Vehicle Telltale Display Control With Dual Microcomputers
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Solution Overview
Problem
Conventional vehicle display devices struggle with increased power consumption due to the integration of functions in a single electronic control unit (ECU), especially when displaying telltales that require continuous graphical processing.
Innovation Solution
A display device for vehicles that incorporates a dual-microcomputer system, where a first microcomputer handles integrated display control for multiple displays and a second microcomputer, with lower power consumption, controls the display state of telltales using a separate telltale display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single ECU performs integrated display control of multiple displays, then display control integration is achieved, but power consumption increases
Solution Approach 1:
The electronic control unit is segmented into a first microcomputer and a second microcomputer. The first microcomputer handles integrated display control for multiple displays, while the second microcomputer specifically controls telltale display with lower power consumption. This segmentation allows the system to maintain integration capabilities while reducing overall power consumption by assigning specific low-power tasks to a dedicated low-power processor.
Solution Approach 2:
The system dynamically switches between different microcomputers based on the display control task. For general display control, the first microcomputer is used, but for telltale display specifically, the second microcomputer takes over to reduce power consumption. This dynamic task allocation optimizes the balance between integrated control capability and power consumption.
2Adaptability or versatility
If color liquid crystal is used for telltales, then display functionality is maintained, but power consumption increases due to continuous graphical processing
Solution Approach 1:
The telltale display control function is extracted from the main integrated display control system. By separating telltale control into a dedicated second microcomputer with lower power consumption characteristics, the system maintains full telltale functionality while extracting the high power consumption aspect from the overall system, thereby reducing total power consumption.
3Reliability
If the entire system operates even for single functions, then functional completeness is ensured, but power consumption increases
Solution Approach 1:
The system is segmented into independent microcomputer units that can operate autonomously for their specific functions. The second microcomputer can independently handle telltale display control without requiring the first microcomputer to be fully operational, thus maintaining functional completeness for critical telltale functions while reducing overall power consumption.
Solution Approach 2:
Different parts of the system have different operational requirements. The telltale display, being critical for vehicle operation, maintains full functionality through the second microcomputer even when the main display system is powered down. This local quality approach ensures critical functions remain operational with minimal power consumption.
Data Source
AI summary
A display device for a vehicle includes a plurality of displays mounted in a vehicle; an electronic control unit that controls, in an integrated manner, information displayed on the plurality of displays; and a telltale display that displays a telltale of the vehicle. The electronic control unit includes a first microcomputer that controls a display state of each of the plurality of displays, and a second microcomputer that operates with lower power consumption than the first microcomputer and controls a display state of the telltale display.