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US 2020/0349890 A1Published application
Data driver and data voltage setting method thereof
AssigneeSamsung Display Co., Ltd.
InventorJung Kook PARK
Life of this patent
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Abstract
A data driver includes a first and second data voltage generator and a third data voltage generator. The first and second data voltage generator generates a first data voltage corresponding to a first grayscale value and a second data voltage corresponding to a second grayscale value lower than the first grayscale value based on a reference voltage. The third data voltage generator generates a third data voltage corresponding to a third grayscale value lower than the second grayscale value based on a voltage level difference between the first data voltage and the second data voltage.
Claims11
A data driver, comprising:
- a first and second data voltage generator to generate a first data voltage corresponding to a first grayscale value and a second data voltage corresponding to a second grayscale value lower than the first grayscale value based on a reference voltage;
- and
- a third data voltage generator to generate a third data voltage corresponding to a third grayscale value lower than the second grayscale value based on a voltage variation and a voltage level difference between the first data voltage and the second data voltage,
- wherein the data driver is to supply at least one of the first data voltage, the second data voltage, or the third data voltage to a display panel including first to third pixels to emit light of different wavelengths,
- wherein the voltage level difference comprises a first sub voltage level difference corresponding to the first pixel, a second sub voltage level difference corresponding to the second pixel, and a third sub voltage level difference corresponding to the third pixel, and
- wherein the voltage variation comprises a first sub voltage variation corresponding to the first pixel, a second sub voltage variation corresponding to the second pixel, and a third sub voltage variation corresponding to the third pixel, and
- wherein when the second sub voltage level difference is greater than a first reference voltage level difference and less than a second reference voltage level difference, each of the first sub voltage variation, the second sub voltage variation, and the third sub voltage variation is greater than a corresponding one of the first sub voltage variation, the second sub voltage variation, and the third sub voltage variation when the second sub voltage level difference is less than the first reference voltage level difference, and is less than the corresponding one of the first sub voltage variation, the second sub voltage variation, and the third sub voltage variation when the second sub voltage level difference is greater than the second reference voltage level difference.
4 more elements
A method for controlling a data driver, the method comprising:
- correcting a first data voltage and a second data voltage corresponding a first grayscale value and a second grayscale value, respectively, by optical measurement;
- generating a third data voltage corresponding to a third grayscale value based on a voltage variation and a voltage level difference between the first data voltage and the second data voltage;
- and
- supplying the first data voltage to the third data voltage from the data driver to a display panel comprising first, second, and third pixels to emit light of different wavelengths,
- wherein the second grayscale value is lower than the first grayscale value and higher than the third grayscale value,
- wherein the voltage level difference comprises a first sub voltage level difference corresponding to the first pixel, a second sub voltage level difference corresponding to the second pixel, and a third sub voltage level difference corresponding to the third pixel, and
- wherein the voltage variation comprises a first sub voltage variation corresponding to the first pixel, a second sub voltage variation corresponding to the second pixel, and a third sub voltage variation corresponding to the third pixel, and
- wherein when the second sub voltage level difference is greater than a first reference voltage level difference and less than a second reference voltage level difference, each of a first sub voltage variation, second sub voltage variation, and third sub voltage variation is greater than a corresponding one of the first sub voltage variation, the second sub voltage variation, and the third sub voltage variation when the second sub voltage level difference is less than the first reference voltage level difference, and is less than the corresponding one of the first sub voltage variation, the second sub voltage variation, and the third sub voltage variation when the second sub voltage level difference is greater than the second reference voltage level difference.
5 more elements
Dependencies are inferred from the claim text.