More and more new cars are bringing the optional head-up display products (HUD) into the market. Like other display devices in the car, the HUD is getting bigger and bigger, and the HUD display is getting more and more to help the driver better focus on the road. But for automakers (OEM) content developers, this means an increasingly serious challenge. What kind of information should be displayed through the HUD? Once the car buyer chooses to abandon the HUD, where should the content that should be displayed in the HUD be displayed? In order to fully exploit the full potential of HUD, we may need a new approach to content development.
What information should we display through HUD?
We are witnessing that the new generation of display technology led by TI DLP® technology is gradually being accepted by the automotive market. DLP technology can help car manufacturers develop wide field of view (WFOV) HUDs and HUDs that enable augmented reality (AR) functions, providing car manufacturers with more effective display areas to enhance the customer experience. The WFOV HUD extends the field of view to a width of 12 degrees or more, which is a significant improvement over existing HUDs - the widest field of view of a typical HUD system is about 6 degrees. As the field of view (FOV) expands, we see more and more Advanced Driver Assistance System (ADAS) content being displayed on the HUD – such as blind spot detection and lane departure warning. However, the expansion of the display area does not mean that more content should be displayed all the time, and we should use the HUD appropriately in a way that does not cause distraction to the driver. WFOV HUD gives car dealers the opportunity to display more content where and when they need it, instead of just having more icons flood the screen and dazzling the driver.
In addition to a wide field of view, the new in-vehicle display technology will accelerate the introduction of AR HUD. First, let's define AR—because of the HUD technology, the industry has different opinions about its definition. In this context, an AR HUD is defined as a HUD whose image is focused at a distance. The virtual image of the HUD will not appear to the front of the car, but at a distance of 7 meters, 10 meters or even 20 meters along the road. These HUDs are sometimes referred to as "contact simulation" HUDs because they will provide images to be superimposed into the real world. For the driver, such HUD displays more natural content than traditional HUD displays, and such HUDs have the potential to become a new generation of ADAS display products.
Today's HUD displays redundant content
Although WFOV and AR HUD have been improved, the current HUD development model still uses HUD functionality as an optional feature. This usually means that the information provided is available elsewhere in the car. For example, the center console can display navigation information; the dashboard can display speed; the dashboard and even the side view mirror can display ADAS information. Since the current HUD system is optional, this content needs to be developed twice by the car manufacturer: this will not only meet the needs of models equipped with HUD, but also meet the needs of models without HUD.
a new method
If the HUD is turned into a standard feature, how will this status change? What if the depot can develop its own Human Machine Interface (HMI) with the HUD in the default car? What is the use of the dashboard? What content is best for placement in the center console? Perhaps the answers to these questions will differ from the current use of these display products. The HUD may become the main display product when driving. Information such as speed, navigation data, ADAS warnings, quick glance entertainment updates, and even reversing camera video can be displayed in the HUD. The dashboard is a display product for continuous entertainment information, trip counters, odometers or other convenient information, and the center console can continue to be an interactive display product for control and information input. However, by using the dashboard for content such as entertainment information and detailed map data, the center console can be turned into a smaller display product dedicated to drivers and passengers such as temperature control, navigation destination input, or multimedia selection. Content control required. This is just an example of how these display products work together to become redundant devices.
One question you might ask is: What causes the car manufacturer to make such a change? The answer may be customer loyalty. Think about the operating system (OS) on your computer: When you get used to an OS, it's harder to switch to another OS. When you need to change your computer, you will most likely buy a computer that uses the same OS as your previous computer. The same is true for the vehicle's HMI. If you are used to the configuration of a car factory, you will depend on the manufacturer. A car manufacturer that can develop a comprehensive and unique solution for automotive display products (including center consoles, dashboards and HUDs) will have the opportunity to win higher customer loyalty. When consumers buy their next car in the market, in order to continue their user experience and reduce the learning process resulting from adopting a new HMI, they are likely to first choose the same brand as the car they are currently driving.
Now, some arguments against the inclusion of HUD as a standard feature often talk about the cost and space required to install HUD. First, let's discuss the cost: the cost of HUD systems is declining due to increased shipments, more competitive technology entry into the market, and engineering improvements brought about by the maturity of HUD systems. If we adopt this new approach and make HUD a standard feature, then the increase in shipments is likely to lead to additional cost optimization. Once the HUD becomes a standard in-vehicle feature, the cost reduction will not only come from the windshield, communication interface, processor selection, and electronics integration. For example, an infotainment platform, such as TI Jacinto 6, can distribute all such content to multiple display products without having to provide the same graphics multiple times. Only one windshield is needed for each car. Eliminating the redundancy of components can lead to cost reductions in the system.
Now let's discuss the issue of packaging. In vehicle design, HUD requires space. This is indeed a big challenge. But as I mentioned above, if we change our model and choose to rethink these questions: Why should all display products be used in vehicles? How to use them? Does this bring a smaller dashboard? Can the OEM completely cancel the presence of the dashboard? Then we will find that there is no way to optimize.
in conclusion
New automotive display technology is now entering the market and continues to improve for HUD, changing the way consumers experience navigation and ADAS capabilities in their vehicles. Conversely, viewing HUDs as redundant display products limits the effectiveness and widespread adoption of the technology. By eliminating redundancy in the HMI and treating the development of the HUD in another way, the HUD is a standard feature, and the depot can exploit the true potential of the head-up display product as a core component in future vehicle HMIs.
Author: Jeff Dickhart, Texas Instruments (TI)
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