Optical Device Lens Array Condenses Light for AR Field of View
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current augmented reality systems using head-mounted displays require multiple micro displays to expand the field of view, leading to complexity and reduced luminance, as well as issues with synchronization and color filtering in organic light emitting diodes.
Innovation Solution
An optical device with a lens and a condenser lens array that condenses light from subpixels onto a single reflector, allowing for a wider field of view without the need for multiple displays, and utilizing a flexible display device that surrounds the lens to enhance luminance and reduce the complexity of synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple micro displays are used to expand the field of view, then the visible area increases, but the device complexity and synchronization difficulty increase
Solution Approach 1:
The invention divides the single display device into multiple independent display regions (first display region, second display region, third display region, fourth display region) that can be controlled separately. Each region corresponds to a specific angular range, allowing the system to expand the field of view by activating different segments rather than using multiple complete display devices. This segmentation reduces synchronization complexity while maintaining expanded visibility.
Solution Approach 2:
The invention utilizes the angular dimension by directing light from different display regions at different angles through the lens array. The first display region emits light at a first angle, the second at a second angle, and so on, creating an expanded field of view in the angular dimension rather than requiring additional display devices in spatial dimensions.
2Area of stationary object
If multiple micro displays are used to expand the field of view, then the visible area increases, but the luminance decreases
Solution Approach 1:
The invention merges the light output from multiple display regions into a unified optical path through the lens array. By combining the light from the first, second, third, and fourth display regions through the same lens system, the luminance is maintained or enhanced rather than diluted, as the light paths are consolidated rather than distributed across separate optical systems.
Solution Approach 2:
The display device is configured to emit light at specific predetermined angles corresponding to different angular ranges before the light reaches the lens array. This preliminary angular separation allows the lens array to efficiently direct each light stream to its appropriate viewing zone, maintaining luminance intensity while achieving expanded field of view coverage.
3Ease of manufacture
If organic light emitting diodes are used, then the display can be implemented, but synchronization and color filtering issues arise
Solution Approach 1:
The invention applies different characteristics to different regions of the display device. Each display region (first, second, third, fourth) is optimized for its specific angular range and can be independently controlled. This local quality approach allows each region to operate autonomously, reducing synchronization requirements and eliminating the need for complex color filtering across the entire display, as each region can be tailored to its specific function.
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 optical device effectively increases the field of view while minimizing interference with real images and achieving high luminance without the need for multiple displays, reducing the complexity of driving multiple display devices and eliminating the requirement for color filters.
Implementation Method 1
a lens array between the lens and the display device and including a plurality of lenses configured to condense light from the subpixels onto the first reflector
Implementation Method 2
The first reflector may be configured to reflect an image displayed on the display device to a first surface of the lens
Data Source
AI summary
An optical device includes: a lens including a first reflector; a display device at a first side surface of the lens and including a plurality of subpixels; and a lens array between the lens and the display device and including a plurality of lenses configured to condense light from the subpixels onto the first reflector.