Organic electroluminescence device and method of driving the same
Embodiments of the present invention relate to an organic electroluminescent device using different driving voltages according to sub-pixels. The organic electroluminescent device may include a panel, a driving voltage circuit and a driver. The panel may have a plurality of sub-pixels. The driving voltage circuit may generate a plurality of driving voltages. The driver may drive the sub-pixels by using the generated driving voltages. The organic electroluminescent device may use driving voltages corresponding to sub-pixels, and power consumption may be reduced.
1. A circuit for driving an electroluminescent device comprising:
a power source supplier receiving a DC voltage from a DC source and providing the plurality of different driving voltages, wherein the power source supplier including:
a boosting circuit boosting the DC voltage up to a red driving voltage suitable for driving red sub-pixels and providing the red driving voltage to a red driving voltage source;
a first voltage adjusting circuit adjusting the red driving voltage to a green driving voltage suitable for driving green sub-pixels and providing the green driving voltage to a green driving voltage source; and
a second voltage adjusting circuit adjusting the red driving voltage to a blue driving voltage suitable for driving blue sub-pixels and providing the blue driving voltage to a blue driving voltage source; and
a driver that drives the red, green and blue sub-pixels by using the provided red, green and blue driving voltages.
2. The circuit of claim 1 , wherein the driver includes:
a red driving circuitry to drive red sub-pixels by receiving the red driving voltage from the red driving voltage source;
a green driving circuitry to drive green sub-pixels by receiving the green driving voltage from the green driving voltage source; and
a blue driving circuitry to drive blue sub-pixels by receiving the blue driving voltage from the blue driving voltage source.
3. The circuit of claim 1 , wherein the power source supplier further comprising a boosted voltage detecting circuit to detect the boosted DC voltage from the boosting circuit and to provide information concerning the detected boosted DC voltage back to the boosting circuit in order to control a boosting rate of the boosting circuit.
4. The circuit of claim 1 , wherein the electroluminescent device comprises an organic electroluminescent device.
5. The circuit of claim 1 , wherein the red, green and blue driving voltage sources and the driver are provided on an integrated chip.
6. An electroluminescent device comprising:
a plurality of scan lines in a first direction;
a plurality of data lines in a second direction, the first and second direction being different;
a plurality of pixels, each pixel including a red sub-pixel, a green sub-pixel and a blue sub-pixel, and each sub-pixel including a corresponding data line and a corresponding scan line; and
a driving circuit coupled to at least one of the scan lines or the data lines, wherein the driving circuit comprising:
a power source supplier receiving a DC voltage from a DC source and providing the plurality of different driving voltages, wherein the power source supplier including:
a boosting circuit boosting the DC voltage up to a red driving voltage suitable for driving the red sub-pixel and providing the red driving voltage to a red driving voltage source;
a first voltage adjusting circuit adjusting the red driving voltage to a green driving voltage suitable for driving the green sub-pixel and providing the green driving voltage to a green driving voltage source; and
a second voltage adjusting circuit adjusting the red driving voltage to a blue driving voltage suitable for driving the blue sub-pixel and providing the blue driving voltage to a blue driving voltage source; and
a driver that drives the red, green and blue sub-pixels by using the provided red, green and blue driving voltages.
7. The electroluminescent device of claim 6 , wherein the power source supplier further comprising a boosted voltage detecting circuit to detect the boosted DC voltage from the boosting circuit and to provide information concerning the detected boosted DC voltage back to the boosting circuit in order to control a boosting rate of the boosting circuit.
8. The electroluminescent device of claim 7 , wherein the driver comprises a plurality of data drivers for driving the data lines with a plurality of different driving voltages.
9. The electroluminescent device of claim 7 , wherein the driving circuit is provided on an integrated chip, and the integrated chip includes the first and second voltage adjusting circuits.
10. The electroluminescent device of claim 9 wherein the driver includes:
a red driving circuitry to drive red sub-pixels by receiving the red driving voltage from the red driving voltage source;
a green driving circuitry to drive green sub-pixels by receiving the green driving voltage from the green driving voltage source; and
a blue driving circuitry to drive blue sub-pixels by receiving the blue driving voltage from the blue driving voltage source.
11. The electroluminescent device of claim 6 , wherein the electroluminescent device comprises an organic electroluminescent device.
12. A method of driving an electroluminescent device having a plurality of pixels, each pixel including a red sub-pixel, a green sub-pixel and a blue sub-pixel, comprising:
receiving a DC voltage from a DC source;
boosting the DC voltage up to a red driving voltage suitable for driving the red-pixel and providing the red driving voltage;
adjusting the red driving voltage to a green driving voltage suitable for driving green sub-pixels and providing the green driving voltage;
adjusting the red driving voltage to a blue driving voltage suitable for driving blue sub-pixels and providing the blue driving voltage to a blue driving voltage source; and
driving the red, green and blue sub-pixels by using the provided red, green and blue driving voltages.
13. The method of claim 12 , further comprising:
detecting the boosted DC voltage to control a boosting rate of the boosted DC voltage in order to have a desired voltage.