Patent ID: 9081247
Filing Date: 2015-07-14
Classification: G02F

Abstract:
1. A controller for controlling the optical state of a thin film electrochromic device, the controller comprising: circuitry for applying voltage or providing instructions to apply voltage between bus bars on the thin film electrochromic device; a processing component designed or configured to perform the following operations: (i) determine that the thin film electrochromic device should transition from a first optical state to a second optical state; and (ii) provide a first applied voltage between the bus bars on the thin film electrochromic device in response to determining that the thin film electrochromic device should transition from the first optical state to the second optical state, wherein the first applied voltage has a magnitude such that the area of the thin film electrochromic device between the bus bars experiences an effective voltage between a maximum effective voltage that avoids damaging the thin film electrochromic device and a minimum effective voltage that drives the transition from the first optical state to the second optical state, and wherein the first applied voltage is greater than the maximum effective voltage.