Amplifier for driving display panel and related control method
AssigneeNovatek Microelectronics Corp.
InventorsJhih-Siou Cheng, Ju-Lin Huang
Life of this patent
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Abstract
An amplifier for driving a display panel includes an input stage, a gain stage and an output stage. The gain stage is coupled to the input stage. The output stage, coupled to the gain stage, includes a first output driving circuit and a second output driving circuit. The first output driving circuit is operated in a first voltage domain. The second output driving circuit is operated in a second voltage domain different from the first voltage domain.
Claims8
An amplifier for outputting a display data to drive a display panel, comprising:
- an input stage;
- a gain stage, coupled to the input stage;
- and
- an output stage, coupled to the gain stage, comprising:
- a first output driving circuit, operated in a first voltage domain, the first output driving circuit comprising:
- a first transistor, coupled between a high power supply terminal and an output terminal of the amplifier;
- and
- a second transistor, coupled between a medium power supply terminal and the output terminal of the amplifier;
- and
- a second output driving circuit, operated in a second voltage domain different from the first voltage domain, the second output driving circuit comprising:
- a third transistor, coupled between the medium power supply terminal and the output terminal of the amplifier;
- and
- a fourth transistor, coupled between a low power supply terminal and the output terminal of the amplifier.
A method for controlling an amplifier for outputting a display data to drive a display panel, the amplifier having an output stage configured to be operated in one of a plurality of operation modes, the method comprising:
- detecting the display data to be output to the display panel;
- and
- setting the output stage to be in one of the plurality of operation modes according to the display data;
- wherein the step of setting the output stage to be in one of the plurality of operation modes according to the display data comprises:
- setting the output stage to be in a high-voltage mode among the plurality of operation modes when the display data is higher than a first threshold;
- setting the output stage to be in a low-voltage mode among the plurality of operation modes when the display data is lower than a second threshold;
- and
- setting the output stage to be in a mid-voltage mode among the plurality of operation modes when the display data is between the first threshold and the second threshold.
Dependencies are inferred from the claim text.