US 9,754,532 B2 · Pixel repair circuit and organic light-emitting diode (OLED) display having the same

Abstract

A pixel repair circuit and organic light-emitting diode (OLED) display having the same are disclosed. In one aspect, the pixel repair circuit includes an emission controller configured to control the emission current and a repair line initialization unit configured to initialize the repair line. The pixel repair circuit further includes a current mirror unit configured to provide a mirror current of the emission current to the repair line initialization unit, wherein the current mirror unit is connected between a power supply voltage and the emission controller. The pixel repair circuit also includes a first emission switch configured to control an electrical connection between the emission controller and the current mirror unit based on an emission control signal and a second emission switch configured to control an electrical connection between the emission controller and the repair line based on the emission control signal.

Claims20

Dependent claims

A pixel repair circuit that provides an emission current to an organic light-emitting diode (OLED) through a repair line, the circuit comprising:

an emission controller configured to control the emission current based on a scan signal and a repair data signal;
a repair line initialization unit configured to initialize the repair line, wherein the repair line initialization unit is connected to a first node between the repair line and the emission controller;
a current mirror unit configured to provide a mirror current of the emission current to the repair line initialization unit, wherein the current mirror unit is connected between a power supply voltage and the emission controller;
a first emission switch configured to control an electrical connection between the emission controller and the current mirror unit based on an emission control signal;
and
a second emission switch configured to control an electrical connection between the emission controller and the repair line based on the emission control signal.

3 more elements

An organic light-emitting diode (OLED) display, comprising:

a display panel including a plurality of pixel circuits each having an OLED;
a dummy pixel circuit located outside of the display panel, wherein the dummy pixel circuit includes a plurality of pixel repair circuits each configured to provide an emission current to a corresponding one of the OLEDs through a corresponding repair line;
a scan driver configured to provide a plurality of scan signals to the pixel circuits and the pixel repair circuits;
a data driver configured to:
i) provide a plurality of data signals to the pixel circuits and ii) provide a plurality of repair data signals respectively corresponding to the data signals to the pixel repair circuits;
an emission driver configured to provide an emission control signal to the pixel circuits and the pixel repair circuits;
and
a timing controller configured to control the scan driver, the data driver, and the emission driver,
wherein each of the pixel repair circuits is configured to initialize the repair line based on a repair line initializing voltage.

6 more elements

Dependencies are inferred from the claim text.

Pixel repair circuit and organic light-emitting diode (OLED) display having the same

Life of this patent

Pixel repair circuit and organic light-emitting diode (OLED) display having the same

Life of this patent

Abstract

Claims20