Electrochromic device
First Claim
1. In an electrochromic device of the type having a substrate, an electrode disposed on the substrate, a layer of electrochromic material disposed in a predetermined pattern on the electrode and an electrolyte disposed on the layer of electrochromic material, the improvement comprising:
- said layer of electrochromic material having anisotropic topography formed by depositing by evaporation said electrochromic material such that the direction of evaporation makes an acute angle in the range of from 30°
to 70°
with respect to the normal to said substrate.
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Accused Products
Abstract
An electrochromic device includes a layer of electrochromic material, such as tungsten oxide, which is deposited by oblique evaporation at an acute angle of incidence in the range of from 30° to 70° between the normal to the substrate and the direction of the evaporation. Due to the anisotropic topography achieved by the oblique evaporation, the layer of electrochromic material exhibits improved fast response time and long life time of cycling of coloration and bleaching.
13 Citations
16 Claims
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1. In an electrochromic device of the type having a substrate, an electrode disposed on the substrate, a layer of electrochromic material disposed in a predetermined pattern on the electrode and an electrolyte disposed on the layer of electrochromic material, the improvement comprising:
- said layer of electrochromic material having anisotropic topography formed by depositing by evaporation said electrochromic material such that the direction of evaporation makes an acute angle in the range of from 30°
to 70°
with respect to the normal to said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- said layer of electrochromic material having anisotropic topography formed by depositing by evaporation said electrochromic material such that the direction of evaporation makes an acute angle in the range of from 30°
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12. In an electrochromic device of the type having a substrate, an electrode disposed on the substrate, a layer of electrochromic material disposed in a predetermined pattern on the electrode and operable to undergo cycles of coloration and bleaching during use of the electrochromic device, and an electrolyte disposed on the layer of electrochromic material, the improvement comprising:
- said layer of electrochromic material having an anisotropic topography formed by the deposition by evaporation of electrochromic material at a direction of evaporation which makes an acute angle in the range of from 30°
to 70°
with respect to the normal to said substrate to effectively speed up the response time of coloration and bleaching as compared to electrochromic material of the same composition having isotropic topography. - View Dependent Claims (13, 14)
- said layer of electrochromic material having an anisotropic topography formed by the deposition by evaporation of electrochromic material at a direction of evaporation which makes an acute angle in the range of from 30°
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15. In an electrochromic display device of the type having a substrate, an electrode disposed on the substrate, layers of electrochromic material forming plural segments and disposed on the electrode, and an electrolyte disposed on the layers of electrochromic material, the improvement comprising:
- said layers of electrochromic material having anisotropic topography formed by depositing by evaporation said electrochromic material such that the direction of evaporation makes an acute angle in the range of from 30°
to 70°
with respect to the normal to said substrate, and means for applying a DC electric field between preselected ones of the electrochromic layers on the electrode to effect the transfer of electric charges through the electrolyte between the selected electrochromic layers. - View Dependent Claims (16)
- said layers of electrochromic material having anisotropic topography formed by depositing by evaporation said electrochromic material such that the direction of evaporation makes an acute angle in the range of from 30°
Specification