Status: Need is Open

Anti-reflective surface with high transmittance for HUDs

Request Number

Point of Contact

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
  • High scratch-resistance

Total thickness of HUD cover or display surface below 15 mm

Possible Approaches
  • 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
Due Date
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

Christoph Mersmann
Gallery Moderator(s)
Dezarae Carver
Request Number
Preferred Collaboration Types
Area of Interest