Display device with different driving frequencies for still and moving images and method of driving the same
AssigneeSamsung Display Co., Ltd.
InventorsHyo Jin Lee, Sangan Kwon, Hui Nam, Jinyoung Roh, Sehyuk Park
Life of this patent
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Abstract
A display device includes a display panel including a plurality of pixels and a display panel driver configured to drive the display panel. Here, the display panel driver is configured to receive input image data, to drive the display panel at a first driving frequency when the input image data corresponds to a moving image, and to select one of a plurality of flicker lookup tables based on the first driving frequency and drive the display panel at a second driving frequency based on the flicker lookup table when the input image data corresponds to a still image.
Claims21
A display device comprising:
- a display panel including a plurality of pixels;
- and
- a display panel driver configured to drive the display panel, wherein the display panel driver is configured to receive input image data, to drive the display panel at a first driving frequency when the input image data corresponds to a moving image, and to select a flicker lookup table from among a plurality of flicker lookup tables based on the first driving frequency and drive the display panel at a second driving frequency based on the selected flicker lookup table when the input image data corresponds to a still image,
- wherein each of the plurality of flicker lookup tables stores candidates for the second driving frequency, which respectively correspond to grayscales of the input image data that is driven at the first driving frequency, and
- wherein the display panel driver determines one of the candidates as the second driving frequency based on the selected flicker lookup table.
A method of driving a display device comprising:
- receiving input image data;
- determining whether the input image data corresponds to a moving image or a still image;
- driving a display panel at a first driving frequency when the input image data corresponds to the moving image;
- selecting a flicker lookup table from among a plurality of flicker lookup tables based on the first driving frequency and determining a second driving frequency based on the selected flicker lookup table when the input image data corresponds to the still image;
- and
- driving the display panel at the second driving frequency when the input image data corresponds to the still image,
- wherein each of the plurality of flicker lookup tables stores candidates for the second driving frequency, which respectively correspond to grayscales of the input image data that is driven at the first driving frequency, and
- wherein one of the candidates is determined as the second driving frequency based on the selected flicker lookup table.
A method of driving a display device comprising:
- receiving input image data;
- determining that the input image data corresponds to a still image;
- looking up an intermediary second driving frequency in a reference flicker lookup table according to a first driving frequency;
- looking up a conversion coefficient in a conversion coefficient lookup table according to the first driving frequency;
- determining a second driving frequency by multiplying the intermediary second driving frequency by the conversion coefficient;
- and
- driving a display panel at the second driving frequency.
Dependencies are inferred from the claim text.