GB2368403A - Head-up displays - Google Patents

Head-up displays Download PDF

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Publication number
GB2368403A
GB2368403A GB0026222A GB0026222A GB2368403A GB 2368403 A GB2368403 A GB 2368403A GB 0026222 A GB0026222 A GB 0026222A GB 0026222 A GB0026222 A GB 0026222A GB 2368403 A GB2368403 A GB 2368403A
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GB
United Kingdom
Prior art keywords
head
combiner
up display
image
vehicle
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.)
Granted
Application number
GB0026222A
Other versions
GB0026222D0 (en
GB2368403B (en
Inventor
Jan-Erik Kallhammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autoliv Development AB
Original Assignee
Autoliv Development AB
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Filing date
Publication date
Application filed by Autoliv Development AB filed Critical Autoliv Development AB
Priority to GB0026222A priority Critical patent/GB2368403B/en
Publication of GB0026222D0 publication Critical patent/GB0026222D0/en
Publication of GB2368403A publication Critical patent/GB2368403A/en
Application granted granted Critical
Publication of GB2368403B publication Critical patent/GB2368403B/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Other optical systems; Other optical apparatus
    • G02B27/01Head-up displays
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Other optical systems; Other optical apparatus
    • G02B27/01Head-up displays
    • G02B27/0101Head-up displays characterised by optical features
    • G02B2027/0118Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Other optical systems; Other optical apparatus
    • G02B27/01Head-up displays
    • G02B27/0101Head-up displays characterised by optical features
    • G02B2027/0138Head-up displays characterised by optical features comprising image capture systems, e.g. camera
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Other optical systems; Other optical apparatus
    • G02B27/01Head-up displays
    • G02B27/0101Head-up displays characterised by optical features
    • G02B2027/014Head-up displays characterised by optical features comprising information/image processing systems
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G02F1/13318Circuits comprising a photodetector

Abstract

In a head-up display for a motor vehicle, a combiner (9) is provided mounted on the windscreen (10) of the vehicle. The combiner enables an optical combination to be produced which is a combination of an image viewed through the windscreen and an image projected on to the combiner. The combiner (9) comprises at least one region (14) in which the optical transmission characteristic of the combiner may be adjusted. Control means (15) are provided to adjust the optical transmission characteristics of the region.

Description

"IMPROVEMENTS IN OR RELATING TO A HEAD-UP DISPLAY" THE PRESENT INVENTION relates to a head-up display for a motor vehicle.

Previously it has been proposed (see US-A-5,414, 439) to use a head-up display in a motor vehicle wherein an image or images are projected onto a combiner incorporated in the windscreen of the vehicle, which is in the field of view of the driver of the vehicle. The projected image is displayed on the combiner at a distance in front of the driver of the vehicle, and in his line of sight such that the driver of the vehicle may view the image while also viewing the road in front of the vehicle.

One problem that can arise with the previously proposed arrangement is that, during bright daylight conditions when the driver of the vehicle may be subjected to high exterior ambient light level or"glare", the combiner may appear to be substantially transparent and any head-up images transmitted therethrough may be difficult to distinguish, from the high ambient light level or"glare"by the occupant of the vehicle. Ideally, a combiner should enable the projected image to be seen, regardless of the conditions outside the vehicle, and should also provide at least an adequate image of the road when required.

The present invention seeks to provide an improved head-up display for a motor vehicle.

According to the present invention there is provided a head-up display for a motor vehicle, the head-up display comprising a combiner adapted to be mounted in the field of view of a driver of the vehicle, an image generator arrangement to generate an image and to transmit the image onto the combiner, the combiner comprising at least one region wherein the optical transmission characteristic of the combiner may be adjusted, control means being provided to adjust the optical transmission characteristic of the region.

Conveniently, the image generator arrangement is a projector.

Preferably, the combiner comprises two said regions.

Conveniently, one of said regions is substantially smaller than the other said region.

Preferably, the optical transmission characteristic of the two regions are independently adjustable.

Conveniently, a light detector is provided adapted to detect ambient light conditions on the exterior of the vehicle and to provide a signal to the control means, the control means controlling the optical transmission characteristic of at least one said region in response to said signals.

Preferably, the head-up display further comprising a camera, the camera being adapted to send signals representative of an image to the image generator arrangement.

Advantageously, the camera is an infra-red or heat detecting camera.

Conveniently, the camera is adapted to be mounted on the front of the vehicle.

Preferably, the camera is adapted to be mounted on the rear of the vehicle.

Advantageously, sensor means are provided to sense when reverse gear is selected and to send a signal to the control means, the control means activating the camera adapted to be mounted on the rear of the vehicle, the signals representative of the image received by said camera being sent to the image generator arrangement to generate an image.

Conveniently, the control means is adapted to receive a signal from a control switch.

Preferably, the control switch is adapted to control a global positioning and navigation system.

Advantageously, the global positioning and navigation system is adapted to send signals representative of an image to the image generator arrangement to generate an image to be transmitted onto the combiner.

When the reverse camera is actuated or when the global positioning and navigation system is activated, the image generator may transmit an image from the camera on the front of the vehicle onto the larger region and anther image, such as the image from the rear view camera or the image from the global positioning and navigation system onto the smaller region of the combiner.

Preferably the image generator and combiner are adjustably positionable. The image generator and combiner may form part of an integral unit, and the position of the whole unit may be adjusted. Alternatively the combiner may be mounted, for example, on the windscreen of a vehicle, and the image generator may be adjustably positionable relative to the combiner.

Conveniently, the control means is adapted to adjust the optical transmission characteristic of the or each region to be substantially opaque when high levels of ambient light are detected.

Preferably, the control means is adapted to adjust the optical transmission characteristic of the or each region to be substantially transparent when low levels of ambient light are detected.

The invention relates to the head-up display when mounted in a motor vehicle.

In order that the invention may be more readily understood, and so that further features thereof may be appreciated, the invention will now be described, by way of example, with reference to the accompanying drawings in which: FIGURE 1 is a side view of a motor vehicle incorporating a head-up display in accordance with the invention; FIGURE 2 is a side view of the head-up display of Figure 1; FIGURE 3 is a front view showing the combiner of the head-up display of Figure 2 and part of the windscreen of the vehicle; FIGURE 4 is a block diagram of the head-up display of Figures 1 to 3; FIGURE 5 is a diagrammatic perspective view of the motor vehicle of Figure 1 showing the motor vehicle in a particular situation; FIGURE 6 is a view of the combiner of the head-up display, as seen by the driver of the vehicle of Figure 5, with the combiner in a first condition; FIGURE 7 is a view corresponding to Figure 6 showing the combiner in a second condition; FIGURE 8 is a view corresponding to Figure 7 showing the combiner in a third condition; FIGURE 9 is a view corresponding to Figure 8 showing the combiner in a fourth condition; and FIGURE 10 is a view corresponding to Figure 9 showing the combiner in a fifth condition.

Referring initially to Figure 1, a motor vehicle 1 is shown incorporating a head-up display 2 located within the cabin of the vehicle, a forward facing camera 3 mounted on the front of the vehicle and a rearward facing camera 4 mounted on the rear of the vehicle. The cameras may be any type of camera that converts an image to an electronic signal which is representative of the image, such as a camera that incorporates a charge coupled device. The camera may be sensitive to light in the visible part of the spectrum but, for the forward facing camera 3 at least, it is envisaged that an infra-red or heat-detecting camera would be used. The camera may include one or more micro-bolometers responsive to sensed radiation levels. Such a camera can provide valuable images when it is dark or when it is foggy.

Referring now to Figure 2, the head-up display 2 comprises an image generator arrangement in the form of a projector 5. The projector 5 is adapted to receive a signal from one or both of the cameras 3 and 4, and to generate, for example by means of a liquid crystal unit, an optical image which is the image projected by the projector 5. The projector, in use, emits a horizontal beam of light which passes through a focusing lens 6 mounted on a horizontal support element 7. The beam of light is directed to an inclined mirror 8 mounted on the support element 7, and is reflected upwardly to be focused onto a combiner 9 that is mounted on part of the described unit, in this case the housing for the focusing lens 6. In an alternative embodiment the combiner 9 may be mounted on, or formed integrally with part of the windscreen 10 of the motor vehicle 1.

In either event the combiner 9 is adjacent the inside of the windscreen 10 and is located in the ordinary line of sight of the driver I I of the vehicle 1. The arrowed lines 12 show the path of the light beam from the projector 5 to the combiner 9. In other embodiments the lens 6 may be omitted.

Signals representing an image from either the forward facing camera 3 or the rearward facing camera 4, may be sent to the projector 5 which projects the image onto the mirror 8. It is envisaged that the head-up display 2 may be adjustable, for example by adjusting the angle of tilt of the mirror 8, or by tilting the whole unit around a pivot point such that the image may be transmitted from the mirror 8 to different sections of the combiner 9 to account for different drivers of the motor vehicle 1 being of different sizes. Of course, the line of sight of a tall driver is typically at a higher level than the line of sight of a short driver.

The combiner 9 is formed so that the optical transmission characteristics of the combiner may be adjusted. The combiner permits light from the exterior of the vehicle to enter the vehicle and be directed towards the eyes of the driver. The combiner also forms a"screen"on to which the image from the projector is projected. Thus, the combiner should be at least partially transparent, in order to permit light from outside the vehicle to enter the vehicle, but also should be at least partially opaque to form a"screen"capable of displaying the projected image. The optical transmission characteristic of the combiner is a measure of the transparency or opaqueness of the combiner.

Because, in the present invention, the optical transmission characteristic is variable, the degree of transparency or opaqueness may be adjusted so that the head-up display may operate in an optimum manner with different types of external conditions and intended use of the display.

In the presently described embodiment, the combiner 9 is of a laminated form, and is provided with at least one layer of liquid crystal material located between two transparent layers, the transparent layers being provided with transparent electrodes on the surfaces thereof adjacent the liquid crystal material. The liquid crystal material contains elements which will change orientation in response to a change in an electric signal applied across the electrodes. The orientation of the liquid crystals of the combiner 9 controls how much light is permitted to pass through the combiner 9. Thus, by adjusting the electric signal applied across the electrodes, the optical transmission characteristic of the combiner may be adjusted. Liquid crystal arrangements of this type have been proposed for use in various contexts, such as display devices and welder's masks. Reference may be made to WO 95/29428 which discloses one type of liquid crystal device.

In use of the described combiner 9, the optical transmission characteristic of the combiner 9 may be adjusted from a relatively high opacity, where very little light passes through the combiner 9, to a very low opacity, where a relatively high amount of light passes through the combiner 9. It is envisaged that the optical transmission characteristic of the combiner may be adjusted through a range of opacities ranging from approximately 20% to approximately 80% opacity.

Referring now to Figure 3, the combiner 9 is shown located in the windscreen 10. The combiner 9 is of rectangular form and has two discrete regions 13 and 14, the optical transmission characteristic of which may be adjusted independently of one another, as will be described later in the description. The first region 13 is generally rectangular, save for a small rectangular cut-out at the top right-hand comer which accommodates the second region 14. However, it is to be appreciated that the second region 14 may occupy any position adjacent the first region 13 of the combiner 9 or may even be at a separate location within the combiner 9.

In ordinary use of the described arrangement, an image from the front camera 3 will be projected onto both the regions 13 and 14 of the combiner.

However, different images may be projected, as will be described.

Referring now to Figure 4, the combiner 9 is connected to control means 15, for example a logic board or microprocessor.

The control means 15 is adapted to adjust the optical transmission characteristic of both the first region 13 and the second region 14 of the combiner 9. As will be further described, this adjustment may be to one of regions 13 or 14 independently, or to both regions 13 and 14 simultaneously.

The control means 15 is adapted to provide said adjustment of regions 13 and 14 in dependence upon one or more of a number of signals which are supplied to the control means 15.

A first signal may be sent to the control means 15 from a light detector 16, which optionally incorporates a fog detector, which is mounted to detect the ambient light level on the exterior of the vehicle 1, or to detect the presence of mist or fog. It is to be appreciated that a variety of different types of light detector 16 may be used, including for example, a photoelectric cell. It is to be noted that the adjustment of the optical transmission characteristic of the regions 13 and 14 of the combiner 9 by the control means 15 will vary in dependence upon the signal received from the light detector 16. Thus, in very bright ambient conditions, the optical transmission characteristic may be adjusted so that the combiner 9 is quite opaque. This will reduce the intensity of light from the exterior of the vehicle 1, while improving the intensity of the image projected onto the combiner 9 enabling the driver 11 to see both the scene on the exterior of the vehicle 1 and the projected image. In low light level ambient conditions for example, at night, the optical transmission characteristic may be adjusted so that the combiner 9 is substantially transparent, to enable the driver 11 to see the scene outside the vehicle 1 clearly. Only a small degree of opacity is required in such conditions for the projected image to be clearly visible.

The detector 16 may include components to detect fog such as a laser and means to measure the intensity of reflected laser light. If fog is detected, especially during daylight conditions, the combiner maybe adjusted so that it is very opaque to enhance the projected image.

A second signal or set of signals may be sent to the control means 15 from a control switch 17. The control switch 17 is a multi-function control switch. A first function of the control switch 17 is to enable the driver 11 to effect a manual adjustment of the optical transmission characteristic of the combiner 9. This may be desirable if, for example, the driver 11 should encounter foggy conditions, and there is no fog detector. Also the control switch 17 is adapted to actuate a global positioning and navigation system 18, as is well known in the art. When the global positioning and navigation system 18 is activated, the system will send, to the projector 5, signals representative of a supplementary image to be projected, which supplements the main image from the forward facing camera 3. The projector 5 is controlled, by the control means 15, to project the supplementary image onto the relatively small second region 14 of the combiner 9. Of course, the image from the front camera 3 may still be projected onto the first region 13.

A third signal may be sent to the control means 15 from a rear gear detector 19 indicating that the rear gear has been selected by the driver 11 of the motor vehicle 1. It is envisaged that the rear gear detector 19 may be for example, a contact switch, the switch being closed, and therefore generating the signal, when the gear stick of the motor vehicle 1 is moved into the rear gear gate by the driver 11 of the motor vehicle 1.

When the rear gear has been selected, the rearward facing camera 4 of the motor vehicle 1 will be activated and a signal representative of the image received by the rearward facing camera 4 is sent to the projector 5 of the headup display 2. This image may be projected onto the combination of the regions 13 and 14, thus superseding the image from the front camera 3, but in this embodiment the image from the rearward facing camera 4 is projected, in the form of a supplementary image, onto the small region 14, while the main image from the front camera 3 is projected onto the region 13.

Whenever an image is projected onto the small region 14 which is not part of an image projected onto the region 13 (for example, when the global positioning and navigation system 18 or the rearward facing camera 4 is activated), the optical transmission characteristic of the region 14 may be adjusted to make it substantially opaque so that the projected image is visible regardless of the ambient light conditions on the exterior of the vehicle.

It is to be noted that the control means 15 may adjust the optical transmission characteristic of either one of or both the regions 13 and 14 of the combiner 9 in dependence upon receiving one or more of the signals generated by the light detector 16, the control switch 17 or the rear gear detector 19.

Referring now to Figure 5, the motor vehicle 1 is shown in a position on a road 20. The forward facing camera 3 is shown at the front of the motor vehicle 1 and the rearward facing camera 4 is shown at the rear of the vehicle 1.

The lines 21 represent the field of view of the forward facing camera 3. The lines 22 represent the field of view of the rearward facing camera 4. Thus, when the motor vehicle 1 is in the particular position shown, the forwardly facing camera 3 will detect two people 23 and a tree 24, whilst the rearward facing camera 4 will detect a dog 25.

Referring now to Figure 6, the combiner 9 is shown in a substantially transparent condition. It is envisaged that the optical transmission characteristic of the combiner 9 will be adjusted by the control means 15 to this substantially transparent condition when relatively little light is detected by the light detector 16, for example at night. The forward facing camera 3 will detect the two humans 23 and the tree 24 and these images will be focused onto the <img class="EMIRef" id="024185818-00120001" />

<tb> combiner <SEP> 9 <SEP> so <SEP> as <SEP> to <SEP> be <SEP> visible <SEP> to <SEP> the <SEP> driver <SEP> 11 <SEP> of <SEP> the <SEP> vehicle <SEP> 1. <SEP> Because <SEP> the <tb> combiner <SEP> 9 <SEP> is <SEP> substantially <SEP> transparent, <SEP> the <SEP> driver <SEP> 11 <SEP> will <SEP> also <SEP> be <SEP> able <SEP> to <SEP> see <SEP> the <tb> scene outside the vehicle 1. However, if the forward facing camera 3 detects an image which cannot actually be seen by the driver 11, such as a person beyond the range of the headlights but emitting sufficient heat to be detected by the forward facing camera 3, the driver 11 will see the projected image of that person, before the person actually becomes visible within the scene outside the vehicle 1.

Referring now to Figure 7, the combiner 9 is shown in a substantially opaque condition. It is envisaged that the optical transmission characteristic of both regions 13 and 14 of the combiner 9 will be adjusted by the control means 15 to the substantially opaque condition when a signal received from the light detector 16 indicates that the light is relatively bright. Thus, in these conditions, the high ambient external light levels or"glare"from the relatively bright light will be reduced and the driver 11 of the vehicle 1 will be able to view the road ahead relatively easily, as well as seeing the image projected onto the combiner 9 of the projector 5. It is further envisaged that the optical transmission characteristic of the combiner 9 may be adjusted automatically or by use of the control switch 17 to the substantially opaque condition during foggy conditions, especially in daylight, when normal visibility in front of the vehicle will be relatively low. This will enhance the projected image. The fact that the driver cannot directly see the road outside the vehicle 1 because of the opaque combiner will not be of major concern, since the scene on the exterior of the vehicle is simply fog, the driver cannot, in any event, see the road.

Referring now to Figure 8, the combiner 9 is shown with the first region 13 in a substantially transparent condition, and the second region 14 in a substantially opaque condition. It is to be appreciated that the optical transmission characteristic of these regions will be adjusted in this way when the control means 15 receives a signal from the light detector 16 indicating a low level of ambient light on the exterior of the vehicle and also receives a signal from the control switch 17 when the global positioning and navigation system is activated. The control means 15 controls the projector 5 so that the image from the forward facing camera 3 is focused on the first substantially transparent region 13 of the combiner 9 and the image generated by the global positioning and navigation system 18 will be focused onto the substantially opaque second region 14 of the combiner 9.

It is to be appreciated that, in this case, the image from the global positioning and navigation system 18 will therefore be clearly distinguishable, by the driver 11, from the image detected by the forward facing camera 3.

Referring now to Figure 9, the combiner 9 is shown when reverse gear has been selected during darkness with the first region 13 in a substantially transparent condition, and the second region 14 in a substantially opaque condition. The image focused onto the first region 13 of the combiner 9 is that of the image received by the forward facing camera 3, and the image focused onto the second region 14 of the combiner 9 is that of the image received by the rearward facing camera 4.

Thus, the driver 11 of the vehicle 1, when reverse gear has been selected, will have a clear view of the road behind the vehicle 1 focused by the second region 14 of the combiner 9 into his forward line of sight.

Referring now to Figure 10, the combiner 9 is shown when reverse gear has been selected in daylight. The optical transmission characteristics of the first region 13 and the second region 14 have both been adjusted by the control means 15 to be substantially opaque. Thus the image focused onto the first region 13 of the combiner 9 is that received by the forward facing camera 3 and the image focused on the second region 14 of the combiner 9 is that received by the rear facing camera 4.

In the described embodiment, a projector 5 is used as an image generator. In an alternative embodiment, a simple display screen, such as a cathode ray display, may be used with the display screen being located so that a reflection thereof is visible to the driver in the combiner.

In embodiments of this invention the optical transmission characteristics of one or both regions 13 and 14 of the combiner 9 may be adjusted so that the proportion of the external light that can pass through the combiner 9 is reduced as the intensity of the light increases, so that the intensity of the light entering the vehicle 1 through the combiner 9 is substantially balanced with the intensity of the image projected onto the combiner 9, so that the driver 11 can readily see the scene on the exterior of the vehicle 1 and also the projected image. The projected image from the front camera, or the rear camera, or the navigation system may cover the combination of both regions 13 and 14, or maybe present on only one region 13 or 14.

In the present specification"comprise"means"includes or consists of and"comprising"means"including or consisting of.

The features disclosed in the foregoing description, or the following Claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately, or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

Claims (19)

  1. CLAIMS: 1. A head-up display for a motor vehicle, the head-up display comprising a combiner adapted to be mounted in the field of view of a driver of the vehicle, an image generator arrangement to generate an image and to transmit the image onto the combiner, the combiner comprising at least one region wherein the optical transmission characteristic of the combiner may be adjusted, control means being provided to adjust the optical transmission characteristic of the region.
  2. 2. The head-up display of Claim 1, wherein the image generator arrangement is a projector.
  3. 3. The head-up display of Claim 1 or Claim 2, wherein the combiner comprises two said regions.
  4. 4. The head-up display of Claim 3 where one of said regions is substantially smaller than the other said region.
  5. 5. The head-up display of Claim 3 or Claim 4, wherein the optical transmission characteristic of the two regions are independently adjustable.
  6. 6. The head-up display of any one of the preceding claims, wherein a light detector is provided adapted to detect ambient light conditions on the exterior of the vehicle and to provide a signal to the control means, the control means controlling the optical transmission characteristic of at least one said region in response to said signals.
  7. 7. The head-up display of any one of the preceding claims further comprising a camera, the camera being adapted to send signals representative of an image to the image generator arrangement.
  8. 8. The head-up display of Claim 7 wherein the camera is an infra-red or heat detecting camera.
  9. 9. The head-up display of Claim 7 or Claim 8, wherein the camera is adapted to be mounted on the front of the vehicle.
  10. 10. The head-up display of Claim 7 or Claim 8, wherein the camera is adapted to be mounted on the rear of the vehicle.
  11. 11. The head-up display of Claim 10, wherein sensor means are provided to sense when reverse gear is selected and to send a signal to the control means, the control means activating the camera adapted to be mounted on the rear of the vehicle, the signals representative of the image received by said camera being sent to the image generator arrangement to generate an image.
  12. 12. The head-up display of any of the preceding claims, wherein the control means is adapted to receive a signal from a control switch.
  13. 13. The head-up display of Claim 12 wherein the control switch is adapted to control a global positioning and navigation system.
  14. 14. The head-up display of Claim 13, wherein the global positioning and navigation system is adapted to send signals representative of an image to the image generator arrangement to generate an image to be transmitted onto the combiner.
  15. 15. The head-up display of Claim 11 or Claim 14 as dependant on Claim 4 and Claim 9 wherein, in use, the image generator transmits an image from the camera on the front of the vehicle onto the larger region, and another image onto the smaller region of the combiner.
  16. 16. Head-up display according to any one of the preceding Claims wherein the image generator and the combiner are adjustably positionable.
  17. 17. A head-up display substantially as herein described with reference to and as shown in the figures.
  18. 18. A head-up display according to any one of the preceding Claims when mounted in a motor vehicle.
  19. 19. Any novel feature or combination of features disclosed herein.
GB0026222A 2000-10-26 2000-10-26 Improvements in or relating to a head-up display Active GB2368403B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0026222A GB2368403B (en) 2000-10-26 2000-10-26 Improvements in or relating to a head-up display

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0026222A GB2368403B (en) 2000-10-26 2000-10-26 Improvements in or relating to a head-up display
AU9615601A AU9615601A (en) 2000-10-26 2001-10-18 A head-up display for a motor vehicle
PCT/SE2001/002272 WO2002035276A1 (en) 2000-10-26 2001-10-18 A head-up display for a motor vehicle

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GB0026222D0 GB0026222D0 (en) 2000-12-13
GB2368403A true GB2368403A (en) 2002-05-01
GB2368403B GB2368403B (en) 2004-04-28

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GB (1) GB2368403B (en)
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WO2007020158A1 (en) * 2005-08-18 2007-02-22 Siemens Vdo Automotive Ag Display system for a motor vehicle
WO2008109231A2 (en) * 2007-03-05 2008-09-12 The Boeing Company Electrically dimmable combiner optics for head-up display
US7450294B2 (en) 2004-03-12 2008-11-11 Boeing Co Multi-color electrochromic apparatus and methods
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US8032264B2 (en) 1999-12-15 2011-10-04 Automotive Technologies International, Inc. Vehicular heads-up display system
US8686922B2 (en) * 1999-12-15 2014-04-01 American Vehicular Sciences Llc Eye-location dependent vehicular heads-up display system
US8818647B2 (en) 1999-12-15 2014-08-26 American Vehicular Sciences Llc Vehicular heads-up display system
EP3031654A1 (en) * 2014-12-10 2016-06-15 Valeo Schalter und Sensoren GmbH Display apparatus for a motor vehicle comprising a screen device, driver assistance system, motor vehicle and method
WO2016205503A1 (en) * 2015-06-16 2016-12-22 Gentex Corporation Heads up display system
DE102017217193A1 (en) * 2017-09-27 2019-03-28 Audi Ag Display device, in particular for a vehicle, and vehicle with such a display device

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