Output Amplifier of Source Driver
AssigneeHimax Technologies Limited
InventorChen-Yu Wang
Life of this patent
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Abstract
An output amplifier includes an amplifier circuit, an output stage circuit, a first switch transistor, and a second switch transistor. The amplifier circuit is used for amplifying an input pixel signal to generate the inverted signal and the non-inverted signal. The output stage circuit has a first output terminal for passing a supply voltage from a supply terminal or passing a ground voltage from a ground terminal to the pixel circuit according to the inverted signal and the non-inverted signal. The first switch transistor passes or blocks the supply voltage according to a high impedance signal, and the second switch transistor passes or blocks the ground voltage according to the inverted high impedance signal.
Claims11
An output amplifier of a source driver driving a pixel circuit of a panel, the output amplifier comprising:
- an amplifier circuit comprising an inverting terminal for providing a inverted signal, and comprising a non-inverting terminal for providing a non-inverted signal, wherein the amplifier circuit is used for amplifying an input pixel signal to generate the inverted signal and the non-inverted signal;
- an output stage circuit comprising a first output terminal for passing a supply voltage from a supply terminal or passing a ground voltage from a ground terminal to the pixel circuit according to the inverted signal and the non-inverted signal;
- a first switch transistor having a source and a body both electrically connected to the supply terminal, and having a drain electrically connected to the output stage circuit, wherein the first switch transistor passes or blocks the supply voltage according to a high impedance signal;
- and
- a second switch transistor having a source and a body both electrically connected to the ground terminal, and having a drain electrically connected to the output stage circuit, wherein the second switch transistor passes or blocks the ground voltage according to an inverted high impedance signal.
Dependencies are inferred from the claim text.