planned image is used by the windshield glass user And reflect off the windshield glass to form a virtual image of the predetermined image, thereby realizing the principle of triangular imaging with a simple structure in a relatively small space, an imaging range To reduce the problem of aberration and to be easily incorporated out of the meter panel through the housing, and to the aftermarket according to the present invention. Convenience of the product market and be provided with a development property.

  Through the above-mentioned technology, there are problems such as too large volume existing in the conventional head-up display, small imaging field range, image aberration prone, complicated structure design, lack of convenience when incorporating a vehicle, etc. It is possible to solve and achieve practical inventive step with the above mentioned advantages.

FIG. 1 is a schematic view showing an implementation of a conventional head-up display. It is a mirror surface positional relationship figure of the preferred embodiment of the present invention. FIG. 2 is a schematic view showing an imaging path of a preferred embodiment of the present invention. FIG. 7 is a perspective view of another preferred embodiment of the present invention. FIG. 7 is a schematic view showing the installation of another preferred embodiment of the present invention. FIG. 6 is a schematic view showing the implementation of another best embodiment of the present invention. FIG. 6 is a schematic view showing the structure of still another preferred embodiment of the present invention. FIG. 6 is a schematic view showing the structure of still another preferred embodiment of the present invention.

  In order to achieve the above objects and effects, technical means and structure adopted by the present invention will be described in detail below in combination with the drawings and the best embodiment of the present invention so that the features and functions can be completely understood. .

FIGS. 2 and 3 show a mirror positional relationship diagram and a schematic view of an imaging path, respectively, according to a preferred embodiment of the present invention. As can be clearly seen from these figures, the optical projection system according to the invention comprises an imaging unit 1, a reflector 2, a reflective curved mirror 3 and at least one optical lens 4,
The imaging unit 1 projects at least one scheduled image 12;
The reflecting mirror 2 is disposed at one side of the imaging unit 1 to receive and reflect the expected image 12;
The reflecting curved mirror 3 is disposed on one side of the imaging unit 1 and located on the reflecting path of the reflecting mirror 2 and used for adjusting the imaging path and reducing the aberration of the virtual image, and the scheduled image 12 Is projected onto the windshield glass 7 and further reflected to the eyes of the user, and a virtual image of the predetermined image 12 is imaged outside the windshield glass 7, and the reflecting curved mirror 3 includes a plurality of curvatures. , And the curvature is defined by a mathematical equation,
The at least one optical lens 4 is placed on the imaging path to magnify the predetermined image 12 and the optical lens 4 is a Fresnel lens and a protective layer 41 on the optical lens 4 Is provided.

  Among them, a first included angle α is defined between the imaging unit 1 and the reflecting mirror 2, and a second included angle β is defined between the reflecting mirror 2 and the reflecting curved mirror 3. A third included angle γ is defined between the reflecting curved mirror 3 and the first included angle α is 15 to 70 degrees, and the second included angle β is 30 to 90 degrees, the third The included angle γ is 75 to 140 degrees, and the optimum value of the first included angle α is 30 to 40 degrees, and the optimum value of the second included angle β is 50 to 60 degrees, The optimum value of the third included angle γ is 95 degrees to 105 degrees.

  The optical projection system of the present invention mainly comprises the imaging unit 1, the reflecting mirror 2 (plane mirror or convex mirror), the reflecting curved mirror 3, and the optical lens 4 Although it is preferably a Fresnel lens, it may be a convex lens or an optically transparent thin material or the like) and the windshield glass 7 in combination to form a virtual image of a long distance. Among them, since the imaging unit 1, the reflecting mirror 2 and the reflecting curved mirror 3 are located on the same horizontal plane, the imaging unit 1 preferably sideways the projected image 12 with parallel light on the reflecting mirror 2 , And use the free curved reflective curved mirror 3 to change the path of the reflected light and emit it upward (in this case, the imaging path acquires a vertical component directed upward from the reflective curved mirror 3). ) At the same time to achieve the purpose of correcting the aberration, and since the optical lens 4 is provided with the protective layer 41 and has a dustproof protection function, imaging of a separately installed translucent member (plastic, glass, acrylic, etc.) The influence on the effect can be avoided. Among them, since the reflecting curved mirror 3 contains a plurality of curvatures, it is possible to correct the aberration entirely in accordance with the diverging distance and angle of the reflecting mirror 2. Therefore, the curvature of the reflecting curved mirror 3 is not a fixed curvature, but one mathematical equation is derived through precise calculation, and the reflecting curved mirror 3 having these special curvature designs is manufactured based on the mathematical equation. . The mathematical equation is as shown in the following equation (1):

  The scheduled image 12 is expanded primarily by the reflecting curved mirror 3 and passes through the imaging path after the turning of the reflecting curved mirror 3 and the expanding effect of the optical lens 4 to make the projected image 12 a window. The projected image 12 is projected onto the shield glass 7, reflected by the windshield glass 7 to the eyes of the user, and refracted outside the windshield glass 7 to form a virtual image of the projected image 12 (front of the user) About 2 meters). As described above, according to the above-described structure, the arrangement of the first included angle α, the second included angle β, and the third included angle γ is combined to achieve virtual imaging at a long distance by triangular imaging technology, and the optical lens Since 4 is a Fresnel lens, the required volume of the lens can be effectively reduced and at the same time the problem of aberration can be overcome.

  At the same time, a perspective perspective view of another preferred embodiment of the present invention shown in FIGS. 4, 5 and 6, a schematic diagram showing the installation and a schematic diagram showing the implementation are simultaneously referred to. As can be clearly seen from these figures, this embodiment places the optical projection system described above in the housing 5a. Among them, at least one coupling portion 51a is defined at one side of the housing 5a, and the housing 5a is removably installed on the outside of the meter panel. The imaging unit 1a is disposed on the housing 5a, the reflecting mirror 2a and the reflecting curved mirror 3a are disposed in the housing 5a, and the optical lens 4a is disposed within the visible range of the top surface of the housing 5a. Further, a wireless connection module 11a electrically connected to the imaging unit 1a is installed in the housing 5a, and wirelessly connected to the electronic terminal 8a to receive the planned image 12a and transmit it to the imaging unit 1a. Used for As a result, the optical projection technique described above can reduce the required volume of the lens (including the size of the lens itself and the spatial position between the lenses), so that it can be reliably incorporated into the housing 5a, and the coupling portion 51a of the housing 5a The convenience of the aftermarket product market, because the combination of the above makes it easy for the user to mount on the outside of the meter panel, and it is not necessary to borrow the hands of specialists, and of course there is no need to embed it ahead of the driver's seat before shipping the car. Have sex. Among them, the connecting portion 51a can be a non-slip structure, an adhesive structure, or a fitting positioning structure (can be extended and fixed to the front edge of the meter panel or the air outlet on one side of the windshield glass 7a).

  Also, at the same time, reference is made to the schematic diagram of still another preferred embodiment of the present invention in FIG. As can be clearly seen from this figure, although this embodiment and the above-described embodiment are substantially the same, at least one angle adjustment device 6b is mounted on the housing 5b and the imaging path is ejected from the housing 5b. The points used to change the angle of Among them, the angle adjustment device 6b is a universal adjuster, which is installed outside the housing 5b, and the user can adjust the housing 5b directly and manually to properly adjust the final imaging effect.

  Furthermore, at the same time, reference is made to the schematic diagram of yet another embodiment of the present invention in FIG. As can be clearly seen from this figure, the present embodiment is substantially the same as the above-described embodiment, but the angle adjusting device 6c further comprises at least one drive member 61c and a memory unit 62c used for recording angle parameters, The operation module 63c is installed on the housing 5c and electrically connected to the drive member 61c and the memory unit 62c. The operation module 63c is used to select the angle parameter and set the drive member 61c. Thereby, the user can set different imaging angles using the angle adjustment device 6c based on different vehicle types and different windshield glass angles. At the time of actual operation, the angular parameter set stored in advance in the memory unit 62c is selected using the operation module 63c on the housing 5c, and the imaging unit 1c, the reflecting mirror 2c, and the reflecting curved surface are selected through the driving member 61c after selection. The angular positional relationship of the mirror 3c can be controlled automatically and adapted to various vehicle types.

  The above description shows the best embodiment of the present invention, and the patent scope of the present invention is not limited by this, and simple modifications and equivalents which operate the contents of the specification and the drawings of the present invention. Any structural change of the effect is included within the patent scope of the present invention.

  Summarizing the above, since the optical projection system of the present invention can reliably achieve its effect and purpose in use, the present invention is a highly practical creation and meets the patent application requirements, The application is filed here under the law, and it is hoped that the examiner ratifies the present invention at an early stage and guarantees the inventor's creative effort.

[Explanation of the code of the present application]
DESCRIPTION OF SYMBOLS 1, 1a, 1c Imaging unit 11a Wireless connection module 12, 12a Planned image 2, 2a, 2c Reflective mirror 3, 3a, 3c Reflective curved mirror 4, 4a Optical lens 41 Protective layer 5a, 5b, 5c Housing 51a Coupling part 6b , 6c Angle adjustment device 61c Drive member 62c Memory unit 63c Operation module 7, 7a Windshield glass 8a Electronic terminal α 1st included angle β 2nd included angle γ 3rd included angle [explanation of symbols of conventional products]
91 Case 92 Imaging Device 93 Mirror 94 Mirror 95 Windshield Glass

Claims (8)

An optical projection system, comprising: an imaging unit, a reflector, a reflective curved mirror, and at least one optical lens
The imaging unit projects at least one predetermined image;
The reflective curved mirror is disposed on one side of the imaging unit to receive and reflect the expected image;
The reflecting curved mirror is disposed on one side of the imaging unit and located on the reflecting path of the reflecting mirror, used for adjusting the imaging path and reducing virtual image aberration, and the planned image being a windshield Project onto the glass for further reflection to the user's eyes, and image the virtual image of the expected image on the outside of the windshield glass,
The at least one optical lens is mounted on the imaging path to magnify the predetermined image,
An optical projection system characterized in that.   The optical lens is a Fresnel lens, and a protective layer is provided on the optical lens, the reflecting curved mirror includes a plurality of curvatures, and the plurality of curvatures are defined by mathematical equations. An optical projection system according to claim 1, characterized in that.   A first included angle is defined between the imaging unit and the reflecting mirror, a two included angle is defined between the reflecting mirror and the reflecting curved mirror, and a third included angle is formed between the imaging unit and the reflecting curved mirror Are defined, and the first included angle is 15 to 70 degrees, the second included angle is 30 to 90 degrees, the third included angle is 75 to 140 degrees, and (1) the optimum value of the included angle is 30 to 40 degrees, the optimum value of the second included angle is 50 to 60 degrees, and the optimum value of the third included angle is 95 to 105 degrees; An optical projection system according to claim 1, characterized in that   The imaging unit, the reflecting mirror, and the reflecting curved mirror are disposed in the same horizontal plane, and the imaging path is made to obtain a component in the vertical direction only from the reflecting curved mirror. Optical projection system as described.   The housing is installed, the coupling portion is defined on one side of the housing, the housing is removably installed on the outside of the meter panel, the imaging unit and the optical lens are installed on the housing, and the reflection is An optical projection system according to claim 1, characterized in that a mirror and said reflecting curved mirror are mounted in said housing.   The wireless connection module electrically connected to the imaging unit is installed in the housing, and is used to receive the scheduled image and transmit it to the imaging unit. Optical projection system.   7. An optical projection system according to claim 6, characterized in that at least one angle adjustment device is mounted on the housing and that the imaging path is used to change the angle emitted from the housing.   The optical projection system according to claim 1, characterized in that the reflecting mirror is either a plane mirror or a convex mirror.

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