Immersive Display Optics With Polarization Noise-Light Blocking
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Solution Overview
Problem
Existing 3D image display devices struggle to effectively reduce the impact of ambient illuminance on the immersive experience by blocking noise light from surrounding environments.
Innovation Solution
A display device incorporating a concave mirror, beam splitter, polarization control optical element, and anti-reflection film is designed to focus image light and block noise light, with specific angles and configurations to enhance the immersive experience by minimizing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional display device is used, then the structure is simple, but ambient light interferes with the immersive experience
Solution Approach 1:
The optical system is segmented into multiple functional components: a polarizer to control light polarization, a quarter-wave plate to convert linear polarization to circular polarization, a beam splitter to separate light paths, and a concave mirror to focus and redirect light. Each component addresses specific aspects of ambient light rejection and image delivery, collectively solving the contradiction between simplicity and effectiveness.
Solution Approach 2:
The patent introduces several intermediary optical elements between the display panel and the user's eye. The polarizer and quarter-wave plate act as intermediaries to manipulate light properties, while the beam splitter and concave mirror serve as intermediaries to control light paths. These intermediaries enable the system to reject ambient light effectively without requiring a completely redesigned display structure.
2Object-affected harmful factors
If a polarizer is added to block noise light, then ambient light rejection improves, but reflection and loss of image light increases
Solution Approach 1:
The patent changes the polarization state of light using a quarter-wave plate that converts linearly polarized light from the polarizer into circularly polarized light. This parameter change in polarization state allows the light to pass through subsequent optical elements (beam splitter and concave mirror) with minimal reflection loss, thereby reducing energy loss while maintaining noise light blocking capability.
Solution Approach 2:
The optical system employs a composite arrangement of different optical materials and components: polarizing film, quarter-wave plate material, beam splitter material, and concave mirror coating. Each material is selected for its specific optical properties to minimize reflections and maximize light transmission, collectively reducing energy loss while maintaining effective noise light rejection.
3Adaptability or versatility
If the display device is worn as glasses or head mount, then immersive experience is enhanced, but surrounding environment still affects image quality
Solution Approach 1:
The patent converts the harmful effect of ambient light into a beneficial filtering mechanism. By using a polarizer followed by a quarter-wave plate, the system creates a polarization state that is sensitive to the orientation of ambient light. This allows the device to reject polarized ambient light (such as from screens or reflections) while transmitting the circularly polarized image light, effectively turning environmental light interference into a selective filtering advantage.
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 device effectively blocks noise light, enhancing the immersive experience by reducing ambient light interference and maintaining clear image visibility.
Implementation Method 1
a concave mirror configured to focus the image light
Implementation Method 2
a concave mirror configured to focus the image light
Implementation Method 3
a polarization control optical element including at least one quarter wave plate and a polarizer configured to transmit the image light
Implementation Method 4
a beam splitter disposed obliquely with respect to a traveling path of the image light
Implementation Method 5
an anti-reflection film disposed between the polarizer and the field of view and configured to block noise light reflected from the polarizer
Data Source
AI summary
A display device may include a display panel configured to provide image light; a concave mirror configured to focus the image light, a beam splitter disposed obliquely with respect to a traveling path of the image light, a polarization control optical element including at least one quarter wave plate and a polarizer configured to transmit the image light to a field of view through the concave mirror and the beam splitter, and an anti-reflection film disposed between the polarizer and the field of view and configured to block noise light reflected from the polarizer from the field of view on an opposite side of the display panel. A thickness of the anti-reflection film decreases away from a central portion of the anti-reflection film.