Display Circuit Board Sealing Structure for Step Planarization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in protecting circuit boards from external factors and preventing appearance defects due to the stepped portions formed by circuit boards, which are not adequately addressed by existing technologies.
Innovation Solution
A display device design that includes a sealing material covering the top and side surfaces of circuit boards, with a first sealing material covering at least some of the circuit board portions and a second sealing material between the lateral side of the display substrate and the circuit board, ensuring protection and planarization of the circuit board edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If circuit boards are disposed on the display substrate, then electrical connection and functionality are achieved, but stepped portions are formed causing appearance defects
Solution Approach 1:
The sealing material extends in the vertical dimension (thickness direction) to cover the stepped portions formed by the circuit boards. By adding this vertical dimension coverage, the sealing material eliminates the appearance defect while maintaining the electrical connection functionality of the circuit boards disposed on the display substrate.
Solution Approach 2:
The sealing material acts as an intermediary element between the circuit boards and the external environment. It covers the stepped portions and lateral sides, mediating the appearance issue by providing a uniform outer surface while allowing the circuit boards to maintain their functional positioning for electrical connection.
2Ease of manufacture
If circuit boards are disposed on the display substrate, then electrical connection is achieved, but the circuit boards are exposed to external factors
Solution Approach 1:
The sealing material functions as a protective shell that covers both the lateral sides and the stepped portions of the circuit boards. This shell structure protects the circuit boards from external harmful factors such as moisture and dust, while allowing the circuit boards to remain disposed on the display substrate for electrical connection functionality.
3Object-affected harmful factors
If sealing material covers the circuit boards, then protection from external factors is achieved, but device complexity increases
Solution Approach 1:
The sealing material performs multiple functions simultaneously: it protects the circuit boards from external harmful factors, covers the stepped portions to eliminate appearance defects, and provides a uniform outer surface. By consolidating these multiple functions into a single component, the design achieves protection without proportionally increasing device complexity.
Data Source
AI summary
A display device includes: a display substrate having a display area and a pad area at one side of the display area; an optical layer on the display area of a first surface of the display substrate; a circuit board on the pad area of the display substrate; and a first sealing material on the pad area of the display substrate to cover the circuit board. The circuit board has: a first portion attached to the first surface of the display substrate, a second portion bent downwardly from the first surface and attached to another surface of the display substrate, and a third portion bent between the first portion and the second portion. The first sealing material covers at least some of the first portion and the third portion.