Polarizing Reflector Layout for See-Through Display Light Leakage
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Solution Overview
Problem
Wearable electronic devices using see-through optics face issues with light leakage, leading to privacy invasion and reduced light efficiency, making it difficult to provide clear and bright augmented reality experiences.
Innovation Solution
Incorporation of a polarizing reflector system within the wearable electronic device to manage light leakage by using a light output module, display member, first and second polarization reflectors, and a polarization modulator to control light transmission and reflection, enhancing light efficiency and privacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If see-through optics are used in wearable electronic devices, then real-world visibility is maintained, but light leakage occurs causing privacy invasion and reduced light efficiency
Solution Approach 1:
The patent divides the optical system into multiple functional layers including a display member with first and second surfaces, a polarization reflector, and a polarization modulator. Each layer performs a specific function in managing light transmission and reflection, thereby resolving the contradiction between maintaining visibility and preventing light leakage.
Solution Approach 2:
The polarization reflector and polarization modulator act as intermediary elements between the light output module and the external environment. These intermediaries control the polarization state of light, enabling selective reflection of leakage light back to the user while allowing controlled transmission of display light, thus addressing both privacy and efficiency concerns.
2Object-generated harmful factors
If polarization reflectors and modulators are added to suppress light leakage, then privacy and light efficiency are improved, but device complexity increases
Solution Approach 1:
The patent combines the polarization reflector and polarization modulator into an integrated optical system with the display member. By merging these functional elements into a cohesive structure, the patent reduces the overall complexity compared to having separate, independent components while achieving effective light leakage suppression.
Solution Approach 2:
The display member serves multiple functions: it acts as both the display surface and the substrate for mounting the polarization reflector and modulator. This multi-functionality reduces the number of separate components needed, thereby managing device complexity while achieving the desired light control functionality.
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 polarizing reflector system effectively suppresses light leakage, ensuring clear and bright visual information is provided to the user while maintaining privacy, thus improving the device's light and power efficiency.
Implementation Method 1
a first polarization reflector disposed on the second surface and configured to reflect at least a portion of first leakage light
Implementation Method 2
a polarization modulator disposed on the first polarization reflector and configured to modulate at least a portion of a polarization component of second leakage light
Implementation Method 3
a second polarization reflector disposed on the polarization modulator and configured to reflect at least a portion of third leakage light
Data Source
AI summary
A wearable electronic device is provided. The wearable electronic device includes a light output module, a display member configured to output at least a portion of light emitted from the light output module to a first surface, and transmit light incident on a second surface opposite to the first surface, a first polarizing reflector disposed on the second surface and configured to reflect at least a portion of first leakage light, to the first surface, a polarization modulator disposed on the first polarizing reflector and configured to modulate and transmit at least a portion of a polarization component of second leakage light which has passed through the first polarizing reflector, and to transmit the modulated light and a second polarizing reflector disposed on the polarizing modulator and configured to reflect at least a portion of third leakage light, which is at least a portion of the second leaked light and has passed through the polarizing modulator, to the first surface.