Composite substrate, flexible display device and preparation method thereof

Abstract

The invention discloses a composite substrate, a flexible display device and a preparation method thereof. The composite substrate comprises a first substrate and a flexible substrate. The flexible substrate comprises a first organic film layer and a second organic film layer. The first organic film layer is arranged on the first substrate. At least one layer of inorganic film layer is arranged between the first organic film layer and the second organic film layer. According to the embodiments, a lower protection film layer does not need to be pasted to the surface, far away from a display element, of the flexible substrate, and no releasing layer or stripping layer is arranged between the flexible substrate and the first substrate, so that the preparation yield of displays is increased, and a display effect is improved.

Description

technical field [0001] The invention relates to flat panel display technology, in particular to a composite substrate, a flexible display device and a preparation method thereof. Background technique [0002] Display panels are currently widely used in portable electronic products such as mobile phones and PDAs (Personal Digital Assistant, PDA), such as: Thin Film Transistor-Liquid Crystal Display (TFT-LCD), Organic Light Emitting Diode (OLED) , low temperature polysilicon (LowTemperaturePoly-silicon, LTPS) display and plasma display (PlasmaDisplayPanel, PDP), etc. Driven by market competition, display devices that are lighter, have better display effects, and lower prices are increasingly sought after. [0003] The manufacturing process of the existing flexible organic electroluminescent display device includes: (1) forming a release layer or a release layer on a glass substrate; (2) forming a flexible substrate on a release layer or a release layer; (3) forming a release ...

AI Technical Summary

Problems solved by technology

Due to the unevenness of the release layer or the surface of the glass layer, the thickness of the coated polyimide layer will be uneven, which will affect the display effect of the display; and the release layer needs to choose a high temperature resistant material, and the selectivity is small. And the adhesion of the release layer is relatively low. If the flexible substrate is displaced during the process of manufacturing the display device, it will reduce the yield of the display and affect the display effect of the display.

Moreover, a certain thickness of release layer or peeling layer will remain on the display device, which increases the thickness of the display device and cannot meet the market demand for thin display devices.

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