CN104554004A - Digital heads up display system - Google Patents
Digital heads up display system Download PDFInfo
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- CN104554004A CN104554004A CN201310501328.7A CN201310501328A CN104554004A CN 104554004 A CN104554004 A CN 104554004A CN 201310501328 A CN201310501328 A CN 201310501328A CN 104554004 A CN104554004 A CN 104554004A
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- concave mirror
- display system
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- eye lens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/30—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of image processing
Abstract
An embodiment of the invention provides a digital heads up display system in order to solve the problem that a driver needs to roll eyes to observe road conditions and information on a front windshield glass or a diffusive imaging unit and consequently feels vision fatigue since an existing digital heads up display system directly images on the front windshield glass or diffusive imaging unit. The digital heads up display system mounted on a dashboard comprises a housing, a miniature projector and a concave mirror. The miniature projector and the concave mirror are assembled in the housing, and the optical length between the miniature projector and the concave mirror is smaller than the focal length of the concave mirror. The housing is provided with a projection outlet. Light reflected by the concave mirror is emitted through the projection outlet. Switching to and fro of eyeball focal length during driving is avoided, and the purpose of safety driving is achieved. After the images are zoomed out, more automobile information can be displayed on the heads up display system, so that the digital heads up display system is richer in content and more powerful in function. Besides, the digital heads up display system is simple in structure and easy to implement.
Description
Technical field
The present invention relates to automotive field, especially installing and the new line digital display system on fascia.
Background technology
As everyone knows, on automobile for convenience of driver and crew to the control of vehicle, generally be provided with various combination instrument or multimedia, this makes driver see that combination instrument and multimedia are to obtain information of vehicles needing on the run to bow, and what this was of short duration often brings unnecessary risk to driving in a flash.
For solving this risk, the new line digital display system used aboard (English full name: Heads Up Display is called for short HUD) is transplanted on vehicle by people, is a set of intelligentized head-up display system.
Existing new line digital display system is generally following scheme, comprise an image generation device and a diffusion imaging unit, image generation device is installed on instrument panel, in order to produce the visible ray of signal of video signal, diffusion imaging unit can in order to receive from the visible ray of image generation device, to form entity image on diffusion imaging unit.This mode due to the range of scatter of diffusion imaging unit limited, if will obtain a larger image, need the diffusion imaging unit that is larger, this will block the field range of driver to a great extent.In addition, the program generally uses LCD screen as real image carrier, due to the limited brightness that dot matrix screen or the tip of the brushstyle of a writing or painting shield, this can cause become image to show the problems such as unintelligible under outside high light, meanwhile, driver still needs to switch eyeball focal length back and forth to observe the information on road conditions and diffusion imaging unit in driving procedure.
In addition, as another kind of alternative, also have and directly the visible ray of image generation device is directly incident upon on front windshield, the mode of front windshield reflected image.Because the direct imaging of program solid images is on front windshield, so driver needs equally to switch eyeball focal length back and forth to observe the information on road conditions and front windshield in driving procedure, this will increase the visual fatigue degree of human pilot to a great extent, bring unnecessary risk to safe driving.
Summary of the invention
Directly on front windshield or diffusion imaging unit, real image is become for solving existing new line digital display system, human pilot needs to switch back and forth eyeball focal length to observe the information on road conditions and front windshield or diffusion imaging unit, cause the problem increasing human pilot visual fatigue degree, embodiments provide a kind of new line digital display system.
The new line digital display system that the embodiment of the present invention provides, it is installed on fascia, comprises housing, micro projector and concave mirror;
Described micro projector and described concave mirror are installed in described housing, and the light path between described micro projector and described concave mirror is less than the focal length of described concave mirror; And being provided with projection outlet on the housing, the light after concave mirror is through this projection outlet injection.
Due to the new line digital display system that the embodiment of the present invention adopts, adopt the array mode of micro projector and concave mirror, micro projector is placed in the focal length of concave mirror, like this from the real image that micro projector projects, an amplification, the virtual image at a distance can be obtained by concave mirror, project image onto in driver's seat by front windshield again, such driver just can see a picture rich in detail in vehicle front larger distance, thus avoid the switching back and forth of eyeball focal length in driving procedure, reach the object of safe driving.In addition, more information of vehicles, by after amplification, can show, make new line digital display system content abundanter, with better function by image on head-up-display system.And structure is relatively simple, easy to implement.
Preferably, also comprise a fly's-eye lens, described fly's-eye lens is installed in the light path between described micro projector and concave mirror, and the light path between described fly's-eye lens and described concave mirror is less than the focal length of described concave mirror.Adopt this fly's-eye lens, make the image quality that casts out more clear.
Preferably, in the light path between described fly's-eye lens and concave mirror, be provided with the first reflecting part.Adopt this first reflecting part, light transmission direction can be changed, make in effective space, the light path between fly's-eye lens and concave mirror can be extended as required.
Preferably, be provided with a transparent sealing sheet material in described projection exit, with by airtight for described projection outlet, prevent dust from entering in housing.Adopt this transparent sealing sheet material to ensure its light transmission on the one hand, play isolated extraneous on the other hand, prevent the effect that dust enters.
Preferably, the light path between described fly's-eye lens and micro projector is provided with the second reflecting part.Equally, this second reflecting part also as required, can reasonably extend the light path between its fly's-eye lens and micro projector, ensures fly's-eye lens energy blur-free imaging.
Preferably, also comprise highly reflecting films, described highly reflecting films are attached to front windshield inner surface of automobile, in order to the light of reflection from described projection outlet injection.Owing to having this highly reflecting films, can, by most for new line display instrument light reflection, avoid image light too much to lose, formed by its reflection ray reverse extending, the virtual image be more clear, also avoids forming ghost image on front windshield simultaneously.
Preferably, the radius of the lenslet on described fly's-eye lens is 0.01-0.05mm.Adopt the fly's-eye lens of radius in this numerical range of lenslet, its imaging definition is higher.
Preferably, described micro projector, fly's-eye lens, the first reflecting part, concave mirror etc. are all installed in housing, in integrative-structure; Described integrative-structure is installed in the pockets on fascia.Adopt the scheme of this kind of integrative-structure, its install, safeguard convenient.
Preferably, described transparent sealing sheet material is the arc shape of indent, and its thickness is 0.3-0.5mm.Because its transparent sealing sheet material is arc shape, be therefore conducive to increasing structural strength, simultaneously also can reflecting part extraneous light, and the thickness of clear sheet is very little, can effectively avoid ghost image appears in seal stock.
Accompanying drawing explanation
The new line digital display system module diagram that Fig. 1 provides for the specific embodiment of the invention;
The concave mirror one-tenth amplification virtual image principle schematic of Fig. 2 for providing in the specific embodiment of the invention.
Wherein, 1, housing; 2, micro projector; 3, fly's-eye lens; 4, the first reflecting part; 5, concave mirror; 6, transparent sealing sheet material; 7, front windshield; 8, projection outlet.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment
As shown in Figure 1, this example will be specifically described new line digital display system, and it is installed on fascia, comprise housing 1, micro projector 2 and concave mirror 5;
Described micro projector 2 and described concave mirror 5 are installed in described housing 1, and the light path between described micro projector 2 and described concave mirror 5 is less than the focal length of described concave mirror 5; And on described housing 1, being provided with projection outlet 8, the light after concave mirror 5 reflects is through this projection outlet 8 injection.
Under this routine said new line digital display system is arranged on instrument desk, top is equal with instrument table top; Its emergent ray directive front windshield 7.Projected image onto in driver's seat by front windshield 7 again.
Micro projector 2 is conventionally known to one of skill in the art, there is RGB(red, green, blue inside) three light sources, by the English full name of DMD(: Digital Micro mirror Device, Chinese full name: digital micromirror elements) control emergent light, then amplify through lens.DMD device is made up of many small reflex reflector lens, and each eyeglass is equivalent to a pixel, and these small reflex reflector lens all left floating and can tilt about 10-12 ° to both sides, thus can form unblank and disconnect two kinds of duties.In order to obtain different brightness, the speed of its unblank and disconnection can also change, handy thousands of reflex reflector lens during work, and by the English full name of DLP(: Digital Light Procession, Chinese full name: digital light process) plate controls.DLP plate first signal of video signal through digital processing, and then light to be projected through DMD.Controlling relevant position point by the angle controlling each small reflective mirror is stain or bright spot, then is obtained the picture of various color by the superposition of RGB color.Micro projector 2 size adopted in this example is very little, such as can adopt and be of a size of about 48*42*10mm.Due to the brightness decision sharpness of final projected image of micro projector 2, under strong daylight, still clearly image can be seen in order to driver can be made, the luminous intensity of micro projector 2 should be tried one's best greatly, can adjust through test, ensure that it also clearly can see image under strong daylight, find through test, advise that its illumination is greater than 80lux(lux).
Concave mirror 5 is one of vitals in whole system, can by Nonlinear magnify by concave mirror 5, and the imaging of image (virtual image) distance can be expanded, if the radius of concave mirror 5 is R, its material selection PC(polycarbonate)/ABS(acrylonitrile-butadiene-styrene copolymer) to reach required intensity, PC/ABS is polycarbonate and acrylonitrile-butadiene-styrene copolymer and potpourri, it combines the excellent specific property of bi-material, the mouldability of ABS material and the character such as the mechanicalness of PC, impact strength and heatproof, uvioresistant (UV).The inner concave of concave mirror 5 is as light reflection face, and the outer convex surface electroplating gold on surface of relative inner concave belongs to particle, improves the reflectivity of minute surface.
Need the image (or image) projected in projector to amplify process in this example, therefore, according to optical imaging concept, need thing to be placed in the focal length of concave mirror 5.Its concrete principle is participated in 5 one-tenth, concave mirror shown in Fig. 2 and is amplified virtual image principle schematic.In Fig. 2, AB is real image, and the distance between itself and concave mirror 5 is the incident ray that V, A point sends, and after the concave reflection of concave mirror 5, the reverse extending line intersection point A ' of its reflection ray is A point virtual image point formed by concave mirror 5.The incident ray that B point sends, after the concave reflection of concave mirror 5, the extended line of its reflection ray forms virtual image point B ', and the image be made up of A ' B ' is AB formed virtual image on concave mirror 5.The horizontal range of virtual image A ' B ' distance concave mirror 5 is U; As seen from Figure 2, this virtual image is exaggerated, be the upright virtual image, and image-forming range strengthens at double.
Concave mirror 5 also needs certain condition in the upright virtual image of amplifying, and when thing is positioned within focus, becomes the virtual image of upright amplification, general focal length is after the concave mirror 5 in front center of circle, but not at R/2 place, if incident ray is paraxial rays, then can be similar to and thinks that focal length is at R/2 place.Therefore, require that the distance between thing and concave mirror 5 is less than R/2.
Due to the new line digital display system that this example adopts, adopt the array mode of micro projector 2 and concave mirror 5, micro projector 2 is placed in the focal length of concave mirror 5, like this from the real image that micro projector 2 projects, an amplification, the virtual image at a distance can be obtained by concave mirror 5, project image onto in driver's seat by front windshield 7 again, such driver just can see a picture rich in detail in vehicle front larger distance, thus avoid the switching back and forth of eyeball focal length in driving procedure, reach the object of safe driving.In addition, more information of vehicles, by after amplification, can show, make new line digital display system content abundanter, with better function by image on head-up-display system.And structure is relatively simple, easy to implement.
As preferred embodiment, as shown in fig. 1, also comprise a fly's-eye lens 3, described fly's-eye lens 3 is installed in the light path between described micro projector 2 and concave mirror 5, and the light path between described fly's-eye lens 3 and described concave mirror 5 is less than the focal length of described concave mirror 5.Namely fly's-eye lens 3 is arranged on the projection dead ahead of micro projector 2, adopts this fly's-eye lens 3, makes the image quality that casts out more clear.Fly's-eye lens 3 is conventionally known to one of skill in the art, it is the lens formed after array arrangement by some lenslets, it is inner that micro projector 2 and fly's-eye lens 3 are integrally arranged on housing 1, its effect is that meter information and navigation information etc. are shown as image on fly's-eye lens 3, namely fly's-eye lens 3 is equivalent to a screen, also need output as much as possible for the light of become image, its transmitance is more than 88% simultaneously.The material of its fly's-eye lens generally adopts PC(polycarbonate).The radius r of the lenslet on described fly's-eye lens 3 is 0.01-0.05mm.Such as this example gets its radius r=0.015mm.Adopt the fly's-eye lens 3 of radius in this numerical range of lenslet, its imaging definition is higher.Light path between definition fly's-eye lens 3 to concave mirror 5 is L, and make the virtual image of concave mirror 5 in upright amplification, then require that the light path L between fly's-eye lens 3 and concave mirror 5 should be less than the focal length of this concave mirror 5, namely this fly's-eye lens 3 drops in the focal length of concave mirror 5.So, can by the virtual image of formed real image in upright amplification after concave mirror 5 reflects on fly's-eye lens 3.
As preferred embodiment, in the light path between described fly's-eye lens 3 and concave mirror 5, be provided with the first reflecting part 4.First reflecting part 4 can be plane mirror or reflecting prism.One piece or polylith can be set to as required.As shown in fig. 1, the first reflecting part 4 is arranged on the dead ahead of projection ray, with fly's-eye lens 3 at angle, this angle depends on the shooting angle of concave mirror 5 glazed thread.Concave mirror 5 is installed on the direction of the first reflecting part 4 reflection rays, angled with surface level, to make its emergent ray effectively project on front windshield 7, then is projected image onto in driver's seat by front windshield 7.The Main Function of this first reflecting part 4 changes light transmission direction, and the light path L of light transmission between fly's-eye lens 3 to concave mirror 5 can be increased in limited spatial dimension, this light path L is definition like this, as shown in fig. 1, light path between definition fly's-eye lens 3 to the first reflecting part 4 is a, the light path defined between the first reflecting part 4 to concave mirror 5 is b, light path L=a+b then between described fly's-eye lens 3 to concave mirror 5, the surface reflectivity of the first reflecting part 4, preferably more than 95%, is avoided losing in light reflection process.Projection outlet 8 injection of light after the reflection of this concave mirror 5 on housing 1.Adopt this first reflecting part 4, light transmission direction can be changed, make in effective space, the light path L between fly's-eye lens 3 and concave mirror 5 can be extended as required.
Meanwhile, as shown in Figure 1, be provided with a transparent sealing sheet material 6 at described projection outlet 8 place, with by airtight for described projection outlet 8, prevent dust from entering in housing 1.This transparent sealing sheet material 6 role is separated built-in system and external environment condition, internal optics is avoided to be polluted, because seal stock is insulating effect, so require that the light transmission of sheet material will be got well, there are certain intensity, toughness and the characteristic such as high temperature resistant.Adopt this transparent sealing sheet material 6 one aspect to ensure its light transmission, play isolated extraneous on the other hand, prevent the effect that dust enters.Preferably, described transparent sealing sheet material 6 is the arc shape of indent, and its thickness is 0.3-0.5mm.Because its transparent sealing sheet material 6 is arc shape, be therefore conducive to increasing structural strength, simultaneously also can reflecting part extraneous light, and the thickness of clear sheet is very little, can effectively avoid ghost image appears in seal stock.This transparent sealing sheet material 6 generally selects PC material to make.
As preferred embodiment, the light path between described fly's-eye lens 3 and micro projector 2 can also be provided with the second reflecting part.So-called second reflecting part can be 1 or multiple, and similarly, this second reflecting part can be plane mirror or reflecting prism.This second reflecting part also as required, can reasonably extend the light path between its fly's-eye lens 3 and micro projector 2, ensures that fly's-eye lens 3 can blur-free imaging.
The above-mentioned micro projector 2, fly's-eye lens 3, first reflecting part 4, concave mirror 5 etc. mentioned all is installed in housing 1, in integrative-structure; Described integrative-structure is installed in the pockets on fascia.When generally this integrative-structure being installed in pockets, being also provided with buckle structure, both buckles are fixed.Adopt the scheme of this kind of integrative-structure, its install, safeguard convenient.
The light reflection that new line display instrument projects by front windshield 7 to driver within sweep of the eye, under outside high light, on front windshield 7 image still can be seen more clearly in order to make driver, preferably also comprise highly reflecting films, described highly reflecting films are attached to shield glass 7 inside surface, the light penetrated from described projection outlet 8 in order to reflection.Owing to having this highly reflecting films, can, by most for new line display instrument light reflection, avoid image light too much to lose, formed by its reflection ray reverse extending, the virtual image be more clear, also avoids forming ghost image on front windshield 7 simultaneously.The program directly uses highly reflecting films to be attached on front windshield 7, does not need the optical glass sheet being with the angle of wedge, is convenient to the installation upgrading of later product.
Owing to adopting the scheme of this example, first program use micro projector 2 and fly's-eye lens 3 are combined into the traditional LCD screen imaging of picture replacement for they, the heat that its micro projector 2 distributes is much smaller than existing traditional head-up-display system, therefore, without the need to arranging radiator structure, or only need to design miniature thermal component.As preferred mode, this example preferably installs a miniature thermal component in housing 1, about this miniature thermal component only has the half of micro projector 2 size, is far smaller than the volume of radiator structure in existing new line display instrument.
In sum, the micro projector 2 adopting this example to provide, fly's-eye lens 3 and concave mirror 5 are combined into the scheme that picture replaces, relative to traditional LCD screen imaging, program image quality is high, brightness is high, thermal value is relatively little, image projection distance can be strengthened, image also can correspondingly amplify, compared with prior art more humane.The switching back and forth of eyeball focal length in driving procedure can be avoided, reach the object of safe driving.More information of vehicles, by after amplification, can show, make new line digital display system content abundanter, with better function by image on head-up-display system.And structure is relatively simple, easy to implement.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a new line digital display system, is characterized in that, it is installed on fascia, comprises housing, micro projector and concave mirror;
Described micro projector and described concave mirror are installed in described housing, and the light path between described micro projector and described concave mirror is less than the focal length of described concave mirror; And being provided with projection outlet on the housing, the light after concave mirror is through this projection outlet injection.
2. new line digital display system according to claim 1, it is characterized in that, also comprise a fly's-eye lens, described fly's-eye lens is installed in the light path between described micro projector and described concave mirror, and the light path between described fly's-eye lens and described concave mirror is less than the focal length of described concave mirror.
3. new line digital display system according to claim 2, is characterized in that, in the light path between described fly's-eye lens and concave mirror, is provided with the first reflecting part.
4. new line digital display system according to claim 3, is characterized in that, is provided with a transparent sealing sheet material in described projection exit, with by airtight for described projection outlet, prevents dust from entering in housing.
5. new line digital display system according to claim 4, is characterized in that, described micro projector, fly's-eye lens, the first reflecting part, concave mirror etc. are all installed in housing, in integrative-structure; Described integrative-structure is installed in the pockets on fascia.
6. new line digital display system according to claim 3, is characterized in that, the light path between described fly's-eye lens and micro projector is provided with the second reflecting part.
7. new line digital display system according to claim 1, is characterized in that, also comprises highly reflecting films, and described highly reflecting films are attached to front windshield inner surface of automobile, to reflect the light from described projection outlet injection.
8. new line digital display system according to claim 2, is characterized in that, the radius of the lenslet on described fly's-eye lens is 0.01-0.05mm.
9. new line digital display system according to claim 1, is characterized in that, in described housing, miniature thermal component is also housed.
10. new line digital display system according to claim 4, is characterized in that, described transparent sealing sheet material is the arc shape of indent, and its thickness is 0.3-0.5mm.
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