Electrochromic display with porous separator
AssigneeTimex Corporation
InventorMarshall Leibowitz
Life of this patent
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Abstract
An electrochromic display device having transparent electrodes on a substrate and coated with electrochromic material for selectively displaying optical patterns, a counter-electrode on a parallel substrate also coated with electrochromic material, a thin porous separator membrane for closely spacing the substrates, the separator pores saturated with liquid electrolyte contacting the electrochromic layers and pigment providing a contrasting background for the first mentioned electrochromic layer and hiding the second electrochromic layer.
Claims9
In an electrochromic display of the type having a first substrate with selectively actuatable transparent electrodes and first electrochromic layers thereon, and also having a second substrate with counter-electrode and second electrochromic layer thereon, the improvement comprising:
- porous separator means applied as a layer and uniformly and closely spacing said first and second substrate members, the pores of said separator means being filled with liquid electrolyte, and
- pigment means held by said separator means and selected to provide contrast with said first electrochromic layers and disposed to hide said second electrochromic layer.
Dependencies are inferred from the claim text.