Vehicular Display System with Dynamic Data Scaling
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Solution Overview
Problem
Existing vehicular display systems do not effectively utilize the LCD display device for navigation and meter information, leading to user inconvenience in accessing required information, especially when screen displays switch based on vehicle speed.
Innovation Solution
A vehicular display system that includes an in-vehicle navigation device and a meter device, where the navigation device produces and transmits intermediate data to the meter device, allowing for display size changes to optimize the presentation of map and travel guidance information, ensuring easy readability for the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If screen displays are switched according to vehicle speed, then information relevant to current driving conditions is displayed, but user search time for specific information increases
Solution Approach 1:
The display screen is divided into multiple fixed display areas with predetermined functions (speedometer area, navigation area, etc.). Each area maintains its designated function regardless of vehicle speed, allowing users to quickly locate information without searching through dynamically switching full-screen displays.
Solution Approach 2:
Instead of switching entire screen displays based on speed conditions, the patent inverts the approach by maintaining multiple simultaneous displays in fixed areas. The navigation device sends different types of data to different fixed areas based on speed, rather than switching which area shows what type of information.
2Device complexity
If the meter display is not coordinated with navigation device, then device complexity is reduced, but LCD display utilization efficiency decreases
Solution Approach 1:
The meter display device is designed to serve multiple functions: displaying traditional meter information (speed, RPM) and simultaneously displaying navigation information (maps, route guidance). The navigation data is processed and displayed in the meter display areas alongside or integrated with traditional meter data, maximizing the utilization of the LCD display.
Solution Approach 2:
The patent introduces an intermediary processing mechanism where the navigation device sends navigation data to the meter ECU, which then processes and distributes appropriate navigation information to the meter display areas. This intermediary approach allows coordination between the navigation device and meter display without requiring direct complex integration, maintaining relative system simplicity while achieving efficient display utilization.
3Ease of operation
If navigation information is displayed on meter display, then information accessibility is improved, but information density and readability may decrease
Solution Approach 1:
Different display areas are assigned different qualities and functions: the navigation area displays map and route information with appropriate detail level, while the speedometer area maintains high precision for speed readings. Each area is optimized for its specific purpose, ensuring both accessibility and precision where needed.
Solution Approach 2:
The system displays only the essential navigation information (simplified map, key route guidance) in the meter display areas rather than attempting to show complete navigation data. This partial display approach ensures that navigation information is accessible without compromising the precision and readability of critical meter information like speed.
Data Source
AI summary
A vehicular display system includes an in-vehicle navigation device and a vehicular meter device. The in-vehicle navigation device includes a display, a navigation data producing device for producing first data that is to be displayed on the display, and a transmitting device for transmitting intermediate data to the vehicular meter device. The vehicular meter device includes a receiving device for receiving the intermediate data from the in-vehicle navigation device and a navigation data display area for displaying second data. A display size changing device for changing the first data into the second data is included in at least one of the in-vehicle navigation device and the vehicular meter device. A display size of the first data is different from the display size of the second data.