Level shifter for flat panel display device
OwnerOh Kyong Kwon, Byong Deok Choiinventors
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Abstract
A level shifter for a flat panel display device is provided. The level shifter includes a first transistor coupled with a first power supply and having a gate and a drain are coupled together; and a capacitor coupled between an input voltage terminal and a first node coupled with the drain of the first transistor. The level shifter also includes a second transistor coupled with the first node to reset the capacitor; and a third transistor coupled to the first node, and coupled between a second power supply and an output voltage terminal. The level shifter also includes a fourth transistor to the first node, and coupled between an inverse input voltage terminal and the output voltage terminal.
Claims25
A level shifter for a flat panel display device, the level shifter comprising:
- a first transistor coupled with a first power supply, the first transistor having a gate and a drain that are coupled together;
- a capacitor coupled between an input voltage terminal and a first node coupled with the drain of the first transistor;
- a second transistor coupled with the first node and adapted to reset the capacitor;
- a third transistor having a gate coupled to the first node, wherein the third transistor is coupled between a second power supply and an output voltage terminal;
- and
- a fourth transistor having a gate coupled to the first node, wherein the fourth transistor is coupled between an inverse input voltage terminal and the output voltage terminal.
A level shifter for a flat panel display device, the level shifter comprising:
- a first transistor coupled with a ground voltage or a power supply, and having a gate and a drain coupled together;
- a capacitor coupled between an input voltage terminal and a first node coupled with the drain of the first transistor;
- a second transistor coupled between the first node and the ground voltage or the power supply to reset the capacitor;
- a third transistor having a gate coupled to the first node, wherein the third transistor is coupled between the power supply and an output voltage terminal;
- and
- a fourth transistor having a gate coupled to the first node, wherein the fourth transistor is coupled between an inverse input voltage terminal and the output voltage terminal.
A level shifter for a flat panel display device, the level shifter comprising:
- an initial charging part;
- and
- a plurality of level shifter parts individually coupled with the initial charging part,
- wherein each of the plurality of level shifter parts comprises:
- a first transistor having a gate adapted to receive a signal output from the initial charging part;
- a capacitor coupled between an input voltage and a first node to which a drain of the first transistor is coupled;
- a second transistor having a gate coupled to the first node, wherein the second transistor is coupled between a first power supply and an output voltage terminal;
- and
- a third transistor having a gate coupled to the first node, wherein the third transistor is coupled between an inverse input voltage terminal and the output voltage terminal.
A level shifter for a flat panel display device, the level shifter comprising:
- an initial charging part;
- and
- a plurality of level shifter parts individually coupled with the initial charging part,
- wherein each of the plurality of level shifter parts comprises:
- a first transistor having a gate adapted to receive a signal output from the initial charging part;
- a capacitor coupled between an inverse input voltage terminal and a first node coupled to a drain of the first transistor;
- a second transistor having a gate coupled to the first node, wherein the second transistor is coupled between a first power supply and an output voltage terminal;
- and
- a third transistor having a gate coupled to the first node, wherein the third transistor is coupled between an input voltage terminal and the output voltage terminal.
A level shifter for a flat panel display device, the level shifter comprising:
- an initial charging part comprising:
- a level-up circuit part for receiving a reset signal and an inverse reset signal to level up to a predetermined voltage and output the reset signal and the inverse reset signal;
- and
- a buffer part for stabilizing an output voltage of the level-up circuit part;
- and
- a plurality of level shifter parts individually coupled with the initial charging part,
- wherein each of the plurality of level shifter parts comprises:
- a first transistor having a gate adapted to receive a signal output from each of the initial charging parts, wherein the first transistor is coupled between a first node and a ground voltage or a power supply;
- a capacitor coupled between the first node and an input voltage terminal or an inverse input voltage terminal;
- a second transistor in which the gate is coupled to the first node, and wherein the second transistor is coupled between the power supply and an output voltage terminal;
- and
- a third transistor having a gate coupled to the first node, and coupled at a first end between the inverse input voltage or the input voltage terminal and coupled at a second end to the output voltage terminal.
Dependencies are inferred from the claim text.