Organic light emitting display apparatus using dithering and method of driving the same
AssigneeSamsung Display Co., Ltd.
InventorsSeungho Park, Baekwoon Lee
Life of this patent
Estimating the term…
Abstract
An organic light emitting display apparatus includes a first data line, a comparator, and a data generator. The first data line is connected to a first pixel. The comparator compares first image data of input image data to at least one of a first critical grayscale value or a second critical grayscale value, where the first image data corresponds to the first pixel. The data generator determines the first critical grayscale value or the second critical grayscale value as first corrected image data when the first image data is equal to or greater than the first critical grayscale value but lower than the second critical grayscale value.
Claims20
An organic light emitting display apparatus, comprising:
- a display including a first data line connected to a first pixel;
- a comparator to compare first image data of input image data to a first critical grayscale value and a second critical grayscale value, the first image data corresponding to the first pixel;
- a data generator to determine one of the first critical grayscale value or the second critical grayscale value as first corrected image data such that the first image data are dithered by using only the first critical grayscale value and the second critical grayscale value of the first corrected image data when the first image data is not less than the first critical grayscale value but not more than the second critical grayscale value;
- a source driver to output a data signal corresponding to input data to the first data line;
- and
- an output to output the first corrected image data to the source driver.
A method for driving an organic light emitting display apparatus, the method comprising:
- receiving first image data corresponding to a first pixel;
- determining a position of the first pixel;
- comparing the first image data with a first critical grayscale value;
- and
- when the first image data ranges not less than a lowest grayscale value but not more than the first critical grayscale value, setting one of the lowest grayscale value or the first critical grayscale value as first corrected image data such that the first image data are dithered by using only the lowest critical grayscale value and the first critical grayscale value of the first corrected image data based on a dithering algorithm and the determined position of the first pixel, and
- when the first image data is greater than the first critical grayscale value but equal to or lower than a highest grayscale value, setting the first image data as the first corrected image data without correcting the first image data.
Dependencies are inferred from the claim text.