Display panel and preparation method thereof, and display device

Abstract

The present invention provides a display panel and a preparation method thereof, and a display device, belonging to the technical field of display. The objective of the invention is to reduce the electrode resistance of a luminescent device and facilitate achievement of ultrathin performance of an ITD display panel. The display panel comprises: a substrate; a luminescent device layer arranged at the upper portion of the substrate; and a touch structure layer arranged at one side, far away from the substrate, of the luminescent device layer, wherein the luminescent device layer comprises a plurality of luminescent devices, each luminescent device comprises one first electrode, one luminescent function layer and one second electrode which are arranged far away from the substrate in order, the touch structure layer comprises a plurality of third electrodes, and at least one of the third electrodes is in contact with the second electrode.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display panel, a manufacturing method thereof, and a display device. Background technique [0002] Compared with liquid crystal display devices, OLED (Organic Light-Emitting Diode) display devices have advantages such as self-illumination, fast response, wide viewing angle, high brightness, bright colors, and thinness, and are considered to be the next generation display technology. According to the different light emitting directions, the self-luminous elements in OLED display devices, that is, OLED devices, can be divided into bottom emission type (or called bottom emission type, that is, emitting light downward relative to the substrate) and top emission type (or called top emission type). type, that is, emit light upward relative to the substrate) two types. [0003] In traditional technology, OLED devices usually adopt the bottom emission type, in which the light emitted...

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Problems solved by technology

[0004] However, since the aperture ratio of OLED display devices with bottom-emitting OLED devices is limited by opaque structures such as TFT (Thin Film Transistor, thin film transistors), it is difficult for emissive OLED display devices to achieve high-resolution display requirements. Therefore, OLED display devices with top-emitting OLED devices are mostly used in the prior art

However, in the top-emitting OLED device, the light needs to be emitted from the cathode side, so the thickness of the cathode needs to be prepared thinner, resulting in excessive cathode resistance and voltage drop.

[0005] In addition, in the Integrated-touch-driver (ITD for short) technology, it is difficult to further realize the ultra-thinning of the ITD display device because touch electrodes need to be provided in the OLED display device.

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