Viewfinder Display Control for Line-of-Sight Calibration with Glasses
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Solution Overview
Problem
Users wearing glasses have difficulty checking the entirety of the effective display region in the viewfinder during line-of-sight calibration, leading to inaccurate calibration data and detection due to changes in the positional relationship between the line-of-sight detector and the eye.
Innovation Solution
A display control apparatus that allows users to visually check an effective display region by adjusting its size, with options for displaying the region in a first size or a second size smaller than the first, ensuring accurate calibration data acquisition regardless of glasses wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the effective display region is displayed in a large size to ensure visibility, then the visibility is improved, but users wearing glasses cannot check the entirety of the effective display region
Solution Approach 1:
The patent applies dynamics by making the display size changeable based on user needs. The control unit switches between a first display setting (larger size) and a second display setting (smaller size), allowing the system to adapt dynamically to different user conditions, particularly whether the user is wearing glasses or not.
Solution Approach 2:
The patent changes the display parameter (size) to resolve the contradiction. By adjusting the display size between two predetermined settings, the system can optimize visibility for users without glasses while ensuring compatibility for users wearing glasses, thus resolving the technical contradiction through parameter modification.
2Area of stationary object
If the user changes the viewing direction to check regions not visible when wearing glasses, then the visible area is improved, but the positional relationship between the line-of-sight detector and the eye changes leading to inaccurate calibration
Solution Approach 1:
The patent applies preliminary action by providing a display element that indicates the effective display region before the user attempts to view or calibrate. This allows the user to understand the visible area in advance and perform calibration within the correct region, preventing the need to change viewing direction and maintain detection accuracy.
Solution Approach 2:
The display element acts as an intermediary between the effective display region and the user. It provides visual guidance about which region is actually visible and usable, helping the user calibrate their line of sight without needing to physically move their eye or head, thus maintaining the positional relationship between the detector and the eye.
Data Source
AI summary
A display control apparatus includes an acquisition unit configured to acquire information regarding a line of sight of a user toward a display unit visually checked by the user through a viewfinder and a control unit configured to display on the display unit an image indicating, in a screen of the display unit, an effective display region in which a display element for calibration of the information is displayed. The control unit performs control so that the effective display region is displayed on the display unit based on any of a plurality of display settings including a first display setting for displaying the effective display region in a first size and a second display setting for displaying the effective display region in a second size smaller than the first size.