Light Filtration Array for Low Power See-Through Display Notifications
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Solution Overview
Problem
Existing display technologies face challenges in efficiently managing power consumption and providing notifications in ambient light conditions, especially in see-through displays used in head-mounted devices, where ambient light interferes with the visibility of graphical elements and consumes significant power.
Innovation Solution
The implementation of a light filtration array that can transition between standard and low power modes, where the light projection display is terminated, and the light filtration array is actuated in a pattern to depict notifications, allowing for reduced power consumption and improved visibility of notifications without the need for active light projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the light projection display is activated to provide graphical elements on the see-through display, then the visibility and information display are improved, but the power consumption increases significantly
Solution Approach 1:
The display system is segmented into two distinct modes: standard display mode using light projection for full graphical information, and low power display mode using light filtration array for essential notifications only. This segmentation allows the system to switch between comprehensive information display and minimal power consumption states based on operational needs.
Solution Approach 2:
The system implements periodic switching between standard and low power display modes. The light projection display is activated only when full graphical information is needed, while the light filtration array provides periodic notification updates during low power mode, creating a rhythm of high and low power consumption that balances information needs with energy conservation.
2Illumination intensity
If the light filtration array is used to filter ambient light for better visibility, then the contrast and visibility of displayed elements are improved, but the device complexity increases
Solution Approach 1:
The light filtration array is merged with the existing see-through display structure, sharing common substrates and control electronics. By integrating the filtration functionality into the existing display architecture rather than adding separate components, the system achieves improved visibility while minimizing the increase in device complexity.
Solution Approach 2:
The light filtration array serves multiple functions: it filters ambient light to improve visibility of displayed elements, provides a low-power alternative display mechanism for notifications, and can be selectively activated in specific display regions. This multi-functionality reduces the need for separate components and simplifies the overall device architecture.
3Use of energy by moving object
If the light projection display is terminated in low power mode, then the power consumption is reduced, but the ability to display graphical elements is lost
Solution Approach 1:
The essential notification display functionality is extracted from the light projection system and implemented independently using the light filtration array. This extraction allows the critical function of providing user notifications to be maintained in low power mode without requiring the full graphical capabilities of the light projection display.
Solution Approach 2:
Instead of maintaining full graphical display capabilities across the entire display area in low power mode, the system applies local quality by activating only the necessary regions of the light filtration array for notification display. This localized approach provides sufficient information for user awareness while minimizing power consumption compared to full-screen graphical rendering.
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
This solution enables the see-through display to conserve power by disabling the light projection display in low power mode while still providing notification visibility through the light filtration array, enhancing user experience by maintaining notification awareness without excessive power usage.
Implementation Method 1
the light filtration array filters at least a portion of ambient light at the position on the see through display
Implementation Method 2
the light projection display projects the graphical element at the position on the see through display
Data Source
AI summary
A method including, in a standard display mode, causing display of a graphical element at a position on a see through display that includes a light projection display that overlays a light filtration array such that the light projection display projects the graphical element at the position on the see through display and the light filtration array filters ambient light at the position on the see through display, transitioning from the standard display mode to a low power display mode, causing termination of display of the graphical element on the see through display based on the low power display mode, determining that an event has occurred, generating a notification that signifies the event, and causing actuation of the light filtration array such that a plurality of light filtration cells of the light filtration array are selectively actuated in a pattern that depicts the notification is disclosed.