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US 2006/0077137 A1Published application
Data driving apparatus in a current driving type display device
AssigneeSamsung Mobile Display Co., Ltd.
InventorOh-Kyong Kwon
Life of this patent
Estimating the term…
Abstract
A current output device of a data driving apparatus sequentially applying data signals to data lines. The data signals correspond to analog converted output currents and the current output device includes a switch controlling supply of the analog output currents according to a first control signal, a master current sample/hold circuit sampling or holding the analog output currents according to a second control signal, a slave current sample/hold circuit holding or sampling the analog output currents according to a third control signal, and a multiplexer selecting an output current held in the master current sample/hold circuit or the slave current sample/hold circuit according to the fourth control signal and applying the selected output current to a corresponding data line.
Claims40
A current output device of a data driving apparatus for sequentially applying data signals to data lines, the data signals corresponding to analog output currents, the current output device comprising:
- a switch for controlling supply of the analog output currents according to a first control signal;
- a master current sample/hold circuit for sampling or holding the analog output currents according to a second control signal;
- a slave current sample/hold circuit for holding or sampling the analog output currents according to a third control signal;
- and
- a multiplexer for selecting at least one of the analog output currents held in the master current sample/hold circuit or the slave current sample/hold circuit according to a fourth control signal and for applying the selected analog output current to a corresponding one of the data lines.
2 more elements
A data driving apparatus for applying data signals to a plurality of data lines of a display panel, the data driving apparatus comprising:
- a multiplexer for sequentially selecting and outputting a plurality of data signals;
- a digital/analog converter (DAC) for sequentially converting a plurality of data signals sequentially transmitted from the multiplexer into analog output currents, the analog output currents being analog data signals;
- and
- a current output unit for applying the data signals converted by the DAC to the data lines,
- wherein the current output unit comprises:
- a switch for controlling supply of the analog output currents according to a first control signal;
- a master current sample/hold circuit for sampling or holding the analog output currents according to a second control signal;
- a slave current sample/hold circuit for holding or sampling the analog output currents according to a third control signal;
- and
- a multiplexer for selecting at least one of the analog output currents held in the master current sample/hold circuit or the slave current sample/hold circuit according to a fourth control signal and for applying the selected analog output current to a corresponding one of the data lines.
7 more elements
A light emitting display device comprising:
- a display unit having a plurality of scan lines for transmitting selection signals, a plurality of data lines for transmitting data signals, and a plurality of pixels coupled to the plurality of data lines and the plurality of scan lines;
- a data driver for generating the data signals and for applying the data signals to the data lines;
- and
- a scan driver for generating the selection signals and for applying the generated selection signals to the respective scan lines,
- wherein the data driver comprises:
- a multiplexer for sequentially selecting a plurality of data signals and outputting the sequentially selected data signals;
- a digital/analog converter (DAC) for sequentially converting a plurality of data signals sequentially transmitted from the multiplexer into analog data signals;
- and
- a current output unit for controlling the data signals converted by the DAC to be applied to the data lines,
- wherein the current output unit comprises:
- a switch for controlling supply of the analog output currents according to a first control signal;
- a master current sample/hold circuit for sampling or holding the analog output currents according to a second control signal;
- a slave current sample/hold circuit for holding or sampling the analog output currents according to a third control signal;
- and
- a multiplexer for selecting at least one of the analog output currents held in the master current sample/hold circuit or the slave current sample/hold circuit according to a fourth control signal and for applying the selected analog output current to a corresponding one of the data lines.
12 more elements
A light emitting display panel comprising:
- a plurality of scan lines for transmitting selection signals;
- a plurality of data lines for transmitting analog data signals;
- a plurality of pixels coupled to the scan lines and the data lines;
- a scan driver for generating the selection signals and for applying the generated selection signals to the scan lines;
- and
- a data driver for sequentially converting a sequentially transmitted plurality of data signals into analog data signals, and for controlling a current output unit to sequentially apply the analog data signals to the data lines, the analog data signals corresponding to analog output currents,
- wherein the current output unit of the data driver comprises:
- a switch for controlling supply of the analog output currents according to a first control signal;
- a master current sample/hold circuit for sampling or holding the analog output currents according to a second control signal;
- a slave current sample/hold circuit for sampling or holding the analog output currents according to a third control signal;
- and
- a multiplexer for selecting an output current held in the master current sample/hold circuit or the slave current sample/hold circuit according to the fourth control signal and for applying the selected output current to the a corresponding one of the data lines.
9 more elements
A current output device of a data driver for sequentially applying data signals to data lines, the data signals corresponding to analog output currents, the current output device comprising:
- a switch for controlling supply of the analog output currents according to a first control signal;
- a current sample/hold circuit for sampling or holding the analog output currents according to a current sample/hold control signal;
- a current supplier for adding a direct current to the analog output currents and for supplying a sum of the direct current and the analog output currents to the current sample/hold circuit;
- and
- an adder for receiving a direct current component corresponding to the direct current and for subtracting an amount of current that corresponds to the amount of the direct current provided by the current supplier from a signal output by the current sample/hold circuit.
2 more elements
A data driving apparatus for applying data signals to a plurality of data lines of a display panel, the data driving apparatus comprising:
- a multiplexer for sequentially selecting the data signals and for outputting the sequentially selected data signals;
- a digital/analog converter (DAC) for sequentially converting the data signals sequentially transmitted by the multiplexer into analog output currents which are analog data signals;
- and
- a current output unit for controlling the data signals converted by the DAC to be applied to the data lines,
- wherein the current output unit comprises:
- a switch for controlling supply of the analog output currents according to a first control signal;
- a current sample/hold circuit for sampling or holding the analog output currents according to a current/hold control signal;
- a current supplier for adding a direct current to the analog output currents and for supplying a sum of the direct current and the analog output currents to the current sample/hold circuit;
- and
- an adder for receiving a direct current component corresponding to the direct current and for subtracting an amount of current that corresponds to the amount of the direct current provided by the current supplier from a signal output by the current sample/hold circuit.
7 more elements
A light emitting display device comprising:
- a display unit having a plurality of scan lines for transmitting selection signals, a plurality of data lines for transmitting data signals, and a plurality of pixels coupled to the plurality of data lines and the plurality of scan lines;
- a data driver for generating the data signals and for applying the data signals to the data lines;
- and
- a scan driver for generating the selection signals and for applying the generated selection signals to the scan lines,
- wherein the data driver comprises:
- a multiplexer for sequentially selecting a plurality of data signals and for outputting the sequentially selected data signals;
- a digital/analog converter (DAC) for sequentially converting a plurality of data signals sequentially transmitted from the multiplexer into analog data signals that are analog output currents;
- and
- a current output unit for controlling the data signals converted by the DAC to be applied to the data lines, and
- wherein the current output unit comprises:
- a switch for controlling supply of the analog output currents according to a first control signal;
- a current sample/hold circuit for sampling or holding the analog output currents according to a second control signal;
- a current supplier for adding a direct current to the analog output currents and for supplying a sum of the direct current and the analog output currents to the current sample/hold circuit;
- and
- an adder for receiving a direct current component corresponding to the direct current and for subtracting an amount of current that corresponds to the amount of direct current provided by the current supplier from a signal output by the current sample/hold circuit.
12 more elements
A light emitting display panel comprising:
- a plurality of scan lines for transmitting selection signals;
- a plurality of data lines for transmitting data currents;
- a plurality of pixels coupled to the scan lines and the data lines;
- a scan driver for generating the selection signals and for applying the generated selection signals to the corresponding scan lines;
- and
- a data driver for sequentially converting a sequentially transmitted plurality of data signals into analog data signals that are analog output currents and for controlling a current output unit to sequentially apply the converted data signals to the data lines,
- wherein the current output unit of the data driver comprises:
- a switch for controlling supply of the analog output currents according to a first control signal;
- a current sample/hold circuit for sampling or holding the analog output currents according to a current/hold control signal;
- a current supplier for adding a direct current to the analog output currents and for supplying a sum of the direct current and the analog output currents to the current sample/hold circuit;
- and
- an adder for receiving a direct current component corresponding to the direct current and for subtracting an amount of current that corresponds to the amount of the direct current provided by the current supplier from a signal output by the current sample/hold circuit.
9 more elements
Dependencies are inferred from the claim text.