Display COF Protection Structure for Reduced Bezel Exposure
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Solution Overview
Problem
The exposure of the chip on film (COF) in display apparatuses, which is prone to damage and affects aesthetics due to its protrusion, necessitates a solution to minimize external exposure and enhance protection.
Innovation Solution
A protective film is attached to the guide holder, covering the chip on film, and a rib structure is integrated to stabilize the film, preventing external exposure and damage from impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the chip on film is made thin and flexible to reduce space and improve assembly convenience, then assembly convenience is improved and space is reduced, but the chip on film becomes vulnerable to external impact and damage
Solution Approach 1:
A protective film is attached to the guide holder in advance to cover and protect the chip on film before it is exposed to external impact. This beforehand cushioning prevents damage to the thin and flexible chip on film while maintaining its assembly advantages.
2Reliability
If the chip on film protrudes from the display panel to enable electrical connection, then electrical connection is achieved, but the protruding portion reduces aesthetics and increases the area of the bezel
Solution Approach 1:
The protective film extracts and covers the protruding chip on film portion, separating it from the visible display area. This allows the chip on film to maintain its necessary protrusion for electrical connection while minimizing its visual impact and reducing the effective bezel area.
3Reliability
If the chip on film is exposed to the outside for electrical connection, then electrical connection is enabled, but the exposed portion is vulnerable to damage from external impact
Solution Approach 1:
The protective film acts as an intermediary between the chip on film and external impact factors. It covers the exposed chip on film portion, allowing electrical connection to function while blocking harmful external impacts from reaching the vulnerable chip on film.
Data Source
AI summary
A display apparatus can include a display panel configured to display an image, a polarizer and a touch sensor disposed in front of the display panel, an adhesive layer disposed between the touch sensor and the polarizer, a back plate disposed in rear of the display panel, a metal plate disposed in rear of the display panel, a guide holder disposed in rear of the metal plate, a printed circuit board mounted on the guide holder and electrically connected to the display panel, a chip on film (COF) electrically connecting the display panel and the printed circuit board, and a protective film disposed in rear of the chip on film. The chip on film includes a bending portion that extends beyond ends of the back plate and the guide holder. The guide holder includes a rib formed at an end of the guide holder.