Interactive Projection Control via Light Spot Detection
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Solution Overview
Problem
Current projection technologies lack the ability for users to perform real-time marking and interactive operations on projected content during presentations, limiting user control and engagement.
Innovation Solution
An electronic device with a processor and storage circuit that controls a projector to project content, detects a light spot emitted by an indicator device, and adjusts the display content based on the light spot's movement, enabling interactive functions such as marking, page switching, and function triggering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional projector control methods are used, then the projector can display content, but users cannot perform real-time marking operations on the projected content
Solution Approach 1:
The patent introduces an indicator device as an intermediary between the user and the projected content. This device emits light spots that can be detected by the projection system, enabling users to perform marking operations on the projected content without directly touching the projection surface. The indicator device acts as a mediator that translates user gestures into controllable interactions with the displayed content.
Solution Approach 2:
The patent replaces traditional mechanical interaction methods (such as physical buttons or remote controls) with an optical-based interaction system. The indicator device uses light emission and detection mechanisms to enable marking operations, substituting mechanical control with optical field interaction. This allows for more natural and versatile control of the projected content.
2Adaptability or versatility
If no interaction mechanism is added, then the system remains simple, but user control and engagement are limited
Solution Approach 1:
The projection system is designed to serve multiple functions: it can project content, detect light spots from the indicator device, and process marking operations. By making the system universal and multi-functional, it can handle both traditional projection tasks and new interactive marking operations without requiring entirely separate systems, thus balancing versatility with manageable complexity.
Solution Approach 2:
The system uses its own projection capability to enable interaction detection. The projector not only displays content but also detects the light spots emitted by the indicator device against the projected background. This self-service approach allows the same device to provide both the display function and the interaction detection function, reducing overall system complexity.
3Ease of operation
If real-time detection of light spot movement is implemented, then marking operations become possible, but detection precision requirements increase
Solution Approach 1:
The system implements a feedback mechanism where the projected content serves as a reference background against which light spot positions are detected and measured. The detection system compares the light spot position relative to the known projected content coordinates, providing continuous feedback that enables precise marking operations. This feedback loop allows the system to maintain high detection precision by constantly referencing the stable projected image.
Data Source
AI summary
The disclosure provides a method for controlling a projection content and an electronic device. The method includes: controlling a projector to project a display content on a projection plane; obtaining a display range of the display content on the projection plane; detecting a light spot on the projection plane; and adjusting the display content based on a movement condition of the light spot with respect to the display range.