Multi-Mode Display Apparatus Using Wire Grid Polarizer and Liquid Crystal Layer
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Solution Overview
Problem
Existing multi-function display devices face challenges in seamlessly switching between transparent, mirror, and display modes, resulting in lower display quality compared to traditional displays.
Innovation Solution
A display apparatus incorporating a wire grid polarizer, an organic light emitting element, and a liquid crystal layer, which allows for switching between mirror, mirror-display, transparent-display, and transparent modes by controlling the phase of light using voltages applied to electrodes, and includes light blocking parts to enhance mirror functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-function display device is designed to switch between transparent, mirror, and display modes, then the versatility of the device is improved, but the display quality deteriorates compared to traditional displays
Solution Approach 1:
The display device is divided into distinct functional regions: a first region with a first polarizer for mirror mode, and a second region with a second polarizer for transparent mode. This segmentation allows each region to be optimized for its specific function while maintaining overall device versatility, resolving the contradiction between multi-functionality and display quality.
Solution Approach 2:
Different polarizing configurations are applied to different regions of the display. The first region uses a first polarizer optimized for mirror functionality, while the second region uses a second polarizer optimized for transparent display. This local differentiation enables high-quality performance in each mode without compromising the other.
2Adaptability or versatility
If switching between transparent and mirror functions is implemented in a multi-function display, then the adaptability is improved, but the ease of operation deteriorates due to difficulty in switching
Solution Approach 1:
The display device incorporates a liquid crystal layer that can dynamically change its optical properties in response to applied voltages. This dynamic control allows seamless switching between mirror and transparent modes by simply adjusting the voltage state of the liquid crystal layer, making operation easy while maintaining multi-functionality.
Solution Approach 2:
The switching between modes is achieved by changing the voltage parameter applied to the liquid crystal layer. When voltage is applied, the liquid crystal molecules reorient to enable transparent mode; when voltage is removed, they return to their original state for mirror mode. This simple parameter change provides easy operation while maintaining adaptability.
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
Enables efficient switching between modes while maintaining high display quality, allowing the device to function as a mirror, transparent glass, or display screen depending on the operational state of the organic light emitting element and liquid crystal layer.
Implementation Method 1
the first polarizer may be a wire grid polarizer
Implementation Method 2
phase of light which passes the liquid crystal layer may be maintained or retarded by 45 degree according to voltages applied to the first and second electrodes
Implementation Method 3
The OLED emits the light of in accordance with an organic material included therein
Implementation Method 4
The first light blocking part may reflect light
Data Source
AI summary
A display apparatus includes a first polarizer, a second polarizer facing the first polarizer, an organic light emitting element overlapping the first polarizer and the second polarizer, a first electrode and a second electrode between the first polarizer and the second polarizer and facing each other, and a liquid crystal layer between the first electrode and the second electrode.