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US 12,706,017 B2Granted
Display device including a load switch, and electronic device
AssigneeSamsung Display Co., Ltd.
InventorsKihyun Pyun, Dae-Sik Lee
Life of this patent
Estimating the term…
Abstract
A display device includes a display panel including pixels, a low-dropout circuit configured to generate an internal power supply voltage in response to a low-dropout enable signal, and to provide the internal power supply voltage to the pixels through a power supply line, a load switch circuit configured to receive an external power supply voltage, and to selectively provide the external power supply voltage to the power supply line in response to a load switch enable signal, and a controller configured to generate the low-dropout enable signal and the load switch enable signal.
Claims18
A display device comprising:
- a display panel comprising pixels;
- a low-dropout circuit configured to generate an internal power supply voltage in response to a low-dropout enable signal, and to provide the internal power supply voltage to the pixels through a power supply line;
- a load switch circuit configured to receive an external power supply voltage, and to selectively provide the external power supply voltage to the power supply line in response to a load switch enable signal;
- and
- a controller configured to generate the low-dropout enable signal and the load switch enable signal,
- wherein the load switch circuit comprises:
- first transistors connected in parallel between the power supply line and an external power supply circuit configured to generate the external power supply voltage;
- and
- a second transistor configured to selectively turn on the first transistors in response to the load switch enable signal.
6 more elements
A display device comprising:
- a display panel comprising pixels;
- a low-dropout circuit configured to generate an internal power supply voltage in response to a low-dropout enable signal, and to provide the internal power supply voltage to the pixels through a power supply line;
- a load switch circuit configured to receive an external power supply voltage, and to selectively provide the external power supply voltage to the power supply line in response to a load switch enable signal, and comprising:
- a first transistor comprising a control electrode, a first terminal connected to an external power supply circuit configured to generate the external power supply voltage, and a second terminal connected to the power supply line;
- a first resistor;
- a second transistor comprising a control electrode configured to receive the load switch enable signal through the first resistor, a first terminal, and a second terminal configured to receive a ground voltage;
- a second resistor connected between the first terminal of the second transistor and the control electrode of the first transistor;
- a capacitor connected between the first terminal of the first transistor and the second resistor;
- and
- a third resistor connected in parallel with the capacitor;
- and
- a controller configured to generate the low-dropout enable signal and the load switch enable signal.
9 more elements
An electronic device comprising:
- a host device comprising an external power supply circuit configured to generate an external power supply voltage;
- and
- a display device configured to receive input image data and the external power supply voltage from the host device, and comprising:
- a display panel comprising pixels;
- a low-dropout circuit configured to generate an internal power supply voltage in response to a low-dropout enable signal, and to provide the internal power supply voltage to the pixels through a power supply line;
- a load switch circuit configured to receive the external power supply voltage, and to selectively provide the external power supply voltage to the power supply line in response to a load switch enable signal;
- and
- a controller configured to generate the low-dropout enable signal and the load switch enable signal,
- wherein the load switch circuit comprises:
- first transistors connected in parallel between the power supply line and the external power supply circuit;
- and
- a second transistor configured to selectively turn on the first transistors in response to the load switch enable signal.
9 more elements
Dependencies are inferred from the claim text.