Patent ID: 8378927
Filing Date: 2013-02-19
Classification: G09G

Abstract:
1. An apparatus for driving an electrochromic device (ECD), comprising: a driving voltage output unit for selectively applying a coloring voltage or a decoloring voltage between upper and lower electrodes of an ECD; a timer for counting an applying time of the coloring or decoloring voltage in a memory type driving mode and then outputting a voltage application completion signal after the counted time exceeds a preset time, the timer bypassing the counting operation in a non-memory type driving mode; and a driving controller for selectively inputting a coloring signal or a decoloring signal to the driving voltage output unit such that the driving voltage output unit is controlled to output a coloring or decoloring voltage corresponding to the signal, the driving controller receiving the voltage application completion signal to stop the input of the coloring or decoloring signal, wherein the timer includes: a coloring timer for counting a voltage applying time when the coloring voltage is applied to the upper and lower electrodes of the ECD and then outputting a voltage application completion signal in case the counted voltage applying time reaches a preset coloring continuing time in the memory type driving mode, the coloring timer bypassing the time counting operation in the non-memory type driving mode; and a decoloring timer for counting a voltage applying time when the decoloring voltage is applied to the upper and lower electrodes of the ECD and then outputting a voltage application completion signal when the counted voltage applying time reaches a preset decoloring continuing time in the memory type driving mode, the decoloring time bypassing the time counting operation in the non-memory type driving mode.