Flexible Circuit Board Adhesion Patterns for Display Panel Alignment
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Solution Overview
Problem
As display devices increase in size, the flexibility of their circuit boards leads to drooping edges, making it difficult to align pads on the flexible circuit boards with those on the display panel, resulting in reduced stress and stiffness, which complicates the connection process.
Innovation Solution
Incorporating adhesion patterns on the flexible circuit boards that extend in specific directions, such as perpendicular or diagonal to the display panel's edges, to enhance the stress and stiffness of the boards, facilitating easier alignment and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of flexible circuit boards is increased to support larger display devices, then the display device can be made larger, but the degree of bending and drooping of the flexible circuit boards increases, making pad alignment difficult
Solution Approach 1:
The flexible circuit board is divided into multiple regions with different adhesion pattern densities. The first region (near the display panel) has a higher density of adhesion patterns compared to the second region, creating segmented stiffness distribution that prevents drooping while maintaining flexibility where needed.
Solution Approach 2:
Different regions of the flexible circuit board are given different local properties through varying adhesion pattern densities. The first region has enhanced stiffness through higher adhesion pattern density to prevent drooping, while the second region maintains lower density for flexibility, achieving local optimization of mechanical properties.
2Ease of operation
If the flexibility of the circuit board is maintained for ease of connection, then the board can be easily installed, but the edges droop downward making alignment difficult
Solution Approach 1:
The adhesion patterns are segmented into different density zones: a first region with higher density near the display panel for structural support, and a second region with lower density for flexibility. This segmentation allows the board to be both easy to install and resistant to drooping.
Solution Approach 2:
The density parameter of adhesion patterns is changed across different regions of the flexible circuit board. By varying the density from the first region to the second region, the board achieves different mechanical properties in different zones, balancing flexibility and droop resistance.
Data Source
AI summary
A display device is provided. The display device includes a display panel including a plurality of pixels, at least one flexible circuit board connected to one side of the display panel and including a first portion and a second portion around the first portion, a source driving chip on the first portion, and a plurality of adhesion patterns on the second portion and extending in a set or predetermined direction.