Display driver IC for low voltage signal conversion and electronic device comprising the same
AssigneeSamsung Electronics Co., Ltd.
InventorsShigenobu Maeda, Dong-Il Park
Life of this patent
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Abstract
A display driver integrated circuit (IC) is provided. The display driver IC includes a shift register configured to output a digital signal, and a digital-analog converter configured to receive the digital signal and generate a data voltage corresponding to the digital signal, wherein the digital-analog converter includes a delta-sigma modulator configured to output a modulated signal by receiving the digital signal and a first voltage, and performing delta-sigma modulation on the digital signal using the first voltage, and a level shifter configured to receive the modulated signal and a second voltage higher than the first voltage, and amplify the modulated signal using the second voltage.
Claims20
A display driver integrated circuit (IC) comprising:
- a shift register configured to output a digital signal;
- and
- a digital-analog converter configured to receive the digital signal and generate a data voltage corresponding to the digital signal, wherein the digital-analog converter includes,
- a delta-sigma modulator configured to output a modulated signal by,
- receiving the digital signal and a first voltage, and
- performing delta-sigma modulation on the digital signal using the first voltage, and
- a level shifter configured to receive the modulated signal and a second voltage higher than the first voltage, and amplify the modulated signal using the second voltage,
- wherein the delta-sigma modulator is a lower-voltage element than the level shifter.
A display device comprising:
- a display panel including pixels;
- and
- a display driver integrated circuit (IC) including a delta-sigma modulator and a level shifter, the display driver IC configured to,
- generate a data voltage to cause the pixels to display a gray scale by,
- receiving digital image data,
- performing, via the delta-sigma modulator, delta-sigma modulation on the digital image data using a first voltage, and
- amplifying, via the level shifter, the modulated signal using a second voltage higher than the first voltage to generate the data voltage, and provide the data voltage to the display panel.
An electronic device comprising:
- a host configured to output digital image data;
- a display panel including pixels;
- and
- a display driver integrated circuit (IC) including a delta-sigma modulator and a level shifter, the display driver IC configured to generate a data voltage to cause the pixels to display a gray scale corresponding to the digital image data by,
- performing, via the delta-sigma modulator, delta-sigma modulation on the digital image data using a first voltage, and
- amplifying, via the level shifter, the modulated signal using a second voltage higher than the first voltage,
- wherein the delta-sigma modulator is a lower-voltage element than the level shifter.
Dependencies are inferred from the claim text.