AR Glasses Laser Scanning Display Volume Reduction
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Solution Overview
Problem
Existing augmented reality (AR) display assemblies are bulky due to the use of multiple optical lenses for light transmission and reflection, making them inconvenient for users to wear as AR glasses or helmets.
Innovation Solution
A laser beam scanning display device comprising a focusing lens, a laser emitter, a beam combiner, a micro-electromechanical assembly, and a projection lens, which emits trichromatic laser signals that are converged and scanned to generate content for display on AR glasses lenses, eliminating the need for bulky light reflecting or transmitting means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple optical lenses are used for light transmission and reflection in AR display assembly, then the display function is achieved, but the volume of the display device increases
Solution Approach 1:
The patent extracts and removes the bulky light transmitting means and light reflecting means from the AR display assembly. Instead of using multiple optical lenses for transmission and reflection, the invention uses a laser emitter with beam combining and scanning mechanisms, eliminating the need for traditional optical lens systems while maintaining display functionality.
Solution Approach 2:
The patent replaces the mechanical optical lens system with a laser-based scanning system. The laser emitter generates laser beams that are combined and scanned by a micro-electromechanical assembly (MEMS) to display images directly on the AR glasses lenses, substituting the complex mechanical optical path with a more compact laser scanning approach.
2Volume of stationary object
If a compact display device is used to reduce volume, then wearability is improved, but the display function may be compromised
Solution Approach 1:
The patent employs a dynamic laser scanning system using a micro-electromechanical assembly (MEMS) that can rapidly adjust the direction of laser beams. This dynamic scanning mechanism allows the compact device to generate complete images by scanning laser lines across the display area, maintaining full display functionality despite the reduced volume.
Solution Approach 2:
The patent changes the fundamental operating parameters of the display system by using laser beams with specific wavelengths (trichromatic laser signals) and controlling their intensity and scanning patterns. This allows the compact device to achieve high-quality color display and image formation through precise control of laser parameters rather than relying on large optical components.
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 significantly reduces the volume of the display device, allowing for more compact AR apparatus that can be comfortably worn, while ensuring safe operation by monitoring laser signal power and adjusting scanning parameters for effective content display.
Implementation Method 1
a convergent laser signal obtained by converging the trichromatic laser signals using the focusing lens
Implementation Method 2
the beam combiner is configured to reflect to the micro-electromechanical assembly a convergent laser signal
Implementation Method 3
the laser emitter is configured to emit trichromatic laser signals
Data Source
AI summary
The present disclosure provide a laser beam scanning display device and augmented reality (AR) glasses, comprising a focusing lens, a laser emitter located at a focal point of the focusing lens, a beam combiner, a micro-electromechanical assembly and a projection lens. The laser emitter emits trichromatic laser signals, which are irradiated into the beam combiner via the focusing lens. The beam combiner converges the trichromatic laser signals into a convergent laser signal and emits it to the micro-electromechanical assembly. The micro-electromechanical assembly scans the received convergent laser signal to generate a content to be displayed. In the above laser beam scanning display device, the content to be displayed, which is generated by the micro-electromechanical assembly, is displayed on the screen via the projection lens, which dispenses with any laser signal reflecting or transmitting means, thus reducing the volume of the device.