Circular Polarizer Display Device Suppressing External Light Interference
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Solution Overview
Problem
Display devices face challenges in suppressing interference due to external light, which affects their performance and image quality, particularly in terms of external light reflectance.
Innovation Solution
A display device configuration that includes a first substrate with a transflective layer, a wavelength conversion layer, a capping layer, a first polarizing layer, and a second polarizing layer with different polarization directions, along with a light blocking filter and a black matrix, is employed to reduce external light reflectance and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional LCD structure without circular polarizer is used, then the device structure is simpler, but external light interference and reflectance are not suppressed
Solution Approach 1:
A circular polarizer is introduced as an intermediary component between the liquid crystal layer and the viewer. This circular polarizer works in conjunction with the linear polarizer to create a polarization filtering system that selectively blocks external light while maintaining display functionality, thereby suppressing external light interference without fundamentally redesigning the entire display structure
Solution Approach 2:
The patent employs a composite polarizing system combining both linear and circular polarizers. This composite approach leverages the properties of both polarizer types to achieve enhanced external light rejection while maintaining the necessary display characteristics, resolving the contradiction between interference suppression and structural simplicity
2Object-affected harmful factors
If a transflective layer is added to reduce external light reflectance, then external light interference is suppressed, but the manufacturing process becomes more complex
Solution Approach 1:
The transflective layer is merged with the existing polarizing layer structure, combining multiple functions (polarization filtering and external light reflection control) into an integrated assembly. This merging approach reduces the number of separate manufacturing steps while achieving the dual benefit of interference suppression and reflectance reduction
Solution Approach 2:
The transflective layer serves multiple functions simultaneously: it acts as a protective barrier, controls external light reflectance, and works in conjunction with the polarizers to suppress interference. This multi-functionality reduces the need for additional separate components, thereby simplifying the overall manufacturing process despite the added complexity of the layer itself
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 effectively suppresses external light interference, enhancing the display device's performance by lowering external light reflectance and improving image quality.
Implementation Method 1
a first polarizing layer disposed on the capping layer, and a second polarizing layer disposed on the other surface of the first substrate. The first polarizing layer and the second polarizing layer have different polarization directions.
Implementation Method 2
a transflective layer disposed on a surface of the first substrate
Implementation Method 3
a wavelength conversion layer disposed on the transflective layer
Data Source
AI summary
A display device including: a first substrate; a transflective layer disposed on a surface of the first substrate; a wavelength conversion layer disposed on the transflective layer; a capping layer disposed on the wavelength conversion layer, a first polarizing layer disposed on the capping layer; and a second polarizing layer disposed on the other surface of the first substrate. The first polarizing layer and the second polarizing layer have different polarization directions.