US 2020/0090590 A1Published application

Display device and method of driving display device

AssigneeSamsung Display Co., Ltd.

InventorsJeon Kyoo KIM, Oh Jo KWON, Jiwoong KIM, JunYong SONG, Dong Won LEE, Jae Keun LIM

Life of this patent

Estimating the term…

Loading patent…

Abstract

A display device includes data lines, scan lines, and pixels. Each of the pixels includes an organic light emitting diode, a first transistor (OLED), and a second transistor. The first transistor is electrically connected to an anode of the OLED. The second transistor is electrically connected to the first transistor, a scan line among the scan lines, and a data line among the data lines. The second transistors of the pixels may receive instances of a reference voltage from the data lines during a first period of a frame. The second transistors of the pixels may simultaneously receive instances of a turn-on scan signal from the scan lines during the first period of the frame. Cathodes of the OLEDs of the pixels may receive instances of a turn-off voltage for the OLEDs to turn off during the first period of the frame.

Claims20

Dependent claims

A display device comprising:

a plurality of data lines;
a plurality of scan lines electrically insulated from the plurality of data lines;
and
a plurality of pixel circuits, each of the pixel circuits comprising an organic light emitting diode, a first transistor, and a second transistor,
wherein the first transistor is electrically connected to an anode electrode of the organic light emitting diode,
wherein the second transistor is electrically connected to the first transistor, a scan line among the scan lines, and a data line among the data lines,
wherein the second transistors of the pixel circuits are configured to respectively receive instances of a reference voltage from the plurality of data lines during a first period of a frame,
wherein the second transistors of the pixel circuits are configured to respectively and simultaneously receive instances of a turn-on scan signal from the plurality of scan lines and turn on during the first period of the frame, and
wherein cathode electrodes of the organic light emitting diodes of the pixel circuits are configured to respectively receive instances of a turn-off voltage for the organic light emitting diodes of the pixel circuits to turn off during the first period of the frame.

6 more elements

A method of driving a display device, the display device comprising a plurality of data lines, a plurality of scan lines, and a plurality of pixel circuits, each of the pixel circuits comprising an organic light emitting diode, a first transistor, and a second transistor, the method comprising:

providing instances of a reference voltage through the plurality of data lines to the second transistors of the pixel circuits during a first period of a frame;
simultaneously providing instances of a turn-on scan signal through the plurality of scan lines to the second transistors of the pixel circuits to turn on the second transistors of the pixel circuits during the first period of the frame;
and
applying instances of a turn-off voltage to cathode electrodes of the organic light emitting diodes of the pixel circuits to turn off the organic light emitting diodes of the pixel circuits during the first period of the frame.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 16/402,169Filed 2 May 2019
Priority: KR 10-2018-011196819 Sep 2018
Published: 19 Mar 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 3/3258
Using an active matrix: with pixel circuitry controlling the voltage across the light-emitting element
G09G 3/3266
Organic, e.g. using organic light-emitting diodes [OLED]: details of drivers for scan electrodes
G09G 3/3275
Organic, e.g. using organic light-emitting diodes [OLED]: details of drivers for data electrodes