Electronic Device And Method Of Manufacturing 1He Same

What is this patent about?

’794 is related to the field of foldable electronic devices, specifically addressing the challenges of creating durable and flexible cover plates for foldable screens. Existing solutions using plastic films suffer from crease damage and reduced optical performance after repeated folding. The use of adhesives between layers also increases thickness and can lead to crack formation.

The underlying idea behind ’794 is to create a foldable screen cover plate by directly laminating a thin glass layer between one or more transparent polymer layers without using adhesives. This direct lamination aims to reduce the overall thickness of the cover plate, improve its bending resistance, and prevent the formation of cracks and bubbles that can occur with adhesive-based solutions.

The claims of ’794 focus on an electronic device comprising a cover plate, a touch sensing layer, and a display module. The cover plate consists of a glass layer with a first and second surface, and at least one transparent covering layer, such as polyimide or colorless polyimide (CPI), disposed on and in contact with at least one of the glass layer's surfaces. The glass layer is laminated between two transparent covering layers.

In practice, the transparent polymer layer is coated directly onto the glass layer using a liquid polymer material, which is then dried to form a solid, adherent layer. This process avoids the need for adhesives like OCA, simplifying manufacturing and reducing the potential for defects. The addition of inorganic mixtures like graphene to the polymer layer can further enhance the cover plate's Young's modulus, improving its overall strength and durability.

This approach differentiates itself from prior solutions by eliminating adhesives, which are prone to cracking and increase thickness. By directly laminating the polymer layer onto the glass, the cover plate achieves a thinner profile, improved bending resistance, and enhanced optical performance. The use of ultra-thin glass, combined with the flexibility of the polymer layer, creates a cover plate that can withstand repeated folding without significant degradation.