Video Projection Device Gesture Detection Range Control
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Solution Overview
Problem
Current image projection devices face challenges in accurately detecting fine gestures due to broad detection ranges and low sensitivity, leading to difficulties in distinguishing operator gestures from unwanted movements.
Innovation Solution
The image projection device incorporates a detection range control unit that adjusts the detection range based on the projection direction, using a combination of sensors and light sources to optimize gesture detection, including laser scanning and passive sensors, ensuring accurate gesture recognition without erroneous detections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the detection range is broad to cover the projection range, then the sensor can detect persons in the projection area, but the sensitivity decreases making it difficult to detect fine gestures
Solution Approach 1:
The detection range is divided into multiple zones: a first detection range for wall surface projection and a second detection range for tabletop projection. The control unit selectively activates the appropriate detection range based on the projection type, ensuring high gesture detection accuracy while covering the necessary area for each specific use case.
Solution Approach 2:
The detection range is made dynamic and adjustable based on the projection direction and type. The control unit automatically switches between different detection ranges (first for wall projection, second for tabletop projection) to optimize both coverage area and gesture detection sensitivity for each scenario.
2Measurement precision
If the detection range is reduced to improve gesture detection accuracy, then fine movements can be detected, but the projection range and detection range no longer align
Solution Approach 1:
The detection range dynamically adapts to match the projection range for each projection type. For wall surface projection, the first detection range aligns with the wall projection area. For tabletop projection, the second detection range aligns with the tabletop projection area, ensuring both high accuracy and proper alignment.
Solution Approach 2:
Different detection ranges are configured for different projection scenarios. The first detection range is optimized for wall surface projection with appropriate sensitivity and coverage, while the second detection range is optimized for tabletop projection, allowing each zone to have the specific properties needed for its function.
3Ease of operation
If a single detection range is used for all projection types, then the device is simple to operate, but gesture detection accuracy varies across different projection scenarios
Solution Approach 1:
The control unit automatically determines the projection type (wall surface or tabletop) and selects the appropriate detection range without requiring manual configuration. This self-service approach maintains ease of operation while optimizing gesture detection accuracy for each projection scenario.
Solution Approach 2:
The detection system is designed to handle multiple projection types (wall surface and tabletop) with a single unified control mechanism. The control unit universally manages both detection ranges and automatically switches between them based on the projection type, providing multi-functionality without complicating user operation.
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
This solution enhances the accuracy of gesture detection, preventing false positives and improving sensitivity by tailoring the detection range to specific projection states, such as wall surface or tabletop projections.
Implementation Method 1
a detection element 2 having a light source for detecting the gesture or may be a passive sensor having no light source
Implementation Method 2
using a combination of sensors and light sources to optimize gesture detection, including laser scanning
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
Provided is a video projection device that carries out high precision gesture detection. A video projection device (1) has a projection unit (4) that optically projects video and a gesture detection unit (14) that detects human gestures and generates a signal for operating the projected video on the basis of the detection results. The gesture detection unit (14) controls a range (2a) for detecting gesture according to the direction that the projection unit (4) projects light and/or the placement state of the video projection device (1). The device has a laser light source and photodiode for detecting gestures, or has a pyroelectric sensor for detecting infrared rays.