Light emitting pixel and apparatus for driving the same
AssigneeSamsung Electronics Co., Ltd.
InventorsYun Seung Shin, Jong Hak Baek
Life of this patent
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Abstract
A light emitting pixel includes a first organic light emitting diode (OLED) and a capacitor supplying to the first OLED current generated by an electric charge corresponding to a difference between a first voltage supplied to a first electrode of the capacitor and a second voltage supplied to a second electrode of the capacitor. The light emitting pixel further include a second OLED to supply the first voltage to the first electrode. The light emitting pixel further includes a voltage supply device to supply the first voltage to the first electrode in response to the second voltage.
Claims15
A light emitting pixel comprising:
- a capacitor including a first electrode and a second electrode;
- a organic light emitting diode (OLED) including an anode connected to the first electrode and a cathode connected to a power supply;
- and
- a switching circuit configured to supply a second voltage to the second electrode by being switched based upon a scan signal input through a scan line and a data signal input through a data line,
- wherein the capacitor supplies to the OLED a current generated by an electric charge corresponding to a difference between a first voltage supplied to the first electrode of the capacitor and the second voltage supplied to the second electrode of the capacitor.
A driver to drive a light emitting pixel, the driver comprising:
- a capacitor including a first electrode and a second electrode;
- a organic light emitting diode (OLED) including an anode connected to the first electrode and a cathode connected to a power supply;
- a switching circuit configured to supply a second voltage to the second electrode by being switched based upon a scan signal input through a scan line and a data signal input through a data line;
- a control signal generator configured to generate a control signal;
- and
- a voltage generator configured to generate a first voltage or the second voltage that toggles a predetermined number of times during a light emitting period in response to the control signal;
- wherein the capacitor supplies to the OLED a current generated by an electric charge corresponding to a difference between the first voltage supplied to the first electrode of the capacitor and the second voltage supplied to the second electrode of the capacitor.
A display apparatus comprising:
- a panel including a plurality of data lines, a plurality of scan lines, and a plurality of light emitting pixels;
- a driver including a voltage generator configured to generate a second voltage and to supply data signals through the data lines and scan signals through the scan lines,
- wherein each of the light emitting pixels comprises:
- a capacitor including a first electrode and a second electrode;
- a organic light emitting diode (OLED) including an anode connected to the first electrode and a cathode connected to a power supply;
- and
- a switching circuit configured to supply the second voltage to the second electrode by being switched based upon a scan signal input through a corresponding scan line and a data signal input through a corresponding data line,
- wherein the capacitor supplies to the OLED a current generated by an electric charge corresponding to a difference between a first voltage supplied to the first electrode of the capacitor and the second voltage supplied to the second electrode of the capacitor.
Dependencies are inferred from the claim text.