Patent ID: 7821512
Filing Date: 2010-10-26
Classification: G09G,H02M

Abstract:
1. An apparatus for generating an analog driving voltage comprising: a ripple amplitude determining unit configured to compare a ripple amplitude of an analog driving voltage with a given reference voltage, the given reference voltage corresponding to a preset ripple amplitude reference value, and configured to determine a ripple level of the analog driving voltage; an analog driving voltage generating unit configured to adjust a DC voltage level of the analog driving voltage based on the determined ripple level of the analog driving voltage, wherein the ripple amplitude determining unit includes a storing unit configured to store the ripple amplitude reference value, the amplitude reference value being preset based on load characteristics of the liquid crystal display panel; a reference voltage generator configured to generate the given reference voltage based on the ripple amplitude reference value; and a ripple detecting circuit configured to compare the ripple amplitude of the analog driving voltage with the given reference voltage based on load characteristics of a liquid crystal display panel to generate ripple information.