Sensor-Guided Image Projector Control for Flexible Wall Projection
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Solution Overview
Problem
Conventional image projection devices require manual adjustment of the light source unit direction and setting values to project images on different screen regions, limiting their flexibility and usability, especially when using walls as screens in home environments.
Innovation Solution
An image projection device with a rotatable head, adjustable support, and base rotation capabilities, equipped with sensors and actuators to automatically detect and adjust the projection direction and size based on user input, ambient conditions, and satellite speakers for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image projection device uses a fixed setting value and fixed screen region, then the device structure is simple and easy to manufacture, but the adaptability to different wall surfaces and projection locations is poor
Solution Approach 1:
The patent implements a rotatable head assembly that can change the projection direction dynamically. The head is rotated by a rotation drive unit (motor) based on user input or detected wall surface locations, allowing the device to adapt to different projection locations without requiring multiple fixed devices. This dynamic adjustment mechanism resolves the contradiction by enabling versatility through controlled movement rather than structural complexity.
Solution Approach 2:
The projection device is designed to project images onto multiple types of surfaces including walls, ceilings, and floors by rotating the head assembly to different angles. The same device structure serves multiple functions (projecting on different surfaces) through the rotatable mechanism, eliminating the need for separate devices for each surface type and thus achieving universality without proportionally increasing complexity.
2Adaptability or versatility
If the light source unit direction is manually adjusted to project on different screen regions, then the device can be versatile, but the ease of operation deteriorates due to manual adjustment requirements
Solution Approach 1:
The device incorporates sensors (camera, microphone) that automatically detect the user's desired projection location and the surrounding environment. The control unit processes this information and automatically commands the rotation drive unit to orient the projection towards the detected wall surface, eliminating the need for manual direction adjustment. The system serves itself by autonomously determining and executing the correct projection orientation.
Solution Approach 2:
The device uses sensors to continuously monitor the environment and user input, providing feedback to the control unit. Based on this feedback (detected wall surface position, user voice commands, or gestures), the system automatically adjusts the head rotation to achieve the desired projection location. This closed-loop feedback mechanism replaces manual adjustment with automated environmental sensing and response.
3Manufacturing precision
If the device requires setting value modification for different screen regions, then the projection can be precise, but the productivity deteriorates due to time-consuming reconfiguration
Solution Approach 1:
The device performs preliminary detection of the projection target using sensors before actual image projection. The control unit calculates the required projection parameters (angle, distance, focus) based on the detected wall surface characteristics and pre-configures the rotation mechanism accordingly. This preliminary action of detecting and calculating projection parameters eliminates the need for time-consuming manual setting adjustments while maintaining precise projection.
4Adaptability or versatility
If the head is made rotatable with fastening groove and protruding portion coupling, then the adaptability to different projection angles is improved, but the device complexity increases due to additional mechanical components
Solution Approach 1:
The head assembly is designed with a rotatable joint featuring a fastening groove and protruding portion that allows controlled angular movement. The rotation drive unit (motor) provides dynamic adjustment capability, enabling the head to rotate to different angles as needed. This mechanical design achieves adaptability through controlled movement rather than requiring multiple fixed angular positions, reducing the need for complex multi-position coupling mechanisms.
Data Source
AI summary
An image projection device can include an input unit including a camera which obtains ambient image information and a microphone which collects ambient sound signals including voices, a sensing unit including an illuminance sensor which detects ambient illuminance, an output unit including an image output unit which outputs the image information and a light source unit which emits light, a drive unit capable of changing the horizontal direction and vertical direction the output unit is facing, as well as the height of the output unit, and a control unit which determines whether an image projection request is made on the basis of the information sensed through the input unit, and which controls the drive unit and the output unit.