Abstract:
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.
Abstract:
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.
Abstract:
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.
Abstract:
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.
Abstract:
A pixel, a display device using the same, and a driving method thereof are disclosed. According to exemplary embodiments of the pixel, the display device including the same, and the driving method thereof, 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.
Abstract:
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.
Abstract:
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.
Abstract:
An electron emission display includes an electron emission unit on a first substrate adapted to emit electron beams, a light emission unit on a second substrate, the light emission unit including a plurality of photoluminescent layers facing the electron and emission unit, a plurality of spacers between the first and second substrates along a first direction, wherein each photoluminescent layer of the plurality of photoluminescent layers satisfies a proviso that (a−b)/2>c, where “a” is a length of the photoluminescent layer in a second direction, “b” is a magnitude of an electron beam spot on the photoluminescent layer in the second direction, and “c” is a shifting distance of the electron beam spot in the second direction.
Abstract:
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.
Abstract:
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.