Dual-Processor Display Device for Power-Constrained Information Output
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Solution Overview
Problem
Existing display devices on small-sized terminals face challenges in efficiently displaying a large amount of information while minimizing power consumption, as they often require high-power color displays and lack effective methods to switch between color and monochrome modes without significant power fluctuations.
Innovation Solution
A display device with two processors of different capacities, where a high-capacity main CPU handles color displays and a lower-capacity sub-CPU manages monochrome or simple displays, allowing the device to switch between color, segment, and simultaneous display modes to optimize information display and power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a color liquid crystal panel is used to display more information, then the information display capability is improved, but the power consumption increases
Solution Approach 1:
The display system is segmented into two independent display panels: a color liquid crystal panel for color information display and a black-and-white liquid crystal panel for monochrome information display. This segmentation allows the system to selectively activate only the necessary display mode, reducing overall power consumption while maintaining information display capability.
Solution Approach 2:
The system dynamically switches between color and black-and-white display modes based on power consumption requirements and information display needs. The control unit can adjust which display panel is active, enabling the system to adapt its power consumption characteristics to match the actual information display requirements.
2Use of energy by moving object
If a black-and-white liquid crystal panel is used to reduce power consumption, then the power consumption is reduced, but the information display capability is limited
Solution Approach 1:
The display system is segmented into two independent display panels: a color liquid crystal panel for color information display and a black-and-white liquid crystal panel for monochrome information display. This segmentation allows the system to selectively activate only the necessary display mode, reducing overall power consumption while maintaining information display capability.
Solution Approach 2:
The display system provides multi-functionality by supporting both color and black-and-white display modes through two separate panels. This allows the system to universally handle different types of information display requirements, whether color-rich content or simple monochrome information, while optimizing power consumption for each scenario.
3Loss of information
If vertical stacking of color and black-and-white panels is implemented, then the information display capability is improved, but the device complexity increases
Solution Approach 1:
The display system uses a nested structure where the black-and-white liquid crystal panel is positioned behind the color liquid crystal panel in a vertical stack. This nesting arrangement allows both display panels to be integrated within a compact form factor, minimizing the increase in device complexity while enabling enhanced information display capability.
Solution Approach 2:
The system resolves complexity by transitioning from a horizontal arrangement to a vertical stacking configuration. This dimensional change allows both color and black-and-white display panels to be integrated in the same spatial footprint, reducing the overall device complexity while maintaining enhanced information display capabilities.
Data Source
Figure 1
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Figure 4A~4D
AI summary
A display device includes: a first display (114), a second display (124) stacked on a visible side of the first display (114) and having power consumption lower than that of the first display (114), a first processor (111) controls the first display (114), and a second processor (121) controls the first display (114) and the second display (124) and having power consumption lower than that of the first processor (111). In a state in which operation of the first processor (111) is halted, the second processor (121) causes the second display (124) to display second information and simultaneously causes the first display (114) to display first information having a lighter processing load than information that the first processor (111) causes to be displayed by the first display (114).