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US 12,700,343 B2Granted
Power supply circuit and display device including the same
AssigneeLG Display Co., Ltd.
InventorsTae Hwa Park, Hoon Jang
Life of this patent
Estimating the term…
Abstract
A display apparatus includes a display panel configured to display an image, a driver configured to drive the display panel, and a power supply including an output circuit configured to charge or discharge power input through an input terminal thereof to output through an output terminal thereof and an output controller configured to control charging or discharging of the output circuit, for supplying power to the display panel, wherein the output controller operates in one of a first driving mode of operating with a first switching frequency and a second driving mode of operating with a second switching frequency which is higher than the first switching frequency.
Claims16
A display apparatus comprising:
- a display panel configured to display an image;
- a driver configured to drive the display panel;
- and
- a power supply circuit for supplying power to the display panel, the power supply circuit including an output circuit and an output controller, the output circuit configured to charge or discharge a power input through an input terminal thereof and to output an power output through an output terminal thereof, and the output controller configured to control charging or discharging of the output circuit,
- wherein the output controller is configured to operate in one of a first driving mode of operating with a first switching frequency or a second driving mode of operating with a second switching frequency that is higher than the first switching frequency based on at least one of a current value or a voltage value of the power output through the output terminal of the output circuit, and
- wherein the output controller includes:
- a signal generator configured to generate a switch signal for controlling an on/off switching timing of each of switches included in the output circuit;
- an efficiency calculator configured to calculate an efficiency calculation result value, based on an input current value flowing through the input terminal of the output circuit and an output current value flowing through the output terminal of the output circuit;
- a mode controller configured to generate a mode control value, based on the efficiency calculation result value provided from the efficiency calculator and a mode setting result value provided based on a mode setting value set by an external input and a peak-to-peak voltage value provided in the output terminal of the output circuit;
- and
- a signal controller configured to generate a signal for controlling the signal generator, based on a sensing value obtained by sensing a voltage output through the output terminal of the output circuit, an inductor current value output through an inductor of the output circuit, and the mode control value output from the mode controller.
8 more elements
A power supply circuit comprising:
- an output circuit configured to charge or discharge power input through an input terminal thereof and to output a power output through an output terminal thereof;
- and
- an output controller configured to control charging or discharging of the output circuit,
- wherein the output controller operates in one of a first driving mode of operating with a first switching frequency or a second driving mode of operating with a second switching frequency that is higher than the first switching frequency based on a current value or a voltage value of the power output through the output terminal of the output circuit, and
- wherein the output controller comprises:
- a signal generator configured to generate a switch signal for controlling an on/off switching timing of each of switches included in the output circuit;
- an efficiency calculator configured to calculate an efficiency calculation result value, based on an input current value flowing through the input terminal of the output circuit and an output current value flowing through the output terminal of the output circuit;
- a mode controller configured to generate a mode control value, based on the efficiency calculation result value provided from the efficiency calculator and a mode setting result value provided based on a mode setting value set by an external input and a peak-to-peak voltage value provided in the output terminal of the output circuit;
- and
- a signal controller configured to generate a signal for controlling the signal generator, based on a sensing value obtained by sensing a voltage output through the output terminal of the output circuit, an inductor current value output through an inductor of the output circuit, and the mode control value output from the mode controller.
7 more elements
A display apparatus comprising:
- a display panel configured to display an image;
- a driver configured to drive the display panel;
- and
- a power supply circuit for supplying power to the display panel, the power supply circuit including an output circuit and an output controller, the output circuit configured to charge or discharge a power input through an input terminal thereof and to output an power output through an output terminal thereof, and the output controller configured to control charging or discharging of the output circuit,
- wherein the output controller is configured to operate in one of a first driving mode of operating with a first switching frequency or a second driving mode of operating with a second switching frequency that is higher than the first switching frequency,
- wherein the output controller includes:
- a signal generator configured to generate a switch signal for controlling an on/off switching timing of each of switches included in the output circuit;
- an efficiency calculator configured to calculate an efficiency calculation result value, based on an input current value flowing through the input terminal of the output circuit and an output current value flowing through the output terminal of the output circuit;
- a mode controller configured to generate a mode control value, based on the efficiency calculation result value provided from the efficiency calculator and a mode setting result value provided based on a mode setting value set by an external input and a peak-to-peak voltage value provided in the output terminal of the output circuit;
- and
- a signal controller configured to generate a signal for controlling the signal generator, based on a sensing value obtained by sensing a voltage output through the output terminal of the output circuit, an inductor current value output through an inductor of the output circuit, and the mode control value output from the mode controller.
8 more elements
Dependencies are inferred from the claim text.