Display Mode Control for Vehicle Navigation Systems
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Solution Overview
Problem
Conventional electronic devices with GPS technology require manual switching between daytime and nighttime display modes, which is inconvenient for vehicle drivers.
Innovation Solution
An automatic display mode control method that uses a microprocessor to determine the time of day and switch the display panel between daytime and nighttime modes, with the display panel showing navigational map information in appropriate shades against backgrounds, using a microprocessor, clock circuit, and user-configurable start and end times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If manual switching between daytime and nighttime display modes is implemented, then the display panel can show navigational map information in appropriate shades, but the operation convenience deteriorates due to requiring driver intervention
Solution Approach 1:
The display panel automatically adjusts its display mode (daytime or nighttime) based on ambient light conditions detected by the light sensor, without requiring manual intervention from the driver. The system serves itself by continuously monitoring light levels and autonomously switching display modes to maintain optimal visibility while reducing driver workload
Solution Approach 2:
The system employs a light sensor to continuously monitor ambient light conditions and provides feedback to the microprocessor. Based on this feedback, the microprocessor automatically adjusts the display panel's illumination intensity and color characteristics, creating a closed-loop control system that responds dynamically to changing environmental conditions
2Ease of operation
If automatic display mode switching based on time of day is implemented, then driver distraction is reduced, but the system complexity increases due to additional control mechanisms
Solution Approach 1:
The microprocessor performs multiple functions: it controls the display panel mode switching, manages the light sensor readings, and coordinates with the GPS navigational system. By consolidating these control functions into a single microprocessor rather than using separate dedicated circuits for each function, the system achieves automatic operation without proportionally increasing overall system complexity
Solution Approach 2:
The invention combines the display control system with the existing GPS navigational system, sharing common components such as the microprocessor, power supply, and housing. The display panel serves dual purposes by adapting its characteristics for both daytime and nighttime operation within the same navigational device, reducing the need for separate systems
Data Source
AI summary
A display mode control method includes the steps of: enabling an electronic device to determine the time of day; and enabling the electronic device to operate a display panel thereof in a first display mode when the time of day corresponds to nighttime, and in a second display mode when otherwise. The display panel shows information in a light shade against a dark background when operated in the nighttime display mode, and in a dark shade against a light background when operated in the daytime display mode.