Patent ID: 11942045
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A method of driving a display device, the method comprising:
determining whether to operate in a variable frame mode;
synchronizing a refresh rate of the display device with a variable frame rate of image data whet operating in the variable frame mode;
controlling a magnitude of a sensing initialization voltage applied to pixels based on a frame rate value in the variable frame mode;
providing a first voltage control signal from a controller to a power supply voltage generation circuit to control the magnitude of the sensing initialization voltage;
providing a second voltage control signal from the controller to the power supply voltage generation circuit to control the magnitude of the sensing initialization voltage;
generating a first reference voltage according to the first voltage control signal;
generating a second reference voltage according to the second voltage control signal, wherein the second reference voltage is higher than the first reference voltage; and
displaying an image based on the sensing initialization voltage,
wherein, when operating in the variable frame mode, controlling the magnitude of the sensing initialization voltage includes:
controlling the sensing initialization voltage to a first voltage level in a period in which a display panel is driven at a first frame rate for a frame of the image data having a first frame period, and
controlling the sensing initialization voltage to a second voltage level in a period in which the display panel is driven at a second frame rate for a frame of the image data having a second frame period different from the first frame period,

wherein the second voltage level is higher than the first voltage level and wherein the second frame rate is higher than the first frame rate, and
wherein controlling the magnitude of the sensing initialization voltage includes:
generating the sensing initialization voltage at the first voltage level in the period in which the display panel is driven at the first frame rate, and
generating the sensing initialization voltage at the second voltage level in the period in which the display panel is driven at the second frame rate.