Back to results
US 10,295,848 B2Granted
Display device having compensated common voltage
AssigneeSamsung Display Co., Ltd.
InventorsDongin Kim, Jinkyu Park, Yohan Lee, Kihoon Choi, Hyunseok Hong
Life of this patent
Estimating the term…
Abstract
A display device includes: a display panel; a driving frequency converter circuit configured to convert a driving frequency according to an input image data. A common voltage controller outputs a common voltage data corresponding to the driving frequency; and a common voltage generator receives the common voltage data to generate a common voltage and outputs the common voltage to the display panel. The common voltage has an inclined waveform within an integer multiple of a frame period.
Claims20
A display device comprising:
- a display panel;
- a driving frequency converter circuit configured to convert a driving frequency according to an input image data;
- a common voltage controller configured to control output of a common voltage data corresponding to the driving frequency;
- a common voltage generator configured to receive the common voltage data and generate a common voltage and output the common voltage to the display panel,
- wherein the generated common voltage has an inclined waveform within an integer multiple of a frame period, and a difference between a maximum value and a minimum value of the common voltage increases as the driving frequency decreases.
2 more elements
A display device comprising:
- a display panel including a plurality of gate lines, and a plurality of data lines insulated from and intersecting the plurality of gate lines, and a plurality of pixels electrically connected to the plurality of gate lines and the plurality of data lines;
- a timing controller circuit configured to receive a digital image data and identify whether the digital image data comprises a still image data or a moving image data;
- a data driver circuit configured to convert a digital image data signal into analog image data signals applied to the plurality of data lines;
- a gate driver circuit configured to generate gate signals in response output to the plurality of gate lines;
- a power management integrated circuit (PMIC) configured to:
- output a driving voltage and a gamma voltage to the data driver circuit, output gate driving voltages to the gate driver circuit, and output a common voltage to the display panel;
- wherein the common voltage has an inclined waveform within an integer multiple of a frame period, after the analog image data signals received by the plurality of pixels are refreshed for a first frame in the integer multiple of the frame period without being refreshed for other frame in the integer multiple of the frame period.
4 more elements
A display device comprising:
- a display panel including a plurality of gate lines, and a plurality of data lines insulated from and intersecting the plurality of gate lines, and a plurality of pixels electrically connected to the plurality of gate lines and the plurality of data lines;
- a timing controller circuit configured to receive a digital image data and identify whether the digital image data comprises a still image data or a moving image data;
- a data driver circuit configured to convert a digital image data signal into analog image data signals a plied to the plurality of data lines;
- a gate driver circuit configured to generate gate signals in response output to the plurality of gate lines;
- a power management integrated circuit (PMIC) configured to:
- output a driving voltage and a gamma voltage to the data driver circuit, output gate driving voltages to the gate driver circuit, and output a common voltage to the display panel;
- wherein the common voltage has an inclined waveform within an integer multiple of a frame period;
- and
- wherein the display panel is driven by a first frequency when the digital image data is a moving image data and driven by a second frequency when the digital image data is a still image data, and a difference between a maximum value and a minimum value of the common voltage increases as the second frequency decreases.
6 more elements
A non-transitory machine readable medium having stored thereon executable instructions to cause a display device to perform operations comprising:
- converting, by a driving frequency converter circuit, a driving frequency according to whether input image data is a still image;
- providing, by a common voltage controller, output data and gate control signals to data drivers and gate drivers including the driving frequency;
- providing a common voltage to a display panel in which the common voltage corresponds to the driving frequency, wherein the common voltage has an inclined waveform within an integer multiple of a frame period of an image displayed by the display panel, and wherein a difference between a maximum value and a minimum value of the common voltage increases as the driving frequency decreases.
Dependencies are inferred from the claim text.