Light Pattern Recognition Module for Thin Laptop Authentication
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Solution Overview
Problem
Existing portable computing devices face challenges in implementing compact and accurate user authentication systems due to limited internal space, necessitating a compact yet effective biometric authentication method.
Innovation Solution
A light pattern recognition module that emits a predetermined light pattern and detects the reflected pattern for user authentication, utilizing a light projector and detector integrated within the device's display assembly, allowing for facial recognition and gesture capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a biometric authentication system is implemented in portable computing devices, then user security and authentication accuracy are improved, but device thickness and internal space are consumed
Solution Approach 1:
The patent combines the light projector, light detector, and display layer into an integrated display assembly structure. The light projector and detector are positioned adjacent to the display layer, allowing them to share the same structural space and work together for facial recognition authentication without requiring separate dedicated spaces for each component.
Solution Approach 2:
The light projector and light detector are nested within the display assembly structure, with components arranged in a compact configuration where the light projector emits light through the display layer and the detector captures reflected light patterns. This nested arrangement enables the authentication system to function within the existing display thickness.
2Reliability
If authentication functions are added to portable computing devices, then user security is improved, but device complexity increases
Solution Approach 1:
The display layer serves multiple functions: it acts as both the display interface for users and the transmission medium for light patterns used in facial recognition. The light projector and detector are integrated into the display assembly, allowing the same structural components to serve both display and authentication purposes, thereby reducing overall system complexity.
Solution Approach 2:
The system uses the display layer's own optical properties to facilitate authentication. The light projector emits light through the display layer, and the display layer's transparency allows the light to reach the user's face and reflect back to the detector, eliminating the need for separate optical pathways or additional complex components.
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
Enables secure and accurate user authentication while maintaining a thin profile, suitable for various computing devices, and can be used for additional functions like data encryption and password supplementation.
Implementation Method 1
a light pattern projector that projects a light pattern directly through the display layer
Implementation Method 2
subsequently detecting a pattern of light that is reflected by the user for authenticating the user
Data Source
AI summary
This application relates to a laptop computer. The laptop computer includes a base portion pivotally coupled to a lid portion is described. The laptop computer includes a display assembly carried by the lid portion, where the display assembly includes a light-transmissive cover, a display layer overlaid by the light-transmissive cover, a display stack electrically coupled to and overlaid by the display layer, and a light pattern recognition module adjacent to the display stack and overlaid by the display layer. The light pattern recognition module includes (i) a light pattern projector that projects a light pattern directly through the display layer.