Integrated Front Light Assembly Thickness Reduction
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Solution Overview
Problem
The thickness of reflective display devices with touch-control functions is increased due to the use of bonding agents between the front light, touch units, and protective substrates, and the display effect is compromised by inconsistent reflectivity across layers.
Innovation Solution
An integrated front light assembly is designed with a protective substrate, a touch-control layer, and a light guide layer, where the touch-control layer and light guide layer are directly disposed on the protective substrate, eliminating the need for bonding agents between them, and incorporating optical re-directional structures to ensure uniform light propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If bonding agents are used to bond the front light source, touch units, and protective substrate, then the components can be assembled together, but the thickness of the display device increases
Solution Approach 1:
The patent integrates the front light source and touch units into a single integrated front light assembly structure. The light guide plate and touch-sensitive substrate are combined into one component, eliminating the need for separate bonding layers and reducing overall device thickness while maintaining assembly functionality.
Solution Approach 2:
The patent removes the bonding agent layers from the structure by redesigning the interface between components. The integrated front light assembly uses a unified substrate that eliminates the need for adhesive bonding layers, thereby extracting the thickness contribution of bonding agents from the device.
2Ease of manufacture
If bonding agents are used between layers, then the components can be bonded together, but the reflectivity consistency across layers deteriorates
Solution Approach 1:
The patent removes bonding agents from the optical path by integrating components into a single structure. The unified substrate eliminates intermediate bonding layers that caused reflectivity inconsistencies, thereby extracting the source of optical interference from the system.
Solution Approach 2:
The integrated front light assembly uses a homogeneous substrate material throughout, eliminating the heterogeneous interfaces created by bonding agents. This homogeneity ensures consistent optical properties and reflectivity across the entire assembly without the need for multiple material junctions.
3Adaptability or versatility
If multiple separate components (front light source, touch units, protective substrate) are used, then each component can be optimized independently, but the overall structure becomes more complex
Solution Approach 1:
The patent combines the front light source and touch units into a single integrated assembly where both functions share a common substrate and structural framework. This merging reduces the number of separate components and interfaces while maintaining the ability to optimize both functions within the unified structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the thickness of the display device, improves the display effect by eliminating the need for consistent bonding agent reflectivity, simplifies the structure, and lowers manufacturing costs.
Implementation Method 1
a light guide layer disposed on the touch-control layer; and a light source disposed on at least one side of the light guide layer
Implementation Method 2
plural optical re-directional structures disposed between the second insulating layer and the light guide layer
Data Source
AI summary
An integrated front light assembly, a manufacturing method thereof and a reflective display device are disclosed. The integrated front light assembly includes a protective substrate; a touch-control layer disposed on the protective substrate; a light guide layer disposed on the touch-control layer; and a light source disposed on at least one side of the light guide layer. The reflective display device comprises a display panel and the integrated front light assembly. In this way, a thickness of the reflective display device can be reduced and a display effect of the reflective display device can be improved.