HMD Iris and Pupil Locus Login Mechanism
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Solution Overview
Problem
Conventional head-mounted displays face challenges in user identification due to the limitations of voice passwords, which can be affected by health conditions and background noise, and are vulnerable to unauthorized access.
Innovation Solution
A head-mounted display apparatus and login method utilizing an image capturing device, pico-projector, and application specific integrated circuit (ASIC) for iris recognition and pupil locus verification, where a first eye image is captured, and if it passes an iris recognition test, a locus image is projected, and multiple second eye images are captured to generate a pupil locus, which must comply with the locus image for a successful login request.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If voice password is used for user identification, then the head-mounted display can be operated without input devices, but the accuracy of user identification is degraded due to health conditions and background noise
Solution Approach 1:
The patent replaces the acoustic field-based voice password system with an optical field-based eye image capture system. The image capturing device uses optical sensors to detect eye images, and the ASIC processes these images to generate iris codes and pupil loci, substituting the mechanical/acoustic voice recognition mechanism with an optical/electronic vision-based system, thereby eliminating the effects of background noise and health conditions on identification accuracy
Solution Approach 2:
The patent introduces an intermediary processing layer between the image capturing device and the login decision. The ASIC acts as an intermediary that extracts iris codes and pupil loci from captured eye images, while the application processor uses these intermediaries (iris codes and pupil loci) to verify user identity. This intermediary processing enables accurate identification without direct human interaction, solving the accuracy problem while maintaining ease of operation
2Ease of operation
If voice password is used for user identification, then the system can be operated hands-free, but unauthorized persons can record and use the voice password to gain access
Solution Approach 1:
The patent creates a digital copy of the user's biological characteristics (eye iris pattern and pupil location) rather than relying on voice patterns. The ASIC extracts iris codes from captured eye images, creating a unique digital fingerprint that is extremely difficult to copy or replicate. This biological template copying approach provides both hands-free operation and strong security, as the iris pattern cannot be recorded or stolen like voice passwords
Solution Approach 2:
The patent extracts unique biological identification features (iris codes and pupil loci) from the captured eye images. By taking out and analyzing the distinctive iris patterns and pupil positions, the system creates a secure identification mechanism that cannot be easily copied. This extraction of unique biological markers provides both convenience and security, preventing unauthorized access while maintaining hands-free operation
3Measurement precision
If iris recognition and pupil locus verification are implemented, then user identification accuracy and security are enhanced, but the login process requires multiple image capturing and processing steps
Solution Approach 1:
The patent merges multiple identification features (iris code and pupil locus) into a unified verification process. The ASIC simultaneously extracts both the iris code and pupil locus from captured eye images, and the application processor combines these two verification elements into a single login decision. This merging of identification components provides high accuracy while streamlining the overall process complexity
Solution Approach 2:
The patent performs preliminary extraction and processing of iris codes and pupil loci during the image capture phase. The ASIC prepares these identification features in advance, and the application processor uses them for rapid verification. By performing the complex image processing and feature extraction as preliminary actions, the system achieves high identification accuracy without significantly increasing the perceived user complexity during actual login
Data Source
AI summary
Head-mounted display apparatus and login method thereof are provided. The head-mounted display apparatus includes an image capturing device, a pico-projector, an application specific integrated circuit (ASIC), and an application processor. The image capturing device captures a first eye image and a plurality of second eye images corresponding to a locus image. The ASIC determines whether the first eye image passes an iris recognition test. The application processor controls a pico-projector to project the locus image when the first eye image passes an iris recognition test, and generates a pupil locus based on the plurality of second eye images. The application processor determines whether the pupil locus is compliant with the locus image, and allows a login request if the pupil locus is compliant with the locus image.