Projection System Obstacle Detection for Automatic Playback Pausing
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Solution Overview
Problem
Existing projection systems require manual intervention to pause playback when an obstacle obstructs the projection path, which is inconvenient for users.
Innovation Solution
A projection system equipped with a distance sensor and processor that automatically pauses playback when an obstacle is detected on the projection path, using calculated distance values to determine when to pause and resume playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual pause operation is used when obstacle appears, then playback can be paused, but user convenience deteriorates due to requiring manual intervention
Solution Approach 1:
The projection apparatus automatically detects obstacles using a distance sensor and autonomously pauses playback without requiring user intervention. The system serves itself by monitoring the projection path and controlling playback based on detected obstacle presence, eliminating the need for manual pause operations.
Solution Approach 2:
The distance sensor continuously monitors the projection path and provides feedback to the processor. When the sensor detects an obstacle (distance value below threshold), the processor receives this feedback and automatically pauses playback. This closed-loop feedback mechanism ensures reliable automatic playback control.
2Extent of automation
If distance sensor is added to detect obstacles, then automatic pause function is achieved, but device complexity increases
Solution Approach 1:
The distance sensor serves multiple functions: it detects obstacles on the projection path, provides distance information for playback control, and enables automatic pause/resume operations. By making the sensor multi-functional, the patent reduces the need for additional specialized components, thereby limiting the increase in device complexity.
Solution Approach 2:
The obstacle detection function is merged with the existing playback control system. The distance sensor is integrated with the processor that already controls playback, combining detection and control functions into a unified system rather than adding a separate standalone obstacle detection system.
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
Automated playback control enhances user experience by seamlessly pausing and resuming projection without user intervention when obstacles appear and disappear.
Implementation Method 1
receiving a plurality of first distance values within a first time through a distance sensor
Data Source
AI summary
A projection system and control method thereof are provided. A player apparatus generates and transmits an image signal to a projection apparatus, and a plurality of first distance values within a first time are received through a distance sensor. An average value of the plurality of first distance values is calculated and set as a reference value. During a playback of the image signal, an average value of a plurality of second distance values received from the distance sensor is calculated every second time to serve as a first-stage detection value. When the first-stage detection value is less than the reference value, the image signal is paused.