Display device for adjusting gamma voltage and method for operating the same
AssigneeMagnaChip Semiconductor, Ltd.
InventorsJusang Park, Hyoungkyu Kim
Life of this patent
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Abstract
The display device includes a display panel including a plurality of pixels; a driver IC configured to convert digital data corresponding to an input image to an analog voltage using a gamma voltage, and to supply the analog voltage to the plurality of pixels; and a power supply configured to supply a pixel driving voltage to the display panel and the driver IC. The driver IC includes a weight selector configured to select a weight for adjusting the gamma voltage based on a change amount of the pixel driving voltage supplied from the power supply; and a gamma reference voltage generating unit configured to generate a gamma reference voltage based on the selected weight.
Claims17
A display device, comprising:
- a display panel comprising a plurality of pixels;
- a driver IC configured to convert digital data corresponding to an input image to an analog voltage using a gamma voltage, and to supply the analog voltage to the plurality of pixels;
- and
- a power supply configured to supply a pixel driving voltage to the display panel and the driver IC,
- wherein the driver IC comprises:
- a weight selector configured to select a weight for adjusting the gamma voltage based on a change amount of the pixel driving voltage supplied from the power supply;
- and
- a gamma reference voltage generating unit configured to generate a gamma reference voltage based on the selected weight, and
- wherein the gamma reference voltage generating unit generates the gamma reference voltage using a reference voltage corresponding to the selected weight, the reference voltage being determined based on a table indicating at least one reference voltage corresponding to the selected weight.
A method for operating a display device, the method comprising:
- selecting a weight for adjusting a gamma voltage of a digital-to-analog converter (DAC) based on a change amount of a pixel driving voltage supplied from a power supply;
- generating a gamma reference voltage which is used to generate the gamma voltage based on the selected weight, wherein the gamma reference voltage is generated using a reference voltage corresponding to the selected weight, the reference voltage being determined based on a table indicating at least one reference voltage corresponding to the selected weight;
- and
- adjusting the gamma voltage using the generated gamma reference voltage.
Dependencies are inferred from the claim text.