Terminal Device Illumination Control for Power Reduction
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Solution Overview
Problem
In terminal devices with multiple displays, existing methods consume excessive power as all screens are illuminated at a brightness suitable for application use, even when only one is actively viewed, leading to unnecessary brightness and power consumption on inactive screens.
Innovation Solution
A terminal device with a controller that adjusts the brightness of displays based on user operations, illuminating only the actively selected screen at a higher brightness level and other screens at a lower level suitable for recognition, reducing overall power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all display screens are illuminated at a brightness level suitable for using applications, then the user can easily view and use applications on any screen, but the display screens other than the actively watched screen are brighter than necessary, causing excessive power consumption
Solution Approach 1:
The patent applies local quality by differentiating the brightness levels of different display screens based on their usage status. The actively watched screen (first display) is illuminated at a higher first brightness level suitable for application use, while other screens (second displays) are illuminated at a lower second brightness level. This resolves the contradiction by providing high brightness only where needed (improving ease of operation for the active screen) while reducing brightness on inactive screens (reducing power consumption).
Solution Approach 2:
The patent segments the illumination control of multiple display screens into distinct groups: the first display screen that is actively watched and other display screens that are not actively watched. By segmenting the brightness control, the system can apply different brightness levels to different segments, allowing the active screen to maintain high brightness for ease of operation while inactive screens consume less power, thus resolving the technical contradiction.
2Ease of operation
If the display screen is illuminated at a brightness level suitable for using applications when the user checks displayed information, then the user can easily view information, but the display screen is illuminated brighter than necessary, causing excessive power consumption
Solution Approach 1:
The patent applies dynamics by making the brightness level adaptive based on the user's interaction state. When the user is checking information on a display screen, it is illuminated at a lower second brightness level to save power. When the user selects the display screen for active application use, the brightness dynamically increases to the first brightness level. This dynamic adjustment resolves the contradiction by matching brightness to the actual operational need rather than maintaining constant high brightness.
Solution Approach 2:
The patent changes the illumination parameter (brightness level) based on the operational context. Display screens transition between two brightness states: a lower second brightness level for information checking and a higher first brightness level for active application use. This parameter change resolves the technical contradiction by adjusting brightness to match the required ease of operation for each usage scenario, avoiding excessive power consumption during information checking while ensuring adequate brightness when applications are being used.
Data Source
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AI summary
A terminal device is provided that includes screens and solves a problem in that power is consumed more than necessary. When a prescribed operation is performed on operation section 104, controller 105 causes LCD controller 103 to illuminate at least one of LCDs 101 and 102 at a first brightness levels. Subsequently, a selection operation of selecting any one of LCDs 101 and 102 is performed on operation section 104. When the selected LCD is illuminated at the first brightness levels, controller 105 causes LCD controller 103 to illuminate the LCD selected by the selection operation at a second brightness levels higher than the first brightness levels.