Reflective Layer Apertures for Mirror Display Balance
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Solution Overview
Problem
Mirror-type display devices face challenges in achieving a sufficient aperture ratio for display functionality while maintaining reflection properties across the visible light spectrum, making it difficult to effectively function as both a mirror and a display device simultaneously.
Innovation Solution
The implementation of a reflection layer with apertures that overlap the pixel electrode, allowing for adjustable aperture sizes to optimize both reflection and display properties, and the use of a wire grid pattern in the reflection layer to enhance light polarization and reduce the need for additional polarizers, thereby decreasing the device thickness and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the aperture ratio is increased to improve display quality, then the display property is improved, but the reflection property deteriorates
Solution Approach 1:
The patent applies local quality by implementing a non-uniform aperture distribution pattern where the size and density of apertures vary across different regions of the reflection layer. This allows different local areas to have optimized properties - some regions prioritize reflection while others prioritize display functionality, thereby resolving the contradiction between aperture ratio and reflection property at the global level.
2Ease of manufacture
If a uniform aperture distribution is used to simplify manufacturing, then the ease of manufacture is improved, but the display quality and reflection uniformity deteriorate
Solution Approach 1:
The patent segments the reflection layer into multiple zones with different aperture characteristics (size, shape, density). This segmentation allows each zone to be independently optimized for its specific function while maintaining a systematic manufacturing approach. The segmented design achieves high display quality and uniform reflection without requiring complex non-uniform manufacturing processes.
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 solution enables the mirror-type display device to achieve a balance between reflection and display properties, enhancing display quality and reflectivity while reducing thickness and manufacturing costs, making it suitable for applications like vehicle mirrors.
Implementation Method 1
a reflection layer having an aperture which entirely or partially overlaps a pixel electrode... reflecting light in a range of visible light
Implementation Method 2
the use of a wire grid pattern in the reflection layer to enhance light polarization
Data Source
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AI summary
A display device includes: a lower substrate; an upper substrate disposed opposite to the lower substrate; a liquid crystal layer between the lower substrate and the upper substrate; a plurality of gate lines (122) disposed on the lower substrate and elongated in a first direction (R1); a plurality of data lines (162) disposed on the lower substrate, insulated from the gate line (122) and elongated in a second direction (R2) which intersects the first direction; a thin film transistor (Q) connected to the gate line (122) and the data line (162); a pixel electrode (180) connected to the thin film transistor (Q); and a reflection layer (230) between the upper substrate and the liquid crystal layer. The reflection layer (230) has an aperture region (235) overlapping at least a portion of the pixel electrode (180).