ELECTROCHROMIC DEVICE

• US 3,451,741 A
• Filed: 06/15/1966
• Issued: 06/24/1969
• Est. Priority Date: 06/15/1966
• Status: Expired due to Term

• Current Assignee: Philip Manos
• Original Assignee: Philip Manos
• Inventors: Manos, Philip
• Application Number:
  US04/557,669
• Time in Patent Office: 1,105 Days
• US Class Current: 359/275
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: F21V 9/40 with provision for controlling spectral properties, e.g. colour, or intensity
• CPC Class Codes: G02F 1/1503 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
• CPC Class Codes: G02F 1/1533 structural features not otherwise provided for
• CPC Class Codes: G02F 2001/1502 complementary cell
• CPC Class Codes: G02F 2001/15145 the electrochromic layer comprises a mixture of anodic and cathodic compounds
• CPC Class Codes: H05B 33/00 Electroluminescent light sources

Claims

1. A COLOR-REVERSAL ELECTROCHROMIC DEVICE COMPRISING:

(A) A UNIT CELL DEFINING A VOLUME HAVING A FRONT TRANSPARENT AREA ELECTRODE SPACED FORM A FACING BACK AREA ELECTRODE, (B) MEANS FOR APPLYING A COLOR-FORMING POTENTIAL ACROSSS SAID CELL WITH MEANS FOR REVERSING ELECTRODE POLARITY, (C) AN ELECTROLYTICALLY-CONDUCTIVE COLOR CHANGE COMPOSITION OCCUPING SAID VOLUME WHICH COMPRISES;

(1) A REDUCTANT/OXIDANT PAIR WHERE (A) SAID REDUCTANT IS A MEMBER OF A REDOX COUPLE, THAT IS, SAID REDUCTANT IS ANODICALLY OXIDIZABLE AND CATHODICALLY REGENERATABLE, (B) SAID OXIDANT IS A MEMBER OF A REDOX COUPLE, THAT IS, SAID MEMBER IS CATHODICALLY REDUCIBLE AND ANODICALLY REGENERATABLE, (C) AT LEAST ONE OF SAID REDOX COUPLES IS A COLOR CHANGE COUPLE, THAT IS, THE REDOX MEMBERS ARE DIFFERENTLY COLORED, (2) A COLOR CONTROL MEANS FOR PREVENTING VISUAL OBSERVATION OF THE REDOX COUPLE'"'"''"'"'S COLLORED SPECIES AT THE BACK ELECTRODE WHEN THE COLORED SPECIES IS BEING ELECTROLYTICALLY DECOLORED AT THE FROM ELECTRODE, AND (3) A FLUID ELECTROLYTE WHICH (A) SOLUBILIZES COLOR-IMPARTING AMOUNTS OF SAID REDOX COMPONENTS (B) IS INERT TO THE ELECTRODES AND THE REDOX COMPONENTS, AND (C) EXCLUSIVE OF THE REDOX COMPONENTS DOES NOT ELECTROLYZE IN PREFERENCE TO THE REDOX COMPONENTS AT COLOR-FORMING POTENTIALS.