Projector Obstacle Detection and Visual Feedback Control
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Solution Overview
Problem
Users of existing display devices that detect operations using light are not informed when obstacles interfere with the detection process, making it difficult to recognize when operations cannot be performed.
Innovation Solution
A display device that includes a light radiation unit to set a detection area, a light receiving unit to detect reflected light, and a control unit to identify obstacles and hindered areas, providing visual information to the user about obstacles and hindered detection areas, allowing for user settings to enable or disable detection in these areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device detects obstacles and eliminates affected areas from operation, then detection reliability is improved, but the user cannot recognize that operation is no longer possible
Solution Approach 1:
The system provides visual feedback by displaying the detection area and hindered areas on the display unit. The control unit outputs information about the detection area and hindered areas to the display unit, allowing users to see exactly where operations can and cannot be performed, thus resolving the information loss while maintaining detection reliability
Solution Approach 2:
The display unit acts as an intermediary between the detection system and the user. It translates the internal detection status into visual information that users can understand, showing the detection area and hindered areas separately, thereby bridging the gap between reliable detection and user awareness
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 solution enables users to be aware of obstacles and hindered areas, allowing them to take appropriate measures, ensuring effective operation of the display device by providing clear visual information and user control over detection settings.
Implementation Method 1
a light receiving unit which receives reflected light of the detection light reflected in the detection area
Data Source
AI summary
A projector includes: a projection unit; a detection light irradiation unit which radiates detection light onto a detection area which is set corresponding to a display area of the projection unit; an image pickup unit which receives reflected light of irradiation detection light reflected in the detection area; and a control unit which carries out detection of an operation of a non-light-emitting pointing element and detection of an obstacle blocking the detection light, and causes the projection unit to display information about the obstacle.