OLED display panel and preparation method thereof

Abstract

The invention relates to the technical field of semiconductor manufacture and particularly to an OLED display panel comprising a transparent substrate including a pixel region and a non-pixel region. An organic thin-film transistor and an organic light-emitting module stacked on the organic thin-film transistor are disposed on the pixel region of the transparent substrate. The invention also discloses a method for preparing the OLED display panel. The transmittance of the display panel is further improved by driving the OLED with the organic thin-film transistor of which at least parts of a plurality of film layer are transparent organic film layers.

Description

technical field [0001] The invention relates to the technical field of semiconductor manufacturing, in particular to an OLED display panel and a preparation method thereof. Background technique [0002] Currently, the transparent display market is estimated to be worth $100 million, and will jump to $87 billion in ten years, nearly doubling every year. Its application fields include many aspects: such as transparent mobile phones, watches, tablet computers, notebook computers, TVs, billboards, windows (buildings, cars, airplanes), etc., but its transmittance rarely exceeds 50%, but the current market The best transmittance is 40%-50%, which needs to be further improved. [0003] The transmittance of each layer of AMOLED with common top emission (TOP) structure is shown in Table 1: [0004] [0005] Table I [0006] It can be seen from Table 1 that the factors affecting the transmittance mainly include TFT (Thin Film Transistor), OLED anode and OLED cathode. [0007] I...

AI Technical Summary

Problems solved by technology

The second type, based on the first technology, the cathode Fine metal mask (FFM) is evaporated to further improve the transparency of the non-pixel area (such as Figure 2b The structure shown); the third is to reduce the number of TFTs, and change the TFT from the current 7T1C to 4T1C or even 2T1C, but it will affect the OLED display effect; the fourth is to change the top-emitting OLED to the bottom-emitting OLED, transparent Although the pass rate has increased, the TFT circuit and wiring are still opaque, and the transparency improvement is limited, and it will cause a decline in OLED efficiency and NTSC, affecting the service life and image quality of OLED; however, TFT still restricts the further improvement of transparency. bottleneck, which is undesirable for those skilled in the art

Images