Glass Substrate Display Back Connection Insulating Layer
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Solution Overview
Problem
Existing display apparatuses with self-emitting light emitting devices on glass substrates face challenges in minimizing the width of non-display fringe parts and protecting electrical connections from damage during manufacturing and assembly, which affects the aesthetic appeal and reliability of the displays.
Innovation Solution
The display apparatus features a glass substrate with a pixel structure on one surface and a back connection member on the other surface, connected via an insulating layer, along with a side wiring line and a light-blocking overcoat layer to reduce fringe part width and protect electrical connections, allowing for efficient signal transmission and enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the back connection member is disposed on the back face of the glass substrate to electrically connect the input electrode, then the electrical connection is established, but the connection structure is exposed and vulnerable to damage during manufacturing and assembly
Solution Approach 1:
The patent applies beforehand cushioning by forming a protective insulating layer over the back connection member before subsequent manufacturing and assembly steps. This insulating layer acts as a protective cushion that prevents damage to the electrical connection during handling, bonding, and assembly operations, while still allowing electrical functionality to be established.
Solution Approach 2:
The patent introduces an insulating layer as an intermediary between the back connection member and the external environment. This intermediary layer protects the electrical connection from mechanical damage while maintaining the necessary electrical connectivity, effectively mediating between the need for exposed connections and the need for protection.
2Area of stationary object
If the fringe part width is minimized to improve display aesthetics, then the visible display area is maximized, but the protection and insulation of electrical connections becomes more difficult
Solution Approach 1:
The patent resolves this contradiction by transitioning to a three-dimensional solution: forming an insulating layer with a height dimension that extends above the back connection member. This vertical dimension allows the fringe part width to be minimized for aesthetic purposes while the elevated insulating layer provides sufficient protection for the electrical connection without requiring additional horizontal space.
3Reliability
If the top face of the insulating layer is positioned above the back connection member to provide protection, then connection reliability is improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent merges the protective insulating layer formation with the existing bonding process. The insulating layer is formed as part of the bonding preparation steps, combining the protection function with the existing manufacturing workflow rather than adding a separate, complex process step. This integration minimizes the increase in manufacturing complexity while achieving the desired protection.
Data Source
AI summary
A display apparatus includes: a glass substrate; a light emitting device included in a pixel structure disposed on one principal surface of the glass substrate; an input electrode, disposed on the one principal surface, for inputting a driving signal to the light emitting device; and a back connection member disposed on the other principal surface of the glass substrate so as to be electrically connected to the input electrode. A back insulating layer is disposed on the other principal surface, and a top face of the back insulating layer is located above a top face of the back connection member.