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US 7,733,314 B2Granted
Display device
AssigneeSamsung Electronics Co., Ltd.
InventorHyun-Sang Cho
Life of this patent
Estimating the term…
Abstract
In a display device, a first image processor outputs a first pretilt gray scale in response to a first external image signal during a first pretilt period and a second image processor outputs a second pretilt gray scale higher than the first pretilt gray scale in response to a second external image signal during a second pretilt period. A gamma reference voltage generator outputs a gamma reference voltage. A data driver outputs a first pretilt voltage by converting the first pretilt gray scale into the first pretilt voltage and outputs a second pretilt voltage identical to the first pretilt voltage by converting the second pretilt gray scale into the second pretilt voltage.
Claims20
A display device comprising:
- a first image processor which outputs a first pretilt signal in response to a first external image signal during a first pretilt period, the first pretilt signal corresponding to a first gray scale;
- a second image processor which outputs a second pretilt signal in response to a second external image signal during a second pretilt period, the second pretilt signal corresponding to a second gray scale higher than the first gray scale;
- a gamma reference voltage generator receiving which receives a power supply voltage from an exterior and outputs a gamma reference voltage;
- a data driver which converts the first pretilt signal into a first voltage based on the gamma reference voltage and outputs the first voltage during the first pretilt period, and which converts the second pretilt signal into a second voltage based on the gamma reference voltage and outputting outputs the second voltage during the second pretilt period, the second voltage being identical to the first voltage;
- a gate driver which outputs a first gate signal during the first pretilt period and a second gate signal during the second pretilt period;
- and
- a display unit which displays images using a plurality of pixels including first pixels receiving which receive the first voltage in response to the first gate signal during the first pretilt period and second pixels which receive the second voltage in response to the second gate signal during the second pretilt period.
4 more elements
A display device comprising:
- an image processor which outputs a first pretilt signal during a first pretilt period and a second pretilt signal during a second pretilt period in response to external image signals, the first pretilt signal corresponding to a first gray scale and the second pretilt signal corresponding to a second gray scale higher than the first gray scale;
- a gamma reference voltage generator receiving which receives a power supply voltage from an exterior and outputs a first and second gamma reference voltages;
- a data driver which converts the first pretilt signal into a first voltage based on the first gamma reference voltage and outputs the first voltage during the first pretilt period, and converts the second pretilt signal into a second voltage based on the second gamma reference voltage and outputting outputs the second voltage during the second pretilt period, the second voltage being identical to the first voltage;
- a gate driver which outputs a first gate signal during the first pretilt period and outputting outputs a second gate signal during the second pretilt period;
- and
- a display unit which displays images using a plurality of pixels including first pixels which receive the first voltage in response to the first gate signal during the first pretilt period and second pixels which receive the second voltage in response to the second gate signal during the second pretilt period.
3 more elements
A method of driving a display device, the method comprising:
- outputting a first pretilt signal in response to a first external image signal during a first pretilt period, the first pretilt signal corresponding to a first gray scale, wherein a first image processor outputs the first pretilt signal;
- outputting a second pretilt signal in response to a second external image signal during a second pretilt period, the second pretilt signal corresponding to a second gray scale higher than the first gray scale, wherein a second image processor outputs the second pretilt signal;
- receiving a power supply voltage from an exterior and outputting a gamma reference voltage, wherein a gamma reference voltage generator receives the power supply voltage and outputs the gamma reference voltage;
- converting the first pretilt signal into a first voltage based on the gamma reference voltage and outputting the first voltage during the first pretilt period, and converting the second pretilt signal into a second voltage based on the gamma reference voltage and outputting the second voltage during the second pretilt period, the second voltage being identical to the first voltage, wherein a data driver converts the first and second pretilt signals and outputs the first and second voltages;
- outputting a first gate signal during the first pretilt period and outputting a second gate signal during the second pretilt period, wherein a gate driver outputs the first and second gate signals;
- and
- displaying images using a plurality of pixels including first pixels receiving the first voltage in response to the first gate signal during the first pretilt period and second pixels receiving the second voltage in response to the second gate signal during the second pretilt period, wherein a display unit displays the images.
4 more elements
A display device comprising:
- a first image processor which outputs a first pretilt signal in response to a first external image signal during a first pretilt period, the first pretilt signal corresponding to a first gray scale;
- a second image processor which outputs a second pretilt signal in response to a second external image signal during a second pretilt period, the second pretilt signal corresponding to a second gray scale higher than the first gray scale;
- a gamma reference voltage generator which receives a power supply voltage from an exterior and outputs a gamma reference voltage;
- a data driver which converts the first pretilt signal into a first voltage based on the gamma reference voltage and outputs the first voltage during the first pretilt period, and which converts the second pretilt signal into a second voltage based on the gamma reference voltage and outputs the second voltage during the second pretilt period;
- a gate driver which outputs a first gate signal during the first pretilt period and a second gate signal during the second pretilt period;
- and
- a display unit which displays images using a plurality of pixels, each pixel of which includes a main pixel which receives the first voltage in response to the first gate signal during the first pretilt period and a sub pixel which receives the second voltage in response to the second gate signal during the second pretilt period,
- wherein a first transmittance of the main pixel during the first pretilt period is identical to a second transmittance of the sub pixel during the second pretilt period.
5 more elements
A display device comprising:
- an image processor which outputs a first pretilt signal during a first pretilt period and a second pretilt signal during a second pretilt period in response to external image signals, the first pretilt signal corresponding to a first gray scale and the second pretilt signal corresponding to a second gray scale higher than the first gray scale;
- a gamma reference voltage generator which receives a power supply voltage from an exterior and outputs a first gamma reference voltage and a second gamma reference voltage having a level lower than the first gamma reference voltage;
- a data driver which converts the first pretilt signal into a first voltage based on the first gamma reference voltage and outputs the first voltage during the first pretilt period, and which converts the second pretilt signal into a second voltage based on the second gamma reference voltage and outputs the second voltage during the second pretilt period;
- a gate driver which outputs a first gate signal during the first pretilt period and a second gate signal during the second pretilt period;
- and
- a display unit which displays images using a plurality of pixels, each pixel of which includes a main pixel which receives the first voltage in response to the first gate signal during the first pretilt period and a sub pixel which receives the second voltage in response to the second gate signal during the second pretilt period,
- wherein a first transmittance of the main pixel during the first pretilt period is identical to a second transmittance of the sub pixel during the second pretilt period.
4 more elements
Dependencies are inferred from the claim text.