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Heads Up Displays (HUDs)
Satya EVO
Modern Human-Machine Interfaces,
The head-up display reduces driver distraction and increases driver safety.
A head-up display (HUD) shows information exactly where you need it – directly in the line of sight. Drivers get all the important information such as speed, warning signals and indicator arrows for navigation without looking down to the instrument cluster or the secondary display. In the case of a windscreen head-up display drivers see a virtual image, but not as a flat, static picture on the windshield, but rather, as “floating” over the hood at a distance of about two meters. In the case of an Augmented Reality Head-up Display the information of the windshield HUD is enriched with a layer of information right on the street in front of the car. With the Combiner HUD the installation volume is reduced significantly, because instead of the windshield a small, transparent plastic disc is used as a mirror for the information shown.
For Continental the HUD represents a key technology for its holistic approach for the human-machine-interface which will lead to a dialogue without words between the driver and his vehicle.
Augmented-Reality HUD
In the near future augmented reality head-up displays will help to make driving even more comfortable and safe. This generation of HUDs supplements the exterior view of the traffic conditions in front of the vehicle with virtual information (augmentations) for the driver.
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The augmented reality head-up display differs from a normal windshield-HUD since the reflected information appears to be part of the driving situation itself
When navigating, for example, a virtual symbol inserted precisely into the exterior view marks the route that the driver should follow on the road ahead
When distance controls (adaptive cruise control, ACC) are enabled, a marking in the AR-HUD visualizes which vehicle in front is detected by the assistance system
In a world that is becoming increasingly complex, the AR-HUD relieves the burden on the driver because what the driver’s eyes see is directly connected with explanatory information.
This leads to a new quality of information that allows the driver to register the driving situation they are in even faster – essential for more safety and comfort.
AR-HUD Technology
The AR-HUD moves virtual information directly into the driver’s line of sight.
It inserts full-color graphics into the real road view in an approximately 130 cm-wide and over 60 cm-high section of the driver’s field of vision at a distance of 7.5 meters
The basis for this is provided by digital micro-mirror device (DMD) technology, which is also used in digital cinema projectors. Continental will bring this projection technology into series production as early as in 2016
Three possible applications are realized in connection with driver assistance systems in the Continental demo vehicle as an example
The AR-HUD supports the driver if the vehicle is in danger of unintentionally drifting out of a lane
The AR-HUD also supports the use of ACC (adaptive cruise control). When ACC is enabled, a crescent-shaped marking in the AR-HUD highlights the vehicle in front that is detected by the electronics
The AR-HUD also reflects navigation information in the real exterior view. This leads to the driver knowing which turning they have to take, without having to look back and forth between the navigation screen and the real world
This starts a new interaction between the vehicle and the driver. The vehicle shows the driver what the assistance systems can see and what they are doing. This creates trust and will therefore also help to create acceptance for current and future driving functions, as for example automated driving.
AR-HUD Benefits
>The augmented reality head-up display makes the human machine dialogue much more intuitive:
>Optically indicators seem to be located directly on the road
>Orientation in traffic is significantly easier and accelerated
>Dangerous objects or situations are detected more quickly
>The Augmented Reality HUD is a key technology for automated driving
Combiner-HUD Features
With the combiner-HUD Continental extends its range of scalable solutions for head-up displays (HUD). This compact example of the HUD principle is closely related to the windshield-HUD, but requires less installation space. A small, transparent plastic disc called the “combiner” is used as a mirror for the information shown, instead of the windshield itself. Now the ergonomic advantages of HUD technology can have the broadest possible use in the vehicle.
The combiner-HUD can be easily integrated in whole vehicle families as well as in particularly sporty cars with limited space in the cockpit
Compared with the windshield-HUD the combiner-HUD requires only slightly more than half the installation space, depending on the application. This is possible because the windshield does not need to be integrated in the optical path here. Instead this path is positioned in the combiner, which is optimized for its optical properties
Under favorable conditions, a combiner-HUD even comes with just one single mirror in the interior. This makes the construction not only compact but also extremely flat, which also makes it easier to integrate in smaller or particularly sporty vehicles
The combiner provides almost the same ergonomic advantages: while reading selected information, drivers can constantly keep their eyes on the traffic. They no longer have to keep looking back and forth between the road and their display instrument
Technology
Virtual Image up to 5°x1,4°
Projection distance up to 2,3m
TFT Technology
Resolution up to 70px/°
Brightness up to 12000 cd/m²
At continental we are developing many solutions to assist and augment the driving experience in cars. Enhancing safety and improving connectivity, to deliver immersive yet safe soltuions to the user.
New Integrated Combiner Head-up Display
Continental has reduced the minimum volume space for head-up displays even further to only 0.85 l. This was possible by integrating a Combiner Head-up Display into the Instrument Cluster. HUD and Instrument Cluster now share a single 3.5” TFT with synchronized images
The integrated Combiner HUD is the next step towards offering head-up displays for all vehicle classes
It is also a proof of Continentals competence in system integration, to develop cost sensitive solutions with less system complexity but all functions that drivers demand
DMD HUD
DMD technology closes the gap between the classic head-up display and augmented reality head-up displays. It provides a better image with a larger display area. Replacing previously used TFT LCD technology, the DMD generates graphical elements in the same way as digital cinema projectors, based on mirror optics and a picture generating unit (PGU). Thanks to an intermediate screen, sequential color management and a lens-based optical path, the image is brighter and sharper than with conventional head-up displays.
Continentals new DMD HUD is one of the brightest and largest in its class and allows drivers to see the display even through polarized sunglasses. Moreover, it adds comfort and security to the holistic human-machine interface due to the increased display area. With a DMD-HUD information can be shown directly in the path of sight, that was formerly located in secondary displays or in the instrument cluster These characteristics then enable vehicle manufacturers to reduce redundancy.
Technical Specifications
Enhanced color-space/ saturation and light efficiency
Enlarged image size (10° x 3,5°)
Better temperature regulation within the system
Projection on Windshield-Master
Projection distance 2 m
DMD – Chip: 0.3” WVGA
Resolution: 854 x 480 Pixel
Intermediate Screen (IIP) 3.1 inch
Virtual image: 10° x 2.5°
Proj. Distance: 2.4 m
Brightness: > 12.000 cd/m2
Color management: sequential color
Mirror technology: plastic based mirrors
Ultra thin Augmented Reality Head-up Displays
With the Holographic HUD, an innovative technologie from Continental and DigiLens the volume of the Augmented Reality Head-up-Display will be reduced to a minimum. Compared to currently available systems, the ultra thin holographic Head-up Display from Continental and DigiLens will be smaller by a factor of three. It will need less space while at the same time providing a larger image with all the relevant information.
With this innovation drivers will have all relevant information straight in front of their eyes in a very intuitive way that supports easy and fast orientation in traffic.
The technology will also ease drivers into accepting automated driving faster. With an Augmented Reality HUD drivers will feel secure in the knowledge of what the car actually sees and knows. In turn, driver confidence in automated driving will be enhanced significantly.
Windshield HUD
Technology
The windshield head-up display shows relevant information directly on the screen of the windshield. The driver always has all the information he needs in line of sight. Also in case of special events or dangerous situation the driver can be warned without any driver distraction.
Different technical solutions are available depending on the requirements and the vehicle segment.
Modern, safe and efficient Human Machine Interface
Secure integration of CE Technologies
Markets and target group specific customizations
