Triple-Layer Display Panel Light Leakage Prevention
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Solution Overview
Problem
Existing display panel manufacturing methods face challenges in achieving a simple configuration with high durability and preventing light leakage, while maintaining reliable adhesion and avoiding peeling issues, especially in double-layered structures and insert molding processes.
Innovation Solution
A display panel with a triple-layer structure comprising a first printed display layer, a transparent material layer, and a second printed display layer, where the second layer is displayed through the transparent material layer, enhancing durability and visibility, and an insert molding method using upper and lower dies to ensure stable integration of sheets without warping or peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive is used to adhere the rear printed sheet to the panel base body, then the assembly process is simple, but light leakage occurs and appearance is degraded
Solution Approach 1:
The patent merges the adhesion function and light blocking function into a single integrated structure. The rear printed sheet is designed to extend beyond the panel base body edges, creating an overlapping configuration where the sheet itself serves both as the display element and as the light-blocking barrier, eliminating the need for separate adhesive layers while preventing light leakage paths.
Solution Approach 2:
The patent introduces the extending rear printed sheet as an intermediary element between the panel base body and the external environment. This extending sheet acts as a mediator that blocks light paths that would otherwise leak through gaps at the edges, while also serving as the visible display surface from the front.
2Object-affected harmful factors
If the panel base body thickness is increased to reach the light path, then light leakage is prevented, but the structure becomes more complex and costly
Solution Approach 1:
The patent segments the light-blocking function from the panel base body structure itself. Instead of increasing the thickness of the entire panel base body, the light-blocking function is segmented and assigned to the extending rear printed sheet, which only needs to extend slightly beyond the edges to effective block light paths.
Solution Approach 2:
The patent applies the light-blocking property locally at the critical edges where light leakage occurs, rather than uniformly throughout the entire panel base body. The rear printed sheet extends specifically at the peripheral regions to block light paths, while the central display area maintains its original transparency and thickness characteristics.
3Object-affected harmful factors
If the rear printed sheet is disposed close to the light source, then light leakage is eliminated, but the sheet peels off during repeated switch operations
Solution Approach 1:
The patent merges the light-blocking function with the structural reinforcement function. The extending rear printed sheet not only blocks light leakage but also creates friction and mechanical interlocking with the panel base body edges, providing natural retention that prevents peeling during repeated operations without requiring additional adhesives.
Solution Approach 2:
The patent enables the rear printed sheet to self-retain through its own geometric configuration. The extending edges create mechanical interlocking and friction with the panel base body, allowing the sheet to maintain its position and prevent peeling through its own structure rather than relying on external adhesive materials.
4Productivity
If a double-layered structure is formed with printed layers on both surfaces, then display efficiency is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent makes the rear printed sheet multi-functional. It serves as both the rear display element (providing display efficiency through the double-layered effect) and as the light-blocking barrier at the edges. This universality eliminates the need for separate components, reducing manufacturing complexity while maintaining the display efficiency benefits of the double-layered structure.
Data Source
AI summary
A display panel which is adapted to be mounted on an electronic apparatus, includes a first printed display layer, a transparent material layer that is provided on the first printed display layer, and a second printed display layer that is provided on the transparent material layer so as to correspond to the first printed display layer. The first printed display layer, the transparent material layer and the second printed display layer are integrally formed to each other. The second printed display layer is displayed from the first printed display layer side through the transparent material layer.