Dual active film electrochromic display device
AssigneeUniversity of Florida Research Foundation, Inc.
InventorsJohn R. Reynolds, Aubrey Lynn Dyer, Ece Unur
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Abstract
A dual active electrochromic device is a combination of at least two working electrodes that contain electrochromic materials and at least one counter electrode where the potentials between each working electrode and a counter electrode are independently supplied. No more than one electrode is reflective. The color of the device results from the additive color of the electrochromic materials and varies according to the potentials applied independently. The electrochromic materials can be electrochromic polymers that are deposited as film on substrates to form the working electrodes. The electrochromic device can be used for display or window applications.
Claims50
An electrochromic device comprising:
- a first working electrode comprising a first transmissive material and a first electrochromic material;
- a second working electrode comprising a second material and a second electrochromic material, wherein said second material can be the same or different than said first transmissive material;
- at least one counter electrode;
- and
- electrolyte comprising material dispersed between and contacting said counter electrode and said working electrodes, wherein said counter electrode is transmissive and sandwiched between said working electrodes, wherein said second working electrode is a reflective conducting material or comprises a transparent conductive material whose surface opposite said counter electrode contacts a reflective material and said electrochromic material is disposed on the surface directed toward said counter electrode, wherein electrical potentials are independently applied between said first working electrode and said counter electrode and said second working electrode and said counter electrode, and wherein color observed from said device is derived by combination of colors of said working electrodes.
An electrochromic device comprising:
- a first working electrode comprising a first transmissive material and a first electrochromic material;
- a second working electrode comprising a second material and a second electrochromic material, wherein said second material can be the same or different than said first transmissive material;
- at least one counter electrode;
- and
- electrolyte comprising material dispersed between and contacting said counter electrode and said working electrodes, wherein said second working electrode is sandwiched between said first working electrode and said counter electrode and said second working electrode is porous or partitioned, wherein said second working electrode is diffuse reflective or specular reflective, wherein electrical potentials are independently applied between said first working electrode and said counter electrode and said second working electrode and said counter electrode, and wherein color observed from said device is derived by combination of colors of said working electrodes.
An electrochromic device comprising:
- a first working electrode comprising a first transmissive material and a first electrochromic material;
- a second working electrode comprising a second material and a second electrochromic material, wherein said second material can be the same or different than said first transmissive material;
- at least one counter electrode;
- and
- electrolyte comprising material dispersed between and contacting said counter electrode and said working electrodes, wherein electrical potentials are independently applied between said first working electrode and said counter electrode and said second working electrode and said counter electrode, wherein said first and second electrochromic materials comprise independently a cathodically coloring material, an anodically coloring material, or a material that is of one color in a neutral state and of a different color in an oxidized state, and wherein color observed from said device is derived by combination of colors of said working electrodes.
Dependencies are inferred from the claim text.