Electro-optical reflection system for ambient light interference
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Solution Overview
Problem
Electronic mirrors with electrochromic semitransparent mirrors face high power costs due to the interference of ambient light reflection with display visibility, requiring high luminance levels to adequately view displays.
Innovation Solution
An electro-optical system comprising a voltage supply device, an active polarizing layer, a retarding layer, and a reflective layer, where the active polarizing layer switches between polarized and non-polarized states to control light reflection and transmission, allowing the system to function as both a reflective mirror and a visual display, with the retarding layer altering polarization states to optimize reflectivity and transmissivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If electrochromic elements with semitransparent mirror are used to view display, then display can be viewed on the mirror, but reflection of ambient light significantly interferes with display visibility requiring extremely high luminance values
Solution Approach 1:
The patent applies parameter changes by using an active polarizing layer that changes its optical properties (from non-polarized to polarized state) in response to voltage changes. This allows the system to dynamically adjust the polarization state to block ambient light reflection while maintaining display visibility, thereby reducing the luminance requirements compared to conventional semitransparent mirror systems.
Solution Approach 2:
The patent employs a composite structure combining multiple functional layers: active polarizing layer, retarding layer, and semitransparent mirror layer. This composite material approach enables simultaneous optimization of display transmission and ambient light reflection reduction, as each layer contributes specific optical properties that work together to solve the interference problem.
2Illumination intensity
If high luminance values are used to adequately view display, then display visibility is improved, but power consumption increases unduly
Solution Approach 1:
By changing the polarization state parameter of the active polarizing layer through voltage control, the system can block ambient light reflection without increasing display luminance. This parameter change enables the display to be viewed at lower luminance levels, thereby reducing power consumption while maintaining adequate visibility.
3Adaptability or versatility
If active polarizing layer switches between polarized and non-polarized states, then control of light reflection and transmission is achieved, but device complexity increases
Solution Approach 1:
The active polarizing layer serves multiple functions: it acts as a switchable optical element that can be in either non-polarized or polarized state, enabling both mirror mode and display mode operations. This multi-functionality reduces the need for separate components, thereby managing device complexity while achieving versatile light control.
Solution Approach 2:
The system employs dynamic control where the active polarizing layer can switch between states in response to voltage changes. This dynamic capability allows the same structure to adapt to different operational modes (mirror or display) without requiring physically reconfigurable components, balancing adaptability with structural simplicity.
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 system achieves high transmissivity of display light while reducing ambient light reflection, significantly lowering power costs and improving display visibility with minimal reflectance of ambient light, outperforming existing systems in terms of transmissivity and reflectivity rates.
Implementation Method 1
The active polarizing layer is configured to switch back and forth between a non-polarized state and a polarized state as the voltage supply device supplies varying levels of voltage
Implementation Method 2
The retarding layer is configured to alter the polarization state of light traveling through it
Implementation Method 3
The reflective layer includes an organic light emitting diode display
Data Source
AI summary
An electro-optical system includes a voltage supply device, an active polarizing layer, a retarding layer, and a reflective layer. The active polarizing layer is electrically coupled to the voltage supply device. The active polarizing layer is configured to switch back and forth between a non-polarized state and a polarized state as the voltage supply device supplies varying levels of voltage. The retarding layer is configured to alter the polarization state of light traveling through it. The reflective layer is positioned adjacent to the retarding layer.