Rotatable Display Position Detection Power Management
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Solution Overview
Problem
Existing display devices face challenges in balancing user convenience with power conservation, requiring improvement in security, compactness, cost reduction, resource efficiency, and manufacturing ease while maintaining effective image display.
Innovation Solution
A display device with a rotatable display unit and position detection system that changes display modes based on the unit's position relative to the user's eyes, allowing continued image display even when not directly in front, and automatically switching off when far away to prevent power wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display unit is turned off when not positioned in front of user's eyes to save battery, then power consumption is reduced, but user convenience is sacrificed
Solution Approach 1:
The display mode is dynamically adjusted based on the display unit's position. When the display unit is at the first position (in front of eyes), full display mode is used. When moved to the second position (away from eyes), the system switches to a continued display mode that maintains display functionality with adjusted parameters, and when far away, turns off to save power. This dynamic adaptation resolves the contradiction between power saving and convenience.
Solution Approach 2:
The system changes display parameters (mode, brightness, refresh rate) based on position detection. Instead of a binary on/off state, the display operates in multiple modes with varying power consumption levels, allowing the system to optimize between power efficiency and user convenience by selecting appropriate display parameters for each position scenario.
2Ease of operation
If the display unit continuously displays images to maintain convenience, then user convenience is improved, but power consumption increases
Solution Approach 1:
When the display unit is at the second position, the system applies partial action by maintaining display in a continued mode with adjusted parameters rather than full display mode. This partial display action provides sufficient convenience for the user while consuming less power than continuous full display, effectively balancing convenience and power consumption.
3Use of energy by moving object
If the display mode is changed based on position to optimize power consumption, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The position detection unit serves multiple functions: detecting whether the display unit is at the first position, detecting when it moves to the second position, and determining when it is far away. This multi-functional sensor reduces the need for additional components, thereby limiting the increase in device complexity while enabling sophisticated power management based on position.
Data Source
AI summary
A display device includes a display unit which is able to take a first position which is a relative position with respect to user's eyes and a second position which is a relative position with respect to the eyes and is different from the first position. The display device further includes a display mode change unit which, when the display unit displaying an image at the first position is moved to the second position, changes the mode of the display continued on the display unit.