Electro-optical apparatus, driving method thereof, and electronic device
An electrooptical apparatus having a plurality of scanning lines, a plurality of signal lines, and electrooptical devices each being placed at an intersection of each of the scanning lines and each of the signal lines, and the electrooptical apparatus is driven according to the amount of drive current supplied to the electrooptical devices. The electrooptical apparatus includes a lighting time measuring unit for measuring a lighting time of the electrooptical devices, a lighting time storage unit for storing the lighting time obtained by the lighting time measuring unit, and a drive current amount adjusting unit for adjusting the amount of drive current based on the lighting time stored in the lighting time storage unit so as to correct the brightness of the electrooptical devices.
1. An electro-optical apparatus comprising:
a plurality of scanning lines;
a plurality of signal lines;
a plurality of electro-optical devices placed at intersections of the plurality of scanning lines and the plurality of signal lines;
a driver to supply a drive voltage or a drive current to the electro-optical devices via the plurality of signal lines according to data signals;
a data signal measuring unit to measure an amount of data signals;
a data signal amount storage unit to accumulate and store the amount of the data signals; and
a drive voltage control unit including a power supply circuit that supplies a power supply voltage to the electro-optical devices, the power supply voltage being adjusted based on the amount of the accumulated data signals stored in the data signal amount storage unit.
2. The electro-optical apparatus according to claim 1 , the electro-optical devices including three types of electro-optical devices for R, G and B (red, green, and blue),
the data signal measuring unit measuring the amount of the data signals for each of the three types of electro-optical devices,
the data signal amount storage unit accumulating and storing the amount of data signals for each of the three types of electro-optical devices, and
the power supply voltage being adjusted for each of the three types of electro-optical devices.
3. The electro-optical apparatus according to claim 1 , the electro-optical devices including a first electro-optical device and a second electro-optical device,
the data signal measuring unit measuring the amount of the data signals for each of the first electro-optical device and the second electro-optical device,
the data signal amount storage unit accumulating and storing the amount of data signals for each of the first electro-optical device and the second electro-optical device, and
the power supply voltage being adjusted for each of the first and the second electro-optical devices.
4. The electro-optical apparatus according to claim 1 , the electro-optical devices including organic EL devices.
5. An electro-optical apparatus comprising:
a plurality of scanning lines;
a plurality of signal lines;
a plurality of electro-optical devices placed at intersections of the plurality of scanning lines and the plurality of signal lines;
a driver to supply a drive voltage or a drive current to the electro-optical devices via the plurality of signal lines according to data signals;
a lightning time measuring unit to measure an a lightning time of the plurality of electro optical devices;
a lightning time storage unit to accumulate and store the lightning time; and
a drive voltage control unit including a power supply circuit that supplies a power supply voltage applied to the electro-optical devices, the power supply voltage being based on the accumulated lightning time stored in the lightning time storage unit.
6. The electro-optical apparatus according to claim 5 , the lightning time measuring unit including a FCKL counter for counting a number of frame synchronizing signals.