WO2014023830A1 - Laser scanning head-up-display system for vehicles - Google Patents
Laser scanning head-up-display system for vehicles Download PDFInfo
- Publication number
- WO2014023830A1 WO2014023830A1 PCT/EP2013/066725 EP2013066725W WO2014023830A1 WO 2014023830 A1 WO2014023830 A1 WO 2014023830A1 EP 2013066725 W EP2013066725 W EP 2013066725W WO 2014023830 A1 WO2014023830 A1 WO 2014023830A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- laser
- head
- display
- displayed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
-
- 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
- G02B27/48—Laser speckle optics
-
- 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
- G02B2027/0141—Head-up displays characterised by optical features characterised by the informative content of the display
-
- 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
- G02B2027/0147—Head-up displays characterised by optical features comprising a device modifying the resolution of the displayed image
Definitions
- the present invention relates to a head-up display according to the preamble of claim 1.
- Head-up displays are known from the prior art and are used to display information in a virtual plane, for example, in front of the windshield of a motor vehicle. A vehicle occupant or a driver of the vehicle can read the information without having to lower his view of the dashboard. In this way, the comfort and safety for the driver are increased.
- the image to be displayed is usually first projected onto a projection surface as an intermediate level and then enlarged before it is reflected on the windshield or a so-called combiner and then seen in the virtual plane in front of the windshield.
- a laser is preferably used as the radiation source, which generates the image to be displayed by the so-called "laser scanning method”.
- the object of the present invention to provide a head-up display that does not have the disadvantages of the prior art and ensures a better display quality.
- the head-up display should have no perceivable for a viewer unwanted brightness differences.
- a head-up display which has a laser, in particular an RGB laser, and a scanning system, with which the image to be displayed punctually is projected into a virtual image plane with a projection system having a projection surface and a magnifying optical system and thereby enlarged, wherein the projection system is designed so that the size of the points in the virtual image plane is smaller than the resolution of the human eye.
- the sizes of the dots are chosen to be smaller than the resolution of the human eye.
- the display quality of the image displayed in the virtual plane is thus significantly improved compared to the prior art.
- the resolution of the human eye is under ideal conditions about 0.5 'to 1' (corresponding to 1 mm to 3-6 meters).
- the projection system of the head-up display according to the invention is therefore chosen in particular such that the sizes of the points in the virtual plane are smaller than 0.5 'for the viewing vehicle occupant or driver. It is conceivable to replace the term laser point preferably by the term pixel.
- the laser is chosen so that the laser spots on the projection surface are so small that they are still smaller than the resolution of the human eye after enlarging the image to be displayed in the virtual image plane.
- the number of laser spots with which the image to be displayed is displayed on the projection surface is chosen to be so large that the human eye can no longer individually perceive the individual laser spots in the virtual plane.
- a high resolution is thus achieved that no differences in brightness are perceived by the observer or vehicle occupants, and thus an improved display quality compared to the prior art is achieved.
- two points are perceived separately by the human eye when their angular distance is 2 '.
- the head-up display is therefore in particular configured such that the angular distance between two adjacent points for the vehicle occupant or driver is always less than 0.5 '. This ensures that neighboring points are always perceived by the viewer as a contiguous area.
- the scanning system is configured such that a scan frequency with which the delivering image is higher than the perceptual frequency of the human eye.
- a scan frequency with which the delivering image is higher than the perceptual frequency of the human eye.
- Another object of the present invention is a method for operating a head-up display in a vehicle, in particular according to one of the preceding claims, wherein projected by means of a laser and a scanning system consisting of a plurality of laser spots projection image on a projection plane pointwise is generated by means of a projection system, an enlarged virtual image of the projection image in a field of view of a driver of the vehicle, characterized in that the laser spots are projected into the field of view of the driver that the size of the projected into the virtual image plane laser dots is smaller than the resolving power of the human eye.
- such small laser spots are generated on the projection surface by means of the laser that the laser spots after enlargement of the image to be displayed in the virtual image plane are still smaller than the resolving power of the human eye.
- the number of laser spots with which the image to be displayed is displayed on the projection surface is selected to be so large that the human eye no longer individualises the individual laser spots in the virtual plane can perceive.
- the virtual image is projected into the virtual image plane by means of relay optics.
- the image to be displayed is generated at a scanning frequency which is higher than the maximum perceivable image frequency of a person, in particular higher than 20 Hz.
- FIG. 1 shows the head-up display according to the invention.
- Figure 2 shows the generation of the image on the projection plane.
- FIG. 3 shows possible scanning paths of a laser point for generating the image to be displayed.
- FIG. 4 shows discrete laser spot points for generating the image to be displayed
- FIG. 1 shows two possible head-up displays 1 according to the invention.
- the two head-up displays 1 are identical, wherein the left-hand head-up display 1 is the so-called reflection type and the right-hand head-up display 1 is the so-called transmission type.
- an image to be displayed from individual laser points is constructed pointwise with a laser 20 and a corresponding mechanism 2, projected onto a projection plane 3 and reflected there.
- This image, which is reflected by the projection plane 3, is enlarged by means of a magnifying optical unit 4 of a projection system 30 and reflected on the windshield 6 into a virtual image plane 5, in which the image, here a heart 50, is visible to the human eye 7 of the vehicle driver.
- the head-up display 1 on the right side substantially corresponds to the representation of the head-up display 1 on the left side, wherein in the present case the image to be displayed on the projection plane 3 is not reflected, but transmitted through the projection plane 3 becomes.
- the projection system 30 is now configured according to the invention such that the laser spots with which the image is produced on the projection plane 3 are so small that they are smaller even after their magnification and representation in the virtual plane 5 by the projection system 30 in particular, the magnitudes of the points in the virtual plane 5 are smaller than 0.5 'for the viewing vehicle driver.
- the number of laser spots with which the image to be displayed is displayed on the projection surface 3 is chosen to be so large that the human eye 7 can no longer individually perceive the individual laser spots in the virtual plane 5. The resolution of the image to be displayed thus exceeds the maximum possible resolution of the human eye. 7
- FIG. 2 shows a red-green-blue laser 20.
- the laser light 22 of different wavelengths emitted by the individual laser sources 20 '(red, green, blue) is first of all passed through a collimator 8, which aligns the beams of the respective laser source 20 parallel to one another. Thereafter, the beams of different wavelengths are combined with each other via two mirrors 23 and moved with a scanning system 21, in particular a mechanism and / or optics, so that the desired image is formed on the projection surface 3.
- the image is thereby constructed from individual ray packets which are generated by line-like scanning of the projection surface 3 by the collimated laser beam 22 and corresponding switching on / off of the differently colored laser sources 20 'and form the individual laser spots on the projection surface 3.
- the extent of the laser spots in the area of the projection surface 3 is dimensioned such that the extent of the laser spots is smaller than the maximum resolution of the human eye 7 even after the laser points have been enlarged by the projection system 30 into the virtual plane 5. Via a lens system, the laser beam 22 is projected onto the projection surface 3.
- FIG. 3 shows an example of a possible movement pattern of the laser spot for generating the desired image 50.
- the scanning frequency of this laser spot is preferably higher than the temporal resolving power of the human eye 7, d. H. It generates so many images per second that the individual images are no longer perceptible to the human eye.
- the scanning system 21 of the head-up display 1 is configured such that the scanning frequency with which the image 50 to be displayed is generated is higher than the perception frequency of the human eye 7.
- the boundaries of the human eye 7 are shown schematically as the maximum resolution 24.
- FIG. 4 schematically shows different laser points for generating the desired image during the scanning process.
- the laser spots 9 are so small and / or their number is so high that the human eye 7 can no longer resolve the individual laser spots.
- the boundaries of the human eye 7 are shown schematically as the maximum resolution 24. Due to the limited resolution of the human eye 7, the plurality of small laser spots 9 are recognized by the viewer as a common image area. LIST OF REFERENCE NUMBERS
- HUD head-up display
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Instrument Panels (AREA)
- Mechanical Optical Scanning Systems (AREA)
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015525902A JP2015531083A (ja) | 2012-08-10 | 2013-08-09 | 車両用のレーザ走査ヘッドアップディスプレイ装置 |
| US14/420,478 US9541760B2 (en) | 2012-08-10 | 2013-08-09 | Laser scanning head-up display system for vehicles |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012015809 | 2012-08-10 | ||
| DE102012015809.2 | 2012-08-10 | ||
| DE102013001097.7A DE102013001097A1 (de) | 2012-08-10 | 2013-01-23 | Head-up-Display und Verfahren zum Betrieb eines Head-up-Displays |
| DE102013001097.7 | 2013-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014023830A1 true WO2014023830A1 (de) | 2014-02-13 |
Family
ID=49999264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2013/066725 Ceased WO2014023830A1 (de) | 2012-08-10 | 2013-08-09 | Laser scanning head-up-display system for vehicles |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9541760B2 (de) |
| JP (1) | JP2015531083A (de) |
| DE (1) | DE102013001097A1 (de) |
| WO (1) | WO2014023830A1 (de) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2712059A1 (en) | 2008-01-22 | 2009-07-30 | The Arizona Board Of Regents On Behalf Of The University Of Arizona | Head-mounted projection display using reflective microdisplays |
| US20110075257A1 (en) | 2009-09-14 | 2011-03-31 | The Arizona Board Of Regents On Behalf Of The University Of Arizona | 3-Dimensional electro-optical see-through displays |
| CN102782562B (zh) | 2010-04-30 | 2015-07-22 | 北京理工大学 | 宽视场高分辨率拼接式头盔显示装置 |
| JP6141584B2 (ja) | 2012-01-24 | 2017-06-07 | アリゾナ ボード オブ リージェンツ オン ビハーフ オブ ザ ユニバーシティ オブ アリゾナ | 小型視線追従型ヘッドマウントディスプレイ |
| CA3102710A1 (en) | 2012-10-18 | 2014-04-24 | The Arizona Board Of Regents On Behalf Of The University Of Arizona | Stereoscopic displays with addressable focus cues |
| KR102539365B1 (ko) | 2014-03-05 | 2023-06-01 | 아리조나 보드 오브 리전츠 온 비해프 오브 더 유니버시티 오브 아리조나 | 가변 초점 및/또는 객체 인식 기능을 가진 웨어러블 3d 증강 현실 디스플레이 |
| US10176961B2 (en) | 2015-02-09 | 2019-01-08 | The Arizona Board Of Regents On Behalf Of The University Of Arizona | Small portable night vision system |
| US10739578B2 (en) | 2016-08-12 | 2020-08-11 | The Arizona Board Of Regents On Behalf Of The University Of Arizona | High-resolution freeform eyepiece design with a large exit pupil |
| US10122990B2 (en) * | 2016-12-01 | 2018-11-06 | Varjo Technologies Oy | Imaging system and method of producing context and focus images |
| CA3055545A1 (en) | 2017-03-09 | 2018-09-13 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Head-mounted light field display with integral imaging and waveguide prism |
| AU2018231081B2 (en) | 2017-03-09 | 2023-03-09 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Head-mounted light field display with integral imaging and relay optics |
| CN109116557A (zh) * | 2017-06-23 | 2019-01-01 | 京东方科技集团股份有限公司 | 平视显示装置及行驶装置 |
| JP7185331B2 (ja) | 2018-03-22 | 2022-12-07 | アリゾナ ボード オブ リージェンツ オン ビハーフ オブ ザ ユニバーシティ オブ アリゾナ | インテグラルイメージング方式のライトフィールドディスプレイ用にライトフィールド画像をレンダリングする方法 |
| DE102021130561A1 (de) | 2021-11-23 | 2023-05-25 | Carl Zeiss Jena Gmbh | Projektor oder display mit scannender lichtquelle und pixeliertem array |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0251118A (ja) * | 1988-08-12 | 1990-02-21 | Hitachi Zosen Corp | 光偏向装置 |
| US4973139A (en) | 1989-04-07 | 1990-11-27 | Hughes Aircraft Company | Automotive head-up display |
| DE19540108C2 (de) | 1995-10-27 | 1998-08-06 | Ldt Gmbh & Co | Vorrichtung zur Darstellung eines ersten Bildes in einem durch eine durchsichtige Scheibe sichtbaren zweiten Bild |
| DE10035040B4 (de) | 2000-07-19 | 2005-04-14 | Robert Bosch Gmbh | Abtastvorrichtung |
| JP2003140593A (ja) * | 2001-11-05 | 2003-05-16 | Sony Corp | 映像表示方法及び装置、並びに映像表示用光源装置 |
| JP4031481B2 (ja) * | 2005-01-05 | 2008-01-09 | 日本電信電話株式会社 | 投影型表示器 |
| DE102006040346A1 (de) | 2006-08-29 | 2008-03-13 | Robert Bosch Gmbh | Ablenkvorrichtung für eine Projektionsvorrichtung und entsprechendes Bildgebungsverfahren |
| US7970028B2 (en) * | 2008-01-30 | 2011-06-28 | Corning Incorporated | System and methods for speckle reduction |
| JP5310466B2 (ja) * | 2009-10-14 | 2013-10-09 | 株式会社デンソー | 照明装置 |
| WO2011061914A1 (ja) * | 2009-11-19 | 2011-05-26 | パナソニック株式会社 | 走査型画像表示装置 |
| JP2012032721A (ja) * | 2010-08-02 | 2012-02-16 | Nippon Seiki Co Ltd | 表示装置 |
-
2013
- 2013-01-23 DE DE102013001097.7A patent/DE102013001097A1/de not_active Ceased
- 2013-08-09 JP JP2015525902A patent/JP2015531083A/ja active Pending
- 2013-08-09 WO PCT/EP2013/066725 patent/WO2014023830A1/de not_active Ceased
- 2013-08-09 US US14/420,478 patent/US9541760B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| FAN CHAO ET AL: "Development of a micromirror based laser vector scanning automotive HUD", MECHATRONICS AND AUTOMATION (ICMA), 2011 INTERNATIONAL CONFERENCE ON, IEEE, 7 August 2011 (2011-08-07), pages 75 - 79, XP032019603, ISBN: 978-1-4244-8113-2, DOI: 10.1109/ICMA.2011.5985634 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US9541760B2 (en) | 2017-01-10 |
| DE102013001097A1 (de) | 2014-02-13 |
| US20150212321A1 (en) | 2015-07-30 |
| JP2015531083A (ja) | 2015-10-29 |
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