Projector Aspect Ratio Adaptation via EDID Feedback
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Solution Overview
Problem
Existing projectors cannot change the aspect ratio or resolution of an image inputted from external devices such as personal computers or disc playback devices through their own operations, limiting user control over image projection settings.
Innovation Solution
A projector with a communication unit, projection unit, setting unit, and control unit that allows for the transmission of aspect ratio information to external devices, enabling the projector to change the aspect ratio or resolution of incoming image information and automatically select a fitting aspect ratio for the projection surface based on detection data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector only displays images with fixed aspect ratios, then the device complexity is reduced, but the adaptability to different projection surfaces and external devices is limited
Solution Approach 1:
The projector transmits aspect ratio information to the external device, receives feedback about the external device's capabilities, and automatically adjusts the projection aspect ratio accordingly. This feedback loop enables the projector to adapt to different aspect ratios without requiring complex manual configuration, resolving the contradiction between adaptability and device complexity
Solution Approach 2:
The projector automatically determines and adjusts its own aspect ratio based on information exchanged with the external device, without requiring manual intervention. The system performs self-configuration by transmitting capability information and automatically selecting appropriate projection parameters, thereby achieving high adaptability while keeping the user interface simple
2Productivity
If the projector manually adjusts aspect ratio through operation panels, then ease of operation is improved, but productivity is reduced due to manual intervention requirements
Solution Approach 1:
The projector automatically adjusts its aspect ratio by exchanging capability information with the external device and autonomously determining the optimal projection parameters. This eliminates the need for manual operation panel input, thereby improving productivity while maintaining ease of operation through automatic adaptation
Solution Approach 2:
The projector pre-transmits its capability information (supported aspect ratios) to the external device before actual projection begins. This preliminary exchange of information enables the external device to prepare appropriate image data, and allows the projector to automatically configure itself, improving productivity without requiring complex manual operations during setup
3Adaptability or versatility
If the projector transmits detailed capability information to external devices, then adaptability is improved, but loss of information increases due to communication overhead
Solution Approach 1:
The projector extracts and transmits only the essential capability information (supported aspect ratios) to the external device, rather than transmitting all possible configuration parameters. This selective transmission of critical information enables adaptability while minimizing communication overhead and information loss
Solution Approach 2:
The projector dynamically changes its operational parameters (aspect ratio) based on the capability information exchanged with the external device. By transmitting compact capability data and adjusting parameters accordingly, the system achieves high adaptability while maintaining efficient communication with minimal information loss
Data Source
AI summary
A projector includes: an image interface unit; a projection unit which projects a projection image based on image information, onto a screen; a setting unit which sets an aspect ratio of the projection image; a projection control unit which causes the projection unit to project the projection image according to the aspect ratio set by the setting unit; and an EDID processing unit which causes first information about an aspect ratio of the image information to be transmitted to a PC. If the setting unit changes the aspect ratio of the projection image from a first aspect ratio to a second aspect ratio, the EDID processing unit causes the first information based on the second aspect ratio to be transmitted to the PC.