Flexible Display Power Control via Sensor-Based Area Segmentation
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Solution Overview
Problem
Flexible displays in portable terminals consume excessive power when bent, as areas outside the user's viewing angle range continue to display content, wasting energy.
Innovation Solution
A portable device with a flexible display that includes a sensor to detect the user's face and ambient brightness, controlling the display to show information only in areas within the user's view, thereby reducing power consumption by displaying black data in unused areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the flexible display is used as a full screen, then the display area is maximized, but power consumption increases
Solution Approach 1:
The flexible display is divided into a first area and a second area. The controller selectively displays information in only one area at a time based on bending state and environmental conditions, rather than illuminating the entire display screen. This segmentation allows the display to maintain large potential area while reducing actual power consumption by activating only the necessary portion.
2Ease of operation
If the flexible display is bent, then the portable terminal becomes more portable, but areas outside the viewing angle range waste power
Solution Approach 1:
The display system dynamically adjusts which area (first or second) is active based on the bending state of the flexible display and environmental conditions detected by sensors. This dynamic adaptation ensures that power is consumed only when and where needed, eliminating waste in areas outside the user's viewing angle while maintaining portability benefits.
Solution Approach 2:
The controller uses feedback from sensors detecting the bending state and environmental conditions to determine which display area to activate. This closed-loop control system continuously monitors the display state and adjusts power distribution accordingly, preventing energy waste in non-viewable areas while maintaining optimal display functionality.
3Use of energy by moving object
If the sensor and controller are added to detect face and brightness, then power consumption is reduced in bent state, but device complexity increases
Solution Approach 1:
The sensor serves multiple functions: detecting user presence, determining viewing angle, and sensing environmental brightness conditions. The controller integrates multiple control decisions (bending state response, brightness adjustment, area selection) into a single component. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while achieving power reduction goals.
Data Source
AI summary
A portable device with a flexible display and a method for displaying information in the portable device with a flexible display are provided. The portable device includes a sensor for detecting at least one of a user's face and an ambient brightness, the flexible display including a first area and a second area, and a controller for displaying information in the first area when at least one of the user's face is detected and the ambient brightness has a value greater than a threshold, and for displaying the information in the second area when at least one of the user's face is not detected and the ambient brightness has value less than the threshold.