Head-Mounted Display Light Pattern Self-Calibration
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Solution Overview
Problem
Existing head-mounted display (HMD) devices struggle to accurately adjust and position virtual content for users, particularly in augmented and virtual reality applications, as they lack effective methods to determine the precise positioning of light-receiving elements relative to the user's eyes, leading to suboptimal viewing experiences.
Innovation Solution
The integration of light-receiving elements on a head-mounted device that communicate with a display unit to emit a predetermined pattern, allowing the device to determine the positions of these elements and adjust the screen display areas accordingly, ensuring content is properly aligned for the user's view through the lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light-receiving elements are integrated on the head-mounted device to detect light from display pixels, then the positioning accuracy of virtual content relative to user's eyes is improved, but the device complexity increases due to additional sensors and calibration mechanisms
Solution Approach 1:
The system performs self-calibration by having the display unit emit light patterns that the light-receiving elements detect, allowing the device to automatically determine relative positions without external calibration tools or complex manual setup procedures
Solution Approach 2:
The light-receiving elements provide feedback signals to the controller based on detected light patterns, enabling the system to iteratively refine and accurately determine the positions of display elements relative to the user's eyes through continuous detection and adjustment
2Measurement precision
If the display unit emits light patterns for calibration purposes, then the positioning precision of content is improved, but the energy consumption increases due to additional display operations
Solution Approach 1:
The display unit emits light patterns periodically or on-demand rather than continuously, performing calibration operations at specific intervals or when triggered by user actions, thereby reducing overall energy consumption while still achieving accurate positioning
Solution Approach 2:
The system performs calibration operations in advance before actual content viewing, so that positioning data is established beforehand and does not require continuous energy-consuming calibration during content consumption
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 precise alignment of virtual content with real-world views, enhancing the user experience in augmented and virtual reality applications by ensuring accurate and comfortable viewing positions, thereby improving the overall usability and immersion of HMD devices.
Implementation Method 1
receive a signal that is transmitted from the wearable device in response to displaying the screen, wherein the signal includes information indicating light sensed by one or more light-receiving elements
Data Source
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AI summary
An electronic device comprising: a memory; a display unit; a communication unit; and at least one processor operatively coupled to the memory, the display unit, and the communication unit, configured to: output a light pattern by using one or more pixels that are part of the display unit; receive, via the communication unit, one or more signals that are transmitted by a wearable device in response to the light pattern; identify a screen display area corresponding to the wearable device based on respective positions of the one or more pixels and the one or more signals.