CN115561905A - Head-up display system - Google Patents
Head-up display system Download PDFInfo
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- CN115561905A CN115561905A CN202211292336.0A CN202211292336A CN115561905A CN 115561905 A CN115561905 A CN 115561905A CN 202211292336 A CN202211292336 A CN 202211292336A CN 115561905 A CN115561905 A CN 115561905A
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- display
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- windshield
- light rays
- incident light
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels
- G02B30/52—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels the 3D volume being constructed from a stack or sequence of 2D planes, e.g. depth sampling systems
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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
- G02B2027/0132—Head-up displays characterised by optical features comprising binocular systems
- G02B2027/0134—Head-up displays characterised by optical features comprising binocular systems of stereoscopic type
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a head-up display system, which comprises: a windshield; the projection unit is used for emitting a plurality of parallel incident rays corresponding to the same projection image to the windshield, and the incident rays have different optical path lengths; the incident light rays are reflected inside the windshield to form a plurality of parallel emergent light rays; a plurality of virtual images that show the distance difference are formed to a plurality of emergent rays in user's field of vision, a plurality of virtual images superpose for the projection image that has 3D stereoeffect. According to the invention, a plurality of single-layer projection images with different display distances are superposed into a 3D image, so that the driving experience of a user can be improved.
Description
Technical Field
The present invention relates to a head-up display system.
Background
The head-up display system is widely applied to aircrafts and spacecrafts, gradually permeates into the fields of automobiles, ships and the like, projects images onto a windshield through a projection unit, and light enters the visual field of a user after being reflected by the windshield, so that the user can see projected images of superposed external scenes. In the head-up display system based on the reflection projection principle, the projection image is a 2D plane image and cannot be attached to a 3D external scene, the eye focus point of a driver needs to be repeatedly switched between the 2D projection image and the 3D external scene, and adverse reactions such as fatigue, dizziness, nausea and the like are easily generated, so that the driving safety is influenced.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a head-up display system capable of providing 3D (three-dimensional) projection images for a user.
The technical scheme is as follows: the present invention provides a head-up display system, comprising:
a windshield;
the projection unit is used for emitting a plurality of parallel incident rays corresponding to the same projection image to the windshield, and the incident rays have different optical path lengths; the incident light rays are reflected inside the windshield to form a plurality of outgoing light rays which are parallel to each other;
a plurality of emergent rays form a plurality of virtual images that show the distance difference in user's field of vision, a plurality of virtual images superpose for the projection image that has the 3D stereoeffect.
According to the invention, a plurality of single-layer projection images with different display distances are superposed to form the 3D stereo image, and the 3D stereo image can be better fused with the 3D external scene, so that the driving experience of a user can be improved, and the driving safety is guaranteed.
Further, the projection unit includes:
the bottom display is horizontally arranged, and a horizontal semi-reflecting and semi-permeable membrane which is parallel to the bottom display is arranged above the bottom display;
the left display and the right display in pair are arranged in parallel and oppositely and are vertically arranged above the bottom display, and an inclined semi-reflecting and semi-transmitting film is arranged between the left display and the right display in pair, and the inclination angle is 45 degrees;
projected light rays emitted by the bottom display form incident light rays entering the windshield after passing through the horizontal semi-reflecting and semi-permeable film; the projected light emitted by the left display is reflected by the inclined semi-reflecting and semi-transmitting film to form incident light entering the windshield; and the projected light emitted by the right display is reflected by the inclined semi-reflecting and semi-transmitting film and the horizontal semi-reflecting and semi-transmitting film in sequence to form incident light of the incident windshield.
Furthermore, the left display and the right display are in multiple pairs, and the multiple pairs of the left display and the right display are sequentially arranged above the bottom display from bottom to top. When the left display and the right display are in multiple pairs, more projection images with different display distances can be formed, and the stereoscopic impression of the 3D projection image is stronger.
Further, the number of the bottom displays is multiple, and the bottom displays are arranged at intervals between the left display and the right display in the pair below the horizontal semi-reflecting and semi-permeable membrane. Because windshield is the slope, when a plurality of bottom display levels interval set up, the incident ray that each bottom display sent also has different light path length to this technical scheme can obtain better 3D stereoeffect.
Further, the bottom display, the horizontal transflective film, the inclined transflective film, the left display and the right display are mounted in a projection unit housing.
Further, windshield includes inlayer glass, image amplifier, PVB intermediate layer and the outer glass that sets gradually, and image amplifier includes positive fresnel lens, burden fresnel lens and is located the anti-pellicle of the first half between positive, the burden fresnel lens, and wherein positive fresnel lens and inlayer glass laminating, burden fresnel lens and PVB intermediate layer laminating. This technical scheme gets rid of the free form surface mirror that plays the image amplification effect on the display among the projection unit now, with the integrated windshield of magnifying function on, can reduce projection unit's volume like this, reduces projection unit's weight, is favorable to promoting projection unit in the internal spatial arrangement flexibility of car.
Further, most of the reflected light from the windshield is S light, and the S light cannot be transmitted by normal polarized sunglasses, so that the projected image cannot be seen when the polarized sunglasses are worn. Therefore, in the technical scheme, the projection light emitted by each display is P-type linearly polarized light. Thus, the light reflected from the image amplifier in the windshield is P-type linearly polarized light, and the projection image can be viewed by wearing polarized sunglasses.
Further, in the windshield glass formed by the inner layer glass, the outer layer glass and the PVB interlayer in the prior art, light emitted by the projection unit can be reflected by the inner layer glass and the outer layer glass simultaneously, and double images are formed. In the technical scheme, the incident angle of the plurality of incident rays and the inner layer glass is set to be a Brewster angle. When the P-type linearly polarized light emitted by the projection unit enters the inner layer glass and the outer layer glass at the Brewster angle, the reflection does not occur any more, and the reflection only occurs on the surface of the image amplifier, so that only one reflected image is provided, and the effect of projection display without double images can be achieved.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: a 3D stereoscopic projection image can be provided to the user.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention are briefly described below, and it is obvious that the drawings described below are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a head-up display system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another projection unit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an image amplifier according to an embodiment of the present invention;
reference numerals are as follows:
the projection unit 100, the bottom display 110, the horizontal transflective film 150, a first incident ray 113, a first refracted ray 114, a first reflected ray 115, a first emergent ray 116, a first reverse extension line 117, and a first virtual image 118; a first left display 120, a first inclined transflective film 140, a second projected light ray 121, a second incident light ray 123, a second refracted light ray 124, a second reflected light ray 125, a second emergent light ray 126, a second reverse extension line 127, and a second virtual image 128; a first right display 130, a third projected light ray 131, a third reflected light ray 132, a third incident light ray 133, a third refracted light ray 134, a fourth reflected light ray 135, a third outgoing light ray 136, a third reverse extension line 137, and a third virtual image 138; a projection unit housing 160, a second left display 170, a second tilted transflective film 141, a fourth projection ray 171, a fourth incident ray 173; a second right display 180, a fifth projected light ray 181, a fifth reflected light ray 182, a fifth incident light ray 183;
the user field of view 300.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a head-up display system according to an embodiment of the present disclosure, where the head-up display system includes a projection unit 100 and a windshield 200.
The windshield 200 comprises an inner layer of glass 210, an image amplifier 240, a PVB interlayer 230 and an outer layer of glass 220 which are arranged in sequence, and in combination with fig. 3, the image amplifier 240 comprises a positive fresnel lens 241, a negative fresnel lens 242 and a first semi-transparent film 243 between the positive fresnel lens and the negative fresnel lens, wherein the positive fresnel lens 241 is attached to the inner layer of glass 210, and the negative fresnel lens 242 is attached to the PVB interlayer 230. The image amplifier 240 has no amplification effect on light incident from the side of the negative fresnel lens 242, and has an amplification effect on light incident from the side of the positive fresnel lens 241. Specifically, when the user views on the positive fresnel lens 240 side, the image magnifier 240 has no magnifying effect on the eighth incident light ray 248 incident from the negative fresnel lens 242 side, and has a magnifying effect on the sixth incident light ray 246 and the seventh incident light ray 247 incident from the positive fresnel lens 241 side.
The projection unit 100 includes a bottom display 110, a first left display 120, a first right display 130, a first tilted transflective film 140, and a horizontal transflective film 150, wherein the bottom display 110 is horizontally disposed and the horizontal transflective film 150 is disposed above the bottom display 110 and parallel to the bottom display 110. The first left display 120 is vertically disposed on the left side above the bottom display 110, the first right display 130 is vertically disposed on the right side above the bottom display 110, and the first left display 120 and the first right display 130 are parallel and are in a positive-phase opposition. A first inclined transflective film 140 is disposed between the first left display 120 and the first right display 130, and an inclination angle of the first inclined transflective film 140 is 45 °, that is, an included angle formed between the first inclined transflective film 140 and the first left display 120 and the first right display 130 is 45 °.
The first projected light corresponding to the projected image from the bottom display 110 passes through the horizontal transflective film 150 to form a first incident light 113 incident on the windshield 200. The first incident light 113 is refracted at the inner layer glass 210 to form a first refracted light 114, the first refracted light 114 is reflected at the image magnifier 240 to form a first reflected light 115, the first reflected light 115 is refracted at the inner layer glass 210 to form a first emergent light 116, the first emergent light 116 enters the user visual field 300, and a first virtual image 118 corresponding to the projected image is formed on a first reverse extension line 117 of the first emergent light 116.
The second projected light 121 emitted by the first left display 120 and corresponding to the projected image is reflected by the first tilted transflective film 140 to form a second incident light 123 incident on the windshield 200. The second incident light 123 is refracted at the inner layer glass 210 to form a second refracted light 124, the second refracted light 124 is reflected at the image amplifier 240 to form a second reflected light 125, the second reflected light 125 is refracted at the inner layer glass 210 to form a second emergent light 126, the second emergent light 126 enters the user visual field 300, and a second virtual image 128 corresponding to the projected image is formed on a second reverse extension line 127 of the second emergent light 126.
The third projected light 131 corresponding to the projected image and emitted from the first right display 130 is reflected by the first inclined transflective film 140 to form a third reflected light 132, and the third reflected light 132 is reflected by the horizontal transflective film 150 to form a third incident light 133 incident on the windshield 200. The third incident light 133 is refracted at the inner layer glass 210 to form a third refracted light 134, the third refracted light 134 is reflected at the image magnifier 240 to form a fourth reflected light 135, the fourth reflected light 135 is refracted at the inner layer glass 210 to form a third emergent light 136, the third emergent light 136 enters the user visual field 300, and a third virtual image 138 corresponding to the projected image is formed on a third reverse extension line 137 of the third emergent light 136.
The first, second and third projected light rays 121 and 131 correspond to the same projected image, and the first, second and third incident light rays 113, 123 and 133 incident on the windshield 200 are formed to be parallel to each other but have different optical path lengths. The optical path length refers to the distance of the path traveled by the light, for example, the optical path length of the first incident light 113 is the distance of the path traveled by the light from the bottom display 110 to the windshield 200; the optical path length of the second incident light ray 123 is a path distance traveled by the second projection light ray 121 from the first left display 120, reflected by the first inclined transflective film 140, and then to the windshield 200; the optical path length of the third incident light ray 133 is a distance of a path that the third projection light ray 131 starts from the first right display 130, is reflected by the first inclined transflective film 140, and then is reflected by the horizontal transflective film 150 to travel to the windshield 200. In this way, the first virtual image 118, the second virtual image 128, and the third virtual image 138 formed on the front side of the windshield 200 are different in display distance from each other, and they are superimposed on each other, that is, a stereoscopic projected image having a 3D effect can be formed.
The technical solutions of a set of left display, tilted transflective film and right display are given above, as those skilled in the art will understand, in order to obtain better stereoscopic projection images, the left display, tilted transflective film and right display may be two, three or more sets.
For example, fig. 2 shows a technical solution of two sets of left display, tilted transflective film and right display, that is, on the basis of the above solution, a second left display 170, a second tilted transflective film 141 and a second right display 180 are added, and the structures of the second left display 170, the second tilted transflective film 140 and the second right display 180 are the same as the structures of the first left display 120, the first tilted transflective film 140 and the first right display 130, and are correspondingly arranged above the first left display 120, the first tilted transflective film 140 and the first right display 130. The fourth projected light 171 corresponding to the projected image from the second left display 170 is reflected by the second inclined transflective film 141 to form a fourth incident light 173 incident on the windshield 200. The fifth projected light 181 corresponding to the projected image and emitted from the second right display 180 is reflected by the second inclined transflective film 141 to form a fifth reflected light 182, and the fifth reflected light 182 is reflected by the horizontal transflective film 150 to form a fifth incident light 183 entering the windshield 200. Obviously, the optical path lengths of the first to fifth incident light rays are different from each other. According to the technical scheme of two groups of left displays, inclined semi-reflecting and semi-transmitting films and right displays, when the left displays, the inclined semi-reflecting and semi-transmitting films and the right displays are more groups, the left displays, the inclined semi-reflecting and semi-transmitting films and the right displays are sequentially arranged above the bottom display 110 from bottom to top.
As will also be understood by those skilled in the art, in order to obtain better stereoscopic projection images, the number of the bottom displays 110 may be multiple, and a plurality of the bottom displays 110 are spaced between the left and right displays in the pair under the horizontal transflective film 150. Since the windshield 200 is tilted, the incident light rays emitted from each of the bottom displays 110 also have different optical path lengths.
The projection unit 100 further includes a projection unit housing 160, the bottom display 110 and the horizontal transflective film 150 are mounted at the bottom of the inner side of the projection unit housing 160, and the left display, the inclined transflective film and the right display are mounted on the inner wall of the projection unit housing 160.
In some embodiments, the projection light rays emitted by each display are P-type linearly polarized light rays, and include first projection light ray 121, second projection light ray 121, third projection light ray 131, fourth projection light ray 171, and fifth projection light ray 181. The incident light rays are parallel to each other and have a brewster angle with the inner layer glass 210, and include a first incident light ray 113, a second incident light ray 123, a third incident light ray 133, a fourth incident light ray 173, and a fifth incident light ray 183.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A heads-up display system, comprising:
a windshield (200);
a projection unit (100) for emitting a plurality of incident light rays, which are parallel to each other and correspond to the same projected image, to a windshield (200), the plurality of incident light rays having different optical path lengths; the incident light rays are reflected inside the windshield (200) to form a plurality of parallel emergent light rays;
a plurality of virtual images with different display distances are formed in the visual field (300) of the user by the plurality of emergent light rays, and the virtual images are superposed to form a projection image with a 3D (three-dimensional) effect.
2. The heads-up display system according to claim 1, characterized in that the projection unit (100) comprises:
the bottom display (110) is horizontally arranged, and a horizontal semi-reflecting and semi-transmitting film (150) which is parallel to the bottom display (110) is arranged above the bottom display;
the left display and the right display are arranged in pair in parallel and oppositely and vertically arranged above the bottom display (110), and an inclined semi-reflecting and semi-transparent film is arranged between the left display and the right display in pair, and the inclination angle is 45 degrees;
projected light rays emitted by the bottom display (110) form incident light rays entering the windshield (200) after passing through the horizontal semi-reflecting and semi-transparent film (150); the projected light emitted by the left display is reflected by the inclined semi-reflecting and semi-transmitting film to form incident light entering the windshield (200); and the projected light rays emitted by the right display are reflected by the inclined semi-reflecting and semi-transmitting film and the horizontal semi-reflecting and semi-transmitting film (150) in sequence to form incident light rays which enter the windshield (200).
3. The heads-up display system of claim 2, wherein the left and right displays are in pairs, the pairs being arranged in bottom-up order above the bottom display (110).
4. The head-up display system according to claim 2, wherein the number of the bottom displays (110) is plural, and the bottom displays are arranged at intervals between the left display and the right display in the pair under the horizontal transflective film (150).
5. The heads-up display system of claim 2 wherein the bottom display (110), the horizontal transflective film (150), the tilted transflective film, the left display and the right display are mounted in a projection unit housing (160).
6. The head-up display system according to any one of claims 2 to 5, wherein the windshield (200) comprises an inner layer of glass (210), an image magnifier (240), a PVB interlayer (230) and an outer layer of glass (220) arranged in sequence, the image magnifier (240) comprises a positive Fresnel lens (241), a negative Fresnel lens (242) and a first semi-transparent semi-membrane (243) between the positive Fresnel lens and the negative Fresnel lens, wherein the positive Fresnel lens (241) is attached to the inner layer of glass (210), and the negative Fresnel lens (242) is attached to the PVB interlayer (230).
7. The heads-up display system of claim 6 wherein the projected light from each display is P-type linearly polarized light.
8. The head-up display system of claim 7, wherein the incident angle of the plurality of incident light rays with the inner glass (210) is at the brewster angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211292336.0A CN115561905A (en) | 2022-10-21 | 2022-10-21 | Head-up display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211292336.0A CN115561905A (en) | 2022-10-21 | 2022-10-21 | Head-up display system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115561905A true CN115561905A (en) | 2023-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211292336.0A Pending CN115561905A (en) | 2022-10-21 | 2022-10-21 | Head-up display system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115561905A (en) |
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2022
- 2022-10-21 CN CN202211292336.0A patent/CN115561905A/en active Pending
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