Polarization Structure with Integrated Light Shielding for OLED Displays
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Solution Overview
Problem
Existing OLED displays face challenges in reducing ambient light reflection and simplifying manufacturing processes, particularly due to the exposure of light shielding layers to environmental contamination and complex manufacturing processes when a black matrix is used between the polarization film and the display panel.
Innovation Solution
A polarization structure incorporating a retardation layer, polarizing layer, and polarizing pattern with specific orientations and configurations is employed, which includes a base layer, adhesive layers, protection layers, and a surface treatment layer, allowing the polarizing pattern to surround the retardation and adhesive layers, thereby shielding the peripheral circuit and reducing the need for additional frames or light shielding layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a black matrix is used between the polarization film and the display panel to shield the peripheral circuit, then the peripheral circuit is protected from light, but the manufacturing process becomes complex and the light shielding layer is exposed to environmental contamination
Solution Approach 1:
The patent combines the light shielding function with the polarization structure by integrating a polarizing pattern directly into the polarization film. This merging eliminates the need for a separate black matrix layer, simplifying the manufacturing process while maintaining the light shielding function for peripheral circuit protection.
Solution Approach 2:
The polarization film is given multiple functions: it maintains its primary polarization function while also serving as a light shielding layer through the integrated polarizing pattern. This multi-functionality eliminates the need for additional dedicated light shielding layers, reducing manufacturing complexity.
2Reliability
If additional light shielding layers are added to shield the peripheral circuit, then the shielding effect is improved, but the manufacturing process becomes more complex and additional materials are required
Solution Approach 1:
The light shielding function is merged into the existing polarization film through the polarizing pattern, eliminating the need for additional light shielding layers. This integration maintains shielding effectiveness while simplifying the manufacturing process by reducing the number of layers and materials required.
3Ease of manufacture
If the polarization structure uses a simple design without polarizing pattern, then the manufacturing process is simple, but the optical characteristics are insufficient and peripheral circuit is exposed
Solution Approach 1:
The polarizing pattern is applied locally in specific regions where light shielding is needed, rather than uniformly across the entire polarization film. This local application maintains manufacturing simplicity while providing the necessary optical characteristics and peripheral circuit protection in targeted areas.
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 enhances optical characteristics by effectively shielding the peripheral circuit, simplifies the manufacturing process, and eliminates the need for additional frames or bezels, while maintaining the durability of the OLED display.
Implementation Method 1
The retardation layer may be configured to produce a phase difference between at least two polarization components of a light incident onto the display device
Implementation Method 2
The retardation layer may be configured to produce a phase difference between at least two polarization components of a light incident onto the display device
Implementation Method 3
The polarizing layer may have an adsorption axis along a first direction over the retardation layer
Data Source
AI summary
A polarization structure for a display device is disclosed. In one embodiment, the polarization structure includes a retardation layer, a polarizing layer and a polarizing pattern. The retardation layer may be configured to produce a phase difference between two polarization components of an incident light. The polarizing layer may have an adsorption axis along a first direction on the retardation layer. The polarizing layer may include a first region and a second region surrounding at least one side of the first region. The polarizing pattern may have an adsorption axis along a second direction perpendicular to the first direction in the second region.