A dimmable visor is disclosed. In one embodiment, the visor includes a first clear sheet having a first surface and an electro-opaque sheet having a first surface and a second surface and having adjustably variable transparency. The first surface of the electro-opaque sheet is in contact with the fi
A dimmable visor is disclosed. In one embodiment, the visor includes a first clear sheet having a first surface and an electro-opaque sheet having a first surface and a second surface and having adjustably variable transparency. The first surface of the electro-opaque sheet is in contact with the first surface of the first clear sheet. The visor also includes a pair of transparent electrodes disposed on two opposite edges of the electro-opaque sheet, each of the transparent electrodes having an area smaller than the electro-opaque sheet. The visor also includes a second clear sheet having a first surface in contact with the second surface of the electro-opaque sheet. The visor also includes a suspension hinge attached to one edge of the first clear sheet and is configured to rotate about the suspension hinge. The electro-opaque sheet changes its transparency in response to electrical energy being applied to the electro-opaque sheet.
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1. A dimmable visor, comprising: a first clear polymer sheet having a first surface;a second clear polymer sheet having a first surface;an electro-opaque sheet having a first surface and a second surface, and having a variable transparency, the first surface of the electro-opaque sheet being in cont
1. A dimmable visor, comprising: a first clear polymer sheet having a first surface;a second clear polymer sheet having a first surface;an electro-opaque sheet having a first surface and a second surface, and having a variable transparency, the first surface of the electro-opaque sheet being in contact with the first surface of the first clear polymer sheet, the second surface of the electro-opaque sheet being in contact with the first surface of the second clear polymer sheet;a pair of transparent electrodes disposed between the first surface of the first clear polymer sheet and the first surface of the electro-opaque sheet and between the first surface of the second clear polymer sheet and the second surface of the electro-opaque sheet, respectively, each of the transparent electrodes having a surface area smaller than that of the electro-opaque sheet;anda suspension hinge attached to one edge of the first clear polymer sheet, wherein the dimmable visor is configured to rotate about the suspension hinge, and wherein the electro-opaque sheet changes its transparency in response to electrical energy being applied to the electro-opaque sheet. 2. The dimmable visor of claim 1, further comprising drive electronics in electrical communication with the electro-opaque sheet. 3. The dimmable visor of claim 2, further comprising a user interface in electrical communication with the drive electronics. 4. The dimmable visor of claim 1, wherein the electro-opaque sheet comprises a suspended particle device. 5. The dimmable visor of claim 1, wherein the electro-opaque sheet comprises an electrochromic device. 6. The dimmable visor of claim 2, wherein the electro-opaque sheet comprises an electrochromophoric device. 7. The dimmable visor of claim 6, wherein the drive electronics apply a periodic voltage pulse to the electrochromophoric device. 8. The dimmable visor of claim 2, wherein the drive electronics are in electrical communication with one or more photocells. 9. A dimmable windshield, comprising: a windshield;an electro-opaque sheet having a first surface and a second surface, and having a variable transparency, the first surface of the electro-opaque sheet being in contact with the windshield;a pair of transparent electrodes disposed on two opposite edges of the electro-opaque sheet, each of the transparent electrodes having an area smaller than that of the electro-opaque sheet; anda clear sheet having a first surface, the first surface of the clear sheet being in contact with the second surface of the electro-opaque sheet, wherein the electro-opaque sheet changes its transparency in response to electrical energy being applied to the electro-opaque sheet. 10. The dimmable windshield of claim 9, further comprising drive electronics in electrical communication with the electro-opaque sheet. 11. The dimmable windshield of claim 10, further comprising a user interface in electrical communication with the drive electronics. 12. The dimmable windshield of claim 11, wherein the user interface is located in a dashboard. 13. The dimmable windshield of claim 11, wherein the user interface is located in a steering wheel. 14. The dimmable windshield of claim 11, further comprising one or more photocells in electrical communication with the drive electronics. 15. The dimmable windshield of claim 9, wherein the clear sheet is a polymer. 16. A vehicle, comprising: a windshield; anda dimmable visor comprising:an electro-opaque sheet having a first surface and a second surface, and having a variable transparency, the first surface of the electro-opaque sheet being disposed on the windshield; anda pair of transparent electrodes disposed on two opposite edges of the electro opaque sheet, each of the transparent electrodes having an area smaller than that of the electro-opaque sheet; anda clear sheet having a first surface, the first surface of the clear sheet being in contact with the second surface of the electro-opaque sheet, wherein the electro-opaque sheet changes its transparency in response to electrical energy being applied to the electro-opaque sheet. 17. The vehicle of claim 16, wherein the clear sheet comprises at least one of the pair of transparent electrodes. 18. The vehicle of claim 16, further comprising drive electronics in electrical communication with the electro-opaque sheet. 19. The vehicle of claim 16, further comprising one or more photocells in electrical communication with the drive electronics.
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Naik, Sanjeev Manubhai, Automatic sun visor and solar shade system for vehicles.
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