Source driver circuit, method of operating same, and display device for reducing power consumed by non-display area of display panel
AssigneeSamsung Electronics Co., Ltd.
InventorChulho Choi
Life of this patent
Estimating the term…
Abstract
A source driver circuit includes a receiver, a plurality of amplifying buffers, and a control logic circuit. The receiver receives a data signal and a control signal through an input terminal. Each of the amplifying buffers outputs a driving signal generated based on the image data signal through an output terminal. The control logic circuit controls the receiver and the plurality of amplifying buffers based on the control signal. When a power-down signal is provided to the receiver, the control logic circuit is to turn off at least one of the receiver and the plurality of amplifying buffers.
Claims20
A source driver circuit, comprising:
- a receiver;
- a plurality of amplifying buffers, each of the plurality of amplifying buffers including a respective output terminal to output a driving signal;
- and
- a control circuit to control the receiver and the plurality of amplifying buffers, and to control a first non-display voltage to be provided to the output terminal of each of the plurality of amplifying buffers,
- wherein, when the receiver receives a power-down signal, the control circuit is to turn off at least one of the plurality of amplifying buffers and to control the first non-display voltage such that the first non-display voltage is provided to the output terminal of each of the plurality of amplifying buffers and the source driver circuit outputs the first non-display voltage through the output terminal of each of the plurality of amplifying buffers, to drive a non-display area of a display panel.
A method of operating a source driver circuit, the method comprising:
- receiving a power-down signal while outputting a driving signal through an output terminal of an amplifying buffer included in the source driver circuit;
- turning off the amplifying buffer in response to the power-down signal;
- providing a first non-display voltage to the output terminal in response to the power-down signal;
- and
- outputting the first non-display voltage through the output terminal, to drive a non-display area of a display panel.
A display device, comprising:
- a display panel including an area on which a user image or a non-display image is displayed;
- and
- a source driver circuit including a plurality of amplifying buffers, each of the plurality of amplifying buffers to output a driving signal to the display panel through a respective output terminal such that the user image is displayed on the area,
- wherein, when the source driver circuit receives a power-down signal, the source driver circuit is to:
- turn off at least one of the plurality of amplifying buffers, and
- output a first non-display voltage to the display panel through the output terminal of each of the plurality of amplifying buffers such that the non-display image is displayed on the area.
Dependencies are inferred from the claim text.