Display apparatus and driving method for display apparatus
AssigneeCanon Kabushiki Kaisha
InventorFujio Kawano
Life of this patent
Estimating the term…
Abstract
There are provided for each column of pixels, a detecting unit which detects a voltage between a gate and a source of a drive transistor when a predetermined current is fed to the drive transistor and a unit which adds a data voltage to the voltage supplied by the detecting unit and supplies a sum to a data line.
Claims9
A display apparatus comprising:
- pixels arranged in a row direction and a column direction;
- a data line and a feedback line provided for each column of the pixels;
- and
- a column control circuit connected to the data line and feedback line, wherein
- a light emitting device and a drive circuit which drives the light emitting device are provided for each of the pixels,
- the drive circuit has a drive transistor which controls current to be fed to the light emitting device, and
- the column control circuit has
- a detecting circuit which detects a voltage between a gate and a source of the drive transistor when a predetermined current is fed to the drive transistor, and
- a unit which adds a data voltage to a voltage supplied by the detecting circuit and supplies a sum to the data line.
A display apparatus comprising:
- pixels arranged in a row direction and a column direction;
- a data line and a feedback line provided for each column of the pixels;
- and
- a column control circuit connected to the data line and feedback line, wherein
- a light emitting device and a drive circuit which drives the light emitting device are provided for each of the pixels,
- the drive circuit has
- a drive transistor which controls current to be fed to the light emitting device,
- a first switch provided between a gate of the drive transistor and the data line, and
- a second switch provided between a drain of the drive transistor and the feedback line, and
- the column control circuit turns on the first switch and the second switch, scans a voltage in a predetermined range and outputs it to the data line, detects a voltage when a predetermined current is fed to the drive transistor, turns off the second switch and supplies a sum voltage of the detected voltage and a data voltage to the data line.
A method for driving a display apparatus including pixels arranged in a row direction and a column direction, a data line and a feedback line provided for each column of the pixels, and a column control circuit connected to the data line and feedback line, wherein
- a light emitting device and a drive circuit which drives the light emitting device are provided for each of the pixels, and
- the drive circuit has
- a drive transistor which controls current to be fed to the light emitting device,
- a first switch provided between a gate of the drive transistor and the data line, and
- a second switch provided between a drain of the drive transistor and the feedback line,
- the method comprising:
- turning on the first switch and the second switch, scanning a voltage in a predetermined range and outputs it to the data line, and detecting a voltage when a predetermined current is fed to the drive transistor;
- and
- turning off the second switch and supplying a sum voltage of the detected voltage and a data voltage to the data line.
Dependencies are inferred from the claim text.