Patent ID: 7830351

Claim:
An LCD gate driver circuitry having an adjustable current driving capacity for use with different display panels, each display panel having a plurality of pixels controllable by a plurality of pixel switching elements, each pixel switching element having a control end connected to a gate line, each pixel associated with a pixel load, said circuitry comprising: an input line for receiving a control signal representative of a state of pixel in the display panel associated with the gate line; an output line for supplying electrical current to the gate line; a first gate driver stage comprising at least one switching element connected to said input line and an output connected to said output line for providing a first signal pulse to said output line in response to the control signal, the first signal pulse arranged to deliver a first current to the gate line, the first signal pulse having a first pulse width; and one or more additional gate driver stages, each of said one or more additional gate driver stages comprising a different switching element connected in parallel with said first gate driver stage, an output connected to said output line, and a different input separated from the input line and arranged to receive a different bias signal separately from the control signal, said different switching element arranged for separately producing a separate second signal pulse in response to the different bias signal, wherein the separate second signal pulse is arranged to deliver a second current at the output, and the separate second signal pulse has an independently adjustable second pulse width, based on the different bias signal, such that the second pulse width is smaller than or equal to the first pulse width, and wherein the current supplied to the gate line is a sum of the first current produced by said first gate driver stage and the second current produced by each of said one or more additional gate driver stages, wherein said at least one switching element comprises a complementary switching element pair having an input end arranged to receive the control signal for producing the first signal pulse in response to the control signal.