Multi-Depth Display Frame Adjustment With Locking Actuator
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Solution Overview
Problem
Existing 3D image display technologies face challenges in achieving precise alignment between the display and optical systems for multi-depth expression, particularly in head-mounted displays used for virtual and augmented reality, leading to inefficiencies in power consumption and alignment adjustments.
Innovation Solution
A display apparatus with an actuator structure that includes a fixed and movable frame, elastic bridges, and a fixing member with variable length elements, utilizing shape memory alloys or electroactive polymers to adjust the distance between the image forming device and the optical system, allowing for precise control of depth expression while minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the actuator is continuously activated to maintain depth adjustment, then the alignment precision between display and optical system is improved, but power consumption increases
Solution Approach 1:
The actuator is activated only periodically when depth adjustment is needed, rather than continuously. The fixing member locks the position during stable states, and the actuator operates only when transitioning between depth levels, reducing power consumption while maintaining alignment precision.
Solution Approach 2:
The fixing member automatically maintains the adjusted position without requiring continuous actuator power. Once the actuator adjusts the distance between the display and optical system, the fixing member self-activates to lock this position, making the system self-sustaining during stable states.
2Adaptability or versatility
If the actuator structure is added for depth adjustment, then multi-depth expression capability is improved, but device complexity increases
Solution Approach 1:
The fixing member integrates multiple functions: it locks the adjustable position, maintains structural stability, and works cooperatively with the actuator. This merging of functions reduces the need for separate components, managing device complexity while enabling multi-depth expression.
Solution Approach 2:
The system transitions from a static fixed structure to a dynamic adjustable structure. The actuator enables the distance between the display and optical system to change dynamically, providing multi-depth expression capability while the fixing member ensures stable locking at each depth level.
3Manufacturing precision
If the variable length element is used for distance adjustment, then depth control precision is improved, but manufacturing complexity increases
Solution Approach 1:
The variable length element replaces traditional mechanical adjustment mechanisms (such as screws or linkages) with a more integrated solution. This substitution achieves precise depth control while potentially simplifying the manufacturing process by reducing the number of discrete mechanical parts requiring assembly.
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 enables precise multi-depth expression in 3D image displays, reducing power consumption by only activating the actuator when changing the depth of the image, thus maintaining power efficiency during stable depth states.
Implementation Method 1
The variable length element may include a shape memory alloy or an electroactive polymer, and the length of the variable length element may change based on an electrical control.
Implementation Method 2
The variable length element may include a shape memory alloy or an electroactive polymer, and the length of the variable length element may change based on an electrical control.
Implementation Method 3
The first elastic bridge may have elastic restoring force in a direction in which a radius of curvature of the first elastic bridge increases
Implementation Method 4
The second elastic bridge may have elastic restoring force in a direction in which a radius of curvature of the second elastic bridge increases
Implementation Method 5
The pair of side frames may include bimetal or piezoelectric elements which respectively bend or stretch based on a temperature control or an electrical control
Implementation Method 6
The pair of side frames may include bimetal or piezoelectric elements which respectively bend or stretch based on a temperature control or an electrical control
Data Source
AI summary
Provided is a display apparatus including an image forming device configured to form an image, an optical system configured to provide an output image by combining light containing an outside landscape with the image formed by the image forming device, and a driving device configured to adjust a distance between the image forming device and the optical system, wherein the driving device includes a fixed frame, a movable frame which faces the fixed frame and is movable, an actuator configured to change a distance between the fixed frame and the movable frame, and a fixing member configured to fix the distance between the fixed frame and the movable frame, wherein the image forming device is fixed to the movable frame.