Cholesteric Liquid Crystal Polarizer for AR Display Visible Distance
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Solution Overview
Problem
Current head-mounted displays (HMDs) for augmented reality suffer from image distortion and transmittance deterioration due to the use of half-mirrors, which also reduce the visible distance of the user, complicating the structure and increasing weight.
Innovation Solution
An electronic device with a display module that includes a display panel emitting light in the gravity direction, a concave mirror positioned below the panel, and a polarizer with cholesteric liquid crystals, where the polarizer is angled at 45 degrees and has chamfering portions to enhance light transmission and reflection efficiency, minimizing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a half-mirror is used in the display module to enable see-through function, then the user can view both the display content and surrounding environment, but image distortion and transmittance deterioration occur
Solution Approach 1:
The patent changes the optical parameters by using a polarizer with specific polarization characteristics instead of a conventional half-mirror. The polarizer transmits light with a specific polarization state while blocking others, achieving see-through functionality with superior optical performance and reduced image distortion.
Solution Approach 2:
The patent employs a composite optical system combining a polarizer with specific liquid crystal materials to achieve both see-through capability and high image quality. The composite structure of the polarizer and its optical layers provides enhanced light transmission and reduced distortion compared to simple half-mirror designs.
2Length of stationary object
If a concave half-mirror is added to the display module to increase visible distance, then the visible distance is extended, but image distortion and transmittance deterioration worsen
Solution Approach 1:
The patent optimizes the optical path parameters by using a polarizer with specific angular orientation and optical properties. This changes the light transmission parameters to achieve extended visible distance without the image quality degradation associated with concave half-mirrors.
3Length of stationary object
If two half-mirrors are applied to the display module, then the visible distance is increased, but the structure becomes complicated and weight increases
Solution Approach 1:
The patent merges multiple optical functions into a single polarizer component, eliminating the need for separate half-mirrors. This consolidation achieves the same visible distance extension while significantly simplifying the overall structure and reducing weight.
Solution Approach 2:
The polarizer serves multiple functions simultaneously: it enables see-through capability, extends visible distance, and maintains image quality, replacing what would otherwise require multiple separate components including half-mirrors and additional optical elements.
4Length of stationary object
If two half-mirrors are applied to the display module, then the visible distance is increased, but weight increases
Solution Approach 1:
The patent combines the functions of multiple half-mirrors into a single polarizer assembly, dramatically reducing the total weight. The integrated design eliminates redundant structural support and mounting components that would be required for multiple separate mirrors.
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 solution increases the visible distance of the user by twice that of existing HMDs, improves light efficiency, and reduces image distortion, while simplifying the structure and reducing size and weight by using only one polarizer and concave mirror.
Implementation Method 1
the polarizer includes a cholesteric liquid crystal
Implementation Method 2
the polarizer includes a cholesteric liquid crystal
Implementation Method 3
a concave mirror positioned below the display panel
Implementation Method 4
a display panel disposed to emit light in a gravity direction
Data Source
AI summary
Disclosed is an electronic device. In the electronic device according to the present invention, a display panel disposed to emit light in a gravity direction, a concave mirror positioned below the display panel, and a polarizer positioned between the display panel and the concave mirror are used and the polarizer includes a cholesteric liquid crystal, thereby securing a visible distance and miniaturizing a size and a volume of the entire electronic device when a user wears the electronic device. The electronic device according to the present invention may be associated with an artificial intelligence module, a robot, an augmented reality (AR) device, a virtual reality (VR) device, a device related to a 5G service, and the like.