OLED array substrate, display device and method for repairing dark spots thereof

Abstract

The application provides an organic light emitting diode (OLED) array substrate, a display device and a method for repairing dark spots thereof. The OLED array substrate includes: a power supply line, a connecting part; a pixel structure arranged in the pixel area, the pixel structure includes a driving transistor and an OLED device, the connecting part has a first end and a second end, and the first end is connected to the second end of the OLED device. An electrode is electrically connected or arranged to be weldable with the first electrode, and the second terminal is electrically connected to the second source-drain electrode or the power supply line, or is arranged to be weldable with the second source-drain electrode or the power supply line of the drive transistor, and the connecting part The first electrode (anode or cathode) of the OLED device is electrically connected to the power supply line through the connecting part, and then the conductive foreign matter between the anode and the cathode of the OLED device is not electrically connected to the power line before welding. Burning is used to repair the dark spots of the display device. The dark spot repair method is easy to operate and will not cause adverse effects on peripheral circuits.

Description

technical field [0001] Embodiments of the present invention relate to an organic light emitting diode (OLED) array substrate, a display device and a method for repairing dark spots thereof. Background technique [0002] Organic light-emitting diode (OLED) display devices are active light-emitting devices. Compared with the mainstream thin film transistor liquid crystal display (Thin Film Transistor-Liquid Crystal Display, TFT-LCD), OLED devices have high contrast, wide viewing angle, low power consumption, light and thin OLED devices have received more and more attention due to their advantages. [0003] An OLED device includes an anode, a cathode, and a light emitting layer disposed between the anode and the cathode. When a voltage is applied between the anode and the cathode, holes and electrons move to the light-emitting layer, and the holes and electrons recombine in the light-emitting layer to emit light. During the preparation process of OLED display devices, residua...

AI Technical Summary

Problems solved by technology

During the preparation of OLED display devices, residual impurities are likely to cause local short circuits between the anode and the cathode, resulting in dark spot defects.

During the use of OLED display devices, the size of dark spots may gradually increase, until finally the entire pixel unit becomes a dark pixel that cannot be lit, resulting in a decrease in the reliability of OLED display devices

Or, OLED display devices may have bright spot defects due to defects in components such as TFT (Thin Film Transistor) in the pixel structure (for example, a short circuit between the anode and the power line)

[0004] For dark spot defects, the conventional repair method is to use laser to remove impurities in the short-circuit area, but this method will damage the surrounding display area; for bright spot defects, the conventional repair method is to make backup lines on the array substrate, or cut off the Data lines, and then welding to connect the end of the TFT close to the OLED to a fixed potential, so that the cathode and anode of the OLED maintain the same potential to eliminate bright spot defects, but this method will occupy the wiring space, thereby affecting the aperture ratio

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