Projection-Direction Sensing for Touch and Gesture Projectors
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Solution Overview
Problem
Projectors require external devices for interaction and are limited to a single projection direction, failing to accurately receive user inputs when the projection direction or distance is changed.
Innovation Solution
A projector equipped with sensors to detect projection direction and surface state, enabling touch inputs when aligned and gesture inputs when perpendicular, with keystone correction for distorted surfaces and obstacle detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector supports multiple projection directions and gesture inputs, then user interaction capability is improved, but device complexity increases
Solution Approach 1:
The projector integrates multiple sensing capabilities (touch sensing, gesture recognition, projection direction detection) into a single device, enabling it to perform multiple interaction functions. The sensing unit can detect both touch inputs on the projection surface and gesture inputs in space around the projector, making the device universally adaptable to different interaction scenarios without requiring separate external devices.
Solution Approach 2:
The processor acts as an intermediary that receives signals from the sensing unit, determines the projection direction, and selectively processes either touch inputs or gesture inputs based on the detected orientation. This intermediary logic layer manages the complexity by automatically routing different input types to appropriate processing pathways, reducing the need for complex user configuration.
2Measurement precision
If the projector accurately detects projection direction and adjusts input recognition, then user input accuracy is improved, but measurement precision requirements increase
Solution Approach 1:
The projector continuously monitors the projection direction using the sensing unit and provides feedback to the processor. Based on this feedback, the system dynamically adjusts which input mode (touch or gesture) is active. This closed-loop feedback mechanism ensures accurate user input recognition by constantly adapting to changes in projector orientation without requiring manual reconfiguration.
Solution Approach 2:
The projector automatically detects its own projection direction and self-adjusts the input recognition mode without requiring external devices or manual intervention. The sensing unit and processor work together to autonomously determine whether the projector is in a orientation suitable for touch input or gesture input, making the system self-sufficient in adapting to different usage scenarios.
3Adaptability or versatility
If the projector enables touch input on projection surface, then interaction capability is improved, but reliability decreases when projection direction changes
Solution Approach 1:
The projector dynamically switches between touch input mode and gesture input mode based on the detected projection direction. When the projector is oriented for surface projection, touch input is enabled; when oriented for spatial projection, gesture input is enabled. This dynamic adaptation ensures that the appropriate interaction mode is always active, maintaining reliability across different projection scenarios.
Solution Approach 2:
The system changes the operational parameters of input recognition based on projection direction. The processor modifies which sensing modalities are active (touch vs. gesture) according to the detected orientation parameters. This parameter-based adaptation ensures that user input reception remains reliable regardless of how the projector is positioned or oriented in space.
Data Source
AI summary
A projector including at least one sensor; a memory storing one or more instructions; and at least one processor to execute the instructions to detect a projection direction of the projector, when the detected projection direction is toward a surface on which the projector is placed, detect a touch input on a projection surface to which the projector projects an image, recognize the touch input as a user input, and perform an operation corresponding to the touch input recognized as the user input, and when the detected projection direction is toward a surface perpendicular to the surface on which the projector is placed, detect a gesture input of a user in a sensing area formed in an opposite direction of the projection surface with respect to the projector, recognize the gesture input as a user input, and perform an operation corresponding to the gesture input recognized as the user input.