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US 10,504,434 B2Granted
DC-DC converter and display device having the same
AssigneeSamsung Display Co., Ltd.
InventorHak-Ki Choi
Life of this patent
Estimating the term…
Abstract
A DC-DC converter includes a plurality of converters and a discharging circuit. The converters convert an input power voltage from an input terminal to a plurality of output power voltages for output to a plurality of output terminals. The discharging circuit is between the input terminal and the converters and discharges of voltages of the output terminals based on a discharging control signal.
Claims17
A DC-DC converter having an input terminal and a plurality of output terminals, comprising:
- a plurality of converters to convert an input power voltage at the input terminal to a plurality of output power voltages at the plurality of output terminals;
- and
- a single discharging circuit between the input terminal and the converters, the single discharging circuit to discharge the plurality of output power voltages at the plurality of output terminals based on a single discharging control signal, wherein the single discharging circuit includes:
- a first switch between a first node directly connected to the converters and a reference terminal, the first switch to turn on based on the single discharging control signal, and
- a second switch between the input terminal and the first node, the second switch to turn off based on the single discharging control signal,
- wherein, while the single discharging control signal is applied, the plurality of output terminals are connected to the reference terminal through the first switch such that the plurality of output power voltages at the plurality of output terminals are substantially simultaneously discharged through the first switch of the single discharging circuit.
3 more elements
A display device, comprising:
- a display panel including a plurality of pixels;
- a scan driver to provide a scan signal to the pixels;
- a data driver to provide a data signal to the pixels;
- and
- a DC-DC converter to generate a plurality of output power voltages to be provided to the pixels, and having an input terminal and a plurality of output terminals, wherein the DC-DC converter includes:
- a plurality of converters to convert an input power voltage at the input terminal to the plurality of output power voltages at the plurality of output terminals;
- and
- a single discharging circuit between the input terminal and the converters, the single discharging circuit to discharge the plurality of output power voltages at the plurality of output terminals based on a single discharging control signal, wherein the single discharging circuit includes:
- a first switch between a first node directly connected to the converters and a reference terminal, the first switch to turn on based on the single discharging control signal, and
- a second switch between the input terminal and the first node, the second switch to turn off based on the single discharging control signal,
- wherein, while the single discharging control signal is applied, the plurality of output terminals are connected to the reference through the first switch of the single discharging circuit such that the plurality of output power voltages at the plurality of output terminals are substantially simultaneously discharged through the first switch of the single discharging circuit.
8 more elements
A DC-DC converter having an input terminal and a plurality of output terminals, comprising:
- a plurality of converters to convert a first power voltage at the input terminal to a plurality of second power voltages for output to pixels of a display device through the plurality of output terminals;
- and
- a single discharging circuit to discharge the plurality of second power voltages at the plurality of output terminals based on a single discharging control signal, wherein the second power voltages are different from one another and wherein the single discharging control signal is generated when a power mode of the display device switches from a first state to a second state, wherein the single discharging circuit includes:
- a first switch between a first node directly connected to the converters and a reference terminal, the first switch to turn on based on the single discharging control signal, and
- a second switch between the input terminal and the first node, the second switch to turn off based on the single discharging control signal,
- wherein, while the single discharging control signal is applied, the plurality of output terminals are connected to the reference terminal through the first switch of the single discharging circuit such that the plurality of second power voltages at the plurality of output terminals are substantially simultaneously discharged through the first switch of the single discharging circuit.
3 more elements
Dependencies are inferred from the claim text.