Digital Imaging Processor Eye Sensor Orientation Adaptation
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Solution Overview
Problem
Digital single lens reflex cameras consume unnecessary power when the display unit is turned on, even when the user is not viewing the subject, due to the eye sensor's limited ability to recognize the user's presence, especially when the camera is used in a vertical direction or when users with varying skin reflectivity are involved.
Innovation Solution
A digital image processor equipped with a sensing unit, a detecting unit comprising an emission and light receiving unit, and a control unit that adjusts the emission time and power supply based on the sensed rotation and incident light, allowing for enhanced user recognition by increasing or decreasing the emission time or pulse characteristics to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display unit is turned on continuously, then the user can always see the image, but unnecessary power is consumed when the user is not viewing
Solution Approach 1:
The eye sensor emits light periodically in pulses rather than continuously, and the display unit is controlled to turn on/off based on periodic detection cycles. This periodic operation allows the system to monitor user presence without continuous power consumption while maintaining display visibility when needed.
Solution Approach 2:
The system uses the user's own eye reflection to detect presence automatically. The eye sensor detects reflected light from the user's eyes, and the control unit automatically controls the display unit based on this detection, eliminating the need for manual power control by the user.
2Use of energy by moving object
If the eye sensor uses short emission time, then power consumption is reduced, but user recognition accuracy decreases
Solution Approach 1:
The system dynamically changes the emission time parameter based on camera orientation. When the camera is in vertical orientation, the emission time is extended to ensure sufficient light reflection is captured from the user's eyes, while in horizontal orientation the normal shorter emission time is used. This parameter adjustment maintains recognition accuracy while optimizing power consumption for each orientation.
3Adaptability or versatility
If the camera is used in vertical direction, then shooting flexibility is improved, but the eye sensor cannot recognize the user due to rotated position
Solution Approach 1:
The system dynamically adjusts the emission time of the eye sensor based on the detected camera orientation. When vertical orientation is detected, the emission time is automatically extended. This dynamic adaptation allows the system to maintain effective user recognition across different shooting orientations while preserving the flexibility to use the camera in various positions.
4Measurement precision
If the emission unit emits light continuously, then user recognition is improved, but power consumption increases
Solution Approach 1:
The emission unit operates in periodic pulses rather than continuously. The control unit activates the emission unit only during detection cycles when user recognition is needed, then deactivates it. This periodic operation significantly reduces power loss while maintaining sufficient user recognition accuracy by concentrating emission into necessary time windows.
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
The solution effectively reduces unnecessary power consumption by accurately recognizing the user's presence and adjusting the display unit's power accordingly, minimizing power loss across different user reflectivities and camera orientations.
Implementation Method 1
a light receiving unit for receiving light reflected by the user
Implementation Method 2
a sensing unit for sensing rotation of the digital image processor
Data Source
AI summary
A digital image processor and method of improving user recognition in the digital image processor are provided. The digital image processor includes a view finder for a user to view a subject and a display unit on which an image is electrically realized, the digital image processor includes: a sensing unit for sensing rotation of the digital image processor; a detecting unit disposed at one side of the view finder and comprising an emission unit for emitting light and a light receiving unit for receiving light reflected by the user; and a control unit for increasing time for emitting light from the emission unit when the rotation is sensed by the sensing unit and controlling power supply to the display unit based on an output value corresponding to an amount of incident light onto the light receiving unit.