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I think if you cannot see through the windshield, the HUD display is the least of your worries
Anyways, HUD is a reflection, it's like the mirror in your bathroom, in the situation where you can't see yourself in mirror (fog, ice.....) , you won't be able to see the HUD image either.
Garlan Garner
Banned
If you can't see through the windshield due to interior fogging or ice, I don't think it will be reflective. The HUD projection requires a reflective surface to hit your eyes.
zenmaster said:
evp said:
Light gets polarized when it reflects off a surface. Look at the illustration here: Brewster's angle - Wikipedia, the free encyclopedia
Polaroid sunglasses suppress sunlight that has been polarized in the horizontal direction by reflection off surfaces that are oriented horizontally, like water, roads, etc. The reflection of an image off the windshield is also horizontally polarized, thus polaroid sunglasses are effective at suppressing reflections of things sitting on the dashboard. This includes images projected from the dash into the windshield. Try the experiment: put a piece of white paper on the dash, observe the reflection without sunglasses, then with them on. Let us know how much the reflection is suppressed.
Xminus6
Member
That surface is in the inside of the window. In the BMW there's a small patch of material on the inside of windshield that reflects the HUD. So you should be able to see the HUD even when you can't see out the window.
Presumably, if that patch is covered you can't see the reflection. A sheet of interior ice should work great for covering the patch.
Model S M.D.
Ludicrous Radiologist
Didn't have time to read through all of the posts, so sorry if this has been posted already. Would be cool if the HUD/Autopilot looked like this:
BMW just showed off its new concept car — and it’s 100 years ahead of schedule
BMW just showed off its new concept car — and it’s 100 years ahead of schedule
stopcrazypp
Well-Known Member
In your experiment however, the paper may have components that are horizontally polarized, but also those that are not horizontally polarized. So yes, if you wear sunglasses the reflection would be notably suppressed (because the horizontal components are suppressed). However, that doesn't necessarily mean all components will be suppressed.
If you have a display that is vertically polarized, then none of the light would be blocked by the polarization of the sunglasses. If it is 45 degree polarized (as is more common), it'll be dimmed. If horizontally polarized it'll be invisible.
Reading forums, it seems BMW HUDs are completely invisible with sunglasses, but GM HUDs (even the old ones) are still visible with sunglasses (although possibly dimmed). The latest color one (which may be using the DLP technology discussed above) seems to be best (clearly visible even with sunglasses).
Xminus6
Member
I've never lived in a location where ice developed on the inside of my windshield. I've had some fog and condensation but ice? I'll defer to people who live in climates that cold.
I am more inclined to think that the steering wheel will have an LCD screen as a replacement for the instrument panel. This design is probably the easiest choice to bring unique innovation into the mass market car (tesla will be the first) and keeping in mind that the car needs to be manufactured for right hand/left hand with common components and minimal reconfigurations. Formula 1 cars have long utilized this steering wheel concept. An Inside Look at the Insanely Complex Formula 1 Steering Wheel
No thanks. An easier choice would just be a regular instrument panel. Better choice too, IMHO. I want to move the information FURTHER from me rather than closer. I certainly don't want it spinning around and being blocked by my arms.
Thank you kindly.
Hank101
Go Tigers!
A data phone (or Bluetooth monitor) with an OBDII Bluetooth dongle, and the right app, can be used as LCD dash - place it where you want it. Volt/Prius/Leaf owners do this often to track battery range and usage.
Also, HUD, or data could be projected onto the white dash behind the steering wheel, simulating an LCD dash, which may be a lower cost option. This (projection) may also allow greater user customization, including on/off.
Also, HUD, or data could be projected onto the white dash behind the steering wheel, simulating an LCD dash, which may be a lower cost option. This (projection) may also allow greater user customization, including on/off.
NickHoffmann
Member
I still have my money on a transparent LED film embedded into the windshield. No projection/reflection HUDs.
using projection would make it challenging to read during sunny days
or maybe the white part will be an entirely OLED panel (customize theme or info you'd like to have, same for passenger)
ModelNforNerd
Active Member
except the whole "ease of manufacturing" mantra they're trying to stick to with the Model 3.
I would imagine that windshield would NOT be cheap.
Plus, in the Northeast, the 1st time you chip it, you're done.....Safelite can't fix that.
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