Patent ID: 7750898

Claim:
Apparatus comprising: a plurality of output buffers for driving the columns of an LCD panel; a bias generator providing a common biasing current (I bias ) to all of said output buffers; means for providing information regarding the physical position of a dot to be driven on the LCD panel by counting the number of incoming load signals; and a switchable current source for changing the level of the biasing current (I bias ) according to the physical position such that only a first level of the biasing current (I bias ) is provided to the output buffers when the dot is at a particular physical position and only a second level of the biasing current (I bias ) is provided to the output buffers when the dot is at another physical position that is further away from the output buffers than the particular physical position, the second level of the biasing current (I bias ) being higher than the first level of the biasing current (I bias ).