Patent ID: 9293080
Filing Date: 2016-03-22
CPC Classification: G09G

Claim Text:
1. A data line driving circuit configured to be included in an active matrix-type display device having a plurality of pixel circuits arranged in a matrix, the data line driving circuit comprising: a driving signal generating circuit that receives from outside an image signal representing an image to be displayed, and outputs a driving signal corresponding to said image signal; an output circuit configured to be connected, via a connection node, to a data line connected to at least one of said plurality of pixel circuits in the active matrix-type display device so as to drive said data line; a current detecting and controlling circuit configured to be connected to said data line via said connection node, the current detecting and controlling circuit detecting a current flowing in said data line, and comparing said detected current in said data line with a target value that is determined in accordance with said driving signal, the current detecting and controlling circuit receiving a ramp signal having a voltage monotonically increasing from a minimum possible value for the driving signal to a maximum possible value for the driving signal, and supplying said ramp signal to said output circuit until a substantial match is found in said comparison so that said ramp signal is provided to said data line from the output circuit until then, said current detecting and controlling circuit maintaining a voltage of said ramp signal that was reached when the substantial match is found in said comparison and supplying said maintained voltage of said ramp signal to the output circuit so that said maintained voltage is provided to said data line.