Chiral Liquid Crystal Display Panel Anti-Reflection Design
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Solution Overview
Problem
Existing display panels face challenges in reducing reflection of external light, which affects visibility and display efficiency, and there is a need to improve light extraction efficiency without increasing power consumption.
Innovation Solution
A display panel design incorporating a driving backplane, a light emitting layer with chiral liquid crystal and circularly polarization layers, where the chiral liquid crystal layer transmits circularly polarized light of one handedness and reflects the opposite handedness, and the circularly polarization layer converts light into circularly polarized and linearly polarized light to reduce reflection and enhance light extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If circularly polarization plates are added to reduce external light reflection, then visibility is improved, but device complexity increases
Solution Approach 1:
The patent combines the circularly polarizing plate and the chiral liquid crystal layer into a single integrated structure. The circularly polarizing plate is positioned adjacent to the chiral liquid crystal layer, allowing them to work together as a unified anti-reflection system rather than separate components, thereby reducing overall device complexity while maintaining the anti-reflection function.
Solution Approach 2:
The patent uses a composite structure combining circularly polarizing materials and chiral liquid crystal materials. This composite approach allows the system to achieve enhanced anti-reflection performance through the synergistic interaction between the two materials, while the integrated design keeps the overall structure manageable.
2Productivity
If chiral liquid crystal layer is added to extract more light, then light extraction efficiency is improved, but device complexity increases
Solution Approach 1:
The chiral liquid crystal layer is merged with the circularly polarizing plate to form an integrated light management system. This combination allows the chiral liquid crystal to enhance light extraction through its helical structure while sharing the same physical space and functional architecture as the polarizing plate, avoiding the need for completely separate components.
Solution Approach 2:
The chiral liquid crystal layer serves multiple functions: it acts as a light extraction enhancement layer, works with the circularly polarizing plate to reduce reflection, and can potentially provide additional optical control functions. This multi-functionality justifies its inclusion without proportionally increasing complexity.
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 reduces ambient light reflection and improves light extraction efficiency, enhancing the display effect while maintaining low power consumption.
Implementation Method 1
the chiral liquid crystal layer is configured to transmit circularly polarized light of the first color in a first handedness and reflect circularly polarized light of the first color in a second handedness
Implementation Method 2
the circularly polarization layer is configured to convert light incident from a side of the circularly polarization layer away from the driving backplane into the circularly polarized light in the first handedness, and convert light incident from a side of the circularly polarization layer close to the light emitting devices into linearly polarized light
Data Source
AI summary
The present disclosure provides a display device, including: a driving backplane; a light emitting layer, disposed on a side of the driving backplane, and including a plurality of light emitting devices that include a first light emitting device emitting light of a first color; a chiral liquid crystal layer, disposed on a side of the light emitting layer away from the driving backplane, and configured to transmit circularly polarized light of the first color in a first handedness and reflect circularly polarized light of the first color in a second handedness; and a circularly polarization layer, disposed on a side of the chiral liquid crystal layer away from the driving backplane, and configured to convert light incident from a side of the circularly polarization layer away from the driving backplane into the circularly polarized light in the first handedness.