CN104267498A - Head up display system - Google Patents
Head up display system Download PDFInfo
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- CN104267498A CN104267498A CN201410540045.8A CN201410540045A CN104267498A CN 104267498 A CN104267498 A CN 104267498A CN 201410540045 A CN201410540045 A CN 201410540045A CN 104267498 A CN104267498 A CN 104267498A
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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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
- B32B17/10201—Dielectric coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
- B32B17/1044—Invariable transmission
- B32B17/10458—Polarization selective transmission
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/418—Refractive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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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
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
- G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
-
- 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
- G02B2027/0192—Supplementary details
- G02B2027/0194—Supplementary details with combiner of laminated type, for optical or mechanical aspects
Abstract
The invention relates to the technical field of head up display, in particular to a head up display system on an automobile. The head up display system comprises a projection light source, laminated glass and a transparent nanometer film, wherein the transparent nanometer film comprises at least one laminated structure of high reflective index layers/low reflective index layers which sediment sequentially outwards from the surface of an inner glass board; the projection light source is used for generating P polarized light, the P polarized light enters the transparent nanometer film, the reflectivity of the P polarized light from the transparent nanometer film is not lower than 5%, and the incident angle of the P polarized light ranges from 42 degrees to 72 degrees. Only a reflection image of the transparent nanometer film can be observed when a reflection image on the laminated glass is observed visually, a reflection image of an uncoated surface can be neglected, and therefore the ghosting problem of the reflection image of the head up display system is avoided; by means of the head up display system, application and popularization of an HUD technology are facilitated, the safe driving environment is provided, the overall structure and process are simple, the cost is low, and the head up display system is safe, durable, attractive and elegant.
Description
Technical field:
The present invention relates to new line display technique field, particularly relate to the head-up-display system on a kind of automobile.
Background technology:
Along with the development of science and technology, display (HUD, the Head Up Display) system that comes back is used more and more on automobile.Head-up-display system on automobile can by important running information, such as the information of speed, engine revolution, oil consumption, tire pressure, navigation and external smart machine is presented in the visual field of driver on front windshield in real time, driver is made to bow like this, just can see running information, thus avoid disperseing the notice to road ahead; Make driver need not regulate eyes between the observation road in a distant place and instrument nearby simultaneously, the fatigue of eyes can be avoided, greatly can strengthen traffic safety and improve driving experience.
The realization of current new line display technique is mainly through luminescence imaging and projection imaging two kinds of modes, wherein projection imaging utilizes shield glass itself or the extra optical element arranged to carry out Projection Display, and to adopt front windshield to carry out reflective projection image be the simplest mode of structure.General front windshield is laminated glass, it is made up of sandwiched thermoplastic polymer film sheet (as polyvinyl butyral and PVB) in the middle of the glass substrate that at least two panels has a certain curvature, can reflect when the light that the projection light source of head-up-display system sends two of contacting with air through laminated glass are surperficial, reflected image on two surfaces can produce skew thus form two ghost images mutually disturbed, particularly can be more obvious when the thickness of laminated glass thicker (generally more than 3mm), this greatly limits the sharpness of projection-display image.
For solving the ghost problems of head-up-display system on shield glass, in prior art, there is some schemes.Such as patent CN101038349 (A), US2002172804 (A1) and US2007148472 (A1) a solution disclosed wherein adopt the polymer membrane of wedge shape as the middle layer of laminated glass, the upper and lower thickness of laminated glass is made to be wedge shape change, thus the reflected image on make driver see two surfaces overlaps substantially, finally eliminates ghost problems significantly.With technique scheme similar be that local adopts the glass substrate of wedge thickness, it discloses in patent US6414796 (B1).But these technical schemes exist following shortcoming: 1, fail thoroughly to eliminate ghost image, be not suitable for high-definition image display; 2, need the pvb film adopting special requirement, its price is 7 ~ 10 times of common pvb film, and technology difficulty is high, makes materials and process cost very high; 3, responsive to the optical design of vehicle, need redesign for the front windshield of concrete vehicle.
A solution is also had to be at the surface of laminated glass or the middle optical functional layer that can change direction of polarized light or can the reflective polarizer of reflected P polarized light or S polarized light of arranging, and the P polarized light sent in conjunction with the projection light source of head-up-display system or S polarized light incident with special angle (as Brewster angle), thus utilize laminated glass to the reflection characteristic of different polarization light to eliminate the reflected image on certain surface as far as possible, finally eliminate ghost image.This technical scheme is at EP0836108 (A2), EP0844507 (A1), US6327089 (B1), CN1969219 (A), US7355796 (B2), CN101151568 (A), US7839574 (B2), all have open in the patents such as CN1732404 (A) and CN102256910 (A), but the prerequisite that this technical scheme realizes must set up extra optical functional layer or reflective polarizer the local of laminated glass (namely come back display view field), this just must improve material cost and technology difficulty, the multiple layer polymer P polarizing mirror number of plies such as, disclosed in CN1732404 (A) is up to tens of extremely hundreds of layer, the overall homogeneity of front windshield is also destroyed simultaneously, reduces aesthetics, in addition, cohesive strength laminated glass locally being arranged the region of optical functional layer or reflective polarizer may reduce thus cause potential safety hazard, and the visible light transmissivity of partial optical functional layer or reflective polarizer is on the low side, thus the visual field of driver or the outward appearance of front windshield are had an impact.
In addition, also exist in prior art by setting up the brightness that antireflection (AR) film reduces the reflected image that one of them interface is formed on the surface at laminated glass, such as, in patent US7864431 (B2), disclose the technical scheme being arranged on by antireflecting film on surface that laminated glass contacts with air or setting up Low emissivity (Low-E) plated film on the surface that antireflecting film is not set.But there is following shortcoming in this technical scheme: 1, antireflecting film is deposited on the surface that laminated glass contacts with air, particularly be deposited on laminated glass on the surface outside car time, it is difficult to bear severe environment for use, the friction of such as acid rain, dust, wiper or alkaline cleaner etc.; 2, antireflecting film is difficult to eliminate ghost image completely, particularly still exists light blue or lilac reflective when high angle is observed; 3, be deposited on laminated glass and can cover water membrane when the antireflecting film on the surface outside car runs into rainy day, now anti-reflective effect can significantly reduce, and finally causes ghost phenomena serious; 4, antireflecting film is arranged on the surface that laminated glass contacts with air, can not eliminate the reflected image produced on the low-emission coated interface set up, or there is ghost phenomena to a certain degree.
Similarly, also macroscopic ghost phenomena can be reduced by the mode strengthening the reflected light formed on the surface that laminated glass contacts with air, such as, on component market common adhesive film type HUD projector, it pastes semi-transparent reflective film in advance in HUD view field.Obviously, this technical scheme destroys the overall homogeneity of shield glass or the permeability of outward appearance on the one hand, does not also fundamentally eliminate ghost phenomena on the other hand.
In automobile head-up-display system, except above-mentioned ghost problems must be resolved, also need to enable show image have multicolor displaying ability as much as possible, to meet the display of multiple different frame.Such as Chinese patent CN2694293 (Y) has the narrow wavelength reflection bands of red, green, blue three primary colours by the rete being coated with plural layer different refractivity on base material to realize HUD.In reality, if full-color display requirement can not meet, then need to ensure as far as possible the green reflection that human eye is the most responsive.
Summary of the invention:
Technical matters to be solved by this invention is the shortcoming existed for above-mentioned prior art, provide a kind of can the clear head-up-display system simple and with low cost without ghost image, multicolor displaying, structural manufacturing process.
The present invention solves the technical scheme that its technical matters takes: a kind of head-up-display system, comprise projection light source and laminated glass, described laminated glass comprises interior glass plate, outer glass plate and the middle diaphragm be clipped between interior glass plate and outer glass plate, it is characterized in that: also comprise transparent nano film, described transparent nano film is deposited on the surface of interior glass plate farthest away from middle diaphragm, described transparent nano film comprises the rhythmo structure of the high index layer/low index layer that at least one outwards deposits successively from interior glass pane surface, the refractive index of described high refractive index layer is not less than 1.8, the refractive index of described low-index layer is not higher than 1.6, the refringence of described interior glass plate and outer glass plate and described middle diaphragm is not more than 0.1, described projection light source is for generation of P polarized light, and P polarized light incides on described transparent nano film, and described transparent nano film is not less than 5% to described P polarization light reflectance, and the incident angle of described P polarized light is 42 ~ 72 degree.
Further, described high refractive index layer is selected from oxide of Zn, Sn, Ti, Nb, Zr, Ni, In, Al, Ce, W, Mo, Sb, Bi element and composition thereof, or at least one in the nitride of Si, Al, Zr, Y, Ce, La element, oxides of nitrogen and composition thereof.
Further, described low-index layer is selected from SiO
2, Al
2o
3and composition thereof at least one.
Further, the incident angle of described P polarized light is 55 ~ 70 degree.
Further, the refringence of described interior glass plate and outer glass plate and described middle diaphragm is not more than 0.05.
Further, described transparent nano film to described P polarization light reflectance higher than 10%.
Further, described transparent nano film comprises the rhythmo structure of a high index layer/low index layer, and wherein the geometric thickness of high refractive index layer is 50 ~ 100nm, and the geometric thickness of low-index layer is 80 ~ 120nm.
Further, described transparent nano film comprises the rhythmo structure of two high index layer/low index layer, namely the first high refractive index layer, the first low-index layer, the second high refractive index layer and the second low-index layer is outwards deposited successively from interior glass pane surface, the geometric thickness of the first high refractive index layer is 5 ~ 35nm, the geometric thickness of the first low-index layer is 5 ~ 35nm, the geometric thickness of the second high refractive index layer is 20 ~ 50nm, and the geometric thickness of the second low-index layer is 80 ~ 130nm.
Further, in the rhythmo structure of described high index layer/low index layer, high refractive index layer or low-index layer also comprise multiple sublayer.
Further, in high refractive index layer near the refractive index of the sublayer of interior glass lower than the refractive index of the sublayer away from interior glass.
The present invention is owing to taking technique scheme, and it has following beneficial effect:
Head-up-display system of the present invention, P polarized light is utilized to be incident on the characteristic that reflectivity in glass and Air Interface is lower and transparent nano film is higher to P polarization light reflectance, make the reflection image only observing transparent nano film during the catoptric imaging on visualization laminated glass, the reflection image of non-coated surface can be ignored, and thereby eliminates the ghost problems of the reflected image of head-up-display system; Meanwhile, the present invention is conducive to the popularization and application of HUD technology compared to the optical element of wedge shape pvb film or additional, thus provides safe environment, one-piece construction of the present invention and technique simple, with low cost, and safe, durable and elegant in appearance.
Accompanying drawing illustrates:
Fig. 1 is the partial sectional view of head-up-display system of the present invention;
Fig. 2 A is the schematic diagram that transparent nano film of the present invention comprises the rhythmo structure of a high index layer/low index layer;
Fig. 2 B is the schematic diagram that transparent nano film of the present invention comprises the rhythmo structure of two high index layer/low index layer;
Fig. 3 is the schematic diagram that high refractive index layer in transparent nano film of the present invention comprises two sublayers;
Fig. 4 is the reflectance spectrum of the incident transparent nano film of P polarized light of the present invention and non-plated membrane interface;
Fig. 5 A, 5B are that P polarized light of the present invention is respectively with new line display image during 57 degree, 66 degree incidence;
Fig. 5 C is the display image of the head-up-display system of common laminated glass.
Embodiment:
Below in conjunction with accompanying drawing, content of the present invention is described further.
As shown in Figure 1, head-up-display system of the present invention comprises projection light source 1 and laminated glass 2, the middle diaphragm 22 that described laminated glass 2 comprises interior glass plate 21, outer glass plate 23 and is clipped between interior glass plate 21 and outer glass plate 23, in order to eliminate ghost phenomena, described head-up-display system also comprises transparent nano film 3, and described transparent nano film 3 is deposited on interior glass plate 21 farthest away from the surface 211 i.e. first surface 211 of middle diaphragm 22; Described projection light source 1 incides on described transparent nano film 3 for generation of P polarized light 11, P polarized light 11, and the reflectivity of described transparent nano film 3 to described P polarized light 11 is not less than 5%, and the incident angle of described P polarized light 11 is 42 ~ 72 degree.When the present invention utilizes P polarized light incident with the angle of 42 ~ 72 degree, the characteristic that reflectivity is lower and transparent nano film is higher to P polarization light reflectance on glass and Air Interface, make the reflection image only observing transparent nano film during the catoptric imaging on visualization laminated glass, thus eliminate visual ghost phenomena; Meanwhile, described transparent nano film 3 being deposited directly on the inside surface 211 of interior glass plate 21, without the need to changing original laminated safety glass structure, one-piece construction and technique can being made simply like this, with low cost; And in order to eliminate the impact of laminated glass 2 inside on the P polarized light 11 of incidence, preferred described interior glass plate 21 and outer glass plate 22 are not more than 0.1 with the refringence of described middle diaphragm 23.
Wherein, described transparent nano film 3 comprises the rhythmo structure of the high index layer/low index layer that at least one outwards deposits successively from interior glass plate 21 surface 211, the refractive index of described high refractive index layer is not less than 1.8, preferably higher than 2.0, more preferably higher than 2.2, further, described high refractive index layer is selected from Zn, Sn, Ti, Nb, Zr, Ni, In, Al, Ce, W, Mo, Sb, oxide of Bi element and composition thereof, or Si, Al, Zr, Y, Ce, the nitride of La element, at least one in oxides of nitrogen and composition thereof, can be TiOx particularly, NbOx, HfO
2, TaOx, MoOx, ZrOx, CeO
2, WO
3, BiOx or SiZrNx etc., the refractive index of described low-index layer, not higher than 1.6, is preferably lower than 1.5, and further, described low-index layer is selected from SiO
2, Al
2o
3and composition thereof at least one, can be SiAlOx particularly, wherein Si/Al atomic ratio be higher than 10.In fig. 2, described transparent nano film 3 comprises the rhythmo structure of a high index layer/low index layer, and the geometric thickness of high refractive index layer 31 is preferably 50 ~ 100nm, and the geometric thickness of low-index layer 32 is preferably 80 ~ 120nm; And in fig. 2b, described transparent nano film 3 comprises the rhythmo structure of two high index layer/low index layer, namely outwards the first high refractive index layer 301, first low-index layer 302, second high refractive index layer 303 and the second low-index layer 304 is deposited successively from interior glass plate 21 surface 211, the geometric thickness of the first high refractive index layer 301 is preferably 5 ~ 35nm, the geometric thickness of the first low-index layer 302 is preferably 5 ~ 35nm, the geometric thickness of the second high refractive index layer 303 is preferably 20 ~ 50nm, and the geometric thickness of the second low-index layer 304 is preferably 80 ~ 130nm; Pass through film material and the thicknesses of layers of reasonable design high refractive index layer and low-index layer like this, outstanding machinery, chemistry and thermal stability can be made it have, ensure that IMAGE.Certainly, the present invention according to actual needs, can also arrange the rhythmo structure of more high index layer/low index layer, and is correspondingly optimized setting according to the P polarization light reflectance of sandwiched product with other optical index.
Alternatively, in the rhythmo structure of described high index layer/low index layer, high refractive index layer or low-index layer also can comprise multiple sublayer further; As shown in Figure 3, high refractive index layer 31 comprises the first sublayer 311 and the second sublayer 312; And preferably, in high refractive index layer near the sublayer i.e. refractive index of the first sublayer 311 of interior glass 21 lower than the sublayer away from the interior glass 21 i.e. refractive index of the second sublayer 312.
In FIG, the P polarized light 11 of projection light source 1 generation is with 57 degree of (Brewster angle θ
b) incide on described transparent nano film 3, because described transparent nano film 3 comprises the rhythmo structure of the high index layer/low index layer that at least one outwards deposits successively from interior glass plate 21 surface 211, so directly the first reflected light 12 can be formed by reflecting part P polarized light 11, first reflected light 12 directly can enter the eyes of observer 100, forms display (HUD) the main picture that comes back, due to the very thin thickness of described transparent nano film 3, so also substantially constant through the direction of propagation of the part P polarized light 11 of described transparent nano film 3, and enter formation first refractive light 13 in laminated glass 2, inner at laminated glass 2, it is that their refractive index is very close that refringence due to middle diaphragm 22 and described interior glass plate 21 and outer glass plate 23 is not more than 0.1, so first refractive light 13 does not occur to reflect on the surface that middle diaphragm 22 contacts with interior glass plate 21 or outer glass plate 23 and the direction of propagation is substantially constant, until first refractive light 13 arrives on outer glass plate 23 away from the surface 231 of middle diaphragm 22 i.e. second surface 231, the namely surface that contacts with air of outer glass plate 23, according to the reflection characteristic of P polarized light near Brewster angle and the reversibility of light transmition, the intensity of the second reflected light 15 that first refractive light 13 is formed on second surface 231 is 0 or quite faint, and produce the second refract light 14 entered in air, even if when there is the second faint reflected light 15, it also will again through reflection and the refraction of first surface 211 and described transparent nano film 3, final fainter from the third reflect light 16 of described transparent nano film 3 outgoing, thus form fainter ghost image, in certain background luminance, main picture/ghost image brightness ratio situation, observer 100 is difficult to the existence discovering ghost image, and new line display (HUD) clear picture now, without visual ghost image, has good display effect.
Wherein, described projection light source 1 is connected and exports related text, image information such as speed, engine revolution, oil consumption, tire pressure, navigation, night vision in the mode of P polarized light 11 and wait until on laminated glass 2 as the pertinent instruments instrument of display and the automobile of the information such as word, image, external sensor or external smart machine etc., thus arrive observed by the observer 100 in car.Described projection light source 1 is element well known by persons skilled in the art, includes but not limited to laser, light emitting diode (LED), LCDs (LCD), electroluminescence (EL), cathode-ray tube (CRT) (CRT), vacuum fluorescent display（VFD） (VFD), collimating mirror, spherical correction mirror, convex lens, concavees lens, catoptron and/or polariscope etc.Meanwhile, the position of projection light source 1 and incident angle are adjustable, with diverse location in applicable car or observer 100 highly.
Wherein, described laminated glass 2 comprises interior glass plate 21, outer glass plate 23 and the middle diaphragm 22 be clipped between interior glass plate 21 and outer glass plate 23, described interior glass plate 21 is towards automotive interior, described outer glass plate 23 is towards automobile external, described middle diaphragm 22 is thermoplastic polymer film sheet, in order to reduce middle diaphragm 22 to the impact of first refractive light 13, the refractive index close of the refractive index of this middle diaphragm 22 and glass i.e. middle diaphragm 22 is selected to be not more than 0.1 with the refringence of described interior glass plate 21 and outer glass plate 23, more preferably, diaphragm 22 is not more than 0.05 with the refringence of described interior glass plate 21 and outer glass plate 23, the pvb film such as often used.Laminated glass 2 shown in Fig. 1 is convenient so be depicted as straight in order to map, but laminated glass 2 is bending in practical application, be understandable that, bending laminated glass 2 is scheme preferred for this invention, but be not limited thereto, other transparent component, such as monolithic or more sheet lamination, straight or bending (curvature is homogeneous or change), all alternative described laminated glass 2 of transparent component colourless or dyeing, that be made up of simple glass and/or plastics.
Wherein, P polarized light 11 of the present invention is with 57 degree of (Brewster angle θ
b) incide on described transparent nano film 3 from air, due to the very thin thickness of transparent nano film 3, so P polarized light 11 is equivalent to also with Brewster angle θ
bincide away from the surface 211 of middle diaphragm 23 i.e. first surface 211 on interior glass plate 21, and do not occur on first surface 211 reflection or reflection strength very weak, Brewster angle θ mentioned here
brelevant with the refractive index of concrete optical material, in the present invention for the general material for shield glass, described Brewster angle θ
bbe about 57 degree.More strictly speaking, described Brewster angle θ
balso relevant with the wavelength of P polarized light, but this impact is in the present invention general very little, in the ordinary course of things, can by described Brewster angle θ in visible wavelength (380 ~ 780nm) scope
bbe considered as constant.As shown in Figure 5A, the incident angle of P polarized light is Brewster angle 57 degree, and in head-up-display system of the present invention, HUD image (velocity information) is clear without ghost image.Meanwhile, in the projection imaging process of reality, due to the size relationship of light source and the projection virtual image, and the factor such as the mounting structure of windshield, light source position, the incident angle of P polarized light may with Brewster angle θ
bhave and depart from, but deviation angle is generally within 15 degree, such as 42 ~ 72 degree, preferably 55 ~ 70 degree, can be 55 ~ 64 degree further, be more preferably 56 ~ 59 degree, in this case, although the reflected light come from second surface 231 can not be eliminated completely, and the reflected light phase specific strength that transparent nano film 3 produces is still quite low; As shown in Figure 5 B, the incident angle of P polarized light is for departing from Brewster angle 9 degree, namely incident angle is 66 degree, now ghost image reflection image is enough low relative to principal reflection image brightness, ghost image reflection image is rendered as principal reflection and swoons as the comparatively low light level on side, in fact human eye is difficult to the existence feeling ghost image, therefore visual still without ghost image.Compare with Fig. 5 B with Fig. 5 A, Fig. 5 C is then new line display (HUD) image of common laminated glass, the brightness of its ghost image reflection image and principal reflection picture is almost close, can find out the existence of ghost image apparently, and practical effect is obviously not as Fig. 5 A in the present invention and Fig. 5 B.
In the present invention, in order to obtain display (HUD) the main picture that comes back clearly, preferred described transparent nano film 3 is not less than 5%, more preferably higher than 10% to described P polarization light reflectance; Such as described transparent nano film 3 comprises the rhythmo structure of a TiO2 65.6nm/SiO2 102nm, reflectance spectrum when transparent nano film 3 pairs of P polarized lights are incident with the angle of 66 degree is as shown in A1 in Fig. 4, its reflectivity is up to 20.27%, and correspondence from non-plated membrane interface if the reflectance spectrum of first surface 211 is as shown in B1 in Fig. 4, its reflectivity only has 0.62%, and the reflectivity of the former transparent nano film 3 is 33 times of the latter as seen; Equally, such as described transparent nano film 3 comprises the rhythmo structure of two TiO2/SiO2, concrete rhythmo structure is: interior glass/TiO2 16.2nm/SiO2 18.5nm/TiO2 30.5nm/SiO2 111.7nm, reflectance spectrum when transparent nano film 3 pairs of P polarized lights are incident with the angle of 66 degree is as shown in A2 in Fig. 4, its reflectivity is 14.59%, and correspondence from non-plated membrane interface if the reflectance spectrum of first surface 211 is as shown in B2 in Fig. 4, its reflectivity only has 0.58%, and the reflectivity of the former transparent nano film 3 is 25 times of the latter as seen.Transparent nano film 3 of the present invention is to the reflectivity of the P polarization light reflectance of incidence far above non-plated membrane interface (such as laminated glass surface), and this is favourable for the visual HUD image without ghost image of acquisition.
In order to illustrate in greater detail and support inventive point of the present invention with having more cogency, now enumerate some embodiments and be described in detail.
Embodiment 1 ~ 3 and comparative example 1
With Fu Yao group produce thickness be that the sodium-calcium-silicate float glass of 2.1 millimeters is for substrate, through cutting, edging, after the operations such as washing and oven dry, enter magnetron sputtering plating line and carry out coated film deposition, on substrate, alternating deposit is as the transparent nano film rete in table 1, after rete deposition terminates, with Fu Yao group produce thickness be that the sodium-calcium-silicate float glass of 2.1 millimeters is for joining sheet, shaping according to vehicle glass high temperature molding processes, the colourless PVB film of a slice 0.76 mm of thickness in therebetween again, sheet is closed again at autoclave mesohigh, even also after other processing examples are as annex installation, make the laminated glass depositing transparent nano film, design parameter is in table 1.
Wherein, embodiment 1 comprises the rhythmo structure of a high index layer/low index layer for transparent nano film, embodiment 2 comprises the rhythmo structure of two high index layer/low index layer for transparent nano film, and embodiment 3 is the situation that high refractive index layer in transparent nano film comprises two sublayers; Comparative example 1 is the ordinary flat laminated glass without plated film, and its structure is press from both sides the colourless PVB film of last layer 0.76 millimeter between two panels 2.1 millimeters of float glasses; Except coated film deposition, all the other technological processs are the same.
Projection light source in the head-up-display system of embodiment 1 ~ 3 and comparative example 1 is the TFT-LCD projector of LED-backlit, wherein also comprise multiple catoptron, the display image regulating the angle incident direction of projector position and emergent light that observer is observed reaches the most clear.When carrying out imaging with comparative example glass, between projector and glass, additional a slice resin half-wave plate makes polarization direction become S polarization for improving brightness of image, keeps P polarized light incident in embodiment 1 ~ 3.
Table 1: the head-up-display system that embodiment 1 ~ 3 and comparative example 1 are formed
Polarized light projection light source produced in the head-up-display system that embodiment 1 ~ 3 and comparative example 1 are formed is incident with different angles, and image quality illustrates all in table 2.
Table 2: the image quality of the head-up-display system that embodiment 1 ~ 3 is formed
As can be seen here, the head-up-display system formed in embodiment 1 ~ 3 can P polarized light respectively with 57 degree, 66 degree even 72 degree of incidence time show image and all can reach visual without ghost image, thus wedge shape pvb film or additional optical element can not be adopted just can to eliminate or alleviate ghost phenomena, make one-piece construction and technique simple, with low cost, and safe, durable and elegant in appearance.
More than the present invention cited embodiment is all describing the structure composition of head-up-display system; and all do not describe as the concrete manufacture craft of concrete rete depositing operation, parameter and laminated glass articles and parameter; be understandable that the part that these do not describe is all well known to those of ordinary skill in the art, therefore the part do not described does not affect invention which is intended to be protected.
Above content specifically describes head-up-display system of the present invention; and list multiple embodiment to be described; but the present invention is not subject to the limitation of embodiment content described above and corresponding embodiment; the any improvement carried out according to technical essential of the present invention so all, equivalent modifications and replacement etc., all belong to the scope of protection of the invention.
Claims (10)
1. a head-up-display system, comprise projection light source and laminated glass, described laminated glass comprises interior glass plate, outer glass plate and the middle diaphragm be clipped between interior glass plate and outer glass plate, it is characterized in that: also comprise transparent nano film, described transparent nano film is deposited on the surface of interior glass plate farthest away from middle diaphragm, described transparent nano film comprises the rhythmo structure of the high index layer/low index layer that at least one outwards deposits successively from interior glass pane surface, the refractive index of described high refractive index layer is not less than 1.8, the refractive index of described low-index layer is not higher than 1.6, the refringence of described interior glass plate and outer glass plate and described middle diaphragm is not more than 0.1, described projection light source is for generation of P polarized light, and P polarized light incides on described transparent nano film, and described transparent nano film is not less than 5% to described P polarization light reflectance, and the incident angle of described P polarized light is 42 ~ 72 degree.
2. head-up-display system according to claim 1, it is characterized in that: described high refractive index layer is selected from oxide of Zn, Sn, Ti, Nb, Zr, Ni, In, Al, Ce, W, Mo, Sb, Bi element and composition thereof, or at least one in the nitride of Si, Al, Zr, Y, Ce, La element, oxides of nitrogen and composition thereof.
3. head-up-display system according to claim 1, is characterized in that: described low-index layer is selected from SiO
2, Al
2o
3and composition thereof at least one.
4. head-up-display system according to claim 1, is characterized in that: the incident angle of described P polarized light is 55 ~ 70 degree.
5. head-up-display system according to claim 1, is characterized in that: the refringence of described interior glass plate and outer glass plate and described middle diaphragm is not more than 0.05.
6. head-up-display system according to claim 1, is characterized in that: described transparent nano film to described P polarization light reflectance higher than 10%.
7. head-up-display system according to claim 1, it is characterized in that: described transparent nano film comprises the rhythmo structure of a high index layer/low index layer, wherein the geometric thickness of high refractive index layer is 50 ~ 100nm, and the geometric thickness of low-index layer is 80 ~ 120nm.
8. head-up-display system according to claim 1, it is characterized in that: described transparent nano film comprises the rhythmo structure of two high index layer/low index layer, namely the first high refractive index layer, the first low-index layer, the second high refractive index layer and the second low-index layer is outwards deposited successively from interior glass pane surface, the geometric thickness of the first high refractive index layer is 5 ~ 35nm, the geometric thickness of the first low-index layer is 5 ~ 35nm, the geometric thickness of the second high refractive index layer is 20 ~ 50nm, and the geometric thickness of the second low-index layer is 80 ~ 130nm.
9. head-up-display system according to claim 1, is characterized in that: in the rhythmo structure of described high index layer/low index layer, and high refractive index layer or low-index layer also comprise multiple sublayer.
10. head-up-display system according to claim 9, is characterized in that: near the refractive index of the refractive index of the sublayer of interior glass lower than the sublayer away from interior glass in high refractive index layer.
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