Samsung Display Co., Ltd.

Samsung Mobile Display Co., Ltd.

Samsung Sdi Co., Inc.

Sam-Il Han

Ji-Hyun Ka

Hyun-Chol Bang

Jin-Tae Jeong

Won-Kyu Kwak

Kwang-Min Kim

Sang-Ho Jeon

Sang-jo Lee

Ki-Myeong Eom

Ok-Kyung Park

Su-Bong Hong

Sang-hyuck Ahn

Mi-Hae Kim

Chang-Soo Pyon

Jin-Hui Cho

Seon-I Jeong

A scan driving apparatus, includes a first scan driving unit coupled to a second scan driving unit, the first scan driving unit receives a first start signal, a first clock signal, a second clock signal, and sequentially outputs the first clock signal as a first scan, and outputs the first boost clock signal as a first boost signal, and the second scan driving receives the first clock signal, the second clock signal, a second boost clock signal, and the first scan signal as a second start signal, to sequentially output the second clock signal as a second scan signal, and sequentially outputs the second boost clock signal as a second boost signal.

Apparatus for scan driving including scan driving units

A pixel circuit for an organic light emitting diode display is disclosed. The pixel is configured to provide fast response time and good isolation from data transition coupling.

Pixel and organic light emitting display using the same

An organic light emitting display and a method of manufacturing the organic light emitting display are provided. The organic light emitting display includes a display unit including pixels coupled to scan lines, data lines, emission control lines, and power lines, a scan driver on a side of the display unit and coupled to the scan lines, an emission control driver on another side of the display unit and coupled to the emission control lines, a first power pad on a side of one of the scan driver or the emission control driver for receiving power, a second power pad on another side of the one of the scan driver or the emission control driver, the second power pad coupled to the power lines, and power buses coupling the first power pad and the second power pad to each other.

Organic light emitting display and method of manufacturing the same

A pixel includes an organic light emitting diode (OLED), a driving transistor for controlling a current supplied to the OLED, a first transistor for transmitting a data signal to the driving transistor, and a capacitor coupled between the driving transistor and the first transistor. A driving method of the pixel includes initializing a gate voltage of the driving transistor, compensating a threshold voltage of the driving transistor, and transmitting a data signal to the driving transistor through the capacitor. A period for compensating the threshold voltage is longer than a period for transmitting the data signal to the driving transistor. Sufficient time to compensate the threshold voltage of the driving transistor of the pixel may be obtained under high resolution and high frequency driving to realize a display device of high image quality.

Pixel, display device using the same, and driving method thereof

A pixel is capable of securing enough threshold voltage compensating time in high resolution and high frequency driving and of compensating for the IR drop of a first power source ELVDD, and an organic light emitting display includes the pixel.

An organic light emitting diode (OLED) display includes: a switching thin film transistor including a switching gate electrode, a switching active layer, a switching source electrode, and a switching drain electrode; a driving thin film transistor including a driving gate electrode, a driving active layer, a driving source electrode, and a driving drain electrode; a capacitor including a first capacitor electrode and a second capacitor electrode; a scan line that is connected to the switching gate electrode of the switching thin film transistor; a data line that intersects the scan line and that is connected to the switching source electrode of the switching thin film transistor; a first power source line that is parallel to the data line and that is connected to the driving source electrode of the driving thin film transistor; a second power source line that is separated parallel to the data line and that is connected to the second capacitor electrode of the capacitor; and an organic light emitting diode that is connected to the driving drain electrode of the driving thin film transistor.

Organic light emitting diode display

A pixel, a display device including the pixel, and a driving method are disclosed. Each of a plurality of pixels included in the display device includes: an organic light emitting diode (OLED); a driving transistor for transmitting a driving current to the OLED according to a data signal; a first transistor for transmitting the data signal to the driving transistor according to a scan signal; and a first capacitor including a first terminal coupled to the first transistor and a second terminal coupled to a gate electrode of the driving transistor. In addition, the driving transistor is for diode-connecting in response to a threshold voltage compensation signal during a threshold voltage compensation period to compensate for a threshold voltage of the driving transistor. The threshold voltage compensation signal includes at least two pulses.

Pixel, display device, and driving method thereof

A pixel includes an OLED between a first power supply and a second power supply; a first transistor between the first power supply and the OLED, in which a gate electrode is connected to a first node; a second transistor between a first electrode of the first transistor and a data line, in which a gate electrode is connected to a current scanning line; a third transistor between a second electrode of the first transistor and the first node, in which a gate electrode is connected to the current scanning line or a control line; a fourth transistor between the second electrode of the first transistor and the OLED, in which a gate electrode is connected to a light emitting control line; and a fifth transistor between a connecting node of the fourth transistor and the OLED and the second power supply or a third power supply.

Organic light emitting display device and pixel circuit

A mother substrate including a plurality of organic light emitting display panels that include pixel circuits having a simple structure, is designed so that a sheet unit test may be performed while preventing or reducing brightness variation during sheet unit test, and a sheet unit test method for the mother substrate. The mother substrate also includes first and second wiring line groups and a compensating unit. The compensating unit is coupled to a coupling line for coupling a wiring line from among the first and second wiring line groups for transmitting a sheet unit test signal to the panels. The compensating unit is also for subtracting a voltage corresponding to a threshold voltage of a driving transistor included in a pixel of the panels from the sheet unit test signal before transmitting the sheet unit test signal to the panels.

Mother substrate of organic light emitting displays capable of sheet unit testing and method of sheet unit testing

A pixel and organic light emitting display device. The pixel includes an organic light emitting diode, first through fourth transistors, and a second capacitor. The fourth transistor is for controlling an amount of current flowing through the organic light emitting diode. A first transistor is coupled between a second terminal of the second capacitor and a data line and is configured to turn on in response to a scan signal supplied to an i-th scan line. A second transistor is coupled between a first terminal of the second capacitor and an initial power source and is configured to turn on in response to an other scan signal supplied to an (i&#x2212;1)-th scan line. A third transistor is coupled between the second terminal of the second capacitor and a reference power source and is configured to turn off in response to an emission control signal supplied to an (i+1)-th emission control line.

Pixel coupled to three horizontal lines and organic light emitting display device using the same

An emission control line driver includes even-numbered stages that are connected to even-numbered emission control lines, respectively, and are driven by a first clock signal, and odd-numbered stages that are connected to odd-numbered emission control lines, respectively, and are driven by a second clock signal, wherein each of the stages includes an input unit adapted to receive a control signal and an inverted control signal output from a previous one of the even and odd numbered stages or from an external source, the input unit being adapted to control voltages of a first node and a second node, a first output unit adapted to generate an emission control signal based on the voltages of the first node and the second node, and a second output unit adapted to generate an inverted emission control signal based on the voltages of the first node and the second node.

Emission control line drivers, organic light emitting display devices using the same and methods of controlling a width of an emission control signal

A pixel, for displaying an image of desired brightness, includes an organic light emitting diode (OLED); a first transistor for controlling an amount of current supplied from a first power source to the organic light emitting diode; a capacitor having a first terminal coupled to a first node as a gate electrode of the first transistor; a plurality of second transistors coupled between a second node as a second terminal of the capacitor and a data line and turned on when a scan signal is supplied to a scan line; another capacitor having a terminal coupled to the second node; and for compensating inferiority of the OLED in displaying an image of desired brightness, a compensator coupled to the plurality of second transistors and a predetermined power source and turned off when a light emission control signal is supplied to a light emission control line.

Pixel and organic light emitting display device using the same

A pixel includes an OLED coupled to a second power supply, a first transistor coupled to a first power supply for controlling current through the OLED, a second transistor coupled between a data line and the first transistor, third transistors coupled between a gate electrode and a second electrode of the first transistor, the second and third transistors configured to be turned on when the scanning signal is supplied to the i-th scanning line, fourth transistors coupled between an initial power supply and the first transistor, and configured to be turned on when the scanning signal is supplied to an i&#x2212;1-th scanning line, a first capacitor coupled between the first power supply and the first transistor, and a second capacitor with a first terminal coupled to nodes between two of the third transistors and two of the fourth transistors, and a second terminal coupled to the first power supply.

A pixel for an organic light emitting diode display is disclosed. The pixel includes an organic light emitting diode, a dummy organic light emitting diode, and a compensator configured to change the current received by the organic light emitting diode according to the difference in threshold voltages of the organic light emitting diode and the dummy organic light emitting diode.

A flat panel display sequentially supplying data signals to a pixel portion using a demultiplexer and a method of driving the flat panel sufficiently supply scan signals in a horizontal period to prevent deformation and distortion of the data signal supplied to each pixel and compensate for a threshold voltage of a drive transistor of the pixel. The flat panel display includes a pixel portion having a plurality of pixels, a scan driver to supply scan signals to the pixel portion, a data driver to generate data signals, a demultiplexer portion to sequentially supply the data signals to the pixel portion, and a lighting tester to supply a lighting test signal and an initialization signal to the pixel portion. Alternatively, the flat panel display includes a pixel portion having a plurality of pixels, a scan driver to supply scan signals to the pixel portion, a data driver to output data signals and a demultiplexer portion to sequentially supply an initialization signal and the data signal to the pixel portion.

Growing community of inventors

Yongin, South Korea

Sam-Il Han