Display unit, display panel, and method of driving the same, and electronic apparatus
View Patent ↗A display unit ( 1 ) includes a light-emitting device ( 13 ) and a pixel circuit ( 12 ) in each pixel ( 11 ), and a drive section ( 20 ) configured to drive the pixel circuit ( 12 ). The pixel circuit ( 12 ) includes a drive transistor (Tr 1 ) configured to drive the light-emitting device ( 13 ), and a write transistor (Tr 2 ) configured to control application of a signal voltage corresponding to an image signal to a gate of the drive transistor (Tr 1 ). The drive section ( 20 ) performs Vth correction that allows a gate-source voltage of the drive transistor (Tr 1 ) to be brought close to a threshold voltage of the drive transistor (Tr 1 ) on all pixel rows, and then performs writing of the signal voltage corresponding to the image signal to gates of the drive transistors (Tr 1 ) in all pixel rows.
1. A display unit comprising:
a display section including a light-emitting device and a pixel circuit in each pixel; and
a drive section configured to drive the pixel circuit, based on an image signal,
wherein the pixel circuit includes
a drive transistor configured to drive the light-emitting device, and
a write transistor configured to control application of a signal voltage corresponding to the image signal to a gate of the drive transistor,
the drive section performs, on all pixel rows, correction that allows a gate-source voltage of the drive transistor to be brought close to a threshold voltage of the drive transistor, and then performs, on all pixel rows, writing of the signal voltage corresponding to the image signal to gates of the drive transistors,
the drive section performs scanning for the correction at shorter intervals than one horizontal period,
the drive section performs the correction and the writing to keep an nth period in which the light-emitting device emits light in an nth frame and an n+1th period in which the light-emitting device emits light in an n+1th frame from overlapping, and to have a black period in which black is displayed on an entirety of the display section, and
during the black period for a given frame, the drive section performs the correction for the given frame for at least a first pixel row, and performs the writing for the given frame for at least a second pixel row.
2. The display unit according to claim 1 , wherein the drive section performs the correction on each pixel row throughout a longer period than one horizontal period.
3. The display unit according to claim 1 , wherein
the display section includes a signal line connected to the gate of the drive transistor, and
the drive section continuously outputs a fixed voltage unrelated to the image signal to the signal line in a correction period in which the correction is performed, and continuously outputs the signal voltage to the signal line in a writing period in which the writing is performed.
4. An electronic apparatus provided with a display unit, the display unit comprising:
a display section including a light-emitting device and a pixel circuit in each pixel; and
a drive section configured to drive the pixel circuit, based on an image signal,
wherein the pixel circuit includes
a drive transistor configured to drive the light-emitting device, and
a write transistor configured to control application of a signal voltage corresponding to the image signal to a gate of the drive transistor,
the drive section performs, on all pixel rows, correction that allows a gate-source voltage of the drive transistor to be brought close to a threshold voltage of the drive transistor, and then performs, on all pixel rows, writing of the signal voltage corresponding to the image signal to gates of the drive transistors,
the drive section performs scanning for the correction at shorter intervals than one horizontal period,
the drive section performs the correction and the writing to keep an nth period in which the light-emitting device emits light in an nth frame and an n+1th period in which the light-emitting device emits light in an n+1th frame from overlapping, and to have a black period in which black is displayed on an entirety of the display section, and
during the black period for a given frame, the drive section performs the correction for the given frame for at least a first pixel row, and performs the writing for the given frame for at least a second pixel row.
5. A method of driving a display unit, the method comprising:
in the display unit including a light-emitting device and a pixel circuit in each pixel, the pixel circuit including a drive transistor configured to drive the light-emitting device and a write transistor configured to control application of a signal voltage corresponding to an image signal to a gate of the drive transistor, performing, on all pixel rows, correction that allows a gate-source voltage of the drive transistor to be brought close to a threshold voltage of the drive transistor, and then performing writing of the signal voltage corresponding to the image signal to gates of the drive transistors in all pixel rows,
performing scanning for the correction at shorter intervals than one horizontal period,
performing the correction and the writing to keep an nth period in which the light-emitting device emits light in an nth frame and an n+1th period in which the light-emitting device emits light in an n+1th frame from overlapping, and to have a black period in which black is displayed on an entirety of the display section, and
during the black period for a given frame, performing the correction for the given frame for at least a first pixel row, and performing the writing for the given frame for at least a second pixel row.