Motorized LED Array for XR Display FOV
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Solution Overview
Problem
Existing XR display systems have limited Field of View (FOV), are expensive, and consume high energy, making them unsuitable for widespread adoption in augmented and virtual reality applications.
Innovation Solution
The development of an XR display system utilizing a Light Emitting Diode (LED) near-eye display element with a motorized LED array that provides a larger FOV, is less expensive to produce, and consumes less energy, featuring an LED array and motors that are synchronized to display XR experiences with a wireless communication protocol and inductive power coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If waveguide-based XR display systems are used, then a compact form factor is achieved, but the Field of View is limited and production costs are high
Solution Approach 1:
The patent replaces complex optical waveguide systems with a motorized LED array mechanism. The LED array is mounted on a rotating platform driven by a motor, eliminating the need for expensive waveguide optics while achieving a larger field of view through mechanical rotation and sweeping motion of the display elements across the user's visual field.
Solution Approach 2:
The system employs dynamic rotation and sweeping motion of the LED array to expand the effective field of view. By rotating the LED array on a motorized platform and sweeping it across different angular positions, the system creates a larger perceived display area without requiring a physically larger static structure, thus maintaining compact form factor while improving FOV.
2Use of energy by moving object
If waveguide-based XR display systems are used, then a compact form factor is achieved, but energy consumption is high
Solution Approach 1:
The motorized LED array operates using periodic rotation and sweeping motions rather than continuous operation. The system rotates the LED array to desired positions and maintains display output only when needed, rather than requiring continuous optical path illumination as in waveguide systems. This periodic action reduces overall energy consumption while achieving the same visual output.
Solution Approach 2:
The patent substitutes energy-intensive optical waveguide illumination with a motorized mechanical system. The motor driving the LED array consumes less energy than the continuous optical pumping required by waveguide systems, particularly because the motor only operates intermittently to reposition the display rather than maintaining constant optical illumination across the entire field of view.
3Ease of manufacture
If a motorized LED array is used, then production cost is reduced, but device complexity increases
Solution Approach 1:
The system segments the display function into a modular motorized LED array assembly that can be independently manufactured and tested. The LED array, motor, and mounting structure are designed as separate modules that can be produced using standard manufacturing techniques and then assembled, reducing overall production complexity compared to integrated waveguide systems that require specialized optical fabrication processes.
Solution Approach 2:
The patent employs inexpensive LED components and standard motor units that can be easily replaced if needed, rather than expensive waveguide optics that require complex alignment and are difficult to replace. The use of commodity LED arrays and off-the-shelf motor components significantly reduces production costs and simplifies the supply chain, even though it introduces moving mechanical parts.
4Area of stationary object
If a motorized LED array is used, then Field of View is increased, but reliability may be reduced due to moving parts
Solution Approach 1:
The system uses a motorized platform that provides more motion capability than strictly necessary for basic display function. The LED array can be positioned at multiple angular locations and swept across extended ranges, creating a larger effective field of view. This excessive motion capability allows the system to achieve superior FOV performance while the motor and control system are designed to handle the additional degrees of freedom reliably through precision encoding and feedback control.
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 offers a larger Field of View, reduced production costs, and lower energy consumption, enhancing user interaction and immersion in XR environments while improving system efficiency and affordability.
Implementation Method 1
An LED array is synchronized to display the XR experience in the circular swept area
Implementation Method 2
A motor is operable to rotate the LED array about a center of the circular swept area
Data Source
AI summary
An eXtended Reality (XR) display system includes a Light Emitting Diode (LED) display controller, and a Light Emitting Diode (LED) near-eye display element operatively coupled to the LED display driver. The LED near-eye display element includes one or more motors and an LED array operably connected to the one or more motors. During operation, the LED display driver receives video data including a rendered virtual object of an XR experience and generates LED array control signals based on the video data, the LED array control signals causing one or more LEDs of the LED array to be energized in a sequence. The LED display driver also generates synchronized motor control signals and simultaneously communicates the LED array control signals to the LED array and the synchronized motor control signals to the one or more motors causing the LED near-eye display element to display the rendered virtual object.