WO2024022797A1 - Affichage tête haute pour véhicule automobile et dispositif de génération d'image pour un affichage tête haute - Google Patents

Affichage tête haute pour véhicule automobile et dispositif de génération d'image pour un affichage tête haute Download PDF

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Publication number
WO2024022797A1
WO2024022797A1 PCT/EP2023/069098 EP2023069098W WO2024022797A1 WO 2024022797 A1 WO2024022797 A1 WO 2024022797A1 EP 2023069098 W EP2023069098 W EP 2023069098W WO 2024022797 A1 WO2024022797 A1 WO 2024022797A1
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WO
WIPO (PCT)
Prior art keywords
light
display
head
micro
optical element
Prior art date
Application number
PCT/EP2023/069098
Other languages
German (de)
English (en)
Inventor
Eckhard Finger
Francois Grandclerc
Original Assignee
Valeo Schalter Und Sensoren Gmbh
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Filing date
Publication date
Application filed by Valeo Schalter Und Sensoren Gmbh filed Critical Valeo Schalter Und Sensoren Gmbh
Publication of WO2024022797A1 publication Critical patent/WO2024022797A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G02B19/0066—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED in the form of an LED array
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • B60K35/234—Head-up displays [HUD] controlling the brightness, colour or contrast of virtual images depending on the driving conditions or on the condition of the vehicle or the driver
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/23—Optical features of instruments using reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/33—Illumination features
    • B60K2360/334—Projection means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/33—Illumination features
    • B60K2360/349—Adjustment of brightness
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/10—Automotive applications
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/002—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2003—Display of colours

Definitions

  • the invention relates to a head-up display for a motor vehicle, an image generating device for such a head-up display and a motor vehicle with such a head-up display.
  • At least one head-up display can be arranged in a motor vehicle, for example in a front area of the motor vehicle.
  • a virtual image can be displayed in a projection plane, which is arranged behind a windshield of the motor vehicle and thus outside the motor vehicle, for example, viewed from a driver.
  • the displayed virtual image can, for example, describe additional information regarding a current route and/or an environment of the motor vehicle.
  • the additional information displayed can be used to inform the driver, for example, about an upcoming turning maneuver, a currently applicable speed limit or other driving-relevant information.
  • the head-up display should have a large variability in terms of brightness, since, for example, in the dark, for example when driving at night or driving in a tunnel, the brightness of the head-up display compared to operation of the head-up display Displays should be dimmed when there is comparatively much light, for example when driving during the day. Therefore, the head-up display can have at least two different brightness modes, which can be referred to, for example, as dark mode and normal mode or light mode. For example, in dark mode you may want a brightness of around 3 candela per square meter and in light mode at least around 15,000 candela per square meter.
  • the head-up display should therefore be designed to be able to provide a relatively large brightness range, that is to say to be able to control the illumination intensity of an image generating device of the head-up display in such a large value range.
  • the US 11,209,646 B2 shows a head-up display with a light source, a diffuser, a transmitting display, a mirror element and a transmitting screen.
  • the head-up display has a contrast-enhancing display that is arranged adjacent to the transmitting display.
  • the DE 10 2019 201 055 A1 shows an imaging unit for a device for displaying an image.
  • the imaging unit has a matrix of light sources and a spatial light modulator for selecting individual solid angle elements of the light emitted by the light sources.
  • the object of the invention is to provide a solution by means of which the lighting intensity of a head-up display can be reliably adjusted.
  • a first aspect of the invention relates to a head-up display for a motor vehicle.
  • a head-up display is a display system in which at least one piece of information is projected into a user's field of vision in the form of a virtual image. The user can therefore maintain a current viewing direction and thus a current head position and still see the displayed virtual image.
  • the virtual image is typically displayed in such a way that it is superimposed on an environment of the motor vehicle and is, for example, at least partially displayed on an object in the environment.
  • the head-up display has an image generating device with a matrix of microlight-emitting diodes.
  • the image generating device is often referred to as a Picture Generating Unit (PGU).
  • PGU Picture Generating Unit
  • the head-up display has an imaging unit that can be designed as a display area, that is, for example, as a screen or display.
  • the head-up display is designed to generate a virtual image in a projection plane arranged outside the head-up display.
  • the matrix of micro-light-emitting diodes represents a light source of the image-generating device.
  • the image-generating device therefore comprises a self-emitting display, which is formed by means of a pixel structure of individual light-emitting diodes.
  • microLED micro light-emitting diodes
  • MLED microLED
  • mLED mLED
  • pLED LED for light emitting diode
  • Micro-light-emitting diodes have, among other things, the advantage that: In comparison to LEDs, for example, the virtual image can be generated particularly precisely, so that it can be displayed in particularly colorful and high resolution, for example.
  • the matrix of the image generating device has numerous microlight-emitting diodes, which are arranged next to one another, for example.
  • the image generating device thus has, for example, a first layer which comprises the matrix with the microlight-emitting diodes, and the optical element arranged above the matrix in a vertical direction of the image generating device.
  • the optical element preferably covers all of the micro-light-emitting diodes of the matrix, so that the light emitted by each individual micro-light-emitting diode must be transmitted through the optical element in order to be able to exit the image generating device.
  • the optical element is designed as a liquid crystal element, liquid crystal display or electrochromic element.
  • the optical element is designed to adjust an illumination intensity of the image generating device.
  • the liquid crystal element can alternatively be referred to as a liquid crystal cell, that is to say as an LC cell (LC for Liquid Cristal).
  • the liquid crystal display can be referred to as a liquid crystal display (LCD).
  • the LC cell and LCD contain at least one linear-polarizing element on the front and back.
  • the liquid crystal element and the liquid crystal display are based on quasi-liquid crystal chains, which, depending on the applied voltage, rotate a polarization direction of incoming light and can thus change and, above all, reduce the brightness of the light.
  • the electrochromic element is, for example, an electrochromic glass, which can alternatively be referred to as intelligent or dynamic glass.
  • the electrochromic element can be colored, for example, by applying an electric current, whereby a brightness of the light radiated onto the electrochromic element is reduced as it is transmitted through, so that the light emerging from the electrochromic element is less bright than before.
  • the electrochromic element is therefore suitable for controlling the illumination intensity of light. In other words, targeted control of the optical element can ensure that the brightness of the light emitted by the image generating device can at least be reduced in comparison to the light emitted by the micro-light-emitting diodes within the image generating device.
  • the optical element can be arranged as an individual component above the matrix of micro-light-emitting diodes or can be integrated into the assembly of the micro-light-emitting diodes and thus the matrix.
  • the optical transmission of the optical element can be controlled electronically, for example by means of a control device of the head-up display. This makes it possible to provide a dimming function for the head-up display, with the illumination intensity of the light that leaves the image generating device of the head-up display on a side of the optical element facing away from the matrix being adjustable. So no other components are needed other than the matrix and the optical element.
  • the additional optical element increases the possible light intensity range over which the illumination intensity can be adjusted compared to an image generating device without an optical element. Since the optical element is adjustable, the lighting intensity of the head-up display can always be set reliably.
  • the image generating device is designed to provide a light mode, alternatively referred to as day mode, and/or a dark mode, alternatively referred to as night mode, by controlling the optical element.
  • the optical element is therefore preferably controlled at least over a light intensity range of 3 to 15,000 candelas per square meter. It is possible, for example based on a brightness detection sensor of the motor vehicle, to adjust the illumination intensity of the image generating device, that is to say to switch between the two modes. Any number of intermediate modes can be provided between light mode and dark mode. This makes it clear over which illumination intensity range the control by means of the optical element should extend, since variations are not only desired in a small illumination intensity range, but the head-up display is designed for both maximally bright and minimally bright lighting conditions in the area surrounding the motor vehicle should be.
  • the light mode is always set when no additional reduction in illumination intensity is specified by means of the optical element, and the dark mode, for example, when the illumination intensity reduction is set to a maximum by means of the optical element.
  • the illumination intensity can be adjusted by applying an external voltage and/or an external current to the optical element.
  • the image generating device or the head-up display has the control device for this purpose, by means of which the optical element can be controlled.
  • the properties of the optical element are adjusted by means of the voltage or current in such a way that the intensity of the light emitted by micro-light-emitting diodes is reduced by a desired factor and thus adjusted to the desired illumination intensity.
  • Particularly simple control methods can therefore be used to adjust the illumination intensity of the image generating device as desired.
  • the optical element is formed from a single cell or has several cells. So either a one-piece optical element can be provided or it can be composed of several individual components, that is to say several cells.
  • This makes it possible, for example, to adapt a shape of the optical element to a shape of the matrix of microlight-emitting diodes. If, for example, the matrix is curved or curved, for example step-shaped or s-shaped, the surface of the matrix of micro-light-emitting diodes can still be reliably covered by the optical element by dividing the optical element into several cells, if the shape of the multiple cells is determined Matrix is modeled.
  • the multiple cells can each be controlled individually or together. It is therefore possible, for example, for the lighting intensity to be changed locally differently. This makes it possible, for example, to create partial areas of the generated virtual image that have a higher brightness than other partial areas. This can be interesting, for example, if the projection plane is partially shaded, so that at the same time part of the virtual image should be displayed in light mode and another part in dark mode.
  • the transmission of light through the respective cell of the optical element is therefore optionally controlled individually by means of the control device.
  • a separate control device can be provided for each cell. This means that the lighting intensity can not only be adjusted globally, but can also be selected to be variable locally.
  • the micro-light-emitting diodes are at least partially combined into individual pixels, with each pixel having at least one red, one green and one blue-lighting micro-light-emitting diode.
  • a red, green or blue micro-light-emitting diode is a micro-light-emitting diode that emits light in the red, green or blue wavelength range. This ensures that a colorful virtual image can be provided using the micro-light-emitting diodes.
  • the respective pixel can be composed of more micro-light-emitting diodes than the three micro-light-emitting diodes mentioned.
  • the individual micro-light-emitting diodes can be viewed as subpixels of the image-generating device, which only form one pixel of numerous pixels of the image-generating device as a group of at least three micro-light-emitting diodes. This allows a reliable color display to be achieved using the head-up display.
  • the micro-light-emitting diodes are at least partially designed as ultraviolet light-emitting diodes and a converter is arranged on each ultraviolet light-emitting diode in order to convert the light emitted by the respective ultraviolet light-emitting diode into different colored light in the visible wavelength range.
  • a converter is arranged on each ultraviolet light-emitting diode in order to convert the light emitted by the respective ultraviolet light-emitting diode into different colored light in the visible wavelength range.
  • ultraviolet micro-light-emitting diodes can be used, the light of which is converted into blue, green or red light by the converters.
  • blue-luminous micro-light-emitting diodes can be provided, with red or green light being able to be generated from the blue light using appropriate converters.
  • the respective converter can be realized by applying a converting material to the respective micro-light-emitting diode.
  • the converter depends on the color to be generated, with at least one micro-light-emitting diode that lights up red, green and blue being provided by the converter for each pixel.
  • the matrix of micro-light-emitting diodes can be selected in a variety of ways, A color display is still reliably achieved using the head-up display.
  • the image generating device is designed to determine a color of the light that is emitted by the respective micro-light-emitting diode and/or a respective pixel by means of pulse wave modulation or by applying a current to the respective micro-light-emitting diode or to the respective micro-light-emitting diodes of the pixel.
  • a color tone can be adjusted using the micro-light-emitting diodes that provide red, green or blue light by carrying out pulse wave modulation or by applying the current. This increases or decreases the intensity of individual colors and the mixture of at least three colors determines the color tone of the pixel. This allows intermediate color levels between red, green and blue, i.e.
  • micro-light-emitting diodes are typically dimmed in intensity, that is, their illumination intensity is controlled individually, which ultimately influences the illumination intensity of the entire image generating device.
  • change between light and dark mode i.e. the large-scale adjustment of the illumination intensity
  • an exemplary embodiment provides that the image generating device is designed to control the illumination intensity of the light emitted by the respective micro-light-emitting diode and/or a respective pixel by means of pulse wave modulation or by applying a current to the respective micro-light-emitting diode or the respective micro-light-emitting diodes Adjust pixels to at least contribute to adjusting the illumination intensity of the image generating device. So it is generally through the local control of the individual micro-light-emitting diode, i.e. the Microlight-emitting diodes, each viewed alone or in groups of pixels, are also possible to at least influence the overall brightness for setting the light and dark mode provided, for example.
  • the contribution at the level of the micro-light-emitting diodes that is to say using pulse wave modulation and the applied current, can be small compared to the contribution of the optical element.
  • a redundant pulse wave modulation and application of the current can therefore be provided. This ultimately further refines the provision of light and dark modes.
  • an exemplary embodiment provides that, if the optical element is designed as a liquid crystal element or liquid crystal display, it has a liquid crystal layer which is surrounded on both sides by a glass carrier layer, to which a polarizing thin layer adjoins on a side facing away from the liquid crystal layer.
  • a relatively simple structure of the liquid crystal element or liquid crystal display can therefore be used to realize the optical element.
  • the intensity of the light leaving the optical element can be adjusted by appropriately controlling the liquid crystal element or the liquid crystal display. This makes a particularly cost-effective optical element possible because liquid crystal elements or liquid crystal displays can be used.
  • the matrix of microlight-emitting diodes is arranged on a carrier.
  • the carrier is designed in particular as a film or as a plate.
  • the carrier is preferably made of plastic, that is to say in particular as a plastic film.
  • the carrier is a component of the device that is arranged below the matrix, that is to say on a side of the matrix that faces away from the optical element and a main radiation direction of the microlight-emitting diodes.
  • the carrier can have a cooling element on a side facing away from the matrix.
  • the cooling element may alternatively be referred to as a heat sink or heat sink.
  • the idea behind providing the cooling element is that individual or multiple micro-light-emitting diodes can be heated when the micro-light-emitting diodes are operated, for example due to electronic control of the micro-light-emitting diodes. This can, for example, lead to color changes in the light emitted by the affected micro-light-emitting diode. It can also or alternatively be a Heating of the image generating device and thus the micro-light-emitting diodes occurs through sunlight through the windshield of the motor vehicle on the head-up display installed in the motor vehicle.
  • the cooling element is provided to counteract such effects.
  • the cooling element can be designed as a heat-conducting injection molded part.
  • the cooling element is attached to the carrier. For example, it is glued to it, screwed to it or otherwise firmly connected to it.
  • the cooling element is, for example, made of aluminum or another heat-conducting metal.
  • the cooling element can first be specified, on which the carrier, which is designed, for example, as a film, is positioned and the matrix of micro-light-emitting diodes can be arranged on the carrier.
  • a heat sink, for example glued to the carrier, is therefore provided in order to prevent or at least counteract temperature fluctuations between individual micro-light-emitting diodes and undesirable heating of the matrix of micro-light-emitting diodes.
  • the carrier can have at least one electronic element on a side facing the matrix.
  • the electronic element is designed to supply the respective micro-light-emitting diode with electrical energy and/or to provide control information for the respective micro-light-emitting diode.
  • the carrier can form a circuit board for the matrix of microlight-emitting diodes. Any electronic supply and control can take place via the appropriately designed electronic elements on the carrier.
  • a supply or connecting line can be provided as an electronic element, that is, the individual micro-light-emitting diodes can, for example, be contacted.
  • the control information provided describes, for example, at least one control command according to which the respective micro-light-emitting diode is to be controlled.
  • the control information is transmitted to the microlight-emitting diode in question, for example from the central control device of the head-up display or the image generation device.
  • the control information for all micro-light-emitting diodes together specifies the image that is displayed on the image area of the first matrix and on the basis of which the virtual image is generated. This makes it possible in a simple way for each individual micro-light-emitting diode to be operated and controlled individually. This contributes to the full functionality of the head-up display.
  • An advantageous exemplary embodiment provides that the head-up display has an optical module.
  • the optical module can alternatively be referred to as the optical system of the head-up display.
  • the optical module has, for example, at least one flat and/or aspherical mirror.
  • the optical module is designed to at least contribute to generating the virtual image based on an image displayed using the first matrix.
  • the light that is emitted by the image generation device and represents the image is first directed through the optical module before it hits the projection surface of the head-up display, for example, and is then displayed to the viewer as a virtual image in the projection plane.
  • the light emitted by the image generating device is therefore first guided through the optical module.
  • the optical module is designed, for example, to enlarge the displayed image and to increase an image distance between the image surface and the projection plane such that the virtual image is displayed exactly in the intended projection plane outside the motor vehicle. The optical module therefore reliably ensures that the virtual image is generated.
  • the head-up display has a projection surface that is designed as a combiner or as a windshield.
  • the projection surface is a component of the head-up display on which the image provided by the image generation device, which has been deflected and/or enlarged by the optical module, for example, is displayed.
  • the image displayed there can be seen by the user as the virtual image.
  • the projection surface is therefore a reflective, translucent pane through which the user can see the virtual image and at the same time the real world behind the pane. This makes it possible for the virtual image to be superimposed on the actual surroundings, for example of the motor vehicle.
  • a combiner is an artificial projection surface that is used as a component of the head-up display.
  • the head-up display can include the windshield of the motor vehicle. This ultimately makes it possible for the virtual image to actually be seen by the user.
  • the image generating device has a matrix of micro-light-emitting diodes and an optical element arranged on the matrix, so that light can be emitted in the direction of the optical element by means of the respective micro-light-emitting diode.
  • the optical element is as a liquid crystal element, liquid crystal display or electrochromic element designed and designed to adjust an illumination intensity of the image generating device.
  • An additional aspect of the invention relates to a motor vehicle with the head-up display described.
  • the motor vehicle is, for example, a passenger car, a truck, a bus and/or a motorcycle or moped.
  • the head-up display is arranged, for example, in a front area of the motor vehicle, wherein a projection surface of the head-up display can be a combiner arranged, for example, in the vertical direction of the motor vehicle above a dashboard and/or a windshield of the motor vehicle.
  • the head-up display can be arranged at any position within the motor vehicle.
  • Fig. 1 is a schematic representation of a motor vehicle with a head-up
  • FIG. 2 shows a schematic representation of a beam path in a head-up display
  • Fig. 3 is a schematic side view of an image generation device for a head-up display.
  • FIG. 1 shows a motor vehicle 1 in which a head-up display 2 is arranged.
  • the motor vehicle 1 there is a user 3, who here is, for example, a driver of the motor vehicle 1.
  • a virtual image is displayed in a projection plane 4, which is located outside the motor vehicle 1.
  • the projection plane 4 is located here in a longitudinal direction of the motor vehicle 1 (x direction) in front of a windshield 5 of the motor vehicle 1 and thus in a Viewing area of the user 3.
  • the head-up display 2 is preferably arranged between a steering wheel and the windshield 5 of the motor vehicle 1.
  • the head-up display 2 is sketched in detail.
  • the head-up display 2 has an image generating device 6. This can have an image surface on which an image can be displayed, on the basis of which the virtual image in the projection plane 4 is generated.
  • the image generating device 6 has a matrix 7 of individual light sources.
  • the image generating device 6 has an optical element 8 which is arranged above the matrix 7 in an emission direction of the light from the light sources of the matrix 7. The light emitted by the respective light sources can therefore be emitted in the direction of the optical element 8 and must be transmitted through it in order to reach an optical module 9.
  • the head-up display 2 has the optical module 9, which has, for example, several optical elements 10, such as a flat and/or aspherical mirror.
  • the head-up display 2 has a projection surface 11, which is designed here as the windshield 5.
  • the projection surface 11 can be a combiner, that is, an additional component of the head-up display 2.
  • a beam path 12 of light is sketched as an example, which is emitted by the image generating device 6 in the direction of the optical module 9, at least deflected by means of the optical module 9 and displayed as a virtual image in the projection plane 4 by means of the projection surface 11. It can also be seen that the user 3 can see this virtual image in the projection plane 4. For this purpose, a viewing direction of the user 3 towards the projection plane 4 is shown as an extended part of the beam path 12.
  • the matrix 7 is made up of micro-light-emitting diodes 13, that is, formed.
  • the micro-light-emitting diodes 13 are the light sources of the matrix 7.
  • the matrix 7 with the micro-light-emitting diodes 13 thus represents a self-emitting display device and thus a self-emitting display.
  • the light emitted by the respective micro-light-emitting diode 13 is emitted in the z-direction outlined here, so that it is on the optical element 8 hits and at its upper end in the z direction viewed from the image generating device 6 emerges.
  • the optical element 8 is designed as a liquid crystal element, liquid crystal display or electrochromic element.
  • the optical element 8 is designed to adjust an illumination intensity of the image generating device 6 in order, for example, to be able to provide at least one light mode (day mode) and one dark mode (night mode) for the head-up display 2. This can be provided by appropriately controlling the optical element 8.
  • the optical element 8 can be controlled by applying an external voltage or an external current, whereby the illumination intensity of the light leaving the optical element 8 can be adjusted.
  • a control device 15 is schematically sketched, by means of which at least the optical element 8 and, for example, the micro-light-emitting diodes 13 can be controlled.
  • the matrix 7 is also arranged on a carrier 14 here.
  • the carrier 14 On a side facing the matrix 7, the carrier 14 has at least one electronic element which is designed to supply the respective micro-light-emitting diode 13 with electrical energy and/or to provide control information for the respective micro-light-emitting diode 13.
  • the control device 15 can be designed as the at least one electronic element.
  • the optical element 8 can be designed as a single cell, as is sketched here as an example, or can be formed from several cells arranged next to one another. If several cells are provided, these can each be controlled individually or together, in which case they are controlled by means of the control device 15.
  • the individual micro-light-emitting diodes 13 can at least partially be combined into individual pixels 16. Each pixel 16 can then have a red-lighting micro-light-emitting diode 17, a green-lighting micro-light-emitting diode 18 and a blue-lighting micro-light-emitting diode 19 and, if necessary, even more micro-light-emitting diodes 13.
  • ultraviolet light-emitting diodes 20 it is alternatively or additionally possible for ultraviolet light-emitting diodes 20 to be used as micro-light-emitting diodes 13, over each of which a converter 21 is arranged in order to convert the light emitted by the respective ultraviolet light-emitting diode 20 into different colored light in the visible wavelength range, so that the converter 21 can be selected accordingly Red, green or blue light can be generated, which in turn creates 16 all possible color combinations in one pixel become possible.
  • a color of the light that is emitted by the respective micro-light-emitting diode 13 and/or the respective pixel 16 from a plurality of micro-light-emitting diodes 13 can be adjusted by means of pulse wave modulation or by applying a current to the respective micro-light-emitting diode 13 or the respective micro-light-emitting diodes 13 of the pixel 16. This is done, for example, via the electronic element on the carrier 14, which provides the control information for the respective microlight-emitting diode 13.
  • pulse wave modulation or application of the current to the respective micro-light-emitting diode 13 or the respective micro-light-emitting diode 13 of the pixel 16 can at least contribute to adjusting the illumination intensity of the image generating device 6, that is, here too, for example, an illumination intensity reduction based on the individual micro-light-emitting diodes 13 or the individual pixels 16 be achieved.
  • a liquid crystal element or a liquid crystal display is sketched as an optical element 8 purely as an example.
  • This has a liquid crystal layer 22, which is surrounded on both sides by a glass carrier layer 23.
  • a polarizing thin layer 24 adjoins the glass carrier layer 23 on a side facing away from the liquid crystal layer 22.
  • the optical element 8 can be designed as an electrochromic element, for example as electrochromic glass and thus as dimmable glass.
  • the liquid crystal element and the liquid crystal display are preferably monochrome and therefore designed in one color.
  • the coordinates of the coordinate systems are to be understood purely as examples and different arrangements of the head-up display 2 and the image generating device 6 in relation to the motor vehicle 1 and to the other components of the head-up display 2 are possible.
  • the coordinate systems in Fig. 1 and Fig. 2 relate to the motor vehicle 1, that is, the x-direction corresponds to a longitudinal direction and the z-direction corresponds to a vertical direction of the motor vehicle 1.
  • the coordinate system in Fig. 3 relates to the image generating device 6, that is, the x-direction corresponds to a longitudinal direction or a transverse direction and the z-direction corresponds to a vertical direction of the image generating device 6.
  • the examples show a micro-LED display (LED for Light Emitting Diode) for a head-up display 2 with an increased dimmable area.
  • the head-up display 2 with the image generation device 6 is intended for this purpose.
  • the image generating device 6 has the matrix 7 made of micro-LEDs, that is, the micro-LED matrix (matrix 7), as well as a liquid crystal element or liquid crystal display (liquid crystal matrix) or the electrochromic element arranged above it for adjusting the lighting intensity.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Instrument Panels (AREA)

Abstract

L'invention concerne un affichage tête haute (2) pour un véhicule automobile (1), une unité de génération d'image (6) pour l'affichage tête haute (2), et un véhicule automobile (1) comprenant l'affichage tête haute (2). L'affichage tête haute (2) comporte un dispositif de génération d'image (6) avec une matrice (7) de micro-diodes électroluminescentes (13), un élément optique (8) étant disposé sur la matrice (7) de telle sorte que la lumière peut être émise dans la direction de l'élément optique (8) au moyen de chaque micro-diode électroluminescente (13). L'élément optique (8) est conçu sous la forme d'un élément à cristaux liquides, d'un affichage à cristaux liquides ou d'un élément électrochromique et est conçu pour régler une intensité d'éclairage du dispositif de génération d'image (6).
PCT/EP2023/069098 2022-07-25 2023-07-11 Affichage tête haute pour véhicule automobile et dispositif de génération d'image pour un affichage tête haute WO2024022797A1 (fr)

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DE102022118472.2A DE102022118472A1 (de) 2022-07-25 2022-07-25 Head-Up-Display für ein Kraftfahrzeug und Bilderzeugungseinrichtung für ein Head-Up-Display
DE102022118472.2 2022-07-25

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WO2024022797A1 true WO2024022797A1 (fr) 2024-02-01

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Citations (4)

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WO2019212633A1 (fr) * 2018-05-04 2019-11-07 Harman International Industries, Incorporated Affichage tête haute à réalité augmentée tridimensionnel réglable
DE102019201055A1 (de) 2019-01-28 2020-07-30 Continental Automotive Gmbh Bildgebende Einheit für eine Vorrichtung zum Anzeigen eines Bildes
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DE10245580B4 (de) 2002-09-27 2006-06-01 Siemens Ag Einrichtung zur Erzeugung eines Bildes
DE102011075887A1 (de) 2011-05-16 2012-11-22 Robert Bosch Gmbh Anzeigevorrichtung
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WO2019212633A1 (fr) * 2018-05-04 2019-11-07 Harman International Industries, Incorporated Affichage tête haute à réalité augmentée tridimensionnel réglable
DE102019201055A1 (de) 2019-01-28 2020-07-30 Continental Automotive Gmbh Bildgebende Einheit für eine Vorrichtung zum Anzeigen eines Bildes
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