Aerial Image Input Device for Secure Password Entry
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Solution Overview
Problem
Current password input devices lack adequate security measures to prevent unauthorized access and data fraud, as they can be compromised by camera installations or film overlays mimicking keyboards, and existing aerial image input devices do not provide sufficient protection for confidential information.
Innovation Solution
An input and output device that utilizes an aerial image as an input interface, featuring a display unit, an image formation mechanism, and a control unit to project an optical image in a three-dimensional space, ensuring only the user can interact with the input and output screen, and includes a destruction detection function to protect confidential information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a camera is installed on a peep prevention cover to monitor input, then security monitoring capability is improved, but password defraudation occurs through photographing the input screen
Solution Approach 1:
The patent transitions from a two-dimensional display surface to a three-dimensional aerial image space. The password input screen is projected into the air as a volumetric light field, making it invisible from side angles and photographable only from the front, thus preventing camera-based defraudation while maintaining security monitoring capability
Solution Approach 2:
The patent utilizes optical properties where the aerial image appears as a visible light formation from the user's perspective but becomes invisible or significantly dimmer from other angles. This angular-dependent visibility prevents unauthorized photographing while allowing monitoring cameras to verify proper display
2Loss of information
If a film with data acquisition function is stuck on a keyboard surface, then data acquisition capability is improved, but password defraudation occurs through the film
Solution Approach 1:
The patent replaces the mechanical contact-based keyboard input system with an optical aerial image interaction system. Users input passwords by interacting with the light-formed aerial image in three-dimensional space, eliminating the need for physical keyboard surfaces that could be compromised by adhesive films
Solution Approach 2:
The input interface moves from a two-dimensional keyboard plane to a three-dimensional aerial image space. This volumetric interaction method prevents film-based defraudation as there is no physical surface for adhesive films to attach to, while maintaining full data acquisition capability through optical sensing
3Ease of operation
If an aerial image is used as an input interface, then ease of operation is improved, but security protection for confidential information is insufficient
Solution Approach 1:
The patent applies different optical properties to different spatial regions of the aerial image. The image is optimized for high visibility and interaction from the user's specific viewing angle, while becoming invisible or significantly degraded from other angles, thus providing both ease of operation and security protection through spatially differentiated optical characteristics
Solution Approach 2:
The patent creates a three-dimensional light field for password input that maintains ease of interaction through natural hand movements in air, while the volumetric nature of the image prevents unauthorized photographing and provides angular-dependent visibility for security protection
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 device effectively prevents unauthorized access and data fraud by ensuring the input and output screen is only visible and interactable by the user, making it difficult to infer or photograph the input data, thereby enhancing the security and convenience of password input operations.
Implementation Method 1
an image formation mechanism that causes the image displayed on the display unit to be formed in air as an input and output screen by projecting the image on a three-dimensional space visible to a user
Implementation Method 2
the control unit displays the input and output screen as an optical image formation of light progressing in a direction of the user so that no one other than the user is able to photograph the input and output screen
Data Source
AI summary
A display unit is present in a space different from an input and output screen displayed in a three-dimensional space, and a control unit displays the input and output screen as an optical image formation of light progressing in a direction of a user so that no one other than the user is able to photograph the input and output screen.