US 12,033,577 B2
Display device and method for driving same
Tamotsu Sakai, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 18/025,209
Filed by Sharp Kabushiki Kaisha, Sakai (JP)
PCT Filed Sep. 14, 2020, PCT No. PCT/JP2020/034635
§ 371(c)(1), (2) Date Mar. 8, 2023,
PCT Pub. No. WO2022/054266, PCT Pub. Date Mar. 17, 2022.
Prior Publication US 2023/0317002 A1, Oct. 5, 2023
Int. Cl. G09G 3/3233 (2016.01); G09G 3/32 (2016.01); G09G 3/3225 (2016.01); G09G 3/36 (2006.01)
CPC G09G 3/3233 (2013.01) [G09G 3/32 (2013.01); G09G 3/3225 (2013.01); G09G 3/3659 (2013.01); G09G 2300/0426 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/0283 (2013.01); G09G 2310/061 (2013.01); G09G 2310/08 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A display device comprising:
a display portion including a plurality of scanning lines, a plurality of control lines, a plurality of data lines, and a plurality of pixel circuits;
a scanning line driver circuit configured to drive the scanning lines and the control lines; and
a data line driver circuit configured to drive the data lines, wherein,
each of the pixel circuits includes:
a light-emitting element;
a drive transistor provided in series with the light-emitting element to control an amount of current flowing through the light-emitting element;
a write control transistor provided between one of the data lines and a first conductive terminal of the drive transistor and having a control terminal connected to one of the scanning lines;
a threshold compensation transistor provided between the drive transistor's control terminal and second conductive terminal and having a control terminal connected to the one of the scanning lines; and
an initialization transistor having a first conductive terminal connected to the control terminal of the drive transistor, a second conductive terminal to which an initialization voltage is applied, and a control terminal connected to one of the control lines,
the scanning line driver circuit selectively performs an operation of selecting the scanning lines in a predetermined order and an operation of selecting the scanning lines in a reverse order and, for each scanning line, selects the control line that corresponds to the each scanning line one horizontal period before the selection of the each scanning line,
the each of the pixel circuits further includes a second initialization transistor having a first conductive terminal connected to an anode terminal of the light-emitting element, a second conductive terminal to which the initialization voltage is applied, and a control terminal connected to the one of the scanning lines,
the one of the scanning lines branches into first and second wiring lines in the display portion,
the first wiring line is connected to the control terminal of the write control transistor and the control terminal of the threshold compensation transistor, and
the second wiring line is connected to the control terminal of the second initialization transistor.