Photochromic vehicle window

Abstract

The present disclosure describes various vehicle window assemblies including a photochromic window and a mounting assembly surrounding at least part of the window. The mounting assembly may be sized and configured for mounting to the cabin of a vehicle. The photochromic window may include a region configured to at least partially inhibit transmission of light in a visible, IR or UV frequency range upon exposure to a level of light.

What is claimed is: 
     
         1 . A windshield assembly, comprising:
 multiple photochromic windows; and   wherein at least one of the photochromic windows includes a first photochromic region configured to progressively change transmission of a light in a frequency range by a first range of percentages, a second photochromic region configured to progressively change transmission of the light in the frequency range by a second range of percentages, wherein the first range of percentages is smaller than the second range of percentages.   
     
     
         2 . The windshield assembly of  claim 1 , wherein the frequency range includes at least one of a visible spectrum of light, an infrared spectrum of light, or an ultraviolet spectrum of light. 
     
     
         3 . The windshield assembly of  claim 1  ,wherein the frequency range includes a visible spectrum of light. 
     
     
         4 . The windshield assembly of  claim 1 , wherein the frequency range includes an infrared spectrum of light. 
     
     
         5 . The windshield assembly of  claim 1 , wherein the frequency range includes an ultraviolet spectrum of light. 
     
     
         6 . The windshield assembly of  claim 1 , wherein the at least one photochromic window is at least one of a windshield, a rear window, a door window, or a roof window. 
     
     
         7 . The windshield assembly of  claim 1 , wherein the at least one photochromic window is a roof window comprising over 75% of the surface area of a roof of the cabin. 
     
     
         8 . The windshield assembly of  claim 1 , wherein changing the transmission of the light includes at least one of absorption or reflection of the light. 
     
     
         9 . The windshield assembly of  claim 1 , wherein the at least one photochromic window includes microcrystalline silver halides and the level of light includes an intensity of ultraviolet light. 
     
     
         10 . The windshield assembly of  claim 1 , wherein the first photochromic region is smaller than the total surface area of the photochromic window. 
     
     
         11 . A vehicle rear window assembly, comprising:
 multiple photochromic window regions; and   wherein at least one of photochromic regions includes a first photochromic region configured to progressively change transmission of a light in a frequency range by a first range of percentages, a second photochromic region configured to progressively change transmission of the light in the frequency range by a second range of percentages, wherein the first range of percentages is smaller than the second range of percentages.   
     
     
         12 . The vehicle rear window assembly of  claim 11 , wherein the frequency range includes a visible spectrum of light. 
     
     
         13 . The vehicle rear window assembly of  claim 11 , wherein the frequency range includes an infrared spectrum of light. 
     
     
         14 . The vehicle rear window assembly of  claim 11 , wherein the frequency range includes an ultraviolet spectrum of light. 
     
     
         15 . The vehicle rear window assembly of  claim 11 , wherein the at least one at least one of a windshield, a door window, or a roof window. 
     
     
         16 . The vehicle rear window assembly of  claim 11 , wherein the window is a roof window comprising over 75% of the surface area of a roof of the cabin. 
     
     
         17 . The vehicle rear window assembly of  claim 11 , wherein changing the transmission of the light includes at least one of absorption or reflection of the light. 
     
     
         18 . The vehicle rear window assembly of  claim 11 , wherein the level of light includes an intensity of ultraviolet light. 
     
     
         19 . The vehicle rear window assembly of  claim 11 , wherein changing transmission of the light by the first percentage includes changing a transmittance of the light in the frequency range through the window from greater than 90% to less than 50%.