Apparatus and method for driving display

摘要

An apparatus for driving a display includes a shift register, a first latch unit, a second latch unit, a data comparison unit and a level select unit. The shift register generates multiple latch signals according to a sync signal. The first latch unit latches a data signal in response to the latch signals to obtain multiple first data corresponding to multiple channels. The second latch unit is coupled to the first latch unit and latches the first data of the channels as multiple second data in response to a latch data signal. The data comparison unit responds to the latch data signal to respectively compare the first data and the second data corresponding to the same channel to output multiple third data corresponding to the channels. The level select unit selects multiple voltage levels corresponding to the channels according to the third data.

主权项

1. An apparatus for driving a display, comprising:
a shift register for generating a plurality of latch signals according to a sync signal; a first latch unit for latching a data signal in response to the latch signals to obtain a plurality of first data corresponding to a plurality of channels; a second latch unit coupled to the first latch unit and for latching the first data corresponding to the channels as a plurality of second data in response to a latch data signal; a data comparison unit connected to the first latch unit and the second latch unit, for receiving the first data from the first latch unit and receiving the second data from the second latch unit and comparing the first data with the second data corresponding to the same channels to output a plurality of third data corresponding to the channels; and a level select unit for selecting a plurality of voltage levels corresponding to the channels, according to the third data; wherein when a difference between a first voltage level of the first data and a second voltage level of the second data exceeds a default value, a third voltage level of the third data lies between the first voltage level and the second voltage level; wherein when the first voltage level of the first data is different from the second voltage level of the second data and the difference between the first voltage level of the first data and the second voltage level of the second data does not exceed the default value, the third voltage level of the third data is equal to the first voltage level.