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US 11,694,632 B2Granted
Power voltage generator including charge pump, display apparatus including the same and method of generating power voltage using the same
AssigneeSamsung Display Co., Ltd.
InventorsYanguk Nam, Hyungrae Nam
Life of this patent
Estimating the term…
Abstract
A power voltage generator includes a charge pump and a regulator. The charge pump generates a charge pumping voltage. The charge pumping voltage has a headroom margin which is automatically set. The charge pumping voltage is varied based on a target voltage. The regulator generates a power voltage based on the charge pumping voltage.
Claims16
A power voltage generator comprising:
- a charge pump which generates a charge pumping voltage;
- and
- a regulator which generates a power voltage based on the charge pumping voltage,
- wherein the charge pumping voltage is set to be a voltage obtained by subtracting a headroom margin from a target voltage of the power voltage generated from the regulator,
- wherein the headroom margin is automatically set based on an output load of the power voltage generated from the regulator,
- wherein an absolute value of the charge pumping voltage increases as an absolute value of the target voltage increases, and
- wherein when the target voltage is fixed, an absolute value of the charge pumping voltage increases as the output load increase.
4 more elements
A display apparatus comprising:
- a display region which displays an image;
- a gate driver which provides a gate signal to the display region;
- a data driver which provides a data voltage to the display region;
- and
- a power voltage generator which outputs a power voltage to at least one selected from the display region, the gate driver and the data driver,
- wherein the power voltage generator comprises:
- a charge pump which generates a charge pumping voltage;
- and
- a regulator which generates the power voltage based on the charge pumping voltage,
- wherein the charge pumping voltage is set to be a voltage obtained by subtracting a headroom margin from a target voltage of the power voltage generated from the regulator,
- wherein the headroom margin is automatically set based on an output load of the power voltage generated from the regulator,
- wherein an absolute value of the charge pumping voltage increases as an absolute value of the target voltage increases, and
- wherein when the target voltage is fixed, an absolute value of the charge pumping voltage increases as the output load increases.
10 more elements
A method of generating a power voltage, the method comprising:
- generating a charge pumping voltage;
- and
- generating the power voltage based on the charge pumping voltage,
- wherein the charge pumping voltage is set to be a voltage obtained by subtracting a headroom margin from a target voltage of the power voltage generated from the regulator,
- wherein the headroom margin is automatically set based on an output load of the power voltage generated from the regulator,
- wherein an absolute value of the charge pumping voltage increases as an absolute value of the target voltage increases, and
- wherein when the target voltage is fixed, an absolute value of the charge pumping voltage increases as the output load increases.
4 more elements
Dependencies are inferred from the claim text.