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Device for Maintaining Constant Liquid Pressure in Electrochromic Module Disclosure Number: IPCOM000038617D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31

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Cox, AR Wood, JC [+details]


An electrochromic display module contains an enclosed liquid solution. It is found that the rate of loss of water from the module is greater when bubbles or cavitation are present. Bubbles also affect the electrical and optical performance of the cell. The module is therefore maintained at a low positive pressure to prolong lifetime by reducing the extent of solvent loss, at the same time improving performance. This pressure is maintained by a spring-loaded conical diaphragm formed as part of an hermetic seal in one wall of the module. In the illustration of the electrochromic display module, Fig. 1 is a pictorial view while Figs. 2 and 3 are side elevations. The module includes liquid solution 1 trapped between upper glass wall 2 and body 3.