Low-Reflection Frame Edge for Liquid Crystal Display
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Solution Overview
Problem
In projection displays, the frame member on the light emission side of the liquid crystal panel causes reflection issues, leading to degradation in image quality due to edge and circuit reflections.
Innovation Solution
A liquid crystal display and projection display design where the edge portion of the frame member is formed of a low-reflection material with a reflectance of less than 1.5% to green light, and/or features a slope facing the light emission surface, reducing light reflection and improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a frame member is provided on the light emission side of the liquid crystal panel to support and install the panel, then the structural stability and installation capability are improved, but light reflection from the frame member causes image quality degradation
Solution Approach 1:
The frame member is designed with different surface properties in different regions: the edge portion facing the liquid crystal panel has a low-reflection surface with specific reflectance characteristics, while other portions may have different properties. This local differentiation allows the frame to maintain structural function while minimizing light reflection in the critical viewing area.
Solution Approach 2:
The low-reflection surface is configured to have specific reflectance characteristics across different wavelength ranges, particularly controlling reflection in the visible spectrum where image quality is most affected. The surface may exhibit wavelength-dependent reflection properties that minimize harmful reflections while maintaining other functional requirements.
2Object-generated harmful factors
If the edge portion of the frame member is formed with a low-reflection surface to reduce light reflection, then image quality is improved, but manufacturing complexity increases
Solution Approach 1:
The low-reflection surface is achieved by controlling specific parameters of the frame member, such as surface roughness, thickness, and material composition. By optimizing these parameters within certain ranges, the frame member can exhibit low reflection properties without requiring complex additional structures or multi-step manufacturing processes.
Solution Approach 2:
The frame member may be constructed using composite materials or material combinations that inherently provide low-reflection properties. This allows the desired optical characteristics to be achieved through material selection rather than complex surface treatments or additional manufacturing steps.
3Device complexity
If the frame member structure is simplified to reduce device complexity, then manufacturing ease is improved, but the ability to control light reflection and maintain image quality deteriorates
Solution Approach 1:
The frame member is designed to serve multiple functions simultaneously: providing structural support, enabling installation, and controlling light reflection. By integrating the low-reflection surface directly into the frame member itself rather than adding separate components, the design achieves multiple objectives without increasing overall device 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
The use of low-reflection materials and angled frame edges minimizes light reflection, effectively suppressing image quality degradation caused by the frame member, allowing for better image clarity and design flexibility.
Implementation Method 1
An edge portion of the opening of the frame member is formed of a low-reflection material having a reflectance of less than about 1.5% to green light
Data Source
AI summary
A liquid crystal display includes: a liquid crystal panel containing an effective pixel region that is configured to emit light corresponding to an image; and a frame member provided on a light emission side of the liquid crystal panel, and having an opening opposed to the effective pixel region of the liquid crystal panel. An edge portion of the opening of the frame member is formed of a low-reflection material having a reflectance of less than about 1.5% to green light.