Programmable level shifter for LCD systems
A programmable level shifter for providing upshifted control signals to an active matrix display based on logic-level control signals received from a timing controller. The programmable level shifter includes a programmable state machine, level-shifting output drivers, and a programming interface. The programmable state machine is configured to receive at least one control signal from a timing controller. The state machine generates, based on said at least one control signal, a plurality of outputs for driving gate drivers of the active matrix display. The level-shifting output drivers convert the plurality of outputs generated by the programmable state machine to a higher-magnitude voltage level. The programming interface facilitates the programming of aspects of the programmable state machine.
1. A display system comprising:
a matrix display comprising a pixel array and gate drivers operable to drive at least a portion of the pixel array; and
a programmable level shifter operable to receive at least one control signal from a timing controller having a programmable state machine and operable to generate, based on said at least one control signal, outputs for driving the gate drivers of the matrix display, wherein the outputs for driving the gate drivers of the matrix display are level-shifted to a voltage having a higher magnitude than the at least one control signal received from the timing controller, the programmable state machine comprising:
a memory storing output sequences and data representing a state of the outputs in at least one of the output sequences; and
an address decoding block configured to decode the at least one control signal received from the timing controller to determine an address of a memory location in the memory, the data in the determined memory location are output to the level-shifting output drivers corresponding to the at least one of the output sequences.
2. The display system of claim 1 wherein the matrix display comprises a liquid crystal display.
3. The display system of claim 1 , further comprising a timing controller operable to provide the at least one control signal to the programmable level shifter.
4. The display system of claim 1 wherein the programmable level shifter is operable to generate, based on the at least one control signal, the at least one of the output sequences.
5. A programmable level shifter for providing upshifted control signals to a matrix display, the programmable level shifter comprising:
a programmable state machine operable to receive at least one control signal from a timing controller, and operable to generate, based on said at least one control signal, outputs for driving gate drivers of the matrix display, the programmable state machine comprising:
a memory storing output sequences and data representing a state of the outputs in at least one of the output sequences; and
an address decoding block configured to decode the at least one control signal received from the timing controller to determine an address of a memory location in the memory, the data in the determined memory location are output to the level-shifting output drivers corresponding to the at least one of the output sequences.