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US 10,504,474 B2Granted
Data driver and display device with the same
AssigneesSamsung Display Co., Ltd., Sogang University Research Foundation
InventorsMoon Sang Hwang, Weon Jun Choe, Jun Sang Park, Tai Ji An, Seung Hoon Lee
Life of this patent
Estimating the term…
Abstract
A data driver includes a digital to analog converter configured to receive a reference gray voltage and image data, and configured to generate gray voltages corresponding to the image data, and an output buffer including a plurality of buffer circuits connected to an output terminal of the digital to analog converter, and configured to selectively receive one of the gray voltages.
Claims16
A data driver comprising:
- a digital to analog converter configured to receive a reference gray voltage and image data, and configured to generate gray voltages corresponding to the image data;
- and
- an output buffer comprising a plurality of buffer circuits connected to an output terminal of the digital to analog converter, and configured to selectively receive one of the gray voltages,
- wherein each of the buffer circuits comprises:
- a switch connected to the output terminal of the digital to analog converter, and configured to sequentially transmit a corresponding one of the gray voltages;
- a unit gain buffer;
- and
- a voltage stabilizer connected between an output terminal of the switch and a non-inverting input terminal of the unit gain buffer, and configured to stabilize an input voltage of the unit gain buffer.
5 more elements
A display device comprising:
- a display panel comprising a plurality of pixels at respective crossing regions of a plurality of data lines and a plurality of gate lines;
- a gate driver connected to the plurality of gate lines;
- a data driver connected to the plurality of data lines;
- and
- a signal controller configured to control operations of the gate driver and the data driver,
- wherein the data driver comprises:
- a digital to analog converter configured to receive a plurality of reference gray voltages and image data, and configured to generate gray voltages corresponding to the image data;
- and
- an output buffer comprising a plurality of buffer circuits connected to an output terminal of the digital to analog converter, and configured to selectively receive one of the gray voltages, and
- wherein each of the buffer circuits comprises:
- a switch connected to the output terminal of the digital to analog converter, and configured to sequentially transmit a corresponding one of the gray voltages;
- a unit gain buffer;
- and
- a voltage stabilizer connected between an output terminal of the switch and a non-inverting input terminal of the unit gain buffer, and configured to stabilize an input voltage of the unit gain buffer.
11 more elements
Dependencies are inferred from the claim text.