Driving apparatus of electroluminescent display device and driving method thereof
AssigneeLG Electronics Inc.
InventorSeong Hak Moon
Life of this patent
Estimating the term…
Abstract
A driving apparatus of an electroluminescent display device includes: a scan driving unit for receiving a voltage from a single voltage source and sequentially supplying a scan pulse of which polarity is reversed by the frame unit to scan lines; and a data driving unit for receiving the voltage and sequentially supplying a data pulse with an opposite polarity to the polarity of the scan pulse to data lines. An optimum voltage to a pixel cell can be supplied by completely removing electric charges charged in the pixel cell by reversing a positive pulse or a negative pulse generated by a single power source by the frame unit and supplying it to each data line and scan line.
Claims36
A driving apparatus of an electroluminescent display device comprising:
- a plurality of pixel cells formed between a plurality of scan lines and data lines;
- a scan driving unit for receiving a voltage from a single scan voltage source and sequentially supplying to the plurality of scan lines a first scan pulse having a first polarity in a first frame or field and for sequentially supplying to the scan lines a second scan pulse having a second polarity opposite to the first polarity in a second frame or field such that a last scan pulse of the first scan pulse in the first frame or field substantially coincides with a beginning pulse of the second scan pulse in the second frame or field;
- and
- a data driving unit for receiving a voltage from a single data voltage source and supplying a data pulse to the data lines, wherein the data driving unit supplying the data pulse having the second polarity at a same time the scan driving unit supplying the first scan pulse having the first polarity, and the data driving unit supplying another data pulse having the first polarity at a same time the scan driving unit supplying the second scan pulse having the second polarity.
A driving apparatus of an electroluminescent display device comprising:
- a plurality of pixel cells formed between a plurality of scan lines and data lines;
- a scan driving unit for supplying to the scan lines a first scan pulse having a first polarity in a first frame or field and for supplying to the scan lines a second scan pulse having a second polarity opposite to the first polarity in a second frame or field, wherein the first and second scan pulses are sequentially supplied to the scan lines such that a last pulse in the first scan pulse substantially coincides with a beginning pulse in the second scan pulse;
- and
- a data driving unit for supplying a data pulse to the data lines, wherein the data driving unit supplies the data pulse to the data lines such that a polarity of the data pulse is opposite to a polarity of the first or second scan pulse in a respective frame or field.
A driving apparatus of an electroluminescent display device comprising:
- a plurality of pixel cells formed between a plurality of scan lines and data lines;
- a scan driving unit for receiving a voltage from a single scan voltage source and sequentially supplying to the plurality of scan lines a first scan pulse having a first polarity in a first frame or field and for sequentially supplying to the scan lines a second scan pulse having a second polarity opposite to the first polarity in a second frame or field such that a last scan pulse of the first scan pulse in the first frame or field substantially coincides with a beginning pulse of the second scan pulse in the second frame or field;
- and
- a data driving unit for receiving a voltage from a single data voltage source and supplying a data pulse to the data lines, wherein the data driving unit supplies the data pulse to the data lines such that a polarity of the data pulse is opposite to a polarity of the first or second scan pulse in a respective frame or field.
Dependencies are inferred from the claim text.