Chip-on-Film Bending Guide for Slim Display Bezel Reliability
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Solution Overview
Problem
The protrusion of chip-on-film from the display panel affects aesthetics and is vulnerable to external impacts, leading to potential damage and malfunction, especially in flexible and slim structures.
Innovation Solution
Incorporating a bending guide at the bendable portion of the chip-on-film to control its curvature and an elastic deformation reinforcing portion to buffer external impacts, preventing excessive bending and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the chip-on-film is excessively bent to reduce protrusion length, then the aesthetics and bezel area are improved, but the chip-on-film may be damaged causing malfunction or failure
Solution Approach 1:
A bending guide structure is provided in advance at the position where the chip-on-film will be bent. This bending guide has a predetermined curvature radius that prevents excessive bending by guiding the chip-on-film along a safe bending path, thereby cushioning against potential damage before it occurs.
Solution Approach 2:
The bending guide acts as an intermediary structure between the chip-on-film and the housing. It mediates the bending process by providing a predetermined curvature path, ensuring that the chip-on-film is bent within safe limits while still achieving the desired reduction in protrusion length.
2Weight of moving object
If the chip-on-film is made thin to reduce weight and improve flexibility, then the ease of assembly and space occupation are improved, but the vulnerability to external impact increases
Solution Approach 1:
An elastic deformation reinforcing portion is provided in advance at the bent portion of the chip-on-film. This reinforcing portion can elastically deform to absorb external impacts, providing beforehand cushioning that protects the thin chip-on-film from damage while maintaining its lightweight and flexible characteristics.
Solution Approach 2:
The chip-on-film incorporates an elastic deformation reinforcing portion that combines different material properties. The main body remains thin and flexible for weight reduction, while the reinforcing portion provides enhanced impact resistance through elastic deformation capabilities.
3Area of stationary object
If the bending guide is made with a small curvature radius to reduce protrusion length, then the aesthetics are improved, but the chip-on-film may be damaged due to excessive bending
Solution Approach 1:
The bending guide is designed with an optimal curvature radius that balances two competing requirements: it is small enough to reduce the protrusion length and bezel area for aesthetic purposes, but large enough to prevent excessive bending that would damage the chip-on-film. This parameter optimization resolves the contradiction between aesthetics and strength.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The bending guide maintains the chip-on-film's curvature within a designed range, reducing damage and enhancing aesthetics while effectively absorbing external impacts.
Implementation Method 1
a bending guide formed at a position corresponding to the bendable portion of the chip-on-film and guiding a bent shape of the chip-on-film
Data Source
AI summary
A display apparatus includes a display panel for reproducing an image or a video, a metal plate disposed in the rear of the display panel, a printed circuit board disposed in the rear of the metal plate and electrically connected to the display panel, and a chip-on-film having one end electrically connected to the display panel and the other end electrically connected to the printed circuit board, wherein a portion of the chip-on-film is bendable, and the metal plate includes a bending guide formed at a position corresponding to the bendable portion of the chip-on-film and guiding a bent shape of the chip-on-film. The bending guide disposed in a portion where the chip-on-film is bent may prevent a curvature of the chip-on-film from deviating from a designed range of the curvature, thereby suppressing excessive bending of the chip-on-film.