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US 2010/0245331 A1Published application
Display device and method for controlling the same
AssigneePanasonic Corporation
InventorsHiroshi SHIROUZU, Tetsurou NAKAMURA
Life of this patent
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Abstract
A display device is provided which includes a luminescence element, a data line, and a switch connected between an electrode of the luminescence element and the data line. A voltage generation circuit supplies a pre-charge voltage to the data line. A current generation circuit supplies an inspection current to the electrode of the luminescence element plural times through the data line and the switch. A voltage detection circuit detects, the plural times, voltage values of the electrode supplied with the inspection current. When a difference between the voltage values is at least a predetermined value, the voltage generation circuit supplies the data line with an updated voltage that is higher than the pre-charge voltage.
Claims14
A display device, comprising:
- a luminescence element including a first electrode and a second electrode;
- a first power line electrically connected to the first electrode;
- a second power line electrically connected to the second electrode;
- a capacitor for holding a capacitor voltage, the capacitor including a third electrode and a fourth electrode;
- a driver provided between the first electrode and the first power line for passing a signal current between the first power line and the second power line, the signal current corresponding to the capacitor voltage held by the capacitor;
- a data line electrically connected to one of the third electrode and the fourth electrode for supplying a signal voltage to one of the third electrode and the fourth electrode;
- a first switch provided between the data line and the one of the third electrode and the fourth electrode for causing the capacitor to hold the capacitor voltage, the capacitor voltage corresponding to the signal voltage;
- a voltage generation circuit electrically connected to the data line for supplying the signal voltage to the data line and supplying a pre-charge voltage to the data line;
- a current generation circuit electrically connected to the data line for supplying an inspection current to the luminescence element;
- a voltage detection circuit electrically connected to the data line for detecting a luminescence voltage of the luminescence element;
- a second switch electrically connected to the first electrode and the data line;
- and
- a controller configured to:
- turn off the first switch to turn off the driver;
- turn on the second switch;
- control the voltage generation circuit to supply the pre-charge voltage to the data line;
- control the current generation circuit to supply the inspection current to the first electrode of the luminescence element plural times through the data line and the second switch;
- control the voltage detection circuit to detect, the plural times through the data line and the second switch, voltage values of the first electrode supplied with the inspection current;
- and
- control the voltage generation circuit to supply the data line with an updated voltage that is higher than the pre-charge voltage when a difference in the voltage values of the first electrode detected the plural times is at least a predetermined value.
17 more elements
A method for controlling a display device, the display device including:
- a luminescence element including a first electrode and a second electrode;
- a first power line electrically connected to the first electrode;
- a second power line electrically connected to the second electrode;
- a capacitor for holding a capacitor voltage, the capacitor including a third electrode and a fourth electrode;
- a driver provided between the first electrode and the first power line for passing a signal current between the first power line and the second power line, the signal current corresponding to the capacitor voltage held by the capacitor;
- a data line electrically connected to one of the third electrode and the fourth electrode for supplying a signal voltage to one of the third electrode and the fourth electrode;
- a first switch provided between the data line and the one of the third electrode and the fourth electrode for causing the capacitor to hold the capacitor voltage, the capacitor voltage corresponding to the signal voltage;
- a voltage generation circuit electrically connected to the data line for supplying the signal voltage to the data line and supplying a pre-charge voltage to the data line;
- a current generation circuit electrically connected to the data line for supplying an inspection current to the luminescence element;
- a voltage detection circuit electrically connected to the data line for detecting a luminescence voltage of the luminescence element;
- and
- a second switch electrically connected to the first electrode and the data line,
- the method comprising:
- turning off the first switch to turn off the driver;
- turning on the second switch;
- controlling the voltage generation circuit to supply the pre-charge voltage to the data line;
- controlling the current generation circuit to supply the inspection current to the first electrode of the luminescence element plural times through the data line and the second switch;
- controlling the voltage detection circuit to detect, the plural times through the data line and the second switch, voltage values of the first electrode supplied with the inspection current;
- and
- controlling the voltage generation circuit to supply the data line with an updated voltage that is higher than the pre-charge voltage when a difference in the voltage values of the first electrode detected the plural times is at least a predetermined value.
17 more elements
A display device, comprising:
- a luminescence element including a first electrode and a second electrode;
- a first power line electrically connected to the first electrode;
- a second power line electrically connected to the second electrode;
- a capacitor for holding a capacitor voltage, the capacitor including a third electrode and a fourth electrode;
- a driver provided between the first electrode and the first power line for passing a signal current between the first power line and the second power line, the signal current corresponding to the capacitor voltage held by the capacitor;
- a data line electrically connected to one of the third electrode and the fourth electrode for supplying a signal voltage to one of the third electrode and the fourth electrode;
- a first switch provided between the data line and the one of the third electrode and the fourth electrode for causing the capacitor to hold the capacitor voltage, the capacitor voltage corresponding to the signal voltage;
- a current generation circuit electrically connected to the data line for supplying an inspection current to the luminescence element;
- a read line which reads a voltage of the first electrode;
- a voltage generation circuit electrically connected to the data line for supplying the signal voltage to the data line and electrically connected to the read line for supplying a pre-charge voltage to the read line;
- a voltage detection circuit electrically connected to the read line for detecting a luminescence voltage of the luminescence element
- a second switch electrically connected to the first electrode and the data line;
- a third switch electrically connected to the first electrode and the read line;
- a fourth switch electrically connected to the voltage generation circuit and one of the data line and the read line;
- and
- a controller configured to:
- turn off the first switch to turn off the driver;
- control the fourth switch to connect the voltage generation circuit and the read line;
- turn on the second switch and the third switch;
- control the voltage generation circuit to supply the pre-charge voltage to the read line;
- control the current generation circuit to supply the inspection current to the first electrode of the luminescence element through the data line and the second switch;
- and
- control the voltage detection circuit to detect, through the data line and the second switch, a voltage value of the first electrode supplied with the inspection current.
20 more elements
Dependencies are inferred from the claim text.