Jig Receiver Guides for HMD Optical Alignment
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Solution Overview
Problem
In the manufacturing process of head-mounted displays (HMDs), the positional accuracy between optical components is not adequately considered, leading to potential changes in the spatial position of generated images due to improper alignment of the frame on a jig.
Innovation Solution
A wearable display system with a jig receiver that includes guides to accurately position and orient the casing and optical sections, ensuring precise alignment and attachment of optical components, thereby improving the positional accuracy of the assembled image generation system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the frame is not placed in a desired attitude with respect to the jig during manufacturing, then the manufacturing process is simpler and faster, but the positional accuracy between optical components deteriorates
Solution Approach 1:
The patent introduces a jig receiver as an intermediary component that mediates between the frame and the jig. The jig receiver includes multiple guides (first guide, second guide, third guide) that act as intermediaries to transfer and constrain the positional relationship, ensuring accurate placement of the frame on the jig during manufacturing.
Solution Approach 2:
The positioning function is segmented into multiple independent guides within the jig receiver. Each guide (first guide for X-axis, second guide for Y-axis, third guide for Z-axis) handles a specific directional constraint, dividing the complex positioning task into manageable segments that can be independently designed and adjusted.
2Manufacturing precision
If multiple guides are spaced apart in multiple directions, then the positional accuracy and orientation control improve, but the device complexity increases
Solution Approach 1:
Each guide in the jig receiver is designed with specific local qualities tailored to its function. The first guide is configured for X-axis constraints, the second guide for Y-axis constraints, and the third guide for Z-axis constraints. Each guide has specific spacing relationships with others to optimize its local positioning function while contributing to the overall orientation accuracy.
3Stability of the object's composition
If the spatial position of image changes due to frame shape change, then the frame becomes more adaptable to different conditions, but the image position stability deteriorates
Solution Approach 1:
The jig receiver with its multiple guides performs preliminary positioning action during manufacturing. By constraining the frame's position and orientation early in the manufacturing process through the guide system, the image generation components are pre-positioned accurately, ensuring image position stability is established before the product is released for use.
Data Source
AI summary
A wearable display includes a first optical section, a main body, and a jig receiver. The first optical section emits light. The main body includes a second optical section that is connected to the first optical section and outwardly emits the light as image light, and a casing that supports the second optical section. The jig receiver includes a first guide that supports a first protrusion of a jig, a second guide that supports a second protrusion of the jig, and a third guide that supports a third protrusion of the jig. The jig receiver is provided in the casing such that at least two of the first, second, and third guides are spaced apart from each other in the first axis direction and at least two of the first, second, and third guides are spaced apart from each other in the third axis direction.