CN112255810A - Anti-sun glare head-up display optical system based on small inclination angle - Google Patents
Anti-sun glare head-up display optical system based on small inclination angle Download PDFInfo
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- CN112255810A CN112255810A CN202011464323.8A CN202011464323A CN112255810A CN 112255810 A CN112255810 A CN 112255810A CN 202011464323 A CN202011464323 A CN 202011464323A CN 112255810 A CN112255810 A CN 112255810A
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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
- 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
- G02B27/0179—Display position adjusting means not related to the information to be displayed
-
- 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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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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
- G02B27/0179—Display position adjusting means not related to the information to be displayed
- G02B2027/0183—Adaptation to parameters characterising the motion of the vehicle
Abstract
Provided is a head-up display optical system which is resistant to sun glare and based on a small inclination angle. The automobile windscreen light source comprises at least a light emitting source, a polarizing flat plate spectroscope, a curved mirror, an automobile windscreen, an eye box, a virtual image forming position and sunlight, wherein the curved mirror is arranged below the automobile windscreen; a wave plate is arranged between the polarizing plate spectroscope and the curved mirror; and a polarizing film is additionally arranged between the polarizing plate spectroscope and the automobile windshield. The head-up display optical system is characterized in that a light splitting mirror is additionally arranged on a front light path and a rear light path of the curved mirror to realize that incident light and reflected light of the curved mirror are small inclination angles, and a polaroid is additionally arranged between the light splitting mirror and the windshield to prevent sun glare from being reflected to a light emitting source position, so that light spots can be reduced, sun glare can be resisted, and the head-up display optical system is high in image quality and clear in display.
Description
Technical Field
The invention relates to vehicle-mounted optical display equipment, in particular to a head-up display optical system which is characterized in that a light splitting mirror is additionally arranged on a front light path and a rear light path of a curved mirror to realize that incident light and reflected light of the curved mirror have small inclination angles, and a polaroid is additionally arranged between the light splitting mirror and a windshield to ensure that solar glare cannot be reflected to the position of a light emitting source, so that light spots are reduced, and the solar glare can be prevented.
Background
When light passes through the surface of an optical element (e.g., a beam splitter) at a non-perpendicular angle, both reflection and transmission characteristics depend on polarization phenomena, in which case the coordinate system used is defined by the plane containing the input and reflected beams, and is called p-polarization if the polarization vector of the light is in this plane, and s-polarization if the polarization vector is perpendicular to this plane; any one of the input polarization states can be represented as a vector sum of s-polarization and p-polarization.
Wave plates, also known as phase retarders, are fabricated from birefringent materials. The phase shift of two mutually orthogonal polarization components passing through the wave plate is generated, and the phase shift can be used for adjusting the polarization state of the light beam; the polarizing plate has a function of shielding and transmitting incident light, and can transmit longitudinal light or transverse light, and shield the longitudinal light or the transverse light.
With the development of the automobile industry, the technology of assisting driving is changing day by day, and the application of the vehicle-mounted head-up display equipment is increasingly wide, and the structure of the vehicle-mounted head-up display equipment mainly comprises a luminous source, a curved mirror, an automobile windshield and an eye box.
On-vehicle new line display device has obviously brought a lot of facilities for the driver, for example look over the speed per hour, it is more convenient during important driving information such as navigation, just can see without the low head, or look over the below of car, the rear also need not turn round the head, the low head, the driver has been made things convenient for greatly, more can concentrate on driving the car, the comfort level is corresponding increase also, in the design of current new line display, in order to reach high image quality under the condition of not interfering, the design of low distortion, curved mirror and light can produce a very big inclination, reach reasonable light path structure with this, however, this can produce two very big defects:
firstly, a large inclination angle between the mirror and the light can cause serious non-coaxial aberration, so that the projected image can be blurred and distorted;
secondly, the sunlight can cause serious glare in the HUD head-up display optical system, so as to affect the performance of the driver in driving.
As fig. 3, among the present new line display optical system, its structure includes light emitting source 1 ', polarization flat plate spectroscope 2', curved mirror 3 ', car windshield 4', eye box 5 ', becomes virtual image position, sunlight 6', light screen 9 ', the curved mirror sets up in car windshield's below, it is located the dead ahead of eye box to become the virtual image position, the middle of light emitting source and curved mirror sets up polarization flat plate spectroscope, the sunlight is located car windshield's top, be provided with wave plate 7' in the middle of polarization flat plate spectroscope and the curved mirror, the wave plate is used for the angle modulation of the polarization vector of linearly polarized light.
The glare effect process of the existing head-up display optical system is as follows:
dividing sunlight into S polarized light and P polarized light; because no polaroid is arranged between the polarizing plate spectroscope and the automobile windshield, sunlight of S polarized light and P polarized light passes through the automobile windshield and directly reaches the polarizing plate spectroscope; s polarized light is reflected to the wave plate by the polarization plate spectroscope; then the S polarized light passes through the wave plate for the first time and is converted into LC polarized light; the LC polarized light is reflected by the curved mirror and converted into RC polarized light; the RC polarized light passes through the wave plate and is converted into P polarized light; the P polarized light continuously passes through the polarizing plate spectroscope and finally reaches the position of the light emitting source; when sunlight reaches the light emitting source, a driver sees dazzling sunlight glare in an image of the head-up display, and the light emitting source is burned out by the sunlight.
Disclosure of Invention
The invention aims to solve the technical problems and provides a small-inclination-angle-based head-up display optical system capable of resisting solar glare, wherein a beam splitter is additionally arranged on a front light path and a rear light path of a curved mirror of the head-up display optical system to realize that incident light and reflected light of the curved mirror are small in inclination angle, and a polarizing plate is additionally arranged between the beam splitter and a windshield to prevent solar glare from being reflected to a light-emitting source position, so that light spots can be reduced, solar glare can be resisted, and the head-up display optical system is high in image quality and clear in display.
In order to solve the above-mentioned prior art problems, the technical scheme of the invention is as follows:
the invention relates to a head-up display optical system capable of resisting sun glare and based on a small inclination angle, which at least comprises a light-emitting source, a polarizing flat-plate spectroscope, a curved mirror, an automobile windshield, an eye box, a virtual image forming position and sunlight, wherein the curved mirror is arranged below the automobile windshield, the virtual image forming position is positioned right in front of the eye box, the polarizing flat-plate spectroscope is arranged between the light-emitting source and the curved mirror, and the sunlight is positioned above the automobile windshield;
as an improvement, a wave plate is arranged between the polarization flat spectroscope and the curved mirror and is used for adjusting the angle of the polarization vector of linearly polarized light;
as an improvement, a polarizing plate is additionally arranged between the polarizing plate spectroscope and the automobile windshield, the polarizing plate is used for absorbing S polarized light in sunlight, and a light shielding plate is further arranged on one side of the polarizing plate spectroscope and used for absorbing P polarized light in the sunlight.
The image display process of the head-up display optical system comprises the following steps: setting the polarization state of the light emitting source as P polarized light for emitting light, enabling the P polarized light to pass through the polarization plate spectroscope for carrying out light angle adjustment, and enabling the emergent light to reach the wave plate; the emergent light of the polarizing plate spectroscope passes through the wave plate, at the moment, the light of the luminous source passes through the wave plate for the first time, and the emergent light angle is controlled by the polarizing plate spectroscope, so that the polarization state of the light of the luminous source is converted into RC (right circular) polarized light through the wave plate; then the RC polarized light is converted into LC (left circular) polarized light through the reflection of the curved mirror; when the LC polarized light passes through the wave plate, the LC polarized light is converted into S polarized light to emit light, and the light of the light source passes through the wave plate for the second time; s polarized light contacts the polarizing plate spectroscope and is reflected by the polarizing plate spectroscope; the S polarized light reflected by the polarizing plate beam splitter passes through the polarizing plate; and finally, the light of the light source penetrating through the polaroid is reflected to the eye box through the automobile windshield, and the human eyes at the eye box see the virtual image enlarged in the virtual image position through the reverse extension line of the light, so that the image display is realized.
In the image display process, the P polarized light passes through the polarizing plate spectroscope and the S polarized light passes through the polaroid without effective loss;
in the image display process, the polarizing plate spectroscope adjusts the angle of incident light, and the position of the polarizing plate spectroscope is adjusted, so that the incident angle of the light emitted to the wave plate and the curved mirror by the polarizing plate spectroscope is a small inclination angle which is 0.5-5 degrees;
in the image display process, the position of the polarizing plate spectroscope can be adjusted, when the light of the light source passes through the wave plate for the first time, the polarization state of the light source is converted into LC (left circular) polarized light by the wave plate, and other processes are the same as the image display process, so that the image display can be realized.
The anti-sun glare process of the head-up display optical system comprises the following steps: dividing sunlight into S polarized light and P polarized light; sunlight of the S polarized light and the P polarized light passes through the automobile windshield; then the S polarized light passes through the polaroid, the energy of the S polarized light is absorbed by the polaroid, and the P polarized light continues to penetrate through the polaroid; the P polarized light can continuously pass through the polarizing plate spectroscope and is finally absorbed by the light shielding plate; therefore, sunlight cannot be reflected by the polarizing plate spectroscope and cannot reach the position of the luminous source, and the function of resisting sun glare is achieved.
The invention discloses a head-up display optical system with sun glare resistance and based on a small inclination angle, which has the following beneficial effects:
1. the head-up display optical system is additionally provided with the spectroscope on the front and rear light paths of the curved mirror to realize that the incident light and the reflected light of the curved mirror have small inclination angles, so that light spots are reduced, and the head-up display optical system has high image quality and small distortion;
2. the polaroid is additionally arranged between the spectroscope and the windshield, so that the sun glare cannot be reflected to the position of the light emitting source, the sun glare can be resisted, the head-up display optical system is enabled to display clearly, and the comfort level of a driver is high.
Drawings
FIG. 1 is an image display optical path diagram of a small-tilt-angle-based head-up display optical system with anti-solar glare features;
fig. 2 is a light path diagram of the anti-solar glare head-up display optical system based on a small inclination angle and resistant to solar glare according to the present invention;
fig. 3 is a light path diagram of a conventional head-up display optical system for generating solar flare light.
Detailed Description
The invention is further illustrated by the following examples:
example (b):
as shown in fig. 1 and fig. 2, the head-up display optical system of the present invention is anti-glare from the sun and based on a small inclination angle, the head-up display optical system at least includes a light source 1, a polarizing plate spectroscope 2, a curved mirror 3, an automobile windshield 4, an eye box 5, a virtual image forming position, and sunlight 6, the curved mirror 3 is disposed below the automobile windshield 4, the virtual image forming position is located right in front of the eye box 5, a polarizing plate spectroscope 2 is disposed between the light source 1 and the curved mirror 3, and the sunlight 6 is located above the automobile windshield 4;
a wave plate 7 is arranged between the polarization flat spectroscope 2 and the curved mirror 3 and is used for adjusting the angle of the polarization vector of linearly polarized light;
a polarizing film 8 is additionally arranged between the polarization flat spectroscope 2 and the automobile windshield 4 and used for absorbing S polarized light in sunlight, and a light shielding plate 9 is further arranged on one side of the polarization flat spectroscope 2 and used for absorbing P polarized light in sunlight.
The image display process of the head-up display optical system comprises the following steps: setting the polarization state of the light emitting source as P polarized light for emitting light, enabling the P polarized light to pass through the polarization plate spectroscope for carrying out light angle adjustment, and enabling the emergent light to reach the wave plate; the emergent light of the polarizing plate spectroscope passes through the wave plate, at the moment, the light of the luminous source passes through the wave plate for the first time, and the emergent light angle is controlled by the polarizing plate spectroscope, so that the polarization state of the light of the luminous source is converted into RC (right circular) polarized light through the wave plate; then the RC polarized light is converted into LC (left circular) polarized light through the reflection of the curved mirror; when the LC polarized light passes through the wave plate, the LC polarized light is converted into S polarized light to emit light, and the light of the light source passes through the wave plate for the second time; s polarized light contacts the polarizing plate spectroscope and is reflected by the polarizing plate spectroscope; the S polarized light reflected by the polarizing plate beam splitter passes through the polarizing plate; and finally, the light of the light source penetrating through the polaroid is reflected to the eye box through the automobile windshield, and the human eyes at the eye box see the virtual image enlarged in the virtual image position through the reverse extension line of the light, so that the image display is realized.
In the image display process, the P polarized light passes through the polarizing plate spectroscope and the S polarized light passes through the polaroid without effective loss;
in the image display process, the polarizing plate spectroscope adjusts the angle of incident light, and the position of the polarizing plate spectroscope is adjusted, so that the incident angle of the light emitted to the wave plate and the curved mirror by the polarizing plate spectroscope is a small inclination angle which is 0.5-5 degrees;
in the image display process, the position of the polarizing plate spectroscope can be adjusted, when the light of the light source passes through the wave plate for the first time, the polarization state of the light source is converted into LC (left circular) polarized light by the wave plate, and other processes are the same as the image display process, so that the image display can be realized.
The anti-sun glare process of the head-up display optical system comprises the following steps: dividing sunlight into S polarized light and P polarized light; sunlight of the S polarized light and the P polarized light passes through the automobile windshield; then the S polarized light passes through the polaroid, the energy of the S polarized light is absorbed by the polaroid, and the P polarized light continues to penetrate through the polaroid; the P polarized light can continuously pass through the polarizing plate spectroscope and is finally absorbed by the light shielding plate; therefore, sunlight cannot be reflected by the polarizing plate spectroscope and cannot reach the position of the luminous source, and the function of resisting sun glare is achieved.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (6)
1. The utility model provides an anti sun dazzles light and shows optical system that comes back to head based on little inclination which characterized in that:
the head-up display optical system at least comprises a luminous source, a polarization flat plate spectroscope, a curved mirror, an automobile windshield, an eye box, a virtual image forming position and sunlight, wherein the curved mirror is arranged below the automobile windshield;
a wave plate is arranged between the polarization flat spectroscope and the curved mirror and is used for adjusting the angle of the polarization vector of linearly polarized light;
a polarizing film is additionally arranged between the polarization flat spectroscope and the windshield of the automobile and used for absorbing S polarized light in sunlight, and a light shielding plate is further arranged on one side of the polarization flat spectroscope and used for absorbing P polarized light in the sunlight.
2. The head-up display optical system with sun glare resistance and based on small inclination angle according to claim 1, wherein the image display process of the head-up display optical system is as follows: setting the polarization state of the light emitting source as P polarized light for emitting light, enabling the P polarized light to pass through the polarization plate spectroscope for carrying out light angle adjustment, and enabling the emergent light to reach the wave plate; the emergent light of the polarizing plate spectroscope passes through the wave plate, at the moment, the light of the luminous source passes through the wave plate for the first time, and the emergent light angle is controlled by the polarizing plate spectroscope, so that the polarization state of the light of the luminous source is converted into RC (right circular) polarized light through the wave plate; then the RC polarized light is converted into LC (left circular) polarized light through the reflection of the curved mirror; when the LC polarized light passes through the wave plate, the LC polarized light is converted into S polarized light to emit light, and the light of the light source passes through the wave plate for the second time; s polarized light contacts the polarizing plate spectroscope and is reflected by the polarizing plate spectroscope; the S polarized light reflected by the polarizing plate beam splitter passes through the polarizing plate; and finally, the light of the light source penetrating through the polaroid is reflected to the eye box through the automobile windshield, and the human eyes at the eye box see the virtual image enlarged in the virtual image position through the reverse extension line of the light, so that the image display is realized.
3. The solar glare-resistant small-tilt-angle-based head-up display optical system according to claim 2, wherein the P-polarized light passing through the polarizing plate beam splitter and the S-polarized light passing through the polarizer are not efficiently lost during the image display.
4. The head-up display optical system according to claim 2, wherein the polarization plate beam splitter performs an incident light angle adjustment during the image display process, and the incident angle of the light emitted from the polarization plate beam splitter to the wave plate and the curved mirror is a small inclination angle by adjusting the position of the polarization plate beam splitter, and the small inclination angle is 0.5-5 degrees.
5. The head-up display optical system with solar glare resistance and small inclination angle as claimed in claim 1, wherein the image display process can also be implemented by adjusting the position of the polarization plate beam splitter, so that the polarization state of the light from the light source is converted into LC (left circular) polarized light by the wave plate when the light from the light source passes through the wave plate for the first time, and other processes are the same as the image display process.
6. The head-up display optical system based on small inclination angle and resisting solar glare according to claim 1, wherein the head-up display optical system has the following anti-solar glare process: dividing sunlight into S polarized light and P polarized light; sunlight of the S polarized light and the P polarized light passes through the automobile windshield; then the S polarized light passes through the polaroid, the energy of the S polarized light is absorbed by the polaroid, and the P polarized light continues to penetrate through the polaroid; the P polarized light can continuously pass through the polarizing plate spectroscope and is finally absorbed by the light shielding plate; therefore, sunlight cannot be reflected by the polarizing plate spectroscope and cannot reach the position of the luminous source, and the function of resisting sun glare is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011464323.8A CN112255810A (en) | 2020-12-14 | 2020-12-14 | Anti-sun glare head-up display optical system based on small inclination angle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011464323.8A CN112255810A (en) | 2020-12-14 | 2020-12-14 | Anti-sun glare head-up display optical system based on small inclination angle |
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| CN112255810A true CN112255810A (en) | 2021-01-22 |
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| CN202011464323.8A Pending CN112255810A (en) | 2020-12-14 | 2020-12-14 | Anti-sun glare head-up display optical system based on small inclination angle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061911A (en) * | 2021-11-16 | 2022-02-18 | 深圳市锐思华创技术有限公司 | Glaring detection system of head-up display |
| CN115561955A (en) * | 2021-10-14 | 2023-01-03 | 华为技术有限公司 | Display device, electronic apparatus, and vehicle |
| WO2023102915A1 (en) * | 2021-12-10 | 2023-06-15 | 华为技术有限公司 | Image display method and device |
| WO2024045883A1 (en) * | 2022-08-27 | 2024-03-07 | 华为技术有限公司 | Display device, display method, and vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045199A (en) * | 2016-02-05 | 2017-08-15 | 尚立光电股份有限公司 | Head-up display optical device |
| CN210666208U (en) * | 2019-09-02 | 2020-06-02 | 未来（北京）黑科技有限公司 | Head-up display device |
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2020
- 2020-12-14 CN CN202011464323.8A patent/CN112255810A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045199A (en) * | 2016-02-05 | 2017-08-15 | 尚立光电股份有限公司 | Head-up display optical device |
| CN210666208U (en) * | 2019-09-02 | 2020-06-02 | 未来（北京）黑科技有限公司 | Head-up display device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115561955A (en) * | 2021-10-14 | 2023-01-03 | 华为技术有限公司 | Display device, electronic apparatus, and vehicle |
| CN115561955B (en) * | 2021-10-14 | 2023-09-29 | 华为技术有限公司 | Display device, electronic apparatus, and vehicle |
| CN114061911A (en) * | 2021-11-16 | 2022-02-18 | 深圳市锐思华创技术有限公司 | Glaring detection system of head-up display |
| CN114061911B (en) * | 2021-11-16 | 2023-09-15 | 深圳市锐思华创技术有限公司 | Dazzle light detection system of head-up display |
| WO2023102915A1 (en) * | 2021-12-10 | 2023-06-15 | 华为技术有限公司 | Image display method and device |
| WO2024045883A1 (en) * | 2022-08-27 | 2024-03-07 | 华为技术有限公司 | Display device, display method, and vehicle |
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