Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises at least one pixel, an auxiliary electrode layer and a first organic material layer. The pixel comprises an organic light-emitting component which is provided with a first electrode layer. The auxiliary electrode layer is arranged adjacent to the pixel, and is provided with a through hole arranged corresponding to the pixel, the through hole is defined by a side wall of the auxiliary electrode layer, and the first electrode layer is electrically connected with the auxiliary electrode layer through the side wall. The first organic material layer is arranged in the through hole. The invention further discloses a display device with the display panel.

Description

technical field [0001] The present invention relates to a display panel and a display device, in particular to an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panel and a display device. Background technique [0002] Organic light-emitting diodes have the advantages of self-illumination, high brightness, high contrast, light and thin volume, low power consumption, and fast response. Therefore, they have been gradually applied to various display image systems, such as organic light-emitting display devices. Among them, organic light-emitting display devices can be divided into passive-matrix (Passive-Matrix) and active-matrix (Active-Matrix) according to their driving methods. Although the active matrix organic light emitting display device is more expensive and the manufacturing process is more complicated, it is suitable for full-color display with large size, high resolution and high information capacity, and it also saves power. Therefore, it ...

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Problems solved by technology

[0006] However, since the display device 1 emits light upwards, the common electrode layer 111 is a transparent electrode layer. Therefore, it needs to have good light transmittance, and is generally made of metals such as calcium, magnesium, lithium, silver, or alloy materials thereof, and In order not to affect the light transmission, the thickness of this layer is relatively thin, so the resistance is high

In order to reduce the impedance, a multi-layer film structure can be made of a light-transmitting metal oxide and the above metals or alloys, such as indium-tin oxide (ITO) or indium-zinc oxide (indium-zinc oxide) , IZO), but the impedance of this type of metal oxide material is still higher than that of metal, resulting in the impedance of the common electrode layer 111 being much higher than that of ordinary metal electrodes.

Therefore, in the case of a large-scale display device, when the driving signal is transmitted to, for example, the pixel P in the central area of ​​the display panel 11 through the wires 12 and 13, the voltage drop of the driving voltage will be too large because the impedance of the common electrode layer 111 is too large. High (that is, IR drop), resulting in insufficient driving current, and then causing uneven brightness of the display device 1 (such as the Mura phenomenon)

In addition, in the manufacturing process of making the organic light-emitting element E, the complexity of evaporating the organic light-emitting material is quite high, so that the cost of the display device 1 is also quite high.

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