Optical Display Polarizing Plate Light Shielding Layer
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Solution Overview
Problem
Optical displays face challenges in concealing metal interconnection layers and decorative frames, leading to increased thickness and poor appearance, while also being susceptible to deformation due to temperature and humidity changes, and visibility differences between display and non-display regions.
Innovation Solution
The optical display design features a TFT substrate extending beyond the color filter substrate with a light shielding layer in the polarizing plate to conceal the metal interconnection layers, eliminating the need for a decorative frame and incorporating a securing member to prevent deformation of the polarizing plate under temperature and humidity changes, while minimizing visibility differences between display and non-display regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a rigid decorative frame is used to prevent metal interconnection layer visibility, then the metal interconnection layer is concealed, but the thickness of the optical display increases
Solution Approach 1:
The patent removes the rigid decorative frame from the optical display structure and replaces it with a flexible polarizing plate that extends beyond the display region. This extraction eliminates the thickness problem while maintaining the concealing function through the light shielding layer integrated into the polarizing plate.
Solution Approach 2:
The patent changes the material parameter from rigid decorative frame to flexible polarizing plate, and changes the functional parameter from external framing to integrated light shielding. The light shielding layer within the polarizing plate provides the concealing function without adding significant thickness to the overall display structure.
2Object-generated harmful factors
If a decorative frame is used to conceal metal interconnection layer, then the metal interconnection layer is hidden, but the appearance of the optical display becomes poor due to separate exposure
Solution Approach 1:
The patent merges the concealing function with the polarizing plate by integrating a light shielding layer directly into it. This unified structure eliminates the separate decorative frame and its associated appearance problems, creating a seamless integration between the functional polarizing element and the concealing function.
Solution Approach 2:
The polarizing plate serves multiple functions: it polarizes light for display functionality and simultaneously conceals the metal interconnection layer through its extended portion with light shielding layer. This multi-functionality eliminates the need for a separate decorative frame, improving overall appearance.
3Object-generated harmful factors
If the polarizing plate extends beyond the first substrate without securing member, then the metal interconnection layer can be concealed, but the polarizing plate suffers from deformation due to shrinkage or expansion under high temperature and humidity conditions
Solution Approach 1:
The patent applies preliminary anti-action by introducing a securing member that prevents the polarizing plate from deforming due to thermal expansion and humidity-induced shrinkage. This securing structure counteracts the natural tendency of the polarizing plate to deform under environmental stress, maintaining its extended configuration and concealing function.
4Ease of manufacture
If the TFT substrate extends beyond the color filter substrate to accommodate metal interconnection layer, then the metal interconnection layer can be disposed, but visibility differences between display region and non-display region increase
Solution Approach 1:
The patent applies local quality by extending the polarizing plate with light shielding layer specifically into the non-display region where the metal interconnection layer is located. This localized extension provides targeted light shielding in the non-display area, balancing the visibility between display and non-display regions while accommodating the extended TFT substrate 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 design effectively conceals the metal interconnection layers, reduces the optical display's thickness, maintains a good appearance, and prevents deformation of the polarizing plate, thereby enhancing the overall visibility and durability of the optical display.
Implementation Method 1
the first polarizing plate includes a light shielding layer therein to conceal at least a portion of the metal interconnection layer
Data Source
AI summary
An optical display includes a display region and a non-display region. The optical display includes: an optical display element comprising a first substrate and a second substrate facing the first substrate, the second substrate having a metal interconnection layer thereon; and a first polarizing plate on an upper surface of the optical display element, wherein each of the first polarizing plate and the second substrate extends beyond the first substrate, the first polarizing plate includes a light shielding layer therein to conceal at least a portion of the metal interconnection layer, and the optical display further includes a securing member at a region surrounded by the first polarizing plate, the first substrate, and the second substrate.