Bendable display substrate film, manufacturing method thereof and display device

Abstract

The invention discloses a bendable display substrate film, a manufacturing method thereof and a display device. The bendable display substrate film comprises a glass film, wherein the upper surface of the glass film is provided with a plurality of convex parts; a plastic film which covers the glass film, wherein the lower surface of the plastic film is provided with a plurality of concave parts for accommodating the convex parts, the plurality of convex parts are transversely arranged, longitudinally arranged or arrayed on the upper surface of the glass film. The manufacturing process is simple, and the gas barrier property is excellent. In order to avoid glass film breakage or crack generation caused by mechanical impact and thermal impact, the weight of the bendable display substrate film is reduced, and the buffering and shock absorption of the plastic film are utilized, so that the falling resistance and the impact resistance of the bendable display substrate film are remarkably improved.

Description

technical field [0001] The invention relates to a flexible display substrate film, a manufacturing method thereof, and a display device. Background technique [0002] In recent years, driven by the demand for mobile terminal display devices and televisions, liquid crystal display devices (LCD, LiquidCrystal Display), organic light-emitting diode display devices (OLED, Organic Light-emitting Diode) and electronic paper display devices (E-paper, Electronic paper) and others are making continuous progress in thinning, lightening and flexible display screens. Currently, substrate films with both flexibility and impact resistance are indispensable for curved displays on large panels that pursue a realistic sense of presence, and for flexible mobile terminal devices that pursue portability, convenience, and safety. lack. [0003] The substrate widely used in the flat panel display in the prior art is a glass substrate; if a flexible function is given to the glass substrate to re...

AI Technical Summary

Problems solved by technology

However, the glass film still has the following serious problems: due to the relatively weak bending degree and weak impact resistance, the glass substrate film is easily broken during the manufacturing process of the display screen, and the display screen is sometimes broken during use. Occurrence, especially instantaneous excessive bending is likely to cause hidden defects of the glass film, resulting in cracks during subsequent processing and use

However, if only plastic film is used, the negative impact of thermal deformation of the film on the display is difficult to avoid, and the performance requirements of the display screen on the film's oxygen barrier and water vapor barrier (such as oxygen barrier property and water vapor barrier property) are also very high. can not satisfy

Because of this, the usual practice is to vapor-deposit a film layer composed of inorganic materials on the plastic film. Such a film layer is expensive and the effect is not very satisfactory, which is not conducive to reducing the cost of the display and improving the life of the display screen, and hinders flexible display. screen to gain wider application

In order to improve the performance of oxygen barrier and water vapor barrier of plastic film, the Japanese patent of JP 2004-82598 proposes a gas barrier laminated material with a metal oxide film and an organic material layer laminated on the substrate. This method is One of the representative methods, but in the organic electroluminescent display device that requires the performance of oxygen barrier and water vapor barrier, the gas barrier property of the laminated material used in the above-mentioned Japanese patent is still insufficient; it is natural to think that, A flexible film with excellent flexibility and good gas barrier properties can be realized by multi-layer stacking, for example, comprising inorganic glass and resin layer substrates respectively arranged on both sides of the inorganic glass, and one of the resin layer substrates without inorganic One side of the glass is provided with an inorganic film, and the inorganic film is formed on at least one peripheral portion of the corresponding resin layer substrate; however, there are still problems in such overlapping films: if the glass film is too thin, the impact resistance is insufficient and defects are easily generated. The bendability of the glass film is significantly reduced when the glass film is too thick

It can be seen that simple superimposition of glass film, plastic film or coating cannot solve the problem of insufficient bendability and impact resistance of the flexible substrate film, which is prone to defects.

Images