BMW is seeking solutions on how to minimize the reflection of incident light that occurs at the glass panel that covers a HUD system or at the surface of the electronic display within the system. The transmitted light of the HUD projection should remain unaffected. Solutions that meet the need criteria will be invited to work with BMW to evaluate and develop the idea.
Head-up displays (HUDs) in cars that project information on the windscreen are becoming increasingly common and have a growing range of functions. HUD systems are situated in front of the driver below the instrument panel under the windscreen and covered with a glass panel. A common problem of HUDs is that reflections on this glass panel due to incident light (i.e. sunlight, lights from other vehicles or street lights) may reduce the perceptibility of the HUD projection or even blind the driver. Incident light that enters the HUD system and is reflected on the surface of the electronic display within the system can cause similar problems. Currently used anti-reflective coatings do not reduce the reflections to the extent necessary to eliminate this problem.
BMW is therefore looking for innovative approaches on how to reduce distracting reflections at the glass panel surface and/or the display surface. While reflections from incident light should be minimized, the solution should have a minimal effect on the HUD projection.
Key success Criteria
Solution can be either applicable for a HUD glass panel, or an electronic display surface, or both
Solution applicable for surface areas of up to 30x40cm
Very low reflection of incident light (in the visible spectral range) no matter the angle of incidence (specular reflectance below 10^-4 of total incident light as a minimal requirement, below 10^-7 for an optimal solution)
Transmitted light of HUD projection above 40%
Ideally, low transmittance of incident light into covered system
No refraction, scattering or change of polarization of transmitted light of HUD projection
Temperature resistance up to 110°C
Total thickness of HUD cover or display surface below 15 mm
Both early stage solutions and mature solutions, mature solutions > TRL 5 are preferred (Integrated components demonstrated in a laboratory environment)
Technologies may refer to, but are not limited to:
Coatings of glass surfaces
Glass surface treatments
Surface modifications of glass panel or display surfaces
Modifications to the windshield
Optical filters and other optical elements
Active glare suppression systems
Modifications within the electronics of the HUD picture generating unit
Approaches not of Interest
Solutions not applicable to windshield head-up displays but only to combiner head-up displays
Technologies that do not meet the high safety standards of the automotive industry
Technologies harmful to the environment
Technologies with high service and maintenance requirements
Sep 6, 2019
Items to be submitted
To submit your idea or proposal, please use the Respond button on the right of this page. Please note that only non-confidential information can be accepted. By submitting a response: you represent that the response does not contain and will not be deemed to contain any confidential information of any kind; and you acknowledge that BMW may, in their absolute discretion, select or reject a response or any portion thereof.
Your response should be an executive summary of what you are proposing. It should include both technical information on how the technology will work in addition to the given benefits to the consumer and how you believe it can be of use to us as a business. Information on the background of those involved in the project will also be required in your response to this need posting.
We suggest you include the following:
Describe the technology
Datasheets or estimations on the performance of the solution with regard to the given key success criteria
How the technology is relevant to our brands (specific or in general)
Level of maturity of the technology (development stage or just a proposal)
How adaptable is the technology, can it be used in a wide range of scenarios?
Background information on the people involved in the proposal
Remember….. Don’t send anything that could be considered confidential at this point.
Client Point of Contact
Preferred Collaboration Types
To Be Negotiated
Area of Interest
Materials Science > Coatings
Materials Science > Optical Materials
Manufacturing > Computer, electronic and optical products