Organic electroluminescence display panel and display apparatus using thereof
View Patent ↗The organic EL display panel according to the present invention includes; a plurality of data lines, a plurality of scan lines, switching elements of which second ends are connected to the scan lines to turn currents on and off and pixel electrodes provided in specific areas disposed in a matrix among the data lines and the scan lines, embedding specific impedance elements, and, emitting light by being supplied with level-reduced voltages by the impedance elements according to data signals inputted through the first ends of the switching elements.
1. An organic EL display panel comprising:
a plurality of pixels formed in substantially a matrix arrangement by a plurality of data lines transmitting data signals and a plurality of scan lines lying at substantially a right angle to the data lines and transmitting scan signals;
switching transistors formed in each pixel, the switching transistors having input terminals connected to the data lines and control terminals connected to the scan lines;
pixel electrodes provided in the plurality of pixels, each pixel electrode further comprising an embedded impedance element, and a storage capacitor having one end connected to a ground voltage,
wherein the switching transistors turn on and off current to the pixel electrodes and, the pixel electrodes emit light when supplied with voltages, which are lowered by the impedance elements, according to data signals inputted through the input terminals of the switching transistors, and
wherein each of the pixel electrodes comprises:
the storage capacitor having one end grounded and the other end connected to an output terminal of the switching transistor, the storage capacitor charging a driving voltage from the switching transistor;
a driving device responding to the data signal input through a control terminal thereof to output the charged driving voltage, which it receives through an input terminal thereof from the storage capacitor, through an output terminal thereof;
the impedance element having one end connected to the output terminal of the driving device, which reduces the voltage level of the driving voltage received from the driving device; and
an organic EL device connected to the impedance element, wherein the organic EL device is supplied on its opposite end with an organic EL driving voltage from an external device, and thereby emits light according to a difference between the organic EL driving voltage and the reduced driving voltage at the other end of the impedance element.
2. The organic EL display panel of claim 1 , wherein the impedance element is a resistor.
3. The organic EL display panel of claim 1 , wherein the impedance element is a MOS transistor.
4. The organic EL display panel of claim 1 , wherein one end of the organic EL device is connected in common to one end of an adjacent organic EL device to be supplied with the organic EL driving voltage through a common connection terminal.
5. The organic EL display panel of claim 1 wherein the data signals are constant voltages of on/off level.
6. An organic EL display comprising:
a timing controller supplied with image signals and a control signal and outputting first and second timing signals and a power control signal;
a column driver supplied with the image signals and the first timing signals to output data signals;
a row driver supplied with the second timing signal to output scan signals;
a power supply supplied with the power control signal to output a switched power; and
an organic EL display panel comprising a plurality of pixels formed in substantially a matrix arrangement by a plurality of data lines and a plurality of scan lines, switching elements having input terminals connected to the scan lines, pixel electrodes provided in the plurality of pixels, each pixel electrode further comprising an embedded impedance element, and a storage capacitor having one end connected to a ground voltage,
wherein the switching elements turn on and off current to the pixel electrodes and, the pixel electrodes emit light when supplied with voltages, which are lowered by the impedance elements, according to data signals inputted through the input terminals of the switching elements, and
wherein each of the pixel electrodes comprises:
the storage capacitor having one end grounded and the other end connected to an output terminal of the switching element, the storage capacitor charging a driving voltage from the switching element;
a driving device responding to the data signal input through a control terminal thereof to output the charged driving voltage, which it receives through an input terminal thereof from the storage capacitor, through an output terminal thereof;
the impedance element having one end connected to the output terminal of the driving device, which reduces the voltage level of the driving voltage received from the driving device; and
an organic EL device connected to the impedance element, wherein the organic EL device is supplied on its opposite end with an organic EL driving voltage from an external device, and thereby emits lights according to a difference between the organic EL driving voltage and the reduced driving voltage at the other end of the impedance elements.
7. The organic EL display of claim 6 , wherein the impedance element is a resistor.
8. The organic EL display of claim 6 , wherein the impedance element is a MOS transistor.
9. The organic EL display of claim 6 , wherein one end of the organic EL device is connected in common to one end of an adjacent organic EL device to be supplied with the organic EL driving voltage through a common connection terminal.
10. The organic EL display of claim 6 , wherein the data signals are constant voltages of on/off level.